File: | clang/lib/Sema/SemaDeclCXX.cpp |
Warning: | line 4308, column 29 Called C++ object pointer is null |
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1 | //===------ SemaDeclCXX.cpp - Semantic Analysis for C++ Declarations ------===// | ||||||||||
2 | // | ||||||||||
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | ||||||||||
4 | // See https://llvm.org/LICENSE.txt for license information. | ||||||||||
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | ||||||||||
6 | // | ||||||||||
7 | //===----------------------------------------------------------------------===// | ||||||||||
8 | // | ||||||||||
9 | // This file implements semantic analysis for C++ declarations. | ||||||||||
10 | // | ||||||||||
11 | //===----------------------------------------------------------------------===// | ||||||||||
12 | |||||||||||
13 | #include "clang/AST/ASTConsumer.h" | ||||||||||
14 | #include "clang/AST/ASTContext.h" | ||||||||||
15 | #include "clang/AST/ASTLambda.h" | ||||||||||
16 | #include "clang/AST/ASTMutationListener.h" | ||||||||||
17 | #include "clang/AST/CXXInheritance.h" | ||||||||||
18 | #include "clang/AST/CharUnits.h" | ||||||||||
19 | #include "clang/AST/ComparisonCategories.h" | ||||||||||
20 | #include "clang/AST/EvaluatedExprVisitor.h" | ||||||||||
21 | #include "clang/AST/ExprCXX.h" | ||||||||||
22 | #include "clang/AST/RecordLayout.h" | ||||||||||
23 | #include "clang/AST/RecursiveASTVisitor.h" | ||||||||||
24 | #include "clang/AST/StmtVisitor.h" | ||||||||||
25 | #include "clang/AST/TypeLoc.h" | ||||||||||
26 | #include "clang/AST/TypeOrdering.h" | ||||||||||
27 | #include "clang/Basic/AttributeCommonInfo.h" | ||||||||||
28 | #include "clang/Basic/PartialDiagnostic.h" | ||||||||||
29 | #include "clang/Basic/TargetInfo.h" | ||||||||||
30 | #include "clang/Lex/LiteralSupport.h" | ||||||||||
31 | #include "clang/Lex/Preprocessor.h" | ||||||||||
32 | #include "clang/Sema/CXXFieldCollector.h" | ||||||||||
33 | #include "clang/Sema/DeclSpec.h" | ||||||||||
34 | #include "clang/Sema/Initialization.h" | ||||||||||
35 | #include "clang/Sema/Lookup.h" | ||||||||||
36 | #include "clang/Sema/ParsedTemplate.h" | ||||||||||
37 | #include "clang/Sema/Scope.h" | ||||||||||
38 | #include "clang/Sema/ScopeInfo.h" | ||||||||||
39 | #include "clang/Sema/SemaInternal.h" | ||||||||||
40 | #include "clang/Sema/Template.h" | ||||||||||
41 | #include "llvm/ADT/ScopeExit.h" | ||||||||||
42 | #include "llvm/ADT/SmallString.h" | ||||||||||
43 | #include "llvm/ADT/STLExtras.h" | ||||||||||
44 | #include "llvm/ADT/StringExtras.h" | ||||||||||
45 | #include <map> | ||||||||||
46 | #include <set> | ||||||||||
47 | |||||||||||
48 | using namespace clang; | ||||||||||
49 | |||||||||||
50 | //===----------------------------------------------------------------------===// | ||||||||||
51 | // CheckDefaultArgumentVisitor | ||||||||||
52 | //===----------------------------------------------------------------------===// | ||||||||||
53 | |||||||||||
54 | namespace { | ||||||||||
55 | /// CheckDefaultArgumentVisitor - C++ [dcl.fct.default] Traverses | ||||||||||
56 | /// the default argument of a parameter to determine whether it | ||||||||||
57 | /// contains any ill-formed subexpressions. For example, this will | ||||||||||
58 | /// diagnose the use of local variables or parameters within the | ||||||||||
59 | /// default argument expression. | ||||||||||
60 | class CheckDefaultArgumentVisitor | ||||||||||
61 | : public ConstStmtVisitor<CheckDefaultArgumentVisitor, bool> { | ||||||||||
62 | Sema &S; | ||||||||||
63 | const Expr *DefaultArg; | ||||||||||
64 | |||||||||||
65 | public: | ||||||||||
66 | CheckDefaultArgumentVisitor(Sema &S, const Expr *DefaultArg) | ||||||||||
67 | : S(S), DefaultArg(DefaultArg) {} | ||||||||||
68 | |||||||||||
69 | bool VisitExpr(const Expr *Node); | ||||||||||
70 | bool VisitDeclRefExpr(const DeclRefExpr *DRE); | ||||||||||
71 | bool VisitCXXThisExpr(const CXXThisExpr *ThisE); | ||||||||||
72 | bool VisitLambdaExpr(const LambdaExpr *Lambda); | ||||||||||
73 | bool VisitPseudoObjectExpr(const PseudoObjectExpr *POE); | ||||||||||
74 | }; | ||||||||||
75 | |||||||||||
76 | /// VisitExpr - Visit all of the children of this expression. | ||||||||||
77 | bool CheckDefaultArgumentVisitor::VisitExpr(const Expr *Node) { | ||||||||||
78 | bool IsInvalid = false; | ||||||||||
79 | for (const Stmt *SubStmt : Node->children()) | ||||||||||
80 | IsInvalid |= Visit(SubStmt); | ||||||||||
81 | return IsInvalid; | ||||||||||
82 | } | ||||||||||
83 | |||||||||||
84 | /// VisitDeclRefExpr - Visit a reference to a declaration, to | ||||||||||
85 | /// determine whether this declaration can be used in the default | ||||||||||
86 | /// argument expression. | ||||||||||
87 | bool CheckDefaultArgumentVisitor::VisitDeclRefExpr(const DeclRefExpr *DRE) { | ||||||||||
88 | const NamedDecl *Decl = DRE->getDecl(); | ||||||||||
89 | if (const auto *Param = dyn_cast<ParmVarDecl>(Decl)) { | ||||||||||
90 | // C++ [dcl.fct.default]p9: | ||||||||||
91 | // [...] parameters of a function shall not be used in default | ||||||||||
92 | // argument expressions, even if they are not evaluated. [...] | ||||||||||
93 | // | ||||||||||
94 | // C++17 [dcl.fct.default]p9 (by CWG 2082): | ||||||||||
95 | // [...] A parameter shall not appear as a potentially-evaluated | ||||||||||
96 | // expression in a default argument. [...] | ||||||||||
97 | // | ||||||||||
98 | if (DRE->isNonOdrUse() != NOUR_Unevaluated) | ||||||||||
99 | return S.Diag(DRE->getBeginLoc(), | ||||||||||
100 | diag::err_param_default_argument_references_param) | ||||||||||
101 | << Param->getDeclName() << DefaultArg->getSourceRange(); | ||||||||||
102 | } else if (const auto *VDecl = dyn_cast<VarDecl>(Decl)) { | ||||||||||
103 | // C++ [dcl.fct.default]p7: | ||||||||||
104 | // Local variables shall not be used in default argument | ||||||||||
105 | // expressions. | ||||||||||
106 | // | ||||||||||
107 | // C++17 [dcl.fct.default]p7 (by CWG 2082): | ||||||||||
108 | // A local variable shall not appear as a potentially-evaluated | ||||||||||
109 | // expression in a default argument. | ||||||||||
110 | // | ||||||||||
111 | // C++20 [dcl.fct.default]p7 (DR as part of P0588R1, see also CWG 2346): | ||||||||||
112 | // Note: A local variable cannot be odr-used (6.3) in a default argument. | ||||||||||
113 | // | ||||||||||
114 | if (VDecl->isLocalVarDecl() && !DRE->isNonOdrUse()) | ||||||||||
115 | return S.Diag(DRE->getBeginLoc(), | ||||||||||
116 | diag::err_param_default_argument_references_local) | ||||||||||
117 | << VDecl->getDeclName() << DefaultArg->getSourceRange(); | ||||||||||
118 | } | ||||||||||
119 | |||||||||||
120 | return false; | ||||||||||
121 | } | ||||||||||
122 | |||||||||||
123 | /// VisitCXXThisExpr - Visit a C++ "this" expression. | ||||||||||
124 | bool CheckDefaultArgumentVisitor::VisitCXXThisExpr(const CXXThisExpr *ThisE) { | ||||||||||
125 | // C++ [dcl.fct.default]p8: | ||||||||||
126 | // The keyword this shall not be used in a default argument of a | ||||||||||
127 | // member function. | ||||||||||
128 | return S.Diag(ThisE->getBeginLoc(), | ||||||||||
129 | diag::err_param_default_argument_references_this) | ||||||||||
130 | << ThisE->getSourceRange(); | ||||||||||
131 | } | ||||||||||
132 | |||||||||||
133 | bool CheckDefaultArgumentVisitor::VisitPseudoObjectExpr( | ||||||||||
134 | const PseudoObjectExpr *POE) { | ||||||||||
135 | bool Invalid = false; | ||||||||||
136 | for (const Expr *E : POE->semantics()) { | ||||||||||
137 | // Look through bindings. | ||||||||||
138 | if (const auto *OVE = dyn_cast<OpaqueValueExpr>(E)) { | ||||||||||
139 | E = OVE->getSourceExpr(); | ||||||||||
140 | assert(E && "pseudo-object binding without source expression?")(static_cast <bool> (E && "pseudo-object binding without source expression?" ) ? void (0) : __assert_fail ("E && \"pseudo-object binding without source expression?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 140, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
141 | } | ||||||||||
142 | |||||||||||
143 | Invalid |= Visit(E); | ||||||||||
144 | } | ||||||||||
145 | return Invalid; | ||||||||||
146 | } | ||||||||||
147 | |||||||||||
148 | bool CheckDefaultArgumentVisitor::VisitLambdaExpr(const LambdaExpr *Lambda) { | ||||||||||
149 | // C++11 [expr.lambda.prim]p13: | ||||||||||
150 | // A lambda-expression appearing in a default argument shall not | ||||||||||
151 | // implicitly or explicitly capture any entity. | ||||||||||
152 | if (Lambda->capture_begin() == Lambda->capture_end()) | ||||||||||
153 | return false; | ||||||||||
154 | |||||||||||
155 | return S.Diag(Lambda->getBeginLoc(), diag::err_lambda_capture_default_arg); | ||||||||||
156 | } | ||||||||||
157 | } // namespace | ||||||||||
158 | |||||||||||
159 | void | ||||||||||
160 | Sema::ImplicitExceptionSpecification::CalledDecl(SourceLocation CallLoc, | ||||||||||
161 | const CXXMethodDecl *Method) { | ||||||||||
162 | // If we have an MSAny spec already, don't bother. | ||||||||||
163 | if (!Method || ComputedEST == EST_MSAny) | ||||||||||
164 | return; | ||||||||||
165 | |||||||||||
166 | const FunctionProtoType *Proto | ||||||||||
167 | = Method->getType()->getAs<FunctionProtoType>(); | ||||||||||
168 | Proto = Self->ResolveExceptionSpec(CallLoc, Proto); | ||||||||||
169 | if (!Proto) | ||||||||||
170 | return; | ||||||||||
171 | |||||||||||
172 | ExceptionSpecificationType EST = Proto->getExceptionSpecType(); | ||||||||||
173 | |||||||||||
174 | // If we have a throw-all spec at this point, ignore the function. | ||||||||||
175 | if (ComputedEST == EST_None) | ||||||||||
176 | return; | ||||||||||
177 | |||||||||||
178 | if (EST == EST_None && Method->hasAttr<NoThrowAttr>()) | ||||||||||
179 | EST = EST_BasicNoexcept; | ||||||||||
180 | |||||||||||
181 | switch (EST) { | ||||||||||
182 | case EST_Unparsed: | ||||||||||
183 | case EST_Uninstantiated: | ||||||||||
184 | case EST_Unevaluated: | ||||||||||
185 | llvm_unreachable("should not see unresolved exception specs here")::llvm::llvm_unreachable_internal("should not see unresolved exception specs here" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 185); | ||||||||||
186 | |||||||||||
187 | // If this function can throw any exceptions, make a note of that. | ||||||||||
188 | case EST_MSAny: | ||||||||||
189 | case EST_None: | ||||||||||
190 | // FIXME: Whichever we see last of MSAny and None determines our result. | ||||||||||
191 | // We should make a consistent, order-independent choice here. | ||||||||||
192 | ClearExceptions(); | ||||||||||
193 | ComputedEST = EST; | ||||||||||
194 | return; | ||||||||||
195 | case EST_NoexceptFalse: | ||||||||||
196 | ClearExceptions(); | ||||||||||
197 | ComputedEST = EST_None; | ||||||||||
198 | return; | ||||||||||
199 | // FIXME: If the call to this decl is using any of its default arguments, we | ||||||||||
200 | // need to search them for potentially-throwing calls. | ||||||||||
201 | // If this function has a basic noexcept, it doesn't affect the outcome. | ||||||||||
202 | case EST_BasicNoexcept: | ||||||||||
203 | case EST_NoexceptTrue: | ||||||||||
204 | case EST_NoThrow: | ||||||||||
205 | return; | ||||||||||
206 | // If we're still at noexcept(true) and there's a throw() callee, | ||||||||||
207 | // change to that specification. | ||||||||||
208 | case EST_DynamicNone: | ||||||||||
209 | if (ComputedEST == EST_BasicNoexcept) | ||||||||||
210 | ComputedEST = EST_DynamicNone; | ||||||||||
211 | return; | ||||||||||
212 | case EST_DependentNoexcept: | ||||||||||
213 | llvm_unreachable(::llvm::llvm_unreachable_internal("should not generate implicit declarations for dependent cases" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 214) | ||||||||||
214 | "should not generate implicit declarations for dependent cases")::llvm::llvm_unreachable_internal("should not generate implicit declarations for dependent cases" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 214); | ||||||||||
215 | case EST_Dynamic: | ||||||||||
216 | break; | ||||||||||
217 | } | ||||||||||
218 | assert(EST == EST_Dynamic && "EST case not considered earlier.")(static_cast <bool> (EST == EST_Dynamic && "EST case not considered earlier." ) ? void (0) : __assert_fail ("EST == EST_Dynamic && \"EST case not considered earlier.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 218, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
219 | assert(ComputedEST != EST_None &&(static_cast <bool> (ComputedEST != EST_None && "Shouldn't collect exceptions when throw-all is guaranteed." ) ? void (0) : __assert_fail ("ComputedEST != EST_None && \"Shouldn't collect exceptions when throw-all is guaranteed.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 220, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
220 | "Shouldn't collect exceptions when throw-all is guaranteed.")(static_cast <bool> (ComputedEST != EST_None && "Shouldn't collect exceptions when throw-all is guaranteed." ) ? void (0) : __assert_fail ("ComputedEST != EST_None && \"Shouldn't collect exceptions when throw-all is guaranteed.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 220, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
221 | ComputedEST = EST_Dynamic; | ||||||||||
222 | // Record the exceptions in this function's exception specification. | ||||||||||
223 | for (const auto &E : Proto->exceptions()) | ||||||||||
224 | if (ExceptionsSeen.insert(Self->Context.getCanonicalType(E)).second) | ||||||||||
225 | Exceptions.push_back(E); | ||||||||||
226 | } | ||||||||||
227 | |||||||||||
228 | void Sema::ImplicitExceptionSpecification::CalledStmt(Stmt *S) { | ||||||||||
229 | if (!S || ComputedEST == EST_MSAny) | ||||||||||
230 | return; | ||||||||||
231 | |||||||||||
232 | // FIXME: | ||||||||||
233 | // | ||||||||||
234 | // C++0x [except.spec]p14: | ||||||||||
235 | // [An] implicit exception-specification specifies the type-id T if and | ||||||||||
236 | // only if T is allowed by the exception-specification of a function directly | ||||||||||
237 | // invoked by f's implicit definition; f shall allow all exceptions if any | ||||||||||
238 | // function it directly invokes allows all exceptions, and f shall allow no | ||||||||||
239 | // exceptions if every function it directly invokes allows no exceptions. | ||||||||||
240 | // | ||||||||||
241 | // Note in particular that if an implicit exception-specification is generated | ||||||||||
242 | // for a function containing a throw-expression, that specification can still | ||||||||||
243 | // be noexcept(true). | ||||||||||
244 | // | ||||||||||
245 | // Note also that 'directly invoked' is not defined in the standard, and there | ||||||||||
246 | // is no indication that we should only consider potentially-evaluated calls. | ||||||||||
247 | // | ||||||||||
248 | // Ultimately we should implement the intent of the standard: the exception | ||||||||||
249 | // specification should be the set of exceptions which can be thrown by the | ||||||||||
250 | // implicit definition. For now, we assume that any non-nothrow expression can | ||||||||||
251 | // throw any exception. | ||||||||||
252 | |||||||||||
253 | if (Self->canThrow(S)) | ||||||||||
254 | ComputedEST = EST_None; | ||||||||||
255 | } | ||||||||||
256 | |||||||||||
257 | ExprResult Sema::ConvertParamDefaultArgument(ParmVarDecl *Param, Expr *Arg, | ||||||||||
258 | SourceLocation EqualLoc) { | ||||||||||
259 | if (RequireCompleteType(Param->getLocation(), Param->getType(), | ||||||||||
260 | diag::err_typecheck_decl_incomplete_type)) | ||||||||||
261 | return true; | ||||||||||
262 | |||||||||||
263 | // C++ [dcl.fct.default]p5 | ||||||||||
264 | // A default argument expression is implicitly converted (clause | ||||||||||
265 | // 4) to the parameter type. The default argument expression has | ||||||||||
266 | // the same semantic constraints as the initializer expression in | ||||||||||
267 | // a declaration of a variable of the parameter type, using the | ||||||||||
268 | // copy-initialization semantics (8.5). | ||||||||||
269 | InitializedEntity Entity = InitializedEntity::InitializeParameter(Context, | ||||||||||
270 | Param); | ||||||||||
271 | InitializationKind Kind = InitializationKind::CreateCopy(Param->getLocation(), | ||||||||||
272 | EqualLoc); | ||||||||||
273 | InitializationSequence InitSeq(*this, Entity, Kind, Arg); | ||||||||||
274 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Arg); | ||||||||||
275 | if (Result.isInvalid()) | ||||||||||
276 | return true; | ||||||||||
277 | Arg = Result.getAs<Expr>(); | ||||||||||
278 | |||||||||||
279 | CheckCompletedExpr(Arg, EqualLoc); | ||||||||||
280 | Arg = MaybeCreateExprWithCleanups(Arg); | ||||||||||
281 | |||||||||||
282 | return Arg; | ||||||||||
283 | } | ||||||||||
284 | |||||||||||
285 | void Sema::SetParamDefaultArgument(ParmVarDecl *Param, Expr *Arg, | ||||||||||
286 | SourceLocation EqualLoc) { | ||||||||||
287 | // Add the default argument to the parameter | ||||||||||
288 | Param->setDefaultArg(Arg); | ||||||||||
289 | |||||||||||
290 | // We have already instantiated this parameter; provide each of the | ||||||||||
291 | // instantiations with the uninstantiated default argument. | ||||||||||
292 | UnparsedDefaultArgInstantiationsMap::iterator InstPos | ||||||||||
293 | = UnparsedDefaultArgInstantiations.find(Param); | ||||||||||
294 | if (InstPos != UnparsedDefaultArgInstantiations.end()) { | ||||||||||
295 | for (unsigned I = 0, N = InstPos->second.size(); I != N; ++I) | ||||||||||
296 | InstPos->second[I]->setUninstantiatedDefaultArg(Arg); | ||||||||||
297 | |||||||||||
298 | // We're done tracking this parameter's instantiations. | ||||||||||
299 | UnparsedDefaultArgInstantiations.erase(InstPos); | ||||||||||
300 | } | ||||||||||
301 | } | ||||||||||
302 | |||||||||||
303 | /// ActOnParamDefaultArgument - Check whether the default argument | ||||||||||
304 | /// provided for a function parameter is well-formed. If so, attach it | ||||||||||
305 | /// to the parameter declaration. | ||||||||||
306 | void | ||||||||||
307 | Sema::ActOnParamDefaultArgument(Decl *param, SourceLocation EqualLoc, | ||||||||||
308 | Expr *DefaultArg) { | ||||||||||
309 | if (!param || !DefaultArg) | ||||||||||
310 | return; | ||||||||||
311 | |||||||||||
312 | ParmVarDecl *Param = cast<ParmVarDecl>(param); | ||||||||||
313 | UnparsedDefaultArgLocs.erase(Param); | ||||||||||
314 | |||||||||||
315 | auto Fail = [&] { | ||||||||||
316 | Param->setInvalidDecl(); | ||||||||||
317 | Param->setDefaultArg(new (Context) OpaqueValueExpr( | ||||||||||
318 | EqualLoc, Param->getType().getNonReferenceType(), VK_PRValue)); | ||||||||||
319 | }; | ||||||||||
320 | |||||||||||
321 | // Default arguments are only permitted in C++ | ||||||||||
322 | if (!getLangOpts().CPlusPlus) { | ||||||||||
323 | Diag(EqualLoc, diag::err_param_default_argument) | ||||||||||
324 | << DefaultArg->getSourceRange(); | ||||||||||
325 | return Fail(); | ||||||||||
326 | } | ||||||||||
327 | |||||||||||
328 | // Check for unexpanded parameter packs. | ||||||||||
329 | if (DiagnoseUnexpandedParameterPack(DefaultArg, UPPC_DefaultArgument)) { | ||||||||||
330 | return Fail(); | ||||||||||
331 | } | ||||||||||
332 | |||||||||||
333 | // C++11 [dcl.fct.default]p3 | ||||||||||
334 | // A default argument expression [...] shall not be specified for a | ||||||||||
335 | // parameter pack. | ||||||||||
336 | if (Param->isParameterPack()) { | ||||||||||
337 | Diag(EqualLoc, diag::err_param_default_argument_on_parameter_pack) | ||||||||||
338 | << DefaultArg->getSourceRange(); | ||||||||||
339 | // Recover by discarding the default argument. | ||||||||||
340 | Param->setDefaultArg(nullptr); | ||||||||||
341 | return; | ||||||||||
342 | } | ||||||||||
343 | |||||||||||
344 | ExprResult Result = ConvertParamDefaultArgument(Param, DefaultArg, EqualLoc); | ||||||||||
345 | if (Result.isInvalid()) | ||||||||||
346 | return Fail(); | ||||||||||
347 | |||||||||||
348 | DefaultArg = Result.getAs<Expr>(); | ||||||||||
349 | |||||||||||
350 | // Check that the default argument is well-formed | ||||||||||
351 | CheckDefaultArgumentVisitor DefaultArgChecker(*this, DefaultArg); | ||||||||||
352 | if (DefaultArgChecker.Visit(DefaultArg)) | ||||||||||
353 | return Fail(); | ||||||||||
354 | |||||||||||
355 | SetParamDefaultArgument(Param, DefaultArg, EqualLoc); | ||||||||||
356 | } | ||||||||||
357 | |||||||||||
358 | /// ActOnParamUnparsedDefaultArgument - We've seen a default | ||||||||||
359 | /// argument for a function parameter, but we can't parse it yet | ||||||||||
360 | /// because we're inside a class definition. Note that this default | ||||||||||
361 | /// argument will be parsed later. | ||||||||||
362 | void Sema::ActOnParamUnparsedDefaultArgument(Decl *param, | ||||||||||
363 | SourceLocation EqualLoc, | ||||||||||
364 | SourceLocation ArgLoc) { | ||||||||||
365 | if (!param) | ||||||||||
366 | return; | ||||||||||
367 | |||||||||||
368 | ParmVarDecl *Param = cast<ParmVarDecl>(param); | ||||||||||
369 | Param->setUnparsedDefaultArg(); | ||||||||||
370 | UnparsedDefaultArgLocs[Param] = ArgLoc; | ||||||||||
371 | } | ||||||||||
372 | |||||||||||
373 | /// ActOnParamDefaultArgumentError - Parsing or semantic analysis of | ||||||||||
374 | /// the default argument for the parameter param failed. | ||||||||||
375 | void Sema::ActOnParamDefaultArgumentError(Decl *param, | ||||||||||
376 | SourceLocation EqualLoc) { | ||||||||||
377 | if (!param) | ||||||||||
378 | return; | ||||||||||
379 | |||||||||||
380 | ParmVarDecl *Param = cast<ParmVarDecl>(param); | ||||||||||
381 | Param->setInvalidDecl(); | ||||||||||
382 | UnparsedDefaultArgLocs.erase(Param); | ||||||||||
383 | Param->setDefaultArg(new (Context) OpaqueValueExpr( | ||||||||||
384 | EqualLoc, Param->getType().getNonReferenceType(), VK_PRValue)); | ||||||||||
385 | } | ||||||||||
386 | |||||||||||
387 | /// CheckExtraCXXDefaultArguments - Check for any extra default | ||||||||||
388 | /// arguments in the declarator, which is not a function declaration | ||||||||||
389 | /// or definition and therefore is not permitted to have default | ||||||||||
390 | /// arguments. This routine should be invoked for every declarator | ||||||||||
391 | /// that is not a function declaration or definition. | ||||||||||
392 | void Sema::CheckExtraCXXDefaultArguments(Declarator &D) { | ||||||||||
393 | // C++ [dcl.fct.default]p3 | ||||||||||
394 | // A default argument expression shall be specified only in the | ||||||||||
395 | // parameter-declaration-clause of a function declaration or in a | ||||||||||
396 | // template-parameter (14.1). It shall not be specified for a | ||||||||||
397 | // parameter pack. If it is specified in a | ||||||||||
398 | // parameter-declaration-clause, it shall not occur within a | ||||||||||
399 | // declarator or abstract-declarator of a parameter-declaration. | ||||||||||
400 | bool MightBeFunction = D.isFunctionDeclarationContext(); | ||||||||||
401 | for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { | ||||||||||
402 | DeclaratorChunk &chunk = D.getTypeObject(i); | ||||||||||
403 | if (chunk.Kind == DeclaratorChunk::Function) { | ||||||||||
404 | if (MightBeFunction) { | ||||||||||
405 | // This is a function declaration. It can have default arguments, but | ||||||||||
406 | // keep looking in case its return type is a function type with default | ||||||||||
407 | // arguments. | ||||||||||
408 | MightBeFunction = false; | ||||||||||
409 | continue; | ||||||||||
410 | } | ||||||||||
411 | for (unsigned argIdx = 0, e = chunk.Fun.NumParams; argIdx != e; | ||||||||||
412 | ++argIdx) { | ||||||||||
413 | ParmVarDecl *Param = cast<ParmVarDecl>(chunk.Fun.Params[argIdx].Param); | ||||||||||
414 | if (Param->hasUnparsedDefaultArg()) { | ||||||||||
415 | std::unique_ptr<CachedTokens> Toks = | ||||||||||
416 | std::move(chunk.Fun.Params[argIdx].DefaultArgTokens); | ||||||||||
417 | SourceRange SR; | ||||||||||
418 | if (Toks->size() > 1) | ||||||||||
419 | SR = SourceRange((*Toks)[1].getLocation(), | ||||||||||
420 | Toks->back().getLocation()); | ||||||||||
421 | else | ||||||||||
422 | SR = UnparsedDefaultArgLocs[Param]; | ||||||||||
423 | Diag(Param->getLocation(), diag::err_param_default_argument_nonfunc) | ||||||||||
424 | << SR; | ||||||||||
425 | } else if (Param->getDefaultArg()) { | ||||||||||
426 | Diag(Param->getLocation(), diag::err_param_default_argument_nonfunc) | ||||||||||
427 | << Param->getDefaultArg()->getSourceRange(); | ||||||||||
428 | Param->setDefaultArg(nullptr); | ||||||||||
429 | } | ||||||||||
430 | } | ||||||||||
431 | } else if (chunk.Kind != DeclaratorChunk::Paren) { | ||||||||||
432 | MightBeFunction = false; | ||||||||||
433 | } | ||||||||||
434 | } | ||||||||||
435 | } | ||||||||||
436 | |||||||||||
437 | static bool functionDeclHasDefaultArgument(const FunctionDecl *FD) { | ||||||||||
438 | return std::any_of(FD->param_begin(), FD->param_end(), [](ParmVarDecl *P) { | ||||||||||
439 | return P->hasDefaultArg() && !P->hasInheritedDefaultArg(); | ||||||||||
440 | }); | ||||||||||
441 | } | ||||||||||
442 | |||||||||||
443 | /// MergeCXXFunctionDecl - Merge two declarations of the same C++ | ||||||||||
444 | /// function, once we already know that they have the same | ||||||||||
445 | /// type. Subroutine of MergeFunctionDecl. Returns true if there was an | ||||||||||
446 | /// error, false otherwise. | ||||||||||
447 | bool Sema::MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, | ||||||||||
448 | Scope *S) { | ||||||||||
449 | bool Invalid = false; | ||||||||||
450 | |||||||||||
451 | // The declaration context corresponding to the scope is the semantic | ||||||||||
452 | // parent, unless this is a local function declaration, in which case | ||||||||||
453 | // it is that surrounding function. | ||||||||||
454 | DeclContext *ScopeDC = New->isLocalExternDecl() | ||||||||||
455 | ? New->getLexicalDeclContext() | ||||||||||
456 | : New->getDeclContext(); | ||||||||||
457 | |||||||||||
458 | // Find the previous declaration for the purpose of default arguments. | ||||||||||
459 | FunctionDecl *PrevForDefaultArgs = Old; | ||||||||||
460 | for (/**/; PrevForDefaultArgs; | ||||||||||
461 | // Don't bother looking back past the latest decl if this is a local | ||||||||||
462 | // extern declaration; nothing else could work. | ||||||||||
463 | PrevForDefaultArgs = New->isLocalExternDecl() | ||||||||||
464 | ? nullptr | ||||||||||
465 | : PrevForDefaultArgs->getPreviousDecl()) { | ||||||||||
466 | // Ignore hidden declarations. | ||||||||||
467 | if (!LookupResult::isVisible(*this, PrevForDefaultArgs)) | ||||||||||
468 | continue; | ||||||||||
469 | |||||||||||
470 | if (S && !isDeclInScope(PrevForDefaultArgs, ScopeDC, S) && | ||||||||||
471 | !New->isCXXClassMember()) { | ||||||||||
472 | // Ignore default arguments of old decl if they are not in | ||||||||||
473 | // the same scope and this is not an out-of-line definition of | ||||||||||
474 | // a member function. | ||||||||||
475 | continue; | ||||||||||
476 | } | ||||||||||
477 | |||||||||||
478 | if (PrevForDefaultArgs->isLocalExternDecl() != New->isLocalExternDecl()) { | ||||||||||
479 | // If only one of these is a local function declaration, then they are | ||||||||||
480 | // declared in different scopes, even though isDeclInScope may think | ||||||||||
481 | // they're in the same scope. (If both are local, the scope check is | ||||||||||
482 | // sufficient, and if neither is local, then they are in the same scope.) | ||||||||||
483 | continue; | ||||||||||
484 | } | ||||||||||
485 | |||||||||||
486 | // We found the right previous declaration. | ||||||||||
487 | break; | ||||||||||
488 | } | ||||||||||
489 | |||||||||||
490 | // C++ [dcl.fct.default]p4: | ||||||||||
491 | // For non-template functions, default arguments can be added in | ||||||||||
492 | // later declarations of a function in the same | ||||||||||
493 | // scope. Declarations in different scopes have completely | ||||||||||
494 | // distinct sets of default arguments. That is, declarations in | ||||||||||
495 | // inner scopes do not acquire default arguments from | ||||||||||
496 | // declarations in outer scopes, and vice versa. In a given | ||||||||||
497 | // function declaration, all parameters subsequent to a | ||||||||||
498 | // parameter with a default argument shall have default | ||||||||||
499 | // arguments supplied in this or previous declarations. A | ||||||||||
500 | // default argument shall not be redefined by a later | ||||||||||
501 | // declaration (not even to the same value). | ||||||||||
502 | // | ||||||||||
503 | // C++ [dcl.fct.default]p6: | ||||||||||
504 | // Except for member functions of class templates, the default arguments | ||||||||||
505 | // in a member function definition that appears outside of the class | ||||||||||
506 | // definition are added to the set of default arguments provided by the | ||||||||||
507 | // member function declaration in the class definition. | ||||||||||
508 | for (unsigned p = 0, NumParams = PrevForDefaultArgs | ||||||||||
509 | ? PrevForDefaultArgs->getNumParams() | ||||||||||
510 | : 0; | ||||||||||
511 | p < NumParams; ++p) { | ||||||||||
512 | ParmVarDecl *OldParam = PrevForDefaultArgs->getParamDecl(p); | ||||||||||
513 | ParmVarDecl *NewParam = New->getParamDecl(p); | ||||||||||
514 | |||||||||||
515 | bool OldParamHasDfl = OldParam ? OldParam->hasDefaultArg() : false; | ||||||||||
516 | bool NewParamHasDfl = NewParam->hasDefaultArg(); | ||||||||||
517 | |||||||||||
518 | if (OldParamHasDfl && NewParamHasDfl) { | ||||||||||
519 | unsigned DiagDefaultParamID = | ||||||||||
520 | diag::err_param_default_argument_redefinition; | ||||||||||
521 | |||||||||||
522 | // MSVC accepts that default parameters be redefined for member functions | ||||||||||
523 | // of template class. The new default parameter's value is ignored. | ||||||||||
524 | Invalid = true; | ||||||||||
525 | if (getLangOpts().MicrosoftExt) { | ||||||||||
526 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(New); | ||||||||||
527 | if (MD && MD->getParent()->getDescribedClassTemplate()) { | ||||||||||
528 | // Merge the old default argument into the new parameter. | ||||||||||
529 | NewParam->setHasInheritedDefaultArg(); | ||||||||||
530 | if (OldParam->hasUninstantiatedDefaultArg()) | ||||||||||
531 | NewParam->setUninstantiatedDefaultArg( | ||||||||||
532 | OldParam->getUninstantiatedDefaultArg()); | ||||||||||
533 | else | ||||||||||
534 | NewParam->setDefaultArg(OldParam->getInit()); | ||||||||||
535 | DiagDefaultParamID = diag::ext_param_default_argument_redefinition; | ||||||||||
536 | Invalid = false; | ||||||||||
537 | } | ||||||||||
538 | } | ||||||||||
539 | |||||||||||
540 | // FIXME: If we knew where the '=' was, we could easily provide a fix-it | ||||||||||
541 | // hint here. Alternatively, we could walk the type-source information | ||||||||||
542 | // for NewParam to find the last source location in the type... but it | ||||||||||
543 | // isn't worth the effort right now. This is the kind of test case that | ||||||||||
544 | // is hard to get right: | ||||||||||
545 | // int f(int); | ||||||||||
546 | // void g(int (*fp)(int) = f); | ||||||||||
547 | // void g(int (*fp)(int) = &f); | ||||||||||
548 | Diag(NewParam->getLocation(), DiagDefaultParamID) | ||||||||||
549 | << NewParam->getDefaultArgRange(); | ||||||||||
550 | |||||||||||
551 | // Look for the function declaration where the default argument was | ||||||||||
552 | // actually written, which may be a declaration prior to Old. | ||||||||||
553 | for (auto Older = PrevForDefaultArgs; | ||||||||||
554 | OldParam->hasInheritedDefaultArg(); /**/) { | ||||||||||
555 | Older = Older->getPreviousDecl(); | ||||||||||
556 | OldParam = Older->getParamDecl(p); | ||||||||||
557 | } | ||||||||||
558 | |||||||||||
559 | Diag(OldParam->getLocation(), diag::note_previous_definition) | ||||||||||
560 | << OldParam->getDefaultArgRange(); | ||||||||||
561 | } else if (OldParamHasDfl) { | ||||||||||
562 | // Merge the old default argument into the new parameter unless the new | ||||||||||
563 | // function is a friend declaration in a template class. In the latter | ||||||||||
564 | // case the default arguments will be inherited when the friend | ||||||||||
565 | // declaration will be instantiated. | ||||||||||
566 | if (New->getFriendObjectKind() == Decl::FOK_None || | ||||||||||
567 | !New->getLexicalDeclContext()->isDependentContext()) { | ||||||||||
568 | // It's important to use getInit() here; getDefaultArg() | ||||||||||
569 | // strips off any top-level ExprWithCleanups. | ||||||||||
570 | NewParam->setHasInheritedDefaultArg(); | ||||||||||
571 | if (OldParam->hasUnparsedDefaultArg()) | ||||||||||
572 | NewParam->setUnparsedDefaultArg(); | ||||||||||
573 | else if (OldParam->hasUninstantiatedDefaultArg()) | ||||||||||
574 | NewParam->setUninstantiatedDefaultArg( | ||||||||||
575 | OldParam->getUninstantiatedDefaultArg()); | ||||||||||
576 | else | ||||||||||
577 | NewParam->setDefaultArg(OldParam->getInit()); | ||||||||||
578 | } | ||||||||||
579 | } else if (NewParamHasDfl) { | ||||||||||
580 | if (New->getDescribedFunctionTemplate()) { | ||||||||||
581 | // Paragraph 4, quoted above, only applies to non-template functions. | ||||||||||
582 | Diag(NewParam->getLocation(), | ||||||||||
583 | diag::err_param_default_argument_template_redecl) | ||||||||||
584 | << NewParam->getDefaultArgRange(); | ||||||||||
585 | Diag(PrevForDefaultArgs->getLocation(), | ||||||||||
586 | diag::note_template_prev_declaration) | ||||||||||
587 | << false; | ||||||||||
588 | } else if (New->getTemplateSpecializationKind() | ||||||||||
589 | != TSK_ImplicitInstantiation && | ||||||||||
590 | New->getTemplateSpecializationKind() != TSK_Undeclared) { | ||||||||||
591 | // C++ [temp.expr.spec]p21: | ||||||||||
592 | // Default function arguments shall not be specified in a declaration | ||||||||||
593 | // or a definition for one of the following explicit specializations: | ||||||||||
594 | // - the explicit specialization of a function template; | ||||||||||
595 | // - the explicit specialization of a member function template; | ||||||||||
596 | // - the explicit specialization of a member function of a class | ||||||||||
597 | // template where the class template specialization to which the | ||||||||||
598 | // member function specialization belongs is implicitly | ||||||||||
599 | // instantiated. | ||||||||||
600 | Diag(NewParam->getLocation(), diag::err_template_spec_default_arg) | ||||||||||
601 | << (New->getTemplateSpecializationKind() ==TSK_ExplicitSpecialization) | ||||||||||
602 | << New->getDeclName() | ||||||||||
603 | << NewParam->getDefaultArgRange(); | ||||||||||
604 | } else if (New->getDeclContext()->isDependentContext()) { | ||||||||||
605 | // C++ [dcl.fct.default]p6 (DR217): | ||||||||||
606 | // Default arguments for a member function of a class template shall | ||||||||||
607 | // be specified on the initial declaration of the member function | ||||||||||
608 | // within the class template. | ||||||||||
609 | // | ||||||||||
610 | // Reading the tea leaves a bit in DR217 and its reference to DR205 | ||||||||||
611 | // leads me to the conclusion that one cannot add default function | ||||||||||
612 | // arguments for an out-of-line definition of a member function of a | ||||||||||
613 | // dependent type. | ||||||||||
614 | int WhichKind = 2; | ||||||||||
615 | if (CXXRecordDecl *Record | ||||||||||
616 | = dyn_cast<CXXRecordDecl>(New->getDeclContext())) { | ||||||||||
617 | if (Record->getDescribedClassTemplate()) | ||||||||||
618 | WhichKind = 0; | ||||||||||
619 | else if (isa<ClassTemplatePartialSpecializationDecl>(Record)) | ||||||||||
620 | WhichKind = 1; | ||||||||||
621 | else | ||||||||||
622 | WhichKind = 2; | ||||||||||
623 | } | ||||||||||
624 | |||||||||||
625 | Diag(NewParam->getLocation(), | ||||||||||
626 | diag::err_param_default_argument_member_template_redecl) | ||||||||||
627 | << WhichKind | ||||||||||
628 | << NewParam->getDefaultArgRange(); | ||||||||||
629 | } | ||||||||||
630 | } | ||||||||||
631 | } | ||||||||||
632 | |||||||||||
633 | // DR1344: If a default argument is added outside a class definition and that | ||||||||||
634 | // default argument makes the function a special member function, the program | ||||||||||
635 | // is ill-formed. This can only happen for constructors. | ||||||||||
636 | if (isa<CXXConstructorDecl>(New) && | ||||||||||
637 | New->getMinRequiredArguments() < Old->getMinRequiredArguments()) { | ||||||||||
638 | CXXSpecialMember NewSM = getSpecialMember(cast<CXXMethodDecl>(New)), | ||||||||||
639 | OldSM = getSpecialMember(cast<CXXMethodDecl>(Old)); | ||||||||||
640 | if (NewSM != OldSM) { | ||||||||||
641 | ParmVarDecl *NewParam = New->getParamDecl(New->getMinRequiredArguments()); | ||||||||||
642 | assert(NewParam->hasDefaultArg())(static_cast <bool> (NewParam->hasDefaultArg()) ? void (0) : __assert_fail ("NewParam->hasDefaultArg()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 642, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
643 | Diag(NewParam->getLocation(), diag::err_default_arg_makes_ctor_special) | ||||||||||
644 | << NewParam->getDefaultArgRange() << NewSM; | ||||||||||
645 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||||||
646 | } | ||||||||||
647 | } | ||||||||||
648 | |||||||||||
649 | const FunctionDecl *Def; | ||||||||||
650 | // C++11 [dcl.constexpr]p1: If any declaration of a function or function | ||||||||||
651 | // template has a constexpr specifier then all its declarations shall | ||||||||||
652 | // contain the constexpr specifier. | ||||||||||
653 | if (New->getConstexprKind() != Old->getConstexprKind()) { | ||||||||||
654 | Diag(New->getLocation(), diag::err_constexpr_redecl_mismatch) | ||||||||||
655 | << New << static_cast<int>(New->getConstexprKind()) | ||||||||||
656 | << static_cast<int>(Old->getConstexprKind()); | ||||||||||
657 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||||||
658 | Invalid = true; | ||||||||||
659 | } else if (!Old->getMostRecentDecl()->isInlined() && New->isInlined() && | ||||||||||
660 | Old->isDefined(Def) && | ||||||||||
661 | // If a friend function is inlined but does not have 'inline' | ||||||||||
662 | // specifier, it is a definition. Do not report attribute conflict | ||||||||||
663 | // in this case, redefinition will be diagnosed later. | ||||||||||
664 | (New->isInlineSpecified() || | ||||||||||
665 | New->getFriendObjectKind() == Decl::FOK_None)) { | ||||||||||
666 | // C++11 [dcl.fcn.spec]p4: | ||||||||||
667 | // If the definition of a function appears in a translation unit before its | ||||||||||
668 | // first declaration as inline, the program is ill-formed. | ||||||||||
669 | Diag(New->getLocation(), diag::err_inline_decl_follows_def) << New; | ||||||||||
670 | Diag(Def->getLocation(), diag::note_previous_definition); | ||||||||||
671 | Invalid = true; | ||||||||||
672 | } | ||||||||||
673 | |||||||||||
674 | // C++17 [temp.deduct.guide]p3: | ||||||||||
675 | // Two deduction guide declarations in the same translation unit | ||||||||||
676 | // for the same class template shall not have equivalent | ||||||||||
677 | // parameter-declaration-clauses. | ||||||||||
678 | if (isa<CXXDeductionGuideDecl>(New) && | ||||||||||
679 | !New->isFunctionTemplateSpecialization() && isVisible(Old)) { | ||||||||||
680 | Diag(New->getLocation(), diag::err_deduction_guide_redeclared); | ||||||||||
681 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||||||
682 | } | ||||||||||
683 | |||||||||||
684 | // C++11 [dcl.fct.default]p4: If a friend declaration specifies a default | ||||||||||
685 | // argument expression, that declaration shall be a definition and shall be | ||||||||||
686 | // the only declaration of the function or function template in the | ||||||||||
687 | // translation unit. | ||||||||||
688 | if (Old->getFriendObjectKind() == Decl::FOK_Undeclared && | ||||||||||
689 | functionDeclHasDefaultArgument(Old)) { | ||||||||||
690 | Diag(New->getLocation(), diag::err_friend_decl_with_def_arg_redeclared); | ||||||||||
691 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||||||
692 | Invalid = true; | ||||||||||
693 | } | ||||||||||
694 | |||||||||||
695 | // C++11 [temp.friend]p4 (DR329): | ||||||||||
696 | // When a function is defined in a friend function declaration in a class | ||||||||||
697 | // template, the function is instantiated when the function is odr-used. | ||||||||||
698 | // The same restrictions on multiple declarations and definitions that | ||||||||||
699 | // apply to non-template function declarations and definitions also apply | ||||||||||
700 | // to these implicit definitions. | ||||||||||
701 | const FunctionDecl *OldDefinition = nullptr; | ||||||||||
702 | if (New->isThisDeclarationInstantiatedFromAFriendDefinition() && | ||||||||||
703 | Old->isDefined(OldDefinition, true)) | ||||||||||
704 | CheckForFunctionRedefinition(New, OldDefinition); | ||||||||||
705 | |||||||||||
706 | return Invalid; | ||||||||||
707 | } | ||||||||||
708 | |||||||||||
709 | NamedDecl * | ||||||||||
710 | Sema::ActOnDecompositionDeclarator(Scope *S, Declarator &D, | ||||||||||
711 | MultiTemplateParamsArg TemplateParamLists) { | ||||||||||
712 | assert(D.isDecompositionDeclarator())(static_cast <bool> (D.isDecompositionDeclarator()) ? void (0) : __assert_fail ("D.isDecompositionDeclarator()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 712, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
713 | const DecompositionDeclarator &Decomp = D.getDecompositionDeclarator(); | ||||||||||
714 | |||||||||||
715 | // The syntax only allows a decomposition declarator as a simple-declaration, | ||||||||||
716 | // a for-range-declaration, or a condition in Clang, but we parse it in more | ||||||||||
717 | // cases than that. | ||||||||||
718 | if (!D.mayHaveDecompositionDeclarator()) { | ||||||||||
719 | Diag(Decomp.getLSquareLoc(), diag::err_decomp_decl_context) | ||||||||||
720 | << Decomp.getSourceRange(); | ||||||||||
721 | return nullptr; | ||||||||||
722 | } | ||||||||||
723 | |||||||||||
724 | if (!TemplateParamLists.empty()) { | ||||||||||
725 | // FIXME: There's no rule against this, but there are also no rules that | ||||||||||
726 | // would actually make it usable, so we reject it for now. | ||||||||||
727 | Diag(TemplateParamLists.front()->getTemplateLoc(), | ||||||||||
728 | diag::err_decomp_decl_template); | ||||||||||
729 | return nullptr; | ||||||||||
730 | } | ||||||||||
731 | |||||||||||
732 | Diag(Decomp.getLSquareLoc(), | ||||||||||
733 | !getLangOpts().CPlusPlus17 | ||||||||||
734 | ? diag::ext_decomp_decl | ||||||||||
735 | : D.getContext() == DeclaratorContext::Condition | ||||||||||
736 | ? diag::ext_decomp_decl_cond | ||||||||||
737 | : diag::warn_cxx14_compat_decomp_decl) | ||||||||||
738 | << Decomp.getSourceRange(); | ||||||||||
739 | |||||||||||
740 | // The semantic context is always just the current context. | ||||||||||
741 | DeclContext *const DC = CurContext; | ||||||||||
742 | |||||||||||
743 | // C++17 [dcl.dcl]/8: | ||||||||||
744 | // The decl-specifier-seq shall contain only the type-specifier auto | ||||||||||
745 | // and cv-qualifiers. | ||||||||||
746 | // C++2a [dcl.dcl]/8: | ||||||||||
747 | // If decl-specifier-seq contains any decl-specifier other than static, | ||||||||||
748 | // thread_local, auto, or cv-qualifiers, the program is ill-formed. | ||||||||||
749 | auto &DS = D.getDeclSpec(); | ||||||||||
750 | { | ||||||||||
751 | SmallVector<StringRef, 8> BadSpecifiers; | ||||||||||
752 | SmallVector<SourceLocation, 8> BadSpecifierLocs; | ||||||||||
753 | SmallVector<StringRef, 8> CPlusPlus20Specifiers; | ||||||||||
754 | SmallVector<SourceLocation, 8> CPlusPlus20SpecifierLocs; | ||||||||||
755 | if (auto SCS = DS.getStorageClassSpec()) { | ||||||||||
756 | if (SCS == DeclSpec::SCS_static) { | ||||||||||
757 | CPlusPlus20Specifiers.push_back(DeclSpec::getSpecifierName(SCS)); | ||||||||||
758 | CPlusPlus20SpecifierLocs.push_back(DS.getStorageClassSpecLoc()); | ||||||||||
759 | } else { | ||||||||||
760 | BadSpecifiers.push_back(DeclSpec::getSpecifierName(SCS)); | ||||||||||
761 | BadSpecifierLocs.push_back(DS.getStorageClassSpecLoc()); | ||||||||||
762 | } | ||||||||||
763 | } | ||||||||||
764 | if (auto TSCS = DS.getThreadStorageClassSpec()) { | ||||||||||
765 | CPlusPlus20Specifiers.push_back(DeclSpec::getSpecifierName(TSCS)); | ||||||||||
766 | CPlusPlus20SpecifierLocs.push_back(DS.getThreadStorageClassSpecLoc()); | ||||||||||
767 | } | ||||||||||
768 | if (DS.hasConstexprSpecifier()) { | ||||||||||
769 | BadSpecifiers.push_back( | ||||||||||
770 | DeclSpec::getSpecifierName(DS.getConstexprSpecifier())); | ||||||||||
771 | BadSpecifierLocs.push_back(DS.getConstexprSpecLoc()); | ||||||||||
772 | } | ||||||||||
773 | if (DS.isInlineSpecified()) { | ||||||||||
774 | BadSpecifiers.push_back("inline"); | ||||||||||
775 | BadSpecifierLocs.push_back(DS.getInlineSpecLoc()); | ||||||||||
776 | } | ||||||||||
777 | if (!BadSpecifiers.empty()) { | ||||||||||
778 | auto &&Err = Diag(BadSpecifierLocs.front(), diag::err_decomp_decl_spec); | ||||||||||
779 | Err << (int)BadSpecifiers.size() | ||||||||||
780 | << llvm::join(BadSpecifiers.begin(), BadSpecifiers.end(), " "); | ||||||||||
781 | // Don't add FixItHints to remove the specifiers; we do still respect | ||||||||||
782 | // them when building the underlying variable. | ||||||||||
783 | for (auto Loc : BadSpecifierLocs) | ||||||||||
784 | Err << SourceRange(Loc, Loc); | ||||||||||
785 | } else if (!CPlusPlus20Specifiers.empty()) { | ||||||||||
786 | auto &&Warn = Diag(CPlusPlus20SpecifierLocs.front(), | ||||||||||
787 | getLangOpts().CPlusPlus20 | ||||||||||
788 | ? diag::warn_cxx17_compat_decomp_decl_spec | ||||||||||
789 | : diag::ext_decomp_decl_spec); | ||||||||||
790 | Warn << (int)CPlusPlus20Specifiers.size() | ||||||||||
791 | << llvm::join(CPlusPlus20Specifiers.begin(), | ||||||||||
792 | CPlusPlus20Specifiers.end(), " "); | ||||||||||
793 | for (auto Loc : CPlusPlus20SpecifierLocs) | ||||||||||
794 | Warn << SourceRange(Loc, Loc); | ||||||||||
795 | } | ||||||||||
796 | // We can't recover from it being declared as a typedef. | ||||||||||
797 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||||||||
798 | return nullptr; | ||||||||||
799 | } | ||||||||||
800 | |||||||||||
801 | // C++2a [dcl.struct.bind]p1: | ||||||||||
802 | // A cv that includes volatile is deprecated | ||||||||||
803 | if ((DS.getTypeQualifiers() & DeclSpec::TQ_volatile) && | ||||||||||
804 | getLangOpts().CPlusPlus20) | ||||||||||
805 | Diag(DS.getVolatileSpecLoc(), | ||||||||||
806 | diag::warn_deprecated_volatile_structured_binding); | ||||||||||
807 | |||||||||||
808 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||||||
809 | QualType R = TInfo->getType(); | ||||||||||
810 | |||||||||||
811 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||||||
812 | UPPC_DeclarationType)) | ||||||||||
813 | D.setInvalidType(); | ||||||||||
814 | |||||||||||
815 | // The syntax only allows a single ref-qualifier prior to the decomposition | ||||||||||
816 | // declarator. No other declarator chunks are permitted. Also check the type | ||||||||||
817 | // specifier here. | ||||||||||
818 | if (DS.getTypeSpecType() != DeclSpec::TST_auto || | ||||||||||
819 | D.hasGroupingParens() || D.getNumTypeObjects() > 1 || | ||||||||||
820 | (D.getNumTypeObjects() == 1 && | ||||||||||
821 | D.getTypeObject(0).Kind != DeclaratorChunk::Reference)) { | ||||||||||
822 | Diag(Decomp.getLSquareLoc(), | ||||||||||
823 | (D.hasGroupingParens() || | ||||||||||
824 | (D.getNumTypeObjects() && | ||||||||||
825 | D.getTypeObject(0).Kind == DeclaratorChunk::Paren)) | ||||||||||
826 | ? diag::err_decomp_decl_parens | ||||||||||
827 | : diag::err_decomp_decl_type) | ||||||||||
828 | << R; | ||||||||||
829 | |||||||||||
830 | // In most cases, there's no actual problem with an explicitly-specified | ||||||||||
831 | // type, but a function type won't work here, and ActOnVariableDeclarator | ||||||||||
832 | // shouldn't be called for such a type. | ||||||||||
833 | if (R->isFunctionType()) | ||||||||||
834 | D.setInvalidType(); | ||||||||||
835 | } | ||||||||||
836 | |||||||||||
837 | // Build the BindingDecls. | ||||||||||
838 | SmallVector<BindingDecl*, 8> Bindings; | ||||||||||
839 | |||||||||||
840 | // Build the BindingDecls. | ||||||||||
841 | for (auto &B : D.getDecompositionDeclarator().bindings()) { | ||||||||||
842 | // Check for name conflicts. | ||||||||||
843 | DeclarationNameInfo NameInfo(B.Name, B.NameLoc); | ||||||||||
844 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||||||
845 | ForVisibleRedeclaration); | ||||||||||
846 | LookupName(Previous, S, | ||||||||||
847 | /*CreateBuiltins*/DC->getRedeclContext()->isTranslationUnit()); | ||||||||||
848 | |||||||||||
849 | // It's not permitted to shadow a template parameter name. | ||||||||||
850 | if (Previous.isSingleResult() && | ||||||||||
851 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||||||
852 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), | ||||||||||
853 | Previous.getFoundDecl()); | ||||||||||
854 | Previous.clear(); | ||||||||||
855 | } | ||||||||||
856 | |||||||||||
857 | auto *BD = BindingDecl::Create(Context, DC, B.NameLoc, B.Name); | ||||||||||
858 | |||||||||||
859 | // Find the shadowed declaration before filtering for scope. | ||||||||||
860 | NamedDecl *ShadowedDecl = D.getCXXScopeSpec().isEmpty() | ||||||||||
861 | ? getShadowedDeclaration(BD, Previous) | ||||||||||
862 | : nullptr; | ||||||||||
863 | |||||||||||
864 | bool ConsiderLinkage = DC->isFunctionOrMethod() && | ||||||||||
865 | DS.getStorageClassSpec() == DeclSpec::SCS_extern; | ||||||||||
866 | FilterLookupForScope(Previous, DC, S, ConsiderLinkage, | ||||||||||
867 | /*AllowInlineNamespace*/false); | ||||||||||
868 | |||||||||||
869 | if (!Previous.empty()) { | ||||||||||
870 | auto *Old = Previous.getRepresentativeDecl(); | ||||||||||
871 | Diag(B.NameLoc, diag::err_redefinition) << B.Name; | ||||||||||
872 | Diag(Old->getLocation(), diag::note_previous_definition); | ||||||||||
873 | } else if (ShadowedDecl && !D.isRedeclaration()) { | ||||||||||
874 | CheckShadow(BD, ShadowedDecl, Previous); | ||||||||||
875 | } | ||||||||||
876 | PushOnScopeChains(BD, S, true); | ||||||||||
877 | Bindings.push_back(BD); | ||||||||||
878 | ParsingInitForAutoVars.insert(BD); | ||||||||||
879 | } | ||||||||||
880 | |||||||||||
881 | // There are no prior lookup results for the variable itself, because it | ||||||||||
882 | // is unnamed. | ||||||||||
883 | DeclarationNameInfo NameInfo((IdentifierInfo *)nullptr, | ||||||||||
884 | Decomp.getLSquareLoc()); | ||||||||||
885 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||||||
886 | ForVisibleRedeclaration); | ||||||||||
887 | |||||||||||
888 | // Build the variable that holds the non-decomposed object. | ||||||||||
889 | bool AddToScope = true; | ||||||||||
890 | NamedDecl *New = | ||||||||||
891 | ActOnVariableDeclarator(S, D, DC, TInfo, Previous, | ||||||||||
892 | MultiTemplateParamsArg(), AddToScope, Bindings); | ||||||||||
893 | if (AddToScope) { | ||||||||||
894 | S->AddDecl(New); | ||||||||||
895 | CurContext->addHiddenDecl(New); | ||||||||||
896 | } | ||||||||||
897 | |||||||||||
898 | if (isInOpenMPDeclareTargetContext()) | ||||||||||
899 | checkDeclIsAllowedInOpenMPTarget(nullptr, New); | ||||||||||
900 | |||||||||||
901 | return New; | ||||||||||
902 | } | ||||||||||
903 | |||||||||||
904 | static bool checkSimpleDecomposition( | ||||||||||
905 | Sema &S, ArrayRef<BindingDecl *> Bindings, ValueDecl *Src, | ||||||||||
906 | QualType DecompType, const llvm::APSInt &NumElems, QualType ElemType, | ||||||||||
907 | llvm::function_ref<ExprResult(SourceLocation, Expr *, unsigned)> GetInit) { | ||||||||||
908 | if ((int64_t)Bindings.size() != NumElems) { | ||||||||||
909 | S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings) | ||||||||||
910 | << DecompType << (unsigned)Bindings.size() | ||||||||||
911 | << (unsigned)NumElems.getLimitedValue(UINT_MAX(2147483647 *2U +1U)) | ||||||||||
912 | << toString(NumElems, 10) << (NumElems < Bindings.size()); | ||||||||||
913 | return true; | ||||||||||
914 | } | ||||||||||
915 | |||||||||||
916 | unsigned I = 0; | ||||||||||
917 | for (auto *B : Bindings) { | ||||||||||
918 | SourceLocation Loc = B->getLocation(); | ||||||||||
919 | ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc); | ||||||||||
920 | if (E.isInvalid()) | ||||||||||
921 | return true; | ||||||||||
922 | E = GetInit(Loc, E.get(), I++); | ||||||||||
923 | if (E.isInvalid()) | ||||||||||
924 | return true; | ||||||||||
925 | B->setBinding(ElemType, E.get()); | ||||||||||
926 | } | ||||||||||
927 | |||||||||||
928 | return false; | ||||||||||
929 | } | ||||||||||
930 | |||||||||||
931 | static bool checkArrayLikeDecomposition(Sema &S, | ||||||||||
932 | ArrayRef<BindingDecl *> Bindings, | ||||||||||
933 | ValueDecl *Src, QualType DecompType, | ||||||||||
934 | const llvm::APSInt &NumElems, | ||||||||||
935 | QualType ElemType) { | ||||||||||
936 | return checkSimpleDecomposition( | ||||||||||
937 | S, Bindings, Src, DecompType, NumElems, ElemType, | ||||||||||
938 | [&](SourceLocation Loc, Expr *Base, unsigned I) -> ExprResult { | ||||||||||
939 | ExprResult E = S.ActOnIntegerConstant(Loc, I); | ||||||||||
940 | if (E.isInvalid()) | ||||||||||
941 | return ExprError(); | ||||||||||
942 | return S.CreateBuiltinArraySubscriptExpr(Base, Loc, E.get(), Loc); | ||||||||||
943 | }); | ||||||||||
944 | } | ||||||||||
945 | |||||||||||
946 | static bool checkArrayDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings, | ||||||||||
947 | ValueDecl *Src, QualType DecompType, | ||||||||||
948 | const ConstantArrayType *CAT) { | ||||||||||
949 | return checkArrayLikeDecomposition(S, Bindings, Src, DecompType, | ||||||||||
950 | llvm::APSInt(CAT->getSize()), | ||||||||||
951 | CAT->getElementType()); | ||||||||||
952 | } | ||||||||||
953 | |||||||||||
954 | static bool checkVectorDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings, | ||||||||||
955 | ValueDecl *Src, QualType DecompType, | ||||||||||
956 | const VectorType *VT) { | ||||||||||
957 | return checkArrayLikeDecomposition( | ||||||||||
958 | S, Bindings, Src, DecompType, llvm::APSInt::get(VT->getNumElements()), | ||||||||||
959 | S.Context.getQualifiedType(VT->getElementType(), | ||||||||||
960 | DecompType.getQualifiers())); | ||||||||||
961 | } | ||||||||||
962 | |||||||||||
963 | static bool checkComplexDecomposition(Sema &S, | ||||||||||
964 | ArrayRef<BindingDecl *> Bindings, | ||||||||||
965 | ValueDecl *Src, QualType DecompType, | ||||||||||
966 | const ComplexType *CT) { | ||||||||||
967 | return checkSimpleDecomposition( | ||||||||||
968 | S, Bindings, Src, DecompType, llvm::APSInt::get(2), | ||||||||||
969 | S.Context.getQualifiedType(CT->getElementType(), | ||||||||||
970 | DecompType.getQualifiers()), | ||||||||||
971 | [&](SourceLocation Loc, Expr *Base, unsigned I) -> ExprResult { | ||||||||||
972 | return S.CreateBuiltinUnaryOp(Loc, I ? UO_Imag : UO_Real, Base); | ||||||||||
973 | }); | ||||||||||
974 | } | ||||||||||
975 | |||||||||||
976 | static std::string printTemplateArgs(const PrintingPolicy &PrintingPolicy, | ||||||||||
977 | TemplateArgumentListInfo &Args, | ||||||||||
978 | const TemplateParameterList *Params) { | ||||||||||
979 | SmallString<128> SS; | ||||||||||
980 | llvm::raw_svector_ostream OS(SS); | ||||||||||
981 | bool First = true; | ||||||||||
982 | unsigned I = 0; | ||||||||||
983 | for (auto &Arg : Args.arguments()) { | ||||||||||
984 | if (!First) | ||||||||||
985 | OS << ", "; | ||||||||||
986 | Arg.getArgument().print( | ||||||||||
987 | PrintingPolicy, OS, | ||||||||||
988 | TemplateParameterList::shouldIncludeTypeForArgument(Params, I)); | ||||||||||
989 | First = false; | ||||||||||
990 | I++; | ||||||||||
991 | } | ||||||||||
992 | return std::string(OS.str()); | ||||||||||
993 | } | ||||||||||
994 | |||||||||||
995 | static bool lookupStdTypeTraitMember(Sema &S, LookupResult &TraitMemberLookup, | ||||||||||
996 | SourceLocation Loc, StringRef Trait, | ||||||||||
997 | TemplateArgumentListInfo &Args, | ||||||||||
998 | unsigned DiagID) { | ||||||||||
999 | auto DiagnoseMissing = [&] { | ||||||||||
1000 | if (DiagID) | ||||||||||
1001 | S.Diag(Loc, DiagID) << printTemplateArgs(S.Context.getPrintingPolicy(), | ||||||||||
1002 | Args, /*Params*/ nullptr); | ||||||||||
1003 | return true; | ||||||||||
1004 | }; | ||||||||||
1005 | |||||||||||
1006 | // FIXME: Factor out duplication with lookupPromiseType in SemaCoroutine. | ||||||||||
1007 | NamespaceDecl *Std = S.getStdNamespace(); | ||||||||||
1008 | if (!Std) | ||||||||||
1009 | return DiagnoseMissing(); | ||||||||||
1010 | |||||||||||
1011 | // Look up the trait itself, within namespace std. We can diagnose various | ||||||||||
1012 | // problems with this lookup even if we've been asked to not diagnose a | ||||||||||
1013 | // missing specialization, because this can only fail if the user has been | ||||||||||
1014 | // declaring their own names in namespace std or we don't support the | ||||||||||
1015 | // standard library implementation in use. | ||||||||||
1016 | LookupResult Result(S, &S.PP.getIdentifierTable().get(Trait), | ||||||||||
1017 | Loc, Sema::LookupOrdinaryName); | ||||||||||
1018 | if (!S.LookupQualifiedName(Result, Std)) | ||||||||||
1019 | return DiagnoseMissing(); | ||||||||||
1020 | if (Result.isAmbiguous()) | ||||||||||
1021 | return true; | ||||||||||
1022 | |||||||||||
1023 | ClassTemplateDecl *TraitTD = Result.getAsSingle<ClassTemplateDecl>(); | ||||||||||
1024 | if (!TraitTD) { | ||||||||||
1025 | Result.suppressDiagnostics(); | ||||||||||
1026 | NamedDecl *Found = *Result.begin(); | ||||||||||
1027 | S.Diag(Loc, diag::err_std_type_trait_not_class_template) << Trait; | ||||||||||
1028 | S.Diag(Found->getLocation(), diag::note_declared_at); | ||||||||||
1029 | return true; | ||||||||||
1030 | } | ||||||||||
1031 | |||||||||||
1032 | // Build the template-id. | ||||||||||
1033 | QualType TraitTy = S.CheckTemplateIdType(TemplateName(TraitTD), Loc, Args); | ||||||||||
1034 | if (TraitTy.isNull()) | ||||||||||
1035 | return true; | ||||||||||
1036 | if (!S.isCompleteType(Loc, TraitTy)) { | ||||||||||
1037 | if (DiagID) | ||||||||||
1038 | S.RequireCompleteType( | ||||||||||
1039 | Loc, TraitTy, DiagID, | ||||||||||
1040 | printTemplateArgs(S.Context.getPrintingPolicy(), Args, | ||||||||||
1041 | TraitTD->getTemplateParameters())); | ||||||||||
1042 | return true; | ||||||||||
1043 | } | ||||||||||
1044 | |||||||||||
1045 | CXXRecordDecl *RD = TraitTy->getAsCXXRecordDecl(); | ||||||||||
1046 | assert(RD && "specialization of class template is not a class?")(static_cast <bool> (RD && "specialization of class template is not a class?" ) ? void (0) : __assert_fail ("RD && \"specialization of class template is not a class?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 1046, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
1047 | |||||||||||
1048 | // Look up the member of the trait type. | ||||||||||
1049 | S.LookupQualifiedName(TraitMemberLookup, RD); | ||||||||||
1050 | return TraitMemberLookup.isAmbiguous(); | ||||||||||
1051 | } | ||||||||||
1052 | |||||||||||
1053 | static TemplateArgumentLoc | ||||||||||
1054 | getTrivialIntegralTemplateArgument(Sema &S, SourceLocation Loc, QualType T, | ||||||||||
1055 | uint64_t I) { | ||||||||||
1056 | TemplateArgument Arg(S.Context, S.Context.MakeIntValue(I, T), T); | ||||||||||
1057 | return S.getTrivialTemplateArgumentLoc(Arg, T, Loc); | ||||||||||
1058 | } | ||||||||||
1059 | |||||||||||
1060 | static TemplateArgumentLoc | ||||||||||
1061 | getTrivialTypeTemplateArgument(Sema &S, SourceLocation Loc, QualType T) { | ||||||||||
1062 | return S.getTrivialTemplateArgumentLoc(TemplateArgument(T), QualType(), Loc); | ||||||||||
1063 | } | ||||||||||
1064 | |||||||||||
1065 | namespace { enum class IsTupleLike { TupleLike, NotTupleLike, Error }; } | ||||||||||
1066 | |||||||||||
1067 | static IsTupleLike isTupleLike(Sema &S, SourceLocation Loc, QualType T, | ||||||||||
1068 | llvm::APSInt &Size) { | ||||||||||
1069 | EnterExpressionEvaluationContext ContextRAII( | ||||||||||
1070 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); | ||||||||||
1071 | |||||||||||
1072 | DeclarationName Value = S.PP.getIdentifierInfo("value"); | ||||||||||
1073 | LookupResult R(S, Value, Loc, Sema::LookupOrdinaryName); | ||||||||||
1074 | |||||||||||
1075 | // Form template argument list for tuple_size<T>. | ||||||||||
1076 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||||||
1077 | Args.addArgument(getTrivialTypeTemplateArgument(S, Loc, T)); | ||||||||||
1078 | |||||||||||
1079 | // If there's no tuple_size specialization or the lookup of 'value' is empty, | ||||||||||
1080 | // it's not tuple-like. | ||||||||||
1081 | if (lookupStdTypeTraitMember(S, R, Loc, "tuple_size", Args, /*DiagID*/ 0) || | ||||||||||
1082 | R.empty()) | ||||||||||
1083 | return IsTupleLike::NotTupleLike; | ||||||||||
1084 | |||||||||||
1085 | // If we get this far, we've committed to the tuple interpretation, but | ||||||||||
1086 | // we can still fail if there actually isn't a usable ::value. | ||||||||||
1087 | |||||||||||
1088 | struct ICEDiagnoser : Sema::VerifyICEDiagnoser { | ||||||||||
1089 | LookupResult &R; | ||||||||||
1090 | TemplateArgumentListInfo &Args; | ||||||||||
1091 | ICEDiagnoser(LookupResult &R, TemplateArgumentListInfo &Args) | ||||||||||
1092 | : R(R), Args(Args) {} | ||||||||||
1093 | Sema::SemaDiagnosticBuilder diagnoseNotICE(Sema &S, | ||||||||||
1094 | SourceLocation Loc) override { | ||||||||||
1095 | return S.Diag(Loc, diag::err_decomp_decl_std_tuple_size_not_constant) | ||||||||||
1096 | << printTemplateArgs(S.Context.getPrintingPolicy(), Args, | ||||||||||
1097 | /*Params*/ nullptr); | ||||||||||
1098 | } | ||||||||||
1099 | } Diagnoser(R, Args); | ||||||||||
1100 | |||||||||||
1101 | ExprResult E = | ||||||||||
1102 | S.BuildDeclarationNameExpr(CXXScopeSpec(), R, /*NeedsADL*/false); | ||||||||||
1103 | if (E.isInvalid()) | ||||||||||
1104 | return IsTupleLike::Error; | ||||||||||
1105 | |||||||||||
1106 | E = S.VerifyIntegerConstantExpression(E.get(), &Size, Diagnoser); | ||||||||||
1107 | if (E.isInvalid()) | ||||||||||
1108 | return IsTupleLike::Error; | ||||||||||
1109 | |||||||||||
1110 | return IsTupleLike::TupleLike; | ||||||||||
1111 | } | ||||||||||
1112 | |||||||||||
1113 | /// \return std::tuple_element<I, T>::type. | ||||||||||
1114 | static QualType getTupleLikeElementType(Sema &S, SourceLocation Loc, | ||||||||||
1115 | unsigned I, QualType T) { | ||||||||||
1116 | // Form template argument list for tuple_element<I, T>. | ||||||||||
1117 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||||||
1118 | Args.addArgument( | ||||||||||
1119 | getTrivialIntegralTemplateArgument(S, Loc, S.Context.getSizeType(), I)); | ||||||||||
1120 | Args.addArgument(getTrivialTypeTemplateArgument(S, Loc, T)); | ||||||||||
1121 | |||||||||||
1122 | DeclarationName TypeDN = S.PP.getIdentifierInfo("type"); | ||||||||||
1123 | LookupResult R(S, TypeDN, Loc, Sema::LookupOrdinaryName); | ||||||||||
1124 | if (lookupStdTypeTraitMember( | ||||||||||
1125 | S, R, Loc, "tuple_element", Args, | ||||||||||
1126 | diag::err_decomp_decl_std_tuple_element_not_specialized)) | ||||||||||
1127 | return QualType(); | ||||||||||
1128 | |||||||||||
1129 | auto *TD = R.getAsSingle<TypeDecl>(); | ||||||||||
1130 | if (!TD) { | ||||||||||
1131 | R.suppressDiagnostics(); | ||||||||||
1132 | S.Diag(Loc, diag::err_decomp_decl_std_tuple_element_not_specialized) | ||||||||||
1133 | << printTemplateArgs(S.Context.getPrintingPolicy(), Args, | ||||||||||
1134 | /*Params*/ nullptr); | ||||||||||
1135 | if (!R.empty()) | ||||||||||
1136 | S.Diag(R.getRepresentativeDecl()->getLocation(), diag::note_declared_at); | ||||||||||
1137 | return QualType(); | ||||||||||
1138 | } | ||||||||||
1139 | |||||||||||
1140 | return S.Context.getTypeDeclType(TD); | ||||||||||
1141 | } | ||||||||||
1142 | |||||||||||
1143 | namespace { | ||||||||||
1144 | struct InitializingBinding { | ||||||||||
1145 | Sema &S; | ||||||||||
1146 | InitializingBinding(Sema &S, BindingDecl *BD) : S(S) { | ||||||||||
1147 | Sema::CodeSynthesisContext Ctx; | ||||||||||
1148 | Ctx.Kind = Sema::CodeSynthesisContext::InitializingStructuredBinding; | ||||||||||
1149 | Ctx.PointOfInstantiation = BD->getLocation(); | ||||||||||
1150 | Ctx.Entity = BD; | ||||||||||
1151 | S.pushCodeSynthesisContext(Ctx); | ||||||||||
1152 | } | ||||||||||
1153 | ~InitializingBinding() { | ||||||||||
1154 | S.popCodeSynthesisContext(); | ||||||||||
1155 | } | ||||||||||
1156 | }; | ||||||||||
1157 | } | ||||||||||
1158 | |||||||||||
1159 | static bool checkTupleLikeDecomposition(Sema &S, | ||||||||||
1160 | ArrayRef<BindingDecl *> Bindings, | ||||||||||
1161 | VarDecl *Src, QualType DecompType, | ||||||||||
1162 | const llvm::APSInt &TupleSize) { | ||||||||||
1163 | if ((int64_t)Bindings.size() != TupleSize) { | ||||||||||
1164 | S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings) | ||||||||||
1165 | << DecompType << (unsigned)Bindings.size() | ||||||||||
1166 | << (unsigned)TupleSize.getLimitedValue(UINT_MAX(2147483647 *2U +1U)) | ||||||||||
1167 | << toString(TupleSize, 10) << (TupleSize < Bindings.size()); | ||||||||||
1168 | return true; | ||||||||||
1169 | } | ||||||||||
1170 | |||||||||||
1171 | if (Bindings.empty()) | ||||||||||
1172 | return false; | ||||||||||
1173 | |||||||||||
1174 | DeclarationName GetDN = S.PP.getIdentifierInfo("get"); | ||||||||||
1175 | |||||||||||
1176 | // [dcl.decomp]p3: | ||||||||||
1177 | // The unqualified-id get is looked up in the scope of E by class member | ||||||||||
1178 | // access lookup ... | ||||||||||
1179 | LookupResult MemberGet(S, GetDN, Src->getLocation(), Sema::LookupMemberName); | ||||||||||
1180 | bool UseMemberGet = false; | ||||||||||
1181 | if (S.isCompleteType(Src->getLocation(), DecompType)) { | ||||||||||
1182 | if (auto *RD = DecompType->getAsCXXRecordDecl()) | ||||||||||
1183 | S.LookupQualifiedName(MemberGet, RD); | ||||||||||
1184 | if (MemberGet.isAmbiguous()) | ||||||||||
1185 | return true; | ||||||||||
1186 | // ... and if that finds at least one declaration that is a function | ||||||||||
1187 | // template whose first template parameter is a non-type parameter ... | ||||||||||
1188 | for (NamedDecl *D : MemberGet) { | ||||||||||
1189 | if (FunctionTemplateDecl *FTD = | ||||||||||
1190 | dyn_cast<FunctionTemplateDecl>(D->getUnderlyingDecl())) { | ||||||||||
1191 | TemplateParameterList *TPL = FTD->getTemplateParameters(); | ||||||||||
1192 | if (TPL->size() != 0 && | ||||||||||
1193 | isa<NonTypeTemplateParmDecl>(TPL->getParam(0))) { | ||||||||||
1194 | // ... the initializer is e.get<i>(). | ||||||||||
1195 | UseMemberGet = true; | ||||||||||
1196 | break; | ||||||||||
1197 | } | ||||||||||
1198 | } | ||||||||||
1199 | } | ||||||||||
1200 | } | ||||||||||
1201 | |||||||||||
1202 | unsigned I = 0; | ||||||||||
1203 | for (auto *B : Bindings) { | ||||||||||
1204 | InitializingBinding InitContext(S, B); | ||||||||||
1205 | SourceLocation Loc = B->getLocation(); | ||||||||||
1206 | |||||||||||
1207 | ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc); | ||||||||||
1208 | if (E.isInvalid()) | ||||||||||
1209 | return true; | ||||||||||
1210 | |||||||||||
1211 | // e is an lvalue if the type of the entity is an lvalue reference and | ||||||||||
1212 | // an xvalue otherwise | ||||||||||
1213 | if (!Src->getType()->isLValueReferenceType()) | ||||||||||
1214 | E = ImplicitCastExpr::Create(S.Context, E.get()->getType(), CK_NoOp, | ||||||||||
1215 | E.get(), nullptr, VK_XValue, | ||||||||||
1216 | FPOptionsOverride()); | ||||||||||
1217 | |||||||||||
1218 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||||||
1219 | Args.addArgument( | ||||||||||
1220 | getTrivialIntegralTemplateArgument(S, Loc, S.Context.getSizeType(), I)); | ||||||||||
1221 | |||||||||||
1222 | if (UseMemberGet) { | ||||||||||
1223 | // if [lookup of member get] finds at least one declaration, the | ||||||||||
1224 | // initializer is e.get<i-1>(). | ||||||||||
1225 | E = S.BuildMemberReferenceExpr(E.get(), DecompType, Loc, false, | ||||||||||
1226 | CXXScopeSpec(), SourceLocation(), nullptr, | ||||||||||
1227 | MemberGet, &Args, nullptr); | ||||||||||
1228 | if (E.isInvalid()) | ||||||||||
1229 | return true; | ||||||||||
1230 | |||||||||||
1231 | E = S.BuildCallExpr(nullptr, E.get(), Loc, None, Loc); | ||||||||||
1232 | } else { | ||||||||||
1233 | // Otherwise, the initializer is get<i-1>(e), where get is looked up | ||||||||||
1234 | // in the associated namespaces. | ||||||||||
1235 | Expr *Get = UnresolvedLookupExpr::Create( | ||||||||||
1236 | S.Context, nullptr, NestedNameSpecifierLoc(), SourceLocation(), | ||||||||||
1237 | DeclarationNameInfo(GetDN, Loc), /*RequiresADL*/true, &Args, | ||||||||||
1238 | UnresolvedSetIterator(), UnresolvedSetIterator()); | ||||||||||
1239 | |||||||||||
1240 | Expr *Arg = E.get(); | ||||||||||
1241 | E = S.BuildCallExpr(nullptr, Get, Loc, Arg, Loc); | ||||||||||
1242 | } | ||||||||||
1243 | if (E.isInvalid()) | ||||||||||
1244 | return true; | ||||||||||
1245 | Expr *Init = E.get(); | ||||||||||
1246 | |||||||||||
1247 | // Given the type T designated by std::tuple_element<i - 1, E>::type, | ||||||||||
1248 | QualType T = getTupleLikeElementType(S, Loc, I, DecompType); | ||||||||||
1249 | if (T.isNull()) | ||||||||||
1250 | return true; | ||||||||||
1251 | |||||||||||
1252 | // each vi is a variable of type "reference to T" initialized with the | ||||||||||
1253 | // initializer, where the reference is an lvalue reference if the | ||||||||||
1254 | // initializer is an lvalue and an rvalue reference otherwise | ||||||||||
1255 | QualType RefType = | ||||||||||
1256 | S.BuildReferenceType(T, E.get()->isLValue(), Loc, B->getDeclName()); | ||||||||||
1257 | if (RefType.isNull()) | ||||||||||
1258 | return true; | ||||||||||
1259 | auto *RefVD = VarDecl::Create( | ||||||||||
1260 | S.Context, Src->getDeclContext(), Loc, Loc, | ||||||||||
1261 | B->getDeclName().getAsIdentifierInfo(), RefType, | ||||||||||
1262 | S.Context.getTrivialTypeSourceInfo(T, Loc), Src->getStorageClass()); | ||||||||||
1263 | RefVD->setLexicalDeclContext(Src->getLexicalDeclContext()); | ||||||||||
1264 | RefVD->setTSCSpec(Src->getTSCSpec()); | ||||||||||
1265 | RefVD->setImplicit(); | ||||||||||
1266 | if (Src->isInlineSpecified()) | ||||||||||
1267 | RefVD->setInlineSpecified(); | ||||||||||
1268 | RefVD->getLexicalDeclContext()->addHiddenDecl(RefVD); | ||||||||||
1269 | |||||||||||
1270 | InitializedEntity Entity = InitializedEntity::InitializeBinding(RefVD); | ||||||||||
1271 | InitializationKind Kind = InitializationKind::CreateCopy(Loc, Loc); | ||||||||||
1272 | InitializationSequence Seq(S, Entity, Kind, Init); | ||||||||||
1273 | E = Seq.Perform(S, Entity, Kind, Init); | ||||||||||
1274 | if (E.isInvalid()) | ||||||||||
1275 | return true; | ||||||||||
1276 | E = S.ActOnFinishFullExpr(E.get(), Loc, /*DiscardedValue*/ false); | ||||||||||
1277 | if (E.isInvalid()) | ||||||||||
1278 | return true; | ||||||||||
1279 | RefVD->setInit(E.get()); | ||||||||||
1280 | S.CheckCompleteVariableDeclaration(RefVD); | ||||||||||
1281 | |||||||||||
1282 | E = S.BuildDeclarationNameExpr(CXXScopeSpec(), | ||||||||||
1283 | DeclarationNameInfo(B->getDeclName(), Loc), | ||||||||||
1284 | RefVD); | ||||||||||
1285 | if (E.isInvalid()) | ||||||||||
1286 | return true; | ||||||||||
1287 | |||||||||||
1288 | B->setBinding(T, E.get()); | ||||||||||
1289 | I++; | ||||||||||
1290 | } | ||||||||||
1291 | |||||||||||
1292 | return false; | ||||||||||
1293 | } | ||||||||||
1294 | |||||||||||
1295 | /// Find the base class to decompose in a built-in decomposition of a class type. | ||||||||||
1296 | /// This base class search is, unfortunately, not quite like any other that we | ||||||||||
1297 | /// perform anywhere else in C++. | ||||||||||
1298 | static DeclAccessPair findDecomposableBaseClass(Sema &S, SourceLocation Loc, | ||||||||||
1299 | const CXXRecordDecl *RD, | ||||||||||
1300 | CXXCastPath &BasePath) { | ||||||||||
1301 | auto BaseHasFields = [](const CXXBaseSpecifier *Specifier, | ||||||||||
1302 | CXXBasePath &Path) { | ||||||||||
1303 | return Specifier->getType()->getAsCXXRecordDecl()->hasDirectFields(); | ||||||||||
1304 | }; | ||||||||||
1305 | |||||||||||
1306 | const CXXRecordDecl *ClassWithFields = nullptr; | ||||||||||
1307 | AccessSpecifier AS = AS_public; | ||||||||||
1308 | if (RD->hasDirectFields()) | ||||||||||
1309 | // [dcl.decomp]p4: | ||||||||||
1310 | // Otherwise, all of E's non-static data members shall be public direct | ||||||||||
1311 | // members of E ... | ||||||||||
1312 | ClassWithFields = RD; | ||||||||||
1313 | else { | ||||||||||
1314 | // ... or of ... | ||||||||||
1315 | CXXBasePaths Paths; | ||||||||||
1316 | Paths.setOrigin(const_cast<CXXRecordDecl*>(RD)); | ||||||||||
1317 | if (!RD->lookupInBases(BaseHasFields, Paths)) { | ||||||||||
1318 | // If no classes have fields, just decompose RD itself. (This will work | ||||||||||
1319 | // if and only if zero bindings were provided.) | ||||||||||
1320 | return DeclAccessPair::make(const_cast<CXXRecordDecl*>(RD), AS_public); | ||||||||||
1321 | } | ||||||||||
1322 | |||||||||||
1323 | CXXBasePath *BestPath = nullptr; | ||||||||||
1324 | for (auto &P : Paths) { | ||||||||||
1325 | if (!BestPath) | ||||||||||
1326 | BestPath = &P; | ||||||||||
1327 | else if (!S.Context.hasSameType(P.back().Base->getType(), | ||||||||||
1328 | BestPath->back().Base->getType())) { | ||||||||||
1329 | // ... the same ... | ||||||||||
1330 | S.Diag(Loc, diag::err_decomp_decl_multiple_bases_with_members) | ||||||||||
1331 | << false << RD << BestPath->back().Base->getType() | ||||||||||
1332 | << P.back().Base->getType(); | ||||||||||
1333 | return DeclAccessPair(); | ||||||||||
1334 | } else if (P.Access < BestPath->Access) { | ||||||||||
1335 | BestPath = &P; | ||||||||||
1336 | } | ||||||||||
1337 | } | ||||||||||
1338 | |||||||||||
1339 | // ... unambiguous ... | ||||||||||
1340 | QualType BaseType = BestPath->back().Base->getType(); | ||||||||||
1341 | if (Paths.isAmbiguous(S.Context.getCanonicalType(BaseType))) { | ||||||||||
1342 | S.Diag(Loc, diag::err_decomp_decl_ambiguous_base) | ||||||||||
1343 | << RD << BaseType << S.getAmbiguousPathsDisplayString(Paths); | ||||||||||
1344 | return DeclAccessPair(); | ||||||||||
1345 | } | ||||||||||
1346 | |||||||||||
1347 | // ... [accessible, implied by other rules] base class of E. | ||||||||||
1348 | S.CheckBaseClassAccess(Loc, BaseType, S.Context.getRecordType(RD), | ||||||||||
1349 | *BestPath, diag::err_decomp_decl_inaccessible_base); | ||||||||||
1350 | AS = BestPath->Access; | ||||||||||
1351 | |||||||||||
1352 | ClassWithFields = BaseType->getAsCXXRecordDecl(); | ||||||||||
1353 | S.BuildBasePathArray(Paths, BasePath); | ||||||||||
1354 | } | ||||||||||
1355 | |||||||||||
1356 | // The above search did not check whether the selected class itself has base | ||||||||||
1357 | // classes with fields, so check that now. | ||||||||||
1358 | CXXBasePaths Paths; | ||||||||||
1359 | if (ClassWithFields->lookupInBases(BaseHasFields, Paths)) { | ||||||||||
1360 | S.Diag(Loc, diag::err_decomp_decl_multiple_bases_with_members) | ||||||||||
1361 | << (ClassWithFields == RD) << RD << ClassWithFields | ||||||||||
1362 | << Paths.front().back().Base->getType(); | ||||||||||
1363 | return DeclAccessPair(); | ||||||||||
1364 | } | ||||||||||
1365 | |||||||||||
1366 | return DeclAccessPair::make(const_cast<CXXRecordDecl*>(ClassWithFields), AS); | ||||||||||
1367 | } | ||||||||||
1368 | |||||||||||
1369 | static bool checkMemberDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings, | ||||||||||
1370 | ValueDecl *Src, QualType DecompType, | ||||||||||
1371 | const CXXRecordDecl *OrigRD) { | ||||||||||
1372 | if (S.RequireCompleteType(Src->getLocation(), DecompType, | ||||||||||
1373 | diag::err_incomplete_type)) | ||||||||||
1374 | return true; | ||||||||||
1375 | |||||||||||
1376 | CXXCastPath BasePath; | ||||||||||
1377 | DeclAccessPair BasePair = | ||||||||||
1378 | findDecomposableBaseClass(S, Src->getLocation(), OrigRD, BasePath); | ||||||||||
1379 | const CXXRecordDecl *RD = cast_or_null<CXXRecordDecl>(BasePair.getDecl()); | ||||||||||
1380 | if (!RD) | ||||||||||
1381 | return true; | ||||||||||
1382 | QualType BaseType = S.Context.getQualifiedType(S.Context.getRecordType(RD), | ||||||||||
1383 | DecompType.getQualifiers()); | ||||||||||
1384 | |||||||||||
1385 | auto DiagnoseBadNumberOfBindings = [&]() -> bool { | ||||||||||
1386 | unsigned NumFields = | ||||||||||
1387 | std::count_if(RD->field_begin(), RD->field_end(), | ||||||||||
1388 | [](FieldDecl *FD) { return !FD->isUnnamedBitfield(); }); | ||||||||||
1389 | assert(Bindings.size() != NumFields)(static_cast <bool> (Bindings.size() != NumFields) ? void (0) : __assert_fail ("Bindings.size() != NumFields", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 1389, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
1390 | S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings) | ||||||||||
1391 | << DecompType << (unsigned)Bindings.size() << NumFields << NumFields | ||||||||||
1392 | << (NumFields < Bindings.size()); | ||||||||||
1393 | return true; | ||||||||||
1394 | }; | ||||||||||
1395 | |||||||||||
1396 | // all of E's non-static data members shall be [...] well-formed | ||||||||||
1397 | // when named as e.name in the context of the structured binding, | ||||||||||
1398 | // E shall not have an anonymous union member, ... | ||||||||||
1399 | unsigned I = 0; | ||||||||||
1400 | for (auto *FD : RD->fields()) { | ||||||||||
1401 | if (FD->isUnnamedBitfield()) | ||||||||||
1402 | continue; | ||||||||||
1403 | |||||||||||
1404 | // All the non-static data members are required to be nameable, so they | ||||||||||
1405 | // must all have names. | ||||||||||
1406 | if (!FD->getDeclName()) { | ||||||||||
1407 | if (RD->isLambda()) { | ||||||||||
1408 | S.Diag(Src->getLocation(), diag::err_decomp_decl_lambda); | ||||||||||
1409 | S.Diag(RD->getLocation(), diag::note_lambda_decl); | ||||||||||
1410 | return true; | ||||||||||
1411 | } | ||||||||||
1412 | |||||||||||
1413 | if (FD->isAnonymousStructOrUnion()) { | ||||||||||
1414 | S.Diag(Src->getLocation(), diag::err_decomp_decl_anon_union_member) | ||||||||||
1415 | << DecompType << FD->getType()->isUnionType(); | ||||||||||
1416 | S.Diag(FD->getLocation(), diag::note_declared_at); | ||||||||||
1417 | return true; | ||||||||||
1418 | } | ||||||||||
1419 | |||||||||||
1420 | // FIXME: Are there any other ways we could have an anonymous member? | ||||||||||
1421 | } | ||||||||||
1422 | |||||||||||
1423 | // We have a real field to bind. | ||||||||||
1424 | if (I >= Bindings.size()) | ||||||||||
1425 | return DiagnoseBadNumberOfBindings(); | ||||||||||
1426 | auto *B = Bindings[I++]; | ||||||||||
1427 | SourceLocation Loc = B->getLocation(); | ||||||||||
1428 | |||||||||||
1429 | // The field must be accessible in the context of the structured binding. | ||||||||||
1430 | // We already checked that the base class is accessible. | ||||||||||
1431 | // FIXME: Add 'const' to AccessedEntity's classes so we can remove the | ||||||||||
1432 | // const_cast here. | ||||||||||
1433 | S.CheckStructuredBindingMemberAccess( | ||||||||||
1434 | Loc, const_cast<CXXRecordDecl *>(OrigRD), | ||||||||||
1435 | DeclAccessPair::make(FD, CXXRecordDecl::MergeAccess( | ||||||||||
1436 | BasePair.getAccess(), FD->getAccess()))); | ||||||||||
1437 | |||||||||||
1438 | // Initialize the binding to Src.FD. | ||||||||||
1439 | ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc); | ||||||||||
1440 | if (E.isInvalid()) | ||||||||||
1441 | return true; | ||||||||||
1442 | E = S.ImpCastExprToType(E.get(), BaseType, CK_UncheckedDerivedToBase, | ||||||||||
1443 | VK_LValue, &BasePath); | ||||||||||
1444 | if (E.isInvalid()) | ||||||||||
1445 | return true; | ||||||||||
1446 | E = S.BuildFieldReferenceExpr(E.get(), /*IsArrow*/ false, Loc, | ||||||||||
1447 | CXXScopeSpec(), FD, | ||||||||||
1448 | DeclAccessPair::make(FD, FD->getAccess()), | ||||||||||
1449 | DeclarationNameInfo(FD->getDeclName(), Loc)); | ||||||||||
1450 | if (E.isInvalid()) | ||||||||||
1451 | return true; | ||||||||||
1452 | |||||||||||
1453 | // If the type of the member is T, the referenced type is cv T, where cv is | ||||||||||
1454 | // the cv-qualification of the decomposition expression. | ||||||||||
1455 | // | ||||||||||
1456 | // FIXME: We resolve a defect here: if the field is mutable, we do not add | ||||||||||
1457 | // 'const' to the type of the field. | ||||||||||
1458 | Qualifiers Q = DecompType.getQualifiers(); | ||||||||||
1459 | if (FD->isMutable()) | ||||||||||
1460 | Q.removeConst(); | ||||||||||
1461 | B->setBinding(S.BuildQualifiedType(FD->getType(), Loc, Q), E.get()); | ||||||||||
1462 | } | ||||||||||
1463 | |||||||||||
1464 | if (I != Bindings.size()) | ||||||||||
1465 | return DiagnoseBadNumberOfBindings(); | ||||||||||
1466 | |||||||||||
1467 | return false; | ||||||||||
1468 | } | ||||||||||
1469 | |||||||||||
1470 | void Sema::CheckCompleteDecompositionDeclaration(DecompositionDecl *DD) { | ||||||||||
1471 | QualType DecompType = DD->getType(); | ||||||||||
1472 | |||||||||||
1473 | // If the type of the decomposition is dependent, then so is the type of | ||||||||||
1474 | // each binding. | ||||||||||
1475 | if (DecompType->isDependentType()) { | ||||||||||
1476 | for (auto *B : DD->bindings()) | ||||||||||
1477 | B->setType(Context.DependentTy); | ||||||||||
1478 | return; | ||||||||||
1479 | } | ||||||||||
1480 | |||||||||||
1481 | DecompType = DecompType.getNonReferenceType(); | ||||||||||
1482 | ArrayRef<BindingDecl*> Bindings = DD->bindings(); | ||||||||||
1483 | |||||||||||
1484 | // C++1z [dcl.decomp]/2: | ||||||||||
1485 | // If E is an array type [...] | ||||||||||
1486 | // As an extension, we also support decomposition of built-in complex and | ||||||||||
1487 | // vector types. | ||||||||||
1488 | if (auto *CAT = Context.getAsConstantArrayType(DecompType)) { | ||||||||||
1489 | if (checkArrayDecomposition(*this, Bindings, DD, DecompType, CAT)) | ||||||||||
1490 | DD->setInvalidDecl(); | ||||||||||
1491 | return; | ||||||||||
1492 | } | ||||||||||
1493 | if (auto *VT = DecompType->getAs<VectorType>()) { | ||||||||||
1494 | if (checkVectorDecomposition(*this, Bindings, DD, DecompType, VT)) | ||||||||||
1495 | DD->setInvalidDecl(); | ||||||||||
1496 | return; | ||||||||||
1497 | } | ||||||||||
1498 | if (auto *CT = DecompType->getAs<ComplexType>()) { | ||||||||||
1499 | if (checkComplexDecomposition(*this, Bindings, DD, DecompType, CT)) | ||||||||||
1500 | DD->setInvalidDecl(); | ||||||||||
1501 | return; | ||||||||||
1502 | } | ||||||||||
1503 | |||||||||||
1504 | // C++1z [dcl.decomp]/3: | ||||||||||
1505 | // if the expression std::tuple_size<E>::value is a well-formed integral | ||||||||||
1506 | // constant expression, [...] | ||||||||||
1507 | llvm::APSInt TupleSize(32); | ||||||||||
1508 | switch (isTupleLike(*this, DD->getLocation(), DecompType, TupleSize)) { | ||||||||||
1509 | case IsTupleLike::Error: | ||||||||||
1510 | DD->setInvalidDecl(); | ||||||||||
1511 | return; | ||||||||||
1512 | |||||||||||
1513 | case IsTupleLike::TupleLike: | ||||||||||
1514 | if (checkTupleLikeDecomposition(*this, Bindings, DD, DecompType, TupleSize)) | ||||||||||
1515 | DD->setInvalidDecl(); | ||||||||||
1516 | return; | ||||||||||
1517 | |||||||||||
1518 | case IsTupleLike::NotTupleLike: | ||||||||||
1519 | break; | ||||||||||
1520 | } | ||||||||||
1521 | |||||||||||
1522 | // C++1z [dcl.dcl]/8: | ||||||||||
1523 | // [E shall be of array or non-union class type] | ||||||||||
1524 | CXXRecordDecl *RD = DecompType->getAsCXXRecordDecl(); | ||||||||||
1525 | if (!RD || RD->isUnion()) { | ||||||||||
1526 | Diag(DD->getLocation(), diag::err_decomp_decl_unbindable_type) | ||||||||||
1527 | << DD << !RD << DecompType; | ||||||||||
1528 | DD->setInvalidDecl(); | ||||||||||
1529 | return; | ||||||||||
1530 | } | ||||||||||
1531 | |||||||||||
1532 | // C++1z [dcl.decomp]/4: | ||||||||||
1533 | // all of E's non-static data members shall be [...] direct members of | ||||||||||
1534 | // E or of the same unambiguous public base class of E, ... | ||||||||||
1535 | if (checkMemberDecomposition(*this, Bindings, DD, DecompType, RD)) | ||||||||||
1536 | DD->setInvalidDecl(); | ||||||||||
1537 | } | ||||||||||
1538 | |||||||||||
1539 | /// Merge the exception specifications of two variable declarations. | ||||||||||
1540 | /// | ||||||||||
1541 | /// This is called when there's a redeclaration of a VarDecl. The function | ||||||||||
1542 | /// checks if the redeclaration might have an exception specification and | ||||||||||
1543 | /// validates compatibility and merges the specs if necessary. | ||||||||||
1544 | void Sema::MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old) { | ||||||||||
1545 | // Shortcut if exceptions are disabled. | ||||||||||
1546 | if (!getLangOpts().CXXExceptions) | ||||||||||
1547 | return; | ||||||||||
1548 | |||||||||||
1549 | assert(Context.hasSameType(New->getType(), Old->getType()) &&(static_cast <bool> (Context.hasSameType(New->getType (), Old->getType()) && "Should only be called if types are otherwise the same." ) ? void (0) : __assert_fail ("Context.hasSameType(New->getType(), Old->getType()) && \"Should only be called if types are otherwise the same.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 1550, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
1550 | "Should only be called if types are otherwise the same.")(static_cast <bool> (Context.hasSameType(New->getType (), Old->getType()) && "Should only be called if types are otherwise the same." ) ? void (0) : __assert_fail ("Context.hasSameType(New->getType(), Old->getType()) && \"Should only be called if types are otherwise the same.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 1550, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
1551 | |||||||||||
1552 | QualType NewType = New->getType(); | ||||||||||
1553 | QualType OldType = Old->getType(); | ||||||||||
1554 | |||||||||||
1555 | // We're only interested in pointers and references to functions, as well | ||||||||||
1556 | // as pointers to member functions. | ||||||||||
1557 | if (const ReferenceType *R = NewType->getAs<ReferenceType>()) { | ||||||||||
1558 | NewType = R->getPointeeType(); | ||||||||||
1559 | OldType = OldType->castAs<ReferenceType>()->getPointeeType(); | ||||||||||
1560 | } else if (const PointerType *P = NewType->getAs<PointerType>()) { | ||||||||||
1561 | NewType = P->getPointeeType(); | ||||||||||
1562 | OldType = OldType->castAs<PointerType>()->getPointeeType(); | ||||||||||
1563 | } else if (const MemberPointerType *M = NewType->getAs<MemberPointerType>()) { | ||||||||||
1564 | NewType = M->getPointeeType(); | ||||||||||
1565 | OldType = OldType->castAs<MemberPointerType>()->getPointeeType(); | ||||||||||
1566 | } | ||||||||||
1567 | |||||||||||
1568 | if (!NewType->isFunctionProtoType()) | ||||||||||
1569 | return; | ||||||||||
1570 | |||||||||||
1571 | // There's lots of special cases for functions. For function pointers, system | ||||||||||
1572 | // libraries are hopefully not as broken so that we don't need these | ||||||||||
1573 | // workarounds. | ||||||||||
1574 | if (CheckEquivalentExceptionSpec( | ||||||||||
1575 | OldType->getAs<FunctionProtoType>(), Old->getLocation(), | ||||||||||
1576 | NewType->getAs<FunctionProtoType>(), New->getLocation())) { | ||||||||||
1577 | New->setInvalidDecl(); | ||||||||||
1578 | } | ||||||||||
1579 | } | ||||||||||
1580 | |||||||||||
1581 | /// CheckCXXDefaultArguments - Verify that the default arguments for a | ||||||||||
1582 | /// function declaration are well-formed according to C++ | ||||||||||
1583 | /// [dcl.fct.default]. | ||||||||||
1584 | void Sema::CheckCXXDefaultArguments(FunctionDecl *FD) { | ||||||||||
1585 | unsigned NumParams = FD->getNumParams(); | ||||||||||
1586 | unsigned ParamIdx = 0; | ||||||||||
1587 | |||||||||||
1588 | // This checking doesn't make sense for explicit specializations; their | ||||||||||
1589 | // default arguments are determined by the declaration we're specializing, | ||||||||||
1590 | // not by FD. | ||||||||||
1591 | if (FD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization) | ||||||||||
1592 | return; | ||||||||||
1593 | if (auto *FTD = FD->getDescribedFunctionTemplate()) | ||||||||||
1594 | if (FTD->isMemberSpecialization()) | ||||||||||
1595 | return; | ||||||||||
1596 | |||||||||||
1597 | // Find first parameter with a default argument | ||||||||||
1598 | for (; ParamIdx < NumParams; ++ParamIdx) { | ||||||||||
1599 | ParmVarDecl *Param = FD->getParamDecl(ParamIdx); | ||||||||||
1600 | if (Param->hasDefaultArg()) | ||||||||||
1601 | break; | ||||||||||
1602 | } | ||||||||||
1603 | |||||||||||
1604 | // C++20 [dcl.fct.default]p4: | ||||||||||
1605 | // In a given function declaration, each parameter subsequent to a parameter | ||||||||||
1606 | // with a default argument shall have a default argument supplied in this or | ||||||||||
1607 | // a previous declaration, unless the parameter was expanded from a | ||||||||||
1608 | // parameter pack, or shall be a function parameter pack. | ||||||||||
1609 | for (; ParamIdx < NumParams; ++ParamIdx) { | ||||||||||
1610 | ParmVarDecl *Param = FD->getParamDecl(ParamIdx); | ||||||||||
1611 | if (!Param->hasDefaultArg() && !Param->isParameterPack() && | ||||||||||
1612 | !(CurrentInstantiationScope && | ||||||||||
1613 | CurrentInstantiationScope->isLocalPackExpansion(Param))) { | ||||||||||
1614 | if (Param->isInvalidDecl()) | ||||||||||
1615 | /* We already complained about this parameter. */; | ||||||||||
1616 | else if (Param->getIdentifier()) | ||||||||||
1617 | Diag(Param->getLocation(), | ||||||||||
1618 | diag::err_param_default_argument_missing_name) | ||||||||||
1619 | << Param->getIdentifier(); | ||||||||||
1620 | else | ||||||||||
1621 | Diag(Param->getLocation(), | ||||||||||
1622 | diag::err_param_default_argument_missing); | ||||||||||
1623 | } | ||||||||||
1624 | } | ||||||||||
1625 | } | ||||||||||
1626 | |||||||||||
1627 | /// Check that the given type is a literal type. Issue a diagnostic if not, | ||||||||||
1628 | /// if Kind is Diagnose. | ||||||||||
1629 | /// \return \c true if a problem has been found (and optionally diagnosed). | ||||||||||
1630 | template <typename... Ts> | ||||||||||
1631 | static bool CheckLiteralType(Sema &SemaRef, Sema::CheckConstexprKind Kind, | ||||||||||
1632 | SourceLocation Loc, QualType T, unsigned DiagID, | ||||||||||
1633 | Ts &&...DiagArgs) { | ||||||||||
1634 | if (T->isDependentType()) | ||||||||||
1635 | return false; | ||||||||||
1636 | |||||||||||
1637 | switch (Kind) { | ||||||||||
1638 | case Sema::CheckConstexprKind::Diagnose: | ||||||||||
1639 | return SemaRef.RequireLiteralType(Loc, T, DiagID, | ||||||||||
1640 | std::forward<Ts>(DiagArgs)...); | ||||||||||
1641 | |||||||||||
1642 | case Sema::CheckConstexprKind::CheckValid: | ||||||||||
1643 | return !T->isLiteralType(SemaRef.Context); | ||||||||||
1644 | } | ||||||||||
1645 | |||||||||||
1646 | llvm_unreachable("unknown CheckConstexprKind")::llvm::llvm_unreachable_internal("unknown CheckConstexprKind" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 1646); | ||||||||||
1647 | } | ||||||||||
1648 | |||||||||||
1649 | /// Determine whether a destructor cannot be constexpr due to | ||||||||||
1650 | static bool CheckConstexprDestructorSubobjects(Sema &SemaRef, | ||||||||||
1651 | const CXXDestructorDecl *DD, | ||||||||||
1652 | Sema::CheckConstexprKind Kind) { | ||||||||||
1653 | auto Check = [&](SourceLocation Loc, QualType T, const FieldDecl *FD) { | ||||||||||
1654 | const CXXRecordDecl *RD = | ||||||||||
1655 | T->getBaseElementTypeUnsafe()->getAsCXXRecordDecl(); | ||||||||||
1656 | if (!RD || RD->hasConstexprDestructor()) | ||||||||||
1657 | return true; | ||||||||||
1658 | |||||||||||
1659 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
1660 | SemaRef.Diag(DD->getLocation(), diag::err_constexpr_dtor_subobject) | ||||||||||
1661 | << static_cast<int>(DD->getConstexprKind()) << !FD | ||||||||||
1662 | << (FD ? FD->getDeclName() : DeclarationName()) << T; | ||||||||||
1663 | SemaRef.Diag(Loc, diag::note_constexpr_dtor_subobject) | ||||||||||
1664 | << !FD << (FD ? FD->getDeclName() : DeclarationName()) << T; | ||||||||||
1665 | } | ||||||||||
1666 | return false; | ||||||||||
1667 | }; | ||||||||||
1668 | |||||||||||
1669 | const CXXRecordDecl *RD = DD->getParent(); | ||||||||||
1670 | for (const CXXBaseSpecifier &B : RD->bases()) | ||||||||||
1671 | if (!Check(B.getBaseTypeLoc(), B.getType(), nullptr)) | ||||||||||
1672 | return false; | ||||||||||
1673 | for (const FieldDecl *FD : RD->fields()) | ||||||||||
1674 | if (!Check(FD->getLocation(), FD->getType(), FD)) | ||||||||||
1675 | return false; | ||||||||||
1676 | return true; | ||||||||||
1677 | } | ||||||||||
1678 | |||||||||||
1679 | /// Check whether a function's parameter types are all literal types. If so, | ||||||||||
1680 | /// return true. If not, produce a suitable diagnostic and return false. | ||||||||||
1681 | static bool CheckConstexprParameterTypes(Sema &SemaRef, | ||||||||||
1682 | const FunctionDecl *FD, | ||||||||||
1683 | Sema::CheckConstexprKind Kind) { | ||||||||||
1684 | unsigned ArgIndex = 0; | ||||||||||
1685 | const auto *FT = FD->getType()->castAs<FunctionProtoType>(); | ||||||||||
1686 | for (FunctionProtoType::param_type_iterator i = FT->param_type_begin(), | ||||||||||
1687 | e = FT->param_type_end(); | ||||||||||
1688 | i != e; ++i, ++ArgIndex) { | ||||||||||
1689 | const ParmVarDecl *PD = FD->getParamDecl(ArgIndex); | ||||||||||
1690 | SourceLocation ParamLoc = PD->getLocation(); | ||||||||||
1691 | if (CheckLiteralType(SemaRef, Kind, ParamLoc, *i, | ||||||||||
1692 | diag::err_constexpr_non_literal_param, ArgIndex + 1, | ||||||||||
1693 | PD->getSourceRange(), isa<CXXConstructorDecl>(FD), | ||||||||||
1694 | FD->isConsteval())) | ||||||||||
1695 | return false; | ||||||||||
1696 | } | ||||||||||
1697 | return true; | ||||||||||
1698 | } | ||||||||||
1699 | |||||||||||
1700 | /// Check whether a function's return type is a literal type. If so, return | ||||||||||
1701 | /// true. If not, produce a suitable diagnostic and return false. | ||||||||||
1702 | static bool CheckConstexprReturnType(Sema &SemaRef, const FunctionDecl *FD, | ||||||||||
1703 | Sema::CheckConstexprKind Kind) { | ||||||||||
1704 | if (CheckLiteralType(SemaRef, Kind, FD->getLocation(), FD->getReturnType(), | ||||||||||
1705 | diag::err_constexpr_non_literal_return, | ||||||||||
1706 | FD->isConsteval())) | ||||||||||
1707 | return false; | ||||||||||
1708 | return true; | ||||||||||
1709 | } | ||||||||||
1710 | |||||||||||
1711 | /// Get diagnostic %select index for tag kind for | ||||||||||
1712 | /// record diagnostic message. | ||||||||||
1713 | /// WARNING: Indexes apply to particular diagnostics only! | ||||||||||
1714 | /// | ||||||||||
1715 | /// \returns diagnostic %select index. | ||||||||||
1716 | static unsigned getRecordDiagFromTagKind(TagTypeKind Tag) { | ||||||||||
1717 | switch (Tag) { | ||||||||||
1718 | case TTK_Struct: return 0; | ||||||||||
1719 | case TTK_Interface: return 1; | ||||||||||
1720 | case TTK_Class: return 2; | ||||||||||
1721 | default: llvm_unreachable("Invalid tag kind for record diagnostic!")::llvm::llvm_unreachable_internal("Invalid tag kind for record diagnostic!" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 1721); | ||||||||||
1722 | } | ||||||||||
1723 | } | ||||||||||
1724 | |||||||||||
1725 | static bool CheckConstexprFunctionBody(Sema &SemaRef, const FunctionDecl *Dcl, | ||||||||||
1726 | Stmt *Body, | ||||||||||
1727 | Sema::CheckConstexprKind Kind); | ||||||||||
1728 | |||||||||||
1729 | // Check whether a function declaration satisfies the requirements of a | ||||||||||
1730 | // constexpr function definition or a constexpr constructor definition. If so, | ||||||||||
1731 | // return true. If not, produce appropriate diagnostics (unless asked not to by | ||||||||||
1732 | // Kind) and return false. | ||||||||||
1733 | // | ||||||||||
1734 | // This implements C++11 [dcl.constexpr]p3,4, as amended by DR1360. | ||||||||||
1735 | bool Sema::CheckConstexprFunctionDefinition(const FunctionDecl *NewFD, | ||||||||||
1736 | CheckConstexprKind Kind) { | ||||||||||
1737 | const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD); | ||||||||||
1738 | if (MD && MD->isInstance()) { | ||||||||||
1739 | // C++11 [dcl.constexpr]p4: | ||||||||||
1740 | // The definition of a constexpr constructor shall satisfy the following | ||||||||||
1741 | // constraints: | ||||||||||
1742 | // - the class shall not have any virtual base classes; | ||||||||||
1743 | // | ||||||||||
1744 | // FIXME: This only applies to constructors and destructors, not arbitrary | ||||||||||
1745 | // member functions. | ||||||||||
1746 | const CXXRecordDecl *RD = MD->getParent(); | ||||||||||
1747 | if (RD->getNumVBases()) { | ||||||||||
1748 | if (Kind == CheckConstexprKind::CheckValid) | ||||||||||
1749 | return false; | ||||||||||
1750 | |||||||||||
1751 | Diag(NewFD->getLocation(), diag::err_constexpr_virtual_base) | ||||||||||
1752 | << isa<CXXConstructorDecl>(NewFD) | ||||||||||
1753 | << getRecordDiagFromTagKind(RD->getTagKind()) << RD->getNumVBases(); | ||||||||||
1754 | for (const auto &I : RD->vbases()) | ||||||||||
1755 | Diag(I.getBeginLoc(), diag::note_constexpr_virtual_base_here) | ||||||||||
1756 | << I.getSourceRange(); | ||||||||||
1757 | return false; | ||||||||||
1758 | } | ||||||||||
1759 | } | ||||||||||
1760 | |||||||||||
1761 | if (!isa<CXXConstructorDecl>(NewFD)) { | ||||||||||
1762 | // C++11 [dcl.constexpr]p3: | ||||||||||
1763 | // The definition of a constexpr function shall satisfy the following | ||||||||||
1764 | // constraints: | ||||||||||
1765 | // - it shall not be virtual; (removed in C++20) | ||||||||||
1766 | const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD); | ||||||||||
1767 | if (Method && Method->isVirtual()) { | ||||||||||
1768 | if (getLangOpts().CPlusPlus20) { | ||||||||||
1769 | if (Kind == CheckConstexprKind::Diagnose) | ||||||||||
1770 | Diag(Method->getLocation(), diag::warn_cxx17_compat_constexpr_virtual); | ||||||||||
1771 | } else { | ||||||||||
1772 | if (Kind == CheckConstexprKind::CheckValid) | ||||||||||
1773 | return false; | ||||||||||
1774 | |||||||||||
1775 | Method = Method->getCanonicalDecl(); | ||||||||||
1776 | Diag(Method->getLocation(), diag::err_constexpr_virtual); | ||||||||||
1777 | |||||||||||
1778 | // If it's not obvious why this function is virtual, find an overridden | ||||||||||
1779 | // function which uses the 'virtual' keyword. | ||||||||||
1780 | const CXXMethodDecl *WrittenVirtual = Method; | ||||||||||
1781 | while (!WrittenVirtual->isVirtualAsWritten()) | ||||||||||
1782 | WrittenVirtual = *WrittenVirtual->begin_overridden_methods(); | ||||||||||
1783 | if (WrittenVirtual != Method) | ||||||||||
1784 | Diag(WrittenVirtual->getLocation(), | ||||||||||
1785 | diag::note_overridden_virtual_function); | ||||||||||
1786 | return false; | ||||||||||
1787 | } | ||||||||||
1788 | } | ||||||||||
1789 | |||||||||||
1790 | // - its return type shall be a literal type; | ||||||||||
1791 | if (!CheckConstexprReturnType(*this, NewFD, Kind)) | ||||||||||
1792 | return false; | ||||||||||
1793 | } | ||||||||||
1794 | |||||||||||
1795 | if (auto *Dtor = dyn_cast<CXXDestructorDecl>(NewFD)) { | ||||||||||
1796 | // A destructor can be constexpr only if the defaulted destructor could be; | ||||||||||
1797 | // we don't need to check the members and bases if we already know they all | ||||||||||
1798 | // have constexpr destructors. | ||||||||||
1799 | if (!Dtor->getParent()->defaultedDestructorIsConstexpr()) { | ||||||||||
1800 | if (Kind == CheckConstexprKind::CheckValid) | ||||||||||
1801 | return false; | ||||||||||
1802 | if (!CheckConstexprDestructorSubobjects(*this, Dtor, Kind)) | ||||||||||
1803 | return false; | ||||||||||
1804 | } | ||||||||||
1805 | } | ||||||||||
1806 | |||||||||||
1807 | // - each of its parameter types shall be a literal type; | ||||||||||
1808 | if (!CheckConstexprParameterTypes(*this, NewFD, Kind)) | ||||||||||
1809 | return false; | ||||||||||
1810 | |||||||||||
1811 | Stmt *Body = NewFD->getBody(); | ||||||||||
1812 | assert(Body &&(static_cast <bool> (Body && "CheckConstexprFunctionDefinition called on function with no body" ) ? void (0) : __assert_fail ("Body && \"CheckConstexprFunctionDefinition called on function with no body\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 1813, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
1813 | "CheckConstexprFunctionDefinition called on function with no body")(static_cast <bool> (Body && "CheckConstexprFunctionDefinition called on function with no body" ) ? void (0) : __assert_fail ("Body && \"CheckConstexprFunctionDefinition called on function with no body\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 1813, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
1814 | return CheckConstexprFunctionBody(*this, NewFD, Body, Kind); | ||||||||||
1815 | } | ||||||||||
1816 | |||||||||||
1817 | /// Check the given declaration statement is legal within a constexpr function | ||||||||||
1818 | /// body. C++11 [dcl.constexpr]p3,p4, and C++1y [dcl.constexpr]p3. | ||||||||||
1819 | /// | ||||||||||
1820 | /// \return true if the body is OK (maybe only as an extension), false if we | ||||||||||
1821 | /// have diagnosed a problem. | ||||||||||
1822 | static bool CheckConstexprDeclStmt(Sema &SemaRef, const FunctionDecl *Dcl, | ||||||||||
1823 | DeclStmt *DS, SourceLocation &Cxx1yLoc, | ||||||||||
1824 | Sema::CheckConstexprKind Kind) { | ||||||||||
1825 | // C++11 [dcl.constexpr]p3 and p4: | ||||||||||
1826 | // The definition of a constexpr function(p3) or constructor(p4) [...] shall | ||||||||||
1827 | // contain only | ||||||||||
1828 | for (const auto *DclIt : DS->decls()) { | ||||||||||
1829 | switch (DclIt->getKind()) { | ||||||||||
1830 | case Decl::StaticAssert: | ||||||||||
1831 | case Decl::Using: | ||||||||||
1832 | case Decl::UsingShadow: | ||||||||||
1833 | case Decl::UsingDirective: | ||||||||||
1834 | case Decl::UnresolvedUsingTypename: | ||||||||||
1835 | case Decl::UnresolvedUsingValue: | ||||||||||
1836 | case Decl::UsingEnum: | ||||||||||
1837 | // - static_assert-declarations | ||||||||||
1838 | // - using-declarations, | ||||||||||
1839 | // - using-directives, | ||||||||||
1840 | // - using-enum-declaration | ||||||||||
1841 | continue; | ||||||||||
1842 | |||||||||||
1843 | case Decl::Typedef: | ||||||||||
1844 | case Decl::TypeAlias: { | ||||||||||
1845 | // - typedef declarations and alias-declarations that do not define | ||||||||||
1846 | // classes or enumerations, | ||||||||||
1847 | const auto *TN = cast<TypedefNameDecl>(DclIt); | ||||||||||
1848 | if (TN->getUnderlyingType()->isVariablyModifiedType()) { | ||||||||||
1849 | // Don't allow variably-modified types in constexpr functions. | ||||||||||
1850 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
1851 | TypeLoc TL = TN->getTypeSourceInfo()->getTypeLoc(); | ||||||||||
1852 | SemaRef.Diag(TL.getBeginLoc(), diag::err_constexpr_vla) | ||||||||||
1853 | << TL.getSourceRange() << TL.getType() | ||||||||||
1854 | << isa<CXXConstructorDecl>(Dcl); | ||||||||||
1855 | } | ||||||||||
1856 | return false; | ||||||||||
1857 | } | ||||||||||
1858 | continue; | ||||||||||
1859 | } | ||||||||||
1860 | |||||||||||
1861 | case Decl::Enum: | ||||||||||
1862 | case Decl::CXXRecord: | ||||||||||
1863 | // C++1y allows types to be defined, not just declared. | ||||||||||
1864 | if (cast<TagDecl>(DclIt)->isThisDeclarationADefinition()) { | ||||||||||
1865 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
1866 | SemaRef.Diag(DS->getBeginLoc(), | ||||||||||
1867 | SemaRef.getLangOpts().CPlusPlus14 | ||||||||||
1868 | ? diag::warn_cxx11_compat_constexpr_type_definition | ||||||||||
1869 | : diag::ext_constexpr_type_definition) | ||||||||||
1870 | << isa<CXXConstructorDecl>(Dcl); | ||||||||||
1871 | } else if (!SemaRef.getLangOpts().CPlusPlus14) { | ||||||||||
1872 | return false; | ||||||||||
1873 | } | ||||||||||
1874 | } | ||||||||||
1875 | continue; | ||||||||||
1876 | |||||||||||
1877 | case Decl::EnumConstant: | ||||||||||
1878 | case Decl::IndirectField: | ||||||||||
1879 | case Decl::ParmVar: | ||||||||||
1880 | // These can only appear with other declarations which are banned in | ||||||||||
1881 | // C++11 and permitted in C++1y, so ignore them. | ||||||||||
1882 | continue; | ||||||||||
1883 | |||||||||||
1884 | case Decl::Var: | ||||||||||
1885 | case Decl::Decomposition: { | ||||||||||
1886 | // C++1y [dcl.constexpr]p3 allows anything except: | ||||||||||
1887 | // a definition of a variable of non-literal type or of static or | ||||||||||
1888 | // thread storage duration or [before C++2a] for which no | ||||||||||
1889 | // initialization is performed. | ||||||||||
1890 | const auto *VD = cast<VarDecl>(DclIt); | ||||||||||
1891 | if (VD->isThisDeclarationADefinition()) { | ||||||||||
1892 | if (VD->isStaticLocal()) { | ||||||||||
1893 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
1894 | SemaRef.Diag(VD->getLocation(), | ||||||||||
1895 | diag::err_constexpr_local_var_static) | ||||||||||
1896 | << isa<CXXConstructorDecl>(Dcl) | ||||||||||
1897 | << (VD->getTLSKind() == VarDecl::TLS_Dynamic); | ||||||||||
1898 | } | ||||||||||
1899 | return false; | ||||||||||
1900 | } | ||||||||||
1901 | if (CheckLiteralType(SemaRef, Kind, VD->getLocation(), VD->getType(), | ||||||||||
1902 | diag::err_constexpr_local_var_non_literal_type, | ||||||||||
1903 | isa<CXXConstructorDecl>(Dcl))) | ||||||||||
1904 | return false; | ||||||||||
1905 | if (!VD->getType()->isDependentType() && | ||||||||||
1906 | !VD->hasInit() && !VD->isCXXForRangeDecl()) { | ||||||||||
1907 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
1908 | SemaRef.Diag( | ||||||||||
1909 | VD->getLocation(), | ||||||||||
1910 | SemaRef.getLangOpts().CPlusPlus20 | ||||||||||
1911 | ? diag::warn_cxx17_compat_constexpr_local_var_no_init | ||||||||||
1912 | : diag::ext_constexpr_local_var_no_init) | ||||||||||
1913 | << isa<CXXConstructorDecl>(Dcl); | ||||||||||
1914 | } else if (!SemaRef.getLangOpts().CPlusPlus20) { | ||||||||||
1915 | return false; | ||||||||||
1916 | } | ||||||||||
1917 | continue; | ||||||||||
1918 | } | ||||||||||
1919 | } | ||||||||||
1920 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
1921 | SemaRef.Diag(VD->getLocation(), | ||||||||||
1922 | SemaRef.getLangOpts().CPlusPlus14 | ||||||||||
1923 | ? diag::warn_cxx11_compat_constexpr_local_var | ||||||||||
1924 | : diag::ext_constexpr_local_var) | ||||||||||
1925 | << isa<CXXConstructorDecl>(Dcl); | ||||||||||
1926 | } else if (!SemaRef.getLangOpts().CPlusPlus14) { | ||||||||||
1927 | return false; | ||||||||||
1928 | } | ||||||||||
1929 | continue; | ||||||||||
1930 | } | ||||||||||
1931 | |||||||||||
1932 | case Decl::NamespaceAlias: | ||||||||||
1933 | case Decl::Function: | ||||||||||
1934 | // These are disallowed in C++11 and permitted in C++1y. Allow them | ||||||||||
1935 | // everywhere as an extension. | ||||||||||
1936 | if (!Cxx1yLoc.isValid()) | ||||||||||
1937 | Cxx1yLoc = DS->getBeginLoc(); | ||||||||||
1938 | continue; | ||||||||||
1939 | |||||||||||
1940 | default: | ||||||||||
1941 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
1942 | SemaRef.Diag(DS->getBeginLoc(), diag::err_constexpr_body_invalid_stmt) | ||||||||||
1943 | << isa<CXXConstructorDecl>(Dcl) << Dcl->isConsteval(); | ||||||||||
1944 | } | ||||||||||
1945 | return false; | ||||||||||
1946 | } | ||||||||||
1947 | } | ||||||||||
1948 | |||||||||||
1949 | return true; | ||||||||||
1950 | } | ||||||||||
1951 | |||||||||||
1952 | /// Check that the given field is initialized within a constexpr constructor. | ||||||||||
1953 | /// | ||||||||||
1954 | /// \param Dcl The constexpr constructor being checked. | ||||||||||
1955 | /// \param Field The field being checked. This may be a member of an anonymous | ||||||||||
1956 | /// struct or union nested within the class being checked. | ||||||||||
1957 | /// \param Inits All declarations, including anonymous struct/union members and | ||||||||||
1958 | /// indirect members, for which any initialization was provided. | ||||||||||
1959 | /// \param Diagnosed Whether we've emitted the error message yet. Used to attach | ||||||||||
1960 | /// multiple notes for different members to the same error. | ||||||||||
1961 | /// \param Kind Whether we're diagnosing a constructor as written or determining | ||||||||||
1962 | /// whether the formal requirements are satisfied. | ||||||||||
1963 | /// \return \c false if we're checking for validity and the constructor does | ||||||||||
1964 | /// not satisfy the requirements on a constexpr constructor. | ||||||||||
1965 | static bool CheckConstexprCtorInitializer(Sema &SemaRef, | ||||||||||
1966 | const FunctionDecl *Dcl, | ||||||||||
1967 | FieldDecl *Field, | ||||||||||
1968 | llvm::SmallSet<Decl*, 16> &Inits, | ||||||||||
1969 | bool &Diagnosed, | ||||||||||
1970 | Sema::CheckConstexprKind Kind) { | ||||||||||
1971 | // In C++20 onwards, there's nothing to check for validity. | ||||||||||
1972 | if (Kind == Sema::CheckConstexprKind::CheckValid && | ||||||||||
1973 | SemaRef.getLangOpts().CPlusPlus20) | ||||||||||
1974 | return true; | ||||||||||
1975 | |||||||||||
1976 | if (Field->isInvalidDecl()) | ||||||||||
1977 | return true; | ||||||||||
1978 | |||||||||||
1979 | if (Field->isUnnamedBitfield()) | ||||||||||
1980 | return true; | ||||||||||
1981 | |||||||||||
1982 | // Anonymous unions with no variant members and empty anonymous structs do not | ||||||||||
1983 | // need to be explicitly initialized. FIXME: Anonymous structs that contain no | ||||||||||
1984 | // indirect fields don't need initializing. | ||||||||||
1985 | if (Field->isAnonymousStructOrUnion() && | ||||||||||
1986 | (Field->getType()->isUnionType() | ||||||||||
1987 | ? !Field->getType()->getAsCXXRecordDecl()->hasVariantMembers() | ||||||||||
1988 | : Field->getType()->getAsCXXRecordDecl()->isEmpty())) | ||||||||||
1989 | return true; | ||||||||||
1990 | |||||||||||
1991 | if (!Inits.count(Field)) { | ||||||||||
1992 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
1993 | if (!Diagnosed) { | ||||||||||
1994 | SemaRef.Diag(Dcl->getLocation(), | ||||||||||
1995 | SemaRef.getLangOpts().CPlusPlus20 | ||||||||||
1996 | ? diag::warn_cxx17_compat_constexpr_ctor_missing_init | ||||||||||
1997 | : diag::ext_constexpr_ctor_missing_init); | ||||||||||
1998 | Diagnosed = true; | ||||||||||
1999 | } | ||||||||||
2000 | SemaRef.Diag(Field->getLocation(), | ||||||||||
2001 | diag::note_constexpr_ctor_missing_init); | ||||||||||
2002 | } else if (!SemaRef.getLangOpts().CPlusPlus20) { | ||||||||||
2003 | return false; | ||||||||||
2004 | } | ||||||||||
2005 | } else if (Field->isAnonymousStructOrUnion()) { | ||||||||||
2006 | const RecordDecl *RD = Field->getType()->castAs<RecordType>()->getDecl(); | ||||||||||
2007 | for (auto *I : RD->fields()) | ||||||||||
2008 | // If an anonymous union contains an anonymous struct of which any member | ||||||||||
2009 | // is initialized, all members must be initialized. | ||||||||||
2010 | if (!RD->isUnion() || Inits.count(I)) | ||||||||||
2011 | if (!CheckConstexprCtorInitializer(SemaRef, Dcl, I, Inits, Diagnosed, | ||||||||||
2012 | Kind)) | ||||||||||
2013 | return false; | ||||||||||
2014 | } | ||||||||||
2015 | return true; | ||||||||||
2016 | } | ||||||||||
2017 | |||||||||||
2018 | /// Check the provided statement is allowed in a constexpr function | ||||||||||
2019 | /// definition. | ||||||||||
2020 | static bool | ||||||||||
2021 | CheckConstexprFunctionStmt(Sema &SemaRef, const FunctionDecl *Dcl, Stmt *S, | ||||||||||
2022 | SmallVectorImpl<SourceLocation> &ReturnStmts, | ||||||||||
2023 | SourceLocation &Cxx1yLoc, SourceLocation &Cxx2aLoc, | ||||||||||
2024 | Sema::CheckConstexprKind Kind) { | ||||||||||
2025 | // - its function-body shall be [...] a compound-statement that contains only | ||||||||||
2026 | switch (S->getStmtClass()) { | ||||||||||
2027 | case Stmt::NullStmtClass: | ||||||||||
2028 | // - null statements, | ||||||||||
2029 | return true; | ||||||||||
2030 | |||||||||||
2031 | case Stmt::DeclStmtClass: | ||||||||||
2032 | // - static_assert-declarations | ||||||||||
2033 | // - using-declarations, | ||||||||||
2034 | // - using-directives, | ||||||||||
2035 | // - typedef declarations and alias-declarations that do not define | ||||||||||
2036 | // classes or enumerations, | ||||||||||
2037 | if (!CheckConstexprDeclStmt(SemaRef, Dcl, cast<DeclStmt>(S), Cxx1yLoc, Kind)) | ||||||||||
2038 | return false; | ||||||||||
2039 | return true; | ||||||||||
2040 | |||||||||||
2041 | case Stmt::ReturnStmtClass: | ||||||||||
2042 | // - and exactly one return statement; | ||||||||||
2043 | if (isa<CXXConstructorDecl>(Dcl)) { | ||||||||||
2044 | // C++1y allows return statements in constexpr constructors. | ||||||||||
2045 | if (!Cxx1yLoc.isValid()) | ||||||||||
2046 | Cxx1yLoc = S->getBeginLoc(); | ||||||||||
2047 | return true; | ||||||||||
2048 | } | ||||||||||
2049 | |||||||||||
2050 | ReturnStmts.push_back(S->getBeginLoc()); | ||||||||||
2051 | return true; | ||||||||||
2052 | |||||||||||
2053 | case Stmt::CompoundStmtClass: { | ||||||||||
2054 | // C++1y allows compound-statements. | ||||||||||
2055 | if (!Cxx1yLoc.isValid()) | ||||||||||
2056 | Cxx1yLoc = S->getBeginLoc(); | ||||||||||
2057 | |||||||||||
2058 | CompoundStmt *CompStmt = cast<CompoundStmt>(S); | ||||||||||
2059 | for (auto *BodyIt : CompStmt->body()) { | ||||||||||
2060 | if (!CheckConstexprFunctionStmt(SemaRef, Dcl, BodyIt, ReturnStmts, | ||||||||||
2061 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||||||
2062 | return false; | ||||||||||
2063 | } | ||||||||||
2064 | return true; | ||||||||||
2065 | } | ||||||||||
2066 | |||||||||||
2067 | case Stmt::AttributedStmtClass: | ||||||||||
2068 | if (!Cxx1yLoc.isValid()) | ||||||||||
2069 | Cxx1yLoc = S->getBeginLoc(); | ||||||||||
2070 | return true; | ||||||||||
2071 | |||||||||||
2072 | case Stmt::IfStmtClass: { | ||||||||||
2073 | // C++1y allows if-statements. | ||||||||||
2074 | if (!Cxx1yLoc.isValid()) | ||||||||||
2075 | Cxx1yLoc = S->getBeginLoc(); | ||||||||||
2076 | |||||||||||
2077 | IfStmt *If = cast<IfStmt>(S); | ||||||||||
2078 | if (!CheckConstexprFunctionStmt(SemaRef, Dcl, If->getThen(), ReturnStmts, | ||||||||||
2079 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||||||
2080 | return false; | ||||||||||
2081 | if (If->getElse() && | ||||||||||
2082 | !CheckConstexprFunctionStmt(SemaRef, Dcl, If->getElse(), ReturnStmts, | ||||||||||
2083 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||||||
2084 | return false; | ||||||||||
2085 | return true; | ||||||||||
2086 | } | ||||||||||
2087 | |||||||||||
2088 | case Stmt::WhileStmtClass: | ||||||||||
2089 | case Stmt::DoStmtClass: | ||||||||||
2090 | case Stmt::ForStmtClass: | ||||||||||
2091 | case Stmt::CXXForRangeStmtClass: | ||||||||||
2092 | case Stmt::ContinueStmtClass: | ||||||||||
2093 | // C++1y allows all of these. We don't allow them as extensions in C++11, | ||||||||||
2094 | // because they don't make sense without variable mutation. | ||||||||||
2095 | if (!SemaRef.getLangOpts().CPlusPlus14) | ||||||||||
2096 | break; | ||||||||||
2097 | if (!Cxx1yLoc.isValid()) | ||||||||||
2098 | Cxx1yLoc = S->getBeginLoc(); | ||||||||||
2099 | for (Stmt *SubStmt : S->children()) | ||||||||||
2100 | if (SubStmt && | ||||||||||
2101 | !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts, | ||||||||||
2102 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||||||
2103 | return false; | ||||||||||
2104 | return true; | ||||||||||
2105 | |||||||||||
2106 | case Stmt::SwitchStmtClass: | ||||||||||
2107 | case Stmt::CaseStmtClass: | ||||||||||
2108 | case Stmt::DefaultStmtClass: | ||||||||||
2109 | case Stmt::BreakStmtClass: | ||||||||||
2110 | // C++1y allows switch-statements, and since they don't need variable | ||||||||||
2111 | // mutation, we can reasonably allow them in C++11 as an extension. | ||||||||||
2112 | if (!Cxx1yLoc.isValid()) | ||||||||||
2113 | Cxx1yLoc = S->getBeginLoc(); | ||||||||||
2114 | for (Stmt *SubStmt : S->children()) | ||||||||||
2115 | if (SubStmt && | ||||||||||
2116 | !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts, | ||||||||||
2117 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||||||
2118 | return false; | ||||||||||
2119 | return true; | ||||||||||
2120 | |||||||||||
2121 | case Stmt::GCCAsmStmtClass: | ||||||||||
2122 | case Stmt::MSAsmStmtClass: | ||||||||||
2123 | // C++2a allows inline assembly statements. | ||||||||||
2124 | case Stmt::CXXTryStmtClass: | ||||||||||
2125 | if (Cxx2aLoc.isInvalid()) | ||||||||||
2126 | Cxx2aLoc = S->getBeginLoc(); | ||||||||||
2127 | for (Stmt *SubStmt : S->children()) { | ||||||||||
2128 | if (SubStmt && | ||||||||||
2129 | !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts, | ||||||||||
2130 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||||||
2131 | return false; | ||||||||||
2132 | } | ||||||||||
2133 | return true; | ||||||||||
2134 | |||||||||||
2135 | case Stmt::CXXCatchStmtClass: | ||||||||||
2136 | // Do not bother checking the language mode (already covered by the | ||||||||||
2137 | // try block check). | ||||||||||
2138 | if (!CheckConstexprFunctionStmt(SemaRef, Dcl, | ||||||||||
2139 | cast<CXXCatchStmt>(S)->getHandlerBlock(), | ||||||||||
2140 | ReturnStmts, Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||||||
2141 | return false; | ||||||||||
2142 | return true; | ||||||||||
2143 | |||||||||||
2144 | default: | ||||||||||
2145 | if (!isa<Expr>(S)) | ||||||||||
2146 | break; | ||||||||||
2147 | |||||||||||
2148 | // C++1y allows expression-statements. | ||||||||||
2149 | if (!Cxx1yLoc.isValid()) | ||||||||||
2150 | Cxx1yLoc = S->getBeginLoc(); | ||||||||||
2151 | return true; | ||||||||||
2152 | } | ||||||||||
2153 | |||||||||||
2154 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
2155 | SemaRef.Diag(S->getBeginLoc(), diag::err_constexpr_body_invalid_stmt) | ||||||||||
2156 | << isa<CXXConstructorDecl>(Dcl) << Dcl->isConsteval(); | ||||||||||
2157 | } | ||||||||||
2158 | return false; | ||||||||||
2159 | } | ||||||||||
2160 | |||||||||||
2161 | /// Check the body for the given constexpr function declaration only contains | ||||||||||
2162 | /// the permitted types of statement. C++11 [dcl.constexpr]p3,p4. | ||||||||||
2163 | /// | ||||||||||
2164 | /// \return true if the body is OK, false if we have found or diagnosed a | ||||||||||
2165 | /// problem. | ||||||||||
2166 | static bool CheckConstexprFunctionBody(Sema &SemaRef, const FunctionDecl *Dcl, | ||||||||||
2167 | Stmt *Body, | ||||||||||
2168 | Sema::CheckConstexprKind Kind) { | ||||||||||
2169 | SmallVector<SourceLocation, 4> ReturnStmts; | ||||||||||
2170 | |||||||||||
2171 | if (isa<CXXTryStmt>(Body)) { | ||||||||||
2172 | // C++11 [dcl.constexpr]p3: | ||||||||||
2173 | // The definition of a constexpr function shall satisfy the following | ||||||||||
2174 | // constraints: [...] | ||||||||||
2175 | // - its function-body shall be = delete, = default, or a | ||||||||||
2176 | // compound-statement | ||||||||||
2177 | // | ||||||||||
2178 | // C++11 [dcl.constexpr]p4: | ||||||||||
2179 | // In the definition of a constexpr constructor, [...] | ||||||||||
2180 | // - its function-body shall not be a function-try-block; | ||||||||||
2181 | // | ||||||||||
2182 | // This restriction is lifted in C++2a, as long as inner statements also | ||||||||||
2183 | // apply the general constexpr rules. | ||||||||||
2184 | switch (Kind) { | ||||||||||
2185 | case Sema::CheckConstexprKind::CheckValid: | ||||||||||
2186 | if (!SemaRef.getLangOpts().CPlusPlus20) | ||||||||||
2187 | return false; | ||||||||||
2188 | break; | ||||||||||
2189 | |||||||||||
2190 | case Sema::CheckConstexprKind::Diagnose: | ||||||||||
2191 | SemaRef.Diag(Body->getBeginLoc(), | ||||||||||
2192 | !SemaRef.getLangOpts().CPlusPlus20 | ||||||||||
2193 | ? diag::ext_constexpr_function_try_block_cxx20 | ||||||||||
2194 | : diag::warn_cxx17_compat_constexpr_function_try_block) | ||||||||||
2195 | << isa<CXXConstructorDecl>(Dcl); | ||||||||||
2196 | break; | ||||||||||
2197 | } | ||||||||||
2198 | } | ||||||||||
2199 | |||||||||||
2200 | // - its function-body shall be [...] a compound-statement that contains only | ||||||||||
2201 | // [... list of cases ...] | ||||||||||
2202 | // | ||||||||||
2203 | // Note that walking the children here is enough to properly check for | ||||||||||
2204 | // CompoundStmt and CXXTryStmt body. | ||||||||||
2205 | SourceLocation Cxx1yLoc, Cxx2aLoc; | ||||||||||
2206 | for (Stmt *SubStmt : Body->children()) { | ||||||||||
2207 | if (SubStmt && | ||||||||||
2208 | !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts, | ||||||||||
2209 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||||||
2210 | return false; | ||||||||||
2211 | } | ||||||||||
2212 | |||||||||||
2213 | if (Kind == Sema::CheckConstexprKind::CheckValid) { | ||||||||||
2214 | // If this is only valid as an extension, report that we don't satisfy the | ||||||||||
2215 | // constraints of the current language. | ||||||||||
2216 | if ((Cxx2aLoc.isValid() && !SemaRef.getLangOpts().CPlusPlus20) || | ||||||||||
2217 | (Cxx1yLoc.isValid() && !SemaRef.getLangOpts().CPlusPlus17)) | ||||||||||
2218 | return false; | ||||||||||
2219 | } else if (Cxx2aLoc.isValid()) { | ||||||||||
2220 | SemaRef.Diag(Cxx2aLoc, | ||||||||||
2221 | SemaRef.getLangOpts().CPlusPlus20 | ||||||||||
2222 | ? diag::warn_cxx17_compat_constexpr_body_invalid_stmt | ||||||||||
2223 | : diag::ext_constexpr_body_invalid_stmt_cxx20) | ||||||||||
2224 | << isa<CXXConstructorDecl>(Dcl); | ||||||||||
2225 | } else if (Cxx1yLoc.isValid()) { | ||||||||||
2226 | SemaRef.Diag(Cxx1yLoc, | ||||||||||
2227 | SemaRef.getLangOpts().CPlusPlus14 | ||||||||||
2228 | ? diag::warn_cxx11_compat_constexpr_body_invalid_stmt | ||||||||||
2229 | : diag::ext_constexpr_body_invalid_stmt) | ||||||||||
2230 | << isa<CXXConstructorDecl>(Dcl); | ||||||||||
2231 | } | ||||||||||
2232 | |||||||||||
2233 | if (const CXXConstructorDecl *Constructor | ||||||||||
2234 | = dyn_cast<CXXConstructorDecl>(Dcl)) { | ||||||||||
2235 | const CXXRecordDecl *RD = Constructor->getParent(); | ||||||||||
2236 | // DR1359: | ||||||||||
2237 | // - every non-variant non-static data member and base class sub-object | ||||||||||
2238 | // shall be initialized; | ||||||||||
2239 | // DR1460: | ||||||||||
2240 | // - if the class is a union having variant members, exactly one of them | ||||||||||
2241 | // shall be initialized; | ||||||||||
2242 | if (RD->isUnion()) { | ||||||||||
2243 | if (Constructor->getNumCtorInitializers() == 0 && | ||||||||||
2244 | RD->hasVariantMembers()) { | ||||||||||
2245 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||||||
2246 | SemaRef.Diag( | ||||||||||
2247 | Dcl->getLocation(), | ||||||||||
2248 | SemaRef.getLangOpts().CPlusPlus20 | ||||||||||
2249 | ? diag::warn_cxx17_compat_constexpr_union_ctor_no_init | ||||||||||
2250 | : diag::ext_constexpr_union_ctor_no_init); | ||||||||||
2251 | } else if (!SemaRef.getLangOpts().CPlusPlus20) { | ||||||||||
2252 | return false; | ||||||||||
2253 | } | ||||||||||
2254 | } | ||||||||||
2255 | } else if (!Constructor->isDependentContext() && | ||||||||||
2256 | !Constructor->isDelegatingConstructor()) { | ||||||||||
2257 | assert(RD->getNumVBases() == 0 && "constexpr ctor with virtual bases")(static_cast <bool> (RD->getNumVBases() == 0 && "constexpr ctor with virtual bases") ? void (0) : __assert_fail ("RD->getNumVBases() == 0 && \"constexpr ctor with virtual bases\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2257, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2258 | |||||||||||
2259 | // Skip detailed checking if we have enough initializers, and we would | ||||||||||
2260 | // allow at most one initializer per member. | ||||||||||
2261 | bool AnyAnonStructUnionMembers = false; | ||||||||||
2262 | unsigned Fields = 0; | ||||||||||
2263 | for (CXXRecordDecl::field_iterator I = RD->field_begin(), | ||||||||||
2264 | E = RD->field_end(); I != E; ++I, ++Fields) { | ||||||||||
2265 | if (I->isAnonymousStructOrUnion()) { | ||||||||||
2266 | AnyAnonStructUnionMembers = true; | ||||||||||
2267 | break; | ||||||||||
2268 | } | ||||||||||
2269 | } | ||||||||||
2270 | // DR1460: | ||||||||||
2271 | // - if the class is a union-like class, but is not a union, for each of | ||||||||||
2272 | // its anonymous union members having variant members, exactly one of | ||||||||||
2273 | // them shall be initialized; | ||||||||||
2274 | if (AnyAnonStructUnionMembers || | ||||||||||
2275 | Constructor->getNumCtorInitializers() != RD->getNumBases() + Fields) { | ||||||||||
2276 | // Check initialization of non-static data members. Base classes are | ||||||||||
2277 | // always initialized so do not need to be checked. Dependent bases | ||||||||||
2278 | // might not have initializers in the member initializer list. | ||||||||||
2279 | llvm::SmallSet<Decl*, 16> Inits; | ||||||||||
2280 | for (const auto *I: Constructor->inits()) { | ||||||||||
2281 | if (FieldDecl *FD = I->getMember()) | ||||||||||
2282 | Inits.insert(FD); | ||||||||||
2283 | else if (IndirectFieldDecl *ID = I->getIndirectMember()) | ||||||||||
2284 | Inits.insert(ID->chain_begin(), ID->chain_end()); | ||||||||||
2285 | } | ||||||||||
2286 | |||||||||||
2287 | bool Diagnosed = false; | ||||||||||
2288 | for (auto *I : RD->fields()) | ||||||||||
2289 | if (!CheckConstexprCtorInitializer(SemaRef, Dcl, I, Inits, Diagnosed, | ||||||||||
2290 | Kind)) | ||||||||||
2291 | return false; | ||||||||||
2292 | } | ||||||||||
2293 | } | ||||||||||
2294 | } else { | ||||||||||
2295 | if (ReturnStmts.empty()) { | ||||||||||
2296 | // C++1y doesn't require constexpr functions to contain a 'return' | ||||||||||
2297 | // statement. We still do, unless the return type might be void, because | ||||||||||
2298 | // otherwise if there's no return statement, the function cannot | ||||||||||
2299 | // be used in a core constant expression. | ||||||||||
2300 | bool OK = SemaRef.getLangOpts().CPlusPlus14 && | ||||||||||
2301 | (Dcl->getReturnType()->isVoidType() || | ||||||||||
2302 | Dcl->getReturnType()->isDependentType()); | ||||||||||
2303 | switch (Kind) { | ||||||||||
2304 | case Sema::CheckConstexprKind::Diagnose: | ||||||||||
2305 | SemaRef.Diag(Dcl->getLocation(), | ||||||||||
2306 | OK ? diag::warn_cxx11_compat_constexpr_body_no_return | ||||||||||
2307 | : diag::err_constexpr_body_no_return) | ||||||||||
2308 | << Dcl->isConsteval(); | ||||||||||
2309 | if (!OK) | ||||||||||
2310 | return false; | ||||||||||
2311 | break; | ||||||||||
2312 | |||||||||||
2313 | case Sema::CheckConstexprKind::CheckValid: | ||||||||||
2314 | // The formal requirements don't include this rule in C++14, even | ||||||||||
2315 | // though the "must be able to produce a constant expression" rules | ||||||||||
2316 | // still imply it in some cases. | ||||||||||
2317 | if (!SemaRef.getLangOpts().CPlusPlus14) | ||||||||||
2318 | return false; | ||||||||||
2319 | break; | ||||||||||
2320 | } | ||||||||||
2321 | } else if (ReturnStmts.size() > 1) { | ||||||||||
2322 | switch (Kind) { | ||||||||||
2323 | case Sema::CheckConstexprKind::Diagnose: | ||||||||||
2324 | SemaRef.Diag( | ||||||||||
2325 | ReturnStmts.back(), | ||||||||||
2326 | SemaRef.getLangOpts().CPlusPlus14 | ||||||||||
2327 | ? diag::warn_cxx11_compat_constexpr_body_multiple_return | ||||||||||
2328 | : diag::ext_constexpr_body_multiple_return); | ||||||||||
2329 | for (unsigned I = 0; I < ReturnStmts.size() - 1; ++I) | ||||||||||
2330 | SemaRef.Diag(ReturnStmts[I], | ||||||||||
2331 | diag::note_constexpr_body_previous_return); | ||||||||||
2332 | break; | ||||||||||
2333 | |||||||||||
2334 | case Sema::CheckConstexprKind::CheckValid: | ||||||||||
2335 | if (!SemaRef.getLangOpts().CPlusPlus14) | ||||||||||
2336 | return false; | ||||||||||
2337 | break; | ||||||||||
2338 | } | ||||||||||
2339 | } | ||||||||||
2340 | } | ||||||||||
2341 | |||||||||||
2342 | // C++11 [dcl.constexpr]p5: | ||||||||||
2343 | // if no function argument values exist such that the function invocation | ||||||||||
2344 | // substitution would produce a constant expression, the program is | ||||||||||
2345 | // ill-formed; no diagnostic required. | ||||||||||
2346 | // C++11 [dcl.constexpr]p3: | ||||||||||
2347 | // - every constructor call and implicit conversion used in initializing the | ||||||||||
2348 | // return value shall be one of those allowed in a constant expression. | ||||||||||
2349 | // C++11 [dcl.constexpr]p4: | ||||||||||
2350 | // - every constructor involved in initializing non-static data members and | ||||||||||
2351 | // base class sub-objects shall be a constexpr constructor. | ||||||||||
2352 | // | ||||||||||
2353 | // Note that this rule is distinct from the "requirements for a constexpr | ||||||||||
2354 | // function", so is not checked in CheckValid mode. | ||||||||||
2355 | SmallVector<PartialDiagnosticAt, 8> Diags; | ||||||||||
2356 | if (Kind == Sema::CheckConstexprKind::Diagnose && | ||||||||||
2357 | !Expr::isPotentialConstantExpr(Dcl, Diags)) { | ||||||||||
2358 | SemaRef.Diag(Dcl->getLocation(), | ||||||||||
2359 | diag::ext_constexpr_function_never_constant_expr) | ||||||||||
2360 | << isa<CXXConstructorDecl>(Dcl) << Dcl->isConsteval(); | ||||||||||
2361 | for (size_t I = 0, N = Diags.size(); I != N; ++I) | ||||||||||
2362 | SemaRef.Diag(Diags[I].first, Diags[I].second); | ||||||||||
2363 | // Don't return false here: we allow this for compatibility in | ||||||||||
2364 | // system headers. | ||||||||||
2365 | } | ||||||||||
2366 | |||||||||||
2367 | return true; | ||||||||||
2368 | } | ||||||||||
2369 | |||||||||||
2370 | /// Get the class that is directly named by the current context. This is the | ||||||||||
2371 | /// class for which an unqualified-id in this scope could name a constructor | ||||||||||
2372 | /// or destructor. | ||||||||||
2373 | /// | ||||||||||
2374 | /// If the scope specifier denotes a class, this will be that class. | ||||||||||
2375 | /// If the scope specifier is empty, this will be the class whose | ||||||||||
2376 | /// member-specification we are currently within. Otherwise, there | ||||||||||
2377 | /// is no such class. | ||||||||||
2378 | CXXRecordDecl *Sema::getCurrentClass(Scope *, const CXXScopeSpec *SS) { | ||||||||||
2379 | assert(getLangOpts().CPlusPlus && "No class names in C!")(static_cast <bool> (getLangOpts().CPlusPlus && "No class names in C!") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"No class names in C!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2379, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2380 | |||||||||||
2381 | if (SS && SS->isInvalid()) | ||||||||||
2382 | return nullptr; | ||||||||||
2383 | |||||||||||
2384 | if (SS && SS->isNotEmpty()) { | ||||||||||
2385 | DeclContext *DC = computeDeclContext(*SS, true); | ||||||||||
2386 | return dyn_cast_or_null<CXXRecordDecl>(DC); | ||||||||||
2387 | } | ||||||||||
2388 | |||||||||||
2389 | return dyn_cast_or_null<CXXRecordDecl>(CurContext); | ||||||||||
2390 | } | ||||||||||
2391 | |||||||||||
2392 | /// isCurrentClassName - Determine whether the identifier II is the | ||||||||||
2393 | /// name of the class type currently being defined. In the case of | ||||||||||
2394 | /// nested classes, this will only return true if II is the name of | ||||||||||
2395 | /// the innermost class. | ||||||||||
2396 | bool Sema::isCurrentClassName(const IdentifierInfo &II, Scope *S, | ||||||||||
2397 | const CXXScopeSpec *SS) { | ||||||||||
2398 | CXXRecordDecl *CurDecl = getCurrentClass(S, SS); | ||||||||||
2399 | return CurDecl && &II == CurDecl->getIdentifier(); | ||||||||||
2400 | } | ||||||||||
2401 | |||||||||||
2402 | /// Determine whether the identifier II is a typo for the name of | ||||||||||
2403 | /// the class type currently being defined. If so, update it to the identifier | ||||||||||
2404 | /// that should have been used. | ||||||||||
2405 | bool Sema::isCurrentClassNameTypo(IdentifierInfo *&II, const CXXScopeSpec *SS) { | ||||||||||
2406 | assert(getLangOpts().CPlusPlus && "No class names in C!")(static_cast <bool> (getLangOpts().CPlusPlus && "No class names in C!") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"No class names in C!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2406, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2407 | |||||||||||
2408 | if (!getLangOpts().SpellChecking) | ||||||||||
2409 | return false; | ||||||||||
2410 | |||||||||||
2411 | CXXRecordDecl *CurDecl; | ||||||||||
2412 | if (SS && SS->isSet() && !SS->isInvalid()) { | ||||||||||
2413 | DeclContext *DC = computeDeclContext(*SS, true); | ||||||||||
2414 | CurDecl = dyn_cast_or_null<CXXRecordDecl>(DC); | ||||||||||
2415 | } else | ||||||||||
2416 | CurDecl = dyn_cast_or_null<CXXRecordDecl>(CurContext); | ||||||||||
2417 | |||||||||||
2418 | if (CurDecl && CurDecl->getIdentifier() && II != CurDecl->getIdentifier() && | ||||||||||
2419 | 3 * II->getName().edit_distance(CurDecl->getIdentifier()->getName()) | ||||||||||
2420 | < II->getLength()) { | ||||||||||
2421 | II = CurDecl->getIdentifier(); | ||||||||||
2422 | return true; | ||||||||||
2423 | } | ||||||||||
2424 | |||||||||||
2425 | return false; | ||||||||||
2426 | } | ||||||||||
2427 | |||||||||||
2428 | /// Determine whether the given class is a base class of the given | ||||||||||
2429 | /// class, including looking at dependent bases. | ||||||||||
2430 | static bool findCircularInheritance(const CXXRecordDecl *Class, | ||||||||||
2431 | const CXXRecordDecl *Current) { | ||||||||||
2432 | SmallVector<const CXXRecordDecl*, 8> Queue; | ||||||||||
2433 | |||||||||||
2434 | Class = Class->getCanonicalDecl(); | ||||||||||
2435 | while (true) { | ||||||||||
2436 | for (const auto &I : Current->bases()) { | ||||||||||
2437 | CXXRecordDecl *Base = I.getType()->getAsCXXRecordDecl(); | ||||||||||
2438 | if (!Base) | ||||||||||
2439 | continue; | ||||||||||
2440 | |||||||||||
2441 | Base = Base->getDefinition(); | ||||||||||
2442 | if (!Base) | ||||||||||
2443 | continue; | ||||||||||
2444 | |||||||||||
2445 | if (Base->getCanonicalDecl() == Class) | ||||||||||
2446 | return true; | ||||||||||
2447 | |||||||||||
2448 | Queue.push_back(Base); | ||||||||||
2449 | } | ||||||||||
2450 | |||||||||||
2451 | if (Queue.empty()) | ||||||||||
2452 | return false; | ||||||||||
2453 | |||||||||||
2454 | Current = Queue.pop_back_val(); | ||||||||||
2455 | } | ||||||||||
2456 | |||||||||||
2457 | return false; | ||||||||||
2458 | } | ||||||||||
2459 | |||||||||||
2460 | /// Check the validity of a C++ base class specifier. | ||||||||||
2461 | /// | ||||||||||
2462 | /// \returns a new CXXBaseSpecifier if well-formed, emits diagnostics | ||||||||||
2463 | /// and returns NULL otherwise. | ||||||||||
2464 | CXXBaseSpecifier * | ||||||||||
2465 | Sema::CheckBaseSpecifier(CXXRecordDecl *Class, | ||||||||||
2466 | SourceRange SpecifierRange, | ||||||||||
2467 | bool Virtual, AccessSpecifier Access, | ||||||||||
2468 | TypeSourceInfo *TInfo, | ||||||||||
2469 | SourceLocation EllipsisLoc) { | ||||||||||
2470 | QualType BaseType = TInfo->getType(); | ||||||||||
2471 | if (BaseType->containsErrors()) { | ||||||||||
2472 | // Already emitted a diagnostic when parsing the error type. | ||||||||||
2473 | return nullptr; | ||||||||||
2474 | } | ||||||||||
2475 | // C++ [class.union]p1: | ||||||||||
2476 | // A union shall not have base classes. | ||||||||||
2477 | if (Class->isUnion()) { | ||||||||||
2478 | Diag(Class->getLocation(), diag::err_base_clause_on_union) | ||||||||||
2479 | << SpecifierRange; | ||||||||||
2480 | return nullptr; | ||||||||||
2481 | } | ||||||||||
2482 | |||||||||||
2483 | if (EllipsisLoc.isValid() && | ||||||||||
2484 | !TInfo->getType()->containsUnexpandedParameterPack()) { | ||||||||||
2485 | Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | ||||||||||
2486 | << TInfo->getTypeLoc().getSourceRange(); | ||||||||||
2487 | EllipsisLoc = SourceLocation(); | ||||||||||
2488 | } | ||||||||||
2489 | |||||||||||
2490 | SourceLocation BaseLoc = TInfo->getTypeLoc().getBeginLoc(); | ||||||||||
2491 | |||||||||||
2492 | if (BaseType->isDependentType()) { | ||||||||||
2493 | // Make sure that we don't have circular inheritance among our dependent | ||||||||||
2494 | // bases. For non-dependent bases, the check for completeness below handles | ||||||||||
2495 | // this. | ||||||||||
2496 | if (CXXRecordDecl *BaseDecl = BaseType->getAsCXXRecordDecl()) { | ||||||||||
2497 | if (BaseDecl->getCanonicalDecl() == Class->getCanonicalDecl() || | ||||||||||
2498 | ((BaseDecl = BaseDecl->getDefinition()) && | ||||||||||
2499 | findCircularInheritance(Class, BaseDecl))) { | ||||||||||
2500 | Diag(BaseLoc, diag::err_circular_inheritance) | ||||||||||
2501 | << BaseType << Context.getTypeDeclType(Class); | ||||||||||
2502 | |||||||||||
2503 | if (BaseDecl->getCanonicalDecl() != Class->getCanonicalDecl()) | ||||||||||
2504 | Diag(BaseDecl->getLocation(), diag::note_previous_decl) | ||||||||||
2505 | << BaseType; | ||||||||||
2506 | |||||||||||
2507 | return nullptr; | ||||||||||
2508 | } | ||||||||||
2509 | } | ||||||||||
2510 | |||||||||||
2511 | // Make sure that we don't make an ill-formed AST where the type of the | ||||||||||
2512 | // Class is non-dependent and its attached base class specifier is an | ||||||||||
2513 | // dependent type, which violates invariants in many clang code paths (e.g. | ||||||||||
2514 | // constexpr evaluator). If this case happens (in errory-recovery mode), we | ||||||||||
2515 | // explicitly mark the Class decl invalid. The diagnostic was already | ||||||||||
2516 | // emitted. | ||||||||||
2517 | if (!Class->getTypeForDecl()->isDependentType()) | ||||||||||
2518 | Class->setInvalidDecl(); | ||||||||||
2519 | return new (Context) CXXBaseSpecifier(SpecifierRange, Virtual, | ||||||||||
2520 | Class->getTagKind() == TTK_Class, | ||||||||||
2521 | Access, TInfo, EllipsisLoc); | ||||||||||
2522 | } | ||||||||||
2523 | |||||||||||
2524 | // Base specifiers must be record types. | ||||||||||
2525 | if (!BaseType->isRecordType()) { | ||||||||||
2526 | Diag(BaseLoc, diag::err_base_must_be_class) << SpecifierRange; | ||||||||||
2527 | return nullptr; | ||||||||||
2528 | } | ||||||||||
2529 | |||||||||||
2530 | // C++ [class.union]p1: | ||||||||||
2531 | // A union shall not be used as a base class. | ||||||||||
2532 | if (BaseType->isUnionType()) { | ||||||||||
2533 | Diag(BaseLoc, diag::err_union_as_base_class) << SpecifierRange; | ||||||||||
2534 | return nullptr; | ||||||||||
2535 | } | ||||||||||
2536 | |||||||||||
2537 | // For the MS ABI, propagate DLL attributes to base class templates. | ||||||||||
2538 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||||||
2539 | if (Attr *ClassAttr = getDLLAttr(Class)) { | ||||||||||
2540 | if (auto *BaseTemplate = dyn_cast_or_null<ClassTemplateSpecializationDecl>( | ||||||||||
2541 | BaseType->getAsCXXRecordDecl())) { | ||||||||||
2542 | propagateDLLAttrToBaseClassTemplate(Class, ClassAttr, BaseTemplate, | ||||||||||
2543 | BaseLoc); | ||||||||||
2544 | } | ||||||||||
2545 | } | ||||||||||
2546 | } | ||||||||||
2547 | |||||||||||
2548 | // C++ [class.derived]p2: | ||||||||||
2549 | // The class-name in a base-specifier shall not be an incompletely | ||||||||||
2550 | // defined class. | ||||||||||
2551 | if (RequireCompleteType(BaseLoc, BaseType, | ||||||||||
2552 | diag::err_incomplete_base_class, SpecifierRange)) { | ||||||||||
2553 | Class->setInvalidDecl(); | ||||||||||
2554 | return nullptr; | ||||||||||
2555 | } | ||||||||||
2556 | |||||||||||
2557 | // If the base class is polymorphic or isn't empty, the new one is/isn't, too. | ||||||||||
2558 | RecordDecl *BaseDecl = BaseType->castAs<RecordType>()->getDecl(); | ||||||||||
2559 | assert(BaseDecl && "Record type has no declaration")(static_cast <bool> (BaseDecl && "Record type has no declaration" ) ? void (0) : __assert_fail ("BaseDecl && \"Record type has no declaration\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2559, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2560 | BaseDecl = BaseDecl->getDefinition(); | ||||||||||
2561 | assert(BaseDecl && "Base type is not incomplete, but has no definition")(static_cast <bool> (BaseDecl && "Base type is not incomplete, but has no definition" ) ? void (0) : __assert_fail ("BaseDecl && \"Base type is not incomplete, but has no definition\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2561, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2562 | CXXRecordDecl *CXXBaseDecl = cast<CXXRecordDecl>(BaseDecl); | ||||||||||
2563 | assert(CXXBaseDecl && "Base type is not a C++ type")(static_cast <bool> (CXXBaseDecl && "Base type is not a C++ type" ) ? void (0) : __assert_fail ("CXXBaseDecl && \"Base type is not a C++ type\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2563, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2564 | |||||||||||
2565 | // Microsoft docs say: | ||||||||||
2566 | // "If a base-class has a code_seg attribute, derived classes must have the | ||||||||||
2567 | // same attribute." | ||||||||||
2568 | const auto *BaseCSA = CXXBaseDecl->getAttr<CodeSegAttr>(); | ||||||||||
2569 | const auto *DerivedCSA = Class->getAttr<CodeSegAttr>(); | ||||||||||
2570 | if ((DerivedCSA || BaseCSA) && | ||||||||||
2571 | (!BaseCSA || !DerivedCSA || BaseCSA->getName() != DerivedCSA->getName())) { | ||||||||||
2572 | Diag(Class->getLocation(), diag::err_mismatched_code_seg_base); | ||||||||||
2573 | Diag(CXXBaseDecl->getLocation(), diag::note_base_class_specified_here) | ||||||||||
2574 | << CXXBaseDecl; | ||||||||||
2575 | return nullptr; | ||||||||||
2576 | } | ||||||||||
2577 | |||||||||||
2578 | // A class which contains a flexible array member is not suitable for use as a | ||||||||||
2579 | // base class: | ||||||||||
2580 | // - If the layout determines that a base comes before another base, | ||||||||||
2581 | // the flexible array member would index into the subsequent base. | ||||||||||
2582 | // - If the layout determines that base comes before the derived class, | ||||||||||
2583 | // the flexible array member would index into the derived class. | ||||||||||
2584 | if (CXXBaseDecl->hasFlexibleArrayMember()) { | ||||||||||
2585 | Diag(BaseLoc, diag::err_base_class_has_flexible_array_member) | ||||||||||
2586 | << CXXBaseDecl->getDeclName(); | ||||||||||
2587 | return nullptr; | ||||||||||
2588 | } | ||||||||||
2589 | |||||||||||
2590 | // C++ [class]p3: | ||||||||||
2591 | // If a class is marked final and it appears as a base-type-specifier in | ||||||||||
2592 | // base-clause, the program is ill-formed. | ||||||||||
2593 | if (FinalAttr *FA = CXXBaseDecl->getAttr<FinalAttr>()) { | ||||||||||
2594 | Diag(BaseLoc, diag::err_class_marked_final_used_as_base) | ||||||||||
2595 | << CXXBaseDecl->getDeclName() | ||||||||||
2596 | << FA->isSpelledAsSealed(); | ||||||||||
2597 | Diag(CXXBaseDecl->getLocation(), diag::note_entity_declared_at) | ||||||||||
2598 | << CXXBaseDecl->getDeclName() << FA->getRange(); | ||||||||||
2599 | return nullptr; | ||||||||||
2600 | } | ||||||||||
2601 | |||||||||||
2602 | if (BaseDecl->isInvalidDecl()) | ||||||||||
2603 | Class->setInvalidDecl(); | ||||||||||
2604 | |||||||||||
2605 | // Create the base specifier. | ||||||||||
2606 | return new (Context) CXXBaseSpecifier(SpecifierRange, Virtual, | ||||||||||
2607 | Class->getTagKind() == TTK_Class, | ||||||||||
2608 | Access, TInfo, EllipsisLoc); | ||||||||||
2609 | } | ||||||||||
2610 | |||||||||||
2611 | /// ActOnBaseSpecifier - Parsed a base specifier. A base specifier is | ||||||||||
2612 | /// one entry in the base class list of a class specifier, for | ||||||||||
2613 | /// example: | ||||||||||
2614 | /// class foo : public bar, virtual private baz { | ||||||||||
2615 | /// 'public bar' and 'virtual private baz' are each base-specifiers. | ||||||||||
2616 | BaseResult | ||||||||||
2617 | Sema::ActOnBaseSpecifier(Decl *classdecl, SourceRange SpecifierRange, | ||||||||||
2618 | ParsedAttributes &Attributes, | ||||||||||
2619 | bool Virtual, AccessSpecifier Access, | ||||||||||
2620 | ParsedType basetype, SourceLocation BaseLoc, | ||||||||||
2621 | SourceLocation EllipsisLoc) { | ||||||||||
2622 | if (!classdecl) | ||||||||||
2623 | return true; | ||||||||||
2624 | |||||||||||
2625 | AdjustDeclIfTemplate(classdecl); | ||||||||||
2626 | CXXRecordDecl *Class = dyn_cast<CXXRecordDecl>(classdecl); | ||||||||||
2627 | if (!Class) | ||||||||||
2628 | return true; | ||||||||||
2629 | |||||||||||
2630 | // We haven't yet attached the base specifiers. | ||||||||||
2631 | Class->setIsParsingBaseSpecifiers(); | ||||||||||
2632 | |||||||||||
2633 | // We do not support any C++11 attributes on base-specifiers yet. | ||||||||||
2634 | // Diagnose any attributes we see. | ||||||||||
2635 | for (const ParsedAttr &AL : Attributes) { | ||||||||||
2636 | if (AL.isInvalid() || AL.getKind() == ParsedAttr::IgnoredAttribute) | ||||||||||
2637 | continue; | ||||||||||
2638 | Diag(AL.getLoc(), AL.getKind() == ParsedAttr::UnknownAttribute | ||||||||||
2639 | ? (unsigned)diag::warn_unknown_attribute_ignored | ||||||||||
2640 | : (unsigned)diag::err_base_specifier_attribute) | ||||||||||
2641 | << AL << AL.getRange(); | ||||||||||
2642 | } | ||||||||||
2643 | |||||||||||
2644 | TypeSourceInfo *TInfo = nullptr; | ||||||||||
2645 | GetTypeFromParser(basetype, &TInfo); | ||||||||||
2646 | |||||||||||
2647 | if (EllipsisLoc.isInvalid() && | ||||||||||
2648 | DiagnoseUnexpandedParameterPack(SpecifierRange.getBegin(), TInfo, | ||||||||||
2649 | UPPC_BaseType)) | ||||||||||
2650 | return true; | ||||||||||
2651 | |||||||||||
2652 | if (CXXBaseSpecifier *BaseSpec = CheckBaseSpecifier(Class, SpecifierRange, | ||||||||||
2653 | Virtual, Access, TInfo, | ||||||||||
2654 | EllipsisLoc)) | ||||||||||
2655 | return BaseSpec; | ||||||||||
2656 | else | ||||||||||
2657 | Class->setInvalidDecl(); | ||||||||||
2658 | |||||||||||
2659 | return true; | ||||||||||
2660 | } | ||||||||||
2661 | |||||||||||
2662 | /// Use small set to collect indirect bases. As this is only used | ||||||||||
2663 | /// locally, there's no need to abstract the small size parameter. | ||||||||||
2664 | typedef llvm::SmallPtrSet<QualType, 4> IndirectBaseSet; | ||||||||||
2665 | |||||||||||
2666 | /// Recursively add the bases of Type. Don't add Type itself. | ||||||||||
2667 | static void | ||||||||||
2668 | NoteIndirectBases(ASTContext &Context, IndirectBaseSet &Set, | ||||||||||
2669 | const QualType &Type) | ||||||||||
2670 | { | ||||||||||
2671 | // Even though the incoming type is a base, it might not be | ||||||||||
2672 | // a class -- it could be a template parm, for instance. | ||||||||||
2673 | if (auto Rec = Type->getAs<RecordType>()) { | ||||||||||
2674 | auto Decl = Rec->getAsCXXRecordDecl(); | ||||||||||
2675 | |||||||||||
2676 | // Iterate over its bases. | ||||||||||
2677 | for (const auto &BaseSpec : Decl->bases()) { | ||||||||||
2678 | QualType Base = Context.getCanonicalType(BaseSpec.getType()) | ||||||||||
2679 | .getUnqualifiedType(); | ||||||||||
2680 | if (Set.insert(Base).second) | ||||||||||
2681 | // If we've not already seen it, recurse. | ||||||||||
2682 | NoteIndirectBases(Context, Set, Base); | ||||||||||
2683 | } | ||||||||||
2684 | } | ||||||||||
2685 | } | ||||||||||
2686 | |||||||||||
2687 | /// Performs the actual work of attaching the given base class | ||||||||||
2688 | /// specifiers to a C++ class. | ||||||||||
2689 | bool Sema::AttachBaseSpecifiers(CXXRecordDecl *Class, | ||||||||||
2690 | MutableArrayRef<CXXBaseSpecifier *> Bases) { | ||||||||||
2691 | if (Bases.empty()) | ||||||||||
2692 | return false; | ||||||||||
2693 | |||||||||||
2694 | // Used to keep track of which base types we have already seen, so | ||||||||||
2695 | // that we can properly diagnose redundant direct base types. Note | ||||||||||
2696 | // that the key is always the unqualified canonical type of the base | ||||||||||
2697 | // class. | ||||||||||
2698 | std::map<QualType, CXXBaseSpecifier*, QualTypeOrdering> KnownBaseTypes; | ||||||||||
2699 | |||||||||||
2700 | // Used to track indirect bases so we can see if a direct base is | ||||||||||
2701 | // ambiguous. | ||||||||||
2702 | IndirectBaseSet IndirectBaseTypes; | ||||||||||
2703 | |||||||||||
2704 | // Copy non-redundant base specifiers into permanent storage. | ||||||||||
2705 | unsigned NumGoodBases = 0; | ||||||||||
2706 | bool Invalid = false; | ||||||||||
2707 | for (unsigned idx = 0; idx < Bases.size(); ++idx) { | ||||||||||
2708 | QualType NewBaseType | ||||||||||
2709 | = Context.getCanonicalType(Bases[idx]->getType()); | ||||||||||
2710 | NewBaseType = NewBaseType.getLocalUnqualifiedType(); | ||||||||||
2711 | |||||||||||
2712 | CXXBaseSpecifier *&KnownBase = KnownBaseTypes[NewBaseType]; | ||||||||||
2713 | if (KnownBase) { | ||||||||||
2714 | // C++ [class.mi]p3: | ||||||||||
2715 | // A class shall not be specified as a direct base class of a | ||||||||||
2716 | // derived class more than once. | ||||||||||
2717 | Diag(Bases[idx]->getBeginLoc(), diag::err_duplicate_base_class) | ||||||||||
2718 | << KnownBase->getType() << Bases[idx]->getSourceRange(); | ||||||||||
2719 | |||||||||||
2720 | // Delete the duplicate base class specifier; we're going to | ||||||||||
2721 | // overwrite its pointer later. | ||||||||||
2722 | Context.Deallocate(Bases[idx]); | ||||||||||
2723 | |||||||||||
2724 | Invalid = true; | ||||||||||
2725 | } else { | ||||||||||
2726 | // Okay, add this new base class. | ||||||||||
2727 | KnownBase = Bases[idx]; | ||||||||||
2728 | Bases[NumGoodBases++] = Bases[idx]; | ||||||||||
2729 | |||||||||||
2730 | // Note this base's direct & indirect bases, if there could be ambiguity. | ||||||||||
2731 | if (Bases.size() > 1) | ||||||||||
2732 | NoteIndirectBases(Context, IndirectBaseTypes, NewBaseType); | ||||||||||
2733 | |||||||||||
2734 | if (const RecordType *Record = NewBaseType->getAs<RecordType>()) { | ||||||||||
2735 | const CXXRecordDecl *RD = cast<CXXRecordDecl>(Record->getDecl()); | ||||||||||
2736 | if (Class->isInterface() && | ||||||||||
2737 | (!RD->isInterfaceLike() || | ||||||||||
2738 | KnownBase->getAccessSpecifier() != AS_public)) { | ||||||||||
2739 | // The Microsoft extension __interface does not permit bases that | ||||||||||
2740 | // are not themselves public interfaces. | ||||||||||
2741 | Diag(KnownBase->getBeginLoc(), diag::err_invalid_base_in_interface) | ||||||||||
2742 | << getRecordDiagFromTagKind(RD->getTagKind()) << RD | ||||||||||
2743 | << RD->getSourceRange(); | ||||||||||
2744 | Invalid = true; | ||||||||||
2745 | } | ||||||||||
2746 | if (RD->hasAttr<WeakAttr>()) | ||||||||||
2747 | Class->addAttr(WeakAttr::CreateImplicit(Context)); | ||||||||||
2748 | } | ||||||||||
2749 | } | ||||||||||
2750 | } | ||||||||||
2751 | |||||||||||
2752 | // Attach the remaining base class specifiers to the derived class. | ||||||||||
2753 | Class->setBases(Bases.data(), NumGoodBases); | ||||||||||
2754 | |||||||||||
2755 | // Check that the only base classes that are duplicate are virtual. | ||||||||||
2756 | for (unsigned idx = 0; idx < NumGoodBases; ++idx) { | ||||||||||
2757 | // Check whether this direct base is inaccessible due to ambiguity. | ||||||||||
2758 | QualType BaseType = Bases[idx]->getType(); | ||||||||||
2759 | |||||||||||
2760 | // Skip all dependent types in templates being used as base specifiers. | ||||||||||
2761 | // Checks below assume that the base specifier is a CXXRecord. | ||||||||||
2762 | if (BaseType->isDependentType()) | ||||||||||
2763 | continue; | ||||||||||
2764 | |||||||||||
2765 | CanQualType CanonicalBase = Context.getCanonicalType(BaseType) | ||||||||||
2766 | .getUnqualifiedType(); | ||||||||||
2767 | |||||||||||
2768 | if (IndirectBaseTypes.count(CanonicalBase)) { | ||||||||||
2769 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||||||
2770 | /*DetectVirtual=*/true); | ||||||||||
2771 | bool found | ||||||||||
2772 | = Class->isDerivedFrom(CanonicalBase->getAsCXXRecordDecl(), Paths); | ||||||||||
2773 | assert(found)(static_cast <bool> (found) ? void (0) : __assert_fail ( "found", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2773, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2774 | (void)found; | ||||||||||
2775 | |||||||||||
2776 | if (Paths.isAmbiguous(CanonicalBase)) | ||||||||||
2777 | Diag(Bases[idx]->getBeginLoc(), diag::warn_inaccessible_base_class) | ||||||||||
2778 | << BaseType << getAmbiguousPathsDisplayString(Paths) | ||||||||||
2779 | << Bases[idx]->getSourceRange(); | ||||||||||
2780 | else | ||||||||||
2781 | assert(Bases[idx]->isVirtual())(static_cast <bool> (Bases[idx]->isVirtual()) ? void (0) : __assert_fail ("Bases[idx]->isVirtual()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2781, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2782 | } | ||||||||||
2783 | |||||||||||
2784 | // Delete the base class specifier, since its data has been copied | ||||||||||
2785 | // into the CXXRecordDecl. | ||||||||||
2786 | Context.Deallocate(Bases[idx]); | ||||||||||
2787 | } | ||||||||||
2788 | |||||||||||
2789 | return Invalid; | ||||||||||
2790 | } | ||||||||||
2791 | |||||||||||
2792 | /// ActOnBaseSpecifiers - Attach the given base specifiers to the | ||||||||||
2793 | /// class, after checking whether there are any duplicate base | ||||||||||
2794 | /// classes. | ||||||||||
2795 | void Sema::ActOnBaseSpecifiers(Decl *ClassDecl, | ||||||||||
2796 | MutableArrayRef<CXXBaseSpecifier *> Bases) { | ||||||||||
2797 | if (!ClassDecl || Bases.empty()) | ||||||||||
2798 | return; | ||||||||||
2799 | |||||||||||
2800 | AdjustDeclIfTemplate(ClassDecl); | ||||||||||
2801 | AttachBaseSpecifiers(cast<CXXRecordDecl>(ClassDecl), Bases); | ||||||||||
2802 | } | ||||||||||
2803 | |||||||||||
2804 | /// Determine whether the type \p Derived is a C++ class that is | ||||||||||
2805 | /// derived from the type \p Base. | ||||||||||
2806 | bool Sema::IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base) { | ||||||||||
2807 | if (!getLangOpts().CPlusPlus) | ||||||||||
2808 | return false; | ||||||||||
2809 | |||||||||||
2810 | CXXRecordDecl *DerivedRD = Derived->getAsCXXRecordDecl(); | ||||||||||
2811 | if (!DerivedRD) | ||||||||||
2812 | return false; | ||||||||||
2813 | |||||||||||
2814 | CXXRecordDecl *BaseRD = Base->getAsCXXRecordDecl(); | ||||||||||
2815 | if (!BaseRD) | ||||||||||
2816 | return false; | ||||||||||
2817 | |||||||||||
2818 | // If either the base or the derived type is invalid, don't try to | ||||||||||
2819 | // check whether one is derived from the other. | ||||||||||
2820 | if (BaseRD->isInvalidDecl() || DerivedRD->isInvalidDecl()) | ||||||||||
2821 | return false; | ||||||||||
2822 | |||||||||||
2823 | // FIXME: In a modules build, do we need the entire path to be visible for us | ||||||||||
2824 | // to be able to use the inheritance relationship? | ||||||||||
2825 | if (!isCompleteType(Loc, Derived) && !DerivedRD->isBeingDefined()) | ||||||||||
2826 | return false; | ||||||||||
2827 | |||||||||||
2828 | return DerivedRD->isDerivedFrom(BaseRD); | ||||||||||
2829 | } | ||||||||||
2830 | |||||||||||
2831 | /// Determine whether the type \p Derived is a C++ class that is | ||||||||||
2832 | /// derived from the type \p Base. | ||||||||||
2833 | bool Sema::IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base, | ||||||||||
2834 | CXXBasePaths &Paths) { | ||||||||||
2835 | if (!getLangOpts().CPlusPlus) | ||||||||||
2836 | return false; | ||||||||||
2837 | |||||||||||
2838 | CXXRecordDecl *DerivedRD = Derived->getAsCXXRecordDecl(); | ||||||||||
2839 | if (!DerivedRD) | ||||||||||
2840 | return false; | ||||||||||
2841 | |||||||||||
2842 | CXXRecordDecl *BaseRD = Base->getAsCXXRecordDecl(); | ||||||||||
2843 | if (!BaseRD) | ||||||||||
2844 | return false; | ||||||||||
2845 | |||||||||||
2846 | if (!isCompleteType(Loc, Derived) && !DerivedRD->isBeingDefined()) | ||||||||||
2847 | return false; | ||||||||||
2848 | |||||||||||
2849 | return DerivedRD->isDerivedFrom(BaseRD, Paths); | ||||||||||
2850 | } | ||||||||||
2851 | |||||||||||
2852 | static void BuildBasePathArray(const CXXBasePath &Path, | ||||||||||
2853 | CXXCastPath &BasePathArray) { | ||||||||||
2854 | // We first go backward and check if we have a virtual base. | ||||||||||
2855 | // FIXME: It would be better if CXXBasePath had the base specifier for | ||||||||||
2856 | // the nearest virtual base. | ||||||||||
2857 | unsigned Start = 0; | ||||||||||
2858 | for (unsigned I = Path.size(); I != 0; --I) { | ||||||||||
2859 | if (Path[I - 1].Base->isVirtual()) { | ||||||||||
2860 | Start = I - 1; | ||||||||||
2861 | break; | ||||||||||
2862 | } | ||||||||||
2863 | } | ||||||||||
2864 | |||||||||||
2865 | // Now add all bases. | ||||||||||
2866 | for (unsigned I = Start, E = Path.size(); I != E; ++I) | ||||||||||
2867 | BasePathArray.push_back(const_cast<CXXBaseSpecifier*>(Path[I].Base)); | ||||||||||
2868 | } | ||||||||||
2869 | |||||||||||
2870 | |||||||||||
2871 | void Sema::BuildBasePathArray(const CXXBasePaths &Paths, | ||||||||||
2872 | CXXCastPath &BasePathArray) { | ||||||||||
2873 | assert(BasePathArray.empty() && "Base path array must be empty!")(static_cast <bool> (BasePathArray.empty() && "Base path array must be empty!" ) ? void (0) : __assert_fail ("BasePathArray.empty() && \"Base path array must be empty!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2873, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2874 | assert(Paths.isRecordingPaths() && "Must record paths!")(static_cast <bool> (Paths.isRecordingPaths() && "Must record paths!") ? void (0) : __assert_fail ("Paths.isRecordingPaths() && \"Must record paths!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2874, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2875 | return ::BuildBasePathArray(Paths.front(), BasePathArray); | ||||||||||
2876 | } | ||||||||||
2877 | /// CheckDerivedToBaseConversion - Check whether the Derived-to-Base | ||||||||||
2878 | /// conversion (where Derived and Base are class types) is | ||||||||||
2879 | /// well-formed, meaning that the conversion is unambiguous (and | ||||||||||
2880 | /// that all of the base classes are accessible). Returns true | ||||||||||
2881 | /// and emits a diagnostic if the code is ill-formed, returns false | ||||||||||
2882 | /// otherwise. Loc is the location where this routine should point to | ||||||||||
2883 | /// if there is an error, and Range is the source range to highlight | ||||||||||
2884 | /// if there is an error. | ||||||||||
2885 | /// | ||||||||||
2886 | /// If either InaccessibleBaseID or AmbiguousBaseConvID are 0, then the | ||||||||||
2887 | /// diagnostic for the respective type of error will be suppressed, but the | ||||||||||
2888 | /// check for ill-formed code will still be performed. | ||||||||||
2889 | bool | ||||||||||
2890 | Sema::CheckDerivedToBaseConversion(QualType Derived, QualType Base, | ||||||||||
2891 | unsigned InaccessibleBaseID, | ||||||||||
2892 | unsigned AmbiguousBaseConvID, | ||||||||||
2893 | SourceLocation Loc, SourceRange Range, | ||||||||||
2894 | DeclarationName Name, | ||||||||||
2895 | CXXCastPath *BasePath, | ||||||||||
2896 | bool IgnoreAccess) { | ||||||||||
2897 | // First, determine whether the path from Derived to Base is | ||||||||||
2898 | // ambiguous. This is slightly more expensive than checking whether | ||||||||||
2899 | // the Derived to Base conversion exists, because here we need to | ||||||||||
2900 | // explore multiple paths to determine if there is an ambiguity. | ||||||||||
2901 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||||||
2902 | /*DetectVirtual=*/false); | ||||||||||
2903 | bool DerivationOkay = IsDerivedFrom(Loc, Derived, Base, Paths); | ||||||||||
2904 | if (!DerivationOkay) | ||||||||||
2905 | return true; | ||||||||||
2906 | |||||||||||
2907 | const CXXBasePath *Path = nullptr; | ||||||||||
2908 | if (!Paths.isAmbiguous(Context.getCanonicalType(Base).getUnqualifiedType())) | ||||||||||
2909 | Path = &Paths.front(); | ||||||||||
2910 | |||||||||||
2911 | // For MSVC compatibility, check if Derived directly inherits from Base. Clang | ||||||||||
2912 | // warns about this hierarchy under -Winaccessible-base, but MSVC allows the | ||||||||||
2913 | // user to access such bases. | ||||||||||
2914 | if (!Path && getLangOpts().MSVCCompat) { | ||||||||||
2915 | for (const CXXBasePath &PossiblePath : Paths) { | ||||||||||
2916 | if (PossiblePath.size() == 1) { | ||||||||||
2917 | Path = &PossiblePath; | ||||||||||
2918 | if (AmbiguousBaseConvID) | ||||||||||
2919 | Diag(Loc, diag::ext_ms_ambiguous_direct_base) | ||||||||||
2920 | << Base << Derived << Range; | ||||||||||
2921 | break; | ||||||||||
2922 | } | ||||||||||
2923 | } | ||||||||||
2924 | } | ||||||||||
2925 | |||||||||||
2926 | if (Path) { | ||||||||||
2927 | if (!IgnoreAccess) { | ||||||||||
2928 | // Check that the base class can be accessed. | ||||||||||
2929 | switch ( | ||||||||||
2930 | CheckBaseClassAccess(Loc, Base, Derived, *Path, InaccessibleBaseID)) { | ||||||||||
2931 | case AR_inaccessible: | ||||||||||
2932 | return true; | ||||||||||
2933 | case AR_accessible: | ||||||||||
2934 | case AR_dependent: | ||||||||||
2935 | case AR_delayed: | ||||||||||
2936 | break; | ||||||||||
2937 | } | ||||||||||
2938 | } | ||||||||||
2939 | |||||||||||
2940 | // Build a base path if necessary. | ||||||||||
2941 | if (BasePath) | ||||||||||
2942 | ::BuildBasePathArray(*Path, *BasePath); | ||||||||||
2943 | return false; | ||||||||||
2944 | } | ||||||||||
2945 | |||||||||||
2946 | if (AmbiguousBaseConvID) { | ||||||||||
2947 | // We know that the derived-to-base conversion is ambiguous, and | ||||||||||
2948 | // we're going to produce a diagnostic. Perform the derived-to-base | ||||||||||
2949 | // search just one more time to compute all of the possible paths so | ||||||||||
2950 | // that we can print them out. This is more expensive than any of | ||||||||||
2951 | // the previous derived-to-base checks we've done, but at this point | ||||||||||
2952 | // performance isn't as much of an issue. | ||||||||||
2953 | Paths.clear(); | ||||||||||
2954 | Paths.setRecordingPaths(true); | ||||||||||
2955 | bool StillOkay = IsDerivedFrom(Loc, Derived, Base, Paths); | ||||||||||
2956 | assert(StillOkay && "Can only be used with a derived-to-base conversion")(static_cast <bool> (StillOkay && "Can only be used with a derived-to-base conversion" ) ? void (0) : __assert_fail ("StillOkay && \"Can only be used with a derived-to-base conversion\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 2956, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
2957 | (void)StillOkay; | ||||||||||
2958 | |||||||||||
2959 | // Build up a textual representation of the ambiguous paths, e.g., | ||||||||||
2960 | // D -> B -> A, that will be used to illustrate the ambiguous | ||||||||||
2961 | // conversions in the diagnostic. We only print one of the paths | ||||||||||
2962 | // to each base class subobject. | ||||||||||
2963 | std::string PathDisplayStr = getAmbiguousPathsDisplayString(Paths); | ||||||||||
2964 | |||||||||||
2965 | Diag(Loc, AmbiguousBaseConvID) | ||||||||||
2966 | << Derived << Base << PathDisplayStr << Range << Name; | ||||||||||
2967 | } | ||||||||||
2968 | return true; | ||||||||||
2969 | } | ||||||||||
2970 | |||||||||||
2971 | bool | ||||||||||
2972 | Sema::CheckDerivedToBaseConversion(QualType Derived, QualType Base, | ||||||||||
2973 | SourceLocation Loc, SourceRange Range, | ||||||||||
2974 | CXXCastPath *BasePath, | ||||||||||
2975 | bool IgnoreAccess) { | ||||||||||
2976 | return CheckDerivedToBaseConversion( | ||||||||||
2977 | Derived, Base, diag::err_upcast_to_inaccessible_base, | ||||||||||
2978 | diag::err_ambiguous_derived_to_base_conv, Loc, Range, DeclarationName(), | ||||||||||
2979 | BasePath, IgnoreAccess); | ||||||||||
2980 | } | ||||||||||
2981 | |||||||||||
2982 | |||||||||||
2983 | /// Builds a string representing ambiguous paths from a | ||||||||||
2984 | /// specific derived class to different subobjects of the same base | ||||||||||
2985 | /// class. | ||||||||||
2986 | /// | ||||||||||
2987 | /// This function builds a string that can be used in error messages | ||||||||||
2988 | /// to show the different paths that one can take through the | ||||||||||
2989 | /// inheritance hierarchy to go from the derived class to different | ||||||||||
2990 | /// subobjects of a base class. The result looks something like this: | ||||||||||
2991 | /// @code | ||||||||||
2992 | /// struct D -> struct B -> struct A | ||||||||||
2993 | /// struct D -> struct C -> struct A | ||||||||||
2994 | /// @endcode | ||||||||||
2995 | std::string Sema::getAmbiguousPathsDisplayString(CXXBasePaths &Paths) { | ||||||||||
2996 | std::string PathDisplayStr; | ||||||||||
2997 | std::set<unsigned> DisplayedPaths; | ||||||||||
2998 | for (CXXBasePaths::paths_iterator Path = Paths.begin(); | ||||||||||
2999 | Path != Paths.end(); ++Path) { | ||||||||||
3000 | if (DisplayedPaths.insert(Path->back().SubobjectNumber).second) { | ||||||||||
3001 | // We haven't displayed a path to this particular base | ||||||||||
3002 | // class subobject yet. | ||||||||||
3003 | PathDisplayStr += "\n "; | ||||||||||
3004 | PathDisplayStr += Context.getTypeDeclType(Paths.getOrigin()).getAsString(); | ||||||||||
3005 | for (CXXBasePath::const_iterator Element = Path->begin(); | ||||||||||
3006 | Element != Path->end(); ++Element) | ||||||||||
3007 | PathDisplayStr += " -> " + Element->Base->getType().getAsString(); | ||||||||||
3008 | } | ||||||||||
3009 | } | ||||||||||
3010 | |||||||||||
3011 | return PathDisplayStr; | ||||||||||
3012 | } | ||||||||||
3013 | |||||||||||
3014 | //===----------------------------------------------------------------------===// | ||||||||||
3015 | // C++ class member Handling | ||||||||||
3016 | //===----------------------------------------------------------------------===// | ||||||||||
3017 | |||||||||||
3018 | /// ActOnAccessSpecifier - Parsed an access specifier followed by a colon. | ||||||||||
3019 | bool Sema::ActOnAccessSpecifier(AccessSpecifier Access, SourceLocation ASLoc, | ||||||||||
3020 | SourceLocation ColonLoc, | ||||||||||
3021 | const ParsedAttributesView &Attrs) { | ||||||||||
3022 | assert(Access != AS_none && "Invalid kind for syntactic access specifier!")(static_cast <bool> (Access != AS_none && "Invalid kind for syntactic access specifier!" ) ? void (0) : __assert_fail ("Access != AS_none && \"Invalid kind for syntactic access specifier!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3022, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3023 | AccessSpecDecl *ASDecl = AccessSpecDecl::Create(Context, Access, CurContext, | ||||||||||
3024 | ASLoc, ColonLoc); | ||||||||||
3025 | CurContext->addHiddenDecl(ASDecl); | ||||||||||
3026 | return ProcessAccessDeclAttributeList(ASDecl, Attrs); | ||||||||||
3027 | } | ||||||||||
3028 | |||||||||||
3029 | /// CheckOverrideControl - Check C++11 override control semantics. | ||||||||||
3030 | void Sema::CheckOverrideControl(NamedDecl *D) { | ||||||||||
3031 | if (D->isInvalidDecl()) | ||||||||||
3032 | return; | ||||||||||
3033 | |||||||||||
3034 | // We only care about "override" and "final" declarations. | ||||||||||
3035 | if (!D->hasAttr<OverrideAttr>() && !D->hasAttr<FinalAttr>()) | ||||||||||
3036 | return; | ||||||||||
3037 | |||||||||||
3038 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D); | ||||||||||
3039 | |||||||||||
3040 | // We can't check dependent instance methods. | ||||||||||
3041 | if (MD && MD->isInstance() && | ||||||||||
3042 | (MD->getParent()->hasAnyDependentBases() || | ||||||||||
3043 | MD->getType()->isDependentType())) | ||||||||||
3044 | return; | ||||||||||
3045 | |||||||||||
3046 | if (MD && !MD->isVirtual()) { | ||||||||||
3047 | // If we have a non-virtual method, check if if hides a virtual method. | ||||||||||
3048 | // (In that case, it's most likely the method has the wrong type.) | ||||||||||
3049 | SmallVector<CXXMethodDecl *, 8> OverloadedMethods; | ||||||||||
3050 | FindHiddenVirtualMethods(MD, OverloadedMethods); | ||||||||||
3051 | |||||||||||
3052 | if (!OverloadedMethods.empty()) { | ||||||||||
3053 | if (OverrideAttr *OA = D->getAttr<OverrideAttr>()) { | ||||||||||
3054 | Diag(OA->getLocation(), | ||||||||||
3055 | diag::override_keyword_hides_virtual_member_function) | ||||||||||
3056 | << "override" << (OverloadedMethods.size() > 1); | ||||||||||
3057 | } else if (FinalAttr *FA = D->getAttr<FinalAttr>()) { | ||||||||||
3058 | Diag(FA->getLocation(), | ||||||||||
3059 | diag::override_keyword_hides_virtual_member_function) | ||||||||||
3060 | << (FA->isSpelledAsSealed() ? "sealed" : "final") | ||||||||||
3061 | << (OverloadedMethods.size() > 1); | ||||||||||
3062 | } | ||||||||||
3063 | NoteHiddenVirtualMethods(MD, OverloadedMethods); | ||||||||||
3064 | MD->setInvalidDecl(); | ||||||||||
3065 | return; | ||||||||||
3066 | } | ||||||||||
3067 | // Fall through into the general case diagnostic. | ||||||||||
3068 | // FIXME: We might want to attempt typo correction here. | ||||||||||
3069 | } | ||||||||||
3070 | |||||||||||
3071 | if (!MD || !MD->isVirtual()) { | ||||||||||
3072 | if (OverrideAttr *OA = D->getAttr<OverrideAttr>()) { | ||||||||||
3073 | Diag(OA->getLocation(), | ||||||||||
3074 | diag::override_keyword_only_allowed_on_virtual_member_functions) | ||||||||||
3075 | << "override" << FixItHint::CreateRemoval(OA->getLocation()); | ||||||||||
3076 | D->dropAttr<OverrideAttr>(); | ||||||||||
3077 | } | ||||||||||
3078 | if (FinalAttr *FA = D->getAttr<FinalAttr>()) { | ||||||||||
3079 | Diag(FA->getLocation(), | ||||||||||
3080 | diag::override_keyword_only_allowed_on_virtual_member_functions) | ||||||||||
3081 | << (FA->isSpelledAsSealed() ? "sealed" : "final") | ||||||||||
3082 | << FixItHint::CreateRemoval(FA->getLocation()); | ||||||||||
3083 | D->dropAttr<FinalAttr>(); | ||||||||||
3084 | } | ||||||||||
3085 | return; | ||||||||||
3086 | } | ||||||||||
3087 | |||||||||||
3088 | // C++11 [class.virtual]p5: | ||||||||||
3089 | // If a function is marked with the virt-specifier override and | ||||||||||
3090 | // does not override a member function of a base class, the program is | ||||||||||
3091 | // ill-formed. | ||||||||||
3092 | bool HasOverriddenMethods = MD->size_overridden_methods() != 0; | ||||||||||
3093 | if (MD->hasAttr<OverrideAttr>() && !HasOverriddenMethods) | ||||||||||
3094 | Diag(MD->getLocation(), diag::err_function_marked_override_not_overriding) | ||||||||||
3095 | << MD->getDeclName(); | ||||||||||
3096 | } | ||||||||||
3097 | |||||||||||
3098 | void Sema::DiagnoseAbsenceOfOverrideControl(NamedDecl *D, bool Inconsistent) { | ||||||||||
3099 | if (D->isInvalidDecl() || D->hasAttr<OverrideAttr>()) | ||||||||||
3100 | return; | ||||||||||
3101 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D); | ||||||||||
3102 | if (!MD || MD->isImplicit() || MD->hasAttr<FinalAttr>()) | ||||||||||
3103 | return; | ||||||||||
3104 | |||||||||||
3105 | SourceLocation Loc = MD->getLocation(); | ||||||||||
3106 | SourceLocation SpellingLoc = Loc; | ||||||||||
3107 | if (getSourceManager().isMacroArgExpansion(Loc)) | ||||||||||
3108 | SpellingLoc = getSourceManager().getImmediateExpansionRange(Loc).getBegin(); | ||||||||||
3109 | SpellingLoc = getSourceManager().getSpellingLoc(SpellingLoc); | ||||||||||
3110 | if (SpellingLoc.isValid() && getSourceManager().isInSystemHeader(SpellingLoc)) | ||||||||||
3111 | return; | ||||||||||
3112 | |||||||||||
3113 | if (MD->size_overridden_methods() > 0) { | ||||||||||
3114 | auto EmitDiag = [&](unsigned DiagInconsistent, unsigned DiagSuggest) { | ||||||||||
3115 | unsigned DiagID = | ||||||||||
3116 | Inconsistent && !Diags.isIgnored(DiagInconsistent, MD->getLocation()) | ||||||||||
3117 | ? DiagInconsistent | ||||||||||
3118 | : DiagSuggest; | ||||||||||
3119 | Diag(MD->getLocation(), DiagID) << MD->getDeclName(); | ||||||||||
3120 | const CXXMethodDecl *OMD = *MD->begin_overridden_methods(); | ||||||||||
3121 | Diag(OMD->getLocation(), diag::note_overridden_virtual_function); | ||||||||||
3122 | }; | ||||||||||
3123 | if (isa<CXXDestructorDecl>(MD)) | ||||||||||
3124 | EmitDiag( | ||||||||||
3125 | diag::warn_inconsistent_destructor_marked_not_override_overriding, | ||||||||||
3126 | diag::warn_suggest_destructor_marked_not_override_overriding); | ||||||||||
3127 | else | ||||||||||
3128 | EmitDiag(diag::warn_inconsistent_function_marked_not_override_overriding, | ||||||||||
3129 | diag::warn_suggest_function_marked_not_override_overriding); | ||||||||||
3130 | } | ||||||||||
3131 | } | ||||||||||
3132 | |||||||||||
3133 | /// CheckIfOverriddenFunctionIsMarkedFinal - Checks whether a virtual member | ||||||||||
3134 | /// function overrides a virtual member function marked 'final', according to | ||||||||||
3135 | /// C++11 [class.virtual]p4. | ||||||||||
3136 | bool Sema::CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, | ||||||||||
3137 | const CXXMethodDecl *Old) { | ||||||||||
3138 | FinalAttr *FA = Old->getAttr<FinalAttr>(); | ||||||||||
3139 | if (!FA) | ||||||||||
3140 | return false; | ||||||||||
3141 | |||||||||||
3142 | Diag(New->getLocation(), diag::err_final_function_overridden) | ||||||||||
3143 | << New->getDeclName() | ||||||||||
3144 | << FA->isSpelledAsSealed(); | ||||||||||
3145 | Diag(Old->getLocation(), diag::note_overridden_virtual_function); | ||||||||||
3146 | return true; | ||||||||||
3147 | } | ||||||||||
3148 | |||||||||||
3149 | static bool InitializationHasSideEffects(const FieldDecl &FD) { | ||||||||||
3150 | const Type *T = FD.getType()->getBaseElementTypeUnsafe(); | ||||||||||
3151 | // FIXME: Destruction of ObjC lifetime types has side-effects. | ||||||||||
3152 | if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl()) | ||||||||||
3153 | return !RD->isCompleteDefinition() || | ||||||||||
3154 | !RD->hasTrivialDefaultConstructor() || | ||||||||||
3155 | !RD->hasTrivialDestructor(); | ||||||||||
3156 | return false; | ||||||||||
3157 | } | ||||||||||
3158 | |||||||||||
3159 | static const ParsedAttr *getMSPropertyAttr(const ParsedAttributesView &list) { | ||||||||||
3160 | ParsedAttributesView::const_iterator Itr = | ||||||||||
3161 | llvm::find_if(list, [](const ParsedAttr &AL) { | ||||||||||
3162 | return AL.isDeclspecPropertyAttribute(); | ||||||||||
3163 | }); | ||||||||||
3164 | if (Itr != list.end()) | ||||||||||
3165 | return &*Itr; | ||||||||||
3166 | return nullptr; | ||||||||||
3167 | } | ||||||||||
3168 | |||||||||||
3169 | // Check if there is a field shadowing. | ||||||||||
3170 | void Sema::CheckShadowInheritedFields(const SourceLocation &Loc, | ||||||||||
3171 | DeclarationName FieldName, | ||||||||||
3172 | const CXXRecordDecl *RD, | ||||||||||
3173 | bool DeclIsField) { | ||||||||||
3174 | if (Diags.isIgnored(diag::warn_shadow_field, Loc)) | ||||||||||
3175 | return; | ||||||||||
3176 | |||||||||||
3177 | // To record a shadowed field in a base | ||||||||||
3178 | std::map<CXXRecordDecl*, NamedDecl*> Bases; | ||||||||||
3179 | auto FieldShadowed = [&](const CXXBaseSpecifier *Specifier, | ||||||||||
3180 | CXXBasePath &Path) { | ||||||||||
3181 | const auto Base = Specifier->getType()->getAsCXXRecordDecl(); | ||||||||||
3182 | // Record an ambiguous path directly | ||||||||||
3183 | if (Bases.find(Base) != Bases.end()) | ||||||||||
3184 | return true; | ||||||||||
3185 | for (const auto Field : Base->lookup(FieldName)) { | ||||||||||
3186 | if ((isa<FieldDecl>(Field) || isa<IndirectFieldDecl>(Field)) && | ||||||||||
3187 | Field->getAccess() != AS_private) { | ||||||||||
3188 | assert(Field->getAccess() != AS_none)(static_cast <bool> (Field->getAccess() != AS_none) ? void (0) : __assert_fail ("Field->getAccess() != AS_none" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3188, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3189 | assert(Bases.find(Base) == Bases.end())(static_cast <bool> (Bases.find(Base) == Bases.end()) ? void (0) : __assert_fail ("Bases.find(Base) == Bases.end()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3189, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3190 | Bases[Base] = Field; | ||||||||||
3191 | return true; | ||||||||||
3192 | } | ||||||||||
3193 | } | ||||||||||
3194 | return false; | ||||||||||
3195 | }; | ||||||||||
3196 | |||||||||||
3197 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||||||
3198 | /*DetectVirtual=*/true); | ||||||||||
3199 | if (!RD->lookupInBases(FieldShadowed, Paths)) | ||||||||||
3200 | return; | ||||||||||
3201 | |||||||||||
3202 | for (const auto &P : Paths) { | ||||||||||
3203 | auto Base = P.back().Base->getType()->getAsCXXRecordDecl(); | ||||||||||
3204 | auto It = Bases.find(Base); | ||||||||||
3205 | // Skip duplicated bases | ||||||||||
3206 | if (It == Bases.end()) | ||||||||||
3207 | continue; | ||||||||||
3208 | auto BaseField = It->second; | ||||||||||
3209 | assert(BaseField->getAccess() != AS_private)(static_cast <bool> (BaseField->getAccess() != AS_private ) ? void (0) : __assert_fail ("BaseField->getAccess() != AS_private" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3209, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3210 | if (AS_none != | ||||||||||
3211 | CXXRecordDecl::MergeAccess(P.Access, BaseField->getAccess())) { | ||||||||||
3212 | Diag(Loc, diag::warn_shadow_field) | ||||||||||
3213 | << FieldName << RD << Base << DeclIsField; | ||||||||||
3214 | Diag(BaseField->getLocation(), diag::note_shadow_field); | ||||||||||
3215 | Bases.erase(It); | ||||||||||
3216 | } | ||||||||||
3217 | } | ||||||||||
3218 | } | ||||||||||
3219 | |||||||||||
3220 | /// ActOnCXXMemberDeclarator - This is invoked when a C++ class member | ||||||||||
3221 | /// declarator is parsed. 'AS' is the access specifier, 'BW' specifies the | ||||||||||
3222 | /// bitfield width if there is one, 'InitExpr' specifies the initializer if | ||||||||||
3223 | /// one has been parsed, and 'InitStyle' is set if an in-class initializer is | ||||||||||
3224 | /// present (but parsing it has been deferred). | ||||||||||
3225 | NamedDecl * | ||||||||||
3226 | Sema::ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D, | ||||||||||
3227 | MultiTemplateParamsArg TemplateParameterLists, | ||||||||||
3228 | Expr *BW, const VirtSpecifiers &VS, | ||||||||||
3229 | InClassInitStyle InitStyle) { | ||||||||||
3230 | const DeclSpec &DS = D.getDeclSpec(); | ||||||||||
3231 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||||||
3232 | DeclarationName Name = NameInfo.getName(); | ||||||||||
3233 | SourceLocation Loc = NameInfo.getLoc(); | ||||||||||
3234 | |||||||||||
3235 | // For anonymous bitfields, the location should point to the type. | ||||||||||
3236 | if (Loc.isInvalid()) | ||||||||||
3237 | Loc = D.getBeginLoc(); | ||||||||||
3238 | |||||||||||
3239 | Expr *BitWidth = static_cast<Expr*>(BW); | ||||||||||
3240 | |||||||||||
3241 | assert(isa<CXXRecordDecl>(CurContext))(static_cast <bool> (isa<CXXRecordDecl>(CurContext )) ? void (0) : __assert_fail ("isa<CXXRecordDecl>(CurContext)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3241, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3242 | assert(!DS.isFriendSpecified())(static_cast <bool> (!DS.isFriendSpecified()) ? void (0 ) : __assert_fail ("!DS.isFriendSpecified()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3242, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3243 | |||||||||||
3244 | bool isFunc = D.isDeclarationOfFunction(); | ||||||||||
3245 | const ParsedAttr *MSPropertyAttr = | ||||||||||
3246 | getMSPropertyAttr(D.getDeclSpec().getAttributes()); | ||||||||||
3247 | |||||||||||
3248 | if (cast<CXXRecordDecl>(CurContext)->isInterface()) { | ||||||||||
3249 | // The Microsoft extension __interface only permits public member functions | ||||||||||
3250 | // and prohibits constructors, destructors, operators, non-public member | ||||||||||
3251 | // functions, static methods and data members. | ||||||||||
3252 | unsigned InvalidDecl; | ||||||||||
3253 | bool ShowDeclName = true; | ||||||||||
3254 | if (!isFunc && | ||||||||||
3255 | (DS.getStorageClassSpec() == DeclSpec::SCS_typedef || MSPropertyAttr)) | ||||||||||
3256 | InvalidDecl = 0; | ||||||||||
3257 | else if (!isFunc) | ||||||||||
3258 | InvalidDecl = 1; | ||||||||||
3259 | else if (AS != AS_public) | ||||||||||
3260 | InvalidDecl = 2; | ||||||||||
3261 | else if (DS.getStorageClassSpec() == DeclSpec::SCS_static) | ||||||||||
3262 | InvalidDecl = 3; | ||||||||||
3263 | else switch (Name.getNameKind()) { | ||||||||||
3264 | case DeclarationName::CXXConstructorName: | ||||||||||
3265 | InvalidDecl = 4; | ||||||||||
3266 | ShowDeclName = false; | ||||||||||
3267 | break; | ||||||||||
3268 | |||||||||||
3269 | case DeclarationName::CXXDestructorName: | ||||||||||
3270 | InvalidDecl = 5; | ||||||||||
3271 | ShowDeclName = false; | ||||||||||
3272 | break; | ||||||||||
3273 | |||||||||||
3274 | case DeclarationName::CXXOperatorName: | ||||||||||
3275 | case DeclarationName::CXXConversionFunctionName: | ||||||||||
3276 | InvalidDecl = 6; | ||||||||||
3277 | break; | ||||||||||
3278 | |||||||||||
3279 | default: | ||||||||||
3280 | InvalidDecl = 0; | ||||||||||
3281 | break; | ||||||||||
3282 | } | ||||||||||
3283 | |||||||||||
3284 | if (InvalidDecl) { | ||||||||||
3285 | if (ShowDeclName) | ||||||||||
3286 | Diag(Loc, diag::err_invalid_member_in_interface) | ||||||||||
3287 | << (InvalidDecl-1) << Name; | ||||||||||
3288 | else | ||||||||||
3289 | Diag(Loc, diag::err_invalid_member_in_interface) | ||||||||||
3290 | << (InvalidDecl-1) << ""; | ||||||||||
3291 | return nullptr; | ||||||||||
3292 | } | ||||||||||
3293 | } | ||||||||||
3294 | |||||||||||
3295 | // C++ 9.2p6: A member shall not be declared to have automatic storage | ||||||||||
3296 | // duration (auto, register) or with the extern storage-class-specifier. | ||||||||||
3297 | // C++ 7.1.1p8: The mutable specifier can be applied only to names of class | ||||||||||
3298 | // data members and cannot be applied to names declared const or static, | ||||||||||
3299 | // and cannot be applied to reference members. | ||||||||||
3300 | switch (DS.getStorageClassSpec()) { | ||||||||||
3301 | case DeclSpec::SCS_unspecified: | ||||||||||
3302 | case DeclSpec::SCS_typedef: | ||||||||||
3303 | case DeclSpec::SCS_static: | ||||||||||
3304 | break; | ||||||||||
3305 | case DeclSpec::SCS_mutable: | ||||||||||
3306 | if (isFunc) { | ||||||||||
3307 | Diag(DS.getStorageClassSpecLoc(), diag::err_mutable_function); | ||||||||||
3308 | |||||||||||
3309 | // FIXME: It would be nicer if the keyword was ignored only for this | ||||||||||
3310 | // declarator. Otherwise we could get follow-up errors. | ||||||||||
3311 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||||||
3312 | } | ||||||||||
3313 | break; | ||||||||||
3314 | default: | ||||||||||
3315 | Diag(DS.getStorageClassSpecLoc(), | ||||||||||
3316 | diag::err_storageclass_invalid_for_member); | ||||||||||
3317 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||||||
3318 | break; | ||||||||||
3319 | } | ||||||||||
3320 | |||||||||||
3321 | bool isInstField = ((DS.getStorageClassSpec() == DeclSpec::SCS_unspecified || | ||||||||||
3322 | DS.getStorageClassSpec() == DeclSpec::SCS_mutable) && | ||||||||||
3323 | !isFunc); | ||||||||||
3324 | |||||||||||
3325 | if (DS.hasConstexprSpecifier() && isInstField) { | ||||||||||
3326 | SemaDiagnosticBuilder B = | ||||||||||
3327 | Diag(DS.getConstexprSpecLoc(), diag::err_invalid_constexpr_member); | ||||||||||
3328 | SourceLocation ConstexprLoc = DS.getConstexprSpecLoc(); | ||||||||||
3329 | if (InitStyle == ICIS_NoInit) { | ||||||||||
3330 | B << 0 << 0; | ||||||||||
3331 | if (D.getDeclSpec().getTypeQualifiers() & DeclSpec::TQ_const) | ||||||||||
3332 | B << FixItHint::CreateRemoval(ConstexprLoc); | ||||||||||
3333 | else { | ||||||||||
3334 | B << FixItHint::CreateReplacement(ConstexprLoc, "const"); | ||||||||||
3335 | D.getMutableDeclSpec().ClearConstexprSpec(); | ||||||||||
3336 | const char *PrevSpec; | ||||||||||
3337 | unsigned DiagID; | ||||||||||
3338 | bool Failed = D.getMutableDeclSpec().SetTypeQual( | ||||||||||
3339 | DeclSpec::TQ_const, ConstexprLoc, PrevSpec, DiagID, getLangOpts()); | ||||||||||
3340 | (void)Failed; | ||||||||||
3341 | assert(!Failed && "Making a constexpr member const shouldn't fail")(static_cast <bool> (!Failed && "Making a constexpr member const shouldn't fail" ) ? void (0) : __assert_fail ("!Failed && \"Making a constexpr member const shouldn't fail\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3341, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3342 | } | ||||||||||
3343 | } else { | ||||||||||
3344 | B << 1; | ||||||||||
3345 | const char *PrevSpec; | ||||||||||
3346 | unsigned DiagID; | ||||||||||
3347 | if (D.getMutableDeclSpec().SetStorageClassSpec( | ||||||||||
3348 | *this, DeclSpec::SCS_static, ConstexprLoc, PrevSpec, DiagID, | ||||||||||
3349 | Context.getPrintingPolicy())) { | ||||||||||
3350 | assert(DS.getStorageClassSpec() == DeclSpec::SCS_mutable &&(static_cast <bool> (DS.getStorageClassSpec() == DeclSpec ::SCS_mutable && "This is the only DeclSpec that should fail to be applied" ) ? void (0) : __assert_fail ("DS.getStorageClassSpec() == DeclSpec::SCS_mutable && \"This is the only DeclSpec that should fail to be applied\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3351, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
3351 | "This is the only DeclSpec that should fail to be applied")(static_cast <bool> (DS.getStorageClassSpec() == DeclSpec ::SCS_mutable && "This is the only DeclSpec that should fail to be applied" ) ? void (0) : __assert_fail ("DS.getStorageClassSpec() == DeclSpec::SCS_mutable && \"This is the only DeclSpec that should fail to be applied\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3351, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3352 | B << 1; | ||||||||||
3353 | } else { | ||||||||||
3354 | B << 0 << FixItHint::CreateInsertion(ConstexprLoc, "static "); | ||||||||||
3355 | isInstField = false; | ||||||||||
3356 | } | ||||||||||
3357 | } | ||||||||||
3358 | } | ||||||||||
3359 | |||||||||||
3360 | NamedDecl *Member; | ||||||||||
3361 | if (isInstField) { | ||||||||||
3362 | CXXScopeSpec &SS = D.getCXXScopeSpec(); | ||||||||||
3363 | |||||||||||
3364 | // Data members must have identifiers for names. | ||||||||||
3365 | if (!Name.isIdentifier()) { | ||||||||||
3366 | Diag(Loc, diag::err_bad_variable_name) | ||||||||||
3367 | << Name; | ||||||||||
3368 | return nullptr; | ||||||||||
3369 | } | ||||||||||
3370 | |||||||||||
3371 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | ||||||||||
3372 | |||||||||||
3373 | // Member field could not be with "template" keyword. | ||||||||||
3374 | // So TemplateParameterLists should be empty in this case. | ||||||||||
3375 | if (TemplateParameterLists.size()) { | ||||||||||
3376 | TemplateParameterList* TemplateParams = TemplateParameterLists[0]; | ||||||||||
3377 | if (TemplateParams->size()) { | ||||||||||
3378 | // There is no such thing as a member field template. | ||||||||||
3379 | Diag(D.getIdentifierLoc(), diag::err_template_member) | ||||||||||
3380 | << II | ||||||||||
3381 | << SourceRange(TemplateParams->getTemplateLoc(), | ||||||||||
3382 | TemplateParams->getRAngleLoc()); | ||||||||||
3383 | } else { | ||||||||||
3384 | // There is an extraneous 'template<>' for this member. | ||||||||||
3385 | Diag(TemplateParams->getTemplateLoc(), | ||||||||||
3386 | diag::err_template_member_noparams) | ||||||||||
3387 | << II | ||||||||||
3388 | << SourceRange(TemplateParams->getTemplateLoc(), | ||||||||||
3389 | TemplateParams->getRAngleLoc()); | ||||||||||
3390 | } | ||||||||||
3391 | return nullptr; | ||||||||||
3392 | } | ||||||||||
3393 | |||||||||||
3394 | if (SS.isSet() && !SS.isInvalid()) { | ||||||||||
3395 | // The user provided a superfluous scope specifier inside a class | ||||||||||
3396 | // definition: | ||||||||||
3397 | // | ||||||||||
3398 | // class X { | ||||||||||
3399 | // int X::member; | ||||||||||
3400 | // }; | ||||||||||
3401 | if (DeclContext *DC = computeDeclContext(SS, false)) | ||||||||||
3402 | diagnoseQualifiedDeclaration(SS, DC, Name, D.getIdentifierLoc(), | ||||||||||
3403 | D.getName().getKind() == | ||||||||||
3404 | UnqualifiedIdKind::IK_TemplateId); | ||||||||||
3405 | else | ||||||||||
3406 | Diag(D.getIdentifierLoc(), diag::err_member_qualification) | ||||||||||
3407 | << Name << SS.getRange(); | ||||||||||
3408 | |||||||||||
3409 | SS.clear(); | ||||||||||
3410 | } | ||||||||||
3411 | |||||||||||
3412 | if (MSPropertyAttr) { | ||||||||||
3413 | Member = HandleMSProperty(S, cast<CXXRecordDecl>(CurContext), Loc, D, | ||||||||||
3414 | BitWidth, InitStyle, AS, *MSPropertyAttr); | ||||||||||
3415 | if (!Member) | ||||||||||
3416 | return nullptr; | ||||||||||
3417 | isInstField = false; | ||||||||||
3418 | } else { | ||||||||||
3419 | Member = HandleField(S, cast<CXXRecordDecl>(CurContext), Loc, D, | ||||||||||
3420 | BitWidth, InitStyle, AS); | ||||||||||
3421 | if (!Member) | ||||||||||
3422 | return nullptr; | ||||||||||
3423 | } | ||||||||||
3424 | |||||||||||
3425 | CheckShadowInheritedFields(Loc, Name, cast<CXXRecordDecl>(CurContext)); | ||||||||||
3426 | } else { | ||||||||||
3427 | Member = HandleDeclarator(S, D, TemplateParameterLists); | ||||||||||
3428 | if (!Member) | ||||||||||
3429 | return nullptr; | ||||||||||
3430 | |||||||||||
3431 | // Non-instance-fields can't have a bitfield. | ||||||||||
3432 | if (BitWidth) { | ||||||||||
3433 | if (Member->isInvalidDecl()) { | ||||||||||
3434 | // don't emit another diagnostic. | ||||||||||
3435 | } else if (isa<VarDecl>(Member) || isa<VarTemplateDecl>(Member)) { | ||||||||||
3436 | // C++ 9.6p3: A bit-field shall not be a static member. | ||||||||||
3437 | // "static member 'A' cannot be a bit-field" | ||||||||||
3438 | Diag(Loc, diag::err_static_not_bitfield) | ||||||||||
3439 | << Name << BitWidth->getSourceRange(); | ||||||||||
3440 | } else if (isa<TypedefDecl>(Member)) { | ||||||||||
3441 | // "typedef member 'x' cannot be a bit-field" | ||||||||||
3442 | Diag(Loc, diag::err_typedef_not_bitfield) | ||||||||||
3443 | << Name << BitWidth->getSourceRange(); | ||||||||||
3444 | } else { | ||||||||||
3445 | // A function typedef ("typedef int f(); f a;"). | ||||||||||
3446 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. | ||||||||||
3447 | Diag(Loc, diag::err_not_integral_type_bitfield) | ||||||||||
3448 | << Name << cast<ValueDecl>(Member)->getType() | ||||||||||
3449 | << BitWidth->getSourceRange(); | ||||||||||
3450 | } | ||||||||||
3451 | |||||||||||
3452 | BitWidth = nullptr; | ||||||||||
3453 | Member->setInvalidDecl(); | ||||||||||
3454 | } | ||||||||||
3455 | |||||||||||
3456 | NamedDecl *NonTemplateMember = Member; | ||||||||||
3457 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Member)) | ||||||||||
3458 | NonTemplateMember = FunTmpl->getTemplatedDecl(); | ||||||||||
3459 | else if (VarTemplateDecl *VarTmpl = dyn_cast<VarTemplateDecl>(Member)) | ||||||||||
3460 | NonTemplateMember = VarTmpl->getTemplatedDecl(); | ||||||||||
3461 | |||||||||||
3462 | Member->setAccess(AS); | ||||||||||
3463 | |||||||||||
3464 | // If we have declared a member function template or static data member | ||||||||||
3465 | // template, set the access of the templated declaration as well. | ||||||||||
3466 | if (NonTemplateMember != Member) | ||||||||||
3467 | NonTemplateMember->setAccess(AS); | ||||||||||
3468 | |||||||||||
3469 | // C++ [temp.deduct.guide]p3: | ||||||||||
3470 | // A deduction guide [...] for a member class template [shall be | ||||||||||
3471 | // declared] with the same access [as the template]. | ||||||||||
3472 | if (auto *DG = dyn_cast<CXXDeductionGuideDecl>(NonTemplateMember)) { | ||||||||||
3473 | auto *TD = DG->getDeducedTemplate(); | ||||||||||
3474 | // Access specifiers are only meaningful if both the template and the | ||||||||||
3475 | // deduction guide are from the same scope. | ||||||||||
3476 | if (AS != TD->getAccess() && | ||||||||||
3477 | TD->getDeclContext()->getRedeclContext()->Equals( | ||||||||||
3478 | DG->getDeclContext()->getRedeclContext())) { | ||||||||||
3479 | Diag(DG->getBeginLoc(), diag::err_deduction_guide_wrong_access); | ||||||||||
3480 | Diag(TD->getBeginLoc(), diag::note_deduction_guide_template_access) | ||||||||||
3481 | << TD->getAccess(); | ||||||||||
3482 | const AccessSpecDecl *LastAccessSpec = nullptr; | ||||||||||
3483 | for (const auto *D : cast<CXXRecordDecl>(CurContext)->decls()) { | ||||||||||
3484 | if (const auto *AccessSpec = dyn_cast<AccessSpecDecl>(D)) | ||||||||||
3485 | LastAccessSpec = AccessSpec; | ||||||||||
3486 | } | ||||||||||
3487 | assert(LastAccessSpec && "differing access with no access specifier")(static_cast <bool> (LastAccessSpec && "differing access with no access specifier" ) ? void (0) : __assert_fail ("LastAccessSpec && \"differing access with no access specifier\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3487, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3488 | Diag(LastAccessSpec->getBeginLoc(), diag::note_deduction_guide_access) | ||||||||||
3489 | << AS; | ||||||||||
3490 | } | ||||||||||
3491 | } | ||||||||||
3492 | } | ||||||||||
3493 | |||||||||||
3494 | if (VS.isOverrideSpecified()) | ||||||||||
3495 | Member->addAttr(OverrideAttr::Create(Context, VS.getOverrideLoc(), | ||||||||||
3496 | AttributeCommonInfo::AS_Keyword)); | ||||||||||
3497 | if (VS.isFinalSpecified()) | ||||||||||
3498 | Member->addAttr(FinalAttr::Create( | ||||||||||
3499 | Context, VS.getFinalLoc(), AttributeCommonInfo::AS_Keyword, | ||||||||||
3500 | static_cast<FinalAttr::Spelling>(VS.isFinalSpelledSealed()))); | ||||||||||
3501 | |||||||||||
3502 | if (VS.getLastLocation().isValid()) { | ||||||||||
3503 | // Update the end location of a method that has a virt-specifiers. | ||||||||||
3504 | if (CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(Member)) | ||||||||||
3505 | MD->setRangeEnd(VS.getLastLocation()); | ||||||||||
3506 | } | ||||||||||
3507 | |||||||||||
3508 | CheckOverrideControl(Member); | ||||||||||
3509 | |||||||||||
3510 | assert((Name || isInstField) && "No identifier for non-field ?")(static_cast <bool> ((Name || isInstField) && "No identifier for non-field ?" ) ? void (0) : __assert_fail ("(Name || isInstField) && \"No identifier for non-field ?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3510, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3511 | |||||||||||
3512 | if (isInstField) { | ||||||||||
3513 | FieldDecl *FD = cast<FieldDecl>(Member); | ||||||||||
3514 | FieldCollector->Add(FD); | ||||||||||
3515 | |||||||||||
3516 | if (!Diags.isIgnored(diag::warn_unused_private_field, FD->getLocation())) { | ||||||||||
3517 | // Remember all explicit private FieldDecls that have a name, no side | ||||||||||
3518 | // effects and are not part of a dependent type declaration. | ||||||||||
3519 | if (!FD->isImplicit() && FD->getDeclName() && | ||||||||||
3520 | FD->getAccess() == AS_private && | ||||||||||
3521 | !FD->hasAttr<UnusedAttr>() && | ||||||||||
3522 | !FD->getParent()->isDependentContext() && | ||||||||||
3523 | !InitializationHasSideEffects(*FD)) | ||||||||||
3524 | UnusedPrivateFields.insert(FD); | ||||||||||
3525 | } | ||||||||||
3526 | } | ||||||||||
3527 | |||||||||||
3528 | return Member; | ||||||||||
3529 | } | ||||||||||
3530 | |||||||||||
3531 | namespace { | ||||||||||
3532 | class UninitializedFieldVisitor | ||||||||||
3533 | : public EvaluatedExprVisitor<UninitializedFieldVisitor> { | ||||||||||
3534 | Sema &S; | ||||||||||
3535 | // List of Decls to generate a warning on. Also remove Decls that become | ||||||||||
3536 | // initialized. | ||||||||||
3537 | llvm::SmallPtrSetImpl<ValueDecl*> &Decls; | ||||||||||
3538 | // List of base classes of the record. Classes are removed after their | ||||||||||
3539 | // initializers. | ||||||||||
3540 | llvm::SmallPtrSetImpl<QualType> &BaseClasses; | ||||||||||
3541 | // Vector of decls to be removed from the Decl set prior to visiting the | ||||||||||
3542 | // nodes. These Decls may have been initialized in the prior initializer. | ||||||||||
3543 | llvm::SmallVector<ValueDecl*, 4> DeclsToRemove; | ||||||||||
3544 | // If non-null, add a note to the warning pointing back to the constructor. | ||||||||||
3545 | const CXXConstructorDecl *Constructor; | ||||||||||
3546 | // Variables to hold state when processing an initializer list. When | ||||||||||
3547 | // InitList is true, special case initialization of FieldDecls matching | ||||||||||
3548 | // InitListFieldDecl. | ||||||||||
3549 | bool InitList; | ||||||||||
3550 | FieldDecl *InitListFieldDecl; | ||||||||||
3551 | llvm::SmallVector<unsigned, 4> InitFieldIndex; | ||||||||||
3552 | |||||||||||
3553 | public: | ||||||||||
3554 | typedef EvaluatedExprVisitor<UninitializedFieldVisitor> Inherited; | ||||||||||
3555 | UninitializedFieldVisitor(Sema &S, | ||||||||||
3556 | llvm::SmallPtrSetImpl<ValueDecl*> &Decls, | ||||||||||
3557 | llvm::SmallPtrSetImpl<QualType> &BaseClasses) | ||||||||||
3558 | : Inherited(S.Context), S(S), Decls(Decls), BaseClasses(BaseClasses), | ||||||||||
3559 | Constructor(nullptr), InitList(false), InitListFieldDecl(nullptr) {} | ||||||||||
3560 | |||||||||||
3561 | // Returns true if the use of ME is not an uninitialized use. | ||||||||||
3562 | bool IsInitListMemberExprInitialized(MemberExpr *ME, | ||||||||||
3563 | bool CheckReferenceOnly) { | ||||||||||
3564 | llvm::SmallVector<FieldDecl*, 4> Fields; | ||||||||||
3565 | bool ReferenceField = false; | ||||||||||
3566 | while (ME) { | ||||||||||
3567 | FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl()); | ||||||||||
3568 | if (!FD) | ||||||||||
3569 | return false; | ||||||||||
3570 | Fields.push_back(FD); | ||||||||||
3571 | if (FD->getType()->isReferenceType()) | ||||||||||
3572 | ReferenceField = true; | ||||||||||
3573 | ME = dyn_cast<MemberExpr>(ME->getBase()->IgnoreParenImpCasts()); | ||||||||||
3574 | } | ||||||||||
3575 | |||||||||||
3576 | // Binding a reference to an uninitialized field is not an | ||||||||||
3577 | // uninitialized use. | ||||||||||
3578 | if (CheckReferenceOnly && !ReferenceField) | ||||||||||
3579 | return true; | ||||||||||
3580 | |||||||||||
3581 | llvm::SmallVector<unsigned, 4> UsedFieldIndex; | ||||||||||
3582 | // Discard the first field since it is the field decl that is being | ||||||||||
3583 | // initialized. | ||||||||||
3584 | for (auto I = Fields.rbegin() + 1, E = Fields.rend(); I != E; ++I) { | ||||||||||
3585 | UsedFieldIndex.push_back((*I)->getFieldIndex()); | ||||||||||
3586 | } | ||||||||||
3587 | |||||||||||
3588 | for (auto UsedIter = UsedFieldIndex.begin(), | ||||||||||
3589 | UsedEnd = UsedFieldIndex.end(), | ||||||||||
3590 | OrigIter = InitFieldIndex.begin(), | ||||||||||
3591 | OrigEnd = InitFieldIndex.end(); | ||||||||||
3592 | UsedIter != UsedEnd && OrigIter != OrigEnd; ++UsedIter, ++OrigIter) { | ||||||||||
3593 | if (*UsedIter < *OrigIter) | ||||||||||
3594 | return true; | ||||||||||
3595 | if (*UsedIter > *OrigIter) | ||||||||||
3596 | break; | ||||||||||
3597 | } | ||||||||||
3598 | |||||||||||
3599 | return false; | ||||||||||
3600 | } | ||||||||||
3601 | |||||||||||
3602 | void HandleMemberExpr(MemberExpr *ME, bool CheckReferenceOnly, | ||||||||||
3603 | bool AddressOf) { | ||||||||||
3604 | if (isa<EnumConstantDecl>(ME->getMemberDecl())) | ||||||||||
3605 | return; | ||||||||||
3606 | |||||||||||
3607 | // FieldME is the inner-most MemberExpr that is not an anonymous struct | ||||||||||
3608 | // or union. | ||||||||||
3609 | MemberExpr *FieldME = ME; | ||||||||||
3610 | |||||||||||
3611 | bool AllPODFields = FieldME->getType().isPODType(S.Context); | ||||||||||
3612 | |||||||||||
3613 | Expr *Base = ME; | ||||||||||
3614 | while (MemberExpr *SubME = | ||||||||||
3615 | dyn_cast<MemberExpr>(Base->IgnoreParenImpCasts())) { | ||||||||||
3616 | |||||||||||
3617 | if (isa<VarDecl>(SubME->getMemberDecl())) | ||||||||||
3618 | return; | ||||||||||
3619 | |||||||||||
3620 | if (FieldDecl *FD = dyn_cast<FieldDecl>(SubME->getMemberDecl())) | ||||||||||
3621 | if (!FD->isAnonymousStructOrUnion()) | ||||||||||
3622 | FieldME = SubME; | ||||||||||
3623 | |||||||||||
3624 | if (!FieldME->getType().isPODType(S.Context)) | ||||||||||
3625 | AllPODFields = false; | ||||||||||
3626 | |||||||||||
3627 | Base = SubME->getBase(); | ||||||||||
3628 | } | ||||||||||
3629 | |||||||||||
3630 | if (!isa<CXXThisExpr>(Base->IgnoreParenImpCasts())) { | ||||||||||
3631 | Visit(Base); | ||||||||||
3632 | return; | ||||||||||
3633 | } | ||||||||||
3634 | |||||||||||
3635 | if (AddressOf && AllPODFields) | ||||||||||
3636 | return; | ||||||||||
3637 | |||||||||||
3638 | ValueDecl* FoundVD = FieldME->getMemberDecl(); | ||||||||||
3639 | |||||||||||
3640 | if (ImplicitCastExpr *BaseCast = dyn_cast<ImplicitCastExpr>(Base)) { | ||||||||||
3641 | while (isa<ImplicitCastExpr>(BaseCast->getSubExpr())) { | ||||||||||
3642 | BaseCast = cast<ImplicitCastExpr>(BaseCast->getSubExpr()); | ||||||||||
3643 | } | ||||||||||
3644 | |||||||||||
3645 | if (BaseCast->getCastKind() == CK_UncheckedDerivedToBase) { | ||||||||||
3646 | QualType T = BaseCast->getType(); | ||||||||||
3647 | if (T->isPointerType() && | ||||||||||
3648 | BaseClasses.count(T->getPointeeType())) { | ||||||||||
3649 | S.Diag(FieldME->getExprLoc(), diag::warn_base_class_is_uninit) | ||||||||||
3650 | << T->getPointeeType() << FoundVD; | ||||||||||
3651 | } | ||||||||||
3652 | } | ||||||||||
3653 | } | ||||||||||
3654 | |||||||||||
3655 | if (!Decls.count(FoundVD)) | ||||||||||
3656 | return; | ||||||||||
3657 | |||||||||||
3658 | const bool IsReference = FoundVD->getType()->isReferenceType(); | ||||||||||
3659 | |||||||||||
3660 | if (InitList && !AddressOf && FoundVD == InitListFieldDecl) { | ||||||||||
3661 | // Special checking for initializer lists. | ||||||||||
3662 | if (IsInitListMemberExprInitialized(ME, CheckReferenceOnly)) { | ||||||||||
3663 | return; | ||||||||||
3664 | } | ||||||||||
3665 | } else { | ||||||||||
3666 | // Prevent double warnings on use of unbounded references. | ||||||||||
3667 | if (CheckReferenceOnly && !IsReference) | ||||||||||
3668 | return; | ||||||||||
3669 | } | ||||||||||
3670 | |||||||||||
3671 | unsigned diag = IsReference | ||||||||||
3672 | ? diag::warn_reference_field_is_uninit | ||||||||||
3673 | : diag::warn_field_is_uninit; | ||||||||||
3674 | S.Diag(FieldME->getExprLoc(), diag) << FoundVD; | ||||||||||
3675 | if (Constructor) | ||||||||||
3676 | S.Diag(Constructor->getLocation(), | ||||||||||
3677 | diag::note_uninit_in_this_constructor) | ||||||||||
3678 | << (Constructor->isDefaultConstructor() && Constructor->isImplicit()); | ||||||||||
3679 | |||||||||||
3680 | } | ||||||||||
3681 | |||||||||||
3682 | void HandleValue(Expr *E, bool AddressOf) { | ||||||||||
3683 | E = E->IgnoreParens(); | ||||||||||
3684 | |||||||||||
3685 | if (MemberExpr *ME = dyn_cast<MemberExpr>(E)) { | ||||||||||
3686 | HandleMemberExpr(ME, false /*CheckReferenceOnly*/, | ||||||||||
3687 | AddressOf /*AddressOf*/); | ||||||||||
3688 | return; | ||||||||||
3689 | } | ||||||||||
3690 | |||||||||||
3691 | if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) { | ||||||||||
3692 | Visit(CO->getCond()); | ||||||||||
3693 | HandleValue(CO->getTrueExpr(), AddressOf); | ||||||||||
3694 | HandleValue(CO->getFalseExpr(), AddressOf); | ||||||||||
3695 | return; | ||||||||||
3696 | } | ||||||||||
3697 | |||||||||||
3698 | if (BinaryConditionalOperator *BCO = | ||||||||||
3699 | dyn_cast<BinaryConditionalOperator>(E)) { | ||||||||||
3700 | Visit(BCO->getCond()); | ||||||||||
3701 | HandleValue(BCO->getFalseExpr(), AddressOf); | ||||||||||
3702 | return; | ||||||||||
3703 | } | ||||||||||
3704 | |||||||||||
3705 | if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(E)) { | ||||||||||
3706 | HandleValue(OVE->getSourceExpr(), AddressOf); | ||||||||||
3707 | return; | ||||||||||
3708 | } | ||||||||||
3709 | |||||||||||
3710 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | ||||||||||
3711 | switch (BO->getOpcode()) { | ||||||||||
3712 | default: | ||||||||||
3713 | break; | ||||||||||
3714 | case(BO_PtrMemD): | ||||||||||
3715 | case(BO_PtrMemI): | ||||||||||
3716 | HandleValue(BO->getLHS(), AddressOf); | ||||||||||
3717 | Visit(BO->getRHS()); | ||||||||||
3718 | return; | ||||||||||
3719 | case(BO_Comma): | ||||||||||
3720 | Visit(BO->getLHS()); | ||||||||||
3721 | HandleValue(BO->getRHS(), AddressOf); | ||||||||||
3722 | return; | ||||||||||
3723 | } | ||||||||||
3724 | } | ||||||||||
3725 | |||||||||||
3726 | Visit(E); | ||||||||||
3727 | } | ||||||||||
3728 | |||||||||||
3729 | void CheckInitListExpr(InitListExpr *ILE) { | ||||||||||
3730 | InitFieldIndex.push_back(0); | ||||||||||
3731 | for (auto Child : ILE->children()) { | ||||||||||
3732 | if (InitListExpr *SubList = dyn_cast<InitListExpr>(Child)) { | ||||||||||
3733 | CheckInitListExpr(SubList); | ||||||||||
3734 | } else { | ||||||||||
3735 | Visit(Child); | ||||||||||
3736 | } | ||||||||||
3737 | ++InitFieldIndex.back(); | ||||||||||
3738 | } | ||||||||||
3739 | InitFieldIndex.pop_back(); | ||||||||||
3740 | } | ||||||||||
3741 | |||||||||||
3742 | void CheckInitializer(Expr *E, const CXXConstructorDecl *FieldConstructor, | ||||||||||
3743 | FieldDecl *Field, const Type *BaseClass) { | ||||||||||
3744 | // Remove Decls that may have been initialized in the previous | ||||||||||
3745 | // initializer. | ||||||||||
3746 | for (ValueDecl* VD : DeclsToRemove) | ||||||||||
3747 | Decls.erase(VD); | ||||||||||
3748 | DeclsToRemove.clear(); | ||||||||||
3749 | |||||||||||
3750 | Constructor = FieldConstructor; | ||||||||||
3751 | InitListExpr *ILE = dyn_cast<InitListExpr>(E); | ||||||||||
3752 | |||||||||||
3753 | if (ILE && Field) { | ||||||||||
3754 | InitList = true; | ||||||||||
3755 | InitListFieldDecl = Field; | ||||||||||
3756 | InitFieldIndex.clear(); | ||||||||||
3757 | CheckInitListExpr(ILE); | ||||||||||
3758 | } else { | ||||||||||
3759 | InitList = false; | ||||||||||
3760 | Visit(E); | ||||||||||
3761 | } | ||||||||||
3762 | |||||||||||
3763 | if (Field) | ||||||||||
3764 | Decls.erase(Field); | ||||||||||
3765 | if (BaseClass) | ||||||||||
3766 | BaseClasses.erase(BaseClass->getCanonicalTypeInternal()); | ||||||||||
3767 | } | ||||||||||
3768 | |||||||||||
3769 | void VisitMemberExpr(MemberExpr *ME) { | ||||||||||
3770 | // All uses of unbounded reference fields will warn. | ||||||||||
3771 | HandleMemberExpr(ME, true /*CheckReferenceOnly*/, false /*AddressOf*/); | ||||||||||
3772 | } | ||||||||||
3773 | |||||||||||
3774 | void VisitImplicitCastExpr(ImplicitCastExpr *E) { | ||||||||||
3775 | if (E->getCastKind() == CK_LValueToRValue) { | ||||||||||
3776 | HandleValue(E->getSubExpr(), false /*AddressOf*/); | ||||||||||
3777 | return; | ||||||||||
3778 | } | ||||||||||
3779 | |||||||||||
3780 | Inherited::VisitImplicitCastExpr(E); | ||||||||||
3781 | } | ||||||||||
3782 | |||||||||||
3783 | void VisitCXXConstructExpr(CXXConstructExpr *E) { | ||||||||||
3784 | if (E->getConstructor()->isCopyConstructor()) { | ||||||||||
3785 | Expr *ArgExpr = E->getArg(0); | ||||||||||
3786 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(ArgExpr)) | ||||||||||
3787 | if (ILE->getNumInits() == 1) | ||||||||||
3788 | ArgExpr = ILE->getInit(0); | ||||||||||
3789 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr)) | ||||||||||
3790 | if (ICE->getCastKind() == CK_NoOp) | ||||||||||
3791 | ArgExpr = ICE->getSubExpr(); | ||||||||||
3792 | HandleValue(ArgExpr, false /*AddressOf*/); | ||||||||||
3793 | return; | ||||||||||
3794 | } | ||||||||||
3795 | Inherited::VisitCXXConstructExpr(E); | ||||||||||
3796 | } | ||||||||||
3797 | |||||||||||
3798 | void VisitCXXMemberCallExpr(CXXMemberCallExpr *E) { | ||||||||||
3799 | Expr *Callee = E->getCallee(); | ||||||||||
3800 | if (isa<MemberExpr>(Callee)) { | ||||||||||
3801 | HandleValue(Callee, false /*AddressOf*/); | ||||||||||
3802 | for (auto Arg : E->arguments()) | ||||||||||
3803 | Visit(Arg); | ||||||||||
3804 | return; | ||||||||||
3805 | } | ||||||||||
3806 | |||||||||||
3807 | Inherited::VisitCXXMemberCallExpr(E); | ||||||||||
3808 | } | ||||||||||
3809 | |||||||||||
3810 | void VisitCallExpr(CallExpr *E) { | ||||||||||
3811 | // Treat std::move as a use. | ||||||||||
3812 | if (E->isCallToStdMove()) { | ||||||||||
3813 | HandleValue(E->getArg(0), /*AddressOf=*/false); | ||||||||||
3814 | return; | ||||||||||
3815 | } | ||||||||||
3816 | |||||||||||
3817 | Inherited::VisitCallExpr(E); | ||||||||||
3818 | } | ||||||||||
3819 | |||||||||||
3820 | void VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) { | ||||||||||
3821 | Expr *Callee = E->getCallee(); | ||||||||||
3822 | |||||||||||
3823 | if (isa<UnresolvedLookupExpr>(Callee)) | ||||||||||
3824 | return Inherited::VisitCXXOperatorCallExpr(E); | ||||||||||
3825 | |||||||||||
3826 | Visit(Callee); | ||||||||||
3827 | for (auto Arg : E->arguments()) | ||||||||||
3828 | HandleValue(Arg->IgnoreParenImpCasts(), false /*AddressOf*/); | ||||||||||
3829 | } | ||||||||||
3830 | |||||||||||
3831 | void VisitBinaryOperator(BinaryOperator *E) { | ||||||||||
3832 | // If a field assignment is detected, remove the field from the | ||||||||||
3833 | // uninitiailized field set. | ||||||||||
3834 | if (E->getOpcode() == BO_Assign) | ||||||||||
3835 | if (MemberExpr *ME = dyn_cast<MemberExpr>(E->getLHS())) | ||||||||||
3836 | if (FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) | ||||||||||
3837 | if (!FD->getType()->isReferenceType()) | ||||||||||
3838 | DeclsToRemove.push_back(FD); | ||||||||||
3839 | |||||||||||
3840 | if (E->isCompoundAssignmentOp()) { | ||||||||||
3841 | HandleValue(E->getLHS(), false /*AddressOf*/); | ||||||||||
3842 | Visit(E->getRHS()); | ||||||||||
3843 | return; | ||||||||||
3844 | } | ||||||||||
3845 | |||||||||||
3846 | Inherited::VisitBinaryOperator(E); | ||||||||||
3847 | } | ||||||||||
3848 | |||||||||||
3849 | void VisitUnaryOperator(UnaryOperator *E) { | ||||||||||
3850 | if (E->isIncrementDecrementOp()) { | ||||||||||
3851 | HandleValue(E->getSubExpr(), false /*AddressOf*/); | ||||||||||
3852 | return; | ||||||||||
3853 | } | ||||||||||
3854 | if (E->getOpcode() == UO_AddrOf) { | ||||||||||
3855 | if (MemberExpr *ME = dyn_cast<MemberExpr>(E->getSubExpr())) { | ||||||||||
3856 | HandleValue(ME->getBase(), true /*AddressOf*/); | ||||||||||
3857 | return; | ||||||||||
3858 | } | ||||||||||
3859 | } | ||||||||||
3860 | |||||||||||
3861 | Inherited::VisitUnaryOperator(E); | ||||||||||
3862 | } | ||||||||||
3863 | }; | ||||||||||
3864 | |||||||||||
3865 | // Diagnose value-uses of fields to initialize themselves, e.g. | ||||||||||
3866 | // foo(foo) | ||||||||||
3867 | // where foo is not also a parameter to the constructor. | ||||||||||
3868 | // Also diagnose across field uninitialized use such as | ||||||||||
3869 | // x(y), y(x) | ||||||||||
3870 | // TODO: implement -Wuninitialized and fold this into that framework. | ||||||||||
3871 | static void DiagnoseUninitializedFields( | ||||||||||
3872 | Sema &SemaRef, const CXXConstructorDecl *Constructor) { | ||||||||||
3873 | |||||||||||
3874 | if (SemaRef.getDiagnostics().isIgnored(diag::warn_field_is_uninit, | ||||||||||
3875 | Constructor->getLocation())) { | ||||||||||
3876 | return; | ||||||||||
3877 | } | ||||||||||
3878 | |||||||||||
3879 | if (Constructor->isInvalidDecl()) | ||||||||||
3880 | return; | ||||||||||
3881 | |||||||||||
3882 | const CXXRecordDecl *RD = Constructor->getParent(); | ||||||||||
3883 | |||||||||||
3884 | if (RD->isDependentContext()) | ||||||||||
3885 | return; | ||||||||||
3886 | |||||||||||
3887 | // Holds fields that are uninitialized. | ||||||||||
3888 | llvm::SmallPtrSet<ValueDecl*, 4> UninitializedFields; | ||||||||||
3889 | |||||||||||
3890 | // At the beginning, all fields are uninitialized. | ||||||||||
3891 | for (auto *I : RD->decls()) { | ||||||||||
3892 | if (auto *FD = dyn_cast<FieldDecl>(I)) { | ||||||||||
3893 | UninitializedFields.insert(FD); | ||||||||||
3894 | } else if (auto *IFD = dyn_cast<IndirectFieldDecl>(I)) { | ||||||||||
3895 | UninitializedFields.insert(IFD->getAnonField()); | ||||||||||
3896 | } | ||||||||||
3897 | } | ||||||||||
3898 | |||||||||||
3899 | llvm::SmallPtrSet<QualType, 4> UninitializedBaseClasses; | ||||||||||
3900 | for (auto I : RD->bases()) | ||||||||||
3901 | UninitializedBaseClasses.insert(I.getType().getCanonicalType()); | ||||||||||
3902 | |||||||||||
3903 | if (UninitializedFields.empty() && UninitializedBaseClasses.empty()) | ||||||||||
3904 | return; | ||||||||||
3905 | |||||||||||
3906 | UninitializedFieldVisitor UninitializedChecker(SemaRef, | ||||||||||
3907 | UninitializedFields, | ||||||||||
3908 | UninitializedBaseClasses); | ||||||||||
3909 | |||||||||||
3910 | for (const auto *FieldInit : Constructor->inits()) { | ||||||||||
3911 | if (UninitializedFields.empty() && UninitializedBaseClasses.empty()) | ||||||||||
3912 | break; | ||||||||||
3913 | |||||||||||
3914 | Expr *InitExpr = FieldInit->getInit(); | ||||||||||
3915 | if (!InitExpr) | ||||||||||
3916 | continue; | ||||||||||
3917 | |||||||||||
3918 | if (CXXDefaultInitExpr *Default = | ||||||||||
3919 | dyn_cast<CXXDefaultInitExpr>(InitExpr)) { | ||||||||||
3920 | InitExpr = Default->getExpr(); | ||||||||||
3921 | if (!InitExpr) | ||||||||||
3922 | continue; | ||||||||||
3923 | // In class initializers will point to the constructor. | ||||||||||
3924 | UninitializedChecker.CheckInitializer(InitExpr, Constructor, | ||||||||||
3925 | FieldInit->getAnyMember(), | ||||||||||
3926 | FieldInit->getBaseClass()); | ||||||||||
3927 | } else { | ||||||||||
3928 | UninitializedChecker.CheckInitializer(InitExpr, nullptr, | ||||||||||
3929 | FieldInit->getAnyMember(), | ||||||||||
3930 | FieldInit->getBaseClass()); | ||||||||||
3931 | } | ||||||||||
3932 | } | ||||||||||
3933 | } | ||||||||||
3934 | } // namespace | ||||||||||
3935 | |||||||||||
3936 | /// Enter a new C++ default initializer scope. After calling this, the | ||||||||||
3937 | /// caller must call \ref ActOnFinishCXXInClassMemberInitializer, even if | ||||||||||
3938 | /// parsing or instantiating the initializer failed. | ||||||||||
3939 | void Sema::ActOnStartCXXInClassMemberInitializer() { | ||||||||||
3940 | // Create a synthetic function scope to represent the call to the constructor | ||||||||||
3941 | // that notionally surrounds a use of this initializer. | ||||||||||
3942 | PushFunctionScope(); | ||||||||||
3943 | } | ||||||||||
3944 | |||||||||||
3945 | void Sema::ActOnStartTrailingRequiresClause(Scope *S, Declarator &D) { | ||||||||||
3946 | if (!D.isFunctionDeclarator()) | ||||||||||
3947 | return; | ||||||||||
3948 | auto &FTI = D.getFunctionTypeInfo(); | ||||||||||
3949 | if (!FTI.Params) | ||||||||||
3950 | return; | ||||||||||
3951 | for (auto &Param : ArrayRef<DeclaratorChunk::ParamInfo>(FTI.Params, | ||||||||||
3952 | FTI.NumParams)) { | ||||||||||
3953 | auto *ParamDecl = cast<NamedDecl>(Param.Param); | ||||||||||
3954 | if (ParamDecl->getDeclName()) | ||||||||||
3955 | PushOnScopeChains(ParamDecl, S, /*AddToContext=*/false); | ||||||||||
3956 | } | ||||||||||
3957 | } | ||||||||||
3958 | |||||||||||
3959 | ExprResult Sema::ActOnFinishTrailingRequiresClause(ExprResult ConstraintExpr) { | ||||||||||
3960 | return ActOnRequiresClause(ConstraintExpr); | ||||||||||
3961 | } | ||||||||||
3962 | |||||||||||
3963 | ExprResult Sema::ActOnRequiresClause(ExprResult ConstraintExpr) { | ||||||||||
3964 | if (ConstraintExpr.isInvalid()) | ||||||||||
3965 | return ExprError(); | ||||||||||
3966 | |||||||||||
3967 | ConstraintExpr = CorrectDelayedTyposInExpr(ConstraintExpr); | ||||||||||
3968 | if (ConstraintExpr.isInvalid()) | ||||||||||
3969 | return ExprError(); | ||||||||||
3970 | |||||||||||
3971 | if (DiagnoseUnexpandedParameterPack(ConstraintExpr.get(), | ||||||||||
3972 | UPPC_RequiresClause)) | ||||||||||
3973 | return ExprError(); | ||||||||||
3974 | |||||||||||
3975 | return ConstraintExpr; | ||||||||||
3976 | } | ||||||||||
3977 | |||||||||||
3978 | /// This is invoked after parsing an in-class initializer for a | ||||||||||
3979 | /// non-static C++ class member, and after instantiating an in-class initializer | ||||||||||
3980 | /// in a class template. Such actions are deferred until the class is complete. | ||||||||||
3981 | void Sema::ActOnFinishCXXInClassMemberInitializer(Decl *D, | ||||||||||
3982 | SourceLocation InitLoc, | ||||||||||
3983 | Expr *InitExpr) { | ||||||||||
3984 | // Pop the notional constructor scope we created earlier. | ||||||||||
3985 | PopFunctionScopeInfo(nullptr, D); | ||||||||||
3986 | |||||||||||
3987 | FieldDecl *FD = dyn_cast<FieldDecl>(D); | ||||||||||
3988 | assert((isa<MSPropertyDecl>(D) || FD->getInClassInitStyle() != ICIS_NoInit) &&(static_cast <bool> ((isa<MSPropertyDecl>(D) || FD ->getInClassInitStyle() != ICIS_NoInit) && "must set init style when field is created" ) ? void (0) : __assert_fail ("(isa<MSPropertyDecl>(D) || FD->getInClassInitStyle() != ICIS_NoInit) && \"must set init style when field is created\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3989, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
3989 | "must set init style when field is created")(static_cast <bool> ((isa<MSPropertyDecl>(D) || FD ->getInClassInitStyle() != ICIS_NoInit) && "must set init style when field is created" ) ? void (0) : __assert_fail ("(isa<MSPropertyDecl>(D) || FD->getInClassInitStyle() != ICIS_NoInit) && \"must set init style when field is created\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 3989, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
3990 | |||||||||||
3991 | if (!InitExpr) { | ||||||||||
3992 | D->setInvalidDecl(); | ||||||||||
3993 | if (FD) | ||||||||||
3994 | FD->removeInClassInitializer(); | ||||||||||
3995 | return; | ||||||||||
3996 | } | ||||||||||
3997 | |||||||||||
3998 | if (DiagnoseUnexpandedParameterPack(InitExpr, UPPC_Initializer)) { | ||||||||||
3999 | FD->setInvalidDecl(); | ||||||||||
4000 | FD->removeInClassInitializer(); | ||||||||||
4001 | return; | ||||||||||
4002 | } | ||||||||||
4003 | |||||||||||
4004 | ExprResult Init = InitExpr; | ||||||||||
4005 | if (!FD->getType()->isDependentType() && !InitExpr->isTypeDependent()) { | ||||||||||
4006 | InitializedEntity Entity = | ||||||||||
4007 | InitializedEntity::InitializeMemberFromDefaultMemberInitializer(FD); | ||||||||||
4008 | InitializationKind Kind = | ||||||||||
4009 | FD->getInClassInitStyle() == ICIS_ListInit | ||||||||||
4010 | ? InitializationKind::CreateDirectList(InitExpr->getBeginLoc(), | ||||||||||
4011 | InitExpr->getBeginLoc(), | ||||||||||
4012 | InitExpr->getEndLoc()) | ||||||||||
4013 | : InitializationKind::CreateCopy(InitExpr->getBeginLoc(), InitLoc); | ||||||||||
4014 | InitializationSequence Seq(*this, Entity, Kind, InitExpr); | ||||||||||
4015 | Init = Seq.Perform(*this, Entity, Kind, InitExpr); | ||||||||||
4016 | if (Init.isInvalid()) { | ||||||||||
4017 | FD->setInvalidDecl(); | ||||||||||
4018 | return; | ||||||||||
4019 | } | ||||||||||
4020 | } | ||||||||||
4021 | |||||||||||
4022 | // C++11 [class.base.init]p7: | ||||||||||
4023 | // The initialization of each base and member constitutes a | ||||||||||
4024 | // full-expression. | ||||||||||
4025 | Init = ActOnFinishFullExpr(Init.get(), InitLoc, /*DiscardedValue*/ false); | ||||||||||
4026 | if (Init.isInvalid()) { | ||||||||||
4027 | FD->setInvalidDecl(); | ||||||||||
4028 | return; | ||||||||||
4029 | } | ||||||||||
4030 | |||||||||||
4031 | InitExpr = Init.get(); | ||||||||||
4032 | |||||||||||
4033 | FD->setInClassInitializer(InitExpr); | ||||||||||
4034 | } | ||||||||||
4035 | |||||||||||
4036 | /// Find the direct and/or virtual base specifiers that | ||||||||||
4037 | /// correspond to the given base type, for use in base initialization | ||||||||||
4038 | /// within a constructor. | ||||||||||
4039 | static bool FindBaseInitializer(Sema &SemaRef, | ||||||||||
4040 | CXXRecordDecl *ClassDecl, | ||||||||||
4041 | QualType BaseType, | ||||||||||
4042 | const CXXBaseSpecifier *&DirectBaseSpec, | ||||||||||
4043 | const CXXBaseSpecifier *&VirtualBaseSpec) { | ||||||||||
4044 | // First, check for a direct base class. | ||||||||||
4045 | DirectBaseSpec = nullptr; | ||||||||||
4046 | for (const auto &Base : ClassDecl->bases()) { | ||||||||||
4047 | if (SemaRef.Context.hasSameUnqualifiedType(BaseType, Base.getType())) { | ||||||||||
4048 | // We found a direct base of this type. That's what we're | ||||||||||
4049 | // initializing. | ||||||||||
4050 | DirectBaseSpec = &Base; | ||||||||||
4051 | break; | ||||||||||
4052 | } | ||||||||||
4053 | } | ||||||||||
4054 | |||||||||||
4055 | // Check for a virtual base class. | ||||||||||
4056 | // FIXME: We might be able to short-circuit this if we know in advance that | ||||||||||
4057 | // there are no virtual bases. | ||||||||||
4058 | VirtualBaseSpec = nullptr; | ||||||||||
4059 | if (!DirectBaseSpec || !DirectBaseSpec->isVirtual()) { | ||||||||||
4060 | // We haven't found a base yet; search the class hierarchy for a | ||||||||||
4061 | // virtual base class. | ||||||||||
4062 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||||||
4063 | /*DetectVirtual=*/false); | ||||||||||
4064 | if (SemaRef.IsDerivedFrom(ClassDecl->getLocation(), | ||||||||||
4065 | SemaRef.Context.getTypeDeclType(ClassDecl), | ||||||||||
4066 | BaseType, Paths)) { | ||||||||||
4067 | for (CXXBasePaths::paths_iterator Path = Paths.begin(); | ||||||||||
4068 | Path != Paths.end(); ++Path) { | ||||||||||
4069 | if (Path->back().Base->isVirtual()) { | ||||||||||
4070 | VirtualBaseSpec = Path->back().Base; | ||||||||||
4071 | break; | ||||||||||
4072 | } | ||||||||||
4073 | } | ||||||||||
4074 | } | ||||||||||
4075 | } | ||||||||||
4076 | |||||||||||
4077 | return DirectBaseSpec || VirtualBaseSpec; | ||||||||||
4078 | } | ||||||||||
4079 | |||||||||||
4080 | /// Handle a C++ member initializer using braced-init-list syntax. | ||||||||||
4081 | MemInitResult | ||||||||||
4082 | Sema::ActOnMemInitializer(Decl *ConstructorD, | ||||||||||
4083 | Scope *S, | ||||||||||
4084 | CXXScopeSpec &SS, | ||||||||||
4085 | IdentifierInfo *MemberOrBase, | ||||||||||
4086 | ParsedType TemplateTypeTy, | ||||||||||
4087 | const DeclSpec &DS, | ||||||||||
4088 | SourceLocation IdLoc, | ||||||||||
4089 | Expr *InitList, | ||||||||||
4090 | SourceLocation EllipsisLoc) { | ||||||||||
4091 | return BuildMemInitializer(ConstructorD, S, SS, MemberOrBase, TemplateTypeTy, | ||||||||||
| |||||||||||
4092 | DS, IdLoc, InitList, | ||||||||||
4093 | EllipsisLoc); | ||||||||||
4094 | } | ||||||||||
4095 | |||||||||||
4096 | /// Handle a C++ member initializer using parentheses syntax. | ||||||||||
4097 | MemInitResult | ||||||||||
4098 | Sema::ActOnMemInitializer(Decl *ConstructorD, | ||||||||||
4099 | Scope *S, | ||||||||||
4100 | CXXScopeSpec &SS, | ||||||||||
4101 | IdentifierInfo *MemberOrBase, | ||||||||||
4102 | ParsedType TemplateTypeTy, | ||||||||||
4103 | const DeclSpec &DS, | ||||||||||
4104 | SourceLocation IdLoc, | ||||||||||
4105 | SourceLocation LParenLoc, | ||||||||||
4106 | ArrayRef<Expr *> Args, | ||||||||||
4107 | SourceLocation RParenLoc, | ||||||||||
4108 | SourceLocation EllipsisLoc) { | ||||||||||
4109 | Expr *List = ParenListExpr::Create(Context, LParenLoc, Args, RParenLoc); | ||||||||||
4110 | return BuildMemInitializer(ConstructorD, S, SS, MemberOrBase, TemplateTypeTy, | ||||||||||
4111 | DS, IdLoc, List, EllipsisLoc); | ||||||||||
4112 | } | ||||||||||
4113 | |||||||||||
4114 | namespace { | ||||||||||
4115 | |||||||||||
4116 | // Callback to only accept typo corrections that can be a valid C++ member | ||||||||||
4117 | // intializer: either a non-static field member or a base class. | ||||||||||
4118 | class MemInitializerValidatorCCC final : public CorrectionCandidateCallback { | ||||||||||
4119 | public: | ||||||||||
4120 | explicit MemInitializerValidatorCCC(CXXRecordDecl *ClassDecl) | ||||||||||
4121 | : ClassDecl(ClassDecl) {} | ||||||||||
4122 | |||||||||||
4123 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||||||
4124 | if (NamedDecl *ND = candidate.getCorrectionDecl()) { | ||||||||||
4125 | if (FieldDecl *Member = dyn_cast<FieldDecl>(ND)) | ||||||||||
4126 | return Member->getDeclContext()->getRedeclContext()->Equals(ClassDecl); | ||||||||||
4127 | return isa<TypeDecl>(ND); | ||||||||||
4128 | } | ||||||||||
4129 | return false; | ||||||||||
4130 | } | ||||||||||
4131 | |||||||||||
4132 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||||||
4133 | return std::make_unique<MemInitializerValidatorCCC>(*this); | ||||||||||
4134 | } | ||||||||||
4135 | |||||||||||
4136 | private: | ||||||||||
4137 | CXXRecordDecl *ClassDecl; | ||||||||||
4138 | }; | ||||||||||
4139 | |||||||||||
4140 | } | ||||||||||
4141 | |||||||||||
4142 | ValueDecl *Sema::tryLookupCtorInitMemberDecl(CXXRecordDecl *ClassDecl, | ||||||||||
4143 | CXXScopeSpec &SS, | ||||||||||
4144 | ParsedType TemplateTypeTy, | ||||||||||
4145 | IdentifierInfo *MemberOrBase) { | ||||||||||
4146 | if (SS.getScopeRep() || TemplateTypeTy) | ||||||||||
4147 | return nullptr; | ||||||||||
4148 | for (auto *D : ClassDecl->lookup(MemberOrBase)) | ||||||||||
4149 | if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D)) | ||||||||||
4150 | return cast<ValueDecl>(D); | ||||||||||
4151 | return nullptr; | ||||||||||
4152 | } | ||||||||||
4153 | |||||||||||
4154 | /// Handle a C++ member initializer. | ||||||||||
4155 | MemInitResult | ||||||||||
4156 | Sema::BuildMemInitializer(Decl *ConstructorD, | ||||||||||
4157 | Scope *S, | ||||||||||
4158 | CXXScopeSpec &SS, | ||||||||||
4159 | IdentifierInfo *MemberOrBase, | ||||||||||
4160 | ParsedType TemplateTypeTy, | ||||||||||
4161 | const DeclSpec &DS, | ||||||||||
4162 | SourceLocation IdLoc, | ||||||||||
4163 | Expr *Init, | ||||||||||
4164 | SourceLocation EllipsisLoc) { | ||||||||||
4165 | ExprResult Res = CorrectDelayedTyposInExpr(Init); | ||||||||||
4166 | if (!Res.isUsable()) | ||||||||||
4167 | return true; | ||||||||||
4168 | Init = Res.get(); | ||||||||||
4169 | |||||||||||
4170 | if (!ConstructorD) | ||||||||||
4171 | return true; | ||||||||||
4172 | |||||||||||
4173 | AdjustDeclIfTemplate(ConstructorD); | ||||||||||
4174 | |||||||||||
4175 | CXXConstructorDecl *Constructor | ||||||||||
4176 | = dyn_cast<CXXConstructorDecl>(ConstructorD); | ||||||||||
4177 | if (!Constructor
| ||||||||||
4178 | // The user wrote a constructor initializer on a function that is | ||||||||||
4179 | // not a C++ constructor. Ignore the error for now, because we may | ||||||||||
4180 | // have more member initializers coming; we'll diagnose it just | ||||||||||
4181 | // once in ActOnMemInitializers. | ||||||||||
4182 | return true; | ||||||||||
4183 | } | ||||||||||
4184 | |||||||||||
4185 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||||||||
4186 | |||||||||||
4187 | // C++ [class.base.init]p2: | ||||||||||
4188 | // Names in a mem-initializer-id are looked up in the scope of the | ||||||||||
4189 | // constructor's class and, if not found in that scope, are looked | ||||||||||
4190 | // up in the scope containing the constructor's definition. | ||||||||||
4191 | // [Note: if the constructor's class contains a member with the | ||||||||||
4192 | // same name as a direct or virtual base class of the class, a | ||||||||||
4193 | // mem-initializer-id naming the member or base class and composed | ||||||||||
4194 | // of a single identifier refers to the class member. A | ||||||||||
4195 | // mem-initializer-id for the hidden base class may be specified | ||||||||||
4196 | // using a qualified name. ] | ||||||||||
4197 | |||||||||||
4198 | // Look for a member, first. | ||||||||||
4199 | if (ValueDecl *Member = tryLookupCtorInitMemberDecl( | ||||||||||
4200 | ClassDecl, SS, TemplateTypeTy, MemberOrBase)) { | ||||||||||
4201 | if (EllipsisLoc.isValid()) | ||||||||||
4202 | Diag(EllipsisLoc, diag::err_pack_expansion_member_init) | ||||||||||
4203 | << MemberOrBase | ||||||||||
4204 | << SourceRange(IdLoc, Init->getSourceRange().getEnd()); | ||||||||||
4205 | |||||||||||
4206 | return BuildMemberInitializer(Member, Init, IdLoc); | ||||||||||
4207 | } | ||||||||||
4208 | // It didn't name a member, so see if it names a class. | ||||||||||
4209 | QualType BaseType; | ||||||||||
4210 | TypeSourceInfo *TInfo = nullptr; | ||||||||||
4211 | |||||||||||
4212 | if (TemplateTypeTy) { | ||||||||||
4213 | BaseType = GetTypeFromParser(TemplateTypeTy, &TInfo); | ||||||||||
4214 | if (BaseType.isNull()) | ||||||||||
4215 | return true; | ||||||||||
4216 | } else if (DS.getTypeSpecType() == TST_decltype) { | ||||||||||
4217 | BaseType = BuildDecltypeType(DS.getRepAsExpr(), DS.getTypeSpecTypeLoc()); | ||||||||||
4218 | } else if (DS.getTypeSpecType() == TST_decltype_auto) { | ||||||||||
4219 | Diag(DS.getTypeSpecTypeLoc(), diag::err_decltype_auto_invalid); | ||||||||||
4220 | return true; | ||||||||||
4221 | } else { | ||||||||||
4222 | LookupResult R(*this, MemberOrBase, IdLoc, LookupOrdinaryName); | ||||||||||
4223 | LookupParsedName(R, S, &SS); | ||||||||||
4224 | |||||||||||
4225 | TypeDecl *TyD = R.getAsSingle<TypeDecl>(); | ||||||||||
4226 | if (!TyD) { | ||||||||||
4227 | if (R.isAmbiguous()) return true; | ||||||||||
4228 | |||||||||||
4229 | // We don't want access-control diagnostics here. | ||||||||||
4230 | R.suppressDiagnostics(); | ||||||||||
4231 | |||||||||||
4232 | if (SS.isSet() && isDependentScopeSpecifier(SS)) { | ||||||||||
4233 | bool NotUnknownSpecialization = false; | ||||||||||
4234 | DeclContext *DC = computeDeclContext(SS, false); | ||||||||||
4235 | if (CXXRecordDecl *Record
| ||||||||||
4236 | NotUnknownSpecialization = !Record->hasAnyDependentBases(); | ||||||||||
4237 | |||||||||||
4238 | if (!NotUnknownSpecialization
| ||||||||||
4239 | // When the scope specifier can refer to a member of an unknown | ||||||||||
4240 | // specialization, we take it as a type name. | ||||||||||
4241 | BaseType = CheckTypenameType(ETK_None, SourceLocation(), | ||||||||||
4242 | SS.getWithLocInContext(Context), | ||||||||||
4243 | *MemberOrBase, IdLoc); | ||||||||||
4244 | if (BaseType.isNull()) | ||||||||||
4245 | return true; | ||||||||||
4246 | |||||||||||
4247 | TInfo = Context.CreateTypeSourceInfo(BaseType); | ||||||||||
4248 | DependentNameTypeLoc TL = | ||||||||||
4249 | TInfo->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||||||||
4250 | if (!TL.isNull()) { | ||||||||||
4251 | TL.setNameLoc(IdLoc); | ||||||||||
4252 | TL.setElaboratedKeywordLoc(SourceLocation()); | ||||||||||
4253 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||||||
4254 | } | ||||||||||
4255 | |||||||||||
4256 | R.clear(); | ||||||||||
4257 | R.setLookupName(MemberOrBase); | ||||||||||
4258 | } | ||||||||||
4259 | } | ||||||||||
4260 | |||||||||||
4261 | // If no results were found, try to correct typos. | ||||||||||
4262 | TypoCorrection Corr; | ||||||||||
4263 | MemInitializerValidatorCCC CCC(ClassDecl); | ||||||||||
4264 | if (R.empty() && BaseType.isNull() && | ||||||||||
4265 | (Corr = CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), S, &SS, | ||||||||||
4266 | CCC, CTK_ErrorRecovery, ClassDecl))) { | ||||||||||
4267 | if (FieldDecl *Member = Corr.getCorrectionDeclAs<FieldDecl>()) { | ||||||||||
4268 | // We have found a non-static data member with a similar | ||||||||||
4269 | // name to what was typed; complain and initialize that | ||||||||||
4270 | // member. | ||||||||||
4271 | diagnoseTypo(Corr, | ||||||||||
4272 | PDiag(diag::err_mem_init_not_member_or_class_suggest) | ||||||||||
4273 | << MemberOrBase << true); | ||||||||||
4274 | return BuildMemberInitializer(Member, Init, IdLoc); | ||||||||||
4275 | } else if (TypeDecl *Type = Corr.getCorrectionDeclAs<TypeDecl>()) { | ||||||||||
4276 | const CXXBaseSpecifier *DirectBaseSpec; | ||||||||||
4277 | const CXXBaseSpecifier *VirtualBaseSpec; | ||||||||||
4278 | if (FindBaseInitializer(*this, ClassDecl, | ||||||||||
4279 | Context.getTypeDeclType(Type), | ||||||||||
4280 | DirectBaseSpec, VirtualBaseSpec)) { | ||||||||||
4281 | // We have found a direct or virtual base class with a | ||||||||||
4282 | // similar name to what was typed; complain and initialize | ||||||||||
4283 | // that base class. | ||||||||||
4284 | diagnoseTypo(Corr, | ||||||||||
4285 | PDiag(diag::err_mem_init_not_member_or_class_suggest) | ||||||||||
4286 | << MemberOrBase << false, | ||||||||||
4287 | PDiag() /*Suppress note, we provide our own.*/); | ||||||||||
4288 | |||||||||||
4289 | const CXXBaseSpecifier *BaseSpec = DirectBaseSpec ? DirectBaseSpec | ||||||||||
4290 | : VirtualBaseSpec; | ||||||||||
4291 | Diag(BaseSpec->getBeginLoc(), diag::note_base_class_specified_here) | ||||||||||
4292 | << BaseSpec->getType() << BaseSpec->getSourceRange(); | ||||||||||
4293 | |||||||||||
4294 | TyD = Type; | ||||||||||
4295 | } | ||||||||||
4296 | } | ||||||||||
4297 | } | ||||||||||
4298 | |||||||||||
4299 | if (!TyD
| ||||||||||
4300 | Diag(IdLoc, diag::err_mem_init_not_member_or_class) | ||||||||||
4301 | << MemberOrBase << SourceRange(IdLoc,Init->getSourceRange().getEnd()); | ||||||||||
4302 | return true; | ||||||||||
4303 | } | ||||||||||
4304 | } | ||||||||||
4305 | |||||||||||
4306 | if (BaseType.isNull()) { | ||||||||||
4307 | BaseType = Context.getTypeDeclType(TyD); | ||||||||||
4308 | MarkAnyDeclReferenced(TyD->getLocation(), TyD, /*OdrUse=*/false); | ||||||||||
| |||||||||||
4309 | if (SS.isSet()) { | ||||||||||
4310 | BaseType = Context.getElaboratedType(ETK_None, SS.getScopeRep(), | ||||||||||
4311 | BaseType); | ||||||||||
4312 | TInfo = Context.CreateTypeSourceInfo(BaseType); | ||||||||||
4313 | ElaboratedTypeLoc TL = TInfo->getTypeLoc().castAs<ElaboratedTypeLoc>(); | ||||||||||
4314 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(IdLoc); | ||||||||||
4315 | TL.setElaboratedKeywordLoc(SourceLocation()); | ||||||||||
4316 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||||||
4317 | } | ||||||||||
4318 | } | ||||||||||
4319 | } | ||||||||||
4320 | |||||||||||
4321 | if (!TInfo) | ||||||||||
4322 | TInfo = Context.getTrivialTypeSourceInfo(BaseType, IdLoc); | ||||||||||
4323 | |||||||||||
4324 | return BuildBaseInitializer(BaseType, TInfo, Init, ClassDecl, EllipsisLoc); | ||||||||||
4325 | } | ||||||||||
4326 | |||||||||||
4327 | MemInitResult | ||||||||||
4328 | Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init, | ||||||||||
4329 | SourceLocation IdLoc) { | ||||||||||
4330 | FieldDecl *DirectMember = dyn_cast<FieldDecl>(Member); | ||||||||||
4331 | IndirectFieldDecl *IndirectMember = dyn_cast<IndirectFieldDecl>(Member); | ||||||||||
4332 | assert((DirectMember || IndirectMember) &&(static_cast <bool> ((DirectMember || IndirectMember) && "Member must be a FieldDecl or IndirectFieldDecl") ? void (0 ) : __assert_fail ("(DirectMember || IndirectMember) && \"Member must be a FieldDecl or IndirectFieldDecl\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 4333, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
4333 | "Member must be a FieldDecl or IndirectFieldDecl")(static_cast <bool> ((DirectMember || IndirectMember) && "Member must be a FieldDecl or IndirectFieldDecl") ? void (0 ) : __assert_fail ("(DirectMember || IndirectMember) && \"Member must be a FieldDecl or IndirectFieldDecl\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 4333, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
4334 | |||||||||||
4335 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) | ||||||||||
4336 | return true; | ||||||||||
4337 | |||||||||||
4338 | if (Member->isInvalidDecl()) | ||||||||||
4339 | return true; | ||||||||||
4340 | |||||||||||
4341 | MultiExprArg Args; | ||||||||||
4342 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||||||||
4343 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||||||||
4344 | } else if (InitListExpr *InitList = dyn_cast<InitListExpr>(Init)) { | ||||||||||
4345 | Args = MultiExprArg(InitList->getInits(), InitList->getNumInits()); | ||||||||||
4346 | } else { | ||||||||||
4347 | // Template instantiation doesn't reconstruct ParenListExprs for us. | ||||||||||
4348 | Args = Init; | ||||||||||
4349 | } | ||||||||||
4350 | |||||||||||
4351 | SourceRange InitRange = Init->getSourceRange(); | ||||||||||
4352 | |||||||||||
4353 | if (Member->getType()->isDependentType() || Init->isTypeDependent()) { | ||||||||||
4354 | // Can't check initialization for a member of dependent type or when | ||||||||||
4355 | // any of the arguments are type-dependent expressions. | ||||||||||
4356 | DiscardCleanupsInEvaluationContext(); | ||||||||||
4357 | } else { | ||||||||||
4358 | bool InitList = false; | ||||||||||
4359 | if (isa<InitListExpr>(Init)) { | ||||||||||
4360 | InitList = true; | ||||||||||
4361 | Args = Init; | ||||||||||
4362 | } | ||||||||||
4363 | |||||||||||
4364 | // Initialize the member. | ||||||||||
4365 | InitializedEntity MemberEntity = | ||||||||||
4366 | DirectMember ? InitializedEntity::InitializeMember(DirectMember, nullptr) | ||||||||||
4367 | : InitializedEntity::InitializeMember(IndirectMember, | ||||||||||
4368 | nullptr); | ||||||||||
4369 | InitializationKind Kind = | ||||||||||
4370 | InitList ? InitializationKind::CreateDirectList( | ||||||||||
4371 | IdLoc, Init->getBeginLoc(), Init->getEndLoc()) | ||||||||||
4372 | : InitializationKind::CreateDirect(IdLoc, InitRange.getBegin(), | ||||||||||
4373 | InitRange.getEnd()); | ||||||||||
4374 | |||||||||||
4375 | InitializationSequence InitSeq(*this, MemberEntity, Kind, Args); | ||||||||||
4376 | ExprResult MemberInit = InitSeq.Perform(*this, MemberEntity, Kind, Args, | ||||||||||
4377 | nullptr); | ||||||||||
4378 | if (MemberInit.isInvalid()) | ||||||||||
4379 | return true; | ||||||||||
4380 | |||||||||||
4381 | // C++11 [class.base.init]p7: | ||||||||||
4382 | // The initialization of each base and member constitutes a | ||||||||||
4383 | // full-expression. | ||||||||||
4384 | MemberInit = ActOnFinishFullExpr(MemberInit.get(), InitRange.getBegin(), | ||||||||||
4385 | /*DiscardedValue*/ false); | ||||||||||
4386 | if (MemberInit.isInvalid()) | ||||||||||
4387 | return true; | ||||||||||
4388 | |||||||||||
4389 | Init = MemberInit.get(); | ||||||||||
4390 | } | ||||||||||
4391 | |||||||||||
4392 | if (DirectMember) { | ||||||||||
4393 | return new (Context) CXXCtorInitializer(Context, DirectMember, IdLoc, | ||||||||||
4394 | InitRange.getBegin(), Init, | ||||||||||
4395 | InitRange.getEnd()); | ||||||||||
4396 | } else { | ||||||||||
4397 | return new (Context) CXXCtorInitializer(Context, IndirectMember, IdLoc, | ||||||||||
4398 | InitRange.getBegin(), Init, | ||||||||||
4399 | InitRange.getEnd()); | ||||||||||
4400 | } | ||||||||||
4401 | } | ||||||||||
4402 | |||||||||||
4403 | MemInitResult | ||||||||||
4404 | Sema::BuildDelegatingInitializer(TypeSourceInfo *TInfo, Expr *Init, | ||||||||||
4405 | CXXRecordDecl *ClassDecl) { | ||||||||||
4406 | SourceLocation NameLoc = TInfo->getTypeLoc().getLocalSourceRange().getBegin(); | ||||||||||
4407 | if (!LangOpts.CPlusPlus11) | ||||||||||
4408 | return Diag(NameLoc, diag::err_delegating_ctor) | ||||||||||
4409 | << TInfo->getTypeLoc().getLocalSourceRange(); | ||||||||||
4410 | Diag(NameLoc, diag::warn_cxx98_compat_delegating_ctor); | ||||||||||
4411 | |||||||||||
4412 | bool InitList = true; | ||||||||||
4413 | MultiExprArg Args = Init; | ||||||||||
4414 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||||||||
4415 | InitList = false; | ||||||||||
4416 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||||||||
4417 | } | ||||||||||
4418 | |||||||||||
4419 | SourceRange InitRange = Init->getSourceRange(); | ||||||||||
4420 | // Initialize the object. | ||||||||||
4421 | InitializedEntity DelegationEntity = InitializedEntity::InitializeDelegation( | ||||||||||
4422 | QualType(ClassDecl->getTypeForDecl(), 0)); | ||||||||||
4423 | InitializationKind Kind = | ||||||||||
4424 | InitList ? InitializationKind::CreateDirectList( | ||||||||||
4425 | NameLoc, Init->getBeginLoc(), Init->getEndLoc()) | ||||||||||
4426 | : InitializationKind::CreateDirect(NameLoc, InitRange.getBegin(), | ||||||||||
4427 | InitRange.getEnd()); | ||||||||||
4428 | InitializationSequence InitSeq(*this, DelegationEntity, Kind, Args); | ||||||||||
4429 | ExprResult DelegationInit = InitSeq.Perform(*this, DelegationEntity, Kind, | ||||||||||
4430 | Args, nullptr); | ||||||||||
4431 | if (DelegationInit.isInvalid()) | ||||||||||
4432 | return true; | ||||||||||
4433 | |||||||||||
4434 | assert(cast<CXXConstructExpr>(DelegationInit.get())->getConstructor() &&(static_cast <bool> (cast<CXXConstructExpr>(DelegationInit .get())->getConstructor() && "Delegating constructor with no target?" ) ? void (0) : __assert_fail ("cast<CXXConstructExpr>(DelegationInit.get())->getConstructor() && \"Delegating constructor with no target?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 4435, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
4435 | "Delegating constructor with no target?")(static_cast <bool> (cast<CXXConstructExpr>(DelegationInit .get())->getConstructor() && "Delegating constructor with no target?" ) ? void (0) : __assert_fail ("cast<CXXConstructExpr>(DelegationInit.get())->getConstructor() && \"Delegating constructor with no target?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 4435, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
4436 | |||||||||||
4437 | // C++11 [class.base.init]p7: | ||||||||||
4438 | // The initialization of each base and member constitutes a | ||||||||||
4439 | // full-expression. | ||||||||||
4440 | DelegationInit = ActOnFinishFullExpr( | ||||||||||
4441 | DelegationInit.get(), InitRange.getBegin(), /*DiscardedValue*/ false); | ||||||||||
4442 | if (DelegationInit.isInvalid()) | ||||||||||
4443 | return true; | ||||||||||
4444 | |||||||||||
4445 | // If we are in a dependent context, template instantiation will | ||||||||||
4446 | // perform this type-checking again. Just save the arguments that we | ||||||||||
4447 | // received in a ParenListExpr. | ||||||||||
4448 | // FIXME: This isn't quite ideal, since our ASTs don't capture all | ||||||||||
4449 | // of the information that we have about the base | ||||||||||
4450 | // initializer. However, deconstructing the ASTs is a dicey process, | ||||||||||
4451 | // and this approach is far more likely to get the corner cases right. | ||||||||||
4452 | if (CurContext->isDependentContext()) | ||||||||||
4453 | DelegationInit = Init; | ||||||||||
4454 | |||||||||||
4455 | return new (Context) CXXCtorInitializer(Context, TInfo, InitRange.getBegin(), | ||||||||||
4456 | DelegationInit.getAs<Expr>(), | ||||||||||
4457 | InitRange.getEnd()); | ||||||||||
4458 | } | ||||||||||
4459 | |||||||||||
4460 | MemInitResult | ||||||||||
4461 | Sema::BuildBaseInitializer(QualType BaseType, TypeSourceInfo *BaseTInfo, | ||||||||||
4462 | Expr *Init, CXXRecordDecl *ClassDecl, | ||||||||||
4463 | SourceLocation EllipsisLoc) { | ||||||||||
4464 | SourceLocation BaseLoc | ||||||||||
4465 | = BaseTInfo->getTypeLoc().getLocalSourceRange().getBegin(); | ||||||||||
4466 | |||||||||||
4467 | if (!BaseType->isDependentType() && !BaseType->isRecordType()) | ||||||||||
4468 | return Diag(BaseLoc, diag::err_base_init_does_not_name_class) | ||||||||||
4469 | << BaseType << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||||||||
4470 | |||||||||||
4471 | // C++ [class.base.init]p2: | ||||||||||
4472 | // [...] Unless the mem-initializer-id names a nonstatic data | ||||||||||
4473 | // member of the constructor's class or a direct or virtual base | ||||||||||
4474 | // of that class, the mem-initializer is ill-formed. A | ||||||||||
4475 | // mem-initializer-list can initialize a base class using any | ||||||||||
4476 | // name that denotes that base class type. | ||||||||||
4477 | bool Dependent = BaseType->isDependentType() || Init->isTypeDependent(); | ||||||||||
4478 | |||||||||||
4479 | SourceRange InitRange = Init->getSourceRange(); | ||||||||||
4480 | if (EllipsisLoc.isValid()) { | ||||||||||
4481 | // This is a pack expansion. | ||||||||||
4482 | if (!BaseType->containsUnexpandedParameterPack()) { | ||||||||||
4483 | Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | ||||||||||
4484 | << SourceRange(BaseLoc, InitRange.getEnd()); | ||||||||||
4485 | |||||||||||
4486 | EllipsisLoc = SourceLocation(); | ||||||||||
4487 | } | ||||||||||
4488 | } else { | ||||||||||
4489 | // Check for any unexpanded parameter packs. | ||||||||||
4490 | if (DiagnoseUnexpandedParameterPack(BaseLoc, BaseTInfo, UPPC_Initializer)) | ||||||||||
4491 | return true; | ||||||||||
4492 | |||||||||||
4493 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) | ||||||||||
4494 | return true; | ||||||||||
4495 | } | ||||||||||
4496 | |||||||||||
4497 | // Check for direct and virtual base classes. | ||||||||||
4498 | const CXXBaseSpecifier *DirectBaseSpec = nullptr; | ||||||||||
4499 | const CXXBaseSpecifier *VirtualBaseSpec = nullptr; | ||||||||||
4500 | if (!Dependent) { | ||||||||||
4501 | if (Context.hasSameUnqualifiedType(QualType(ClassDecl->getTypeForDecl(),0), | ||||||||||
4502 | BaseType)) | ||||||||||
4503 | return BuildDelegatingInitializer(BaseTInfo, Init, ClassDecl); | ||||||||||
4504 | |||||||||||
4505 | FindBaseInitializer(*this, ClassDecl, BaseType, DirectBaseSpec, | ||||||||||
4506 | VirtualBaseSpec); | ||||||||||
4507 | |||||||||||
4508 | // C++ [base.class.init]p2: | ||||||||||
4509 | // Unless the mem-initializer-id names a nonstatic data member of the | ||||||||||
4510 | // constructor's class or a direct or virtual base of that class, the | ||||||||||
4511 | // mem-initializer is ill-formed. | ||||||||||
4512 | if (!DirectBaseSpec && !VirtualBaseSpec) { | ||||||||||
4513 | // If the class has any dependent bases, then it's possible that | ||||||||||
4514 | // one of those types will resolve to the same type as | ||||||||||
4515 | // BaseType. Therefore, just treat this as a dependent base | ||||||||||
4516 | // class initialization. FIXME: Should we try to check the | ||||||||||
4517 | // initialization anyway? It seems odd. | ||||||||||
4518 | if (ClassDecl->hasAnyDependentBases()) | ||||||||||
4519 | Dependent = true; | ||||||||||
4520 | else | ||||||||||
4521 | return Diag(BaseLoc, diag::err_not_direct_base_or_virtual) | ||||||||||
4522 | << BaseType << Context.getTypeDeclType(ClassDecl) | ||||||||||
4523 | << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||||||||
4524 | } | ||||||||||
4525 | } | ||||||||||
4526 | |||||||||||
4527 | if (Dependent) { | ||||||||||
4528 | DiscardCleanupsInEvaluationContext(); | ||||||||||
4529 | |||||||||||
4530 | return new (Context) CXXCtorInitializer(Context, BaseTInfo, | ||||||||||
4531 | /*IsVirtual=*/false, | ||||||||||
4532 | InitRange.getBegin(), Init, | ||||||||||
4533 | InitRange.getEnd(), EllipsisLoc); | ||||||||||
4534 | } | ||||||||||
4535 | |||||||||||
4536 | // C++ [base.class.init]p2: | ||||||||||
4537 | // If a mem-initializer-id is ambiguous because it designates both | ||||||||||
4538 | // a direct non-virtual base class and an inherited virtual base | ||||||||||
4539 | // class, the mem-initializer is ill-formed. | ||||||||||
4540 | if (DirectBaseSpec && VirtualBaseSpec) | ||||||||||
4541 | return Diag(BaseLoc, diag::err_base_init_direct_and_virtual) | ||||||||||
4542 | << BaseType << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||||||||
4543 | |||||||||||
4544 | const CXXBaseSpecifier *BaseSpec = DirectBaseSpec; | ||||||||||
4545 | if (!BaseSpec) | ||||||||||
4546 | BaseSpec = VirtualBaseSpec; | ||||||||||
4547 | |||||||||||
4548 | // Initialize the base. | ||||||||||
4549 | bool InitList = true; | ||||||||||
4550 | MultiExprArg Args = Init; | ||||||||||
4551 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||||||||
4552 | InitList = false; | ||||||||||
4553 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||||||||
4554 | } | ||||||||||
4555 | |||||||||||
4556 | InitializedEntity BaseEntity = | ||||||||||
4557 | InitializedEntity::InitializeBase(Context, BaseSpec, VirtualBaseSpec); | ||||||||||
4558 | InitializationKind Kind = | ||||||||||
4559 | InitList ? InitializationKind::CreateDirectList(BaseLoc) | ||||||||||
4560 | : InitializationKind::CreateDirect(BaseLoc, InitRange.getBegin(), | ||||||||||
4561 | InitRange.getEnd()); | ||||||||||
4562 | InitializationSequence InitSeq(*this, BaseEntity, Kind, Args); | ||||||||||
4563 | ExprResult BaseInit = InitSeq.Perform(*this, BaseEntity, Kind, Args, nullptr); | ||||||||||
4564 | if (BaseInit.isInvalid()) | ||||||||||
4565 | return true; | ||||||||||
4566 | |||||||||||
4567 | // C++11 [class.base.init]p7: | ||||||||||
4568 | // The initialization of each base and member constitutes a | ||||||||||
4569 | // full-expression. | ||||||||||
4570 | BaseInit = ActOnFinishFullExpr(BaseInit.get(), InitRange.getBegin(), | ||||||||||
4571 | /*DiscardedValue*/ false); | ||||||||||
4572 | if (BaseInit.isInvalid()) | ||||||||||
4573 | return true; | ||||||||||
4574 | |||||||||||
4575 | // If we are in a dependent context, template instantiation will | ||||||||||
4576 | // perform this type-checking again. Just save the arguments that we | ||||||||||
4577 | // received in a ParenListExpr. | ||||||||||
4578 | // FIXME: This isn't quite ideal, since our ASTs don't capture all | ||||||||||
4579 | // of the information that we have about the base | ||||||||||
4580 | // initializer. However, deconstructing the ASTs is a dicey process, | ||||||||||
4581 | // and this approach is far more likely to get the corner cases right. | ||||||||||
4582 | if (CurContext->isDependentContext()) | ||||||||||
4583 | BaseInit = Init; | ||||||||||
4584 | |||||||||||
4585 | return new (Context) CXXCtorInitializer(Context, BaseTInfo, | ||||||||||
4586 | BaseSpec->isVirtual(), | ||||||||||
4587 | InitRange.getBegin(), | ||||||||||
4588 | BaseInit.getAs<Expr>(), | ||||||||||
4589 | InitRange.getEnd(), EllipsisLoc); | ||||||||||
4590 | } | ||||||||||
4591 | |||||||||||
4592 | // Create a static_cast\<T&&>(expr). | ||||||||||
4593 | static Expr *CastForMoving(Sema &SemaRef, Expr *E, QualType T = QualType()) { | ||||||||||
4594 | if (T.isNull()) T = E->getType(); | ||||||||||
4595 | QualType TargetType = SemaRef.BuildReferenceType( | ||||||||||
4596 | T, /*SpelledAsLValue*/false, SourceLocation(), DeclarationName()); | ||||||||||
4597 | SourceLocation ExprLoc = E->getBeginLoc(); | ||||||||||
4598 | TypeSourceInfo *TargetLoc = SemaRef.Context.getTrivialTypeSourceInfo( | ||||||||||
4599 | TargetType, ExprLoc); | ||||||||||
4600 | |||||||||||
4601 | return SemaRef.BuildCXXNamedCast(ExprLoc, tok::kw_static_cast, TargetLoc, E, | ||||||||||
4602 | SourceRange(ExprLoc, ExprLoc), | ||||||||||
4603 | E->getSourceRange()).get(); | ||||||||||
4604 | } | ||||||||||
4605 | |||||||||||
4606 | /// ImplicitInitializerKind - How an implicit base or member initializer should | ||||||||||
4607 | /// initialize its base or member. | ||||||||||
4608 | enum ImplicitInitializerKind { | ||||||||||
4609 | IIK_Default, | ||||||||||
4610 | IIK_Copy, | ||||||||||
4611 | IIK_Move, | ||||||||||
4612 | IIK_Inherit | ||||||||||
4613 | }; | ||||||||||
4614 | |||||||||||
4615 | static bool | ||||||||||
4616 | BuildImplicitBaseInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor, | ||||||||||
4617 | ImplicitInitializerKind ImplicitInitKind, | ||||||||||
4618 | CXXBaseSpecifier *BaseSpec, | ||||||||||
4619 | bool IsInheritedVirtualBase, | ||||||||||
4620 | CXXCtorInitializer *&CXXBaseInit) { | ||||||||||
4621 | InitializedEntity InitEntity | ||||||||||
4622 | = InitializedEntity::InitializeBase(SemaRef.Context, BaseSpec, | ||||||||||
4623 | IsInheritedVirtualBase); | ||||||||||
4624 | |||||||||||
4625 | ExprResult BaseInit; | ||||||||||
4626 | |||||||||||
4627 | switch (ImplicitInitKind) { | ||||||||||
4628 | case IIK_Inherit: | ||||||||||
4629 | case IIK_Default: { | ||||||||||
4630 | InitializationKind InitKind | ||||||||||
4631 | = InitializationKind::CreateDefault(Constructor->getLocation()); | ||||||||||
4632 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, None); | ||||||||||
4633 | BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, None); | ||||||||||
4634 | break; | ||||||||||
4635 | } | ||||||||||
4636 | |||||||||||
4637 | case IIK_Move: | ||||||||||
4638 | case IIK_Copy: { | ||||||||||
4639 | bool Moving = ImplicitInitKind == IIK_Move; | ||||||||||
4640 | ParmVarDecl *Param = Constructor->getParamDecl(0); | ||||||||||
4641 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||||||||
4642 | |||||||||||
4643 | Expr *CopyCtorArg = | ||||||||||
4644 | DeclRefExpr::Create(SemaRef.Context, NestedNameSpecifierLoc(), | ||||||||||
4645 | SourceLocation(), Param, false, | ||||||||||
4646 | Constructor->getLocation(), ParamType, | ||||||||||
4647 | VK_LValue, nullptr); | ||||||||||
4648 | |||||||||||
4649 | SemaRef.MarkDeclRefReferenced(cast<DeclRefExpr>(CopyCtorArg)); | ||||||||||
4650 | |||||||||||
4651 | // Cast to the base class to avoid ambiguities. | ||||||||||
4652 | QualType ArgTy = | ||||||||||
4653 | SemaRef.Context.getQualifiedType(BaseSpec->getType().getUnqualifiedType(), | ||||||||||
4654 | ParamType.getQualifiers()); | ||||||||||
4655 | |||||||||||
4656 | if (Moving) { | ||||||||||
4657 | CopyCtorArg = CastForMoving(SemaRef, CopyCtorArg); | ||||||||||
4658 | } | ||||||||||
4659 | |||||||||||
4660 | CXXCastPath BasePath; | ||||||||||
4661 | BasePath.push_back(BaseSpec); | ||||||||||
4662 | CopyCtorArg = SemaRef.ImpCastExprToType(CopyCtorArg, ArgTy, | ||||||||||
4663 | CK_UncheckedDerivedToBase, | ||||||||||
4664 | Moving ? VK_XValue : VK_LValue, | ||||||||||
4665 | &BasePath).get(); | ||||||||||
4666 | |||||||||||
4667 | InitializationKind InitKind | ||||||||||
4668 | = InitializationKind::CreateDirect(Constructor->getLocation(), | ||||||||||
4669 | SourceLocation(), SourceLocation()); | ||||||||||
4670 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, CopyCtorArg); | ||||||||||
4671 | BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, CopyCtorArg); | ||||||||||
4672 | break; | ||||||||||
4673 | } | ||||||||||
4674 | } | ||||||||||
4675 | |||||||||||
4676 | BaseInit = SemaRef.MaybeCreateExprWithCleanups(BaseInit); | ||||||||||
4677 | if (BaseInit.isInvalid()) | ||||||||||
4678 | return true; | ||||||||||
4679 | |||||||||||
4680 | CXXBaseInit = | ||||||||||
4681 | new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||||||||
4682 | SemaRef.Context.getTrivialTypeSourceInfo(BaseSpec->getType(), | ||||||||||
4683 | SourceLocation()), | ||||||||||
4684 | BaseSpec->isVirtual(), | ||||||||||
4685 | SourceLocation(), | ||||||||||
4686 | BaseInit.getAs<Expr>(), | ||||||||||
4687 | SourceLocation(), | ||||||||||
4688 | SourceLocation()); | ||||||||||
4689 | |||||||||||
4690 | return false; | ||||||||||
4691 | } | ||||||||||
4692 | |||||||||||
4693 | static bool RefersToRValueRef(Expr *MemRef) { | ||||||||||
4694 | ValueDecl *Referenced = cast<MemberExpr>(MemRef)->getMemberDecl(); | ||||||||||
4695 | return Referenced->getType()->isRValueReferenceType(); | ||||||||||
4696 | } | ||||||||||
4697 | |||||||||||
4698 | static bool | ||||||||||
4699 | BuildImplicitMemberInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor, | ||||||||||
4700 | ImplicitInitializerKind ImplicitInitKind, | ||||||||||
4701 | FieldDecl *Field, IndirectFieldDecl *Indirect, | ||||||||||
4702 | CXXCtorInitializer *&CXXMemberInit) { | ||||||||||
4703 | if (Field->isInvalidDecl()) | ||||||||||
4704 | return true; | ||||||||||
4705 | |||||||||||
4706 | SourceLocation Loc = Constructor->getLocation(); | ||||||||||
4707 | |||||||||||
4708 | if (ImplicitInitKind == IIK_Copy || ImplicitInitKind == IIK_Move) { | ||||||||||
4709 | bool Moving = ImplicitInitKind == IIK_Move; | ||||||||||
4710 | ParmVarDecl *Param = Constructor->getParamDecl(0); | ||||||||||
4711 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||||||||
4712 | |||||||||||
4713 | // Suppress copying zero-width bitfields. | ||||||||||
4714 | if (Field->isZeroLengthBitField(SemaRef.Context)) | ||||||||||
4715 | return false; | ||||||||||
4716 | |||||||||||
4717 | Expr *MemberExprBase = | ||||||||||
4718 | DeclRefExpr::Create(SemaRef.Context, NestedNameSpecifierLoc(), | ||||||||||
4719 | SourceLocation(), Param, false, | ||||||||||
4720 | Loc, ParamType, VK_LValue, nullptr); | ||||||||||
4721 | |||||||||||
4722 | SemaRef.MarkDeclRefReferenced(cast<DeclRefExpr>(MemberExprBase)); | ||||||||||
4723 | |||||||||||
4724 | if (Moving) { | ||||||||||
4725 | MemberExprBase = CastForMoving(SemaRef, MemberExprBase); | ||||||||||
4726 | } | ||||||||||
4727 | |||||||||||
4728 | // Build a reference to this field within the parameter. | ||||||||||
4729 | CXXScopeSpec SS; | ||||||||||
4730 | LookupResult MemberLookup(SemaRef, Field->getDeclName(), Loc, | ||||||||||
4731 | Sema::LookupMemberName); | ||||||||||
4732 | MemberLookup.addDecl(Indirect ? cast<ValueDecl>(Indirect) | ||||||||||
4733 | : cast<ValueDecl>(Field), AS_public); | ||||||||||
4734 | MemberLookup.resolveKind(); | ||||||||||
4735 | ExprResult CtorArg | ||||||||||
4736 | = SemaRef.BuildMemberReferenceExpr(MemberExprBase, | ||||||||||
4737 | ParamType, Loc, | ||||||||||
4738 | /*IsArrow=*/false, | ||||||||||
4739 | SS, | ||||||||||
4740 | /*TemplateKWLoc=*/SourceLocation(), | ||||||||||
4741 | /*FirstQualifierInScope=*/nullptr, | ||||||||||
4742 | MemberLookup, | ||||||||||
4743 | /*TemplateArgs=*/nullptr, | ||||||||||
4744 | /*S*/nullptr); | ||||||||||
4745 | if (CtorArg.isInvalid()) | ||||||||||
4746 | return true; | ||||||||||
4747 | |||||||||||
4748 | // C++11 [class.copy]p15: | ||||||||||
4749 | // - if a member m has rvalue reference type T&&, it is direct-initialized | ||||||||||
4750 | // with static_cast<T&&>(x.m); | ||||||||||
4751 | if (RefersToRValueRef(CtorArg.get())) { | ||||||||||
4752 | CtorArg = CastForMoving(SemaRef, CtorArg.get()); | ||||||||||
4753 | } | ||||||||||
4754 | |||||||||||
4755 | InitializedEntity Entity = | ||||||||||
4756 | Indirect ? InitializedEntity::InitializeMember(Indirect, nullptr, | ||||||||||
4757 | /*Implicit*/ true) | ||||||||||
4758 | : InitializedEntity::InitializeMember(Field, nullptr, | ||||||||||
4759 | /*Implicit*/ true); | ||||||||||
4760 | |||||||||||
4761 | // Direct-initialize to use the copy constructor. | ||||||||||
4762 | InitializationKind InitKind = | ||||||||||
4763 | InitializationKind::CreateDirect(Loc, SourceLocation(), SourceLocation()); | ||||||||||
4764 | |||||||||||
4765 | Expr *CtorArgE = CtorArg.getAs<Expr>(); | ||||||||||
4766 | InitializationSequence InitSeq(SemaRef, Entity, InitKind, CtorArgE); | ||||||||||
4767 | ExprResult MemberInit = | ||||||||||
4768 | InitSeq.Perform(SemaRef, Entity, InitKind, MultiExprArg(&CtorArgE, 1)); | ||||||||||
4769 | MemberInit = SemaRef.MaybeCreateExprWithCleanups(MemberInit); | ||||||||||
4770 | if (MemberInit.isInvalid()) | ||||||||||
4771 | return true; | ||||||||||
4772 | |||||||||||
4773 | if (Indirect) | ||||||||||
4774 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer( | ||||||||||
4775 | SemaRef.Context, Indirect, Loc, Loc, MemberInit.getAs<Expr>(), Loc); | ||||||||||
4776 | else | ||||||||||
4777 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer( | ||||||||||
4778 | SemaRef.Context, Field, Loc, Loc, MemberInit.getAs<Expr>(), Loc); | ||||||||||
4779 | return false; | ||||||||||
4780 | } | ||||||||||
4781 | |||||||||||
4782 | assert((ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) &&(static_cast <bool> ((ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) && "Unhandled implicit init kind!" ) ? void (0) : __assert_fail ("(ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) && \"Unhandled implicit init kind!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 4783, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
4783 | "Unhandled implicit init kind!")(static_cast <bool> ((ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) && "Unhandled implicit init kind!" ) ? void (0) : __assert_fail ("(ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) && \"Unhandled implicit init kind!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 4783, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
4784 | |||||||||||
4785 | QualType FieldBaseElementType = | ||||||||||
4786 | SemaRef.Context.getBaseElementType(Field->getType()); | ||||||||||
4787 | |||||||||||
4788 | if (FieldBaseElementType->isRecordType()) { | ||||||||||
4789 | InitializedEntity InitEntity = | ||||||||||
4790 | Indirect ? InitializedEntity::InitializeMember(Indirect, nullptr, | ||||||||||
4791 | /*Implicit*/ true) | ||||||||||
4792 | : InitializedEntity::InitializeMember(Field, nullptr, | ||||||||||
4793 | /*Implicit*/ true); | ||||||||||
4794 | InitializationKind InitKind = | ||||||||||
4795 | InitializationKind::CreateDefault(Loc); | ||||||||||
4796 | |||||||||||
4797 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, None); | ||||||||||
4798 | ExprResult MemberInit = | ||||||||||
4799 | InitSeq.Perform(SemaRef, InitEntity, InitKind, None); | ||||||||||
4800 | |||||||||||
4801 | MemberInit = SemaRef.MaybeCreateExprWithCleanups(MemberInit); | ||||||||||
4802 | if (MemberInit.isInvalid()) | ||||||||||
4803 | return true; | ||||||||||
4804 | |||||||||||
4805 | if (Indirect) | ||||||||||
4806 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||||||||
4807 | Indirect, Loc, | ||||||||||
4808 | Loc, | ||||||||||
4809 | MemberInit.get(), | ||||||||||
4810 | Loc); | ||||||||||
4811 | else | ||||||||||
4812 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||||||||
4813 | Field, Loc, Loc, | ||||||||||
4814 | MemberInit.get(), | ||||||||||
4815 | Loc); | ||||||||||
4816 | return false; | ||||||||||
4817 | } | ||||||||||
4818 | |||||||||||
4819 | if (!Field->getParent()->isUnion()) { | ||||||||||
4820 | if (FieldBaseElementType->isReferenceType()) { | ||||||||||
4821 | SemaRef.Diag(Constructor->getLocation(), | ||||||||||
4822 | diag::err_uninitialized_member_in_ctor) | ||||||||||
4823 | << (int)Constructor->isImplicit() | ||||||||||
4824 | << SemaRef.Context.getTagDeclType(Constructor->getParent()) | ||||||||||
4825 | << 0 << Field->getDeclName(); | ||||||||||
4826 | SemaRef.Diag(Field->getLocation(), diag::note_declared_at); | ||||||||||
4827 | return true; | ||||||||||
4828 | } | ||||||||||
4829 | |||||||||||
4830 | if (FieldBaseElementType.isConstQualified()) { | ||||||||||
4831 | SemaRef.Diag(Constructor->getLocation(), | ||||||||||
4832 | diag::err_uninitialized_member_in_ctor) | ||||||||||
4833 | << (int)Constructor->isImplicit() | ||||||||||
4834 | << SemaRef.Context.getTagDeclType(Constructor->getParent()) | ||||||||||
4835 | << 1 << Field->getDeclName(); | ||||||||||
4836 | SemaRef.Diag(Field->getLocation(), diag::note_declared_at); | ||||||||||
4837 | return true; | ||||||||||
4838 | } | ||||||||||
4839 | } | ||||||||||
4840 | |||||||||||
4841 | if (FieldBaseElementType.hasNonTrivialObjCLifetime()) { | ||||||||||
4842 | // ARC and Weak: | ||||||||||
4843 | // Default-initialize Objective-C pointers to NULL. | ||||||||||
4844 | CXXMemberInit | ||||||||||
4845 | = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, Field, | ||||||||||
4846 | Loc, Loc, | ||||||||||
4847 | new (SemaRef.Context) ImplicitValueInitExpr(Field->getType()), | ||||||||||
4848 | Loc); | ||||||||||
4849 | return false; | ||||||||||
4850 | } | ||||||||||
4851 | |||||||||||
4852 | // Nothing to initialize. | ||||||||||
4853 | CXXMemberInit = nullptr; | ||||||||||
4854 | return false; | ||||||||||
4855 | } | ||||||||||
4856 | |||||||||||
4857 | namespace { | ||||||||||
4858 | struct BaseAndFieldInfo { | ||||||||||
4859 | Sema &S; | ||||||||||
4860 | CXXConstructorDecl *Ctor; | ||||||||||
4861 | bool AnyErrorsInInits; | ||||||||||
4862 | ImplicitInitializerKind IIK; | ||||||||||
4863 | llvm::DenseMap<const void *, CXXCtorInitializer*> AllBaseFields; | ||||||||||
4864 | SmallVector<CXXCtorInitializer*, 8> AllToInit; | ||||||||||
4865 | llvm::DenseMap<TagDecl*, FieldDecl*> ActiveUnionMember; | ||||||||||
4866 | |||||||||||
4867 | BaseAndFieldInfo(Sema &S, CXXConstructorDecl *Ctor, bool ErrorsInInits) | ||||||||||
4868 | : S(S), Ctor(Ctor), AnyErrorsInInits(ErrorsInInits) { | ||||||||||
4869 | bool Generated = Ctor->isImplicit() || Ctor->isDefaulted(); | ||||||||||
4870 | if (Ctor->getInheritedConstructor()) | ||||||||||
4871 | IIK = IIK_Inherit; | ||||||||||
4872 | else if (Generated && Ctor->isCopyConstructor()) | ||||||||||
4873 | IIK = IIK_Copy; | ||||||||||
4874 | else if (Generated && Ctor->isMoveConstructor()) | ||||||||||
4875 | IIK = IIK_Move; | ||||||||||
4876 | else | ||||||||||
4877 | IIK = IIK_Default; | ||||||||||
4878 | } | ||||||||||
4879 | |||||||||||
4880 | bool isImplicitCopyOrMove() const { | ||||||||||
4881 | switch (IIK) { | ||||||||||
4882 | case IIK_Copy: | ||||||||||
4883 | case IIK_Move: | ||||||||||
4884 | return true; | ||||||||||
4885 | |||||||||||
4886 | case IIK_Default: | ||||||||||
4887 | case IIK_Inherit: | ||||||||||
4888 | return false; | ||||||||||
4889 | } | ||||||||||
4890 | |||||||||||
4891 | llvm_unreachable("Invalid ImplicitInitializerKind!")::llvm::llvm_unreachable_internal("Invalid ImplicitInitializerKind!" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 4891); | ||||||||||
4892 | } | ||||||||||
4893 | |||||||||||
4894 | bool addFieldInitializer(CXXCtorInitializer *Init) { | ||||||||||
4895 | AllToInit.push_back(Init); | ||||||||||
4896 | |||||||||||
4897 | // Check whether this initializer makes the field "used". | ||||||||||
4898 | if (Init->getInit()->HasSideEffects(S.Context)) | ||||||||||
4899 | S.UnusedPrivateFields.remove(Init->getAnyMember()); | ||||||||||
4900 | |||||||||||
4901 | return false; | ||||||||||
4902 | } | ||||||||||
4903 | |||||||||||
4904 | bool isInactiveUnionMember(FieldDecl *Field) { | ||||||||||
4905 | RecordDecl *Record = Field->getParent(); | ||||||||||
4906 | if (!Record->isUnion()) | ||||||||||
4907 | return false; | ||||||||||
4908 | |||||||||||
4909 | if (FieldDecl *Active = | ||||||||||
4910 | ActiveUnionMember.lookup(Record->getCanonicalDecl())) | ||||||||||
4911 | return Active != Field->getCanonicalDecl(); | ||||||||||
4912 | |||||||||||
4913 | // In an implicit copy or move constructor, ignore any in-class initializer. | ||||||||||
4914 | if (isImplicitCopyOrMove()) | ||||||||||
4915 | return true; | ||||||||||
4916 | |||||||||||
4917 | // If there's no explicit initialization, the field is active only if it | ||||||||||
4918 | // has an in-class initializer... | ||||||||||
4919 | if (Field->hasInClassInitializer()) | ||||||||||
4920 | return false; | ||||||||||
4921 | // ... or it's an anonymous struct or union whose class has an in-class | ||||||||||
4922 | // initializer. | ||||||||||
4923 | if (!Field->isAnonymousStructOrUnion()) | ||||||||||
4924 | return true; | ||||||||||
4925 | CXXRecordDecl *FieldRD = Field->getType()->getAsCXXRecordDecl(); | ||||||||||
4926 | return !FieldRD->hasInClassInitializer(); | ||||||||||
4927 | } | ||||||||||
4928 | |||||||||||
4929 | /// Determine whether the given field is, or is within, a union member | ||||||||||
4930 | /// that is inactive (because there was an initializer given for a different | ||||||||||
4931 | /// member of the union, or because the union was not initialized at all). | ||||||||||
4932 | bool isWithinInactiveUnionMember(FieldDecl *Field, | ||||||||||
4933 | IndirectFieldDecl *Indirect) { | ||||||||||
4934 | if (!Indirect) | ||||||||||
4935 | return isInactiveUnionMember(Field); | ||||||||||
4936 | |||||||||||
4937 | for (auto *C : Indirect->chain()) { | ||||||||||
4938 | FieldDecl *Field = dyn_cast<FieldDecl>(C); | ||||||||||
4939 | if (Field && isInactiveUnionMember(Field)) | ||||||||||
4940 | return true; | ||||||||||
4941 | } | ||||||||||
4942 | return false; | ||||||||||
4943 | } | ||||||||||
4944 | }; | ||||||||||
4945 | } | ||||||||||
4946 | |||||||||||
4947 | /// Determine whether the given type is an incomplete or zero-lenfgth | ||||||||||
4948 | /// array type. | ||||||||||
4949 | static bool isIncompleteOrZeroLengthArrayType(ASTContext &Context, QualType T) { | ||||||||||
4950 | if (T->isIncompleteArrayType()) | ||||||||||
4951 | return true; | ||||||||||
4952 | |||||||||||
4953 | while (const ConstantArrayType *ArrayT = Context.getAsConstantArrayType(T)) { | ||||||||||
4954 | if (!ArrayT->getSize()) | ||||||||||
4955 | return true; | ||||||||||
4956 | |||||||||||
4957 | T = ArrayT->getElementType(); | ||||||||||
4958 | } | ||||||||||
4959 | |||||||||||
4960 | return false; | ||||||||||
4961 | } | ||||||||||
4962 | |||||||||||
4963 | static bool CollectFieldInitializer(Sema &SemaRef, BaseAndFieldInfo &Info, | ||||||||||
4964 | FieldDecl *Field, | ||||||||||
4965 | IndirectFieldDecl *Indirect = nullptr) { | ||||||||||
4966 | if (Field->isInvalidDecl()) | ||||||||||
4967 | return false; | ||||||||||
4968 | |||||||||||
4969 | // Overwhelmingly common case: we have a direct initializer for this field. | ||||||||||
4970 | if (CXXCtorInitializer *Init = | ||||||||||
4971 | Info.AllBaseFields.lookup(Field->getCanonicalDecl())) | ||||||||||
4972 | return Info.addFieldInitializer(Init); | ||||||||||
4973 | |||||||||||
4974 | // C++11 [class.base.init]p8: | ||||||||||
4975 | // if the entity is a non-static data member that has a | ||||||||||
4976 | // brace-or-equal-initializer and either | ||||||||||
4977 | // -- the constructor's class is a union and no other variant member of that | ||||||||||
4978 | // union is designated by a mem-initializer-id or | ||||||||||
4979 | // -- the constructor's class is not a union, and, if the entity is a member | ||||||||||
4980 | // of an anonymous union, no other member of that union is designated by | ||||||||||
4981 | // a mem-initializer-id, | ||||||||||
4982 | // the entity is initialized as specified in [dcl.init]. | ||||||||||
4983 | // | ||||||||||
4984 | // We also apply the same rules to handle anonymous structs within anonymous | ||||||||||
4985 | // unions. | ||||||||||
4986 | if (Info.isWithinInactiveUnionMember(Field, Indirect)) | ||||||||||
4987 | return false; | ||||||||||
4988 | |||||||||||
4989 | if (Field->hasInClassInitializer() && !Info.isImplicitCopyOrMove()) { | ||||||||||
4990 | ExprResult DIE = | ||||||||||
4991 | SemaRef.BuildCXXDefaultInitExpr(Info.Ctor->getLocation(), Field); | ||||||||||
4992 | if (DIE.isInvalid()) | ||||||||||
4993 | return true; | ||||||||||
4994 | |||||||||||
4995 | auto Entity = InitializedEntity::InitializeMember(Field, nullptr, true); | ||||||||||
4996 | SemaRef.checkInitializerLifetime(Entity, DIE.get()); | ||||||||||
4997 | |||||||||||
4998 | CXXCtorInitializer *Init; | ||||||||||
4999 | if (Indirect) | ||||||||||
5000 | Init = new (SemaRef.Context) | ||||||||||
5001 | CXXCtorInitializer(SemaRef.Context, Indirect, SourceLocation(), | ||||||||||
5002 | SourceLocation(), DIE.get(), SourceLocation()); | ||||||||||
5003 | else | ||||||||||
5004 | Init = new (SemaRef.Context) | ||||||||||
5005 | CXXCtorInitializer(SemaRef.Context, Field, SourceLocation(), | ||||||||||
5006 | SourceLocation(), DIE.get(), SourceLocation()); | ||||||||||
5007 | return Info.addFieldInitializer(Init); | ||||||||||
5008 | } | ||||||||||
5009 | |||||||||||
5010 | // Don't initialize incomplete or zero-length arrays. | ||||||||||
5011 | if (isIncompleteOrZeroLengthArrayType(SemaRef.Context, Field->getType())) | ||||||||||
5012 | return false; | ||||||||||
5013 | |||||||||||
5014 | // Don't try to build an implicit initializer if there were semantic | ||||||||||
5015 | // errors in any of the initializers (and therefore we might be | ||||||||||
5016 | // missing some that the user actually wrote). | ||||||||||
5017 | if (Info.AnyErrorsInInits) | ||||||||||
5018 | return false; | ||||||||||
5019 | |||||||||||
5020 | CXXCtorInitializer *Init = nullptr; | ||||||||||
5021 | if (BuildImplicitMemberInitializer(Info.S, Info.Ctor, Info.IIK, Field, | ||||||||||
5022 | Indirect, Init)) | ||||||||||
5023 | return true; | ||||||||||
5024 | |||||||||||
5025 | if (!Init) | ||||||||||
5026 | return false; | ||||||||||
5027 | |||||||||||
5028 | return Info.addFieldInitializer(Init); | ||||||||||
5029 | } | ||||||||||
5030 | |||||||||||
5031 | bool | ||||||||||
5032 | Sema::SetDelegatingInitializer(CXXConstructorDecl *Constructor, | ||||||||||
5033 | CXXCtorInitializer *Initializer) { | ||||||||||
5034 | assert(Initializer->isDelegatingInitializer())(static_cast <bool> (Initializer->isDelegatingInitializer ()) ? void (0) : __assert_fail ("Initializer->isDelegatingInitializer()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5034, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5035 | Constructor->setNumCtorInitializers(1); | ||||||||||
5036 | CXXCtorInitializer **initializer = | ||||||||||
5037 | new (Context) CXXCtorInitializer*[1]; | ||||||||||
5038 | memcpy(initializer, &Initializer, sizeof (CXXCtorInitializer*)); | ||||||||||
5039 | Constructor->setCtorInitializers(initializer); | ||||||||||
5040 | |||||||||||
5041 | if (CXXDestructorDecl *Dtor = LookupDestructor(Constructor->getParent())) { | ||||||||||
5042 | MarkFunctionReferenced(Initializer->getSourceLocation(), Dtor); | ||||||||||
5043 | DiagnoseUseOfDecl(Dtor, Initializer->getSourceLocation()); | ||||||||||
5044 | } | ||||||||||
5045 | |||||||||||
5046 | DelegatingCtorDecls.push_back(Constructor); | ||||||||||
5047 | |||||||||||
5048 | DiagnoseUninitializedFields(*this, Constructor); | ||||||||||
5049 | |||||||||||
5050 | return false; | ||||||||||
5051 | } | ||||||||||
5052 | |||||||||||
5053 | bool Sema::SetCtorInitializers(CXXConstructorDecl *Constructor, bool AnyErrors, | ||||||||||
5054 | ArrayRef<CXXCtorInitializer *> Initializers) { | ||||||||||
5055 | if (Constructor->isDependentContext()) { | ||||||||||
5056 | // Just store the initializers as written, they will be checked during | ||||||||||
5057 | // instantiation. | ||||||||||
5058 | if (!Initializers.empty()) { | ||||||||||
5059 | Constructor->setNumCtorInitializers(Initializers.size()); | ||||||||||
5060 | CXXCtorInitializer **baseOrMemberInitializers = | ||||||||||
5061 | new (Context) CXXCtorInitializer*[Initializers.size()]; | ||||||||||
5062 | memcpy(baseOrMemberInitializers, Initializers.data(), | ||||||||||
5063 | Initializers.size() * sizeof(CXXCtorInitializer*)); | ||||||||||
5064 | Constructor->setCtorInitializers(baseOrMemberInitializers); | ||||||||||
5065 | } | ||||||||||
5066 | |||||||||||
5067 | // Let template instantiation know whether we had errors. | ||||||||||
5068 | if (AnyErrors) | ||||||||||
5069 | Constructor->setInvalidDecl(); | ||||||||||
5070 | |||||||||||
5071 | return false; | ||||||||||
5072 | } | ||||||||||
5073 | |||||||||||
5074 | BaseAndFieldInfo Info(*this, Constructor, AnyErrors); | ||||||||||
5075 | |||||||||||
5076 | // We need to build the initializer AST according to order of construction | ||||||||||
5077 | // and not what user specified in the Initializers list. | ||||||||||
5078 | CXXRecordDecl *ClassDecl = Constructor->getParent()->getDefinition(); | ||||||||||
5079 | if (!ClassDecl) | ||||||||||
5080 | return true; | ||||||||||
5081 | |||||||||||
5082 | bool HadError = false; | ||||||||||
5083 | |||||||||||
5084 | for (unsigned i = 0; i < Initializers.size(); i++) { | ||||||||||
5085 | CXXCtorInitializer *Member = Initializers[i]; | ||||||||||
5086 | |||||||||||
5087 | if (Member->isBaseInitializer()) | ||||||||||
5088 | Info.AllBaseFields[Member->getBaseClass()->getAs<RecordType>()] = Member; | ||||||||||
5089 | else { | ||||||||||
5090 | Info.AllBaseFields[Member->getAnyMember()->getCanonicalDecl()] = Member; | ||||||||||
5091 | |||||||||||
5092 | if (IndirectFieldDecl *F = Member->getIndirectMember()) { | ||||||||||
5093 | for (auto *C : F->chain()) { | ||||||||||
5094 | FieldDecl *FD = dyn_cast<FieldDecl>(C); | ||||||||||
5095 | if (FD && FD->getParent()->isUnion()) | ||||||||||
5096 | Info.ActiveUnionMember.insert(std::make_pair( | ||||||||||
5097 | FD->getParent()->getCanonicalDecl(), FD->getCanonicalDecl())); | ||||||||||
5098 | } | ||||||||||
5099 | } else if (FieldDecl *FD = Member->getMember()) { | ||||||||||
5100 | if (FD->getParent()->isUnion()) | ||||||||||
5101 | Info.ActiveUnionMember.insert(std::make_pair( | ||||||||||
5102 | FD->getParent()->getCanonicalDecl(), FD->getCanonicalDecl())); | ||||||||||
5103 | } | ||||||||||
5104 | } | ||||||||||
5105 | } | ||||||||||
5106 | |||||||||||
5107 | // Keep track of the direct virtual bases. | ||||||||||
5108 | llvm::SmallPtrSet<CXXBaseSpecifier *, 16> DirectVBases; | ||||||||||
5109 | for (auto &I : ClassDecl->bases()) { | ||||||||||
5110 | if (I.isVirtual()) | ||||||||||
5111 | DirectVBases.insert(&I); | ||||||||||
5112 | } | ||||||||||
5113 | |||||||||||
5114 | // Push virtual bases before others. | ||||||||||
5115 | for (auto &VBase : ClassDecl->vbases()) { | ||||||||||
5116 | if (CXXCtorInitializer *Value | ||||||||||
5117 | = Info.AllBaseFields.lookup(VBase.getType()->getAs<RecordType>())) { | ||||||||||
5118 | // [class.base.init]p7, per DR257: | ||||||||||
5119 | // A mem-initializer where the mem-initializer-id names a virtual base | ||||||||||
5120 | // class is ignored during execution of a constructor of any class that | ||||||||||
5121 | // is not the most derived class. | ||||||||||
5122 | if (ClassDecl->isAbstract()) { | ||||||||||
5123 | // FIXME: Provide a fixit to remove the base specifier. This requires | ||||||||||
5124 | // tracking the location of the associated comma for a base specifier. | ||||||||||
5125 | Diag(Value->getSourceLocation(), diag::warn_abstract_vbase_init_ignored) | ||||||||||
5126 | << VBase.getType() << ClassDecl; | ||||||||||
5127 | DiagnoseAbstractType(ClassDecl); | ||||||||||
5128 | } | ||||||||||
5129 | |||||||||||
5130 | Info.AllToInit.push_back(Value); | ||||||||||
5131 | } else if (!AnyErrors && !ClassDecl->isAbstract()) { | ||||||||||
5132 | // [class.base.init]p8, per DR257: | ||||||||||
5133 | // If a given [...] base class is not named by a mem-initializer-id | ||||||||||
5134 | // [...] and the entity is not a virtual base class of an abstract | ||||||||||
5135 | // class, then [...] the entity is default-initialized. | ||||||||||
5136 | bool IsInheritedVirtualBase = !DirectVBases.count(&VBase); | ||||||||||
5137 | CXXCtorInitializer *CXXBaseInit; | ||||||||||
5138 | if (BuildImplicitBaseInitializer(*this, Constructor, Info.IIK, | ||||||||||
5139 | &VBase, IsInheritedVirtualBase, | ||||||||||
5140 | CXXBaseInit)) { | ||||||||||
5141 | HadError = true; | ||||||||||
5142 | continue; | ||||||||||
5143 | } | ||||||||||
5144 | |||||||||||
5145 | Info.AllToInit.push_back(CXXBaseInit); | ||||||||||
5146 | } | ||||||||||
5147 | } | ||||||||||
5148 | |||||||||||
5149 | // Non-virtual bases. | ||||||||||
5150 | for (auto &Base : ClassDecl->bases()) { | ||||||||||
5151 | // Virtuals are in the virtual base list and already constructed. | ||||||||||
5152 | if (Base.isVirtual()) | ||||||||||
5153 | continue; | ||||||||||
5154 | |||||||||||
5155 | if (CXXCtorInitializer *Value | ||||||||||
5156 | = Info.AllBaseFields.lookup(Base.getType()->getAs<RecordType>())) { | ||||||||||
5157 | Info.AllToInit.push_back(Value); | ||||||||||
5158 | } else if (!AnyErrors) { | ||||||||||
5159 | CXXCtorInitializer *CXXBaseInit; | ||||||||||
5160 | if (BuildImplicitBaseInitializer(*this, Constructor, Info.IIK, | ||||||||||
5161 | &Base, /*IsInheritedVirtualBase=*/false, | ||||||||||
5162 | CXXBaseInit)) { | ||||||||||
5163 | HadError = true; | ||||||||||
5164 | continue; | ||||||||||
5165 | } | ||||||||||
5166 | |||||||||||
5167 | Info.AllToInit.push_back(CXXBaseInit); | ||||||||||
5168 | } | ||||||||||
5169 | } | ||||||||||
5170 | |||||||||||
5171 | // Fields. | ||||||||||
5172 | for (auto *Mem : ClassDecl->decls()) { | ||||||||||
5173 | if (auto *F = dyn_cast<FieldDecl>(Mem)) { | ||||||||||
5174 | // C++ [class.bit]p2: | ||||||||||
5175 | // A declaration for a bit-field that omits the identifier declares an | ||||||||||
5176 | // unnamed bit-field. Unnamed bit-fields are not members and cannot be | ||||||||||
5177 | // initialized. | ||||||||||
5178 | if (F->isUnnamedBitfield()) | ||||||||||
5179 | continue; | ||||||||||
5180 | |||||||||||
5181 | // If we're not generating the implicit copy/move constructor, then we'll | ||||||||||
5182 | // handle anonymous struct/union fields based on their individual | ||||||||||
5183 | // indirect fields. | ||||||||||
5184 | if (F->isAnonymousStructOrUnion() && !Info.isImplicitCopyOrMove()) | ||||||||||
5185 | continue; | ||||||||||
5186 | |||||||||||
5187 | if (CollectFieldInitializer(*this, Info, F)) | ||||||||||
5188 | HadError = true; | ||||||||||
5189 | continue; | ||||||||||
5190 | } | ||||||||||
5191 | |||||||||||
5192 | // Beyond this point, we only consider default initialization. | ||||||||||
5193 | if (Info.isImplicitCopyOrMove()) | ||||||||||
5194 | continue; | ||||||||||
5195 | |||||||||||
5196 | if (auto *F = dyn_cast<IndirectFieldDecl>(Mem)) { | ||||||||||
5197 | if (F->getType()->isIncompleteArrayType()) { | ||||||||||
5198 | assert(ClassDecl->hasFlexibleArrayMember() &&(static_cast <bool> (ClassDecl->hasFlexibleArrayMember () && "Incomplete array type is not valid") ? void (0 ) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5199, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
5199 | "Incomplete array type is not valid")(static_cast <bool> (ClassDecl->hasFlexibleArrayMember () && "Incomplete array type is not valid") ? void (0 ) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5199, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5200 | continue; | ||||||||||
5201 | } | ||||||||||
5202 | |||||||||||
5203 | // Initialize each field of an anonymous struct individually. | ||||||||||
5204 | if (CollectFieldInitializer(*this, Info, F->getAnonField(), F)) | ||||||||||
5205 | HadError = true; | ||||||||||
5206 | |||||||||||
5207 | continue; | ||||||||||
5208 | } | ||||||||||
5209 | } | ||||||||||
5210 | |||||||||||
5211 | unsigned NumInitializers = Info.AllToInit.size(); | ||||||||||
5212 | if (NumInitializers > 0) { | ||||||||||
5213 | Constructor->setNumCtorInitializers(NumInitializers); | ||||||||||
5214 | CXXCtorInitializer **baseOrMemberInitializers = | ||||||||||
5215 | new (Context) CXXCtorInitializer*[NumInitializers]; | ||||||||||
5216 | memcpy(baseOrMemberInitializers, Info.AllToInit.data(), | ||||||||||
5217 | NumInitializers * sizeof(CXXCtorInitializer*)); | ||||||||||
5218 | Constructor->setCtorInitializers(baseOrMemberInitializers); | ||||||||||
5219 | |||||||||||
5220 | // Constructors implicitly reference the base and member | ||||||||||
5221 | // destructors. | ||||||||||
5222 | MarkBaseAndMemberDestructorsReferenced(Constructor->getLocation(), | ||||||||||
5223 | Constructor->getParent()); | ||||||||||
5224 | } | ||||||||||
5225 | |||||||||||
5226 | return HadError; | ||||||||||
5227 | } | ||||||||||
5228 | |||||||||||
5229 | static void PopulateKeysForFields(FieldDecl *Field, SmallVectorImpl<const void*> &IdealInits) { | ||||||||||
5230 | if (const RecordType *RT = Field->getType()->getAs<RecordType>()) { | ||||||||||
5231 | const RecordDecl *RD = RT->getDecl(); | ||||||||||
5232 | if (RD->isAnonymousStructOrUnion()) { | ||||||||||
5233 | for (auto *Field : RD->fields()) | ||||||||||
5234 | PopulateKeysForFields(Field, IdealInits); | ||||||||||
5235 | return; | ||||||||||
5236 | } | ||||||||||
5237 | } | ||||||||||
5238 | IdealInits.push_back(Field->getCanonicalDecl()); | ||||||||||
5239 | } | ||||||||||
5240 | |||||||||||
5241 | static const void *GetKeyForBase(ASTContext &Context, QualType BaseType) { | ||||||||||
5242 | return Context.getCanonicalType(BaseType).getTypePtr(); | ||||||||||
5243 | } | ||||||||||
5244 | |||||||||||
5245 | static const void *GetKeyForMember(ASTContext &Context, | ||||||||||
5246 | CXXCtorInitializer *Member) { | ||||||||||
5247 | if (!Member->isAnyMemberInitializer()) | ||||||||||
5248 | return GetKeyForBase(Context, QualType(Member->getBaseClass(), 0)); | ||||||||||
5249 | |||||||||||
5250 | return Member->getAnyMember()->getCanonicalDecl(); | ||||||||||
5251 | } | ||||||||||
5252 | |||||||||||
5253 | static void AddInitializerToDiag(const Sema::SemaDiagnosticBuilder &Diag, | ||||||||||
5254 | const CXXCtorInitializer *Previous, | ||||||||||
5255 | const CXXCtorInitializer *Current) { | ||||||||||
5256 | if (Previous->isAnyMemberInitializer()) | ||||||||||
5257 | Diag << 0 << Previous->getAnyMember(); | ||||||||||
5258 | else | ||||||||||
5259 | Diag << 1 << Previous->getTypeSourceInfo()->getType(); | ||||||||||
5260 | |||||||||||
5261 | if (Current->isAnyMemberInitializer()) | ||||||||||
5262 | Diag << 0 << Current->getAnyMember(); | ||||||||||
5263 | else | ||||||||||
5264 | Diag << 1 << Current->getTypeSourceInfo()->getType(); | ||||||||||
5265 | } | ||||||||||
5266 | |||||||||||
5267 | static void DiagnoseBaseOrMemInitializerOrder( | ||||||||||
5268 | Sema &SemaRef, const CXXConstructorDecl *Constructor, | ||||||||||
5269 | ArrayRef<CXXCtorInitializer *> Inits) { | ||||||||||
5270 | if (Constructor->getDeclContext()->isDependentContext()) | ||||||||||
5271 | return; | ||||||||||
5272 | |||||||||||
5273 | // Don't check initializers order unless the warning is enabled at the | ||||||||||
5274 | // location of at least one initializer. | ||||||||||
5275 | bool ShouldCheckOrder = false; | ||||||||||
5276 | for (unsigned InitIndex = 0; InitIndex != Inits.size(); ++InitIndex) { | ||||||||||
5277 | CXXCtorInitializer *Init = Inits[InitIndex]; | ||||||||||
5278 | if (!SemaRef.Diags.isIgnored(diag::warn_initializer_out_of_order, | ||||||||||
5279 | Init->getSourceLocation())) { | ||||||||||
5280 | ShouldCheckOrder = true; | ||||||||||
5281 | break; | ||||||||||
5282 | } | ||||||||||
5283 | } | ||||||||||
5284 | if (!ShouldCheckOrder) | ||||||||||
5285 | return; | ||||||||||
5286 | |||||||||||
5287 | // Build the list of bases and members in the order that they'll | ||||||||||
5288 | // actually be initialized. The explicit initializers should be in | ||||||||||
5289 | // this same order but may be missing things. | ||||||||||
5290 | SmallVector<const void*, 32> IdealInitKeys; | ||||||||||
5291 | |||||||||||
5292 | const CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||||||||
5293 | |||||||||||
5294 | // 1. Virtual bases. | ||||||||||
5295 | for (const auto &VBase : ClassDecl->vbases()) | ||||||||||
5296 | IdealInitKeys.push_back(GetKeyForBase(SemaRef.Context, VBase.getType())); | ||||||||||
5297 | |||||||||||
5298 | // 2. Non-virtual bases. | ||||||||||
5299 | for (const auto &Base : ClassDecl->bases()) { | ||||||||||
5300 | if (Base.isVirtual()) | ||||||||||
5301 | continue; | ||||||||||
5302 | IdealInitKeys.push_back(GetKeyForBase(SemaRef.Context, Base.getType())); | ||||||||||
5303 | } | ||||||||||
5304 | |||||||||||
5305 | // 3. Direct fields. | ||||||||||
5306 | for (auto *Field : ClassDecl->fields()) { | ||||||||||
5307 | if (Field->isUnnamedBitfield()) | ||||||||||
5308 | continue; | ||||||||||
5309 | |||||||||||
5310 | PopulateKeysForFields(Field, IdealInitKeys); | ||||||||||
5311 | } | ||||||||||
5312 | |||||||||||
5313 | unsigned NumIdealInits = IdealInitKeys.size(); | ||||||||||
5314 | unsigned IdealIndex = 0; | ||||||||||
5315 | |||||||||||
5316 | // Track initializers that are in an incorrect order for either a warning or | ||||||||||
5317 | // note if multiple ones occur. | ||||||||||
5318 | SmallVector<unsigned> WarnIndexes; | ||||||||||
5319 | // Correlates the index of an initializer in the init-list to the index of | ||||||||||
5320 | // the field/base in the class. | ||||||||||
5321 | SmallVector<std::pair<unsigned, unsigned>, 32> CorrelatedInitOrder; | ||||||||||
5322 | |||||||||||
5323 | for (unsigned InitIndex = 0; InitIndex != Inits.size(); ++InitIndex) { | ||||||||||
5324 | const void *InitKey = GetKeyForMember(SemaRef.Context, Inits[InitIndex]); | ||||||||||
5325 | |||||||||||
5326 | // Scan forward to try to find this initializer in the idealized | ||||||||||
5327 | // initializers list. | ||||||||||
5328 | for (; IdealIndex != NumIdealInits; ++IdealIndex) | ||||||||||
5329 | if (InitKey == IdealInitKeys[IdealIndex]) | ||||||||||
5330 | break; | ||||||||||
5331 | |||||||||||
5332 | // If we didn't find this initializer, it must be because we | ||||||||||
5333 | // scanned past it on a previous iteration. That can only | ||||||||||
5334 | // happen if we're out of order; emit a warning. | ||||||||||
5335 | if (IdealIndex == NumIdealInits && InitIndex) { | ||||||||||
5336 | WarnIndexes.push_back(InitIndex); | ||||||||||
5337 | |||||||||||
5338 | // Move back to the initializer's location in the ideal list. | ||||||||||
5339 | for (IdealIndex = 0; IdealIndex != NumIdealInits; ++IdealIndex) | ||||||||||
5340 | if (InitKey == IdealInitKeys[IdealIndex]) | ||||||||||
5341 | break; | ||||||||||
5342 | |||||||||||
5343 | assert(IdealIndex < NumIdealInits &&(static_cast <bool> (IdealIndex < NumIdealInits && "initializer not found in initializer list") ? void (0) : __assert_fail ("IdealIndex < NumIdealInits && \"initializer not found in initializer list\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5344, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
5344 | "initializer not found in initializer list")(static_cast <bool> (IdealIndex < NumIdealInits && "initializer not found in initializer list") ? void (0) : __assert_fail ("IdealIndex < NumIdealInits && \"initializer not found in initializer list\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5344, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5345 | } | ||||||||||
5346 | CorrelatedInitOrder.emplace_back(IdealIndex, InitIndex); | ||||||||||
5347 | } | ||||||||||
5348 | |||||||||||
5349 | if (WarnIndexes.empty()) | ||||||||||
5350 | return; | ||||||||||
5351 | |||||||||||
5352 | // Sort based on the ideal order, first in the pair. | ||||||||||
5353 | llvm::sort(CorrelatedInitOrder, | ||||||||||
5354 | [](auto &LHS, auto &RHS) { return LHS.first < RHS.first; }); | ||||||||||
5355 | |||||||||||
5356 | // Introduce a new scope as SemaDiagnosticBuilder needs to be destroyed to | ||||||||||
5357 | // emit the diagnostic before we can try adding notes. | ||||||||||
5358 | { | ||||||||||
5359 | Sema::SemaDiagnosticBuilder D = SemaRef.Diag( | ||||||||||
5360 | Inits[WarnIndexes.front() - 1]->getSourceLocation(), | ||||||||||
5361 | WarnIndexes.size() == 1 ? diag::warn_initializer_out_of_order | ||||||||||
5362 | : diag::warn_some_initializers_out_of_order); | ||||||||||
5363 | |||||||||||
5364 | for (unsigned I = 0; I < CorrelatedInitOrder.size(); ++I) { | ||||||||||
5365 | if (CorrelatedInitOrder[I].second == I) | ||||||||||
5366 | continue; | ||||||||||
5367 | // Ideally we would be using InsertFromRange here, but clang doesn't | ||||||||||
5368 | // appear to handle InsertFromRange correctly when the source range is | ||||||||||
5369 | // modified by another fix-it. | ||||||||||
5370 | D << FixItHint::CreateReplacement( | ||||||||||
5371 | Inits[I]->getSourceRange(), | ||||||||||
5372 | Lexer::getSourceText( | ||||||||||
5373 | CharSourceRange::getTokenRange( | ||||||||||
5374 | Inits[CorrelatedInitOrder[I].second]->getSourceRange()), | ||||||||||
5375 | SemaRef.getSourceManager(), SemaRef.getLangOpts())); | ||||||||||
5376 | } | ||||||||||
5377 | |||||||||||
5378 | // If there is only 1 item out of order, the warning expects the name and | ||||||||||
5379 | // type of each being added to it. | ||||||||||
5380 | if (WarnIndexes.size() == 1) { | ||||||||||
5381 | AddInitializerToDiag(D, Inits[WarnIndexes.front() - 1], | ||||||||||
5382 | Inits[WarnIndexes.front()]); | ||||||||||
5383 | return; | ||||||||||
5384 | } | ||||||||||
5385 | } | ||||||||||
5386 | // More than 1 item to warn, create notes letting the user know which ones | ||||||||||
5387 | // are bad. | ||||||||||
5388 | for (unsigned WarnIndex : WarnIndexes) { | ||||||||||
5389 | const clang::CXXCtorInitializer *PrevInit = Inits[WarnIndex - 1]; | ||||||||||
5390 | auto D = SemaRef.Diag(PrevInit->getSourceLocation(), | ||||||||||
5391 | diag::note_initializer_out_of_order); | ||||||||||
5392 | AddInitializerToDiag(D, PrevInit, Inits[WarnIndex]); | ||||||||||
5393 | D << PrevInit->getSourceRange(); | ||||||||||
5394 | } | ||||||||||
5395 | } | ||||||||||
5396 | |||||||||||
5397 | namespace { | ||||||||||
5398 | bool CheckRedundantInit(Sema &S, | ||||||||||
5399 | CXXCtorInitializer *Init, | ||||||||||
5400 | CXXCtorInitializer *&PrevInit) { | ||||||||||
5401 | if (!PrevInit) { | ||||||||||
5402 | PrevInit = Init; | ||||||||||
5403 | return false; | ||||||||||
5404 | } | ||||||||||
5405 | |||||||||||
5406 | if (FieldDecl *Field = Init->getAnyMember()) | ||||||||||
5407 | S.Diag(Init->getSourceLocation(), | ||||||||||
5408 | diag::err_multiple_mem_initialization) | ||||||||||
5409 | << Field->getDeclName() | ||||||||||
5410 | << Init->getSourceRange(); | ||||||||||
5411 | else { | ||||||||||
5412 | const Type *BaseClass = Init->getBaseClass(); | ||||||||||
5413 | assert(BaseClass && "neither field nor base")(static_cast <bool> (BaseClass && "neither field nor base" ) ? void (0) : __assert_fail ("BaseClass && \"neither field nor base\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5413, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5414 | S.Diag(Init->getSourceLocation(), | ||||||||||
5415 | diag::err_multiple_base_initialization) | ||||||||||
5416 | << QualType(BaseClass, 0) | ||||||||||
5417 | << Init->getSourceRange(); | ||||||||||
5418 | } | ||||||||||
5419 | S.Diag(PrevInit->getSourceLocation(), diag::note_previous_initializer) | ||||||||||
5420 | << 0 << PrevInit->getSourceRange(); | ||||||||||
5421 | |||||||||||
5422 | return true; | ||||||||||
5423 | } | ||||||||||
5424 | |||||||||||
5425 | typedef std::pair<NamedDecl *, CXXCtorInitializer *> UnionEntry; | ||||||||||
5426 | typedef llvm::DenseMap<RecordDecl*, UnionEntry> RedundantUnionMap; | ||||||||||
5427 | |||||||||||
5428 | bool CheckRedundantUnionInit(Sema &S, | ||||||||||
5429 | CXXCtorInitializer *Init, | ||||||||||
5430 | RedundantUnionMap &Unions) { | ||||||||||
5431 | FieldDecl *Field = Init->getAnyMember(); | ||||||||||
5432 | RecordDecl *Parent = Field->getParent(); | ||||||||||
5433 | NamedDecl *Child = Field; | ||||||||||
5434 | |||||||||||
5435 | while (Parent->isAnonymousStructOrUnion() || Parent->isUnion()) { | ||||||||||
5436 | if (Parent->isUnion()) { | ||||||||||
5437 | UnionEntry &En = Unions[Parent]; | ||||||||||
5438 | if (En.first && En.first != Child) { | ||||||||||
5439 | S.Diag(Init->getSourceLocation(), | ||||||||||
5440 | diag::err_multiple_mem_union_initialization) | ||||||||||
5441 | << Field->getDeclName() | ||||||||||
5442 | << Init->getSourceRange(); | ||||||||||
5443 | S.Diag(En.second->getSourceLocation(), diag::note_previous_initializer) | ||||||||||
5444 | << 0 << En.second->getSourceRange(); | ||||||||||
5445 | return true; | ||||||||||
5446 | } | ||||||||||
5447 | if (!En.first) { | ||||||||||
5448 | En.first = Child; | ||||||||||
5449 | En.second = Init; | ||||||||||
5450 | } | ||||||||||
5451 | if (!Parent->isAnonymousStructOrUnion()) | ||||||||||
5452 | return false; | ||||||||||
5453 | } | ||||||||||
5454 | |||||||||||
5455 | Child = Parent; | ||||||||||
5456 | Parent = cast<RecordDecl>(Parent->getDeclContext()); | ||||||||||
5457 | } | ||||||||||
5458 | |||||||||||
5459 | return false; | ||||||||||
5460 | } | ||||||||||
5461 | } // namespace | ||||||||||
5462 | |||||||||||
5463 | /// ActOnMemInitializers - Handle the member initializers for a constructor. | ||||||||||
5464 | void Sema::ActOnMemInitializers(Decl *ConstructorDecl, | ||||||||||
5465 | SourceLocation ColonLoc, | ||||||||||
5466 | ArrayRef<CXXCtorInitializer*> MemInits, | ||||||||||
5467 | bool AnyErrors) { | ||||||||||
5468 | if (!ConstructorDecl) | ||||||||||
5469 | return; | ||||||||||
5470 | |||||||||||
5471 | AdjustDeclIfTemplate(ConstructorDecl); | ||||||||||
5472 | |||||||||||
5473 | CXXConstructorDecl *Constructor | ||||||||||
5474 | = dyn_cast<CXXConstructorDecl>(ConstructorDecl); | ||||||||||
5475 | |||||||||||
5476 | if (!Constructor) { | ||||||||||
5477 | Diag(ColonLoc, diag::err_only_constructors_take_base_inits); | ||||||||||
5478 | return; | ||||||||||
5479 | } | ||||||||||
5480 | |||||||||||
5481 | // Mapping for the duplicate initializers check. | ||||||||||
5482 | // For member initializers, this is keyed with a FieldDecl*. | ||||||||||
5483 | // For base initializers, this is keyed with a Type*. | ||||||||||
5484 | llvm::DenseMap<const void *, CXXCtorInitializer *> Members; | ||||||||||
5485 | |||||||||||
5486 | // Mapping for the inconsistent anonymous-union initializers check. | ||||||||||
5487 | RedundantUnionMap MemberUnions; | ||||||||||
5488 | |||||||||||
5489 | bool HadError = false; | ||||||||||
5490 | for (unsigned i = 0; i < MemInits.size(); i++) { | ||||||||||
5491 | CXXCtorInitializer *Init = MemInits[i]; | ||||||||||
5492 | |||||||||||
5493 | // Set the source order index. | ||||||||||
5494 | Init->setSourceOrder(i); | ||||||||||
5495 | |||||||||||
5496 | if (Init->isAnyMemberInitializer()) { | ||||||||||
5497 | const void *Key = GetKeyForMember(Context, Init); | ||||||||||
5498 | if (CheckRedundantInit(*this, Init, Members[Key]) || | ||||||||||
5499 | CheckRedundantUnionInit(*this, Init, MemberUnions)) | ||||||||||
5500 | HadError = true; | ||||||||||
5501 | } else if (Init->isBaseInitializer()) { | ||||||||||
5502 | const void *Key = GetKeyForMember(Context, Init); | ||||||||||
5503 | if (CheckRedundantInit(*this, Init, Members[Key])) | ||||||||||
5504 | HadError = true; | ||||||||||
5505 | } else { | ||||||||||
5506 | assert(Init->isDelegatingInitializer())(static_cast <bool> (Init->isDelegatingInitializer() ) ? void (0) : __assert_fail ("Init->isDelegatingInitializer()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5506, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5507 | // This must be the only initializer | ||||||||||
5508 | if (MemInits.size() != 1) { | ||||||||||
5509 | Diag(Init->getSourceLocation(), | ||||||||||
5510 | diag::err_delegating_initializer_alone) | ||||||||||
5511 | << Init->getSourceRange() << MemInits[i ? 0 : 1]->getSourceRange(); | ||||||||||
5512 | // We will treat this as being the only initializer. | ||||||||||
5513 | } | ||||||||||
5514 | SetDelegatingInitializer(Constructor, MemInits[i]); | ||||||||||
5515 | // Return immediately as the initializer is set. | ||||||||||
5516 | return; | ||||||||||
5517 | } | ||||||||||
5518 | } | ||||||||||
5519 | |||||||||||
5520 | if (HadError) | ||||||||||
5521 | return; | ||||||||||
5522 | |||||||||||
5523 | DiagnoseBaseOrMemInitializerOrder(*this, Constructor, MemInits); | ||||||||||
5524 | |||||||||||
5525 | SetCtorInitializers(Constructor, AnyErrors, MemInits); | ||||||||||
5526 | |||||||||||
5527 | DiagnoseUninitializedFields(*this, Constructor); | ||||||||||
5528 | } | ||||||||||
5529 | |||||||||||
5530 | void | ||||||||||
5531 | Sema::MarkBaseAndMemberDestructorsReferenced(SourceLocation Location, | ||||||||||
5532 | CXXRecordDecl *ClassDecl) { | ||||||||||
5533 | // Ignore dependent contexts. Also ignore unions, since their members never | ||||||||||
5534 | // have destructors implicitly called. | ||||||||||
5535 | if (ClassDecl->isDependentContext() || ClassDecl->isUnion()) | ||||||||||
5536 | return; | ||||||||||
5537 | |||||||||||
5538 | // FIXME: all the access-control diagnostics are positioned on the | ||||||||||
5539 | // field/base declaration. That's probably good; that said, the | ||||||||||
5540 | // user might reasonably want to know why the destructor is being | ||||||||||
5541 | // emitted, and we currently don't say. | ||||||||||
5542 | |||||||||||
5543 | // Non-static data members. | ||||||||||
5544 | for (auto *Field : ClassDecl->fields()) { | ||||||||||
5545 | if (Field->isInvalidDecl()) | ||||||||||
5546 | continue; | ||||||||||
5547 | |||||||||||
5548 | // Don't destroy incomplete or zero-length arrays. | ||||||||||
5549 | if (isIncompleteOrZeroLengthArrayType(Context, Field->getType())) | ||||||||||
5550 | continue; | ||||||||||
5551 | |||||||||||
5552 | QualType FieldType = Context.getBaseElementType(Field->getType()); | ||||||||||
5553 | |||||||||||
5554 | const RecordType* RT = FieldType->getAs<RecordType>(); | ||||||||||
5555 | if (!RT) | ||||||||||
5556 | continue; | ||||||||||
5557 | |||||||||||
5558 | CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||||||
5559 | if (FieldClassDecl->isInvalidDecl()) | ||||||||||
5560 | continue; | ||||||||||
5561 | if (FieldClassDecl->hasIrrelevantDestructor()) | ||||||||||
5562 | continue; | ||||||||||
5563 | // The destructor for an implicit anonymous union member is never invoked. | ||||||||||
5564 | if (FieldClassDecl->isUnion() && FieldClassDecl->isAnonymousStructOrUnion()) | ||||||||||
5565 | continue; | ||||||||||
5566 | |||||||||||
5567 | CXXDestructorDecl *Dtor = LookupDestructor(FieldClassDecl); | ||||||||||
5568 | assert(Dtor && "No dtor found for FieldClassDecl!")(static_cast <bool> (Dtor && "No dtor found for FieldClassDecl!" ) ? void (0) : __assert_fail ("Dtor && \"No dtor found for FieldClassDecl!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5568, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5569 | CheckDestructorAccess(Field->getLocation(), Dtor, | ||||||||||
5570 | PDiag(diag::err_access_dtor_field) | ||||||||||
5571 | << Field->getDeclName() | ||||||||||
5572 | << FieldType); | ||||||||||
5573 | |||||||||||
5574 | MarkFunctionReferenced(Location, Dtor); | ||||||||||
5575 | DiagnoseUseOfDecl(Dtor, Location); | ||||||||||
5576 | } | ||||||||||
5577 | |||||||||||
5578 | // We only potentially invoke the destructors of potentially constructed | ||||||||||
5579 | // subobjects. | ||||||||||
5580 | bool VisitVirtualBases = !ClassDecl->isAbstract(); | ||||||||||
5581 | |||||||||||
5582 | // If the destructor exists and has already been marked used in the MS ABI, | ||||||||||
5583 | // then virtual base destructors have already been checked and marked used. | ||||||||||
5584 | // Skip checking them again to avoid duplicate diagnostics. | ||||||||||
5585 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||||||
5586 | CXXDestructorDecl *Dtor = ClassDecl->getDestructor(); | ||||||||||
5587 | if (Dtor && Dtor->isUsed()) | ||||||||||
5588 | VisitVirtualBases = false; | ||||||||||
5589 | } | ||||||||||
5590 | |||||||||||
5591 | llvm::SmallPtrSet<const RecordType *, 8> DirectVirtualBases; | ||||||||||
5592 | |||||||||||
5593 | // Bases. | ||||||||||
5594 | for (const auto &Base : ClassDecl->bases()) { | ||||||||||
5595 | const RecordType *RT = Base.getType()->getAs<RecordType>(); | ||||||||||
5596 | if (!RT) | ||||||||||
5597 | continue; | ||||||||||
5598 | |||||||||||
5599 | // Remember direct virtual bases. | ||||||||||
5600 | if (Base.isVirtual()) { | ||||||||||
5601 | if (!VisitVirtualBases) | ||||||||||
5602 | continue; | ||||||||||
5603 | DirectVirtualBases.insert(RT); | ||||||||||
5604 | } | ||||||||||
5605 | |||||||||||
5606 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||||||
5607 | // If our base class is invalid, we probably can't get its dtor anyway. | ||||||||||
5608 | if (BaseClassDecl->isInvalidDecl()) | ||||||||||
5609 | continue; | ||||||||||
5610 | if (BaseClassDecl->hasIrrelevantDestructor()) | ||||||||||
5611 | continue; | ||||||||||
5612 | |||||||||||
5613 | CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl); | ||||||||||
5614 | assert(Dtor && "No dtor found for BaseClassDecl!")(static_cast <bool> (Dtor && "No dtor found for BaseClassDecl!" ) ? void (0) : __assert_fail ("Dtor && \"No dtor found for BaseClassDecl!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5614, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5615 | |||||||||||
5616 | // FIXME: caret should be on the start of the class name | ||||||||||
5617 | CheckDestructorAccess(Base.getBeginLoc(), Dtor, | ||||||||||
5618 | PDiag(diag::err_access_dtor_base) | ||||||||||
5619 | << Base.getType() << Base.getSourceRange(), | ||||||||||
5620 | Context.getTypeDeclType(ClassDecl)); | ||||||||||
5621 | |||||||||||
5622 | MarkFunctionReferenced(Location, Dtor); | ||||||||||
5623 | DiagnoseUseOfDecl(Dtor, Location); | ||||||||||
5624 | } | ||||||||||
5625 | |||||||||||
5626 | if (VisitVirtualBases) | ||||||||||
5627 | MarkVirtualBaseDestructorsReferenced(Location, ClassDecl, | ||||||||||
5628 | &DirectVirtualBases); | ||||||||||
5629 | } | ||||||||||
5630 | |||||||||||
5631 | void Sema::MarkVirtualBaseDestructorsReferenced( | ||||||||||
5632 | SourceLocation Location, CXXRecordDecl *ClassDecl, | ||||||||||
5633 | llvm::SmallPtrSetImpl<const RecordType *> *DirectVirtualBases) { | ||||||||||
5634 | // Virtual bases. | ||||||||||
5635 | for (const auto &VBase : ClassDecl->vbases()) { | ||||||||||
5636 | // Bases are always records in a well-formed non-dependent class. | ||||||||||
5637 | const RecordType *RT = VBase.getType()->castAs<RecordType>(); | ||||||||||
5638 | |||||||||||
5639 | // Ignore already visited direct virtual bases. | ||||||||||
5640 | if (DirectVirtualBases && DirectVirtualBases->count(RT)) | ||||||||||
5641 | continue; | ||||||||||
5642 | |||||||||||
5643 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||||||
5644 | // If our base class is invalid, we probably can't get its dtor anyway. | ||||||||||
5645 | if (BaseClassDecl->isInvalidDecl()) | ||||||||||
5646 | continue; | ||||||||||
5647 | if (BaseClassDecl->hasIrrelevantDestructor()) | ||||||||||
5648 | continue; | ||||||||||
5649 | |||||||||||
5650 | CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl); | ||||||||||
5651 | assert(Dtor && "No dtor found for BaseClassDecl!")(static_cast <bool> (Dtor && "No dtor found for BaseClassDecl!" ) ? void (0) : __assert_fail ("Dtor && \"No dtor found for BaseClassDecl!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5651, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5652 | if (CheckDestructorAccess( | ||||||||||
5653 | ClassDecl->getLocation(), Dtor, | ||||||||||
5654 | PDiag(diag::err_access_dtor_vbase) | ||||||||||
5655 | << Context.getTypeDeclType(ClassDecl) << VBase.getType(), | ||||||||||
5656 | Context.getTypeDeclType(ClassDecl)) == | ||||||||||
5657 | AR_accessible) { | ||||||||||
5658 | CheckDerivedToBaseConversion( | ||||||||||
5659 | Context.getTypeDeclType(ClassDecl), VBase.getType(), | ||||||||||
5660 | diag::err_access_dtor_vbase, 0, ClassDecl->getLocation(), | ||||||||||
5661 | SourceRange(), DeclarationName(), nullptr); | ||||||||||
5662 | } | ||||||||||
5663 | |||||||||||
5664 | MarkFunctionReferenced(Location, Dtor); | ||||||||||
5665 | DiagnoseUseOfDecl(Dtor, Location); | ||||||||||
5666 | } | ||||||||||
5667 | } | ||||||||||
5668 | |||||||||||
5669 | void Sema::ActOnDefaultCtorInitializers(Decl *CDtorDecl) { | ||||||||||
5670 | if (!CDtorDecl) | ||||||||||
5671 | return; | ||||||||||
5672 | |||||||||||
5673 | if (CXXConstructorDecl *Constructor | ||||||||||
5674 | = dyn_cast<CXXConstructorDecl>(CDtorDecl)) { | ||||||||||
5675 | SetCtorInitializers(Constructor, /*AnyErrors=*/false); | ||||||||||
5676 | DiagnoseUninitializedFields(*this, Constructor); | ||||||||||
5677 | } | ||||||||||
5678 | } | ||||||||||
5679 | |||||||||||
5680 | bool Sema::isAbstractType(SourceLocation Loc, QualType T) { | ||||||||||
5681 | if (!getLangOpts().CPlusPlus) | ||||||||||
5682 | return false; | ||||||||||
5683 | |||||||||||
5684 | const auto *RD = Context.getBaseElementType(T)->getAsCXXRecordDecl(); | ||||||||||
5685 | if (!RD) | ||||||||||
5686 | return false; | ||||||||||
5687 | |||||||||||
5688 | // FIXME: Per [temp.inst]p1, we are supposed to trigger instantiation of a | ||||||||||
5689 | // class template specialization here, but doing so breaks a lot of code. | ||||||||||
5690 | |||||||||||
5691 | // We can't answer whether something is abstract until it has a | ||||||||||
5692 | // definition. If it's currently being defined, we'll walk back | ||||||||||
5693 | // over all the declarations when we have a full definition. | ||||||||||
5694 | const CXXRecordDecl *Def = RD->getDefinition(); | ||||||||||
5695 | if (!Def || Def->isBeingDefined()) | ||||||||||
5696 | return false; | ||||||||||
5697 | |||||||||||
5698 | return RD->isAbstract(); | ||||||||||
5699 | } | ||||||||||
5700 | |||||||||||
5701 | bool Sema::RequireNonAbstractType(SourceLocation Loc, QualType T, | ||||||||||
5702 | TypeDiagnoser &Diagnoser) { | ||||||||||
5703 | if (!isAbstractType(Loc, T)) | ||||||||||
5704 | return false; | ||||||||||
5705 | |||||||||||
5706 | T = Context.getBaseElementType(T); | ||||||||||
5707 | Diagnoser.diagnose(*this, Loc, T); | ||||||||||
5708 | DiagnoseAbstractType(T->getAsCXXRecordDecl()); | ||||||||||
5709 | return true; | ||||||||||
5710 | } | ||||||||||
5711 | |||||||||||
5712 | void Sema::DiagnoseAbstractType(const CXXRecordDecl *RD) { | ||||||||||
5713 | // Check if we've already emitted the list of pure virtual functions | ||||||||||
5714 | // for this class. | ||||||||||
5715 | if (PureVirtualClassDiagSet && PureVirtualClassDiagSet->count(RD)) | ||||||||||
5716 | return; | ||||||||||
5717 | |||||||||||
5718 | // If the diagnostic is suppressed, don't emit the notes. We're only | ||||||||||
5719 | // going to emit them once, so try to attach them to a diagnostic we're | ||||||||||
5720 | // actually going to show. | ||||||||||
5721 | if (Diags.isLastDiagnosticIgnored()) | ||||||||||
5722 | return; | ||||||||||
5723 | |||||||||||
5724 | CXXFinalOverriderMap FinalOverriders; | ||||||||||
5725 | RD->getFinalOverriders(FinalOverriders); | ||||||||||
5726 | |||||||||||
5727 | // Keep a set of seen pure methods so we won't diagnose the same method | ||||||||||
5728 | // more than once. | ||||||||||
5729 | llvm::SmallPtrSet<const CXXMethodDecl *, 8> SeenPureMethods; | ||||||||||
5730 | |||||||||||
5731 | for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(), | ||||||||||
5732 | MEnd = FinalOverriders.end(); | ||||||||||
5733 | M != MEnd; | ||||||||||
5734 | ++M) { | ||||||||||
5735 | for (OverridingMethods::iterator SO = M->second.begin(), | ||||||||||
5736 | SOEnd = M->second.end(); | ||||||||||
5737 | SO != SOEnd; ++SO) { | ||||||||||
5738 | // C++ [class.abstract]p4: | ||||||||||
5739 | // A class is abstract if it contains or inherits at least one | ||||||||||
5740 | // pure virtual function for which the final overrider is pure | ||||||||||
5741 | // virtual. | ||||||||||
5742 | |||||||||||
5743 | // | ||||||||||
5744 | if (SO->second.size() != 1) | ||||||||||
5745 | continue; | ||||||||||
5746 | |||||||||||
5747 | if (!SO->second.front().Method->isPure()) | ||||||||||
5748 | continue; | ||||||||||
5749 | |||||||||||
5750 | if (!SeenPureMethods.insert(SO->second.front().Method).second) | ||||||||||
5751 | continue; | ||||||||||
5752 | |||||||||||
5753 | Diag(SO->second.front().Method->getLocation(), | ||||||||||
5754 | diag::note_pure_virtual_function) | ||||||||||
5755 | << SO->second.front().Method->getDeclName() << RD->getDeclName(); | ||||||||||
5756 | } | ||||||||||
5757 | } | ||||||||||
5758 | |||||||||||
5759 | if (!PureVirtualClassDiagSet) | ||||||||||
5760 | PureVirtualClassDiagSet.reset(new RecordDeclSetTy); | ||||||||||
5761 | PureVirtualClassDiagSet->insert(RD); | ||||||||||
5762 | } | ||||||||||
5763 | |||||||||||
5764 | namespace { | ||||||||||
5765 | struct AbstractUsageInfo { | ||||||||||
5766 | Sema &S; | ||||||||||
5767 | CXXRecordDecl *Record; | ||||||||||
5768 | CanQualType AbstractType; | ||||||||||
5769 | bool Invalid; | ||||||||||
5770 | |||||||||||
5771 | AbstractUsageInfo(Sema &S, CXXRecordDecl *Record) | ||||||||||
5772 | : S(S), Record(Record), | ||||||||||
5773 | AbstractType(S.Context.getCanonicalType( | ||||||||||
5774 | S.Context.getTypeDeclType(Record))), | ||||||||||
5775 | Invalid(false) {} | ||||||||||
5776 | |||||||||||
5777 | void DiagnoseAbstractType() { | ||||||||||
5778 | if (Invalid) return; | ||||||||||
5779 | S.DiagnoseAbstractType(Record); | ||||||||||
5780 | Invalid = true; | ||||||||||
5781 | } | ||||||||||
5782 | |||||||||||
5783 | void CheckType(const NamedDecl *D, TypeLoc TL, Sema::AbstractDiagSelID Sel); | ||||||||||
5784 | }; | ||||||||||
5785 | |||||||||||
5786 | struct CheckAbstractUsage { | ||||||||||
5787 | AbstractUsageInfo &Info; | ||||||||||
5788 | const NamedDecl *Ctx; | ||||||||||
5789 | |||||||||||
5790 | CheckAbstractUsage(AbstractUsageInfo &Info, const NamedDecl *Ctx) | ||||||||||
5791 | : Info(Info), Ctx(Ctx) {} | ||||||||||
5792 | |||||||||||
5793 | void Visit(TypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||||||
5794 | switch (TL.getTypeLocClass()) { | ||||||||||
5795 | #define ABSTRACT_TYPELOC(CLASS, PARENT) | ||||||||||
5796 | #define TYPELOC(CLASS, PARENT) \ | ||||||||||
5797 | case TypeLoc::CLASS: Check(TL.castAs<CLASS##TypeLoc>(), Sel); break; | ||||||||||
5798 | #include "clang/AST/TypeLocNodes.def" | ||||||||||
5799 | } | ||||||||||
5800 | } | ||||||||||
5801 | |||||||||||
5802 | void Check(FunctionProtoTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||||||
5803 | Visit(TL.getReturnLoc(), Sema::AbstractReturnType); | ||||||||||
5804 | for (unsigned I = 0, E = TL.getNumParams(); I != E; ++I) { | ||||||||||
5805 | if (!TL.getParam(I)) | ||||||||||
5806 | continue; | ||||||||||
5807 | |||||||||||
5808 | TypeSourceInfo *TSI = TL.getParam(I)->getTypeSourceInfo(); | ||||||||||
5809 | if (TSI) Visit(TSI->getTypeLoc(), Sema::AbstractParamType); | ||||||||||
5810 | } | ||||||||||
5811 | } | ||||||||||
5812 | |||||||||||
5813 | void Check(ArrayTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||||||
5814 | Visit(TL.getElementLoc(), Sema::AbstractArrayType); | ||||||||||
5815 | } | ||||||||||
5816 | |||||||||||
5817 | void Check(TemplateSpecializationTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||||||
5818 | // Visit the type parameters from a permissive context. | ||||||||||
5819 | for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) { | ||||||||||
5820 | TemplateArgumentLoc TAL = TL.getArgLoc(I); | ||||||||||
5821 | if (TAL.getArgument().getKind() == TemplateArgument::Type) | ||||||||||
5822 | if (TypeSourceInfo *TSI = TAL.getTypeSourceInfo()) | ||||||||||
5823 | Visit(TSI->getTypeLoc(), Sema::AbstractNone); | ||||||||||
5824 | // TODO: other template argument types? | ||||||||||
5825 | } | ||||||||||
5826 | } | ||||||||||
5827 | |||||||||||
5828 | // Visit pointee types from a permissive context. | ||||||||||
5829 | #define CheckPolymorphic(Type)void Check(Type TL, Sema::AbstractDiagSelID Sel) { Visit(TL.getNextTypeLoc (), Sema::AbstractNone); } \ | ||||||||||
5830 | void Check(Type TL, Sema::AbstractDiagSelID Sel) { \ | ||||||||||
5831 | Visit(TL.getNextTypeLoc(), Sema::AbstractNone); \ | ||||||||||
5832 | } | ||||||||||
5833 | CheckPolymorphic(PointerTypeLoc)void Check(PointerTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit (TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||||||
5834 | CheckPolymorphic(ReferenceTypeLoc)void Check(ReferenceTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||||||
5835 | CheckPolymorphic(MemberPointerTypeLoc)void Check(MemberPointerTypeLoc TL, Sema::AbstractDiagSelID Sel ) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||||||
5836 | CheckPolymorphic(BlockPointerTypeLoc)void Check(BlockPointerTypeLoc TL, Sema::AbstractDiagSelID Sel ) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||||||
5837 | CheckPolymorphic(AtomicTypeLoc)void Check(AtomicTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit (TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||||||
5838 | |||||||||||
5839 | /// Handle all the types we haven't given a more specific | ||||||||||
5840 | /// implementation for above. | ||||||||||
5841 | void Check(TypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||||||
5842 | // Every other kind of type that we haven't called out already | ||||||||||
5843 | // that has an inner type is either (1) sugar or (2) contains that | ||||||||||
5844 | // inner type in some way as a subobject. | ||||||||||
5845 | if (TypeLoc Next = TL.getNextTypeLoc()) | ||||||||||
5846 | return Visit(Next, Sel); | ||||||||||
5847 | |||||||||||
5848 | // If there's no inner type and we're in a permissive context, | ||||||||||
5849 | // don't diagnose. | ||||||||||
5850 | if (Sel == Sema::AbstractNone) return; | ||||||||||
5851 | |||||||||||
5852 | // Check whether the type matches the abstract type. | ||||||||||
5853 | QualType T = TL.getType(); | ||||||||||
5854 | if (T->isArrayType()) { | ||||||||||
5855 | Sel = Sema::AbstractArrayType; | ||||||||||
5856 | T = Info.S.Context.getBaseElementType(T); | ||||||||||
5857 | } | ||||||||||
5858 | CanQualType CT = T->getCanonicalTypeUnqualified().getUnqualifiedType(); | ||||||||||
5859 | if (CT != Info.AbstractType) return; | ||||||||||
5860 | |||||||||||
5861 | // It matched; do some magic. | ||||||||||
5862 | if (Sel == Sema::AbstractArrayType) { | ||||||||||
5863 | Info.S.Diag(Ctx->getLocation(), diag::err_array_of_abstract_type) | ||||||||||
5864 | << T << TL.getSourceRange(); | ||||||||||
5865 | } else { | ||||||||||
5866 | Info.S.Diag(Ctx->getLocation(), diag::err_abstract_type_in_decl) | ||||||||||
5867 | << Sel << T << TL.getSourceRange(); | ||||||||||
5868 | } | ||||||||||
5869 | Info.DiagnoseAbstractType(); | ||||||||||
5870 | } | ||||||||||
5871 | }; | ||||||||||
5872 | |||||||||||
5873 | void AbstractUsageInfo::CheckType(const NamedDecl *D, TypeLoc TL, | ||||||||||
5874 | Sema::AbstractDiagSelID Sel) { | ||||||||||
5875 | CheckAbstractUsage(*this, D).Visit(TL, Sel); | ||||||||||
5876 | } | ||||||||||
5877 | |||||||||||
5878 | } | ||||||||||
5879 | |||||||||||
5880 | /// Check for invalid uses of an abstract type in a method declaration. | ||||||||||
5881 | static void CheckAbstractClassUsage(AbstractUsageInfo &Info, | ||||||||||
5882 | CXXMethodDecl *MD) { | ||||||||||
5883 | // No need to do the check on definitions, which require that | ||||||||||
5884 | // the return/param types be complete. | ||||||||||
5885 | if (MD->doesThisDeclarationHaveABody()) | ||||||||||
5886 | return; | ||||||||||
5887 | |||||||||||
5888 | // For safety's sake, just ignore it if we don't have type source | ||||||||||
5889 | // information. This should never happen for non-implicit methods, | ||||||||||
5890 | // but... | ||||||||||
5891 | if (TypeSourceInfo *TSI = MD->getTypeSourceInfo()) | ||||||||||
5892 | Info.CheckType(MD, TSI->getTypeLoc(), Sema::AbstractNone); | ||||||||||
5893 | } | ||||||||||
5894 | |||||||||||
5895 | /// Check for invalid uses of an abstract type within a class definition. | ||||||||||
5896 | static void CheckAbstractClassUsage(AbstractUsageInfo &Info, | ||||||||||
5897 | CXXRecordDecl *RD) { | ||||||||||
5898 | for (auto *D : RD->decls()) { | ||||||||||
5899 | if (D->isImplicit()) continue; | ||||||||||
5900 | |||||||||||
5901 | // Methods and method templates. | ||||||||||
5902 | if (isa<CXXMethodDecl>(D)) { | ||||||||||
5903 | CheckAbstractClassUsage(Info, cast<CXXMethodDecl>(D)); | ||||||||||
5904 | } else if (isa<FunctionTemplateDecl>(D)) { | ||||||||||
5905 | FunctionDecl *FD = cast<FunctionTemplateDecl>(D)->getTemplatedDecl(); | ||||||||||
5906 | CheckAbstractClassUsage(Info, cast<CXXMethodDecl>(FD)); | ||||||||||
5907 | |||||||||||
5908 | // Fields and static variables. | ||||||||||
5909 | } else if (isa<FieldDecl>(D)) { | ||||||||||
5910 | FieldDecl *FD = cast<FieldDecl>(D); | ||||||||||
5911 | if (TypeSourceInfo *TSI = FD->getTypeSourceInfo()) | ||||||||||
5912 | Info.CheckType(FD, TSI->getTypeLoc(), Sema::AbstractFieldType); | ||||||||||
5913 | } else if (isa<VarDecl>(D)) { | ||||||||||
5914 | VarDecl *VD = cast<VarDecl>(D); | ||||||||||
5915 | if (TypeSourceInfo *TSI = VD->getTypeSourceInfo()) | ||||||||||
5916 | Info.CheckType(VD, TSI->getTypeLoc(), Sema::AbstractVariableType); | ||||||||||
5917 | |||||||||||
5918 | // Nested classes and class templates. | ||||||||||
5919 | } else if (isa<CXXRecordDecl>(D)) { | ||||||||||
5920 | CheckAbstractClassUsage(Info, cast<CXXRecordDecl>(D)); | ||||||||||
5921 | } else if (isa<ClassTemplateDecl>(D)) { | ||||||||||
5922 | CheckAbstractClassUsage(Info, | ||||||||||
5923 | cast<ClassTemplateDecl>(D)->getTemplatedDecl()); | ||||||||||
5924 | } | ||||||||||
5925 | } | ||||||||||
5926 | } | ||||||||||
5927 | |||||||||||
5928 | static void ReferenceDllExportedMembers(Sema &S, CXXRecordDecl *Class) { | ||||||||||
5929 | Attr *ClassAttr = getDLLAttr(Class); | ||||||||||
5930 | if (!ClassAttr) | ||||||||||
5931 | return; | ||||||||||
5932 | |||||||||||
5933 | assert(ClassAttr->getKind() == attr::DLLExport)(static_cast <bool> (ClassAttr->getKind() == attr::DLLExport ) ? void (0) : __assert_fail ("ClassAttr->getKind() == attr::DLLExport" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 5933, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
5934 | |||||||||||
5935 | TemplateSpecializationKind TSK = Class->getTemplateSpecializationKind(); | ||||||||||
5936 | |||||||||||
5937 | if (TSK == TSK_ExplicitInstantiationDeclaration) | ||||||||||
5938 | // Don't go any further if this is just an explicit instantiation | ||||||||||
5939 | // declaration. | ||||||||||
5940 | return; | ||||||||||
5941 | |||||||||||
5942 | // Add a context note to explain how we got to any diagnostics produced below. | ||||||||||
5943 | struct MarkingClassDllexported { | ||||||||||
5944 | Sema &S; | ||||||||||
5945 | MarkingClassDllexported(Sema &S, CXXRecordDecl *Class, | ||||||||||
5946 | SourceLocation AttrLoc) | ||||||||||
5947 | : S(S) { | ||||||||||
5948 | Sema::CodeSynthesisContext Ctx; | ||||||||||
5949 | Ctx.Kind = Sema::CodeSynthesisContext::MarkingClassDllexported; | ||||||||||
5950 | Ctx.PointOfInstantiation = AttrLoc; | ||||||||||
5951 | Ctx.Entity = Class; | ||||||||||
5952 | S.pushCodeSynthesisContext(Ctx); | ||||||||||
5953 | } | ||||||||||
5954 | ~MarkingClassDllexported() { | ||||||||||
5955 | S.popCodeSynthesisContext(); | ||||||||||
5956 | } | ||||||||||
5957 | } MarkingDllexportedContext(S, Class, ClassAttr->getLocation()); | ||||||||||
5958 | |||||||||||
5959 | if (S.Context.getTargetInfo().getTriple().isWindowsGNUEnvironment()) | ||||||||||
5960 | S.MarkVTableUsed(Class->getLocation(), Class, true); | ||||||||||
5961 | |||||||||||
5962 | for (Decl *Member : Class->decls()) { | ||||||||||
5963 | // Defined static variables that are members of an exported base | ||||||||||
5964 | // class must be marked export too. | ||||||||||
5965 | auto *VD = dyn_cast<VarDecl>(Member); | ||||||||||
5966 | if (VD && Member->getAttr<DLLExportAttr>() && | ||||||||||
5967 | VD->getStorageClass() == SC_Static && | ||||||||||
5968 | TSK == TSK_ImplicitInstantiation) | ||||||||||
5969 | S.MarkVariableReferenced(VD->getLocation(), VD); | ||||||||||
5970 | |||||||||||
5971 | auto *MD = dyn_cast<CXXMethodDecl>(Member); | ||||||||||
5972 | if (!MD) | ||||||||||
5973 | continue; | ||||||||||
5974 | |||||||||||
5975 | if (Member->getAttr<DLLExportAttr>()) { | ||||||||||
5976 | if (MD->isUserProvided()) { | ||||||||||
5977 | // Instantiate non-default class member functions ... | ||||||||||
5978 | |||||||||||
5979 | // .. except for certain kinds of template specializations. | ||||||||||
5980 | if (TSK == TSK_ImplicitInstantiation && !ClassAttr->isInherited()) | ||||||||||
5981 | continue; | ||||||||||
5982 | |||||||||||
5983 | S.MarkFunctionReferenced(Class->getLocation(), MD); | ||||||||||
5984 | |||||||||||
5985 | // The function will be passed to the consumer when its definition is | ||||||||||
5986 | // encountered. | ||||||||||
5987 | } else if (MD->isExplicitlyDefaulted()) { | ||||||||||
5988 | // Synthesize and instantiate explicitly defaulted methods. | ||||||||||
5989 | S.MarkFunctionReferenced(Class->getLocation(), MD); | ||||||||||
5990 | |||||||||||
5991 | if (TSK != TSK_ExplicitInstantiationDefinition) { | ||||||||||
5992 | // Except for explicit instantiation defs, we will not see the | ||||||||||
5993 | // definition again later, so pass it to the consumer now. | ||||||||||
5994 | S.Consumer.HandleTopLevelDecl(DeclGroupRef(MD)); | ||||||||||
5995 | } | ||||||||||
5996 | } else if (!MD->isTrivial() || | ||||||||||
5997 | MD->isCopyAssignmentOperator() || | ||||||||||
5998 | MD->isMoveAssignmentOperator()) { | ||||||||||
5999 | // Synthesize and instantiate non-trivial implicit methods, and the copy | ||||||||||
6000 | // and move assignment operators. The latter are exported even if they | ||||||||||
6001 | // are trivial, because the address of an operator can be taken and | ||||||||||
6002 | // should compare equal across libraries. | ||||||||||
6003 | S.MarkFunctionReferenced(Class->getLocation(), MD); | ||||||||||
6004 | |||||||||||
6005 | // There is no later point when we will see the definition of this | ||||||||||
6006 | // function, so pass it to the consumer now. | ||||||||||
6007 | S.Consumer.HandleTopLevelDecl(DeclGroupRef(MD)); | ||||||||||
6008 | } | ||||||||||
6009 | } | ||||||||||
6010 | } | ||||||||||
6011 | } | ||||||||||
6012 | |||||||||||
6013 | static void checkForMultipleExportedDefaultConstructors(Sema &S, | ||||||||||
6014 | CXXRecordDecl *Class) { | ||||||||||
6015 | // Only the MS ABI has default constructor closures, so we don't need to do | ||||||||||
6016 | // this semantic checking anywhere else. | ||||||||||
6017 | if (!S.Context.getTargetInfo().getCXXABI().isMicrosoft()) | ||||||||||
6018 | return; | ||||||||||
6019 | |||||||||||
6020 | CXXConstructorDecl *LastExportedDefaultCtor = nullptr; | ||||||||||
6021 | for (Decl *Member : Class->decls()) { | ||||||||||
6022 | // Look for exported default constructors. | ||||||||||
6023 | auto *CD = dyn_cast<CXXConstructorDecl>(Member); | ||||||||||
6024 | if (!CD || !CD->isDefaultConstructor()) | ||||||||||
6025 | continue; | ||||||||||
6026 | auto *Attr = CD->getAttr<DLLExportAttr>(); | ||||||||||
6027 | if (!Attr) | ||||||||||
6028 | continue; | ||||||||||
6029 | |||||||||||
6030 | // If the class is non-dependent, mark the default arguments as ODR-used so | ||||||||||
6031 | // that we can properly codegen the constructor closure. | ||||||||||
6032 | if (!Class->isDependentContext()) { | ||||||||||
6033 | for (ParmVarDecl *PD : CD->parameters()) { | ||||||||||
6034 | (void)S.CheckCXXDefaultArgExpr(Attr->getLocation(), CD, PD); | ||||||||||
6035 | S.DiscardCleanupsInEvaluationContext(); | ||||||||||
6036 | } | ||||||||||
6037 | } | ||||||||||
6038 | |||||||||||
6039 | if (LastExportedDefaultCtor) { | ||||||||||
6040 | S.Diag(LastExportedDefaultCtor->getLocation(), | ||||||||||
6041 | diag::err_attribute_dll_ambiguous_default_ctor) | ||||||||||
6042 | << Class; | ||||||||||
6043 | S.Diag(CD->getLocation(), diag::note_entity_declared_at) | ||||||||||
6044 | << CD->getDeclName(); | ||||||||||
6045 | return; | ||||||||||
6046 | } | ||||||||||
6047 | LastExportedDefaultCtor = CD; | ||||||||||
6048 | } | ||||||||||
6049 | } | ||||||||||
6050 | |||||||||||
6051 | static void checkCUDADeviceBuiltinSurfaceClassTemplate(Sema &S, | ||||||||||
6052 | CXXRecordDecl *Class) { | ||||||||||
6053 | bool ErrorReported = false; | ||||||||||
6054 | auto reportIllegalClassTemplate = [&ErrorReported](Sema &S, | ||||||||||
6055 | ClassTemplateDecl *TD) { | ||||||||||
6056 | if (ErrorReported) | ||||||||||
6057 | return; | ||||||||||
6058 | S.Diag(TD->getLocation(), | ||||||||||
6059 | diag::err_cuda_device_builtin_surftex_cls_template) | ||||||||||
6060 | << /*surface*/ 0 << TD; | ||||||||||
6061 | ErrorReported = true; | ||||||||||
6062 | }; | ||||||||||
6063 | |||||||||||
6064 | ClassTemplateDecl *TD = Class->getDescribedClassTemplate(); | ||||||||||
6065 | if (!TD) { | ||||||||||
6066 | auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(Class); | ||||||||||
6067 | if (!SD) { | ||||||||||
6068 | S.Diag(Class->getLocation(), | ||||||||||
6069 | diag::err_cuda_device_builtin_surftex_ref_decl) | ||||||||||
6070 | << /*surface*/ 0 << Class; | ||||||||||
6071 | S.Diag(Class->getLocation(), | ||||||||||
6072 | diag::note_cuda_device_builtin_surftex_should_be_template_class) | ||||||||||
6073 | << Class; | ||||||||||
6074 | return; | ||||||||||
6075 | } | ||||||||||
6076 | TD = SD->getSpecializedTemplate(); | ||||||||||
6077 | } | ||||||||||
6078 | |||||||||||
6079 | TemplateParameterList *Params = TD->getTemplateParameters(); | ||||||||||
6080 | unsigned N = Params->size(); | ||||||||||
6081 | |||||||||||
6082 | if (N != 2) { | ||||||||||
6083 | reportIllegalClassTemplate(S, TD); | ||||||||||
6084 | S.Diag(TD->getLocation(), | ||||||||||
6085 | diag::note_cuda_device_builtin_surftex_cls_should_have_n_args) | ||||||||||
6086 | << TD << 2; | ||||||||||
6087 | } | ||||||||||
6088 | if (N > 0 && !isa<TemplateTypeParmDecl>(Params->getParam(0))) { | ||||||||||
6089 | reportIllegalClassTemplate(S, TD); | ||||||||||
6090 | S.Diag(TD->getLocation(), | ||||||||||
6091 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||||||||
6092 | << TD << /*1st*/ 0 << /*type*/ 0; | ||||||||||
6093 | } | ||||||||||
6094 | if (N > 1) { | ||||||||||
6095 | auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Params->getParam(1)); | ||||||||||
6096 | if (!NTTP || !NTTP->getType()->isIntegralOrEnumerationType()) { | ||||||||||
6097 | reportIllegalClassTemplate(S, TD); | ||||||||||
6098 | S.Diag(TD->getLocation(), | ||||||||||
6099 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||||||||
6100 | << TD << /*2nd*/ 1 << /*integer*/ 1; | ||||||||||
6101 | } | ||||||||||
6102 | } | ||||||||||
6103 | } | ||||||||||
6104 | |||||||||||
6105 | static void checkCUDADeviceBuiltinTextureClassTemplate(Sema &S, | ||||||||||
6106 | CXXRecordDecl *Class) { | ||||||||||
6107 | bool ErrorReported = false; | ||||||||||
6108 | auto reportIllegalClassTemplate = [&ErrorReported](Sema &S, | ||||||||||
6109 | ClassTemplateDecl *TD) { | ||||||||||
6110 | if (ErrorReported) | ||||||||||
6111 | return; | ||||||||||
6112 | S.Diag(TD->getLocation(), | ||||||||||
6113 | diag::err_cuda_device_builtin_surftex_cls_template) | ||||||||||
6114 | << /*texture*/ 1 << TD; | ||||||||||
6115 | ErrorReported = true; | ||||||||||
6116 | }; | ||||||||||
6117 | |||||||||||
6118 | ClassTemplateDecl *TD = Class->getDescribedClassTemplate(); | ||||||||||
6119 | if (!TD) { | ||||||||||
6120 | auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(Class); | ||||||||||
6121 | if (!SD) { | ||||||||||
6122 | S.Diag(Class->getLocation(), | ||||||||||
6123 | diag::err_cuda_device_builtin_surftex_ref_decl) | ||||||||||
6124 | << /*texture*/ 1 << Class; | ||||||||||
6125 | S.Diag(Class->getLocation(), | ||||||||||
6126 | diag::note_cuda_device_builtin_surftex_should_be_template_class) | ||||||||||
6127 | << Class; | ||||||||||
6128 | return; | ||||||||||
6129 | } | ||||||||||
6130 | TD = SD->getSpecializedTemplate(); | ||||||||||
6131 | } | ||||||||||
6132 | |||||||||||
6133 | TemplateParameterList *Params = TD->getTemplateParameters(); | ||||||||||
6134 | unsigned N = Params->size(); | ||||||||||
6135 | |||||||||||
6136 | if (N != 3) { | ||||||||||
6137 | reportIllegalClassTemplate(S, TD); | ||||||||||
6138 | S.Diag(TD->getLocation(), | ||||||||||
6139 | diag::note_cuda_device_builtin_surftex_cls_should_have_n_args) | ||||||||||
6140 | << TD << 3; | ||||||||||
6141 | } | ||||||||||
6142 | if (N > 0 && !isa<TemplateTypeParmDecl>(Params->getParam(0))) { | ||||||||||
6143 | reportIllegalClassTemplate(S, TD); | ||||||||||
6144 | S.Diag(TD->getLocation(), | ||||||||||
6145 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||||||||
6146 | << TD << /*1st*/ 0 << /*type*/ 0; | ||||||||||
6147 | } | ||||||||||
6148 | if (N > 1) { | ||||||||||
6149 | auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Params->getParam(1)); | ||||||||||
6150 | if (!NTTP || !NTTP->getType()->isIntegralOrEnumerationType()) { | ||||||||||
6151 | reportIllegalClassTemplate(S, TD); | ||||||||||
6152 | S.Diag(TD->getLocation(), | ||||||||||
6153 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||||||||
6154 | << TD << /*2nd*/ 1 << /*integer*/ 1; | ||||||||||
6155 | } | ||||||||||
6156 | } | ||||||||||
6157 | if (N > 2) { | ||||||||||
6158 | auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Params->getParam(2)); | ||||||||||
6159 | if (!NTTP || !NTTP->getType()->isIntegralOrEnumerationType()) { | ||||||||||
6160 | reportIllegalClassTemplate(S, TD); | ||||||||||
6161 | S.Diag(TD->getLocation(), | ||||||||||
6162 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||||||||
6163 | << TD << /*3rd*/ 2 << /*integer*/ 1; | ||||||||||
6164 | } | ||||||||||
6165 | } | ||||||||||
6166 | } | ||||||||||
6167 | |||||||||||
6168 | void Sema::checkClassLevelCodeSegAttribute(CXXRecordDecl *Class) { | ||||||||||
6169 | // Mark any compiler-generated routines with the implicit code_seg attribute. | ||||||||||
6170 | for (auto *Method : Class->methods()) { | ||||||||||
6171 | if (Method->isUserProvided()) | ||||||||||
6172 | continue; | ||||||||||
6173 | if (Attr *A = getImplicitCodeSegOrSectionAttrForFunction(Method, /*IsDefinition=*/true)) | ||||||||||
6174 | Method->addAttr(A); | ||||||||||
6175 | } | ||||||||||
6176 | } | ||||||||||
6177 | |||||||||||
6178 | /// Check class-level dllimport/dllexport attribute. | ||||||||||
6179 | void Sema::checkClassLevelDLLAttribute(CXXRecordDecl *Class) { | ||||||||||
6180 | Attr *ClassAttr = getDLLAttr(Class); | ||||||||||
6181 | |||||||||||
6182 | // MSVC inherits DLL attributes to partial class template specializations. | ||||||||||
6183 | if (Context.getTargetInfo().shouldDLLImportComdatSymbols() && !ClassAttr) { | ||||||||||
6184 | if (auto *Spec = dyn_cast<ClassTemplatePartialSpecializationDecl>(Class)) { | ||||||||||
6185 | if (Attr *TemplateAttr = | ||||||||||
6186 | getDLLAttr(Spec->getSpecializedTemplate()->getTemplatedDecl())) { | ||||||||||
6187 | auto *A = cast<InheritableAttr>(TemplateAttr->clone(getASTContext())); | ||||||||||
6188 | A->setInherited(true); | ||||||||||
6189 | ClassAttr = A; | ||||||||||
6190 | } | ||||||||||
6191 | } | ||||||||||
6192 | } | ||||||||||
6193 | |||||||||||
6194 | if (!ClassAttr) | ||||||||||
6195 | return; | ||||||||||
6196 | |||||||||||
6197 | if (!Class->isExternallyVisible()) { | ||||||||||
6198 | Diag(Class->getLocation(), diag::err_attribute_dll_not_extern) | ||||||||||
6199 | << Class << ClassAttr; | ||||||||||
6200 | return; | ||||||||||
6201 | } | ||||||||||
6202 | |||||||||||
6203 | if (Context.getTargetInfo().shouldDLLImportComdatSymbols() && | ||||||||||
6204 | !ClassAttr->isInherited()) { | ||||||||||
6205 | // Diagnose dll attributes on members of class with dll attribute. | ||||||||||
6206 | for (Decl *Member : Class->decls()) { | ||||||||||
6207 | if (!isa<VarDecl>(Member) && !isa<CXXMethodDecl>(Member)) | ||||||||||
6208 | continue; | ||||||||||
6209 | InheritableAttr *MemberAttr = getDLLAttr(Member); | ||||||||||
6210 | if (!MemberAttr || MemberAttr->isInherited() || Member->isInvalidDecl()) | ||||||||||
6211 | continue; | ||||||||||
6212 | |||||||||||
6213 | Diag(MemberAttr->getLocation(), | ||||||||||
6214 | diag::err_attribute_dll_member_of_dll_class) | ||||||||||
6215 | << MemberAttr << ClassAttr; | ||||||||||
6216 | Diag(ClassAttr->getLocation(), diag::note_previous_attribute); | ||||||||||
6217 | Member->setInvalidDecl(); | ||||||||||
6218 | } | ||||||||||
6219 | } | ||||||||||
6220 | |||||||||||
6221 | if (Class->getDescribedClassTemplate()) | ||||||||||
6222 | // Don't inherit dll attribute until the template is instantiated. | ||||||||||
6223 | return; | ||||||||||
6224 | |||||||||||
6225 | // The class is either imported or exported. | ||||||||||
6226 | const bool ClassExported = ClassAttr->getKind() == attr::DLLExport; | ||||||||||
6227 | |||||||||||
6228 | // Check if this was a dllimport attribute propagated from a derived class to | ||||||||||
6229 | // a base class template specialization. We don't apply these attributes to | ||||||||||
6230 | // static data members. | ||||||||||
6231 | const bool PropagatedImport = | ||||||||||
6232 | !ClassExported && | ||||||||||
6233 | cast<DLLImportAttr>(ClassAttr)->wasPropagatedToBaseTemplate(); | ||||||||||
6234 | |||||||||||
6235 | TemplateSpecializationKind TSK = Class->getTemplateSpecializationKind(); | ||||||||||
6236 | |||||||||||
6237 | // Ignore explicit dllexport on explicit class template instantiation | ||||||||||
6238 | // declarations, except in MinGW mode. | ||||||||||
6239 | if (ClassExported && !ClassAttr->isInherited() && | ||||||||||
6240 | TSK == TSK_ExplicitInstantiationDeclaration && | ||||||||||
6241 | !Context.getTargetInfo().getTriple().isWindowsGNUEnvironment()) { | ||||||||||
6242 | Class->dropAttr<DLLExportAttr>(); | ||||||||||
6243 | return; | ||||||||||
6244 | } | ||||||||||
6245 | |||||||||||
6246 | // Force declaration of implicit members so they can inherit the attribute. | ||||||||||
6247 | ForceDeclarationOfImplicitMembers(Class); | ||||||||||
6248 | |||||||||||
6249 | // FIXME: MSVC's docs say all bases must be exportable, but this doesn't | ||||||||||
6250 | // seem to be true in practice? | ||||||||||
6251 | |||||||||||
6252 | for (Decl *Member : Class->decls()) { | ||||||||||
6253 | VarDecl *VD = dyn_cast<VarDecl>(Member); | ||||||||||
6254 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Member); | ||||||||||
6255 | |||||||||||
6256 | // Only methods and static fields inherit the attributes. | ||||||||||
6257 | if (!VD && !MD) | ||||||||||
6258 | continue; | ||||||||||
6259 | |||||||||||
6260 | if (MD) { | ||||||||||
6261 | // Don't process deleted methods. | ||||||||||
6262 | if (MD->isDeleted()) | ||||||||||
6263 | continue; | ||||||||||
6264 | |||||||||||
6265 | if (MD->isInlined()) { | ||||||||||
6266 | // MinGW does not import or export inline methods. But do it for | ||||||||||
6267 | // template instantiations. | ||||||||||
6268 | if (!Context.getTargetInfo().shouldDLLImportComdatSymbols() && | ||||||||||
6269 | TSK != TSK_ExplicitInstantiationDeclaration && | ||||||||||
6270 | TSK != TSK_ExplicitInstantiationDefinition) | ||||||||||
6271 | continue; | ||||||||||
6272 | |||||||||||
6273 | // MSVC versions before 2015 don't export the move assignment operators | ||||||||||
6274 | // and move constructor, so don't attempt to import/export them if | ||||||||||
6275 | // we have a definition. | ||||||||||
6276 | auto *Ctor = dyn_cast<CXXConstructorDecl>(MD); | ||||||||||
6277 | if ((MD->isMoveAssignmentOperator() || | ||||||||||
6278 | (Ctor && Ctor->isMoveConstructor())) && | ||||||||||
6279 | !getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015)) | ||||||||||
6280 | continue; | ||||||||||
6281 | |||||||||||
6282 | // MSVC2015 doesn't export trivial defaulted x-tor but copy assign | ||||||||||
6283 | // operator is exported anyway. | ||||||||||
6284 | if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||||||||
6285 | (Ctor || isa<CXXDestructorDecl>(MD)) && MD->isTrivial()) | ||||||||||
6286 | continue; | ||||||||||
6287 | } | ||||||||||
6288 | } | ||||||||||
6289 | |||||||||||
6290 | // Don't apply dllimport attributes to static data members of class template | ||||||||||
6291 | // instantiations when the attribute is propagated from a derived class. | ||||||||||
6292 | if (VD && PropagatedImport) | ||||||||||
6293 | continue; | ||||||||||
6294 | |||||||||||
6295 | if (!cast<NamedDecl>(Member)->isExternallyVisible()) | ||||||||||
6296 | continue; | ||||||||||
6297 | |||||||||||
6298 | if (!getDLLAttr(Member)) { | ||||||||||
6299 | InheritableAttr *NewAttr = nullptr; | ||||||||||
6300 | |||||||||||
6301 | // Do not export/import inline function when -fno-dllexport-inlines is | ||||||||||
6302 | // passed. But add attribute for later local static var check. | ||||||||||
6303 | if (!getLangOpts().DllExportInlines && MD && MD->isInlined() && | ||||||||||
6304 | TSK != TSK_ExplicitInstantiationDeclaration && | ||||||||||
6305 | TSK != TSK_ExplicitInstantiationDefinition) { | ||||||||||
6306 | if (ClassExported) { | ||||||||||
6307 | NewAttr = ::new (getASTContext()) | ||||||||||
6308 | DLLExportStaticLocalAttr(getASTContext(), *ClassAttr); | ||||||||||
6309 | } else { | ||||||||||
6310 | NewAttr = ::new (getASTContext()) | ||||||||||
6311 | DLLImportStaticLocalAttr(getASTContext(), *ClassAttr); | ||||||||||
6312 | } | ||||||||||
6313 | } else { | ||||||||||
6314 | NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||||||||
6315 | } | ||||||||||
6316 | |||||||||||
6317 | NewAttr->setInherited(true); | ||||||||||
6318 | Member->addAttr(NewAttr); | ||||||||||
6319 | |||||||||||
6320 | if (MD) { | ||||||||||
6321 | // Propagate DLLAttr to friend re-declarations of MD that have already | ||||||||||
6322 | // been constructed. | ||||||||||
6323 | for (FunctionDecl *FD = MD->getMostRecentDecl(); FD; | ||||||||||
6324 | FD = FD->getPreviousDecl()) { | ||||||||||
6325 | if (FD->getFriendObjectKind() == Decl::FOK_None) | ||||||||||
6326 | continue; | ||||||||||
6327 | assert(!getDLLAttr(FD) &&(static_cast <bool> (!getDLLAttr(FD) && "friend re-decl should not already have a DLLAttr" ) ? void (0) : __assert_fail ("!getDLLAttr(FD) && \"friend re-decl should not already have a DLLAttr\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 6328, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
6328 | "friend re-decl should not already have a DLLAttr")(static_cast <bool> (!getDLLAttr(FD) && "friend re-decl should not already have a DLLAttr" ) ? void (0) : __assert_fail ("!getDLLAttr(FD) && \"friend re-decl should not already have a DLLAttr\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 6328, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
6329 | NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||||||||
6330 | NewAttr->setInherited(true); | ||||||||||
6331 | FD->addAttr(NewAttr); | ||||||||||
6332 | } | ||||||||||
6333 | } | ||||||||||
6334 | } | ||||||||||
6335 | } | ||||||||||
6336 | |||||||||||
6337 | if (ClassExported) | ||||||||||
6338 | DelayedDllExportClasses.push_back(Class); | ||||||||||
6339 | } | ||||||||||
6340 | |||||||||||
6341 | /// Perform propagation of DLL attributes from a derived class to a | ||||||||||
6342 | /// templated base class for MS compatibility. | ||||||||||
6343 | void Sema::propagateDLLAttrToBaseClassTemplate( | ||||||||||
6344 | CXXRecordDecl *Class, Attr *ClassAttr, | ||||||||||
6345 | ClassTemplateSpecializationDecl *BaseTemplateSpec, SourceLocation BaseLoc) { | ||||||||||
6346 | if (getDLLAttr( | ||||||||||
6347 | BaseTemplateSpec->getSpecializedTemplate()->getTemplatedDecl())) { | ||||||||||
6348 | // If the base class template has a DLL attribute, don't try to change it. | ||||||||||
6349 | return; | ||||||||||
6350 | } | ||||||||||
6351 | |||||||||||
6352 | auto TSK = BaseTemplateSpec->getSpecializationKind(); | ||||||||||
6353 | if (!getDLLAttr(BaseTemplateSpec) && | ||||||||||
6354 | (TSK == TSK_Undeclared || TSK == TSK_ExplicitInstantiationDeclaration || | ||||||||||
6355 | TSK == TSK_ImplicitInstantiation)) { | ||||||||||
6356 | // The template hasn't been instantiated yet (or it has, but only as an | ||||||||||
6357 | // explicit instantiation declaration or implicit instantiation, which means | ||||||||||
6358 | // we haven't codegenned any members yet), so propagate the attribute. | ||||||||||
6359 | auto *NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||||||||
6360 | NewAttr->setInherited(true); | ||||||||||
6361 | BaseTemplateSpec->addAttr(NewAttr); | ||||||||||
6362 | |||||||||||
6363 | // If this was an import, mark that we propagated it from a derived class to | ||||||||||
6364 | // a base class template specialization. | ||||||||||
6365 | if (auto *ImportAttr = dyn_cast<DLLImportAttr>(NewAttr)) | ||||||||||
6366 | ImportAttr->setPropagatedToBaseTemplate(); | ||||||||||
6367 | |||||||||||
6368 | // If the template is already instantiated, checkDLLAttributeRedeclaration() | ||||||||||
6369 | // needs to be run again to work see the new attribute. Otherwise this will | ||||||||||
6370 | // get run whenever the template is instantiated. | ||||||||||
6371 | if (TSK != TSK_Undeclared) | ||||||||||
6372 | checkClassLevelDLLAttribute(BaseTemplateSpec); | ||||||||||
6373 | |||||||||||
6374 | return; | ||||||||||
6375 | } | ||||||||||
6376 | |||||||||||
6377 | if (getDLLAttr(BaseTemplateSpec)) { | ||||||||||
6378 | // The template has already been specialized or instantiated with an | ||||||||||
6379 | // attribute, explicitly or through propagation. We should not try to change | ||||||||||
6380 | // it. | ||||||||||
6381 | return; | ||||||||||
6382 | } | ||||||||||
6383 | |||||||||||
6384 | // The template was previously instantiated or explicitly specialized without | ||||||||||
6385 | // a dll attribute, It's too late for us to add an attribute, so warn that | ||||||||||
6386 | // this is unsupported. | ||||||||||
6387 | Diag(BaseLoc, diag::warn_attribute_dll_instantiated_base_class) | ||||||||||
6388 | << BaseTemplateSpec->isExplicitSpecialization(); | ||||||||||
6389 | Diag(ClassAttr->getLocation(), diag::note_attribute); | ||||||||||
6390 | if (BaseTemplateSpec->isExplicitSpecialization()) { | ||||||||||
6391 | Diag(BaseTemplateSpec->getLocation(), | ||||||||||
6392 | diag::note_template_class_explicit_specialization_was_here) | ||||||||||
6393 | << BaseTemplateSpec; | ||||||||||
6394 | } else { | ||||||||||
6395 | Diag(BaseTemplateSpec->getPointOfInstantiation(), | ||||||||||
6396 | diag::note_template_class_instantiation_was_here) | ||||||||||
6397 | << BaseTemplateSpec; | ||||||||||
6398 | } | ||||||||||
6399 | } | ||||||||||
6400 | |||||||||||
6401 | /// Determine the kind of defaulting that would be done for a given function. | ||||||||||
6402 | /// | ||||||||||
6403 | /// If the function is both a default constructor and a copy / move constructor | ||||||||||
6404 | /// (due to having a default argument for the first parameter), this picks | ||||||||||
6405 | /// CXXDefaultConstructor. | ||||||||||
6406 | /// | ||||||||||
6407 | /// FIXME: Check that case is properly handled by all callers. | ||||||||||
6408 | Sema::DefaultedFunctionKind | ||||||||||
6409 | Sema::getDefaultedFunctionKind(const FunctionDecl *FD) { | ||||||||||
6410 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||||||
6411 | if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(FD)) { | ||||||||||
6412 | if (Ctor->isDefaultConstructor()) | ||||||||||
6413 | return Sema::CXXDefaultConstructor; | ||||||||||
6414 | |||||||||||
6415 | if (Ctor->isCopyConstructor()) | ||||||||||
6416 | return Sema::CXXCopyConstructor; | ||||||||||
6417 | |||||||||||
6418 | if (Ctor->isMoveConstructor()) | ||||||||||
6419 | return Sema::CXXMoveConstructor; | ||||||||||
6420 | } | ||||||||||
6421 | |||||||||||
6422 | if (MD->isCopyAssignmentOperator()) | ||||||||||
6423 | return Sema::CXXCopyAssignment; | ||||||||||
6424 | |||||||||||
6425 | if (MD->isMoveAssignmentOperator()) | ||||||||||
6426 | return Sema::CXXMoveAssignment; | ||||||||||
6427 | |||||||||||
6428 | if (isa<CXXDestructorDecl>(FD)) | ||||||||||
6429 | return Sema::CXXDestructor; | ||||||||||
6430 | } | ||||||||||
6431 | |||||||||||
6432 | switch (FD->getDeclName().getCXXOverloadedOperator()) { | ||||||||||
6433 | case OO_EqualEqual: | ||||||||||
6434 | return DefaultedComparisonKind::Equal; | ||||||||||
6435 | |||||||||||
6436 | case OO_ExclaimEqual: | ||||||||||
6437 | return DefaultedComparisonKind::NotEqual; | ||||||||||
6438 | |||||||||||
6439 | case OO_Spaceship: | ||||||||||
6440 | // No point allowing this if <=> doesn't exist in the current language mode. | ||||||||||
6441 | if (!getLangOpts().CPlusPlus20) | ||||||||||
6442 | break; | ||||||||||
6443 | return DefaultedComparisonKind::ThreeWay; | ||||||||||
6444 | |||||||||||
6445 | case OO_Less: | ||||||||||
6446 | case OO_LessEqual: | ||||||||||
6447 | case OO_Greater: | ||||||||||
6448 | case OO_GreaterEqual: | ||||||||||
6449 | // No point allowing this if <=> doesn't exist in the current language mode. | ||||||||||
6450 | if (!getLangOpts().CPlusPlus20) | ||||||||||
6451 | break; | ||||||||||
6452 | return DefaultedComparisonKind::Relational; | ||||||||||
6453 | |||||||||||
6454 | default: | ||||||||||
6455 | break; | ||||||||||
6456 | } | ||||||||||
6457 | |||||||||||
6458 | // Not defaultable. | ||||||||||
6459 | return DefaultedFunctionKind(); | ||||||||||
6460 | } | ||||||||||
6461 | |||||||||||
6462 | static void DefineDefaultedFunction(Sema &S, FunctionDecl *FD, | ||||||||||
6463 | SourceLocation DefaultLoc) { | ||||||||||
6464 | Sema::DefaultedFunctionKind DFK = S.getDefaultedFunctionKind(FD); | ||||||||||
6465 | if (DFK.isComparison()) | ||||||||||
6466 | return S.DefineDefaultedComparison(DefaultLoc, FD, DFK.asComparison()); | ||||||||||
6467 | |||||||||||
6468 | switch (DFK.asSpecialMember()) { | ||||||||||
6469 | case Sema::CXXDefaultConstructor: | ||||||||||
6470 | S.DefineImplicitDefaultConstructor(DefaultLoc, | ||||||||||
6471 | cast<CXXConstructorDecl>(FD)); | ||||||||||
6472 | break; | ||||||||||
6473 | case Sema::CXXCopyConstructor: | ||||||||||
6474 | S.DefineImplicitCopyConstructor(DefaultLoc, cast<CXXConstructorDecl>(FD)); | ||||||||||
6475 | break; | ||||||||||
6476 | case Sema::CXXCopyAssignment: | ||||||||||
6477 | S.DefineImplicitCopyAssignment(DefaultLoc, cast<CXXMethodDecl>(FD)); | ||||||||||
6478 | break; | ||||||||||
6479 | case Sema::CXXDestructor: | ||||||||||
6480 | S.DefineImplicitDestructor(DefaultLoc, cast<CXXDestructorDecl>(FD)); | ||||||||||
6481 | break; | ||||||||||
6482 | case Sema::CXXMoveConstructor: | ||||||||||
6483 | S.DefineImplicitMoveConstructor(DefaultLoc, cast<CXXConstructorDecl>(FD)); | ||||||||||
6484 | break; | ||||||||||
6485 | case Sema::CXXMoveAssignment: | ||||||||||
6486 | S.DefineImplicitMoveAssignment(DefaultLoc, cast<CXXMethodDecl>(FD)); | ||||||||||
6487 | break; | ||||||||||
6488 | case Sema::CXXInvalid: | ||||||||||
6489 | llvm_unreachable("Invalid special member.")::llvm::llvm_unreachable_internal("Invalid special member.", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 6489); | ||||||||||
6490 | } | ||||||||||
6491 | } | ||||||||||
6492 | |||||||||||
6493 | /// Determine whether a type is permitted to be passed or returned in | ||||||||||
6494 | /// registers, per C++ [class.temporary]p3. | ||||||||||
6495 | static bool canPassInRegisters(Sema &S, CXXRecordDecl *D, | ||||||||||
6496 | TargetInfo::CallingConvKind CCK) { | ||||||||||
6497 | if (D->isDependentType() || D->isInvalidDecl()) | ||||||||||
6498 | return false; | ||||||||||
6499 | |||||||||||
6500 | // Clang <= 4 used the pre-C++11 rule, which ignores move operations. | ||||||||||
6501 | // The PS4 platform ABI follows the behavior of Clang 3.2. | ||||||||||
6502 | if (CCK == TargetInfo::CCK_ClangABI4OrPS4) | ||||||||||
6503 | return !D->hasNonTrivialDestructorForCall() && | ||||||||||
6504 | !D->hasNonTrivialCopyConstructorForCall(); | ||||||||||
6505 | |||||||||||
6506 | if (CCK == TargetInfo::CCK_MicrosoftWin64) { | ||||||||||
6507 | bool CopyCtorIsTrivial = false, CopyCtorIsTrivialForCall = false; | ||||||||||
6508 | bool DtorIsTrivialForCall = false; | ||||||||||
6509 | |||||||||||
6510 | // If a class has at least one non-deleted, trivial copy constructor, it | ||||||||||
6511 | // is passed according to the C ABI. Otherwise, it is passed indirectly. | ||||||||||
6512 | // | ||||||||||
6513 | // Note: This permits classes with non-trivial copy or move ctors to be | ||||||||||
6514 | // passed in registers, so long as they *also* have a trivial copy ctor, | ||||||||||
6515 | // which is non-conforming. | ||||||||||
6516 | if (D->needsImplicitCopyConstructor()) { | ||||||||||
6517 | if (!D->defaultedCopyConstructorIsDeleted()) { | ||||||||||
6518 | if (D->hasTrivialCopyConstructor()) | ||||||||||
6519 | CopyCtorIsTrivial = true; | ||||||||||
6520 | if (D->hasTrivialCopyConstructorForCall()) | ||||||||||
6521 | CopyCtorIsTrivialForCall = true; | ||||||||||
6522 | } | ||||||||||
6523 | } else { | ||||||||||
6524 | for (const CXXConstructorDecl *CD : D->ctors()) { | ||||||||||
6525 | if (CD->isCopyConstructor() && !CD->isDeleted()) { | ||||||||||
6526 | if (CD->isTrivial()) | ||||||||||
6527 | CopyCtorIsTrivial = true; | ||||||||||
6528 | if (CD->isTrivialForCall()) | ||||||||||
6529 | CopyCtorIsTrivialForCall = true; | ||||||||||
6530 | } | ||||||||||
6531 | } | ||||||||||
6532 | } | ||||||||||
6533 | |||||||||||
6534 | if (D->needsImplicitDestructor()) { | ||||||||||
6535 | if (!D->defaultedDestructorIsDeleted() && | ||||||||||
6536 | D->hasTrivialDestructorForCall()) | ||||||||||
6537 | DtorIsTrivialForCall = true; | ||||||||||
6538 | } else if (const auto *DD = D->getDestructor()) { | ||||||||||
6539 | if (!DD->isDeleted() && DD->isTrivialForCall()) | ||||||||||
6540 | DtorIsTrivialForCall = true; | ||||||||||
6541 | } | ||||||||||
6542 | |||||||||||
6543 | // If the copy ctor and dtor are both trivial-for-calls, pass direct. | ||||||||||
6544 | if (CopyCtorIsTrivialForCall && DtorIsTrivialForCall) | ||||||||||
6545 | return true; | ||||||||||
6546 | |||||||||||
6547 | // If a class has a destructor, we'd really like to pass it indirectly | ||||||||||
6548 | // because it allows us to elide copies. Unfortunately, MSVC makes that | ||||||||||
6549 | // impossible for small types, which it will pass in a single register or | ||||||||||
6550 | // stack slot. Most objects with dtors are large-ish, so handle that early. | ||||||||||
6551 | // We can't call out all large objects as being indirect because there are | ||||||||||
6552 | // multiple x64 calling conventions and the C++ ABI code shouldn't dictate | ||||||||||
6553 | // how we pass large POD types. | ||||||||||
6554 | |||||||||||
6555 | // Note: This permits small classes with nontrivial destructors to be | ||||||||||
6556 | // passed in registers, which is non-conforming. | ||||||||||
6557 | bool isAArch64 = S.Context.getTargetInfo().getTriple().isAArch64(); | ||||||||||
6558 | uint64_t TypeSize = isAArch64 ? 128 : 64; | ||||||||||
6559 | |||||||||||
6560 | if (CopyCtorIsTrivial && | ||||||||||
6561 | S.getASTContext().getTypeSize(D->getTypeForDecl()) <= TypeSize) | ||||||||||
6562 | return true; | ||||||||||
6563 | return false; | ||||||||||
6564 | } | ||||||||||
6565 | |||||||||||
6566 | // Per C++ [class.temporary]p3, the relevant condition is: | ||||||||||
6567 | // each copy constructor, move constructor, and destructor of X is | ||||||||||
6568 | // either trivial or deleted, and X has at least one non-deleted copy | ||||||||||
6569 | // or move constructor | ||||||||||
6570 | bool HasNonDeletedCopyOrMove = false; | ||||||||||
6571 | |||||||||||
6572 | if (D->needsImplicitCopyConstructor() && | ||||||||||
6573 | !D->defaultedCopyConstructorIsDeleted()) { | ||||||||||
6574 | if (!D->hasTrivialCopyConstructorForCall()) | ||||||||||
6575 | return false; | ||||||||||
6576 | HasNonDeletedCopyOrMove = true; | ||||||||||
6577 | } | ||||||||||
6578 | |||||||||||
6579 | if (S.getLangOpts().CPlusPlus11 && D->needsImplicitMoveConstructor() && | ||||||||||
6580 | !D->defaultedMoveConstructorIsDeleted()) { | ||||||||||
6581 | if (!D->hasTrivialMoveConstructorForCall()) | ||||||||||
6582 | return false; | ||||||||||
6583 | HasNonDeletedCopyOrMove = true; | ||||||||||
6584 | } | ||||||||||
6585 | |||||||||||
6586 | if (D->needsImplicitDestructor() && !D->defaultedDestructorIsDeleted() && | ||||||||||
6587 | !D->hasTrivialDestructorForCall()) | ||||||||||
6588 | return false; | ||||||||||
6589 | |||||||||||
6590 | for (const CXXMethodDecl *MD : D->methods()) { | ||||||||||
6591 | if (MD->isDeleted()) | ||||||||||
6592 | continue; | ||||||||||
6593 | |||||||||||
6594 | auto *CD = dyn_cast<CXXConstructorDecl>(MD); | ||||||||||
6595 | if (CD && CD->isCopyOrMoveConstructor()) | ||||||||||
6596 | HasNonDeletedCopyOrMove = true; | ||||||||||
6597 | else if (!isa<CXXDestructorDecl>(MD)) | ||||||||||
6598 | continue; | ||||||||||
6599 | |||||||||||
6600 | if (!MD->isTrivialForCall()) | ||||||||||
6601 | return false; | ||||||||||
6602 | } | ||||||||||
6603 | |||||||||||
6604 | return HasNonDeletedCopyOrMove; | ||||||||||
6605 | } | ||||||||||
6606 | |||||||||||
6607 | /// Report an error regarding overriding, along with any relevant | ||||||||||
6608 | /// overridden methods. | ||||||||||
6609 | /// | ||||||||||
6610 | /// \param DiagID the primary error to report. | ||||||||||
6611 | /// \param MD the overriding method. | ||||||||||
6612 | static bool | ||||||||||
6613 | ReportOverrides(Sema &S, unsigned DiagID, const CXXMethodDecl *MD, | ||||||||||
6614 | llvm::function_ref<bool(const CXXMethodDecl *)> Report) { | ||||||||||
6615 | bool IssuedDiagnostic = false; | ||||||||||
6616 | for (const CXXMethodDecl *O : MD->overridden_methods()) { | ||||||||||
6617 | if (Report(O)) { | ||||||||||
6618 | if (!IssuedDiagnostic) { | ||||||||||
6619 | S.Diag(MD->getLocation(), DiagID) << MD->getDeclName(); | ||||||||||
6620 | IssuedDiagnostic = true; | ||||||||||
6621 | } | ||||||||||
6622 | S.Diag(O->getLocation(), diag::note_overridden_virtual_function); | ||||||||||
6623 | } | ||||||||||
6624 | } | ||||||||||
6625 | return IssuedDiagnostic; | ||||||||||
6626 | } | ||||||||||
6627 | |||||||||||
6628 | /// Perform semantic checks on a class definition that has been | ||||||||||
6629 | /// completing, introducing implicitly-declared members, checking for | ||||||||||
6630 | /// abstract types, etc. | ||||||||||
6631 | /// | ||||||||||
6632 | /// \param S The scope in which the class was parsed. Null if we didn't just | ||||||||||
6633 | /// parse a class definition. | ||||||||||
6634 | /// \param Record The completed class. | ||||||||||
6635 | void Sema::CheckCompletedCXXClass(Scope *S, CXXRecordDecl *Record) { | ||||||||||
6636 | if (!Record) | ||||||||||
6637 | return; | ||||||||||
6638 | |||||||||||
6639 | if (Record->isAbstract() && !Record->isInvalidDecl()) { | ||||||||||
6640 | AbstractUsageInfo Info(*this, Record); | ||||||||||
6641 | CheckAbstractClassUsage(Info, Record); | ||||||||||
6642 | } | ||||||||||
6643 | |||||||||||
6644 | // If this is not an aggregate type and has no user-declared constructor, | ||||||||||
6645 | // complain about any non-static data members of reference or const scalar | ||||||||||
6646 | // type, since they will never get initializers. | ||||||||||
6647 | if (!Record->isInvalidDecl() && !Record->isDependentType() && | ||||||||||
6648 | !Record->isAggregate() && !Record->hasUserDeclaredConstructor() && | ||||||||||
6649 | !Record->isLambda()) { | ||||||||||
6650 | bool Complained = false; | ||||||||||
6651 | for (const auto *F : Record->fields()) { | ||||||||||
6652 | if (F->hasInClassInitializer() || F->isUnnamedBitfield()) | ||||||||||
6653 | continue; | ||||||||||
6654 | |||||||||||
6655 | if (F->getType()->isReferenceType() || | ||||||||||
6656 | (F->getType().isConstQualified() && F->getType()->isScalarType())) { | ||||||||||
6657 | if (!Complained) { | ||||||||||
6658 | Diag(Record->getLocation(), diag::warn_no_constructor_for_refconst) | ||||||||||
6659 | << Record->getTagKind() << Record; | ||||||||||
6660 | Complained = true; | ||||||||||
6661 | } | ||||||||||
6662 | |||||||||||
6663 | Diag(F->getLocation(), diag::note_refconst_member_not_initialized) | ||||||||||
6664 | << F->getType()->isReferenceType() | ||||||||||
6665 | << F->getDeclName(); | ||||||||||
6666 | } | ||||||||||
6667 | } | ||||||||||
6668 | } | ||||||||||
6669 | |||||||||||
6670 | if (Record->getIdentifier()) { | ||||||||||
6671 | // C++ [class.mem]p13: | ||||||||||
6672 | // If T is the name of a class, then each of the following shall have a | ||||||||||
6673 | // name different from T: | ||||||||||
6674 | // - every member of every anonymous union that is a member of class T. | ||||||||||
6675 | // | ||||||||||
6676 | // C++ [class.mem]p14: | ||||||||||
6677 | // In addition, if class T has a user-declared constructor (12.1), every | ||||||||||
6678 | // non-static data member of class T shall have a name different from T. | ||||||||||
6679 | DeclContext::lookup_result R = Record->lookup(Record->getDeclName()); | ||||||||||
6680 | for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; | ||||||||||
6681 | ++I) { | ||||||||||
6682 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||||||||
6683 | if (((isa<FieldDecl>(D) || isa<UnresolvedUsingValueDecl>(D)) && | ||||||||||
6684 | Record->hasUserDeclaredConstructor()) || | ||||||||||
6685 | isa<IndirectFieldDecl>(D)) { | ||||||||||
6686 | Diag((*I)->getLocation(), diag::err_member_name_of_class) | ||||||||||
6687 | << D->getDeclName(); | ||||||||||
6688 | break; | ||||||||||
6689 | } | ||||||||||
6690 | } | ||||||||||
6691 | } | ||||||||||
6692 | |||||||||||
6693 | // Warn if the class has virtual methods but non-virtual public destructor. | ||||||||||
6694 | if (Record->isPolymorphic() && !Record->isDependentType()) { | ||||||||||
6695 | CXXDestructorDecl *dtor = Record->getDestructor(); | ||||||||||
6696 | if ((!dtor || (!dtor->isVirtual() && dtor->getAccess() == AS_public)) && | ||||||||||
6697 | !Record->hasAttr<FinalAttr>()) | ||||||||||
6698 | Diag(dtor ? dtor->getLocation() : Record->getLocation(), | ||||||||||
6699 | diag::warn_non_virtual_dtor) << Context.getRecordType(Record); | ||||||||||
6700 | } | ||||||||||
6701 | |||||||||||
6702 | if (Record->isAbstract()) { | ||||||||||
6703 | if (FinalAttr *FA = Record->getAttr<FinalAttr>()) { | ||||||||||
6704 | Diag(Record->getLocation(), diag::warn_abstract_final_class) | ||||||||||
6705 | << FA->isSpelledAsSealed(); | ||||||||||
6706 | DiagnoseAbstractType(Record); | ||||||||||
6707 | } | ||||||||||
6708 | } | ||||||||||
6709 | |||||||||||
6710 | // Warn if the class has a final destructor but is not itself marked final. | ||||||||||
6711 | if (!Record->hasAttr<FinalAttr>()) { | ||||||||||
6712 | if (const CXXDestructorDecl *dtor = Record->getDestructor()) { | ||||||||||
6713 | if (const FinalAttr *FA = dtor->getAttr<FinalAttr>()) { | ||||||||||
6714 | Diag(FA->getLocation(), diag::warn_final_dtor_non_final_class) | ||||||||||
6715 | << FA->isSpelledAsSealed() | ||||||||||
6716 | << FixItHint::CreateInsertion( | ||||||||||
6717 | getLocForEndOfToken(Record->getLocation()), | ||||||||||
6718 | (FA->isSpelledAsSealed() ? " sealed" : " final")); | ||||||||||
6719 | Diag(Record->getLocation(), | ||||||||||
6720 | diag::note_final_dtor_non_final_class_silence) | ||||||||||
6721 | << Context.getRecordType(Record) << FA->isSpelledAsSealed(); | ||||||||||
6722 | } | ||||||||||
6723 | } | ||||||||||
6724 | } | ||||||||||
6725 | |||||||||||
6726 | // See if trivial_abi has to be dropped. | ||||||||||
6727 | if (Record->hasAttr<TrivialABIAttr>()) | ||||||||||
6728 | checkIllFormedTrivialABIStruct(*Record); | ||||||||||
6729 | |||||||||||
6730 | // Set HasTrivialSpecialMemberForCall if the record has attribute | ||||||||||
6731 | // "trivial_abi". | ||||||||||
6732 | bool HasTrivialABI = Record->hasAttr<TrivialABIAttr>(); | ||||||||||
6733 | |||||||||||
6734 | if (HasTrivialABI) | ||||||||||
6735 | Record->setHasTrivialSpecialMemberForCall(); | ||||||||||
6736 | |||||||||||
6737 | // Explicitly-defaulted secondary comparison functions (!=, <, <=, >, >=). | ||||||||||
6738 | // We check these last because they can depend on the properties of the | ||||||||||
6739 | // primary comparison functions (==, <=>). | ||||||||||
6740 | llvm::SmallVector<FunctionDecl*, 5> DefaultedSecondaryComparisons; | ||||||||||
6741 | |||||||||||
6742 | // Perform checks that can't be done until we know all the properties of a | ||||||||||
6743 | // member function (whether it's defaulted, deleted, virtual, overriding, | ||||||||||
6744 | // ...). | ||||||||||
6745 | auto CheckCompletedMemberFunction = [&](CXXMethodDecl *MD) { | ||||||||||
6746 | // A static function cannot override anything. | ||||||||||
6747 | if (MD->getStorageClass() == SC_Static) { | ||||||||||
6748 | if (ReportOverrides(*this, diag::err_static_overrides_virtual, MD, | ||||||||||
6749 | [](const CXXMethodDecl *) { return true; })) | ||||||||||
6750 | return; | ||||||||||
6751 | } | ||||||||||
6752 | |||||||||||
6753 | // A deleted function cannot override a non-deleted function and vice | ||||||||||
6754 | // versa. | ||||||||||
6755 | if (ReportOverrides(*this, | ||||||||||
6756 | MD->isDeleted() ? diag::err_deleted_override | ||||||||||
6757 | : diag::err_non_deleted_override, | ||||||||||
6758 | MD, [&](const CXXMethodDecl *V) { | ||||||||||
6759 | return MD->isDeleted() != V->isDeleted(); | ||||||||||
6760 | })) { | ||||||||||
6761 | if (MD->isDefaulted() && MD->isDeleted()) | ||||||||||
6762 | // Explain why this defaulted function was deleted. | ||||||||||
6763 | DiagnoseDeletedDefaultedFunction(MD); | ||||||||||
6764 | return; | ||||||||||
6765 | } | ||||||||||
6766 | |||||||||||
6767 | // A consteval function cannot override a non-consteval function and vice | ||||||||||
6768 | // versa. | ||||||||||
6769 | if (ReportOverrides(*this, | ||||||||||
6770 | MD->isConsteval() ? diag::err_consteval_override | ||||||||||
6771 | : diag::err_non_consteval_override, | ||||||||||
6772 | MD, [&](const CXXMethodDecl *V) { | ||||||||||
6773 | return MD->isConsteval() != V->isConsteval(); | ||||||||||
6774 | })) { | ||||||||||
6775 | if (MD->isDefaulted() && MD->isDeleted()) | ||||||||||
6776 | // Explain why this defaulted function was deleted. | ||||||||||
6777 | DiagnoseDeletedDefaultedFunction(MD); | ||||||||||
6778 | return; | ||||||||||
6779 | } | ||||||||||
6780 | }; | ||||||||||
6781 | |||||||||||
6782 | auto CheckForDefaultedFunction = [&](FunctionDecl *FD) -> bool { | ||||||||||
6783 | if (!FD || FD->isInvalidDecl() || !FD->isExplicitlyDefaulted()) | ||||||||||
6784 | return false; | ||||||||||
6785 | |||||||||||
6786 | DefaultedFunctionKind DFK = getDefaultedFunctionKind(FD); | ||||||||||
6787 | if (DFK.asComparison() == DefaultedComparisonKind::NotEqual || | ||||||||||
6788 | DFK.asComparison() == DefaultedComparisonKind::Relational) { | ||||||||||
6789 | DefaultedSecondaryComparisons.push_back(FD); | ||||||||||
6790 | return true; | ||||||||||
6791 | } | ||||||||||
6792 | |||||||||||
6793 | CheckExplicitlyDefaultedFunction(S, FD); | ||||||||||
6794 | return false; | ||||||||||
6795 | }; | ||||||||||
6796 | |||||||||||
6797 | auto CompleteMemberFunction = [&](CXXMethodDecl *M) { | ||||||||||
6798 | // Check whether the explicitly-defaulted members are valid. | ||||||||||
6799 | bool Incomplete = CheckForDefaultedFunction(M); | ||||||||||
6800 | |||||||||||
6801 | // Skip the rest of the checks for a member of a dependent class. | ||||||||||
6802 | if (Record->isDependentType()) | ||||||||||
6803 | return; | ||||||||||
6804 | |||||||||||
6805 | // For an explicitly defaulted or deleted special member, we defer | ||||||||||
6806 | // determining triviality until the class is complete. That time is now! | ||||||||||
6807 | CXXSpecialMember CSM = getSpecialMember(M); | ||||||||||
6808 | if (!M->isImplicit() && !M->isUserProvided()) { | ||||||||||
6809 | if (CSM != CXXInvalid) { | ||||||||||
6810 | M->setTrivial(SpecialMemberIsTrivial(M, CSM)); | ||||||||||
6811 | // Inform the class that we've finished declaring this member. | ||||||||||
6812 | Record->finishedDefaultedOrDeletedMember(M); | ||||||||||
6813 | M->setTrivialForCall( | ||||||||||
6814 | HasTrivialABI || | ||||||||||
6815 | SpecialMemberIsTrivial(M, CSM, TAH_ConsiderTrivialABI)); | ||||||||||
6816 | Record->setTrivialForCallFlags(M); | ||||||||||
6817 | } | ||||||||||
6818 | } | ||||||||||
6819 | |||||||||||
6820 | // Set triviality for the purpose of calls if this is a user-provided | ||||||||||
6821 | // copy/move constructor or destructor. | ||||||||||
6822 | if ((CSM == CXXCopyConstructor || CSM == CXXMoveConstructor || | ||||||||||
6823 | CSM == CXXDestructor) && M->isUserProvided()) { | ||||||||||
6824 | M->setTrivialForCall(HasTrivialABI); | ||||||||||
6825 | Record->setTrivialForCallFlags(M); | ||||||||||
6826 | } | ||||||||||
6827 | |||||||||||
6828 | if (!M->isInvalidDecl() && M->isExplicitlyDefaulted() && | ||||||||||
6829 | M->hasAttr<DLLExportAttr>()) { | ||||||||||
6830 | if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||||||||
6831 | M->isTrivial() && | ||||||||||
6832 | (CSM == CXXDefaultConstructor || CSM == CXXCopyConstructor || | ||||||||||
6833 | CSM == CXXDestructor)) | ||||||||||
6834 | M->dropAttr<DLLExportAttr>(); | ||||||||||
6835 | |||||||||||
6836 | if (M->hasAttr<DLLExportAttr>()) { | ||||||||||
6837 | // Define after any fields with in-class initializers have been parsed. | ||||||||||
6838 | DelayedDllExportMemberFunctions.push_back(M); | ||||||||||
6839 | } | ||||||||||
6840 | } | ||||||||||
6841 | |||||||||||
6842 | // Define defaulted constexpr virtual functions that override a base class | ||||||||||
6843 | // function right away. | ||||||||||
6844 | // FIXME: We can defer doing this until the vtable is marked as used. | ||||||||||
6845 | if (M->isDefaulted() && M->isConstexpr() && M->size_overridden_methods()) | ||||||||||
6846 | DefineDefaultedFunction(*this, M, M->getLocation()); | ||||||||||
6847 | |||||||||||
6848 | if (!Incomplete) | ||||||||||
6849 | CheckCompletedMemberFunction(M); | ||||||||||
6850 | }; | ||||||||||
6851 | |||||||||||
6852 | // Check the destructor before any other member function. We need to | ||||||||||
6853 | // determine whether it's trivial in order to determine whether the claas | ||||||||||
6854 | // type is a literal type, which is a prerequisite for determining whether | ||||||||||
6855 | // other special member functions are valid and whether they're implicitly | ||||||||||
6856 | // 'constexpr'. | ||||||||||
6857 | if (CXXDestructorDecl *Dtor = Record->getDestructor()) | ||||||||||
6858 | CompleteMemberFunction(Dtor); | ||||||||||
6859 | |||||||||||
6860 | bool HasMethodWithOverrideControl = false, | ||||||||||
6861 | HasOverridingMethodWithoutOverrideControl = false; | ||||||||||
6862 | for (auto *D : Record->decls()) { | ||||||||||
6863 | if (auto *M = dyn_cast<CXXMethodDecl>(D)) { | ||||||||||
6864 | // FIXME: We could do this check for dependent types with non-dependent | ||||||||||
6865 | // bases. | ||||||||||
6866 | if (!Record->isDependentType()) { | ||||||||||
6867 | // See if a method overloads virtual methods in a base | ||||||||||
6868 | // class without overriding any. | ||||||||||
6869 | if (!M->isStatic()) | ||||||||||
6870 | DiagnoseHiddenVirtualMethods(M); | ||||||||||
6871 | if (M->hasAttr<OverrideAttr>()) | ||||||||||
6872 | HasMethodWithOverrideControl = true; | ||||||||||
6873 | else if (M->size_overridden_methods() > 0) | ||||||||||
6874 | HasOverridingMethodWithoutOverrideControl = true; | ||||||||||
6875 | } | ||||||||||
6876 | |||||||||||
6877 | if (!isa<CXXDestructorDecl>(M)) | ||||||||||
6878 | CompleteMemberFunction(M); | ||||||||||
6879 | } else if (auto *F = dyn_cast<FriendDecl>(D)) { | ||||||||||
6880 | CheckForDefaultedFunction( | ||||||||||
6881 | dyn_cast_or_null<FunctionDecl>(F->getFriendDecl())); | ||||||||||
6882 | } | ||||||||||
6883 | } | ||||||||||
6884 | |||||||||||
6885 | if (HasOverridingMethodWithoutOverrideControl) { | ||||||||||
6886 | bool HasInconsistentOverrideControl = HasMethodWithOverrideControl; | ||||||||||
6887 | for (auto *M : Record->methods()) | ||||||||||
6888 | DiagnoseAbsenceOfOverrideControl(M, HasInconsistentOverrideControl); | ||||||||||
6889 | } | ||||||||||
6890 | |||||||||||
6891 | // Check the defaulted secondary comparisons after any other member functions. | ||||||||||
6892 | for (FunctionDecl *FD : DefaultedSecondaryComparisons) { | ||||||||||
6893 | CheckExplicitlyDefaultedFunction(S, FD); | ||||||||||
6894 | |||||||||||
6895 | // If this is a member function, we deferred checking it until now. | ||||||||||
6896 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) | ||||||||||
6897 | CheckCompletedMemberFunction(MD); | ||||||||||
6898 | } | ||||||||||
6899 | |||||||||||
6900 | // ms_struct is a request to use the same ABI rules as MSVC. Check | ||||||||||
6901 | // whether this class uses any C++ features that are implemented | ||||||||||
6902 | // completely differently in MSVC, and if so, emit a diagnostic. | ||||||||||
6903 | // That diagnostic defaults to an error, but we allow projects to | ||||||||||
6904 | // map it down to a warning (or ignore it). It's a fairly common | ||||||||||
6905 | // practice among users of the ms_struct pragma to mass-annotate | ||||||||||
6906 | // headers, sweeping up a bunch of types that the project doesn't | ||||||||||
6907 | // really rely on MSVC-compatible layout for. We must therefore | ||||||||||
6908 | // support "ms_struct except for C++ stuff" as a secondary ABI. | ||||||||||
6909 | // Don't emit this diagnostic if the feature was enabled as a | ||||||||||
6910 | // language option (as opposed to via a pragma or attribute), as | ||||||||||
6911 | // the option -mms-bitfields otherwise essentially makes it impossible | ||||||||||
6912 | // to build C++ code, unless this diagnostic is turned off. | ||||||||||
6913 | if (Record->isMsStruct(Context) && !Context.getLangOpts().MSBitfields && | ||||||||||
6914 | (Record->isPolymorphic() || Record->getNumBases())) { | ||||||||||
6915 | Diag(Record->getLocation(), diag::warn_cxx_ms_struct); | ||||||||||
6916 | } | ||||||||||
6917 | |||||||||||
6918 | checkClassLevelDLLAttribute(Record); | ||||||||||
6919 | checkClassLevelCodeSegAttribute(Record); | ||||||||||
6920 | |||||||||||
6921 | bool ClangABICompat4 = | ||||||||||
6922 | Context.getLangOpts().getClangABICompat() <= LangOptions::ClangABI::Ver4; | ||||||||||
6923 | TargetInfo::CallingConvKind CCK = | ||||||||||
6924 | Context.getTargetInfo().getCallingConvKind(ClangABICompat4); | ||||||||||
6925 | bool CanPass = canPassInRegisters(*this, Record, CCK); | ||||||||||
6926 | |||||||||||
6927 | // Do not change ArgPassingRestrictions if it has already been set to | ||||||||||
6928 | // APK_CanNeverPassInRegs. | ||||||||||
6929 | if (Record->getArgPassingRestrictions() != RecordDecl::APK_CanNeverPassInRegs) | ||||||||||
6930 | Record->setArgPassingRestrictions(CanPass | ||||||||||
6931 | ? RecordDecl::APK_CanPassInRegs | ||||||||||
6932 | : RecordDecl::APK_CannotPassInRegs); | ||||||||||
6933 | |||||||||||
6934 | // If canPassInRegisters returns true despite the record having a non-trivial | ||||||||||
6935 | // destructor, the record is destructed in the callee. This happens only when | ||||||||||
6936 | // the record or one of its subobjects has a field annotated with trivial_abi | ||||||||||
6937 | // or a field qualified with ObjC __strong/__weak. | ||||||||||
6938 | if (Context.getTargetInfo().getCXXABI().areArgsDestroyedLeftToRightInCallee()) | ||||||||||
6939 | Record->setParamDestroyedInCallee(true); | ||||||||||
6940 | else if (Record->hasNonTrivialDestructor()) | ||||||||||
6941 | Record->setParamDestroyedInCallee(CanPass); | ||||||||||
6942 | |||||||||||
6943 | if (getLangOpts().ForceEmitVTables) { | ||||||||||
6944 | // If we want to emit all the vtables, we need to mark it as used. This | ||||||||||
6945 | // is especially required for cases like vtable assumption loads. | ||||||||||
6946 | MarkVTableUsed(Record->getInnerLocStart(), Record); | ||||||||||
6947 | } | ||||||||||
6948 | |||||||||||
6949 | if (getLangOpts().CUDA) { | ||||||||||
6950 | if (Record->hasAttr<CUDADeviceBuiltinSurfaceTypeAttr>()) | ||||||||||
6951 | checkCUDADeviceBuiltinSurfaceClassTemplate(*this, Record); | ||||||||||
6952 | else if (Record->hasAttr<CUDADeviceBuiltinTextureTypeAttr>()) | ||||||||||
6953 | checkCUDADeviceBuiltinTextureClassTemplate(*this, Record); | ||||||||||
6954 | } | ||||||||||
6955 | } | ||||||||||
6956 | |||||||||||
6957 | /// Look up the special member function that would be called by a special | ||||||||||
6958 | /// member function for a subobject of class type. | ||||||||||
6959 | /// | ||||||||||
6960 | /// \param Class The class type of the subobject. | ||||||||||
6961 | /// \param CSM The kind of special member function. | ||||||||||
6962 | /// \param FieldQuals If the subobject is a field, its cv-qualifiers. | ||||||||||
6963 | /// \param ConstRHS True if this is a copy operation with a const object | ||||||||||
6964 | /// on its RHS, that is, if the argument to the outer special member | ||||||||||
6965 | /// function is 'const' and this is not a field marked 'mutable'. | ||||||||||
6966 | static Sema::SpecialMemberOverloadResult lookupCallFromSpecialMember( | ||||||||||
6967 | Sema &S, CXXRecordDecl *Class, Sema::CXXSpecialMember CSM, | ||||||||||
6968 | unsigned FieldQuals, bool ConstRHS) { | ||||||||||
6969 | unsigned LHSQuals = 0; | ||||||||||
6970 | if (CSM == Sema::CXXCopyAssignment || CSM == Sema::CXXMoveAssignment) | ||||||||||
6971 | LHSQuals = FieldQuals; | ||||||||||
6972 | |||||||||||
6973 | unsigned RHSQuals = FieldQuals; | ||||||||||
6974 | if (CSM == Sema::CXXDefaultConstructor || CSM == Sema::CXXDestructor) | ||||||||||
6975 | RHSQuals = 0; | ||||||||||
6976 | else if (ConstRHS) | ||||||||||
6977 | RHSQuals |= Qualifiers::Const; | ||||||||||
6978 | |||||||||||
6979 | return S.LookupSpecialMember(Class, CSM, | ||||||||||
6980 | RHSQuals & Qualifiers::Const, | ||||||||||
6981 | RHSQuals & Qualifiers::Volatile, | ||||||||||
6982 | false, | ||||||||||
6983 | LHSQuals & Qualifiers::Const, | ||||||||||
6984 | LHSQuals & Qualifiers::Volatile); | ||||||||||
6985 | } | ||||||||||
6986 | |||||||||||
6987 | class Sema::InheritedConstructorInfo { | ||||||||||
6988 | Sema &S; | ||||||||||
6989 | SourceLocation UseLoc; | ||||||||||
6990 | |||||||||||
6991 | /// A mapping from the base classes through which the constructor was | ||||||||||
6992 | /// inherited to the using shadow declaration in that base class (or a null | ||||||||||
6993 | /// pointer if the constructor was declared in that base class). | ||||||||||
6994 | llvm::DenseMap<CXXRecordDecl *, ConstructorUsingShadowDecl *> | ||||||||||
6995 | InheritedFromBases; | ||||||||||
6996 | |||||||||||
6997 | public: | ||||||||||
6998 | InheritedConstructorInfo(Sema &S, SourceLocation UseLoc, | ||||||||||
6999 | ConstructorUsingShadowDecl *Shadow) | ||||||||||
7000 | : S(S), UseLoc(UseLoc) { | ||||||||||
7001 | bool DiagnosedMultipleConstructedBases = false; | ||||||||||
7002 | CXXRecordDecl *ConstructedBase = nullptr; | ||||||||||
7003 | BaseUsingDecl *ConstructedBaseIntroducer = nullptr; | ||||||||||
7004 | |||||||||||
7005 | // Find the set of such base class subobjects and check that there's a | ||||||||||
7006 | // unique constructed subobject. | ||||||||||
7007 | for (auto *D : Shadow->redecls()) { | ||||||||||
7008 | auto *DShadow = cast<ConstructorUsingShadowDecl>(D); | ||||||||||
7009 | auto *DNominatedBase = DShadow->getNominatedBaseClass(); | ||||||||||
7010 | auto *DConstructedBase = DShadow->getConstructedBaseClass(); | ||||||||||
7011 | |||||||||||
7012 | InheritedFromBases.insert( | ||||||||||
7013 | std::make_pair(DNominatedBase->getCanonicalDecl(), | ||||||||||
7014 | DShadow->getNominatedBaseClassShadowDecl())); | ||||||||||
7015 | if (DShadow->constructsVirtualBase()) | ||||||||||
7016 | InheritedFromBases.insert( | ||||||||||
7017 | std::make_pair(DConstructedBase->getCanonicalDecl(), | ||||||||||
7018 | DShadow->getConstructedBaseClassShadowDecl())); | ||||||||||
7019 | else | ||||||||||
7020 | assert(DNominatedBase == DConstructedBase)(static_cast <bool> (DNominatedBase == DConstructedBase ) ? void (0) : __assert_fail ("DNominatedBase == DConstructedBase" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7020, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7021 | |||||||||||
7022 | // [class.inhctor.init]p2: | ||||||||||
7023 | // If the constructor was inherited from multiple base class subobjects | ||||||||||
7024 | // of type B, the program is ill-formed. | ||||||||||
7025 | if (!ConstructedBase) { | ||||||||||
7026 | ConstructedBase = DConstructedBase; | ||||||||||
7027 | ConstructedBaseIntroducer = D->getIntroducer(); | ||||||||||
7028 | } else if (ConstructedBase != DConstructedBase && | ||||||||||
7029 | !Shadow->isInvalidDecl()) { | ||||||||||
7030 | if (!DiagnosedMultipleConstructedBases) { | ||||||||||
7031 | S.Diag(UseLoc, diag::err_ambiguous_inherited_constructor) | ||||||||||
7032 | << Shadow->getTargetDecl(); | ||||||||||
7033 | S.Diag(ConstructedBaseIntroducer->getLocation(), | ||||||||||
7034 | diag::note_ambiguous_inherited_constructor_using) | ||||||||||
7035 | << ConstructedBase; | ||||||||||
7036 | DiagnosedMultipleConstructedBases = true; | ||||||||||
7037 | } | ||||||||||
7038 | S.Diag(D->getIntroducer()->getLocation(), | ||||||||||
7039 | diag::note_ambiguous_inherited_constructor_using) | ||||||||||
7040 | << DConstructedBase; | ||||||||||
7041 | } | ||||||||||
7042 | } | ||||||||||
7043 | |||||||||||
7044 | if (DiagnosedMultipleConstructedBases) | ||||||||||
7045 | Shadow->setInvalidDecl(); | ||||||||||
7046 | } | ||||||||||
7047 | |||||||||||
7048 | /// Find the constructor to use for inherited construction of a base class, | ||||||||||
7049 | /// and whether that base class constructor inherits the constructor from a | ||||||||||
7050 | /// virtual base class (in which case it won't actually invoke it). | ||||||||||
7051 | std::pair<CXXConstructorDecl *, bool> | ||||||||||
7052 | findConstructorForBase(CXXRecordDecl *Base, CXXConstructorDecl *Ctor) const { | ||||||||||
7053 | auto It = InheritedFromBases.find(Base->getCanonicalDecl()); | ||||||||||
7054 | if (It == InheritedFromBases.end()) | ||||||||||
7055 | return std::make_pair(nullptr, false); | ||||||||||
7056 | |||||||||||
7057 | // This is an intermediary class. | ||||||||||
7058 | if (It->second) | ||||||||||
7059 | return std::make_pair( | ||||||||||
7060 | S.findInheritingConstructor(UseLoc, Ctor, It->second), | ||||||||||
7061 | It->second->constructsVirtualBase()); | ||||||||||
7062 | |||||||||||
7063 | // This is the base class from which the constructor was inherited. | ||||||||||
7064 | return std::make_pair(Ctor, false); | ||||||||||
7065 | } | ||||||||||
7066 | }; | ||||||||||
7067 | |||||||||||
7068 | /// Is the special member function which would be selected to perform the | ||||||||||
7069 | /// specified operation on the specified class type a constexpr constructor? | ||||||||||
7070 | static bool | ||||||||||
7071 | specialMemberIsConstexpr(Sema &S, CXXRecordDecl *ClassDecl, | ||||||||||
7072 | Sema::CXXSpecialMember CSM, unsigned Quals, | ||||||||||
7073 | bool ConstRHS, | ||||||||||
7074 | CXXConstructorDecl *InheritedCtor = nullptr, | ||||||||||
7075 | Sema::InheritedConstructorInfo *Inherited = nullptr) { | ||||||||||
7076 | // If we're inheriting a constructor, see if we need to call it for this base | ||||||||||
7077 | // class. | ||||||||||
7078 | if (InheritedCtor) { | ||||||||||
7079 | assert(CSM == Sema::CXXDefaultConstructor)(static_cast <bool> (CSM == Sema::CXXDefaultConstructor ) ? void (0) : __assert_fail ("CSM == Sema::CXXDefaultConstructor" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7079, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7080 | auto BaseCtor = | ||||||||||
7081 | Inherited->findConstructorForBase(ClassDecl, InheritedCtor).first; | ||||||||||
7082 | if (BaseCtor) | ||||||||||
7083 | return BaseCtor->isConstexpr(); | ||||||||||
7084 | } | ||||||||||
7085 | |||||||||||
7086 | if (CSM == Sema::CXXDefaultConstructor) | ||||||||||
7087 | return ClassDecl->hasConstexprDefaultConstructor(); | ||||||||||
7088 | if (CSM == Sema::CXXDestructor) | ||||||||||
7089 | return ClassDecl->hasConstexprDestructor(); | ||||||||||
7090 | |||||||||||
7091 | Sema::SpecialMemberOverloadResult SMOR = | ||||||||||
7092 | lookupCallFromSpecialMember(S, ClassDecl, CSM, Quals, ConstRHS); | ||||||||||
7093 | if (!SMOR.getMethod()) | ||||||||||
7094 | // A constructor we wouldn't select can't be "involved in initializing" | ||||||||||
7095 | // anything. | ||||||||||
7096 | return true; | ||||||||||
7097 | return SMOR.getMethod()->isConstexpr(); | ||||||||||
7098 | } | ||||||||||
7099 | |||||||||||
7100 | /// Determine whether the specified special member function would be constexpr | ||||||||||
7101 | /// if it were implicitly defined. | ||||||||||
7102 | static bool defaultedSpecialMemberIsConstexpr( | ||||||||||
7103 | Sema &S, CXXRecordDecl *ClassDecl, Sema::CXXSpecialMember CSM, | ||||||||||
7104 | bool ConstArg, CXXConstructorDecl *InheritedCtor = nullptr, | ||||||||||
7105 | Sema::InheritedConstructorInfo *Inherited = nullptr) { | ||||||||||
7106 | if (!S.getLangOpts().CPlusPlus11) | ||||||||||
7107 | return false; | ||||||||||
7108 | |||||||||||
7109 | // C++11 [dcl.constexpr]p4: | ||||||||||
7110 | // In the definition of a constexpr constructor [...] | ||||||||||
7111 | bool Ctor = true; | ||||||||||
7112 | switch (CSM) { | ||||||||||
7113 | case Sema::CXXDefaultConstructor: | ||||||||||
7114 | if (Inherited) | ||||||||||
7115 | break; | ||||||||||
7116 | // Since default constructor lookup is essentially trivial (and cannot | ||||||||||
7117 | // involve, for instance, template instantiation), we compute whether a | ||||||||||
7118 | // defaulted default constructor is constexpr directly within CXXRecordDecl. | ||||||||||
7119 | // | ||||||||||
7120 | // This is important for performance; we need to know whether the default | ||||||||||
7121 | // constructor is constexpr to determine whether the type is a literal type. | ||||||||||
7122 | return ClassDecl->defaultedDefaultConstructorIsConstexpr(); | ||||||||||
7123 | |||||||||||
7124 | case Sema::CXXCopyConstructor: | ||||||||||
7125 | case Sema::CXXMoveConstructor: | ||||||||||
7126 | // For copy or move constructors, we need to perform overload resolution. | ||||||||||
7127 | break; | ||||||||||
7128 | |||||||||||
7129 | case Sema::CXXCopyAssignment: | ||||||||||
7130 | case Sema::CXXMoveAssignment: | ||||||||||
7131 | if (!S.getLangOpts().CPlusPlus14) | ||||||||||
7132 | return false; | ||||||||||
7133 | // In C++1y, we need to perform overload resolution. | ||||||||||
7134 | Ctor = false; | ||||||||||
7135 | break; | ||||||||||
7136 | |||||||||||
7137 | case Sema::CXXDestructor: | ||||||||||
7138 | return ClassDecl->defaultedDestructorIsConstexpr(); | ||||||||||
7139 | |||||||||||
7140 | case Sema::CXXInvalid: | ||||||||||
7141 | return false; | ||||||||||
7142 | } | ||||||||||
7143 | |||||||||||
7144 | // -- if the class is a non-empty union, or for each non-empty anonymous | ||||||||||
7145 | // union member of a non-union class, exactly one non-static data member | ||||||||||
7146 | // shall be initialized; [DR1359] | ||||||||||
7147 | // | ||||||||||
7148 | // If we squint, this is guaranteed, since exactly one non-static data member | ||||||||||
7149 | // will be initialized (if the constructor isn't deleted), we just don't know | ||||||||||
7150 | // which one. | ||||||||||
7151 | if (Ctor && ClassDecl->isUnion()) | ||||||||||
7152 | return CSM == Sema::CXXDefaultConstructor | ||||||||||
7153 | ? ClassDecl->hasInClassInitializer() || | ||||||||||
7154 | !ClassDecl->hasVariantMembers() | ||||||||||
7155 | : true; | ||||||||||
7156 | |||||||||||
7157 | // -- the class shall not have any virtual base classes; | ||||||||||
7158 | if (Ctor && ClassDecl->getNumVBases()) | ||||||||||
7159 | return false; | ||||||||||
7160 | |||||||||||
7161 | // C++1y [class.copy]p26: | ||||||||||
7162 | // -- [the class] is a literal type, and | ||||||||||
7163 | if (!Ctor && !ClassDecl->isLiteral()) | ||||||||||
7164 | return false; | ||||||||||
7165 | |||||||||||
7166 | // -- every constructor involved in initializing [...] base class | ||||||||||
7167 | // sub-objects shall be a constexpr constructor; | ||||||||||
7168 | // -- the assignment operator selected to copy/move each direct base | ||||||||||
7169 | // class is a constexpr function, and | ||||||||||
7170 | for (const auto &B : ClassDecl->bases()) { | ||||||||||
7171 | const RecordType *BaseType = B.getType()->getAs<RecordType>(); | ||||||||||
7172 | if (!BaseType) continue; | ||||||||||
7173 | |||||||||||
7174 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(BaseType->getDecl()); | ||||||||||
7175 | if (!specialMemberIsConstexpr(S, BaseClassDecl, CSM, 0, ConstArg, | ||||||||||
7176 | InheritedCtor, Inherited)) | ||||||||||
7177 | return false; | ||||||||||
7178 | } | ||||||||||
7179 | |||||||||||
7180 | // -- every constructor involved in initializing non-static data members | ||||||||||
7181 | // [...] shall be a constexpr constructor; | ||||||||||
7182 | // -- every non-static data member and base class sub-object shall be | ||||||||||
7183 | // initialized | ||||||||||
7184 | // -- for each non-static data member of X that is of class type (or array | ||||||||||
7185 | // thereof), the assignment operator selected to copy/move that member is | ||||||||||
7186 | // a constexpr function | ||||||||||
7187 | for (const auto *F : ClassDecl->fields()) { | ||||||||||
7188 | if (F->isInvalidDecl()) | ||||||||||
7189 | continue; | ||||||||||
7190 | if (CSM == Sema::CXXDefaultConstructor && F->hasInClassInitializer()) | ||||||||||
7191 | continue; | ||||||||||
7192 | QualType BaseType = S.Context.getBaseElementType(F->getType()); | ||||||||||
7193 | if (const RecordType *RecordTy = BaseType->getAs<RecordType>()) { | ||||||||||
7194 | CXXRecordDecl *FieldRecDecl = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||||||||
7195 | if (!specialMemberIsConstexpr(S, FieldRecDecl, CSM, | ||||||||||
7196 | BaseType.getCVRQualifiers(), | ||||||||||
7197 | ConstArg && !F->isMutable())) | ||||||||||
7198 | return false; | ||||||||||
7199 | } else if (CSM == Sema::CXXDefaultConstructor) { | ||||||||||
7200 | return false; | ||||||||||
7201 | } | ||||||||||
7202 | } | ||||||||||
7203 | |||||||||||
7204 | // All OK, it's constexpr! | ||||||||||
7205 | return true; | ||||||||||
7206 | } | ||||||||||
7207 | |||||||||||
7208 | namespace { | ||||||||||
7209 | /// RAII object to register a defaulted function as having its exception | ||||||||||
7210 | /// specification computed. | ||||||||||
7211 | struct ComputingExceptionSpec { | ||||||||||
7212 | Sema &S; | ||||||||||
7213 | |||||||||||
7214 | ComputingExceptionSpec(Sema &S, FunctionDecl *FD, SourceLocation Loc) | ||||||||||
7215 | : S(S) { | ||||||||||
7216 | Sema::CodeSynthesisContext Ctx; | ||||||||||
7217 | Ctx.Kind = Sema::CodeSynthesisContext::ExceptionSpecEvaluation; | ||||||||||
7218 | Ctx.PointOfInstantiation = Loc; | ||||||||||
7219 | Ctx.Entity = FD; | ||||||||||
7220 | S.pushCodeSynthesisContext(Ctx); | ||||||||||
7221 | } | ||||||||||
7222 | ~ComputingExceptionSpec() { | ||||||||||
7223 | S.popCodeSynthesisContext(); | ||||||||||
7224 | } | ||||||||||
7225 | }; | ||||||||||
7226 | } | ||||||||||
7227 | |||||||||||
7228 | static Sema::ImplicitExceptionSpecification | ||||||||||
7229 | ComputeDefaultedSpecialMemberExceptionSpec( | ||||||||||
7230 | Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||||||||
7231 | Sema::InheritedConstructorInfo *ICI); | ||||||||||
7232 | |||||||||||
7233 | static Sema::ImplicitExceptionSpecification | ||||||||||
7234 | ComputeDefaultedComparisonExceptionSpec(Sema &S, SourceLocation Loc, | ||||||||||
7235 | FunctionDecl *FD, | ||||||||||
7236 | Sema::DefaultedComparisonKind DCK); | ||||||||||
7237 | |||||||||||
7238 | static Sema::ImplicitExceptionSpecification | ||||||||||
7239 | computeImplicitExceptionSpec(Sema &S, SourceLocation Loc, FunctionDecl *FD) { | ||||||||||
7240 | auto DFK = S.getDefaultedFunctionKind(FD); | ||||||||||
7241 | if (DFK.isSpecialMember()) | ||||||||||
7242 | return ComputeDefaultedSpecialMemberExceptionSpec( | ||||||||||
7243 | S, Loc, cast<CXXMethodDecl>(FD), DFK.asSpecialMember(), nullptr); | ||||||||||
7244 | if (DFK.isComparison()) | ||||||||||
7245 | return ComputeDefaultedComparisonExceptionSpec(S, Loc, FD, | ||||||||||
7246 | DFK.asComparison()); | ||||||||||
7247 | |||||||||||
7248 | auto *CD = cast<CXXConstructorDecl>(FD); | ||||||||||
7249 | assert(CD->getInheritedConstructor() &&(static_cast <bool> (CD->getInheritedConstructor() && "only defaulted functions and inherited constructors have implicit " "exception specs") ? void (0) : __assert_fail ("CD->getInheritedConstructor() && \"only defaulted functions and inherited constructors have implicit \" \"exception specs\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7251, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
7250 | "only defaulted functions and inherited constructors have implicit "(static_cast <bool> (CD->getInheritedConstructor() && "only defaulted functions and inherited constructors have implicit " "exception specs") ? void (0) : __assert_fail ("CD->getInheritedConstructor() && \"only defaulted functions and inherited constructors have implicit \" \"exception specs\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7251, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
7251 | "exception specs")(static_cast <bool> (CD->getInheritedConstructor() && "only defaulted functions and inherited constructors have implicit " "exception specs") ? void (0) : __assert_fail ("CD->getInheritedConstructor() && \"only defaulted functions and inherited constructors have implicit \" \"exception specs\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7251, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7252 | Sema::InheritedConstructorInfo ICI( | ||||||||||
7253 | S, Loc, CD->getInheritedConstructor().getShadowDecl()); | ||||||||||
7254 | return ComputeDefaultedSpecialMemberExceptionSpec( | ||||||||||
7255 | S, Loc, CD, Sema::CXXDefaultConstructor, &ICI); | ||||||||||
7256 | } | ||||||||||
7257 | |||||||||||
7258 | static FunctionProtoType::ExtProtoInfo getImplicitMethodEPI(Sema &S, | ||||||||||
7259 | CXXMethodDecl *MD) { | ||||||||||
7260 | FunctionProtoType::ExtProtoInfo EPI; | ||||||||||
7261 | |||||||||||
7262 | // Build an exception specification pointing back at this member. | ||||||||||
7263 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||||||
7264 | EPI.ExceptionSpec.SourceDecl = MD; | ||||||||||
7265 | |||||||||||
7266 | // Set the calling convention to the default for C++ instance methods. | ||||||||||
7267 | EPI.ExtInfo = EPI.ExtInfo.withCallingConv( | ||||||||||
7268 | S.Context.getDefaultCallingConvention(/*IsVariadic=*/false, | ||||||||||
7269 | /*IsCXXMethod=*/true)); | ||||||||||
7270 | return EPI; | ||||||||||
7271 | } | ||||||||||
7272 | |||||||||||
7273 | void Sema::EvaluateImplicitExceptionSpec(SourceLocation Loc, FunctionDecl *FD) { | ||||||||||
7274 | const FunctionProtoType *FPT = FD->getType()->castAs<FunctionProtoType>(); | ||||||||||
7275 | if (FPT->getExceptionSpecType() != EST_Unevaluated) | ||||||||||
7276 | return; | ||||||||||
7277 | |||||||||||
7278 | // Evaluate the exception specification. | ||||||||||
7279 | auto IES = computeImplicitExceptionSpec(*this, Loc, FD); | ||||||||||
7280 | auto ESI = IES.getExceptionSpec(); | ||||||||||
7281 | |||||||||||
7282 | // Update the type of the special member to use it. | ||||||||||
7283 | UpdateExceptionSpec(FD, ESI); | ||||||||||
7284 | } | ||||||||||
7285 | |||||||||||
7286 | void Sema::CheckExplicitlyDefaultedFunction(Scope *S, FunctionDecl *FD) { | ||||||||||
7287 | assert(FD->isExplicitlyDefaulted() && "not explicitly-defaulted")(static_cast <bool> (FD->isExplicitlyDefaulted() && "not explicitly-defaulted") ? void (0) : __assert_fail ("FD->isExplicitlyDefaulted() && \"not explicitly-defaulted\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7287, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7288 | |||||||||||
7289 | DefaultedFunctionKind DefKind = getDefaultedFunctionKind(FD); | ||||||||||
7290 | if (!DefKind) { | ||||||||||
7291 | assert(FD->getDeclContext()->isDependentContext())(static_cast <bool> (FD->getDeclContext()->isDependentContext ()) ? void (0) : __assert_fail ("FD->getDeclContext()->isDependentContext()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7291, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7292 | return; | ||||||||||
7293 | } | ||||||||||
7294 | |||||||||||
7295 | if (DefKind.isComparison()) | ||||||||||
7296 | UnusedPrivateFields.clear(); | ||||||||||
7297 | |||||||||||
7298 | if (DefKind.isSpecialMember() | ||||||||||
7299 | ? CheckExplicitlyDefaultedSpecialMember(cast<CXXMethodDecl>(FD), | ||||||||||
7300 | DefKind.asSpecialMember()) | ||||||||||
7301 | : CheckExplicitlyDefaultedComparison(S, FD, DefKind.asComparison())) | ||||||||||
7302 | FD->setInvalidDecl(); | ||||||||||
7303 | } | ||||||||||
7304 | |||||||||||
7305 | bool Sema::CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD, | ||||||||||
7306 | CXXSpecialMember CSM) { | ||||||||||
7307 | CXXRecordDecl *RD = MD->getParent(); | ||||||||||
7308 | |||||||||||
7309 | assert(MD->isExplicitlyDefaulted() && CSM != CXXInvalid &&(static_cast <bool> (MD->isExplicitlyDefaulted() && CSM != CXXInvalid && "not an explicitly-defaulted special member" ) ? void (0) : __assert_fail ("MD->isExplicitlyDefaulted() && CSM != CXXInvalid && \"not an explicitly-defaulted special member\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7310, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
7310 | "not an explicitly-defaulted special member")(static_cast <bool> (MD->isExplicitlyDefaulted() && CSM != CXXInvalid && "not an explicitly-defaulted special member" ) ? void (0) : __assert_fail ("MD->isExplicitlyDefaulted() && CSM != CXXInvalid && \"not an explicitly-defaulted special member\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7310, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7311 | |||||||||||
7312 | // Defer all checking for special members of a dependent type. | ||||||||||
7313 | if (RD->isDependentType()) | ||||||||||
7314 | return false; | ||||||||||
7315 | |||||||||||
7316 | // Whether this was the first-declared instance of the constructor. | ||||||||||
7317 | // This affects whether we implicitly add an exception spec and constexpr. | ||||||||||
7318 | bool First = MD == MD->getCanonicalDecl(); | ||||||||||
7319 | |||||||||||
7320 | bool HadError = false; | ||||||||||
7321 | |||||||||||
7322 | // C++11 [dcl.fct.def.default]p1: | ||||||||||
7323 | // A function that is explicitly defaulted shall | ||||||||||
7324 | // -- be a special member function [...] (checked elsewhere), | ||||||||||
7325 | // -- have the same type (except for ref-qualifiers, and except that a | ||||||||||
7326 | // copy operation can take a non-const reference) as an implicit | ||||||||||
7327 | // declaration, and | ||||||||||
7328 | // -- not have default arguments. | ||||||||||
7329 | // C++2a changes the second bullet to instead delete the function if it's | ||||||||||
7330 | // defaulted on its first declaration, unless it's "an assignment operator, | ||||||||||
7331 | // and its return type differs or its parameter type is not a reference". | ||||||||||
7332 | bool DeleteOnTypeMismatch = getLangOpts().CPlusPlus20 && First; | ||||||||||
7333 | bool ShouldDeleteForTypeMismatch = false; | ||||||||||
7334 | unsigned ExpectedParams = 1; | ||||||||||
7335 | if (CSM == CXXDefaultConstructor || CSM == CXXDestructor) | ||||||||||
7336 | ExpectedParams = 0; | ||||||||||
7337 | if (MD->getNumParams() != ExpectedParams) { | ||||||||||
7338 | // This checks for default arguments: a copy or move constructor with a | ||||||||||
7339 | // default argument is classified as a default constructor, and assignment | ||||||||||
7340 | // operations and destructors can't have default arguments. | ||||||||||
7341 | Diag(MD->getLocation(), diag::err_defaulted_special_member_params) | ||||||||||
7342 | << CSM << MD->getSourceRange(); | ||||||||||
7343 | HadError = true; | ||||||||||
7344 | } else if (MD->isVariadic()) { | ||||||||||
7345 | if (DeleteOnTypeMismatch) | ||||||||||
7346 | ShouldDeleteForTypeMismatch = true; | ||||||||||
7347 | else { | ||||||||||
7348 | Diag(MD->getLocation(), diag::err_defaulted_special_member_variadic) | ||||||||||
7349 | << CSM << MD->getSourceRange(); | ||||||||||
7350 | HadError = true; | ||||||||||
7351 | } | ||||||||||
7352 | } | ||||||||||
7353 | |||||||||||
7354 | const FunctionProtoType *Type = MD->getType()->getAs<FunctionProtoType>(); | ||||||||||
7355 | |||||||||||
7356 | bool CanHaveConstParam = false; | ||||||||||
7357 | if (CSM == CXXCopyConstructor) | ||||||||||
7358 | CanHaveConstParam = RD->implicitCopyConstructorHasConstParam(); | ||||||||||
7359 | else if (CSM == CXXCopyAssignment) | ||||||||||
7360 | CanHaveConstParam = RD->implicitCopyAssignmentHasConstParam(); | ||||||||||
7361 | |||||||||||
7362 | QualType ReturnType = Context.VoidTy; | ||||||||||
7363 | if (CSM == CXXCopyAssignment || CSM == CXXMoveAssignment) { | ||||||||||
7364 | // Check for return type matching. | ||||||||||
7365 | ReturnType = Type->getReturnType(); | ||||||||||
7366 | |||||||||||
7367 | QualType DeclType = Context.getTypeDeclType(RD); | ||||||||||
7368 | DeclType = Context.getAddrSpaceQualType(DeclType, MD->getMethodQualifiers().getAddressSpace()); | ||||||||||
7369 | QualType ExpectedReturnType = Context.getLValueReferenceType(DeclType); | ||||||||||
7370 | |||||||||||
7371 | if (!Context.hasSameType(ReturnType, ExpectedReturnType)) { | ||||||||||
7372 | Diag(MD->getLocation(), diag::err_defaulted_special_member_return_type) | ||||||||||
7373 | << (CSM == CXXMoveAssignment) << ExpectedReturnType; | ||||||||||
7374 | HadError = true; | ||||||||||
7375 | } | ||||||||||
7376 | |||||||||||
7377 | // A defaulted special member cannot have cv-qualifiers. | ||||||||||
7378 | if (Type->getMethodQuals().hasConst() || Type->getMethodQuals().hasVolatile()) { | ||||||||||
7379 | if (DeleteOnTypeMismatch) | ||||||||||
7380 | ShouldDeleteForTypeMismatch = true; | ||||||||||
7381 | else { | ||||||||||
7382 | Diag(MD->getLocation(), diag::err_defaulted_special_member_quals) | ||||||||||
7383 | << (CSM == CXXMoveAssignment) << getLangOpts().CPlusPlus14; | ||||||||||
7384 | HadError = true; | ||||||||||
7385 | } | ||||||||||
7386 | } | ||||||||||
7387 | } | ||||||||||
7388 | |||||||||||
7389 | // Check for parameter type matching. | ||||||||||
7390 | QualType ArgType = ExpectedParams ? Type->getParamType(0) : QualType(); | ||||||||||
7391 | bool HasConstParam = false; | ||||||||||
7392 | if (ExpectedParams && ArgType->isReferenceType()) { | ||||||||||
7393 | // Argument must be reference to possibly-const T. | ||||||||||
7394 | QualType ReferentType = ArgType->getPointeeType(); | ||||||||||
7395 | HasConstParam = ReferentType.isConstQualified(); | ||||||||||
7396 | |||||||||||
7397 | if (ReferentType.isVolatileQualified()) { | ||||||||||
7398 | if (DeleteOnTypeMismatch) | ||||||||||
7399 | ShouldDeleteForTypeMismatch = true; | ||||||||||
7400 | else { | ||||||||||
7401 | Diag(MD->getLocation(), | ||||||||||
7402 | diag::err_defaulted_special_member_volatile_param) << CSM; | ||||||||||
7403 | HadError = true; | ||||||||||
7404 | } | ||||||||||
7405 | } | ||||||||||
7406 | |||||||||||
7407 | if (HasConstParam && !CanHaveConstParam) { | ||||||||||
7408 | if (DeleteOnTypeMismatch) | ||||||||||
7409 | ShouldDeleteForTypeMismatch = true; | ||||||||||
7410 | else if (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment) { | ||||||||||
7411 | Diag(MD->getLocation(), | ||||||||||
7412 | diag::err_defaulted_special_member_copy_const_param) | ||||||||||
7413 | << (CSM == CXXCopyAssignment); | ||||||||||
7414 | // FIXME: Explain why this special member can't be const. | ||||||||||
7415 | HadError = true; | ||||||||||
7416 | } else { | ||||||||||
7417 | Diag(MD->getLocation(), | ||||||||||
7418 | diag::err_defaulted_special_member_move_const_param) | ||||||||||
7419 | << (CSM == CXXMoveAssignment); | ||||||||||
7420 | HadError = true; | ||||||||||
7421 | } | ||||||||||
7422 | } | ||||||||||
7423 | } else if (ExpectedParams) { | ||||||||||
7424 | // A copy assignment operator can take its argument by value, but a | ||||||||||
7425 | // defaulted one cannot. | ||||||||||
7426 | assert(CSM == CXXCopyAssignment && "unexpected non-ref argument")(static_cast <bool> (CSM == CXXCopyAssignment && "unexpected non-ref argument") ? void (0) : __assert_fail ("CSM == CXXCopyAssignment && \"unexpected non-ref argument\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7426, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7427 | Diag(MD->getLocation(), diag::err_defaulted_copy_assign_not_ref); | ||||||||||
7428 | HadError = true; | ||||||||||
7429 | } | ||||||||||
7430 | |||||||||||
7431 | // C++11 [dcl.fct.def.default]p2: | ||||||||||
7432 | // An explicitly-defaulted function may be declared constexpr only if it | ||||||||||
7433 | // would have been implicitly declared as constexpr, | ||||||||||
7434 | // Do not apply this rule to members of class templates, since core issue 1358 | ||||||||||
7435 | // makes such functions always instantiate to constexpr functions. For | ||||||||||
7436 | // functions which cannot be constexpr (for non-constructors in C++11 and for | ||||||||||
7437 | // destructors in C++14 and C++17), this is checked elsewhere. | ||||||||||
7438 | // | ||||||||||
7439 | // FIXME: This should not apply if the member is deleted. | ||||||||||
7440 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, RD, CSM, | ||||||||||
7441 | HasConstParam); | ||||||||||
7442 | if ((getLangOpts().CPlusPlus20 || | ||||||||||
7443 | (getLangOpts().CPlusPlus14 ? !isa<CXXDestructorDecl>(MD) | ||||||||||
7444 | : isa<CXXConstructorDecl>(MD))) && | ||||||||||
7445 | MD->isConstexpr() && !Constexpr && | ||||||||||
7446 | MD->getTemplatedKind() == FunctionDecl::TK_NonTemplate) { | ||||||||||
7447 | Diag(MD->getBeginLoc(), MD->isConsteval() | ||||||||||
7448 | ? diag::err_incorrect_defaulted_consteval | ||||||||||
7449 | : diag::err_incorrect_defaulted_constexpr) | ||||||||||
7450 | << CSM; | ||||||||||
7451 | // FIXME: Explain why the special member can't be constexpr. | ||||||||||
7452 | HadError = true; | ||||||||||
7453 | } | ||||||||||
7454 | |||||||||||
7455 | if (First) { | ||||||||||
7456 | // C++2a [dcl.fct.def.default]p3: | ||||||||||
7457 | // If a function is explicitly defaulted on its first declaration, it is | ||||||||||
7458 | // implicitly considered to be constexpr if the implicit declaration | ||||||||||
7459 | // would be. | ||||||||||
7460 | MD->setConstexprKind(Constexpr ? (MD->isConsteval() | ||||||||||
7461 | ? ConstexprSpecKind::Consteval | ||||||||||
7462 | : ConstexprSpecKind::Constexpr) | ||||||||||
7463 | : ConstexprSpecKind::Unspecified); | ||||||||||
7464 | |||||||||||
7465 | if (!Type->hasExceptionSpec()) { | ||||||||||
7466 | // C++2a [except.spec]p3: | ||||||||||
7467 | // If a declaration of a function does not have a noexcept-specifier | ||||||||||
7468 | // [and] is defaulted on its first declaration, [...] the exception | ||||||||||
7469 | // specification is as specified below | ||||||||||
7470 | FunctionProtoType::ExtProtoInfo EPI = Type->getExtProtoInfo(); | ||||||||||
7471 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||||||
7472 | EPI.ExceptionSpec.SourceDecl = MD; | ||||||||||
7473 | MD->setType(Context.getFunctionType(ReturnType, | ||||||||||
7474 | llvm::makeArrayRef(&ArgType, | ||||||||||
7475 | ExpectedParams), | ||||||||||
7476 | EPI)); | ||||||||||
7477 | } | ||||||||||
7478 | } | ||||||||||
7479 | |||||||||||
7480 | if (ShouldDeleteForTypeMismatch || ShouldDeleteSpecialMember(MD, CSM)) { | ||||||||||
7481 | if (First) { | ||||||||||
7482 | SetDeclDeleted(MD, MD->getLocation()); | ||||||||||
7483 | if (!inTemplateInstantiation() && !HadError) { | ||||||||||
7484 | Diag(MD->getLocation(), diag::warn_defaulted_method_deleted) << CSM; | ||||||||||
7485 | if (ShouldDeleteForTypeMismatch) { | ||||||||||
7486 | Diag(MD->getLocation(), diag::note_deleted_type_mismatch) << CSM; | ||||||||||
7487 | } else { | ||||||||||
7488 | ShouldDeleteSpecialMember(MD, CSM, nullptr, /*Diagnose*/true); | ||||||||||
7489 | } | ||||||||||
7490 | } | ||||||||||
7491 | if (ShouldDeleteForTypeMismatch && !HadError) { | ||||||||||
7492 | Diag(MD->getLocation(), | ||||||||||
7493 | diag::warn_cxx17_compat_defaulted_method_type_mismatch) << CSM; | ||||||||||
7494 | } | ||||||||||
7495 | } else { | ||||||||||
7496 | // C++11 [dcl.fct.def.default]p4: | ||||||||||
7497 | // [For a] user-provided explicitly-defaulted function [...] if such a | ||||||||||
7498 | // function is implicitly defined as deleted, the program is ill-formed. | ||||||||||
7499 | Diag(MD->getLocation(), diag::err_out_of_line_default_deletes) << CSM; | ||||||||||
7500 | assert(!ShouldDeleteForTypeMismatch && "deleted non-first decl")(static_cast <bool> (!ShouldDeleteForTypeMismatch && "deleted non-first decl") ? void (0) : __assert_fail ("!ShouldDeleteForTypeMismatch && \"deleted non-first decl\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7500, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7501 | ShouldDeleteSpecialMember(MD, CSM, nullptr, /*Diagnose*/true); | ||||||||||
7502 | HadError = true; | ||||||||||
7503 | } | ||||||||||
7504 | } | ||||||||||
7505 | |||||||||||
7506 | return HadError; | ||||||||||
7507 | } | ||||||||||
7508 | |||||||||||
7509 | namespace { | ||||||||||
7510 | /// Helper class for building and checking a defaulted comparison. | ||||||||||
7511 | /// | ||||||||||
7512 | /// Defaulted functions are built in two phases: | ||||||||||
7513 | /// | ||||||||||
7514 | /// * First, the set of operations that the function will perform are | ||||||||||
7515 | /// identified, and some of them are checked. If any of the checked | ||||||||||
7516 | /// operations is invalid in certain ways, the comparison function is | ||||||||||
7517 | /// defined as deleted and no body is built. | ||||||||||
7518 | /// * Then, if the function is not defined as deleted, the body is built. | ||||||||||
7519 | /// | ||||||||||
7520 | /// This is accomplished by performing two visitation steps over the eventual | ||||||||||
7521 | /// body of the function. | ||||||||||
7522 | template<typename Derived, typename ResultList, typename Result, | ||||||||||
7523 | typename Subobject> | ||||||||||
7524 | class DefaultedComparisonVisitor { | ||||||||||
7525 | public: | ||||||||||
7526 | using DefaultedComparisonKind = Sema::DefaultedComparisonKind; | ||||||||||
7527 | |||||||||||
7528 | DefaultedComparisonVisitor(Sema &S, CXXRecordDecl *RD, FunctionDecl *FD, | ||||||||||
7529 | DefaultedComparisonKind DCK) | ||||||||||
7530 | : S(S), RD(RD), FD(FD), DCK(DCK) { | ||||||||||
7531 | if (auto *Info = FD->getDefaultedFunctionInfo()) { | ||||||||||
7532 | // FIXME: Change CreateOverloadedBinOp to take an ArrayRef instead of an | ||||||||||
7533 | // UnresolvedSet to avoid this copy. | ||||||||||
7534 | Fns.assign(Info->getUnqualifiedLookups().begin(), | ||||||||||
7535 | Info->getUnqualifiedLookups().end()); | ||||||||||
7536 | } | ||||||||||
7537 | } | ||||||||||
7538 | |||||||||||
7539 | ResultList visit() { | ||||||||||
7540 | // The type of an lvalue naming a parameter of this function. | ||||||||||
7541 | QualType ParamLvalType = | ||||||||||
7542 | FD->getParamDecl(0)->getType().getNonReferenceType(); | ||||||||||
7543 | |||||||||||
7544 | ResultList Results; | ||||||||||
7545 | |||||||||||
7546 | switch (DCK) { | ||||||||||
7547 | case DefaultedComparisonKind::None: | ||||||||||
7548 | llvm_unreachable("not a defaulted comparison")::llvm::llvm_unreachable_internal("not a defaulted comparison" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7548); | ||||||||||
7549 | |||||||||||
7550 | case DefaultedComparisonKind::Equal: | ||||||||||
7551 | case DefaultedComparisonKind::ThreeWay: | ||||||||||
7552 | getDerived().visitSubobjects(Results, RD, ParamLvalType.getQualifiers()); | ||||||||||
7553 | return Results; | ||||||||||
7554 | |||||||||||
7555 | case DefaultedComparisonKind::NotEqual: | ||||||||||
7556 | case DefaultedComparisonKind::Relational: | ||||||||||
7557 | Results.add(getDerived().visitExpandedSubobject( | ||||||||||
7558 | ParamLvalType, getDerived().getCompleteObject())); | ||||||||||
7559 | return Results; | ||||||||||
7560 | } | ||||||||||
7561 | llvm_unreachable("")::llvm::llvm_unreachable_internal("", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7561); | ||||||||||
7562 | } | ||||||||||
7563 | |||||||||||
7564 | protected: | ||||||||||
7565 | Derived &getDerived() { return static_cast<Derived&>(*this); } | ||||||||||
7566 | |||||||||||
7567 | /// Visit the expanded list of subobjects of the given type, as specified in | ||||||||||
7568 | /// C++2a [class.compare.default]. | ||||||||||
7569 | /// | ||||||||||
7570 | /// \return \c true if the ResultList object said we're done, \c false if not. | ||||||||||
7571 | bool visitSubobjects(ResultList &Results, CXXRecordDecl *Record, | ||||||||||
7572 | Qualifiers Quals) { | ||||||||||
7573 | // C++2a [class.compare.default]p4: | ||||||||||
7574 | // The direct base class subobjects of C | ||||||||||
7575 | for (CXXBaseSpecifier &Base : Record->bases()) | ||||||||||
7576 | if (Results.add(getDerived().visitSubobject( | ||||||||||
7577 | S.Context.getQualifiedType(Base.getType(), Quals), | ||||||||||
7578 | getDerived().getBase(&Base)))) | ||||||||||
7579 | return true; | ||||||||||
7580 | |||||||||||
7581 | // followed by the non-static data members of C | ||||||||||
7582 | for (FieldDecl *Field : Record->fields()) { | ||||||||||
7583 | // Recursively expand anonymous structs. | ||||||||||
7584 | if (Field->isAnonymousStructOrUnion()) { | ||||||||||
7585 | if (visitSubobjects(Results, Field->getType()->getAsCXXRecordDecl(), | ||||||||||
7586 | Quals)) | ||||||||||
7587 | return true; | ||||||||||
7588 | continue; | ||||||||||
7589 | } | ||||||||||
7590 | |||||||||||
7591 | // Figure out the type of an lvalue denoting this field. | ||||||||||
7592 | Qualifiers FieldQuals = Quals; | ||||||||||
7593 | if (Field->isMutable()) | ||||||||||
7594 | FieldQuals.removeConst(); | ||||||||||
7595 | QualType FieldType = | ||||||||||
7596 | S.Context.getQualifiedType(Field->getType(), FieldQuals); | ||||||||||
7597 | |||||||||||
7598 | if (Results.add(getDerived().visitSubobject( | ||||||||||
7599 | FieldType, getDerived().getField(Field)))) | ||||||||||
7600 | return true; | ||||||||||
7601 | } | ||||||||||
7602 | |||||||||||
7603 | // form a list of subobjects. | ||||||||||
7604 | return false; | ||||||||||
7605 | } | ||||||||||
7606 | |||||||||||
7607 | Result visitSubobject(QualType Type, Subobject Subobj) { | ||||||||||
7608 | // In that list, any subobject of array type is recursively expanded | ||||||||||
7609 | const ArrayType *AT = S.Context.getAsArrayType(Type); | ||||||||||
7610 | if (auto *CAT = dyn_cast_or_null<ConstantArrayType>(AT)) | ||||||||||
7611 | return getDerived().visitSubobjectArray(CAT->getElementType(), | ||||||||||
7612 | CAT->getSize(), Subobj); | ||||||||||
7613 | return getDerived().visitExpandedSubobject(Type, Subobj); | ||||||||||
7614 | } | ||||||||||
7615 | |||||||||||
7616 | Result visitSubobjectArray(QualType Type, const llvm::APInt &Size, | ||||||||||
7617 | Subobject Subobj) { | ||||||||||
7618 | return getDerived().visitSubobject(Type, Subobj); | ||||||||||
7619 | } | ||||||||||
7620 | |||||||||||
7621 | protected: | ||||||||||
7622 | Sema &S; | ||||||||||
7623 | CXXRecordDecl *RD; | ||||||||||
7624 | FunctionDecl *FD; | ||||||||||
7625 | DefaultedComparisonKind DCK; | ||||||||||
7626 | UnresolvedSet<16> Fns; | ||||||||||
7627 | }; | ||||||||||
7628 | |||||||||||
7629 | /// Information about a defaulted comparison, as determined by | ||||||||||
7630 | /// DefaultedComparisonAnalyzer. | ||||||||||
7631 | struct DefaultedComparisonInfo { | ||||||||||
7632 | bool Deleted = false; | ||||||||||
7633 | bool Constexpr = true; | ||||||||||
7634 | ComparisonCategoryType Category = ComparisonCategoryType::StrongOrdering; | ||||||||||
7635 | |||||||||||
7636 | static DefaultedComparisonInfo deleted() { | ||||||||||
7637 | DefaultedComparisonInfo Deleted; | ||||||||||
7638 | Deleted.Deleted = true; | ||||||||||
7639 | return Deleted; | ||||||||||
7640 | } | ||||||||||
7641 | |||||||||||
7642 | bool add(const DefaultedComparisonInfo &R) { | ||||||||||
7643 | Deleted |= R.Deleted; | ||||||||||
7644 | Constexpr &= R.Constexpr; | ||||||||||
7645 | Category = commonComparisonType(Category, R.Category); | ||||||||||
7646 | return Deleted; | ||||||||||
7647 | } | ||||||||||
7648 | }; | ||||||||||
7649 | |||||||||||
7650 | /// An element in the expanded list of subobjects of a defaulted comparison, as | ||||||||||
7651 | /// specified in C++2a [class.compare.default]p4. | ||||||||||
7652 | struct DefaultedComparisonSubobject { | ||||||||||
7653 | enum { CompleteObject, Member, Base } Kind; | ||||||||||
7654 | NamedDecl *Decl; | ||||||||||
7655 | SourceLocation Loc; | ||||||||||
7656 | }; | ||||||||||
7657 | |||||||||||
7658 | /// A visitor over the notional body of a defaulted comparison that determines | ||||||||||
7659 | /// whether that body would be deleted or constexpr. | ||||||||||
7660 | class DefaultedComparisonAnalyzer | ||||||||||
7661 | : public DefaultedComparisonVisitor<DefaultedComparisonAnalyzer, | ||||||||||
7662 | DefaultedComparisonInfo, | ||||||||||
7663 | DefaultedComparisonInfo, | ||||||||||
7664 | DefaultedComparisonSubobject> { | ||||||||||
7665 | public: | ||||||||||
7666 | enum DiagnosticKind { NoDiagnostics, ExplainDeleted, ExplainConstexpr }; | ||||||||||
7667 | |||||||||||
7668 | private: | ||||||||||
7669 | DiagnosticKind Diagnose; | ||||||||||
7670 | |||||||||||
7671 | public: | ||||||||||
7672 | using Base = DefaultedComparisonVisitor; | ||||||||||
7673 | using Result = DefaultedComparisonInfo; | ||||||||||
7674 | using Subobject = DefaultedComparisonSubobject; | ||||||||||
7675 | |||||||||||
7676 | friend Base; | ||||||||||
7677 | |||||||||||
7678 | DefaultedComparisonAnalyzer(Sema &S, CXXRecordDecl *RD, FunctionDecl *FD, | ||||||||||
7679 | DefaultedComparisonKind DCK, | ||||||||||
7680 | DiagnosticKind Diagnose = NoDiagnostics) | ||||||||||
7681 | : Base(S, RD, FD, DCK), Diagnose(Diagnose) {} | ||||||||||
7682 | |||||||||||
7683 | Result visit() { | ||||||||||
7684 | if ((DCK == DefaultedComparisonKind::Equal || | ||||||||||
7685 | DCK == DefaultedComparisonKind::ThreeWay) && | ||||||||||
7686 | RD->hasVariantMembers()) { | ||||||||||
7687 | // C++2a [class.compare.default]p2 [P2002R0]: | ||||||||||
7688 | // A defaulted comparison operator function for class C is defined as | ||||||||||
7689 | // deleted if [...] C has variant members. | ||||||||||
7690 | if (Diagnose == ExplainDeleted) { | ||||||||||
7691 | S.Diag(FD->getLocation(), diag::note_defaulted_comparison_union) | ||||||||||
7692 | << FD << RD->isUnion() << RD; | ||||||||||
7693 | } | ||||||||||
7694 | return Result::deleted(); | ||||||||||
7695 | } | ||||||||||
7696 | |||||||||||
7697 | return Base::visit(); | ||||||||||
7698 | } | ||||||||||
7699 | |||||||||||
7700 | private: | ||||||||||
7701 | Subobject getCompleteObject() { | ||||||||||
7702 | return Subobject{Subobject::CompleteObject, RD, FD->getLocation()}; | ||||||||||
7703 | } | ||||||||||
7704 | |||||||||||
7705 | Subobject getBase(CXXBaseSpecifier *Base) { | ||||||||||
7706 | return Subobject{Subobject::Base, Base->getType()->getAsCXXRecordDecl(), | ||||||||||
7707 | Base->getBaseTypeLoc()}; | ||||||||||
7708 | } | ||||||||||
7709 | |||||||||||
7710 | Subobject getField(FieldDecl *Field) { | ||||||||||
7711 | return Subobject{Subobject::Member, Field, Field->getLocation()}; | ||||||||||
7712 | } | ||||||||||
7713 | |||||||||||
7714 | Result visitExpandedSubobject(QualType Type, Subobject Subobj) { | ||||||||||
7715 | // C++2a [class.compare.default]p2 [P2002R0]: | ||||||||||
7716 | // A defaulted <=> or == operator function for class C is defined as | ||||||||||
7717 | // deleted if any non-static data member of C is of reference type | ||||||||||
7718 | if (Type->isReferenceType()) { | ||||||||||
7719 | if (Diagnose == ExplainDeleted) { | ||||||||||
7720 | S.Diag(Subobj.Loc, diag::note_defaulted_comparison_reference_member) | ||||||||||
7721 | << FD << RD; | ||||||||||
7722 | } | ||||||||||
7723 | return Result::deleted(); | ||||||||||
7724 | } | ||||||||||
7725 | |||||||||||
7726 | // [...] Let xi be an lvalue denoting the ith element [...] | ||||||||||
7727 | OpaqueValueExpr Xi(FD->getLocation(), Type, VK_LValue); | ||||||||||
7728 | Expr *Args[] = {&Xi, &Xi}; | ||||||||||
7729 | |||||||||||
7730 | // All operators start by trying to apply that same operator recursively. | ||||||||||
7731 | OverloadedOperatorKind OO = FD->getOverloadedOperator(); | ||||||||||
7732 | assert(OO != OO_None && "not an overloaded operator!")(static_cast <bool> (OO != OO_None && "not an overloaded operator!" ) ? void (0) : __assert_fail ("OO != OO_None && \"not an overloaded operator!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7732, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7733 | return visitBinaryOperator(OO, Args, Subobj); | ||||||||||
7734 | } | ||||||||||
7735 | |||||||||||
7736 | Result | ||||||||||
7737 | visitBinaryOperator(OverloadedOperatorKind OO, ArrayRef<Expr *> Args, | ||||||||||
7738 | Subobject Subobj, | ||||||||||
7739 | OverloadCandidateSet *SpaceshipCandidates = nullptr) { | ||||||||||
7740 | // Note that there is no need to consider rewritten candidates here if | ||||||||||
7741 | // we've already found there is no viable 'operator<=>' candidate (and are | ||||||||||
7742 | // considering synthesizing a '<=>' from '==' and '<'). | ||||||||||
7743 | OverloadCandidateSet CandidateSet( | ||||||||||
7744 | FD->getLocation(), OverloadCandidateSet::CSK_Operator, | ||||||||||
7745 | OverloadCandidateSet::OperatorRewriteInfo( | ||||||||||
7746 | OO, /*AllowRewrittenCandidates=*/!SpaceshipCandidates)); | ||||||||||
7747 | |||||||||||
7748 | /// C++2a [class.compare.default]p1 [P2002R0]: | ||||||||||
7749 | /// [...] the defaulted function itself is never a candidate for overload | ||||||||||
7750 | /// resolution [...] | ||||||||||
7751 | CandidateSet.exclude(FD); | ||||||||||
7752 | |||||||||||
7753 | if (Args[0]->getType()->isOverloadableType()) | ||||||||||
7754 | S.LookupOverloadedBinOp(CandidateSet, OO, Fns, Args); | ||||||||||
7755 | else | ||||||||||
7756 | // FIXME: We determine whether this is a valid expression by checking to | ||||||||||
7757 | // see if there's a viable builtin operator candidate for it. That isn't | ||||||||||
7758 | // really what the rules ask us to do, but should give the right results. | ||||||||||
7759 | S.AddBuiltinOperatorCandidates(OO, FD->getLocation(), Args, CandidateSet); | ||||||||||
7760 | |||||||||||
7761 | Result R; | ||||||||||
7762 | |||||||||||
7763 | OverloadCandidateSet::iterator Best; | ||||||||||
7764 | switch (CandidateSet.BestViableFunction(S, FD->getLocation(), Best)) { | ||||||||||
7765 | case OR_Success: { | ||||||||||
7766 | // C++2a [class.compare.secondary]p2 [P2002R0]: | ||||||||||
7767 | // The operator function [...] is defined as deleted if [...] the | ||||||||||
7768 | // candidate selected by overload resolution is not a rewritten | ||||||||||
7769 | // candidate. | ||||||||||
7770 | if ((DCK == DefaultedComparisonKind::NotEqual || | ||||||||||
7771 | DCK == DefaultedComparisonKind::Relational) && | ||||||||||
7772 | !Best->RewriteKind) { | ||||||||||
7773 | if (Diagnose == ExplainDeleted) { | ||||||||||
7774 | S.Diag(Best->Function->getLocation(), | ||||||||||
7775 | diag::note_defaulted_comparison_not_rewritten_callee) | ||||||||||
7776 | << FD; | ||||||||||
7777 | } | ||||||||||
7778 | return Result::deleted(); | ||||||||||
7779 | } | ||||||||||
7780 | |||||||||||
7781 | // Throughout C++2a [class.compare]: if overload resolution does not | ||||||||||
7782 | // result in a usable function, the candidate function is defined as | ||||||||||
7783 | // deleted. This requires that we selected an accessible function. | ||||||||||
7784 | // | ||||||||||
7785 | // Note that this only considers the access of the function when named | ||||||||||
7786 | // within the type of the subobject, and not the access path for any | ||||||||||
7787 | // derived-to-base conversion. | ||||||||||
7788 | CXXRecordDecl *ArgClass = Args[0]->getType()->getAsCXXRecordDecl(); | ||||||||||
7789 | if (ArgClass && Best->FoundDecl.getDecl() && | ||||||||||
7790 | Best->FoundDecl.getDecl()->isCXXClassMember()) { | ||||||||||
7791 | QualType ObjectType = Subobj.Kind == Subobject::Member | ||||||||||
7792 | ? Args[0]->getType() | ||||||||||
7793 | : S.Context.getRecordType(RD); | ||||||||||
7794 | if (!S.isMemberAccessibleForDeletion( | ||||||||||
7795 | ArgClass, Best->FoundDecl, ObjectType, Subobj.Loc, | ||||||||||
7796 | Diagnose == ExplainDeleted | ||||||||||
7797 | ? S.PDiag(diag::note_defaulted_comparison_inaccessible) | ||||||||||
7798 | << FD << Subobj.Kind << Subobj.Decl | ||||||||||
7799 | : S.PDiag())) | ||||||||||
7800 | return Result::deleted(); | ||||||||||
7801 | } | ||||||||||
7802 | |||||||||||
7803 | bool NeedsDeducing = | ||||||||||
7804 | OO == OO_Spaceship && FD->getReturnType()->isUndeducedAutoType(); | ||||||||||
7805 | |||||||||||
7806 | if (FunctionDecl *BestFD = Best->Function) { | ||||||||||
7807 | // C++2a [class.compare.default]p3 [P2002R0]: | ||||||||||
7808 | // A defaulted comparison function is constexpr-compatible if | ||||||||||
7809 | // [...] no overlod resolution performed [...] results in a | ||||||||||
7810 | // non-constexpr function. | ||||||||||
7811 | assert(!BestFD->isDeleted() && "wrong overload resolution result")(static_cast <bool> (!BestFD->isDeleted() && "wrong overload resolution result") ? void (0) : __assert_fail ("!BestFD->isDeleted() && \"wrong overload resolution result\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7811, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7812 | // If it's not constexpr, explain why not. | ||||||||||
7813 | if (Diagnose == ExplainConstexpr && !BestFD->isConstexpr()) { | ||||||||||
7814 | if (Subobj.Kind != Subobject::CompleteObject) | ||||||||||
7815 | S.Diag(Subobj.Loc, diag::note_defaulted_comparison_not_constexpr) | ||||||||||
7816 | << Subobj.Kind << Subobj.Decl; | ||||||||||
7817 | S.Diag(BestFD->getLocation(), | ||||||||||
7818 | diag::note_defaulted_comparison_not_constexpr_here); | ||||||||||
7819 | // Bail out after explaining; we don't want any more notes. | ||||||||||
7820 | return Result::deleted(); | ||||||||||
7821 | } | ||||||||||
7822 | R.Constexpr &= BestFD->isConstexpr(); | ||||||||||
7823 | |||||||||||
7824 | if (NeedsDeducing) { | ||||||||||
7825 | // If any callee has an undeduced return type, deduce it now. | ||||||||||
7826 | // FIXME: It's not clear how a failure here should be handled. For | ||||||||||
7827 | // now, we produce an eager diagnostic, because that is forward | ||||||||||
7828 | // compatible with most (all?) other reasonable options. | ||||||||||
7829 | if (BestFD->getReturnType()->isUndeducedType() && | ||||||||||
7830 | S.DeduceReturnType(BestFD, FD->getLocation(), | ||||||||||
7831 | /*Diagnose=*/false)) { | ||||||||||
7832 | // Don't produce a duplicate error when asked to explain why the | ||||||||||
7833 | // comparison is deleted: we diagnosed that when initially checking | ||||||||||
7834 | // the defaulted operator. | ||||||||||
7835 | if (Diagnose == NoDiagnostics) { | ||||||||||
7836 | S.Diag( | ||||||||||
7837 | FD->getLocation(), | ||||||||||
7838 | diag::err_defaulted_comparison_cannot_deduce_undeduced_auto) | ||||||||||
7839 | << Subobj.Kind << Subobj.Decl; | ||||||||||
7840 | S.Diag( | ||||||||||
7841 | Subobj.Loc, | ||||||||||
7842 | diag::note_defaulted_comparison_cannot_deduce_undeduced_auto) | ||||||||||
7843 | << Subobj.Kind << Subobj.Decl; | ||||||||||
7844 | S.Diag(BestFD->getLocation(), | ||||||||||
7845 | diag::note_defaulted_comparison_cannot_deduce_callee) | ||||||||||
7846 | << Subobj.Kind << Subobj.Decl; | ||||||||||
7847 | } | ||||||||||
7848 | return Result::deleted(); | ||||||||||
7849 | } | ||||||||||
7850 | auto *Info = S.Context.CompCategories.lookupInfoForType( | ||||||||||
7851 | BestFD->getCallResultType()); | ||||||||||
7852 | if (!Info) { | ||||||||||
7853 | if (Diagnose == ExplainDeleted) { | ||||||||||
7854 | S.Diag(Subobj.Loc, diag::note_defaulted_comparison_cannot_deduce) | ||||||||||
7855 | << Subobj.Kind << Subobj.Decl | ||||||||||
7856 | << BestFD->getCallResultType().withoutLocalFastQualifiers(); | ||||||||||
7857 | S.Diag(BestFD->getLocation(), | ||||||||||
7858 | diag::note_defaulted_comparison_cannot_deduce_callee) | ||||||||||
7859 | << Subobj.Kind << Subobj.Decl; | ||||||||||
7860 | } | ||||||||||
7861 | return Result::deleted(); | ||||||||||
7862 | } | ||||||||||
7863 | R.Category = Info->Kind; | ||||||||||
7864 | } | ||||||||||
7865 | } else { | ||||||||||
7866 | QualType T = Best->BuiltinParamTypes[0]; | ||||||||||
7867 | assert(T == Best->BuiltinParamTypes[1] &&(static_cast <bool> (T == Best->BuiltinParamTypes[1] && "builtin comparison for different types?") ? void (0) : __assert_fail ("T == Best->BuiltinParamTypes[1] && \"builtin comparison for different types?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7868, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
7868 | "builtin comparison for different types?")(static_cast <bool> (T == Best->BuiltinParamTypes[1] && "builtin comparison for different types?") ? void (0) : __assert_fail ("T == Best->BuiltinParamTypes[1] && \"builtin comparison for different types?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7868, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7869 | assert(Best->BuiltinParamTypes[2].isNull() &&(static_cast <bool> (Best->BuiltinParamTypes[2].isNull () && "invalid builtin comparison") ? void (0) : __assert_fail ("Best->BuiltinParamTypes[2].isNull() && \"invalid builtin comparison\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7870, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
7870 | "invalid builtin comparison")(static_cast <bool> (Best->BuiltinParamTypes[2].isNull () && "invalid builtin comparison") ? void (0) : __assert_fail ("Best->BuiltinParamTypes[2].isNull() && \"invalid builtin comparison\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7870, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7871 | |||||||||||
7872 | if (NeedsDeducing) { | ||||||||||
7873 | Optional<ComparisonCategoryType> Cat = | ||||||||||
7874 | getComparisonCategoryForBuiltinCmp(T); | ||||||||||
7875 | assert(Cat && "no category for builtin comparison?")(static_cast <bool> (Cat && "no category for builtin comparison?" ) ? void (0) : __assert_fail ("Cat && \"no category for builtin comparison?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 7875, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
7876 | R.Category = *Cat; | ||||||||||
7877 | } | ||||||||||
7878 | } | ||||||||||
7879 | |||||||||||
7880 | // Note that we might be rewriting to a different operator. That call is | ||||||||||
7881 | // not considered until we come to actually build the comparison function. | ||||||||||
7882 | break; | ||||||||||
7883 | } | ||||||||||
7884 | |||||||||||
7885 | case OR_Ambiguous: | ||||||||||
7886 | if (Diagnose == ExplainDeleted) { | ||||||||||
7887 | unsigned Kind = 0; | ||||||||||
7888 | if (FD->getOverloadedOperator() == OO_Spaceship && OO != OO_Spaceship) | ||||||||||
7889 | Kind = OO == OO_EqualEqual ? 1 : 2; | ||||||||||
7890 | CandidateSet.NoteCandidates( | ||||||||||
7891 | PartialDiagnosticAt( | ||||||||||
7892 | Subobj.Loc, S.PDiag(diag::note_defaulted_comparison_ambiguous) | ||||||||||
7893 | << FD << Kind << Subobj.Kind << Subobj.Decl), | ||||||||||
7894 | S, OCD_AmbiguousCandidates, Args); | ||||||||||
7895 | } | ||||||||||
7896 | R = Result::deleted(); | ||||||||||
7897 | break; | ||||||||||
7898 | |||||||||||
7899 | case OR_Deleted: | ||||||||||
7900 | if (Diagnose == ExplainDeleted) { | ||||||||||
7901 | if ((DCK == DefaultedComparisonKind::NotEqual || | ||||||||||
7902 | DCK == DefaultedComparisonKind::Relational) && | ||||||||||
7903 | !Best->RewriteKind) { | ||||||||||
7904 | S.Diag(Best->Function->getLocation(), | ||||||||||
7905 | diag::note_defaulted_comparison_not_rewritten_callee) | ||||||||||
7906 | << FD; | ||||||||||
7907 | } else { | ||||||||||
7908 | S.Diag(Subobj.Loc, | ||||||||||
7909 | diag::note_defaulted_comparison_calls_deleted) | ||||||||||
7910 | << FD << Subobj.Kind << Subobj.Decl; | ||||||||||
7911 | S.NoteDeletedFunction(Best->Function); | ||||||||||
7912 | } | ||||||||||
7913 | } | ||||||||||
7914 | R = Result::deleted(); | ||||||||||
7915 | break; | ||||||||||
7916 | |||||||||||
7917 | case OR_No_Viable_Function: | ||||||||||
7918 | // If there's no usable candidate, we're done unless we can rewrite a | ||||||||||
7919 | // '<=>' in terms of '==' and '<'. | ||||||||||
7920 | if (OO == OO_Spaceship && | ||||||||||
7921 | S.Context.CompCategories.lookupInfoForType(FD->getReturnType())) { | ||||||||||
7922 | // For any kind of comparison category return type, we need a usable | ||||||||||
7923 | // '==' and a usable '<'. | ||||||||||
7924 | if (!R.add(visitBinaryOperator(OO_EqualEqual, Args, Subobj, | ||||||||||
7925 | &CandidateSet))) | ||||||||||
7926 | R.add(visitBinaryOperator(OO_Less, Args, Subobj, &CandidateSet)); | ||||||||||
7927 | break; | ||||||||||
7928 | } | ||||||||||
7929 | |||||||||||
7930 | if (Diagnose == ExplainDeleted) { | ||||||||||
7931 | S.Diag(Subobj.Loc, diag::note_defaulted_comparison_no_viable_function) | ||||||||||
7932 | << FD << Subobj.Kind << Subobj.Decl; | ||||||||||
7933 | |||||||||||
7934 | // For a three-way comparison, list both the candidates for the | ||||||||||
7935 | // original operator and the candidates for the synthesized operator. | ||||||||||
7936 | if (SpaceshipCandidates) { | ||||||||||
7937 | SpaceshipCandidates->NoteCandidates( | ||||||||||
7938 | S, Args, | ||||||||||
7939 | SpaceshipCandidates->CompleteCandidates(S, OCD_AllCandidates, | ||||||||||
7940 | Args, FD->getLocation())); | ||||||||||
7941 | S.Diag(Subobj.Loc, | ||||||||||
7942 | diag::note_defaulted_comparison_no_viable_function_synthesized) | ||||||||||
7943 | << (OO == OO_EqualEqual ? 0 : 1); | ||||||||||
7944 | } | ||||||||||
7945 | |||||||||||
7946 | CandidateSet.NoteCandidates( | ||||||||||
7947 | S, Args, | ||||||||||
7948 | CandidateSet.CompleteCandidates(S, OCD_AllCandidates, Args, | ||||||||||
7949 | FD->getLocation())); | ||||||||||
7950 | } | ||||||||||
7951 | R = Result::deleted(); | ||||||||||
7952 | break; | ||||||||||
7953 | } | ||||||||||
7954 | |||||||||||
7955 | return R; | ||||||||||
7956 | } | ||||||||||
7957 | }; | ||||||||||
7958 | |||||||||||
7959 | /// A list of statements. | ||||||||||
7960 | struct StmtListResult { | ||||||||||
7961 | bool IsInvalid = false; | ||||||||||
7962 | llvm::SmallVector<Stmt*, 16> Stmts; | ||||||||||
7963 | |||||||||||
7964 | bool add(const StmtResult &S) { | ||||||||||
7965 | IsInvalid |= S.isInvalid(); | ||||||||||
7966 | if (IsInvalid) | ||||||||||
7967 | return true; | ||||||||||
7968 | Stmts.push_back(S.get()); | ||||||||||
7969 | return false; | ||||||||||
7970 | } | ||||||||||
7971 | }; | ||||||||||
7972 | |||||||||||
7973 | /// A visitor over the notional body of a defaulted comparison that synthesizes | ||||||||||
7974 | /// the actual body. | ||||||||||
7975 | class DefaultedComparisonSynthesizer | ||||||||||
7976 | : public DefaultedComparisonVisitor<DefaultedComparisonSynthesizer, | ||||||||||
7977 | StmtListResult, StmtResult, | ||||||||||
7978 | std::pair<ExprResult, ExprResult>> { | ||||||||||
7979 | SourceLocation Loc; | ||||||||||
7980 | unsigned ArrayDepth = 0; | ||||||||||
7981 | |||||||||||
7982 | public: | ||||||||||
7983 | using Base = DefaultedComparisonVisitor; | ||||||||||
7984 | using ExprPair = std::pair<ExprResult, ExprResult>; | ||||||||||
7985 | |||||||||||
7986 | friend Base; | ||||||||||
7987 | |||||||||||
7988 | DefaultedComparisonSynthesizer(Sema &S, CXXRecordDecl *RD, FunctionDecl *FD, | ||||||||||
7989 | DefaultedComparisonKind DCK, | ||||||||||
7990 | SourceLocation BodyLoc) | ||||||||||
7991 | : Base(S, RD, FD, DCK), Loc(BodyLoc) {} | ||||||||||
7992 | |||||||||||
7993 | /// Build a suitable function body for this defaulted comparison operator. | ||||||||||
7994 | StmtResult build() { | ||||||||||
7995 | Sema::CompoundScopeRAII CompoundScope(S); | ||||||||||
7996 | |||||||||||
7997 | StmtListResult Stmts = visit(); | ||||||||||
7998 | if (Stmts.IsInvalid) | ||||||||||
7999 | return StmtError(); | ||||||||||
8000 | |||||||||||
8001 | ExprResult RetVal; | ||||||||||
8002 | switch (DCK) { | ||||||||||
8003 | case DefaultedComparisonKind::None: | ||||||||||
8004 | llvm_unreachable("not a defaulted comparison")::llvm::llvm_unreachable_internal("not a defaulted comparison" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8004); | ||||||||||
8005 | |||||||||||
8006 | case DefaultedComparisonKind::Equal: { | ||||||||||
8007 | // C++2a [class.eq]p3: | ||||||||||
8008 | // [...] compar[e] the corresponding elements [...] until the first | ||||||||||
8009 | // index i where xi == yi yields [...] false. If no such index exists, | ||||||||||
8010 | // V is true. Otherwise, V is false. | ||||||||||
8011 | // | ||||||||||
8012 | // Join the comparisons with '&&'s and return the result. Use a right | ||||||||||
8013 | // fold (traversing the conditions right-to-left), because that | ||||||||||
8014 | // short-circuits more naturally. | ||||||||||
8015 | auto OldStmts = std::move(Stmts.Stmts); | ||||||||||
8016 | Stmts.Stmts.clear(); | ||||||||||
8017 | ExprResult CmpSoFar; | ||||||||||
8018 | // Finish a particular comparison chain. | ||||||||||
8019 | auto FinishCmp = [&] { | ||||||||||
8020 | if (Expr *Prior = CmpSoFar.get()) { | ||||||||||
8021 | // Convert the last expression to 'return ...;' | ||||||||||
8022 | if (RetVal.isUnset() && Stmts.Stmts.empty()) | ||||||||||
8023 | RetVal = CmpSoFar; | ||||||||||
8024 | // Convert any prior comparison to 'if (!(...)) return false;' | ||||||||||
8025 | else if (Stmts.add(buildIfNotCondReturnFalse(Prior))) | ||||||||||
8026 | return true; | ||||||||||
8027 | CmpSoFar = ExprResult(); | ||||||||||
8028 | } | ||||||||||
8029 | return false; | ||||||||||
8030 | }; | ||||||||||
8031 | for (Stmt *EAsStmt : llvm::reverse(OldStmts)) { | ||||||||||
8032 | Expr *E = dyn_cast<Expr>(EAsStmt); | ||||||||||
8033 | if (!E) { | ||||||||||
8034 | // Found an array comparison. | ||||||||||
8035 | if (FinishCmp() || Stmts.add(EAsStmt)) | ||||||||||
8036 | return StmtError(); | ||||||||||
8037 | continue; | ||||||||||
8038 | } | ||||||||||
8039 | |||||||||||
8040 | if (CmpSoFar.isUnset()) { | ||||||||||
8041 | CmpSoFar = E; | ||||||||||
8042 | continue; | ||||||||||
8043 | } | ||||||||||
8044 | CmpSoFar = S.CreateBuiltinBinOp(Loc, BO_LAnd, E, CmpSoFar.get()); | ||||||||||
8045 | if (CmpSoFar.isInvalid()) | ||||||||||
8046 | return StmtError(); | ||||||||||
8047 | } | ||||||||||
8048 | if (FinishCmp()) | ||||||||||
8049 | return StmtError(); | ||||||||||
8050 | std::reverse(Stmts.Stmts.begin(), Stmts.Stmts.end()); | ||||||||||
8051 | // If no such index exists, V is true. | ||||||||||
8052 | if (RetVal.isUnset()) | ||||||||||
8053 | RetVal = S.ActOnCXXBoolLiteral(Loc, tok::kw_true); | ||||||||||
8054 | break; | ||||||||||
8055 | } | ||||||||||
8056 | |||||||||||
8057 | case DefaultedComparisonKind::ThreeWay: { | ||||||||||
8058 | // Per C++2a [class.spaceship]p3, as a fallback add: | ||||||||||
8059 | // return static_cast<R>(std::strong_ordering::equal); | ||||||||||
8060 | QualType StrongOrdering = S.CheckComparisonCategoryType( | ||||||||||
8061 | ComparisonCategoryType::StrongOrdering, Loc, | ||||||||||
8062 | Sema::ComparisonCategoryUsage::DefaultedOperator); | ||||||||||
8063 | if (StrongOrdering.isNull()) | ||||||||||
8064 | return StmtError(); | ||||||||||
8065 | VarDecl *EqualVD = S.Context.CompCategories.getInfoForType(StrongOrdering) | ||||||||||
8066 | .getValueInfo(ComparisonCategoryResult::Equal) | ||||||||||
8067 | ->VD; | ||||||||||
8068 | RetVal = getDecl(EqualVD); | ||||||||||
8069 | if (RetVal.isInvalid()) | ||||||||||
8070 | return StmtError(); | ||||||||||
8071 | RetVal = buildStaticCastToR(RetVal.get()); | ||||||||||
8072 | break; | ||||||||||
8073 | } | ||||||||||
8074 | |||||||||||
8075 | case DefaultedComparisonKind::NotEqual: | ||||||||||
8076 | case DefaultedComparisonKind::Relational: | ||||||||||
8077 | RetVal = cast<Expr>(Stmts.Stmts.pop_back_val()); | ||||||||||
8078 | break; | ||||||||||
8079 | } | ||||||||||
8080 | |||||||||||
8081 | // Build the final return statement. | ||||||||||
8082 | if (RetVal.isInvalid()) | ||||||||||
8083 | return StmtError(); | ||||||||||
8084 | StmtResult ReturnStmt = S.BuildReturnStmt(Loc, RetVal.get()); | ||||||||||
8085 | if (ReturnStmt.isInvalid()) | ||||||||||
8086 | return StmtError(); | ||||||||||
8087 | Stmts.Stmts.push_back(ReturnStmt.get()); | ||||||||||
8088 | |||||||||||
8089 | return S.ActOnCompoundStmt(Loc, Loc, Stmts.Stmts, /*IsStmtExpr=*/false); | ||||||||||
8090 | } | ||||||||||
8091 | |||||||||||
8092 | private: | ||||||||||
8093 | ExprResult getDecl(ValueDecl *VD) { | ||||||||||
8094 | return S.BuildDeclarationNameExpr( | ||||||||||
8095 | CXXScopeSpec(), DeclarationNameInfo(VD->getDeclName(), Loc), VD); | ||||||||||
8096 | } | ||||||||||
8097 | |||||||||||
8098 | ExprResult getParam(unsigned I) { | ||||||||||
8099 | ParmVarDecl *PD = FD->getParamDecl(I); | ||||||||||
8100 | return getDecl(PD); | ||||||||||
8101 | } | ||||||||||
8102 | |||||||||||
8103 | ExprPair getCompleteObject() { | ||||||||||
8104 | unsigned Param = 0; | ||||||||||
8105 | ExprResult LHS; | ||||||||||
8106 | if (isa<CXXMethodDecl>(FD)) { | ||||||||||
8107 | // LHS is '*this'. | ||||||||||
8108 | LHS = S.ActOnCXXThis(Loc); | ||||||||||
8109 | if (!LHS.isInvalid()) | ||||||||||
8110 | LHS = S.CreateBuiltinUnaryOp(Loc, UO_Deref, LHS.get()); | ||||||||||
8111 | } else { | ||||||||||
8112 | LHS = getParam(Param++); | ||||||||||
8113 | } | ||||||||||
8114 | ExprResult RHS = getParam(Param++); | ||||||||||
8115 | assert(Param == FD->getNumParams())(static_cast <bool> (Param == FD->getNumParams()) ? void (0) : __assert_fail ("Param == FD->getNumParams()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8115, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8116 | return {LHS, RHS}; | ||||||||||
8117 | } | ||||||||||
8118 | |||||||||||
8119 | ExprPair getBase(CXXBaseSpecifier *Base) { | ||||||||||
8120 | ExprPair Obj = getCompleteObject(); | ||||||||||
8121 | if (Obj.first.isInvalid() || Obj.second.isInvalid()) | ||||||||||
8122 | return {ExprError(), ExprError()}; | ||||||||||
8123 | CXXCastPath Path = {Base}; | ||||||||||
8124 | return {S.ImpCastExprToType(Obj.first.get(), Base->getType(), | ||||||||||
8125 | CK_DerivedToBase, VK_LValue, &Path), | ||||||||||
8126 | S.ImpCastExprToType(Obj.second.get(), Base->getType(), | ||||||||||
8127 | CK_DerivedToBase, VK_LValue, &Path)}; | ||||||||||
8128 | } | ||||||||||
8129 | |||||||||||
8130 | ExprPair getField(FieldDecl *Field) { | ||||||||||
8131 | ExprPair Obj = getCompleteObject(); | ||||||||||
8132 | if (Obj.first.isInvalid() || Obj.second.isInvalid()) | ||||||||||
8133 | return {ExprError(), ExprError()}; | ||||||||||
8134 | |||||||||||
8135 | DeclAccessPair Found = DeclAccessPair::make(Field, Field->getAccess()); | ||||||||||
8136 | DeclarationNameInfo NameInfo(Field->getDeclName(), Loc); | ||||||||||
8137 | return {S.BuildFieldReferenceExpr(Obj.first.get(), /*IsArrow=*/false, Loc, | ||||||||||
8138 | CXXScopeSpec(), Field, Found, NameInfo), | ||||||||||
8139 | S.BuildFieldReferenceExpr(Obj.second.get(), /*IsArrow=*/false, Loc, | ||||||||||
8140 | CXXScopeSpec(), Field, Found, NameInfo)}; | ||||||||||
8141 | } | ||||||||||
8142 | |||||||||||
8143 | // FIXME: When expanding a subobject, register a note in the code synthesis | ||||||||||
8144 | // stack to say which subobject we're comparing. | ||||||||||
8145 | |||||||||||
8146 | StmtResult buildIfNotCondReturnFalse(ExprResult Cond) { | ||||||||||
8147 | if (Cond.isInvalid()) | ||||||||||
8148 | return StmtError(); | ||||||||||
8149 | |||||||||||
8150 | ExprResult NotCond = S.CreateBuiltinUnaryOp(Loc, UO_LNot, Cond.get()); | ||||||||||
8151 | if (NotCond.isInvalid()) | ||||||||||
8152 | return StmtError(); | ||||||||||
8153 | |||||||||||
8154 | ExprResult False = S.ActOnCXXBoolLiteral(Loc, tok::kw_false); | ||||||||||
8155 | assert(!False.isInvalid() && "should never fail")(static_cast <bool> (!False.isInvalid() && "should never fail" ) ? void (0) : __assert_fail ("!False.isInvalid() && \"should never fail\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8155, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8156 | StmtResult ReturnFalse = S.BuildReturnStmt(Loc, False.get()); | ||||||||||
8157 | if (ReturnFalse.isInvalid()) | ||||||||||
8158 | return StmtError(); | ||||||||||
8159 | |||||||||||
8160 | return S.ActOnIfStmt(Loc, false, Loc, nullptr, | ||||||||||
8161 | S.ActOnCondition(nullptr, Loc, NotCond.get(), | ||||||||||
8162 | Sema::ConditionKind::Boolean), | ||||||||||
8163 | Loc, ReturnFalse.get(), SourceLocation(), nullptr); | ||||||||||
8164 | } | ||||||||||
8165 | |||||||||||
8166 | StmtResult visitSubobjectArray(QualType Type, llvm::APInt Size, | ||||||||||
8167 | ExprPair Subobj) { | ||||||||||
8168 | QualType SizeType = S.Context.getSizeType(); | ||||||||||
8169 | Size = Size.zextOrTrunc(S.Context.getTypeSize(SizeType)); | ||||||||||
8170 | |||||||||||
8171 | // Build 'size_t i$n = 0'. | ||||||||||
8172 | IdentifierInfo *IterationVarName = nullptr; | ||||||||||
8173 | { | ||||||||||
8174 | SmallString<8> Str; | ||||||||||
8175 | llvm::raw_svector_ostream OS(Str); | ||||||||||
8176 | OS << "i" << ArrayDepth; | ||||||||||
8177 | IterationVarName = &S.Context.Idents.get(OS.str()); | ||||||||||
8178 | } | ||||||||||
8179 | VarDecl *IterationVar = VarDecl::Create( | ||||||||||
8180 | S.Context, S.CurContext, Loc, Loc, IterationVarName, SizeType, | ||||||||||
8181 | S.Context.getTrivialTypeSourceInfo(SizeType, Loc), SC_None); | ||||||||||
8182 | llvm::APInt Zero(S.Context.getTypeSize(SizeType), 0); | ||||||||||
8183 | IterationVar->setInit( | ||||||||||
8184 | IntegerLiteral::Create(S.Context, Zero, SizeType, Loc)); | ||||||||||
8185 | Stmt *Init = new (S.Context) DeclStmt(DeclGroupRef(IterationVar), Loc, Loc); | ||||||||||
8186 | |||||||||||
8187 | auto IterRef = [&] { | ||||||||||
8188 | ExprResult Ref = S.BuildDeclarationNameExpr( | ||||||||||
8189 | CXXScopeSpec(), DeclarationNameInfo(IterationVarName, Loc), | ||||||||||
8190 | IterationVar); | ||||||||||
8191 | assert(!Ref.isInvalid() && "can't reference our own variable?")(static_cast <bool> (!Ref.isInvalid() && "can't reference our own variable?" ) ? void (0) : __assert_fail ("!Ref.isInvalid() && \"can't reference our own variable?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8191, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8192 | return Ref.get(); | ||||||||||
8193 | }; | ||||||||||
8194 | |||||||||||
8195 | // Build 'i$n != Size'. | ||||||||||
8196 | ExprResult Cond = S.CreateBuiltinBinOp( | ||||||||||
8197 | Loc, BO_NE, IterRef(), | ||||||||||
8198 | IntegerLiteral::Create(S.Context, Size, SizeType, Loc)); | ||||||||||
8199 | assert(!Cond.isInvalid() && "should never fail")(static_cast <bool> (!Cond.isInvalid() && "should never fail" ) ? void (0) : __assert_fail ("!Cond.isInvalid() && \"should never fail\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8199, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8200 | |||||||||||
8201 | // Build '++i$n'. | ||||||||||
8202 | ExprResult Inc = S.CreateBuiltinUnaryOp(Loc, UO_PreInc, IterRef()); | ||||||||||
8203 | assert(!Inc.isInvalid() && "should never fail")(static_cast <bool> (!Inc.isInvalid() && "should never fail" ) ? void (0) : __assert_fail ("!Inc.isInvalid() && \"should never fail\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8203, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8204 | |||||||||||
8205 | // Build 'a[i$n]' and 'b[i$n]'. | ||||||||||
8206 | auto Index = [&](ExprResult E) { | ||||||||||
8207 | if (E.isInvalid()) | ||||||||||
8208 | return ExprError(); | ||||||||||
8209 | return S.CreateBuiltinArraySubscriptExpr(E.get(), Loc, IterRef(), Loc); | ||||||||||
8210 | }; | ||||||||||
8211 | Subobj.first = Index(Subobj.first); | ||||||||||
8212 | Subobj.second = Index(Subobj.second); | ||||||||||
8213 | |||||||||||
8214 | // Compare the array elements. | ||||||||||
8215 | ++ArrayDepth; | ||||||||||
8216 | StmtResult Substmt = visitSubobject(Type, Subobj); | ||||||||||
8217 | --ArrayDepth; | ||||||||||
8218 | |||||||||||
8219 | if (Substmt.isInvalid()) | ||||||||||
8220 | return StmtError(); | ||||||||||
8221 | |||||||||||
8222 | // For the inner level of an 'operator==', build 'if (!cmp) return false;'. | ||||||||||
8223 | // For outer levels or for an 'operator<=>' we already have a suitable | ||||||||||
8224 | // statement that returns as necessary. | ||||||||||
8225 | if (Expr *ElemCmp = dyn_cast<Expr>(Substmt.get())) { | ||||||||||
8226 | assert(DCK == DefaultedComparisonKind::Equal &&(static_cast <bool> (DCK == DefaultedComparisonKind::Equal && "should have non-expression statement") ? void (0 ) : __assert_fail ("DCK == DefaultedComparisonKind::Equal && \"should have non-expression statement\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8227, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
8227 | "should have non-expression statement")(static_cast <bool> (DCK == DefaultedComparisonKind::Equal && "should have non-expression statement") ? void (0 ) : __assert_fail ("DCK == DefaultedComparisonKind::Equal && \"should have non-expression statement\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8227, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8228 | Substmt = buildIfNotCondReturnFalse(ElemCmp); | ||||||||||
8229 | if (Substmt.isInvalid()) | ||||||||||
8230 | return StmtError(); | ||||||||||
8231 | } | ||||||||||
8232 | |||||||||||
8233 | // Build 'for (...) ...' | ||||||||||
8234 | return S.ActOnForStmt(Loc, Loc, Init, | ||||||||||
8235 | S.ActOnCondition(nullptr, Loc, Cond.get(), | ||||||||||
8236 | Sema::ConditionKind::Boolean), | ||||||||||
8237 | S.MakeFullDiscardedValueExpr(Inc.get()), Loc, | ||||||||||
8238 | Substmt.get()); | ||||||||||
8239 | } | ||||||||||
8240 | |||||||||||
8241 | StmtResult visitExpandedSubobject(QualType Type, ExprPair Obj) { | ||||||||||
8242 | if (Obj.first.isInvalid() || Obj.second.isInvalid()) | ||||||||||
8243 | return StmtError(); | ||||||||||
8244 | |||||||||||
8245 | OverloadedOperatorKind OO = FD->getOverloadedOperator(); | ||||||||||
8246 | BinaryOperatorKind Opc = BinaryOperator::getOverloadedOpcode(OO); | ||||||||||
8247 | ExprResult Op; | ||||||||||
8248 | if (Type->isOverloadableType()) | ||||||||||
8249 | Op = S.CreateOverloadedBinOp(Loc, Opc, Fns, Obj.first.get(), | ||||||||||
8250 | Obj.second.get(), /*PerformADL=*/true, | ||||||||||
8251 | /*AllowRewrittenCandidates=*/true, FD); | ||||||||||
8252 | else | ||||||||||
8253 | Op = S.CreateBuiltinBinOp(Loc, Opc, Obj.first.get(), Obj.second.get()); | ||||||||||
8254 | if (Op.isInvalid()) | ||||||||||
8255 | return StmtError(); | ||||||||||
8256 | |||||||||||
8257 | switch (DCK) { | ||||||||||
8258 | case DefaultedComparisonKind::None: | ||||||||||
8259 | llvm_unreachable("not a defaulted comparison")::llvm::llvm_unreachable_internal("not a defaulted comparison" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8259); | ||||||||||
8260 | |||||||||||
8261 | case DefaultedComparisonKind::Equal: | ||||||||||
8262 | // Per C++2a [class.eq]p2, each comparison is individually contextually | ||||||||||
8263 | // converted to bool. | ||||||||||
8264 | Op = S.PerformContextuallyConvertToBool(Op.get()); | ||||||||||
8265 | if (Op.isInvalid()) | ||||||||||
8266 | return StmtError(); | ||||||||||
8267 | return Op.get(); | ||||||||||
8268 | |||||||||||
8269 | case DefaultedComparisonKind::ThreeWay: { | ||||||||||
8270 | // Per C++2a [class.spaceship]p3, form: | ||||||||||
8271 | // if (R cmp = static_cast<R>(op); cmp != 0) | ||||||||||
8272 | // return cmp; | ||||||||||
8273 | QualType R = FD->getReturnType(); | ||||||||||
8274 | Op = buildStaticCastToR(Op.get()); | ||||||||||
8275 | if (Op.isInvalid()) | ||||||||||
8276 | return StmtError(); | ||||||||||
8277 | |||||||||||
8278 | // R cmp = ...; | ||||||||||
8279 | IdentifierInfo *Name = &S.Context.Idents.get("cmp"); | ||||||||||
8280 | VarDecl *VD = | ||||||||||
8281 | VarDecl::Create(S.Context, S.CurContext, Loc, Loc, Name, R, | ||||||||||
8282 | S.Context.getTrivialTypeSourceInfo(R, Loc), SC_None); | ||||||||||
8283 | S.AddInitializerToDecl(VD, Op.get(), /*DirectInit=*/false); | ||||||||||
8284 | Stmt *InitStmt = new (S.Context) DeclStmt(DeclGroupRef(VD), Loc, Loc); | ||||||||||
8285 | |||||||||||
8286 | // cmp != 0 | ||||||||||
8287 | ExprResult VDRef = getDecl(VD); | ||||||||||
8288 | if (VDRef.isInvalid()) | ||||||||||
8289 | return StmtError(); | ||||||||||
8290 | llvm::APInt ZeroVal(S.Context.getIntWidth(S.Context.IntTy), 0); | ||||||||||
8291 | Expr *Zero = | ||||||||||
8292 | IntegerLiteral::Create(S.Context, ZeroVal, S.Context.IntTy, Loc); | ||||||||||
8293 | ExprResult Comp; | ||||||||||
8294 | if (VDRef.get()->getType()->isOverloadableType()) | ||||||||||
8295 | Comp = S.CreateOverloadedBinOp(Loc, BO_NE, Fns, VDRef.get(), Zero, true, | ||||||||||
8296 | true, FD); | ||||||||||
8297 | else | ||||||||||
8298 | Comp = S.CreateBuiltinBinOp(Loc, BO_NE, VDRef.get(), Zero); | ||||||||||
8299 | if (Comp.isInvalid()) | ||||||||||
8300 | return StmtError(); | ||||||||||
8301 | Sema::ConditionResult Cond = S.ActOnCondition( | ||||||||||
8302 | nullptr, Loc, Comp.get(), Sema::ConditionKind::Boolean); | ||||||||||
8303 | if (Cond.isInvalid()) | ||||||||||
8304 | return StmtError(); | ||||||||||
8305 | |||||||||||
8306 | // return cmp; | ||||||||||
8307 | VDRef = getDecl(VD); | ||||||||||
8308 | if (VDRef.isInvalid()) | ||||||||||
8309 | return StmtError(); | ||||||||||
8310 | StmtResult ReturnStmt = S.BuildReturnStmt(Loc, VDRef.get()); | ||||||||||
8311 | if (ReturnStmt.isInvalid()) | ||||||||||
8312 | return StmtError(); | ||||||||||
8313 | |||||||||||
8314 | // if (...) | ||||||||||
8315 | return S.ActOnIfStmt(Loc, /*IsConstexpr=*/false, Loc, InitStmt, Cond, Loc, | ||||||||||
8316 | ReturnStmt.get(), | ||||||||||
8317 | /*ElseLoc=*/SourceLocation(), /*Else=*/nullptr); | ||||||||||
8318 | } | ||||||||||
8319 | |||||||||||
8320 | case DefaultedComparisonKind::NotEqual: | ||||||||||
8321 | case DefaultedComparisonKind::Relational: | ||||||||||
8322 | // C++2a [class.compare.secondary]p2: | ||||||||||
8323 | // Otherwise, the operator function yields x @ y. | ||||||||||
8324 | return Op.get(); | ||||||||||
8325 | } | ||||||||||
8326 | llvm_unreachable("")::llvm::llvm_unreachable_internal("", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8326); | ||||||||||
8327 | } | ||||||||||
8328 | |||||||||||
8329 | /// Build "static_cast<R>(E)". | ||||||||||
8330 | ExprResult buildStaticCastToR(Expr *E) { | ||||||||||
8331 | QualType R = FD->getReturnType(); | ||||||||||
8332 | assert(!R->isUndeducedType() && "type should have been deduced already")(static_cast <bool> (!R->isUndeducedType() && "type should have been deduced already") ? void (0) : __assert_fail ("!R->isUndeducedType() && \"type should have been deduced already\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8332, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8333 | |||||||||||
8334 | // Don't bother forming a no-op cast in the common case. | ||||||||||
8335 | if (E->isPRValue() && S.Context.hasSameType(E->getType(), R)) | ||||||||||
8336 | return E; | ||||||||||
8337 | return S.BuildCXXNamedCast(Loc, tok::kw_static_cast, | ||||||||||
8338 | S.Context.getTrivialTypeSourceInfo(R, Loc), E, | ||||||||||
8339 | SourceRange(Loc, Loc), SourceRange(Loc, Loc)); | ||||||||||
8340 | } | ||||||||||
8341 | }; | ||||||||||
8342 | } | ||||||||||
8343 | |||||||||||
8344 | /// Perform the unqualified lookups that might be needed to form a defaulted | ||||||||||
8345 | /// comparison function for the given operator. | ||||||||||
8346 | static void lookupOperatorsForDefaultedComparison(Sema &Self, Scope *S, | ||||||||||
8347 | UnresolvedSetImpl &Operators, | ||||||||||
8348 | OverloadedOperatorKind Op) { | ||||||||||
8349 | auto Lookup = [&](OverloadedOperatorKind OO) { | ||||||||||
8350 | Self.LookupOverloadedOperatorName(OO, S, Operators); | ||||||||||
8351 | }; | ||||||||||
8352 | |||||||||||
8353 | // Every defaulted operator looks up itself. | ||||||||||
8354 | Lookup(Op); | ||||||||||
8355 | // ... and the rewritten form of itself, if any. | ||||||||||
8356 | if (OverloadedOperatorKind ExtraOp = getRewrittenOverloadedOperator(Op)) | ||||||||||
8357 | Lookup(ExtraOp); | ||||||||||
8358 | |||||||||||
8359 | // For 'operator<=>', we also form a 'cmp != 0' expression, and might | ||||||||||
8360 | // synthesize a three-way comparison from '<' and '=='. In a dependent | ||||||||||
8361 | // context, we also need to look up '==' in case we implicitly declare a | ||||||||||
8362 | // defaulted 'operator=='. | ||||||||||
8363 | if (Op == OO_Spaceship) { | ||||||||||
8364 | Lookup(OO_ExclaimEqual); | ||||||||||
8365 | Lookup(OO_Less); | ||||||||||
8366 | Lookup(OO_EqualEqual); | ||||||||||
8367 | } | ||||||||||
8368 | } | ||||||||||
8369 | |||||||||||
8370 | bool Sema::CheckExplicitlyDefaultedComparison(Scope *S, FunctionDecl *FD, | ||||||||||
8371 | DefaultedComparisonKind DCK) { | ||||||||||
8372 | assert(DCK != DefaultedComparisonKind::None && "not a defaulted comparison")(static_cast <bool> (DCK != DefaultedComparisonKind::None && "not a defaulted comparison") ? void (0) : __assert_fail ("DCK != DefaultedComparisonKind::None && \"not a defaulted comparison\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8372, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8373 | |||||||||||
8374 | CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(FD->getLexicalDeclContext()); | ||||||||||
8375 | assert(RD && "defaulted comparison is not defaulted in a class")(static_cast <bool> (RD && "defaulted comparison is not defaulted in a class" ) ? void (0) : __assert_fail ("RD && \"defaulted comparison is not defaulted in a class\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8375, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8376 | |||||||||||
8377 | // Perform any unqualified lookups we're going to need to default this | ||||||||||
8378 | // function. | ||||||||||
8379 | if (S) { | ||||||||||
8380 | UnresolvedSet<32> Operators; | ||||||||||
8381 | lookupOperatorsForDefaultedComparison(*this, S, Operators, | ||||||||||
8382 | FD->getOverloadedOperator()); | ||||||||||
8383 | FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create( | ||||||||||
8384 | Context, Operators.pairs())); | ||||||||||
8385 | } | ||||||||||
8386 | |||||||||||
8387 | // C++2a [class.compare.default]p1: | ||||||||||
8388 | // A defaulted comparison operator function for some class C shall be a | ||||||||||
8389 | // non-template function declared in the member-specification of C that is | ||||||||||
8390 | // -- a non-static const member of C having one parameter of type | ||||||||||
8391 | // const C&, or | ||||||||||
8392 | // -- a friend of C having two parameters of type const C& or two | ||||||||||
8393 | // parameters of type C. | ||||||||||
8394 | QualType ExpectedParmType1 = Context.getRecordType(RD); | ||||||||||
8395 | QualType ExpectedParmType2 = | ||||||||||
8396 | Context.getLValueReferenceType(ExpectedParmType1.withConst()); | ||||||||||
8397 | if (isa<CXXMethodDecl>(FD)) | ||||||||||
8398 | ExpectedParmType1 = ExpectedParmType2; | ||||||||||
8399 | for (const ParmVarDecl *Param : FD->parameters()) { | ||||||||||
8400 | if (!Param->getType()->isDependentType() && | ||||||||||
8401 | !Context.hasSameType(Param->getType(), ExpectedParmType1) && | ||||||||||
8402 | !Context.hasSameType(Param->getType(), ExpectedParmType2)) { | ||||||||||
8403 | // Don't diagnose an implicit 'operator=='; we will have diagnosed the | ||||||||||
8404 | // corresponding defaulted 'operator<=>' already. | ||||||||||
8405 | if (!FD->isImplicit()) { | ||||||||||
8406 | Diag(FD->getLocation(), diag::err_defaulted_comparison_param) | ||||||||||
8407 | << (int)DCK << Param->getType() << ExpectedParmType1 | ||||||||||
8408 | << !isa<CXXMethodDecl>(FD) | ||||||||||
8409 | << ExpectedParmType2 << Param->getSourceRange(); | ||||||||||
8410 | } | ||||||||||
8411 | return true; | ||||||||||
8412 | } | ||||||||||
8413 | } | ||||||||||
8414 | if (FD->getNumParams() == 2 && | ||||||||||
8415 | !Context.hasSameType(FD->getParamDecl(0)->getType(), | ||||||||||
8416 | FD->getParamDecl(1)->getType())) { | ||||||||||
8417 | if (!FD->isImplicit()) { | ||||||||||
8418 | Diag(FD->getLocation(), diag::err_defaulted_comparison_param_mismatch) | ||||||||||
8419 | << (int)DCK | ||||||||||
8420 | << FD->getParamDecl(0)->getType() | ||||||||||
8421 | << FD->getParamDecl(0)->getSourceRange() | ||||||||||
8422 | << FD->getParamDecl(1)->getType() | ||||||||||
8423 | << FD->getParamDecl(1)->getSourceRange(); | ||||||||||
8424 | } | ||||||||||
8425 | return true; | ||||||||||
8426 | } | ||||||||||
8427 | |||||||||||
8428 | // ... non-static const member ... | ||||||||||
8429 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||||||
8430 | assert(!MD->isStatic() && "comparison function cannot be a static member")(static_cast <bool> (!MD->isStatic() && "comparison function cannot be a static member" ) ? void (0) : __assert_fail ("!MD->isStatic() && \"comparison function cannot be a static member\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8430, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8431 | if (!MD->isConst()) { | ||||||||||
8432 | SourceLocation InsertLoc; | ||||||||||
8433 | if (FunctionTypeLoc Loc = MD->getFunctionTypeLoc()) | ||||||||||
8434 | InsertLoc = getLocForEndOfToken(Loc.getRParenLoc()); | ||||||||||
8435 | // Don't diagnose an implicit 'operator=='; we will have diagnosed the | ||||||||||
8436 | // corresponding defaulted 'operator<=>' already. | ||||||||||
8437 | if (!MD->isImplicit()) { | ||||||||||
8438 | Diag(MD->getLocation(), diag::err_defaulted_comparison_non_const) | ||||||||||
8439 | << (int)DCK << FixItHint::CreateInsertion(InsertLoc, " const"); | ||||||||||
8440 | } | ||||||||||
8441 | |||||||||||
8442 | // Add the 'const' to the type to recover. | ||||||||||
8443 | const auto *FPT = MD->getType()->castAs<FunctionProtoType>(); | ||||||||||
8444 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||||||||
8445 | EPI.TypeQuals.addConst(); | ||||||||||
8446 | MD->setType(Context.getFunctionType(FPT->getReturnType(), | ||||||||||
8447 | FPT->getParamTypes(), EPI)); | ||||||||||
8448 | } | ||||||||||
8449 | } else { | ||||||||||
8450 | // A non-member function declared in a class must be a friend. | ||||||||||
8451 | assert(FD->getFriendObjectKind() && "expected a friend declaration")(static_cast <bool> (FD->getFriendObjectKind() && "expected a friend declaration") ? void (0) : __assert_fail ( "FD->getFriendObjectKind() && \"expected a friend declaration\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8451, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8452 | } | ||||||||||
8453 | |||||||||||
8454 | // C++2a [class.eq]p1, [class.rel]p1: | ||||||||||
8455 | // A [defaulted comparison other than <=>] shall have a declared return | ||||||||||
8456 | // type bool. | ||||||||||
8457 | if (DCK != DefaultedComparisonKind::ThreeWay && | ||||||||||
8458 | !FD->getDeclaredReturnType()->isDependentType() && | ||||||||||
8459 | !Context.hasSameType(FD->getDeclaredReturnType(), Context.BoolTy)) { | ||||||||||
8460 | Diag(FD->getLocation(), diag::err_defaulted_comparison_return_type_not_bool) | ||||||||||
8461 | << (int)DCK << FD->getDeclaredReturnType() << Context.BoolTy | ||||||||||
8462 | << FD->getReturnTypeSourceRange(); | ||||||||||
8463 | return true; | ||||||||||
8464 | } | ||||||||||
8465 | // C++2a [class.spaceship]p2 [P2002R0]: | ||||||||||
8466 | // Let R be the declared return type [...]. If R is auto, [...]. Otherwise, | ||||||||||
8467 | // R shall not contain a placeholder type. | ||||||||||
8468 | if (DCK == DefaultedComparisonKind::ThreeWay && | ||||||||||
8469 | FD->getDeclaredReturnType()->getContainedDeducedType() && | ||||||||||
8470 | !Context.hasSameType(FD->getDeclaredReturnType(), | ||||||||||
8471 | Context.getAutoDeductType())) { | ||||||||||
8472 | Diag(FD->getLocation(), | ||||||||||
8473 | diag::err_defaulted_comparison_deduced_return_type_not_auto) | ||||||||||
8474 | << (int)DCK << FD->getDeclaredReturnType() << Context.AutoDeductTy | ||||||||||
8475 | << FD->getReturnTypeSourceRange(); | ||||||||||
8476 | return true; | ||||||||||
8477 | } | ||||||||||
8478 | |||||||||||
8479 | // For a defaulted function in a dependent class, defer all remaining checks | ||||||||||
8480 | // until instantiation. | ||||||||||
8481 | if (RD->isDependentType()) | ||||||||||
8482 | return false; | ||||||||||
8483 | |||||||||||
8484 | // Determine whether the function should be defined as deleted. | ||||||||||
8485 | DefaultedComparisonInfo Info = | ||||||||||
8486 | DefaultedComparisonAnalyzer(*this, RD, FD, DCK).visit(); | ||||||||||
8487 | |||||||||||
8488 | bool First = FD == FD->getCanonicalDecl(); | ||||||||||
8489 | |||||||||||
8490 | // If we want to delete the function, then do so; there's nothing else to | ||||||||||
8491 | // check in that case. | ||||||||||
8492 | if (Info.Deleted) { | ||||||||||
8493 | if (!First) { | ||||||||||
8494 | // C++11 [dcl.fct.def.default]p4: | ||||||||||
8495 | // [For a] user-provided explicitly-defaulted function [...] if such a | ||||||||||
8496 | // function is implicitly defined as deleted, the program is ill-formed. | ||||||||||
8497 | // | ||||||||||
8498 | // This is really just a consequence of the general rule that you can | ||||||||||
8499 | // only delete a function on its first declaration. | ||||||||||
8500 | Diag(FD->getLocation(), diag::err_non_first_default_compare_deletes) | ||||||||||
8501 | << FD->isImplicit() << (int)DCK; | ||||||||||
8502 | DefaultedComparisonAnalyzer(*this, RD, FD, DCK, | ||||||||||
8503 | DefaultedComparisonAnalyzer::ExplainDeleted) | ||||||||||
8504 | .visit(); | ||||||||||
8505 | return true; | ||||||||||
8506 | } | ||||||||||
8507 | |||||||||||
8508 | SetDeclDeleted(FD, FD->getLocation()); | ||||||||||
8509 | if (!inTemplateInstantiation() && !FD->isImplicit()) { | ||||||||||
8510 | Diag(FD->getLocation(), diag::warn_defaulted_comparison_deleted) | ||||||||||
8511 | << (int)DCK; | ||||||||||
8512 | DefaultedComparisonAnalyzer(*this, RD, FD, DCK, | ||||||||||
8513 | DefaultedComparisonAnalyzer::ExplainDeleted) | ||||||||||
8514 | .visit(); | ||||||||||
8515 | } | ||||||||||
8516 | return false; | ||||||||||
8517 | } | ||||||||||
8518 | |||||||||||
8519 | // C++2a [class.spaceship]p2: | ||||||||||
8520 | // The return type is deduced as the common comparison type of R0, R1, ... | ||||||||||
8521 | if (DCK == DefaultedComparisonKind::ThreeWay && | ||||||||||
8522 | FD->getDeclaredReturnType()->isUndeducedAutoType()) { | ||||||||||
8523 | SourceLocation RetLoc = FD->getReturnTypeSourceRange().getBegin(); | ||||||||||
8524 | if (RetLoc.isInvalid()) | ||||||||||
8525 | RetLoc = FD->getBeginLoc(); | ||||||||||
8526 | // FIXME: Should we really care whether we have the complete type and the | ||||||||||
8527 | // 'enumerator' constants here? A forward declaration seems sufficient. | ||||||||||
8528 | QualType Cat = CheckComparisonCategoryType( | ||||||||||
8529 | Info.Category, RetLoc, ComparisonCategoryUsage::DefaultedOperator); | ||||||||||
8530 | if (Cat.isNull()) | ||||||||||
8531 | return true; | ||||||||||
8532 | Context.adjustDeducedFunctionResultType( | ||||||||||
8533 | FD, SubstAutoType(FD->getDeclaredReturnType(), Cat)); | ||||||||||
8534 | } | ||||||||||
8535 | |||||||||||
8536 | // C++2a [dcl.fct.def.default]p3 [P2002R0]: | ||||||||||
8537 | // An explicitly-defaulted function that is not defined as deleted may be | ||||||||||
8538 | // declared constexpr or consteval only if it is constexpr-compatible. | ||||||||||
8539 | // C++2a [class.compare.default]p3 [P2002R0]: | ||||||||||
8540 | // A defaulted comparison function is constexpr-compatible if it satisfies | ||||||||||
8541 | // the requirements for a constexpr function [...] | ||||||||||
8542 | // The only relevant requirements are that the parameter and return types are | ||||||||||
8543 | // literal types. The remaining conditions are checked by the analyzer. | ||||||||||
8544 | if (FD->isConstexpr()) { | ||||||||||
8545 | if (CheckConstexprReturnType(*this, FD, CheckConstexprKind::Diagnose) && | ||||||||||
8546 | CheckConstexprParameterTypes(*this, FD, CheckConstexprKind::Diagnose) && | ||||||||||
8547 | !Info.Constexpr) { | ||||||||||
8548 | Diag(FD->getBeginLoc(), | ||||||||||
8549 | diag::err_incorrect_defaulted_comparison_constexpr) | ||||||||||
8550 | << FD->isImplicit() << (int)DCK << FD->isConsteval(); | ||||||||||
8551 | DefaultedComparisonAnalyzer(*this, RD, FD, DCK, | ||||||||||
8552 | DefaultedComparisonAnalyzer::ExplainConstexpr) | ||||||||||
8553 | .visit(); | ||||||||||
8554 | } | ||||||||||
8555 | } | ||||||||||
8556 | |||||||||||
8557 | // C++2a [dcl.fct.def.default]p3 [P2002R0]: | ||||||||||
8558 | // If a constexpr-compatible function is explicitly defaulted on its first | ||||||||||
8559 | // declaration, it is implicitly considered to be constexpr. | ||||||||||
8560 | // FIXME: Only applying this to the first declaration seems problematic, as | ||||||||||
8561 | // simple reorderings can affect the meaning of the program. | ||||||||||
8562 | if (First && !FD->isConstexpr() && Info.Constexpr) | ||||||||||
8563 | FD->setConstexprKind(ConstexprSpecKind::Constexpr); | ||||||||||
8564 | |||||||||||
8565 | // C++2a [except.spec]p3: | ||||||||||
8566 | // If a declaration of a function does not have a noexcept-specifier | ||||||||||
8567 | // [and] is defaulted on its first declaration, [...] the exception | ||||||||||
8568 | // specification is as specified below | ||||||||||
8569 | if (FD->getExceptionSpecType() == EST_None) { | ||||||||||
8570 | auto *FPT = FD->getType()->castAs<FunctionProtoType>(); | ||||||||||
8571 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||||||||
8572 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||||||
8573 | EPI.ExceptionSpec.SourceDecl = FD; | ||||||||||
8574 | FD->setType(Context.getFunctionType(FPT->getReturnType(), | ||||||||||
8575 | FPT->getParamTypes(), EPI)); | ||||||||||
8576 | } | ||||||||||
8577 | |||||||||||
8578 | return false; | ||||||||||
8579 | } | ||||||||||
8580 | |||||||||||
8581 | void Sema::DeclareImplicitEqualityComparison(CXXRecordDecl *RD, | ||||||||||
8582 | FunctionDecl *Spaceship) { | ||||||||||
8583 | Sema::CodeSynthesisContext Ctx; | ||||||||||
8584 | Ctx.Kind = Sema::CodeSynthesisContext::DeclaringImplicitEqualityComparison; | ||||||||||
8585 | Ctx.PointOfInstantiation = Spaceship->getEndLoc(); | ||||||||||
8586 | Ctx.Entity = Spaceship; | ||||||||||
8587 | pushCodeSynthesisContext(Ctx); | ||||||||||
8588 | |||||||||||
8589 | if (FunctionDecl *EqualEqual = SubstSpaceshipAsEqualEqual(RD, Spaceship)) | ||||||||||
8590 | EqualEqual->setImplicit(); | ||||||||||
8591 | |||||||||||
8592 | popCodeSynthesisContext(); | ||||||||||
8593 | } | ||||||||||
8594 | |||||||||||
8595 | void Sema::DefineDefaultedComparison(SourceLocation UseLoc, FunctionDecl *FD, | ||||||||||
8596 | DefaultedComparisonKind DCK) { | ||||||||||
8597 | assert(FD->isDefaulted() && !FD->isDeleted() &&(static_cast <bool> (FD->isDefaulted() && !FD ->isDeleted() && !FD->doesThisDeclarationHaveABody ()) ? void (0) : __assert_fail ("FD->isDefaulted() && !FD->isDeleted() && !FD->doesThisDeclarationHaveABody()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8598, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
8598 | !FD->doesThisDeclarationHaveABody())(static_cast <bool> (FD->isDefaulted() && !FD ->isDeleted() && !FD->doesThisDeclarationHaveABody ()) ? void (0) : __assert_fail ("FD->isDefaulted() && !FD->isDeleted() && !FD->doesThisDeclarationHaveABody()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8598, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8599 | if (FD->willHaveBody() || FD->isInvalidDecl()) | ||||||||||
8600 | return; | ||||||||||
8601 | |||||||||||
8602 | SynthesizedFunctionScope Scope(*this, FD); | ||||||||||
8603 | |||||||||||
8604 | // Add a context note for diagnostics produced after this point. | ||||||||||
8605 | Scope.addContextNote(UseLoc); | ||||||||||
8606 | |||||||||||
8607 | { | ||||||||||
8608 | // Build and set up the function body. | ||||||||||
8609 | CXXRecordDecl *RD = cast<CXXRecordDecl>(FD->getLexicalParent()); | ||||||||||
8610 | SourceLocation BodyLoc = | ||||||||||
8611 | FD->getEndLoc().isValid() ? FD->getEndLoc() : FD->getLocation(); | ||||||||||
8612 | StmtResult Body = | ||||||||||
8613 | DefaultedComparisonSynthesizer(*this, RD, FD, DCK, BodyLoc).build(); | ||||||||||
8614 | if (Body.isInvalid()) { | ||||||||||
8615 | FD->setInvalidDecl(); | ||||||||||
8616 | return; | ||||||||||
8617 | } | ||||||||||
8618 | FD->setBody(Body.get()); | ||||||||||
8619 | FD->markUsed(Context); | ||||||||||
8620 | } | ||||||||||
8621 | |||||||||||
8622 | // The exception specification is needed because we are defining the | ||||||||||
8623 | // function. Note that this will reuse the body we just built. | ||||||||||
8624 | ResolveExceptionSpec(UseLoc, FD->getType()->castAs<FunctionProtoType>()); | ||||||||||
8625 | |||||||||||
8626 | if (ASTMutationListener *L = getASTMutationListener()) | ||||||||||
8627 | L->CompletedImplicitDefinition(FD); | ||||||||||
8628 | } | ||||||||||
8629 | |||||||||||
8630 | static Sema::ImplicitExceptionSpecification | ||||||||||
8631 | ComputeDefaultedComparisonExceptionSpec(Sema &S, SourceLocation Loc, | ||||||||||
8632 | FunctionDecl *FD, | ||||||||||
8633 | Sema::DefaultedComparisonKind DCK) { | ||||||||||
8634 | ComputingExceptionSpec CES(S, FD, Loc); | ||||||||||
8635 | Sema::ImplicitExceptionSpecification ExceptSpec(S); | ||||||||||
8636 | |||||||||||
8637 | if (FD->isInvalidDecl()) | ||||||||||
8638 | return ExceptSpec; | ||||||||||
8639 | |||||||||||
8640 | // The common case is that we just defined the comparison function. In that | ||||||||||
8641 | // case, just look at whether the body can throw. | ||||||||||
8642 | if (FD->hasBody()) { | ||||||||||
8643 | ExceptSpec.CalledStmt(FD->getBody()); | ||||||||||
8644 | } else { | ||||||||||
8645 | // Otherwise, build a body so we can check it. This should ideally only | ||||||||||
8646 | // happen when we're not actually marking the function referenced. (This is | ||||||||||
8647 | // only really important for efficiency: we don't want to build and throw | ||||||||||
8648 | // away bodies for comparison functions more than we strictly need to.) | ||||||||||
8649 | |||||||||||
8650 | // Pretend to synthesize the function body in an unevaluated context. | ||||||||||
8651 | // Note that we can't actually just go ahead and define the function here: | ||||||||||
8652 | // we are not permitted to mark its callees as referenced. | ||||||||||
8653 | Sema::SynthesizedFunctionScope Scope(S, FD); | ||||||||||
8654 | EnterExpressionEvaluationContext Context( | ||||||||||
8655 | S, Sema::ExpressionEvaluationContext::Unevaluated); | ||||||||||
8656 | |||||||||||
8657 | CXXRecordDecl *RD = cast<CXXRecordDecl>(FD->getLexicalParent()); | ||||||||||
8658 | SourceLocation BodyLoc = | ||||||||||
8659 | FD->getEndLoc().isValid() ? FD->getEndLoc() : FD->getLocation(); | ||||||||||
8660 | StmtResult Body = | ||||||||||
8661 | DefaultedComparisonSynthesizer(S, RD, FD, DCK, BodyLoc).build(); | ||||||||||
8662 | if (!Body.isInvalid()) | ||||||||||
8663 | ExceptSpec.CalledStmt(Body.get()); | ||||||||||
8664 | |||||||||||
8665 | // FIXME: Can we hold onto this body and just transform it to potentially | ||||||||||
8666 | // evaluated when we're asked to define the function rather than rebuilding | ||||||||||
8667 | // it? Either that, or we should only build the bits of the body that we | ||||||||||
8668 | // need (the expressions, not the statements). | ||||||||||
8669 | } | ||||||||||
8670 | |||||||||||
8671 | return ExceptSpec; | ||||||||||
8672 | } | ||||||||||
8673 | |||||||||||
8674 | void Sema::CheckDelayedMemberExceptionSpecs() { | ||||||||||
8675 | decltype(DelayedOverridingExceptionSpecChecks) Overriding; | ||||||||||
8676 | decltype(DelayedEquivalentExceptionSpecChecks) Equivalent; | ||||||||||
8677 | |||||||||||
8678 | std::swap(Overriding, DelayedOverridingExceptionSpecChecks); | ||||||||||
8679 | std::swap(Equivalent, DelayedEquivalentExceptionSpecChecks); | ||||||||||
8680 | |||||||||||
8681 | // Perform any deferred checking of exception specifications for virtual | ||||||||||
8682 | // destructors. | ||||||||||
8683 | for (auto &Check : Overriding) | ||||||||||
8684 | CheckOverridingFunctionExceptionSpec(Check.first, Check.second); | ||||||||||
8685 | |||||||||||
8686 | // Perform any deferred checking of exception specifications for befriended | ||||||||||
8687 | // special members. | ||||||||||
8688 | for (auto &Check : Equivalent) | ||||||||||
8689 | CheckEquivalentExceptionSpec(Check.second, Check.first); | ||||||||||
8690 | } | ||||||||||
8691 | |||||||||||
8692 | namespace { | ||||||||||
8693 | /// CRTP base class for visiting operations performed by a special member | ||||||||||
8694 | /// function (or inherited constructor). | ||||||||||
8695 | template<typename Derived> | ||||||||||
8696 | struct SpecialMemberVisitor { | ||||||||||
8697 | Sema &S; | ||||||||||
8698 | CXXMethodDecl *MD; | ||||||||||
8699 | Sema::CXXSpecialMember CSM; | ||||||||||
8700 | Sema::InheritedConstructorInfo *ICI; | ||||||||||
8701 | |||||||||||
8702 | // Properties of the special member, computed for convenience. | ||||||||||
8703 | bool IsConstructor = false, IsAssignment = false, ConstArg = false; | ||||||||||
8704 | |||||||||||
8705 | SpecialMemberVisitor(Sema &S, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||||||||
8706 | Sema::InheritedConstructorInfo *ICI) | ||||||||||
8707 | : S(S), MD(MD), CSM(CSM), ICI(ICI) { | ||||||||||
8708 | switch (CSM) { | ||||||||||
8709 | case Sema::CXXDefaultConstructor: | ||||||||||
8710 | case Sema::CXXCopyConstructor: | ||||||||||
8711 | case Sema::CXXMoveConstructor: | ||||||||||
8712 | IsConstructor = true; | ||||||||||
8713 | break; | ||||||||||
8714 | case Sema::CXXCopyAssignment: | ||||||||||
8715 | case Sema::CXXMoveAssignment: | ||||||||||
8716 | IsAssignment = true; | ||||||||||
8717 | break; | ||||||||||
8718 | case Sema::CXXDestructor: | ||||||||||
8719 | break; | ||||||||||
8720 | case Sema::CXXInvalid: | ||||||||||
8721 | llvm_unreachable("invalid special member kind")::llvm::llvm_unreachable_internal("invalid special member kind" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8721); | ||||||||||
8722 | } | ||||||||||
8723 | |||||||||||
8724 | if (MD->getNumParams()) { | ||||||||||
8725 | if (const ReferenceType *RT = | ||||||||||
8726 | MD->getParamDecl(0)->getType()->getAs<ReferenceType>()) | ||||||||||
8727 | ConstArg = RT->getPointeeType().isConstQualified(); | ||||||||||
8728 | } | ||||||||||
8729 | } | ||||||||||
8730 | |||||||||||
8731 | Derived &getDerived() { return static_cast<Derived&>(*this); } | ||||||||||
8732 | |||||||||||
8733 | /// Is this a "move" special member? | ||||||||||
8734 | bool isMove() const { | ||||||||||
8735 | return CSM == Sema::CXXMoveConstructor || CSM == Sema::CXXMoveAssignment; | ||||||||||
8736 | } | ||||||||||
8737 | |||||||||||
8738 | /// Look up the corresponding special member in the given class. | ||||||||||
8739 | Sema::SpecialMemberOverloadResult lookupIn(CXXRecordDecl *Class, | ||||||||||
8740 | unsigned Quals, bool IsMutable) { | ||||||||||
8741 | return lookupCallFromSpecialMember(S, Class, CSM, Quals, | ||||||||||
8742 | ConstArg && !IsMutable); | ||||||||||
8743 | } | ||||||||||
8744 | |||||||||||
8745 | /// Look up the constructor for the specified base class to see if it's | ||||||||||
8746 | /// overridden due to this being an inherited constructor. | ||||||||||
8747 | Sema::SpecialMemberOverloadResult lookupInheritedCtor(CXXRecordDecl *Class) { | ||||||||||
8748 | if (!ICI) | ||||||||||
8749 | return {}; | ||||||||||
8750 | assert(CSM == Sema::CXXDefaultConstructor)(static_cast <bool> (CSM == Sema::CXXDefaultConstructor ) ? void (0) : __assert_fail ("CSM == Sema::CXXDefaultConstructor" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 8750, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
8751 | auto *BaseCtor = | ||||||||||
8752 | cast<CXXConstructorDecl>(MD)->getInheritedConstructor().getConstructor(); | ||||||||||
8753 | if (auto *MD = ICI->findConstructorForBase(Class, BaseCtor).first) | ||||||||||
8754 | return MD; | ||||||||||
8755 | return {}; | ||||||||||
8756 | } | ||||||||||
8757 | |||||||||||
8758 | /// A base or member subobject. | ||||||||||
8759 | typedef llvm::PointerUnion<CXXBaseSpecifier*, FieldDecl*> Subobject; | ||||||||||
8760 | |||||||||||
8761 | /// Get the location to use for a subobject in diagnostics. | ||||||||||
8762 | static SourceLocation getSubobjectLoc(Subobject Subobj) { | ||||||||||
8763 | // FIXME: For an indirect virtual base, the direct base leading to | ||||||||||
8764 | // the indirect virtual base would be a more useful choice. | ||||||||||
8765 | if (auto *B = Subobj.dyn_cast<CXXBaseSpecifier*>()) | ||||||||||
8766 | return B->getBaseTypeLoc(); | ||||||||||
8767 | else | ||||||||||
8768 | return Subobj.get<FieldDecl*>()->getLocation(); | ||||||||||
8769 | } | ||||||||||
8770 | |||||||||||
8771 | enum BasesToVisit { | ||||||||||
8772 | /// Visit all non-virtual (direct) bases. | ||||||||||
8773 | VisitNonVirtualBases, | ||||||||||
8774 | /// Visit all direct bases, virtual or not. | ||||||||||
8775 | VisitDirectBases, | ||||||||||
8776 | /// Visit all non-virtual bases, and all virtual bases if the class | ||||||||||
8777 | /// is not abstract. | ||||||||||
8778 | VisitPotentiallyConstructedBases, | ||||||||||
8779 | /// Visit all direct or virtual bases. | ||||||||||
8780 | VisitAllBases | ||||||||||
8781 | }; | ||||||||||
8782 | |||||||||||
8783 | // Visit the bases and members of the class. | ||||||||||
8784 | bool visit(BasesToVisit Bases) { | ||||||||||
8785 | CXXRecordDecl *RD = MD->getParent(); | ||||||||||
8786 | |||||||||||
8787 | if (Bases == VisitPotentiallyConstructedBases) | ||||||||||
8788 | Bases = RD->isAbstract() ? VisitNonVirtualBases : VisitAllBases; | ||||||||||
8789 | |||||||||||
8790 | for (auto &B : RD->bases()) | ||||||||||
8791 | if ((Bases == VisitDirectBases || !B.isVirtual()) && | ||||||||||
8792 | getDerived().visitBase(&B)) | ||||||||||
8793 | return true; | ||||||||||
8794 | |||||||||||
8795 | if (Bases == VisitAllBases) | ||||||||||
8796 | for (auto &B : RD->vbases()) | ||||||||||
8797 | if (getDerived().visitBase(&B)) | ||||||||||
8798 | return true; | ||||||||||
8799 | |||||||||||
8800 | for (auto *F : RD->fields()) | ||||||||||
8801 | if (!F->isInvalidDecl() && !F->isUnnamedBitfield() && | ||||||||||
8802 | getDerived().visitField(F)) | ||||||||||
8803 | return true; | ||||||||||
8804 | |||||||||||
8805 | return false; | ||||||||||
8806 | } | ||||||||||
8807 | }; | ||||||||||
8808 | } | ||||||||||
8809 | |||||||||||
8810 | namespace { | ||||||||||
8811 | struct SpecialMemberDeletionInfo | ||||||||||
8812 | : SpecialMemberVisitor<SpecialMemberDeletionInfo> { | ||||||||||
8813 | bool Diagnose; | ||||||||||
8814 | |||||||||||
8815 | SourceLocation Loc; | ||||||||||
8816 | |||||||||||
8817 | bool AllFieldsAreConst; | ||||||||||
8818 | |||||||||||
8819 | SpecialMemberDeletionInfo(Sema &S, CXXMethodDecl *MD, | ||||||||||
8820 | Sema::CXXSpecialMember CSM, | ||||||||||
8821 | Sema::InheritedConstructorInfo *ICI, bool Diagnose) | ||||||||||
8822 | : SpecialMemberVisitor(S, MD, CSM, ICI), Diagnose(Diagnose), | ||||||||||
8823 | Loc(MD->getLocation()), AllFieldsAreConst(true) {} | ||||||||||
8824 | |||||||||||
8825 | bool inUnion() const { return MD->getParent()->isUnion(); } | ||||||||||
8826 | |||||||||||
8827 | Sema::CXXSpecialMember getEffectiveCSM() { | ||||||||||
8828 | return ICI ? Sema::CXXInvalid : CSM; | ||||||||||
8829 | } | ||||||||||
8830 | |||||||||||
8831 | bool shouldDeleteForVariantObjCPtrMember(FieldDecl *FD, QualType FieldType); | ||||||||||
8832 | |||||||||||
8833 | bool visitBase(CXXBaseSpecifier *Base) { return shouldDeleteForBase(Base); } | ||||||||||
8834 | bool visitField(FieldDecl *Field) { return shouldDeleteForField(Field); } | ||||||||||
8835 | |||||||||||
8836 | bool shouldDeleteForBase(CXXBaseSpecifier *Base); | ||||||||||
8837 | bool shouldDeleteForField(FieldDecl *FD); | ||||||||||
8838 | bool shouldDeleteForAllConstMembers(); | ||||||||||
8839 | |||||||||||
8840 | bool shouldDeleteForClassSubobject(CXXRecordDecl *Class, Subobject Subobj, | ||||||||||
8841 | unsigned Quals); | ||||||||||
8842 | bool shouldDeleteForSubobjectCall(Subobject Subobj, | ||||||||||
8843 | Sema::SpecialMemberOverloadResult SMOR, | ||||||||||
8844 | bool IsDtorCallInCtor); | ||||||||||
8845 | |||||||||||
8846 | bool isAccessible(Subobject Subobj, CXXMethodDecl *D); | ||||||||||
8847 | }; | ||||||||||
8848 | } | ||||||||||
8849 | |||||||||||
8850 | /// Is the given special member inaccessible when used on the given | ||||||||||
8851 | /// sub-object. | ||||||||||
8852 | bool SpecialMemberDeletionInfo::isAccessible(Subobject Subobj, | ||||||||||
8853 | CXXMethodDecl *target) { | ||||||||||
8854 | /// If we're operating on a base class, the object type is the | ||||||||||
8855 | /// type of this special member. | ||||||||||
8856 | QualType objectTy; | ||||||||||
8857 | AccessSpecifier access = target->getAccess(); | ||||||||||
8858 | if (CXXBaseSpecifier *base = Subobj.dyn_cast<CXXBaseSpecifier*>()) { | ||||||||||
8859 | objectTy = S.Context.getTypeDeclType(MD->getParent()); | ||||||||||
8860 | access = CXXRecordDecl::MergeAccess(base->getAccessSpecifier(), access); | ||||||||||
8861 | |||||||||||
8862 | // If we're operating on a field, the object type is the type of the field. | ||||||||||
8863 | } else { | ||||||||||
8864 | objectTy = S.Context.getTypeDeclType(target->getParent()); | ||||||||||
8865 | } | ||||||||||
8866 | |||||||||||
8867 | return S.isMemberAccessibleForDeletion( | ||||||||||
8868 | target->getParent(), DeclAccessPair::make(target, access), objectTy); | ||||||||||
8869 | } | ||||||||||
8870 | |||||||||||
8871 | /// Check whether we should delete a special member due to the implicit | ||||||||||
8872 | /// definition containing a call to a special member of a subobject. | ||||||||||
8873 | bool SpecialMemberDeletionInfo::shouldDeleteForSubobjectCall( | ||||||||||
8874 | Subobject Subobj, Sema::SpecialMemberOverloadResult SMOR, | ||||||||||
8875 | bool IsDtorCallInCtor) { | ||||||||||
8876 | CXXMethodDecl *Decl = SMOR.getMethod(); | ||||||||||
8877 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||||||||
8878 | |||||||||||
8879 | int DiagKind = -1; | ||||||||||
8880 | |||||||||||
8881 | if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted) | ||||||||||
8882 | DiagKind = !Decl ? 0 : 1; | ||||||||||
8883 | else if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous) | ||||||||||
8884 | DiagKind = 2; | ||||||||||
8885 | else if (!isAccessible(Subobj, Decl)) | ||||||||||
8886 | DiagKind = 3; | ||||||||||
8887 | else if (!IsDtorCallInCtor && Field && Field->getParent()->isUnion() && | ||||||||||
8888 | !Decl->isTrivial()) { | ||||||||||
8889 | // A member of a union must have a trivial corresponding special member. | ||||||||||
8890 | // As a weird special case, a destructor call from a union's constructor | ||||||||||
8891 | // must be accessible and non-deleted, but need not be trivial. Such a | ||||||||||
8892 | // destructor is never actually called, but is semantically checked as | ||||||||||
8893 | // if it were. | ||||||||||
8894 | DiagKind = 4; | ||||||||||
8895 | } | ||||||||||
8896 | |||||||||||
8897 | if (DiagKind == -1) | ||||||||||
8898 | return false; | ||||||||||
8899 | |||||||||||
8900 | if (Diagnose) { | ||||||||||
8901 | if (Field) { | ||||||||||
8902 | S.Diag(Field->getLocation(), | ||||||||||
8903 | diag::note_deleted_special_member_class_subobject) | ||||||||||
8904 | << getEffectiveCSM() << MD->getParent() << /*IsField*/true | ||||||||||
8905 | << Field << DiagKind << IsDtorCallInCtor << /*IsObjCPtr*/false; | ||||||||||
8906 | } else { | ||||||||||
8907 | CXXBaseSpecifier *Base = Subobj.get<CXXBaseSpecifier*>(); | ||||||||||
8908 | S.Diag(Base->getBeginLoc(), | ||||||||||
8909 | diag::note_deleted_special_member_class_subobject) | ||||||||||
8910 | << getEffectiveCSM() << MD->getParent() << /*IsField*/ false | ||||||||||
8911 | << Base->getType() << DiagKind << IsDtorCallInCtor | ||||||||||
8912 | << /*IsObjCPtr*/false; | ||||||||||
8913 | } | ||||||||||
8914 | |||||||||||
8915 | if (DiagKind == 1) | ||||||||||
8916 | S.NoteDeletedFunction(Decl); | ||||||||||
8917 | // FIXME: Explain inaccessibility if DiagKind == 3. | ||||||||||
8918 | } | ||||||||||
8919 | |||||||||||
8920 | return true; | ||||||||||
8921 | } | ||||||||||
8922 | |||||||||||
8923 | /// Check whether we should delete a special member function due to having a | ||||||||||
8924 | /// direct or virtual base class or non-static data member of class type M. | ||||||||||
8925 | bool SpecialMemberDeletionInfo::shouldDeleteForClassSubobject( | ||||||||||
8926 | CXXRecordDecl *Class, Subobject Subobj, unsigned Quals) { | ||||||||||
8927 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||||||||
8928 | bool IsMutable = Field && Field->isMutable(); | ||||||||||
8929 | |||||||||||
8930 | // C++11 [class.ctor]p5: | ||||||||||
8931 | // -- any direct or virtual base class, or non-static data member with no | ||||||||||
8932 | // brace-or-equal-initializer, has class type M (or array thereof) and | ||||||||||
8933 | // either M has no default constructor or overload resolution as applied | ||||||||||
8934 | // to M's default constructor results in an ambiguity or in a function | ||||||||||
8935 | // that is deleted or inaccessible | ||||||||||
8936 | // C++11 [class.copy]p11, C++11 [class.copy]p23: | ||||||||||
8937 | // -- a direct or virtual base class B that cannot be copied/moved because | ||||||||||
8938 | // overload resolution, as applied to B's corresponding special member, | ||||||||||
8939 | // results in an ambiguity or a function that is deleted or inaccessible | ||||||||||
8940 | // from the defaulted special member | ||||||||||
8941 | // C++11 [class.dtor]p5: | ||||||||||
8942 | // -- any direct or virtual base class [...] has a type with a destructor | ||||||||||
8943 | // that is deleted or inaccessible | ||||||||||
8944 | if (!(CSM == Sema::CXXDefaultConstructor && | ||||||||||
8945 | Field && Field->hasInClassInitializer()) && | ||||||||||
8946 | shouldDeleteForSubobjectCall(Subobj, lookupIn(Class, Quals, IsMutable), | ||||||||||
8947 | false)) | ||||||||||
8948 | return true; | ||||||||||
8949 | |||||||||||
8950 | // C++11 [class.ctor]p5, C++11 [class.copy]p11: | ||||||||||
8951 | // -- any direct or virtual base class or non-static data member has a | ||||||||||
8952 | // type with a destructor that is deleted or inaccessible | ||||||||||
8953 | if (IsConstructor) { | ||||||||||
8954 | Sema::SpecialMemberOverloadResult SMOR = | ||||||||||
8955 | S.LookupSpecialMember(Class, Sema::CXXDestructor, | ||||||||||
8956 | false, false, false, false, false); | ||||||||||
8957 | if (shouldDeleteForSubobjectCall(Subobj, SMOR, true)) | ||||||||||
8958 | return true; | ||||||||||
8959 | } | ||||||||||
8960 | |||||||||||
8961 | return false; | ||||||||||
8962 | } | ||||||||||
8963 | |||||||||||
8964 | bool SpecialMemberDeletionInfo::shouldDeleteForVariantObjCPtrMember( | ||||||||||
8965 | FieldDecl *FD, QualType FieldType) { | ||||||||||
8966 | // The defaulted special functions are defined as deleted if this is a variant | ||||||||||
8967 | // member with a non-trivial ownership type, e.g., ObjC __strong or __weak | ||||||||||
8968 | // type under ARC. | ||||||||||
8969 | if (!FieldType.hasNonTrivialObjCLifetime()) | ||||||||||
8970 | return false; | ||||||||||
8971 | |||||||||||
8972 | // Don't make the defaulted default constructor defined as deleted if the | ||||||||||
8973 | // member has an in-class initializer. | ||||||||||
8974 | if (CSM == Sema::CXXDefaultConstructor && FD->hasInClassInitializer()) | ||||||||||
8975 | return false; | ||||||||||
8976 | |||||||||||
8977 | if (Diagnose) { | ||||||||||
8978 | auto *ParentClass = cast<CXXRecordDecl>(FD->getParent()); | ||||||||||
8979 | S.Diag(FD->getLocation(), | ||||||||||
8980 | diag::note_deleted_special_member_class_subobject) | ||||||||||
8981 | << getEffectiveCSM() << ParentClass << /*IsField*/true | ||||||||||
8982 | << FD << 4 << /*IsDtorCallInCtor*/false << /*IsObjCPtr*/true; | ||||||||||
8983 | } | ||||||||||
8984 | |||||||||||
8985 | return true; | ||||||||||
8986 | } | ||||||||||
8987 | |||||||||||
8988 | /// Check whether we should delete a special member function due to the class | ||||||||||
8989 | /// having a particular direct or virtual base class. | ||||||||||
8990 | bool SpecialMemberDeletionInfo::shouldDeleteForBase(CXXBaseSpecifier *Base) { | ||||||||||
8991 | CXXRecordDecl *BaseClass = Base->getType()->getAsCXXRecordDecl(); | ||||||||||
8992 | // If program is correct, BaseClass cannot be null, but if it is, the error | ||||||||||
8993 | // must be reported elsewhere. | ||||||||||
8994 | if (!BaseClass) | ||||||||||
8995 | return false; | ||||||||||
8996 | // If we have an inheriting constructor, check whether we're calling an | ||||||||||
8997 | // inherited constructor instead of a default constructor. | ||||||||||
8998 | Sema::SpecialMemberOverloadResult SMOR = lookupInheritedCtor(BaseClass); | ||||||||||
8999 | if (auto *BaseCtor = SMOR.getMethod()) { | ||||||||||
9000 | // Note that we do not check access along this path; other than that, | ||||||||||
9001 | // this is the same as shouldDeleteForSubobjectCall(Base, BaseCtor, false); | ||||||||||
9002 | // FIXME: Check that the base has a usable destructor! Sink this into | ||||||||||
9003 | // shouldDeleteForClassSubobject. | ||||||||||
9004 | if (BaseCtor->isDeleted() && Diagnose) { | ||||||||||
9005 | S.Diag(Base->getBeginLoc(), | ||||||||||
9006 | diag::note_deleted_special_member_class_subobject) | ||||||||||
9007 | << getEffectiveCSM() << MD->getParent() << /*IsField*/ false | ||||||||||
9008 | << Base->getType() << /*Deleted*/ 1 << /*IsDtorCallInCtor*/ false | ||||||||||
9009 | << /*IsObjCPtr*/false; | ||||||||||
9010 | S.NoteDeletedFunction(BaseCtor); | ||||||||||
9011 | } | ||||||||||
9012 | return BaseCtor->isDeleted(); | ||||||||||
9013 | } | ||||||||||
9014 | return shouldDeleteForClassSubobject(BaseClass, Base, 0); | ||||||||||
9015 | } | ||||||||||
9016 | |||||||||||
9017 | /// Check whether we should delete a special member function due to the class | ||||||||||
9018 | /// having a particular non-static data member. | ||||||||||
9019 | bool SpecialMemberDeletionInfo::shouldDeleteForField(FieldDecl *FD) { | ||||||||||
9020 | QualType FieldType = S.Context.getBaseElementType(FD->getType()); | ||||||||||
9021 | CXXRecordDecl *FieldRecord = FieldType->getAsCXXRecordDecl(); | ||||||||||
9022 | |||||||||||
9023 | if (inUnion() && shouldDeleteForVariantObjCPtrMember(FD, FieldType)) | ||||||||||
9024 | return true; | ||||||||||
9025 | |||||||||||
9026 | if (CSM == Sema::CXXDefaultConstructor) { | ||||||||||
9027 | // For a default constructor, all references must be initialized in-class | ||||||||||
9028 | // and, if a union, it must have a non-const member. | ||||||||||
9029 | if (FieldType->isReferenceType() && !FD->hasInClassInitializer()) { | ||||||||||
9030 | if (Diagnose) | ||||||||||
9031 | S.Diag(FD->getLocation(), diag::note_deleted_default_ctor_uninit_field) | ||||||||||
9032 | << !!ICI << MD->getParent() << FD << FieldType << /*Reference*/0; | ||||||||||
9033 | return true; | ||||||||||
9034 | } | ||||||||||
9035 | // C++11 [class.ctor]p5: any non-variant non-static data member of | ||||||||||
9036 | // const-qualified type (or array thereof) with no | ||||||||||
9037 | // brace-or-equal-initializer does not have a user-provided default | ||||||||||
9038 | // constructor. | ||||||||||
9039 | if (!inUnion() && FieldType.isConstQualified() && | ||||||||||
9040 | !FD->hasInClassInitializer() && | ||||||||||
9041 | (!FieldRecord || !FieldRecord->hasUserProvidedDefaultConstructor())) { | ||||||||||
9042 | if (Diagnose) | ||||||||||
9043 | S.Diag(FD->getLocation(), diag::note_deleted_default_ctor_uninit_field) | ||||||||||
9044 | << !!ICI << MD->getParent() << FD << FD->getType() << /*Const*/1; | ||||||||||
9045 | return true; | ||||||||||
9046 | } | ||||||||||
9047 | |||||||||||
9048 | if (inUnion() && !FieldType.isConstQualified()) | ||||||||||
9049 | AllFieldsAreConst = false; | ||||||||||
9050 | } else if (CSM == Sema::CXXCopyConstructor) { | ||||||||||
9051 | // For a copy constructor, data members must not be of rvalue reference | ||||||||||
9052 | // type. | ||||||||||
9053 | if (FieldType->isRValueReferenceType()) { | ||||||||||
9054 | if (Diagnose) | ||||||||||
9055 | S.Diag(FD->getLocation(), diag::note_deleted_copy_ctor_rvalue_reference) | ||||||||||
9056 | << MD->getParent() << FD << FieldType; | ||||||||||
9057 | return true; | ||||||||||
9058 | } | ||||||||||
9059 | } else if (IsAssignment) { | ||||||||||
9060 | // For an assignment operator, data members must not be of reference type. | ||||||||||
9061 | if (FieldType->isReferenceType()) { | ||||||||||
9062 | if (Diagnose) | ||||||||||
9063 | S.Diag(FD->getLocation(), diag::note_deleted_assign_field) | ||||||||||
9064 | << isMove() << MD->getParent() << FD << FieldType << /*Reference*/0; | ||||||||||
9065 | return true; | ||||||||||
9066 | } | ||||||||||
9067 | if (!FieldRecord && FieldType.isConstQualified()) { | ||||||||||
9068 | // C++11 [class.copy]p23: | ||||||||||
9069 | // -- a non-static data member of const non-class type (or array thereof) | ||||||||||
9070 | if (Diagnose) | ||||||||||
9071 | S.Diag(FD->getLocation(), diag::note_deleted_assign_field) | ||||||||||
9072 | << isMove() << MD->getParent() << FD << FD->getType() << /*Const*/1; | ||||||||||
9073 | return true; | ||||||||||
9074 | } | ||||||||||
9075 | } | ||||||||||
9076 | |||||||||||
9077 | if (FieldRecord) { | ||||||||||
9078 | // Some additional restrictions exist on the variant members. | ||||||||||
9079 | if (!inUnion() && FieldRecord->isUnion() && | ||||||||||
9080 | FieldRecord->isAnonymousStructOrUnion()) { | ||||||||||
9081 | bool AllVariantFieldsAreConst = true; | ||||||||||
9082 | |||||||||||
9083 | // FIXME: Handle anonymous unions declared within anonymous unions. | ||||||||||
9084 | for (auto *UI : FieldRecord->fields()) { | ||||||||||
9085 | QualType UnionFieldType = S.Context.getBaseElementType(UI->getType()); | ||||||||||
9086 | |||||||||||
9087 | if (shouldDeleteForVariantObjCPtrMember(&*UI, UnionFieldType)) | ||||||||||
9088 | return true; | ||||||||||
9089 | |||||||||||
9090 | if (!UnionFieldType.isConstQualified()) | ||||||||||
9091 | AllVariantFieldsAreConst = false; | ||||||||||
9092 | |||||||||||
9093 | CXXRecordDecl *UnionFieldRecord = UnionFieldType->getAsCXXRecordDecl(); | ||||||||||
9094 | if (UnionFieldRecord && | ||||||||||
9095 | shouldDeleteForClassSubobject(UnionFieldRecord, UI, | ||||||||||
9096 | UnionFieldType.getCVRQualifiers())) | ||||||||||
9097 | return true; | ||||||||||
9098 | } | ||||||||||
9099 | |||||||||||
9100 | // At least one member in each anonymous union must be non-const | ||||||||||
9101 | if (CSM == Sema::CXXDefaultConstructor && AllVariantFieldsAreConst && | ||||||||||
9102 | !FieldRecord->field_empty()) { | ||||||||||
9103 | if (Diagnose) | ||||||||||
9104 | S.Diag(FieldRecord->getLocation(), | ||||||||||
9105 | diag::note_deleted_default_ctor_all_const) | ||||||||||
9106 | << !!ICI << MD->getParent() << /*anonymous union*/1; | ||||||||||
9107 | return true; | ||||||||||
9108 | } | ||||||||||
9109 | |||||||||||
9110 | // Don't check the implicit member of the anonymous union type. | ||||||||||
9111 | // This is technically non-conformant, but sanity demands it. | ||||||||||
9112 | return false; | ||||||||||
9113 | } | ||||||||||
9114 | |||||||||||
9115 | if (shouldDeleteForClassSubobject(FieldRecord, FD, | ||||||||||
9116 | FieldType.getCVRQualifiers())) | ||||||||||
9117 | return true; | ||||||||||
9118 | } | ||||||||||
9119 | |||||||||||
9120 | return false; | ||||||||||
9121 | } | ||||||||||
9122 | |||||||||||
9123 | /// C++11 [class.ctor] p5: | ||||||||||
9124 | /// A defaulted default constructor for a class X is defined as deleted if | ||||||||||
9125 | /// X is a union and all of its variant members are of const-qualified type. | ||||||||||
9126 | bool SpecialMemberDeletionInfo::shouldDeleteForAllConstMembers() { | ||||||||||
9127 | // This is a silly definition, because it gives an empty union a deleted | ||||||||||
9128 | // default constructor. Don't do that. | ||||||||||
9129 | if (CSM == Sema::CXXDefaultConstructor && inUnion() && AllFieldsAreConst) { | ||||||||||
9130 | bool AnyFields = false; | ||||||||||
9131 | for (auto *F : MD->getParent()->fields()) | ||||||||||
9132 | if ((AnyFields = !F->isUnnamedBitfield())) | ||||||||||
9133 | break; | ||||||||||
9134 | if (!AnyFields) | ||||||||||
9135 | return false; | ||||||||||
9136 | if (Diagnose) | ||||||||||
9137 | S.Diag(MD->getParent()->getLocation(), | ||||||||||
9138 | diag::note_deleted_default_ctor_all_const) | ||||||||||
9139 | << !!ICI << MD->getParent() << /*not anonymous union*/0; | ||||||||||
9140 | return true; | ||||||||||
9141 | } | ||||||||||
9142 | return false; | ||||||||||
9143 | } | ||||||||||
9144 | |||||||||||
9145 | /// Determine whether a defaulted special member function should be defined as | ||||||||||
9146 | /// deleted, as specified in C++11 [class.ctor]p5, C++11 [class.copy]p11, | ||||||||||
9147 | /// C++11 [class.copy]p23, and C++11 [class.dtor]p5. | ||||||||||
9148 | bool Sema::ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM, | ||||||||||
9149 | InheritedConstructorInfo *ICI, | ||||||||||
9150 | bool Diagnose) { | ||||||||||
9151 | if (MD->isInvalidDecl()) | ||||||||||
9152 | return false; | ||||||||||
9153 | CXXRecordDecl *RD = MD->getParent(); | ||||||||||
9154 | assert(!RD->isDependentType() && "do deletion after instantiation")(static_cast <bool> (!RD->isDependentType() && "do deletion after instantiation") ? void (0) : __assert_fail ("!RD->isDependentType() && \"do deletion after instantiation\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9154, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9155 | if (!LangOpts.CPlusPlus11 || RD->isInvalidDecl()) | ||||||||||
9156 | return false; | ||||||||||
9157 | |||||||||||
9158 | // C++11 [expr.lambda.prim]p19: | ||||||||||
9159 | // The closure type associated with a lambda-expression has a | ||||||||||
9160 | // deleted (8.4.3) default constructor and a deleted copy | ||||||||||
9161 | // assignment operator. | ||||||||||
9162 | // C++2a adds back these operators if the lambda has no lambda-capture. | ||||||||||
9163 | if (RD->isLambda() && !RD->lambdaIsDefaultConstructibleAndAssignable() && | ||||||||||
9164 | (CSM == CXXDefaultConstructor || CSM == CXXCopyAssignment)) { | ||||||||||
9165 | if (Diagnose) | ||||||||||
9166 | Diag(RD->getLocation(), diag::note_lambda_decl); | ||||||||||
9167 | return true; | ||||||||||
9168 | } | ||||||||||
9169 | |||||||||||
9170 | // For an anonymous struct or union, the copy and assignment special members | ||||||||||
9171 | // will never be used, so skip the check. For an anonymous union declared at | ||||||||||
9172 | // namespace scope, the constructor and destructor are used. | ||||||||||
9173 | if (CSM != CXXDefaultConstructor && CSM != CXXDestructor && | ||||||||||
9174 | RD->isAnonymousStructOrUnion()) | ||||||||||
9175 | return false; | ||||||||||
9176 | |||||||||||
9177 | // C++11 [class.copy]p7, p18: | ||||||||||
9178 | // If the class definition declares a move constructor or move assignment | ||||||||||
9179 | // operator, an implicitly declared copy constructor or copy assignment | ||||||||||
9180 | // operator is defined as deleted. | ||||||||||
9181 | if (MD->isImplicit() && | ||||||||||
9182 | (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment)) { | ||||||||||
9183 | CXXMethodDecl *UserDeclaredMove = nullptr; | ||||||||||
9184 | |||||||||||
9185 | // In Microsoft mode up to MSVC 2013, a user-declared move only causes the | ||||||||||
9186 | // deletion of the corresponding copy operation, not both copy operations. | ||||||||||
9187 | // MSVC 2015 has adopted the standards conforming behavior. | ||||||||||
9188 | bool DeletesOnlyMatchingCopy = | ||||||||||
9189 | getLangOpts().MSVCCompat && | ||||||||||
9190 | !getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015); | ||||||||||
9191 | |||||||||||
9192 | if (RD->hasUserDeclaredMoveConstructor() && | ||||||||||
9193 | (!DeletesOnlyMatchingCopy || CSM == CXXCopyConstructor)) { | ||||||||||
9194 | if (!Diagnose) return true; | ||||||||||
9195 | |||||||||||
9196 | // Find any user-declared move constructor. | ||||||||||
9197 | for (auto *I : RD->ctors()) { | ||||||||||
9198 | if (I->isMoveConstructor()) { | ||||||||||
9199 | UserDeclaredMove = I; | ||||||||||
9200 | break; | ||||||||||
9201 | } | ||||||||||
9202 | } | ||||||||||
9203 | assert(UserDeclaredMove)(static_cast <bool> (UserDeclaredMove) ? void (0) : __assert_fail ("UserDeclaredMove", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9203, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9204 | } else if (RD->hasUserDeclaredMoveAssignment() && | ||||||||||
9205 | (!DeletesOnlyMatchingCopy || CSM == CXXCopyAssignment)) { | ||||||||||
9206 | if (!Diagnose) return true; | ||||||||||
9207 | |||||||||||
9208 | // Find any user-declared move assignment operator. | ||||||||||
9209 | for (auto *I : RD->methods()) { | ||||||||||
9210 | if (I->isMoveAssignmentOperator()) { | ||||||||||
9211 | UserDeclaredMove = I; | ||||||||||
9212 | break; | ||||||||||
9213 | } | ||||||||||
9214 | } | ||||||||||
9215 | assert(UserDeclaredMove)(static_cast <bool> (UserDeclaredMove) ? void (0) : __assert_fail ("UserDeclaredMove", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9215, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9216 | } | ||||||||||
9217 | |||||||||||
9218 | if (UserDeclaredMove) { | ||||||||||
9219 | Diag(UserDeclaredMove->getLocation(), | ||||||||||
9220 | diag::note_deleted_copy_user_declared_move) | ||||||||||
9221 | << (CSM == CXXCopyAssignment) << RD | ||||||||||
9222 | << UserDeclaredMove->isMoveAssignmentOperator(); | ||||||||||
9223 | return true; | ||||||||||
9224 | } | ||||||||||
9225 | } | ||||||||||
9226 | |||||||||||
9227 | // Do access control from the special member function | ||||||||||
9228 | ContextRAII MethodContext(*this, MD); | ||||||||||
9229 | |||||||||||
9230 | // C++11 [class.dtor]p5: | ||||||||||
9231 | // -- for a virtual destructor, lookup of the non-array deallocation function | ||||||||||
9232 | // results in an ambiguity or in a function that is deleted or inaccessible | ||||||||||
9233 | if (CSM == CXXDestructor && MD->isVirtual()) { | ||||||||||
9234 | FunctionDecl *OperatorDelete = nullptr; | ||||||||||
9235 | DeclarationName Name = | ||||||||||
9236 | Context.DeclarationNames.getCXXOperatorName(OO_Delete); | ||||||||||
9237 | if (FindDeallocationFunction(MD->getLocation(), MD->getParent(), Name, | ||||||||||
9238 | OperatorDelete, /*Diagnose*/false)) { | ||||||||||
9239 | if (Diagnose) | ||||||||||
9240 | Diag(RD->getLocation(), diag::note_deleted_dtor_no_operator_delete); | ||||||||||
9241 | return true; | ||||||||||
9242 | } | ||||||||||
9243 | } | ||||||||||
9244 | |||||||||||
9245 | SpecialMemberDeletionInfo SMI(*this, MD, CSM, ICI, Diagnose); | ||||||||||
9246 | |||||||||||
9247 | // Per DR1611, do not consider virtual bases of constructors of abstract | ||||||||||
9248 | // classes, since we are not going to construct them. | ||||||||||
9249 | // Per DR1658, do not consider virtual bases of destructors of abstract | ||||||||||
9250 | // classes either. | ||||||||||
9251 | // Per DR2180, for assignment operators we only assign (and thus only | ||||||||||
9252 | // consider) direct bases. | ||||||||||
9253 | if (SMI.visit(SMI.IsAssignment ? SMI.VisitDirectBases | ||||||||||
9254 | : SMI.VisitPotentiallyConstructedBases)) | ||||||||||
9255 | return true; | ||||||||||
9256 | |||||||||||
9257 | if (SMI.shouldDeleteForAllConstMembers()) | ||||||||||
9258 | return true; | ||||||||||
9259 | |||||||||||
9260 | if (getLangOpts().CUDA) { | ||||||||||
9261 | // We should delete the special member in CUDA mode if target inference | ||||||||||
9262 | // failed. | ||||||||||
9263 | // For inherited constructors (non-null ICI), CSM may be passed so that MD | ||||||||||
9264 | // is treated as certain special member, which may not reflect what special | ||||||||||
9265 | // member MD really is. However inferCUDATargetForImplicitSpecialMember | ||||||||||
9266 | // expects CSM to match MD, therefore recalculate CSM. | ||||||||||
9267 | assert(ICI || CSM == getSpecialMember(MD))(static_cast <bool> (ICI || CSM == getSpecialMember(MD) ) ? void (0) : __assert_fail ("ICI || CSM == getSpecialMember(MD)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9267, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9268 | auto RealCSM = CSM; | ||||||||||
9269 | if (ICI) | ||||||||||
9270 | RealCSM = getSpecialMember(MD); | ||||||||||
9271 | |||||||||||
9272 | return inferCUDATargetForImplicitSpecialMember(RD, RealCSM, MD, | ||||||||||
9273 | SMI.ConstArg, Diagnose); | ||||||||||
9274 | } | ||||||||||
9275 | |||||||||||
9276 | return false; | ||||||||||
9277 | } | ||||||||||
9278 | |||||||||||
9279 | void Sema::DiagnoseDeletedDefaultedFunction(FunctionDecl *FD) { | ||||||||||
9280 | DefaultedFunctionKind DFK = getDefaultedFunctionKind(FD); | ||||||||||
9281 | assert(DFK && "not a defaultable function")(static_cast <bool> (DFK && "not a defaultable function" ) ? void (0) : __assert_fail ("DFK && \"not a defaultable function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9281, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9282 | assert(FD->isDefaulted() && FD->isDeleted() && "not defaulted and deleted")(static_cast <bool> (FD->isDefaulted() && FD ->isDeleted() && "not defaulted and deleted") ? void (0) : __assert_fail ("FD->isDefaulted() && FD->isDeleted() && \"not defaulted and deleted\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9282, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9283 | |||||||||||
9284 | if (DFK.isSpecialMember()) { | ||||||||||
9285 | ShouldDeleteSpecialMember(cast<CXXMethodDecl>(FD), DFK.asSpecialMember(), | ||||||||||
9286 | nullptr, /*Diagnose=*/true); | ||||||||||
9287 | } else { | ||||||||||
9288 | DefaultedComparisonAnalyzer( | ||||||||||
9289 | *this, cast<CXXRecordDecl>(FD->getLexicalDeclContext()), FD, | ||||||||||
9290 | DFK.asComparison(), DefaultedComparisonAnalyzer::ExplainDeleted) | ||||||||||
9291 | .visit(); | ||||||||||
9292 | } | ||||||||||
9293 | } | ||||||||||
9294 | |||||||||||
9295 | /// Perform lookup for a special member of the specified kind, and determine | ||||||||||
9296 | /// whether it is trivial. If the triviality can be determined without the | ||||||||||
9297 | /// lookup, skip it. This is intended for use when determining whether a | ||||||||||
9298 | /// special member of a containing object is trivial, and thus does not ever | ||||||||||
9299 | /// perform overload resolution for default constructors. | ||||||||||
9300 | /// | ||||||||||
9301 | /// If \p Selected is not \c NULL, \c *Selected will be filled in with the | ||||||||||
9302 | /// member that was most likely to be intended to be trivial, if any. | ||||||||||
9303 | /// | ||||||||||
9304 | /// If \p ForCall is true, look at CXXRecord::HasTrivialSpecialMembersForCall to | ||||||||||
9305 | /// determine whether the special member is trivial. | ||||||||||
9306 | static bool findTrivialSpecialMember(Sema &S, CXXRecordDecl *RD, | ||||||||||
9307 | Sema::CXXSpecialMember CSM, unsigned Quals, | ||||||||||
9308 | bool ConstRHS, | ||||||||||
9309 | Sema::TrivialABIHandling TAH, | ||||||||||
9310 | CXXMethodDecl **Selected) { | ||||||||||
9311 | if (Selected) | ||||||||||
9312 | *Selected = nullptr; | ||||||||||
9313 | |||||||||||
9314 | switch (CSM) { | ||||||||||
9315 | case Sema::CXXInvalid: | ||||||||||
9316 | llvm_unreachable("not a special member")::llvm::llvm_unreachable_internal("not a special member", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9316); | ||||||||||
9317 | |||||||||||
9318 | case Sema::CXXDefaultConstructor: | ||||||||||
9319 | // C++11 [class.ctor]p5: | ||||||||||
9320 | // A default constructor is trivial if: | ||||||||||
9321 | // - all the [direct subobjects] have trivial default constructors | ||||||||||
9322 | // | ||||||||||
9323 | // Note, no overload resolution is performed in this case. | ||||||||||
9324 | if (RD->hasTrivialDefaultConstructor()) | ||||||||||
9325 | return true; | ||||||||||
9326 | |||||||||||
9327 | if (Selected) { | ||||||||||
9328 | // If there's a default constructor which could have been trivial, dig it | ||||||||||
9329 | // out. Otherwise, if there's any user-provided default constructor, point | ||||||||||
9330 | // to that as an example of why there's not a trivial one. | ||||||||||
9331 | CXXConstructorDecl *DefCtor = nullptr; | ||||||||||
9332 | if (RD->needsImplicitDefaultConstructor()) | ||||||||||
9333 | S.DeclareImplicitDefaultConstructor(RD); | ||||||||||
9334 | for (auto *CI : RD->ctors()) { | ||||||||||
9335 | if (!CI->isDefaultConstructor()) | ||||||||||
9336 | continue; | ||||||||||
9337 | DefCtor = CI; | ||||||||||
9338 | if (!DefCtor->isUserProvided()) | ||||||||||
9339 | break; | ||||||||||
9340 | } | ||||||||||
9341 | |||||||||||
9342 | *Selected = DefCtor; | ||||||||||
9343 | } | ||||||||||
9344 | |||||||||||
9345 | return false; | ||||||||||
9346 | |||||||||||
9347 | case Sema::CXXDestructor: | ||||||||||
9348 | // C++11 [class.dtor]p5: | ||||||||||
9349 | // A destructor is trivial if: | ||||||||||
9350 | // - all the direct [subobjects] have trivial destructors | ||||||||||
9351 | if (RD->hasTrivialDestructor() || | ||||||||||
9352 | (TAH == Sema::TAH_ConsiderTrivialABI && | ||||||||||
9353 | RD->hasTrivialDestructorForCall())) | ||||||||||
9354 | return true; | ||||||||||
9355 | |||||||||||
9356 | if (Selected) { | ||||||||||
9357 | if (RD->needsImplicitDestructor()) | ||||||||||
9358 | S.DeclareImplicitDestructor(RD); | ||||||||||
9359 | *Selected = RD->getDestructor(); | ||||||||||
9360 | } | ||||||||||
9361 | |||||||||||
9362 | return false; | ||||||||||
9363 | |||||||||||
9364 | case Sema::CXXCopyConstructor: | ||||||||||
9365 | // C++11 [class.copy]p12: | ||||||||||
9366 | // A copy constructor is trivial if: | ||||||||||
9367 | // - the constructor selected to copy each direct [subobject] is trivial | ||||||||||
9368 | if (RD->hasTrivialCopyConstructor() || | ||||||||||
9369 | (TAH == Sema::TAH_ConsiderTrivialABI && | ||||||||||
9370 | RD->hasTrivialCopyConstructorForCall())) { | ||||||||||
9371 | if (Quals == Qualifiers::Const) | ||||||||||
9372 | // We must either select the trivial copy constructor or reach an | ||||||||||
9373 | // ambiguity; no need to actually perform overload resolution. | ||||||||||
9374 | return true; | ||||||||||
9375 | } else if (!Selected) { | ||||||||||
9376 | return false; | ||||||||||
9377 | } | ||||||||||
9378 | // In C++98, we are not supposed to perform overload resolution here, but we | ||||||||||
9379 | // treat that as a language defect, as suggested on cxx-abi-dev, to treat | ||||||||||
9380 | // cases like B as having a non-trivial copy constructor: | ||||||||||
9381 | // struct A { template<typename T> A(T&); }; | ||||||||||
9382 | // struct B { mutable A a; }; | ||||||||||
9383 | goto NeedOverloadResolution; | ||||||||||
9384 | |||||||||||
9385 | case Sema::CXXCopyAssignment: | ||||||||||
9386 | // C++11 [class.copy]p25: | ||||||||||
9387 | // A copy assignment operator is trivial if: | ||||||||||
9388 | // - the assignment operator selected to copy each direct [subobject] is | ||||||||||
9389 | // trivial | ||||||||||
9390 | if (RD->hasTrivialCopyAssignment()) { | ||||||||||
9391 | if (Quals == Qualifiers::Const) | ||||||||||
9392 | return true; | ||||||||||
9393 | } else if (!Selected) { | ||||||||||
9394 | return false; | ||||||||||
9395 | } | ||||||||||
9396 | // In C++98, we are not supposed to perform overload resolution here, but we | ||||||||||
9397 | // treat that as a language defect. | ||||||||||
9398 | goto NeedOverloadResolution; | ||||||||||
9399 | |||||||||||
9400 | case Sema::CXXMoveConstructor: | ||||||||||
9401 | case Sema::CXXMoveAssignment: | ||||||||||
9402 | NeedOverloadResolution: | ||||||||||
9403 | Sema::SpecialMemberOverloadResult SMOR = | ||||||||||
9404 | lookupCallFromSpecialMember(S, RD, CSM, Quals, ConstRHS); | ||||||||||
9405 | |||||||||||
9406 | // The standard doesn't describe how to behave if the lookup is ambiguous. | ||||||||||
9407 | // We treat it as not making the member non-trivial, just like the standard | ||||||||||
9408 | // mandates for the default constructor. This should rarely matter, because | ||||||||||
9409 | // the member will also be deleted. | ||||||||||
9410 | if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous) | ||||||||||
9411 | return true; | ||||||||||
9412 | |||||||||||
9413 | if (!SMOR.getMethod()) { | ||||||||||
9414 | assert(SMOR.getKind() ==(static_cast <bool> (SMOR.getKind() == Sema::SpecialMemberOverloadResult ::NoMemberOrDeleted) ? void (0) : __assert_fail ("SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9415, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
9415 | Sema::SpecialMemberOverloadResult::NoMemberOrDeleted)(static_cast <bool> (SMOR.getKind() == Sema::SpecialMemberOverloadResult ::NoMemberOrDeleted) ? void (0) : __assert_fail ("SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9415, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9416 | return false; | ||||||||||
9417 | } | ||||||||||
9418 | |||||||||||
9419 | // We deliberately don't check if we found a deleted special member. We're | ||||||||||
9420 | // not supposed to! | ||||||||||
9421 | if (Selected) | ||||||||||
9422 | *Selected = SMOR.getMethod(); | ||||||||||
9423 | |||||||||||
9424 | if (TAH == Sema::TAH_ConsiderTrivialABI && | ||||||||||
9425 | (CSM == Sema::CXXCopyConstructor || CSM == Sema::CXXMoveConstructor)) | ||||||||||
9426 | return SMOR.getMethod()->isTrivialForCall(); | ||||||||||
9427 | return SMOR.getMethod()->isTrivial(); | ||||||||||
9428 | } | ||||||||||
9429 | |||||||||||
9430 | llvm_unreachable("unknown special method kind")::llvm::llvm_unreachable_internal("unknown special method kind" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9430); | ||||||||||
9431 | } | ||||||||||
9432 | |||||||||||
9433 | static CXXConstructorDecl *findUserDeclaredCtor(CXXRecordDecl *RD) { | ||||||||||
9434 | for (auto *CI : RD->ctors()) | ||||||||||
9435 | if (!CI->isImplicit()) | ||||||||||
9436 | return CI; | ||||||||||
9437 | |||||||||||
9438 | // Look for constructor templates. | ||||||||||
9439 | typedef CXXRecordDecl::specific_decl_iterator<FunctionTemplateDecl> tmpl_iter; | ||||||||||
9440 | for (tmpl_iter TI(RD->decls_begin()), TE(RD->decls_end()); TI != TE; ++TI) { | ||||||||||
9441 | if (CXXConstructorDecl *CD = | ||||||||||
9442 | dyn_cast<CXXConstructorDecl>(TI->getTemplatedDecl())) | ||||||||||
9443 | return CD; | ||||||||||
9444 | } | ||||||||||
9445 | |||||||||||
9446 | return nullptr; | ||||||||||
9447 | } | ||||||||||
9448 | |||||||||||
9449 | /// The kind of subobject we are checking for triviality. The values of this | ||||||||||
9450 | /// enumeration are used in diagnostics. | ||||||||||
9451 | enum TrivialSubobjectKind { | ||||||||||
9452 | /// The subobject is a base class. | ||||||||||
9453 | TSK_BaseClass, | ||||||||||
9454 | /// The subobject is a non-static data member. | ||||||||||
9455 | TSK_Field, | ||||||||||
9456 | /// The object is actually the complete object. | ||||||||||
9457 | TSK_CompleteObject | ||||||||||
9458 | }; | ||||||||||
9459 | |||||||||||
9460 | /// Check whether the special member selected for a given type would be trivial. | ||||||||||
9461 | static bool checkTrivialSubobjectCall(Sema &S, SourceLocation SubobjLoc, | ||||||||||
9462 | QualType SubType, bool ConstRHS, | ||||||||||
9463 | Sema::CXXSpecialMember CSM, | ||||||||||
9464 | TrivialSubobjectKind Kind, | ||||||||||
9465 | Sema::TrivialABIHandling TAH, bool Diagnose) { | ||||||||||
9466 | CXXRecordDecl *SubRD = SubType->getAsCXXRecordDecl(); | ||||||||||
9467 | if (!SubRD) | ||||||||||
9468 | return true; | ||||||||||
9469 | |||||||||||
9470 | CXXMethodDecl *Selected; | ||||||||||
9471 | if (findTrivialSpecialMember(S, SubRD, CSM, SubType.getCVRQualifiers(), | ||||||||||
9472 | ConstRHS, TAH, Diagnose ? &Selected : nullptr)) | ||||||||||
9473 | return true; | ||||||||||
9474 | |||||||||||
9475 | if (Diagnose) { | ||||||||||
9476 | if (ConstRHS) | ||||||||||
9477 | SubType.addConst(); | ||||||||||
9478 | |||||||||||
9479 | if (!Selected && CSM == Sema::CXXDefaultConstructor) { | ||||||||||
9480 | S.Diag(SubobjLoc, diag::note_nontrivial_no_def_ctor) | ||||||||||
9481 | << Kind << SubType.getUnqualifiedType(); | ||||||||||
9482 | if (CXXConstructorDecl *CD = findUserDeclaredCtor(SubRD)) | ||||||||||
9483 | S.Diag(CD->getLocation(), diag::note_user_declared_ctor); | ||||||||||
9484 | } else if (!Selected) | ||||||||||
9485 | S.Diag(SubobjLoc, diag::note_nontrivial_no_copy) | ||||||||||
9486 | << Kind << SubType.getUnqualifiedType() << CSM << SubType; | ||||||||||
9487 | else if (Selected->isUserProvided()) { | ||||||||||
9488 | if (Kind == TSK_CompleteObject) | ||||||||||
9489 | S.Diag(Selected->getLocation(), diag::note_nontrivial_user_provided) | ||||||||||
9490 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||||||||
9491 | else { | ||||||||||
9492 | S.Diag(SubobjLoc, diag::note_nontrivial_user_provided) | ||||||||||
9493 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||||||||
9494 | S.Diag(Selected->getLocation(), diag::note_declared_at); | ||||||||||
9495 | } | ||||||||||
9496 | } else { | ||||||||||
9497 | if (Kind != TSK_CompleteObject) | ||||||||||
9498 | S.Diag(SubobjLoc, diag::note_nontrivial_subobject) | ||||||||||
9499 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||||||||
9500 | |||||||||||
9501 | // Explain why the defaulted or deleted special member isn't trivial. | ||||||||||
9502 | S.SpecialMemberIsTrivial(Selected, CSM, Sema::TAH_IgnoreTrivialABI, | ||||||||||
9503 | Diagnose); | ||||||||||
9504 | } | ||||||||||
9505 | } | ||||||||||
9506 | |||||||||||
9507 | return false; | ||||||||||
9508 | } | ||||||||||
9509 | |||||||||||
9510 | /// Check whether the members of a class type allow a special member to be | ||||||||||
9511 | /// trivial. | ||||||||||
9512 | static bool checkTrivialClassMembers(Sema &S, CXXRecordDecl *RD, | ||||||||||
9513 | Sema::CXXSpecialMember CSM, | ||||||||||
9514 | bool ConstArg, | ||||||||||
9515 | Sema::TrivialABIHandling TAH, | ||||||||||
9516 | bool Diagnose) { | ||||||||||
9517 | for (const auto *FI : RD->fields()) { | ||||||||||
9518 | if (FI->isInvalidDecl() || FI->isUnnamedBitfield()) | ||||||||||
9519 | continue; | ||||||||||
9520 | |||||||||||
9521 | QualType FieldType = S.Context.getBaseElementType(FI->getType()); | ||||||||||
9522 | |||||||||||
9523 | // Pretend anonymous struct or union members are members of this class. | ||||||||||
9524 | if (FI->isAnonymousStructOrUnion()) { | ||||||||||
9525 | if (!checkTrivialClassMembers(S, FieldType->getAsCXXRecordDecl(), | ||||||||||
9526 | CSM, ConstArg, TAH, Diagnose)) | ||||||||||
9527 | return false; | ||||||||||
9528 | continue; | ||||||||||
9529 | } | ||||||||||
9530 | |||||||||||
9531 | // C++11 [class.ctor]p5: | ||||||||||
9532 | // A default constructor is trivial if [...] | ||||||||||
9533 | // -- no non-static data member of its class has a | ||||||||||
9534 | // brace-or-equal-initializer | ||||||||||
9535 | if (CSM == Sema::CXXDefaultConstructor && FI->hasInClassInitializer()) { | ||||||||||
9536 | if (Diagnose) | ||||||||||
9537 | S.Diag(FI->getLocation(), diag::note_nontrivial_default_member_init) | ||||||||||
9538 | << FI; | ||||||||||
9539 | return false; | ||||||||||
9540 | } | ||||||||||
9541 | |||||||||||
9542 | // Objective C ARC 4.3.5: | ||||||||||
9543 | // [...] nontrivally ownership-qualified types are [...] not trivially | ||||||||||
9544 | // default constructible, copy constructible, move constructible, copy | ||||||||||
9545 | // assignable, move assignable, or destructible [...] | ||||||||||
9546 | if (FieldType.hasNonTrivialObjCLifetime()) { | ||||||||||
9547 | if (Diagnose) | ||||||||||
9548 | S.Diag(FI->getLocation(), diag::note_nontrivial_objc_ownership) | ||||||||||
9549 | << RD << FieldType.getObjCLifetime(); | ||||||||||
9550 | return false; | ||||||||||
9551 | } | ||||||||||
9552 | |||||||||||
9553 | bool ConstRHS = ConstArg && !FI->isMutable(); | ||||||||||
9554 | if (!checkTrivialSubobjectCall(S, FI->getLocation(), FieldType, ConstRHS, | ||||||||||
9555 | CSM, TSK_Field, TAH, Diagnose)) | ||||||||||
9556 | return false; | ||||||||||
9557 | } | ||||||||||
9558 | |||||||||||
9559 | return true; | ||||||||||
9560 | } | ||||||||||
9561 | |||||||||||
9562 | /// Diagnose why the specified class does not have a trivial special member of | ||||||||||
9563 | /// the given kind. | ||||||||||
9564 | void Sema::DiagnoseNontrivial(const CXXRecordDecl *RD, CXXSpecialMember CSM) { | ||||||||||
9565 | QualType Ty = Context.getRecordType(RD); | ||||||||||
9566 | |||||||||||
9567 | bool ConstArg = (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment); | ||||||||||
9568 | checkTrivialSubobjectCall(*this, RD->getLocation(), Ty, ConstArg, CSM, | ||||||||||
9569 | TSK_CompleteObject, TAH_IgnoreTrivialABI, | ||||||||||
9570 | /*Diagnose*/true); | ||||||||||
9571 | } | ||||||||||
9572 | |||||||||||
9573 | /// Determine whether a defaulted or deleted special member function is trivial, | ||||||||||
9574 | /// as specified in C++11 [class.ctor]p5, C++11 [class.copy]p12, | ||||||||||
9575 | /// C++11 [class.copy]p25, and C++11 [class.dtor]p5. | ||||||||||
9576 | bool Sema::SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM, | ||||||||||
9577 | TrivialABIHandling TAH, bool Diagnose) { | ||||||||||
9578 | assert(!MD->isUserProvided() && CSM != CXXInvalid && "not special enough")(static_cast <bool> (!MD->isUserProvided() && CSM != CXXInvalid && "not special enough") ? void (0 ) : __assert_fail ("!MD->isUserProvided() && CSM != CXXInvalid && \"not special enough\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9578, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9579 | |||||||||||
9580 | CXXRecordDecl *RD = MD->getParent(); | ||||||||||
9581 | |||||||||||
9582 | bool ConstArg = false; | ||||||||||
9583 | |||||||||||
9584 | // C++11 [class.copy]p12, p25: [DR1593] | ||||||||||
9585 | // A [special member] is trivial if [...] its parameter-type-list is | ||||||||||
9586 | // equivalent to the parameter-type-list of an implicit declaration [...] | ||||||||||
9587 | switch (CSM) { | ||||||||||
9588 | case CXXDefaultConstructor: | ||||||||||
9589 | case CXXDestructor: | ||||||||||
9590 | // Trivial default constructors and destructors cannot have parameters. | ||||||||||
9591 | break; | ||||||||||
9592 | |||||||||||
9593 | case CXXCopyConstructor: | ||||||||||
9594 | case CXXCopyAssignment: { | ||||||||||
9595 | // Trivial copy operations always have const, non-volatile parameter types. | ||||||||||
9596 | ConstArg = true; | ||||||||||
9597 | const ParmVarDecl *Param0 = MD->getParamDecl(0); | ||||||||||
9598 | const ReferenceType *RT = Param0->getType()->getAs<ReferenceType>(); | ||||||||||
9599 | if (!RT || RT->getPointeeType().getCVRQualifiers() != Qualifiers::Const) { | ||||||||||
9600 | if (Diagnose) | ||||||||||
9601 | Diag(Param0->getLocation(), diag::note_nontrivial_param_type) | ||||||||||
9602 | << Param0->getSourceRange() << Param0->getType() | ||||||||||
9603 | << Context.getLValueReferenceType( | ||||||||||
9604 | Context.getRecordType(RD).withConst()); | ||||||||||
9605 | return false; | ||||||||||
9606 | } | ||||||||||
9607 | break; | ||||||||||
9608 | } | ||||||||||
9609 | |||||||||||
9610 | case CXXMoveConstructor: | ||||||||||
9611 | case CXXMoveAssignment: { | ||||||||||
9612 | // Trivial move operations always have non-cv-qualified parameters. | ||||||||||
9613 | const ParmVarDecl *Param0 = MD->getParamDecl(0); | ||||||||||
9614 | const RValueReferenceType *RT = | ||||||||||
9615 | Param0->getType()->getAs<RValueReferenceType>(); | ||||||||||
9616 | if (!RT || RT->getPointeeType().getCVRQualifiers()) { | ||||||||||
9617 | if (Diagnose) | ||||||||||
9618 | Diag(Param0->getLocation(), diag::note_nontrivial_param_type) | ||||||||||
9619 | << Param0->getSourceRange() << Param0->getType() | ||||||||||
9620 | << Context.getRValueReferenceType(Context.getRecordType(RD)); | ||||||||||
9621 | return false; | ||||||||||
9622 | } | ||||||||||
9623 | break; | ||||||||||
9624 | } | ||||||||||
9625 | |||||||||||
9626 | case CXXInvalid: | ||||||||||
9627 | llvm_unreachable("not a special member")::llvm::llvm_unreachable_internal("not a special member", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9627); | ||||||||||
9628 | } | ||||||||||
9629 | |||||||||||
9630 | if (MD->getMinRequiredArguments() < MD->getNumParams()) { | ||||||||||
9631 | if (Diagnose) | ||||||||||
9632 | Diag(MD->getParamDecl(MD->getMinRequiredArguments())->getLocation(), | ||||||||||
9633 | diag::note_nontrivial_default_arg) | ||||||||||
9634 | << MD->getParamDecl(MD->getMinRequiredArguments())->getSourceRange(); | ||||||||||
9635 | return false; | ||||||||||
9636 | } | ||||||||||
9637 | if (MD->isVariadic()) { | ||||||||||
9638 | if (Diagnose) | ||||||||||
9639 | Diag(MD->getLocation(), diag::note_nontrivial_variadic); | ||||||||||
9640 | return false; | ||||||||||
9641 | } | ||||||||||
9642 | |||||||||||
9643 | // C++11 [class.ctor]p5, C++11 [class.dtor]p5: | ||||||||||
9644 | // A copy/move [constructor or assignment operator] is trivial if | ||||||||||
9645 | // -- the [member] selected to copy/move each direct base class subobject | ||||||||||
9646 | // is trivial | ||||||||||
9647 | // | ||||||||||
9648 | // C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||||||||
9649 | // A [default constructor or destructor] is trivial if | ||||||||||
9650 | // -- all the direct base classes have trivial [default constructors or | ||||||||||
9651 | // destructors] | ||||||||||
9652 | for (const auto &BI : RD->bases()) | ||||||||||
9653 | if (!checkTrivialSubobjectCall(*this, BI.getBeginLoc(), BI.getType(), | ||||||||||
9654 | ConstArg, CSM, TSK_BaseClass, TAH, Diagnose)) | ||||||||||
9655 | return false; | ||||||||||
9656 | |||||||||||
9657 | // C++11 [class.ctor]p5, C++11 [class.dtor]p5: | ||||||||||
9658 | // A copy/move [constructor or assignment operator] for a class X is | ||||||||||
9659 | // trivial if | ||||||||||
9660 | // -- for each non-static data member of X that is of class type (or array | ||||||||||
9661 | // thereof), the constructor selected to copy/move that member is | ||||||||||
9662 | // trivial | ||||||||||
9663 | // | ||||||||||
9664 | // C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||||||||
9665 | // A [default constructor or destructor] is trivial if | ||||||||||
9666 | // -- for all of the non-static data members of its class that are of class | ||||||||||
9667 | // type (or array thereof), each such class has a trivial [default | ||||||||||
9668 | // constructor or destructor] | ||||||||||
9669 | if (!checkTrivialClassMembers(*this, RD, CSM, ConstArg, TAH, Diagnose)) | ||||||||||
9670 | return false; | ||||||||||
9671 | |||||||||||
9672 | // C++11 [class.dtor]p5: | ||||||||||
9673 | // A destructor is trivial if [...] | ||||||||||
9674 | // -- the destructor is not virtual | ||||||||||
9675 | if (CSM == CXXDestructor && MD->isVirtual()) { | ||||||||||
9676 | if (Diagnose) | ||||||||||
9677 | Diag(MD->getLocation(), diag::note_nontrivial_virtual_dtor) << RD; | ||||||||||
9678 | return false; | ||||||||||
9679 | } | ||||||||||
9680 | |||||||||||
9681 | // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||||||||
9682 | // A [special member] for class X is trivial if [...] | ||||||||||
9683 | // -- class X has no virtual functions and no virtual base classes | ||||||||||
9684 | if (CSM != CXXDestructor && MD->getParent()->isDynamicClass()) { | ||||||||||
9685 | if (!Diagnose) | ||||||||||
9686 | return false; | ||||||||||
9687 | |||||||||||
9688 | if (RD->getNumVBases()) { | ||||||||||
9689 | // Check for virtual bases. We already know that the corresponding | ||||||||||
9690 | // member in all bases is trivial, so vbases must all be direct. | ||||||||||
9691 | CXXBaseSpecifier &BS = *RD->vbases_begin(); | ||||||||||
9692 | assert(BS.isVirtual())(static_cast <bool> (BS.isVirtual()) ? void (0) : __assert_fail ("BS.isVirtual()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9692, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9693 | Diag(BS.getBeginLoc(), diag::note_nontrivial_has_virtual) << RD << 1; | ||||||||||
9694 | return false; | ||||||||||
9695 | } | ||||||||||
9696 | |||||||||||
9697 | // Must have a virtual method. | ||||||||||
9698 | for (const auto *MI : RD->methods()) { | ||||||||||
9699 | if (MI->isVirtual()) { | ||||||||||
9700 | SourceLocation MLoc = MI->getBeginLoc(); | ||||||||||
9701 | Diag(MLoc, diag::note_nontrivial_has_virtual) << RD << 0; | ||||||||||
9702 | return false; | ||||||||||
9703 | } | ||||||||||
9704 | } | ||||||||||
9705 | |||||||||||
9706 | llvm_unreachable("dynamic class with no vbases and no virtual functions")::llvm::llvm_unreachable_internal("dynamic class with no vbases and no virtual functions" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9706); | ||||||||||
9707 | } | ||||||||||
9708 | |||||||||||
9709 | // Looks like it's trivial! | ||||||||||
9710 | return true; | ||||||||||
9711 | } | ||||||||||
9712 | |||||||||||
9713 | namespace { | ||||||||||
9714 | struct FindHiddenVirtualMethod { | ||||||||||
9715 | Sema *S; | ||||||||||
9716 | CXXMethodDecl *Method; | ||||||||||
9717 | llvm::SmallPtrSet<const CXXMethodDecl *, 8> OverridenAndUsingBaseMethods; | ||||||||||
9718 | SmallVector<CXXMethodDecl *, 8> OverloadedMethods; | ||||||||||
9719 | |||||||||||
9720 | private: | ||||||||||
9721 | /// Check whether any most overridden method from MD in Methods | ||||||||||
9722 | static bool CheckMostOverridenMethods( | ||||||||||
9723 | const CXXMethodDecl *MD, | ||||||||||
9724 | const llvm::SmallPtrSetImpl<const CXXMethodDecl *> &Methods) { | ||||||||||
9725 | if (MD->size_overridden_methods() == 0) | ||||||||||
9726 | return Methods.count(MD->getCanonicalDecl()); | ||||||||||
9727 | for (const CXXMethodDecl *O : MD->overridden_methods()) | ||||||||||
9728 | if (CheckMostOverridenMethods(O, Methods)) | ||||||||||
9729 | return true; | ||||||||||
9730 | return false; | ||||||||||
9731 | } | ||||||||||
9732 | |||||||||||
9733 | public: | ||||||||||
9734 | /// Member lookup function that determines whether a given C++ | ||||||||||
9735 | /// method overloads virtual methods in a base class without overriding any, | ||||||||||
9736 | /// to be used with CXXRecordDecl::lookupInBases(). | ||||||||||
9737 | bool operator()(const CXXBaseSpecifier *Specifier, CXXBasePath &Path) { | ||||||||||
9738 | RecordDecl *BaseRecord = | ||||||||||
9739 | Specifier->getType()->castAs<RecordType>()->getDecl(); | ||||||||||
9740 | |||||||||||
9741 | DeclarationName Name = Method->getDeclName(); | ||||||||||
9742 | assert(Name.getNameKind() == DeclarationName::Identifier)(static_cast <bool> (Name.getNameKind() == DeclarationName ::Identifier) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::Identifier" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 9742, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
9743 | |||||||||||
9744 | bool foundSameNameMethod = false; | ||||||||||
9745 | SmallVector<CXXMethodDecl *, 8> overloadedMethods; | ||||||||||
9746 | for (Path.Decls = BaseRecord->lookup(Name).begin(); | ||||||||||
9747 | Path.Decls != DeclContext::lookup_iterator(); ++Path.Decls) { | ||||||||||
9748 | NamedDecl *D = *Path.Decls; | ||||||||||
9749 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { | ||||||||||
9750 | MD = MD->getCanonicalDecl(); | ||||||||||
9751 | foundSameNameMethod = true; | ||||||||||
9752 | // Interested only in hidden virtual methods. | ||||||||||
9753 | if (!MD->isVirtual()) | ||||||||||
9754 | continue; | ||||||||||
9755 | // If the method we are checking overrides a method from its base | ||||||||||
9756 | // don't warn about the other overloaded methods. Clang deviates from | ||||||||||
9757 | // GCC by only diagnosing overloads of inherited virtual functions that | ||||||||||
9758 | // do not override any other virtual functions in the base. GCC's | ||||||||||
9759 | // -Woverloaded-virtual diagnoses any derived function hiding a virtual | ||||||||||
9760 | // function from a base class. These cases may be better served by a | ||||||||||
9761 | // warning (not specific to virtual functions) on call sites when the | ||||||||||
9762 | // call would select a different function from the base class, were it | ||||||||||
9763 | // visible. | ||||||||||
9764 | // See FIXME in test/SemaCXX/warn-overload-virtual.cpp for an example. | ||||||||||
9765 | if (!S->IsOverload(Method, MD, false)) | ||||||||||
9766 | return true; | ||||||||||
9767 | // Collect the overload only if its hidden. | ||||||||||
9768 | if (!CheckMostOverridenMethods(MD, OverridenAndUsingBaseMethods)) | ||||||||||
9769 | overloadedMethods.push_back(MD); | ||||||||||
9770 | } | ||||||||||
9771 | } | ||||||||||
9772 | |||||||||||
9773 | if (foundSameNameMethod) | ||||||||||
9774 | OverloadedMethods.append(overloadedMethods.begin(), | ||||||||||
9775 | overloadedMethods.end()); | ||||||||||
9776 | return foundSameNameMethod; | ||||||||||
9777 | } | ||||||||||
9778 | }; | ||||||||||
9779 | } // end anonymous namespace | ||||||||||
9780 | |||||||||||
9781 | /// Add the most overriden methods from MD to Methods | ||||||||||
9782 | static void AddMostOverridenMethods(const CXXMethodDecl *MD, | ||||||||||
9783 | llvm::SmallPtrSetImpl<const CXXMethodDecl *>& Methods) { | ||||||||||
9784 | if (MD->size_overridden_methods() == 0) | ||||||||||
9785 | Methods.insert(MD->getCanonicalDecl()); | ||||||||||
9786 | else | ||||||||||
9787 | for (const CXXMethodDecl *O : MD->overridden_methods()) | ||||||||||
9788 | AddMostOverridenMethods(O, Methods); | ||||||||||
9789 | } | ||||||||||
9790 | |||||||||||
9791 | /// Check if a method overloads virtual methods in a base class without | ||||||||||
9792 | /// overriding any. | ||||||||||
9793 | void Sema::FindHiddenVirtualMethods(CXXMethodDecl *MD, | ||||||||||
9794 | SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods) { | ||||||||||
9795 | if (!MD->getDeclName().isIdentifier()) | ||||||||||
9796 | return; | ||||||||||
9797 | |||||||||||
9798 | CXXBasePaths Paths(/*FindAmbiguities=*/true, // true to look in all bases. | ||||||||||
9799 | /*bool RecordPaths=*/false, | ||||||||||
9800 | /*bool DetectVirtual=*/false); | ||||||||||
9801 | FindHiddenVirtualMethod FHVM; | ||||||||||
9802 | FHVM.Method = MD; | ||||||||||
9803 | FHVM.S = this; | ||||||||||
9804 | |||||||||||
9805 | // Keep the base methods that were overridden or introduced in the subclass | ||||||||||
9806 | // by 'using' in a set. A base method not in this set is hidden. | ||||||||||
9807 | CXXRecordDecl *DC = MD->getParent(); | ||||||||||
9808 | DeclContext::lookup_result R = DC->lookup(MD->getDeclName()); | ||||||||||
9809 | for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) { | ||||||||||
9810 | NamedDecl *ND = *I; | ||||||||||
9811 | if (UsingShadowDecl *shad = dyn_cast<UsingShadowDecl>(*I)) | ||||||||||
9812 | ND = shad->getTargetDecl(); | ||||||||||
9813 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND)) | ||||||||||
9814 | AddMostOverridenMethods(MD, FHVM.OverridenAndUsingBaseMethods); | ||||||||||
9815 | } | ||||||||||
9816 | |||||||||||
9817 | if (DC->lookupInBases(FHVM, Paths)) | ||||||||||
9818 | OverloadedMethods = FHVM.OverloadedMethods; | ||||||||||
9819 | } | ||||||||||
9820 | |||||||||||
9821 | void Sema::NoteHiddenVirtualMethods(CXXMethodDecl *MD, | ||||||||||
9822 | SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods) { | ||||||||||
9823 | for (unsigned i = 0, e = OverloadedMethods.size(); i != e; ++i) { | ||||||||||
9824 | CXXMethodDecl *overloadedMD = OverloadedMethods[i]; | ||||||||||
9825 | PartialDiagnostic PD = PDiag( | ||||||||||
9826 | diag::note_hidden_overloaded_virtual_declared_here) << overloadedMD; | ||||||||||
9827 | HandleFunctionTypeMismatch(PD, MD->getType(), overloadedMD->getType()); | ||||||||||
9828 | Diag(overloadedMD->getLocation(), PD); | ||||||||||
9829 | } | ||||||||||
9830 | } | ||||||||||
9831 | |||||||||||
9832 | /// Diagnose methods which overload virtual methods in a base class | ||||||||||
9833 | /// without overriding any. | ||||||||||
9834 | void Sema::DiagnoseHiddenVirtualMethods(CXXMethodDecl *MD) { | ||||||||||
9835 | if (MD->isInvalidDecl()) | ||||||||||
9836 | return; | ||||||||||
9837 | |||||||||||
9838 | if (Diags.isIgnored(diag::warn_overloaded_virtual, MD->getLocation())) | ||||||||||
9839 | return; | ||||||||||
9840 | |||||||||||
9841 | SmallVector<CXXMethodDecl *, 8> OverloadedMethods; | ||||||||||
9842 | FindHiddenVirtualMethods(MD, OverloadedMethods); | ||||||||||
9843 | if (!OverloadedMethods.empty()) { | ||||||||||
9844 | Diag(MD->getLocation(), diag::warn_overloaded_virtual) | ||||||||||
9845 | << MD << (OverloadedMethods.size() > 1); | ||||||||||
9846 | |||||||||||
9847 | NoteHiddenVirtualMethods(MD, OverloadedMethods); | ||||||||||
9848 | } | ||||||||||
9849 | } | ||||||||||
9850 | |||||||||||
9851 | void Sema::checkIllFormedTrivialABIStruct(CXXRecordDecl &RD) { | ||||||||||
9852 | auto PrintDiagAndRemoveAttr = [&](unsigned N) { | ||||||||||
9853 | // No diagnostics if this is a template instantiation. | ||||||||||
9854 | if (!isTemplateInstantiation(RD.getTemplateSpecializationKind())) { | ||||||||||
9855 | Diag(RD.getAttr<TrivialABIAttr>()->getLocation(), | ||||||||||
9856 | diag::ext_cannot_use_trivial_abi) << &RD; | ||||||||||
9857 | Diag(RD.getAttr<TrivialABIAttr>()->getLocation(), | ||||||||||
9858 | diag::note_cannot_use_trivial_abi_reason) << &RD << N; | ||||||||||
9859 | } | ||||||||||
9860 | RD.dropAttr<TrivialABIAttr>(); | ||||||||||
9861 | }; | ||||||||||
9862 | |||||||||||
9863 | // Ill-formed if the copy and move constructors are deleted. | ||||||||||
9864 | auto HasNonDeletedCopyOrMoveConstructor = [&]() { | ||||||||||
9865 | // If the type is dependent, then assume it might have | ||||||||||
9866 | // implicit copy or move ctor because we won't know yet at this point. | ||||||||||
9867 | if (RD.isDependentType()) | ||||||||||
9868 | return true; | ||||||||||
9869 | if (RD.needsImplicitCopyConstructor() && | ||||||||||
9870 | !RD.defaultedCopyConstructorIsDeleted()) | ||||||||||
9871 | return true; | ||||||||||
9872 | if (RD.needsImplicitMoveConstructor() && | ||||||||||
9873 | !RD.defaultedMoveConstructorIsDeleted()) | ||||||||||
9874 | return true; | ||||||||||
9875 | for (const CXXConstructorDecl *CD : RD.ctors()) | ||||||||||
9876 | if (CD->isCopyOrMoveConstructor() && !CD->isDeleted()) | ||||||||||
9877 | return true; | ||||||||||
9878 | return false; | ||||||||||
9879 | }; | ||||||||||
9880 | |||||||||||
9881 | if (!HasNonDeletedCopyOrMoveConstructor()) { | ||||||||||
9882 | PrintDiagAndRemoveAttr(0); | ||||||||||
9883 | return; | ||||||||||
9884 | } | ||||||||||
9885 | |||||||||||
9886 | // Ill-formed if the struct has virtual functions. | ||||||||||
9887 | if (RD.isPolymorphic()) { | ||||||||||
9888 | PrintDiagAndRemoveAttr(1); | ||||||||||
9889 | return; | ||||||||||
9890 | } | ||||||||||
9891 | |||||||||||
9892 | for (const auto &B : RD.bases()) { | ||||||||||
9893 | // Ill-formed if the base class is non-trivial for the purpose of calls or a | ||||||||||
9894 | // virtual base. | ||||||||||
9895 | if (!B.getType()->isDependentType() && | ||||||||||
9896 | !B.getType()->getAsCXXRecordDecl()->canPassInRegisters()) { | ||||||||||
9897 | PrintDiagAndRemoveAttr(2); | ||||||||||
9898 | return; | ||||||||||
9899 | } | ||||||||||
9900 | |||||||||||
9901 | if (B.isVirtual()) { | ||||||||||
9902 | PrintDiagAndRemoveAttr(3); | ||||||||||
9903 | return; | ||||||||||
9904 | } | ||||||||||
9905 | } | ||||||||||
9906 | |||||||||||
9907 | for (const auto *FD : RD.fields()) { | ||||||||||
9908 | // Ill-formed if the field is an ObjectiveC pointer or of a type that is | ||||||||||
9909 | // non-trivial for the purpose of calls. | ||||||||||
9910 | QualType FT = FD->getType(); | ||||||||||
9911 | if (FT.getObjCLifetime() == Qualifiers::OCL_Weak) { | ||||||||||
9912 | PrintDiagAndRemoveAttr(4); | ||||||||||
9913 | return; | ||||||||||
9914 | } | ||||||||||
9915 | |||||||||||
9916 | if (const auto *RT = FT->getBaseElementTypeUnsafe()->getAs<RecordType>()) | ||||||||||
9917 | if (!RT->isDependentType() && | ||||||||||
9918 | !cast<CXXRecordDecl>(RT->getDecl())->canPassInRegisters()) { | ||||||||||
9919 | PrintDiagAndRemoveAttr(5); | ||||||||||
9920 | return; | ||||||||||
9921 | } | ||||||||||
9922 | } | ||||||||||
9923 | } | ||||||||||
9924 | |||||||||||
9925 | void Sema::ActOnFinishCXXMemberSpecification( | ||||||||||
9926 | Scope *S, SourceLocation RLoc, Decl *TagDecl, SourceLocation LBrac, | ||||||||||
9927 | SourceLocation RBrac, const ParsedAttributesView &AttrList) { | ||||||||||
9928 | if (!TagDecl) | ||||||||||
9929 | return; | ||||||||||
9930 | |||||||||||
9931 | AdjustDeclIfTemplate(TagDecl); | ||||||||||
9932 | |||||||||||
9933 | for (const ParsedAttr &AL : AttrList) { | ||||||||||
9934 | if (AL.getKind() != ParsedAttr::AT_Visibility) | ||||||||||
9935 | continue; | ||||||||||
9936 | AL.setInvalid(); | ||||||||||
9937 | Diag(AL.getLoc(), diag::warn_attribute_after_definition_ignored) << AL; | ||||||||||
9938 | } | ||||||||||
9939 | |||||||||||
9940 | ActOnFields(S, RLoc, TagDecl, llvm::makeArrayRef( | ||||||||||
9941 | // strict aliasing violation! | ||||||||||
9942 | reinterpret_cast<Decl**>(FieldCollector->getCurFields()), | ||||||||||
9943 | FieldCollector->getCurNumFields()), LBrac, RBrac, AttrList); | ||||||||||
9944 | |||||||||||
9945 | CheckCompletedCXXClass(S, cast<CXXRecordDecl>(TagDecl)); | ||||||||||
9946 | } | ||||||||||
9947 | |||||||||||
9948 | /// Find the equality comparison functions that should be implicitly declared | ||||||||||
9949 | /// in a given class definition, per C++2a [class.compare.default]p3. | ||||||||||
9950 | static void findImplicitlyDeclaredEqualityComparisons( | ||||||||||
9951 | ASTContext &Ctx, CXXRecordDecl *RD, | ||||||||||
9952 | llvm::SmallVectorImpl<FunctionDecl *> &Spaceships) { | ||||||||||
9953 | DeclarationName EqEq = Ctx.DeclarationNames.getCXXOperatorName(OO_EqualEqual); | ||||||||||
9954 | if (!RD->lookup(EqEq).empty()) | ||||||||||
9955 | // Member operator== explicitly declared: no implicit operator==s. | ||||||||||
9956 | return; | ||||||||||
9957 | |||||||||||
9958 | // Traverse friends looking for an '==' or a '<=>'. | ||||||||||
9959 | for (FriendDecl *Friend : RD->friends()) { | ||||||||||
9960 | FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(Friend->getFriendDecl()); | ||||||||||
9961 | if (!FD) continue; | ||||||||||
9962 | |||||||||||
9963 | if (FD->getOverloadedOperator() == OO_EqualEqual) { | ||||||||||
9964 | // Friend operator== explicitly declared: no implicit operator==s. | ||||||||||
9965 | Spaceships.clear(); | ||||||||||
9966 | return; | ||||||||||
9967 | } | ||||||||||
9968 | |||||||||||
9969 | if (FD->getOverloadedOperator() == OO_Spaceship && | ||||||||||
9970 | FD->isExplicitlyDefaulted()) | ||||||||||
9971 | Spaceships.push_back(FD); | ||||||||||
9972 | } | ||||||||||
9973 | |||||||||||
9974 | // Look for members named 'operator<=>'. | ||||||||||
9975 | DeclarationName Cmp = Ctx.DeclarationNames.getCXXOperatorName(OO_Spaceship); | ||||||||||
9976 | for (NamedDecl *ND : RD->lookup(Cmp)) { | ||||||||||
9977 | // Note that we could find a non-function here (either a function template | ||||||||||
9978 | // or a using-declaration). Neither case results in an implicit | ||||||||||
9979 | // 'operator=='. | ||||||||||
9980 | if (auto *FD = dyn_cast<FunctionDecl>(ND)) | ||||||||||
9981 | if (FD->isExplicitlyDefaulted()) | ||||||||||
9982 | Spaceships.push_back(FD); | ||||||||||
9983 | } | ||||||||||
9984 | } | ||||||||||
9985 | |||||||||||
9986 | /// AddImplicitlyDeclaredMembersToClass - Adds any implicitly-declared | ||||||||||
9987 | /// special functions, such as the default constructor, copy | ||||||||||
9988 | /// constructor, or destructor, to the given C++ class (C++ | ||||||||||
9989 | /// [special]p1). This routine can only be executed just before the | ||||||||||
9990 | /// definition of the class is complete. | ||||||||||
9991 | void Sema::AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl) { | ||||||||||
9992 | // Don't add implicit special members to templated classes. | ||||||||||
9993 | // FIXME: This means unqualified lookups for 'operator=' within a class | ||||||||||
9994 | // template don't work properly. | ||||||||||
9995 | if (!ClassDecl->isDependentType()) { | ||||||||||
9996 | if (ClassDecl->needsImplicitDefaultConstructor()) { | ||||||||||
9997 | ++getASTContext().NumImplicitDefaultConstructors; | ||||||||||
9998 | |||||||||||
9999 | if (ClassDecl->hasInheritedConstructor()) | ||||||||||
10000 | DeclareImplicitDefaultConstructor(ClassDecl); | ||||||||||
10001 | } | ||||||||||
10002 | |||||||||||
10003 | if (ClassDecl->needsImplicitCopyConstructor()) { | ||||||||||
10004 | ++getASTContext().NumImplicitCopyConstructors; | ||||||||||
10005 | |||||||||||
10006 | // If the properties or semantics of the copy constructor couldn't be | ||||||||||
10007 | // determined while the class was being declared, force a declaration | ||||||||||
10008 | // of it now. | ||||||||||
10009 | if (ClassDecl->needsOverloadResolutionForCopyConstructor() || | ||||||||||
10010 | ClassDecl->hasInheritedConstructor()) | ||||||||||
10011 | DeclareImplicitCopyConstructor(ClassDecl); | ||||||||||
10012 | // For the MS ABI we need to know whether the copy ctor is deleted. A | ||||||||||
10013 | // prerequisite for deleting the implicit copy ctor is that the class has | ||||||||||
10014 | // a move ctor or move assignment that is either user-declared or whose | ||||||||||
10015 | // semantics are inherited from a subobject. FIXME: We should provide a | ||||||||||
10016 | // more direct way for CodeGen to ask whether the constructor was deleted. | ||||||||||
10017 | else if (Context.getTargetInfo().getCXXABI().isMicrosoft() && | ||||||||||
10018 | (ClassDecl->hasUserDeclaredMoveConstructor() || | ||||||||||
10019 | ClassDecl->needsOverloadResolutionForMoveConstructor() || | ||||||||||
10020 | ClassDecl->hasUserDeclaredMoveAssignment() || | ||||||||||
10021 | ClassDecl->needsOverloadResolutionForMoveAssignment())) | ||||||||||
10022 | DeclareImplicitCopyConstructor(ClassDecl); | ||||||||||
10023 | } | ||||||||||
10024 | |||||||||||
10025 | if (getLangOpts().CPlusPlus11 && | ||||||||||
10026 | ClassDecl->needsImplicitMoveConstructor()) { | ||||||||||
10027 | ++getASTContext().NumImplicitMoveConstructors; | ||||||||||
10028 | |||||||||||
10029 | if (ClassDecl->needsOverloadResolutionForMoveConstructor() || | ||||||||||
10030 | ClassDecl->hasInheritedConstructor()) | ||||||||||
10031 | DeclareImplicitMoveConstructor(ClassDecl); | ||||||||||
10032 | } | ||||||||||
10033 | |||||||||||
10034 | if (ClassDecl->needsImplicitCopyAssignment()) { | ||||||||||
10035 | ++getASTContext().NumImplicitCopyAssignmentOperators; | ||||||||||
10036 | |||||||||||
10037 | // If we have a dynamic class, then the copy assignment operator may be | ||||||||||
10038 | // virtual, so we have to declare it immediately. This ensures that, e.g., | ||||||||||
10039 | // it shows up in the right place in the vtable and that we diagnose | ||||||||||
10040 | // problems with the implicit exception specification. | ||||||||||
10041 | if (ClassDecl->isDynamicClass() || | ||||||||||
10042 | ClassDecl->needsOverloadResolutionForCopyAssignment() || | ||||||||||
10043 | ClassDecl->hasInheritedAssignment()) | ||||||||||
10044 | DeclareImplicitCopyAssignment(ClassDecl); | ||||||||||
10045 | } | ||||||||||
10046 | |||||||||||
10047 | if (getLangOpts().CPlusPlus11 && ClassDecl->needsImplicitMoveAssignment()) { | ||||||||||
10048 | ++getASTContext().NumImplicitMoveAssignmentOperators; | ||||||||||
10049 | |||||||||||
10050 | // Likewise for the move assignment operator. | ||||||||||
10051 | if (ClassDecl->isDynamicClass() || | ||||||||||
10052 | ClassDecl->needsOverloadResolutionForMoveAssignment() || | ||||||||||
10053 | ClassDecl->hasInheritedAssignment()) | ||||||||||
10054 | DeclareImplicitMoveAssignment(ClassDecl); | ||||||||||
10055 | } | ||||||||||
10056 | |||||||||||
10057 | if (ClassDecl->needsImplicitDestructor()) { | ||||||||||
10058 | ++getASTContext().NumImplicitDestructors; | ||||||||||
10059 | |||||||||||
10060 | // If we have a dynamic class, then the destructor may be virtual, so we | ||||||||||
10061 | // have to declare the destructor immediately. This ensures that, e.g., it | ||||||||||
10062 | // shows up in the right place in the vtable and that we diagnose problems | ||||||||||
10063 | // with the implicit exception specification. | ||||||||||
10064 | if (ClassDecl->isDynamicClass() || | ||||||||||
10065 | ClassDecl->needsOverloadResolutionForDestructor()) | ||||||||||
10066 | DeclareImplicitDestructor(ClassDecl); | ||||||||||
10067 | } | ||||||||||
10068 | } | ||||||||||
10069 | |||||||||||
10070 | // C++2a [class.compare.default]p3: | ||||||||||
10071 | // If the member-specification does not explicitly declare any member or | ||||||||||
10072 | // friend named operator==, an == operator function is declared implicitly | ||||||||||
10073 | // for each defaulted three-way comparison operator function defined in | ||||||||||
10074 | // the member-specification | ||||||||||
10075 | // FIXME: Consider doing this lazily. | ||||||||||
10076 | // We do this during the initial parse for a class template, not during | ||||||||||
10077 | // instantiation, so that we can handle unqualified lookups for 'operator==' | ||||||||||
10078 | // when parsing the template. | ||||||||||
10079 | if (getLangOpts().CPlusPlus20 && !inTemplateInstantiation()) { | ||||||||||
10080 | llvm::SmallVector<FunctionDecl *, 4> DefaultedSpaceships; | ||||||||||
10081 | findImplicitlyDeclaredEqualityComparisons(Context, ClassDecl, | ||||||||||
10082 | DefaultedSpaceships); | ||||||||||
10083 | for (auto *FD : DefaultedSpaceships) | ||||||||||
10084 | DeclareImplicitEqualityComparison(ClassDecl, FD); | ||||||||||
10085 | } | ||||||||||
10086 | } | ||||||||||
10087 | |||||||||||
10088 | unsigned | ||||||||||
10089 | Sema::ActOnReenterTemplateScope(Decl *D, | ||||||||||
10090 | llvm::function_ref<Scope *()> EnterScope) { | ||||||||||
10091 | if (!D) | ||||||||||
10092 | return 0; | ||||||||||
10093 | AdjustDeclIfTemplate(D); | ||||||||||
10094 | |||||||||||
10095 | // In order to get name lookup right, reenter template scopes in order from | ||||||||||
10096 | // outermost to innermost. | ||||||||||
10097 | SmallVector<TemplateParameterList *, 4> ParameterLists; | ||||||||||
10098 | DeclContext *LookupDC = dyn_cast<DeclContext>(D); | ||||||||||
10099 | |||||||||||
10100 | if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) { | ||||||||||
10101 | for (unsigned i = 0; i < DD->getNumTemplateParameterLists(); ++i) | ||||||||||
10102 | ParameterLists.push_back(DD->getTemplateParameterList(i)); | ||||||||||
10103 | |||||||||||
10104 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||||||
10105 | if (FunctionTemplateDecl *FTD = FD->getDescribedFunctionTemplate()) | ||||||||||
10106 | ParameterLists.push_back(FTD->getTemplateParameters()); | ||||||||||
10107 | } else if (VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||||||
10108 | LookupDC = VD->getDeclContext(); | ||||||||||
10109 | |||||||||||
10110 | if (VarTemplateDecl *VTD = VD->getDescribedVarTemplate()) | ||||||||||
10111 | ParameterLists.push_back(VTD->getTemplateParameters()); | ||||||||||
10112 | else if (auto *PSD = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) | ||||||||||
10113 | ParameterLists.push_back(PSD->getTemplateParameters()); | ||||||||||
10114 | } | ||||||||||
10115 | } else if (TagDecl *TD = dyn_cast<TagDecl>(D)) { | ||||||||||
10116 | for (unsigned i = 0; i < TD->getNumTemplateParameterLists(); ++i) | ||||||||||
10117 | ParameterLists.push_back(TD->getTemplateParameterList(i)); | ||||||||||
10118 | |||||||||||
10119 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(TD)) { | ||||||||||
10120 | if (ClassTemplateDecl *CTD = RD->getDescribedClassTemplate()) | ||||||||||
10121 | ParameterLists.push_back(CTD->getTemplateParameters()); | ||||||||||
10122 | else if (auto *PSD = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) | ||||||||||
10123 | ParameterLists.push_back(PSD->getTemplateParameters()); | ||||||||||
10124 | } | ||||||||||
10125 | } | ||||||||||
10126 | // FIXME: Alias declarations and concepts. | ||||||||||
10127 | |||||||||||
10128 | unsigned Count = 0; | ||||||||||
10129 | Scope *InnermostTemplateScope = nullptr; | ||||||||||
10130 | for (TemplateParameterList *Params : ParameterLists) { | ||||||||||
10131 | // Ignore explicit specializations; they don't contribute to the template | ||||||||||
10132 | // depth. | ||||||||||
10133 | if (Params->size() == 0) | ||||||||||
10134 | continue; | ||||||||||
10135 | |||||||||||
10136 | InnermostTemplateScope = EnterScope(); | ||||||||||
10137 | for (NamedDecl *Param : *Params) { | ||||||||||
10138 | if (Param->getDeclName()) { | ||||||||||
10139 | InnermostTemplateScope->AddDecl(Param); | ||||||||||
10140 | IdResolver.AddDecl(Param); | ||||||||||
10141 | } | ||||||||||
10142 | } | ||||||||||
10143 | ++Count; | ||||||||||
10144 | } | ||||||||||
10145 | |||||||||||
10146 | // Associate the new template scopes with the corresponding entities. | ||||||||||
10147 | if (InnermostTemplateScope) { | ||||||||||
10148 | assert(LookupDC && "no enclosing DeclContext for template lookup")(static_cast <bool> (LookupDC && "no enclosing DeclContext for template lookup" ) ? void (0) : __assert_fail ("LookupDC && \"no enclosing DeclContext for template lookup\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 10148, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
10149 | EnterTemplatedContext(InnermostTemplateScope, LookupDC); | ||||||||||
10150 | } | ||||||||||
10151 | |||||||||||
10152 | return Count; | ||||||||||
10153 | } | ||||||||||
10154 | |||||||||||
10155 | void Sema::ActOnStartDelayedMemberDeclarations(Scope *S, Decl *RecordD) { | ||||||||||
10156 | if (!RecordD) return; | ||||||||||
10157 | AdjustDeclIfTemplate(RecordD); | ||||||||||
10158 | CXXRecordDecl *Record = cast<CXXRecordDecl>(RecordD); | ||||||||||
10159 | PushDeclContext(S, Record); | ||||||||||
10160 | } | ||||||||||
10161 | |||||||||||
10162 | void Sema::ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *RecordD) { | ||||||||||
10163 | if (!RecordD) return; | ||||||||||
10164 | PopDeclContext(); | ||||||||||
10165 | } | ||||||||||
10166 | |||||||||||
10167 | /// This is used to implement the constant expression evaluation part of the | ||||||||||
10168 | /// attribute enable_if extension. There is nothing in standard C++ which would | ||||||||||
10169 | /// require reentering parameters. | ||||||||||
10170 | void Sema::ActOnReenterCXXMethodParameter(Scope *S, ParmVarDecl *Param) { | ||||||||||
10171 | if (!Param) | ||||||||||
10172 | return; | ||||||||||
10173 | |||||||||||
10174 | S->AddDecl(Param); | ||||||||||
10175 | if (Param->getDeclName()) | ||||||||||
10176 | IdResolver.AddDecl(Param); | ||||||||||
10177 | } | ||||||||||
10178 | |||||||||||
10179 | /// ActOnStartDelayedCXXMethodDeclaration - We have completed | ||||||||||
10180 | /// parsing a top-level (non-nested) C++ class, and we are now | ||||||||||
10181 | /// parsing those parts of the given Method declaration that could | ||||||||||
10182 | /// not be parsed earlier (C++ [class.mem]p2), such as default | ||||||||||
10183 | /// arguments. This action should enter the scope of the given | ||||||||||
10184 | /// Method declaration as if we had just parsed the qualified method | ||||||||||
10185 | /// name. However, it should not bring the parameters into scope; | ||||||||||
10186 | /// that will be performed by ActOnDelayedCXXMethodParameter. | ||||||||||
10187 | void Sema::ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *MethodD) { | ||||||||||
10188 | } | ||||||||||
10189 | |||||||||||
10190 | /// ActOnDelayedCXXMethodParameter - We've already started a delayed | ||||||||||
10191 | /// C++ method declaration. We're (re-)introducing the given | ||||||||||
10192 | /// function parameter into scope for use in parsing later parts of | ||||||||||
10193 | /// the method declaration. For example, we could see an | ||||||||||
10194 | /// ActOnParamDefaultArgument event for this parameter. | ||||||||||
10195 | void Sema::ActOnDelayedCXXMethodParameter(Scope *S, Decl *ParamD) { | ||||||||||
10196 | if (!ParamD) | ||||||||||
10197 | return; | ||||||||||
10198 | |||||||||||
10199 | ParmVarDecl *Param = cast<ParmVarDecl>(ParamD); | ||||||||||
10200 | |||||||||||
10201 | S->AddDecl(Param); | ||||||||||
10202 | if (Param->getDeclName()) | ||||||||||
10203 | IdResolver.AddDecl(Param); | ||||||||||
10204 | } | ||||||||||
10205 | |||||||||||
10206 | /// ActOnFinishDelayedCXXMethodDeclaration - We have finished | ||||||||||
10207 | /// processing the delayed method declaration for Method. The method | ||||||||||
10208 | /// declaration is now considered finished. There may be a separate | ||||||||||
10209 | /// ActOnStartOfFunctionDef action later (not necessarily | ||||||||||
10210 | /// immediately!) for this method, if it was also defined inside the | ||||||||||
10211 | /// class body. | ||||||||||
10212 | void Sema::ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *MethodD) { | ||||||||||
10213 | if (!MethodD) | ||||||||||
10214 | return; | ||||||||||
10215 | |||||||||||
10216 | AdjustDeclIfTemplate(MethodD); | ||||||||||
10217 | |||||||||||
10218 | FunctionDecl *Method = cast<FunctionDecl>(MethodD); | ||||||||||
10219 | |||||||||||
10220 | // Now that we have our default arguments, check the constructor | ||||||||||
10221 | // again. It could produce additional diagnostics or affect whether | ||||||||||
10222 | // the class has implicitly-declared destructors, among other | ||||||||||
10223 | // things. | ||||||||||
10224 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Method)) | ||||||||||
10225 | CheckConstructor(Constructor); | ||||||||||
10226 | |||||||||||
10227 | // Check the default arguments, which we may have added. | ||||||||||
10228 | if (!Method->isInvalidDecl()) | ||||||||||
10229 | CheckCXXDefaultArguments(Method); | ||||||||||
10230 | } | ||||||||||
10231 | |||||||||||
10232 | // Emit the given diagnostic for each non-address-space qualifier. | ||||||||||
10233 | // Common part of CheckConstructorDeclarator and CheckDestructorDeclarator. | ||||||||||
10234 | static void checkMethodTypeQualifiers(Sema &S, Declarator &D, unsigned DiagID) { | ||||||||||
10235 | const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||||||
10236 | if (FTI.hasMethodTypeQualifiers() && !D.isInvalidType()) { | ||||||||||
10237 | bool DiagOccured = false; | ||||||||||
10238 | FTI.MethodQualifiers->forEachQualifier( | ||||||||||
10239 | [DiagID, &S, &DiagOccured](DeclSpec::TQ, StringRef QualName, | ||||||||||
10240 | SourceLocation SL) { | ||||||||||
10241 | // This diagnostic should be emitted on any qualifier except an addr | ||||||||||
10242 | // space qualifier. However, forEachQualifier currently doesn't visit | ||||||||||
10243 | // addr space qualifiers, so there's no way to write this condition | ||||||||||
10244 | // right now; we just diagnose on everything. | ||||||||||
10245 | S.Diag(SL, DiagID) << QualName << SourceRange(SL); | ||||||||||
10246 | DiagOccured = true; | ||||||||||
10247 | }); | ||||||||||
10248 | if (DiagOccured) | ||||||||||
10249 | D.setInvalidType(); | ||||||||||
10250 | } | ||||||||||
10251 | } | ||||||||||
10252 | |||||||||||
10253 | /// CheckConstructorDeclarator - Called by ActOnDeclarator to check | ||||||||||
10254 | /// the well-formedness of the constructor declarator @p D with type @p | ||||||||||
10255 | /// R. If there are any errors in the declarator, this routine will | ||||||||||
10256 | /// emit diagnostics and set the invalid bit to true. In any case, the type | ||||||||||
10257 | /// will be updated to reflect a well-formed type for the constructor and | ||||||||||
10258 | /// returned. | ||||||||||
10259 | QualType Sema::CheckConstructorDeclarator(Declarator &D, QualType R, | ||||||||||
10260 | StorageClass &SC) { | ||||||||||
10261 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); | ||||||||||
10262 | |||||||||||
10263 | // C++ [class.ctor]p3: | ||||||||||
10264 | // A constructor shall not be virtual (10.3) or static (9.4). A | ||||||||||
10265 | // constructor can be invoked for a const, volatile or const | ||||||||||
10266 | // volatile object. A constructor shall not be declared const, | ||||||||||
10267 | // volatile, or const volatile (9.3.2). | ||||||||||
10268 | if (isVirtual) { | ||||||||||
10269 | if (!D.isInvalidType()) | ||||||||||
10270 | Diag(D.getIdentifierLoc(), diag::err_constructor_cannot_be) | ||||||||||
10271 | << "virtual" << SourceRange(D.getDeclSpec().getVirtualSpecLoc()) | ||||||||||
10272 | << SourceRange(D.getIdentifierLoc()); | ||||||||||
10273 | D.setInvalidType(); | ||||||||||
10274 | } | ||||||||||
10275 | if (SC == SC_Static) { | ||||||||||
10276 | if (!D.isInvalidType()) | ||||||||||
10277 | Diag(D.getIdentifierLoc(), diag::err_constructor_cannot_be) | ||||||||||
10278 | << "static" << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||||||||
10279 | << SourceRange(D.getIdentifierLoc()); | ||||||||||
10280 | D.setInvalidType(); | ||||||||||
10281 | SC = SC_None; | ||||||||||
10282 | } | ||||||||||
10283 | |||||||||||
10284 | if (unsigned TypeQuals = D.getDeclSpec().getTypeQualifiers()) { | ||||||||||
10285 | diagnoseIgnoredQualifiers( | ||||||||||
10286 | diag::err_constructor_return_type, TypeQuals, SourceLocation(), | ||||||||||
10287 | D.getDeclSpec().getConstSpecLoc(), D.getDeclSpec().getVolatileSpecLoc(), | ||||||||||
10288 | D.getDeclSpec().getRestrictSpecLoc(), | ||||||||||
10289 | D.getDeclSpec().getAtomicSpecLoc()); | ||||||||||
10290 | D.setInvalidType(); | ||||||||||
10291 | } | ||||||||||
10292 | |||||||||||
10293 | checkMethodTypeQualifiers(*this, D, diag::err_invalid_qualified_constructor); | ||||||||||
10294 | |||||||||||
10295 | // C++0x [class.ctor]p4: | ||||||||||
10296 | // A constructor shall not be declared with a ref-qualifier. | ||||||||||
10297 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||||||
10298 | if (FTI.hasRefQualifier()) { | ||||||||||
10299 | Diag(FTI.getRefQualifierLoc(), diag::err_ref_qualifier_constructor) | ||||||||||
10300 | << FTI.RefQualifierIsLValueRef | ||||||||||
10301 | << FixItHint::CreateRemoval(FTI.getRefQualifierLoc()); | ||||||||||
10302 | D.setInvalidType(); | ||||||||||
10303 | } | ||||||||||
10304 | |||||||||||
10305 | // Rebuild the function type "R" without any type qualifiers (in | ||||||||||
10306 | // case any of the errors above fired) and with "void" as the | ||||||||||
10307 | // return type, since constructors don't have return types. | ||||||||||
10308 | const FunctionProtoType *Proto = R->castAs<FunctionProtoType>(); | ||||||||||
10309 | if (Proto->getReturnType() == Context.VoidTy && !D.isInvalidType()) | ||||||||||
10310 | return R; | ||||||||||
10311 | |||||||||||
10312 | FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo(); | ||||||||||
10313 | EPI.TypeQuals = Qualifiers(); | ||||||||||
10314 | EPI.RefQualifier = RQ_None; | ||||||||||
10315 | |||||||||||
10316 | return Context.getFunctionType(Context.VoidTy, Proto->getParamTypes(), EPI); | ||||||||||
10317 | } | ||||||||||
10318 | |||||||||||
10319 | /// CheckConstructor - Checks a fully-formed constructor for | ||||||||||
10320 | /// well-formedness, issuing any diagnostics required. Returns true if | ||||||||||
10321 | /// the constructor declarator is invalid. | ||||||||||
10322 | void Sema::CheckConstructor(CXXConstructorDecl *Constructor) { | ||||||||||
10323 | CXXRecordDecl *ClassDecl | ||||||||||
10324 | = dyn_cast<CXXRecordDecl>(Constructor->getDeclContext()); | ||||||||||
10325 | if (!ClassDecl) | ||||||||||
10326 | return Constructor->setInvalidDecl(); | ||||||||||
10327 | |||||||||||
10328 | // C++ [class.copy]p3: | ||||||||||
10329 | // A declaration of a constructor for a class X is ill-formed if | ||||||||||
10330 | // its first parameter is of type (optionally cv-qualified) X and | ||||||||||
10331 | // either there are no other parameters or else all other | ||||||||||
10332 | // parameters have default arguments. | ||||||||||
10333 | if (!Constructor->isInvalidDecl() && | ||||||||||
10334 | Constructor->hasOneParamOrDefaultArgs() && | ||||||||||
10335 | Constructor->getTemplateSpecializationKind() != | ||||||||||
10336 | TSK_ImplicitInstantiation) { | ||||||||||
10337 | QualType ParamType = Constructor->getParamDecl(0)->getType(); | ||||||||||
10338 | QualType ClassTy = Context.getTagDeclType(ClassDecl); | ||||||||||
10339 | if (Context.getCanonicalType(ParamType).getUnqualifiedType() == ClassTy) { | ||||||||||
10340 | SourceLocation ParamLoc = Constructor->getParamDecl(0)->getLocation(); | ||||||||||
10341 | const char *ConstRef | ||||||||||
10342 | = Constructor->getParamDecl(0)->getIdentifier() ? "const &" | ||||||||||
10343 | : " const &"; | ||||||||||
10344 | Diag(ParamLoc, diag::err_constructor_byvalue_arg) | ||||||||||
10345 | << FixItHint::CreateInsertion(ParamLoc, ConstRef); | ||||||||||
10346 | |||||||||||
10347 | // FIXME: Rather that making the constructor invalid, we should endeavor | ||||||||||
10348 | // to fix the type. | ||||||||||
10349 | Constructor->setInvalidDecl(); | ||||||||||
10350 | } | ||||||||||
10351 | } | ||||||||||
10352 | } | ||||||||||
10353 | |||||||||||
10354 | /// CheckDestructor - Checks a fully-formed destructor definition for | ||||||||||
10355 | /// well-formedness, issuing any diagnostics required. Returns true | ||||||||||
10356 | /// on error. | ||||||||||
10357 | bool Sema::CheckDestructor(CXXDestructorDecl *Destructor) { | ||||||||||
10358 | CXXRecordDecl *RD = Destructor->getParent(); | ||||||||||
10359 | |||||||||||
10360 | if (!Destructor->getOperatorDelete() && Destructor->isVirtual()) { | ||||||||||
10361 | SourceLocation Loc; | ||||||||||
10362 | |||||||||||
10363 | if (!Destructor->isImplicit()) | ||||||||||
10364 | Loc = Destructor->getLocation(); | ||||||||||
10365 | else | ||||||||||
10366 | Loc = RD->getLocation(); | ||||||||||
10367 | |||||||||||
10368 | // If we have a virtual destructor, look up the deallocation function | ||||||||||
10369 | if (FunctionDecl *OperatorDelete = | ||||||||||
10370 | FindDeallocationFunctionForDestructor(Loc, RD)) { | ||||||||||
10371 | Expr *ThisArg = nullptr; | ||||||||||
10372 | |||||||||||
10373 | // If the notional 'delete this' expression requires a non-trivial | ||||||||||
10374 | // conversion from 'this' to the type of a destroying operator delete's | ||||||||||
10375 | // first parameter, perform that conversion now. | ||||||||||
10376 | if (OperatorDelete->isDestroyingOperatorDelete()) { | ||||||||||
10377 | QualType ParamType = OperatorDelete->getParamDecl(0)->getType(); | ||||||||||
10378 | if (!declaresSameEntity(ParamType->getAsCXXRecordDecl(), RD)) { | ||||||||||
10379 | // C++ [class.dtor]p13: | ||||||||||
10380 | // ... as if for the expression 'delete this' appearing in a | ||||||||||
10381 | // non-virtual destructor of the destructor's class. | ||||||||||
10382 | ContextRAII SwitchContext(*this, Destructor); | ||||||||||
10383 | ExprResult This = | ||||||||||
10384 | ActOnCXXThis(OperatorDelete->getParamDecl(0)->getLocation()); | ||||||||||
10385 | assert(!This.isInvalid() && "couldn't form 'this' expr in dtor?")(static_cast <bool> (!This.isInvalid() && "couldn't form 'this' expr in dtor?" ) ? void (0) : __assert_fail ("!This.isInvalid() && \"couldn't form 'this' expr in dtor?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 10385, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
10386 | This = PerformImplicitConversion(This.get(), ParamType, AA_Passing); | ||||||||||
10387 | if (This.isInvalid()) { | ||||||||||
10388 | // FIXME: Register this as a context note so that it comes out | ||||||||||
10389 | // in the right order. | ||||||||||
10390 | Diag(Loc, diag::note_implicit_delete_this_in_destructor_here); | ||||||||||
10391 | return true; | ||||||||||
10392 | } | ||||||||||
10393 | ThisArg = This.get(); | ||||||||||
10394 | } | ||||||||||
10395 | } | ||||||||||
10396 | |||||||||||
10397 | DiagnoseUseOfDecl(OperatorDelete, Loc); | ||||||||||
10398 | MarkFunctionReferenced(Loc, OperatorDelete); | ||||||||||
10399 | Destructor->setOperatorDelete(OperatorDelete, ThisArg); | ||||||||||
10400 | } | ||||||||||
10401 | } | ||||||||||
10402 | |||||||||||
10403 | return false; | ||||||||||
10404 | } | ||||||||||
10405 | |||||||||||
10406 | /// CheckDestructorDeclarator - Called by ActOnDeclarator to check | ||||||||||
10407 | /// the well-formednes of the destructor declarator @p D with type @p | ||||||||||
10408 | /// R. If there are any errors in the declarator, this routine will | ||||||||||
10409 | /// emit diagnostics and set the declarator to invalid. Even if this happens, | ||||||||||
10410 | /// will be updated to reflect a well-formed type for the destructor and | ||||||||||
10411 | /// returned. | ||||||||||
10412 | QualType Sema::CheckDestructorDeclarator(Declarator &D, QualType R, | ||||||||||
10413 | StorageClass& SC) { | ||||||||||
10414 | // C++ [class.dtor]p1: | ||||||||||
10415 | // [...] A typedef-name that names a class is a class-name | ||||||||||
10416 | // (7.1.3); however, a typedef-name that names a class shall not | ||||||||||
10417 | // be used as the identifier in the declarator for a destructor | ||||||||||
10418 | // declaration. | ||||||||||
10419 | QualType DeclaratorType = GetTypeFromParser(D.getName().DestructorName); | ||||||||||
10420 | if (const TypedefType *TT = DeclaratorType->getAs<TypedefType>()) | ||||||||||
10421 | Diag(D.getIdentifierLoc(), diag::ext_destructor_typedef_name) | ||||||||||
10422 | << DeclaratorType << isa<TypeAliasDecl>(TT->getDecl()); | ||||||||||
10423 | else if (const TemplateSpecializationType *TST = | ||||||||||
10424 | DeclaratorType->getAs<TemplateSpecializationType>()) | ||||||||||
10425 | if (TST->isTypeAlias()) | ||||||||||
10426 | Diag(D.getIdentifierLoc(), diag::ext_destructor_typedef_name) | ||||||||||
10427 | << DeclaratorType << 1; | ||||||||||
10428 | |||||||||||
10429 | // C++ [class.dtor]p2: | ||||||||||
10430 | // A destructor is used to destroy objects of its class type. A | ||||||||||
10431 | // destructor takes no parameters, and no return type can be | ||||||||||
10432 | // specified for it (not even void). The address of a destructor | ||||||||||
10433 | // shall not be taken. A destructor shall not be static. A | ||||||||||
10434 | // destructor can be invoked for a const, volatile or const | ||||||||||
10435 | // volatile object. A destructor shall not be declared const, | ||||||||||
10436 | // volatile or const volatile (9.3.2). | ||||||||||
10437 | if (SC == SC_Static) { | ||||||||||
10438 | if (!D.isInvalidType()) | ||||||||||
10439 | Diag(D.getIdentifierLoc(), diag::err_destructor_cannot_be) | ||||||||||
10440 | << "static" << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||||||||
10441 | << SourceRange(D.getIdentifierLoc()) | ||||||||||
10442 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||||||
10443 | |||||||||||
10444 | SC = SC_None; | ||||||||||
10445 | } | ||||||||||
10446 | if (!D.isInvalidType()) { | ||||||||||
10447 | // Destructors don't have return types, but the parser will | ||||||||||
10448 | // happily parse something like: | ||||||||||
10449 | // | ||||||||||
10450 | // class X { | ||||||||||
10451 | // float ~X(); | ||||||||||
10452 | // }; | ||||||||||
10453 | // | ||||||||||
10454 | // The return type will be eliminated later. | ||||||||||
10455 | if (D.getDeclSpec().hasTypeSpecifier()) | ||||||||||
10456 | Diag(D.getIdentifierLoc(), diag::err_destructor_return_type) | ||||||||||
10457 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) | ||||||||||
10458 | << SourceRange(D.getIdentifierLoc()); | ||||||||||
10459 | else if (unsigned TypeQuals = D.getDeclSpec().getTypeQualifiers()) { | ||||||||||
10460 | diagnoseIgnoredQualifiers(diag::err_destructor_return_type, TypeQuals, | ||||||||||
10461 | SourceLocation(), | ||||||||||
10462 | D.getDeclSpec().getConstSpecLoc(), | ||||||||||
10463 | D.getDeclSpec().getVolatileSpecLoc(), | ||||||||||
10464 | D.getDeclSpec().getRestrictSpecLoc(), | ||||||||||
10465 | D.getDeclSpec().getAtomicSpecLoc()); | ||||||||||
10466 | D.setInvalidType(); | ||||||||||
10467 | } | ||||||||||
10468 | } | ||||||||||
10469 | |||||||||||
10470 | checkMethodTypeQualifiers(*this, D, diag::err_invalid_qualified_destructor); | ||||||||||
10471 | |||||||||||
10472 | // C++0x [class.dtor]p2: | ||||||||||
10473 | // A destructor shall not be declared with a ref-qualifier. | ||||||||||
10474 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||||||
10475 | if (FTI.hasRefQualifier()) { | ||||||||||
10476 | Diag(FTI.getRefQualifierLoc(), diag::err_ref_qualifier_destructor) | ||||||||||
10477 | << FTI.RefQualifierIsLValueRef | ||||||||||
10478 | << FixItHint::CreateRemoval(FTI.getRefQualifierLoc()); | ||||||||||
10479 | D.setInvalidType(); | ||||||||||
10480 | } | ||||||||||
10481 | |||||||||||
10482 | // Make sure we don't have any parameters. | ||||||||||
10483 | if (FTIHasNonVoidParameters(FTI)) { | ||||||||||
10484 | Diag(D.getIdentifierLoc(), diag::err_destructor_with_params); | ||||||||||
10485 | |||||||||||
10486 | // Delete the parameters. | ||||||||||
10487 | FTI.freeParams(); | ||||||||||
10488 | D.setInvalidType(); | ||||||||||
10489 | } | ||||||||||
10490 | |||||||||||
10491 | // Make sure the destructor isn't variadic. | ||||||||||
10492 | if (FTI.isVariadic) { | ||||||||||
10493 | Diag(D.getIdentifierLoc(), diag::err_destructor_variadic); | ||||||||||
10494 | D.setInvalidType(); | ||||||||||
10495 | } | ||||||||||
10496 | |||||||||||
10497 | // Rebuild the function type "R" without any type qualifiers or | ||||||||||
10498 | // parameters (in case any of the errors above fired) and with | ||||||||||
10499 | // "void" as the return type, since destructors don't have return | ||||||||||
10500 | // types. | ||||||||||
10501 | if (!D.isInvalidType()) | ||||||||||
10502 | return R; | ||||||||||
10503 | |||||||||||
10504 | const FunctionProtoType *Proto = R->castAs<FunctionProtoType>(); | ||||||||||
10505 | FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo(); | ||||||||||
10506 | EPI.Variadic = false; | ||||||||||
10507 | EPI.TypeQuals = Qualifiers(); | ||||||||||
10508 | EPI.RefQualifier = RQ_None; | ||||||||||
10509 | return Context.getFunctionType(Context.VoidTy, None, EPI); | ||||||||||
10510 | } | ||||||||||
10511 | |||||||||||
10512 | static void extendLeft(SourceRange &R, SourceRange Before) { | ||||||||||
10513 | if (Before.isInvalid()) | ||||||||||
10514 | return; | ||||||||||
10515 | R.setBegin(Before.getBegin()); | ||||||||||
10516 | if (R.getEnd().isInvalid()) | ||||||||||
10517 | R.setEnd(Before.getEnd()); | ||||||||||
10518 | } | ||||||||||
10519 | |||||||||||
10520 | static void extendRight(SourceRange &R, SourceRange After) { | ||||||||||
10521 | if (After.isInvalid()) | ||||||||||
10522 | return; | ||||||||||
10523 | if (R.getBegin().isInvalid()) | ||||||||||
10524 | R.setBegin(After.getBegin()); | ||||||||||
10525 | R.setEnd(After.getEnd()); | ||||||||||
10526 | } | ||||||||||
10527 | |||||||||||
10528 | /// CheckConversionDeclarator - Called by ActOnDeclarator to check the | ||||||||||
10529 | /// well-formednes of the conversion function declarator @p D with | ||||||||||
10530 | /// type @p R. If there are any errors in the declarator, this routine | ||||||||||
10531 | /// will emit diagnostics and return true. Otherwise, it will return | ||||||||||
10532 | /// false. Either way, the type @p R will be updated to reflect a | ||||||||||
10533 | /// well-formed type for the conversion operator. | ||||||||||
10534 | void Sema::CheckConversionDeclarator(Declarator &D, QualType &R, | ||||||||||
10535 | StorageClass& SC) { | ||||||||||
10536 | // C++ [class.conv.fct]p1: | ||||||||||
10537 | // Neither parameter types nor return type can be specified. The | ||||||||||
10538 | // type of a conversion function (8.3.5) is "function taking no | ||||||||||
10539 | // parameter returning conversion-type-id." | ||||||||||
10540 | if (SC == SC_Static) { | ||||||||||
10541 | if (!D.isInvalidType()) | ||||||||||
10542 | Diag(D.getIdentifierLoc(), diag::err_conv_function_not_member) | ||||||||||
10543 | << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||||||||
10544 | << D.getName().getSourceRange(); | ||||||||||
10545 | D.setInvalidType(); | ||||||||||
10546 | SC = SC_None; | ||||||||||
10547 | } | ||||||||||
10548 | |||||||||||
10549 | TypeSourceInfo *ConvTSI = nullptr; | ||||||||||
10550 | QualType ConvType = | ||||||||||
10551 | GetTypeFromParser(D.getName().ConversionFunctionId, &ConvTSI); | ||||||||||
10552 | |||||||||||
10553 | const DeclSpec &DS = D.getDeclSpec(); | ||||||||||
10554 | if (DS.hasTypeSpecifier() && !D.isInvalidType()) { | ||||||||||
10555 | // Conversion functions don't have return types, but the parser will | ||||||||||
10556 | // happily parse something like: | ||||||||||
10557 | // | ||||||||||
10558 | // class X { | ||||||||||
10559 | // float operator bool(); | ||||||||||
10560 | // }; | ||||||||||
10561 | // | ||||||||||
10562 | // The return type will be changed later anyway. | ||||||||||
10563 | Diag(D.getIdentifierLoc(), diag::err_conv_function_return_type) | ||||||||||
10564 | << SourceRange(DS.getTypeSpecTypeLoc()) | ||||||||||
10565 | << SourceRange(D.getIdentifierLoc()); | ||||||||||
10566 | D.setInvalidType(); | ||||||||||
10567 | } else if (DS.getTypeQualifiers() && !D.isInvalidType()) { | ||||||||||
10568 | // It's also plausible that the user writes type qualifiers in the wrong | ||||||||||
10569 | // place, such as: | ||||||||||
10570 | // struct S { const operator int(); }; | ||||||||||
10571 | // FIXME: we could provide a fixit to move the qualifiers onto the | ||||||||||
10572 | // conversion type. | ||||||||||
10573 | Diag(D.getIdentifierLoc(), diag::err_conv_function_with_complex_decl) | ||||||||||
10574 | << SourceRange(D.getIdentifierLoc()) << 0; | ||||||||||
10575 | D.setInvalidType(); | ||||||||||
10576 | } | ||||||||||
10577 | |||||||||||
10578 | const auto *Proto = R->castAs<FunctionProtoType>(); | ||||||||||
10579 | |||||||||||
10580 | // Make sure we don't have any parameters. | ||||||||||
10581 | if (Proto->getNumParams() > 0) { | ||||||||||
10582 | Diag(D.getIdentifierLoc(), diag::err_conv_function_with_params); | ||||||||||
10583 | |||||||||||
10584 | // Delete the parameters. | ||||||||||
10585 | D.getFunctionTypeInfo().freeParams(); | ||||||||||
10586 | D.setInvalidType(); | ||||||||||
10587 | } else if (Proto->isVariadic()) { | ||||||||||
10588 | Diag(D.getIdentifierLoc(), diag::err_conv_function_variadic); | ||||||||||
10589 | D.setInvalidType(); | ||||||||||
10590 | } | ||||||||||
10591 | |||||||||||
10592 | // Diagnose "&operator bool()" and other such nonsense. This | ||||||||||
10593 | // is actually a gcc extension which we don't support. | ||||||||||
10594 | if (Proto->getReturnType() != ConvType) { | ||||||||||
10595 | bool NeedsTypedef = false; | ||||||||||
10596 | SourceRange Before, After; | ||||||||||
10597 | |||||||||||
10598 | // Walk the chunks and extract information on them for our diagnostic. | ||||||||||
10599 | bool PastFunctionChunk = false; | ||||||||||
10600 | for (auto &Chunk : D.type_objects()) { | ||||||||||
10601 | switch (Chunk.Kind) { | ||||||||||
10602 | case DeclaratorChunk::Function: | ||||||||||
10603 | if (!PastFunctionChunk) { | ||||||||||
10604 | if (Chunk.Fun.HasTrailingReturnType) { | ||||||||||
10605 | TypeSourceInfo *TRT = nullptr; | ||||||||||
10606 | GetTypeFromParser(Chunk.Fun.getTrailingReturnType(), &TRT); | ||||||||||
10607 | if (TRT) extendRight(After, TRT->getTypeLoc().getSourceRange()); | ||||||||||
10608 | } | ||||||||||
10609 | PastFunctionChunk = true; | ||||||||||
10610 | break; | ||||||||||
10611 | } | ||||||||||
10612 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||||||
10613 | case DeclaratorChunk::Array: | ||||||||||
10614 | NeedsTypedef = true; | ||||||||||
10615 | extendRight(After, Chunk.getSourceRange()); | ||||||||||
10616 | break; | ||||||||||
10617 | |||||||||||
10618 | case DeclaratorChunk::Pointer: | ||||||||||
10619 | case DeclaratorChunk::BlockPointer: | ||||||||||
10620 | case DeclaratorChunk::Reference: | ||||||||||
10621 | case DeclaratorChunk::MemberPointer: | ||||||||||
10622 | case DeclaratorChunk::Pipe: | ||||||||||
10623 | extendLeft(Before, Chunk.getSourceRange()); | ||||||||||
10624 | break; | ||||||||||
10625 | |||||||||||
10626 | case DeclaratorChunk::Paren: | ||||||||||
10627 | extendLeft(Before, Chunk.Loc); | ||||||||||
10628 | extendRight(After, Chunk.EndLoc); | ||||||||||
10629 | break; | ||||||||||
10630 | } | ||||||||||
10631 | } | ||||||||||
10632 | |||||||||||
10633 | SourceLocation Loc = Before.isValid() ? Before.getBegin() : | ||||||||||
10634 | After.isValid() ? After.getBegin() : | ||||||||||
10635 | D.getIdentifierLoc(); | ||||||||||
10636 | auto &&DB = Diag(Loc, diag::err_conv_function_with_complex_decl); | ||||||||||
10637 | DB << Before << After; | ||||||||||
10638 | |||||||||||
10639 | if (!NeedsTypedef) { | ||||||||||
10640 | DB << /*don't need a typedef*/0; | ||||||||||
10641 | |||||||||||
10642 | // If we can provide a correct fix-it hint, do so. | ||||||||||
10643 | if (After.isInvalid() && ConvTSI) { | ||||||||||
10644 | SourceLocation InsertLoc = | ||||||||||
10645 | getLocForEndOfToken(ConvTSI->getTypeLoc().getEndLoc()); | ||||||||||
10646 | DB << FixItHint::CreateInsertion(InsertLoc, " ") | ||||||||||
10647 | << FixItHint::CreateInsertionFromRange( | ||||||||||
10648 | InsertLoc, CharSourceRange::getTokenRange(Before)) | ||||||||||
10649 | << FixItHint::CreateRemoval(Before); | ||||||||||
10650 | } | ||||||||||
10651 | } else if (!Proto->getReturnType()->isDependentType()) { | ||||||||||
10652 | DB << /*typedef*/1 << Proto->getReturnType(); | ||||||||||
10653 | } else if (getLangOpts().CPlusPlus11) { | ||||||||||
10654 | DB << /*alias template*/2 << Proto->getReturnType(); | ||||||||||
10655 | } else { | ||||||||||
10656 | DB << /*might not be fixable*/3; | ||||||||||
10657 | } | ||||||||||
10658 | |||||||||||
10659 | // Recover by incorporating the other type chunks into the result type. | ||||||||||
10660 | // Note, this does *not* change the name of the function. This is compatible | ||||||||||
10661 | // with the GCC extension: | ||||||||||
10662 | // struct S { &operator int(); } s; | ||||||||||
10663 | // int &r = s.operator int(); // ok in GCC | ||||||||||
10664 | // S::operator int&() {} // error in GCC, function name is 'operator int'. | ||||||||||
10665 | ConvType = Proto->getReturnType(); | ||||||||||
10666 | } | ||||||||||
10667 | |||||||||||
10668 | // C++ [class.conv.fct]p4: | ||||||||||
10669 | // The conversion-type-id shall not represent a function type nor | ||||||||||
10670 | // an array type. | ||||||||||
10671 | if (ConvType->isArrayType()) { | ||||||||||
10672 | Diag(D.getIdentifierLoc(), diag::err_conv_function_to_array); | ||||||||||
10673 | ConvType = Context.getPointerType(ConvType); | ||||||||||
10674 | D.setInvalidType(); | ||||||||||
10675 | } else if (ConvType->isFunctionType()) { | ||||||||||
10676 | Diag(D.getIdentifierLoc(), diag::err_conv_function_to_function); | ||||||||||
10677 | ConvType = Context.getPointerType(ConvType); | ||||||||||
10678 | D.setInvalidType(); | ||||||||||
10679 | } | ||||||||||
10680 | |||||||||||
10681 | // Rebuild the function type "R" without any parameters (in case any | ||||||||||
10682 | // of the errors above fired) and with the conversion type as the | ||||||||||
10683 | // return type. | ||||||||||
10684 | if (D.isInvalidType()) | ||||||||||
10685 | R = Context.getFunctionType(ConvType, None, Proto->getExtProtoInfo()); | ||||||||||
10686 | |||||||||||
10687 | // C++0x explicit conversion operators. | ||||||||||
10688 | if (DS.hasExplicitSpecifier() && !getLangOpts().CPlusPlus20) | ||||||||||
10689 | Diag(DS.getExplicitSpecLoc(), | ||||||||||
10690 | getLangOpts().CPlusPlus11 | ||||||||||
10691 | ? diag::warn_cxx98_compat_explicit_conversion_functions | ||||||||||
10692 | : diag::ext_explicit_conversion_functions) | ||||||||||
10693 | << SourceRange(DS.getExplicitSpecRange()); | ||||||||||
10694 | } | ||||||||||
10695 | |||||||||||
10696 | /// ActOnConversionDeclarator - Called by ActOnDeclarator to complete | ||||||||||
10697 | /// the declaration of the given C++ conversion function. This routine | ||||||||||
10698 | /// is responsible for recording the conversion function in the C++ | ||||||||||
10699 | /// class, if possible. | ||||||||||
10700 | Decl *Sema::ActOnConversionDeclarator(CXXConversionDecl *Conversion) { | ||||||||||
10701 | assert(Conversion && "Expected to receive a conversion function declaration")(static_cast <bool> (Conversion && "Expected to receive a conversion function declaration" ) ? void (0) : __assert_fail ("Conversion && \"Expected to receive a conversion function declaration\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 10701, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
10702 | |||||||||||
10703 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(Conversion->getDeclContext()); | ||||||||||
10704 | |||||||||||
10705 | // Make sure we aren't redeclaring the conversion function. | ||||||||||
10706 | QualType ConvType = Context.getCanonicalType(Conversion->getConversionType()); | ||||||||||
10707 | // C++ [class.conv.fct]p1: | ||||||||||
10708 | // [...] A conversion function is never used to convert a | ||||||||||
10709 | // (possibly cv-qualified) object to the (possibly cv-qualified) | ||||||||||
10710 | // same object type (or a reference to it), to a (possibly | ||||||||||
10711 | // cv-qualified) base class of that type (or a reference to it), | ||||||||||
10712 | // or to (possibly cv-qualified) void. | ||||||||||
10713 | QualType ClassType | ||||||||||
10714 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||||||||
10715 | if (const ReferenceType *ConvTypeRef = ConvType->getAs<ReferenceType>()) | ||||||||||
10716 | ConvType = ConvTypeRef->getPointeeType(); | ||||||||||
10717 | if (Conversion->getTemplateSpecializationKind() != TSK_Undeclared && | ||||||||||
10718 | Conversion->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) | ||||||||||
10719 | /* Suppress diagnostics for instantiations. */; | ||||||||||
10720 | else if (Conversion->size_overridden_methods() != 0) | ||||||||||
10721 | /* Suppress diagnostics for overriding virtual function in a base class. */; | ||||||||||
10722 | else if (ConvType->isRecordType()) { | ||||||||||
10723 | ConvType = Context.getCanonicalType(ConvType).getUnqualifiedType(); | ||||||||||
10724 | if (ConvType == ClassType) | ||||||||||
10725 | Diag(Conversion->getLocation(), diag::warn_conv_to_self_not_used) | ||||||||||
10726 | << ClassType; | ||||||||||
10727 | else if (IsDerivedFrom(Conversion->getLocation(), ClassType, ConvType)) | ||||||||||
10728 | Diag(Conversion->getLocation(), diag::warn_conv_to_base_not_used) | ||||||||||
10729 | << ClassType << ConvType; | ||||||||||
10730 | } else if (ConvType->isVoidType()) { | ||||||||||
10731 | Diag(Conversion->getLocation(), diag::warn_conv_to_void_not_used) | ||||||||||
10732 | << ClassType << ConvType; | ||||||||||
10733 | } | ||||||||||
10734 | |||||||||||
10735 | if (FunctionTemplateDecl *ConversionTemplate | ||||||||||
10736 | = Conversion->getDescribedFunctionTemplate()) | ||||||||||
10737 | return ConversionTemplate; | ||||||||||
10738 | |||||||||||
10739 | return Conversion; | ||||||||||
10740 | } | ||||||||||
10741 | |||||||||||
10742 | namespace { | ||||||||||
10743 | /// Utility class to accumulate and print a diagnostic listing the invalid | ||||||||||
10744 | /// specifier(s) on a declaration. | ||||||||||
10745 | struct BadSpecifierDiagnoser { | ||||||||||
10746 | BadSpecifierDiagnoser(Sema &S, SourceLocation Loc, unsigned DiagID) | ||||||||||
10747 | : S(S), Diagnostic(S.Diag(Loc, DiagID)) {} | ||||||||||
10748 | ~BadSpecifierDiagnoser() { | ||||||||||
10749 | Diagnostic << Specifiers; | ||||||||||
10750 | } | ||||||||||
10751 | |||||||||||
10752 | template<typename T> void check(SourceLocation SpecLoc, T Spec) { | ||||||||||
10753 | return check(SpecLoc, DeclSpec::getSpecifierName(Spec)); | ||||||||||
10754 | } | ||||||||||
10755 | void check(SourceLocation SpecLoc, DeclSpec::TST Spec) { | ||||||||||
10756 | return check(SpecLoc, | ||||||||||
10757 | DeclSpec::getSpecifierName(Spec, S.getPrintingPolicy())); | ||||||||||
10758 | } | ||||||||||
10759 | void check(SourceLocation SpecLoc, const char *Spec) { | ||||||||||
10760 | if (SpecLoc.isInvalid()) return; | ||||||||||
10761 | Diagnostic << SourceRange(SpecLoc, SpecLoc); | ||||||||||
10762 | if (!Specifiers.empty()) Specifiers += " "; | ||||||||||
10763 | Specifiers += Spec; | ||||||||||
10764 | } | ||||||||||
10765 | |||||||||||
10766 | Sema &S; | ||||||||||
10767 | Sema::SemaDiagnosticBuilder Diagnostic; | ||||||||||
10768 | std::string Specifiers; | ||||||||||
10769 | }; | ||||||||||
10770 | } | ||||||||||
10771 | |||||||||||
10772 | /// Check the validity of a declarator that we parsed for a deduction-guide. | ||||||||||
10773 | /// These aren't actually declarators in the grammar, so we need to check that | ||||||||||
10774 | /// the user didn't specify any pieces that are not part of the deduction-guide | ||||||||||
10775 | /// grammar. | ||||||||||
10776 | void Sema::CheckDeductionGuideDeclarator(Declarator &D, QualType &R, | ||||||||||
10777 | StorageClass &SC) { | ||||||||||
10778 | TemplateName GuidedTemplate = D.getName().TemplateName.get().get(); | ||||||||||
10779 | TemplateDecl *GuidedTemplateDecl = GuidedTemplate.getAsTemplateDecl(); | ||||||||||
10780 | assert(GuidedTemplateDecl && "missing template decl for deduction guide")(static_cast <bool> (GuidedTemplateDecl && "missing template decl for deduction guide" ) ? void (0) : __assert_fail ("GuidedTemplateDecl && \"missing template decl for deduction guide\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 10780, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
10781 | |||||||||||
10782 | // C++ [temp.deduct.guide]p3: | ||||||||||
10783 | // A deduction-gide shall be declared in the same scope as the | ||||||||||
10784 | // corresponding class template. | ||||||||||
10785 | if (!CurContext->getRedeclContext()->Equals( | ||||||||||
10786 | GuidedTemplateDecl->getDeclContext()->getRedeclContext())) { | ||||||||||
10787 | Diag(D.getIdentifierLoc(), diag::err_deduction_guide_wrong_scope) | ||||||||||
10788 | << GuidedTemplateDecl; | ||||||||||
10789 | Diag(GuidedTemplateDecl->getLocation(), diag::note_template_decl_here); | ||||||||||
10790 | } | ||||||||||
10791 | |||||||||||
10792 | auto &DS = D.getMutableDeclSpec(); | ||||||||||
10793 | // We leave 'friend' and 'virtual' to be rejected in the normal way. | ||||||||||
10794 | if (DS.hasTypeSpecifier() || DS.getTypeQualifiers() || | ||||||||||
10795 | DS.getStorageClassSpecLoc().isValid() || DS.isInlineSpecified() || | ||||||||||
10796 | DS.isNoreturnSpecified() || DS.hasConstexprSpecifier()) { | ||||||||||
10797 | BadSpecifierDiagnoser Diagnoser( | ||||||||||
10798 | *this, D.getIdentifierLoc(), | ||||||||||
10799 | diag::err_deduction_guide_invalid_specifier); | ||||||||||
10800 | |||||||||||
10801 | Diagnoser.check(DS.getStorageClassSpecLoc(), DS.getStorageClassSpec()); | ||||||||||
10802 | DS.ClearStorageClassSpecs(); | ||||||||||
10803 | SC = SC_None; | ||||||||||
10804 | |||||||||||
10805 | // 'explicit' is permitted. | ||||||||||
10806 | Diagnoser.check(DS.getInlineSpecLoc(), "inline"); | ||||||||||
10807 | Diagnoser.check(DS.getNoreturnSpecLoc(), "_Noreturn"); | ||||||||||
10808 | Diagnoser.check(DS.getConstexprSpecLoc(), "constexpr"); | ||||||||||
10809 | DS.ClearConstexprSpec(); | ||||||||||
10810 | |||||||||||
10811 | Diagnoser.check(DS.getConstSpecLoc(), "const"); | ||||||||||
10812 | Diagnoser.check(DS.getRestrictSpecLoc(), "__restrict"); | ||||||||||
10813 | Diagnoser.check(DS.getVolatileSpecLoc(), "volatile"); | ||||||||||
10814 | Diagnoser.check(DS.getAtomicSpecLoc(), "_Atomic"); | ||||||||||
10815 | Diagnoser.check(DS.getUnalignedSpecLoc(), "__unaligned"); | ||||||||||
10816 | DS.ClearTypeQualifiers(); | ||||||||||
10817 | |||||||||||
10818 | Diagnoser.check(DS.getTypeSpecComplexLoc(), DS.getTypeSpecComplex()); | ||||||||||
10819 | Diagnoser.check(DS.getTypeSpecSignLoc(), DS.getTypeSpecSign()); | ||||||||||
10820 | Diagnoser.check(DS.getTypeSpecWidthLoc(), DS.getTypeSpecWidth()); | ||||||||||
10821 | Diagnoser.check(DS.getTypeSpecTypeLoc(), DS.getTypeSpecType()); | ||||||||||
10822 | DS.ClearTypeSpecType(); | ||||||||||
10823 | } | ||||||||||
10824 | |||||||||||
10825 | if (D.isInvalidType()) | ||||||||||
10826 | return; | ||||||||||
10827 | |||||||||||
10828 | // Check the declarator is simple enough. | ||||||||||
10829 | bool FoundFunction = false; | ||||||||||
10830 | for (const DeclaratorChunk &Chunk : llvm::reverse(D.type_objects())) { | ||||||||||
10831 | if (Chunk.Kind == DeclaratorChunk::Paren) | ||||||||||
10832 | continue; | ||||||||||
10833 | if (Chunk.Kind != DeclaratorChunk::Function || FoundFunction) { | ||||||||||
10834 | Diag(D.getDeclSpec().getBeginLoc(), | ||||||||||
10835 | diag::err_deduction_guide_with_complex_decl) | ||||||||||
10836 | << D.getSourceRange(); | ||||||||||
10837 | break; | ||||||||||
10838 | } | ||||||||||
10839 | if (!Chunk.Fun.hasTrailingReturnType()) { | ||||||||||
10840 | Diag(D.getName().getBeginLoc(), | ||||||||||
10841 | diag::err_deduction_guide_no_trailing_return_type); | ||||||||||
10842 | break; | ||||||||||
10843 | } | ||||||||||
10844 | |||||||||||
10845 | // Check that the return type is written as a specialization of | ||||||||||
10846 | // the template specified as the deduction-guide's name. | ||||||||||
10847 | ParsedType TrailingReturnType = Chunk.Fun.getTrailingReturnType(); | ||||||||||
10848 | TypeSourceInfo *TSI = nullptr; | ||||||||||
10849 | QualType RetTy = GetTypeFromParser(TrailingReturnType, &TSI); | ||||||||||
10850 | assert(TSI && "deduction guide has valid type but invalid return type?")(static_cast <bool> (TSI && "deduction guide has valid type but invalid return type?" ) ? void (0) : __assert_fail ("TSI && \"deduction guide has valid type but invalid return type?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 10850, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
10851 | bool AcceptableReturnType = false; | ||||||||||
10852 | bool MightInstantiateToSpecialization = false; | ||||||||||
10853 | if (auto RetTST = | ||||||||||
10854 | TSI->getTypeLoc().getAs<TemplateSpecializationTypeLoc>()) { | ||||||||||
10855 | TemplateName SpecifiedName = RetTST.getTypePtr()->getTemplateName(); | ||||||||||
10856 | bool TemplateMatches = | ||||||||||
10857 | Context.hasSameTemplateName(SpecifiedName, GuidedTemplate); | ||||||||||
10858 | if (SpecifiedName.getKind() == TemplateName::Template && TemplateMatches) | ||||||||||
10859 | AcceptableReturnType = true; | ||||||||||
10860 | else { | ||||||||||
10861 | // This could still instantiate to the right type, unless we know it | ||||||||||
10862 | // names the wrong class template. | ||||||||||
10863 | auto *TD = SpecifiedName.getAsTemplateDecl(); | ||||||||||
10864 | MightInstantiateToSpecialization = !(TD && isa<ClassTemplateDecl>(TD) && | ||||||||||
10865 | !TemplateMatches); | ||||||||||
10866 | } | ||||||||||
10867 | } else if (!RetTy.hasQualifiers() && RetTy->isDependentType()) { | ||||||||||
10868 | MightInstantiateToSpecialization = true; | ||||||||||
10869 | } | ||||||||||
10870 | |||||||||||
10871 | if (!AcceptableReturnType) { | ||||||||||
10872 | Diag(TSI->getTypeLoc().getBeginLoc(), | ||||||||||
10873 | diag::err_deduction_guide_bad_trailing_return_type) | ||||||||||
10874 | << GuidedTemplate << TSI->getType() | ||||||||||
10875 | << MightInstantiateToSpecialization | ||||||||||
10876 | << TSI->getTypeLoc().getSourceRange(); | ||||||||||
10877 | } | ||||||||||
10878 | |||||||||||
10879 | // Keep going to check that we don't have any inner declarator pieces (we | ||||||||||
10880 | // could still have a function returning a pointer to a function). | ||||||||||
10881 | FoundFunction = true; | ||||||||||
10882 | } | ||||||||||
10883 | |||||||||||
10884 | if (D.isFunctionDefinition()) | ||||||||||
10885 | Diag(D.getIdentifierLoc(), diag::err_deduction_guide_defines_function); | ||||||||||
10886 | } | ||||||||||
10887 | |||||||||||
10888 | //===----------------------------------------------------------------------===// | ||||||||||
10889 | // Namespace Handling | ||||||||||
10890 | //===----------------------------------------------------------------------===// | ||||||||||
10891 | |||||||||||
10892 | /// Diagnose a mismatch in 'inline' qualifiers when a namespace is | ||||||||||
10893 | /// reopened. | ||||||||||
10894 | static void DiagnoseNamespaceInlineMismatch(Sema &S, SourceLocation KeywordLoc, | ||||||||||
10895 | SourceLocation Loc, | ||||||||||
10896 | IdentifierInfo *II, bool *IsInline, | ||||||||||
10897 | NamespaceDecl *PrevNS) { | ||||||||||
10898 | assert(*IsInline != PrevNS->isInline())(static_cast <bool> (*IsInline != PrevNS->isInline() ) ? void (0) : __assert_fail ("*IsInline != PrevNS->isInline()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 10898, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
10899 | |||||||||||
10900 | if (PrevNS->isInline()) | ||||||||||
10901 | // The user probably just forgot the 'inline', so suggest that it | ||||||||||
10902 | // be added back. | ||||||||||
10903 | S.Diag(Loc, diag::warn_inline_namespace_reopened_noninline) | ||||||||||
10904 | << FixItHint::CreateInsertion(KeywordLoc, "inline "); | ||||||||||
10905 | else | ||||||||||
10906 | S.Diag(Loc, diag::err_inline_namespace_mismatch); | ||||||||||
10907 | |||||||||||
10908 | S.Diag(PrevNS->getLocation(), diag::note_previous_definition); | ||||||||||
10909 | *IsInline = PrevNS->isInline(); | ||||||||||
10910 | } | ||||||||||
10911 | |||||||||||
10912 | /// ActOnStartNamespaceDef - This is called at the start of a namespace | ||||||||||
10913 | /// definition. | ||||||||||
10914 | Decl *Sema::ActOnStartNamespaceDef( | ||||||||||
10915 | Scope *NamespcScope, SourceLocation InlineLoc, SourceLocation NamespaceLoc, | ||||||||||
10916 | SourceLocation IdentLoc, IdentifierInfo *II, SourceLocation LBrace, | ||||||||||
10917 | const ParsedAttributesView &AttrList, UsingDirectiveDecl *&UD) { | ||||||||||
10918 | SourceLocation StartLoc = InlineLoc.isValid() ? InlineLoc : NamespaceLoc; | ||||||||||
10919 | // For anonymous namespace, take the location of the left brace. | ||||||||||
10920 | SourceLocation Loc = II ? IdentLoc : LBrace; | ||||||||||
10921 | bool IsInline = InlineLoc.isValid(); | ||||||||||
10922 | bool IsInvalid = false; | ||||||||||
10923 | bool IsStd = false; | ||||||||||
10924 | bool AddToKnown = false; | ||||||||||
10925 | Scope *DeclRegionScope = NamespcScope->getParent(); | ||||||||||
10926 | |||||||||||
10927 | NamespaceDecl *PrevNS = nullptr; | ||||||||||
10928 | if (II) { | ||||||||||
10929 | // C++ [namespace.def]p2: | ||||||||||
10930 | // The identifier in an original-namespace-definition shall not | ||||||||||
10931 | // have been previously defined in the declarative region in | ||||||||||
10932 | // which the original-namespace-definition appears. The | ||||||||||
10933 | // identifier in an original-namespace-definition is the name of | ||||||||||
10934 | // the namespace. Subsequently in that declarative region, it is | ||||||||||
10935 | // treated as an original-namespace-name. | ||||||||||
10936 | // | ||||||||||
10937 | // Since namespace names are unique in their scope, and we don't | ||||||||||
10938 | // look through using directives, just look for any ordinary names | ||||||||||
10939 | // as if by qualified name lookup. | ||||||||||
10940 | LookupResult R(*this, II, IdentLoc, LookupOrdinaryName, | ||||||||||
10941 | ForExternalRedeclaration); | ||||||||||
10942 | LookupQualifiedName(R, CurContext->getRedeclContext()); | ||||||||||
10943 | NamedDecl *PrevDecl = | ||||||||||
10944 | R.isSingleResult() ? R.getRepresentativeDecl() : nullptr; | ||||||||||
10945 | PrevNS = dyn_cast_or_null<NamespaceDecl>(PrevDecl); | ||||||||||
10946 | |||||||||||
10947 | if (PrevNS) { | ||||||||||
10948 | // This is an extended namespace definition. | ||||||||||
10949 | if (IsInline != PrevNS->isInline()) | ||||||||||
10950 | DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, Loc, II, | ||||||||||
10951 | &IsInline, PrevNS); | ||||||||||
10952 | } else if (PrevDecl) { | ||||||||||
10953 | // This is an invalid name redefinition. | ||||||||||
10954 | Diag(Loc, diag::err_redefinition_different_kind) | ||||||||||
10955 | << II; | ||||||||||
10956 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||||||||
10957 | IsInvalid = true; | ||||||||||
10958 | // Continue on to push Namespc as current DeclContext and return it. | ||||||||||
10959 | } else if (II->isStr("std") && | ||||||||||
10960 | CurContext->getRedeclContext()->isTranslationUnit()) { | ||||||||||
10961 | // This is the first "real" definition of the namespace "std", so update | ||||||||||
10962 | // our cache of the "std" namespace to point at this definition. | ||||||||||
10963 | PrevNS = getStdNamespace(); | ||||||||||
10964 | IsStd = true; | ||||||||||
10965 | AddToKnown = !IsInline; | ||||||||||
10966 | } else { | ||||||||||
10967 | // We've seen this namespace for the first time. | ||||||||||
10968 | AddToKnown = !IsInline; | ||||||||||
10969 | } | ||||||||||
10970 | } else { | ||||||||||
10971 | // Anonymous namespaces. | ||||||||||
10972 | |||||||||||
10973 | // Determine whether the parent already has an anonymous namespace. | ||||||||||
10974 | DeclContext *Parent = CurContext->getRedeclContext(); | ||||||||||
10975 | if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(Parent)) { | ||||||||||
10976 | PrevNS = TU->getAnonymousNamespace(); | ||||||||||
10977 | } else { | ||||||||||
10978 | NamespaceDecl *ND = cast<NamespaceDecl>(Parent); | ||||||||||
10979 | PrevNS = ND->getAnonymousNamespace(); | ||||||||||
10980 | } | ||||||||||
10981 | |||||||||||
10982 | if (PrevNS && IsInline != PrevNS->isInline()) | ||||||||||
10983 | DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, NamespaceLoc, II, | ||||||||||
10984 | &IsInline, PrevNS); | ||||||||||
10985 | } | ||||||||||
10986 | |||||||||||
10987 | NamespaceDecl *Namespc = NamespaceDecl::Create(Context, CurContext, IsInline, | ||||||||||
10988 | StartLoc, Loc, II, PrevNS); | ||||||||||
10989 | if (IsInvalid) | ||||||||||
10990 | Namespc->setInvalidDecl(); | ||||||||||
10991 | |||||||||||
10992 | ProcessDeclAttributeList(DeclRegionScope, Namespc, AttrList); | ||||||||||
10993 | AddPragmaAttributes(DeclRegionScope, Namespc); | ||||||||||
10994 | |||||||||||
10995 | // FIXME: Should we be merging attributes? | ||||||||||
10996 | if (const VisibilityAttr *Attr = Namespc->getAttr<VisibilityAttr>()) | ||||||||||
10997 | PushNamespaceVisibilityAttr(Attr, Loc); | ||||||||||
10998 | |||||||||||
10999 | if (IsStd) | ||||||||||
11000 | StdNamespace = Namespc; | ||||||||||
11001 | if (AddToKnown) | ||||||||||
11002 | KnownNamespaces[Namespc] = false; | ||||||||||
11003 | |||||||||||
11004 | if (II) { | ||||||||||
11005 | PushOnScopeChains(Namespc, DeclRegionScope); | ||||||||||
11006 | } else { | ||||||||||
11007 | // Link the anonymous namespace into its parent. | ||||||||||
11008 | DeclContext *Parent = CurContext->getRedeclContext(); | ||||||||||
11009 | if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(Parent)) { | ||||||||||
11010 | TU->setAnonymousNamespace(Namespc); | ||||||||||
11011 | } else { | ||||||||||
11012 | cast<NamespaceDecl>(Parent)->setAnonymousNamespace(Namespc); | ||||||||||
11013 | } | ||||||||||
11014 | |||||||||||
11015 | CurContext->addDecl(Namespc); | ||||||||||
11016 | |||||||||||
11017 | // C++ [namespace.unnamed]p1. An unnamed-namespace-definition | ||||||||||
11018 | // behaves as if it were replaced by | ||||||||||
11019 | // namespace unique { /* empty body */ } | ||||||||||
11020 | // using namespace unique; | ||||||||||
11021 | // namespace unique { namespace-body } | ||||||||||
11022 | // where all occurrences of 'unique' in a translation unit are | ||||||||||
11023 | // replaced by the same identifier and this identifier differs | ||||||||||
11024 | // from all other identifiers in the entire program. | ||||||||||
11025 | |||||||||||
11026 | // We just create the namespace with an empty name and then add an | ||||||||||
11027 | // implicit using declaration, just like the standard suggests. | ||||||||||
11028 | // | ||||||||||
11029 | // CodeGen enforces the "universally unique" aspect by giving all | ||||||||||
11030 | // declarations semantically contained within an anonymous | ||||||||||
11031 | // namespace internal linkage. | ||||||||||
11032 | |||||||||||
11033 | if (!PrevNS) { | ||||||||||
11034 | UD = UsingDirectiveDecl::Create(Context, Parent, | ||||||||||
11035 | /* 'using' */ LBrace, | ||||||||||
11036 | /* 'namespace' */ SourceLocation(), | ||||||||||
11037 | /* qualifier */ NestedNameSpecifierLoc(), | ||||||||||
11038 | /* identifier */ SourceLocation(), | ||||||||||
11039 | Namespc, | ||||||||||
11040 | /* Ancestor */ Parent); | ||||||||||
11041 | UD->setImplicit(); | ||||||||||
11042 | Parent->addDecl(UD); | ||||||||||
11043 | } | ||||||||||
11044 | } | ||||||||||
11045 | |||||||||||
11046 | ActOnDocumentableDecl(Namespc); | ||||||||||
11047 | |||||||||||
11048 | // Although we could have an invalid decl (i.e. the namespace name is a | ||||||||||
11049 | // redefinition), push it as current DeclContext and try to continue parsing. | ||||||||||
11050 | // FIXME: We should be able to push Namespc here, so that the each DeclContext | ||||||||||
11051 | // for the namespace has the declarations that showed up in that particular | ||||||||||
11052 | // namespace definition. | ||||||||||
11053 | PushDeclContext(NamespcScope, Namespc); | ||||||||||
11054 | return Namespc; | ||||||||||
11055 | } | ||||||||||
11056 | |||||||||||
11057 | /// getNamespaceDecl - Returns the namespace a decl represents. If the decl | ||||||||||
11058 | /// is a namespace alias, returns the namespace it points to. | ||||||||||
11059 | static inline NamespaceDecl *getNamespaceDecl(NamedDecl *D) { | ||||||||||
11060 | if (NamespaceAliasDecl *AD = dyn_cast_or_null<NamespaceAliasDecl>(D)) | ||||||||||
11061 | return AD->getNamespace(); | ||||||||||
11062 | return dyn_cast_or_null<NamespaceDecl>(D); | ||||||||||
11063 | } | ||||||||||
11064 | |||||||||||
11065 | /// ActOnFinishNamespaceDef - This callback is called after a namespace is | ||||||||||
11066 | /// exited. Decl is the DeclTy returned by ActOnStartNamespaceDef. | ||||||||||
11067 | void Sema::ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace) { | ||||||||||
11068 | NamespaceDecl *Namespc = dyn_cast_or_null<NamespaceDecl>(Dcl); | ||||||||||
11069 | assert(Namespc && "Invalid parameter, expected NamespaceDecl")(static_cast <bool> (Namespc && "Invalid parameter, expected NamespaceDecl" ) ? void (0) : __assert_fail ("Namespc && \"Invalid parameter, expected NamespaceDecl\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11069, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11070 | Namespc->setRBraceLoc(RBrace); | ||||||||||
11071 | PopDeclContext(); | ||||||||||
11072 | if (Namespc->hasAttr<VisibilityAttr>()) | ||||||||||
11073 | PopPragmaVisibility(true, RBrace); | ||||||||||
11074 | // If this namespace contains an export-declaration, export it now. | ||||||||||
11075 | if (DeferredExportedNamespaces.erase(Namespc)) | ||||||||||
11076 | Dcl->setModuleOwnershipKind(Decl::ModuleOwnershipKind::VisibleWhenImported); | ||||||||||
11077 | } | ||||||||||
11078 | |||||||||||
11079 | CXXRecordDecl *Sema::getStdBadAlloc() const { | ||||||||||
11080 | return cast_or_null<CXXRecordDecl>( | ||||||||||
11081 | StdBadAlloc.get(Context.getExternalSource())); | ||||||||||
11082 | } | ||||||||||
11083 | |||||||||||
11084 | EnumDecl *Sema::getStdAlignValT() const { | ||||||||||
11085 | return cast_or_null<EnumDecl>(StdAlignValT.get(Context.getExternalSource())); | ||||||||||
11086 | } | ||||||||||
11087 | |||||||||||
11088 | NamespaceDecl *Sema::getStdNamespace() const { | ||||||||||
11089 | return cast_or_null<NamespaceDecl>( | ||||||||||
11090 | StdNamespace.get(Context.getExternalSource())); | ||||||||||
11091 | } | ||||||||||
11092 | |||||||||||
11093 | NamespaceDecl *Sema::lookupStdExperimentalNamespace() { | ||||||||||
11094 | if (!StdExperimentalNamespaceCache) { | ||||||||||
11095 | if (auto Std = getStdNamespace()) { | ||||||||||
11096 | LookupResult Result(*this, &PP.getIdentifierTable().get("experimental"), | ||||||||||
11097 | SourceLocation(), LookupNamespaceName); | ||||||||||
11098 | if (!LookupQualifiedName(Result, Std) || | ||||||||||
11099 | !(StdExperimentalNamespaceCache = | ||||||||||
11100 | Result.getAsSingle<NamespaceDecl>())) | ||||||||||
11101 | Result.suppressDiagnostics(); | ||||||||||
11102 | } | ||||||||||
11103 | } | ||||||||||
11104 | return StdExperimentalNamespaceCache; | ||||||||||
11105 | } | ||||||||||
11106 | |||||||||||
11107 | namespace { | ||||||||||
11108 | |||||||||||
11109 | enum UnsupportedSTLSelect { | ||||||||||
11110 | USS_InvalidMember, | ||||||||||
11111 | USS_MissingMember, | ||||||||||
11112 | USS_NonTrivial, | ||||||||||
11113 | USS_Other | ||||||||||
11114 | }; | ||||||||||
11115 | |||||||||||
11116 | struct InvalidSTLDiagnoser { | ||||||||||
11117 | Sema &S; | ||||||||||
11118 | SourceLocation Loc; | ||||||||||
11119 | QualType TyForDiags; | ||||||||||
11120 | |||||||||||
11121 | QualType operator()(UnsupportedSTLSelect Sel = USS_Other, StringRef Name = "", | ||||||||||
11122 | const VarDecl *VD = nullptr) { | ||||||||||
11123 | { | ||||||||||
11124 | auto D = S.Diag(Loc, diag::err_std_compare_type_not_supported) | ||||||||||
11125 | << TyForDiags << ((int)Sel); | ||||||||||
11126 | if (Sel == USS_InvalidMember || Sel == USS_MissingMember) { | ||||||||||
11127 | assert(!Name.empty())(static_cast <bool> (!Name.empty()) ? void (0) : __assert_fail ("!Name.empty()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11127, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11128 | D << Name; | ||||||||||
11129 | } | ||||||||||
11130 | } | ||||||||||
11131 | if (Sel == USS_InvalidMember) { | ||||||||||
11132 | S.Diag(VD->getLocation(), diag::note_var_declared_here) | ||||||||||
11133 | << VD << VD->getSourceRange(); | ||||||||||
11134 | } | ||||||||||
11135 | return QualType(); | ||||||||||
11136 | } | ||||||||||
11137 | }; | ||||||||||
11138 | } // namespace | ||||||||||
11139 | |||||||||||
11140 | QualType Sema::CheckComparisonCategoryType(ComparisonCategoryType Kind, | ||||||||||
11141 | SourceLocation Loc, | ||||||||||
11142 | ComparisonCategoryUsage Usage) { | ||||||||||
11143 | assert(getLangOpts().CPlusPlus &&(static_cast <bool> (getLangOpts().CPlusPlus && "Looking for comparison category type outside of C++.") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Looking for comparison category type outside of C++.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11144, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
11144 | "Looking for comparison category type outside of C++.")(static_cast <bool> (getLangOpts().CPlusPlus && "Looking for comparison category type outside of C++.") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Looking for comparison category type outside of C++.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11144, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11145 | |||||||||||
11146 | // Use an elaborated type for diagnostics which has a name containing the | ||||||||||
11147 | // prepended 'std' namespace but not any inline namespace names. | ||||||||||
11148 | auto TyForDiags = [&](ComparisonCategoryInfo *Info) { | ||||||||||
11149 | auto *NNS = | ||||||||||
11150 | NestedNameSpecifier::Create(Context, nullptr, getStdNamespace()); | ||||||||||
11151 | return Context.getElaboratedType(ETK_None, NNS, Info->getType()); | ||||||||||
11152 | }; | ||||||||||
11153 | |||||||||||
11154 | // Check if we've already successfully checked the comparison category type | ||||||||||
11155 | // before. If so, skip checking it again. | ||||||||||
11156 | ComparisonCategoryInfo *Info = Context.CompCategories.lookupInfo(Kind); | ||||||||||
11157 | if (Info && FullyCheckedComparisonCategories[static_cast<unsigned>(Kind)]) { | ||||||||||
11158 | // The only thing we need to check is that the type has a reachable | ||||||||||
11159 | // definition in the current context. | ||||||||||
11160 | if (RequireCompleteType(Loc, TyForDiags(Info), diag::err_incomplete_type)) | ||||||||||
11161 | return QualType(); | ||||||||||
11162 | |||||||||||
11163 | return Info->getType(); | ||||||||||
11164 | } | ||||||||||
11165 | |||||||||||
11166 | // If lookup failed | ||||||||||
11167 | if (!Info) { | ||||||||||
11168 | std::string NameForDiags = "std::"; | ||||||||||
11169 | NameForDiags += ComparisonCategories::getCategoryString(Kind); | ||||||||||
11170 | Diag(Loc, diag::err_implied_comparison_category_type_not_found) | ||||||||||
11171 | << NameForDiags << (int)Usage; | ||||||||||
11172 | return QualType(); | ||||||||||
11173 | } | ||||||||||
11174 | |||||||||||
11175 | assert(Info->Kind == Kind)(static_cast <bool> (Info->Kind == Kind) ? void (0) : __assert_fail ("Info->Kind == Kind", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11175, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11176 | assert(Info->Record)(static_cast <bool> (Info->Record) ? void (0) : __assert_fail ("Info->Record", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11176, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11177 | |||||||||||
11178 | // Update the Record decl in case we encountered a forward declaration on our | ||||||||||
11179 | // first pass. FIXME: This is a bit of a hack. | ||||||||||
11180 | if (Info->Record->hasDefinition()) | ||||||||||
11181 | Info->Record = Info->Record->getDefinition(); | ||||||||||
11182 | |||||||||||
11183 | if (RequireCompleteType(Loc, TyForDiags(Info), diag::err_incomplete_type)) | ||||||||||
11184 | return QualType(); | ||||||||||
11185 | |||||||||||
11186 | InvalidSTLDiagnoser UnsupportedSTLError{*this, Loc, TyForDiags(Info)}; | ||||||||||
11187 | |||||||||||
11188 | if (!Info->Record->isTriviallyCopyable()) | ||||||||||
11189 | return UnsupportedSTLError(USS_NonTrivial); | ||||||||||
11190 | |||||||||||
11191 | for (const CXXBaseSpecifier &BaseSpec : Info->Record->bases()) { | ||||||||||
11192 | CXXRecordDecl *Base = BaseSpec.getType()->getAsCXXRecordDecl(); | ||||||||||
11193 | // Tolerate empty base classes. | ||||||||||
11194 | if (Base->isEmpty()) | ||||||||||
11195 | continue; | ||||||||||
11196 | // Reject STL implementations which have at least one non-empty base. | ||||||||||
11197 | return UnsupportedSTLError(); | ||||||||||
11198 | } | ||||||||||
11199 | |||||||||||
11200 | // Check that the STL has implemented the types using a single integer field. | ||||||||||
11201 | // This expectation allows better codegen for builtin operators. We require: | ||||||||||
11202 | // (1) The class has exactly one field. | ||||||||||
11203 | // (2) The field is an integral or enumeration type. | ||||||||||
11204 | auto FIt = Info->Record->field_begin(), FEnd = Info->Record->field_end(); | ||||||||||
11205 | if (std::distance(FIt, FEnd) != 1 || | ||||||||||
11206 | !FIt->getType()->isIntegralOrEnumerationType()) { | ||||||||||
11207 | return UnsupportedSTLError(); | ||||||||||
11208 | } | ||||||||||
11209 | |||||||||||
11210 | // Build each of the require values and store them in Info. | ||||||||||
11211 | for (ComparisonCategoryResult CCR : | ||||||||||
11212 | ComparisonCategories::getPossibleResultsForType(Kind)) { | ||||||||||
11213 | StringRef MemName = ComparisonCategories::getResultString(CCR); | ||||||||||
11214 | ComparisonCategoryInfo::ValueInfo *ValInfo = Info->lookupValueInfo(CCR); | ||||||||||
11215 | |||||||||||
11216 | if (!ValInfo) | ||||||||||
11217 | return UnsupportedSTLError(USS_MissingMember, MemName); | ||||||||||
11218 | |||||||||||
11219 | VarDecl *VD = ValInfo->VD; | ||||||||||
11220 | assert(VD && "should not be null!")(static_cast <bool> (VD && "should not be null!" ) ? void (0) : __assert_fail ("VD && \"should not be null!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11220, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11221 | |||||||||||
11222 | // Attempt to diagnose reasons why the STL definition of this type | ||||||||||
11223 | // might be foobar, including it failing to be a constant expression. | ||||||||||
11224 | // TODO Handle more ways the lookup or result can be invalid. | ||||||||||
11225 | if (!VD->isStaticDataMember() || | ||||||||||
11226 | !VD->isUsableInConstantExpressions(Context)) | ||||||||||
11227 | return UnsupportedSTLError(USS_InvalidMember, MemName, VD); | ||||||||||
11228 | |||||||||||
11229 | // Attempt to evaluate the var decl as a constant expression and extract | ||||||||||
11230 | // the value of its first field as a ICE. If this fails, the STL | ||||||||||
11231 | // implementation is not supported. | ||||||||||
11232 | if (!ValInfo->hasValidIntValue()) | ||||||||||
11233 | return UnsupportedSTLError(); | ||||||||||
11234 | |||||||||||
11235 | MarkVariableReferenced(Loc, VD); | ||||||||||
11236 | } | ||||||||||
11237 | |||||||||||
11238 | // We've successfully built the required types and expressions. Update | ||||||||||
11239 | // the cache and return the newly cached value. | ||||||||||
11240 | FullyCheckedComparisonCategories[static_cast<unsigned>(Kind)] = true; | ||||||||||
11241 | return Info->getType(); | ||||||||||
11242 | } | ||||||||||
11243 | |||||||||||
11244 | /// Retrieve the special "std" namespace, which may require us to | ||||||||||
11245 | /// implicitly define the namespace. | ||||||||||
11246 | NamespaceDecl *Sema::getOrCreateStdNamespace() { | ||||||||||
11247 | if (!StdNamespace) { | ||||||||||
11248 | // The "std" namespace has not yet been defined, so build one implicitly. | ||||||||||
11249 | StdNamespace = NamespaceDecl::Create(Context, | ||||||||||
11250 | Context.getTranslationUnitDecl(), | ||||||||||
11251 | /*Inline=*/false, | ||||||||||
11252 | SourceLocation(), SourceLocation(), | ||||||||||
11253 | &PP.getIdentifierTable().get("std"), | ||||||||||
11254 | /*PrevDecl=*/nullptr); | ||||||||||
11255 | getStdNamespace()->setImplicit(true); | ||||||||||
11256 | } | ||||||||||
11257 | |||||||||||
11258 | return getStdNamespace(); | ||||||||||
11259 | } | ||||||||||
11260 | |||||||||||
11261 | bool Sema::isStdInitializerList(QualType Ty, QualType *Element) { | ||||||||||
11262 | assert(getLangOpts().CPlusPlus &&(static_cast <bool> (getLangOpts().CPlusPlus && "Looking for std::initializer_list outside of C++.") ? void ( 0) : __assert_fail ("getLangOpts().CPlusPlus && \"Looking for std::initializer_list outside of C++.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11263, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
11263 | "Looking for std::initializer_list outside of C++.")(static_cast <bool> (getLangOpts().CPlusPlus && "Looking for std::initializer_list outside of C++.") ? void ( 0) : __assert_fail ("getLangOpts().CPlusPlus && \"Looking for std::initializer_list outside of C++.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11263, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11264 | |||||||||||
11265 | // We're looking for implicit instantiations of | ||||||||||
11266 | // template <typename E> class std::initializer_list. | ||||||||||
11267 | |||||||||||
11268 | if (!StdNamespace) // If we haven't seen namespace std yet, this can't be it. | ||||||||||
11269 | return false; | ||||||||||
11270 | |||||||||||
11271 | ClassTemplateDecl *Template = nullptr; | ||||||||||
11272 | const TemplateArgument *Arguments = nullptr; | ||||||||||
11273 | |||||||||||
11274 | if (const RecordType *RT = Ty->getAs<RecordType>()) { | ||||||||||
11275 | |||||||||||
11276 | ClassTemplateSpecializationDecl *Specialization = | ||||||||||
11277 | dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl()); | ||||||||||
11278 | if (!Specialization) | ||||||||||
11279 | return false; | ||||||||||
11280 | |||||||||||
11281 | Template = Specialization->getSpecializedTemplate(); | ||||||||||
11282 | Arguments = Specialization->getTemplateArgs().data(); | ||||||||||
11283 | } else if (const TemplateSpecializationType *TST = | ||||||||||
11284 | Ty->getAs<TemplateSpecializationType>()) { | ||||||||||
11285 | Template = dyn_cast_or_null<ClassTemplateDecl>( | ||||||||||
11286 | TST->getTemplateName().getAsTemplateDecl()); | ||||||||||
11287 | Arguments = TST->getArgs(); | ||||||||||
11288 | } | ||||||||||
11289 | if (!Template) | ||||||||||
11290 | return false; | ||||||||||
11291 | |||||||||||
11292 | if (!StdInitializerList) { | ||||||||||
11293 | // Haven't recognized std::initializer_list yet, maybe this is it. | ||||||||||
11294 | CXXRecordDecl *TemplateClass = Template->getTemplatedDecl(); | ||||||||||
11295 | if (TemplateClass->getIdentifier() != | ||||||||||
11296 | &PP.getIdentifierTable().get("initializer_list") || | ||||||||||
11297 | !getStdNamespace()->InEnclosingNamespaceSetOf( | ||||||||||
11298 | TemplateClass->getDeclContext())) | ||||||||||
11299 | return false; | ||||||||||
11300 | // This is a template called std::initializer_list, but is it the right | ||||||||||
11301 | // template? | ||||||||||
11302 | TemplateParameterList *Params = Template->getTemplateParameters(); | ||||||||||
11303 | if (Params->getMinRequiredArguments() != 1) | ||||||||||
11304 | return false; | ||||||||||
11305 | if (!isa<TemplateTypeParmDecl>(Params->getParam(0))) | ||||||||||
11306 | return false; | ||||||||||
11307 | |||||||||||
11308 | // It's the right template. | ||||||||||
11309 | StdInitializerList = Template; | ||||||||||
11310 | } | ||||||||||
11311 | |||||||||||
11312 | if (Template->getCanonicalDecl() != StdInitializerList->getCanonicalDecl()) | ||||||||||
11313 | return false; | ||||||||||
11314 | |||||||||||
11315 | // This is an instance of std::initializer_list. Find the argument type. | ||||||||||
11316 | if (Element) | ||||||||||
11317 | *Element = Arguments[0].getAsType(); | ||||||||||
11318 | return true; | ||||||||||
11319 | } | ||||||||||
11320 | |||||||||||
11321 | static ClassTemplateDecl *LookupStdInitializerList(Sema &S, SourceLocation Loc){ | ||||||||||
11322 | NamespaceDecl *Std = S.getStdNamespace(); | ||||||||||
11323 | if (!Std) { | ||||||||||
11324 | S.Diag(Loc, diag::err_implied_std_initializer_list_not_found); | ||||||||||
11325 | return nullptr; | ||||||||||
11326 | } | ||||||||||
11327 | |||||||||||
11328 | LookupResult Result(S, &S.PP.getIdentifierTable().get("initializer_list"), | ||||||||||
11329 | Loc, Sema::LookupOrdinaryName); | ||||||||||
11330 | if (!S.LookupQualifiedName(Result, Std)) { | ||||||||||
11331 | S.Diag(Loc, diag::err_implied_std_initializer_list_not_found); | ||||||||||
11332 | return nullptr; | ||||||||||
11333 | } | ||||||||||
11334 | ClassTemplateDecl *Template = Result.getAsSingle<ClassTemplateDecl>(); | ||||||||||
11335 | if (!Template) { | ||||||||||
11336 | Result.suppressDiagnostics(); | ||||||||||
11337 | // We found something weird. Complain about the first thing we found. | ||||||||||
11338 | NamedDecl *Found = *Result.begin(); | ||||||||||
11339 | S.Diag(Found->getLocation(), diag::err_malformed_std_initializer_list); | ||||||||||
11340 | return nullptr; | ||||||||||
11341 | } | ||||||||||
11342 | |||||||||||
11343 | // We found some template called std::initializer_list. Now verify that it's | ||||||||||
11344 | // correct. | ||||||||||
11345 | TemplateParameterList *Params = Template->getTemplateParameters(); | ||||||||||
11346 | if (Params->getMinRequiredArguments() != 1 || | ||||||||||
11347 | !isa<TemplateTypeParmDecl>(Params->getParam(0))) { | ||||||||||
11348 | S.Diag(Template->getLocation(), diag::err_malformed_std_initializer_list); | ||||||||||
11349 | return nullptr; | ||||||||||
11350 | } | ||||||||||
11351 | |||||||||||
11352 | return Template; | ||||||||||
11353 | } | ||||||||||
11354 | |||||||||||
11355 | QualType Sema::BuildStdInitializerList(QualType Element, SourceLocation Loc) { | ||||||||||
11356 | if (!StdInitializerList) { | ||||||||||
11357 | StdInitializerList = LookupStdInitializerList(*this, Loc); | ||||||||||
11358 | if (!StdInitializerList) | ||||||||||
11359 | return QualType(); | ||||||||||
11360 | } | ||||||||||
11361 | |||||||||||
11362 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||||||
11363 | Args.addArgument(TemplateArgumentLoc(TemplateArgument(Element), | ||||||||||
11364 | Context.getTrivialTypeSourceInfo(Element, | ||||||||||
11365 | Loc))); | ||||||||||
11366 | return Context.getCanonicalType( | ||||||||||
11367 | CheckTemplateIdType(TemplateName(StdInitializerList), Loc, Args)); | ||||||||||
11368 | } | ||||||||||
11369 | |||||||||||
11370 | bool Sema::isInitListConstructor(const FunctionDecl *Ctor) { | ||||||||||
11371 | // C++ [dcl.init.list]p2: | ||||||||||
11372 | // A constructor is an initializer-list constructor if its first parameter | ||||||||||
11373 | // is of type std::initializer_list<E> or reference to possibly cv-qualified | ||||||||||
11374 | // std::initializer_list<E> for some type E, and either there are no other | ||||||||||
11375 | // parameters or else all other parameters have default arguments. | ||||||||||
11376 | if (!Ctor->hasOneParamOrDefaultArgs()) | ||||||||||
11377 | return false; | ||||||||||
11378 | |||||||||||
11379 | QualType ArgType = Ctor->getParamDecl(0)->getType(); | ||||||||||
11380 | if (const ReferenceType *RT = ArgType->getAs<ReferenceType>()) | ||||||||||
11381 | ArgType = RT->getPointeeType().getUnqualifiedType(); | ||||||||||
11382 | |||||||||||
11383 | return isStdInitializerList(ArgType, nullptr); | ||||||||||
11384 | } | ||||||||||
11385 | |||||||||||
11386 | /// Determine whether a using statement is in a context where it will be | ||||||||||
11387 | /// apply in all contexts. | ||||||||||
11388 | static bool IsUsingDirectiveInToplevelContext(DeclContext *CurContext) { | ||||||||||
11389 | switch (CurContext->getDeclKind()) { | ||||||||||
11390 | case Decl::TranslationUnit: | ||||||||||
11391 | return true; | ||||||||||
11392 | case Decl::LinkageSpec: | ||||||||||
11393 | return IsUsingDirectiveInToplevelContext(CurContext->getParent()); | ||||||||||
11394 | default: | ||||||||||
11395 | return false; | ||||||||||
11396 | } | ||||||||||
11397 | } | ||||||||||
11398 | |||||||||||
11399 | namespace { | ||||||||||
11400 | |||||||||||
11401 | // Callback to only accept typo corrections that are namespaces. | ||||||||||
11402 | class NamespaceValidatorCCC final : public CorrectionCandidateCallback { | ||||||||||
11403 | public: | ||||||||||
11404 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||||||
11405 | if (NamedDecl *ND = candidate.getCorrectionDecl()) | ||||||||||
11406 | return isa<NamespaceDecl>(ND) || isa<NamespaceAliasDecl>(ND); | ||||||||||
11407 | return false; | ||||||||||
11408 | } | ||||||||||
11409 | |||||||||||
11410 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||||||
11411 | return std::make_unique<NamespaceValidatorCCC>(*this); | ||||||||||
11412 | } | ||||||||||
11413 | }; | ||||||||||
11414 | |||||||||||
11415 | } | ||||||||||
11416 | |||||||||||
11417 | static bool TryNamespaceTypoCorrection(Sema &S, LookupResult &R, Scope *Sc, | ||||||||||
11418 | CXXScopeSpec &SS, | ||||||||||
11419 | SourceLocation IdentLoc, | ||||||||||
11420 | IdentifierInfo *Ident) { | ||||||||||
11421 | R.clear(); | ||||||||||
11422 | NamespaceValidatorCCC CCC{}; | ||||||||||
11423 | if (TypoCorrection Corrected = | ||||||||||
11424 | S.CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), Sc, &SS, CCC, | ||||||||||
11425 | Sema::CTK_ErrorRecovery)) { | ||||||||||
11426 | if (DeclContext *DC = S.computeDeclContext(SS, false)) { | ||||||||||
11427 | std::string CorrectedStr(Corrected.getAsString(S.getLangOpts())); | ||||||||||
11428 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||||||||
11429 | Ident->getName().equals(CorrectedStr); | ||||||||||
11430 | S.diagnoseTypo(Corrected, | ||||||||||
11431 | S.PDiag(diag::err_using_directive_member_suggest) | ||||||||||
11432 | << Ident << DC << DroppedSpecifier << SS.getRange(), | ||||||||||
11433 | S.PDiag(diag::note_namespace_defined_here)); | ||||||||||
11434 | } else { | ||||||||||
11435 | S.diagnoseTypo(Corrected, | ||||||||||
11436 | S.PDiag(diag::err_using_directive_suggest) << Ident, | ||||||||||
11437 | S.PDiag(diag::note_namespace_defined_here)); | ||||||||||
11438 | } | ||||||||||
11439 | R.addDecl(Corrected.getFoundDecl()); | ||||||||||
11440 | return true; | ||||||||||
11441 | } | ||||||||||
11442 | return false; | ||||||||||
11443 | } | ||||||||||
11444 | |||||||||||
11445 | Decl *Sema::ActOnUsingDirective(Scope *S, SourceLocation UsingLoc, | ||||||||||
11446 | SourceLocation NamespcLoc, CXXScopeSpec &SS, | ||||||||||
11447 | SourceLocation IdentLoc, | ||||||||||
11448 | IdentifierInfo *NamespcName, | ||||||||||
11449 | const ParsedAttributesView &AttrList) { | ||||||||||
11450 | assert(!SS.isInvalid() && "Invalid CXXScopeSpec.")(static_cast <bool> (!SS.isInvalid() && "Invalid CXXScopeSpec." ) ? void (0) : __assert_fail ("!SS.isInvalid() && \"Invalid CXXScopeSpec.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11450, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11451 | assert(NamespcName && "Invalid NamespcName.")(static_cast <bool> (NamespcName && "Invalid NamespcName." ) ? void (0) : __assert_fail ("NamespcName && \"Invalid NamespcName.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11451, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11452 | assert(IdentLoc.isValid() && "Invalid NamespceName location.")(static_cast <bool> (IdentLoc.isValid() && "Invalid NamespceName location." ) ? void (0) : __assert_fail ("IdentLoc.isValid() && \"Invalid NamespceName location.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11452, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11453 | |||||||||||
11454 | // This can only happen along a recovery path. | ||||||||||
11455 | while (S->isTemplateParamScope()) | ||||||||||
11456 | S = S->getParent(); | ||||||||||
11457 | assert(S->getFlags() & Scope::DeclScope && "Invalid Scope.")(static_cast <bool> (S->getFlags() & Scope::DeclScope && "Invalid Scope.") ? void (0) : __assert_fail ("S->getFlags() & Scope::DeclScope && \"Invalid Scope.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11457, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11458 | |||||||||||
11459 | UsingDirectiveDecl *UDir = nullptr; | ||||||||||
11460 | NestedNameSpecifier *Qualifier = nullptr; | ||||||||||
11461 | if (SS.isSet()) | ||||||||||
11462 | Qualifier = SS.getScopeRep(); | ||||||||||
11463 | |||||||||||
11464 | // Lookup namespace name. | ||||||||||
11465 | LookupResult R(*this, NamespcName, IdentLoc, LookupNamespaceName); | ||||||||||
11466 | LookupParsedName(R, S, &SS); | ||||||||||
11467 | if (R.isAmbiguous()) | ||||||||||
11468 | return nullptr; | ||||||||||
11469 | |||||||||||
11470 | if (R.empty()) { | ||||||||||
11471 | R.clear(); | ||||||||||
11472 | // Allow "using namespace std;" or "using namespace ::std;" even if | ||||||||||
11473 | // "std" hasn't been defined yet, for GCC compatibility. | ||||||||||
11474 | if ((!Qualifier || Qualifier->getKind() == NestedNameSpecifier::Global) && | ||||||||||
11475 | NamespcName->isStr("std")) { | ||||||||||
11476 | Diag(IdentLoc, diag::ext_using_undefined_std); | ||||||||||
11477 | R.addDecl(getOrCreateStdNamespace()); | ||||||||||
11478 | R.resolveKind(); | ||||||||||
11479 | } | ||||||||||
11480 | // Otherwise, attempt typo correction. | ||||||||||
11481 | else TryNamespaceTypoCorrection(*this, R, S, SS, IdentLoc, NamespcName); | ||||||||||
11482 | } | ||||||||||
11483 | |||||||||||
11484 | if (!R.empty()) { | ||||||||||
11485 | NamedDecl *Named = R.getRepresentativeDecl(); | ||||||||||
11486 | NamespaceDecl *NS = R.getAsSingle<NamespaceDecl>(); | ||||||||||
11487 | assert(NS && "expected namespace decl")(static_cast <bool> (NS && "expected namespace decl" ) ? void (0) : __assert_fail ("NS && \"expected namespace decl\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11487, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11488 | |||||||||||
11489 | // The use of a nested name specifier may trigger deprecation warnings. | ||||||||||
11490 | DiagnoseUseOfDecl(Named, IdentLoc); | ||||||||||
11491 | |||||||||||
11492 | // C++ [namespace.udir]p1: | ||||||||||
11493 | // A using-directive specifies that the names in the nominated | ||||||||||
11494 | // namespace can be used in the scope in which the | ||||||||||
11495 | // using-directive appears after the using-directive. During | ||||||||||
11496 | // unqualified name lookup (3.4.1), the names appear as if they | ||||||||||
11497 | // were declared in the nearest enclosing namespace which | ||||||||||
11498 | // contains both the using-directive and the nominated | ||||||||||
11499 | // namespace. [Note: in this context, "contains" means "contains | ||||||||||
11500 | // directly or indirectly". ] | ||||||||||
11501 | |||||||||||
11502 | // Find enclosing context containing both using-directive and | ||||||||||
11503 | // nominated namespace. | ||||||||||
11504 | DeclContext *CommonAncestor = NS; | ||||||||||
11505 | while (CommonAncestor && !CommonAncestor->Encloses(CurContext)) | ||||||||||
11506 | CommonAncestor = CommonAncestor->getParent(); | ||||||||||
11507 | |||||||||||
11508 | UDir = UsingDirectiveDecl::Create(Context, CurContext, UsingLoc, NamespcLoc, | ||||||||||
11509 | SS.getWithLocInContext(Context), | ||||||||||
11510 | IdentLoc, Named, CommonAncestor); | ||||||||||
11511 | |||||||||||
11512 | if (IsUsingDirectiveInToplevelContext(CurContext) && | ||||||||||
11513 | !SourceMgr.isInMainFile(SourceMgr.getExpansionLoc(IdentLoc))) { | ||||||||||
11514 | Diag(IdentLoc, diag::warn_using_directive_in_header); | ||||||||||
11515 | } | ||||||||||
11516 | |||||||||||
11517 | PushUsingDirective(S, UDir); | ||||||||||
11518 | } else { | ||||||||||
11519 | Diag(IdentLoc, diag::err_expected_namespace_name) << SS.getRange(); | ||||||||||
11520 | } | ||||||||||
11521 | |||||||||||
11522 | if (UDir) | ||||||||||
11523 | ProcessDeclAttributeList(S, UDir, AttrList); | ||||||||||
11524 | |||||||||||
11525 | return UDir; | ||||||||||
11526 | } | ||||||||||
11527 | |||||||||||
11528 | void Sema::PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir) { | ||||||||||
11529 | // If the scope has an associated entity and the using directive is at | ||||||||||
11530 | // namespace or translation unit scope, add the UsingDirectiveDecl into | ||||||||||
11531 | // its lookup structure so qualified name lookup can find it. | ||||||||||
11532 | DeclContext *Ctx = S->getEntity(); | ||||||||||
11533 | if (Ctx && !Ctx->isFunctionOrMethod()) | ||||||||||
11534 | Ctx->addDecl(UDir); | ||||||||||
11535 | else | ||||||||||
11536 | // Otherwise, it is at block scope. The using-directives will affect lookup | ||||||||||
11537 | // only to the end of the scope. | ||||||||||
11538 | S->PushUsingDirective(UDir); | ||||||||||
11539 | } | ||||||||||
11540 | |||||||||||
11541 | Decl *Sema::ActOnUsingDeclaration(Scope *S, AccessSpecifier AS, | ||||||||||
11542 | SourceLocation UsingLoc, | ||||||||||
11543 | SourceLocation TypenameLoc, CXXScopeSpec &SS, | ||||||||||
11544 | UnqualifiedId &Name, | ||||||||||
11545 | SourceLocation EllipsisLoc, | ||||||||||
11546 | const ParsedAttributesView &AttrList) { | ||||||||||
11547 | assert(S->getFlags() & Scope::DeclScope && "Invalid Scope.")(static_cast <bool> (S->getFlags() & Scope::DeclScope && "Invalid Scope.") ? void (0) : __assert_fail ("S->getFlags() & Scope::DeclScope && \"Invalid Scope.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11547, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11548 | |||||||||||
11549 | if (SS.isEmpty()) { | ||||||||||
11550 | Diag(Name.getBeginLoc(), diag::err_using_requires_qualname); | ||||||||||
11551 | return nullptr; | ||||||||||
11552 | } | ||||||||||
11553 | |||||||||||
11554 | switch (Name.getKind()) { | ||||||||||
11555 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||||||
11556 | case UnqualifiedIdKind::IK_Identifier: | ||||||||||
11557 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||||||
11558 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||||||
11559 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||||||||
11560 | break; | ||||||||||
11561 | |||||||||||
11562 | case UnqualifiedIdKind::IK_ConstructorName: | ||||||||||
11563 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||||||||
11564 | // C++11 inheriting constructors. | ||||||||||
11565 | Diag(Name.getBeginLoc(), | ||||||||||
11566 | getLangOpts().CPlusPlus11 | ||||||||||
11567 | ? diag::warn_cxx98_compat_using_decl_constructor | ||||||||||
11568 | : diag::err_using_decl_constructor) | ||||||||||
11569 | << SS.getRange(); | ||||||||||
11570 | |||||||||||
11571 | if (getLangOpts().CPlusPlus11) break; | ||||||||||
11572 | |||||||||||
11573 | return nullptr; | ||||||||||
11574 | |||||||||||
11575 | case UnqualifiedIdKind::IK_DestructorName: | ||||||||||
11576 | Diag(Name.getBeginLoc(), diag::err_using_decl_destructor) << SS.getRange(); | ||||||||||
11577 | return nullptr; | ||||||||||
11578 | |||||||||||
11579 | case UnqualifiedIdKind::IK_TemplateId: | ||||||||||
11580 | Diag(Name.getBeginLoc(), diag::err_using_decl_template_id) | ||||||||||
11581 | << SourceRange(Name.TemplateId->LAngleLoc, Name.TemplateId->RAngleLoc); | ||||||||||
11582 | return nullptr; | ||||||||||
11583 | |||||||||||
11584 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||||||||
11585 | llvm_unreachable("cannot parse qualified deduction guide name")::llvm::llvm_unreachable_internal("cannot parse qualified deduction guide name" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11585); | ||||||||||
11586 | } | ||||||||||
11587 | |||||||||||
11588 | DeclarationNameInfo TargetNameInfo = GetNameFromUnqualifiedId(Name); | ||||||||||
11589 | DeclarationName TargetName = TargetNameInfo.getName(); | ||||||||||
11590 | if (!TargetName) | ||||||||||
11591 | return nullptr; | ||||||||||
11592 | |||||||||||
11593 | // Warn about access declarations. | ||||||||||
11594 | if (UsingLoc.isInvalid()) { | ||||||||||
11595 | Diag(Name.getBeginLoc(), getLangOpts().CPlusPlus11 | ||||||||||
11596 | ? diag::err_access_decl | ||||||||||
11597 | : diag::warn_access_decl_deprecated) | ||||||||||
11598 | << FixItHint::CreateInsertion(SS.getRange().getBegin(), "using "); | ||||||||||
11599 | } | ||||||||||
11600 | |||||||||||
11601 | if (EllipsisLoc.isInvalid()) { | ||||||||||
11602 | if (DiagnoseUnexpandedParameterPack(SS, UPPC_UsingDeclaration) || | ||||||||||
11603 | DiagnoseUnexpandedParameterPack(TargetNameInfo, UPPC_UsingDeclaration)) | ||||||||||
11604 | return nullptr; | ||||||||||
11605 | } else { | ||||||||||
11606 | if (!SS.getScopeRep()->containsUnexpandedParameterPack() && | ||||||||||
11607 | !TargetNameInfo.containsUnexpandedParameterPack()) { | ||||||||||
11608 | Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | ||||||||||
11609 | << SourceRange(SS.getBeginLoc(), TargetNameInfo.getEndLoc()); | ||||||||||
11610 | EllipsisLoc = SourceLocation(); | ||||||||||
11611 | } | ||||||||||
11612 | } | ||||||||||
11613 | |||||||||||
11614 | NamedDecl *UD = | ||||||||||
11615 | BuildUsingDeclaration(S, AS, UsingLoc, TypenameLoc.isValid(), TypenameLoc, | ||||||||||
11616 | SS, TargetNameInfo, EllipsisLoc, AttrList, | ||||||||||
11617 | /*IsInstantiation*/ false, | ||||||||||
11618 | AttrList.hasAttribute(ParsedAttr::AT_UsingIfExists)); | ||||||||||
11619 | if (UD) | ||||||||||
11620 | PushOnScopeChains(UD, S, /*AddToContext*/ false); | ||||||||||
11621 | |||||||||||
11622 | return UD; | ||||||||||
11623 | } | ||||||||||
11624 | |||||||||||
11625 | Decl *Sema::ActOnUsingEnumDeclaration(Scope *S, AccessSpecifier AS, | ||||||||||
11626 | SourceLocation UsingLoc, | ||||||||||
11627 | SourceLocation EnumLoc, | ||||||||||
11628 | const DeclSpec &DS) { | ||||||||||
11629 | switch (DS.getTypeSpecType()) { | ||||||||||
11630 | case DeclSpec::TST_error: | ||||||||||
11631 | // This will already have been diagnosed | ||||||||||
11632 | return nullptr; | ||||||||||
11633 | |||||||||||
11634 | case DeclSpec::TST_enum: | ||||||||||
11635 | break; | ||||||||||
11636 | |||||||||||
11637 | case DeclSpec::TST_typename: | ||||||||||
11638 | Diag(DS.getTypeSpecTypeLoc(), diag::err_using_enum_is_dependent); | ||||||||||
11639 | return nullptr; | ||||||||||
11640 | |||||||||||
11641 | default: | ||||||||||
11642 | llvm_unreachable("unexpected DeclSpec type")::llvm::llvm_unreachable_internal("unexpected DeclSpec type", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11642); | ||||||||||
11643 | } | ||||||||||
11644 | |||||||||||
11645 | // As with enum-decls, we ignore attributes for now. | ||||||||||
11646 | auto *Enum = cast<EnumDecl>(DS.getRepAsDecl()); | ||||||||||
11647 | if (auto *Def = Enum->getDefinition()) | ||||||||||
11648 | Enum = Def; | ||||||||||
11649 | |||||||||||
11650 | auto *UD = BuildUsingEnumDeclaration(S, AS, UsingLoc, EnumLoc, | ||||||||||
11651 | DS.getTypeSpecTypeNameLoc(), Enum); | ||||||||||
11652 | if (UD) | ||||||||||
11653 | PushOnScopeChains(UD, S, /*AddToContext*/ false); | ||||||||||
11654 | |||||||||||
11655 | return UD; | ||||||||||
11656 | } | ||||||||||
11657 | |||||||||||
11658 | /// Determine whether a using declaration considers the given | ||||||||||
11659 | /// declarations as "equivalent", e.g., if they are redeclarations of | ||||||||||
11660 | /// the same entity or are both typedefs of the same type. | ||||||||||
11661 | static bool | ||||||||||
11662 | IsEquivalentForUsingDecl(ASTContext &Context, NamedDecl *D1, NamedDecl *D2) { | ||||||||||
11663 | if (D1->getCanonicalDecl() == D2->getCanonicalDecl()) | ||||||||||
11664 | return true; | ||||||||||
11665 | |||||||||||
11666 | if (TypedefNameDecl *TD1 = dyn_cast<TypedefNameDecl>(D1)) | ||||||||||
11667 | if (TypedefNameDecl *TD2 = dyn_cast<TypedefNameDecl>(D2)) | ||||||||||
11668 | return Context.hasSameType(TD1->getUnderlyingType(), | ||||||||||
11669 | TD2->getUnderlyingType()); | ||||||||||
11670 | |||||||||||
11671 | // Two using_if_exists using-declarations are equivalent if both are | ||||||||||
11672 | // unresolved. | ||||||||||
11673 | if (isa<UnresolvedUsingIfExistsDecl>(D1) && | ||||||||||
11674 | isa<UnresolvedUsingIfExistsDecl>(D2)) | ||||||||||
11675 | return true; | ||||||||||
11676 | |||||||||||
11677 | return false; | ||||||||||
11678 | } | ||||||||||
11679 | |||||||||||
11680 | |||||||||||
11681 | /// Determines whether to create a using shadow decl for a particular | ||||||||||
11682 | /// decl, given the set of decls existing prior to this using lookup. | ||||||||||
11683 | bool Sema::CheckUsingShadowDecl(BaseUsingDecl *BUD, NamedDecl *Orig, | ||||||||||
11684 | const LookupResult &Previous, | ||||||||||
11685 | UsingShadowDecl *&PrevShadow) { | ||||||||||
11686 | // Diagnose finding a decl which is not from a base class of the | ||||||||||
11687 | // current class. We do this now because there are cases where this | ||||||||||
11688 | // function will silently decide not to build a shadow decl, which | ||||||||||
11689 | // will pre-empt further diagnostics. | ||||||||||
11690 | // | ||||||||||
11691 | // We don't need to do this in C++11 because we do the check once on | ||||||||||
11692 | // the qualifier. | ||||||||||
11693 | // | ||||||||||
11694 | // FIXME: diagnose the following if we care enough: | ||||||||||
11695 | // struct A { int foo; }; | ||||||||||
11696 | // struct B : A { using A::foo; }; | ||||||||||
11697 | // template <class T> struct C : A {}; | ||||||||||
11698 | // template <class T> struct D : C<T> { using B::foo; } // <--- | ||||||||||
11699 | // This is invalid (during instantiation) in C++03 because B::foo | ||||||||||
11700 | // resolves to the using decl in B, which is not a base class of D<T>. | ||||||||||
11701 | // We can't diagnose it immediately because C<T> is an unknown | ||||||||||
11702 | // specialization. The UsingShadowDecl in D<T> then points directly | ||||||||||
11703 | // to A::foo, which will look well-formed when we instantiate. | ||||||||||
11704 | // The right solution is to not collapse the shadow-decl chain. | ||||||||||
11705 | if (!getLangOpts().CPlusPlus11 && CurContext->isRecord()) | ||||||||||
11706 | if (auto *Using = dyn_cast<UsingDecl>(BUD)) { | ||||||||||
11707 | DeclContext *OrigDC = Orig->getDeclContext(); | ||||||||||
11708 | |||||||||||
11709 | // Handle enums and anonymous structs. | ||||||||||
11710 | if (isa<EnumDecl>(OrigDC)) | ||||||||||
11711 | OrigDC = OrigDC->getParent(); | ||||||||||
11712 | CXXRecordDecl *OrigRec = cast<CXXRecordDecl>(OrigDC); | ||||||||||
11713 | while (OrigRec->isAnonymousStructOrUnion()) | ||||||||||
11714 | OrigRec = cast<CXXRecordDecl>(OrigRec->getDeclContext()); | ||||||||||
11715 | |||||||||||
11716 | if (cast<CXXRecordDecl>(CurContext)->isProvablyNotDerivedFrom(OrigRec)) { | ||||||||||
11717 | if (OrigDC == CurContext) { | ||||||||||
11718 | Diag(Using->getLocation(), | ||||||||||
11719 | diag::err_using_decl_nested_name_specifier_is_current_class) | ||||||||||
11720 | << Using->getQualifierLoc().getSourceRange(); | ||||||||||
11721 | Diag(Orig->getLocation(), diag::note_using_decl_target); | ||||||||||
11722 | Using->setInvalidDecl(); | ||||||||||
11723 | return true; | ||||||||||
11724 | } | ||||||||||
11725 | |||||||||||
11726 | Diag(Using->getQualifierLoc().getBeginLoc(), | ||||||||||
11727 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||||||||
11728 | << Using->getQualifier() << cast<CXXRecordDecl>(CurContext) | ||||||||||
11729 | << Using->getQualifierLoc().getSourceRange(); | ||||||||||
11730 | Diag(Orig->getLocation(), diag::note_using_decl_target); | ||||||||||
11731 | Using->setInvalidDecl(); | ||||||||||
11732 | return true; | ||||||||||
11733 | } | ||||||||||
11734 | } | ||||||||||
11735 | |||||||||||
11736 | if (Previous.empty()) return false; | ||||||||||
11737 | |||||||||||
11738 | NamedDecl *Target = Orig; | ||||||||||
11739 | if (isa<UsingShadowDecl>(Target)) | ||||||||||
11740 | Target = cast<UsingShadowDecl>(Target)->getTargetDecl(); | ||||||||||
11741 | |||||||||||
11742 | // If the target happens to be one of the previous declarations, we | ||||||||||
11743 | // don't have a conflict. | ||||||||||
11744 | // | ||||||||||
11745 | // FIXME: but we might be increasing its access, in which case we | ||||||||||
11746 | // should redeclare it. | ||||||||||
11747 | NamedDecl *NonTag = nullptr, *Tag = nullptr; | ||||||||||
11748 | bool FoundEquivalentDecl = false; | ||||||||||
11749 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||||||||
11750 | I != E; ++I) { | ||||||||||
11751 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||||||||
11752 | // We can have UsingDecls in our Previous results because we use the same | ||||||||||
11753 | // LookupResult for checking whether the UsingDecl itself is a valid | ||||||||||
11754 | // redeclaration. | ||||||||||
11755 | if (isa<UsingDecl>(D) || isa<UsingPackDecl>(D) || isa<UsingEnumDecl>(D)) | ||||||||||
11756 | continue; | ||||||||||
11757 | |||||||||||
11758 | if (auto *RD = dyn_cast<CXXRecordDecl>(D)) { | ||||||||||
11759 | // C++ [class.mem]p19: | ||||||||||
11760 | // If T is the name of a class, then [every named member other than | ||||||||||
11761 | // a non-static data member] shall have a name different from T | ||||||||||
11762 | if (RD->isInjectedClassName() && !isa<FieldDecl>(Target) && | ||||||||||
11763 | !isa<IndirectFieldDecl>(Target) && | ||||||||||
11764 | !isa<UnresolvedUsingValueDecl>(Target) && | ||||||||||
11765 | DiagnoseClassNameShadow( | ||||||||||
11766 | CurContext, | ||||||||||
11767 | DeclarationNameInfo(BUD->getDeclName(), BUD->getLocation()))) | ||||||||||
11768 | return true; | ||||||||||
11769 | } | ||||||||||
11770 | |||||||||||
11771 | if (IsEquivalentForUsingDecl(Context, D, Target)) { | ||||||||||
11772 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(*I)) | ||||||||||
11773 | PrevShadow = Shadow; | ||||||||||
11774 | FoundEquivalentDecl = true; | ||||||||||
11775 | } else if (isEquivalentInternalLinkageDeclaration(D, Target)) { | ||||||||||
11776 | // We don't conflict with an existing using shadow decl of an equivalent | ||||||||||
11777 | // declaration, but we're not a redeclaration of it. | ||||||||||
11778 | FoundEquivalentDecl = true; | ||||||||||
11779 | } | ||||||||||
11780 | |||||||||||
11781 | if (isVisible(D)) | ||||||||||
11782 | (isa<TagDecl>(D) ? Tag : NonTag) = D; | ||||||||||
11783 | } | ||||||||||
11784 | |||||||||||
11785 | if (FoundEquivalentDecl) | ||||||||||
11786 | return false; | ||||||||||
11787 | |||||||||||
11788 | // Always emit a diagnostic for a mismatch between an unresolved | ||||||||||
11789 | // using_if_exists and a resolved using declaration in either direction. | ||||||||||
11790 | if (isa<UnresolvedUsingIfExistsDecl>(Target) != | ||||||||||
11791 | (isa_and_nonnull<UnresolvedUsingIfExistsDecl>(NonTag))) { | ||||||||||
11792 | if (!NonTag && !Tag) | ||||||||||
11793 | return false; | ||||||||||
11794 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||||||||
11795 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||||||||
11796 | Diag((NonTag ? NonTag : Tag)->getLocation(), | ||||||||||
11797 | diag::note_using_decl_conflict); | ||||||||||
11798 | BUD->setInvalidDecl(); | ||||||||||
11799 | return true; | ||||||||||
11800 | } | ||||||||||
11801 | |||||||||||
11802 | if (FunctionDecl *FD = Target->getAsFunction()) { | ||||||||||
11803 | NamedDecl *OldDecl = nullptr; | ||||||||||
11804 | switch (CheckOverload(nullptr, FD, Previous, OldDecl, | ||||||||||
11805 | /*IsForUsingDecl*/ true)) { | ||||||||||
11806 | case Ovl_Overload: | ||||||||||
11807 | return false; | ||||||||||
11808 | |||||||||||
11809 | case Ovl_NonFunction: | ||||||||||
11810 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||||||||
11811 | break; | ||||||||||
11812 | |||||||||||
11813 | // We found a decl with the exact signature. | ||||||||||
11814 | case Ovl_Match: | ||||||||||
11815 | // If we're in a record, we want to hide the target, so we | ||||||||||
11816 | // return true (without a diagnostic) to tell the caller not to | ||||||||||
11817 | // build a shadow decl. | ||||||||||
11818 | if (CurContext->isRecord()) | ||||||||||
11819 | return true; | ||||||||||
11820 | |||||||||||
11821 | // If we're not in a record, this is an error. | ||||||||||
11822 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||||||||
11823 | break; | ||||||||||
11824 | } | ||||||||||
11825 | |||||||||||
11826 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||||||||
11827 | Diag(OldDecl->getLocation(), diag::note_using_decl_conflict); | ||||||||||
11828 | BUD->setInvalidDecl(); | ||||||||||
11829 | return true; | ||||||||||
11830 | } | ||||||||||
11831 | |||||||||||
11832 | // Target is not a function. | ||||||||||
11833 | |||||||||||
11834 | if (isa<TagDecl>(Target)) { | ||||||||||
11835 | // No conflict between a tag and a non-tag. | ||||||||||
11836 | if (!Tag) return false; | ||||||||||
11837 | |||||||||||
11838 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||||||||
11839 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||||||||
11840 | Diag(Tag->getLocation(), diag::note_using_decl_conflict); | ||||||||||
11841 | BUD->setInvalidDecl(); | ||||||||||
11842 | return true; | ||||||||||
11843 | } | ||||||||||
11844 | |||||||||||
11845 | // No conflict between a tag and a non-tag. | ||||||||||
11846 | if (!NonTag) return false; | ||||||||||
11847 | |||||||||||
11848 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||||||||
11849 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||||||||
11850 | Diag(NonTag->getLocation(), diag::note_using_decl_conflict); | ||||||||||
11851 | BUD->setInvalidDecl(); | ||||||||||
11852 | return true; | ||||||||||
11853 | } | ||||||||||
11854 | |||||||||||
11855 | /// Determine whether a direct base class is a virtual base class. | ||||||||||
11856 | static bool isVirtualDirectBase(CXXRecordDecl *Derived, CXXRecordDecl *Base) { | ||||||||||
11857 | if (!Derived->getNumVBases()) | ||||||||||
11858 | return false; | ||||||||||
11859 | for (auto &B : Derived->bases()) | ||||||||||
11860 | if (B.getType()->getAsCXXRecordDecl() == Base) | ||||||||||
11861 | return B.isVirtual(); | ||||||||||
11862 | llvm_unreachable("not a direct base class")::llvm::llvm_unreachable_internal("not a direct base class", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11862); | ||||||||||
11863 | } | ||||||||||
11864 | |||||||||||
11865 | /// Builds a shadow declaration corresponding to a 'using' declaration. | ||||||||||
11866 | UsingShadowDecl *Sema::BuildUsingShadowDecl(Scope *S, BaseUsingDecl *BUD, | ||||||||||
11867 | NamedDecl *Orig, | ||||||||||
11868 | UsingShadowDecl *PrevDecl) { | ||||||||||
11869 | // If we resolved to another shadow declaration, just coalesce them. | ||||||||||
11870 | NamedDecl *Target = Orig; | ||||||||||
11871 | if (isa<UsingShadowDecl>(Target)) { | ||||||||||
11872 | Target = cast<UsingShadowDecl>(Target)->getTargetDecl(); | ||||||||||
11873 | assert(!isa<UsingShadowDecl>(Target) && "nested shadow declaration")(static_cast <bool> (!isa<UsingShadowDecl>(Target ) && "nested shadow declaration") ? void (0) : __assert_fail ("!isa<UsingShadowDecl>(Target) && \"nested shadow declaration\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 11873, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
11874 | } | ||||||||||
11875 | |||||||||||
11876 | NamedDecl *NonTemplateTarget = Target; | ||||||||||
11877 | if (auto *TargetTD = dyn_cast<TemplateDecl>(Target)) | ||||||||||
11878 | NonTemplateTarget = TargetTD->getTemplatedDecl(); | ||||||||||
11879 | |||||||||||
11880 | UsingShadowDecl *Shadow; | ||||||||||
11881 | if (NonTemplateTarget && isa<CXXConstructorDecl>(NonTemplateTarget)) { | ||||||||||
11882 | UsingDecl *Using = cast<UsingDecl>(BUD); | ||||||||||
11883 | bool IsVirtualBase = | ||||||||||
11884 | isVirtualDirectBase(cast<CXXRecordDecl>(CurContext), | ||||||||||
11885 | Using->getQualifier()->getAsRecordDecl()); | ||||||||||
11886 | Shadow = ConstructorUsingShadowDecl::Create( | ||||||||||
11887 | Context, CurContext, Using->getLocation(), Using, Orig, IsVirtualBase); | ||||||||||
11888 | } else { | ||||||||||
11889 | Shadow = UsingShadowDecl::Create(Context, CurContext, BUD->getLocation(), | ||||||||||
11890 | Target->getDeclName(), BUD, Target); | ||||||||||
11891 | } | ||||||||||
11892 | BUD->addShadowDecl(Shadow); | ||||||||||
11893 | |||||||||||
11894 | Shadow->setAccess(BUD->getAccess()); | ||||||||||
11895 | if (Orig->isInvalidDecl() || BUD->isInvalidDecl()) | ||||||||||
11896 | Shadow->setInvalidDecl(); | ||||||||||
11897 | |||||||||||
11898 | Shadow->setPreviousDecl(PrevDecl); | ||||||||||
11899 | |||||||||||
11900 | if (S) | ||||||||||
11901 | PushOnScopeChains(Shadow, S); | ||||||||||
11902 | else | ||||||||||
11903 | CurContext->addDecl(Shadow); | ||||||||||
11904 | |||||||||||
11905 | |||||||||||
11906 | return Shadow; | ||||||||||
11907 | } | ||||||||||
11908 | |||||||||||
11909 | /// Hides a using shadow declaration. This is required by the current | ||||||||||
11910 | /// using-decl implementation when a resolvable using declaration in a | ||||||||||
11911 | /// class is followed by a declaration which would hide or override | ||||||||||
11912 | /// one or more of the using decl's targets; for example: | ||||||||||
11913 | /// | ||||||||||
11914 | /// struct Base { void foo(int); }; | ||||||||||
11915 | /// struct Derived : Base { | ||||||||||
11916 | /// using Base::foo; | ||||||||||
11917 | /// void foo(int); | ||||||||||
11918 | /// }; | ||||||||||
11919 | /// | ||||||||||
11920 | /// The governing language is C++03 [namespace.udecl]p12: | ||||||||||
11921 | /// | ||||||||||
11922 | /// When a using-declaration brings names from a base class into a | ||||||||||
11923 | /// derived class scope, member functions in the derived class | ||||||||||
11924 | /// override and/or hide member functions with the same name and | ||||||||||
11925 | /// parameter types in a base class (rather than conflicting). | ||||||||||
11926 | /// | ||||||||||
11927 | /// There are two ways to implement this: | ||||||||||
11928 | /// (1) optimistically create shadow decls when they're not hidden | ||||||||||
11929 | /// by existing declarations, or | ||||||||||
11930 | /// (2) don't create any shadow decls (or at least don't make them | ||||||||||
11931 | /// visible) until we've fully parsed/instantiated the class. | ||||||||||
11932 | /// The problem with (1) is that we might have to retroactively remove | ||||||||||
11933 | /// a shadow decl, which requires several O(n) operations because the | ||||||||||
11934 | /// decl structures are (very reasonably) not designed for removal. | ||||||||||
11935 | /// (2) avoids this but is very fiddly and phase-dependent. | ||||||||||
11936 | void Sema::HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow) { | ||||||||||
11937 | if (Shadow->getDeclName().getNameKind() == | ||||||||||
11938 | DeclarationName::CXXConversionFunctionName) | ||||||||||
11939 | cast<CXXRecordDecl>(Shadow->getDeclContext())->removeConversion(Shadow); | ||||||||||
11940 | |||||||||||
11941 | // Remove it from the DeclContext... | ||||||||||
11942 | Shadow->getDeclContext()->removeDecl(Shadow); | ||||||||||
11943 | |||||||||||
11944 | // ...and the scope, if applicable... | ||||||||||
11945 | if (S) { | ||||||||||
11946 | S->RemoveDecl(Shadow); | ||||||||||
11947 | IdResolver.RemoveDecl(Shadow); | ||||||||||
11948 | } | ||||||||||
11949 | |||||||||||
11950 | // ...and the using decl. | ||||||||||
11951 | Shadow->getIntroducer()->removeShadowDecl(Shadow); | ||||||||||
11952 | |||||||||||
11953 | // TODO: complain somehow if Shadow was used. It shouldn't | ||||||||||
11954 | // be possible for this to happen, because...? | ||||||||||
11955 | } | ||||||||||
11956 | |||||||||||
11957 | /// Find the base specifier for a base class with the given type. | ||||||||||
11958 | static CXXBaseSpecifier *findDirectBaseWithType(CXXRecordDecl *Derived, | ||||||||||
11959 | QualType DesiredBase, | ||||||||||
11960 | bool &AnyDependentBases) { | ||||||||||
11961 | // Check whether the named type is a direct base class. | ||||||||||
11962 | CanQualType CanonicalDesiredBase = DesiredBase->getCanonicalTypeUnqualified() | ||||||||||
11963 | .getUnqualifiedType(); | ||||||||||
11964 | for (auto &Base : Derived->bases()) { | ||||||||||
11965 | CanQualType BaseType = Base.getType()->getCanonicalTypeUnqualified(); | ||||||||||
11966 | if (CanonicalDesiredBase == BaseType) | ||||||||||
11967 | return &Base; | ||||||||||
11968 | if (BaseType->isDependentType()) | ||||||||||
11969 | AnyDependentBases = true; | ||||||||||
11970 | } | ||||||||||
11971 | return nullptr; | ||||||||||
11972 | } | ||||||||||
11973 | |||||||||||
11974 | namespace { | ||||||||||
11975 | class UsingValidatorCCC final : public CorrectionCandidateCallback { | ||||||||||
11976 | public: | ||||||||||
11977 | UsingValidatorCCC(bool HasTypenameKeyword, bool IsInstantiation, | ||||||||||
11978 | NestedNameSpecifier *NNS, CXXRecordDecl *RequireMemberOf) | ||||||||||
11979 | : HasTypenameKeyword(HasTypenameKeyword), | ||||||||||
11980 | IsInstantiation(IsInstantiation), OldNNS(NNS), | ||||||||||
11981 | RequireMemberOf(RequireMemberOf) {} | ||||||||||
11982 | |||||||||||
11983 | bool ValidateCandidate(const TypoCorrection &Candidate) override { | ||||||||||
11984 | NamedDecl *ND = Candidate.getCorrectionDecl(); | ||||||||||
11985 | |||||||||||
11986 | // Keywords are not valid here. | ||||||||||
11987 | if (!ND || isa<NamespaceDecl>(ND)) | ||||||||||
11988 | return false; | ||||||||||
11989 | |||||||||||
11990 | // Completely unqualified names are invalid for a 'using' declaration. | ||||||||||
11991 | if (Candidate.WillReplaceSpecifier() && !Candidate.getCorrectionSpecifier()) | ||||||||||
11992 | return false; | ||||||||||
11993 | |||||||||||
11994 | // FIXME: Don't correct to a name that CheckUsingDeclRedeclaration would | ||||||||||
11995 | // reject. | ||||||||||
11996 | |||||||||||
11997 | if (RequireMemberOf) { | ||||||||||
11998 | auto *FoundRecord = dyn_cast<CXXRecordDecl>(ND); | ||||||||||
11999 | if (FoundRecord && FoundRecord->isInjectedClassName()) { | ||||||||||
12000 | // No-one ever wants a using-declaration to name an injected-class-name | ||||||||||
12001 | // of a base class, unless they're declaring an inheriting constructor. | ||||||||||
12002 | ASTContext &Ctx = ND->getASTContext(); | ||||||||||
12003 | if (!Ctx.getLangOpts().CPlusPlus11) | ||||||||||
12004 | return false; | ||||||||||
12005 | QualType FoundType = Ctx.getRecordType(FoundRecord); | ||||||||||
12006 | |||||||||||
12007 | // Check that the injected-class-name is named as a member of its own | ||||||||||
12008 | // type; we don't want to suggest 'using Derived::Base;', since that | ||||||||||
12009 | // means something else. | ||||||||||
12010 | NestedNameSpecifier *Specifier = | ||||||||||
12011 | Candidate.WillReplaceSpecifier() | ||||||||||
12012 | ? Candidate.getCorrectionSpecifier() | ||||||||||
12013 | : OldNNS; | ||||||||||
12014 | if (!Specifier->getAsType() || | ||||||||||
12015 | !Ctx.hasSameType(QualType(Specifier->getAsType(), 0), FoundType)) | ||||||||||
12016 | return false; | ||||||||||
12017 | |||||||||||
12018 | // Check that this inheriting constructor declaration actually names a | ||||||||||
12019 | // direct base class of the current class. | ||||||||||
12020 | bool AnyDependentBases = false; | ||||||||||
12021 | if (!findDirectBaseWithType(RequireMemberOf, | ||||||||||
12022 | Ctx.getRecordType(FoundRecord), | ||||||||||
12023 | AnyDependentBases) && | ||||||||||
12024 | !AnyDependentBases) | ||||||||||
12025 | return false; | ||||||||||
12026 | } else { | ||||||||||
12027 | auto *RD = dyn_cast<CXXRecordDecl>(ND->getDeclContext()); | ||||||||||
12028 | if (!RD || RequireMemberOf->isProvablyNotDerivedFrom(RD)) | ||||||||||
12029 | return false; | ||||||||||
12030 | |||||||||||
12031 | // FIXME: Check that the base class member is accessible? | ||||||||||
12032 | } | ||||||||||
12033 | } else { | ||||||||||
12034 | auto *FoundRecord = dyn_cast<CXXRecordDecl>(ND); | ||||||||||
12035 | if (FoundRecord && FoundRecord->isInjectedClassName()) | ||||||||||
12036 | return false; | ||||||||||
12037 | } | ||||||||||
12038 | |||||||||||
12039 | if (isa<TypeDecl>(ND)) | ||||||||||
12040 | return HasTypenameKeyword || !IsInstantiation; | ||||||||||
12041 | |||||||||||
12042 | return !HasTypenameKeyword; | ||||||||||
12043 | } | ||||||||||
12044 | |||||||||||
12045 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||||||
12046 | return std::make_unique<UsingValidatorCCC>(*this); | ||||||||||
12047 | } | ||||||||||
12048 | |||||||||||
12049 | private: | ||||||||||
12050 | bool HasTypenameKeyword; | ||||||||||
12051 | bool IsInstantiation; | ||||||||||
12052 | NestedNameSpecifier *OldNNS; | ||||||||||
12053 | CXXRecordDecl *RequireMemberOf; | ||||||||||
12054 | }; | ||||||||||
12055 | } // end anonymous namespace | ||||||||||
12056 | |||||||||||
12057 | /// Remove decls we can't actually see from a lookup being used to declare | ||||||||||
12058 | /// shadow using decls. | ||||||||||
12059 | /// | ||||||||||
12060 | /// \param S - The scope of the potential shadow decl | ||||||||||
12061 | /// \param Previous - The lookup of a potential shadow decl's name. | ||||||||||
12062 | void Sema::FilterUsingLookup(Scope *S, LookupResult &Previous) { | ||||||||||
12063 | // It is really dumb that we have to do this. | ||||||||||
12064 | LookupResult::Filter F = Previous.makeFilter(); | ||||||||||
12065 | while (F.hasNext()) { | ||||||||||
12066 | NamedDecl *D = F.next(); | ||||||||||
12067 | if (!isDeclInScope(D, CurContext, S)) | ||||||||||
12068 | F.erase(); | ||||||||||
12069 | // If we found a local extern declaration that's not ordinarily visible, | ||||||||||
12070 | // and this declaration is being added to a non-block scope, ignore it. | ||||||||||
12071 | // We're only checking for scope conflicts here, not also for violations | ||||||||||
12072 | // of the linkage rules. | ||||||||||
12073 | else if (!CurContext->isFunctionOrMethod() && D->isLocalExternDecl() && | ||||||||||
12074 | !(D->getIdentifierNamespace() & Decl::IDNS_Ordinary)) | ||||||||||
12075 | F.erase(); | ||||||||||
12076 | } | ||||||||||
12077 | F.done(); | ||||||||||
12078 | } | ||||||||||
12079 | |||||||||||
12080 | /// Builds a using declaration. | ||||||||||
12081 | /// | ||||||||||
12082 | /// \param IsInstantiation - Whether this call arises from an | ||||||||||
12083 | /// instantiation of an unresolved using declaration. We treat | ||||||||||
12084 | /// the lookup differently for these declarations. | ||||||||||
12085 | NamedDecl *Sema::BuildUsingDeclaration( | ||||||||||
12086 | Scope *S, AccessSpecifier AS, SourceLocation UsingLoc, | ||||||||||
12087 | bool HasTypenameKeyword, SourceLocation TypenameLoc, CXXScopeSpec &SS, | ||||||||||
12088 | DeclarationNameInfo NameInfo, SourceLocation EllipsisLoc, | ||||||||||
12089 | const ParsedAttributesView &AttrList, bool IsInstantiation, | ||||||||||
12090 | bool IsUsingIfExists) { | ||||||||||
12091 | assert(!SS.isInvalid() && "Invalid CXXScopeSpec.")(static_cast <bool> (!SS.isInvalid() && "Invalid CXXScopeSpec." ) ? void (0) : __assert_fail ("!SS.isInvalid() && \"Invalid CXXScopeSpec.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12091, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12092 | SourceLocation IdentLoc = NameInfo.getLoc(); | ||||||||||
12093 | assert(IdentLoc.isValid() && "Invalid TargetName location.")(static_cast <bool> (IdentLoc.isValid() && "Invalid TargetName location." ) ? void (0) : __assert_fail ("IdentLoc.isValid() && \"Invalid TargetName location.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12093, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12094 | |||||||||||
12095 | // FIXME: We ignore attributes for now. | ||||||||||
12096 | |||||||||||
12097 | // For an inheriting constructor declaration, the name of the using | ||||||||||
12098 | // declaration is the name of a constructor in this class, not in the | ||||||||||
12099 | // base class. | ||||||||||
12100 | DeclarationNameInfo UsingName = NameInfo; | ||||||||||
12101 | if (UsingName.getName().getNameKind() == DeclarationName::CXXConstructorName) | ||||||||||
12102 | if (auto *RD = dyn_cast<CXXRecordDecl>(CurContext)) | ||||||||||
12103 | UsingName.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||||||
12104 | Context.getCanonicalType(Context.getRecordType(RD)))); | ||||||||||
12105 | |||||||||||
12106 | // Do the redeclaration lookup in the current scope. | ||||||||||
12107 | LookupResult Previous(*this, UsingName, LookupUsingDeclName, | ||||||||||
12108 | ForVisibleRedeclaration); | ||||||||||
12109 | Previous.setHideTags(false); | ||||||||||
12110 | if (S) { | ||||||||||
12111 | LookupName(Previous, S); | ||||||||||
12112 | |||||||||||
12113 | FilterUsingLookup(S, Previous); | ||||||||||
12114 | } else { | ||||||||||
12115 | assert(IsInstantiation && "no scope in non-instantiation")(static_cast <bool> (IsInstantiation && "no scope in non-instantiation" ) ? void (0) : __assert_fail ("IsInstantiation && \"no scope in non-instantiation\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12115, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12116 | if (CurContext->isRecord()) | ||||||||||
12117 | LookupQualifiedName(Previous, CurContext); | ||||||||||
12118 | else { | ||||||||||
12119 | // No redeclaration check is needed here; in non-member contexts we | ||||||||||
12120 | // diagnosed all possible conflicts with other using-declarations when | ||||||||||
12121 | // building the template: | ||||||||||
12122 | // | ||||||||||
12123 | // For a dependent non-type using declaration, the only valid case is | ||||||||||
12124 | // if we instantiate to a single enumerator. We check for conflicts | ||||||||||
12125 | // between shadow declarations we introduce, and we check in the template | ||||||||||
12126 | // definition for conflicts between a non-type using declaration and any | ||||||||||
12127 | // other declaration, which together covers all cases. | ||||||||||
12128 | // | ||||||||||
12129 | // A dependent typename using declaration will never successfully | ||||||||||
12130 | // instantiate, since it will always name a class member, so we reject | ||||||||||
12131 | // that in the template definition. | ||||||||||
12132 | } | ||||||||||
12133 | } | ||||||||||
12134 | |||||||||||
12135 | // Check for invalid redeclarations. | ||||||||||
12136 | if (CheckUsingDeclRedeclaration(UsingLoc, HasTypenameKeyword, | ||||||||||
12137 | SS, IdentLoc, Previous)) | ||||||||||
12138 | return nullptr; | ||||||||||
12139 | |||||||||||
12140 | // 'using_if_exists' doesn't make sense on an inherited constructor. | ||||||||||
12141 | if (IsUsingIfExists && UsingName.getName().getNameKind() == | ||||||||||
12142 | DeclarationName::CXXConstructorName) { | ||||||||||
12143 | Diag(UsingLoc, diag::err_using_if_exists_on_ctor); | ||||||||||
12144 | return nullptr; | ||||||||||
12145 | } | ||||||||||
12146 | |||||||||||
12147 | DeclContext *LookupContext = computeDeclContext(SS); | ||||||||||
12148 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | ||||||||||
12149 | if (!LookupContext || EllipsisLoc.isValid()) { | ||||||||||
12150 | NamedDecl *D; | ||||||||||
12151 | // Dependent scope, or an unexpanded pack | ||||||||||
12152 | if (!LookupContext && CheckUsingDeclQualifier(UsingLoc, HasTypenameKeyword, | ||||||||||
12153 | SS, NameInfo, IdentLoc)) | ||||||||||
12154 | return nullptr; | ||||||||||
12155 | |||||||||||
12156 | if (HasTypenameKeyword) { | ||||||||||
12157 | // FIXME: not all declaration name kinds are legal here | ||||||||||
12158 | D = UnresolvedUsingTypenameDecl::Create(Context, CurContext, | ||||||||||
12159 | UsingLoc, TypenameLoc, | ||||||||||
12160 | QualifierLoc, | ||||||||||
12161 | IdentLoc, NameInfo.getName(), | ||||||||||
12162 | EllipsisLoc); | ||||||||||
12163 | } else { | ||||||||||
12164 | D = UnresolvedUsingValueDecl::Create(Context, CurContext, UsingLoc, | ||||||||||
12165 | QualifierLoc, NameInfo, EllipsisLoc); | ||||||||||
12166 | } | ||||||||||
12167 | D->setAccess(AS); | ||||||||||
12168 | CurContext->addDecl(D); | ||||||||||
12169 | ProcessDeclAttributeList(S, D, AttrList); | ||||||||||
12170 | return D; | ||||||||||
12171 | } | ||||||||||
12172 | |||||||||||
12173 | auto Build = [&](bool Invalid) { | ||||||||||
12174 | UsingDecl *UD = | ||||||||||
12175 | UsingDecl::Create(Context, CurContext, UsingLoc, QualifierLoc, | ||||||||||
12176 | UsingName, HasTypenameKeyword); | ||||||||||
12177 | UD->setAccess(AS); | ||||||||||
12178 | CurContext->addDecl(UD); | ||||||||||
12179 | ProcessDeclAttributeList(S, UD, AttrList); | ||||||||||
12180 | UD->setInvalidDecl(Invalid); | ||||||||||
12181 | return UD; | ||||||||||
12182 | }; | ||||||||||
12183 | auto BuildInvalid = [&]{ return Build(true); }; | ||||||||||
12184 | auto BuildValid = [&]{ return Build(false); }; | ||||||||||
12185 | |||||||||||
12186 | if (RequireCompleteDeclContext(SS, LookupContext)) | ||||||||||
12187 | return BuildInvalid(); | ||||||||||
12188 | |||||||||||
12189 | // Look up the target name. | ||||||||||
12190 | LookupResult R(*this, NameInfo, LookupOrdinaryName); | ||||||||||
12191 | |||||||||||
12192 | // Unlike most lookups, we don't always want to hide tag | ||||||||||
12193 | // declarations: tag names are visible through the using declaration | ||||||||||
12194 | // even if hidden by ordinary names, *except* in a dependent context | ||||||||||
12195 | // where it's important for the sanity of two-phase lookup. | ||||||||||
12196 | if (!IsInstantiation) | ||||||||||
12197 | R.setHideTags(false); | ||||||||||
12198 | |||||||||||
12199 | // For the purposes of this lookup, we have a base object type | ||||||||||
12200 | // equal to that of the current context. | ||||||||||
12201 | if (CurContext->isRecord()) { | ||||||||||
12202 | R.setBaseObjectType( | ||||||||||
12203 | Context.getTypeDeclType(cast<CXXRecordDecl>(CurContext))); | ||||||||||
12204 | } | ||||||||||
12205 | |||||||||||
12206 | LookupQualifiedName(R, LookupContext); | ||||||||||
12207 | |||||||||||
12208 | // Validate the context, now we have a lookup | ||||||||||
12209 | if (CheckUsingDeclQualifier(UsingLoc, HasTypenameKeyword, SS, NameInfo, | ||||||||||
12210 | IdentLoc, &R)) | ||||||||||
12211 | return nullptr; | ||||||||||
12212 | |||||||||||
12213 | if (R.empty() && IsUsingIfExists) | ||||||||||
12214 | R.addDecl(UnresolvedUsingIfExistsDecl::Create(Context, CurContext, UsingLoc, | ||||||||||
12215 | UsingName.getName()), | ||||||||||
12216 | AS_public); | ||||||||||
12217 | |||||||||||
12218 | // Try to correct typos if possible. If constructor name lookup finds no | ||||||||||
12219 | // results, that means the named class has no explicit constructors, and we | ||||||||||
12220 | // suppressed declaring implicit ones (probably because it's dependent or | ||||||||||
12221 | // invalid). | ||||||||||
12222 | if (R.empty() && | ||||||||||
12223 | NameInfo.getName().getNameKind() != DeclarationName::CXXConstructorName) { | ||||||||||
12224 | // HACK 2017-01-08: Work around an issue with libstdc++'s detection of | ||||||||||
12225 | // ::gets. Sometimes it believes that glibc provides a ::gets in cases where | ||||||||||
12226 | // it does not. The issue was fixed in libstdc++ 6.3 (2016-12-21) and later. | ||||||||||
12227 | auto *II = NameInfo.getName().getAsIdentifierInfo(); | ||||||||||
12228 | if (getLangOpts().CPlusPlus14 && II && II->isStr("gets") && | ||||||||||
12229 | CurContext->isStdNamespace() && | ||||||||||
12230 | isa<TranslationUnitDecl>(LookupContext) && | ||||||||||
12231 | getSourceManager().isInSystemHeader(UsingLoc)) | ||||||||||
12232 | return nullptr; | ||||||||||
12233 | UsingValidatorCCC CCC(HasTypenameKeyword, IsInstantiation, SS.getScopeRep(), | ||||||||||
12234 | dyn_cast<CXXRecordDecl>(CurContext)); | ||||||||||
12235 | if (TypoCorrection Corrected = | ||||||||||
12236 | CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), S, &SS, CCC, | ||||||||||
12237 | CTK_ErrorRecovery)) { | ||||||||||
12238 | // We reject candidates where DroppedSpecifier == true, hence the | ||||||||||
12239 | // literal '0' below. | ||||||||||
12240 | diagnoseTypo(Corrected, PDiag(diag::err_no_member_suggest) | ||||||||||
12241 | << NameInfo.getName() << LookupContext << 0 | ||||||||||
12242 | << SS.getRange()); | ||||||||||
12243 | |||||||||||
12244 | // If we picked a correction with no attached Decl we can't do anything | ||||||||||
12245 | // useful with it, bail out. | ||||||||||
12246 | NamedDecl *ND = Corrected.getCorrectionDecl(); | ||||||||||
12247 | if (!ND) | ||||||||||
12248 | return BuildInvalid(); | ||||||||||
12249 | |||||||||||
12250 | // If we corrected to an inheriting constructor, handle it as one. | ||||||||||
12251 | auto *RD = dyn_cast<CXXRecordDecl>(ND); | ||||||||||
12252 | if (RD && RD->isInjectedClassName()) { | ||||||||||
12253 | // The parent of the injected class name is the class itself. | ||||||||||
12254 | RD = cast<CXXRecordDecl>(RD->getParent()); | ||||||||||
12255 | |||||||||||
12256 | // Fix up the information we'll use to build the using declaration. | ||||||||||
12257 | if (Corrected.WillReplaceSpecifier()) { | ||||||||||
12258 | NestedNameSpecifierLocBuilder Builder; | ||||||||||
12259 | Builder.MakeTrivial(Context, Corrected.getCorrectionSpecifier(), | ||||||||||
12260 | QualifierLoc.getSourceRange()); | ||||||||||
12261 | QualifierLoc = Builder.getWithLocInContext(Context); | ||||||||||
12262 | } | ||||||||||
12263 | |||||||||||
12264 | // In this case, the name we introduce is the name of a derived class | ||||||||||
12265 | // constructor. | ||||||||||
12266 | auto *CurClass = cast<CXXRecordDecl>(CurContext); | ||||||||||
12267 | UsingName.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||||||
12268 | Context.getCanonicalType(Context.getRecordType(CurClass)))); | ||||||||||
12269 | UsingName.setNamedTypeInfo(nullptr); | ||||||||||
12270 | for (auto *Ctor : LookupConstructors(RD)) | ||||||||||
12271 | R.addDecl(Ctor); | ||||||||||
12272 | R.resolveKind(); | ||||||||||
12273 | } else { | ||||||||||
12274 | // FIXME: Pick up all the declarations if we found an overloaded | ||||||||||
12275 | // function. | ||||||||||
12276 | UsingName.setName(ND->getDeclName()); | ||||||||||
12277 | R.addDecl(ND); | ||||||||||
12278 | } | ||||||||||
12279 | } else { | ||||||||||
12280 | Diag(IdentLoc, diag::err_no_member) | ||||||||||
12281 | << NameInfo.getName() << LookupContext << SS.getRange(); | ||||||||||
12282 | return BuildInvalid(); | ||||||||||
12283 | } | ||||||||||
12284 | } | ||||||||||
12285 | |||||||||||
12286 | if (R.isAmbiguous()) | ||||||||||
12287 | return BuildInvalid(); | ||||||||||
12288 | |||||||||||
12289 | if (HasTypenameKeyword) { | ||||||||||
12290 | // If we asked for a typename and got a non-type decl, error out. | ||||||||||
12291 | if (!R.getAsSingle<TypeDecl>() && | ||||||||||
12292 | !R.getAsSingle<UnresolvedUsingIfExistsDecl>()) { | ||||||||||
12293 | Diag(IdentLoc, diag::err_using_typename_non_type); | ||||||||||
12294 | for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) | ||||||||||
12295 | Diag((*I)->getUnderlyingDecl()->getLocation(), | ||||||||||
12296 | diag::note_using_decl_target); | ||||||||||
12297 | return BuildInvalid(); | ||||||||||
12298 | } | ||||||||||
12299 | } else { | ||||||||||
12300 | // If we asked for a non-typename and we got a type, error out, | ||||||||||
12301 | // but only if this is an instantiation of an unresolved using | ||||||||||
12302 | // decl. Otherwise just silently find the type name. | ||||||||||
12303 | if (IsInstantiation && R.getAsSingle<TypeDecl>()) { | ||||||||||
12304 | Diag(IdentLoc, diag::err_using_dependent_value_is_type); | ||||||||||
12305 | Diag(R.getFoundDecl()->getLocation(), diag::note_using_decl_target); | ||||||||||
12306 | return BuildInvalid(); | ||||||||||
12307 | } | ||||||||||
12308 | } | ||||||||||
12309 | |||||||||||
12310 | // C++14 [namespace.udecl]p6: | ||||||||||
12311 | // A using-declaration shall not name a namespace. | ||||||||||
12312 | if (R.getAsSingle<NamespaceDecl>()) { | ||||||||||
12313 | Diag(IdentLoc, diag::err_using_decl_can_not_refer_to_namespace) | ||||||||||
12314 | << SS.getRange(); | ||||||||||
12315 | return BuildInvalid(); | ||||||||||
12316 | } | ||||||||||
12317 | |||||||||||
12318 | UsingDecl *UD = BuildValid(); | ||||||||||
12319 | |||||||||||
12320 | // Some additional rules apply to inheriting constructors. | ||||||||||
12321 | if (UsingName.getName().getNameKind() == | ||||||||||
12322 | DeclarationName::CXXConstructorName) { | ||||||||||
12323 | // Suppress access diagnostics; the access check is instead performed at the | ||||||||||
12324 | // point of use for an inheriting constructor. | ||||||||||
12325 | R.suppressDiagnostics(); | ||||||||||
12326 | if (CheckInheritingConstructorUsingDecl(UD)) | ||||||||||
12327 | return UD; | ||||||||||
12328 | } | ||||||||||
12329 | |||||||||||
12330 | for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) { | ||||||||||
12331 | UsingShadowDecl *PrevDecl = nullptr; | ||||||||||
12332 | if (!CheckUsingShadowDecl(UD, *I, Previous, PrevDecl)) | ||||||||||
12333 | BuildUsingShadowDecl(S, UD, *I, PrevDecl); | ||||||||||
12334 | } | ||||||||||
12335 | |||||||||||
12336 | return UD; | ||||||||||
12337 | } | ||||||||||
12338 | |||||||||||
12339 | NamedDecl *Sema::BuildUsingEnumDeclaration(Scope *S, AccessSpecifier AS, | ||||||||||
12340 | SourceLocation UsingLoc, | ||||||||||
12341 | SourceLocation EnumLoc, | ||||||||||
12342 | SourceLocation NameLoc, | ||||||||||
12343 | EnumDecl *ED) { | ||||||||||
12344 | bool Invalid = false; | ||||||||||
12345 | |||||||||||
12346 | if (CurContext->getRedeclContext()->isRecord()) { | ||||||||||
12347 | /// In class scope, check if this is a duplicate, for better a diagnostic. | ||||||||||
12348 | DeclarationNameInfo UsingEnumName(ED->getDeclName(), NameLoc); | ||||||||||
12349 | LookupResult Previous(*this, UsingEnumName, LookupUsingDeclName, | ||||||||||
12350 | ForVisibleRedeclaration); | ||||||||||
12351 | |||||||||||
12352 | LookupName(Previous, S); | ||||||||||
12353 | |||||||||||
12354 | for (NamedDecl *D : Previous) | ||||||||||
12355 | if (UsingEnumDecl *UED = dyn_cast<UsingEnumDecl>(D)) | ||||||||||
12356 | if (UED->getEnumDecl() == ED) { | ||||||||||
12357 | Diag(UsingLoc, diag::err_using_enum_decl_redeclaration) | ||||||||||
12358 | << SourceRange(EnumLoc, NameLoc); | ||||||||||
12359 | Diag(D->getLocation(), diag::note_using_enum_decl) << 1; | ||||||||||
12360 | Invalid = true; | ||||||||||
12361 | break; | ||||||||||
12362 | } | ||||||||||
12363 | } | ||||||||||
12364 | |||||||||||
12365 | if (RequireCompleteEnumDecl(ED, NameLoc)) | ||||||||||
12366 | Invalid = true; | ||||||||||
12367 | |||||||||||
12368 | UsingEnumDecl *UD = UsingEnumDecl::Create(Context, CurContext, UsingLoc, | ||||||||||
12369 | EnumLoc, NameLoc, ED); | ||||||||||
12370 | UD->setAccess(AS); | ||||||||||
12371 | CurContext->addDecl(UD); | ||||||||||
12372 | |||||||||||
12373 | if (Invalid) { | ||||||||||
12374 | UD->setInvalidDecl(); | ||||||||||
12375 | return UD; | ||||||||||
12376 | } | ||||||||||
12377 | |||||||||||
12378 | // Create the shadow decls for each enumerator | ||||||||||
12379 | for (EnumConstantDecl *EC : ED->enumerators()) { | ||||||||||
12380 | UsingShadowDecl *PrevDecl = nullptr; | ||||||||||
12381 | DeclarationNameInfo DNI(EC->getDeclName(), EC->getLocation()); | ||||||||||
12382 | LookupResult Previous(*this, DNI, LookupOrdinaryName, | ||||||||||
12383 | ForVisibleRedeclaration); | ||||||||||
12384 | LookupName(Previous, S); | ||||||||||
12385 | FilterUsingLookup(S, Previous); | ||||||||||
12386 | |||||||||||
12387 | if (!CheckUsingShadowDecl(UD, EC, Previous, PrevDecl)) | ||||||||||
12388 | BuildUsingShadowDecl(S, UD, EC, PrevDecl); | ||||||||||
12389 | } | ||||||||||
12390 | |||||||||||
12391 | return UD; | ||||||||||
12392 | } | ||||||||||
12393 | |||||||||||
12394 | NamedDecl *Sema::BuildUsingPackDecl(NamedDecl *InstantiatedFrom, | ||||||||||
12395 | ArrayRef<NamedDecl *> Expansions) { | ||||||||||
12396 | assert(isa<UnresolvedUsingValueDecl>(InstantiatedFrom) ||(static_cast <bool> (isa<UnresolvedUsingValueDecl> (InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>( InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom )) ? void (0) : __assert_fail ("isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12398, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
12397 | isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) ||(static_cast <bool> (isa<UnresolvedUsingValueDecl> (InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>( InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom )) ? void (0) : __assert_fail ("isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12398, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
12398 | isa<UsingPackDecl>(InstantiatedFrom))(static_cast <bool> (isa<UnresolvedUsingValueDecl> (InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>( InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom )) ? void (0) : __assert_fail ("isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12398, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12399 | |||||||||||
12400 | auto *UPD = | ||||||||||
12401 | UsingPackDecl::Create(Context, CurContext, InstantiatedFrom, Expansions); | ||||||||||
12402 | UPD->setAccess(InstantiatedFrom->getAccess()); | ||||||||||
12403 | CurContext->addDecl(UPD); | ||||||||||
12404 | return UPD; | ||||||||||
12405 | } | ||||||||||
12406 | |||||||||||
12407 | /// Additional checks for a using declaration referring to a constructor name. | ||||||||||
12408 | bool Sema::CheckInheritingConstructorUsingDecl(UsingDecl *UD) { | ||||||||||
12409 | assert(!UD->hasTypename() && "expecting a constructor name")(static_cast <bool> (!UD->hasTypename() && "expecting a constructor name" ) ? void (0) : __assert_fail ("!UD->hasTypename() && \"expecting a constructor name\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12409, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12410 | |||||||||||
12411 | const Type *SourceType = UD->getQualifier()->getAsType(); | ||||||||||
12412 | assert(SourceType &&(static_cast <bool> (SourceType && "Using decl naming constructor doesn't have type in scope spec." ) ? void (0) : __assert_fail ("SourceType && \"Using decl naming constructor doesn't have type in scope spec.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12413, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
12413 | "Using decl naming constructor doesn't have type in scope spec.")(static_cast <bool> (SourceType && "Using decl naming constructor doesn't have type in scope spec." ) ? void (0) : __assert_fail ("SourceType && \"Using decl naming constructor doesn't have type in scope spec.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12413, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12414 | CXXRecordDecl *TargetClass = cast<CXXRecordDecl>(CurContext); | ||||||||||
12415 | |||||||||||
12416 | // Check whether the named type is a direct base class. | ||||||||||
12417 | bool AnyDependentBases = false; | ||||||||||
12418 | auto *Base = findDirectBaseWithType(TargetClass, QualType(SourceType, 0), | ||||||||||
12419 | AnyDependentBases); | ||||||||||
12420 | if (!Base && !AnyDependentBases) { | ||||||||||
12421 | Diag(UD->getUsingLoc(), | ||||||||||
12422 | diag::err_using_decl_constructor_not_in_direct_base) | ||||||||||
12423 | << UD->getNameInfo().getSourceRange() | ||||||||||
12424 | << QualType(SourceType, 0) << TargetClass; | ||||||||||
12425 | UD->setInvalidDecl(); | ||||||||||
12426 | return true; | ||||||||||
12427 | } | ||||||||||
12428 | |||||||||||
12429 | if (Base) | ||||||||||
12430 | Base->setInheritConstructors(); | ||||||||||
12431 | |||||||||||
12432 | return false; | ||||||||||
12433 | } | ||||||||||
12434 | |||||||||||
12435 | /// Checks that the given using declaration is not an invalid | ||||||||||
12436 | /// redeclaration. Note that this is checking only for the using decl | ||||||||||
12437 | /// itself, not for any ill-formedness among the UsingShadowDecls. | ||||||||||
12438 | bool Sema::CheckUsingDeclRedeclaration(SourceLocation UsingLoc, | ||||||||||
12439 | bool HasTypenameKeyword, | ||||||||||
12440 | const CXXScopeSpec &SS, | ||||||||||
12441 | SourceLocation NameLoc, | ||||||||||
12442 | const LookupResult &Prev) { | ||||||||||
12443 | NestedNameSpecifier *Qual = SS.getScopeRep(); | ||||||||||
12444 | |||||||||||
12445 | // C++03 [namespace.udecl]p8: | ||||||||||
12446 | // C++0x [namespace.udecl]p10: | ||||||||||
12447 | // A using-declaration is a declaration and can therefore be used | ||||||||||
12448 | // repeatedly where (and only where) multiple declarations are | ||||||||||
12449 | // allowed. | ||||||||||
12450 | // | ||||||||||
12451 | // That's in non-member contexts. | ||||||||||
12452 | if (!CurContext->getRedeclContext()->isRecord()) { | ||||||||||
12453 | // A dependent qualifier outside a class can only ever resolve to an | ||||||||||
12454 | // enumeration type. Therefore it conflicts with any other non-type | ||||||||||
12455 | // declaration in the same scope. | ||||||||||
12456 | // FIXME: How should we check for dependent type-type conflicts at block | ||||||||||
12457 | // scope? | ||||||||||
12458 | if (Qual->isDependent() && !HasTypenameKeyword) { | ||||||||||
12459 | for (auto *D : Prev) { | ||||||||||
12460 | if (!isa<TypeDecl>(D) && !isa<UsingDecl>(D) && !isa<UsingPackDecl>(D)) { | ||||||||||
12461 | bool OldCouldBeEnumerator = | ||||||||||
12462 | isa<UnresolvedUsingValueDecl>(D) || isa<EnumConstantDecl>(D); | ||||||||||
12463 | Diag(NameLoc, | ||||||||||
12464 | OldCouldBeEnumerator ? diag::err_redefinition | ||||||||||
12465 | : diag::err_redefinition_different_kind) | ||||||||||
12466 | << Prev.getLookupName(); | ||||||||||
12467 | Diag(D->getLocation(), diag::note_previous_definition); | ||||||||||
12468 | return true; | ||||||||||
12469 | } | ||||||||||
12470 | } | ||||||||||
12471 | } | ||||||||||
12472 | return false; | ||||||||||
12473 | } | ||||||||||
12474 | |||||||||||
12475 | for (LookupResult::iterator I = Prev.begin(), E = Prev.end(); I != E; ++I) { | ||||||||||
12476 | NamedDecl *D = *I; | ||||||||||
12477 | |||||||||||
12478 | bool DTypename; | ||||||||||
12479 | NestedNameSpecifier *DQual; | ||||||||||
12480 | if (UsingDecl *UD = dyn_cast<UsingDecl>(D)) { | ||||||||||
12481 | DTypename = UD->hasTypename(); | ||||||||||
12482 | DQual = UD->getQualifier(); | ||||||||||
12483 | } else if (UnresolvedUsingValueDecl *UD | ||||||||||
12484 | = dyn_cast<UnresolvedUsingValueDecl>(D)) { | ||||||||||
12485 | DTypename = false; | ||||||||||
12486 | DQual = UD->getQualifier(); | ||||||||||
12487 | } else if (UnresolvedUsingTypenameDecl *UD | ||||||||||
12488 | = dyn_cast<UnresolvedUsingTypenameDecl>(D)) { | ||||||||||
12489 | DTypename = true; | ||||||||||
12490 | DQual = UD->getQualifier(); | ||||||||||
12491 | } else continue; | ||||||||||
12492 | |||||||||||
12493 | // using decls differ if one says 'typename' and the other doesn't. | ||||||||||
12494 | // FIXME: non-dependent using decls? | ||||||||||
12495 | if (HasTypenameKeyword != DTypename) continue; | ||||||||||
12496 | |||||||||||
12497 | // using decls differ if they name different scopes (but note that | ||||||||||
12498 | // template instantiation can cause this check to trigger when it | ||||||||||
12499 | // didn't before instantiation). | ||||||||||
12500 | if (Context.getCanonicalNestedNameSpecifier(Qual) != | ||||||||||
12501 | Context.getCanonicalNestedNameSpecifier(DQual)) | ||||||||||
12502 | continue; | ||||||||||
12503 | |||||||||||
12504 | Diag(NameLoc, diag::err_using_decl_redeclaration) << SS.getRange(); | ||||||||||
12505 | Diag(D->getLocation(), diag::note_using_decl) << 1; | ||||||||||
12506 | return true; | ||||||||||
12507 | } | ||||||||||
12508 | |||||||||||
12509 | return false; | ||||||||||
12510 | } | ||||||||||
12511 | |||||||||||
12512 | /// Checks that the given nested-name qualifier used in a using decl | ||||||||||
12513 | /// in the current context is appropriately related to the current | ||||||||||
12514 | /// scope. If an error is found, diagnoses it and returns true. | ||||||||||
12515 | /// R is nullptr, if the caller has not (yet) done a lookup, otherwise it's the | ||||||||||
12516 | /// result of that lookup. UD is likewise nullptr, except when we have an | ||||||||||
12517 | /// already-populated UsingDecl whose shadow decls contain the same information | ||||||||||
12518 | /// (i.e. we're instantiating a UsingDecl with non-dependent scope). | ||||||||||
12519 | bool Sema::CheckUsingDeclQualifier(SourceLocation UsingLoc, bool HasTypename, | ||||||||||
12520 | const CXXScopeSpec &SS, | ||||||||||
12521 | const DeclarationNameInfo &NameInfo, | ||||||||||
12522 | SourceLocation NameLoc, | ||||||||||
12523 | const LookupResult *R, const UsingDecl *UD) { | ||||||||||
12524 | DeclContext *NamedContext = computeDeclContext(SS); | ||||||||||
12525 | assert(bool(NamedContext) == (R || UD) && !(R && UD) &&(static_cast <bool> (bool(NamedContext) == (R || UD) && !(R && UD) && "resolvable context must have exactly one set of decls" ) ? void (0) : __assert_fail ("bool(NamedContext) == (R || UD) && !(R && UD) && \"resolvable context must have exactly one set of decls\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12526, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
12526 | "resolvable context must have exactly one set of decls")(static_cast <bool> (bool(NamedContext) == (R || UD) && !(R && UD) && "resolvable context must have exactly one set of decls" ) ? void (0) : __assert_fail ("bool(NamedContext) == (R || UD) && !(R && UD) && \"resolvable context must have exactly one set of decls\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12526, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12527 | |||||||||||
12528 | // C++ 20 permits using an enumerator that does not have a class-hierarchy | ||||||||||
12529 | // relationship. | ||||||||||
12530 | bool Cxx20Enumerator = false; | ||||||||||
12531 | if (NamedContext) { | ||||||||||
12532 | EnumConstantDecl *EC = nullptr; | ||||||||||
12533 | if (R) | ||||||||||
12534 | EC = R->getAsSingle<EnumConstantDecl>(); | ||||||||||
12535 | else if (UD && UD->shadow_size() == 1) | ||||||||||
12536 | EC = dyn_cast<EnumConstantDecl>(UD->shadow_begin()->getTargetDecl()); | ||||||||||
12537 | if (EC) | ||||||||||
12538 | Cxx20Enumerator = getLangOpts().CPlusPlus20; | ||||||||||
12539 | |||||||||||
12540 | if (auto *ED = dyn_cast<EnumDecl>(NamedContext)) { | ||||||||||
12541 | // C++14 [namespace.udecl]p7: | ||||||||||
12542 | // A using-declaration shall not name a scoped enumerator. | ||||||||||
12543 | // C++20 p1099 permits enumerators. | ||||||||||
12544 | if (EC && R && ED->isScoped()) | ||||||||||
12545 | Diag(SS.getBeginLoc(), | ||||||||||
12546 | getLangOpts().CPlusPlus20 | ||||||||||
12547 | ? diag::warn_cxx17_compat_using_decl_scoped_enumerator | ||||||||||
12548 | : diag::ext_using_decl_scoped_enumerator) | ||||||||||
12549 | << SS.getRange(); | ||||||||||
12550 | |||||||||||
12551 | // We want to consider the scope of the enumerator | ||||||||||
12552 | NamedContext = ED->getDeclContext(); | ||||||||||
12553 | } | ||||||||||
12554 | } | ||||||||||
12555 | |||||||||||
12556 | if (!CurContext->isRecord()) { | ||||||||||
12557 | // C++03 [namespace.udecl]p3: | ||||||||||
12558 | // C++0x [namespace.udecl]p8: | ||||||||||
12559 | // A using-declaration for a class member shall be a member-declaration. | ||||||||||
12560 | // C++20 [namespace.udecl]p7 | ||||||||||
12561 | // ... other than an enumerator ... | ||||||||||
12562 | |||||||||||
12563 | // If we weren't able to compute a valid scope, it might validly be a | ||||||||||
12564 | // dependent class or enumeration scope. If we have a 'typename' keyword, | ||||||||||
12565 | // the scope must resolve to a class type. | ||||||||||
12566 | if (NamedContext ? !NamedContext->getRedeclContext()->isRecord() | ||||||||||
12567 | : !HasTypename) | ||||||||||
12568 | return false; // OK | ||||||||||
12569 | |||||||||||
12570 | Diag(NameLoc, | ||||||||||
12571 | Cxx20Enumerator | ||||||||||
12572 | ? diag::warn_cxx17_compat_using_decl_class_member_enumerator | ||||||||||
12573 | : diag::err_using_decl_can_not_refer_to_class_member) | ||||||||||
12574 | << SS.getRange(); | ||||||||||
12575 | |||||||||||
12576 | if (Cxx20Enumerator) | ||||||||||
12577 | return false; // OK | ||||||||||
12578 | |||||||||||
12579 | auto *RD = NamedContext | ||||||||||
12580 | ? cast<CXXRecordDecl>(NamedContext->getRedeclContext()) | ||||||||||
12581 | : nullptr; | ||||||||||
12582 | if (RD && !RequireCompleteDeclContext(const_cast<CXXScopeSpec &>(SS), RD)) { | ||||||||||
12583 | // See if there's a helpful fixit | ||||||||||
12584 | |||||||||||
12585 | if (!R) { | ||||||||||
12586 | // We will have already diagnosed the problem on the template | ||||||||||
12587 | // definition, Maybe we should do so again? | ||||||||||
12588 | } else if (R->getAsSingle<TypeDecl>()) { | ||||||||||
12589 | if (getLangOpts().CPlusPlus11) { | ||||||||||
12590 | // Convert 'using X::Y;' to 'using Y = X::Y;'. | ||||||||||
12591 | Diag(SS.getBeginLoc(), diag::note_using_decl_class_member_workaround) | ||||||||||
12592 | << 0 // alias declaration | ||||||||||
12593 | << FixItHint::CreateInsertion(SS.getBeginLoc(), | ||||||||||
12594 | NameInfo.getName().getAsString() + | ||||||||||
12595 | " = "); | ||||||||||
12596 | } else { | ||||||||||
12597 | // Convert 'using X::Y;' to 'typedef X::Y Y;'. | ||||||||||
12598 | SourceLocation InsertLoc = getLocForEndOfToken(NameInfo.getEndLoc()); | ||||||||||
12599 | Diag(InsertLoc, diag::note_using_decl_class_member_workaround) | ||||||||||
12600 | << 1 // typedef declaration | ||||||||||
12601 | << FixItHint::CreateReplacement(UsingLoc, "typedef") | ||||||||||
12602 | << FixItHint::CreateInsertion( | ||||||||||
12603 | InsertLoc, " " + NameInfo.getName().getAsString()); | ||||||||||
12604 | } | ||||||||||
12605 | } else if (R->getAsSingle<VarDecl>()) { | ||||||||||
12606 | // Don't provide a fixit outside C++11 mode; we don't want to suggest | ||||||||||
12607 | // repeating the type of the static data member here. | ||||||||||
12608 | FixItHint FixIt; | ||||||||||
12609 | if (getLangOpts().CPlusPlus11) { | ||||||||||
12610 | // Convert 'using X::Y;' to 'auto &Y = X::Y;'. | ||||||||||
12611 | FixIt = FixItHint::CreateReplacement( | ||||||||||
12612 | UsingLoc, "auto &" + NameInfo.getName().getAsString() + " = "); | ||||||||||
12613 | } | ||||||||||
12614 | |||||||||||
12615 | Diag(UsingLoc, diag::note_using_decl_class_member_workaround) | ||||||||||
12616 | << 2 // reference declaration | ||||||||||
12617 | << FixIt; | ||||||||||
12618 | } else if (R->getAsSingle<EnumConstantDecl>()) { | ||||||||||
12619 | // Don't provide a fixit outside C++11 mode; we don't want to suggest | ||||||||||
12620 | // repeating the type of the enumeration here, and we can't do so if | ||||||||||
12621 | // the type is anonymous. | ||||||||||
12622 | FixItHint FixIt; | ||||||||||
12623 | if (getLangOpts().CPlusPlus11) { | ||||||||||
12624 | // Convert 'using X::Y;' to 'auto &Y = X::Y;'. | ||||||||||
12625 | FixIt = FixItHint::CreateReplacement( | ||||||||||
12626 | UsingLoc, | ||||||||||
12627 | "constexpr auto " + NameInfo.getName().getAsString() + " = "); | ||||||||||
12628 | } | ||||||||||
12629 | |||||||||||
12630 | Diag(UsingLoc, diag::note_using_decl_class_member_workaround) | ||||||||||
12631 | << (getLangOpts().CPlusPlus11 ? 4 : 3) // const[expr] variable | ||||||||||
12632 | << FixIt; | ||||||||||
12633 | } | ||||||||||
12634 | } | ||||||||||
12635 | |||||||||||
12636 | return true; // Fail | ||||||||||
12637 | } | ||||||||||
12638 | |||||||||||
12639 | // If the named context is dependent, we can't decide much. | ||||||||||
12640 | if (!NamedContext) { | ||||||||||
12641 | // FIXME: in C++0x, we can diagnose if we can prove that the | ||||||||||
12642 | // nested-name-specifier does not refer to a base class, which is | ||||||||||
12643 | // still possible in some cases. | ||||||||||
12644 | |||||||||||
12645 | // Otherwise we have to conservatively report that things might be | ||||||||||
12646 | // okay. | ||||||||||
12647 | return false; | ||||||||||
12648 | } | ||||||||||
12649 | |||||||||||
12650 | // The current scope is a record. | ||||||||||
12651 | if (!NamedContext->isRecord()) { | ||||||||||
12652 | // Ideally this would point at the last name in the specifier, | ||||||||||
12653 | // but we don't have that level of source info. | ||||||||||
12654 | Diag(SS.getBeginLoc(), | ||||||||||
12655 | Cxx20Enumerator | ||||||||||
12656 | ? diag::warn_cxx17_compat_using_decl_non_member_enumerator | ||||||||||
12657 | : diag::err_using_decl_nested_name_specifier_is_not_class) | ||||||||||
12658 | << SS.getScopeRep() << SS.getRange(); | ||||||||||
12659 | |||||||||||
12660 | if (Cxx20Enumerator) | ||||||||||
12661 | return false; // OK | ||||||||||
12662 | |||||||||||
12663 | return true; | ||||||||||
12664 | } | ||||||||||
12665 | |||||||||||
12666 | if (!NamedContext->isDependentContext() && | ||||||||||
12667 | RequireCompleteDeclContext(const_cast<CXXScopeSpec&>(SS), NamedContext)) | ||||||||||
12668 | return true; | ||||||||||
12669 | |||||||||||
12670 | if (getLangOpts().CPlusPlus11) { | ||||||||||
12671 | // C++11 [namespace.udecl]p3: | ||||||||||
12672 | // In a using-declaration used as a member-declaration, the | ||||||||||
12673 | // nested-name-specifier shall name a base class of the class | ||||||||||
12674 | // being defined. | ||||||||||
12675 | |||||||||||
12676 | if (cast<CXXRecordDecl>(CurContext)->isProvablyNotDerivedFrom( | ||||||||||
12677 | cast<CXXRecordDecl>(NamedContext))) { | ||||||||||
12678 | |||||||||||
12679 | if (Cxx20Enumerator) { | ||||||||||
12680 | Diag(NameLoc, diag::warn_cxx17_compat_using_decl_non_member_enumerator) | ||||||||||
12681 | << SS.getRange(); | ||||||||||
12682 | return false; | ||||||||||
12683 | } | ||||||||||
12684 | |||||||||||
12685 | if (CurContext == NamedContext) { | ||||||||||
12686 | Diag(SS.getBeginLoc(), | ||||||||||
12687 | diag::err_using_decl_nested_name_specifier_is_current_class) | ||||||||||
12688 | << SS.getRange(); | ||||||||||
12689 | return !getLangOpts().CPlusPlus20; | ||||||||||
12690 | } | ||||||||||
12691 | |||||||||||
12692 | if (!cast<CXXRecordDecl>(NamedContext)->isInvalidDecl()) { | ||||||||||
12693 | Diag(SS.getBeginLoc(), | ||||||||||
12694 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||||||||
12695 | << SS.getScopeRep() << cast<CXXRecordDecl>(CurContext) | ||||||||||
12696 | << SS.getRange(); | ||||||||||
12697 | } | ||||||||||
12698 | return true; | ||||||||||
12699 | } | ||||||||||
12700 | |||||||||||
12701 | return false; | ||||||||||
12702 | } | ||||||||||
12703 | |||||||||||
12704 | // C++03 [namespace.udecl]p4: | ||||||||||
12705 | // A using-declaration used as a member-declaration shall refer | ||||||||||
12706 | // to a member of a base class of the class being defined [etc.]. | ||||||||||
12707 | |||||||||||
12708 | // Salient point: SS doesn't have to name a base class as long as | ||||||||||
12709 | // lookup only finds members from base classes. Therefore we can | ||||||||||
12710 | // diagnose here only if we can prove that that can't happen, | ||||||||||
12711 | // i.e. if the class hierarchies provably don't intersect. | ||||||||||
12712 | |||||||||||
12713 | // TODO: it would be nice if "definitely valid" results were cached | ||||||||||
12714 | // in the UsingDecl and UsingShadowDecl so that these checks didn't | ||||||||||
12715 | // need to be repeated. | ||||||||||
12716 | |||||||||||
12717 | llvm::SmallPtrSet<const CXXRecordDecl *, 4> Bases; | ||||||||||
12718 | auto Collect = [&Bases](const CXXRecordDecl *Base) { | ||||||||||
12719 | Bases.insert(Base); | ||||||||||
12720 | return true; | ||||||||||
12721 | }; | ||||||||||
12722 | |||||||||||
12723 | // Collect all bases. Return false if we find a dependent base. | ||||||||||
12724 | if (!cast<CXXRecordDecl>(CurContext)->forallBases(Collect)) | ||||||||||
12725 | return false; | ||||||||||
12726 | |||||||||||
12727 | // Returns true if the base is dependent or is one of the accumulated base | ||||||||||
12728 | // classes. | ||||||||||
12729 | auto IsNotBase = [&Bases](const CXXRecordDecl *Base) { | ||||||||||
12730 | return !Bases.count(Base); | ||||||||||
12731 | }; | ||||||||||
12732 | |||||||||||
12733 | // Return false if the class has a dependent base or if it or one | ||||||||||
12734 | // of its bases is present in the base set of the current context. | ||||||||||
12735 | if (Bases.count(cast<CXXRecordDecl>(NamedContext)) || | ||||||||||
12736 | !cast<CXXRecordDecl>(NamedContext)->forallBases(IsNotBase)) | ||||||||||
12737 | return false; | ||||||||||
12738 | |||||||||||
12739 | Diag(SS.getRange().getBegin(), | ||||||||||
12740 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||||||||
12741 | << SS.getScopeRep() | ||||||||||
12742 | << cast<CXXRecordDecl>(CurContext) | ||||||||||
12743 | << SS.getRange(); | ||||||||||
12744 | |||||||||||
12745 | return true; | ||||||||||
12746 | } | ||||||||||
12747 | |||||||||||
12748 | Decl *Sema::ActOnAliasDeclaration(Scope *S, AccessSpecifier AS, | ||||||||||
12749 | MultiTemplateParamsArg TemplateParamLists, | ||||||||||
12750 | SourceLocation UsingLoc, UnqualifiedId &Name, | ||||||||||
12751 | const ParsedAttributesView &AttrList, | ||||||||||
12752 | TypeResult Type, Decl *DeclFromDeclSpec) { | ||||||||||
12753 | // Skip up to the relevant declaration scope. | ||||||||||
12754 | while (S->isTemplateParamScope()) | ||||||||||
12755 | S = S->getParent(); | ||||||||||
12756 | assert((S->getFlags() & Scope::DeclScope) &&(static_cast <bool> ((S->getFlags() & Scope::DeclScope ) && "got alias-declaration outside of declaration scope" ) ? void (0) : __assert_fail ("(S->getFlags() & Scope::DeclScope) && \"got alias-declaration outside of declaration scope\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12757, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
12757 | "got alias-declaration outside of declaration scope")(static_cast <bool> ((S->getFlags() & Scope::DeclScope ) && "got alias-declaration outside of declaration scope" ) ? void (0) : __assert_fail ("(S->getFlags() & Scope::DeclScope) && \"got alias-declaration outside of declaration scope\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12757, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12758 | |||||||||||
12759 | if (Type.isInvalid()) | ||||||||||
12760 | return nullptr; | ||||||||||
12761 | |||||||||||
12762 | bool Invalid = false; | ||||||||||
12763 | DeclarationNameInfo NameInfo = GetNameFromUnqualifiedId(Name); | ||||||||||
12764 | TypeSourceInfo *TInfo = nullptr; | ||||||||||
12765 | GetTypeFromParser(Type.get(), &TInfo); | ||||||||||
12766 | |||||||||||
12767 | if (DiagnoseClassNameShadow(CurContext, NameInfo)) | ||||||||||
12768 | return nullptr; | ||||||||||
12769 | |||||||||||
12770 | if (DiagnoseUnexpandedParameterPack(Name.StartLocation, TInfo, | ||||||||||
12771 | UPPC_DeclarationType)) { | ||||||||||
12772 | Invalid = true; | ||||||||||
12773 | TInfo = Context.getTrivialTypeSourceInfo(Context.IntTy, | ||||||||||
12774 | TInfo->getTypeLoc().getBeginLoc()); | ||||||||||
12775 | } | ||||||||||
12776 | |||||||||||
12777 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||||||
12778 | TemplateParamLists.size() | ||||||||||
12779 | ? forRedeclarationInCurContext() | ||||||||||
12780 | : ForVisibleRedeclaration); | ||||||||||
12781 | LookupName(Previous, S); | ||||||||||
12782 | |||||||||||
12783 | // Warn about shadowing the name of a template parameter. | ||||||||||
12784 | if (Previous.isSingleResult() && | ||||||||||
12785 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||||||
12786 | DiagnoseTemplateParameterShadow(Name.StartLocation,Previous.getFoundDecl()); | ||||||||||
12787 | Previous.clear(); | ||||||||||
12788 | } | ||||||||||
12789 | |||||||||||
12790 | assert(Name.Kind == UnqualifiedIdKind::IK_Identifier &&(static_cast <bool> (Name.Kind == UnqualifiedIdKind::IK_Identifier && "name in alias declaration must be an identifier" ) ? void (0) : __assert_fail ("Name.Kind == UnqualifiedIdKind::IK_Identifier && \"name in alias declaration must be an identifier\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12791, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
12791 | "name in alias declaration must be an identifier")(static_cast <bool> (Name.Kind == UnqualifiedIdKind::IK_Identifier && "name in alias declaration must be an identifier" ) ? void (0) : __assert_fail ("Name.Kind == UnqualifiedIdKind::IK_Identifier && \"name in alias declaration must be an identifier\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12791, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12792 | TypeAliasDecl *NewTD = TypeAliasDecl::Create(Context, CurContext, UsingLoc, | ||||||||||
12793 | Name.StartLocation, | ||||||||||
12794 | Name.Identifier, TInfo); | ||||||||||
12795 | |||||||||||
12796 | NewTD->setAccess(AS); | ||||||||||
12797 | |||||||||||
12798 | if (Invalid) | ||||||||||
12799 | NewTD->setInvalidDecl(); | ||||||||||
12800 | |||||||||||
12801 | ProcessDeclAttributeList(S, NewTD, AttrList); | ||||||||||
12802 | AddPragmaAttributes(S, NewTD); | ||||||||||
12803 | |||||||||||
12804 | CheckTypedefForVariablyModifiedType(S, NewTD); | ||||||||||
12805 | Invalid |= NewTD->isInvalidDecl(); | ||||||||||
12806 | |||||||||||
12807 | bool Redeclaration = false; | ||||||||||
12808 | |||||||||||
12809 | NamedDecl *NewND; | ||||||||||
12810 | if (TemplateParamLists.size()) { | ||||||||||
12811 | TypeAliasTemplateDecl *OldDecl = nullptr; | ||||||||||
12812 | TemplateParameterList *OldTemplateParams = nullptr; | ||||||||||
12813 | |||||||||||
12814 | if (TemplateParamLists.size() != 1) { | ||||||||||
12815 | Diag(UsingLoc, diag::err_alias_template_extra_headers) | ||||||||||
12816 | << SourceRange(TemplateParamLists[1]->getTemplateLoc(), | ||||||||||
12817 | TemplateParamLists[TemplateParamLists.size()-1]->getRAngleLoc()); | ||||||||||
12818 | } | ||||||||||
12819 | TemplateParameterList *TemplateParams = TemplateParamLists[0]; | ||||||||||
12820 | |||||||||||
12821 | // Check that we can declare a template here. | ||||||||||
12822 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||||||||
12823 | return nullptr; | ||||||||||
12824 | |||||||||||
12825 | // Only consider previous declarations in the same scope. | ||||||||||
12826 | FilterLookupForScope(Previous, CurContext, S, /*ConsiderLinkage*/false, | ||||||||||
12827 | /*ExplicitInstantiationOrSpecialization*/false); | ||||||||||
12828 | if (!Previous.empty()) { | ||||||||||
12829 | Redeclaration = true; | ||||||||||
12830 | |||||||||||
12831 | OldDecl = Previous.getAsSingle<TypeAliasTemplateDecl>(); | ||||||||||
12832 | if (!OldDecl && !Invalid) { | ||||||||||
12833 | Diag(UsingLoc, diag::err_redefinition_different_kind) | ||||||||||
12834 | << Name.Identifier; | ||||||||||
12835 | |||||||||||
12836 | NamedDecl *OldD = Previous.getRepresentativeDecl(); | ||||||||||
12837 | if (OldD->getLocation().isValid()) | ||||||||||
12838 | Diag(OldD->getLocation(), diag::note_previous_definition); | ||||||||||
12839 | |||||||||||
12840 | Invalid = true; | ||||||||||
12841 | } | ||||||||||
12842 | |||||||||||
12843 | if (!Invalid && OldDecl && !OldDecl->isInvalidDecl()) { | ||||||||||
12844 | if (TemplateParameterListsAreEqual(TemplateParams, | ||||||||||
12845 | OldDecl->getTemplateParameters(), | ||||||||||
12846 | /*Complain=*/true, | ||||||||||
12847 | TPL_TemplateMatch)) | ||||||||||
12848 | OldTemplateParams = | ||||||||||
12849 | OldDecl->getMostRecentDecl()->getTemplateParameters(); | ||||||||||
12850 | else | ||||||||||
12851 | Invalid = true; | ||||||||||
12852 | |||||||||||
12853 | TypeAliasDecl *OldTD = OldDecl->getTemplatedDecl(); | ||||||||||
12854 | if (!Invalid && | ||||||||||
12855 | !Context.hasSameType(OldTD->getUnderlyingType(), | ||||||||||
12856 | NewTD->getUnderlyingType())) { | ||||||||||
12857 | // FIXME: The C++0x standard does not clearly say this is ill-formed, | ||||||||||
12858 | // but we can't reasonably accept it. | ||||||||||
12859 | Diag(NewTD->getLocation(), diag::err_redefinition_different_typedef) | ||||||||||
12860 | << 2 << NewTD->getUnderlyingType() << OldTD->getUnderlyingType(); | ||||||||||
12861 | if (OldTD->getLocation().isValid()) | ||||||||||
12862 | Diag(OldTD->getLocation(), diag::note_previous_definition); | ||||||||||
12863 | Invalid = true; | ||||||||||
12864 | } | ||||||||||
12865 | } | ||||||||||
12866 | } | ||||||||||
12867 | |||||||||||
12868 | // Merge any previous default template arguments into our parameters, | ||||||||||
12869 | // and check the parameter list. | ||||||||||
12870 | if (CheckTemplateParameterList(TemplateParams, OldTemplateParams, | ||||||||||
12871 | TPC_TypeAliasTemplate)) | ||||||||||
12872 | return nullptr; | ||||||||||
12873 | |||||||||||
12874 | TypeAliasTemplateDecl *NewDecl = | ||||||||||
12875 | TypeAliasTemplateDecl::Create(Context, CurContext, UsingLoc, | ||||||||||
12876 | Name.Identifier, TemplateParams, | ||||||||||
12877 | NewTD); | ||||||||||
12878 | NewTD->setDescribedAliasTemplate(NewDecl); | ||||||||||
12879 | |||||||||||
12880 | NewDecl->setAccess(AS); | ||||||||||
12881 | |||||||||||
12882 | if (Invalid) | ||||||||||
12883 | NewDecl->setInvalidDecl(); | ||||||||||
12884 | else if (OldDecl) { | ||||||||||
12885 | NewDecl->setPreviousDecl(OldDecl); | ||||||||||
12886 | CheckRedeclarationModuleOwnership(NewDecl, OldDecl); | ||||||||||
12887 | } | ||||||||||
12888 | |||||||||||
12889 | NewND = NewDecl; | ||||||||||
12890 | } else { | ||||||||||
12891 | if (auto *TD = dyn_cast_or_null<TagDecl>(DeclFromDeclSpec)) { | ||||||||||
12892 | setTagNameForLinkagePurposes(TD, NewTD); | ||||||||||
12893 | handleTagNumbering(TD, S); | ||||||||||
12894 | } | ||||||||||
12895 | ActOnTypedefNameDecl(S, CurContext, NewTD, Previous, Redeclaration); | ||||||||||
12896 | NewND = NewTD; | ||||||||||
12897 | } | ||||||||||
12898 | |||||||||||
12899 | PushOnScopeChains(NewND, S); | ||||||||||
12900 | ActOnDocumentableDecl(NewND); | ||||||||||
12901 | return NewND; | ||||||||||
12902 | } | ||||||||||
12903 | |||||||||||
12904 | Decl *Sema::ActOnNamespaceAliasDef(Scope *S, SourceLocation NamespaceLoc, | ||||||||||
12905 | SourceLocation AliasLoc, | ||||||||||
12906 | IdentifierInfo *Alias, CXXScopeSpec &SS, | ||||||||||
12907 | SourceLocation IdentLoc, | ||||||||||
12908 | IdentifierInfo *Ident) { | ||||||||||
12909 | |||||||||||
12910 | // Lookup the namespace name. | ||||||||||
12911 | LookupResult R(*this, Ident, IdentLoc, LookupNamespaceName); | ||||||||||
12912 | LookupParsedName(R, S, &SS); | ||||||||||
12913 | |||||||||||
12914 | if (R.isAmbiguous()) | ||||||||||
12915 | return nullptr; | ||||||||||
12916 | |||||||||||
12917 | if (R.empty()) { | ||||||||||
12918 | if (!TryNamespaceTypoCorrection(*this, R, S, SS, IdentLoc, Ident)) { | ||||||||||
12919 | Diag(IdentLoc, diag::err_expected_namespace_name) << SS.getRange(); | ||||||||||
12920 | return nullptr; | ||||||||||
12921 | } | ||||||||||
12922 | } | ||||||||||
12923 | assert(!R.isAmbiguous() && !R.empty())(static_cast <bool> (!R.isAmbiguous() && !R.empty ()) ? void (0) : __assert_fail ("!R.isAmbiguous() && !R.empty()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 12923, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
12924 | NamedDecl *ND = R.getRepresentativeDecl(); | ||||||||||
12925 | |||||||||||
12926 | // Check if we have a previous declaration with the same name. | ||||||||||
12927 | LookupResult PrevR(*this, Alias, AliasLoc, LookupOrdinaryName, | ||||||||||
12928 | ForVisibleRedeclaration); | ||||||||||
12929 | LookupName(PrevR, S); | ||||||||||
12930 | |||||||||||
12931 | // Check we're not shadowing a template parameter. | ||||||||||
12932 | if (PrevR.isSingleResult() && PrevR.getFoundDecl()->isTemplateParameter()) { | ||||||||||
12933 | DiagnoseTemplateParameterShadow(AliasLoc, PrevR.getFoundDecl()); | ||||||||||
12934 | PrevR.clear(); | ||||||||||
12935 | } | ||||||||||
12936 | |||||||||||
12937 | // Filter out any other lookup result from an enclosing scope. | ||||||||||
12938 | FilterLookupForScope(PrevR, CurContext, S, /*ConsiderLinkage*/false, | ||||||||||
12939 | /*AllowInlineNamespace*/false); | ||||||||||
12940 | |||||||||||
12941 | // Find the previous declaration and check that we can redeclare it. | ||||||||||
12942 | NamespaceAliasDecl *Prev = nullptr; | ||||||||||
12943 | if (PrevR.isSingleResult()) { | ||||||||||
12944 | NamedDecl *PrevDecl = PrevR.getRepresentativeDecl(); | ||||||||||
12945 | if (NamespaceAliasDecl *AD = dyn_cast<NamespaceAliasDecl>(PrevDecl)) { | ||||||||||
12946 | // We already have an alias with the same name that points to the same | ||||||||||
12947 | // namespace; check that it matches. | ||||||||||
12948 | if (AD->getNamespace()->Equals(getNamespaceDecl(ND))) { | ||||||||||
12949 | Prev = AD; | ||||||||||
12950 | } else if (isVisible(PrevDecl)) { | ||||||||||
12951 | Diag(AliasLoc, diag::err_redefinition_different_namespace_alias) | ||||||||||
12952 | << Alias; | ||||||||||
12953 | Diag(AD->getLocation(), diag::note_previous_namespace_alias) | ||||||||||
12954 | << AD->getNamespace(); | ||||||||||
12955 | return nullptr; | ||||||||||
12956 | } | ||||||||||
12957 | } else if (isVisible(PrevDecl)) { | ||||||||||
12958 | unsigned DiagID = isa<NamespaceDecl>(PrevDecl->getUnderlyingDecl()) | ||||||||||
12959 | ? diag::err_redefinition | ||||||||||
12960 | : diag::err_redefinition_different_kind; | ||||||||||
12961 | Diag(AliasLoc, DiagID) << Alias; | ||||||||||
12962 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||||||||
12963 | return nullptr; | ||||||||||
12964 | } | ||||||||||
12965 | } | ||||||||||
12966 | |||||||||||
12967 | // The use of a nested name specifier may trigger deprecation warnings. | ||||||||||
12968 | DiagnoseUseOfDecl(ND, IdentLoc); | ||||||||||
12969 | |||||||||||
12970 | NamespaceAliasDecl *AliasDecl = | ||||||||||
12971 | NamespaceAliasDecl::Create(Context, CurContext, NamespaceLoc, AliasLoc, | ||||||||||
12972 | Alias, SS.getWithLocInContext(Context), | ||||||||||
12973 | IdentLoc, ND); | ||||||||||
12974 | if (Prev) | ||||||||||
12975 | AliasDecl->setPreviousDecl(Prev); | ||||||||||
12976 | |||||||||||
12977 | PushOnScopeChains(AliasDecl, S); | ||||||||||
12978 | return AliasDecl; | ||||||||||
12979 | } | ||||||||||
12980 | |||||||||||
12981 | namespace { | ||||||||||
12982 | struct SpecialMemberExceptionSpecInfo | ||||||||||
12983 | : SpecialMemberVisitor<SpecialMemberExceptionSpecInfo> { | ||||||||||
12984 | SourceLocation Loc; | ||||||||||
12985 | Sema::ImplicitExceptionSpecification ExceptSpec; | ||||||||||
12986 | |||||||||||
12987 | SpecialMemberExceptionSpecInfo(Sema &S, CXXMethodDecl *MD, | ||||||||||
12988 | Sema::CXXSpecialMember CSM, | ||||||||||
12989 | Sema::InheritedConstructorInfo *ICI, | ||||||||||
12990 | SourceLocation Loc) | ||||||||||
12991 | : SpecialMemberVisitor(S, MD, CSM, ICI), Loc(Loc), ExceptSpec(S) {} | ||||||||||
12992 | |||||||||||
12993 | bool visitBase(CXXBaseSpecifier *Base); | ||||||||||
12994 | bool visitField(FieldDecl *FD); | ||||||||||
12995 | |||||||||||
12996 | void visitClassSubobject(CXXRecordDecl *Class, Subobject Subobj, | ||||||||||
12997 | unsigned Quals); | ||||||||||
12998 | |||||||||||
12999 | void visitSubobjectCall(Subobject Subobj, | ||||||||||
13000 | Sema::SpecialMemberOverloadResult SMOR); | ||||||||||
13001 | }; | ||||||||||
13002 | } | ||||||||||
13003 | |||||||||||
13004 | bool SpecialMemberExceptionSpecInfo::visitBase(CXXBaseSpecifier *Base) { | ||||||||||
13005 | auto *RT = Base->getType()->getAs<RecordType>(); | ||||||||||
13006 | if (!RT) | ||||||||||
13007 | return false; | ||||||||||
13008 | |||||||||||
13009 | auto *BaseClass = cast<CXXRecordDecl>(RT->getDecl()); | ||||||||||
13010 | Sema::SpecialMemberOverloadResult SMOR = lookupInheritedCtor(BaseClass); | ||||||||||
13011 | if (auto *BaseCtor = SMOR.getMethod()) { | ||||||||||
13012 | visitSubobjectCall(Base, BaseCtor); | ||||||||||
13013 | return false; | ||||||||||
13014 | } | ||||||||||
13015 | |||||||||||
13016 | visitClassSubobject(BaseClass, Base, 0); | ||||||||||
13017 | return false; | ||||||||||
13018 | } | ||||||||||
13019 | |||||||||||
13020 | bool SpecialMemberExceptionSpecInfo::visitField(FieldDecl *FD) { | ||||||||||
13021 | if (CSM == Sema::CXXDefaultConstructor && FD->hasInClassInitializer()) { | ||||||||||
13022 | Expr *E = FD->getInClassInitializer(); | ||||||||||
13023 | if (!E) | ||||||||||
13024 | // FIXME: It's a little wasteful to build and throw away a | ||||||||||
13025 | // CXXDefaultInitExpr here. | ||||||||||
13026 | // FIXME: We should have a single context note pointing at Loc, and | ||||||||||
13027 | // this location should be MD->getLocation() instead, since that's | ||||||||||
13028 | // the location where we actually use the default init expression. | ||||||||||
13029 | E = S.BuildCXXDefaultInitExpr(Loc, FD).get(); | ||||||||||
13030 | if (E) | ||||||||||
13031 | ExceptSpec.CalledExpr(E); | ||||||||||
13032 | } else if (auto *RT = S.Context.getBaseElementType(FD->getType()) | ||||||||||
13033 | ->getAs<RecordType>()) { | ||||||||||
13034 | visitClassSubobject(cast<CXXRecordDecl>(RT->getDecl()), FD, | ||||||||||
13035 | FD->getType().getCVRQualifiers()); | ||||||||||
13036 | } | ||||||||||
13037 | return false; | ||||||||||
13038 | } | ||||||||||
13039 | |||||||||||
13040 | void SpecialMemberExceptionSpecInfo::visitClassSubobject(CXXRecordDecl *Class, | ||||||||||
13041 | Subobject Subobj, | ||||||||||
13042 | unsigned Quals) { | ||||||||||
13043 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||||||||
13044 | bool IsMutable = Field && Field->isMutable(); | ||||||||||
13045 | visitSubobjectCall(Subobj, lookupIn(Class, Quals, IsMutable)); | ||||||||||
13046 | } | ||||||||||
13047 | |||||||||||
13048 | void SpecialMemberExceptionSpecInfo::visitSubobjectCall( | ||||||||||
13049 | Subobject Subobj, Sema::SpecialMemberOverloadResult SMOR) { | ||||||||||
13050 | // Note, if lookup fails, it doesn't matter what exception specification we | ||||||||||
13051 | // choose because the special member will be deleted. | ||||||||||
13052 | if (CXXMethodDecl *MD = SMOR.getMethod()) | ||||||||||
13053 | ExceptSpec.CalledDecl(getSubobjectLoc(Subobj), MD); | ||||||||||
13054 | } | ||||||||||
13055 | |||||||||||
13056 | bool Sema::tryResolveExplicitSpecifier(ExplicitSpecifier &ExplicitSpec) { | ||||||||||
13057 | llvm::APSInt Result; | ||||||||||
13058 | ExprResult Converted = CheckConvertedConstantExpression( | ||||||||||
13059 | ExplicitSpec.getExpr(), Context.BoolTy, Result, CCEK_ExplicitBool); | ||||||||||
13060 | ExplicitSpec.setExpr(Converted.get()); | ||||||||||
13061 | if (Converted.isUsable() && !Converted.get()->isValueDependent()) { | ||||||||||
13062 | ExplicitSpec.setKind(Result.getBoolValue() | ||||||||||
13063 | ? ExplicitSpecKind::ResolvedTrue | ||||||||||
13064 | : ExplicitSpecKind::ResolvedFalse); | ||||||||||
13065 | return true; | ||||||||||
13066 | } | ||||||||||
13067 | ExplicitSpec.setKind(ExplicitSpecKind::Unresolved); | ||||||||||
13068 | return false; | ||||||||||
13069 | } | ||||||||||
13070 | |||||||||||
13071 | ExplicitSpecifier Sema::ActOnExplicitBoolSpecifier(Expr *ExplicitExpr) { | ||||||||||
13072 | ExplicitSpecifier ES(ExplicitExpr, ExplicitSpecKind::Unresolved); | ||||||||||
13073 | if (!ExplicitExpr->isTypeDependent()) | ||||||||||
13074 | tryResolveExplicitSpecifier(ES); | ||||||||||
13075 | return ES; | ||||||||||
13076 | } | ||||||||||
13077 | |||||||||||
13078 | static Sema::ImplicitExceptionSpecification | ||||||||||
13079 | ComputeDefaultedSpecialMemberExceptionSpec( | ||||||||||
13080 | Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||||||||
13081 | Sema::InheritedConstructorInfo *ICI) { | ||||||||||
13082 | ComputingExceptionSpec CES(S, MD, Loc); | ||||||||||
13083 | |||||||||||
13084 | CXXRecordDecl *ClassDecl = MD->getParent(); | ||||||||||
13085 | |||||||||||
13086 | // C++ [except.spec]p14: | ||||||||||
13087 | // An implicitly declared special member function (Clause 12) shall have an | ||||||||||
13088 | // exception-specification. [...] | ||||||||||
13089 | SpecialMemberExceptionSpecInfo Info(S, MD, CSM, ICI, MD->getLocation()); | ||||||||||
13090 | if (ClassDecl->isInvalidDecl()) | ||||||||||
13091 | return Info.ExceptSpec; | ||||||||||
13092 | |||||||||||
13093 | // FIXME: If this diagnostic fires, we're probably missing a check for | ||||||||||
13094 | // attempting to resolve an exception specification before it's known | ||||||||||
13095 | // at a higher level. | ||||||||||
13096 | if (S.RequireCompleteType(MD->getLocation(), | ||||||||||
13097 | S.Context.getRecordType(ClassDecl), | ||||||||||
13098 | diag::err_exception_spec_incomplete_type)) | ||||||||||
13099 | return Info.ExceptSpec; | ||||||||||
13100 | |||||||||||
13101 | // C++1z [except.spec]p7: | ||||||||||
13102 | // [Look for exceptions thrown by] a constructor selected [...] to | ||||||||||
13103 | // initialize a potentially constructed subobject, | ||||||||||
13104 | // C++1z [except.spec]p8: | ||||||||||
13105 | // The exception specification for an implicitly-declared destructor, or a | ||||||||||
13106 | // destructor without a noexcept-specifier, is potentially-throwing if and | ||||||||||
13107 | // only if any of the destructors for any of its potentially constructed | ||||||||||
13108 | // subojects is potentially throwing. | ||||||||||
13109 | // FIXME: We respect the first rule but ignore the "potentially constructed" | ||||||||||
13110 | // in the second rule to resolve a core issue (no number yet) that would have | ||||||||||
13111 | // us reject: | ||||||||||
13112 | // struct A { virtual void f() = 0; virtual ~A() noexcept(false) = 0; }; | ||||||||||
13113 | // struct B : A {}; | ||||||||||
13114 | // struct C : B { void f(); }; | ||||||||||
13115 | // ... due to giving B::~B() a non-throwing exception specification. | ||||||||||
13116 | Info.visit(Info.IsConstructor ? Info.VisitPotentiallyConstructedBases | ||||||||||
13117 | : Info.VisitAllBases); | ||||||||||
13118 | |||||||||||
13119 | return Info.ExceptSpec; | ||||||||||
13120 | } | ||||||||||
13121 | |||||||||||
13122 | namespace { | ||||||||||
13123 | /// RAII object to register a special member as being currently declared. | ||||||||||
13124 | struct DeclaringSpecialMember { | ||||||||||
13125 | Sema &S; | ||||||||||
13126 | Sema::SpecialMemberDecl D; | ||||||||||
13127 | Sema::ContextRAII SavedContext; | ||||||||||
13128 | bool WasAlreadyBeingDeclared; | ||||||||||
13129 | |||||||||||
13130 | DeclaringSpecialMember(Sema &S, CXXRecordDecl *RD, Sema::CXXSpecialMember CSM) | ||||||||||
13131 | : S(S), D(RD, CSM), SavedContext(S, RD) { | ||||||||||
13132 | WasAlreadyBeingDeclared = !S.SpecialMembersBeingDeclared.insert(D).second; | ||||||||||
13133 | if (WasAlreadyBeingDeclared) | ||||||||||
13134 | // This almost never happens, but if it does, ensure that our cache | ||||||||||
13135 | // doesn't contain a stale result. | ||||||||||
13136 | S.SpecialMemberCache.clear(); | ||||||||||
13137 | else { | ||||||||||
13138 | // Register a note to be produced if we encounter an error while | ||||||||||
13139 | // declaring the special member. | ||||||||||
13140 | Sema::CodeSynthesisContext Ctx; | ||||||||||
13141 | Ctx.Kind = Sema::CodeSynthesisContext::DeclaringSpecialMember; | ||||||||||
13142 | // FIXME: We don't have a location to use here. Using the class's | ||||||||||
13143 | // location maintains the fiction that we declare all special members | ||||||||||
13144 | // with the class, but (1) it's not clear that lying about that helps our | ||||||||||
13145 | // users understand what's going on, and (2) there may be outer contexts | ||||||||||
13146 | // on the stack (some of which are relevant) and printing them exposes | ||||||||||
13147 | // our lies. | ||||||||||
13148 | Ctx.PointOfInstantiation = RD->getLocation(); | ||||||||||
13149 | Ctx.Entity = RD; | ||||||||||
13150 | Ctx.SpecialMember = CSM; | ||||||||||
13151 | S.pushCodeSynthesisContext(Ctx); | ||||||||||
13152 | } | ||||||||||
13153 | } | ||||||||||
13154 | ~DeclaringSpecialMember() { | ||||||||||
13155 | if (!WasAlreadyBeingDeclared) { | ||||||||||
13156 | S.SpecialMembersBeingDeclared.erase(D); | ||||||||||
13157 | S.popCodeSynthesisContext(); | ||||||||||
13158 | } | ||||||||||
13159 | } | ||||||||||
13160 | |||||||||||
13161 | /// Are we already trying to declare this special member? | ||||||||||
13162 | bool isAlreadyBeingDeclared() const { | ||||||||||
13163 | return WasAlreadyBeingDeclared; | ||||||||||
13164 | } | ||||||||||
13165 | }; | ||||||||||
13166 | } | ||||||||||
13167 | |||||||||||
13168 | void Sema::CheckImplicitSpecialMemberDeclaration(Scope *S, FunctionDecl *FD) { | ||||||||||
13169 | // Look up any existing declarations, but don't trigger declaration of all | ||||||||||
13170 | // implicit special members with this name. | ||||||||||
13171 | DeclarationName Name = FD->getDeclName(); | ||||||||||
13172 | LookupResult R(*this, Name, SourceLocation(), LookupOrdinaryName, | ||||||||||
13173 | ForExternalRedeclaration); | ||||||||||
13174 | for (auto *D : FD->getParent()->lookup(Name)) | ||||||||||
13175 | if (auto *Acceptable = R.getAcceptableDecl(D)) | ||||||||||
13176 | R.addDecl(Acceptable); | ||||||||||
13177 | R.resolveKind(); | ||||||||||
13178 | R.suppressDiagnostics(); | ||||||||||
13179 | |||||||||||
13180 | CheckFunctionDeclaration(S, FD, R, /*IsMemberSpecialization*/false); | ||||||||||
13181 | } | ||||||||||
13182 | |||||||||||
13183 | void Sema::setupImplicitSpecialMemberType(CXXMethodDecl *SpecialMem, | ||||||||||
13184 | QualType ResultTy, | ||||||||||
13185 | ArrayRef<QualType> Args) { | ||||||||||
13186 | // Build an exception specification pointing back at this constructor. | ||||||||||
13187 | FunctionProtoType::ExtProtoInfo EPI = getImplicitMethodEPI(*this, SpecialMem); | ||||||||||
13188 | |||||||||||
13189 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||||||||
13190 | if (AS != LangAS::Default) { | ||||||||||
13191 | EPI.TypeQuals.addAddressSpace(AS); | ||||||||||
13192 | } | ||||||||||
13193 | |||||||||||
13194 | auto QT = Context.getFunctionType(ResultTy, Args, EPI); | ||||||||||
13195 | SpecialMem->setType(QT); | ||||||||||
13196 | |||||||||||
13197 | // During template instantiation of implicit special member functions we need | ||||||||||
13198 | // a reliable TypeSourceInfo for the function prototype in order to allow | ||||||||||
13199 | // functions to be substituted. | ||||||||||
13200 | if (inTemplateInstantiation() && | ||||||||||
13201 | cast<CXXRecordDecl>(SpecialMem->getParent())->isLambda()) { | ||||||||||
13202 | TypeSourceInfo *TSI = | ||||||||||
13203 | Context.getTrivialTypeSourceInfo(SpecialMem->getType()); | ||||||||||
13204 | SpecialMem->setTypeSourceInfo(TSI); | ||||||||||
13205 | } | ||||||||||
13206 | } | ||||||||||
13207 | |||||||||||
13208 | CXXConstructorDecl *Sema::DeclareImplicitDefaultConstructor( | ||||||||||
13209 | CXXRecordDecl *ClassDecl) { | ||||||||||
13210 | // C++ [class.ctor]p5: | ||||||||||
13211 | // A default constructor for a class X is a constructor of class X | ||||||||||
13212 | // that can be called without an argument. If there is no | ||||||||||
13213 | // user-declared constructor for class X, a default constructor is | ||||||||||
13214 | // implicitly declared. An implicitly-declared default constructor | ||||||||||
13215 | // is an inline public member of its class. | ||||||||||
13216 | assert(ClassDecl->needsImplicitDefaultConstructor() &&(static_cast <bool> (ClassDecl->needsImplicitDefaultConstructor () && "Should not build implicit default constructor!" ) ? void (0) : __assert_fail ("ClassDecl->needsImplicitDefaultConstructor() && \"Should not build implicit default constructor!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13217, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13217 | "Should not build implicit default constructor!")(static_cast <bool> (ClassDecl->needsImplicitDefaultConstructor () && "Should not build implicit default constructor!" ) ? void (0) : __assert_fail ("ClassDecl->needsImplicitDefaultConstructor() && \"Should not build implicit default constructor!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13217, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13218 | |||||||||||
13219 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXDefaultConstructor); | ||||||||||
13220 | if (DSM.isAlreadyBeingDeclared()) | ||||||||||
13221 | return nullptr; | ||||||||||
13222 | |||||||||||
13223 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||||||
13224 | CXXDefaultConstructor, | ||||||||||
13225 | false); | ||||||||||
13226 | |||||||||||
13227 | // Create the actual constructor declaration. | ||||||||||
13228 | CanQualType ClassType | ||||||||||
13229 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||||||||
13230 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||||||
13231 | DeclarationName Name | ||||||||||
13232 | = Context.DeclarationNames.getCXXConstructorName(ClassType); | ||||||||||
13233 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||||||
13234 | CXXConstructorDecl *DefaultCon = CXXConstructorDecl::Create( | ||||||||||
13235 | Context, ClassDecl, ClassLoc, NameInfo, /*Type*/ QualType(), | ||||||||||
13236 | /*TInfo=*/nullptr, ExplicitSpecifier(), | ||||||||||
13237 | /*isInline=*/true, /*isImplicitlyDeclared=*/true, | ||||||||||
13238 | Constexpr ? ConstexprSpecKind::Constexpr | ||||||||||
13239 | : ConstexprSpecKind::Unspecified); | ||||||||||
13240 | DefaultCon->setAccess(AS_public); | ||||||||||
13241 | DefaultCon->setDefaulted(); | ||||||||||
13242 | |||||||||||
13243 | if (getLangOpts().CUDA) { | ||||||||||
13244 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXDefaultConstructor, | ||||||||||
13245 | DefaultCon, | ||||||||||
13246 | /* ConstRHS */ false, | ||||||||||
13247 | /* Diagnose */ false); | ||||||||||
13248 | } | ||||||||||
13249 | |||||||||||
13250 | setupImplicitSpecialMemberType(DefaultCon, Context.VoidTy, None); | ||||||||||
13251 | |||||||||||
13252 | // We don't need to use SpecialMemberIsTrivial here; triviality for default | ||||||||||
13253 | // constructors is easy to compute. | ||||||||||
13254 | DefaultCon->setTrivial(ClassDecl->hasTrivialDefaultConstructor()); | ||||||||||
13255 | |||||||||||
13256 | // Note that we have declared this constructor. | ||||||||||
13257 | ++getASTContext().NumImplicitDefaultConstructorsDeclared; | ||||||||||
13258 | |||||||||||
13259 | Scope *S = getScopeForContext(ClassDecl); | ||||||||||
13260 | CheckImplicitSpecialMemberDeclaration(S, DefaultCon); | ||||||||||
13261 | |||||||||||
13262 | if (ShouldDeleteSpecialMember(DefaultCon, CXXDefaultConstructor)) | ||||||||||
13263 | SetDeclDeleted(DefaultCon, ClassLoc); | ||||||||||
13264 | |||||||||||
13265 | if (S) | ||||||||||
13266 | PushOnScopeChains(DefaultCon, S, false); | ||||||||||
13267 | ClassDecl->addDecl(DefaultCon); | ||||||||||
13268 | |||||||||||
13269 | return DefaultCon; | ||||||||||
13270 | } | ||||||||||
13271 | |||||||||||
13272 | void Sema::DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, | ||||||||||
13273 | CXXConstructorDecl *Constructor) { | ||||||||||
13274 | assert((Constructor->isDefaulted() && Constructor->isDefaultConstructor() &&(static_cast <bool> ((Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor ->doesThisDeclarationHaveABody() && !Constructor-> isDeleted()) && "DefineImplicitDefaultConstructor - call it for implicit default ctor" ) ? void (0) : __assert_fail ("(Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && \"DefineImplicitDefaultConstructor - call it for implicit default ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13277, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13275 | !Constructor->doesThisDeclarationHaveABody() &&(static_cast <bool> ((Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor ->doesThisDeclarationHaveABody() && !Constructor-> isDeleted()) && "DefineImplicitDefaultConstructor - call it for implicit default ctor" ) ? void (0) : __assert_fail ("(Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && \"DefineImplicitDefaultConstructor - call it for implicit default ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13277, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13276 | !Constructor->isDeleted()) &&(static_cast <bool> ((Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor ->doesThisDeclarationHaveABody() && !Constructor-> isDeleted()) && "DefineImplicitDefaultConstructor - call it for implicit default ctor" ) ? void (0) : __assert_fail ("(Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && \"DefineImplicitDefaultConstructor - call it for implicit default ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13277, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13277 | "DefineImplicitDefaultConstructor - call it for implicit default ctor")(static_cast <bool> ((Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor ->doesThisDeclarationHaveABody() && !Constructor-> isDeleted()) && "DefineImplicitDefaultConstructor - call it for implicit default ctor" ) ? void (0) : __assert_fail ("(Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && \"DefineImplicitDefaultConstructor - call it for implicit default ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13277, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13278 | if (Constructor->willHaveBody() || Constructor->isInvalidDecl()) | ||||||||||
13279 | return; | ||||||||||
13280 | |||||||||||
13281 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||||||||
13282 | assert(ClassDecl && "DefineImplicitDefaultConstructor - invalid constructor")(static_cast <bool> (ClassDecl && "DefineImplicitDefaultConstructor - invalid constructor" ) ? void (0) : __assert_fail ("ClassDecl && \"DefineImplicitDefaultConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13282, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13283 | |||||||||||
13284 | SynthesizedFunctionScope Scope(*this, Constructor); | ||||||||||
13285 | |||||||||||
13286 | // The exception specification is needed because we are defining the | ||||||||||
13287 | // function. | ||||||||||
13288 | ResolveExceptionSpec(CurrentLocation, | ||||||||||
13289 | Constructor->getType()->castAs<FunctionProtoType>()); | ||||||||||
13290 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||||||
13291 | |||||||||||
13292 | // Add a context note for diagnostics produced after this point. | ||||||||||
13293 | Scope.addContextNote(CurrentLocation); | ||||||||||
13294 | |||||||||||
13295 | if (SetCtorInitializers(Constructor, /*AnyErrors=*/false)) { | ||||||||||
13296 | Constructor->setInvalidDecl(); | ||||||||||
13297 | return; | ||||||||||
13298 | } | ||||||||||
13299 | |||||||||||
13300 | SourceLocation Loc = Constructor->getEndLoc().isValid() | ||||||||||
13301 | ? Constructor->getEndLoc() | ||||||||||
13302 | : Constructor->getLocation(); | ||||||||||
13303 | Constructor->setBody(new (Context) CompoundStmt(Loc)); | ||||||||||
13304 | Constructor->markUsed(Context); | ||||||||||
13305 | |||||||||||
13306 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
13307 | L->CompletedImplicitDefinition(Constructor); | ||||||||||
13308 | } | ||||||||||
13309 | |||||||||||
13310 | DiagnoseUninitializedFields(*this, Constructor); | ||||||||||
13311 | } | ||||||||||
13312 | |||||||||||
13313 | void Sema::ActOnFinishDelayedMemberInitializers(Decl *D) { | ||||||||||
13314 | // Perform any delayed checks on exception specifications. | ||||||||||
13315 | CheckDelayedMemberExceptionSpecs(); | ||||||||||
13316 | } | ||||||||||
13317 | |||||||||||
13318 | /// Find or create the fake constructor we synthesize to model constructing an | ||||||||||
13319 | /// object of a derived class via a constructor of a base class. | ||||||||||
13320 | CXXConstructorDecl * | ||||||||||
13321 | Sema::findInheritingConstructor(SourceLocation Loc, | ||||||||||
13322 | CXXConstructorDecl *BaseCtor, | ||||||||||
13323 | ConstructorUsingShadowDecl *Shadow) { | ||||||||||
13324 | CXXRecordDecl *Derived = Shadow->getParent(); | ||||||||||
13325 | SourceLocation UsingLoc = Shadow->getLocation(); | ||||||||||
13326 | |||||||||||
13327 | // FIXME: Add a new kind of DeclarationName for an inherited constructor. | ||||||||||
13328 | // For now we use the name of the base class constructor as a member of the | ||||||||||
13329 | // derived class to indicate a (fake) inherited constructor name. | ||||||||||
13330 | DeclarationName Name = BaseCtor->getDeclName(); | ||||||||||
13331 | |||||||||||
13332 | // Check to see if we already have a fake constructor for this inherited | ||||||||||
13333 | // constructor call. | ||||||||||
13334 | for (NamedDecl *Ctor : Derived->lookup(Name)) | ||||||||||
13335 | if (declaresSameEntity(cast<CXXConstructorDecl>(Ctor) | ||||||||||
13336 | ->getInheritedConstructor() | ||||||||||
13337 | .getConstructor(), | ||||||||||
13338 | BaseCtor)) | ||||||||||
13339 | return cast<CXXConstructorDecl>(Ctor); | ||||||||||
13340 | |||||||||||
13341 | DeclarationNameInfo NameInfo(Name, UsingLoc); | ||||||||||
13342 | TypeSourceInfo *TInfo = | ||||||||||
13343 | Context.getTrivialTypeSourceInfo(BaseCtor->getType(), UsingLoc); | ||||||||||
13344 | FunctionProtoTypeLoc ProtoLoc = | ||||||||||
13345 | TInfo->getTypeLoc().IgnoreParens().castAs<FunctionProtoTypeLoc>(); | ||||||||||
13346 | |||||||||||
13347 | // Check the inherited constructor is valid and find the list of base classes | ||||||||||
13348 | // from which it was inherited. | ||||||||||
13349 | InheritedConstructorInfo ICI(*this, Loc, Shadow); | ||||||||||
13350 | |||||||||||
13351 | bool Constexpr = | ||||||||||
13352 | BaseCtor->isConstexpr() && | ||||||||||
13353 | defaultedSpecialMemberIsConstexpr(*this, Derived, CXXDefaultConstructor, | ||||||||||
13354 | false, BaseCtor, &ICI); | ||||||||||
13355 | |||||||||||
13356 | CXXConstructorDecl *DerivedCtor = CXXConstructorDecl::Create( | ||||||||||
13357 | Context, Derived, UsingLoc, NameInfo, TInfo->getType(), TInfo, | ||||||||||
13358 | BaseCtor->getExplicitSpecifier(), /*isInline=*/true, | ||||||||||
13359 | /*isImplicitlyDeclared=*/true, | ||||||||||
13360 | Constexpr ? BaseCtor->getConstexprKind() : ConstexprSpecKind::Unspecified, | ||||||||||
13361 | InheritedConstructor(Shadow, BaseCtor), | ||||||||||
13362 | BaseCtor->getTrailingRequiresClause()); | ||||||||||
13363 | if (Shadow->isInvalidDecl()) | ||||||||||
13364 | DerivedCtor->setInvalidDecl(); | ||||||||||
13365 | |||||||||||
13366 | // Build an unevaluated exception specification for this fake constructor. | ||||||||||
13367 | const FunctionProtoType *FPT = TInfo->getType()->castAs<FunctionProtoType>(); | ||||||||||
13368 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||||||||
13369 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||||||
13370 | EPI.ExceptionSpec.SourceDecl = DerivedCtor; | ||||||||||
13371 | DerivedCtor->setType(Context.getFunctionType(FPT->getReturnType(), | ||||||||||
13372 | FPT->getParamTypes(), EPI)); | ||||||||||
13373 | |||||||||||
13374 | // Build the parameter declarations. | ||||||||||
13375 | SmallVector<ParmVarDecl *, 16> ParamDecls; | ||||||||||
13376 | for (unsigned I = 0, N = FPT->getNumParams(); I != N; ++I) { | ||||||||||
13377 | TypeSourceInfo *TInfo = | ||||||||||
13378 | Context.getTrivialTypeSourceInfo(FPT->getParamType(I), UsingLoc); | ||||||||||
13379 | ParmVarDecl *PD = ParmVarDecl::Create( | ||||||||||
13380 | Context, DerivedCtor, UsingLoc, UsingLoc, /*IdentifierInfo=*/nullptr, | ||||||||||
13381 | FPT->getParamType(I), TInfo, SC_None, /*DefArg=*/nullptr); | ||||||||||
13382 | PD->setScopeInfo(0, I); | ||||||||||
13383 | PD->setImplicit(); | ||||||||||
13384 | // Ensure attributes are propagated onto parameters (this matters for | ||||||||||
13385 | // format, pass_object_size, ...). | ||||||||||
13386 | mergeDeclAttributes(PD, BaseCtor->getParamDecl(I)); | ||||||||||
13387 | ParamDecls.push_back(PD); | ||||||||||
13388 | ProtoLoc.setParam(I, PD); | ||||||||||
13389 | } | ||||||||||
13390 | |||||||||||
13391 | // Set up the new constructor. | ||||||||||
13392 | assert(!BaseCtor->isDeleted() && "should not use deleted constructor")(static_cast <bool> (!BaseCtor->isDeleted() && "should not use deleted constructor") ? void (0) : __assert_fail ("!BaseCtor->isDeleted() && \"should not use deleted constructor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13392, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13393 | DerivedCtor->setAccess(BaseCtor->getAccess()); | ||||||||||
13394 | DerivedCtor->setParams(ParamDecls); | ||||||||||
13395 | Derived->addDecl(DerivedCtor); | ||||||||||
13396 | |||||||||||
13397 | if (ShouldDeleteSpecialMember(DerivedCtor, CXXDefaultConstructor, &ICI)) | ||||||||||
13398 | SetDeclDeleted(DerivedCtor, UsingLoc); | ||||||||||
13399 | |||||||||||
13400 | return DerivedCtor; | ||||||||||
13401 | } | ||||||||||
13402 | |||||||||||
13403 | void Sema::NoteDeletedInheritingConstructor(CXXConstructorDecl *Ctor) { | ||||||||||
13404 | InheritedConstructorInfo ICI(*this, Ctor->getLocation(), | ||||||||||
13405 | Ctor->getInheritedConstructor().getShadowDecl()); | ||||||||||
13406 | ShouldDeleteSpecialMember(Ctor, CXXDefaultConstructor, &ICI, | ||||||||||
13407 | /*Diagnose*/true); | ||||||||||
13408 | } | ||||||||||
13409 | |||||||||||
13410 | void Sema::DefineInheritingConstructor(SourceLocation CurrentLocation, | ||||||||||
13411 | CXXConstructorDecl *Constructor) { | ||||||||||
13412 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||||||||
13413 | assert(Constructor->getInheritedConstructor() &&(static_cast <bool> (Constructor->getInheritedConstructor () && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) ? void (0) : __assert_fail ("Constructor->getInheritedConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13415, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13414 | !Constructor->doesThisDeclarationHaveABody() &&(static_cast <bool> (Constructor->getInheritedConstructor () && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) ? void (0) : __assert_fail ("Constructor->getInheritedConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13415, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13415 | !Constructor->isDeleted())(static_cast <bool> (Constructor->getInheritedConstructor () && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) ? void (0) : __assert_fail ("Constructor->getInheritedConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13415, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13416 | if (Constructor->willHaveBody() || Constructor->isInvalidDecl()) | ||||||||||
13417 | return; | ||||||||||
13418 | |||||||||||
13419 | // Initializations are performed "as if by a defaulted default constructor", | ||||||||||
13420 | // so enter the appropriate scope. | ||||||||||
13421 | SynthesizedFunctionScope Scope(*this, Constructor); | ||||||||||
13422 | |||||||||||
13423 | // The exception specification is needed because we are defining the | ||||||||||
13424 | // function. | ||||||||||
13425 | ResolveExceptionSpec(CurrentLocation, | ||||||||||
13426 | Constructor->getType()->castAs<FunctionProtoType>()); | ||||||||||
13427 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||||||
13428 | |||||||||||
13429 | // Add a context note for diagnostics produced after this point. | ||||||||||
13430 | Scope.addContextNote(CurrentLocation); | ||||||||||
13431 | |||||||||||
13432 | ConstructorUsingShadowDecl *Shadow = | ||||||||||
13433 | Constructor->getInheritedConstructor().getShadowDecl(); | ||||||||||
13434 | CXXConstructorDecl *InheritedCtor = | ||||||||||
13435 | Constructor->getInheritedConstructor().getConstructor(); | ||||||||||
13436 | |||||||||||
13437 | // [class.inhctor.init]p1: | ||||||||||
13438 | // initialization proceeds as if a defaulted default constructor is used to | ||||||||||
13439 | // initialize the D object and each base class subobject from which the | ||||||||||
13440 | // constructor was inherited | ||||||||||
13441 | |||||||||||
13442 | InheritedConstructorInfo ICI(*this, CurrentLocation, Shadow); | ||||||||||
13443 | CXXRecordDecl *RD = Shadow->getParent(); | ||||||||||
13444 | SourceLocation InitLoc = Shadow->getLocation(); | ||||||||||
13445 | |||||||||||
13446 | // Build explicit initializers for all base classes from which the | ||||||||||
13447 | // constructor was inherited. | ||||||||||
13448 | SmallVector<CXXCtorInitializer*, 8> Inits; | ||||||||||
13449 | for (bool VBase : {false, true}) { | ||||||||||
13450 | for (CXXBaseSpecifier &B : VBase ? RD->vbases() : RD->bases()) { | ||||||||||
13451 | if (B.isVirtual() != VBase) | ||||||||||
13452 | continue; | ||||||||||
13453 | |||||||||||
13454 | auto *BaseRD = B.getType()->getAsCXXRecordDecl(); | ||||||||||
13455 | if (!BaseRD) | ||||||||||
13456 | continue; | ||||||||||
13457 | |||||||||||
13458 | auto BaseCtor = ICI.findConstructorForBase(BaseRD, InheritedCtor); | ||||||||||
13459 | if (!BaseCtor.first) | ||||||||||
13460 | continue; | ||||||||||
13461 | |||||||||||
13462 | MarkFunctionReferenced(CurrentLocation, BaseCtor.first); | ||||||||||
13463 | ExprResult Init = new (Context) CXXInheritedCtorInitExpr( | ||||||||||
13464 | InitLoc, B.getType(), BaseCtor.first, VBase, BaseCtor.second); | ||||||||||
13465 | |||||||||||
13466 | auto *TInfo = Context.getTrivialTypeSourceInfo(B.getType(), InitLoc); | ||||||||||
13467 | Inits.push_back(new (Context) CXXCtorInitializer( | ||||||||||
13468 | Context, TInfo, VBase, InitLoc, Init.get(), InitLoc, | ||||||||||
13469 | SourceLocation())); | ||||||||||
13470 | } | ||||||||||
13471 | } | ||||||||||
13472 | |||||||||||
13473 | // We now proceed as if for a defaulted default constructor, with the relevant | ||||||||||
13474 | // initializers replaced. | ||||||||||
13475 | |||||||||||
13476 | if (SetCtorInitializers(Constructor, /*AnyErrors*/false, Inits)) { | ||||||||||
13477 | Constructor->setInvalidDecl(); | ||||||||||
13478 | return; | ||||||||||
13479 | } | ||||||||||
13480 | |||||||||||
13481 | Constructor->setBody(new (Context) CompoundStmt(InitLoc)); | ||||||||||
13482 | Constructor->markUsed(Context); | ||||||||||
13483 | |||||||||||
13484 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
13485 | L->CompletedImplicitDefinition(Constructor); | ||||||||||
13486 | } | ||||||||||
13487 | |||||||||||
13488 | DiagnoseUninitializedFields(*this, Constructor); | ||||||||||
13489 | } | ||||||||||
13490 | |||||||||||
13491 | CXXDestructorDecl *Sema::DeclareImplicitDestructor(CXXRecordDecl *ClassDecl) { | ||||||||||
13492 | // C++ [class.dtor]p2: | ||||||||||
13493 | // If a class has no user-declared destructor, a destructor is | ||||||||||
13494 | // declared implicitly. An implicitly-declared destructor is an | ||||||||||
13495 | // inline public member of its class. | ||||||||||
13496 | assert(ClassDecl->needsImplicitDestructor())(static_cast <bool> (ClassDecl->needsImplicitDestructor ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitDestructor()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13496, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13497 | |||||||||||
13498 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXDestructor); | ||||||||||
13499 | if (DSM.isAlreadyBeingDeclared()) | ||||||||||
13500 | return nullptr; | ||||||||||
13501 | |||||||||||
13502 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||||||
13503 | CXXDestructor, | ||||||||||
13504 | false); | ||||||||||
13505 | |||||||||||
13506 | // Create the actual destructor declaration. | ||||||||||
13507 | CanQualType ClassType | ||||||||||
13508 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||||||||
13509 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||||||
13510 | DeclarationName Name | ||||||||||
13511 | = Context.DeclarationNames.getCXXDestructorName(ClassType); | ||||||||||
13512 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||||||
13513 | CXXDestructorDecl *Destructor = | ||||||||||
13514 | CXXDestructorDecl::Create(Context, ClassDecl, ClassLoc, NameInfo, | ||||||||||
13515 | QualType(), nullptr, /*isInline=*/true, | ||||||||||
13516 | /*isImplicitlyDeclared=*/true, | ||||||||||
13517 | Constexpr ? ConstexprSpecKind::Constexpr | ||||||||||
13518 | : ConstexprSpecKind::Unspecified); | ||||||||||
13519 | Destructor->setAccess(AS_public); | ||||||||||
13520 | Destructor->setDefaulted(); | ||||||||||
13521 | |||||||||||
13522 | if (getLangOpts().CUDA) { | ||||||||||
13523 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXDestructor, | ||||||||||
13524 | Destructor, | ||||||||||
13525 | /* ConstRHS */ false, | ||||||||||
13526 | /* Diagnose */ false); | ||||||||||
13527 | } | ||||||||||
13528 | |||||||||||
13529 | setupImplicitSpecialMemberType(Destructor, Context.VoidTy, None); | ||||||||||
13530 | |||||||||||
13531 | // We don't need to use SpecialMemberIsTrivial here; triviality for | ||||||||||
13532 | // destructors is easy to compute. | ||||||||||
13533 | Destructor->setTrivial(ClassDecl->hasTrivialDestructor()); | ||||||||||
13534 | Destructor->setTrivialForCall(ClassDecl->hasAttr<TrivialABIAttr>() || | ||||||||||
13535 | ClassDecl->hasTrivialDestructorForCall()); | ||||||||||
13536 | |||||||||||
13537 | // Note that we have declared this destructor. | ||||||||||
13538 | ++getASTContext().NumImplicitDestructorsDeclared; | ||||||||||
13539 | |||||||||||
13540 | Scope *S = getScopeForContext(ClassDecl); | ||||||||||
13541 | CheckImplicitSpecialMemberDeclaration(S, Destructor); | ||||||||||
13542 | |||||||||||
13543 | // We can't check whether an implicit destructor is deleted before we complete | ||||||||||
13544 | // the definition of the class, because its validity depends on the alignment | ||||||||||
13545 | // of the class. We'll check this from ActOnFields once the class is complete. | ||||||||||
13546 | if (ClassDecl->isCompleteDefinition() && | ||||||||||
13547 | ShouldDeleteSpecialMember(Destructor, CXXDestructor)) | ||||||||||
13548 | SetDeclDeleted(Destructor, ClassLoc); | ||||||||||
13549 | |||||||||||
13550 | // Introduce this destructor into its scope. | ||||||||||
13551 | if (S) | ||||||||||
13552 | PushOnScopeChains(Destructor, S, false); | ||||||||||
13553 | ClassDecl->addDecl(Destructor); | ||||||||||
13554 | |||||||||||
13555 | return Destructor; | ||||||||||
13556 | } | ||||||||||
13557 | |||||||||||
13558 | void Sema::DefineImplicitDestructor(SourceLocation CurrentLocation, | ||||||||||
13559 | CXXDestructorDecl *Destructor) { | ||||||||||
13560 | assert((Destructor->isDefaulted() &&(static_cast <bool> ((Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor ->isDeleted()) && "DefineImplicitDestructor - call it for implicit default dtor" ) ? void (0) : __assert_fail ("(Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor->isDeleted()) && \"DefineImplicitDestructor - call it for implicit default dtor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13563, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13561 | !Destructor->doesThisDeclarationHaveABody() &&(static_cast <bool> ((Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor ->isDeleted()) && "DefineImplicitDestructor - call it for implicit default dtor" ) ? void (0) : __assert_fail ("(Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor->isDeleted()) && \"DefineImplicitDestructor - call it for implicit default dtor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13563, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13562 | !Destructor->isDeleted()) &&(static_cast <bool> ((Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor ->isDeleted()) && "DefineImplicitDestructor - call it for implicit default dtor" ) ? void (0) : __assert_fail ("(Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor->isDeleted()) && \"DefineImplicitDestructor - call it for implicit default dtor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13563, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13563 | "DefineImplicitDestructor - call it for implicit default dtor")(static_cast <bool> ((Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor ->isDeleted()) && "DefineImplicitDestructor - call it for implicit default dtor" ) ? void (0) : __assert_fail ("(Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor->isDeleted()) && \"DefineImplicitDestructor - call it for implicit default dtor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13563, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13564 | if (Destructor->willHaveBody() || Destructor->isInvalidDecl()) | ||||||||||
13565 | return; | ||||||||||
13566 | |||||||||||
13567 | CXXRecordDecl *ClassDecl = Destructor->getParent(); | ||||||||||
13568 | assert(ClassDecl && "DefineImplicitDestructor - invalid destructor")(static_cast <bool> (ClassDecl && "DefineImplicitDestructor - invalid destructor" ) ? void (0) : __assert_fail ("ClassDecl && \"DefineImplicitDestructor - invalid destructor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13568, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13569 | |||||||||||
13570 | SynthesizedFunctionScope Scope(*this, Destructor); | ||||||||||
13571 | |||||||||||
13572 | // The exception specification is needed because we are defining the | ||||||||||
13573 | // function. | ||||||||||
13574 | ResolveExceptionSpec(CurrentLocation, | ||||||||||
13575 | Destructor->getType()->castAs<FunctionProtoType>()); | ||||||||||
13576 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||||||
13577 | |||||||||||
13578 | // Add a context note for diagnostics produced after this point. | ||||||||||
13579 | Scope.addContextNote(CurrentLocation); | ||||||||||
13580 | |||||||||||
13581 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), | ||||||||||
13582 | Destructor->getParent()); | ||||||||||
13583 | |||||||||||
13584 | if (CheckDestructor(Destructor)) { | ||||||||||
13585 | Destructor->setInvalidDecl(); | ||||||||||
13586 | return; | ||||||||||
13587 | } | ||||||||||
13588 | |||||||||||
13589 | SourceLocation Loc = Destructor->getEndLoc().isValid() | ||||||||||
13590 | ? Destructor->getEndLoc() | ||||||||||
13591 | : Destructor->getLocation(); | ||||||||||
13592 | Destructor->setBody(new (Context) CompoundStmt(Loc)); | ||||||||||
13593 | Destructor->markUsed(Context); | ||||||||||
13594 | |||||||||||
13595 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
13596 | L->CompletedImplicitDefinition(Destructor); | ||||||||||
13597 | } | ||||||||||
13598 | } | ||||||||||
13599 | |||||||||||
13600 | void Sema::CheckCompleteDestructorVariant(SourceLocation CurrentLocation, | ||||||||||
13601 | CXXDestructorDecl *Destructor) { | ||||||||||
13602 | if (Destructor->isInvalidDecl()) | ||||||||||
13603 | return; | ||||||||||
13604 | |||||||||||
13605 | CXXRecordDecl *ClassDecl = Destructor->getParent(); | ||||||||||
13606 | assert(Context.getTargetInfo().getCXXABI().isMicrosoft() &&(static_cast <bool> (Context.getTargetInfo().getCXXABI( ).isMicrosoft() && "implicit complete dtors unneeded outside MS ABI" ) ? void (0) : __assert_fail ("Context.getTargetInfo().getCXXABI().isMicrosoft() && \"implicit complete dtors unneeded outside MS ABI\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13607, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13607 | "implicit complete dtors unneeded outside MS ABI")(static_cast <bool> (Context.getTargetInfo().getCXXABI( ).isMicrosoft() && "implicit complete dtors unneeded outside MS ABI" ) ? void (0) : __assert_fail ("Context.getTargetInfo().getCXXABI().isMicrosoft() && \"implicit complete dtors unneeded outside MS ABI\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13607, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13608 | assert(ClassDecl->getNumVBases() > 0 &&(static_cast <bool> (ClassDecl->getNumVBases() > 0 && "complete dtor only exists for classes with vbases" ) ? void (0) : __assert_fail ("ClassDecl->getNumVBases() > 0 && \"complete dtor only exists for classes with vbases\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13609, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13609 | "complete dtor only exists for classes with vbases")(static_cast <bool> (ClassDecl->getNumVBases() > 0 && "complete dtor only exists for classes with vbases" ) ? void (0) : __assert_fail ("ClassDecl->getNumVBases() > 0 && \"complete dtor only exists for classes with vbases\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13609, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13610 | |||||||||||
13611 | SynthesizedFunctionScope Scope(*this, Destructor); | ||||||||||
13612 | |||||||||||
13613 | // Add a context note for diagnostics produced after this point. | ||||||||||
13614 | Scope.addContextNote(CurrentLocation); | ||||||||||
13615 | |||||||||||
13616 | MarkVirtualBaseDestructorsReferenced(Destructor->getLocation(), ClassDecl); | ||||||||||
13617 | } | ||||||||||
13618 | |||||||||||
13619 | /// Perform any semantic analysis which needs to be delayed until all | ||||||||||
13620 | /// pending class member declarations have been parsed. | ||||||||||
13621 | void Sema::ActOnFinishCXXMemberDecls() { | ||||||||||
13622 | // If the context is an invalid C++ class, just suppress these checks. | ||||||||||
13623 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(CurContext)) { | ||||||||||
13624 | if (Record->isInvalidDecl()) { | ||||||||||
13625 | DelayedOverridingExceptionSpecChecks.clear(); | ||||||||||
13626 | DelayedEquivalentExceptionSpecChecks.clear(); | ||||||||||
13627 | return; | ||||||||||
13628 | } | ||||||||||
13629 | checkForMultipleExportedDefaultConstructors(*this, Record); | ||||||||||
13630 | } | ||||||||||
13631 | } | ||||||||||
13632 | |||||||||||
13633 | void Sema::ActOnFinishCXXNonNestedClass() { | ||||||||||
13634 | referenceDLLExportedClassMethods(); | ||||||||||
13635 | |||||||||||
13636 | if (!DelayedDllExportMemberFunctions.empty()) { | ||||||||||
13637 | SmallVector<CXXMethodDecl*, 4> WorkList; | ||||||||||
13638 | std::swap(DelayedDllExportMemberFunctions, WorkList); | ||||||||||
13639 | for (CXXMethodDecl *M : WorkList) { | ||||||||||
13640 | DefineDefaultedFunction(*this, M, M->getLocation()); | ||||||||||
13641 | |||||||||||
13642 | // Pass the method to the consumer to get emitted. This is not necessary | ||||||||||
13643 | // for explicit instantiation definitions, as they will get emitted | ||||||||||
13644 | // anyway. | ||||||||||
13645 | if (M->getParent()->getTemplateSpecializationKind() != | ||||||||||
13646 | TSK_ExplicitInstantiationDefinition) | ||||||||||
13647 | ActOnFinishInlineFunctionDef(M); | ||||||||||
13648 | } | ||||||||||
13649 | } | ||||||||||
13650 | } | ||||||||||
13651 | |||||||||||
13652 | void Sema::referenceDLLExportedClassMethods() { | ||||||||||
13653 | if (!DelayedDllExportClasses.empty()) { | ||||||||||
13654 | // Calling ReferenceDllExportedMembers might cause the current function to | ||||||||||
13655 | // be called again, so use a local copy of DelayedDllExportClasses. | ||||||||||
13656 | SmallVector<CXXRecordDecl *, 4> WorkList; | ||||||||||
13657 | std::swap(DelayedDllExportClasses, WorkList); | ||||||||||
13658 | for (CXXRecordDecl *Class : WorkList) | ||||||||||
13659 | ReferenceDllExportedMembers(*this, Class); | ||||||||||
13660 | } | ||||||||||
13661 | } | ||||||||||
13662 | |||||||||||
13663 | void Sema::AdjustDestructorExceptionSpec(CXXDestructorDecl *Destructor) { | ||||||||||
13664 | assert(getLangOpts().CPlusPlus11 &&(static_cast <bool> (getLangOpts().CPlusPlus11 && "adjusting dtor exception specs was introduced in c++11") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus11 && \"adjusting dtor exception specs was introduced in c++11\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13665, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
13665 | "adjusting dtor exception specs was introduced in c++11")(static_cast <bool> (getLangOpts().CPlusPlus11 && "adjusting dtor exception specs was introduced in c++11") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus11 && \"adjusting dtor exception specs was introduced in c++11\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13665, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13666 | |||||||||||
13667 | if (Destructor->isDependentContext()) | ||||||||||
13668 | return; | ||||||||||
13669 | |||||||||||
13670 | // C++11 [class.dtor]p3: | ||||||||||
13671 | // A declaration of a destructor that does not have an exception- | ||||||||||
13672 | // specification is implicitly considered to have the same exception- | ||||||||||
13673 | // specification as an implicit declaration. | ||||||||||
13674 | const auto *DtorType = Destructor->getType()->castAs<FunctionProtoType>(); | ||||||||||
13675 | if (DtorType->hasExceptionSpec()) | ||||||||||
13676 | return; | ||||||||||
13677 | |||||||||||
13678 | // Replace the destructor's type, building off the existing one. Fortunately, | ||||||||||
13679 | // the only thing of interest in the destructor type is its extended info. | ||||||||||
13680 | // The return and arguments are fixed. | ||||||||||
13681 | FunctionProtoType::ExtProtoInfo EPI = DtorType->getExtProtoInfo(); | ||||||||||
13682 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||||||
13683 | EPI.ExceptionSpec.SourceDecl = Destructor; | ||||||||||
13684 | Destructor->setType(Context.getFunctionType(Context.VoidTy, None, EPI)); | ||||||||||
13685 | |||||||||||
13686 | // FIXME: If the destructor has a body that could throw, and the newly created | ||||||||||
13687 | // spec doesn't allow exceptions, we should emit a warning, because this | ||||||||||
13688 | // change in behavior can break conforming C++03 programs at runtime. | ||||||||||
13689 | // However, we don't have a body or an exception specification yet, so it | ||||||||||
13690 | // needs to be done somewhere else. | ||||||||||
13691 | } | ||||||||||
13692 | |||||||||||
13693 | namespace { | ||||||||||
13694 | /// An abstract base class for all helper classes used in building the | ||||||||||
13695 | // copy/move operators. These classes serve as factory functions and help us | ||||||||||
13696 | // avoid using the same Expr* in the AST twice. | ||||||||||
13697 | class ExprBuilder { | ||||||||||
13698 | ExprBuilder(const ExprBuilder&) = delete; | ||||||||||
13699 | ExprBuilder &operator=(const ExprBuilder&) = delete; | ||||||||||
13700 | |||||||||||
13701 | protected: | ||||||||||
13702 | static Expr *assertNotNull(Expr *E) { | ||||||||||
13703 | assert(E && "Expression construction must not fail.")(static_cast <bool> (E && "Expression construction must not fail." ) ? void (0) : __assert_fail ("E && \"Expression construction must not fail.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13703, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13704 | return E; | ||||||||||
13705 | } | ||||||||||
13706 | |||||||||||
13707 | public: | ||||||||||
13708 | ExprBuilder() {} | ||||||||||
13709 | virtual ~ExprBuilder() {} | ||||||||||
13710 | |||||||||||
13711 | virtual Expr *build(Sema &S, SourceLocation Loc) const = 0; | ||||||||||
13712 | }; | ||||||||||
13713 | |||||||||||
13714 | class RefBuilder: public ExprBuilder { | ||||||||||
13715 | VarDecl *Var; | ||||||||||
13716 | QualType VarType; | ||||||||||
13717 | |||||||||||
13718 | public: | ||||||||||
13719 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||||||
13720 | return assertNotNull(S.BuildDeclRefExpr(Var, VarType, VK_LValue, Loc)); | ||||||||||
13721 | } | ||||||||||
13722 | |||||||||||
13723 | RefBuilder(VarDecl *Var, QualType VarType) | ||||||||||
13724 | : Var(Var), VarType(VarType) {} | ||||||||||
13725 | }; | ||||||||||
13726 | |||||||||||
13727 | class ThisBuilder: public ExprBuilder { | ||||||||||
13728 | public: | ||||||||||
13729 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||||||
13730 | return assertNotNull(S.ActOnCXXThis(Loc).getAs<Expr>()); | ||||||||||
13731 | } | ||||||||||
13732 | }; | ||||||||||
13733 | |||||||||||
13734 | class CastBuilder: public ExprBuilder { | ||||||||||
13735 | const ExprBuilder &Builder; | ||||||||||
13736 | QualType Type; | ||||||||||
13737 | ExprValueKind Kind; | ||||||||||
13738 | const CXXCastPath &Path; | ||||||||||
13739 | |||||||||||
13740 | public: | ||||||||||
13741 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||||||
13742 | return assertNotNull(S.ImpCastExprToType(Builder.build(S, Loc), Type, | ||||||||||
13743 | CK_UncheckedDerivedToBase, Kind, | ||||||||||
13744 | &Path).get()); | ||||||||||
13745 | } | ||||||||||
13746 | |||||||||||
13747 | CastBuilder(const ExprBuilder &Builder, QualType Type, ExprValueKind Kind, | ||||||||||
13748 | const CXXCastPath &Path) | ||||||||||
13749 | : Builder(Builder), Type(Type), Kind(Kind), Path(Path) {} | ||||||||||
13750 | }; | ||||||||||
13751 | |||||||||||
13752 | class DerefBuilder: public ExprBuilder { | ||||||||||
13753 | const ExprBuilder &Builder; | ||||||||||
13754 | |||||||||||
13755 | public: | ||||||||||
13756 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||||||
13757 | return assertNotNull( | ||||||||||
13758 | S.CreateBuiltinUnaryOp(Loc, UO_Deref, Builder.build(S, Loc)).get()); | ||||||||||
13759 | } | ||||||||||
13760 | |||||||||||
13761 | DerefBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||||||||
13762 | }; | ||||||||||
13763 | |||||||||||
13764 | class MemberBuilder: public ExprBuilder { | ||||||||||
13765 | const ExprBuilder &Builder; | ||||||||||
13766 | QualType Type; | ||||||||||
13767 | CXXScopeSpec SS; | ||||||||||
13768 | bool IsArrow; | ||||||||||
13769 | LookupResult &MemberLookup; | ||||||||||
13770 | |||||||||||
13771 | public: | ||||||||||
13772 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||||||
13773 | return assertNotNull(S.BuildMemberReferenceExpr( | ||||||||||
13774 | Builder.build(S, Loc), Type, Loc, IsArrow, SS, SourceLocation(), | ||||||||||
13775 | nullptr, MemberLookup, nullptr, nullptr).get()); | ||||||||||
13776 | } | ||||||||||
13777 | |||||||||||
13778 | MemberBuilder(const ExprBuilder &Builder, QualType Type, bool IsArrow, | ||||||||||
13779 | LookupResult &MemberLookup) | ||||||||||
13780 | : Builder(Builder), Type(Type), IsArrow(IsArrow), | ||||||||||
13781 | MemberLookup(MemberLookup) {} | ||||||||||
13782 | }; | ||||||||||
13783 | |||||||||||
13784 | class MoveCastBuilder: public ExprBuilder { | ||||||||||
13785 | const ExprBuilder &Builder; | ||||||||||
13786 | |||||||||||
13787 | public: | ||||||||||
13788 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||||||
13789 | return assertNotNull(CastForMoving(S, Builder.build(S, Loc))); | ||||||||||
13790 | } | ||||||||||
13791 | |||||||||||
13792 | MoveCastBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||||||||
13793 | }; | ||||||||||
13794 | |||||||||||
13795 | class LvalueConvBuilder: public ExprBuilder { | ||||||||||
13796 | const ExprBuilder &Builder; | ||||||||||
13797 | |||||||||||
13798 | public: | ||||||||||
13799 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||||||
13800 | return assertNotNull( | ||||||||||
13801 | S.DefaultLvalueConversion(Builder.build(S, Loc)).get()); | ||||||||||
13802 | } | ||||||||||
13803 | |||||||||||
13804 | LvalueConvBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||||||||
13805 | }; | ||||||||||
13806 | |||||||||||
13807 | class SubscriptBuilder: public ExprBuilder { | ||||||||||
13808 | const ExprBuilder &Base; | ||||||||||
13809 | const ExprBuilder &Index; | ||||||||||
13810 | |||||||||||
13811 | public: | ||||||||||
13812 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||||||
13813 | return assertNotNull(S.CreateBuiltinArraySubscriptExpr( | ||||||||||
13814 | Base.build(S, Loc), Loc, Index.build(S, Loc), Loc).get()); | ||||||||||
13815 | } | ||||||||||
13816 | |||||||||||
13817 | SubscriptBuilder(const ExprBuilder &Base, const ExprBuilder &Index) | ||||||||||
13818 | : Base(Base), Index(Index) {} | ||||||||||
13819 | }; | ||||||||||
13820 | |||||||||||
13821 | } // end anonymous namespace | ||||||||||
13822 | |||||||||||
13823 | /// When generating a defaulted copy or move assignment operator, if a field | ||||||||||
13824 | /// should be copied with __builtin_memcpy rather than via explicit assignments, | ||||||||||
13825 | /// do so. This optimization only applies for arrays of scalars, and for arrays | ||||||||||
13826 | /// of class type where the selected copy/move-assignment operator is trivial. | ||||||||||
13827 | static StmtResult | ||||||||||
13828 | buildMemcpyForAssignmentOp(Sema &S, SourceLocation Loc, QualType T, | ||||||||||
13829 | const ExprBuilder &ToB, const ExprBuilder &FromB) { | ||||||||||
13830 | // Compute the size of the memory buffer to be copied. | ||||||||||
13831 | QualType SizeType = S.Context.getSizeType(); | ||||||||||
13832 | llvm::APInt Size(S.Context.getTypeSize(SizeType), | ||||||||||
13833 | S.Context.getTypeSizeInChars(T).getQuantity()); | ||||||||||
13834 | |||||||||||
13835 | // Take the address of the field references for "from" and "to". We | ||||||||||
13836 | // directly construct UnaryOperators here because semantic analysis | ||||||||||
13837 | // does not permit us to take the address of an xvalue. | ||||||||||
13838 | Expr *From = FromB.build(S, Loc); | ||||||||||
13839 | From = UnaryOperator::Create( | ||||||||||
13840 | S.Context, From, UO_AddrOf, S.Context.getPointerType(From->getType()), | ||||||||||
13841 | VK_PRValue, OK_Ordinary, Loc, false, S.CurFPFeatureOverrides()); | ||||||||||
13842 | Expr *To = ToB.build(S, Loc); | ||||||||||
13843 | To = UnaryOperator::Create( | ||||||||||
13844 | S.Context, To, UO_AddrOf, S.Context.getPointerType(To->getType()), | ||||||||||
13845 | VK_PRValue, OK_Ordinary, Loc, false, S.CurFPFeatureOverrides()); | ||||||||||
13846 | |||||||||||
13847 | const Type *E = T->getBaseElementTypeUnsafe(); | ||||||||||
13848 | bool NeedsCollectableMemCpy = | ||||||||||
13849 | E->isRecordType() && | ||||||||||
13850 | E->castAs<RecordType>()->getDecl()->hasObjectMember(); | ||||||||||
13851 | |||||||||||
13852 | // Create a reference to the __builtin_objc_memmove_collectable function | ||||||||||
13853 | StringRef MemCpyName = NeedsCollectableMemCpy ? | ||||||||||
13854 | "__builtin_objc_memmove_collectable" : | ||||||||||
13855 | "__builtin_memcpy"; | ||||||||||
13856 | LookupResult R(S, &S.Context.Idents.get(MemCpyName), Loc, | ||||||||||
13857 | Sema::LookupOrdinaryName); | ||||||||||
13858 | S.LookupName(R, S.TUScope, true); | ||||||||||
13859 | |||||||||||
13860 | FunctionDecl *MemCpy = R.getAsSingle<FunctionDecl>(); | ||||||||||
13861 | if (!MemCpy) | ||||||||||
13862 | // Something went horribly wrong earlier, and we will have complained | ||||||||||
13863 | // about it. | ||||||||||
13864 | return StmtError(); | ||||||||||
13865 | |||||||||||
13866 | ExprResult MemCpyRef = S.BuildDeclRefExpr(MemCpy, S.Context.BuiltinFnTy, | ||||||||||
13867 | VK_PRValue, Loc, nullptr); | ||||||||||
13868 | assert(MemCpyRef.isUsable() && "Builtin reference cannot fail")(static_cast <bool> (MemCpyRef.isUsable() && "Builtin reference cannot fail" ) ? void (0) : __assert_fail ("MemCpyRef.isUsable() && \"Builtin reference cannot fail\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13868, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13869 | |||||||||||
13870 | Expr *CallArgs[] = { | ||||||||||
13871 | To, From, IntegerLiteral::Create(S.Context, Size, SizeType, Loc) | ||||||||||
13872 | }; | ||||||||||
13873 | ExprResult Call = S.BuildCallExpr(/*Scope=*/nullptr, MemCpyRef.get(), | ||||||||||
13874 | Loc, CallArgs, Loc); | ||||||||||
13875 | |||||||||||
13876 | assert(!Call.isInvalid() && "Call to __builtin_memcpy cannot fail!")(static_cast <bool> (!Call.isInvalid() && "Call to __builtin_memcpy cannot fail!" ) ? void (0) : __assert_fail ("!Call.isInvalid() && \"Call to __builtin_memcpy cannot fail!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 13876, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
13877 | return Call.getAs<Stmt>(); | ||||||||||
13878 | } | ||||||||||
13879 | |||||||||||
13880 | /// Builds a statement that copies/moves the given entity from \p From to | ||||||||||
13881 | /// \c To. | ||||||||||
13882 | /// | ||||||||||
13883 | /// This routine is used to copy/move the members of a class with an | ||||||||||
13884 | /// implicitly-declared copy/move assignment operator. When the entities being | ||||||||||
13885 | /// copied are arrays, this routine builds for loops to copy them. | ||||||||||
13886 | /// | ||||||||||
13887 | /// \param S The Sema object used for type-checking. | ||||||||||
13888 | /// | ||||||||||
13889 | /// \param Loc The location where the implicit copy/move is being generated. | ||||||||||
13890 | /// | ||||||||||
13891 | /// \param T The type of the expressions being copied/moved. Both expressions | ||||||||||
13892 | /// must have this type. | ||||||||||
13893 | /// | ||||||||||
13894 | /// \param To The expression we are copying/moving to. | ||||||||||
13895 | /// | ||||||||||
13896 | /// \param From The expression we are copying/moving from. | ||||||||||
13897 | /// | ||||||||||
13898 | /// \param CopyingBaseSubobject Whether we're copying/moving a base subobject. | ||||||||||
13899 | /// Otherwise, it's a non-static member subobject. | ||||||||||
13900 | /// | ||||||||||
13901 | /// \param Copying Whether we're copying or moving. | ||||||||||
13902 | /// | ||||||||||
13903 | /// \param Depth Internal parameter recording the depth of the recursion. | ||||||||||
13904 | /// | ||||||||||
13905 | /// \returns A statement or a loop that copies the expressions, or StmtResult(0) | ||||||||||
13906 | /// if a memcpy should be used instead. | ||||||||||
13907 | static StmtResult | ||||||||||
13908 | buildSingleCopyAssignRecursively(Sema &S, SourceLocation Loc, QualType T, | ||||||||||
13909 | const ExprBuilder &To, const ExprBuilder &From, | ||||||||||
13910 | bool CopyingBaseSubobject, bool Copying, | ||||||||||
13911 | unsigned Depth = 0) { | ||||||||||
13912 | // C++11 [class.copy]p28: | ||||||||||
13913 | // Each subobject is assigned in the manner appropriate to its type: | ||||||||||
13914 | // | ||||||||||
13915 | // - if the subobject is of class type, as if by a call to operator= with | ||||||||||
13916 | // the subobject as the object expression and the corresponding | ||||||||||
13917 | // subobject of x as a single function argument (as if by explicit | ||||||||||
13918 | // qualification; that is, ignoring any possible virtual overriding | ||||||||||
13919 | // functions in more derived classes); | ||||||||||
13920 | // | ||||||||||
13921 | // C++03 [class.copy]p13: | ||||||||||
13922 | // - if the subobject is of class type, the copy assignment operator for | ||||||||||
13923 | // the class is used (as if by explicit qualification; that is, | ||||||||||
13924 | // ignoring any possible virtual overriding functions in more derived | ||||||||||
13925 | // classes); | ||||||||||
13926 | if (const RecordType *RecordTy = T->getAs<RecordType>()) { | ||||||||||
13927 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||||||||
13928 | |||||||||||
13929 | // Look for operator=. | ||||||||||
13930 | DeclarationName Name | ||||||||||
13931 | = S.Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||||||||
13932 | LookupResult OpLookup(S, Name, Loc, Sema::LookupOrdinaryName); | ||||||||||
13933 | S.LookupQualifiedName(OpLookup, ClassDecl, false); | ||||||||||
13934 | |||||||||||
13935 | // Prior to C++11, filter out any result that isn't a copy/move-assignment | ||||||||||
13936 | // operator. | ||||||||||
13937 | if (!S.getLangOpts().CPlusPlus11) { | ||||||||||
13938 | LookupResult::Filter F = OpLookup.makeFilter(); | ||||||||||
13939 | while (F.hasNext()) { | ||||||||||
13940 | NamedDecl *D = F.next(); | ||||||||||
13941 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) | ||||||||||
13942 | if (Method->isCopyAssignmentOperator() || | ||||||||||
13943 | (!Copying && Method->isMoveAssignmentOperator())) | ||||||||||
13944 | continue; | ||||||||||
13945 | |||||||||||
13946 | F.erase(); | ||||||||||
13947 | } | ||||||||||
13948 | F.done(); | ||||||||||
13949 | } | ||||||||||
13950 | |||||||||||
13951 | // Suppress the protected check (C++ [class.protected]) for each of the | ||||||||||
13952 | // assignment operators we found. This strange dance is required when | ||||||||||
13953 | // we're assigning via a base classes's copy-assignment operator. To | ||||||||||
13954 | // ensure that we're getting the right base class subobject (without | ||||||||||
13955 | // ambiguities), we need to cast "this" to that subobject type; to | ||||||||||
13956 | // ensure that we don't go through the virtual call mechanism, we need | ||||||||||
13957 | // to qualify the operator= name with the base class (see below). However, | ||||||||||
13958 | // this means that if the base class has a protected copy assignment | ||||||||||
13959 | // operator, the protected member access check will fail. So, we | ||||||||||
13960 | // rewrite "protected" access to "public" access in this case, since we | ||||||||||
13961 | // know by construction that we're calling from a derived class. | ||||||||||
13962 | if (CopyingBaseSubobject) { | ||||||||||
13963 | for (LookupResult::iterator L = OpLookup.begin(), LEnd = OpLookup.end(); | ||||||||||
13964 | L != LEnd; ++L) { | ||||||||||
13965 | if (L.getAccess() == AS_protected) | ||||||||||
13966 | L.setAccess(AS_public); | ||||||||||
13967 | } | ||||||||||
13968 | } | ||||||||||
13969 | |||||||||||
13970 | // Create the nested-name-specifier that will be used to qualify the | ||||||||||
13971 | // reference to operator=; this is required to suppress the virtual | ||||||||||
13972 | // call mechanism. | ||||||||||
13973 | CXXScopeSpec SS; | ||||||||||
13974 | const Type *CanonicalT = S.Context.getCanonicalType(T.getTypePtr()); | ||||||||||
13975 | SS.MakeTrivial(S.Context, | ||||||||||
13976 | NestedNameSpecifier::Create(S.Context, nullptr, false, | ||||||||||
13977 | CanonicalT), | ||||||||||
13978 | Loc); | ||||||||||
13979 | |||||||||||
13980 | // Create the reference to operator=. | ||||||||||
13981 | ExprResult OpEqualRef | ||||||||||
13982 | = S.BuildMemberReferenceExpr(To.build(S, Loc), T, Loc, /*IsArrow=*/false, | ||||||||||
13983 | SS, /*TemplateKWLoc=*/SourceLocation(), | ||||||||||
13984 | /*FirstQualifierInScope=*/nullptr, | ||||||||||
13985 | OpLookup, | ||||||||||
13986 | /*TemplateArgs=*/nullptr, /*S*/nullptr, | ||||||||||
13987 | /*SuppressQualifierCheck=*/true); | ||||||||||
13988 | if (OpEqualRef.isInvalid()) | ||||||||||
13989 | return StmtError(); | ||||||||||
13990 | |||||||||||
13991 | // Build the call to the assignment operator. | ||||||||||
13992 | |||||||||||
13993 | Expr *FromInst = From.build(S, Loc); | ||||||||||
13994 | ExprResult Call = S.BuildCallToMemberFunction(/*Scope=*/nullptr, | ||||||||||
13995 | OpEqualRef.getAs<Expr>(), | ||||||||||
13996 | Loc, FromInst, Loc); | ||||||||||
13997 | if (Call.isInvalid()) | ||||||||||
13998 | return StmtError(); | ||||||||||
13999 | |||||||||||
14000 | // If we built a call to a trivial 'operator=' while copying an array, | ||||||||||
14001 | // bail out. We'll replace the whole shebang with a memcpy. | ||||||||||
14002 | CXXMemberCallExpr *CE = dyn_cast<CXXMemberCallExpr>(Call.get()); | ||||||||||
14003 | if (CE && CE->getMethodDecl()->isTrivial() && Depth) | ||||||||||
14004 | return StmtResult((Stmt*)nullptr); | ||||||||||
14005 | |||||||||||
14006 | // Convert to an expression-statement, and clean up any produced | ||||||||||
14007 | // temporaries. | ||||||||||
14008 | return S.ActOnExprStmt(Call); | ||||||||||
14009 | } | ||||||||||
14010 | |||||||||||
14011 | // - if the subobject is of scalar type, the built-in assignment | ||||||||||
14012 | // operator is used. | ||||||||||
14013 | const ConstantArrayType *ArrayTy = S.Context.getAsConstantArrayType(T); | ||||||||||
14014 | if (!ArrayTy) { | ||||||||||
14015 | ExprResult Assignment = S.CreateBuiltinBinOp( | ||||||||||
14016 | Loc, BO_Assign, To.build(S, Loc), From.build(S, Loc)); | ||||||||||
14017 | if (Assignment.isInvalid()) | ||||||||||
14018 | return StmtError(); | ||||||||||
14019 | return S.ActOnExprStmt(Assignment); | ||||||||||
14020 | } | ||||||||||
14021 | |||||||||||
14022 | // - if the subobject is an array, each element is assigned, in the | ||||||||||
14023 | // manner appropriate to the element type; | ||||||||||
14024 | |||||||||||
14025 | // Construct a loop over the array bounds, e.g., | ||||||||||
14026 | // | ||||||||||
14027 | // for (__SIZE_TYPE__ i0 = 0; i0 != array-size; ++i0) | ||||||||||
14028 | // | ||||||||||
14029 | // that will copy each of the array elements. | ||||||||||
14030 | QualType SizeType = S.Context.getSizeType(); | ||||||||||
14031 | |||||||||||
14032 | // Create the iteration variable. | ||||||||||
14033 | IdentifierInfo *IterationVarName = nullptr; | ||||||||||
14034 | { | ||||||||||
14035 | SmallString<8> Str; | ||||||||||
14036 | llvm::raw_svector_ostream OS(Str); | ||||||||||
14037 | OS << "__i" << Depth; | ||||||||||
14038 | IterationVarName = &S.Context.Idents.get(OS.str()); | ||||||||||
14039 | } | ||||||||||
14040 | VarDecl *IterationVar = VarDecl::Create(S.Context, S.CurContext, Loc, Loc, | ||||||||||
14041 | IterationVarName, SizeType, | ||||||||||
14042 | S.Context.getTrivialTypeSourceInfo(SizeType, Loc), | ||||||||||
14043 | SC_None); | ||||||||||
14044 | |||||||||||
14045 | // Initialize the iteration variable to zero. | ||||||||||
14046 | llvm::APInt Zero(S.Context.getTypeSize(SizeType), 0); | ||||||||||
14047 | IterationVar->setInit(IntegerLiteral::Create(S.Context, Zero, SizeType, Loc)); | ||||||||||
14048 | |||||||||||
14049 | // Creates a reference to the iteration variable. | ||||||||||
14050 | RefBuilder IterationVarRef(IterationVar, SizeType); | ||||||||||
14051 | LvalueConvBuilder IterationVarRefRVal(IterationVarRef); | ||||||||||
14052 | |||||||||||
14053 | // Create the DeclStmt that holds the iteration variable. | ||||||||||
14054 | Stmt *InitStmt = new (S.Context) DeclStmt(DeclGroupRef(IterationVar),Loc,Loc); | ||||||||||
14055 | |||||||||||
14056 | // Subscript the "from" and "to" expressions with the iteration variable. | ||||||||||
14057 | SubscriptBuilder FromIndexCopy(From, IterationVarRefRVal); | ||||||||||
14058 | MoveCastBuilder FromIndexMove(FromIndexCopy); | ||||||||||
14059 | const ExprBuilder *FromIndex; | ||||||||||
14060 | if (Copying) | ||||||||||
14061 | FromIndex = &FromIndexCopy; | ||||||||||
14062 | else | ||||||||||
14063 | FromIndex = &FromIndexMove; | ||||||||||
14064 | |||||||||||
14065 | SubscriptBuilder ToIndex(To, IterationVarRefRVal); | ||||||||||
14066 | |||||||||||
14067 | // Build the copy/move for an individual element of the array. | ||||||||||
14068 | StmtResult Copy = | ||||||||||
14069 | buildSingleCopyAssignRecursively(S, Loc, ArrayTy->getElementType(), | ||||||||||
14070 | ToIndex, *FromIndex, CopyingBaseSubobject, | ||||||||||
14071 | Copying, Depth + 1); | ||||||||||
14072 | // Bail out if copying fails or if we determined that we should use memcpy. | ||||||||||
14073 | if (Copy.isInvalid() || !Copy.get()) | ||||||||||
14074 | return Copy; | ||||||||||
14075 | |||||||||||
14076 | // Create the comparison against the array bound. | ||||||||||
14077 | llvm::APInt Upper | ||||||||||
14078 | = ArrayTy->getSize().zextOrTrunc(S.Context.getTypeSize(SizeType)); | ||||||||||
14079 | Expr *Comparison = BinaryOperator::Create( | ||||||||||
14080 | S.Context, IterationVarRefRVal.build(S, Loc), | ||||||||||
14081 | IntegerLiteral::Create(S.Context, Upper, SizeType, Loc), BO_NE, | ||||||||||
14082 | S.Context.BoolTy, VK_PRValue, OK_Ordinary, Loc, | ||||||||||
14083 | S.CurFPFeatureOverrides()); | ||||||||||
14084 | |||||||||||
14085 | // Create the pre-increment of the iteration variable. We can determine | ||||||||||
14086 | // whether the increment will overflow based on the value of the array | ||||||||||
14087 | // bound. | ||||||||||
14088 | Expr *Increment = UnaryOperator::Create( | ||||||||||
14089 | S.Context, IterationVarRef.build(S, Loc), UO_PreInc, SizeType, VK_LValue, | ||||||||||
14090 | OK_Ordinary, Loc, Upper.isMaxValue(), S.CurFPFeatureOverrides()); | ||||||||||
14091 | |||||||||||
14092 | // Construct the loop that copies all elements of this array. | ||||||||||
14093 | return S.ActOnForStmt( | ||||||||||
14094 | Loc, Loc, InitStmt, | ||||||||||
14095 | S.ActOnCondition(nullptr, Loc, Comparison, Sema::ConditionKind::Boolean), | ||||||||||
14096 | S.MakeFullDiscardedValueExpr(Increment), Loc, Copy.get()); | ||||||||||
14097 | } | ||||||||||
14098 | |||||||||||
14099 | static StmtResult | ||||||||||
14100 | buildSingleCopyAssign(Sema &S, SourceLocation Loc, QualType T, | ||||||||||
14101 | const ExprBuilder &To, const ExprBuilder &From, | ||||||||||
14102 | bool CopyingBaseSubobject, bool Copying) { | ||||||||||
14103 | // Maybe we should use a memcpy? | ||||||||||
14104 | if (T->isArrayType() && !T.isConstQualified() && !T.isVolatileQualified() && | ||||||||||
14105 | T.isTriviallyCopyableType(S.Context)) | ||||||||||
14106 | return buildMemcpyForAssignmentOp(S, Loc, T, To, From); | ||||||||||
14107 | |||||||||||
14108 | StmtResult Result(buildSingleCopyAssignRecursively(S, Loc, T, To, From, | ||||||||||
14109 | CopyingBaseSubobject, | ||||||||||
14110 | Copying, 0)); | ||||||||||
14111 | |||||||||||
14112 | // If we ended up picking a trivial assignment operator for an array of a | ||||||||||
14113 | // non-trivially-copyable class type, just emit a memcpy. | ||||||||||
14114 | if (!Result.isInvalid() && !Result.get()) | ||||||||||
14115 | return buildMemcpyForAssignmentOp(S, Loc, T, To, From); | ||||||||||
14116 | |||||||||||
14117 | return Result; | ||||||||||
14118 | } | ||||||||||
14119 | |||||||||||
14120 | CXXMethodDecl *Sema::DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl) { | ||||||||||
14121 | // Note: The following rules are largely analoguous to the copy | ||||||||||
14122 | // constructor rules. Note that virtual bases are not taken into account | ||||||||||
14123 | // for determining the argument type of the operator. Note also that | ||||||||||
14124 | // operators taking an object instead of a reference are allowed. | ||||||||||
14125 | assert(ClassDecl->needsImplicitCopyAssignment())(static_cast <bool> (ClassDecl->needsImplicitCopyAssignment ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitCopyAssignment()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14125, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14126 | |||||||||||
14127 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXCopyAssignment); | ||||||||||
14128 | if (DSM.isAlreadyBeingDeclared()) | ||||||||||
14129 | return nullptr; | ||||||||||
14130 | |||||||||||
14131 | QualType ArgType = Context.getTypeDeclType(ClassDecl); | ||||||||||
14132 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||||||||
14133 | if (AS != LangAS::Default) | ||||||||||
14134 | ArgType = Context.getAddrSpaceQualType(ArgType, AS); | ||||||||||
14135 | QualType RetType = Context.getLValueReferenceType(ArgType); | ||||||||||
14136 | bool Const = ClassDecl->implicitCopyAssignmentHasConstParam(); | ||||||||||
14137 | if (Const) | ||||||||||
14138 | ArgType = ArgType.withConst(); | ||||||||||
14139 | |||||||||||
14140 | ArgType = Context.getLValueReferenceType(ArgType); | ||||||||||
14141 | |||||||||||
14142 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||||||
14143 | CXXCopyAssignment, | ||||||||||
14144 | Const); | ||||||||||
14145 | |||||||||||
14146 | // An implicitly-declared copy assignment operator is an inline public | ||||||||||
14147 | // member of its class. | ||||||||||
14148 | DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||||||||
14149 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||||||
14150 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||||||
14151 | CXXMethodDecl *CopyAssignment = CXXMethodDecl::Create( | ||||||||||
14152 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), | ||||||||||
14153 | /*TInfo=*/nullptr, /*StorageClass=*/SC_None, | ||||||||||
14154 | /*isInline=*/true, | ||||||||||
14155 | Constexpr ? ConstexprSpecKind::Constexpr : ConstexprSpecKind::Unspecified, | ||||||||||
14156 | SourceLocation()); | ||||||||||
14157 | CopyAssignment->setAccess(AS_public); | ||||||||||
14158 | CopyAssignment->setDefaulted(); | ||||||||||
14159 | CopyAssignment->setImplicit(); | ||||||||||
14160 | |||||||||||
14161 | if (getLangOpts().CUDA) { | ||||||||||
14162 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXCopyAssignment, | ||||||||||
14163 | CopyAssignment, | ||||||||||
14164 | /* ConstRHS */ Const, | ||||||||||
14165 | /* Diagnose */ false); | ||||||||||
14166 | } | ||||||||||
14167 | |||||||||||
14168 | setupImplicitSpecialMemberType(CopyAssignment, RetType, ArgType); | ||||||||||
14169 | |||||||||||
14170 | // Add the parameter to the operator. | ||||||||||
14171 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, CopyAssignment, | ||||||||||
14172 | ClassLoc, ClassLoc, | ||||||||||
14173 | /*Id=*/nullptr, ArgType, | ||||||||||
14174 | /*TInfo=*/nullptr, SC_None, | ||||||||||
14175 | nullptr); | ||||||||||
14176 | CopyAssignment->setParams(FromParam); | ||||||||||
14177 | |||||||||||
14178 | CopyAssignment->setTrivial( | ||||||||||
14179 | ClassDecl->needsOverloadResolutionForCopyAssignment() | ||||||||||
14180 | ? SpecialMemberIsTrivial(CopyAssignment, CXXCopyAssignment) | ||||||||||
14181 | : ClassDecl->hasTrivialCopyAssignment()); | ||||||||||
14182 | |||||||||||
14183 | // Note that we have added this copy-assignment operator. | ||||||||||
14184 | ++getASTContext().NumImplicitCopyAssignmentOperatorsDeclared; | ||||||||||
14185 | |||||||||||
14186 | Scope *S = getScopeForContext(ClassDecl); | ||||||||||
14187 | CheckImplicitSpecialMemberDeclaration(S, CopyAssignment); | ||||||||||
14188 | |||||||||||
14189 | if (ShouldDeleteSpecialMember(CopyAssignment, CXXCopyAssignment)) { | ||||||||||
14190 | ClassDecl->setImplicitCopyAssignmentIsDeleted(); | ||||||||||
14191 | SetDeclDeleted(CopyAssignment, ClassLoc); | ||||||||||
14192 | } | ||||||||||
14193 | |||||||||||
14194 | if (S) | ||||||||||
14195 | PushOnScopeChains(CopyAssignment, S, false); | ||||||||||
14196 | ClassDecl->addDecl(CopyAssignment); | ||||||||||
14197 | |||||||||||
14198 | return CopyAssignment; | ||||||||||
14199 | } | ||||||||||
14200 | |||||||||||
14201 | /// Diagnose an implicit copy operation for a class which is odr-used, but | ||||||||||
14202 | /// which is deprecated because the class has a user-declared copy constructor, | ||||||||||
14203 | /// copy assignment operator, or destructor. | ||||||||||
14204 | static void diagnoseDeprecatedCopyOperation(Sema &S, CXXMethodDecl *CopyOp) { | ||||||||||
14205 | assert(CopyOp->isImplicit())(static_cast <bool> (CopyOp->isImplicit()) ? void (0 ) : __assert_fail ("CopyOp->isImplicit()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14205, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14206 | |||||||||||
14207 | CXXRecordDecl *RD = CopyOp->getParent(); | ||||||||||
14208 | CXXMethodDecl *UserDeclaredOperation = nullptr; | ||||||||||
14209 | |||||||||||
14210 | // In Microsoft mode, assignment operations don't affect constructors and | ||||||||||
14211 | // vice versa. | ||||||||||
14212 | if (RD->hasUserDeclaredDestructor()) { | ||||||||||
14213 | UserDeclaredOperation = RD->getDestructor(); | ||||||||||
14214 | } else if (!isa<CXXConstructorDecl>(CopyOp) && | ||||||||||
14215 | RD->hasUserDeclaredCopyConstructor() && | ||||||||||
14216 | !S.getLangOpts().MSVCCompat) { | ||||||||||
14217 | // Find any user-declared copy constructor. | ||||||||||
14218 | for (auto *I : RD->ctors()) { | ||||||||||
14219 | if (I->isCopyConstructor()) { | ||||||||||
14220 | UserDeclaredOperation = I; | ||||||||||
14221 | break; | ||||||||||
14222 | } | ||||||||||
14223 | } | ||||||||||
14224 | assert(UserDeclaredOperation)(static_cast <bool> (UserDeclaredOperation) ? void (0) : __assert_fail ("UserDeclaredOperation", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14224, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14225 | } else if (isa<CXXConstructorDecl>(CopyOp) && | ||||||||||
14226 | RD->hasUserDeclaredCopyAssignment() && | ||||||||||
14227 | !S.getLangOpts().MSVCCompat) { | ||||||||||
14228 | // Find any user-declared move assignment operator. | ||||||||||
14229 | for (auto *I : RD->methods()) { | ||||||||||
14230 | if (I->isCopyAssignmentOperator()) { | ||||||||||
14231 | UserDeclaredOperation = I; | ||||||||||
14232 | break; | ||||||||||
14233 | } | ||||||||||
14234 | } | ||||||||||
14235 | assert(UserDeclaredOperation)(static_cast <bool> (UserDeclaredOperation) ? void (0) : __assert_fail ("UserDeclaredOperation", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14235, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14236 | } | ||||||||||
14237 | |||||||||||
14238 | if (UserDeclaredOperation) { | ||||||||||
14239 | bool UDOIsUserProvided = UserDeclaredOperation->isUserProvided(); | ||||||||||
14240 | bool UDOIsDestructor = isa<CXXDestructorDecl>(UserDeclaredOperation); | ||||||||||
14241 | bool IsCopyAssignment = !isa<CXXConstructorDecl>(CopyOp); | ||||||||||
14242 | unsigned DiagID = | ||||||||||
14243 | (UDOIsUserProvided && UDOIsDestructor) | ||||||||||
14244 | ? diag::warn_deprecated_copy_with_user_provided_dtor | ||||||||||
14245 | : (UDOIsUserProvided && !UDOIsDestructor) | ||||||||||
14246 | ? diag::warn_deprecated_copy_with_user_provided_copy | ||||||||||
14247 | : (!UDOIsUserProvided && UDOIsDestructor) | ||||||||||
14248 | ? diag::warn_deprecated_copy_with_dtor | ||||||||||
14249 | : diag::warn_deprecated_copy; | ||||||||||
14250 | S.Diag(UserDeclaredOperation->getLocation(), DiagID) | ||||||||||
14251 | << RD << IsCopyAssignment; | ||||||||||
14252 | } | ||||||||||
14253 | } | ||||||||||
14254 | |||||||||||
14255 | void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation, | ||||||||||
14256 | CXXMethodDecl *CopyAssignOperator) { | ||||||||||
14257 | assert((CopyAssignOperator->isDefaulted() &&(static_cast <bool> ((CopyAssignOperator->isDefaulted () && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? void (0) : __assert_fail ("(CopyAssignOperator->isDefaulted() && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && \"DefineImplicitCopyAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14262, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14258 | CopyAssignOperator->isOverloadedOperator() &&(static_cast <bool> ((CopyAssignOperator->isDefaulted () && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? void (0) : __assert_fail ("(CopyAssignOperator->isDefaulted() && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && \"DefineImplicitCopyAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14262, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14259 | CopyAssignOperator->getOverloadedOperator() == OO_Equal &&(static_cast <bool> ((CopyAssignOperator->isDefaulted () && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? void (0) : __assert_fail ("(CopyAssignOperator->isDefaulted() && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && \"DefineImplicitCopyAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14262, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14260 | !CopyAssignOperator->doesThisDeclarationHaveABody() &&(static_cast <bool> ((CopyAssignOperator->isDefaulted () && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? void (0) : __assert_fail ("(CopyAssignOperator->isDefaulted() && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && \"DefineImplicitCopyAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14262, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14261 | !CopyAssignOperator->isDeleted()) &&(static_cast <bool> ((CopyAssignOperator->isDefaulted () && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? void (0) : __assert_fail ("(CopyAssignOperator->isDefaulted() && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && \"DefineImplicitCopyAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14262, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14262 | "DefineImplicitCopyAssignment called for wrong function")(static_cast <bool> ((CopyAssignOperator->isDefaulted () && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? void (0) : __assert_fail ("(CopyAssignOperator->isDefaulted() && CopyAssignOperator->isOverloadedOperator() && CopyAssignOperator->getOverloadedOperator() == OO_Equal && !CopyAssignOperator->doesThisDeclarationHaveABody() && !CopyAssignOperator->isDeleted()) && \"DefineImplicitCopyAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14262, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14263 | if (CopyAssignOperator->willHaveBody() || CopyAssignOperator->isInvalidDecl()) | ||||||||||
14264 | return; | ||||||||||
14265 | |||||||||||
14266 | CXXRecordDecl *ClassDecl = CopyAssignOperator->getParent(); | ||||||||||
14267 | if (ClassDecl->isInvalidDecl()) { | ||||||||||
14268 | CopyAssignOperator->setInvalidDecl(); | ||||||||||
14269 | return; | ||||||||||
14270 | } | ||||||||||
14271 | |||||||||||
14272 | SynthesizedFunctionScope Scope(*this, CopyAssignOperator); | ||||||||||
14273 | |||||||||||
14274 | // The exception specification is needed because we are defining the | ||||||||||
14275 | // function. | ||||||||||
14276 | ResolveExceptionSpec(CurrentLocation, | ||||||||||
14277 | CopyAssignOperator->getType()->castAs<FunctionProtoType>()); | ||||||||||
14278 | |||||||||||
14279 | // Add a context note for diagnostics produced after this point. | ||||||||||
14280 | Scope.addContextNote(CurrentLocation); | ||||||||||
14281 | |||||||||||
14282 | // C++11 [class.copy]p18: | ||||||||||
14283 | // The [definition of an implicitly declared copy assignment operator] is | ||||||||||
14284 | // deprecated if the class has a user-declared copy constructor or a | ||||||||||
14285 | // user-declared destructor. | ||||||||||
14286 | if (getLangOpts().CPlusPlus11 && CopyAssignOperator->isImplicit()) | ||||||||||
14287 | diagnoseDeprecatedCopyOperation(*this, CopyAssignOperator); | ||||||||||
14288 | |||||||||||
14289 | // C++0x [class.copy]p30: | ||||||||||
14290 | // The implicitly-defined or explicitly-defaulted copy assignment operator | ||||||||||
14291 | // for a non-union class X performs memberwise copy assignment of its | ||||||||||
14292 | // subobjects. The direct base classes of X are assigned first, in the | ||||||||||
14293 | // order of their declaration in the base-specifier-list, and then the | ||||||||||
14294 | // immediate non-static data members of X are assigned, in the order in | ||||||||||
14295 | // which they were declared in the class definition. | ||||||||||
14296 | |||||||||||
14297 | // The statements that form the synthesized function body. | ||||||||||
14298 | SmallVector<Stmt*, 8> Statements; | ||||||||||
14299 | |||||||||||
14300 | // The parameter for the "other" object, which we are copying from. | ||||||||||
14301 | ParmVarDecl *Other = CopyAssignOperator->getParamDecl(0); | ||||||||||
14302 | Qualifiers OtherQuals = Other->getType().getQualifiers(); | ||||||||||
14303 | QualType OtherRefType = Other->getType(); | ||||||||||
14304 | if (const LValueReferenceType *OtherRef | ||||||||||
14305 | = OtherRefType->getAs<LValueReferenceType>()) { | ||||||||||
14306 | OtherRefType = OtherRef->getPointeeType(); | ||||||||||
14307 | OtherQuals = OtherRefType.getQualifiers(); | ||||||||||
14308 | } | ||||||||||
14309 | |||||||||||
14310 | // Our location for everything implicitly-generated. | ||||||||||
14311 | SourceLocation Loc = CopyAssignOperator->getEndLoc().isValid() | ||||||||||
14312 | ? CopyAssignOperator->getEndLoc() | ||||||||||
14313 | : CopyAssignOperator->getLocation(); | ||||||||||
14314 | |||||||||||
14315 | // Builds a DeclRefExpr for the "other" object. | ||||||||||
14316 | RefBuilder OtherRef(Other, OtherRefType); | ||||||||||
14317 | |||||||||||
14318 | // Builds the "this" pointer. | ||||||||||
14319 | ThisBuilder This; | ||||||||||
14320 | |||||||||||
14321 | // Assign base classes. | ||||||||||
14322 | bool Invalid = false; | ||||||||||
14323 | for (auto &Base : ClassDecl->bases()) { | ||||||||||
14324 | // Form the assignment: | ||||||||||
14325 | // static_cast<Base*>(this)->Base::operator=(static_cast<Base&>(other)); | ||||||||||
14326 | QualType BaseType = Base.getType().getUnqualifiedType(); | ||||||||||
14327 | if (!BaseType->isRecordType()) { | ||||||||||
14328 | Invalid = true; | ||||||||||
14329 | continue; | ||||||||||
14330 | } | ||||||||||
14331 | |||||||||||
14332 | CXXCastPath BasePath; | ||||||||||
14333 | BasePath.push_back(&Base); | ||||||||||
14334 | |||||||||||
14335 | // Construct the "from" expression, which is an implicit cast to the | ||||||||||
14336 | // appropriately-qualified base type. | ||||||||||
14337 | CastBuilder From(OtherRef, Context.getQualifiedType(BaseType, OtherQuals), | ||||||||||
14338 | VK_LValue, BasePath); | ||||||||||
14339 | |||||||||||
14340 | // Dereference "this". | ||||||||||
14341 | DerefBuilder DerefThis(This); | ||||||||||
14342 | CastBuilder To(DerefThis, | ||||||||||
14343 | Context.getQualifiedType( | ||||||||||
14344 | BaseType, CopyAssignOperator->getMethodQualifiers()), | ||||||||||
14345 | VK_LValue, BasePath); | ||||||||||
14346 | |||||||||||
14347 | // Build the copy. | ||||||||||
14348 | StmtResult Copy = buildSingleCopyAssign(*this, Loc, BaseType, | ||||||||||
14349 | To, From, | ||||||||||
14350 | /*CopyingBaseSubobject=*/true, | ||||||||||
14351 | /*Copying=*/true); | ||||||||||
14352 | if (Copy.isInvalid()) { | ||||||||||
14353 | CopyAssignOperator->setInvalidDecl(); | ||||||||||
14354 | return; | ||||||||||
14355 | } | ||||||||||
14356 | |||||||||||
14357 | // Success! Record the copy. | ||||||||||
14358 | Statements.push_back(Copy.getAs<Expr>()); | ||||||||||
14359 | } | ||||||||||
14360 | |||||||||||
14361 | // Assign non-static members. | ||||||||||
14362 | for (auto *Field : ClassDecl->fields()) { | ||||||||||
14363 | // FIXME: We should form some kind of AST representation for the implied | ||||||||||
14364 | // memcpy in a union copy operation. | ||||||||||
14365 | if (Field->isUnnamedBitfield() || Field->getParent()->isUnion()) | ||||||||||
14366 | continue; | ||||||||||
14367 | |||||||||||
14368 | if (Field->isInvalidDecl()) { | ||||||||||
14369 | Invalid = true; | ||||||||||
14370 | continue; | ||||||||||
14371 | } | ||||||||||
14372 | |||||||||||
14373 | // Check for members of reference type; we can't copy those. | ||||||||||
14374 | if (Field->getType()->isReferenceType()) { | ||||||||||
14375 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||||||||
14376 | << Context.getTagDeclType(ClassDecl) << 0 << Field->getDeclName(); | ||||||||||
14377 | Diag(Field->getLocation(), diag::note_declared_at); | ||||||||||
14378 | Invalid = true; | ||||||||||
14379 | continue; | ||||||||||
14380 | } | ||||||||||
14381 | |||||||||||
14382 | // Check for members of const-qualified, non-class type. | ||||||||||
14383 | QualType BaseType = Context.getBaseElementType(Field->getType()); | ||||||||||
14384 | if (!BaseType->getAs<RecordType>() && BaseType.isConstQualified()) { | ||||||||||
14385 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||||||||
14386 | << Context.getTagDeclType(ClassDecl) << 1 << Field->getDeclName(); | ||||||||||
14387 | Diag(Field->getLocation(), diag::note_declared_at); | ||||||||||
14388 | Invalid = true; | ||||||||||
14389 | continue; | ||||||||||
14390 | } | ||||||||||
14391 | |||||||||||
14392 | // Suppress assigning zero-width bitfields. | ||||||||||
14393 | if (Field->isZeroLengthBitField(Context)) | ||||||||||
14394 | continue; | ||||||||||
14395 | |||||||||||
14396 | QualType FieldType = Field->getType().getNonReferenceType(); | ||||||||||
14397 | if (FieldType->isIncompleteArrayType()) { | ||||||||||
14398 | assert(ClassDecl->hasFlexibleArrayMember() &&(static_cast <bool> (ClassDecl->hasFlexibleArrayMember () && "Incomplete array type is not valid") ? void (0 ) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14399, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14399 | "Incomplete array type is not valid")(static_cast <bool> (ClassDecl->hasFlexibleArrayMember () && "Incomplete array type is not valid") ? void (0 ) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14399, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14400 | continue; | ||||||||||
14401 | } | ||||||||||
14402 | |||||||||||
14403 | // Build references to the field in the object we're copying from and to. | ||||||||||
14404 | CXXScopeSpec SS; // Intentionally empty | ||||||||||
14405 | LookupResult MemberLookup(*this, Field->getDeclName(), Loc, | ||||||||||
14406 | LookupMemberName); | ||||||||||
14407 | MemberLookup.addDecl(Field); | ||||||||||
14408 | MemberLookup.resolveKind(); | ||||||||||
14409 | |||||||||||
14410 | MemberBuilder From(OtherRef, OtherRefType, /*IsArrow=*/false, MemberLookup); | ||||||||||
14411 | |||||||||||
14412 | MemberBuilder To(This, getCurrentThisType(), /*IsArrow=*/true, MemberLookup); | ||||||||||
14413 | |||||||||||
14414 | // Build the copy of this field. | ||||||||||
14415 | StmtResult Copy = buildSingleCopyAssign(*this, Loc, FieldType, | ||||||||||
14416 | To, From, | ||||||||||
14417 | /*CopyingBaseSubobject=*/false, | ||||||||||
14418 | /*Copying=*/true); | ||||||||||
14419 | if (Copy.isInvalid()) { | ||||||||||
14420 | CopyAssignOperator->setInvalidDecl(); | ||||||||||
14421 | return; | ||||||||||
14422 | } | ||||||||||
14423 | |||||||||||
14424 | // Success! Record the copy. | ||||||||||
14425 | Statements.push_back(Copy.getAs<Stmt>()); | ||||||||||
14426 | } | ||||||||||
14427 | |||||||||||
14428 | if (!Invalid) { | ||||||||||
14429 | // Add a "return *this;" | ||||||||||
14430 | ExprResult ThisObj = CreateBuiltinUnaryOp(Loc, UO_Deref, This.build(*this, Loc)); | ||||||||||
14431 | |||||||||||
14432 | StmtResult Return = BuildReturnStmt(Loc, ThisObj.get()); | ||||||||||
14433 | if (Return.isInvalid()) | ||||||||||
14434 | Invalid = true; | ||||||||||
14435 | else | ||||||||||
14436 | Statements.push_back(Return.getAs<Stmt>()); | ||||||||||
14437 | } | ||||||||||
14438 | |||||||||||
14439 | if (Invalid) { | ||||||||||
14440 | CopyAssignOperator->setInvalidDecl(); | ||||||||||
14441 | return; | ||||||||||
14442 | } | ||||||||||
14443 | |||||||||||
14444 | StmtResult Body; | ||||||||||
14445 | { | ||||||||||
14446 | CompoundScopeRAII CompoundScope(*this); | ||||||||||
14447 | Body = ActOnCompoundStmt(Loc, Loc, Statements, | ||||||||||
14448 | /*isStmtExpr=*/false); | ||||||||||
14449 | assert(!Body.isInvalid() && "Compound statement creation cannot fail")(static_cast <bool> (!Body.isInvalid() && "Compound statement creation cannot fail" ) ? void (0) : __assert_fail ("!Body.isInvalid() && \"Compound statement creation cannot fail\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14449, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14450 | } | ||||||||||
14451 | CopyAssignOperator->setBody(Body.getAs<Stmt>()); | ||||||||||
14452 | CopyAssignOperator->markUsed(Context); | ||||||||||
14453 | |||||||||||
14454 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
14455 | L->CompletedImplicitDefinition(CopyAssignOperator); | ||||||||||
14456 | } | ||||||||||
14457 | } | ||||||||||
14458 | |||||||||||
14459 | CXXMethodDecl *Sema::DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl) { | ||||||||||
14460 | assert(ClassDecl->needsImplicitMoveAssignment())(static_cast <bool> (ClassDecl->needsImplicitMoveAssignment ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitMoveAssignment()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14460, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14461 | |||||||||||
14462 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXMoveAssignment); | ||||||||||
14463 | if (DSM.isAlreadyBeingDeclared()) | ||||||||||
14464 | return nullptr; | ||||||||||
14465 | |||||||||||
14466 | // Note: The following rules are largely analoguous to the move | ||||||||||
14467 | // constructor rules. | ||||||||||
14468 | |||||||||||
14469 | QualType ArgType = Context.getTypeDeclType(ClassDecl); | ||||||||||
14470 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||||||||
14471 | if (AS != LangAS::Default) | ||||||||||
14472 | ArgType = Context.getAddrSpaceQualType(ArgType, AS); | ||||||||||
14473 | QualType RetType = Context.getLValueReferenceType(ArgType); | ||||||||||
14474 | ArgType = Context.getRValueReferenceType(ArgType); | ||||||||||
14475 | |||||||||||
14476 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||||||
14477 | CXXMoveAssignment, | ||||||||||
14478 | false); | ||||||||||
14479 | |||||||||||
14480 | // An implicitly-declared move assignment operator is an inline public | ||||||||||
14481 | // member of its class. | ||||||||||
14482 | DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||||||||
14483 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||||||
14484 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||||||
14485 | CXXMethodDecl *MoveAssignment = CXXMethodDecl::Create( | ||||||||||
14486 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), | ||||||||||
14487 | /*TInfo=*/nullptr, /*StorageClass=*/SC_None, | ||||||||||
14488 | /*isInline=*/true, | ||||||||||
14489 | Constexpr ? ConstexprSpecKind::Constexpr : ConstexprSpecKind::Unspecified, | ||||||||||
14490 | SourceLocation()); | ||||||||||
14491 | MoveAssignment->setAccess(AS_public); | ||||||||||
14492 | MoveAssignment->setDefaulted(); | ||||||||||
14493 | MoveAssignment->setImplicit(); | ||||||||||
14494 | |||||||||||
14495 | if (getLangOpts().CUDA) { | ||||||||||
14496 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXMoveAssignment, | ||||||||||
14497 | MoveAssignment, | ||||||||||
14498 | /* ConstRHS */ false, | ||||||||||
14499 | /* Diagnose */ false); | ||||||||||
14500 | } | ||||||||||
14501 | |||||||||||
14502 | setupImplicitSpecialMemberType(MoveAssignment, RetType, ArgType); | ||||||||||
14503 | |||||||||||
14504 | // Add the parameter to the operator. | ||||||||||
14505 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, MoveAssignment, | ||||||||||
14506 | ClassLoc, ClassLoc, | ||||||||||
14507 | /*Id=*/nullptr, ArgType, | ||||||||||
14508 | /*TInfo=*/nullptr, SC_None, | ||||||||||
14509 | nullptr); | ||||||||||
14510 | MoveAssignment->setParams(FromParam); | ||||||||||
14511 | |||||||||||
14512 | MoveAssignment->setTrivial( | ||||||||||
14513 | ClassDecl->needsOverloadResolutionForMoveAssignment() | ||||||||||
14514 | ? SpecialMemberIsTrivial(MoveAssignment, CXXMoveAssignment) | ||||||||||
14515 | : ClassDecl->hasTrivialMoveAssignment()); | ||||||||||
14516 | |||||||||||
14517 | // Note that we have added this copy-assignment operator. | ||||||||||
14518 | ++getASTContext().NumImplicitMoveAssignmentOperatorsDeclared; | ||||||||||
14519 | |||||||||||
14520 | Scope *S = getScopeForContext(ClassDecl); | ||||||||||
14521 | CheckImplicitSpecialMemberDeclaration(S, MoveAssignment); | ||||||||||
14522 | |||||||||||
14523 | if (ShouldDeleteSpecialMember(MoveAssignment, CXXMoveAssignment)) { | ||||||||||
14524 | ClassDecl->setImplicitMoveAssignmentIsDeleted(); | ||||||||||
14525 | SetDeclDeleted(MoveAssignment, ClassLoc); | ||||||||||
14526 | } | ||||||||||
14527 | |||||||||||
14528 | if (S) | ||||||||||
14529 | PushOnScopeChains(MoveAssignment, S, false); | ||||||||||
14530 | ClassDecl->addDecl(MoveAssignment); | ||||||||||
14531 | |||||||||||
14532 | return MoveAssignment; | ||||||||||
14533 | } | ||||||||||
14534 | |||||||||||
14535 | /// Check if we're implicitly defining a move assignment operator for a class | ||||||||||
14536 | /// with virtual bases. Such a move assignment might move-assign the virtual | ||||||||||
14537 | /// base multiple times. | ||||||||||
14538 | static void checkMoveAssignmentForRepeatedMove(Sema &S, CXXRecordDecl *Class, | ||||||||||
14539 | SourceLocation CurrentLocation) { | ||||||||||
14540 | assert(!Class->isDependentContext() && "should not define dependent move")(static_cast <bool> (!Class->isDependentContext() && "should not define dependent move") ? void (0) : __assert_fail ("!Class->isDependentContext() && \"should not define dependent move\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14540, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14541 | |||||||||||
14542 | // Only a virtual base could get implicitly move-assigned multiple times. | ||||||||||
14543 | // Only a non-trivial move assignment can observe this. We only want to | ||||||||||
14544 | // diagnose if we implicitly define an assignment operator that assigns | ||||||||||
14545 | // two base classes, both of which move-assign the same virtual base. | ||||||||||
14546 | if (Class->getNumVBases() == 0 || Class->hasTrivialMoveAssignment() || | ||||||||||
14547 | Class->getNumBases() < 2) | ||||||||||
14548 | return; | ||||||||||
14549 | |||||||||||
14550 | llvm::SmallVector<CXXBaseSpecifier *, 16> Worklist; | ||||||||||
14551 | typedef llvm::DenseMap<CXXRecordDecl*, CXXBaseSpecifier*> VBaseMap; | ||||||||||
14552 | VBaseMap VBases; | ||||||||||
14553 | |||||||||||
14554 | for (auto &BI : Class->bases()) { | ||||||||||
14555 | Worklist.push_back(&BI); | ||||||||||
14556 | while (!Worklist.empty()) { | ||||||||||
14557 | CXXBaseSpecifier *BaseSpec = Worklist.pop_back_val(); | ||||||||||
14558 | CXXRecordDecl *Base = BaseSpec->getType()->getAsCXXRecordDecl(); | ||||||||||
14559 | |||||||||||
14560 | // If the base has no non-trivial move assignment operators, | ||||||||||
14561 | // we don't care about moves from it. | ||||||||||
14562 | if (!Base->hasNonTrivialMoveAssignment()) | ||||||||||
14563 | continue; | ||||||||||
14564 | |||||||||||
14565 | // If there's nothing virtual here, skip it. | ||||||||||
14566 | if (!BaseSpec->isVirtual() && !Base->getNumVBases()) | ||||||||||
14567 | continue; | ||||||||||
14568 | |||||||||||
14569 | // If we're not actually going to call a move assignment for this base, | ||||||||||
14570 | // or the selected move assignment is trivial, skip it. | ||||||||||
14571 | Sema::SpecialMemberOverloadResult SMOR = | ||||||||||
14572 | S.LookupSpecialMember(Base, Sema::CXXMoveAssignment, | ||||||||||
14573 | /*ConstArg*/false, /*VolatileArg*/false, | ||||||||||
14574 | /*RValueThis*/true, /*ConstThis*/false, | ||||||||||
14575 | /*VolatileThis*/false); | ||||||||||
14576 | if (!SMOR.getMethod() || SMOR.getMethod()->isTrivial() || | ||||||||||
14577 | !SMOR.getMethod()->isMoveAssignmentOperator()) | ||||||||||
14578 | continue; | ||||||||||
14579 | |||||||||||
14580 | if (BaseSpec->isVirtual()) { | ||||||||||
14581 | // We're going to move-assign this virtual base, and its move | ||||||||||
14582 | // assignment operator is not trivial. If this can happen for | ||||||||||
14583 | // multiple distinct direct bases of Class, diagnose it. (If it | ||||||||||
14584 | // only happens in one base, we'll diagnose it when synthesizing | ||||||||||
14585 | // that base class's move assignment operator.) | ||||||||||
14586 | CXXBaseSpecifier *&Existing = | ||||||||||
14587 | VBases.insert(std::make_pair(Base->getCanonicalDecl(), &BI)) | ||||||||||
14588 | .first->second; | ||||||||||
14589 | if (Existing && Existing != &BI) { | ||||||||||
14590 | S.Diag(CurrentLocation, diag::warn_vbase_moved_multiple_times) | ||||||||||
14591 | << Class << Base; | ||||||||||
14592 | S.Diag(Existing->getBeginLoc(), diag::note_vbase_moved_here) | ||||||||||
14593 | << (Base->getCanonicalDecl() == | ||||||||||
14594 | Existing->getType()->getAsCXXRecordDecl()->getCanonicalDecl()) | ||||||||||
14595 | << Base << Existing->getType() << Existing->getSourceRange(); | ||||||||||
14596 | S.Diag(BI.getBeginLoc(), diag::note_vbase_moved_here) | ||||||||||
14597 | << (Base->getCanonicalDecl() == | ||||||||||
14598 | BI.getType()->getAsCXXRecordDecl()->getCanonicalDecl()) | ||||||||||
14599 | << Base << BI.getType() << BaseSpec->getSourceRange(); | ||||||||||
14600 | |||||||||||
14601 | // Only diagnose each vbase once. | ||||||||||
14602 | Existing = nullptr; | ||||||||||
14603 | } | ||||||||||
14604 | } else { | ||||||||||
14605 | // Only walk over bases that have defaulted move assignment operators. | ||||||||||
14606 | // We assume that any user-provided move assignment operator handles | ||||||||||
14607 | // the multiple-moves-of-vbase case itself somehow. | ||||||||||
14608 | if (!SMOR.getMethod()->isDefaulted()) | ||||||||||
14609 | continue; | ||||||||||
14610 | |||||||||||
14611 | // We're going to move the base classes of Base. Add them to the list. | ||||||||||
14612 | for (auto &BI : Base->bases()) | ||||||||||
14613 | Worklist.push_back(&BI); | ||||||||||
14614 | } | ||||||||||
14615 | } | ||||||||||
14616 | } | ||||||||||
14617 | } | ||||||||||
14618 | |||||||||||
14619 | void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation, | ||||||||||
14620 | CXXMethodDecl *MoveAssignOperator) { | ||||||||||
14621 | assert((MoveAssignOperator->isDefaulted() &&(static_cast <bool> ((MoveAssignOperator->isDefaulted () && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? void (0) : __assert_fail ("(MoveAssignOperator->isDefaulted() && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && \"DefineImplicitMoveAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14626, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14622 | MoveAssignOperator->isOverloadedOperator() &&(static_cast <bool> ((MoveAssignOperator->isDefaulted () && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? void (0) : __assert_fail ("(MoveAssignOperator->isDefaulted() && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && \"DefineImplicitMoveAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14626, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14623 | MoveAssignOperator->getOverloadedOperator() == OO_Equal &&(static_cast <bool> ((MoveAssignOperator->isDefaulted () && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? void (0) : __assert_fail ("(MoveAssignOperator->isDefaulted() && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && \"DefineImplicitMoveAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14626, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14624 | !MoveAssignOperator->doesThisDeclarationHaveABody() &&(static_cast <bool> ((MoveAssignOperator->isDefaulted () && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? void (0) : __assert_fail ("(MoveAssignOperator->isDefaulted() && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && \"DefineImplicitMoveAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14626, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14625 | !MoveAssignOperator->isDeleted()) &&(static_cast <bool> ((MoveAssignOperator->isDefaulted () && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? void (0) : __assert_fail ("(MoveAssignOperator->isDefaulted() && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && \"DefineImplicitMoveAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14626, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14626 | "DefineImplicitMoveAssignment called for wrong function")(static_cast <bool> ((MoveAssignOperator->isDefaulted () && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? void (0) : __assert_fail ("(MoveAssignOperator->isDefaulted() && MoveAssignOperator->isOverloadedOperator() && MoveAssignOperator->getOverloadedOperator() == OO_Equal && !MoveAssignOperator->doesThisDeclarationHaveABody() && !MoveAssignOperator->isDeleted()) && \"DefineImplicitMoveAssignment called for wrong function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14626, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14627 | if (MoveAssignOperator->willHaveBody() || MoveAssignOperator->isInvalidDecl()) | ||||||||||
14628 | return; | ||||||||||
14629 | |||||||||||
14630 | CXXRecordDecl *ClassDecl = MoveAssignOperator->getParent(); | ||||||||||
14631 | if (ClassDecl->isInvalidDecl()) { | ||||||||||
14632 | MoveAssignOperator->setInvalidDecl(); | ||||||||||
14633 | return; | ||||||||||
14634 | } | ||||||||||
14635 | |||||||||||
14636 | // C++0x [class.copy]p28: | ||||||||||
14637 | // The implicitly-defined or move assignment operator for a non-union class | ||||||||||
14638 | // X performs memberwise move assignment of its subobjects. The direct base | ||||||||||
14639 | // classes of X are assigned first, in the order of their declaration in the | ||||||||||
14640 | // base-specifier-list, and then the immediate non-static data members of X | ||||||||||
14641 | // are assigned, in the order in which they were declared in the class | ||||||||||
14642 | // definition. | ||||||||||
14643 | |||||||||||
14644 | // Issue a warning if our implicit move assignment operator will move | ||||||||||
14645 | // from a virtual base more than once. | ||||||||||
14646 | checkMoveAssignmentForRepeatedMove(*this, ClassDecl, CurrentLocation); | ||||||||||
14647 | |||||||||||
14648 | SynthesizedFunctionScope Scope(*this, MoveAssignOperator); | ||||||||||
14649 | |||||||||||
14650 | // The exception specification is needed because we are defining the | ||||||||||
14651 | // function. | ||||||||||
14652 | ResolveExceptionSpec(CurrentLocation, | ||||||||||
14653 | MoveAssignOperator->getType()->castAs<FunctionProtoType>()); | ||||||||||
14654 | |||||||||||
14655 | // Add a context note for diagnostics produced after this point. | ||||||||||
14656 | Scope.addContextNote(CurrentLocation); | ||||||||||
14657 | |||||||||||
14658 | // The statements that form the synthesized function body. | ||||||||||
14659 | SmallVector<Stmt*, 8> Statements; | ||||||||||
14660 | |||||||||||
14661 | // The parameter for the "other" object, which we are move from. | ||||||||||
14662 | ParmVarDecl *Other = MoveAssignOperator->getParamDecl(0); | ||||||||||
14663 | QualType OtherRefType = | ||||||||||
14664 | Other->getType()->castAs<RValueReferenceType>()->getPointeeType(); | ||||||||||
14665 | |||||||||||
14666 | // Our location for everything implicitly-generated. | ||||||||||
14667 | SourceLocation Loc = MoveAssignOperator->getEndLoc().isValid() | ||||||||||
14668 | ? MoveAssignOperator->getEndLoc() | ||||||||||
14669 | : MoveAssignOperator->getLocation(); | ||||||||||
14670 | |||||||||||
14671 | // Builds a reference to the "other" object. | ||||||||||
14672 | RefBuilder OtherRef(Other, OtherRefType); | ||||||||||
14673 | // Cast to rvalue. | ||||||||||
14674 | MoveCastBuilder MoveOther(OtherRef); | ||||||||||
14675 | |||||||||||
14676 | // Builds the "this" pointer. | ||||||||||
14677 | ThisBuilder This; | ||||||||||
14678 | |||||||||||
14679 | // Assign base classes. | ||||||||||
14680 | bool Invalid = false; | ||||||||||
14681 | for (auto &Base : ClassDecl->bases()) { | ||||||||||
14682 | // C++11 [class.copy]p28: | ||||||||||
14683 | // It is unspecified whether subobjects representing virtual base classes | ||||||||||
14684 | // are assigned more than once by the implicitly-defined copy assignment | ||||||||||
14685 | // operator. | ||||||||||
14686 | // FIXME: Do not assign to a vbase that will be assigned by some other base | ||||||||||
14687 | // class. For a move-assignment, this can result in the vbase being moved | ||||||||||
14688 | // multiple times. | ||||||||||
14689 | |||||||||||
14690 | // Form the assignment: | ||||||||||
14691 | // static_cast<Base*>(this)->Base::operator=(static_cast<Base&&>(other)); | ||||||||||
14692 | QualType BaseType = Base.getType().getUnqualifiedType(); | ||||||||||
14693 | if (!BaseType->isRecordType()) { | ||||||||||
14694 | Invalid = true; | ||||||||||
14695 | continue; | ||||||||||
14696 | } | ||||||||||
14697 | |||||||||||
14698 | CXXCastPath BasePath; | ||||||||||
14699 | BasePath.push_back(&Base); | ||||||||||
14700 | |||||||||||
14701 | // Construct the "from" expression, which is an implicit cast to the | ||||||||||
14702 | // appropriately-qualified base type. | ||||||||||
14703 | CastBuilder From(OtherRef, BaseType, VK_XValue, BasePath); | ||||||||||
14704 | |||||||||||
14705 | // Dereference "this". | ||||||||||
14706 | DerefBuilder DerefThis(This); | ||||||||||
14707 | |||||||||||
14708 | // Implicitly cast "this" to the appropriately-qualified base type. | ||||||||||
14709 | CastBuilder To(DerefThis, | ||||||||||
14710 | Context.getQualifiedType( | ||||||||||
14711 | BaseType, MoveAssignOperator->getMethodQualifiers()), | ||||||||||
14712 | VK_LValue, BasePath); | ||||||||||
14713 | |||||||||||
14714 | // Build the move. | ||||||||||
14715 | StmtResult Move = buildSingleCopyAssign(*this, Loc, BaseType, | ||||||||||
14716 | To, From, | ||||||||||
14717 | /*CopyingBaseSubobject=*/true, | ||||||||||
14718 | /*Copying=*/false); | ||||||||||
14719 | if (Move.isInvalid()) { | ||||||||||
14720 | MoveAssignOperator->setInvalidDecl(); | ||||||||||
14721 | return; | ||||||||||
14722 | } | ||||||||||
14723 | |||||||||||
14724 | // Success! Record the move. | ||||||||||
14725 | Statements.push_back(Move.getAs<Expr>()); | ||||||||||
14726 | } | ||||||||||
14727 | |||||||||||
14728 | // Assign non-static members. | ||||||||||
14729 | for (auto *Field : ClassDecl->fields()) { | ||||||||||
14730 | // FIXME: We should form some kind of AST representation for the implied | ||||||||||
14731 | // memcpy in a union copy operation. | ||||||||||
14732 | if (Field->isUnnamedBitfield() || Field->getParent()->isUnion()) | ||||||||||
14733 | continue; | ||||||||||
14734 | |||||||||||
14735 | if (Field->isInvalidDecl()) { | ||||||||||
14736 | Invalid = true; | ||||||||||
14737 | continue; | ||||||||||
14738 | } | ||||||||||
14739 | |||||||||||
14740 | // Check for members of reference type; we can't move those. | ||||||||||
14741 | if (Field->getType()->isReferenceType()) { | ||||||||||
14742 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||||||||
14743 | << Context.getTagDeclType(ClassDecl) << 0 << Field->getDeclName(); | ||||||||||
14744 | Diag(Field->getLocation(), diag::note_declared_at); | ||||||||||
14745 | Invalid = true; | ||||||||||
14746 | continue; | ||||||||||
14747 | } | ||||||||||
14748 | |||||||||||
14749 | // Check for members of const-qualified, non-class type. | ||||||||||
14750 | QualType BaseType = Context.getBaseElementType(Field->getType()); | ||||||||||
14751 | if (!BaseType->getAs<RecordType>() && BaseType.isConstQualified()) { | ||||||||||
14752 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||||||||
14753 | << Context.getTagDeclType(ClassDecl) << 1 << Field->getDeclName(); | ||||||||||
14754 | Diag(Field->getLocation(), diag::note_declared_at); | ||||||||||
14755 | Invalid = true; | ||||||||||
14756 | continue; | ||||||||||
14757 | } | ||||||||||
14758 | |||||||||||
14759 | // Suppress assigning zero-width bitfields. | ||||||||||
14760 | if (Field->isZeroLengthBitField(Context)) | ||||||||||
14761 | continue; | ||||||||||
14762 | |||||||||||
14763 | QualType FieldType = Field->getType().getNonReferenceType(); | ||||||||||
14764 | if (FieldType->isIncompleteArrayType()) { | ||||||||||
14765 | assert(ClassDecl->hasFlexibleArrayMember() &&(static_cast <bool> (ClassDecl->hasFlexibleArrayMember () && "Incomplete array type is not valid") ? void (0 ) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14766, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14766 | "Incomplete array type is not valid")(static_cast <bool> (ClassDecl->hasFlexibleArrayMember () && "Incomplete array type is not valid") ? void (0 ) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14766, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14767 | continue; | ||||||||||
14768 | } | ||||||||||
14769 | |||||||||||
14770 | // Build references to the field in the object we're copying from and to. | ||||||||||
14771 | LookupResult MemberLookup(*this, Field->getDeclName(), Loc, | ||||||||||
14772 | LookupMemberName); | ||||||||||
14773 | MemberLookup.addDecl(Field); | ||||||||||
14774 | MemberLookup.resolveKind(); | ||||||||||
14775 | MemberBuilder From(MoveOther, OtherRefType, | ||||||||||
14776 | /*IsArrow=*/false, MemberLookup); | ||||||||||
14777 | MemberBuilder To(This, getCurrentThisType(), | ||||||||||
14778 | /*IsArrow=*/true, MemberLookup); | ||||||||||
14779 | |||||||||||
14780 | assert(!From.build(*this, Loc)->isLValue() && // could be xvalue or prvalue(static_cast <bool> (!From.build(*this, Loc)->isLValue () && "Member reference with rvalue base must be rvalue except for reference " "members, which aren't allowed for move assignment.") ? void (0) : __assert_fail ("!From.build(*this, Loc)->isLValue() && \"Member reference with rvalue base must be rvalue except for reference \" \"members, which aren't allowed for move assignment.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14782, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14781 | "Member reference with rvalue base must be rvalue except for reference "(static_cast <bool> (!From.build(*this, Loc)->isLValue () && "Member reference with rvalue base must be rvalue except for reference " "members, which aren't allowed for move assignment.") ? void (0) : __assert_fail ("!From.build(*this, Loc)->isLValue() && \"Member reference with rvalue base must be rvalue except for reference \" \"members, which aren't allowed for move assignment.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14782, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14782 | "members, which aren't allowed for move assignment.")(static_cast <bool> (!From.build(*this, Loc)->isLValue () && "Member reference with rvalue base must be rvalue except for reference " "members, which aren't allowed for move assignment.") ? void (0) : __assert_fail ("!From.build(*this, Loc)->isLValue() && \"Member reference with rvalue base must be rvalue except for reference \" \"members, which aren't allowed for move assignment.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14782, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14783 | |||||||||||
14784 | // Build the move of this field. | ||||||||||
14785 | StmtResult Move = buildSingleCopyAssign(*this, Loc, FieldType, | ||||||||||
14786 | To, From, | ||||||||||
14787 | /*CopyingBaseSubobject=*/false, | ||||||||||
14788 | /*Copying=*/false); | ||||||||||
14789 | if (Move.isInvalid()) { | ||||||||||
14790 | MoveAssignOperator->setInvalidDecl(); | ||||||||||
14791 | return; | ||||||||||
14792 | } | ||||||||||
14793 | |||||||||||
14794 | // Success! Record the copy. | ||||||||||
14795 | Statements.push_back(Move.getAs<Stmt>()); | ||||||||||
14796 | } | ||||||||||
14797 | |||||||||||
14798 | if (!Invalid) { | ||||||||||
14799 | // Add a "return *this;" | ||||||||||
14800 | ExprResult ThisObj = | ||||||||||
14801 | CreateBuiltinUnaryOp(Loc, UO_Deref, This.build(*this, Loc)); | ||||||||||
14802 | |||||||||||
14803 | StmtResult Return = BuildReturnStmt(Loc, ThisObj.get()); | ||||||||||
14804 | if (Return.isInvalid()) | ||||||||||
14805 | Invalid = true; | ||||||||||
14806 | else | ||||||||||
14807 | Statements.push_back(Return.getAs<Stmt>()); | ||||||||||
14808 | } | ||||||||||
14809 | |||||||||||
14810 | if (Invalid) { | ||||||||||
14811 | MoveAssignOperator->setInvalidDecl(); | ||||||||||
14812 | return; | ||||||||||
14813 | } | ||||||||||
14814 | |||||||||||
14815 | StmtResult Body; | ||||||||||
14816 | { | ||||||||||
14817 | CompoundScopeRAII CompoundScope(*this); | ||||||||||
14818 | Body = ActOnCompoundStmt(Loc, Loc, Statements, | ||||||||||
14819 | /*isStmtExpr=*/false); | ||||||||||
14820 | assert(!Body.isInvalid() && "Compound statement creation cannot fail")(static_cast <bool> (!Body.isInvalid() && "Compound statement creation cannot fail" ) ? void (0) : __assert_fail ("!Body.isInvalid() && \"Compound statement creation cannot fail\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14820, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14821 | } | ||||||||||
14822 | MoveAssignOperator->setBody(Body.getAs<Stmt>()); | ||||||||||
14823 | MoveAssignOperator->markUsed(Context); | ||||||||||
14824 | |||||||||||
14825 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
14826 | L->CompletedImplicitDefinition(MoveAssignOperator); | ||||||||||
14827 | } | ||||||||||
14828 | } | ||||||||||
14829 | |||||||||||
14830 | CXXConstructorDecl *Sema::DeclareImplicitCopyConstructor( | ||||||||||
14831 | CXXRecordDecl *ClassDecl) { | ||||||||||
14832 | // C++ [class.copy]p4: | ||||||||||
14833 | // If the class definition does not explicitly declare a copy | ||||||||||
14834 | // constructor, one is declared implicitly. | ||||||||||
14835 | assert(ClassDecl->needsImplicitCopyConstructor())(static_cast <bool> (ClassDecl->needsImplicitCopyConstructor ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitCopyConstructor()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14835, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14836 | |||||||||||
14837 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXCopyConstructor); | ||||||||||
14838 | if (DSM.isAlreadyBeingDeclared()) | ||||||||||
14839 | return nullptr; | ||||||||||
14840 | |||||||||||
14841 | QualType ClassType = Context.getTypeDeclType(ClassDecl); | ||||||||||
14842 | QualType ArgType = ClassType; | ||||||||||
14843 | bool Const = ClassDecl->implicitCopyConstructorHasConstParam(); | ||||||||||
14844 | if (Const) | ||||||||||
14845 | ArgType = ArgType.withConst(); | ||||||||||
14846 | |||||||||||
14847 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||||||||
14848 | if (AS != LangAS::Default) | ||||||||||
14849 | ArgType = Context.getAddrSpaceQualType(ArgType, AS); | ||||||||||
14850 | |||||||||||
14851 | ArgType = Context.getLValueReferenceType(ArgType); | ||||||||||
14852 | |||||||||||
14853 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||||||
14854 | CXXCopyConstructor, | ||||||||||
14855 | Const); | ||||||||||
14856 | |||||||||||
14857 | DeclarationName Name | ||||||||||
14858 | = Context.DeclarationNames.getCXXConstructorName( | ||||||||||
14859 | Context.getCanonicalType(ClassType)); | ||||||||||
14860 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||||||
14861 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||||||
14862 | |||||||||||
14863 | // An implicitly-declared copy constructor is an inline public | ||||||||||
14864 | // member of its class. | ||||||||||
14865 | CXXConstructorDecl *CopyConstructor = CXXConstructorDecl::Create( | ||||||||||
14866 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), /*TInfo=*/nullptr, | ||||||||||
14867 | ExplicitSpecifier(), | ||||||||||
14868 | /*isInline=*/true, | ||||||||||
14869 | /*isImplicitlyDeclared=*/true, | ||||||||||
14870 | Constexpr ? ConstexprSpecKind::Constexpr | ||||||||||
14871 | : ConstexprSpecKind::Unspecified); | ||||||||||
14872 | CopyConstructor->setAccess(AS_public); | ||||||||||
14873 | CopyConstructor->setDefaulted(); | ||||||||||
14874 | |||||||||||
14875 | if (getLangOpts().CUDA) { | ||||||||||
14876 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXCopyConstructor, | ||||||||||
14877 | CopyConstructor, | ||||||||||
14878 | /* ConstRHS */ Const, | ||||||||||
14879 | /* Diagnose */ false); | ||||||||||
14880 | } | ||||||||||
14881 | |||||||||||
14882 | setupImplicitSpecialMemberType(CopyConstructor, Context.VoidTy, ArgType); | ||||||||||
14883 | |||||||||||
14884 | // During template instantiation of special member functions we need a | ||||||||||
14885 | // reliable TypeSourceInfo for the parameter types in order to allow functions | ||||||||||
14886 | // to be substituted. | ||||||||||
14887 | TypeSourceInfo *TSI = nullptr; | ||||||||||
14888 | if (inTemplateInstantiation() && ClassDecl->isLambda()) | ||||||||||
14889 | TSI = Context.getTrivialTypeSourceInfo(ArgType); | ||||||||||
14890 | |||||||||||
14891 | // Add the parameter to the constructor. | ||||||||||
14892 | ParmVarDecl *FromParam = | ||||||||||
14893 | ParmVarDecl::Create(Context, CopyConstructor, ClassLoc, ClassLoc, | ||||||||||
14894 | /*IdentifierInfo=*/nullptr, ArgType, | ||||||||||
14895 | /*TInfo=*/TSI, SC_None, nullptr); | ||||||||||
14896 | CopyConstructor->setParams(FromParam); | ||||||||||
14897 | |||||||||||
14898 | CopyConstructor->setTrivial( | ||||||||||
14899 | ClassDecl->needsOverloadResolutionForCopyConstructor() | ||||||||||
14900 | ? SpecialMemberIsTrivial(CopyConstructor, CXXCopyConstructor) | ||||||||||
14901 | : ClassDecl->hasTrivialCopyConstructor()); | ||||||||||
14902 | |||||||||||
14903 | CopyConstructor->setTrivialForCall( | ||||||||||
14904 | ClassDecl->hasAttr<TrivialABIAttr>() || | ||||||||||
14905 | (ClassDecl->needsOverloadResolutionForCopyConstructor() | ||||||||||
14906 | ? SpecialMemberIsTrivial(CopyConstructor, CXXCopyConstructor, | ||||||||||
14907 | TAH_ConsiderTrivialABI) | ||||||||||
14908 | : ClassDecl->hasTrivialCopyConstructorForCall())); | ||||||||||
14909 | |||||||||||
14910 | // Note that we have declared this constructor. | ||||||||||
14911 | ++getASTContext().NumImplicitCopyConstructorsDeclared; | ||||||||||
14912 | |||||||||||
14913 | Scope *S = getScopeForContext(ClassDecl); | ||||||||||
14914 | CheckImplicitSpecialMemberDeclaration(S, CopyConstructor); | ||||||||||
14915 | |||||||||||
14916 | if (ShouldDeleteSpecialMember(CopyConstructor, CXXCopyConstructor)) { | ||||||||||
14917 | ClassDecl->setImplicitCopyConstructorIsDeleted(); | ||||||||||
14918 | SetDeclDeleted(CopyConstructor, ClassLoc); | ||||||||||
14919 | } | ||||||||||
14920 | |||||||||||
14921 | if (S) | ||||||||||
14922 | PushOnScopeChains(CopyConstructor, S, false); | ||||||||||
14923 | ClassDecl->addDecl(CopyConstructor); | ||||||||||
14924 | |||||||||||
14925 | return CopyConstructor; | ||||||||||
14926 | } | ||||||||||
14927 | |||||||||||
14928 | void Sema::DefineImplicitCopyConstructor(SourceLocation CurrentLocation, | ||||||||||
14929 | CXXConstructorDecl *CopyConstructor) { | ||||||||||
14930 | assert((CopyConstructor->isDefaulted() &&(static_cast <bool> ((CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? void (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14934, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14931 | CopyConstructor->isCopyConstructor() &&(static_cast <bool> ((CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? void (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14934, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14932 | !CopyConstructor->doesThisDeclarationHaveABody() &&(static_cast <bool> ((CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? void (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14934, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14933 | !CopyConstructor->isDeleted()) &&(static_cast <bool> ((CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? void (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14934, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
14934 | "DefineImplicitCopyConstructor - call it for implicit copy ctor")(static_cast <bool> ((CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? void (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14934, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14935 | if (CopyConstructor->willHaveBody() || CopyConstructor->isInvalidDecl()) | ||||||||||
14936 | return; | ||||||||||
14937 | |||||||||||
14938 | CXXRecordDecl *ClassDecl = CopyConstructor->getParent(); | ||||||||||
14939 | assert(ClassDecl && "DefineImplicitCopyConstructor - invalid constructor")(static_cast <bool> (ClassDecl && "DefineImplicitCopyConstructor - invalid constructor" ) ? void (0) : __assert_fail ("ClassDecl && \"DefineImplicitCopyConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14939, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14940 | |||||||||||
14941 | SynthesizedFunctionScope Scope(*this, CopyConstructor); | ||||||||||
14942 | |||||||||||
14943 | // The exception specification is needed because we are defining the | ||||||||||
14944 | // function. | ||||||||||
14945 | ResolveExceptionSpec(CurrentLocation, | ||||||||||
14946 | CopyConstructor->getType()->castAs<FunctionProtoType>()); | ||||||||||
14947 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||||||
14948 | |||||||||||
14949 | // Add a context note for diagnostics produced after this point. | ||||||||||
14950 | Scope.addContextNote(CurrentLocation); | ||||||||||
14951 | |||||||||||
14952 | // C++11 [class.copy]p7: | ||||||||||
14953 | // The [definition of an implicitly declared copy constructor] is | ||||||||||
14954 | // deprecated if the class has a user-declared copy assignment operator | ||||||||||
14955 | // or a user-declared destructor. | ||||||||||
14956 | if (getLangOpts().CPlusPlus11 && CopyConstructor->isImplicit()) | ||||||||||
14957 | diagnoseDeprecatedCopyOperation(*this, CopyConstructor); | ||||||||||
14958 | |||||||||||
14959 | if (SetCtorInitializers(CopyConstructor, /*AnyErrors=*/false)) { | ||||||||||
14960 | CopyConstructor->setInvalidDecl(); | ||||||||||
14961 | } else { | ||||||||||
14962 | SourceLocation Loc = CopyConstructor->getEndLoc().isValid() | ||||||||||
14963 | ? CopyConstructor->getEndLoc() | ||||||||||
14964 | : CopyConstructor->getLocation(); | ||||||||||
14965 | Sema::CompoundScopeRAII CompoundScope(*this); | ||||||||||
14966 | CopyConstructor->setBody( | ||||||||||
14967 | ActOnCompoundStmt(Loc, Loc, None, /*isStmtExpr=*/false).getAs<Stmt>()); | ||||||||||
14968 | CopyConstructor->markUsed(Context); | ||||||||||
14969 | } | ||||||||||
14970 | |||||||||||
14971 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
14972 | L->CompletedImplicitDefinition(CopyConstructor); | ||||||||||
14973 | } | ||||||||||
14974 | } | ||||||||||
14975 | |||||||||||
14976 | CXXConstructorDecl *Sema::DeclareImplicitMoveConstructor( | ||||||||||
14977 | CXXRecordDecl *ClassDecl) { | ||||||||||
14978 | assert(ClassDecl->needsImplicitMoveConstructor())(static_cast <bool> (ClassDecl->needsImplicitMoveConstructor ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitMoveConstructor()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 14978, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
14979 | |||||||||||
14980 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXMoveConstructor); | ||||||||||
14981 | if (DSM.isAlreadyBeingDeclared()) | ||||||||||
14982 | return nullptr; | ||||||||||
14983 | |||||||||||
14984 | QualType ClassType = Context.getTypeDeclType(ClassDecl); | ||||||||||
14985 | |||||||||||
14986 | QualType ArgType = ClassType; | ||||||||||
14987 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||||||||
14988 | if (AS != LangAS::Default) | ||||||||||
14989 | ArgType = Context.getAddrSpaceQualType(ClassType, AS); | ||||||||||
14990 | ArgType = Context.getRValueReferenceType(ArgType); | ||||||||||
14991 | |||||||||||
14992 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||||||
14993 | CXXMoveConstructor, | ||||||||||
14994 | false); | ||||||||||
14995 | |||||||||||
14996 | DeclarationName Name | ||||||||||
14997 | = Context.DeclarationNames.getCXXConstructorName( | ||||||||||
14998 | Context.getCanonicalType(ClassType)); | ||||||||||
14999 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||||||
15000 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||||||
15001 | |||||||||||
15002 | // C++11 [class.copy]p11: | ||||||||||
15003 | // An implicitly-declared copy/move constructor is an inline public | ||||||||||
15004 | // member of its class. | ||||||||||
15005 | CXXConstructorDecl *MoveConstructor = CXXConstructorDecl::Create( | ||||||||||
15006 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), /*TInfo=*/nullptr, | ||||||||||
15007 | ExplicitSpecifier(), | ||||||||||
15008 | /*isInline=*/true, | ||||||||||
15009 | /*isImplicitlyDeclared=*/true, | ||||||||||
15010 | Constexpr ? ConstexprSpecKind::Constexpr | ||||||||||
15011 | : ConstexprSpecKind::Unspecified); | ||||||||||
15012 | MoveConstructor->setAccess(AS_public); | ||||||||||
15013 | MoveConstructor->setDefaulted(); | ||||||||||
15014 | |||||||||||
15015 | if (getLangOpts().CUDA) { | ||||||||||
15016 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXMoveConstructor, | ||||||||||
15017 | MoveConstructor, | ||||||||||
15018 | /* ConstRHS */ false, | ||||||||||
15019 | /* Diagnose */ false); | ||||||||||
15020 | } | ||||||||||
15021 | |||||||||||
15022 | setupImplicitSpecialMemberType(MoveConstructor, Context.VoidTy, ArgType); | ||||||||||
15023 | |||||||||||
15024 | // Add the parameter to the constructor. | ||||||||||
15025 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, MoveConstructor, | ||||||||||
15026 | ClassLoc, ClassLoc, | ||||||||||
15027 | /*IdentifierInfo=*/nullptr, | ||||||||||
15028 | ArgType, /*TInfo=*/nullptr, | ||||||||||
15029 | SC_None, nullptr); | ||||||||||
15030 | MoveConstructor->setParams(FromParam); | ||||||||||
15031 | |||||||||||
15032 | MoveConstructor->setTrivial( | ||||||||||
15033 | ClassDecl->needsOverloadResolutionForMoveConstructor() | ||||||||||
15034 | ? SpecialMemberIsTrivial(MoveConstructor, CXXMoveConstructor) | ||||||||||
15035 | : ClassDecl->hasTrivialMoveConstructor()); | ||||||||||
15036 | |||||||||||
15037 | MoveConstructor->setTrivialForCall( | ||||||||||
15038 | ClassDecl->hasAttr<TrivialABIAttr>() || | ||||||||||
15039 | (ClassDecl->needsOverloadResolutionForMoveConstructor() | ||||||||||
15040 | ? SpecialMemberIsTrivial(MoveConstructor, CXXMoveConstructor, | ||||||||||
15041 | TAH_ConsiderTrivialABI) | ||||||||||
15042 | : ClassDecl->hasTrivialMoveConstructorForCall())); | ||||||||||
15043 | |||||||||||
15044 | // Note that we have declared this constructor. | ||||||||||
15045 | ++getASTContext().NumImplicitMoveConstructorsDeclared; | ||||||||||
15046 | |||||||||||
15047 | Scope *S = getScopeForContext(ClassDecl); | ||||||||||
15048 | CheckImplicitSpecialMemberDeclaration(S, MoveConstructor); | ||||||||||
15049 | |||||||||||
15050 | if (ShouldDeleteSpecialMember(MoveConstructor, CXXMoveConstructor)) { | ||||||||||
15051 | ClassDecl->setImplicitMoveConstructorIsDeleted(); | ||||||||||
15052 | SetDeclDeleted(MoveConstructor, ClassLoc); | ||||||||||
15053 | } | ||||||||||
15054 | |||||||||||
15055 | if (S) | ||||||||||
15056 | PushOnScopeChains(MoveConstructor, S, false); | ||||||||||
15057 | ClassDecl->addDecl(MoveConstructor); | ||||||||||
15058 | |||||||||||
15059 | return MoveConstructor; | ||||||||||
15060 | } | ||||||||||
15061 | |||||||||||
15062 | void Sema::DefineImplicitMoveConstructor(SourceLocation CurrentLocation, | ||||||||||
15063 | CXXConstructorDecl *MoveConstructor) { | ||||||||||
15064 | assert((MoveConstructor->isDefaulted() &&(static_cast <bool> ((MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? void (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15068, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15065 | MoveConstructor->isMoveConstructor() &&(static_cast <bool> ((MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? void (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15068, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15066 | !MoveConstructor->doesThisDeclarationHaveABody() &&(static_cast <bool> ((MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? void (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15068, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15067 | !MoveConstructor->isDeleted()) &&(static_cast <bool> ((MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? void (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15068, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15068 | "DefineImplicitMoveConstructor - call it for implicit move ctor")(static_cast <bool> ((MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? void (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15068, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15069 | if (MoveConstructor->willHaveBody() || MoveConstructor->isInvalidDecl()) | ||||||||||
15070 | return; | ||||||||||
15071 | |||||||||||
15072 | CXXRecordDecl *ClassDecl = MoveConstructor->getParent(); | ||||||||||
15073 | assert(ClassDecl && "DefineImplicitMoveConstructor - invalid constructor")(static_cast <bool> (ClassDecl && "DefineImplicitMoveConstructor - invalid constructor" ) ? void (0) : __assert_fail ("ClassDecl && \"DefineImplicitMoveConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15073, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15074 | |||||||||||
15075 | SynthesizedFunctionScope Scope(*this, MoveConstructor); | ||||||||||
15076 | |||||||||||
15077 | // The exception specification is needed because we are defining the | ||||||||||
15078 | // function. | ||||||||||
15079 | ResolveExceptionSpec(CurrentLocation, | ||||||||||
15080 | MoveConstructor->getType()->castAs<FunctionProtoType>()); | ||||||||||
15081 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||||||
15082 | |||||||||||
15083 | // Add a context note for diagnostics produced after this point. | ||||||||||
15084 | Scope.addContextNote(CurrentLocation); | ||||||||||
15085 | |||||||||||
15086 | if (SetCtorInitializers(MoveConstructor, /*AnyErrors=*/false)) { | ||||||||||
15087 | MoveConstructor->setInvalidDecl(); | ||||||||||
15088 | } else { | ||||||||||
15089 | SourceLocation Loc = MoveConstructor->getEndLoc().isValid() | ||||||||||
15090 | ? MoveConstructor->getEndLoc() | ||||||||||
15091 | : MoveConstructor->getLocation(); | ||||||||||
15092 | Sema::CompoundScopeRAII CompoundScope(*this); | ||||||||||
15093 | MoveConstructor->setBody(ActOnCompoundStmt( | ||||||||||
15094 | Loc, Loc, None, /*isStmtExpr=*/ false).getAs<Stmt>()); | ||||||||||
15095 | MoveConstructor->markUsed(Context); | ||||||||||
15096 | } | ||||||||||
15097 | |||||||||||
15098 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
15099 | L->CompletedImplicitDefinition(MoveConstructor); | ||||||||||
15100 | } | ||||||||||
15101 | } | ||||||||||
15102 | |||||||||||
15103 | bool Sema::isImplicitlyDeleted(FunctionDecl *FD) { | ||||||||||
15104 | return FD->isDeleted() && FD->isDefaulted() && isa<CXXMethodDecl>(FD); | ||||||||||
15105 | } | ||||||||||
15106 | |||||||||||
15107 | void Sema::DefineImplicitLambdaToFunctionPointerConversion( | ||||||||||
15108 | SourceLocation CurrentLocation, | ||||||||||
15109 | CXXConversionDecl *Conv) { | ||||||||||
15110 | SynthesizedFunctionScope Scope(*this, Conv); | ||||||||||
15111 | assert(!Conv->getReturnType()->isUndeducedType())(static_cast <bool> (!Conv->getReturnType()->isUndeducedType ()) ? void (0) : __assert_fail ("!Conv->getReturnType()->isUndeducedType()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15111, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15112 | |||||||||||
15113 | QualType ConvRT = Conv->getType()->castAs<FunctionType>()->getReturnType(); | ||||||||||
15114 | CallingConv CC = | ||||||||||
15115 | ConvRT->getPointeeType()->castAs<FunctionType>()->getCallConv(); | ||||||||||
15116 | |||||||||||
15117 | CXXRecordDecl *Lambda = Conv->getParent(); | ||||||||||
15118 | FunctionDecl *CallOp = Lambda->getLambdaCallOperator(); | ||||||||||
15119 | FunctionDecl *Invoker = Lambda->getLambdaStaticInvoker(CC); | ||||||||||
15120 | |||||||||||
15121 | if (auto *TemplateArgs = Conv->getTemplateSpecializationArgs()) { | ||||||||||
15122 | CallOp = InstantiateFunctionDeclaration( | ||||||||||
15123 | CallOp->getDescribedFunctionTemplate(), TemplateArgs, CurrentLocation); | ||||||||||
15124 | if (!CallOp) | ||||||||||
15125 | return; | ||||||||||
15126 | |||||||||||
15127 | Invoker = InstantiateFunctionDeclaration( | ||||||||||
15128 | Invoker->getDescribedFunctionTemplate(), TemplateArgs, CurrentLocation); | ||||||||||
15129 | if (!Invoker) | ||||||||||
15130 | return; | ||||||||||
15131 | } | ||||||||||
15132 | |||||||||||
15133 | if (CallOp->isInvalidDecl()) | ||||||||||
15134 | return; | ||||||||||
15135 | |||||||||||
15136 | // Mark the call operator referenced (and add to pending instantiations | ||||||||||
15137 | // if necessary). | ||||||||||
15138 | // For both the conversion and static-invoker template specializations | ||||||||||
15139 | // we construct their body's in this function, so no need to add them | ||||||||||
15140 | // to the PendingInstantiations. | ||||||||||
15141 | MarkFunctionReferenced(CurrentLocation, CallOp); | ||||||||||
15142 | |||||||||||
15143 | // Fill in the __invoke function with a dummy implementation. IR generation | ||||||||||
15144 | // will fill in the actual details. Update its type in case it contained | ||||||||||
15145 | // an 'auto'. | ||||||||||
15146 | Invoker->markUsed(Context); | ||||||||||
15147 | Invoker->setReferenced(); | ||||||||||
15148 | Invoker->setType(Conv->getReturnType()->getPointeeType()); | ||||||||||
15149 | Invoker->setBody(new (Context) CompoundStmt(Conv->getLocation())); | ||||||||||
15150 | |||||||||||
15151 | // Construct the body of the conversion function { return __invoke; }. | ||||||||||
15152 | Expr *FunctionRef = BuildDeclRefExpr(Invoker, Invoker->getType(), | ||||||||||
15153 | VK_LValue, Conv->getLocation()); | ||||||||||
15154 | assert(FunctionRef && "Can't refer to __invoke function?")(static_cast <bool> (FunctionRef && "Can't refer to __invoke function?" ) ? void (0) : __assert_fail ("FunctionRef && \"Can't refer to __invoke function?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15154, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15155 | Stmt *Return = BuildReturnStmt(Conv->getLocation(), FunctionRef).get(); | ||||||||||
15156 | Conv->setBody(CompoundStmt::Create(Context, Return, Conv->getLocation(), | ||||||||||
15157 | Conv->getLocation())); | ||||||||||
15158 | Conv->markUsed(Context); | ||||||||||
15159 | Conv->setReferenced(); | ||||||||||
15160 | |||||||||||
15161 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
15162 | L->CompletedImplicitDefinition(Conv); | ||||||||||
15163 | L->CompletedImplicitDefinition(Invoker); | ||||||||||
15164 | } | ||||||||||
15165 | } | ||||||||||
15166 | |||||||||||
15167 | |||||||||||
15168 | |||||||||||
15169 | void Sema::DefineImplicitLambdaToBlockPointerConversion( | ||||||||||
15170 | SourceLocation CurrentLocation, | ||||||||||
15171 | CXXConversionDecl *Conv) | ||||||||||
15172 | { | ||||||||||
15173 | assert(!Conv->getParent()->isGenericLambda())(static_cast <bool> (!Conv->getParent()->isGenericLambda ()) ? void (0) : __assert_fail ("!Conv->getParent()->isGenericLambda()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15173, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15174 | |||||||||||
15175 | SynthesizedFunctionScope Scope(*this, Conv); | ||||||||||
15176 | |||||||||||
15177 | // Copy-initialize the lambda object as needed to capture it. | ||||||||||
15178 | Expr *This = ActOnCXXThis(CurrentLocation).get(); | ||||||||||
15179 | Expr *DerefThis =CreateBuiltinUnaryOp(CurrentLocation, UO_Deref, This).get(); | ||||||||||
15180 | |||||||||||
15181 | ExprResult BuildBlock = BuildBlockForLambdaConversion(CurrentLocation, | ||||||||||
15182 | Conv->getLocation(), | ||||||||||
15183 | Conv, DerefThis); | ||||||||||
15184 | |||||||||||
15185 | // If we're not under ARC, make sure we still get the _Block_copy/autorelease | ||||||||||
15186 | // behavior. Note that only the general conversion function does this | ||||||||||
15187 | // (since it's unusable otherwise); in the case where we inline the | ||||||||||
15188 | // block literal, it has block literal lifetime semantics. | ||||||||||
15189 | if (!BuildBlock.isInvalid() && !getLangOpts().ObjCAutoRefCount) | ||||||||||
15190 | BuildBlock = ImplicitCastExpr::Create( | ||||||||||
15191 | Context, BuildBlock.get()->getType(), CK_CopyAndAutoreleaseBlockObject, | ||||||||||
15192 | BuildBlock.get(), nullptr, VK_PRValue, FPOptionsOverride()); | ||||||||||
15193 | |||||||||||
15194 | if (BuildBlock.isInvalid()) { | ||||||||||
15195 | Diag(CurrentLocation, diag::note_lambda_to_block_conv); | ||||||||||
15196 | Conv->setInvalidDecl(); | ||||||||||
15197 | return; | ||||||||||
15198 | } | ||||||||||
15199 | |||||||||||
15200 | // Create the return statement that returns the block from the conversion | ||||||||||
15201 | // function. | ||||||||||
15202 | StmtResult Return = BuildReturnStmt(Conv->getLocation(), BuildBlock.get()); | ||||||||||
15203 | if (Return.isInvalid()) { | ||||||||||
15204 | Diag(CurrentLocation, diag::note_lambda_to_block_conv); | ||||||||||
15205 | Conv->setInvalidDecl(); | ||||||||||
15206 | return; | ||||||||||
15207 | } | ||||||||||
15208 | |||||||||||
15209 | // Set the body of the conversion function. | ||||||||||
15210 | Stmt *ReturnS = Return.get(); | ||||||||||
15211 | Conv->setBody(CompoundStmt::Create(Context, ReturnS, Conv->getLocation(), | ||||||||||
15212 | Conv->getLocation())); | ||||||||||
15213 | Conv->markUsed(Context); | ||||||||||
15214 | |||||||||||
15215 | // We're done; notify the mutation listener, if any. | ||||||||||
15216 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||||||
15217 | L->CompletedImplicitDefinition(Conv); | ||||||||||
15218 | } | ||||||||||
15219 | } | ||||||||||
15220 | |||||||||||
15221 | /// Determine whether the given list arguments contains exactly one | ||||||||||
15222 | /// "real" (non-default) argument. | ||||||||||
15223 | static bool hasOneRealArgument(MultiExprArg Args) { | ||||||||||
15224 | switch (Args.size()) { | ||||||||||
15225 | case 0: | ||||||||||
15226 | return false; | ||||||||||
15227 | |||||||||||
15228 | default: | ||||||||||
15229 | if (!Args[1]->isDefaultArgument()) | ||||||||||
15230 | return false; | ||||||||||
15231 | |||||||||||
15232 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||||||
15233 | case 1: | ||||||||||
15234 | return !Args[0]->isDefaultArgument(); | ||||||||||
15235 | } | ||||||||||
15236 | |||||||||||
15237 | return false; | ||||||||||
15238 | } | ||||||||||
15239 | |||||||||||
15240 | ExprResult | ||||||||||
15241 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||||||||
15242 | NamedDecl *FoundDecl, | ||||||||||
15243 | CXXConstructorDecl *Constructor, | ||||||||||
15244 | MultiExprArg ExprArgs, | ||||||||||
15245 | bool HadMultipleCandidates, | ||||||||||
15246 | bool IsListInitialization, | ||||||||||
15247 | bool IsStdInitListInitialization, | ||||||||||
15248 | bool RequiresZeroInit, | ||||||||||
15249 | unsigned ConstructKind, | ||||||||||
15250 | SourceRange ParenRange) { | ||||||||||
15251 | bool Elidable = false; | ||||||||||
15252 | |||||||||||
15253 | // C++0x [class.copy]p34: | ||||||||||
15254 | // When certain criteria are met, an implementation is allowed to | ||||||||||
15255 | // omit the copy/move construction of a class object, even if the | ||||||||||
15256 | // copy/move constructor and/or destructor for the object have | ||||||||||
15257 | // side effects. [...] | ||||||||||
15258 | // - when a temporary class object that has not been bound to a | ||||||||||
15259 | // reference (12.2) would be copied/moved to a class object | ||||||||||
15260 | // with the same cv-unqualified type, the copy/move operation | ||||||||||
15261 | // can be omitted by constructing the temporary object | ||||||||||
15262 | // directly into the target of the omitted copy/move | ||||||||||
15263 | if (ConstructKind == CXXConstructExpr::CK_Complete && Constructor && | ||||||||||
15264 | Constructor->isCopyOrMoveConstructor() && hasOneRealArgument(ExprArgs)) { | ||||||||||
15265 | Expr *SubExpr = ExprArgs[0]; | ||||||||||
15266 | Elidable = SubExpr->isTemporaryObject( | ||||||||||
15267 | Context, cast<CXXRecordDecl>(FoundDecl->getDeclContext())); | ||||||||||
15268 | } | ||||||||||
15269 | |||||||||||
15270 | return BuildCXXConstructExpr(ConstructLoc, DeclInitType, | ||||||||||
15271 | FoundDecl, Constructor, | ||||||||||
15272 | Elidable, ExprArgs, HadMultipleCandidates, | ||||||||||
15273 | IsListInitialization, | ||||||||||
15274 | IsStdInitListInitialization, RequiresZeroInit, | ||||||||||
15275 | ConstructKind, ParenRange); | ||||||||||
15276 | } | ||||||||||
15277 | |||||||||||
15278 | ExprResult | ||||||||||
15279 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||||||||
15280 | NamedDecl *FoundDecl, | ||||||||||
15281 | CXXConstructorDecl *Constructor, | ||||||||||
15282 | bool Elidable, | ||||||||||
15283 | MultiExprArg ExprArgs, | ||||||||||
15284 | bool HadMultipleCandidates, | ||||||||||
15285 | bool IsListInitialization, | ||||||||||
15286 | bool IsStdInitListInitialization, | ||||||||||
15287 | bool RequiresZeroInit, | ||||||||||
15288 | unsigned ConstructKind, | ||||||||||
15289 | SourceRange ParenRange) { | ||||||||||
15290 | if (auto *Shadow = dyn_cast<ConstructorUsingShadowDecl>(FoundDecl)) { | ||||||||||
15291 | Constructor = findInheritingConstructor(ConstructLoc, Constructor, Shadow); | ||||||||||
15292 | if (DiagnoseUseOfDecl(Constructor, ConstructLoc)) | ||||||||||
15293 | return ExprError(); | ||||||||||
15294 | } | ||||||||||
15295 | |||||||||||
15296 | return BuildCXXConstructExpr( | ||||||||||
15297 | ConstructLoc, DeclInitType, Constructor, Elidable, ExprArgs, | ||||||||||
15298 | HadMultipleCandidates, IsListInitialization, IsStdInitListInitialization, | ||||||||||
15299 | RequiresZeroInit, ConstructKind, ParenRange); | ||||||||||
15300 | } | ||||||||||
15301 | |||||||||||
15302 | /// BuildCXXConstructExpr - Creates a complete call to a constructor, | ||||||||||
15303 | /// including handling of its default argument expressions. | ||||||||||
15304 | ExprResult | ||||||||||
15305 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||||||||
15306 | CXXConstructorDecl *Constructor, | ||||||||||
15307 | bool Elidable, | ||||||||||
15308 | MultiExprArg ExprArgs, | ||||||||||
15309 | bool HadMultipleCandidates, | ||||||||||
15310 | bool IsListInitialization, | ||||||||||
15311 | bool IsStdInitListInitialization, | ||||||||||
15312 | bool RequiresZeroInit, | ||||||||||
15313 | unsigned ConstructKind, | ||||||||||
15314 | SourceRange ParenRange) { | ||||||||||
15315 | assert(declaresSameEntity((static_cast <bool> (declaresSameEntity( Constructor-> getParent(), DeclInitType->getBaseElementTypeUnsafe()-> getAsCXXRecordDecl()) && "given constructor for wrong type" ) ? void (0) : __assert_fail ("declaresSameEntity( Constructor->getParent(), DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && \"given constructor for wrong type\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15318, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15316 | Constructor->getParent(),(static_cast <bool> (declaresSameEntity( Constructor-> getParent(), DeclInitType->getBaseElementTypeUnsafe()-> getAsCXXRecordDecl()) && "given constructor for wrong type" ) ? void (0) : __assert_fail ("declaresSameEntity( Constructor->getParent(), DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && \"given constructor for wrong type\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15318, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15317 | DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) &&(static_cast <bool> (declaresSameEntity( Constructor-> getParent(), DeclInitType->getBaseElementTypeUnsafe()-> getAsCXXRecordDecl()) && "given constructor for wrong type" ) ? void (0) : __assert_fail ("declaresSameEntity( Constructor->getParent(), DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && \"given constructor for wrong type\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15318, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15318 | "given constructor for wrong type")(static_cast <bool> (declaresSameEntity( Constructor-> getParent(), DeclInitType->getBaseElementTypeUnsafe()-> getAsCXXRecordDecl()) && "given constructor for wrong type" ) ? void (0) : __assert_fail ("declaresSameEntity( Constructor->getParent(), DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && \"given constructor for wrong type\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15318, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15319 | MarkFunctionReferenced(ConstructLoc, Constructor); | ||||||||||
15320 | if (getLangOpts().CUDA && !CheckCUDACall(ConstructLoc, Constructor)) | ||||||||||
15321 | return ExprError(); | ||||||||||
15322 | if (getLangOpts().SYCLIsDevice && | ||||||||||
15323 | !checkSYCLDeviceFunction(ConstructLoc, Constructor)) | ||||||||||
15324 | return ExprError(); | ||||||||||
15325 | |||||||||||
15326 | return CheckForImmediateInvocation( | ||||||||||
15327 | CXXConstructExpr::Create( | ||||||||||
15328 | Context, DeclInitType, ConstructLoc, Constructor, Elidable, ExprArgs, | ||||||||||
15329 | HadMultipleCandidates, IsListInitialization, | ||||||||||
15330 | IsStdInitListInitialization, RequiresZeroInit, | ||||||||||
15331 | static_cast<CXXConstructExpr::ConstructionKind>(ConstructKind), | ||||||||||
15332 | ParenRange), | ||||||||||
15333 | Constructor); | ||||||||||
15334 | } | ||||||||||
15335 | |||||||||||
15336 | ExprResult Sema::BuildCXXDefaultInitExpr(SourceLocation Loc, FieldDecl *Field) { | ||||||||||
15337 | assert(Field->hasInClassInitializer())(static_cast <bool> (Field->hasInClassInitializer()) ? void (0) : __assert_fail ("Field->hasInClassInitializer()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15337, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15338 | |||||||||||
15339 | // If we already have the in-class initializer nothing needs to be done. | ||||||||||
15340 | if (Field->getInClassInitializer()) | ||||||||||
15341 | return CXXDefaultInitExpr::Create(Context, Loc, Field, CurContext); | ||||||||||
15342 | |||||||||||
15343 | // If we might have already tried and failed to instantiate, don't try again. | ||||||||||
15344 | if (Field->isInvalidDecl()) | ||||||||||
15345 | return ExprError(); | ||||||||||
15346 | |||||||||||
15347 | // Maybe we haven't instantiated the in-class initializer. Go check the | ||||||||||
15348 | // pattern FieldDecl to see if it has one. | ||||||||||
15349 | CXXRecordDecl *ParentRD = cast<CXXRecordDecl>(Field->getParent()); | ||||||||||
15350 | |||||||||||
15351 | if (isTemplateInstantiation(ParentRD->getTemplateSpecializationKind())) { | ||||||||||
15352 | CXXRecordDecl *ClassPattern = ParentRD->getTemplateInstantiationPattern(); | ||||||||||
15353 | DeclContext::lookup_result Lookup = | ||||||||||
15354 | ClassPattern->lookup(Field->getDeclName()); | ||||||||||
15355 | |||||||||||
15356 | FieldDecl *Pattern = nullptr; | ||||||||||
15357 | for (auto L : Lookup) { | ||||||||||
15358 | if (isa<FieldDecl>(L)) { | ||||||||||
15359 | Pattern = cast<FieldDecl>(L); | ||||||||||
15360 | break; | ||||||||||
15361 | } | ||||||||||
15362 | } | ||||||||||
15363 | assert(Pattern && "We must have set the Pattern!")(static_cast <bool> (Pattern && "We must have set the Pattern!" ) ? void (0) : __assert_fail ("Pattern && \"We must have set the Pattern!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15363, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15364 | |||||||||||
15365 | if (!Pattern->hasInClassInitializer() || | ||||||||||
15366 | InstantiateInClassInitializer(Loc, Field, Pattern, | ||||||||||
15367 | getTemplateInstantiationArgs(Field))) { | ||||||||||
15368 | // Don't diagnose this again. | ||||||||||
15369 | Field->setInvalidDecl(); | ||||||||||
15370 | return ExprError(); | ||||||||||
15371 | } | ||||||||||
15372 | return CXXDefaultInitExpr::Create(Context, Loc, Field, CurContext); | ||||||||||
15373 | } | ||||||||||
15374 | |||||||||||
15375 | // DR1351: | ||||||||||
15376 | // If the brace-or-equal-initializer of a non-static data member | ||||||||||
15377 | // invokes a defaulted default constructor of its class or of an | ||||||||||
15378 | // enclosing class in a potentially evaluated subexpression, the | ||||||||||
15379 | // program is ill-formed. | ||||||||||
15380 | // | ||||||||||
15381 | // This resolution is unworkable: the exception specification of the | ||||||||||
15382 | // default constructor can be needed in an unevaluated context, in | ||||||||||
15383 | // particular, in the operand of a noexcept-expression, and we can be | ||||||||||
15384 | // unable to compute an exception specification for an enclosed class. | ||||||||||
15385 | // | ||||||||||
15386 | // Any attempt to resolve the exception specification of a defaulted default | ||||||||||
15387 | // constructor before the initializer is lexically complete will ultimately | ||||||||||
15388 | // come here at which point we can diagnose it. | ||||||||||
15389 | RecordDecl *OutermostClass = ParentRD->getOuterLexicalRecordContext(); | ||||||||||
15390 | Diag(Loc, diag::err_default_member_initializer_not_yet_parsed) | ||||||||||
15391 | << OutermostClass << Field; | ||||||||||
15392 | Diag(Field->getEndLoc(), | ||||||||||
15393 | diag::note_default_member_initializer_not_yet_parsed); | ||||||||||
15394 | // Recover by marking the field invalid, unless we're in a SFINAE context. | ||||||||||
15395 | if (!isSFINAEContext()) | ||||||||||
15396 | Field->setInvalidDecl(); | ||||||||||
15397 | return ExprError(); | ||||||||||
15398 | } | ||||||||||
15399 | |||||||||||
15400 | void Sema::FinalizeVarWithDestructor(VarDecl *VD, const RecordType *Record) { | ||||||||||
15401 | if (VD->isInvalidDecl()) return; | ||||||||||
15402 | // If initializing the variable failed, don't also diagnose problems with | ||||||||||
15403 | // the desctructor, they're likely related. | ||||||||||
15404 | if (VD->getInit() && VD->getInit()->containsErrors()) | ||||||||||
15405 | return; | ||||||||||
15406 | |||||||||||
15407 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(Record->getDecl()); | ||||||||||
15408 | if (ClassDecl->isInvalidDecl()) return; | ||||||||||
15409 | if (ClassDecl->hasIrrelevantDestructor()) return; | ||||||||||
15410 | if (ClassDecl->isDependentContext()) return; | ||||||||||
15411 | |||||||||||
15412 | if (VD->isNoDestroy(getASTContext())) | ||||||||||
15413 | return; | ||||||||||
15414 | |||||||||||
15415 | CXXDestructorDecl *Destructor = LookupDestructor(ClassDecl); | ||||||||||
15416 | |||||||||||
15417 | // If this is an array, we'll require the destructor during initialization, so | ||||||||||
15418 | // we can skip over this. We still want to emit exit-time destructor warnings | ||||||||||
15419 | // though. | ||||||||||
15420 | if (!VD->getType()->isArrayType()) { | ||||||||||
15421 | MarkFunctionReferenced(VD->getLocation(), Destructor); | ||||||||||
15422 | CheckDestructorAccess(VD->getLocation(), Destructor, | ||||||||||
15423 | PDiag(diag::err_access_dtor_var) | ||||||||||
15424 | << VD->getDeclName() << VD->getType()); | ||||||||||
15425 | DiagnoseUseOfDecl(Destructor, VD->getLocation()); | ||||||||||
15426 | } | ||||||||||
15427 | |||||||||||
15428 | if (Destructor->isTrivial()) return; | ||||||||||
15429 | |||||||||||
15430 | // If the destructor is constexpr, check whether the variable has constant | ||||||||||
15431 | // destruction now. | ||||||||||
15432 | if (Destructor->isConstexpr()) { | ||||||||||
15433 | bool HasConstantInit = false; | ||||||||||
15434 | if (VD->getInit() && !VD->getInit()->isValueDependent()) | ||||||||||
15435 | HasConstantInit = VD->evaluateValue(); | ||||||||||
15436 | SmallVector<PartialDiagnosticAt, 8> Notes; | ||||||||||
15437 | if (!VD->evaluateDestruction(Notes) && VD->isConstexpr() && | ||||||||||
15438 | HasConstantInit) { | ||||||||||
15439 | Diag(VD->getLocation(), | ||||||||||
15440 | diag::err_constexpr_var_requires_const_destruction) << VD; | ||||||||||
15441 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) | ||||||||||
15442 | Diag(Notes[I].first, Notes[I].second); | ||||||||||
15443 | } | ||||||||||
15444 | } | ||||||||||
15445 | |||||||||||
15446 | if (!VD->hasGlobalStorage()) return; | ||||||||||
15447 | |||||||||||
15448 | // Emit warning for non-trivial dtor in global scope (a real global, | ||||||||||
15449 | // class-static, function-static). | ||||||||||
15450 | Diag(VD->getLocation(), diag::warn_exit_time_destructor); | ||||||||||
15451 | |||||||||||
15452 | // TODO: this should be re-enabled for static locals by !CXAAtExit | ||||||||||
15453 | if (!VD->isStaticLocal()) | ||||||||||
15454 | Diag(VD->getLocation(), diag::warn_global_destructor); | ||||||||||
15455 | } | ||||||||||
15456 | |||||||||||
15457 | /// Given a constructor and the set of arguments provided for the | ||||||||||
15458 | /// constructor, convert the arguments and add any required default arguments | ||||||||||
15459 | /// to form a proper call to this constructor. | ||||||||||
15460 | /// | ||||||||||
15461 | /// \returns true if an error occurred, false otherwise. | ||||||||||
15462 | bool Sema::CompleteConstructorCall(CXXConstructorDecl *Constructor, | ||||||||||
15463 | QualType DeclInitType, MultiExprArg ArgsPtr, | ||||||||||
15464 | SourceLocation Loc, | ||||||||||
15465 | SmallVectorImpl<Expr *> &ConvertedArgs, | ||||||||||
15466 | bool AllowExplicit, | ||||||||||
15467 | bool IsListInitialization) { | ||||||||||
15468 | // FIXME: This duplicates a lot of code from Sema::ConvertArgumentsForCall. | ||||||||||
15469 | unsigned NumArgs = ArgsPtr.size(); | ||||||||||
15470 | Expr **Args = ArgsPtr.data(); | ||||||||||
15471 | |||||||||||
15472 | const auto *Proto = Constructor->getType()->castAs<FunctionProtoType>(); | ||||||||||
15473 | unsigned NumParams = Proto->getNumParams(); | ||||||||||
15474 | |||||||||||
15475 | // If too few arguments are available, we'll fill in the rest with defaults. | ||||||||||
15476 | if (NumArgs < NumParams) | ||||||||||
15477 | ConvertedArgs.reserve(NumParams); | ||||||||||
15478 | else | ||||||||||
15479 | ConvertedArgs.reserve(NumArgs); | ||||||||||
15480 | |||||||||||
15481 | VariadicCallType CallType = | ||||||||||
15482 | Proto->isVariadic() ? VariadicConstructor : VariadicDoesNotApply; | ||||||||||
15483 | SmallVector<Expr *, 8> AllArgs; | ||||||||||
15484 | bool Invalid = GatherArgumentsForCall(Loc, Constructor, | ||||||||||
15485 | Proto, 0, | ||||||||||
15486 | llvm::makeArrayRef(Args, NumArgs), | ||||||||||
15487 | AllArgs, | ||||||||||
15488 | CallType, AllowExplicit, | ||||||||||
15489 | IsListInitialization); | ||||||||||
15490 | ConvertedArgs.append(AllArgs.begin(), AllArgs.end()); | ||||||||||
15491 | |||||||||||
15492 | DiagnoseSentinelCalls(Constructor, Loc, AllArgs); | ||||||||||
15493 | |||||||||||
15494 | CheckConstructorCall(Constructor, DeclInitType, | ||||||||||
15495 | llvm::makeArrayRef(AllArgs.data(), AllArgs.size()), | ||||||||||
15496 | Proto, Loc); | ||||||||||
15497 | |||||||||||
15498 | return Invalid; | ||||||||||
15499 | } | ||||||||||
15500 | |||||||||||
15501 | static inline bool | ||||||||||
15502 | CheckOperatorNewDeleteDeclarationScope(Sema &SemaRef, | ||||||||||
15503 | const FunctionDecl *FnDecl) { | ||||||||||
15504 | const DeclContext *DC = FnDecl->getDeclContext()->getRedeclContext(); | ||||||||||
15505 | if (isa<NamespaceDecl>(DC)) { | ||||||||||
15506 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||||||
15507 | diag::err_operator_new_delete_declared_in_namespace) | ||||||||||
15508 | << FnDecl->getDeclName(); | ||||||||||
15509 | } | ||||||||||
15510 | |||||||||||
15511 | if (isa<TranslationUnitDecl>(DC) && | ||||||||||
15512 | FnDecl->getStorageClass() == SC_Static) { | ||||||||||
15513 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||||||
15514 | diag::err_operator_new_delete_declared_static) | ||||||||||
15515 | << FnDecl->getDeclName(); | ||||||||||
15516 | } | ||||||||||
15517 | |||||||||||
15518 | return false; | ||||||||||
15519 | } | ||||||||||
15520 | |||||||||||
15521 | static CanQualType RemoveAddressSpaceFromPtr(Sema &SemaRef, | ||||||||||
15522 | const PointerType *PtrTy) { | ||||||||||
15523 | auto &Ctx = SemaRef.Context; | ||||||||||
15524 | Qualifiers PtrQuals = PtrTy->getPointeeType().getQualifiers(); | ||||||||||
15525 | PtrQuals.removeAddressSpace(); | ||||||||||
15526 | return Ctx.getPointerType(Ctx.getCanonicalType(Ctx.getQualifiedType( | ||||||||||
15527 | PtrTy->getPointeeType().getUnqualifiedType(), PtrQuals))); | ||||||||||
15528 | } | ||||||||||
15529 | |||||||||||
15530 | static inline bool | ||||||||||
15531 | CheckOperatorNewDeleteTypes(Sema &SemaRef, const FunctionDecl *FnDecl, | ||||||||||
15532 | CanQualType ExpectedResultType, | ||||||||||
15533 | CanQualType ExpectedFirstParamType, | ||||||||||
15534 | unsigned DependentParamTypeDiag, | ||||||||||
15535 | unsigned InvalidParamTypeDiag) { | ||||||||||
15536 | QualType ResultType = | ||||||||||
15537 | FnDecl->getType()->castAs<FunctionType>()->getReturnType(); | ||||||||||
15538 | |||||||||||
15539 | if (SemaRef.getLangOpts().OpenCLCPlusPlus) { | ||||||||||
15540 | // The operator is valid on any address space for OpenCL. | ||||||||||
15541 | // Drop address space from actual and expected result types. | ||||||||||
15542 | if (const auto *PtrTy = ResultType->getAs<PointerType>()) | ||||||||||
15543 | ResultType = RemoveAddressSpaceFromPtr(SemaRef, PtrTy); | ||||||||||
15544 | |||||||||||
15545 | if (auto ExpectedPtrTy = ExpectedResultType->getAs<PointerType>()) | ||||||||||
15546 | ExpectedResultType = RemoveAddressSpaceFromPtr(SemaRef, ExpectedPtrTy); | ||||||||||
15547 | } | ||||||||||
15548 | |||||||||||
15549 | // Check that the result type is what we expect. | ||||||||||
15550 | if (SemaRef.Context.getCanonicalType(ResultType) != ExpectedResultType) { | ||||||||||
15551 | // Reject even if the type is dependent; an operator delete function is | ||||||||||
15552 | // required to have a non-dependent result type. | ||||||||||
15553 | return SemaRef.Diag( | ||||||||||
15554 | FnDecl->getLocation(), | ||||||||||
15555 | ResultType->isDependentType() | ||||||||||
15556 | ? diag::err_operator_new_delete_dependent_result_type | ||||||||||
15557 | : diag::err_operator_new_delete_invalid_result_type) | ||||||||||
15558 | << FnDecl->getDeclName() << ExpectedResultType; | ||||||||||
15559 | } | ||||||||||
15560 | |||||||||||
15561 | // A function template must have at least 2 parameters. | ||||||||||
15562 | if (FnDecl->getDescribedFunctionTemplate() && FnDecl->getNumParams() < 2) | ||||||||||
15563 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||||||
15564 | diag::err_operator_new_delete_template_too_few_parameters) | ||||||||||
15565 | << FnDecl->getDeclName(); | ||||||||||
15566 | |||||||||||
15567 | // The function decl must have at least 1 parameter. | ||||||||||
15568 | if (FnDecl->getNumParams() == 0) | ||||||||||
15569 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||||||
15570 | diag::err_operator_new_delete_too_few_parameters) | ||||||||||
15571 | << FnDecl->getDeclName(); | ||||||||||
15572 | |||||||||||
15573 | QualType FirstParamType = FnDecl->getParamDecl(0)->getType(); | ||||||||||
15574 | if (SemaRef.getLangOpts().OpenCLCPlusPlus) { | ||||||||||
15575 | // The operator is valid on any address space for OpenCL. | ||||||||||
15576 | // Drop address space from actual and expected first parameter types. | ||||||||||
15577 | if (const auto *PtrTy = | ||||||||||
15578 | FnDecl->getParamDecl(0)->getType()->getAs<PointerType>()) | ||||||||||
15579 | FirstParamType = RemoveAddressSpaceFromPtr(SemaRef, PtrTy); | ||||||||||
15580 | |||||||||||
15581 | if (auto ExpectedPtrTy = ExpectedFirstParamType->getAs<PointerType>()) | ||||||||||
15582 | ExpectedFirstParamType = | ||||||||||
15583 | RemoveAddressSpaceFromPtr(SemaRef, ExpectedPtrTy); | ||||||||||
15584 | } | ||||||||||
15585 | |||||||||||
15586 | // Check that the first parameter type is what we expect. | ||||||||||
15587 | if (SemaRef.Context.getCanonicalType(FirstParamType).getUnqualifiedType() != | ||||||||||
15588 | ExpectedFirstParamType) { | ||||||||||
15589 | // The first parameter type is not allowed to be dependent. As a tentative | ||||||||||
15590 | // DR resolution, we allow a dependent parameter type if it is the right | ||||||||||
15591 | // type anyway, to allow destroying operator delete in class templates. | ||||||||||
15592 | return SemaRef.Diag(FnDecl->getLocation(), FirstParamType->isDependentType() | ||||||||||
15593 | ? DependentParamTypeDiag | ||||||||||
15594 | : InvalidParamTypeDiag) | ||||||||||
15595 | << FnDecl->getDeclName() << ExpectedFirstParamType; | ||||||||||
15596 | } | ||||||||||
15597 | |||||||||||
15598 | return false; | ||||||||||
15599 | } | ||||||||||
15600 | |||||||||||
15601 | static bool | ||||||||||
15602 | CheckOperatorNewDeclaration(Sema &SemaRef, const FunctionDecl *FnDecl) { | ||||||||||
15603 | // C++ [basic.stc.dynamic.allocation]p1: | ||||||||||
15604 | // A program is ill-formed if an allocation function is declared in a | ||||||||||
15605 | // namespace scope other than global scope or declared static in global | ||||||||||
15606 | // scope. | ||||||||||
15607 | if (CheckOperatorNewDeleteDeclarationScope(SemaRef, FnDecl)) | ||||||||||
15608 | return true; | ||||||||||
15609 | |||||||||||
15610 | CanQualType SizeTy = | ||||||||||
15611 | SemaRef.Context.getCanonicalType(SemaRef.Context.getSizeType()); | ||||||||||
15612 | |||||||||||
15613 | // C++ [basic.stc.dynamic.allocation]p1: | ||||||||||
15614 | // The return type shall be void*. The first parameter shall have type | ||||||||||
15615 | // std::size_t. | ||||||||||
15616 | if (CheckOperatorNewDeleteTypes(SemaRef, FnDecl, SemaRef.Context.VoidPtrTy, | ||||||||||
15617 | SizeTy, | ||||||||||
15618 | diag::err_operator_new_dependent_param_type, | ||||||||||
15619 | diag::err_operator_new_param_type)) | ||||||||||
15620 | return true; | ||||||||||
15621 | |||||||||||
15622 | // C++ [basic.stc.dynamic.allocation]p1: | ||||||||||
15623 | // The first parameter shall not have an associated default argument. | ||||||||||
15624 | if (FnDecl->getParamDecl(0)->hasDefaultArg()) | ||||||||||
15625 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||||||
15626 | diag::err_operator_new_default_arg) | ||||||||||
15627 | << FnDecl->getDeclName() << FnDecl->getParamDecl(0)->getDefaultArgRange(); | ||||||||||
15628 | |||||||||||
15629 | return false; | ||||||||||
15630 | } | ||||||||||
15631 | |||||||||||
15632 | static bool | ||||||||||
15633 | CheckOperatorDeleteDeclaration(Sema &SemaRef, FunctionDecl *FnDecl) { | ||||||||||
15634 | // C++ [basic.stc.dynamic.deallocation]p1: | ||||||||||
15635 | // A program is ill-formed if deallocation functions are declared in a | ||||||||||
15636 | // namespace scope other than global scope or declared static in global | ||||||||||
15637 | // scope. | ||||||||||
15638 | if (CheckOperatorNewDeleteDeclarationScope(SemaRef, FnDecl)) | ||||||||||
15639 | return true; | ||||||||||
15640 | |||||||||||
15641 | auto *MD = dyn_cast<CXXMethodDecl>(FnDecl); | ||||||||||
15642 | |||||||||||
15643 | // C++ P0722: | ||||||||||
15644 | // Within a class C, the first parameter of a destroying operator delete | ||||||||||
15645 | // shall be of type C *. The first parameter of any other deallocation | ||||||||||
15646 | // function shall be of type void *. | ||||||||||
15647 | CanQualType ExpectedFirstParamType = | ||||||||||
15648 | MD && MD->isDestroyingOperatorDelete() | ||||||||||
15649 | ? SemaRef.Context.getCanonicalType(SemaRef.Context.getPointerType( | ||||||||||
15650 | SemaRef.Context.getRecordType(MD->getParent()))) | ||||||||||
15651 | : SemaRef.Context.VoidPtrTy; | ||||||||||
15652 | |||||||||||
15653 | // C++ [basic.stc.dynamic.deallocation]p2: | ||||||||||
15654 | // Each deallocation function shall return void | ||||||||||
15655 | if (CheckOperatorNewDeleteTypes( | ||||||||||
15656 | SemaRef, FnDecl, SemaRef.Context.VoidTy, ExpectedFirstParamType, | ||||||||||
15657 | diag::err_operator_delete_dependent_param_type, | ||||||||||
15658 | diag::err_operator_delete_param_type)) | ||||||||||
15659 | return true; | ||||||||||
15660 | |||||||||||
15661 | // C++ P0722: | ||||||||||
15662 | // A destroying operator delete shall be a usual deallocation function. | ||||||||||
15663 | if (MD && !MD->getParent()->isDependentContext() && | ||||||||||
15664 | MD->isDestroyingOperatorDelete() && | ||||||||||
15665 | !SemaRef.isUsualDeallocationFunction(MD)) { | ||||||||||
15666 | SemaRef.Diag(MD->getLocation(), | ||||||||||
15667 | diag::err_destroying_operator_delete_not_usual); | ||||||||||
15668 | return true; | ||||||||||
15669 | } | ||||||||||
15670 | |||||||||||
15671 | return false; | ||||||||||
15672 | } | ||||||||||
15673 | |||||||||||
15674 | /// CheckOverloadedOperatorDeclaration - Check whether the declaration | ||||||||||
15675 | /// of this overloaded operator is well-formed. If so, returns false; | ||||||||||
15676 | /// otherwise, emits appropriate diagnostics and returns true. | ||||||||||
15677 | bool Sema::CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl) { | ||||||||||
15678 | assert(FnDecl && FnDecl->isOverloadedOperator() &&(static_cast <bool> (FnDecl && FnDecl->isOverloadedOperator () && "Expected an overloaded operator declaration") ? void (0) : __assert_fail ("FnDecl && FnDecl->isOverloadedOperator() && \"Expected an overloaded operator declaration\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15679, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15679 | "Expected an overloaded operator declaration")(static_cast <bool> (FnDecl && FnDecl->isOverloadedOperator () && "Expected an overloaded operator declaration") ? void (0) : __assert_fail ("FnDecl && FnDecl->isOverloadedOperator() && \"Expected an overloaded operator declaration\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15679, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15680 | |||||||||||
15681 | OverloadedOperatorKind Op = FnDecl->getOverloadedOperator(); | ||||||||||
15682 | |||||||||||
15683 | // C++ [over.oper]p5: | ||||||||||
15684 | // The allocation and deallocation functions, operator new, | ||||||||||
15685 | // operator new[], operator delete and operator delete[], are | ||||||||||
15686 | // described completely in 3.7.3. The attributes and restrictions | ||||||||||
15687 | // found in the rest of this subclause do not apply to them unless | ||||||||||
15688 | // explicitly stated in 3.7.3. | ||||||||||
15689 | if (Op == OO_Delete || Op == OO_Array_Delete) | ||||||||||
15690 | return CheckOperatorDeleteDeclaration(*this, FnDecl); | ||||||||||
15691 | |||||||||||
15692 | if (Op == OO_New || Op == OO_Array_New) | ||||||||||
15693 | return CheckOperatorNewDeclaration(*this, FnDecl); | ||||||||||
15694 | |||||||||||
15695 | // C++ [over.oper]p6: | ||||||||||
15696 | // An operator function shall either be a non-static member | ||||||||||
15697 | // function or be a non-member function and have at least one | ||||||||||
15698 | // parameter whose type is a class, a reference to a class, an | ||||||||||
15699 | // enumeration, or a reference to an enumeration. | ||||||||||
15700 | if (CXXMethodDecl *MethodDecl = dyn_cast<CXXMethodDecl>(FnDecl)) { | ||||||||||
15701 | if (MethodDecl->isStatic()) | ||||||||||
15702 | return Diag(FnDecl->getLocation(), | ||||||||||
15703 | diag::err_operator_overload_static) << FnDecl->getDeclName(); | ||||||||||
15704 | } else { | ||||||||||
15705 | bool ClassOrEnumParam = false; | ||||||||||
15706 | for (auto Param : FnDecl->parameters()) { | ||||||||||
15707 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||||||||
15708 | if (ParamType->isDependentType() || ParamType->isRecordType() || | ||||||||||
15709 | ParamType->isEnumeralType()) { | ||||||||||
15710 | ClassOrEnumParam = true; | ||||||||||
15711 | break; | ||||||||||
15712 | } | ||||||||||
15713 | } | ||||||||||
15714 | |||||||||||
15715 | if (!ClassOrEnumParam) | ||||||||||
15716 | return Diag(FnDecl->getLocation(), | ||||||||||
15717 | diag::err_operator_overload_needs_class_or_enum) | ||||||||||
15718 | << FnDecl->getDeclName(); | ||||||||||
15719 | } | ||||||||||
15720 | |||||||||||
15721 | // C++ [over.oper]p8: | ||||||||||
15722 | // An operator function cannot have default arguments (8.3.6), | ||||||||||
15723 | // except where explicitly stated below. | ||||||||||
15724 | // | ||||||||||
15725 | // Only the function-call operator allows default arguments | ||||||||||
15726 | // (C++ [over.call]p1). | ||||||||||
15727 | if (Op != OO_Call) { | ||||||||||
15728 | for (auto Param : FnDecl->parameters()) { | ||||||||||
15729 | if (Param->hasDefaultArg()) | ||||||||||
15730 | return Diag(Param->getLocation(), | ||||||||||
15731 | diag::err_operator_overload_default_arg) | ||||||||||
15732 | << FnDecl->getDeclName() << Param->getDefaultArgRange(); | ||||||||||
15733 | } | ||||||||||
15734 | } | ||||||||||
15735 | |||||||||||
15736 | static const bool OperatorUses[NUM_OVERLOADED_OPERATORS][3] = { | ||||||||||
15737 | { false, false, false } | ||||||||||
15738 | #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ | ||||||||||
15739 | , { Unary, Binary, MemberOnly } | ||||||||||
15740 | #include "clang/Basic/OperatorKinds.def" | ||||||||||
15741 | }; | ||||||||||
15742 | |||||||||||
15743 | bool CanBeUnaryOperator = OperatorUses[Op][0]; | ||||||||||
15744 | bool CanBeBinaryOperator = OperatorUses[Op][1]; | ||||||||||
15745 | bool MustBeMemberOperator = OperatorUses[Op][2]; | ||||||||||
15746 | |||||||||||
15747 | // C++ [over.oper]p8: | ||||||||||
15748 | // [...] Operator functions cannot have more or fewer parameters | ||||||||||
15749 | // than the number required for the corresponding operator, as | ||||||||||
15750 | // described in the rest of this subclause. | ||||||||||
15751 | unsigned NumParams = FnDecl->getNumParams() | ||||||||||
15752 | + (isa<CXXMethodDecl>(FnDecl)? 1 : 0); | ||||||||||
15753 | if (Op != OO_Call && | ||||||||||
15754 | ((NumParams == 1 && !CanBeUnaryOperator) || | ||||||||||
15755 | (NumParams == 2 && !CanBeBinaryOperator) || | ||||||||||
15756 | (NumParams < 1) || (NumParams > 2))) { | ||||||||||
15757 | // We have the wrong number of parameters. | ||||||||||
15758 | unsigned ErrorKind; | ||||||||||
15759 | if (CanBeUnaryOperator && CanBeBinaryOperator) { | ||||||||||
15760 | ErrorKind = 2; // 2 -> unary or binary. | ||||||||||
15761 | } else if (CanBeUnaryOperator) { | ||||||||||
15762 | ErrorKind = 0; // 0 -> unary | ||||||||||
15763 | } else { | ||||||||||
15764 | assert(CanBeBinaryOperator &&(static_cast <bool> (CanBeBinaryOperator && "All non-call overloaded operators are unary or binary!" ) ? void (0) : __assert_fail ("CanBeBinaryOperator && \"All non-call overloaded operators are unary or binary!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15765, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
15765 | "All non-call overloaded operators are unary or binary!")(static_cast <bool> (CanBeBinaryOperator && "All non-call overloaded operators are unary or binary!" ) ? void (0) : __assert_fail ("CanBeBinaryOperator && \"All non-call overloaded operators are unary or binary!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 15765, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
15766 | ErrorKind = 1; // 1 -> binary | ||||||||||
15767 | } | ||||||||||
15768 | |||||||||||
15769 | return Diag(FnDecl->getLocation(), diag::err_operator_overload_must_be) | ||||||||||
15770 | << FnDecl->getDeclName() << NumParams << ErrorKind; | ||||||||||
15771 | } | ||||||||||
15772 | |||||||||||
15773 | // Overloaded operators other than operator() cannot be variadic. | ||||||||||
15774 | if (Op != OO_Call && | ||||||||||
15775 | FnDecl->getType()->castAs<FunctionProtoType>()->isVariadic()) { | ||||||||||
15776 | return Diag(FnDecl->getLocation(), diag::err_operator_overload_variadic) | ||||||||||
15777 | << FnDecl->getDeclName(); | ||||||||||
15778 | } | ||||||||||
15779 | |||||||||||
15780 | // Some operators must be non-static member functions. | ||||||||||
15781 | if (MustBeMemberOperator && !isa<CXXMethodDecl>(FnDecl)) { | ||||||||||
15782 | return Diag(FnDecl->getLocation(), | ||||||||||
15783 | diag::err_operator_overload_must_be_member) | ||||||||||
15784 | << FnDecl->getDeclName(); | ||||||||||
15785 | } | ||||||||||
15786 | |||||||||||
15787 | // C++ [over.inc]p1: | ||||||||||
15788 | // The user-defined function called operator++ implements the | ||||||||||
15789 | // prefix and postfix ++ operator. If this function is a member | ||||||||||
15790 | // function with no parameters, or a non-member function with one | ||||||||||
15791 | // parameter of class or enumeration type, it defines the prefix | ||||||||||
15792 | // increment operator ++ for objects of that type. If the function | ||||||||||
15793 | // is a member function with one parameter (which shall be of type | ||||||||||
15794 | // int) or a non-member function with two parameters (the second | ||||||||||
15795 | // of which shall be of type int), it defines the postfix | ||||||||||
15796 | // increment operator ++ for objects of that type. | ||||||||||
15797 | if ((Op == OO_PlusPlus || Op == OO_MinusMinus) && NumParams == 2) { | ||||||||||
15798 | ParmVarDecl *LastParam = FnDecl->getParamDecl(FnDecl->getNumParams() - 1); | ||||||||||
15799 | QualType ParamType = LastParam->getType(); | ||||||||||
15800 | |||||||||||
15801 | if (!ParamType->isSpecificBuiltinType(BuiltinType::Int) && | ||||||||||
15802 | !ParamType->isDependentType()) | ||||||||||
15803 | return Diag(LastParam->getLocation(), | ||||||||||
15804 | diag::err_operator_overload_post_incdec_must_be_int) | ||||||||||
15805 | << LastParam->getType() << (Op == OO_MinusMinus); | ||||||||||
15806 | } | ||||||||||
15807 | |||||||||||
15808 | return false; | ||||||||||
15809 | } | ||||||||||
15810 | |||||||||||
15811 | static bool | ||||||||||
15812 | checkLiteralOperatorTemplateParameterList(Sema &SemaRef, | ||||||||||
15813 | FunctionTemplateDecl *TpDecl) { | ||||||||||
15814 | TemplateParameterList *TemplateParams = TpDecl->getTemplateParameters(); | ||||||||||
15815 | |||||||||||
15816 | // Must have one or two template parameters. | ||||||||||
15817 | if (TemplateParams->size() == 1) { | ||||||||||
15818 | NonTypeTemplateParmDecl *PmDecl = | ||||||||||
15819 | dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(0)); | ||||||||||
15820 | |||||||||||
15821 | // The template parameter must be a char parameter pack. | ||||||||||
15822 | if (PmDecl && PmDecl->isTemplateParameterPack() && | ||||||||||
15823 | SemaRef.Context.hasSameType(PmDecl->getType(), SemaRef.Context.CharTy)) | ||||||||||
15824 | return false; | ||||||||||
15825 | |||||||||||
15826 | // C++20 [over.literal]p5: | ||||||||||
15827 | // A string literal operator template is a literal operator template | ||||||||||
15828 | // whose template-parameter-list comprises a single non-type | ||||||||||
15829 | // template-parameter of class type. | ||||||||||
15830 | // | ||||||||||
15831 | // As a DR resolution, we also allow placeholders for deduced class | ||||||||||
15832 | // template specializations. | ||||||||||
15833 | if (SemaRef.getLangOpts().CPlusPlus20 && | ||||||||||
15834 | !PmDecl->isTemplateParameterPack() && | ||||||||||
15835 | (PmDecl->getType()->isRecordType() || | ||||||||||
15836 | PmDecl->getType()->getAs<DeducedTemplateSpecializationType>())) | ||||||||||
15837 | return false; | ||||||||||
15838 | } else if (TemplateParams->size() == 2) { | ||||||||||
15839 | TemplateTypeParmDecl *PmType = | ||||||||||
15840 | dyn_cast<TemplateTypeParmDecl>(TemplateParams->getParam(0)); | ||||||||||
15841 | NonTypeTemplateParmDecl *PmArgs = | ||||||||||
15842 | dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(1)); | ||||||||||
15843 | |||||||||||
15844 | // The second template parameter must be a parameter pack with the | ||||||||||
15845 | // first template parameter as its type. | ||||||||||
15846 | if (PmType && PmArgs && !PmType->isTemplateParameterPack() && | ||||||||||
15847 | PmArgs->isTemplateParameterPack()) { | ||||||||||
15848 | const TemplateTypeParmType *TArgs = | ||||||||||
15849 | PmArgs->getType()->getAs<TemplateTypeParmType>(); | ||||||||||
15850 | if (TArgs && TArgs->getDepth() == PmType->getDepth() && | ||||||||||
15851 | TArgs->getIndex() == PmType->getIndex()) { | ||||||||||
15852 | if (!SemaRef.inTemplateInstantiation()) | ||||||||||
15853 | SemaRef.Diag(TpDecl->getLocation(), | ||||||||||
15854 | diag::ext_string_literal_operator_template); | ||||||||||
15855 | return false; | ||||||||||
15856 | } | ||||||||||
15857 | } | ||||||||||
15858 | } | ||||||||||
15859 | |||||||||||
15860 | SemaRef.Diag(TpDecl->getTemplateParameters()->getSourceRange().getBegin(), | ||||||||||
15861 | diag::err_literal_operator_template) | ||||||||||
15862 | << TpDecl->getTemplateParameters()->getSourceRange(); | ||||||||||
15863 | return true; | ||||||||||
15864 | } | ||||||||||
15865 | |||||||||||
15866 | /// CheckLiteralOperatorDeclaration - Check whether the declaration | ||||||||||
15867 | /// of this literal operator function is well-formed. If so, returns | ||||||||||
15868 | /// false; otherwise, emits appropriate diagnostics and returns true. | ||||||||||
15869 | bool Sema::CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl) { | ||||||||||
15870 | if (isa<CXXMethodDecl>(FnDecl)) { | ||||||||||
15871 | Diag(FnDecl->getLocation(), diag::err_literal_operator_outside_namespace) | ||||||||||
15872 | << FnDecl->getDeclName(); | ||||||||||
15873 | return true; | ||||||||||
15874 | } | ||||||||||
15875 | |||||||||||
15876 | if (FnDecl->isExternC()) { | ||||||||||
15877 | Diag(FnDecl->getLocation(), diag::err_literal_operator_extern_c); | ||||||||||
15878 | if (const LinkageSpecDecl *LSD = | ||||||||||
15879 | FnDecl->getDeclContext()->getExternCContext()) | ||||||||||
15880 | Diag(LSD->getExternLoc(), diag::note_extern_c_begins_here); | ||||||||||
15881 | return true; | ||||||||||
15882 | } | ||||||||||
15883 | |||||||||||
15884 | // This might be the definition of a literal operator template. | ||||||||||
15885 | FunctionTemplateDecl *TpDecl = FnDecl->getDescribedFunctionTemplate(); | ||||||||||
15886 | |||||||||||
15887 | // This might be a specialization of a literal operator template. | ||||||||||
15888 | if (!TpDecl) | ||||||||||
15889 | TpDecl = FnDecl->getPrimaryTemplate(); | ||||||||||
15890 | |||||||||||
15891 | // template <char...> type operator "" name() and | ||||||||||
15892 | // template <class T, T...> type operator "" name() are the only valid | ||||||||||
15893 | // template signatures, and the only valid signatures with no parameters. | ||||||||||
15894 | // | ||||||||||
15895 | // C++20 also allows template <SomeClass T> type operator "" name(). | ||||||||||
15896 | if (TpDecl) { | ||||||||||
15897 | if (FnDecl->param_size() != 0) { | ||||||||||
15898 | Diag(FnDecl->getLocation(), | ||||||||||
15899 | diag::err_literal_operator_template_with_params); | ||||||||||
15900 | return true; | ||||||||||
15901 | } | ||||||||||
15902 | |||||||||||
15903 | if (checkLiteralOperatorTemplateParameterList(*this, TpDecl)) | ||||||||||
15904 | return true; | ||||||||||
15905 | |||||||||||
15906 | } else if (FnDecl->param_size() == 1) { | ||||||||||
15907 | const ParmVarDecl *Param = FnDecl->getParamDecl(0); | ||||||||||
15908 | |||||||||||
15909 | QualType ParamType = Param->getType().getUnqualifiedType(); | ||||||||||
15910 | |||||||||||
15911 | // Only unsigned long long int, long double, any character type, and const | ||||||||||
15912 | // char * are allowed as the only parameters. | ||||||||||
15913 | if (ParamType->isSpecificBuiltinType(BuiltinType::ULongLong) || | ||||||||||
15914 | ParamType->isSpecificBuiltinType(BuiltinType::LongDouble) || | ||||||||||
15915 | Context.hasSameType(ParamType, Context.CharTy) || | ||||||||||
15916 | Context.hasSameType(ParamType, Context.WideCharTy) || | ||||||||||
15917 | Context.hasSameType(ParamType, Context.Char8Ty) || | ||||||||||
15918 | Context.hasSameType(ParamType, Context.Char16Ty) || | ||||||||||
15919 | Context.hasSameType(ParamType, Context.Char32Ty)) { | ||||||||||
15920 | } else if (const PointerType *Ptr = ParamType->getAs<PointerType>()) { | ||||||||||
15921 | QualType InnerType = Ptr->getPointeeType(); | ||||||||||
15922 | |||||||||||
15923 | // Pointer parameter must be a const char *. | ||||||||||
15924 | if (!(Context.hasSameType(InnerType.getUnqualifiedType(), | ||||||||||
15925 | Context.CharTy) && | ||||||||||
15926 | InnerType.isConstQualified() && !InnerType.isVolatileQualified())) { | ||||||||||
15927 | Diag(Param->getSourceRange().getBegin(), | ||||||||||
15928 | diag::err_literal_operator_param) | ||||||||||
15929 | << ParamType << "'const char *'" << Param->getSourceRange(); | ||||||||||
15930 | return true; | ||||||||||
15931 | } | ||||||||||
15932 | |||||||||||
15933 | } else if (ParamType->isRealFloatingType()) { | ||||||||||
15934 | Diag(Param->getSourceRange().getBegin(), diag::err_literal_operator_param) | ||||||||||
15935 | << ParamType << Context.LongDoubleTy << Param->getSourceRange(); | ||||||||||
15936 | return true; | ||||||||||
15937 | |||||||||||
15938 | } else if (ParamType->isIntegerType()) { | ||||||||||
15939 | Diag(Param->getSourceRange().getBegin(), diag::err_literal_operator_param) | ||||||||||
15940 | << ParamType << Context.UnsignedLongLongTy << Param->getSourceRange(); | ||||||||||
15941 | return true; | ||||||||||
15942 | |||||||||||
15943 | } else { | ||||||||||
15944 | Diag(Param->getSourceRange().getBegin(), | ||||||||||
15945 | diag::err_literal_operator_invalid_param) | ||||||||||
15946 | << ParamType << Param->getSourceRange(); | ||||||||||
15947 | return true; | ||||||||||
15948 | } | ||||||||||
15949 | |||||||||||
15950 | } else if (FnDecl->param_size() == 2) { | ||||||||||
15951 | FunctionDecl::param_iterator Param = FnDecl->param_begin(); | ||||||||||
15952 | |||||||||||
15953 | // First, verify that the first parameter is correct. | ||||||||||
15954 | |||||||||||
15955 | QualType FirstParamType = (*Param)->getType().getUnqualifiedType(); | ||||||||||
15956 | |||||||||||
15957 | // Two parameter function must have a pointer to const as a | ||||||||||
15958 | // first parameter; let's strip those qualifiers. | ||||||||||
15959 | const PointerType *PT = FirstParamType->getAs<PointerType>(); | ||||||||||
15960 | |||||||||||
15961 | if (!PT) { | ||||||||||
15962 | Diag((*Param)->getSourceRange().getBegin(), | ||||||||||
15963 | diag::err_literal_operator_param) | ||||||||||
15964 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||||||||
15965 | return true; | ||||||||||
15966 | } | ||||||||||
15967 | |||||||||||
15968 | QualType PointeeType = PT->getPointeeType(); | ||||||||||
15969 | // First parameter must be const | ||||||||||
15970 | if (!PointeeType.isConstQualified() || PointeeType.isVolatileQualified()) { | ||||||||||
15971 | Diag((*Param)->getSourceRange().getBegin(), | ||||||||||
15972 | diag::err_literal_operator_param) | ||||||||||
15973 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||||||||
15974 | return true; | ||||||||||
15975 | } | ||||||||||
15976 | |||||||||||
15977 | QualType InnerType = PointeeType.getUnqualifiedType(); | ||||||||||
15978 | // Only const char *, const wchar_t*, const char8_t*, const char16_t*, and | ||||||||||
15979 | // const char32_t* are allowed as the first parameter to a two-parameter | ||||||||||
15980 | // function | ||||||||||
15981 | if (!(Context.hasSameType(InnerType, Context.CharTy) || | ||||||||||
15982 | Context.hasSameType(InnerType, Context.WideCharTy) || | ||||||||||
15983 | Context.hasSameType(InnerType, Context.Char8Ty) || | ||||||||||
15984 | Context.hasSameType(InnerType, Context.Char16Ty) || | ||||||||||
15985 | Context.hasSameType(InnerType, Context.Char32Ty))) { | ||||||||||
15986 | Diag((*Param)->getSourceRange().getBegin(), | ||||||||||
15987 | diag::err_literal_operator_param) | ||||||||||
15988 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||||||||
15989 | return true; | ||||||||||
15990 | } | ||||||||||
15991 | |||||||||||
15992 | // Move on to the second and final parameter. | ||||||||||
15993 | ++Param; | ||||||||||
15994 | |||||||||||
15995 | // The second parameter must be a std::size_t. | ||||||||||
15996 | QualType SecondParamType = (*Param)->getType().getUnqualifiedType(); | ||||||||||
15997 | if (!Context.hasSameType(SecondParamType, Context.getSizeType())) { | ||||||||||
15998 | Diag((*Param)->getSourceRange().getBegin(), | ||||||||||
15999 | diag::err_literal_operator_param) | ||||||||||
16000 | << SecondParamType << Context.getSizeType() | ||||||||||
16001 | << (*Param)->getSourceRange(); | ||||||||||
16002 | return true; | ||||||||||
16003 | } | ||||||||||
16004 | } else { | ||||||||||
16005 | Diag(FnDecl->getLocation(), diag::err_literal_operator_bad_param_count); | ||||||||||
16006 | return true; | ||||||||||
16007 | } | ||||||||||
16008 | |||||||||||
16009 | // Parameters are good. | ||||||||||
16010 | |||||||||||
16011 | // A parameter-declaration-clause containing a default argument is not | ||||||||||
16012 | // equivalent to any of the permitted forms. | ||||||||||
16013 | for (auto Param : FnDecl->parameters()) { | ||||||||||
16014 | if (Param->hasDefaultArg()) { | ||||||||||
16015 | Diag(Param->getDefaultArgRange().getBegin(), | ||||||||||
16016 | diag::err_literal_operator_default_argument) | ||||||||||
16017 | << Param->getDefaultArgRange(); | ||||||||||
16018 | break; | ||||||||||
16019 | } | ||||||||||
16020 | } | ||||||||||
16021 | |||||||||||
16022 | StringRef LiteralName | ||||||||||
16023 | = FnDecl->getDeclName().getCXXLiteralIdentifier()->getName(); | ||||||||||
16024 | if (LiteralName[0] != '_' && | ||||||||||
16025 | !getSourceManager().isInSystemHeader(FnDecl->getLocation())) { | ||||||||||
16026 | // C++11 [usrlit.suffix]p1: | ||||||||||
16027 | // Literal suffix identifiers that do not start with an underscore | ||||||||||
16028 | // are reserved for future standardization. | ||||||||||
16029 | Diag(FnDecl->getLocation(), diag::warn_user_literal_reserved) | ||||||||||
16030 | << StringLiteralParser::isValidUDSuffix(getLangOpts(), LiteralName); | ||||||||||
16031 | } | ||||||||||
16032 | |||||||||||
16033 | return false; | ||||||||||
16034 | } | ||||||||||
16035 | |||||||||||
16036 | /// ActOnStartLinkageSpecification - Parsed the beginning of a C++ | ||||||||||
16037 | /// linkage specification, including the language and (if present) | ||||||||||
16038 | /// the '{'. ExternLoc is the location of the 'extern', Lang is the | ||||||||||
16039 | /// language string literal. LBraceLoc, if valid, provides the location of | ||||||||||
16040 | /// the '{' brace. Otherwise, this linkage specification does not | ||||||||||
16041 | /// have any braces. | ||||||||||
16042 | Decl *Sema::ActOnStartLinkageSpecification(Scope *S, SourceLocation ExternLoc, | ||||||||||
16043 | Expr *LangStr, | ||||||||||
16044 | SourceLocation LBraceLoc) { | ||||||||||
16045 | StringLiteral *Lit = cast<StringLiteral>(LangStr); | ||||||||||
16046 | if (!Lit->isAscii()) { | ||||||||||
16047 | Diag(LangStr->getExprLoc(), diag::err_language_linkage_spec_not_ascii) | ||||||||||
16048 | << LangStr->getSourceRange(); | ||||||||||
16049 | return nullptr; | ||||||||||
16050 | } | ||||||||||
16051 | |||||||||||
16052 | StringRef Lang = Lit->getString(); | ||||||||||
16053 | LinkageSpecDecl::LanguageIDs Language; | ||||||||||
16054 | if (Lang == "C") | ||||||||||
16055 | Language = LinkageSpecDecl::lang_c; | ||||||||||
16056 | else if (Lang == "C++") | ||||||||||
16057 | Language = LinkageSpecDecl::lang_cxx; | ||||||||||
16058 | else { | ||||||||||
16059 | Diag(LangStr->getExprLoc(), diag::err_language_linkage_spec_unknown) | ||||||||||
16060 | << LangStr->getSourceRange(); | ||||||||||
16061 | return nullptr; | ||||||||||
16062 | } | ||||||||||
16063 | |||||||||||
16064 | // FIXME: Add all the various semantics of linkage specifications | ||||||||||
16065 | |||||||||||
16066 | LinkageSpecDecl *D = LinkageSpecDecl::Create(Context, CurContext, ExternLoc, | ||||||||||
16067 | LangStr->getExprLoc(), Language, | ||||||||||
16068 | LBraceLoc.isValid()); | ||||||||||
16069 | CurContext->addDecl(D); | ||||||||||
16070 | PushDeclContext(S, D); | ||||||||||
16071 | return D; | ||||||||||
16072 | } | ||||||||||
16073 | |||||||||||
16074 | /// ActOnFinishLinkageSpecification - Complete the definition of | ||||||||||
16075 | /// the C++ linkage specification LinkageSpec. If RBraceLoc is | ||||||||||
16076 | /// valid, it's the position of the closing '}' brace in a linkage | ||||||||||
16077 | /// specification that uses braces. | ||||||||||
16078 | Decl *Sema::ActOnFinishLinkageSpecification(Scope *S, | ||||||||||
16079 | Decl *LinkageSpec, | ||||||||||
16080 | SourceLocation RBraceLoc) { | ||||||||||
16081 | if (RBraceLoc.isValid()) { | ||||||||||
16082 | LinkageSpecDecl* LSDecl = cast<LinkageSpecDecl>(LinkageSpec); | ||||||||||
16083 | LSDecl->setRBraceLoc(RBraceLoc); | ||||||||||
16084 | } | ||||||||||
16085 | PopDeclContext(); | ||||||||||
16086 | return LinkageSpec; | ||||||||||
16087 | } | ||||||||||
16088 | |||||||||||
16089 | Decl *Sema::ActOnEmptyDeclaration(Scope *S, | ||||||||||
16090 | const ParsedAttributesView &AttrList, | ||||||||||
16091 | SourceLocation SemiLoc) { | ||||||||||
16092 | Decl *ED = EmptyDecl::Create(Context, CurContext, SemiLoc); | ||||||||||
16093 | // Attribute declarations appertain to empty declaration so we handle | ||||||||||
16094 | // them here. | ||||||||||
16095 | ProcessDeclAttributeList(S, ED, AttrList); | ||||||||||
16096 | |||||||||||
16097 | CurContext->addDecl(ED); | ||||||||||
16098 | return ED; | ||||||||||
16099 | } | ||||||||||
16100 | |||||||||||
16101 | /// Perform semantic analysis for the variable declaration that | ||||||||||
16102 | /// occurs within a C++ catch clause, returning the newly-created | ||||||||||
16103 | /// variable. | ||||||||||
16104 | VarDecl *Sema::BuildExceptionDeclaration(Scope *S, | ||||||||||
16105 | TypeSourceInfo *TInfo, | ||||||||||
16106 | SourceLocation StartLoc, | ||||||||||
16107 | SourceLocation Loc, | ||||||||||
16108 | IdentifierInfo *Name) { | ||||||||||
16109 | bool Invalid = false; | ||||||||||
16110 | QualType ExDeclType = TInfo->getType(); | ||||||||||
16111 | |||||||||||
16112 | // Arrays and functions decay. | ||||||||||
16113 | if (ExDeclType->isArrayType()) | ||||||||||
16114 | ExDeclType = Context.getArrayDecayedType(ExDeclType); | ||||||||||
16115 | else if (ExDeclType->isFunctionType()) | ||||||||||
16116 | ExDeclType = Context.getPointerType(ExDeclType); | ||||||||||
16117 | |||||||||||
16118 | // C++ 15.3p1: The exception-declaration shall not denote an incomplete type. | ||||||||||
16119 | // The exception-declaration shall not denote a pointer or reference to an | ||||||||||
16120 | // incomplete type, other than [cv] void*. | ||||||||||
16121 | // N2844 forbids rvalue references. | ||||||||||
16122 | if (!ExDeclType->isDependentType() && ExDeclType->isRValueReferenceType()) { | ||||||||||
16123 | Diag(Loc, diag::err_catch_rvalue_ref); | ||||||||||
16124 | Invalid = true; | ||||||||||
16125 | } | ||||||||||
16126 | |||||||||||
16127 | if (ExDeclType->isVariablyModifiedType()) { | ||||||||||
16128 | Diag(Loc, diag::err_catch_variably_modified) << ExDeclType; | ||||||||||
16129 | Invalid = true; | ||||||||||
16130 | } | ||||||||||
16131 | |||||||||||
16132 | QualType BaseType = ExDeclType; | ||||||||||
16133 | int Mode = 0; // 0 for direct type, 1 for pointer, 2 for reference | ||||||||||
16134 | unsigned DK = diag::err_catch_incomplete; | ||||||||||
16135 | if (const PointerType *Ptr = BaseType->getAs<PointerType>()) { | ||||||||||
16136 | BaseType = Ptr->getPointeeType(); | ||||||||||
16137 | Mode = 1; | ||||||||||
16138 | DK = diag::err_catch_incomplete_ptr; | ||||||||||
16139 | } else if (const ReferenceType *Ref = BaseType->getAs<ReferenceType>()) { | ||||||||||
16140 | // For the purpose of error recovery, we treat rvalue refs like lvalue refs. | ||||||||||
16141 | BaseType = Ref->getPointeeType(); | ||||||||||
16142 | Mode = 2; | ||||||||||
16143 | DK = diag::err_catch_incomplete_ref; | ||||||||||
16144 | } | ||||||||||
16145 | if (!Invalid && (Mode == 0 || !BaseType->isVoidType()) && | ||||||||||
16146 | !BaseType->isDependentType() && RequireCompleteType(Loc, BaseType, DK)) | ||||||||||
16147 | Invalid = true; | ||||||||||
16148 | |||||||||||
16149 | if (!Invalid && Mode != 1 && BaseType->isSizelessType()) { | ||||||||||
16150 | Diag(Loc, diag::err_catch_sizeless) << (Mode == 2 ? 1 : 0) << BaseType; | ||||||||||
16151 | Invalid = true; | ||||||||||
16152 | } | ||||||||||
16153 | |||||||||||
16154 | if (!Invalid && !ExDeclType->isDependentType() && | ||||||||||
16155 | RequireNonAbstractType(Loc, ExDeclType, | ||||||||||
16156 | diag::err_abstract_type_in_decl, | ||||||||||
16157 | AbstractVariableType)) | ||||||||||
16158 | Invalid = true; | ||||||||||
16159 | |||||||||||
16160 | // Only the non-fragile NeXT runtime currently supports C++ catches | ||||||||||
16161 | // of ObjC types, and no runtime supports catching ObjC types by value. | ||||||||||
16162 | if (!Invalid && getLangOpts().ObjC) { | ||||||||||
16163 | QualType T = ExDeclType; | ||||||||||
16164 | if (const ReferenceType *RT = T->getAs<ReferenceType>()) | ||||||||||
16165 | T = RT->getPointeeType(); | ||||||||||
16166 | |||||||||||
16167 | if (T->isObjCObjectType()) { | ||||||||||
16168 | Diag(Loc, diag::err_objc_object_catch); | ||||||||||
16169 | Invalid = true; | ||||||||||
16170 | } else if (T->isObjCObjectPointerType()) { | ||||||||||
16171 | // FIXME: should this be a test for macosx-fragile specifically? | ||||||||||
16172 | if (getLangOpts().ObjCRuntime.isFragile()) | ||||||||||
16173 | Diag(Loc, diag::warn_objc_pointer_cxx_catch_fragile); | ||||||||||
16174 | } | ||||||||||
16175 | } | ||||||||||
16176 | |||||||||||
16177 | VarDecl *ExDecl = VarDecl::Create(Context, CurContext, StartLoc, Loc, Name, | ||||||||||
16178 | ExDeclType, TInfo, SC_None); | ||||||||||
16179 | ExDecl->setExceptionVariable(true); | ||||||||||
16180 | |||||||||||
16181 | // In ARC, infer 'retaining' for variables of retainable type. | ||||||||||
16182 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(ExDecl)) | ||||||||||
16183 | Invalid = true; | ||||||||||
16184 | |||||||||||
16185 | if (!Invalid && !ExDeclType->isDependentType()) { | ||||||||||
16186 | if (const RecordType *recordType = ExDeclType->getAs<RecordType>()) { | ||||||||||
16187 | // Insulate this from anything else we might currently be parsing. | ||||||||||
16188 | EnterExpressionEvaluationContext scope( | ||||||||||
16189 | *this, ExpressionEvaluationContext::PotentiallyEvaluated); | ||||||||||
16190 | |||||||||||
16191 | // C++ [except.handle]p16: | ||||||||||
16192 | // The object declared in an exception-declaration or, if the | ||||||||||
16193 | // exception-declaration does not specify a name, a temporary (12.2) is | ||||||||||
16194 | // copy-initialized (8.5) from the exception object. [...] | ||||||||||
16195 | // The object is destroyed when the handler exits, after the destruction | ||||||||||
16196 | // of any automatic objects initialized within the handler. | ||||||||||
16197 | // | ||||||||||
16198 | // We just pretend to initialize the object with itself, then make sure | ||||||||||
16199 | // it can be destroyed later. | ||||||||||
16200 | QualType initType = Context.getExceptionObjectType(ExDeclType); | ||||||||||
16201 | |||||||||||
16202 | InitializedEntity entity = | ||||||||||
16203 | InitializedEntity::InitializeVariable(ExDecl); | ||||||||||
16204 | InitializationKind initKind = | ||||||||||
16205 | InitializationKind::CreateCopy(Loc, SourceLocation()); | ||||||||||
16206 | |||||||||||
16207 | Expr *opaqueValue = | ||||||||||
16208 | new (Context) OpaqueValueExpr(Loc, initType, VK_LValue, OK_Ordinary); | ||||||||||
16209 | InitializationSequence sequence(*this, entity, initKind, opaqueValue); | ||||||||||
16210 | ExprResult result = sequence.Perform(*this, entity, initKind, opaqueValue); | ||||||||||
16211 | if (result.isInvalid()) | ||||||||||
16212 | Invalid = true; | ||||||||||
16213 | else { | ||||||||||
16214 | // If the constructor used was non-trivial, set this as the | ||||||||||
16215 | // "initializer". | ||||||||||
16216 | CXXConstructExpr *construct = result.getAs<CXXConstructExpr>(); | ||||||||||
16217 | if (!construct->getConstructor()->isTrivial()) { | ||||||||||
16218 | Expr *init = MaybeCreateExprWithCleanups(construct); | ||||||||||
16219 | ExDecl->setInit(init); | ||||||||||
16220 | } | ||||||||||
16221 | |||||||||||
16222 | // And make sure it's destructable. | ||||||||||
16223 | FinalizeVarWithDestructor(ExDecl, recordType); | ||||||||||
16224 | } | ||||||||||
16225 | } | ||||||||||
16226 | } | ||||||||||
16227 | |||||||||||
16228 | if (Invalid) | ||||||||||
16229 | ExDecl->setInvalidDecl(); | ||||||||||
16230 | |||||||||||
16231 | return ExDecl; | ||||||||||
16232 | } | ||||||||||
16233 | |||||||||||
16234 | /// ActOnExceptionDeclarator - Parsed the exception-declarator in a C++ catch | ||||||||||
16235 | /// handler. | ||||||||||
16236 | Decl *Sema::ActOnExceptionDeclarator(Scope *S, Declarator &D) { | ||||||||||
16237 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||||||
16238 | bool Invalid = D.isInvalidType(); | ||||||||||
16239 | |||||||||||
16240 | // Check for unexpanded parameter packs. | ||||||||||
16241 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||||||
16242 | UPPC_ExceptionType)) { | ||||||||||
16243 | TInfo = Context.getTrivialTypeSourceInfo(Context.IntTy, | ||||||||||
16244 | D.getIdentifierLoc()); | ||||||||||
16245 | Invalid = true; | ||||||||||
16246 | } | ||||||||||
16247 | |||||||||||
16248 | IdentifierInfo *II = D.getIdentifier(); | ||||||||||
16249 | if (NamedDecl *PrevDecl = LookupSingleName(S, II, D.getIdentifierLoc(), | ||||||||||
16250 | LookupOrdinaryName, | ||||||||||
16251 | ForVisibleRedeclaration)) { | ||||||||||
16252 | // The scope should be freshly made just for us. There is just no way | ||||||||||
16253 | // it contains any previous declaration, except for function parameters in | ||||||||||
16254 | // a function-try-block's catch statement. | ||||||||||
16255 | assert(!S->isDeclScope(PrevDecl))(static_cast <bool> (!S->isDeclScope(PrevDecl)) ? void (0) : __assert_fail ("!S->isDeclScope(PrevDecl)", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16255, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16256 | if (isDeclInScope(PrevDecl, CurContext, S)) { | ||||||||||
16257 | Diag(D.getIdentifierLoc(), diag::err_redefinition) | ||||||||||
16258 | << D.getIdentifier(); | ||||||||||
16259 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||||||||
16260 | Invalid = true; | ||||||||||
16261 | } else if (PrevDecl->isTemplateParameter()) | ||||||||||
16262 | // Maybe we will complain about the shadowed template parameter. | ||||||||||
16263 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||||||
16264 | } | ||||||||||
16265 | |||||||||||
16266 | if (D.getCXXScopeSpec().isSet() && !Invalid) { | ||||||||||
16267 | Diag(D.getIdentifierLoc(), diag::err_qualified_catch_declarator) | ||||||||||
16268 | << D.getCXXScopeSpec().getRange(); | ||||||||||
16269 | Invalid = true; | ||||||||||
16270 | } | ||||||||||
16271 | |||||||||||
16272 | VarDecl *ExDecl = BuildExceptionDeclaration( | ||||||||||
16273 | S, TInfo, D.getBeginLoc(), D.getIdentifierLoc(), D.getIdentifier()); | ||||||||||
16274 | if (Invalid) | ||||||||||
16275 | ExDecl->setInvalidDecl(); | ||||||||||
16276 | |||||||||||
16277 | // Add the exception declaration into this scope. | ||||||||||
16278 | if (II) | ||||||||||
16279 | PushOnScopeChains(ExDecl, S); | ||||||||||
16280 | else | ||||||||||
16281 | CurContext->addDecl(ExDecl); | ||||||||||
16282 | |||||||||||
16283 | ProcessDeclAttributes(S, ExDecl, D); | ||||||||||
16284 | return ExDecl; | ||||||||||
16285 | } | ||||||||||
16286 | |||||||||||
16287 | Decl *Sema::ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, | ||||||||||
16288 | Expr *AssertExpr, | ||||||||||
16289 | Expr *AssertMessageExpr, | ||||||||||
16290 | SourceLocation RParenLoc) { | ||||||||||
16291 | StringLiteral *AssertMessage = | ||||||||||
16292 | AssertMessageExpr ? cast<StringLiteral>(AssertMessageExpr) : nullptr; | ||||||||||
16293 | |||||||||||
16294 | if (DiagnoseUnexpandedParameterPack(AssertExpr, UPPC_StaticAssertExpression)) | ||||||||||
16295 | return nullptr; | ||||||||||
16296 | |||||||||||
16297 | return BuildStaticAssertDeclaration(StaticAssertLoc, AssertExpr, | ||||||||||
16298 | AssertMessage, RParenLoc, false); | ||||||||||
16299 | } | ||||||||||
16300 | |||||||||||
16301 | Decl *Sema::BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc, | ||||||||||
16302 | Expr *AssertExpr, | ||||||||||
16303 | StringLiteral *AssertMessage, | ||||||||||
16304 | SourceLocation RParenLoc, | ||||||||||
16305 | bool Failed) { | ||||||||||
16306 | assert(AssertExpr != nullptr && "Expected non-null condition")(static_cast <bool> (AssertExpr != nullptr && "Expected non-null condition" ) ? void (0) : __assert_fail ("AssertExpr != nullptr && \"Expected non-null condition\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16306, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16307 | if (!AssertExpr->isTypeDependent() && !AssertExpr->isValueDependent() && | ||||||||||
16308 | !Failed) { | ||||||||||
16309 | // In a static_assert-declaration, the constant-expression shall be a | ||||||||||
16310 | // constant expression that can be contextually converted to bool. | ||||||||||
16311 | ExprResult Converted = PerformContextuallyConvertToBool(AssertExpr); | ||||||||||
16312 | if (Converted.isInvalid()) | ||||||||||
16313 | Failed = true; | ||||||||||
16314 | |||||||||||
16315 | ExprResult FullAssertExpr = | ||||||||||
16316 | ActOnFinishFullExpr(Converted.get(), StaticAssertLoc, | ||||||||||
16317 | /*DiscardedValue*/ false, | ||||||||||
16318 | /*IsConstexpr*/ true); | ||||||||||
16319 | if (FullAssertExpr.isInvalid()) | ||||||||||
16320 | Failed = true; | ||||||||||
16321 | else | ||||||||||
16322 | AssertExpr = FullAssertExpr.get(); | ||||||||||
16323 | |||||||||||
16324 | llvm::APSInt Cond; | ||||||||||
16325 | if (!Failed && VerifyIntegerConstantExpression( | ||||||||||
16326 | AssertExpr, &Cond, | ||||||||||
16327 | diag::err_static_assert_expression_is_not_constant) | ||||||||||
16328 | .isInvalid()) | ||||||||||
16329 | Failed = true; | ||||||||||
16330 | |||||||||||
16331 | if (!Failed && !Cond) { | ||||||||||
16332 | SmallString<256> MsgBuffer; | ||||||||||
16333 | llvm::raw_svector_ostream Msg(MsgBuffer); | ||||||||||
16334 | if (AssertMessage) | ||||||||||
16335 | AssertMessage->printPretty(Msg, nullptr, getPrintingPolicy()); | ||||||||||
16336 | |||||||||||
16337 | Expr *InnerCond = nullptr; | ||||||||||
16338 | std::string InnerCondDescription; | ||||||||||
16339 | std::tie(InnerCond, InnerCondDescription) = | ||||||||||
16340 | findFailedBooleanCondition(Converted.get()); | ||||||||||
16341 | if (InnerCond && isa<ConceptSpecializationExpr>(InnerCond)) { | ||||||||||
16342 | // Drill down into concept specialization expressions to see why they | ||||||||||
16343 | // weren't satisfied. | ||||||||||
16344 | Diag(StaticAssertLoc, diag::err_static_assert_failed) | ||||||||||
16345 | << !AssertMessage << Msg.str() << AssertExpr->getSourceRange(); | ||||||||||
16346 | ConstraintSatisfaction Satisfaction; | ||||||||||
16347 | if (!CheckConstraintSatisfaction(InnerCond, Satisfaction)) | ||||||||||
16348 | DiagnoseUnsatisfiedConstraint(Satisfaction); | ||||||||||
16349 | } else if (InnerCond && !isa<CXXBoolLiteralExpr>(InnerCond) | ||||||||||
16350 | && !isa<IntegerLiteral>(InnerCond)) { | ||||||||||
16351 | Diag(StaticAssertLoc, diag::err_static_assert_requirement_failed) | ||||||||||
16352 | << InnerCondDescription << !AssertMessage | ||||||||||
16353 | << Msg.str() << InnerCond->getSourceRange(); | ||||||||||
16354 | } else { | ||||||||||
16355 | Diag(StaticAssertLoc, diag::err_static_assert_failed) | ||||||||||
16356 | << !AssertMessage << Msg.str() << AssertExpr->getSourceRange(); | ||||||||||
16357 | } | ||||||||||
16358 | Failed = true; | ||||||||||
16359 | } | ||||||||||
16360 | } else { | ||||||||||
16361 | ExprResult FullAssertExpr = ActOnFinishFullExpr(AssertExpr, StaticAssertLoc, | ||||||||||
16362 | /*DiscardedValue*/false, | ||||||||||
16363 | /*IsConstexpr*/true); | ||||||||||
16364 | if (FullAssertExpr.isInvalid()) | ||||||||||
16365 | Failed = true; | ||||||||||
16366 | else | ||||||||||
16367 | AssertExpr = FullAssertExpr.get(); | ||||||||||
16368 | } | ||||||||||
16369 | |||||||||||
16370 | Decl *Decl = StaticAssertDecl::Create(Context, CurContext, StaticAssertLoc, | ||||||||||
16371 | AssertExpr, AssertMessage, RParenLoc, | ||||||||||
16372 | Failed); | ||||||||||
16373 | |||||||||||
16374 | CurContext->addDecl(Decl); | ||||||||||
16375 | return Decl; | ||||||||||
16376 | } | ||||||||||
16377 | |||||||||||
16378 | /// Perform semantic analysis of the given friend type declaration. | ||||||||||
16379 | /// | ||||||||||
16380 | /// \returns A friend declaration that. | ||||||||||
16381 | FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation LocStart, | ||||||||||
16382 | SourceLocation FriendLoc, | ||||||||||
16383 | TypeSourceInfo *TSInfo) { | ||||||||||
16384 | assert(TSInfo && "NULL TypeSourceInfo for friend type declaration")(static_cast <bool> (TSInfo && "NULL TypeSourceInfo for friend type declaration" ) ? void (0) : __assert_fail ("TSInfo && \"NULL TypeSourceInfo for friend type declaration\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16384, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16385 | |||||||||||
16386 | QualType T = TSInfo->getType(); | ||||||||||
16387 | SourceRange TypeRange = TSInfo->getTypeLoc().getLocalSourceRange(); | ||||||||||
16388 | |||||||||||
16389 | // C++03 [class.friend]p2: | ||||||||||
16390 | // An elaborated-type-specifier shall be used in a friend declaration | ||||||||||
16391 | // for a class.* | ||||||||||
16392 | // | ||||||||||
16393 | // * The class-key of the elaborated-type-specifier is required. | ||||||||||
16394 | if (!CodeSynthesisContexts.empty()) { | ||||||||||
16395 | // Do not complain about the form of friend template types during any kind | ||||||||||
16396 | // of code synthesis. For template instantiation, we will have complained | ||||||||||
16397 | // when the template was defined. | ||||||||||
16398 | } else { | ||||||||||
16399 | if (!T->isElaboratedTypeSpecifier()) { | ||||||||||
16400 | // If we evaluated the type to a record type, suggest putting | ||||||||||
16401 | // a tag in front. | ||||||||||
16402 | if (const RecordType *RT = T->getAs<RecordType>()) { | ||||||||||
16403 | RecordDecl *RD = RT->getDecl(); | ||||||||||
16404 | |||||||||||
16405 | SmallString<16> InsertionText(" "); | ||||||||||
16406 | InsertionText += RD->getKindName(); | ||||||||||
16407 | |||||||||||
16408 | Diag(TypeRange.getBegin(), | ||||||||||
16409 | getLangOpts().CPlusPlus11 ? | ||||||||||
16410 | diag::warn_cxx98_compat_unelaborated_friend_type : | ||||||||||
16411 | diag::ext_unelaborated_friend_type) | ||||||||||
16412 | << (unsigned) RD->getTagKind() | ||||||||||
16413 | << T | ||||||||||
16414 | << FixItHint::CreateInsertion(getLocForEndOfToken(FriendLoc), | ||||||||||
16415 | InsertionText); | ||||||||||
16416 | } else { | ||||||||||
16417 | Diag(FriendLoc, | ||||||||||
16418 | getLangOpts().CPlusPlus11 ? | ||||||||||
16419 | diag::warn_cxx98_compat_nonclass_type_friend : | ||||||||||
16420 | diag::ext_nonclass_type_friend) | ||||||||||
16421 | << T | ||||||||||
16422 | << TypeRange; | ||||||||||
16423 | } | ||||||||||
16424 | } else if (T->getAs<EnumType>()) { | ||||||||||
16425 | Diag(FriendLoc, | ||||||||||
16426 | getLangOpts().CPlusPlus11 ? | ||||||||||
16427 | diag::warn_cxx98_compat_enum_friend : | ||||||||||
16428 | diag::ext_enum_friend) | ||||||||||
16429 | << T | ||||||||||
16430 | << TypeRange; | ||||||||||
16431 | } | ||||||||||
16432 | |||||||||||
16433 | // C++11 [class.friend]p3: | ||||||||||
16434 | // A friend declaration that does not declare a function shall have one | ||||||||||
16435 | // of the following forms: | ||||||||||
16436 | // friend elaborated-type-specifier ; | ||||||||||
16437 | // friend simple-type-specifier ; | ||||||||||
16438 | // friend typename-specifier ; | ||||||||||
16439 | if (getLangOpts().CPlusPlus11 && LocStart != FriendLoc) | ||||||||||
16440 | Diag(FriendLoc, diag::err_friend_not_first_in_declaration) << T; | ||||||||||
16441 | } | ||||||||||
16442 | |||||||||||
16443 | // If the type specifier in a friend declaration designates a (possibly | ||||||||||
16444 | // cv-qualified) class type, that class is declared as a friend; otherwise, | ||||||||||
16445 | // the friend declaration is ignored. | ||||||||||
16446 | return FriendDecl::Create(Context, CurContext, | ||||||||||
16447 | TSInfo->getTypeLoc().getBeginLoc(), TSInfo, | ||||||||||
16448 | FriendLoc); | ||||||||||
16449 | } | ||||||||||
16450 | |||||||||||
16451 | /// Handle a friend tag declaration where the scope specifier was | ||||||||||
16452 | /// templated. | ||||||||||
16453 | Decl *Sema::ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, | ||||||||||
16454 | unsigned TagSpec, SourceLocation TagLoc, | ||||||||||
16455 | CXXScopeSpec &SS, IdentifierInfo *Name, | ||||||||||
16456 | SourceLocation NameLoc, | ||||||||||
16457 | const ParsedAttributesView &Attr, | ||||||||||
16458 | MultiTemplateParamsArg TempParamLists) { | ||||||||||
16459 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | ||||||||||
16460 | |||||||||||
16461 | bool IsMemberSpecialization = false; | ||||||||||
16462 | bool Invalid = false; | ||||||||||
16463 | |||||||||||
16464 | if (TemplateParameterList *TemplateParams = | ||||||||||
16465 | MatchTemplateParametersToScopeSpecifier( | ||||||||||
16466 | TagLoc, NameLoc, SS, nullptr, TempParamLists, /*friend*/ true, | ||||||||||
16467 | IsMemberSpecialization, Invalid)) { | ||||||||||
16468 | if (TemplateParams->size() > 0) { | ||||||||||
16469 | // This is a declaration of a class template. | ||||||||||
16470 | if (Invalid) | ||||||||||
16471 | return nullptr; | ||||||||||
16472 | |||||||||||
16473 | return CheckClassTemplate(S, TagSpec, TUK_Friend, TagLoc, SS, Name, | ||||||||||
16474 | NameLoc, Attr, TemplateParams, AS_public, | ||||||||||
16475 | /*ModulePrivateLoc=*/SourceLocation(), | ||||||||||
16476 | FriendLoc, TempParamLists.size() - 1, | ||||||||||
16477 | TempParamLists.data()).get(); | ||||||||||
16478 | } else { | ||||||||||
16479 | // The "template<>" header is extraneous. | ||||||||||
16480 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) | ||||||||||
16481 | << TypeWithKeyword::getTagTypeKindName(Kind) << Name; | ||||||||||
16482 | IsMemberSpecialization = true; | ||||||||||
16483 | } | ||||||||||
16484 | } | ||||||||||
16485 | |||||||||||
16486 | if (Invalid) return nullptr; | ||||||||||
16487 | |||||||||||
16488 | bool isAllExplicitSpecializations = true; | ||||||||||
16489 | for (unsigned I = TempParamLists.size(); I-- > 0; ) { | ||||||||||
16490 | if (TempParamLists[I]->size()) { | ||||||||||
16491 | isAllExplicitSpecializations = false; | ||||||||||
16492 | break; | ||||||||||
16493 | } | ||||||||||
16494 | } | ||||||||||
16495 | |||||||||||
16496 | // FIXME: don't ignore attributes. | ||||||||||
16497 | |||||||||||
16498 | // If it's explicit specializations all the way down, just forget | ||||||||||
16499 | // about the template header and build an appropriate non-templated | ||||||||||
16500 | // friend. TODO: for source fidelity, remember the headers. | ||||||||||
16501 | if (isAllExplicitSpecializations) { | ||||||||||
16502 | if (SS.isEmpty()) { | ||||||||||
16503 | bool Owned = false; | ||||||||||
16504 | bool IsDependent = false; | ||||||||||
16505 | return ActOnTag(S, TagSpec, TUK_Friend, TagLoc, SS, Name, NameLoc, | ||||||||||
16506 | Attr, AS_public, | ||||||||||
16507 | /*ModulePrivateLoc=*/SourceLocation(), | ||||||||||
16508 | MultiTemplateParamsArg(), Owned, IsDependent, | ||||||||||
16509 | /*ScopedEnumKWLoc=*/SourceLocation(), | ||||||||||
16510 | /*ScopedEnumUsesClassTag=*/false, | ||||||||||
16511 | /*UnderlyingType=*/TypeResult(), | ||||||||||
16512 | /*IsTypeSpecifier=*/false, | ||||||||||
16513 | /*IsTemplateParamOrArg=*/false); | ||||||||||
16514 | } | ||||||||||
16515 | |||||||||||
16516 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | ||||||||||
16517 | ElaboratedTypeKeyword Keyword | ||||||||||
16518 | = TypeWithKeyword::getKeywordForTagTypeKind(Kind); | ||||||||||
16519 | QualType T = CheckTypenameType(Keyword, TagLoc, QualifierLoc, | ||||||||||
16520 | *Name, NameLoc); | ||||||||||
16521 | if (T.isNull()) | ||||||||||
16522 | return nullptr; | ||||||||||
16523 | |||||||||||
16524 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); | ||||||||||
16525 | if (isa<DependentNameType>(T)) { | ||||||||||
16526 | DependentNameTypeLoc TL = | ||||||||||
16527 | TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||||||||
16528 | TL.setElaboratedKeywordLoc(TagLoc); | ||||||||||
16529 | TL.setQualifierLoc(QualifierLoc); | ||||||||||
16530 | TL.setNameLoc(NameLoc); | ||||||||||
16531 | } else { | ||||||||||
16532 | ElaboratedTypeLoc TL = TSI->getTypeLoc().castAs<ElaboratedTypeLoc>(); | ||||||||||
16533 | TL.setElaboratedKeywordLoc(TagLoc); | ||||||||||
16534 | TL.setQualifierLoc(QualifierLoc); | ||||||||||
16535 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(NameLoc); | ||||||||||
16536 | } | ||||||||||
16537 | |||||||||||
16538 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, NameLoc, | ||||||||||
16539 | TSI, FriendLoc, TempParamLists); | ||||||||||
16540 | Friend->setAccess(AS_public); | ||||||||||
16541 | CurContext->addDecl(Friend); | ||||||||||
16542 | return Friend; | ||||||||||
16543 | } | ||||||||||
16544 | |||||||||||
16545 | assert(SS.isNotEmpty() && "valid templated tag with no SS and no direct?")(static_cast <bool> (SS.isNotEmpty() && "valid templated tag with no SS and no direct?" ) ? void (0) : __assert_fail ("SS.isNotEmpty() && \"valid templated tag with no SS and no direct?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16545, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16546 | |||||||||||
16547 | |||||||||||
16548 | |||||||||||
16549 | // Handle the case of a templated-scope friend class. e.g. | ||||||||||
16550 | // template <class T> class A<T>::B; | ||||||||||
16551 | // FIXME: we don't support these right now. | ||||||||||
16552 | Diag(NameLoc, diag::warn_template_qualified_friend_unsupported) | ||||||||||
16553 | << SS.getScopeRep() << SS.getRange() << cast<CXXRecordDecl>(CurContext); | ||||||||||
16554 | ElaboratedTypeKeyword ETK = TypeWithKeyword::getKeywordForTagTypeKind(Kind); | ||||||||||
16555 | QualType T = Context.getDependentNameType(ETK, SS.getScopeRep(), Name); | ||||||||||
16556 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); | ||||||||||
16557 | DependentNameTypeLoc TL = TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||||||||
16558 | TL.setElaboratedKeywordLoc(TagLoc); | ||||||||||
16559 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||||||
16560 | TL.setNameLoc(NameLoc); | ||||||||||
16561 | |||||||||||
16562 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, NameLoc, | ||||||||||
16563 | TSI, FriendLoc, TempParamLists); | ||||||||||
16564 | Friend->setAccess(AS_public); | ||||||||||
16565 | Friend->setUnsupportedFriend(true); | ||||||||||
16566 | CurContext->addDecl(Friend); | ||||||||||
16567 | return Friend; | ||||||||||
16568 | } | ||||||||||
16569 | |||||||||||
16570 | /// Handle a friend type declaration. This works in tandem with | ||||||||||
16571 | /// ActOnTag. | ||||||||||
16572 | /// | ||||||||||
16573 | /// Notes on friend class templates: | ||||||||||
16574 | /// | ||||||||||
16575 | /// We generally treat friend class declarations as if they were | ||||||||||
16576 | /// declaring a class. So, for example, the elaborated type specifier | ||||||||||
16577 | /// in a friend declaration is required to obey the restrictions of a | ||||||||||
16578 | /// class-head (i.e. no typedefs in the scope chain), template | ||||||||||
16579 | /// parameters are required to match up with simple template-ids, &c. | ||||||||||
16580 | /// However, unlike when declaring a template specialization, it's | ||||||||||
16581 | /// okay to refer to a template specialization without an empty | ||||||||||
16582 | /// template parameter declaration, e.g. | ||||||||||
16583 | /// friend class A<T>::B<unsigned>; | ||||||||||
16584 | /// We permit this as a special case; if there are any template | ||||||||||
16585 | /// parameters present at all, require proper matching, i.e. | ||||||||||
16586 | /// template <> template \<class T> friend class A<int>::B; | ||||||||||
16587 | Decl *Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, | ||||||||||
16588 | MultiTemplateParamsArg TempParams) { | ||||||||||
16589 | SourceLocation Loc = DS.getBeginLoc(); | ||||||||||
16590 | |||||||||||
16591 | assert(DS.isFriendSpecified())(static_cast <bool> (DS.isFriendSpecified()) ? void (0) : __assert_fail ("DS.isFriendSpecified()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16591, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16592 | assert(DS.getStorageClassSpec() == DeclSpec::SCS_unspecified)(static_cast <bool> (DS.getStorageClassSpec() == DeclSpec ::SCS_unspecified) ? void (0) : __assert_fail ("DS.getStorageClassSpec() == DeclSpec::SCS_unspecified" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16592, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16593 | |||||||||||
16594 | // C++ [class.friend]p3: | ||||||||||
16595 | // A friend declaration that does not declare a function shall have one of | ||||||||||
16596 | // the following forms: | ||||||||||
16597 | // friend elaborated-type-specifier ; | ||||||||||
16598 | // friend simple-type-specifier ; | ||||||||||
16599 | // friend typename-specifier ; | ||||||||||
16600 | // | ||||||||||
16601 | // Any declaration with a type qualifier does not have that form. (It's | ||||||||||
16602 | // legal to specify a qualified type as a friend, you just can't write the | ||||||||||
16603 | // keywords.) | ||||||||||
16604 | if (DS.getTypeQualifiers()) { | ||||||||||
16605 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||||||||
16606 | Diag(DS.getConstSpecLoc(), diag::err_friend_decl_spec) << "const"; | ||||||||||
16607 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||||||||
16608 | Diag(DS.getVolatileSpecLoc(), diag::err_friend_decl_spec) << "volatile"; | ||||||||||
16609 | if (DS.getTypeQualifiers() & DeclSpec::TQ_restrict) | ||||||||||
16610 | Diag(DS.getRestrictSpecLoc(), diag::err_friend_decl_spec) << "restrict"; | ||||||||||
16611 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||||||||
16612 | Diag(DS.getAtomicSpecLoc(), diag::err_friend_decl_spec) << "_Atomic"; | ||||||||||
16613 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||||||||
16614 | Diag(DS.getUnalignedSpecLoc(), diag::err_friend_decl_spec) << "__unaligned"; | ||||||||||
16615 | } | ||||||||||
16616 | |||||||||||
16617 | // Try to convert the decl specifier to a type. This works for | ||||||||||
16618 | // friend templates because ActOnTag never produces a ClassTemplateDecl | ||||||||||
16619 | // for a TUK_Friend. | ||||||||||
16620 | Declarator TheDeclarator(DS, DeclaratorContext::Member); | ||||||||||
16621 | TypeSourceInfo *TSI = GetTypeForDeclarator(TheDeclarator, S); | ||||||||||
16622 | QualType T = TSI->getType(); | ||||||||||
16623 | if (TheDeclarator.isInvalidType()) | ||||||||||
16624 | return nullptr; | ||||||||||
16625 | |||||||||||
16626 | if (DiagnoseUnexpandedParameterPack(Loc, TSI, UPPC_FriendDeclaration)) | ||||||||||
16627 | return nullptr; | ||||||||||
16628 | |||||||||||
16629 | // This is definitely an error in C++98. It's probably meant to | ||||||||||
16630 | // be forbidden in C++0x, too, but the specification is just | ||||||||||
16631 | // poorly written. | ||||||||||
16632 | // | ||||||||||
16633 | // The problem is with declarations like the following: | ||||||||||
16634 | // template <T> friend A<T>::foo; | ||||||||||
16635 | // where deciding whether a class C is a friend or not now hinges | ||||||||||
16636 | // on whether there exists an instantiation of A that causes | ||||||||||
16637 | // 'foo' to equal C. There are restrictions on class-heads | ||||||||||
16638 | // (which we declare (by fiat) elaborated friend declarations to | ||||||||||
16639 | // be) that makes this tractable. | ||||||||||
16640 | // | ||||||||||
16641 | // FIXME: handle "template <> friend class A<T>;", which | ||||||||||
16642 | // is possibly well-formed? Who even knows? | ||||||||||
16643 | if (TempParams.size() && !T->isElaboratedTypeSpecifier()) { | ||||||||||
16644 | Diag(Loc, diag::err_tagless_friend_type_template) | ||||||||||
16645 | << DS.getSourceRange(); | ||||||||||
16646 | return nullptr; | ||||||||||
16647 | } | ||||||||||
16648 | |||||||||||
16649 | // C++98 [class.friend]p1: A friend of a class is a function | ||||||||||
16650 | // or class that is not a member of the class . . . | ||||||||||
16651 | // This is fixed in DR77, which just barely didn't make the C++03 | ||||||||||
16652 | // deadline. It's also a very silly restriction that seriously | ||||||||||
16653 | // affects inner classes and which nobody else seems to implement; | ||||||||||
16654 | // thus we never diagnose it, not even in -pedantic. | ||||||||||
16655 | // | ||||||||||
16656 | // But note that we could warn about it: it's always useless to | ||||||||||
16657 | // friend one of your own members (it's not, however, worthless to | ||||||||||
16658 | // friend a member of an arbitrary specialization of your template). | ||||||||||
16659 | |||||||||||
16660 | Decl *D; | ||||||||||
16661 | if (!TempParams.empty()) | ||||||||||
16662 | D = FriendTemplateDecl::Create(Context, CurContext, Loc, | ||||||||||
16663 | TempParams, | ||||||||||
16664 | TSI, | ||||||||||
16665 | DS.getFriendSpecLoc()); | ||||||||||
16666 | else | ||||||||||
16667 | D = CheckFriendTypeDecl(Loc, DS.getFriendSpecLoc(), TSI); | ||||||||||
16668 | |||||||||||
16669 | if (!D) | ||||||||||
16670 | return nullptr; | ||||||||||
16671 | |||||||||||
16672 | D->setAccess(AS_public); | ||||||||||
16673 | CurContext->addDecl(D); | ||||||||||
16674 | |||||||||||
16675 | return D; | ||||||||||
16676 | } | ||||||||||
16677 | |||||||||||
16678 | NamedDecl *Sema::ActOnFriendFunctionDecl(Scope *S, Declarator &D, | ||||||||||
16679 | MultiTemplateParamsArg TemplateParams) { | ||||||||||
16680 | const DeclSpec &DS = D.getDeclSpec(); | ||||||||||
16681 | |||||||||||
16682 | assert(DS.isFriendSpecified())(static_cast <bool> (DS.isFriendSpecified()) ? void (0) : __assert_fail ("DS.isFriendSpecified()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16682, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16683 | assert(DS.getStorageClassSpec() == DeclSpec::SCS_unspecified)(static_cast <bool> (DS.getStorageClassSpec() == DeclSpec ::SCS_unspecified) ? void (0) : __assert_fail ("DS.getStorageClassSpec() == DeclSpec::SCS_unspecified" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16683, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16684 | |||||||||||
16685 | SourceLocation Loc = D.getIdentifierLoc(); | ||||||||||
16686 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||||||
16687 | |||||||||||
16688 | // C++ [class.friend]p1 | ||||||||||
16689 | // A friend of a class is a function or class.... | ||||||||||
16690 | // Note that this sees through typedefs, which is intended. | ||||||||||
16691 | // It *doesn't* see through dependent types, which is correct | ||||||||||
16692 | // according to [temp.arg.type]p3: | ||||||||||
16693 | // If a declaration acquires a function type through a | ||||||||||
16694 | // type dependent on a template-parameter and this causes | ||||||||||
16695 | // a declaration that does not use the syntactic form of a | ||||||||||
16696 | // function declarator to have a function type, the program | ||||||||||
16697 | // is ill-formed. | ||||||||||
16698 | if (!TInfo->getType()->isFunctionType()) { | ||||||||||
16699 | Diag(Loc, diag::err_unexpected_friend); | ||||||||||
16700 | |||||||||||
16701 | // It might be worthwhile to try to recover by creating an | ||||||||||
16702 | // appropriate declaration. | ||||||||||
16703 | return nullptr; | ||||||||||
16704 | } | ||||||||||
16705 | |||||||||||
16706 | // C++ [namespace.memdef]p3 | ||||||||||
16707 | // - If a friend declaration in a non-local class first declares a | ||||||||||
16708 | // class or function, the friend class or function is a member | ||||||||||
16709 | // of the innermost enclosing namespace. | ||||||||||
16710 | // - The name of the friend is not found by simple name lookup | ||||||||||
16711 | // until a matching declaration is provided in that namespace | ||||||||||
16712 | // scope (either before or after the class declaration granting | ||||||||||
16713 | // friendship). | ||||||||||
16714 | // - If a friend function is called, its name may be found by the | ||||||||||
16715 | // name lookup that considers functions from namespaces and | ||||||||||
16716 | // classes associated with the types of the function arguments. | ||||||||||
16717 | // - When looking for a prior declaration of a class or a function | ||||||||||
16718 | // declared as a friend, scopes outside the innermost enclosing | ||||||||||
16719 | // namespace scope are not considered. | ||||||||||
16720 | |||||||||||
16721 | CXXScopeSpec &SS = D.getCXXScopeSpec(); | ||||||||||
16722 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||||||
16723 | assert(NameInfo.getName())(static_cast <bool> (NameInfo.getName()) ? void (0) : __assert_fail ("NameInfo.getName()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16723, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16724 | |||||||||||
16725 | // Check for unexpanded parameter packs. | ||||||||||
16726 | if (DiagnoseUnexpandedParameterPack(Loc, TInfo, UPPC_FriendDeclaration) || | ||||||||||
16727 | DiagnoseUnexpandedParameterPack(NameInfo, UPPC_FriendDeclaration) || | ||||||||||
16728 | DiagnoseUnexpandedParameterPack(SS, UPPC_FriendDeclaration)) | ||||||||||
16729 | return nullptr; | ||||||||||
16730 | |||||||||||
16731 | // The context we found the declaration in, or in which we should | ||||||||||
16732 | // create the declaration. | ||||||||||
16733 | DeclContext *DC; | ||||||||||
16734 | Scope *DCScope = S; | ||||||||||
16735 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||||||
16736 | ForExternalRedeclaration); | ||||||||||
16737 | |||||||||||
16738 | // There are five cases here. | ||||||||||
16739 | // - There's no scope specifier and we're in a local class. Only look | ||||||||||
16740 | // for functions declared in the immediately-enclosing block scope. | ||||||||||
16741 | // We recover from invalid scope qualifiers as if they just weren't there. | ||||||||||
16742 | FunctionDecl *FunctionContainingLocalClass = nullptr; | ||||||||||
16743 | if ((SS.isInvalid() || !SS.isSet()) && | ||||||||||
16744 | (FunctionContainingLocalClass = | ||||||||||
16745 | cast<CXXRecordDecl>(CurContext)->isLocalClass())) { | ||||||||||
16746 | // C++11 [class.friend]p11: | ||||||||||
16747 | // If a friend declaration appears in a local class and the name | ||||||||||
16748 | // specified is an unqualified name, a prior declaration is | ||||||||||
16749 | // looked up without considering scopes that are outside the | ||||||||||
16750 | // innermost enclosing non-class scope. For a friend function | ||||||||||
16751 | // declaration, if there is no prior declaration, the program is | ||||||||||
16752 | // ill-formed. | ||||||||||
16753 | |||||||||||
16754 | // Find the innermost enclosing non-class scope. This is the block | ||||||||||
16755 | // scope containing the local class definition (or for a nested class, | ||||||||||
16756 | // the outer local class). | ||||||||||
16757 | DCScope = S->getFnParent(); | ||||||||||
16758 | |||||||||||
16759 | // Look up the function name in the scope. | ||||||||||
16760 | Previous.clear(LookupLocalFriendName); | ||||||||||
16761 | LookupName(Previous, S, /*AllowBuiltinCreation*/false); | ||||||||||
16762 | |||||||||||
16763 | if (!Previous.empty()) { | ||||||||||
16764 | // All possible previous declarations must have the same context: | ||||||||||
16765 | // either they were declared at block scope or they are members of | ||||||||||
16766 | // one of the enclosing local classes. | ||||||||||
16767 | DC = Previous.getRepresentativeDecl()->getDeclContext(); | ||||||||||
16768 | } else { | ||||||||||
16769 | // This is ill-formed, but provide the context that we would have | ||||||||||
16770 | // declared the function in, if we were permitted to, for error recovery. | ||||||||||
16771 | DC = FunctionContainingLocalClass; | ||||||||||
16772 | } | ||||||||||
16773 | adjustContextForLocalExternDecl(DC); | ||||||||||
16774 | |||||||||||
16775 | // C++ [class.friend]p6: | ||||||||||
16776 | // A function can be defined in a friend declaration of a class if and | ||||||||||
16777 | // only if the class is a non-local class (9.8), the function name is | ||||||||||
16778 | // unqualified, and the function has namespace scope. | ||||||||||
16779 | if (D.isFunctionDefinition()) { | ||||||||||
16780 | Diag(NameInfo.getBeginLoc(), diag::err_friend_def_in_local_class); | ||||||||||
16781 | } | ||||||||||
16782 | |||||||||||
16783 | // - There's no scope specifier, in which case we just go to the | ||||||||||
16784 | // appropriate scope and look for a function or function template | ||||||||||
16785 | // there as appropriate. | ||||||||||
16786 | } else if (SS.isInvalid() || !SS.isSet()) { | ||||||||||
16787 | // C++11 [namespace.memdef]p3: | ||||||||||
16788 | // If the name in a friend declaration is neither qualified nor | ||||||||||
16789 | // a template-id and the declaration is a function or an | ||||||||||
16790 | // elaborated-type-specifier, the lookup to determine whether | ||||||||||
16791 | // the entity has been previously declared shall not consider | ||||||||||
16792 | // any scopes outside the innermost enclosing namespace. | ||||||||||
16793 | bool isTemplateId = | ||||||||||
16794 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId; | ||||||||||
16795 | |||||||||||
16796 | // Find the appropriate context according to the above. | ||||||||||
16797 | DC = CurContext; | ||||||||||
16798 | |||||||||||
16799 | // Skip class contexts. If someone can cite chapter and verse | ||||||||||
16800 | // for this behavior, that would be nice --- it's what GCC and | ||||||||||
16801 | // EDG do, and it seems like a reasonable intent, but the spec | ||||||||||
16802 | // really only says that checks for unqualified existing | ||||||||||
16803 | // declarations should stop at the nearest enclosing namespace, | ||||||||||
16804 | // not that they should only consider the nearest enclosing | ||||||||||
16805 | // namespace. | ||||||||||
16806 | while (DC->isRecord()) | ||||||||||
16807 | DC = DC->getParent(); | ||||||||||
16808 | |||||||||||
16809 | DeclContext *LookupDC = DC; | ||||||||||
16810 | while (LookupDC->isTransparentContext()) | ||||||||||
16811 | LookupDC = LookupDC->getParent(); | ||||||||||
16812 | |||||||||||
16813 | while (true) { | ||||||||||
16814 | LookupQualifiedName(Previous, LookupDC); | ||||||||||
16815 | |||||||||||
16816 | if (!Previous.empty()) { | ||||||||||
16817 | DC = LookupDC; | ||||||||||
16818 | break; | ||||||||||
16819 | } | ||||||||||
16820 | |||||||||||
16821 | if (isTemplateId) { | ||||||||||
16822 | if (isa<TranslationUnitDecl>(LookupDC)) break; | ||||||||||
16823 | } else { | ||||||||||
16824 | if (LookupDC->isFileContext()) break; | ||||||||||
16825 | } | ||||||||||
16826 | LookupDC = LookupDC->getParent(); | ||||||||||
16827 | } | ||||||||||
16828 | |||||||||||
16829 | DCScope = getScopeForDeclContext(S, DC); | ||||||||||
16830 | |||||||||||
16831 | // - There's a non-dependent scope specifier, in which case we | ||||||||||
16832 | // compute it and do a previous lookup there for a function | ||||||||||
16833 | // or function template. | ||||||||||
16834 | } else if (!SS.getScopeRep()->isDependent()) { | ||||||||||
16835 | DC = computeDeclContext(SS); | ||||||||||
16836 | if (!DC) return nullptr; | ||||||||||
16837 | |||||||||||
16838 | if (RequireCompleteDeclContext(SS, DC)) return nullptr; | ||||||||||
16839 | |||||||||||
16840 | LookupQualifiedName(Previous, DC); | ||||||||||
16841 | |||||||||||
16842 | // C++ [class.friend]p1: A friend of a class is a function or | ||||||||||
16843 | // class that is not a member of the class . . . | ||||||||||
16844 | if (DC->Equals(CurContext)) | ||||||||||
16845 | Diag(DS.getFriendSpecLoc(), | ||||||||||
16846 | getLangOpts().CPlusPlus11 ? | ||||||||||
16847 | diag::warn_cxx98_compat_friend_is_member : | ||||||||||
16848 | diag::err_friend_is_member); | ||||||||||
16849 | |||||||||||
16850 | if (D.isFunctionDefinition()) { | ||||||||||
16851 | // C++ [class.friend]p6: | ||||||||||
16852 | // A function can be defined in a friend declaration of a class if and | ||||||||||
16853 | // only if the class is a non-local class (9.8), the function name is | ||||||||||
16854 | // unqualified, and the function has namespace scope. | ||||||||||
16855 | // | ||||||||||
16856 | // FIXME: We should only do this if the scope specifier names the | ||||||||||
16857 | // innermost enclosing namespace; otherwise the fixit changes the | ||||||||||
16858 | // meaning of the code. | ||||||||||
16859 | SemaDiagnosticBuilder DB | ||||||||||
16860 | = Diag(SS.getRange().getBegin(), diag::err_qualified_friend_def); | ||||||||||
16861 | |||||||||||
16862 | DB << SS.getScopeRep(); | ||||||||||
16863 | if (DC->isFileContext()) | ||||||||||
16864 | DB << FixItHint::CreateRemoval(SS.getRange()); | ||||||||||
16865 | SS.clear(); | ||||||||||
16866 | } | ||||||||||
16867 | |||||||||||
16868 | // - There's a scope specifier that does not match any template | ||||||||||
16869 | // parameter lists, in which case we use some arbitrary context, | ||||||||||
16870 | // create a method or method template, and wait for instantiation. | ||||||||||
16871 | // - There's a scope specifier that does match some template | ||||||||||
16872 | // parameter lists, which we don't handle right now. | ||||||||||
16873 | } else { | ||||||||||
16874 | if (D.isFunctionDefinition()) { | ||||||||||
16875 | // C++ [class.friend]p6: | ||||||||||
16876 | // A function can be defined in a friend declaration of a class if and | ||||||||||
16877 | // only if the class is a non-local class (9.8), the function name is | ||||||||||
16878 | // unqualified, and the function has namespace scope. | ||||||||||
16879 | Diag(SS.getRange().getBegin(), diag::err_qualified_friend_def) | ||||||||||
16880 | << SS.getScopeRep(); | ||||||||||
16881 | } | ||||||||||
16882 | |||||||||||
16883 | DC = CurContext; | ||||||||||
16884 | assert(isa<CXXRecordDecl>(DC) && "friend declaration not in class?")(static_cast <bool> (isa<CXXRecordDecl>(DC) && "friend declaration not in class?") ? void (0) : __assert_fail ("isa<CXXRecordDecl>(DC) && \"friend declaration not in class?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16884, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16885 | } | ||||||||||
16886 | |||||||||||
16887 | if (!DC->isRecord()) { | ||||||||||
16888 | int DiagArg = -1; | ||||||||||
16889 | switch (D.getName().getKind()) { | ||||||||||
16890 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||||||||
16891 | case UnqualifiedIdKind::IK_ConstructorName: | ||||||||||
16892 | DiagArg = 0; | ||||||||||
16893 | break; | ||||||||||
16894 | case UnqualifiedIdKind::IK_DestructorName: | ||||||||||
16895 | DiagArg = 1; | ||||||||||
16896 | break; | ||||||||||
16897 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||||||||
16898 | DiagArg = 2; | ||||||||||
16899 | break; | ||||||||||
16900 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||||||||
16901 | DiagArg = 3; | ||||||||||
16902 | break; | ||||||||||
16903 | case UnqualifiedIdKind::IK_Identifier: | ||||||||||
16904 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||||||
16905 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||||||
16906 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||||||
16907 | case UnqualifiedIdKind::IK_TemplateId: | ||||||||||
16908 | break; | ||||||||||
16909 | } | ||||||||||
16910 | // This implies that it has to be an operator or function. | ||||||||||
16911 | if (DiagArg >= 0) { | ||||||||||
16912 | Diag(Loc, diag::err_introducing_special_friend) << DiagArg; | ||||||||||
16913 | return nullptr; | ||||||||||
16914 | } | ||||||||||
16915 | } | ||||||||||
16916 | |||||||||||
16917 | // FIXME: This is an egregious hack to cope with cases where the scope stack | ||||||||||
16918 | // does not contain the declaration context, i.e., in an out-of-line | ||||||||||
16919 | // definition of a class. | ||||||||||
16920 | Scope FakeDCScope(S, Scope::DeclScope, Diags); | ||||||||||
16921 | if (!DCScope) { | ||||||||||
16922 | FakeDCScope.setEntity(DC); | ||||||||||
16923 | DCScope = &FakeDCScope; | ||||||||||
16924 | } | ||||||||||
16925 | |||||||||||
16926 | bool AddToScope = true; | ||||||||||
16927 | NamedDecl *ND = ActOnFunctionDeclarator(DCScope, D, DC, TInfo, Previous, | ||||||||||
16928 | TemplateParams, AddToScope); | ||||||||||
16929 | if (!ND) return nullptr; | ||||||||||
16930 | |||||||||||
16931 | assert(ND->getLexicalDeclContext() == CurContext)(static_cast <bool> (ND->getLexicalDeclContext() == CurContext ) ? void (0) : __assert_fail ("ND->getLexicalDeclContext() == CurContext" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 16931, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
16932 | |||||||||||
16933 | // If we performed typo correction, we might have added a scope specifier | ||||||||||
16934 | // and changed the decl context. | ||||||||||
16935 | DC = ND->getDeclContext(); | ||||||||||
16936 | |||||||||||
16937 | // Add the function declaration to the appropriate lookup tables, | ||||||||||
16938 | // adjusting the redeclarations list as necessary. We don't | ||||||||||
16939 | // want to do this yet if the friending class is dependent. | ||||||||||
16940 | // | ||||||||||
16941 | // Also update the scope-based lookup if the target context's | ||||||||||
16942 | // lookup context is in lexical scope. | ||||||||||
16943 | if (!CurContext->isDependentContext()) { | ||||||||||
16944 | DC = DC->getRedeclContext(); | ||||||||||
16945 | DC->makeDeclVisibleInContext(ND); | ||||||||||
16946 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) | ||||||||||
16947 | PushOnScopeChains(ND, EnclosingScope, /*AddToContext=*/ false); | ||||||||||
16948 | } | ||||||||||
16949 | |||||||||||
16950 | FriendDecl *FrD = FriendDecl::Create(Context, CurContext, | ||||||||||
16951 | D.getIdentifierLoc(), ND, | ||||||||||
16952 | DS.getFriendSpecLoc()); | ||||||||||
16953 | FrD->setAccess(AS_public); | ||||||||||
16954 | CurContext->addDecl(FrD); | ||||||||||
16955 | |||||||||||
16956 | if (ND->isInvalidDecl()) { | ||||||||||
16957 | FrD->setInvalidDecl(); | ||||||||||
16958 | } else { | ||||||||||
16959 | if (DC->isRecord()) CheckFriendAccess(ND); | ||||||||||
16960 | |||||||||||
16961 | FunctionDecl *FD; | ||||||||||
16962 | if (FunctionTemplateDecl *FTD = dyn_cast<FunctionTemplateDecl>(ND)) | ||||||||||
16963 | FD = FTD->getTemplatedDecl(); | ||||||||||
16964 | else | ||||||||||
16965 | FD = cast<FunctionDecl>(ND); | ||||||||||
16966 | |||||||||||
16967 | // C++11 [dcl.fct.default]p4: If a friend declaration specifies a | ||||||||||
16968 | // default argument expression, that declaration shall be a definition | ||||||||||
16969 | // and shall be the only declaration of the function or function | ||||||||||
16970 | // template in the translation unit. | ||||||||||
16971 | if (functionDeclHasDefaultArgument(FD)) { | ||||||||||
16972 | // We can't look at FD->getPreviousDecl() because it may not have been set | ||||||||||
16973 | // if we're in a dependent context. If the function is known to be a | ||||||||||
16974 | // redeclaration, we will have narrowed Previous down to the right decl. | ||||||||||
16975 | if (D.isRedeclaration()) { | ||||||||||
16976 | Diag(FD->getLocation(), diag::err_friend_decl_with_def_arg_redeclared); | ||||||||||
16977 | Diag(Previous.getRepresentativeDecl()->getLocation(), | ||||||||||
16978 | diag::note_previous_declaration); | ||||||||||
16979 | } else if (!D.isFunctionDefinition()) | ||||||||||
16980 | Diag(FD->getLocation(), diag::err_friend_decl_with_def_arg_must_be_def); | ||||||||||
16981 | } | ||||||||||
16982 | |||||||||||
16983 | // Mark templated-scope function declarations as unsupported. | ||||||||||
16984 | if (FD->getNumTemplateParameterLists() && SS.isValid()) { | ||||||||||
16985 | Diag(FD->getLocation(), diag::warn_template_qualified_friend_unsupported) | ||||||||||
16986 | << SS.getScopeRep() << SS.getRange() | ||||||||||
16987 | << cast<CXXRecordDecl>(CurContext); | ||||||||||
16988 | FrD->setUnsupportedFriend(true); | ||||||||||
16989 | } | ||||||||||
16990 | } | ||||||||||
16991 | |||||||||||
16992 | warnOnReservedIdentifier(ND); | ||||||||||
16993 | |||||||||||
16994 | return ND; | ||||||||||
16995 | } | ||||||||||
16996 | |||||||||||
16997 | void Sema::SetDeclDeleted(Decl *Dcl, SourceLocation DelLoc) { | ||||||||||
16998 | AdjustDeclIfTemplate(Dcl); | ||||||||||
16999 | |||||||||||
17000 | FunctionDecl *Fn = dyn_cast_or_null<FunctionDecl>(Dcl); | ||||||||||
17001 | if (!Fn) { | ||||||||||
17002 | Diag(DelLoc, diag::err_deleted_non_function); | ||||||||||
17003 | return; | ||||||||||
17004 | } | ||||||||||
17005 | |||||||||||
17006 | // Deleted function does not have a body. | ||||||||||
17007 | Fn->setWillHaveBody(false); | ||||||||||
17008 | |||||||||||
17009 | if (const FunctionDecl *Prev = Fn->getPreviousDecl()) { | ||||||||||
17010 | // Don't consider the implicit declaration we generate for explicit | ||||||||||
17011 | // specializations. FIXME: Do not generate these implicit declarations. | ||||||||||
17012 | if ((Prev->getTemplateSpecializationKind() != TSK_ExplicitSpecialization || | ||||||||||
17013 | Prev->getPreviousDecl()) && | ||||||||||
17014 | !Prev->isDefined()) { | ||||||||||
17015 | Diag(DelLoc, diag::err_deleted_decl_not_first); | ||||||||||
17016 | Diag(Prev->getLocation().isInvalid() ? DelLoc : Prev->getLocation(), | ||||||||||
17017 | Prev->isImplicit() ? diag::note_previous_implicit_declaration | ||||||||||
17018 | : diag::note_previous_declaration); | ||||||||||
17019 | // We can't recover from this; the declaration might have already | ||||||||||
17020 | // been used. | ||||||||||
17021 | Fn->setInvalidDecl(); | ||||||||||
17022 | return; | ||||||||||
17023 | } | ||||||||||
17024 | |||||||||||
17025 | // To maintain the invariant that functions are only deleted on their first | ||||||||||
17026 | // declaration, mark the implicitly-instantiated declaration of the | ||||||||||
17027 | // explicitly-specialized function as deleted instead of marking the | ||||||||||
17028 | // instantiated redeclaration. | ||||||||||
17029 | Fn = Fn->getCanonicalDecl(); | ||||||||||
17030 | } | ||||||||||
17031 | |||||||||||
17032 | // dllimport/dllexport cannot be deleted. | ||||||||||
17033 | if (const InheritableAttr *DLLAttr = getDLLAttr(Fn)) { | ||||||||||
17034 | Diag(Fn->getLocation(), diag::err_attribute_dll_deleted) << DLLAttr; | ||||||||||
17035 | Fn->setInvalidDecl(); | ||||||||||
17036 | } | ||||||||||
17037 | |||||||||||
17038 | // C++11 [basic.start.main]p3: | ||||||||||
17039 | // A program that defines main as deleted [...] is ill-formed. | ||||||||||
17040 | if (Fn->isMain()) | ||||||||||
17041 | Diag(DelLoc, diag::err_deleted_main); | ||||||||||
17042 | |||||||||||
17043 | // C++11 [dcl.fct.def.delete]p4: | ||||||||||
17044 | // A deleted function is implicitly inline. | ||||||||||
17045 | Fn->setImplicitlyInline(); | ||||||||||
17046 | Fn->setDeletedAsWritten(); | ||||||||||
17047 | } | ||||||||||
17048 | |||||||||||
17049 | void Sema::SetDeclDefaulted(Decl *Dcl, SourceLocation DefaultLoc) { | ||||||||||
17050 | if (!Dcl || Dcl->isInvalidDecl()) | ||||||||||
17051 | return; | ||||||||||
17052 | |||||||||||
17053 | auto *FD = dyn_cast<FunctionDecl>(Dcl); | ||||||||||
17054 | if (!FD) { | ||||||||||
17055 | if (auto *FTD = dyn_cast<FunctionTemplateDecl>(Dcl)) { | ||||||||||
17056 | if (getDefaultedFunctionKind(FTD->getTemplatedDecl()).isComparison()) { | ||||||||||
17057 | Diag(DefaultLoc, diag::err_defaulted_comparison_template); | ||||||||||
17058 | return; | ||||||||||
17059 | } | ||||||||||
17060 | } | ||||||||||
17061 | |||||||||||
17062 | Diag(DefaultLoc, diag::err_default_special_members) | ||||||||||
17063 | << getLangOpts().CPlusPlus20; | ||||||||||
17064 | return; | ||||||||||
17065 | } | ||||||||||
17066 | |||||||||||
17067 | // Reject if this can't possibly be a defaultable function. | ||||||||||
17068 | DefaultedFunctionKind DefKind = getDefaultedFunctionKind(FD); | ||||||||||
17069 | if (!DefKind && | ||||||||||
17070 | // A dependent function that doesn't locally look defaultable can | ||||||||||
17071 | // still instantiate to a defaultable function if it's a constructor | ||||||||||
17072 | // or assignment operator. | ||||||||||
17073 | (!FD->isDependentContext() || | ||||||||||
17074 | (!isa<CXXConstructorDecl>(FD) && | ||||||||||
17075 | FD->getDeclName().getCXXOverloadedOperator() != OO_Equal))) { | ||||||||||
17076 | Diag(DefaultLoc, diag::err_default_special_members) | ||||||||||
17077 | << getLangOpts().CPlusPlus20; | ||||||||||
17078 | return; | ||||||||||
17079 | } | ||||||||||
17080 | |||||||||||
17081 | if (DefKind.isComparison() && | ||||||||||
17082 | !isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { | ||||||||||
17083 | Diag(FD->getLocation(), diag::err_defaulted_comparison_out_of_class) | ||||||||||
17084 | << (int)DefKind.asComparison(); | ||||||||||
17085 | return; | ||||||||||
17086 | } | ||||||||||
17087 | |||||||||||
17088 | // Issue compatibility warning. We already warned if the operator is | ||||||||||
17089 | // 'operator<=>' when parsing the '<=>' token. | ||||||||||
17090 | if (DefKind.isComparison() && | ||||||||||
17091 | DefKind.asComparison() != DefaultedComparisonKind::ThreeWay) { | ||||||||||
17092 | Diag(DefaultLoc, getLangOpts().CPlusPlus20 | ||||||||||
17093 | ? diag::warn_cxx17_compat_defaulted_comparison | ||||||||||
17094 | : diag::ext_defaulted_comparison); | ||||||||||
17095 | } | ||||||||||
17096 | |||||||||||
17097 | FD->setDefaulted(); | ||||||||||
17098 | FD->setExplicitlyDefaulted(); | ||||||||||
17099 | |||||||||||
17100 | // Defer checking functions that are defaulted in a dependent context. | ||||||||||
17101 | if (FD->isDependentContext()) | ||||||||||
17102 | return; | ||||||||||
17103 | |||||||||||
17104 | // Unset that we will have a body for this function. We might not, | ||||||||||
17105 | // if it turns out to be trivial, and we don't need this marking now | ||||||||||
17106 | // that we've marked it as defaulted. | ||||||||||
17107 | FD->setWillHaveBody(false); | ||||||||||
17108 | |||||||||||
17109 | // If this definition appears within the record, do the checking when | ||||||||||
17110 | // the record is complete. This is always the case for a defaulted | ||||||||||
17111 | // comparison. | ||||||||||
17112 | if (DefKind.isComparison()) | ||||||||||
17113 | return; | ||||||||||
17114 | auto *MD = cast<CXXMethodDecl>(FD); | ||||||||||
17115 | |||||||||||
17116 | const FunctionDecl *Primary = FD; | ||||||||||
17117 | if (const FunctionDecl *Pattern = FD->getTemplateInstantiationPattern()) | ||||||||||
17118 | // Ask the template instantiation pattern that actually had the | ||||||||||
17119 | // '= default' on it. | ||||||||||
17120 | Primary = Pattern; | ||||||||||
17121 | |||||||||||
17122 | // If the method was defaulted on its first declaration, we will have | ||||||||||
17123 | // already performed the checking in CheckCompletedCXXClass. Such a | ||||||||||
17124 | // declaration doesn't trigger an implicit definition. | ||||||||||
17125 | if (Primary->getCanonicalDecl()->isDefaulted()) | ||||||||||
17126 | return; | ||||||||||
17127 | |||||||||||
17128 | // FIXME: Once we support defining comparisons out of class, check for a | ||||||||||
17129 | // defaulted comparison here. | ||||||||||
17130 | if (CheckExplicitlyDefaultedSpecialMember(MD, DefKind.asSpecialMember())) | ||||||||||
17131 | MD->setInvalidDecl(); | ||||||||||
17132 | else | ||||||||||
17133 | DefineDefaultedFunction(*this, MD, DefaultLoc); | ||||||||||
17134 | } | ||||||||||
17135 | |||||||||||
17136 | static void SearchForReturnInStmt(Sema &Self, Stmt *S) { | ||||||||||
17137 | for (Stmt *SubStmt : S->children()) { | ||||||||||
17138 | if (!SubStmt) | ||||||||||
17139 | continue; | ||||||||||
17140 | if (isa<ReturnStmt>(SubStmt)) | ||||||||||
17141 | Self.Diag(SubStmt->getBeginLoc(), | ||||||||||
17142 | diag::err_return_in_constructor_handler); | ||||||||||
17143 | if (!isa<Expr>(SubStmt)) | ||||||||||
17144 | SearchForReturnInStmt(Self, SubStmt); | ||||||||||
17145 | } | ||||||||||
17146 | } | ||||||||||
17147 | |||||||||||
17148 | void Sema::DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock) { | ||||||||||
17149 | for (unsigned I = 0, E = TryBlock->getNumHandlers(); I != E; ++I) { | ||||||||||
17150 | CXXCatchStmt *Handler = TryBlock->getHandler(I); | ||||||||||
17151 | SearchForReturnInStmt(*this, Handler); | ||||||||||
17152 | } | ||||||||||
17153 | } | ||||||||||
17154 | |||||||||||
17155 | bool Sema::CheckOverridingFunctionAttributes(const CXXMethodDecl *New, | ||||||||||
17156 | const CXXMethodDecl *Old) { | ||||||||||
17157 | const auto *NewFT = New->getType()->castAs<FunctionProtoType>(); | ||||||||||
17158 | const auto *OldFT = Old->getType()->castAs<FunctionProtoType>(); | ||||||||||
17159 | |||||||||||
17160 | if (OldFT->hasExtParameterInfos()) { | ||||||||||
17161 | for (unsigned I = 0, E = OldFT->getNumParams(); I != E; ++I) | ||||||||||
17162 | // A parameter of the overriding method should be annotated with noescape | ||||||||||
17163 | // if the corresponding parameter of the overridden method is annotated. | ||||||||||
17164 | if (OldFT->getExtParameterInfo(I).isNoEscape() && | ||||||||||
17165 | !NewFT->getExtParameterInfo(I).isNoEscape()) { | ||||||||||
17166 | Diag(New->getParamDecl(I)->getLocation(), | ||||||||||
17167 | diag::warn_overriding_method_missing_noescape); | ||||||||||
17168 | Diag(Old->getParamDecl(I)->getLocation(), | ||||||||||
17169 | diag::note_overridden_marked_noescape); | ||||||||||
17170 | } | ||||||||||
17171 | } | ||||||||||
17172 | |||||||||||
17173 | // Virtual overrides must have the same code_seg. | ||||||||||
17174 | const auto *OldCSA = Old->getAttr<CodeSegAttr>(); | ||||||||||
17175 | const auto *NewCSA = New->getAttr<CodeSegAttr>(); | ||||||||||
17176 | if ((NewCSA || OldCSA) && | ||||||||||
17177 | (!OldCSA || !NewCSA || NewCSA->getName() != OldCSA->getName())) { | ||||||||||
17178 | Diag(New->getLocation(), diag::err_mismatched_code_seg_override); | ||||||||||
17179 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||||||
17180 | return true; | ||||||||||
17181 | } | ||||||||||
17182 | |||||||||||
17183 | CallingConv NewCC = NewFT->getCallConv(), OldCC = OldFT->getCallConv(); | ||||||||||
17184 | |||||||||||
17185 | // If the calling conventions match, everything is fine | ||||||||||
17186 | if (NewCC == OldCC) | ||||||||||
17187 | return false; | ||||||||||
17188 | |||||||||||
17189 | // If the calling conventions mismatch because the new function is static, | ||||||||||
17190 | // suppress the calling convention mismatch error; the error about static | ||||||||||
17191 | // function override (err_static_overrides_virtual from | ||||||||||
17192 | // Sema::CheckFunctionDeclaration) is more clear. | ||||||||||
17193 | if (New->getStorageClass() == SC_Static) | ||||||||||
17194 | return false; | ||||||||||
17195 | |||||||||||
17196 | Diag(New->getLocation(), | ||||||||||
17197 | diag::err_conflicting_overriding_cc_attributes) | ||||||||||
17198 | << New->getDeclName() << New->getType() << Old->getType(); | ||||||||||
17199 | Diag(Old->getLocation(), diag::note_overridden_virtual_function); | ||||||||||
17200 | return true; | ||||||||||
17201 | } | ||||||||||
17202 | |||||||||||
17203 | bool Sema::CheckOverridingFunctionReturnType(const CXXMethodDecl *New, | ||||||||||
17204 | const CXXMethodDecl *Old) { | ||||||||||
17205 | QualType NewTy = New->getType()->castAs<FunctionType>()->getReturnType(); | ||||||||||
17206 | QualType OldTy = Old->getType()->castAs<FunctionType>()->getReturnType(); | ||||||||||
17207 | |||||||||||
17208 | if (Context.hasSameType(NewTy, OldTy) || | ||||||||||
17209 | NewTy->isDependentType() || OldTy->isDependentType()) | ||||||||||
17210 | return false; | ||||||||||
17211 | |||||||||||
17212 | // Check if the return types are covariant | ||||||||||
17213 | QualType NewClassTy, OldClassTy; | ||||||||||
17214 | |||||||||||
17215 | /// Both types must be pointers or references to classes. | ||||||||||
17216 | if (const PointerType *NewPT = NewTy->getAs<PointerType>()) { | ||||||||||
17217 | if (const PointerType *OldPT = OldTy->getAs<PointerType>()) { | ||||||||||
17218 | NewClassTy = NewPT->getPointeeType(); | ||||||||||
17219 | OldClassTy = OldPT->getPointeeType(); | ||||||||||
17220 | } | ||||||||||
17221 | } else if (const ReferenceType *NewRT = NewTy->getAs<ReferenceType>()) { | ||||||||||
17222 | if (const ReferenceType *OldRT = OldTy->getAs<ReferenceType>()) { | ||||||||||
17223 | if (NewRT->getTypeClass() == OldRT->getTypeClass()) { | ||||||||||
17224 | NewClassTy = NewRT->getPointeeType(); | ||||||||||
17225 | OldClassTy = OldRT->getPointeeType(); | ||||||||||
17226 | } | ||||||||||
17227 | } | ||||||||||
17228 | } | ||||||||||
17229 | |||||||||||
17230 | // The return types aren't either both pointers or references to a class type. | ||||||||||
17231 | if (NewClassTy.isNull()) { | ||||||||||
17232 | Diag(New->getLocation(), | ||||||||||
17233 | diag::err_different_return_type_for_overriding_virtual_function) | ||||||||||
17234 | << New->getDeclName() << NewTy << OldTy | ||||||||||
17235 | << New->getReturnTypeSourceRange(); | ||||||||||
17236 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||||||
17237 | << Old->getReturnTypeSourceRange(); | ||||||||||
17238 | |||||||||||
17239 | return true; | ||||||||||
17240 | } | ||||||||||
17241 | |||||||||||
17242 | if (!Context.hasSameUnqualifiedType(NewClassTy, OldClassTy)) { | ||||||||||
17243 | // C++14 [class.virtual]p8: | ||||||||||
17244 | // If the class type in the covariant return type of D::f differs from | ||||||||||
17245 | // that of B::f, the class type in the return type of D::f shall be | ||||||||||
17246 | // complete at the point of declaration of D::f or shall be the class | ||||||||||
17247 | // type D. | ||||||||||
17248 | if (const RecordType *RT = NewClassTy->getAs<RecordType>()) { | ||||||||||
17249 | if (!RT->isBeingDefined() && | ||||||||||
17250 | RequireCompleteType(New->getLocation(), NewClassTy, | ||||||||||
17251 | diag::err_covariant_return_incomplete, | ||||||||||
17252 | New->getDeclName())) | ||||||||||
17253 | return true; | ||||||||||
17254 | } | ||||||||||
17255 | |||||||||||
17256 | // Check if the new class derives from the old class. | ||||||||||
17257 | if (!IsDerivedFrom(New->getLocation(), NewClassTy, OldClassTy)) { | ||||||||||
17258 | Diag(New->getLocation(), diag::err_covariant_return_not_derived) | ||||||||||
17259 | << New->getDeclName() << NewTy << OldTy | ||||||||||
17260 | << New->getReturnTypeSourceRange(); | ||||||||||
17261 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||||||
17262 | << Old->getReturnTypeSourceRange(); | ||||||||||
17263 | return true; | ||||||||||
17264 | } | ||||||||||
17265 | |||||||||||
17266 | // Check if we the conversion from derived to base is valid. | ||||||||||
17267 | if (CheckDerivedToBaseConversion( | ||||||||||
17268 | NewClassTy, OldClassTy, | ||||||||||
17269 | diag::err_covariant_return_inaccessible_base, | ||||||||||
17270 | diag::err_covariant_return_ambiguous_derived_to_base_conv, | ||||||||||
17271 | New->getLocation(), New->getReturnTypeSourceRange(), | ||||||||||
17272 | New->getDeclName(), nullptr)) { | ||||||||||
17273 | // FIXME: this note won't trigger for delayed access control | ||||||||||
17274 | // diagnostics, and it's impossible to get an undelayed error | ||||||||||
17275 | // here from access control during the original parse because | ||||||||||
17276 | // the ParsingDeclSpec/ParsingDeclarator are still in scope. | ||||||||||
17277 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||||||
17278 | << Old->getReturnTypeSourceRange(); | ||||||||||
17279 | return true; | ||||||||||
17280 | } | ||||||||||
17281 | } | ||||||||||
17282 | |||||||||||
17283 | // The qualifiers of the return types must be the same. | ||||||||||
17284 | if (NewTy.getLocalCVRQualifiers() != OldTy.getLocalCVRQualifiers()) { | ||||||||||
17285 | Diag(New->getLocation(), | ||||||||||
17286 | diag::err_covariant_return_type_different_qualifications) | ||||||||||
17287 | << New->getDeclName() << NewTy << OldTy | ||||||||||
17288 | << New->getReturnTypeSourceRange(); | ||||||||||
17289 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||||||
17290 | << Old->getReturnTypeSourceRange(); | ||||||||||
17291 | return true; | ||||||||||
17292 | } | ||||||||||
17293 | |||||||||||
17294 | |||||||||||
17295 | // The new class type must have the same or less qualifiers as the old type. | ||||||||||
17296 | if (NewClassTy.isMoreQualifiedThan(OldClassTy)) { | ||||||||||
17297 | Diag(New->getLocation(), | ||||||||||
17298 | diag::err_covariant_return_type_class_type_more_qualified) | ||||||||||
17299 | << New->getDeclName() << NewTy << OldTy | ||||||||||
17300 | << New->getReturnTypeSourceRange(); | ||||||||||
17301 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||||||
17302 | << Old->getReturnTypeSourceRange(); | ||||||||||
17303 | return true; | ||||||||||
17304 | } | ||||||||||
17305 | |||||||||||
17306 | return false; | ||||||||||
17307 | } | ||||||||||
17308 | |||||||||||
17309 | /// Mark the given method pure. | ||||||||||
17310 | /// | ||||||||||
17311 | /// \param Method the method to be marked pure. | ||||||||||
17312 | /// | ||||||||||
17313 | /// \param InitRange the source range that covers the "0" initializer. | ||||||||||
17314 | bool Sema::CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange) { | ||||||||||
17315 | SourceLocation EndLoc = InitRange.getEnd(); | ||||||||||
17316 | if (EndLoc.isValid()) | ||||||||||
17317 | Method->setRangeEnd(EndLoc); | ||||||||||
17318 | |||||||||||
17319 | if (Method->isVirtual() || Method->getParent()->isDependentContext()) { | ||||||||||
17320 | Method->setPure(); | ||||||||||
17321 | return false; | ||||||||||
17322 | } | ||||||||||
17323 | |||||||||||
17324 | if (!Method->isInvalidDecl()) | ||||||||||
17325 | Diag(Method->getLocation(), diag::err_non_virtual_pure) | ||||||||||
17326 | << Method->getDeclName() << InitRange; | ||||||||||
17327 | return true; | ||||||||||
17328 | } | ||||||||||
17329 | |||||||||||
17330 | void Sema::ActOnPureSpecifier(Decl *D, SourceLocation ZeroLoc) { | ||||||||||
17331 | if (D->getFriendObjectKind()) | ||||||||||
17332 | Diag(D->getLocation(), diag::err_pure_friend); | ||||||||||
17333 | else if (auto *M = dyn_cast<CXXMethodDecl>(D)) | ||||||||||
17334 | CheckPureMethod(M, ZeroLoc); | ||||||||||
17335 | else | ||||||||||
17336 | Diag(D->getLocation(), diag::err_illegal_initializer); | ||||||||||
17337 | } | ||||||||||
17338 | |||||||||||
17339 | /// Determine whether the given declaration is a global variable or | ||||||||||
17340 | /// static data member. | ||||||||||
17341 | static bool isNonlocalVariable(const Decl *D) { | ||||||||||
17342 | if (const VarDecl *Var = dyn_cast_or_null<VarDecl>(D)) | ||||||||||
17343 | return Var->hasGlobalStorage(); | ||||||||||
17344 | |||||||||||
17345 | return false; | ||||||||||
17346 | } | ||||||||||
17347 | |||||||||||
17348 | /// Invoked when we are about to parse an initializer for the declaration | ||||||||||
17349 | /// 'Dcl'. | ||||||||||
17350 | /// | ||||||||||
17351 | /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a | ||||||||||
17352 | /// static data member of class X, names should be looked up in the scope of | ||||||||||
17353 | /// class X. If the declaration had a scope specifier, a scope will have | ||||||||||
17354 | /// been created and passed in for this purpose. Otherwise, S will be null. | ||||||||||
17355 | void Sema::ActOnCXXEnterDeclInitializer(Scope *S, Decl *D) { | ||||||||||
17356 | // If there is no declaration, there was an error parsing it. | ||||||||||
17357 | if (!D || D->isInvalidDecl()) | ||||||||||
17358 | return; | ||||||||||
17359 | |||||||||||
17360 | // We will always have a nested name specifier here, but this declaration | ||||||||||
17361 | // might not be out of line if the specifier names the current namespace: | ||||||||||
17362 | // extern int n; | ||||||||||
17363 | // int ::n = 0; | ||||||||||
17364 | if (S && D->isOutOfLine()) | ||||||||||
17365 | EnterDeclaratorContext(S, D->getDeclContext()); | ||||||||||
17366 | |||||||||||
17367 | // If we are parsing the initializer for a static data member, push a | ||||||||||
17368 | // new expression evaluation context that is associated with this static | ||||||||||
17369 | // data member. | ||||||||||
17370 | if (isNonlocalVariable(D)) | ||||||||||
17371 | PushExpressionEvaluationContext( | ||||||||||
17372 | ExpressionEvaluationContext::PotentiallyEvaluated, D); | ||||||||||
17373 | } | ||||||||||
17374 | |||||||||||
17375 | /// Invoked after we are finished parsing an initializer for the declaration D. | ||||||||||
17376 | void Sema::ActOnCXXExitDeclInitializer(Scope *S, Decl *D) { | ||||||||||
17377 | // If there is no declaration, there was an error parsing it. | ||||||||||
17378 | if (!D || D->isInvalidDecl()) | ||||||||||
17379 | return; | ||||||||||
17380 | |||||||||||
17381 | if (isNonlocalVariable(D)) | ||||||||||
17382 | PopExpressionEvaluationContext(); | ||||||||||
17383 | |||||||||||
17384 | if (S && D->isOutOfLine()) | ||||||||||
17385 | ExitDeclaratorContext(S); | ||||||||||
17386 | } | ||||||||||
17387 | |||||||||||
17388 | /// ActOnCXXConditionDeclarationExpr - Parsed a condition declaration of a | ||||||||||
17389 | /// C++ if/switch/while/for statement. | ||||||||||
17390 | /// e.g: "if (int x = f()) {...}" | ||||||||||
17391 | DeclResult Sema::ActOnCXXConditionDeclaration(Scope *S, Declarator &D) { | ||||||||||
17392 | // C++ 6.4p2: | ||||||||||
17393 | // The declarator shall not specify a function or an array. | ||||||||||
17394 | // The type-specifier-seq shall not contain typedef and shall not declare a | ||||||||||
17395 | // new class or enumeration. | ||||||||||
17396 | assert(D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&(static_cast <bool> (D.getDeclSpec().getStorageClassSpec () != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class of condition decl." ) ? void (0) : __assert_fail ("D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class of condition decl.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17397, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
17397 | "Parser allowed 'typedef' as storage class of condition decl.")(static_cast <bool> (D.getDeclSpec().getStorageClassSpec () != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class of condition decl." ) ? void (0) : __assert_fail ("D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class of condition decl.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17397, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
17398 | |||||||||||
17399 | Decl *Dcl = ActOnDeclarator(S, D); | ||||||||||
17400 | if (!Dcl) | ||||||||||
17401 | return true; | ||||||||||
17402 | |||||||||||
17403 | if (isa<FunctionDecl>(Dcl)) { // The declarator shall not specify a function. | ||||||||||
17404 | Diag(Dcl->getLocation(), diag::err_invalid_use_of_function_type) | ||||||||||
17405 | << D.getSourceRange(); | ||||||||||
17406 | return true; | ||||||||||
17407 | } | ||||||||||
17408 | |||||||||||
17409 | return Dcl; | ||||||||||
17410 | } | ||||||||||
17411 | |||||||||||
17412 | void Sema::LoadExternalVTableUses() { | ||||||||||
17413 | if (!ExternalSource) | ||||||||||
17414 | return; | ||||||||||
17415 | |||||||||||
17416 | SmallVector<ExternalVTableUse, 4> VTables; | ||||||||||
17417 | ExternalSource->ReadUsedVTables(VTables); | ||||||||||
17418 | SmallVector<VTableUse, 4> NewUses; | ||||||||||
17419 | for (unsigned I = 0, N = VTables.size(); I != N; ++I) { | ||||||||||
17420 | llvm::DenseMap<CXXRecordDecl *, bool>::iterator Pos | ||||||||||
17421 | = VTablesUsed.find(VTables[I].Record); | ||||||||||
17422 | // Even if a definition wasn't required before, it may be required now. | ||||||||||
17423 | if (Pos != VTablesUsed.end()) { | ||||||||||
17424 | if (!Pos->second && VTables[I].DefinitionRequired) | ||||||||||
17425 | Pos->second = true; | ||||||||||
17426 | continue; | ||||||||||
17427 | } | ||||||||||
17428 | |||||||||||
17429 | VTablesUsed[VTables[I].Record] = VTables[I].DefinitionRequired; | ||||||||||
17430 | NewUses.push_back(VTableUse(VTables[I].Record, VTables[I].Location)); | ||||||||||
17431 | } | ||||||||||
17432 | |||||||||||
17433 | VTableUses.insert(VTableUses.begin(), NewUses.begin(), NewUses.end()); | ||||||||||
17434 | } | ||||||||||
17435 | |||||||||||
17436 | void Sema::MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, | ||||||||||
17437 | bool DefinitionRequired) { | ||||||||||
17438 | // Ignore any vtable uses in unevaluated operands or for classes that do | ||||||||||
17439 | // not have a vtable. | ||||||||||
17440 | if (!Class->isDynamicClass() || Class->isDependentContext() || | ||||||||||
17441 | CurContext->isDependentContext() || isUnevaluatedContext()) | ||||||||||
17442 | return; | ||||||||||
17443 | // Do not mark as used if compiling for the device outside of the target | ||||||||||
17444 | // region. | ||||||||||
17445 | if (TUKind != TU_Prefix && LangOpts.OpenMP && LangOpts.OpenMPIsDevice && | ||||||||||
17446 | !isInOpenMPDeclareTargetContext() && | ||||||||||
17447 | !isInOpenMPTargetExecutionDirective()) { | ||||||||||
17448 | if (!DefinitionRequired) | ||||||||||
17449 | MarkVirtualMembersReferenced(Loc, Class); | ||||||||||
17450 | return; | ||||||||||
17451 | } | ||||||||||
17452 | |||||||||||
17453 | // Try to insert this class into the map. | ||||||||||
17454 | LoadExternalVTableUses(); | ||||||||||
17455 | Class = Class->getCanonicalDecl(); | ||||||||||
17456 | std::pair<llvm::DenseMap<CXXRecordDecl *, bool>::iterator, bool> | ||||||||||
17457 | Pos = VTablesUsed.insert(std::make_pair(Class, DefinitionRequired)); | ||||||||||
17458 | if (!Pos.second) { | ||||||||||
17459 | // If we already had an entry, check to see if we are promoting this vtable | ||||||||||
17460 | // to require a definition. If so, we need to reappend to the VTableUses | ||||||||||
17461 | // list, since we may have already processed the first entry. | ||||||||||
17462 | if (DefinitionRequired && !Pos.first->second) { | ||||||||||
17463 | Pos.first->second = true; | ||||||||||
17464 | } else { | ||||||||||
17465 | // Otherwise, we can early exit. | ||||||||||
17466 | return; | ||||||||||
17467 | } | ||||||||||
17468 | } else { | ||||||||||
17469 | // The Microsoft ABI requires that we perform the destructor body | ||||||||||
17470 | // checks (i.e. operator delete() lookup) when the vtable is marked used, as | ||||||||||
17471 | // the deleting destructor is emitted with the vtable, not with the | ||||||||||
17472 | // destructor definition as in the Itanium ABI. | ||||||||||
17473 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||||||
17474 | CXXDestructorDecl *DD = Class->getDestructor(); | ||||||||||
17475 | if (DD && DD->isVirtual() && !DD->isDeleted()) { | ||||||||||
17476 | if (Class->hasUserDeclaredDestructor() && !DD->isDefined()) { | ||||||||||
17477 | // If this is an out-of-line declaration, marking it referenced will | ||||||||||
17478 | // not do anything. Manually call CheckDestructor to look up operator | ||||||||||
17479 | // delete(). | ||||||||||
17480 | ContextRAII SavedContext(*this, DD); | ||||||||||
17481 | CheckDestructor(DD); | ||||||||||
17482 | } else { | ||||||||||
17483 | MarkFunctionReferenced(Loc, Class->getDestructor()); | ||||||||||
17484 | } | ||||||||||
17485 | } | ||||||||||
17486 | } | ||||||||||
17487 | } | ||||||||||
17488 | |||||||||||
17489 | // Local classes need to have their virtual members marked | ||||||||||
17490 | // immediately. For all other classes, we mark their virtual members | ||||||||||
17491 | // at the end of the translation unit. | ||||||||||
17492 | if (Class->isLocalClass()) | ||||||||||
17493 | MarkVirtualMembersReferenced(Loc, Class); | ||||||||||
17494 | else | ||||||||||
17495 | VTableUses.push_back(std::make_pair(Class, Loc)); | ||||||||||
17496 | } | ||||||||||
17497 | |||||||||||
17498 | bool Sema::DefineUsedVTables() { | ||||||||||
17499 | LoadExternalVTableUses(); | ||||||||||
17500 | if (VTableUses.empty()) | ||||||||||
17501 | return false; | ||||||||||
17502 | |||||||||||
17503 | // Note: The VTableUses vector could grow as a result of marking | ||||||||||
17504 | // the members of a class as "used", so we check the size each | ||||||||||
17505 | // time through the loop and prefer indices (which are stable) to | ||||||||||
17506 | // iterators (which are not). | ||||||||||
17507 | bool DefinedAnything = false; | ||||||||||
17508 | for (unsigned I = 0; I != VTableUses.size(); ++I) { | ||||||||||
17509 | CXXRecordDecl *Class = VTableUses[I].first->getDefinition(); | ||||||||||
17510 | if (!Class) | ||||||||||
17511 | continue; | ||||||||||
17512 | TemplateSpecializationKind ClassTSK = | ||||||||||
17513 | Class->getTemplateSpecializationKind(); | ||||||||||
17514 | |||||||||||
17515 | SourceLocation Loc = VTableUses[I].second; | ||||||||||
17516 | |||||||||||
17517 | bool DefineVTable = true; | ||||||||||
17518 | |||||||||||
17519 | // If this class has a key function, but that key function is | ||||||||||
17520 | // defined in another translation unit, we don't need to emit the | ||||||||||
17521 | // vtable even though we're using it. | ||||||||||
17522 | const CXXMethodDecl *KeyFunction = Context.getCurrentKeyFunction(Class); | ||||||||||
17523 | if (KeyFunction && !KeyFunction->hasBody()) { | ||||||||||
17524 | // The key function is in another translation unit. | ||||||||||
17525 | DefineVTable = false; | ||||||||||
17526 | TemplateSpecializationKind TSK = | ||||||||||
17527 | KeyFunction->getTemplateSpecializationKind(); | ||||||||||
17528 | assert(TSK != TSK_ExplicitInstantiationDefinition &&(static_cast <bool> (TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && "Instantiations don't have key functions" ) ? void (0) : __assert_fail ("TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && \"Instantiations don't have key functions\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17530, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
17529 | TSK != TSK_ImplicitInstantiation &&(static_cast <bool> (TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && "Instantiations don't have key functions" ) ? void (0) : __assert_fail ("TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && \"Instantiations don't have key functions\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17530, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
17530 | "Instantiations don't have key functions")(static_cast <bool> (TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && "Instantiations don't have key functions" ) ? void (0) : __assert_fail ("TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && \"Instantiations don't have key functions\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17530, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
17531 | (void)TSK; | ||||||||||
17532 | } else if (!KeyFunction) { | ||||||||||
17533 | // If we have a class with no key function that is the subject | ||||||||||
17534 | // of an explicit instantiation declaration, suppress the | ||||||||||
17535 | // vtable; it will live with the explicit instantiation | ||||||||||
17536 | // definition. | ||||||||||
17537 | bool IsExplicitInstantiationDeclaration = | ||||||||||
17538 | ClassTSK == TSK_ExplicitInstantiationDeclaration; | ||||||||||
17539 | for (auto R : Class->redecls()) { | ||||||||||
17540 | TemplateSpecializationKind TSK | ||||||||||
17541 | = cast<CXXRecordDecl>(R)->getTemplateSpecializationKind(); | ||||||||||
17542 | if (TSK == TSK_ExplicitInstantiationDeclaration) | ||||||||||
17543 | IsExplicitInstantiationDeclaration = true; | ||||||||||
17544 | else if (TSK == TSK_ExplicitInstantiationDefinition) { | ||||||||||
17545 | IsExplicitInstantiationDeclaration = false; | ||||||||||
17546 | break; | ||||||||||
17547 | } | ||||||||||
17548 | } | ||||||||||
17549 | |||||||||||
17550 | if (IsExplicitInstantiationDeclaration) | ||||||||||
17551 | DefineVTable = false; | ||||||||||
17552 | } | ||||||||||
17553 | |||||||||||
17554 | // The exception specifications for all virtual members may be needed even | ||||||||||
17555 | // if we are not providing an authoritative form of the vtable in this TU. | ||||||||||
17556 | // We may choose to emit it available_externally anyway. | ||||||||||
17557 | if (!DefineVTable) { | ||||||||||
17558 | MarkVirtualMemberExceptionSpecsNeeded(Loc, Class); | ||||||||||
17559 | continue; | ||||||||||
17560 | } | ||||||||||
17561 | |||||||||||
17562 | // Mark all of the virtual members of this class as referenced, so | ||||||||||
17563 | // that we can build a vtable. Then, tell the AST consumer that a | ||||||||||
17564 | // vtable for this class is required. | ||||||||||
17565 | DefinedAnything = true; | ||||||||||
17566 | MarkVirtualMembersReferenced(Loc, Class); | ||||||||||
17567 | CXXRecordDecl *Canonical = Class->getCanonicalDecl(); | ||||||||||
17568 | if (VTablesUsed[Canonical]) | ||||||||||
17569 | Consumer.HandleVTable(Class); | ||||||||||
17570 | |||||||||||
17571 | // Warn if we're emitting a weak vtable. The vtable will be weak if there is | ||||||||||
17572 | // no key function or the key function is inlined. Don't warn in C++ ABIs | ||||||||||
17573 | // that lack key functions, since the user won't be able to make one. | ||||||||||
17574 | if (Context.getTargetInfo().getCXXABI().hasKeyFunctions() && | ||||||||||
17575 | Class->isExternallyVisible() && ClassTSK != TSK_ImplicitInstantiation) { | ||||||||||
17576 | const FunctionDecl *KeyFunctionDef = nullptr; | ||||||||||
17577 | if (!KeyFunction || (KeyFunction->hasBody(KeyFunctionDef) && | ||||||||||
17578 | KeyFunctionDef->isInlined())) { | ||||||||||
17579 | Diag(Class->getLocation(), | ||||||||||
17580 | ClassTSK == TSK_ExplicitInstantiationDefinition | ||||||||||
17581 | ? diag::warn_weak_template_vtable | ||||||||||
17582 | : diag::warn_weak_vtable) | ||||||||||
17583 | << Class; | ||||||||||
17584 | } | ||||||||||
17585 | } | ||||||||||
17586 | } | ||||||||||
17587 | VTableUses.clear(); | ||||||||||
17588 | |||||||||||
17589 | return DefinedAnything; | ||||||||||
17590 | } | ||||||||||
17591 | |||||||||||
17592 | void Sema::MarkVirtualMemberExceptionSpecsNeeded(SourceLocation Loc, | ||||||||||
17593 | const CXXRecordDecl *RD) { | ||||||||||
17594 | for (const auto *I : RD->methods()) | ||||||||||
17595 | if (I->isVirtual() && !I->isPure()) | ||||||||||
17596 | ResolveExceptionSpec(Loc, I->getType()->castAs<FunctionProtoType>()); | ||||||||||
17597 | } | ||||||||||
17598 | |||||||||||
17599 | void Sema::MarkVirtualMembersReferenced(SourceLocation Loc, | ||||||||||
17600 | const CXXRecordDecl *RD, | ||||||||||
17601 | bool ConstexprOnly) { | ||||||||||
17602 | // Mark all functions which will appear in RD's vtable as used. | ||||||||||
17603 | CXXFinalOverriderMap FinalOverriders; | ||||||||||
17604 | RD->getFinalOverriders(FinalOverriders); | ||||||||||
17605 | for (CXXFinalOverriderMap::const_iterator I = FinalOverriders.begin(), | ||||||||||
17606 | E = FinalOverriders.end(); | ||||||||||
17607 | I != E; ++I) { | ||||||||||
17608 | for (OverridingMethods::const_iterator OI = I->second.begin(), | ||||||||||
17609 | OE = I->second.end(); | ||||||||||
17610 | OI != OE; ++OI) { | ||||||||||
17611 | assert(OI->second.size() > 0 && "no final overrider")(static_cast <bool> (OI->second.size() > 0 && "no final overrider") ? void (0) : __assert_fail ("OI->second.size() > 0 && \"no final overrider\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17611, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
17612 | CXXMethodDecl *Overrider = OI->second.front().Method; | ||||||||||
17613 | |||||||||||
17614 | // C++ [basic.def.odr]p2: | ||||||||||
17615 | // [...] A virtual member function is used if it is not pure. [...] | ||||||||||
17616 | if (!Overrider->isPure() && (!ConstexprOnly || Overrider->isConstexpr())) | ||||||||||
17617 | MarkFunctionReferenced(Loc, Overrider); | ||||||||||
17618 | } | ||||||||||
17619 | } | ||||||||||
17620 | |||||||||||
17621 | // Only classes that have virtual bases need a VTT. | ||||||||||
17622 | if (RD->getNumVBases() == 0) | ||||||||||
17623 | return; | ||||||||||
17624 | |||||||||||
17625 | for (const auto &I : RD->bases()) { | ||||||||||
17626 | const auto *Base = | ||||||||||
17627 | cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl()); | ||||||||||
17628 | if (Base->getNumVBases() == 0) | ||||||||||
17629 | continue; | ||||||||||
17630 | MarkVirtualMembersReferenced(Loc, Base); | ||||||||||
17631 | } | ||||||||||
17632 | } | ||||||||||
17633 | |||||||||||
17634 | /// SetIvarInitializers - This routine builds initialization ASTs for the | ||||||||||
17635 | /// Objective-C implementation whose ivars need be initialized. | ||||||||||
17636 | void Sema::SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation) { | ||||||||||
17637 | if (!getLangOpts().CPlusPlus) | ||||||||||
17638 | return; | ||||||||||
17639 | if (ObjCInterfaceDecl *OID = ObjCImplementation->getClassInterface()) { | ||||||||||
17640 | SmallVector<ObjCIvarDecl*, 8> ivars; | ||||||||||
17641 | CollectIvarsToConstructOrDestruct(OID, ivars); | ||||||||||
17642 | if (ivars.empty()) | ||||||||||
17643 | return; | ||||||||||
17644 | SmallVector<CXXCtorInitializer*, 32> AllToInit; | ||||||||||
17645 | for (unsigned i = 0; i < ivars.size(); i++) { | ||||||||||
17646 | FieldDecl *Field = ivars[i]; | ||||||||||
17647 | if (Field->isInvalidDecl()) | ||||||||||
17648 | continue; | ||||||||||
17649 | |||||||||||
17650 | CXXCtorInitializer *Member; | ||||||||||
17651 | InitializedEntity InitEntity = InitializedEntity::InitializeMember(Field); | ||||||||||
17652 | InitializationKind InitKind = | ||||||||||
17653 | InitializationKind::CreateDefault(ObjCImplementation->getLocation()); | ||||||||||
17654 | |||||||||||
17655 | InitializationSequence InitSeq(*this, InitEntity, InitKind, None); | ||||||||||
17656 | ExprResult MemberInit = | ||||||||||
17657 | InitSeq.Perform(*this, InitEntity, InitKind, None); | ||||||||||
17658 | MemberInit = MaybeCreateExprWithCleanups(MemberInit); | ||||||||||
17659 | // Note, MemberInit could actually come back empty if no initialization | ||||||||||
17660 | // is required (e.g., because it would call a trivial default constructor) | ||||||||||
17661 | if (!MemberInit.get() || MemberInit.isInvalid()) | ||||||||||
17662 | continue; | ||||||||||
17663 | |||||||||||
17664 | Member = | ||||||||||
17665 | new (Context) CXXCtorInitializer(Context, Field, SourceLocation(), | ||||||||||
17666 | SourceLocation(), | ||||||||||
17667 | MemberInit.getAs<Expr>(), | ||||||||||
17668 | SourceLocation()); | ||||||||||
17669 | AllToInit.push_back(Member); | ||||||||||
17670 | |||||||||||
17671 | // Be sure that the destructor is accessible and is marked as referenced. | ||||||||||
17672 | if (const RecordType *RecordTy = | ||||||||||
17673 | Context.getBaseElementType(Field->getType()) | ||||||||||
17674 | ->getAs<RecordType>()) { | ||||||||||
17675 | CXXRecordDecl *RD = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||||||||
17676 | if (CXXDestructorDecl *Destructor = LookupDestructor(RD)) { | ||||||||||
17677 | MarkFunctionReferenced(Field->getLocation(), Destructor); | ||||||||||
17678 | CheckDestructorAccess(Field->getLocation(), Destructor, | ||||||||||
17679 | PDiag(diag::err_access_dtor_ivar) | ||||||||||
17680 | << Context.getBaseElementType(Field->getType())); | ||||||||||
17681 | } | ||||||||||
17682 | } | ||||||||||
17683 | } | ||||||||||
17684 | ObjCImplementation->setIvarInitializers(Context, | ||||||||||
17685 | AllToInit.data(), AllToInit.size()); | ||||||||||
17686 | } | ||||||||||
17687 | } | ||||||||||
17688 | |||||||||||
17689 | static | ||||||||||
17690 | void DelegatingCycleHelper(CXXConstructorDecl* Ctor, | ||||||||||
17691 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Valid, | ||||||||||
17692 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Invalid, | ||||||||||
17693 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Current, | ||||||||||
17694 | Sema &S) { | ||||||||||
17695 | if (Ctor->isInvalidDecl()) | ||||||||||
17696 | return; | ||||||||||
17697 | |||||||||||
17698 | CXXConstructorDecl *Target = Ctor->getTargetConstructor(); | ||||||||||
17699 | |||||||||||
17700 | // Target may not be determinable yet, for instance if this is a dependent | ||||||||||
17701 | // call in an uninstantiated template. | ||||||||||
17702 | if (Target) { | ||||||||||
17703 | const FunctionDecl *FNTarget = nullptr; | ||||||||||
17704 | (void)Target->hasBody(FNTarget); | ||||||||||
17705 | Target = const_cast<CXXConstructorDecl*>( | ||||||||||
17706 | cast_or_null<CXXConstructorDecl>(FNTarget)); | ||||||||||
17707 | } | ||||||||||
17708 | |||||||||||
17709 | CXXConstructorDecl *Canonical = Ctor->getCanonicalDecl(), | ||||||||||
17710 | // Avoid dereferencing a null pointer here. | ||||||||||
17711 | *TCanonical = Target? Target->getCanonicalDecl() : nullptr; | ||||||||||
17712 | |||||||||||
17713 | if (!Current.insert(Canonical).second) | ||||||||||
17714 | return; | ||||||||||
17715 | |||||||||||
17716 | // We know that beyond here, we aren't chaining into a cycle. | ||||||||||
17717 | if (!Target || !Target->isDelegatingConstructor() || | ||||||||||
17718 | Target->isInvalidDecl() || Valid.count(TCanonical)) { | ||||||||||
17719 | Valid.insert(Current.begin(), Current.end()); | ||||||||||
17720 | Current.clear(); | ||||||||||
17721 | // We've hit a cycle. | ||||||||||
17722 | } else if (TCanonical == Canonical || Invalid.count(TCanonical) || | ||||||||||
17723 | Current.count(TCanonical)) { | ||||||||||
17724 | // If we haven't diagnosed this cycle yet, do so now. | ||||||||||
17725 | if (!Invalid.count(TCanonical)) { | ||||||||||
17726 | S.Diag((*Ctor->init_begin())->getSourceLocation(), | ||||||||||
17727 | diag::warn_delegating_ctor_cycle) | ||||||||||
17728 | << Ctor; | ||||||||||
17729 | |||||||||||
17730 | // Don't add a note for a function delegating directly to itself. | ||||||||||
17731 | if (TCanonical != Canonical) | ||||||||||
17732 | S.Diag(Target->getLocation(), diag::note_it_delegates_to); | ||||||||||
17733 | |||||||||||
17734 | CXXConstructorDecl *C = Target; | ||||||||||
17735 | while (C->getCanonicalDecl() != Canonical) { | ||||||||||
17736 | const FunctionDecl *FNTarget = nullptr; | ||||||||||
17737 | (void)C->getTargetConstructor()->hasBody(FNTarget); | ||||||||||
17738 | assert(FNTarget && "Ctor cycle through bodiless function")(static_cast <bool> (FNTarget && "Ctor cycle through bodiless function" ) ? void (0) : __assert_fail ("FNTarget && \"Ctor cycle through bodiless function\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17738, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
17739 | |||||||||||
17740 | C = const_cast<CXXConstructorDecl*>( | ||||||||||
17741 | cast<CXXConstructorDecl>(FNTarget)); | ||||||||||
17742 | S.Diag(C->getLocation(), diag::note_which_delegates_to); | ||||||||||
17743 | } | ||||||||||
17744 | } | ||||||||||
17745 | |||||||||||
17746 | Invalid.insert(Current.begin(), Current.end()); | ||||||||||
17747 | Current.clear(); | ||||||||||
17748 | } else { | ||||||||||
17749 | DelegatingCycleHelper(Target, Valid, Invalid, Current, S); | ||||||||||
17750 | } | ||||||||||
17751 | } | ||||||||||
17752 | |||||||||||
17753 | |||||||||||
17754 | void Sema::CheckDelegatingCtorCycles() { | ||||||||||
17755 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> Valid, Invalid, Current; | ||||||||||
17756 | |||||||||||
17757 | for (DelegatingCtorDeclsType::iterator | ||||||||||
17758 | I = DelegatingCtorDecls.begin(ExternalSource), | ||||||||||
17759 | E = DelegatingCtorDecls.end(); | ||||||||||
17760 | I != E; ++I) | ||||||||||
17761 | DelegatingCycleHelper(*I, Valid, Invalid, Current, *this); | ||||||||||
17762 | |||||||||||
17763 | for (auto CI = Invalid.begin(), CE = Invalid.end(); CI != CE; ++CI) | ||||||||||
17764 | (*CI)->setInvalidDecl(); | ||||||||||
17765 | } | ||||||||||
17766 | |||||||||||
17767 | namespace { | ||||||||||
17768 | /// AST visitor that finds references to the 'this' expression. | ||||||||||
17769 | class FindCXXThisExpr : public RecursiveASTVisitor<FindCXXThisExpr> { | ||||||||||
17770 | Sema &S; | ||||||||||
17771 | |||||||||||
17772 | public: | ||||||||||
17773 | explicit FindCXXThisExpr(Sema &S) : S(S) { } | ||||||||||
17774 | |||||||||||
17775 | bool VisitCXXThisExpr(CXXThisExpr *E) { | ||||||||||
17776 | S.Diag(E->getLocation(), diag::err_this_static_member_func) | ||||||||||
17777 | << E->isImplicit(); | ||||||||||
17778 | return false; | ||||||||||
17779 | } | ||||||||||
17780 | }; | ||||||||||
17781 | } | ||||||||||
17782 | |||||||||||
17783 | bool Sema::checkThisInStaticMemberFunctionType(CXXMethodDecl *Method) { | ||||||||||
17784 | TypeSourceInfo *TSInfo = Method->getTypeSourceInfo(); | ||||||||||
17785 | if (!TSInfo) | ||||||||||
17786 | return false; | ||||||||||
17787 | |||||||||||
17788 | TypeLoc TL = TSInfo->getTypeLoc(); | ||||||||||
17789 | FunctionProtoTypeLoc ProtoTL = TL.getAs<FunctionProtoTypeLoc>(); | ||||||||||
17790 | if (!ProtoTL) | ||||||||||
17791 | return false; | ||||||||||
17792 | |||||||||||
17793 | // C++11 [expr.prim.general]p3: | ||||||||||
17794 | // [The expression this] shall not appear before the optional | ||||||||||
17795 | // cv-qualifier-seq and it shall not appear within the declaration of a | ||||||||||
17796 | // static member function (although its type and value category are defined | ||||||||||
17797 | // within a static member function as they are within a non-static member | ||||||||||
17798 | // function). [ Note: this is because declaration matching does not occur | ||||||||||
17799 | // until the complete declarator is known. - end note ] | ||||||||||
17800 | const FunctionProtoType *Proto = ProtoTL.getTypePtr(); | ||||||||||
17801 | FindCXXThisExpr Finder(*this); | ||||||||||
17802 | |||||||||||
17803 | // If the return type came after the cv-qualifier-seq, check it now. | ||||||||||
17804 | if (Proto->hasTrailingReturn() && | ||||||||||
17805 | !Finder.TraverseTypeLoc(ProtoTL.getReturnLoc())) | ||||||||||
17806 | return true; | ||||||||||
17807 | |||||||||||
17808 | // Check the exception specification. | ||||||||||
17809 | if (checkThisInStaticMemberFunctionExceptionSpec(Method)) | ||||||||||
17810 | return true; | ||||||||||
17811 | |||||||||||
17812 | // Check the trailing requires clause | ||||||||||
17813 | if (Expr *E = Method->getTrailingRequiresClause()) | ||||||||||
17814 | if (!Finder.TraverseStmt(E)) | ||||||||||
17815 | return true; | ||||||||||
17816 | |||||||||||
17817 | return checkThisInStaticMemberFunctionAttributes(Method); | ||||||||||
17818 | } | ||||||||||
17819 | |||||||||||
17820 | bool Sema::checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method) { | ||||||||||
17821 | TypeSourceInfo *TSInfo = Method->getTypeSourceInfo(); | ||||||||||
17822 | if (!TSInfo) | ||||||||||
17823 | return false; | ||||||||||
17824 | |||||||||||
17825 | TypeLoc TL = TSInfo->getTypeLoc(); | ||||||||||
17826 | FunctionProtoTypeLoc ProtoTL = TL.getAs<FunctionProtoTypeLoc>(); | ||||||||||
17827 | if (!ProtoTL) | ||||||||||
17828 | return false; | ||||||||||
17829 | |||||||||||
17830 | const FunctionProtoType *Proto = ProtoTL.getTypePtr(); | ||||||||||
17831 | FindCXXThisExpr Finder(*this); | ||||||||||
17832 | |||||||||||
17833 | switch (Proto->getExceptionSpecType()) { | ||||||||||
17834 | case EST_Unparsed: | ||||||||||
17835 | case EST_Uninstantiated: | ||||||||||
17836 | case EST_Unevaluated: | ||||||||||
17837 | case EST_BasicNoexcept: | ||||||||||
17838 | case EST_NoThrow: | ||||||||||
17839 | case EST_DynamicNone: | ||||||||||
17840 | case EST_MSAny: | ||||||||||
17841 | case EST_None: | ||||||||||
17842 | break; | ||||||||||
17843 | |||||||||||
17844 | case EST_DependentNoexcept: | ||||||||||
17845 | case EST_NoexceptFalse: | ||||||||||
17846 | case EST_NoexceptTrue: | ||||||||||
17847 | if (!Finder.TraverseStmt(Proto->getNoexceptExpr())) | ||||||||||
17848 | return true; | ||||||||||
17849 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||||||
17850 | |||||||||||
17851 | case EST_Dynamic: | ||||||||||
17852 | for (const auto &E : Proto->exceptions()) { | ||||||||||
17853 | if (!Finder.TraverseType(E)) | ||||||||||
17854 | return true; | ||||||||||
17855 | } | ||||||||||
17856 | break; | ||||||||||
17857 | } | ||||||||||
17858 | |||||||||||
17859 | return false; | ||||||||||
17860 | } | ||||||||||
17861 | |||||||||||
17862 | bool Sema::checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method) { | ||||||||||
17863 | FindCXXThisExpr Finder(*this); | ||||||||||
17864 | |||||||||||
17865 | // Check attributes. | ||||||||||
17866 | for (const auto *A : Method->attrs()) { | ||||||||||
17867 | // FIXME: This should be emitted by tblgen. | ||||||||||
17868 | Expr *Arg = nullptr; | ||||||||||
17869 | ArrayRef<Expr *> Args; | ||||||||||
17870 | if (const auto *G = dyn_cast<GuardedByAttr>(A)) | ||||||||||
17871 | Arg = G->getArg(); | ||||||||||
17872 | else if (const auto *G = dyn_cast<PtGuardedByAttr>(A)) | ||||||||||
17873 | Arg = G->getArg(); | ||||||||||
17874 | else if (const auto *AA = dyn_cast<AcquiredAfterAttr>(A)) | ||||||||||
17875 | Args = llvm::makeArrayRef(AA->args_begin(), AA->args_size()); | ||||||||||
17876 | else if (const auto *AB = dyn_cast<AcquiredBeforeAttr>(A)) | ||||||||||
17877 | Args = llvm::makeArrayRef(AB->args_begin(), AB->args_size()); | ||||||||||
17878 | else if (const auto *ETLF = dyn_cast<ExclusiveTrylockFunctionAttr>(A)) { | ||||||||||
17879 | Arg = ETLF->getSuccessValue(); | ||||||||||
17880 | Args = llvm::makeArrayRef(ETLF->args_begin(), ETLF->args_size()); | ||||||||||
17881 | } else if (const auto *STLF = dyn_cast<SharedTrylockFunctionAttr>(A)) { | ||||||||||
17882 | Arg = STLF->getSuccessValue(); | ||||||||||
17883 | Args = llvm::makeArrayRef(STLF->args_begin(), STLF->args_size()); | ||||||||||
17884 | } else if (const auto *LR = dyn_cast<LockReturnedAttr>(A)) | ||||||||||
17885 | Arg = LR->getArg(); | ||||||||||
17886 | else if (const auto *LE = dyn_cast<LocksExcludedAttr>(A)) | ||||||||||
17887 | Args = llvm::makeArrayRef(LE->args_begin(), LE->args_size()); | ||||||||||
17888 | else if (const auto *RC = dyn_cast<RequiresCapabilityAttr>(A)) | ||||||||||
17889 | Args = llvm::makeArrayRef(RC->args_begin(), RC->args_size()); | ||||||||||
17890 | else if (const auto *AC = dyn_cast<AcquireCapabilityAttr>(A)) | ||||||||||
17891 | Args = llvm::makeArrayRef(AC->args_begin(), AC->args_size()); | ||||||||||
17892 | else if (const auto *AC = dyn_cast<TryAcquireCapabilityAttr>(A)) | ||||||||||
17893 | Args = llvm::makeArrayRef(AC->args_begin(), AC->args_size()); | ||||||||||
17894 | else if (const auto *RC = dyn_cast<ReleaseCapabilityAttr>(A)) | ||||||||||
17895 | Args = llvm::makeArrayRef(RC->args_begin(), RC->args_size()); | ||||||||||
17896 | |||||||||||
17897 | if (Arg && !Finder.TraverseStmt(Arg)) | ||||||||||
17898 | return true; | ||||||||||
17899 | |||||||||||
17900 | for (unsigned I = 0, N = Args.size(); I != N; ++I) { | ||||||||||
17901 | if (!Finder.TraverseStmt(Args[I])) | ||||||||||
17902 | return true; | ||||||||||
17903 | } | ||||||||||
17904 | } | ||||||||||
17905 | |||||||||||
17906 | return false; | ||||||||||
17907 | } | ||||||||||
17908 | |||||||||||
17909 | void Sema::checkExceptionSpecification( | ||||||||||
17910 | bool IsTopLevel, ExceptionSpecificationType EST, | ||||||||||
17911 | ArrayRef<ParsedType> DynamicExceptions, | ||||||||||
17912 | ArrayRef<SourceRange> DynamicExceptionRanges, Expr *NoexceptExpr, | ||||||||||
17913 | SmallVectorImpl<QualType> &Exceptions, | ||||||||||
17914 | FunctionProtoType::ExceptionSpecInfo &ESI) { | ||||||||||
17915 | Exceptions.clear(); | ||||||||||
17916 | ESI.Type = EST; | ||||||||||
17917 | if (EST == EST_Dynamic) { | ||||||||||
17918 | Exceptions.reserve(DynamicExceptions.size()); | ||||||||||
17919 | for (unsigned ei = 0, ee = DynamicExceptions.size(); ei != ee; ++ei) { | ||||||||||
17920 | // FIXME: Preserve type source info. | ||||||||||
17921 | QualType ET = GetTypeFromParser(DynamicExceptions[ei]); | ||||||||||
17922 | |||||||||||
17923 | if (IsTopLevel) { | ||||||||||
17924 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; | ||||||||||
17925 | collectUnexpandedParameterPacks(ET, Unexpanded); | ||||||||||
17926 | if (!Unexpanded.empty()) { | ||||||||||
17927 | DiagnoseUnexpandedParameterPacks( | ||||||||||
17928 | DynamicExceptionRanges[ei].getBegin(), UPPC_ExceptionType, | ||||||||||
17929 | Unexpanded); | ||||||||||
17930 | continue; | ||||||||||
17931 | } | ||||||||||
17932 | } | ||||||||||
17933 | |||||||||||
17934 | // Check that the type is valid for an exception spec, and | ||||||||||
17935 | // drop it if not. | ||||||||||
17936 | if (!CheckSpecifiedExceptionType(ET, DynamicExceptionRanges[ei])) | ||||||||||
17937 | Exceptions.push_back(ET); | ||||||||||
17938 | } | ||||||||||
17939 | ESI.Exceptions = Exceptions; | ||||||||||
17940 | return; | ||||||||||
17941 | } | ||||||||||
17942 | |||||||||||
17943 | if (isComputedNoexcept(EST)) { | ||||||||||
17944 | assert((NoexceptExpr->isTypeDependent() ||(static_cast <bool> ((NoexceptExpr->isTypeDependent( ) || NoexceptExpr->getType()->getCanonicalTypeUnqualified () == Context.BoolTy) && "Parser should have made sure that the expression is boolean" ) ? void (0) : __assert_fail ("(NoexceptExpr->isTypeDependent() || NoexceptExpr->getType()->getCanonicalTypeUnqualified() == Context.BoolTy) && \"Parser should have made sure that the expression is boolean\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17947, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
17945 | NoexceptExpr->getType()->getCanonicalTypeUnqualified() ==(static_cast <bool> ((NoexceptExpr->isTypeDependent( ) || NoexceptExpr->getType()->getCanonicalTypeUnqualified () == Context.BoolTy) && "Parser should have made sure that the expression is boolean" ) ? void (0) : __assert_fail ("(NoexceptExpr->isTypeDependent() || NoexceptExpr->getType()->getCanonicalTypeUnqualified() == Context.BoolTy) && \"Parser should have made sure that the expression is boolean\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17947, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
17946 | Context.BoolTy) &&(static_cast <bool> ((NoexceptExpr->isTypeDependent( ) || NoexceptExpr->getType()->getCanonicalTypeUnqualified () == Context.BoolTy) && "Parser should have made sure that the expression is boolean" ) ? void (0) : __assert_fail ("(NoexceptExpr->isTypeDependent() || NoexceptExpr->getType()->getCanonicalTypeUnqualified() == Context.BoolTy) && \"Parser should have made sure that the expression is boolean\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17947, __extension__ __PRETTY_FUNCTION__)) | ||||||||||
17947 | "Parser should have made sure that the expression is boolean")(static_cast <bool> ((NoexceptExpr->isTypeDependent( ) || NoexceptExpr->getType()->getCanonicalTypeUnqualified () == Context.BoolTy) && "Parser should have made sure that the expression is boolean" ) ? void (0) : __assert_fail ("(NoexceptExpr->isTypeDependent() || NoexceptExpr->getType()->getCanonicalTypeUnqualified() == Context.BoolTy) && \"Parser should have made sure that the expression is boolean\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/lib/Sema/SemaDeclCXX.cpp" , 17947, __extension__ __PRETTY_FUNCTION__)); | ||||||||||
17948 | if (IsTopLevel && DiagnoseUnexpandedParameterPack(NoexceptExpr)) { | ||||||||||
17949 | ESI.Type = EST_BasicNoexcept; | ||||||||||
17950 | return; | ||||||||||
17951 | } | ||||||||||
17952 | |||||||||||
17953 | ESI.NoexceptExpr = NoexceptExpr; | ||||||||||
17954 | return; | ||||||||||
17955 | } | ||||||||||
17956 | } | ||||||||||
17957 | |||||||||||
17958 | void Sema::actOnDelayedExceptionSpecification(Decl *MethodD, | ||||||||||
17959 | ExceptionSpecificationType EST, | ||||||||||
17960 | SourceRange SpecificationRange, | ||||||||||
17961 | ArrayRef<ParsedType> DynamicExceptions, | ||||||||||
17962 | ArrayRef<SourceRange> DynamicExceptionRanges, | ||||||||||
17963 | Expr *NoexceptExpr) { | ||||||||||
17964 | if (!MethodD) | ||||||||||
17965 | return; | ||||||||||
17966 | |||||||||||
17967 | // Dig out the method we're referring to. | ||||||||||
17968 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(MethodD)) | ||||||||||
17969 | MethodD = FunTmpl->getTemplatedDecl(); | ||||||||||
17970 | |||||||||||
17971 | CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(MethodD); | ||||||||||
17972 | if (!Method) | ||||||||||
17973 | return; | ||||||||||
17974 | |||||||||||
17975 | // Check the exception specification. | ||||||||||
17976 | llvm::SmallVector<QualType, 4> Exceptions; | ||||||||||
17977 | FunctionProtoType::ExceptionSpecInfo ESI; | ||||||||||
17978 | checkExceptionSpecification(/*IsTopLevel*/true, EST, DynamicExceptions, | ||||||||||
17979 | DynamicExceptionRanges, NoexceptExpr, Exceptions, | ||||||||||
17980 | ESI); | ||||||||||
17981 | |||||||||||
17982 | // Update the exception specification on the function type. | ||||||||||
17983 | Context.adjustExceptionSpec(Method, ESI, /*AsWritten*/true); | ||||||||||
17984 | |||||||||||
17985 | if (Method->isStatic()) | ||||||||||
17986 | checkThisInStaticMemberFunctionExceptionSpec(Method); | ||||||||||
17987 | |||||||||||
17988 | if (Method->isVirtual()) { | ||||||||||
17989 | // Check overrides, which we previously had to delay. | ||||||||||
17990 | for (const CXXMethodDecl *O : Method->overridden_methods()) | ||||||||||
17991 | CheckOverridingFunctionExceptionSpec(Method, O); | ||||||||||
17992 | } | ||||||||||
17993 | } | ||||||||||
17994 | |||||||||||
17995 | /// HandleMSProperty - Analyze a __delcspec(property) field of a C++ class. | ||||||||||
17996 | /// | ||||||||||
17997 | MSPropertyDecl *Sema::HandleMSProperty(Scope *S, RecordDecl *Record, | ||||||||||
17998 | SourceLocation DeclStart, Declarator &D, | ||||||||||
17999 | Expr *BitWidth, | ||||||||||
18000 | InClassInitStyle InitStyle, | ||||||||||
18001 | AccessSpecifier AS, | ||||||||||
18002 | const ParsedAttr &MSPropertyAttr) { | ||||||||||
18003 | IdentifierInfo *II = D.getIdentifier(); | ||||||||||
18004 | if (!II) { | ||||||||||
18005 | Diag(DeclStart, diag::err_anonymous_property); | ||||||||||
18006 | return nullptr; | ||||||||||
18007 | } | ||||||||||
18008 | SourceLocation Loc = D.getIdentifierLoc(); | ||||||||||
18009 | |||||||||||
18010 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||||||
18011 | QualType T = TInfo->getType(); | ||||||||||
18012 | if (getLangOpts().CPlusPlus) { | ||||||||||
18013 | CheckExtraCXXDefaultArguments(D); | ||||||||||
18014 | |||||||||||
18015 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||||||
18016 | UPPC_DataMemberType)) { | ||||||||||
18017 | D.setInvalidType(); | ||||||||||
18018 | T = Context.IntTy; | ||||||||||
18019 | TInfo = Context.getTrivialTypeSourceInfo(T, Loc); | ||||||||||
18020 | } | ||||||||||
18021 | } | ||||||||||
18022 | |||||||||||
18023 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||||||
18024 | |||||||||||
18025 | if (D.getDeclSpec().isInlineSpecified()) | ||||||||||
18026 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||||||
18027 | << getLangOpts().CPlusPlus17; | ||||||||||
18028 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||||||||
18029 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||||||
18030 | diag::err_invalid_thread) | ||||||||||
18031 | << DeclSpec::getSpecifierName(TSCS); | ||||||||||
18032 | |||||||||||
18033 | // Check to see if this name was declared as a member previously | ||||||||||
18034 | NamedDecl *PrevDecl = nullptr; | ||||||||||
18035 | LookupResult Previous(*this, II, Loc, LookupMemberName, | ||||||||||
18036 | ForVisibleRedeclaration); | ||||||||||
18037 | LookupName(Previous, S); | ||||||||||
18038 | switch (Previous.getResultKind()) { | ||||||||||
18039 | case LookupResult::Found: | ||||||||||
18040 | case LookupResult::FoundUnresolvedValue: | ||||||||||
18041 | PrevDecl = Previous.getAsSingle<NamedDecl>(); | ||||||||||
18042 | break; | ||||||||||
18043 | |||||||||||
18044 | case LookupResult::FoundOverloaded: | ||||||||||
18045 | PrevDecl = Previous.getRepresentativeDecl(); | ||||||||||
18046 | break; | ||||||||||
18047 | |||||||||||
18048 | case LookupResult::NotFound: | ||||||||||
18049 | case LookupResult::NotFoundInCurrentInstantiation: | ||||||||||
18050 | case LookupResult::Ambiguous: | ||||||||||
18051 | break; | ||||||||||
18052 | } | ||||||||||
18053 | |||||||||||
18054 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | ||||||||||
18055 | // Maybe we will complain about the shadowed template parameter. | ||||||||||
18056 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||||||
18057 | // Just pretend that we didn't see the previous declaration. | ||||||||||
18058 | PrevDecl = nullptr; | ||||||||||
18059 | } | ||||||||||
18060 | |||||||||||
18061 | if (PrevDecl && !isDeclInScope(PrevDecl, Record, S)) | ||||||||||
18062 | PrevDecl = nullptr; | ||||||||||
18063 | |||||||||||
18064 | SourceLocation TSSL = D.getBeginLoc(); | ||||||||||
18065 | MSPropertyDecl *NewPD = | ||||||||||
18066 | MSPropertyDecl::Create(Context, Record, Loc, II, T, TInfo, TSSL, | ||||||||||
18067 | MSPropertyAttr.getPropertyDataGetter(), | ||||||||||
18068 | MSPropertyAttr.getPropertyDataSetter()); | ||||||||||
18069 | ProcessDeclAttributes(TUScope, NewPD, D); | ||||||||||
18070 | NewPD->setAccess(AS); | ||||||||||
18071 | |||||||||||
18072 | if (NewPD->isInvalidDecl()) | ||||||||||
18073 | Record->setInvalidDecl(); | ||||||||||
18074 | |||||||||||
18075 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||||||
18076 | NewPD->setModulePrivate(); | ||||||||||
18077 | |||||||||||
18078 | if (NewPD->isInvalidDecl() && PrevDecl) { | ||||||||||
18079 | // Don't introduce NewFD into scope; there's already something | ||||||||||
18080 | // with the same name in the same scope. | ||||||||||
18081 | } else if (II) { | ||||||||||
18082 | PushOnScopeChains(NewPD, S); | ||||||||||
18083 | } else | ||||||||||
18084 | Record->addDecl(NewPD); | ||||||||||
18085 | |||||||||||
18086 | return NewPD; | ||||||||||
18087 | } | ||||||||||
18088 | |||||||||||
18089 | void Sema::ActOnStartFunctionDeclarationDeclarator( | ||||||||||
18090 | Declarator &Declarator, unsigned TemplateParameterDepth) { | ||||||||||
18091 | auto &Info = InventedParameterInfos.emplace_back(); | ||||||||||
18092 | TemplateParameterList *ExplicitParams = nullptr; | ||||||||||
18093 | ArrayRef<TemplateParameterList *> ExplicitLists = | ||||||||||
18094 | Declarator.getTemplateParameterLists(); | ||||||||||
18095 | if (!ExplicitLists.empty()) { | ||||||||||
18096 | bool IsMemberSpecialization, IsInvalid; | ||||||||||
18097 | ExplicitParams = MatchTemplateParametersToScopeSpecifier( | ||||||||||
18098 | Declarator.getBeginLoc(), Declarator.getIdentifierLoc(), | ||||||||||
18099 | Declarator.getCXXScopeSpec(), /*TemplateId=*/nullptr, | ||||||||||
18100 | ExplicitLists, /*IsFriend=*/false, IsMemberSpecialization, IsInvalid, | ||||||||||
18101 | /*SuppressDiagnostic=*/true); | ||||||||||
18102 | } | ||||||||||
18103 | if (ExplicitParams) { | ||||||||||
18104 | Info.AutoTemplateParameterDepth = ExplicitParams->getDepth(); | ||||||||||
18105 | for (NamedDecl *Param : *ExplicitParams) | ||||||||||
18106 | Info.TemplateParams.push_back(Param); | ||||||||||
18107 | Info.NumExplicitTemplateParams = ExplicitParams->size(); | ||||||||||
18108 | } else { | ||||||||||
18109 | Info.AutoTemplateParameterDepth = TemplateParameterDepth; | ||||||||||
18110 | Info.NumExplicitTemplateParams = 0; | ||||||||||
18111 | } | ||||||||||
18112 | } | ||||||||||
18113 | |||||||||||
18114 | void Sema::ActOnFinishFunctionDeclarationDeclarator(Declarator &Declarator) { | ||||||||||
18115 | auto &FSI = InventedParameterInfos.back(); | ||||||||||
18116 | if (FSI.TemplateParams.size() > FSI.NumExplicitTemplateParams) { | ||||||||||
18117 | if (FSI.NumExplicitTemplateParams != 0) { | ||||||||||
18118 | TemplateParameterList *ExplicitParams = | ||||||||||
18119 | Declarator.getTemplateParameterLists().back(); | ||||||||||
18120 | Declarator.setInventedTemplateParameterList( | ||||||||||
18121 | TemplateParameterList::Create( | ||||||||||
18122 | Context, ExplicitParams->getTemplateLoc(), | ||||||||||
18123 | ExplicitParams->getLAngleLoc(), FSI.TemplateParams, | ||||||||||
18124 | ExplicitParams->getRAngleLoc(), | ||||||||||
18125 | ExplicitParams->getRequiresClause())); | ||||||||||
18126 | } else { | ||||||||||
18127 | Declarator.setInventedTemplateParameterList( | ||||||||||
18128 | TemplateParameterList::Create( | ||||||||||
18129 | Context, SourceLocation(), SourceLocation(), FSI.TemplateParams, | ||||||||||
18130 | SourceLocation(), /*RequiresClause=*/nullptr)); | ||||||||||
18131 | } | ||||||||||
18132 | } | ||||||||||
18133 | InventedParameterInfos.pop_back(); | ||||||||||
18134 | } |
1 | //===- Ownership.h - Parser ownership helpers -------------------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file contains classes for managing ownership of Stmt and Expr nodes. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_CLANG_SEMA_OWNERSHIP_H |
14 | #define LLVM_CLANG_SEMA_OWNERSHIP_H |
15 | |
16 | #include "clang/AST/Expr.h" |
17 | #include "clang/Basic/LLVM.h" |
18 | #include "llvm/ADT/ArrayRef.h" |
19 | #include "llvm/Support/PointerLikeTypeTraits.h" |
20 | #include "llvm/Support/type_traits.h" |
21 | #include <cassert> |
22 | #include <cstddef> |
23 | #include <cstdint> |
24 | |
25 | //===----------------------------------------------------------------------===// |
26 | // OpaquePtr |
27 | //===----------------------------------------------------------------------===// |
28 | |
29 | namespace clang { |
30 | |
31 | class CXXBaseSpecifier; |
32 | class CXXCtorInitializer; |
33 | class Decl; |
34 | class Expr; |
35 | class ParsedTemplateArgument; |
36 | class QualType; |
37 | class Stmt; |
38 | class TemplateName; |
39 | class TemplateParameterList; |
40 | |
41 | /// Wrapper for void* pointer. |
42 | /// \tparam PtrTy Either a pointer type like 'T*' or a type that behaves like |
43 | /// a pointer. |
44 | /// |
45 | /// This is a very simple POD type that wraps a pointer that the Parser |
46 | /// doesn't know about but that Sema or another client does. The PtrTy |
47 | /// template argument is used to make sure that "Decl" pointers are not |
48 | /// compatible with "Type" pointers for example. |
49 | template <class PtrTy> |
50 | class OpaquePtr { |
51 | void *Ptr = nullptr; |
52 | |
53 | explicit OpaquePtr(void *Ptr) : Ptr(Ptr) {} |
54 | |
55 | using Traits = llvm::PointerLikeTypeTraits<PtrTy>; |
56 | |
57 | public: |
58 | OpaquePtr(std::nullptr_t = nullptr) {} |
59 | |
60 | static OpaquePtr make(PtrTy P) { OpaquePtr OP; OP.set(P); return OP; } |
61 | |
62 | /// Returns plain pointer to the entity pointed by this wrapper. |
63 | /// \tparam PointeeT Type of pointed entity. |
64 | /// |
65 | /// It is identical to getPtrAs<PointeeT*>. |
66 | template <typename PointeeT> PointeeT* getPtrTo() const { |
67 | return get(); |
68 | } |
69 | |
70 | /// Returns pointer converted to the specified type. |
71 | /// \tparam PtrT Result pointer type. There must be implicit conversion |
72 | /// from PtrTy to PtrT. |
73 | /// |
74 | /// In contrast to getPtrTo, this method allows the return type to be |
75 | /// a smart pointer. |
76 | template <typename PtrT> PtrT getPtrAs() const { |
77 | return get(); |
78 | } |
79 | |
80 | PtrTy get() const { |
81 | return Traits::getFromVoidPointer(Ptr); |
82 | } |
83 | |
84 | void set(PtrTy P) { |
85 | Ptr = Traits::getAsVoidPointer(P); |
86 | } |
87 | |
88 | explicit operator bool() const { return Ptr != nullptr; } |
89 | |
90 | void *getAsOpaquePtr() const { return Ptr; } |
91 | static OpaquePtr getFromOpaquePtr(void *P) { return OpaquePtr(P); } |
92 | }; |
93 | |
94 | /// UnionOpaquePtr - A version of OpaquePtr suitable for membership |
95 | /// in a union. |
96 | template <class T> struct UnionOpaquePtr { |
97 | void *Ptr; |
98 | |
99 | static UnionOpaquePtr make(OpaquePtr<T> P) { |
100 | UnionOpaquePtr OP = { P.getAsOpaquePtr() }; |
101 | return OP; |
102 | } |
103 | |
104 | OpaquePtr<T> get() const { return OpaquePtr<T>::getFromOpaquePtr(Ptr); } |
105 | operator OpaquePtr<T>() const { return get(); } |
106 | |
107 | UnionOpaquePtr &operator=(OpaquePtr<T> P) { |
108 | Ptr = P.getAsOpaquePtr(); |
109 | return *this; |
110 | } |
111 | }; |
112 | |
113 | } // namespace clang |
114 | |
115 | namespace llvm { |
116 | |
117 | template <class T> |
118 | struct PointerLikeTypeTraits<clang::OpaquePtr<T>> { |
119 | static constexpr int NumLowBitsAvailable = 0; |
120 | |
121 | static inline void *getAsVoidPointer(clang::OpaquePtr<T> P) { |
122 | // FIXME: Doesn't work? return P.getAs< void >(); |
123 | return P.getAsOpaquePtr(); |
124 | } |
125 | |
126 | static inline clang::OpaquePtr<T> getFromVoidPointer(void *P) { |
127 | return clang::OpaquePtr<T>::getFromOpaquePtr(P); |
128 | } |
129 | }; |
130 | |
131 | } // namespace llvm |
132 | |
133 | namespace clang { |
134 | |
135 | // Basic |
136 | class StreamingDiagnostic; |
137 | |
138 | // Determines whether the low bit of the result pointer for the |
139 | // given UID is always zero. If so, ActionResult will use that bit |
140 | // for it's "invalid" flag. |
141 | template <class Ptr> struct IsResultPtrLowBitFree { |
142 | static const bool value = false; |
143 | }; |
144 | |
145 | /// ActionResult - This structure is used while parsing/acting on |
146 | /// expressions, stmts, etc. It encapsulates both the object returned by |
147 | /// the action, plus a sense of whether or not it is valid. |
148 | /// When CompressInvalid is true, the "invalid" flag will be |
149 | /// stored in the low bit of the Val pointer. |
150 | template<class PtrTy, |
151 | bool CompressInvalid = IsResultPtrLowBitFree<PtrTy>::value> |
152 | class ActionResult { |
153 | PtrTy Val; |
154 | bool Invalid; |
155 | |
156 | public: |
157 | ActionResult(bool Invalid = false) : Val(PtrTy()), Invalid(Invalid) {} |
158 | ActionResult(PtrTy val) : Val(val), Invalid(false) {} |
159 | ActionResult(const DiagnosticBuilder &) : Val(PtrTy()), Invalid(true) {} |
160 | |
161 | // These two overloads prevent void* -> bool conversions. |
162 | ActionResult(const void *) = delete; |
163 | ActionResult(volatile void *) = delete; |
164 | |
165 | bool isInvalid() const { return Invalid; } |
166 | bool isUsable() const { return !Invalid && Val; } |
167 | bool isUnset() const { return !Invalid && !Val; } |
168 | |
169 | PtrTy get() const { return Val; } |
170 | template <typename T> T *getAs() { return static_cast<T*>(get()); } |
171 | |
172 | void set(PtrTy V) { Val = V; } |
173 | |
174 | const ActionResult &operator=(PtrTy RHS) { |
175 | Val = RHS; |
176 | Invalid = false; |
177 | return *this; |
178 | } |
179 | }; |
180 | |
181 | // This ActionResult partial specialization places the "invalid" |
182 | // flag into the low bit of the pointer. |
183 | template<typename PtrTy> |
184 | class ActionResult<PtrTy, true> { |
185 | // A pointer whose low bit is 1 if this result is invalid, 0 |
186 | // otherwise. |
187 | uintptr_t PtrWithInvalid; |
188 | |
189 | using PtrTraits = llvm::PointerLikeTypeTraits<PtrTy>; |
190 | |
191 | public: |
192 | ActionResult(bool Invalid = false) |
193 | : PtrWithInvalid(static_cast<uintptr_t>(Invalid)) {} |
194 | |
195 | ActionResult(PtrTy V) { |
196 | void *VP = PtrTraits::getAsVoidPointer(V); |
197 | PtrWithInvalid = reinterpret_cast<uintptr_t>(VP); |
198 | assert((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer")(static_cast <bool> ((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer") ? void (0) : __assert_fail ("(PtrWithInvalid & 0x01) == 0 && \"Badly aligned pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/Ownership.h" , 198, __extension__ __PRETTY_FUNCTION__)); |
199 | } |
200 | |
201 | ActionResult(const DiagnosticBuilder &) : PtrWithInvalid(0x01) {} |
202 | |
203 | // These two overloads prevent void* -> bool conversions. |
204 | ActionResult(const void *) = delete; |
205 | ActionResult(volatile void *) = delete; |
206 | |
207 | bool isInvalid() const { return PtrWithInvalid & 0x01; } |
208 | bool isUsable() const { return PtrWithInvalid > 0x01; } |
209 | bool isUnset() const { return PtrWithInvalid == 0; } |
210 | |
211 | PtrTy get() const { |
212 | void *VP = reinterpret_cast<void *>(PtrWithInvalid & ~0x01); |
213 | return PtrTraits::getFromVoidPointer(VP); |
214 | } |
215 | |
216 | template <typename T> T *getAs() { return static_cast<T*>(get()); } |
217 | |
218 | void set(PtrTy V) { |
219 | void *VP = PtrTraits::getAsVoidPointer(V); |
220 | PtrWithInvalid = reinterpret_cast<uintptr_t>(VP); |
221 | assert((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer")(static_cast <bool> ((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer") ? void (0) : __assert_fail ("(PtrWithInvalid & 0x01) == 0 && \"Badly aligned pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/Ownership.h" , 221, __extension__ __PRETTY_FUNCTION__)); |
222 | } |
223 | |
224 | const ActionResult &operator=(PtrTy RHS) { |
225 | void *VP = PtrTraits::getAsVoidPointer(RHS); |
226 | PtrWithInvalid = reinterpret_cast<uintptr_t>(VP); |
227 | assert((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer")(static_cast <bool> ((PtrWithInvalid & 0x01) == 0 && "Badly aligned pointer") ? void (0) : __assert_fail ("(PtrWithInvalid & 0x01) == 0 && \"Badly aligned pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/Ownership.h" , 227, __extension__ __PRETTY_FUNCTION__)); |
228 | return *this; |
229 | } |
230 | |
231 | // For types where we can fit a flag in with the pointer, provide |
232 | // conversions to/from pointer type. |
233 | static ActionResult getFromOpaquePointer(void *P) { |
234 | ActionResult Result; |
235 | Result.PtrWithInvalid = (uintptr_t)P; |
236 | return Result; |
237 | } |
238 | void *getAsOpaquePointer() const { return (void*)PtrWithInvalid; } |
239 | }; |
240 | |
241 | /// An opaque type for threading parsed type information through the |
242 | /// parser. |
243 | using ParsedType = OpaquePtr<QualType>; |
244 | using UnionParsedType = UnionOpaquePtr<QualType>; |
245 | |
246 | // We can re-use the low bit of expression, statement, base, and |
247 | // member-initializer pointers for the "invalid" flag of |
248 | // ActionResult. |
249 | template<> struct IsResultPtrLowBitFree<Expr*> { |
250 | static const bool value = true; |
251 | }; |
252 | template<> struct IsResultPtrLowBitFree<Stmt*> { |
253 | static const bool value = true; |
254 | }; |
255 | template<> struct IsResultPtrLowBitFree<CXXBaseSpecifier*> { |
256 | static const bool value = true; |
257 | }; |
258 | template<> struct IsResultPtrLowBitFree<CXXCtorInitializer*> { |
259 | static const bool value = true; |
260 | }; |
261 | |
262 | using ExprResult = ActionResult<Expr *>; |
263 | using StmtResult = ActionResult<Stmt *>; |
264 | using TypeResult = ActionResult<ParsedType>; |
265 | using BaseResult = ActionResult<CXXBaseSpecifier *>; |
266 | using MemInitResult = ActionResult<CXXCtorInitializer *>; |
267 | |
268 | using DeclResult = ActionResult<Decl *>; |
269 | using ParsedTemplateTy = OpaquePtr<TemplateName>; |
270 | using UnionParsedTemplateTy = UnionOpaquePtr<TemplateName>; |
271 | |
272 | using MultiExprArg = MutableArrayRef<Expr *>; |
273 | using MultiStmtArg = MutableArrayRef<Stmt *>; |
274 | using ASTTemplateArgsPtr = MutableArrayRef<ParsedTemplateArgument>; |
275 | using MultiTypeArg = MutableArrayRef<ParsedType>; |
276 | using MultiTemplateParamsArg = MutableArrayRef<TemplateParameterList *>; |
277 | |
278 | inline ExprResult ExprError() { return ExprResult(true); } |
279 | inline StmtResult StmtError() { return StmtResult(true); } |
280 | inline TypeResult TypeError() { return TypeResult(true); } |
281 | |
282 | inline ExprResult ExprError(const StreamingDiagnostic &) { |
283 | return ExprError(); |
284 | } |
285 | inline StmtResult StmtError(const StreamingDiagnostic &) { |
286 | return StmtError(); |
287 | } |
288 | |
289 | inline ExprResult ExprEmpty() { return ExprResult(false); } |
290 | inline StmtResult StmtEmpty() { return StmtResult(false); } |
291 | |
292 | inline Expr *AssertSuccess(ExprResult R) { |
293 | assert(!R.isInvalid() && "operation was asserted to never fail!")(static_cast <bool> (!R.isInvalid() && "operation was asserted to never fail!" ) ? void (0) : __assert_fail ("!R.isInvalid() && \"operation was asserted to never fail!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/Ownership.h" , 293, __extension__ __PRETTY_FUNCTION__)); |
294 | return R.get(); |
295 | } |
296 | |
297 | inline Stmt *AssertSuccess(StmtResult R) { |
298 | assert(!R.isInvalid() && "operation was asserted to never fail!")(static_cast <bool> (!R.isInvalid() && "operation was asserted to never fail!" ) ? void (0) : __assert_fail ("!R.isInvalid() && \"operation was asserted to never fail!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/Ownership.h" , 298, __extension__ __PRETTY_FUNCTION__)); |
299 | return R.get(); |
300 | } |
301 | |
302 | } // namespace clang |
303 | |
304 | #endif // LLVM_CLANG_SEMA_OWNERSHIP_H |
1 | //===--- DeclSpec.h - Parsed declaration specifiers -------------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | /// |
9 | /// \file |
10 | /// This file defines the classes used to store parsed information about |
11 | /// declaration-specifiers and declarators. |
12 | /// |
13 | /// \verbatim |
14 | /// static const int volatile x, *y, *(*(*z)[10])(const void *x); |
15 | /// ------------------------- - -- --------------------------- |
16 | /// declaration-specifiers \ | / |
17 | /// declarators |
18 | /// \endverbatim |
19 | /// |
20 | //===----------------------------------------------------------------------===// |
21 | |
22 | #ifndef LLVM_CLANG_SEMA_DECLSPEC_H |
23 | #define LLVM_CLANG_SEMA_DECLSPEC_H |
24 | |
25 | #include "clang/AST/DeclCXX.h" |
26 | #include "clang/AST/DeclObjCCommon.h" |
27 | #include "clang/AST/NestedNameSpecifier.h" |
28 | #include "clang/Basic/ExceptionSpecificationType.h" |
29 | #include "clang/Basic/Lambda.h" |
30 | #include "clang/Basic/OperatorKinds.h" |
31 | #include "clang/Basic/Specifiers.h" |
32 | #include "clang/Lex/Token.h" |
33 | #include "clang/Sema/Ownership.h" |
34 | #include "clang/Sema/ParsedAttr.h" |
35 | #include "llvm/ADT/SmallVector.h" |
36 | #include "llvm/Support/Compiler.h" |
37 | #include "llvm/Support/ErrorHandling.h" |
38 | |
39 | namespace clang { |
40 | class ASTContext; |
41 | class CXXRecordDecl; |
42 | class TypeLoc; |
43 | class LangOptions; |
44 | class IdentifierInfo; |
45 | class NamespaceAliasDecl; |
46 | class NamespaceDecl; |
47 | class ObjCDeclSpec; |
48 | class Sema; |
49 | class Declarator; |
50 | struct TemplateIdAnnotation; |
51 | |
52 | /// Represents a C++ nested-name-specifier or a global scope specifier. |
53 | /// |
54 | /// These can be in 3 states: |
55 | /// 1) Not present, identified by isEmpty() |
56 | /// 2) Present, identified by isNotEmpty() |
57 | /// 2.a) Valid, identified by isValid() |
58 | /// 2.b) Invalid, identified by isInvalid(). |
59 | /// |
60 | /// isSet() is deprecated because it mostly corresponded to "valid" but was |
61 | /// often used as if it meant "present". |
62 | /// |
63 | /// The actual scope is described by getScopeRep(). |
64 | class CXXScopeSpec { |
65 | SourceRange Range; |
66 | NestedNameSpecifierLocBuilder Builder; |
67 | |
68 | public: |
69 | SourceRange getRange() const { return Range; } |
70 | void setRange(SourceRange R) { Range = R; } |
71 | void setBeginLoc(SourceLocation Loc) { Range.setBegin(Loc); } |
72 | void setEndLoc(SourceLocation Loc) { Range.setEnd(Loc); } |
73 | SourceLocation getBeginLoc() const { return Range.getBegin(); } |
74 | SourceLocation getEndLoc() const { return Range.getEnd(); } |
75 | |
76 | /// Retrieve the representation of the nested-name-specifier. |
77 | NestedNameSpecifier *getScopeRep() const { |
78 | return Builder.getRepresentation(); |
79 | } |
80 | |
81 | /// Extend the current nested-name-specifier by another |
82 | /// nested-name-specifier component of the form 'type::'. |
83 | /// |
84 | /// \param Context The AST context in which this nested-name-specifier |
85 | /// resides. |
86 | /// |
87 | /// \param TemplateKWLoc The location of the 'template' keyword, if present. |
88 | /// |
89 | /// \param TL The TypeLoc that describes the type preceding the '::'. |
90 | /// |
91 | /// \param ColonColonLoc The location of the trailing '::'. |
92 | void Extend(ASTContext &Context, SourceLocation TemplateKWLoc, TypeLoc TL, |
93 | SourceLocation ColonColonLoc); |
94 | |
95 | /// Extend the current nested-name-specifier by another |
96 | /// nested-name-specifier component of the form 'identifier::'. |
97 | /// |
98 | /// \param Context The AST context in which this nested-name-specifier |
99 | /// resides. |
100 | /// |
101 | /// \param Identifier The identifier. |
102 | /// |
103 | /// \param IdentifierLoc The location of the identifier. |
104 | /// |
105 | /// \param ColonColonLoc The location of the trailing '::'. |
106 | void Extend(ASTContext &Context, IdentifierInfo *Identifier, |
107 | SourceLocation IdentifierLoc, SourceLocation ColonColonLoc); |
108 | |
109 | /// Extend the current nested-name-specifier by another |
110 | /// nested-name-specifier component of the form 'namespace::'. |
111 | /// |
112 | /// \param Context The AST context in which this nested-name-specifier |
113 | /// resides. |
114 | /// |
115 | /// \param Namespace The namespace. |
116 | /// |
117 | /// \param NamespaceLoc The location of the namespace name. |
118 | /// |
119 | /// \param ColonColonLoc The location of the trailing '::'. |
120 | void Extend(ASTContext &Context, NamespaceDecl *Namespace, |
121 | SourceLocation NamespaceLoc, SourceLocation ColonColonLoc); |
122 | |
123 | /// Extend the current nested-name-specifier by another |
124 | /// nested-name-specifier component of the form 'namespace-alias::'. |
125 | /// |
126 | /// \param Context The AST context in which this nested-name-specifier |
127 | /// resides. |
128 | /// |
129 | /// \param Alias The namespace alias. |
130 | /// |
131 | /// \param AliasLoc The location of the namespace alias |
132 | /// name. |
133 | /// |
134 | /// \param ColonColonLoc The location of the trailing '::'. |
135 | void Extend(ASTContext &Context, NamespaceAliasDecl *Alias, |
136 | SourceLocation AliasLoc, SourceLocation ColonColonLoc); |
137 | |
138 | /// Turn this (empty) nested-name-specifier into the global |
139 | /// nested-name-specifier '::'. |
140 | void MakeGlobal(ASTContext &Context, SourceLocation ColonColonLoc); |
141 | |
142 | /// Turns this (empty) nested-name-specifier into '__super' |
143 | /// nested-name-specifier. |
144 | /// |
145 | /// \param Context The AST context in which this nested-name-specifier |
146 | /// resides. |
147 | /// |
148 | /// \param RD The declaration of the class in which nested-name-specifier |
149 | /// appeared. |
150 | /// |
151 | /// \param SuperLoc The location of the '__super' keyword. |
152 | /// name. |
153 | /// |
154 | /// \param ColonColonLoc The location of the trailing '::'. |
155 | void MakeSuper(ASTContext &Context, CXXRecordDecl *RD, |
156 | SourceLocation SuperLoc, SourceLocation ColonColonLoc); |
157 | |
158 | /// Make a new nested-name-specifier from incomplete source-location |
159 | /// information. |
160 | /// |
161 | /// FIXME: This routine should be used very, very rarely, in cases where we |
162 | /// need to synthesize a nested-name-specifier. Most code should instead use |
163 | /// \c Adopt() with a proper \c NestedNameSpecifierLoc. |
164 | void MakeTrivial(ASTContext &Context, NestedNameSpecifier *Qualifier, |
165 | SourceRange R); |
166 | |
167 | /// Adopt an existing nested-name-specifier (with source-range |
168 | /// information). |
169 | void Adopt(NestedNameSpecifierLoc Other); |
170 | |
171 | /// Retrieve a nested-name-specifier with location information, copied |
172 | /// into the given AST context. |
173 | /// |
174 | /// \param Context The context into which this nested-name-specifier will be |
175 | /// copied. |
176 | NestedNameSpecifierLoc getWithLocInContext(ASTContext &Context) const; |
177 | |
178 | /// Retrieve the location of the name in the last qualifier |
179 | /// in this nested name specifier. |
180 | /// |
181 | /// For example, the location of \c bar |
182 | /// in |
183 | /// \verbatim |
184 | /// \::foo::bar<0>:: |
185 | /// ^~~ |
186 | /// \endverbatim |
187 | SourceLocation getLastQualifierNameLoc() const; |
188 | |
189 | /// No scope specifier. |
190 | bool isEmpty() const { return Range.isInvalid() && getScopeRep() == nullptr; } |
191 | /// A scope specifier is present, but may be valid or invalid. |
192 | bool isNotEmpty() const { return !isEmpty(); } |
193 | |
194 | /// An error occurred during parsing of the scope specifier. |
195 | bool isInvalid() const { return Range.isValid() && getScopeRep() == nullptr; } |
196 | /// A scope specifier is present, and it refers to a real scope. |
197 | bool isValid() const { return getScopeRep() != nullptr; } |
198 | |
199 | /// Indicate that this nested-name-specifier is invalid. |
200 | void SetInvalid(SourceRange R) { |
201 | assert(R.isValid() && "Must have a valid source range")(static_cast <bool> (R.isValid() && "Must have a valid source range" ) ? void (0) : __assert_fail ("R.isValid() && \"Must have a valid source range\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 201, __extension__ __PRETTY_FUNCTION__)); |
202 | if (Range.getBegin().isInvalid()) |
203 | Range.setBegin(R.getBegin()); |
204 | Range.setEnd(R.getEnd()); |
205 | Builder.Clear(); |
206 | } |
207 | |
208 | /// Deprecated. Some call sites intend isNotEmpty() while others intend |
209 | /// isValid(). |
210 | bool isSet() const { return getScopeRep() != nullptr; } |
211 | |
212 | void clear() { |
213 | Range = SourceRange(); |
214 | Builder.Clear(); |
215 | } |
216 | |
217 | /// Retrieve the data associated with the source-location information. |
218 | char *location_data() const { return Builder.getBuffer().first; } |
219 | |
220 | /// Retrieve the size of the data associated with source-location |
221 | /// information. |
222 | unsigned location_size() const { return Builder.getBuffer().second; } |
223 | }; |
224 | |
225 | /// Captures information about "declaration specifiers". |
226 | /// |
227 | /// "Declaration specifiers" encompasses storage-class-specifiers, |
228 | /// type-specifiers, type-qualifiers, and function-specifiers. |
229 | class DeclSpec { |
230 | public: |
231 | /// storage-class-specifier |
232 | /// \note The order of these enumerators is important for diagnostics. |
233 | enum SCS { |
234 | SCS_unspecified = 0, |
235 | SCS_typedef, |
236 | SCS_extern, |
237 | SCS_static, |
238 | SCS_auto, |
239 | SCS_register, |
240 | SCS_private_extern, |
241 | SCS_mutable |
242 | }; |
243 | |
244 | // Import thread storage class specifier enumeration and constants. |
245 | // These can be combined with SCS_extern and SCS_static. |
246 | typedef ThreadStorageClassSpecifier TSCS; |
247 | static const TSCS TSCS_unspecified = clang::TSCS_unspecified; |
248 | static const TSCS TSCS___thread = clang::TSCS___thread; |
249 | static const TSCS TSCS_thread_local = clang::TSCS_thread_local; |
250 | static const TSCS TSCS__Thread_local = clang::TSCS__Thread_local; |
251 | |
252 | enum TSC { |
253 | TSC_unspecified, |
254 | TSC_imaginary, |
255 | TSC_complex |
256 | }; |
257 | |
258 | // Import type specifier type enumeration and constants. |
259 | typedef TypeSpecifierType TST; |
260 | static const TST TST_unspecified = clang::TST_unspecified; |
261 | static const TST TST_void = clang::TST_void; |
262 | static const TST TST_char = clang::TST_char; |
263 | static const TST TST_wchar = clang::TST_wchar; |
264 | static const TST TST_char8 = clang::TST_char8; |
265 | static const TST TST_char16 = clang::TST_char16; |
266 | static const TST TST_char32 = clang::TST_char32; |
267 | static const TST TST_int = clang::TST_int; |
268 | static const TST TST_int128 = clang::TST_int128; |
269 | static const TST TST_extint = clang::TST_extint; |
270 | static const TST TST_half = clang::TST_half; |
271 | static const TST TST_BFloat16 = clang::TST_BFloat16; |
272 | static const TST TST_float = clang::TST_float; |
273 | static const TST TST_double = clang::TST_double; |
274 | static const TST TST_float16 = clang::TST_Float16; |
275 | static const TST TST_accum = clang::TST_Accum; |
276 | static const TST TST_fract = clang::TST_Fract; |
277 | static const TST TST_float128 = clang::TST_float128; |
278 | static const TST TST_bool = clang::TST_bool; |
279 | static const TST TST_decimal32 = clang::TST_decimal32; |
280 | static const TST TST_decimal64 = clang::TST_decimal64; |
281 | static const TST TST_decimal128 = clang::TST_decimal128; |
282 | static const TST TST_enum = clang::TST_enum; |
283 | static const TST TST_union = clang::TST_union; |
284 | static const TST TST_struct = clang::TST_struct; |
285 | static const TST TST_interface = clang::TST_interface; |
286 | static const TST TST_class = clang::TST_class; |
287 | static const TST TST_typename = clang::TST_typename; |
288 | static const TST TST_typeofType = clang::TST_typeofType; |
289 | static const TST TST_typeofExpr = clang::TST_typeofExpr; |
290 | static const TST TST_decltype = clang::TST_decltype; |
291 | static const TST TST_decltype_auto = clang::TST_decltype_auto; |
292 | static const TST TST_underlyingType = clang::TST_underlyingType; |
293 | static const TST TST_auto = clang::TST_auto; |
294 | static const TST TST_auto_type = clang::TST_auto_type; |
295 | static const TST TST_unknown_anytype = clang::TST_unknown_anytype; |
296 | static const TST TST_atomic = clang::TST_atomic; |
297 | #define GENERIC_IMAGE_TYPE(ImgType, Id) \ |
298 | static const TST TST_##ImgType##_t = clang::TST_##ImgType##_t; |
299 | #include "clang/Basic/OpenCLImageTypes.def" |
300 | static const TST TST_error = clang::TST_error; |
301 | |
302 | // type-qualifiers |
303 | enum TQ { // NOTE: These flags must be kept in sync with Qualifiers::TQ. |
304 | TQ_unspecified = 0, |
305 | TQ_const = 1, |
306 | TQ_restrict = 2, |
307 | TQ_volatile = 4, |
308 | TQ_unaligned = 8, |
309 | // This has no corresponding Qualifiers::TQ value, because it's not treated |
310 | // as a qualifier in our type system. |
311 | TQ_atomic = 16 |
312 | }; |
313 | |
314 | /// ParsedSpecifiers - Flags to query which specifiers were applied. This is |
315 | /// returned by getParsedSpecifiers. |
316 | enum ParsedSpecifiers { |
317 | PQ_None = 0, |
318 | PQ_StorageClassSpecifier = 1, |
319 | PQ_TypeSpecifier = 2, |
320 | PQ_TypeQualifier = 4, |
321 | PQ_FunctionSpecifier = 8 |
322 | // FIXME: Attributes should be included here. |
323 | }; |
324 | |
325 | private: |
326 | // storage-class-specifier |
327 | /*SCS*/unsigned StorageClassSpec : 3; |
328 | /*TSCS*/unsigned ThreadStorageClassSpec : 2; |
329 | unsigned SCS_extern_in_linkage_spec : 1; |
330 | |
331 | // type-specifier |
332 | /*TypeSpecifierWidth*/ unsigned TypeSpecWidth : 2; |
333 | /*TSC*/unsigned TypeSpecComplex : 2; |
334 | /*TSS*/unsigned TypeSpecSign : 2; |
335 | /*TST*/unsigned TypeSpecType : 6; |
336 | unsigned TypeAltiVecVector : 1; |
337 | unsigned TypeAltiVecPixel : 1; |
338 | unsigned TypeAltiVecBool : 1; |
339 | unsigned TypeSpecOwned : 1; |
340 | unsigned TypeSpecPipe : 1; |
341 | unsigned TypeSpecSat : 1; |
342 | unsigned ConstrainedAuto : 1; |
343 | |
344 | // type-qualifiers |
345 | unsigned TypeQualifiers : 5; // Bitwise OR of TQ. |
346 | |
347 | // function-specifier |
348 | unsigned FS_inline_specified : 1; |
349 | unsigned FS_forceinline_specified: 1; |
350 | unsigned FS_virtual_specified : 1; |
351 | unsigned FS_noreturn_specified : 1; |
352 | |
353 | // friend-specifier |
354 | unsigned Friend_specified : 1; |
355 | |
356 | // constexpr-specifier |
357 | unsigned ConstexprSpecifier : 2; |
358 | |
359 | union { |
360 | UnionParsedType TypeRep; |
361 | Decl *DeclRep; |
362 | Expr *ExprRep; |
363 | TemplateIdAnnotation *TemplateIdRep; |
364 | }; |
365 | |
366 | /// ExplicitSpecifier - Store information about explicit spicifer. |
367 | ExplicitSpecifier FS_explicit_specifier; |
368 | |
369 | // attributes. |
370 | ParsedAttributes Attrs; |
371 | |
372 | // Scope specifier for the type spec, if applicable. |
373 | CXXScopeSpec TypeScope; |
374 | |
375 | // SourceLocation info. These are null if the item wasn't specified or if |
376 | // the setting was synthesized. |
377 | SourceRange Range; |
378 | |
379 | SourceLocation StorageClassSpecLoc, ThreadStorageClassSpecLoc; |
380 | SourceRange TSWRange; |
381 | SourceLocation TSCLoc, TSSLoc, TSTLoc, AltiVecLoc, TSSatLoc; |
382 | /// TSTNameLoc - If TypeSpecType is any of class, enum, struct, union, |
383 | /// typename, then this is the location of the named type (if present); |
384 | /// otherwise, it is the same as TSTLoc. Hence, the pair TSTLoc and |
385 | /// TSTNameLoc provides source range info for tag types. |
386 | SourceLocation TSTNameLoc; |
387 | SourceRange TypeofParensRange; |
388 | SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc, TQ_atomicLoc, |
389 | TQ_unalignedLoc; |
390 | SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc, FS_noreturnLoc; |
391 | SourceLocation FS_explicitCloseParenLoc; |
392 | SourceLocation FS_forceinlineLoc; |
393 | SourceLocation FriendLoc, ModulePrivateLoc, ConstexprLoc; |
394 | SourceLocation TQ_pipeLoc; |
395 | |
396 | WrittenBuiltinSpecs writtenBS; |
397 | void SaveWrittenBuiltinSpecs(); |
398 | |
399 | ObjCDeclSpec *ObjCQualifiers; |
400 | |
401 | static bool isTypeRep(TST T) { |
402 | return (T == TST_typename || T == TST_typeofType || |
403 | T == TST_underlyingType || T == TST_atomic); |
404 | } |
405 | static bool isExprRep(TST T) { |
406 | return (T == TST_typeofExpr || T == TST_decltype || T == TST_extint); |
407 | } |
408 | static bool isTemplateIdRep(TST T) { |
409 | return (T == TST_auto || T == TST_decltype_auto); |
410 | } |
411 | |
412 | DeclSpec(const DeclSpec &) = delete; |
413 | void operator=(const DeclSpec &) = delete; |
414 | public: |
415 | static bool isDeclRep(TST T) { |
416 | return (T == TST_enum || T == TST_struct || |
417 | T == TST_interface || T == TST_union || |
418 | T == TST_class); |
419 | } |
420 | |
421 | DeclSpec(AttributeFactory &attrFactory) |
422 | : StorageClassSpec(SCS_unspecified), |
423 | ThreadStorageClassSpec(TSCS_unspecified), |
424 | SCS_extern_in_linkage_spec(false), |
425 | TypeSpecWidth(static_cast<unsigned>(TypeSpecifierWidth::Unspecified)), |
426 | TypeSpecComplex(TSC_unspecified), |
427 | TypeSpecSign(static_cast<unsigned>(TypeSpecifierSign::Unspecified)), |
428 | TypeSpecType(TST_unspecified), TypeAltiVecVector(false), |
429 | TypeAltiVecPixel(false), TypeAltiVecBool(false), TypeSpecOwned(false), |
430 | TypeSpecPipe(false), TypeSpecSat(false), ConstrainedAuto(false), |
431 | TypeQualifiers(TQ_unspecified), FS_inline_specified(false), |
432 | FS_forceinline_specified(false), FS_virtual_specified(false), |
433 | FS_noreturn_specified(false), Friend_specified(false), |
434 | ConstexprSpecifier( |
435 | static_cast<unsigned>(ConstexprSpecKind::Unspecified)), |
436 | FS_explicit_specifier(), Attrs(attrFactory), writtenBS(), |
437 | ObjCQualifiers(nullptr) {} |
438 | |
439 | // storage-class-specifier |
440 | SCS getStorageClassSpec() const { return (SCS)StorageClassSpec; } |
441 | TSCS getThreadStorageClassSpec() const { |
442 | return (TSCS)ThreadStorageClassSpec; |
443 | } |
444 | bool isExternInLinkageSpec() const { return SCS_extern_in_linkage_spec; } |
445 | void setExternInLinkageSpec(bool Value) { |
446 | SCS_extern_in_linkage_spec = Value; |
447 | } |
448 | |
449 | SourceLocation getStorageClassSpecLoc() const { return StorageClassSpecLoc; } |
450 | SourceLocation getThreadStorageClassSpecLoc() const { |
451 | return ThreadStorageClassSpecLoc; |
452 | } |
453 | |
454 | void ClearStorageClassSpecs() { |
455 | StorageClassSpec = DeclSpec::SCS_unspecified; |
456 | ThreadStorageClassSpec = DeclSpec::TSCS_unspecified; |
457 | SCS_extern_in_linkage_spec = false; |
458 | StorageClassSpecLoc = SourceLocation(); |
459 | ThreadStorageClassSpecLoc = SourceLocation(); |
460 | } |
461 | |
462 | void ClearTypeSpecType() { |
463 | TypeSpecType = DeclSpec::TST_unspecified; |
464 | TypeSpecOwned = false; |
465 | TSTLoc = SourceLocation(); |
466 | } |
467 | |
468 | // type-specifier |
469 | TypeSpecifierWidth getTypeSpecWidth() const { |
470 | return static_cast<TypeSpecifierWidth>(TypeSpecWidth); |
471 | } |
472 | TSC getTypeSpecComplex() const { return (TSC)TypeSpecComplex; } |
473 | TypeSpecifierSign getTypeSpecSign() const { |
474 | return static_cast<TypeSpecifierSign>(TypeSpecSign); |
475 | } |
476 | TST getTypeSpecType() const { return (TST)TypeSpecType; } |
477 | bool isTypeAltiVecVector() const { return TypeAltiVecVector; } |
478 | bool isTypeAltiVecPixel() const { return TypeAltiVecPixel; } |
479 | bool isTypeAltiVecBool() const { return TypeAltiVecBool; } |
480 | bool isTypeSpecOwned() const { return TypeSpecOwned; } |
481 | bool isTypeRep() const { return isTypeRep((TST) TypeSpecType); } |
482 | bool isTypeSpecPipe() const { return TypeSpecPipe; } |
483 | bool isTypeSpecSat() const { return TypeSpecSat; } |
484 | bool isConstrainedAuto() const { return ConstrainedAuto; } |
485 | |
486 | ParsedType getRepAsType() const { |
487 | assert(isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type")(static_cast <bool> (isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type") ? void (0) : __assert_fail ("isTypeRep((TST) TypeSpecType) && \"DeclSpec does not store a type\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 487, __extension__ __PRETTY_FUNCTION__)); |
488 | return TypeRep; |
489 | } |
490 | Decl *getRepAsDecl() const { |
491 | assert(isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl")(static_cast <bool> (isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl") ? void (0) : __assert_fail ("isDeclRep((TST) TypeSpecType) && \"DeclSpec does not store a decl\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 491, __extension__ __PRETTY_FUNCTION__)); |
492 | return DeclRep; |
493 | } |
494 | Expr *getRepAsExpr() const { |
495 | assert(isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr")(static_cast <bool> (isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr") ? void (0) : __assert_fail ("isExprRep((TST) TypeSpecType) && \"DeclSpec does not store an expr\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 495, __extension__ __PRETTY_FUNCTION__)); |
496 | return ExprRep; |
497 | } |
498 | TemplateIdAnnotation *getRepAsTemplateId() const { |
499 | assert(isTemplateIdRep((TST) TypeSpecType) &&(static_cast <bool> (isTemplateIdRep((TST) TypeSpecType ) && "DeclSpec does not store a template id") ? void ( 0) : __assert_fail ("isTemplateIdRep((TST) TypeSpecType) && \"DeclSpec does not store a template id\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 500, __extension__ __PRETTY_FUNCTION__)) |
500 | "DeclSpec does not store a template id")(static_cast <bool> (isTemplateIdRep((TST) TypeSpecType ) && "DeclSpec does not store a template id") ? void ( 0) : __assert_fail ("isTemplateIdRep((TST) TypeSpecType) && \"DeclSpec does not store a template id\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 500, __extension__ __PRETTY_FUNCTION__)); |
501 | return TemplateIdRep; |
502 | } |
503 | CXXScopeSpec &getTypeSpecScope() { return TypeScope; } |
504 | const CXXScopeSpec &getTypeSpecScope() const { return TypeScope; } |
505 | |
506 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
507 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
508 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
509 | |
510 | SourceLocation getTypeSpecWidthLoc() const { return TSWRange.getBegin(); } |
511 | SourceRange getTypeSpecWidthRange() const { return TSWRange; } |
512 | SourceLocation getTypeSpecComplexLoc() const { return TSCLoc; } |
513 | SourceLocation getTypeSpecSignLoc() const { return TSSLoc; } |
514 | SourceLocation getTypeSpecTypeLoc() const { return TSTLoc; } |
515 | SourceLocation getAltiVecLoc() const { return AltiVecLoc; } |
516 | SourceLocation getTypeSpecSatLoc() const { return TSSatLoc; } |
517 | |
518 | SourceLocation getTypeSpecTypeNameLoc() const { |
519 | assert(isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename)(static_cast <bool> (isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename) ? void (0) : __assert_fail ("isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 519, __extension__ __PRETTY_FUNCTION__)); |
520 | return TSTNameLoc; |
521 | } |
522 | |
523 | SourceRange getTypeofParensRange() const { return TypeofParensRange; } |
524 | void setTypeofParensRange(SourceRange range) { TypeofParensRange = range; } |
525 | |
526 | bool hasAutoTypeSpec() const { |
527 | return (TypeSpecType == TST_auto || TypeSpecType == TST_auto_type || |
528 | TypeSpecType == TST_decltype_auto); |
529 | } |
530 | |
531 | bool hasTagDefinition() const; |
532 | |
533 | /// Turn a type-specifier-type into a string like "_Bool" or "union". |
534 | static const char *getSpecifierName(DeclSpec::TST T, |
535 | const PrintingPolicy &Policy); |
536 | static const char *getSpecifierName(DeclSpec::TQ Q); |
537 | static const char *getSpecifierName(TypeSpecifierSign S); |
538 | static const char *getSpecifierName(DeclSpec::TSC C); |
539 | static const char *getSpecifierName(TypeSpecifierWidth W); |
540 | static const char *getSpecifierName(DeclSpec::SCS S); |
541 | static const char *getSpecifierName(DeclSpec::TSCS S); |
542 | static const char *getSpecifierName(ConstexprSpecKind C); |
543 | |
544 | // type-qualifiers |
545 | |
546 | /// getTypeQualifiers - Return a set of TQs. |
547 | unsigned getTypeQualifiers() const { return TypeQualifiers; } |
548 | SourceLocation getConstSpecLoc() const { return TQ_constLoc; } |
549 | SourceLocation getRestrictSpecLoc() const { return TQ_restrictLoc; } |
550 | SourceLocation getVolatileSpecLoc() const { return TQ_volatileLoc; } |
551 | SourceLocation getAtomicSpecLoc() const { return TQ_atomicLoc; } |
552 | SourceLocation getUnalignedSpecLoc() const { return TQ_unalignedLoc; } |
553 | SourceLocation getPipeLoc() const { return TQ_pipeLoc; } |
554 | |
555 | /// Clear out all of the type qualifiers. |
556 | void ClearTypeQualifiers() { |
557 | TypeQualifiers = 0; |
558 | TQ_constLoc = SourceLocation(); |
559 | TQ_restrictLoc = SourceLocation(); |
560 | TQ_volatileLoc = SourceLocation(); |
561 | TQ_atomicLoc = SourceLocation(); |
562 | TQ_unalignedLoc = SourceLocation(); |
563 | TQ_pipeLoc = SourceLocation(); |
564 | } |
565 | |
566 | // function-specifier |
567 | bool isInlineSpecified() const { |
568 | return FS_inline_specified | FS_forceinline_specified; |
569 | } |
570 | SourceLocation getInlineSpecLoc() const { |
571 | return FS_inline_specified ? FS_inlineLoc : FS_forceinlineLoc; |
572 | } |
573 | |
574 | ExplicitSpecifier getExplicitSpecifier() const { |
575 | return FS_explicit_specifier; |
576 | } |
577 | |
578 | bool isVirtualSpecified() const { return FS_virtual_specified; } |
579 | SourceLocation getVirtualSpecLoc() const { return FS_virtualLoc; } |
580 | |
581 | bool hasExplicitSpecifier() const { |
582 | return FS_explicit_specifier.isSpecified(); |
583 | } |
584 | SourceLocation getExplicitSpecLoc() const { return FS_explicitLoc; } |
585 | SourceRange getExplicitSpecRange() const { |
586 | return FS_explicit_specifier.getExpr() |
587 | ? SourceRange(FS_explicitLoc, FS_explicitCloseParenLoc) |
588 | : SourceRange(FS_explicitLoc); |
589 | } |
590 | |
591 | bool isNoreturnSpecified() const { return FS_noreturn_specified; } |
592 | SourceLocation getNoreturnSpecLoc() const { return FS_noreturnLoc; } |
593 | |
594 | void ClearFunctionSpecs() { |
595 | FS_inline_specified = false; |
596 | FS_inlineLoc = SourceLocation(); |
597 | FS_forceinline_specified = false; |
598 | FS_forceinlineLoc = SourceLocation(); |
599 | FS_virtual_specified = false; |
600 | FS_virtualLoc = SourceLocation(); |
601 | FS_explicit_specifier = ExplicitSpecifier(); |
602 | FS_explicitLoc = SourceLocation(); |
603 | FS_explicitCloseParenLoc = SourceLocation(); |
604 | FS_noreturn_specified = false; |
605 | FS_noreturnLoc = SourceLocation(); |
606 | } |
607 | |
608 | /// This method calls the passed in handler on each CVRU qual being |
609 | /// set. |
610 | /// Handle - a handler to be invoked. |
611 | void forEachCVRUQualifier( |
612 | llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle); |
613 | |
614 | /// This method calls the passed in handler on each qual being |
615 | /// set. |
616 | /// Handle - a handler to be invoked. |
617 | void forEachQualifier( |
618 | llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle); |
619 | |
620 | /// Return true if any type-specifier has been found. |
621 | bool hasTypeSpecifier() const { |
622 | return getTypeSpecType() != DeclSpec::TST_unspecified || |
623 | getTypeSpecWidth() != TypeSpecifierWidth::Unspecified || |
624 | getTypeSpecComplex() != DeclSpec::TSC_unspecified || |
625 | getTypeSpecSign() != TypeSpecifierSign::Unspecified; |
626 | } |
627 | |
628 | /// Return a bitmask of which flavors of specifiers this |
629 | /// DeclSpec includes. |
630 | unsigned getParsedSpecifiers() const; |
631 | |
632 | /// isEmpty - Return true if this declaration specifier is completely empty: |
633 | /// no tokens were parsed in the production of it. |
634 | bool isEmpty() const { |
635 | return getParsedSpecifiers() == DeclSpec::PQ_None; |
636 | } |
637 | |
638 | void SetRangeStart(SourceLocation Loc) { Range.setBegin(Loc); } |
639 | void SetRangeEnd(SourceLocation Loc) { Range.setEnd(Loc); } |
640 | |
641 | /// These methods set the specified attribute of the DeclSpec and |
642 | /// return false if there was no error. If an error occurs (for |
643 | /// example, if we tried to set "auto" on a spec with "extern" |
644 | /// already set), they return true and set PrevSpec and DiagID |
645 | /// such that |
646 | /// Diag(Loc, DiagID) << PrevSpec; |
647 | /// will yield a useful result. |
648 | /// |
649 | /// TODO: use a more general approach that still allows these |
650 | /// diagnostics to be ignored when desired. |
651 | bool SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc, |
652 | const char *&PrevSpec, unsigned &DiagID, |
653 | const PrintingPolicy &Policy); |
654 | bool SetStorageClassSpecThread(TSCS TSC, SourceLocation Loc, |
655 | const char *&PrevSpec, unsigned &DiagID); |
656 | bool SetTypeSpecWidth(TypeSpecifierWidth W, SourceLocation Loc, |
657 | const char *&PrevSpec, unsigned &DiagID, |
658 | const PrintingPolicy &Policy); |
659 | bool SetTypeSpecComplex(TSC C, SourceLocation Loc, const char *&PrevSpec, |
660 | unsigned &DiagID); |
661 | bool SetTypeSpecSign(TypeSpecifierSign S, SourceLocation Loc, |
662 | const char *&PrevSpec, unsigned &DiagID); |
663 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
664 | unsigned &DiagID, const PrintingPolicy &Policy); |
665 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
666 | unsigned &DiagID, ParsedType Rep, |
667 | const PrintingPolicy &Policy); |
668 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
669 | unsigned &DiagID, TypeResult Rep, |
670 | const PrintingPolicy &Policy) { |
671 | if (Rep.isInvalid()) |
672 | return SetTypeSpecError(); |
673 | return SetTypeSpecType(T, Loc, PrevSpec, DiagID, Rep.get(), Policy); |
674 | } |
675 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
676 | unsigned &DiagID, Decl *Rep, bool Owned, |
677 | const PrintingPolicy &Policy); |
678 | bool SetTypeSpecType(TST T, SourceLocation TagKwLoc, |
679 | SourceLocation TagNameLoc, const char *&PrevSpec, |
680 | unsigned &DiagID, ParsedType Rep, |
681 | const PrintingPolicy &Policy); |
682 | bool SetTypeSpecType(TST T, SourceLocation TagKwLoc, |
683 | SourceLocation TagNameLoc, const char *&PrevSpec, |
684 | unsigned &DiagID, Decl *Rep, bool Owned, |
685 | const PrintingPolicy &Policy); |
686 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
687 | unsigned &DiagID, TemplateIdAnnotation *Rep, |
688 | const PrintingPolicy &Policy); |
689 | |
690 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
691 | unsigned &DiagID, Expr *Rep, |
692 | const PrintingPolicy &policy); |
693 | bool SetTypeAltiVecVector(bool isAltiVecVector, SourceLocation Loc, |
694 | const char *&PrevSpec, unsigned &DiagID, |
695 | const PrintingPolicy &Policy); |
696 | bool SetTypeAltiVecPixel(bool isAltiVecPixel, SourceLocation Loc, |
697 | const char *&PrevSpec, unsigned &DiagID, |
698 | const PrintingPolicy &Policy); |
699 | bool SetTypeAltiVecBool(bool isAltiVecBool, SourceLocation Loc, |
700 | const char *&PrevSpec, unsigned &DiagID, |
701 | const PrintingPolicy &Policy); |
702 | bool SetTypePipe(bool isPipe, SourceLocation Loc, |
703 | const char *&PrevSpec, unsigned &DiagID, |
704 | const PrintingPolicy &Policy); |
705 | bool SetExtIntType(SourceLocation KWLoc, Expr *BitWidth, |
706 | const char *&PrevSpec, unsigned &DiagID, |
707 | const PrintingPolicy &Policy); |
708 | bool SetTypeSpecSat(SourceLocation Loc, const char *&PrevSpec, |
709 | unsigned &DiagID); |
710 | bool SetTypeSpecError(); |
711 | void UpdateDeclRep(Decl *Rep) { |
712 | assert(isDeclRep((TST) TypeSpecType))(static_cast <bool> (isDeclRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isDeclRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 712, __extension__ __PRETTY_FUNCTION__)); |
713 | DeclRep = Rep; |
714 | } |
715 | void UpdateTypeRep(ParsedType Rep) { |
716 | assert(isTypeRep((TST) TypeSpecType))(static_cast <bool> (isTypeRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isTypeRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 716, __extension__ __PRETTY_FUNCTION__)); |
717 | TypeRep = Rep; |
718 | } |
719 | void UpdateExprRep(Expr *Rep) { |
720 | assert(isExprRep((TST) TypeSpecType))(static_cast <bool> (isExprRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isExprRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 720, __extension__ __PRETTY_FUNCTION__)); |
721 | ExprRep = Rep; |
722 | } |
723 | |
724 | bool SetTypeQual(TQ T, SourceLocation Loc); |
725 | |
726 | bool SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec, |
727 | unsigned &DiagID, const LangOptions &Lang); |
728 | |
729 | bool setFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec, |
730 | unsigned &DiagID); |
731 | bool setFunctionSpecForceInline(SourceLocation Loc, const char *&PrevSpec, |
732 | unsigned &DiagID); |
733 | bool setFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec, |
734 | unsigned &DiagID); |
735 | bool setFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec, |
736 | unsigned &DiagID, ExplicitSpecifier ExplicitSpec, |
737 | SourceLocation CloseParenLoc); |
738 | bool setFunctionSpecNoreturn(SourceLocation Loc, const char *&PrevSpec, |
739 | unsigned &DiagID); |
740 | |
741 | bool SetFriendSpec(SourceLocation Loc, const char *&PrevSpec, |
742 | unsigned &DiagID); |
743 | bool setModulePrivateSpec(SourceLocation Loc, const char *&PrevSpec, |
744 | unsigned &DiagID); |
745 | bool SetConstexprSpec(ConstexprSpecKind ConstexprKind, SourceLocation Loc, |
746 | const char *&PrevSpec, unsigned &DiagID); |
747 | |
748 | bool isFriendSpecified() const { return Friend_specified; } |
749 | SourceLocation getFriendSpecLoc() const { return FriendLoc; } |
750 | |
751 | bool isModulePrivateSpecified() const { return ModulePrivateLoc.isValid(); } |
752 | SourceLocation getModulePrivateSpecLoc() const { return ModulePrivateLoc; } |
753 | |
754 | ConstexprSpecKind getConstexprSpecifier() const { |
755 | return ConstexprSpecKind(ConstexprSpecifier); |
756 | } |
757 | |
758 | SourceLocation getConstexprSpecLoc() const { return ConstexprLoc; } |
759 | bool hasConstexprSpecifier() const { |
760 | return getConstexprSpecifier() != ConstexprSpecKind::Unspecified; |
761 | } |
762 | |
763 | void ClearConstexprSpec() { |
764 | ConstexprSpecifier = static_cast<unsigned>(ConstexprSpecKind::Unspecified); |
765 | ConstexprLoc = SourceLocation(); |
766 | } |
767 | |
768 | AttributePool &getAttributePool() const { |
769 | return Attrs.getPool(); |
770 | } |
771 | |
772 | /// Concatenates two attribute lists. |
773 | /// |
774 | /// The GCC attribute syntax allows for the following: |
775 | /// |
776 | /// \code |
777 | /// short __attribute__(( unused, deprecated )) |
778 | /// int __attribute__(( may_alias, aligned(16) )) var; |
779 | /// \endcode |
780 | /// |
781 | /// This declares 4 attributes using 2 lists. The following syntax is |
782 | /// also allowed and equivalent to the previous declaration. |
783 | /// |
784 | /// \code |
785 | /// short __attribute__((unused)) __attribute__((deprecated)) |
786 | /// int __attribute__((may_alias)) __attribute__((aligned(16))) var; |
787 | /// \endcode |
788 | /// |
789 | void addAttributes(ParsedAttributesView &AL) { |
790 | Attrs.addAll(AL.begin(), AL.end()); |
791 | } |
792 | |
793 | bool hasAttributes() const { return !Attrs.empty(); } |
794 | |
795 | ParsedAttributes &getAttributes() { return Attrs; } |
796 | const ParsedAttributes &getAttributes() const { return Attrs; } |
797 | |
798 | void takeAttributesFrom(ParsedAttributes &attrs) { |
799 | Attrs.takeAllFrom(attrs); |
800 | } |
801 | |
802 | /// Finish - This does final analysis of the declspec, issuing diagnostics for |
803 | /// things like "_Imaginary" (lacking an FP type). After calling this method, |
804 | /// DeclSpec is guaranteed self-consistent, even if an error occurred. |
805 | void Finish(Sema &S, const PrintingPolicy &Policy); |
806 | |
807 | const WrittenBuiltinSpecs& getWrittenBuiltinSpecs() const { |
808 | return writtenBS; |
809 | } |
810 | |
811 | ObjCDeclSpec *getObjCQualifiers() const { return ObjCQualifiers; } |
812 | void setObjCQualifiers(ObjCDeclSpec *quals) { ObjCQualifiers = quals; } |
813 | |
814 | /// Checks if this DeclSpec can stand alone, without a Declarator. |
815 | /// |
816 | /// Only tag declspecs can stand alone. |
817 | bool isMissingDeclaratorOk(); |
818 | }; |
819 | |
820 | /// Captures information about "declaration specifiers" specific to |
821 | /// Objective-C. |
822 | class ObjCDeclSpec { |
823 | public: |
824 | /// ObjCDeclQualifier - Qualifier used on types in method |
825 | /// declarations. Not all combinations are sensible. Parameters |
826 | /// can be one of { in, out, inout } with one of { bycopy, byref }. |
827 | /// Returns can either be { oneway } or not. |
828 | /// |
829 | /// This should be kept in sync with Decl::ObjCDeclQualifier. |
830 | enum ObjCDeclQualifier { |
831 | DQ_None = 0x0, |
832 | DQ_In = 0x1, |
833 | DQ_Inout = 0x2, |
834 | DQ_Out = 0x4, |
835 | DQ_Bycopy = 0x8, |
836 | DQ_Byref = 0x10, |
837 | DQ_Oneway = 0x20, |
838 | DQ_CSNullability = 0x40 |
839 | }; |
840 | |
841 | ObjCDeclSpec() |
842 | : objcDeclQualifier(DQ_None), |
843 | PropertyAttributes(ObjCPropertyAttribute::kind_noattr), Nullability(0), |
844 | GetterName(nullptr), SetterName(nullptr) {} |
845 | |
846 | ObjCDeclQualifier getObjCDeclQualifier() const { |
847 | return (ObjCDeclQualifier)objcDeclQualifier; |
848 | } |
849 | void setObjCDeclQualifier(ObjCDeclQualifier DQVal) { |
850 | objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier | DQVal); |
851 | } |
852 | void clearObjCDeclQualifier(ObjCDeclQualifier DQVal) { |
853 | objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier & ~DQVal); |
854 | } |
855 | |
856 | ObjCPropertyAttribute::Kind getPropertyAttributes() const { |
857 | return ObjCPropertyAttribute::Kind(PropertyAttributes); |
858 | } |
859 | void setPropertyAttributes(ObjCPropertyAttribute::Kind PRVal) { |
860 | PropertyAttributes = |
861 | (ObjCPropertyAttribute::Kind)(PropertyAttributes | PRVal); |
862 | } |
863 | |
864 | NullabilityKind getNullability() const { |
865 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 868, __extension__ __PRETTY_FUNCTION__)) |
866 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 868, __extension__ __PRETTY_FUNCTION__)) |
867 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 868, __extension__ __PRETTY_FUNCTION__)) |
868 | "Objective-C declspec doesn't have nullability")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 868, __extension__ __PRETTY_FUNCTION__)); |
869 | return static_cast<NullabilityKind>(Nullability); |
870 | } |
871 | |
872 | SourceLocation getNullabilityLoc() const { |
873 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 876, __extension__ __PRETTY_FUNCTION__)) |
874 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 876, __extension__ __PRETTY_FUNCTION__)) |
875 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 876, __extension__ __PRETTY_FUNCTION__)) |
876 | "Objective-C declspec doesn't have nullability")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 876, __extension__ __PRETTY_FUNCTION__)); |
877 | return NullabilityLoc; |
878 | } |
879 | |
880 | void setNullability(SourceLocation loc, NullabilityKind kind) { |
881 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 884, __extension__ __PRETTY_FUNCTION__)) |
882 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 884, __extension__ __PRETTY_FUNCTION__)) |
883 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 884, __extension__ __PRETTY_FUNCTION__)) |
884 | "Set the nullability declspec or property attribute first")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 884, __extension__ __PRETTY_FUNCTION__)); |
885 | Nullability = static_cast<unsigned>(kind); |
886 | NullabilityLoc = loc; |
887 | } |
888 | |
889 | const IdentifierInfo *getGetterName() const { return GetterName; } |
890 | IdentifierInfo *getGetterName() { return GetterName; } |
891 | SourceLocation getGetterNameLoc() const { return GetterNameLoc; } |
892 | void setGetterName(IdentifierInfo *name, SourceLocation loc) { |
893 | GetterName = name; |
894 | GetterNameLoc = loc; |
895 | } |
896 | |
897 | const IdentifierInfo *getSetterName() const { return SetterName; } |
898 | IdentifierInfo *getSetterName() { return SetterName; } |
899 | SourceLocation getSetterNameLoc() const { return SetterNameLoc; } |
900 | void setSetterName(IdentifierInfo *name, SourceLocation loc) { |
901 | SetterName = name; |
902 | SetterNameLoc = loc; |
903 | } |
904 | |
905 | private: |
906 | // FIXME: These two are unrelated and mutually exclusive. So perhaps |
907 | // we can put them in a union to reflect their mutual exclusivity |
908 | // (space saving is negligible). |
909 | unsigned objcDeclQualifier : 7; |
910 | |
911 | // NOTE: VC++ treats enums as signed, avoid using ObjCPropertyAttribute::Kind |
912 | unsigned PropertyAttributes : NumObjCPropertyAttrsBits; |
913 | |
914 | unsigned Nullability : 2; |
915 | |
916 | SourceLocation NullabilityLoc; |
917 | |
918 | IdentifierInfo *GetterName; // getter name or NULL if no getter |
919 | IdentifierInfo *SetterName; // setter name or NULL if no setter |
920 | SourceLocation GetterNameLoc; // location of the getter attribute's value |
921 | SourceLocation SetterNameLoc; // location of the setter attribute's value |
922 | |
923 | }; |
924 | |
925 | /// Describes the kind of unqualified-id parsed. |
926 | enum class UnqualifiedIdKind { |
927 | /// An identifier. |
928 | IK_Identifier, |
929 | /// An overloaded operator name, e.g., operator+. |
930 | IK_OperatorFunctionId, |
931 | /// A conversion function name, e.g., operator int. |
932 | IK_ConversionFunctionId, |
933 | /// A user-defined literal name, e.g., operator "" _i. |
934 | IK_LiteralOperatorId, |
935 | /// A constructor name. |
936 | IK_ConstructorName, |
937 | /// A constructor named via a template-id. |
938 | IK_ConstructorTemplateId, |
939 | /// A destructor name. |
940 | IK_DestructorName, |
941 | /// A template-id, e.g., f<int>. |
942 | IK_TemplateId, |
943 | /// An implicit 'self' parameter |
944 | IK_ImplicitSelfParam, |
945 | /// A deduction-guide name (a template-name) |
946 | IK_DeductionGuideName |
947 | }; |
948 | |
949 | /// Represents a C++ unqualified-id that has been parsed. |
950 | class UnqualifiedId { |
951 | private: |
952 | UnqualifiedId(const UnqualifiedId &Other) = delete; |
953 | const UnqualifiedId &operator=(const UnqualifiedId &) = delete; |
954 | |
955 | public: |
956 | /// Describes the kind of unqualified-id parsed. |
957 | UnqualifiedIdKind Kind; |
958 | |
959 | struct OFI { |
960 | /// The kind of overloaded operator. |
961 | OverloadedOperatorKind Operator; |
962 | |
963 | /// The source locations of the individual tokens that name |
964 | /// the operator, e.g., the "new", "[", and "]" tokens in |
965 | /// operator new []. |
966 | /// |
967 | /// Different operators have different numbers of tokens in their name, |
968 | /// up to three. Any remaining source locations in this array will be |
969 | /// set to an invalid value for operators with fewer than three tokens. |
970 | SourceLocation SymbolLocations[3]; |
971 | }; |
972 | |
973 | /// Anonymous union that holds extra data associated with the |
974 | /// parsed unqualified-id. |
975 | union { |
976 | /// When Kind == IK_Identifier, the parsed identifier, or when |
977 | /// Kind == IK_UserLiteralId, the identifier suffix. |
978 | IdentifierInfo *Identifier; |
979 | |
980 | /// When Kind == IK_OperatorFunctionId, the overloaded operator |
981 | /// that we parsed. |
982 | struct OFI OperatorFunctionId; |
983 | |
984 | /// When Kind == IK_ConversionFunctionId, the type that the |
985 | /// conversion function names. |
986 | UnionParsedType ConversionFunctionId; |
987 | |
988 | /// When Kind == IK_ConstructorName, the class-name of the type |
989 | /// whose constructor is being referenced. |
990 | UnionParsedType ConstructorName; |
991 | |
992 | /// When Kind == IK_DestructorName, the type referred to by the |
993 | /// class-name. |
994 | UnionParsedType DestructorName; |
995 | |
996 | /// When Kind == IK_DeductionGuideName, the parsed template-name. |
997 | UnionParsedTemplateTy TemplateName; |
998 | |
999 | /// When Kind == IK_TemplateId or IK_ConstructorTemplateId, |
1000 | /// the template-id annotation that contains the template name and |
1001 | /// template arguments. |
1002 | TemplateIdAnnotation *TemplateId; |
1003 | }; |
1004 | |
1005 | /// The location of the first token that describes this unqualified-id, |
1006 | /// which will be the location of the identifier, "operator" keyword, |
1007 | /// tilde (for a destructor), or the template name of a template-id. |
1008 | SourceLocation StartLocation; |
1009 | |
1010 | /// The location of the last token that describes this unqualified-id. |
1011 | SourceLocation EndLocation; |
1012 | |
1013 | UnqualifiedId() |
1014 | : Kind(UnqualifiedIdKind::IK_Identifier), Identifier(nullptr) {} |
1015 | |
1016 | /// Clear out this unqualified-id, setting it to default (invalid) |
1017 | /// state. |
1018 | void clear() { |
1019 | Kind = UnqualifiedIdKind::IK_Identifier; |
1020 | Identifier = nullptr; |
1021 | StartLocation = SourceLocation(); |
1022 | EndLocation = SourceLocation(); |
1023 | } |
1024 | |
1025 | /// Determine whether this unqualified-id refers to a valid name. |
1026 | bool isValid() const { return StartLocation.isValid(); } |
1027 | |
1028 | /// Determine whether this unqualified-id refers to an invalid name. |
1029 | bool isInvalid() const { return !isValid(); } |
1030 | |
1031 | /// Determine what kind of name we have. |
1032 | UnqualifiedIdKind getKind() const { return Kind; } |
1033 | |
1034 | /// Specify that this unqualified-id was parsed as an identifier. |
1035 | /// |
1036 | /// \param Id the parsed identifier. |
1037 | /// \param IdLoc the location of the parsed identifier. |
1038 | void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc) { |
1039 | Kind = UnqualifiedIdKind::IK_Identifier; |
1040 | Identifier = const_cast<IdentifierInfo *>(Id); |
1041 | StartLocation = EndLocation = IdLoc; |
1042 | } |
1043 | |
1044 | /// Specify that this unqualified-id was parsed as an |
1045 | /// operator-function-id. |
1046 | /// |
1047 | /// \param OperatorLoc the location of the 'operator' keyword. |
1048 | /// |
1049 | /// \param Op the overloaded operator. |
1050 | /// |
1051 | /// \param SymbolLocations the locations of the individual operator symbols |
1052 | /// in the operator. |
1053 | void setOperatorFunctionId(SourceLocation OperatorLoc, |
1054 | OverloadedOperatorKind Op, |
1055 | SourceLocation SymbolLocations[3]); |
1056 | |
1057 | /// Specify that this unqualified-id was parsed as a |
1058 | /// conversion-function-id. |
1059 | /// |
1060 | /// \param OperatorLoc the location of the 'operator' keyword. |
1061 | /// |
1062 | /// \param Ty the type to which this conversion function is converting. |
1063 | /// |
1064 | /// \param EndLoc the location of the last token that makes up the type name. |
1065 | void setConversionFunctionId(SourceLocation OperatorLoc, |
1066 | ParsedType Ty, |
1067 | SourceLocation EndLoc) { |
1068 | Kind = UnqualifiedIdKind::IK_ConversionFunctionId; |
1069 | StartLocation = OperatorLoc; |
1070 | EndLocation = EndLoc; |
1071 | ConversionFunctionId = Ty; |
1072 | } |
1073 | |
1074 | /// Specific that this unqualified-id was parsed as a |
1075 | /// literal-operator-id. |
1076 | /// |
1077 | /// \param Id the parsed identifier. |
1078 | /// |
1079 | /// \param OpLoc the location of the 'operator' keyword. |
1080 | /// |
1081 | /// \param IdLoc the location of the identifier. |
1082 | void setLiteralOperatorId(const IdentifierInfo *Id, SourceLocation OpLoc, |
1083 | SourceLocation IdLoc) { |
1084 | Kind = UnqualifiedIdKind::IK_LiteralOperatorId; |
1085 | Identifier = const_cast<IdentifierInfo *>(Id); |
1086 | StartLocation = OpLoc; |
1087 | EndLocation = IdLoc; |
1088 | } |
1089 | |
1090 | /// Specify that this unqualified-id was parsed as a constructor name. |
1091 | /// |
1092 | /// \param ClassType the class type referred to by the constructor name. |
1093 | /// |
1094 | /// \param ClassNameLoc the location of the class name. |
1095 | /// |
1096 | /// \param EndLoc the location of the last token that makes up the type name. |
1097 | void setConstructorName(ParsedType ClassType, |
1098 | SourceLocation ClassNameLoc, |
1099 | SourceLocation EndLoc) { |
1100 | Kind = UnqualifiedIdKind::IK_ConstructorName; |
1101 | StartLocation = ClassNameLoc; |
1102 | EndLocation = EndLoc; |
1103 | ConstructorName = ClassType; |
1104 | } |
1105 | |
1106 | /// Specify that this unqualified-id was parsed as a |
1107 | /// template-id that names a constructor. |
1108 | /// |
1109 | /// \param TemplateId the template-id annotation that describes the parsed |
1110 | /// template-id. This UnqualifiedId instance will take ownership of the |
1111 | /// \p TemplateId and will free it on destruction. |
1112 | void setConstructorTemplateId(TemplateIdAnnotation *TemplateId); |
1113 | |
1114 | /// Specify that this unqualified-id was parsed as a destructor name. |
1115 | /// |
1116 | /// \param TildeLoc the location of the '~' that introduces the destructor |
1117 | /// name. |
1118 | /// |
1119 | /// \param ClassType the name of the class referred to by the destructor name. |
1120 | void setDestructorName(SourceLocation TildeLoc, |
1121 | ParsedType ClassType, |
1122 | SourceLocation EndLoc) { |
1123 | Kind = UnqualifiedIdKind::IK_DestructorName; |
1124 | StartLocation = TildeLoc; |
1125 | EndLocation = EndLoc; |
1126 | DestructorName = ClassType; |
1127 | } |
1128 | |
1129 | /// Specify that this unqualified-id was parsed as a template-id. |
1130 | /// |
1131 | /// \param TemplateId the template-id annotation that describes the parsed |
1132 | /// template-id. This UnqualifiedId instance will take ownership of the |
1133 | /// \p TemplateId and will free it on destruction. |
1134 | void setTemplateId(TemplateIdAnnotation *TemplateId); |
1135 | |
1136 | /// Specify that this unqualified-id was parsed as a template-name for |
1137 | /// a deduction-guide. |
1138 | /// |
1139 | /// \param Template The parsed template-name. |
1140 | /// \param TemplateLoc The location of the parsed template-name. |
1141 | void setDeductionGuideName(ParsedTemplateTy Template, |
1142 | SourceLocation TemplateLoc) { |
1143 | Kind = UnqualifiedIdKind::IK_DeductionGuideName; |
1144 | TemplateName = Template; |
1145 | StartLocation = EndLocation = TemplateLoc; |
1146 | } |
1147 | |
1148 | /// Specify that this unqualified-id is an implicit 'self' |
1149 | /// parameter. |
1150 | /// |
1151 | /// \param Id the identifier. |
1152 | void setImplicitSelfParam(const IdentifierInfo *Id) { |
1153 | Kind = UnqualifiedIdKind::IK_ImplicitSelfParam; |
1154 | Identifier = const_cast<IdentifierInfo *>(Id); |
1155 | StartLocation = EndLocation = SourceLocation(); |
1156 | } |
1157 | |
1158 | /// Return the source range that covers this unqualified-id. |
1159 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { |
1160 | return SourceRange(StartLocation, EndLocation); |
1161 | } |
1162 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return StartLocation; } |
1163 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return EndLocation; } |
1164 | }; |
1165 | |
1166 | /// A set of tokens that has been cached for later parsing. |
1167 | typedef SmallVector<Token, 4> CachedTokens; |
1168 | |
1169 | /// One instance of this struct is used for each type in a |
1170 | /// declarator that is parsed. |
1171 | /// |
1172 | /// This is intended to be a small value object. |
1173 | struct DeclaratorChunk { |
1174 | DeclaratorChunk() {}; |
1175 | |
1176 | enum { |
1177 | Pointer, Reference, Array, Function, BlockPointer, MemberPointer, Paren, Pipe |
1178 | } Kind; |
1179 | |
1180 | /// Loc - The place where this type was defined. |
1181 | SourceLocation Loc; |
1182 | /// EndLoc - If valid, the place where this chunck ends. |
1183 | SourceLocation EndLoc; |
1184 | |
1185 | SourceRange getSourceRange() const { |
1186 | if (EndLoc.isInvalid()) |
1187 | return SourceRange(Loc, Loc); |
1188 | return SourceRange(Loc, EndLoc); |
1189 | } |
1190 | |
1191 | ParsedAttributesView AttrList; |
1192 | |
1193 | struct PointerTypeInfo { |
1194 | /// The type qualifiers: const/volatile/restrict/unaligned/atomic. |
1195 | unsigned TypeQuals : 5; |
1196 | |
1197 | /// The location of the const-qualifier, if any. |
1198 | SourceLocation ConstQualLoc; |
1199 | |
1200 | /// The location of the volatile-qualifier, if any. |
1201 | SourceLocation VolatileQualLoc; |
1202 | |
1203 | /// The location of the restrict-qualifier, if any. |
1204 | SourceLocation RestrictQualLoc; |
1205 | |
1206 | /// The location of the _Atomic-qualifier, if any. |
1207 | SourceLocation AtomicQualLoc; |
1208 | |
1209 | /// The location of the __unaligned-qualifier, if any. |
1210 | SourceLocation UnalignedQualLoc; |
1211 | |
1212 | void destroy() { |
1213 | } |
1214 | }; |
1215 | |
1216 | struct ReferenceTypeInfo { |
1217 | /// The type qualifier: restrict. [GNU] C++ extension |
1218 | bool HasRestrict : 1; |
1219 | /// True if this is an lvalue reference, false if it's an rvalue reference. |
1220 | bool LValueRef : 1; |
1221 | void destroy() { |
1222 | } |
1223 | }; |
1224 | |
1225 | struct ArrayTypeInfo { |
1226 | /// The type qualifiers for the array: |
1227 | /// const/volatile/restrict/__unaligned/_Atomic. |
1228 | unsigned TypeQuals : 5; |
1229 | |
1230 | /// True if this dimension included the 'static' keyword. |
1231 | unsigned hasStatic : 1; |
1232 | |
1233 | /// True if this dimension was [*]. In this case, NumElts is null. |
1234 | unsigned isStar : 1; |
1235 | |
1236 | /// This is the size of the array, or null if [] or [*] was specified. |
1237 | /// Since the parser is multi-purpose, and we don't want to impose a root |
1238 | /// expression class on all clients, NumElts is untyped. |
1239 | Expr *NumElts; |
1240 | |
1241 | void destroy() {} |
1242 | }; |
1243 | |
1244 | /// ParamInfo - An array of paraminfo objects is allocated whenever a function |
1245 | /// declarator is parsed. There are two interesting styles of parameters |
1246 | /// here: |
1247 | /// K&R-style identifier lists and parameter type lists. K&R-style identifier |
1248 | /// lists will have information about the identifier, but no type information. |
1249 | /// Parameter type lists will have type info (if the actions module provides |
1250 | /// it), but may have null identifier info: e.g. for 'void foo(int X, int)'. |
1251 | struct ParamInfo { |
1252 | IdentifierInfo *Ident; |
1253 | SourceLocation IdentLoc; |
1254 | Decl *Param; |
1255 | |
1256 | /// DefaultArgTokens - When the parameter's default argument |
1257 | /// cannot be parsed immediately (because it occurs within the |
1258 | /// declaration of a member function), it will be stored here as a |
1259 | /// sequence of tokens to be parsed once the class definition is |
1260 | /// complete. Non-NULL indicates that there is a default argument. |
1261 | std::unique_ptr<CachedTokens> DefaultArgTokens; |
1262 | |
1263 | ParamInfo() = default; |
1264 | ParamInfo(IdentifierInfo *ident, SourceLocation iloc, |
1265 | Decl *param, |
1266 | std::unique_ptr<CachedTokens> DefArgTokens = nullptr) |
1267 | : Ident(ident), IdentLoc(iloc), Param(param), |
1268 | DefaultArgTokens(std::move(DefArgTokens)) {} |
1269 | }; |
1270 | |
1271 | struct TypeAndRange { |
1272 | ParsedType Ty; |
1273 | SourceRange Range; |
1274 | }; |
1275 | |
1276 | struct FunctionTypeInfo { |
1277 | /// hasPrototype - This is true if the function had at least one typed |
1278 | /// parameter. If the function is () or (a,b,c), then it has no prototype, |
1279 | /// and is treated as a K&R-style function. |
1280 | unsigned hasPrototype : 1; |
1281 | |
1282 | /// isVariadic - If this function has a prototype, and if that |
1283 | /// proto ends with ',...)', this is true. When true, EllipsisLoc |
1284 | /// contains the location of the ellipsis. |
1285 | unsigned isVariadic : 1; |
1286 | |
1287 | /// Can this declaration be a constructor-style initializer? |
1288 | unsigned isAmbiguous : 1; |
1289 | |
1290 | /// Whether the ref-qualifier (if any) is an lvalue reference. |
1291 | /// Otherwise, it's an rvalue reference. |
1292 | unsigned RefQualifierIsLValueRef : 1; |
1293 | |
1294 | /// ExceptionSpecType - An ExceptionSpecificationType value. |
1295 | unsigned ExceptionSpecType : 4; |
1296 | |
1297 | /// DeleteParams - If this is true, we need to delete[] Params. |
1298 | unsigned DeleteParams : 1; |
1299 | |
1300 | /// HasTrailingReturnType - If this is true, a trailing return type was |
1301 | /// specified. |
1302 | unsigned HasTrailingReturnType : 1; |
1303 | |
1304 | /// The location of the left parenthesis in the source. |
1305 | SourceLocation LParenLoc; |
1306 | |
1307 | /// When isVariadic is true, the location of the ellipsis in the source. |
1308 | SourceLocation EllipsisLoc; |
1309 | |
1310 | /// The location of the right parenthesis in the source. |
1311 | SourceLocation RParenLoc; |
1312 | |
1313 | /// NumParams - This is the number of formal parameters specified by the |
1314 | /// declarator. |
1315 | unsigned NumParams; |
1316 | |
1317 | /// NumExceptionsOrDecls - This is the number of types in the |
1318 | /// dynamic-exception-decl, if the function has one. In C, this is the |
1319 | /// number of declarations in the function prototype. |
1320 | unsigned NumExceptionsOrDecls; |
1321 | |
1322 | /// The location of the ref-qualifier, if any. |
1323 | /// |
1324 | /// If this is an invalid location, there is no ref-qualifier. |
1325 | SourceLocation RefQualifierLoc; |
1326 | |
1327 | /// The location of the 'mutable' qualifer in a lambda-declarator, if |
1328 | /// any. |
1329 | SourceLocation MutableLoc; |
1330 | |
1331 | /// The beginning location of the exception specification, if any. |
1332 | SourceLocation ExceptionSpecLocBeg; |
1333 | |
1334 | /// The end location of the exception specification, if any. |
1335 | SourceLocation ExceptionSpecLocEnd; |
1336 | |
1337 | /// Params - This is a pointer to a new[]'d array of ParamInfo objects that |
1338 | /// describe the parameters specified by this function declarator. null if |
1339 | /// there are no parameters specified. |
1340 | ParamInfo *Params; |
1341 | |
1342 | /// DeclSpec for the function with the qualifier related info. |
1343 | DeclSpec *MethodQualifiers; |
1344 | |
1345 | /// AtttibuteFactory for the MethodQualifiers. |
1346 | AttributeFactory *QualAttrFactory; |
1347 | |
1348 | union { |
1349 | /// Pointer to a new[]'d array of TypeAndRange objects that |
1350 | /// contain the types in the function's dynamic exception specification |
1351 | /// and their locations, if there is one. |
1352 | TypeAndRange *Exceptions; |
1353 | |
1354 | /// Pointer to the expression in the noexcept-specifier of this |
1355 | /// function, if it has one. |
1356 | Expr *NoexceptExpr; |
1357 | |
1358 | /// Pointer to the cached tokens for an exception-specification |
1359 | /// that has not yet been parsed. |
1360 | CachedTokens *ExceptionSpecTokens; |
1361 | |
1362 | /// Pointer to a new[]'d array of declarations that need to be available |
1363 | /// for lookup inside the function body, if one exists. Does not exist in |
1364 | /// C++. |
1365 | NamedDecl **DeclsInPrototype; |
1366 | }; |
1367 | |
1368 | /// If HasTrailingReturnType is true, this is the trailing return |
1369 | /// type specified. |
1370 | UnionParsedType TrailingReturnType; |
1371 | |
1372 | /// If HasTrailingReturnType is true, this is the location of the trailing |
1373 | /// return type. |
1374 | SourceLocation TrailingReturnTypeLoc; |
1375 | |
1376 | /// Reset the parameter list to having zero parameters. |
1377 | /// |
1378 | /// This is used in various places for error recovery. |
1379 | void freeParams() { |
1380 | for (unsigned I = 0; I < NumParams; ++I) |
1381 | Params[I].DefaultArgTokens.reset(); |
1382 | if (DeleteParams) { |
1383 | delete[] Params; |
1384 | DeleteParams = false; |
1385 | } |
1386 | NumParams = 0; |
1387 | } |
1388 | |
1389 | void destroy() { |
1390 | freeParams(); |
1391 | delete QualAttrFactory; |
1392 | delete MethodQualifiers; |
1393 | switch (getExceptionSpecType()) { |
1394 | default: |
1395 | break; |
1396 | case EST_Dynamic: |
1397 | delete[] Exceptions; |
1398 | break; |
1399 | case EST_Unparsed: |
1400 | delete ExceptionSpecTokens; |
1401 | break; |
1402 | case EST_None: |
1403 | if (NumExceptionsOrDecls != 0) |
1404 | delete[] DeclsInPrototype; |
1405 | break; |
1406 | } |
1407 | } |
1408 | |
1409 | DeclSpec &getOrCreateMethodQualifiers() { |
1410 | if (!MethodQualifiers) { |
1411 | QualAttrFactory = new AttributeFactory(); |
1412 | MethodQualifiers = new DeclSpec(*QualAttrFactory); |
1413 | } |
1414 | return *MethodQualifiers; |
1415 | } |
1416 | |
1417 | /// isKNRPrototype - Return true if this is a K&R style identifier list, |
1418 | /// like "void foo(a,b,c)". In a function definition, this will be followed |
1419 | /// by the parameter type definitions. |
1420 | bool isKNRPrototype() const { return !hasPrototype && NumParams != 0; } |
1421 | |
1422 | SourceLocation getLParenLoc() const { return LParenLoc; } |
1423 | |
1424 | SourceLocation getEllipsisLoc() const { return EllipsisLoc; } |
1425 | |
1426 | SourceLocation getRParenLoc() const { return RParenLoc; } |
1427 | |
1428 | SourceLocation getExceptionSpecLocBeg() const { |
1429 | return ExceptionSpecLocBeg; |
1430 | } |
1431 | |
1432 | SourceLocation getExceptionSpecLocEnd() const { |
1433 | return ExceptionSpecLocEnd; |
1434 | } |
1435 | |
1436 | SourceRange getExceptionSpecRange() const { |
1437 | return SourceRange(getExceptionSpecLocBeg(), getExceptionSpecLocEnd()); |
1438 | } |
1439 | |
1440 | /// Retrieve the location of the ref-qualifier, if any. |
1441 | SourceLocation getRefQualifierLoc() const { return RefQualifierLoc; } |
1442 | |
1443 | /// Retrieve the location of the 'const' qualifier. |
1444 | SourceLocation getConstQualifierLoc() const { |
1445 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 1445, __extension__ __PRETTY_FUNCTION__)); |
1446 | return MethodQualifiers->getConstSpecLoc(); |
1447 | } |
1448 | |
1449 | /// Retrieve the location of the 'volatile' qualifier. |
1450 | SourceLocation getVolatileQualifierLoc() const { |
1451 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 1451, __extension__ __PRETTY_FUNCTION__)); |
1452 | return MethodQualifiers->getVolatileSpecLoc(); |
1453 | } |
1454 | |
1455 | /// Retrieve the location of the 'restrict' qualifier. |
1456 | SourceLocation getRestrictQualifierLoc() const { |
1457 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 1457, __extension__ __PRETTY_FUNCTION__)); |
1458 | return MethodQualifiers->getRestrictSpecLoc(); |
1459 | } |
1460 | |
1461 | /// Retrieve the location of the 'mutable' qualifier, if any. |
1462 | SourceLocation getMutableLoc() const { return MutableLoc; } |
1463 | |
1464 | /// Determine whether this function declaration contains a |
1465 | /// ref-qualifier. |
1466 | bool hasRefQualifier() const { return getRefQualifierLoc().isValid(); } |
1467 | |
1468 | /// Determine whether this lambda-declarator contains a 'mutable' |
1469 | /// qualifier. |
1470 | bool hasMutableQualifier() const { return getMutableLoc().isValid(); } |
1471 | |
1472 | /// Determine whether this method has qualifiers. |
1473 | bool hasMethodTypeQualifiers() const { |
1474 | return MethodQualifiers && (MethodQualifiers->getTypeQualifiers() || |
1475 | MethodQualifiers->getAttributes().size()); |
1476 | } |
1477 | |
1478 | /// Get the type of exception specification this function has. |
1479 | ExceptionSpecificationType getExceptionSpecType() const { |
1480 | return static_cast<ExceptionSpecificationType>(ExceptionSpecType); |
1481 | } |
1482 | |
1483 | /// Get the number of dynamic exception specifications. |
1484 | unsigned getNumExceptions() const { |
1485 | assert(ExceptionSpecType != EST_None)(static_cast <bool> (ExceptionSpecType != EST_None) ? void (0) : __assert_fail ("ExceptionSpecType != EST_None", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 1485, __extension__ __PRETTY_FUNCTION__)); |
1486 | return NumExceptionsOrDecls; |
1487 | } |
1488 | |
1489 | /// Get the non-parameter decls defined within this function |
1490 | /// prototype. Typically these are tag declarations. |
1491 | ArrayRef<NamedDecl *> getDeclsInPrototype() const { |
1492 | assert(ExceptionSpecType == EST_None)(static_cast <bool> (ExceptionSpecType == EST_None) ? void (0) : __assert_fail ("ExceptionSpecType == EST_None", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 1492, __extension__ __PRETTY_FUNCTION__)); |
1493 | return llvm::makeArrayRef(DeclsInPrototype, NumExceptionsOrDecls); |
1494 | } |
1495 | |
1496 | /// Determine whether this function declarator had a |
1497 | /// trailing-return-type. |
1498 | bool hasTrailingReturnType() const { return HasTrailingReturnType; } |
1499 | |
1500 | /// Get the trailing-return-type for this function declarator. |
1501 | ParsedType getTrailingReturnType() const { |
1502 | assert(HasTrailingReturnType)(static_cast <bool> (HasTrailingReturnType) ? void (0) : __assert_fail ("HasTrailingReturnType", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 1502, __extension__ __PRETTY_FUNCTION__)); |
1503 | return TrailingReturnType; |
1504 | } |
1505 | |
1506 | /// Get the trailing-return-type location for this function declarator. |
1507 | SourceLocation getTrailingReturnTypeLoc() const { |
1508 | assert(HasTrailingReturnType)(static_cast <bool> (HasTrailingReturnType) ? void (0) : __assert_fail ("HasTrailingReturnType", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 1508, __extension__ __PRETTY_FUNCTION__)); |
1509 | return TrailingReturnTypeLoc; |
1510 | } |
1511 | }; |
1512 | |
1513 | struct BlockPointerTypeInfo { |
1514 | /// For now, sema will catch these as invalid. |
1515 | /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic. |
1516 | unsigned TypeQuals : 5; |
1517 | |
1518 | void destroy() { |
1519 | } |
1520 | }; |
1521 | |
1522 | struct MemberPointerTypeInfo { |
1523 | /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic. |
1524 | unsigned TypeQuals : 5; |
1525 | /// Location of the '*' token. |
1526 | SourceLocation StarLoc; |
1527 | // CXXScopeSpec has a constructor, so it can't be a direct member. |
1528 | // So we need some pointer-aligned storage and a bit of trickery. |
1529 | alignas(CXXScopeSpec) char ScopeMem[sizeof(CXXScopeSpec)]; |
1530 | CXXScopeSpec &Scope() { |
1531 | return *reinterpret_cast<CXXScopeSpec *>(ScopeMem); |
1532 | } |
1533 | const CXXScopeSpec &Scope() const { |
1534 | return *reinterpret_cast<const CXXScopeSpec *>(ScopeMem); |
1535 | } |
1536 | void destroy() { |
1537 | Scope().~CXXScopeSpec(); |
1538 | } |
1539 | }; |
1540 | |
1541 | struct PipeTypeInfo { |
1542 | /// The access writes. |
1543 | unsigned AccessWrites : 3; |
1544 | |
1545 | void destroy() {} |
1546 | }; |
1547 | |
1548 | union { |
1549 | PointerTypeInfo Ptr; |
1550 | ReferenceTypeInfo Ref; |
1551 | ArrayTypeInfo Arr; |
1552 | FunctionTypeInfo Fun; |
1553 | BlockPointerTypeInfo Cls; |
1554 | MemberPointerTypeInfo Mem; |
1555 | PipeTypeInfo PipeInfo; |
1556 | }; |
1557 | |
1558 | void destroy() { |
1559 | switch (Kind) { |
1560 | case DeclaratorChunk::Function: return Fun.destroy(); |
1561 | case DeclaratorChunk::Pointer: return Ptr.destroy(); |
1562 | case DeclaratorChunk::BlockPointer: return Cls.destroy(); |
1563 | case DeclaratorChunk::Reference: return Ref.destroy(); |
1564 | case DeclaratorChunk::Array: return Arr.destroy(); |
1565 | case DeclaratorChunk::MemberPointer: return Mem.destroy(); |
1566 | case DeclaratorChunk::Paren: return; |
1567 | case DeclaratorChunk::Pipe: return PipeInfo.destroy(); |
1568 | } |
1569 | } |
1570 | |
1571 | /// If there are attributes applied to this declaratorchunk, return |
1572 | /// them. |
1573 | const ParsedAttributesView &getAttrs() const { return AttrList; } |
1574 | ParsedAttributesView &getAttrs() { return AttrList; } |
1575 | |
1576 | /// Return a DeclaratorChunk for a pointer. |
1577 | static DeclaratorChunk getPointer(unsigned TypeQuals, SourceLocation Loc, |
1578 | SourceLocation ConstQualLoc, |
1579 | SourceLocation VolatileQualLoc, |
1580 | SourceLocation RestrictQualLoc, |
1581 | SourceLocation AtomicQualLoc, |
1582 | SourceLocation UnalignedQualLoc) { |
1583 | DeclaratorChunk I; |
1584 | I.Kind = Pointer; |
1585 | I.Loc = Loc; |
1586 | new (&I.Ptr) PointerTypeInfo; |
1587 | I.Ptr.TypeQuals = TypeQuals; |
1588 | I.Ptr.ConstQualLoc = ConstQualLoc; |
1589 | I.Ptr.VolatileQualLoc = VolatileQualLoc; |
1590 | I.Ptr.RestrictQualLoc = RestrictQualLoc; |
1591 | I.Ptr.AtomicQualLoc = AtomicQualLoc; |
1592 | I.Ptr.UnalignedQualLoc = UnalignedQualLoc; |
1593 | return I; |
1594 | } |
1595 | |
1596 | /// Return a DeclaratorChunk for a reference. |
1597 | static DeclaratorChunk getReference(unsigned TypeQuals, SourceLocation Loc, |
1598 | bool lvalue) { |
1599 | DeclaratorChunk I; |
1600 | I.Kind = Reference; |
1601 | I.Loc = Loc; |
1602 | I.Ref.HasRestrict = (TypeQuals & DeclSpec::TQ_restrict) != 0; |
1603 | I.Ref.LValueRef = lvalue; |
1604 | return I; |
1605 | } |
1606 | |
1607 | /// Return a DeclaratorChunk for an array. |
1608 | static DeclaratorChunk getArray(unsigned TypeQuals, |
1609 | bool isStatic, bool isStar, Expr *NumElts, |
1610 | SourceLocation LBLoc, SourceLocation RBLoc) { |
1611 | DeclaratorChunk I; |
1612 | I.Kind = Array; |
1613 | I.Loc = LBLoc; |
1614 | I.EndLoc = RBLoc; |
1615 | I.Arr.TypeQuals = TypeQuals; |
1616 | I.Arr.hasStatic = isStatic; |
1617 | I.Arr.isStar = isStar; |
1618 | I.Arr.NumElts = NumElts; |
1619 | return I; |
1620 | } |
1621 | |
1622 | /// DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function. |
1623 | /// "TheDeclarator" is the declarator that this will be added to. |
1624 | static DeclaratorChunk getFunction(bool HasProto, |
1625 | bool IsAmbiguous, |
1626 | SourceLocation LParenLoc, |
1627 | ParamInfo *Params, unsigned NumParams, |
1628 | SourceLocation EllipsisLoc, |
1629 | SourceLocation RParenLoc, |
1630 | bool RefQualifierIsLvalueRef, |
1631 | SourceLocation RefQualifierLoc, |
1632 | SourceLocation MutableLoc, |
1633 | ExceptionSpecificationType ESpecType, |
1634 | SourceRange ESpecRange, |
1635 | ParsedType *Exceptions, |
1636 | SourceRange *ExceptionRanges, |
1637 | unsigned NumExceptions, |
1638 | Expr *NoexceptExpr, |
1639 | CachedTokens *ExceptionSpecTokens, |
1640 | ArrayRef<NamedDecl *> DeclsInPrototype, |
1641 | SourceLocation LocalRangeBegin, |
1642 | SourceLocation LocalRangeEnd, |
1643 | Declarator &TheDeclarator, |
1644 | TypeResult TrailingReturnType = |
1645 | TypeResult(), |
1646 | SourceLocation TrailingReturnTypeLoc = |
1647 | SourceLocation(), |
1648 | DeclSpec *MethodQualifiers = nullptr); |
1649 | |
1650 | /// Return a DeclaratorChunk for a block. |
1651 | static DeclaratorChunk getBlockPointer(unsigned TypeQuals, |
1652 | SourceLocation Loc) { |
1653 | DeclaratorChunk I; |
1654 | I.Kind = BlockPointer; |
1655 | I.Loc = Loc; |
1656 | I.Cls.TypeQuals = TypeQuals; |
1657 | return I; |
1658 | } |
1659 | |
1660 | /// Return a DeclaratorChunk for a block. |
1661 | static DeclaratorChunk getPipe(unsigned TypeQuals, |
1662 | SourceLocation Loc) { |
1663 | DeclaratorChunk I; |
1664 | I.Kind = Pipe; |
1665 | I.Loc = Loc; |
1666 | I.Cls.TypeQuals = TypeQuals; |
1667 | return I; |
1668 | } |
1669 | |
1670 | static DeclaratorChunk getMemberPointer(const CXXScopeSpec &SS, |
1671 | unsigned TypeQuals, |
1672 | SourceLocation StarLoc, |
1673 | SourceLocation EndLoc) { |
1674 | DeclaratorChunk I; |
1675 | I.Kind = MemberPointer; |
1676 | I.Loc = SS.getBeginLoc(); |
1677 | I.EndLoc = EndLoc; |
1678 | new (&I.Mem) MemberPointerTypeInfo; |
1679 | I.Mem.StarLoc = StarLoc; |
1680 | I.Mem.TypeQuals = TypeQuals; |
1681 | new (I.Mem.ScopeMem) CXXScopeSpec(SS); |
1682 | return I; |
1683 | } |
1684 | |
1685 | /// Return a DeclaratorChunk for a paren. |
1686 | static DeclaratorChunk getParen(SourceLocation LParenLoc, |
1687 | SourceLocation RParenLoc) { |
1688 | DeclaratorChunk I; |
1689 | I.Kind = Paren; |
1690 | I.Loc = LParenLoc; |
1691 | I.EndLoc = RParenLoc; |
1692 | return I; |
1693 | } |
1694 | |
1695 | bool isParen() const { |
1696 | return Kind == Paren; |
1697 | } |
1698 | }; |
1699 | |
1700 | /// A parsed C++17 decomposition declarator of the form |
1701 | /// '[' identifier-list ']' |
1702 | class DecompositionDeclarator { |
1703 | public: |
1704 | struct Binding { |
1705 | IdentifierInfo *Name; |
1706 | SourceLocation NameLoc; |
1707 | }; |
1708 | |
1709 | private: |
1710 | /// The locations of the '[' and ']' tokens. |
1711 | SourceLocation LSquareLoc, RSquareLoc; |
1712 | |
1713 | /// The bindings. |
1714 | Binding *Bindings; |
1715 | unsigned NumBindings : 31; |
1716 | unsigned DeleteBindings : 1; |
1717 | |
1718 | friend class Declarator; |
1719 | |
1720 | public: |
1721 | DecompositionDeclarator() |
1722 | : Bindings(nullptr), NumBindings(0), DeleteBindings(false) {} |
1723 | DecompositionDeclarator(const DecompositionDeclarator &G) = delete; |
1724 | DecompositionDeclarator &operator=(const DecompositionDeclarator &G) = delete; |
1725 | ~DecompositionDeclarator() { |
1726 | if (DeleteBindings) |
1727 | delete[] Bindings; |
1728 | } |
1729 | |
1730 | void clear() { |
1731 | LSquareLoc = RSquareLoc = SourceLocation(); |
1732 | if (DeleteBindings) |
1733 | delete[] Bindings; |
1734 | Bindings = nullptr; |
1735 | NumBindings = 0; |
1736 | DeleteBindings = false; |
1737 | } |
1738 | |
1739 | ArrayRef<Binding> bindings() const { |
1740 | return llvm::makeArrayRef(Bindings, NumBindings); |
1741 | } |
1742 | |
1743 | bool isSet() const { return LSquareLoc.isValid(); } |
1744 | |
1745 | SourceLocation getLSquareLoc() const { return LSquareLoc; } |
1746 | SourceLocation getRSquareLoc() const { return RSquareLoc; } |
1747 | SourceRange getSourceRange() const { |
1748 | return SourceRange(LSquareLoc, RSquareLoc); |
1749 | } |
1750 | }; |
1751 | |
1752 | /// Described the kind of function definition (if any) provided for |
1753 | /// a function. |
1754 | enum class FunctionDefinitionKind { |
1755 | Declaration, |
1756 | Definition, |
1757 | Defaulted, |
1758 | Deleted |
1759 | }; |
1760 | |
1761 | enum class DeclaratorContext { |
1762 | File, // File scope declaration. |
1763 | Prototype, // Within a function prototype. |
1764 | ObjCResult, // An ObjC method result type. |
1765 | ObjCParameter, // An ObjC method parameter type. |
1766 | KNRTypeList, // K&R type definition list for formals. |
1767 | TypeName, // Abstract declarator for types. |
1768 | FunctionalCast, // Type in a C++ functional cast expression. |
1769 | Member, // Struct/Union field. |
1770 | Block, // Declaration within a block in a function. |
1771 | ForInit, // Declaration within first part of a for loop. |
1772 | SelectionInit, // Declaration within optional init stmt of if/switch. |
1773 | Condition, // Condition declaration in a C++ if/switch/while/for. |
1774 | TemplateParam, // Within a template parameter list. |
1775 | CXXNew, // C++ new-expression. |
1776 | CXXCatch, // C++ catch exception-declaration |
1777 | ObjCCatch, // Objective-C catch exception-declaration |
1778 | BlockLiteral, // Block literal declarator. |
1779 | LambdaExpr, // Lambda-expression declarator. |
1780 | LambdaExprParameter, // Lambda-expression parameter declarator. |
1781 | ConversionId, // C++ conversion-type-id. |
1782 | TrailingReturn, // C++11 trailing-type-specifier. |
1783 | TrailingReturnVar, // C++11 trailing-type-specifier for variable. |
1784 | TemplateArg, // Any template argument (in template argument list). |
1785 | TemplateTypeArg, // Template type argument (in default argument). |
1786 | AliasDecl, // C++11 alias-declaration. |
1787 | AliasTemplate, // C++11 alias-declaration template. |
1788 | RequiresExpr // C++2a requires-expression. |
1789 | }; |
1790 | |
1791 | /// Information about one declarator, including the parsed type |
1792 | /// information and the identifier. |
1793 | /// |
1794 | /// When the declarator is fully formed, this is turned into the appropriate |
1795 | /// Decl object. |
1796 | /// |
1797 | /// Declarators come in two types: normal declarators and abstract declarators. |
1798 | /// Abstract declarators are used when parsing types, and don't have an |
1799 | /// identifier. Normal declarators do have ID's. |
1800 | /// |
1801 | /// Instances of this class should be a transient object that lives on the |
1802 | /// stack, not objects that are allocated in large quantities on the heap. |
1803 | class Declarator { |
1804 | |
1805 | private: |
1806 | const DeclSpec &DS; |
1807 | CXXScopeSpec SS; |
1808 | UnqualifiedId Name; |
1809 | SourceRange Range; |
1810 | |
1811 | /// Where we are parsing this declarator. |
1812 | DeclaratorContext Context; |
1813 | |
1814 | /// The C++17 structured binding, if any. This is an alternative to a Name. |
1815 | DecompositionDeclarator BindingGroup; |
1816 | |
1817 | /// DeclTypeInfo - This holds each type that the declarator includes as it is |
1818 | /// parsed. This is pushed from the identifier out, which means that element |
1819 | /// #0 will be the most closely bound to the identifier, and |
1820 | /// DeclTypeInfo.back() will be the least closely bound. |
1821 | SmallVector<DeclaratorChunk, 8> DeclTypeInfo; |
1822 | |
1823 | /// InvalidType - Set by Sema::GetTypeForDeclarator(). |
1824 | unsigned InvalidType : 1; |
1825 | |
1826 | /// GroupingParens - Set by Parser::ParseParenDeclarator(). |
1827 | unsigned GroupingParens : 1; |
1828 | |
1829 | /// FunctionDefinition - Is this Declarator for a function or member |
1830 | /// definition and, if so, what kind? |
1831 | /// |
1832 | /// Actually a FunctionDefinitionKind. |
1833 | unsigned FunctionDefinition : 2; |
1834 | |
1835 | /// Is this Declarator a redeclaration? |
1836 | unsigned Redeclaration : 1; |
1837 | |
1838 | /// true if the declaration is preceded by \c __extension__. |
1839 | unsigned Extension : 1; |
1840 | |
1841 | /// Indicates whether this is an Objective-C instance variable. |
1842 | unsigned ObjCIvar : 1; |
1843 | |
1844 | /// Indicates whether this is an Objective-C 'weak' property. |
1845 | unsigned ObjCWeakProperty : 1; |
1846 | |
1847 | /// Indicates whether the InlineParams / InlineBindings storage has been used. |
1848 | unsigned InlineStorageUsed : 1; |
1849 | |
1850 | /// Indicates whether this declarator has an initializer. |
1851 | unsigned HasInitializer : 1; |
1852 | |
1853 | /// Attrs - Attributes. |
1854 | ParsedAttributes Attrs; |
1855 | |
1856 | /// The asm label, if specified. |
1857 | Expr *AsmLabel; |
1858 | |
1859 | /// \brief The constraint-expression specified by the trailing |
1860 | /// requires-clause, or null if no such clause was specified. |
1861 | Expr *TrailingRequiresClause; |
1862 | |
1863 | /// If this declarator declares a template, its template parameter lists. |
1864 | ArrayRef<TemplateParameterList *> TemplateParameterLists; |
1865 | |
1866 | /// If the declarator declares an abbreviated function template, the innermost |
1867 | /// template parameter list containing the invented and explicit template |
1868 | /// parameters (if any). |
1869 | TemplateParameterList *InventedTemplateParameterList; |
1870 | |
1871 | #ifndef _MSC_VER |
1872 | union { |
1873 | #endif |
1874 | /// InlineParams - This is a local array used for the first function decl |
1875 | /// chunk to avoid going to the heap for the common case when we have one |
1876 | /// function chunk in the declarator. |
1877 | DeclaratorChunk::ParamInfo InlineParams[16]; |
1878 | DecompositionDeclarator::Binding InlineBindings[16]; |
1879 | #ifndef _MSC_VER |
1880 | }; |
1881 | #endif |
1882 | |
1883 | /// If this is the second or subsequent declarator in this declaration, |
1884 | /// the location of the comma before this declarator. |
1885 | SourceLocation CommaLoc; |
1886 | |
1887 | /// If provided, the source location of the ellipsis used to describe |
1888 | /// this declarator as a parameter pack. |
1889 | SourceLocation EllipsisLoc; |
1890 | |
1891 | friend struct DeclaratorChunk; |
1892 | |
1893 | public: |
1894 | Declarator(const DeclSpec &ds, DeclaratorContext C) |
1895 | : DS(ds), Range(ds.getSourceRange()), Context(C), |
1896 | InvalidType(DS.getTypeSpecType() == DeclSpec::TST_error), |
1897 | GroupingParens(false), FunctionDefinition(static_cast<unsigned>( |
1898 | FunctionDefinitionKind::Declaration)), |
1899 | Redeclaration(false), Extension(false), ObjCIvar(false), |
1900 | ObjCWeakProperty(false), InlineStorageUsed(false), |
1901 | HasInitializer(false), Attrs(ds.getAttributePool().getFactory()), |
1902 | AsmLabel(nullptr), TrailingRequiresClause(nullptr), |
1903 | InventedTemplateParameterList(nullptr) {} |
1904 | |
1905 | ~Declarator() { |
1906 | clear(); |
1907 | } |
1908 | /// getDeclSpec - Return the declaration-specifier that this declarator was |
1909 | /// declared with. |
1910 | const DeclSpec &getDeclSpec() const { return DS; } |
1911 | |
1912 | /// getMutableDeclSpec - Return a non-const version of the DeclSpec. This |
1913 | /// should be used with extreme care: declspecs can often be shared between |
1914 | /// multiple declarators, so mutating the DeclSpec affects all of the |
1915 | /// Declarators. This should only be done when the declspec is known to not |
1916 | /// be shared or when in error recovery etc. |
1917 | DeclSpec &getMutableDeclSpec() { return const_cast<DeclSpec &>(DS); } |
1918 | |
1919 | AttributePool &getAttributePool() const { |
1920 | return Attrs.getPool(); |
1921 | } |
1922 | |
1923 | /// getCXXScopeSpec - Return the C++ scope specifier (global scope or |
1924 | /// nested-name-specifier) that is part of the declarator-id. |
1925 | const CXXScopeSpec &getCXXScopeSpec() const { return SS; } |
1926 | CXXScopeSpec &getCXXScopeSpec() { return SS; } |
1927 | |
1928 | /// Retrieve the name specified by this declarator. |
1929 | UnqualifiedId &getName() { return Name; } |
1930 | |
1931 | const DecompositionDeclarator &getDecompositionDeclarator() const { |
1932 | return BindingGroup; |
1933 | } |
1934 | |
1935 | DeclaratorContext getContext() const { return Context; } |
1936 | |
1937 | bool isPrototypeContext() const { |
1938 | return (Context == DeclaratorContext::Prototype || |
1939 | Context == DeclaratorContext::ObjCParameter || |
1940 | Context == DeclaratorContext::ObjCResult || |
1941 | Context == DeclaratorContext::LambdaExprParameter); |
1942 | } |
1943 | |
1944 | /// Get the source range that spans this declarator. |
1945 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
1946 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
1947 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
1948 | |
1949 | void SetSourceRange(SourceRange R) { Range = R; } |
1950 | /// SetRangeBegin - Set the start of the source range to Loc, unless it's |
1951 | /// invalid. |
1952 | void SetRangeBegin(SourceLocation Loc) { |
1953 | if (!Loc.isInvalid()) |
1954 | Range.setBegin(Loc); |
1955 | } |
1956 | /// SetRangeEnd - Set the end of the source range to Loc, unless it's invalid. |
1957 | void SetRangeEnd(SourceLocation Loc) { |
1958 | if (!Loc.isInvalid()) |
1959 | Range.setEnd(Loc); |
1960 | } |
1961 | /// ExtendWithDeclSpec - Extend the declarator source range to include the |
1962 | /// given declspec, unless its location is invalid. Adopts the range start if |
1963 | /// the current range start is invalid. |
1964 | void ExtendWithDeclSpec(const DeclSpec &DS) { |
1965 | SourceRange SR = DS.getSourceRange(); |
1966 | if (Range.getBegin().isInvalid()) |
1967 | Range.setBegin(SR.getBegin()); |
1968 | if (!SR.getEnd().isInvalid()) |
1969 | Range.setEnd(SR.getEnd()); |
1970 | } |
1971 | |
1972 | /// Reset the contents of this Declarator. |
1973 | void clear() { |
1974 | SS.clear(); |
1975 | Name.clear(); |
1976 | Range = DS.getSourceRange(); |
1977 | BindingGroup.clear(); |
1978 | |
1979 | for (unsigned i = 0, e = DeclTypeInfo.size(); i != e; ++i) |
1980 | DeclTypeInfo[i].destroy(); |
1981 | DeclTypeInfo.clear(); |
1982 | Attrs.clear(); |
1983 | AsmLabel = nullptr; |
1984 | InlineStorageUsed = false; |
1985 | HasInitializer = false; |
1986 | ObjCIvar = false; |
1987 | ObjCWeakProperty = false; |
1988 | CommaLoc = SourceLocation(); |
1989 | EllipsisLoc = SourceLocation(); |
1990 | } |
1991 | |
1992 | /// mayOmitIdentifier - Return true if the identifier is either optional or |
1993 | /// not allowed. This is true for typenames, prototypes, and template |
1994 | /// parameter lists. |
1995 | bool mayOmitIdentifier() const { |
1996 | switch (Context) { |
1997 | case DeclaratorContext::File: |
1998 | case DeclaratorContext::KNRTypeList: |
1999 | case DeclaratorContext::Member: |
2000 | case DeclaratorContext::Block: |
2001 | case DeclaratorContext::ForInit: |
2002 | case DeclaratorContext::SelectionInit: |
2003 | case DeclaratorContext::Condition: |
2004 | return false; |
2005 | |
2006 | case DeclaratorContext::TypeName: |
2007 | case DeclaratorContext::FunctionalCast: |
2008 | case DeclaratorContext::AliasDecl: |
2009 | case DeclaratorContext::AliasTemplate: |
2010 | case DeclaratorContext::Prototype: |
2011 | case DeclaratorContext::LambdaExprParameter: |
2012 | case DeclaratorContext::ObjCParameter: |
2013 | case DeclaratorContext::ObjCResult: |
2014 | case DeclaratorContext::TemplateParam: |
2015 | case DeclaratorContext::CXXNew: |
2016 | case DeclaratorContext::CXXCatch: |
2017 | case DeclaratorContext::ObjCCatch: |
2018 | case DeclaratorContext::BlockLiteral: |
2019 | case DeclaratorContext::LambdaExpr: |
2020 | case DeclaratorContext::ConversionId: |
2021 | case DeclaratorContext::TemplateArg: |
2022 | case DeclaratorContext::TemplateTypeArg: |
2023 | case DeclaratorContext::TrailingReturn: |
2024 | case DeclaratorContext::TrailingReturnVar: |
2025 | case DeclaratorContext::RequiresExpr: |
2026 | return true; |
2027 | } |
2028 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2028); |
2029 | } |
2030 | |
2031 | /// mayHaveIdentifier - Return true if the identifier is either optional or |
2032 | /// required. This is true for normal declarators and prototypes, but not |
2033 | /// typenames. |
2034 | bool mayHaveIdentifier() const { |
2035 | switch (Context) { |
2036 | case DeclaratorContext::File: |
2037 | case DeclaratorContext::KNRTypeList: |
2038 | case DeclaratorContext::Member: |
2039 | case DeclaratorContext::Block: |
2040 | case DeclaratorContext::ForInit: |
2041 | case DeclaratorContext::SelectionInit: |
2042 | case DeclaratorContext::Condition: |
2043 | case DeclaratorContext::Prototype: |
2044 | case DeclaratorContext::LambdaExprParameter: |
2045 | case DeclaratorContext::TemplateParam: |
2046 | case DeclaratorContext::CXXCatch: |
2047 | case DeclaratorContext::ObjCCatch: |
2048 | case DeclaratorContext::RequiresExpr: |
2049 | return true; |
2050 | |
2051 | case DeclaratorContext::TypeName: |
2052 | case DeclaratorContext::FunctionalCast: |
2053 | case DeclaratorContext::CXXNew: |
2054 | case DeclaratorContext::AliasDecl: |
2055 | case DeclaratorContext::AliasTemplate: |
2056 | case DeclaratorContext::ObjCParameter: |
2057 | case DeclaratorContext::ObjCResult: |
2058 | case DeclaratorContext::BlockLiteral: |
2059 | case DeclaratorContext::LambdaExpr: |
2060 | case DeclaratorContext::ConversionId: |
2061 | case DeclaratorContext::TemplateArg: |
2062 | case DeclaratorContext::TemplateTypeArg: |
2063 | case DeclaratorContext::TrailingReturn: |
2064 | case DeclaratorContext::TrailingReturnVar: |
2065 | return false; |
2066 | } |
2067 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2067); |
2068 | } |
2069 | |
2070 | /// Return true if the context permits a C++17 decomposition declarator. |
2071 | bool mayHaveDecompositionDeclarator() const { |
2072 | switch (Context) { |
2073 | case DeclaratorContext::File: |
2074 | // FIXME: It's not clear that the proposal meant to allow file-scope |
2075 | // structured bindings, but it does. |
2076 | case DeclaratorContext::Block: |
2077 | case DeclaratorContext::ForInit: |
2078 | case DeclaratorContext::SelectionInit: |
2079 | case DeclaratorContext::Condition: |
2080 | return true; |
2081 | |
2082 | case DeclaratorContext::Member: |
2083 | case DeclaratorContext::Prototype: |
2084 | case DeclaratorContext::TemplateParam: |
2085 | case DeclaratorContext::RequiresExpr: |
2086 | // Maybe one day... |
2087 | return false; |
2088 | |
2089 | // These contexts don't allow any kind of non-abstract declarator. |
2090 | case DeclaratorContext::KNRTypeList: |
2091 | case DeclaratorContext::TypeName: |
2092 | case DeclaratorContext::FunctionalCast: |
2093 | case DeclaratorContext::AliasDecl: |
2094 | case DeclaratorContext::AliasTemplate: |
2095 | case DeclaratorContext::LambdaExprParameter: |
2096 | case DeclaratorContext::ObjCParameter: |
2097 | case DeclaratorContext::ObjCResult: |
2098 | case DeclaratorContext::CXXNew: |
2099 | case DeclaratorContext::CXXCatch: |
2100 | case DeclaratorContext::ObjCCatch: |
2101 | case DeclaratorContext::BlockLiteral: |
2102 | case DeclaratorContext::LambdaExpr: |
2103 | case DeclaratorContext::ConversionId: |
2104 | case DeclaratorContext::TemplateArg: |
2105 | case DeclaratorContext::TemplateTypeArg: |
2106 | case DeclaratorContext::TrailingReturn: |
2107 | case DeclaratorContext::TrailingReturnVar: |
2108 | return false; |
2109 | } |
2110 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2110); |
2111 | } |
2112 | |
2113 | /// mayBeFollowedByCXXDirectInit - Return true if the declarator can be |
2114 | /// followed by a C++ direct initializer, e.g. "int x(1);". |
2115 | bool mayBeFollowedByCXXDirectInit() const { |
2116 | if (hasGroupingParens()) return false; |
2117 | |
2118 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
2119 | return false; |
2120 | |
2121 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern && |
2122 | Context != DeclaratorContext::File) |
2123 | return false; |
2124 | |
2125 | // Special names can't have direct initializers. |
2126 | if (Name.getKind() != UnqualifiedIdKind::IK_Identifier) |
2127 | return false; |
2128 | |
2129 | switch (Context) { |
2130 | case DeclaratorContext::File: |
2131 | case DeclaratorContext::Block: |
2132 | case DeclaratorContext::ForInit: |
2133 | case DeclaratorContext::SelectionInit: |
2134 | case DeclaratorContext::TrailingReturnVar: |
2135 | return true; |
2136 | |
2137 | case DeclaratorContext::Condition: |
2138 | // This may not be followed by a direct initializer, but it can't be a |
2139 | // function declaration either, and we'd prefer to perform a tentative |
2140 | // parse in order to produce the right diagnostic. |
2141 | return true; |
2142 | |
2143 | case DeclaratorContext::KNRTypeList: |
2144 | case DeclaratorContext::Member: |
2145 | case DeclaratorContext::Prototype: |
2146 | case DeclaratorContext::LambdaExprParameter: |
2147 | case DeclaratorContext::ObjCParameter: |
2148 | case DeclaratorContext::ObjCResult: |
2149 | case DeclaratorContext::TemplateParam: |
2150 | case DeclaratorContext::CXXCatch: |
2151 | case DeclaratorContext::ObjCCatch: |
2152 | case DeclaratorContext::TypeName: |
2153 | case DeclaratorContext::FunctionalCast: // FIXME |
2154 | case DeclaratorContext::CXXNew: |
2155 | case DeclaratorContext::AliasDecl: |
2156 | case DeclaratorContext::AliasTemplate: |
2157 | case DeclaratorContext::BlockLiteral: |
2158 | case DeclaratorContext::LambdaExpr: |
2159 | case DeclaratorContext::ConversionId: |
2160 | case DeclaratorContext::TemplateArg: |
2161 | case DeclaratorContext::TemplateTypeArg: |
2162 | case DeclaratorContext::TrailingReturn: |
2163 | case DeclaratorContext::RequiresExpr: |
2164 | return false; |
2165 | } |
2166 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2166); |
2167 | } |
2168 | |
2169 | /// isPastIdentifier - Return true if we have parsed beyond the point where |
2170 | /// the name would appear. (This may happen even if we haven't actually parsed |
2171 | /// a name, perhaps because this context doesn't require one.) |
2172 | bool isPastIdentifier() const { return Name.isValid(); } |
2173 | |
2174 | /// hasName - Whether this declarator has a name, which might be an |
2175 | /// identifier (accessible via getIdentifier()) or some kind of |
2176 | /// special C++ name (constructor, destructor, etc.), or a structured |
2177 | /// binding (which is not exactly a name, but occupies the same position). |
2178 | bool hasName() const { |
2179 | return Name.getKind() != UnqualifiedIdKind::IK_Identifier || |
2180 | Name.Identifier || isDecompositionDeclarator(); |
2181 | } |
2182 | |
2183 | /// Return whether this declarator is a decomposition declarator. |
2184 | bool isDecompositionDeclarator() const { |
2185 | return BindingGroup.isSet(); |
2186 | } |
2187 | |
2188 | IdentifierInfo *getIdentifier() const { |
2189 | if (Name.getKind() == UnqualifiedIdKind::IK_Identifier) |
2190 | return Name.Identifier; |
2191 | |
2192 | return nullptr; |
2193 | } |
2194 | SourceLocation getIdentifierLoc() const { return Name.StartLocation; } |
2195 | |
2196 | /// Set the name of this declarator to be the given identifier. |
2197 | void SetIdentifier(IdentifierInfo *Id, SourceLocation IdLoc) { |
2198 | Name.setIdentifier(Id, IdLoc); |
2199 | } |
2200 | |
2201 | /// Set the decomposition bindings for this declarator. |
2202 | void |
2203 | setDecompositionBindings(SourceLocation LSquareLoc, |
2204 | ArrayRef<DecompositionDeclarator::Binding> Bindings, |
2205 | SourceLocation RSquareLoc); |
2206 | |
2207 | /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to |
2208 | /// EndLoc, which should be the last token of the chunk. |
2209 | /// This function takes attrs by R-Value reference because it takes ownership |
2210 | /// of those attributes from the parameter. |
2211 | void AddTypeInfo(const DeclaratorChunk &TI, ParsedAttributes &&attrs, |
2212 | SourceLocation EndLoc) { |
2213 | DeclTypeInfo.push_back(TI); |
2214 | DeclTypeInfo.back().getAttrs().addAll(attrs.begin(), attrs.end()); |
2215 | getAttributePool().takeAllFrom(attrs.getPool()); |
2216 | |
2217 | if (!EndLoc.isInvalid()) |
2218 | SetRangeEnd(EndLoc); |
2219 | } |
2220 | |
2221 | /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to |
2222 | /// EndLoc, which should be the last token of the chunk. |
2223 | void AddTypeInfo(const DeclaratorChunk &TI, SourceLocation EndLoc) { |
2224 | DeclTypeInfo.push_back(TI); |
2225 | |
2226 | if (!EndLoc.isInvalid()) |
2227 | SetRangeEnd(EndLoc); |
2228 | } |
2229 | |
2230 | /// Add a new innermost chunk to this declarator. |
2231 | void AddInnermostTypeInfo(const DeclaratorChunk &TI) { |
2232 | DeclTypeInfo.insert(DeclTypeInfo.begin(), TI); |
2233 | } |
2234 | |
2235 | /// Return the number of types applied to this declarator. |
2236 | unsigned getNumTypeObjects() const { return DeclTypeInfo.size(); } |
2237 | |
2238 | /// Return the specified TypeInfo from this declarator. TypeInfo #0 is |
2239 | /// closest to the identifier. |
2240 | const DeclaratorChunk &getTypeObject(unsigned i) const { |
2241 | assert(i < DeclTypeInfo.size() && "Invalid type chunk")(static_cast <bool> (i < DeclTypeInfo.size() && "Invalid type chunk") ? void (0) : __assert_fail ("i < DeclTypeInfo.size() && \"Invalid type chunk\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2241, __extension__ __PRETTY_FUNCTION__)); |
2242 | return DeclTypeInfo[i]; |
2243 | } |
2244 | DeclaratorChunk &getTypeObject(unsigned i) { |
2245 | assert(i < DeclTypeInfo.size() && "Invalid type chunk")(static_cast <bool> (i < DeclTypeInfo.size() && "Invalid type chunk") ? void (0) : __assert_fail ("i < DeclTypeInfo.size() && \"Invalid type chunk\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2245, __extension__ __PRETTY_FUNCTION__)); |
2246 | return DeclTypeInfo[i]; |
2247 | } |
2248 | |
2249 | typedef SmallVectorImpl<DeclaratorChunk>::const_iterator type_object_iterator; |
2250 | typedef llvm::iterator_range<type_object_iterator> type_object_range; |
2251 | |
2252 | /// Returns the range of type objects, from the identifier outwards. |
2253 | type_object_range type_objects() const { |
2254 | return type_object_range(DeclTypeInfo.begin(), DeclTypeInfo.end()); |
2255 | } |
2256 | |
2257 | void DropFirstTypeObject() { |
2258 | assert(!DeclTypeInfo.empty() && "No type chunks to drop.")(static_cast <bool> (!DeclTypeInfo.empty() && "No type chunks to drop." ) ? void (0) : __assert_fail ("!DeclTypeInfo.empty() && \"No type chunks to drop.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2258, __extension__ __PRETTY_FUNCTION__)); |
2259 | DeclTypeInfo.front().destroy(); |
2260 | DeclTypeInfo.erase(DeclTypeInfo.begin()); |
2261 | } |
2262 | |
2263 | /// Return the innermost (closest to the declarator) chunk of this |
2264 | /// declarator that is not a parens chunk, or null if there are no |
2265 | /// non-parens chunks. |
2266 | const DeclaratorChunk *getInnermostNonParenChunk() const { |
2267 | for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) { |
2268 | if (!DeclTypeInfo[i].isParen()) |
2269 | return &DeclTypeInfo[i]; |
2270 | } |
2271 | return nullptr; |
2272 | } |
2273 | |
2274 | /// Return the outermost (furthest from the declarator) chunk of |
2275 | /// this declarator that is not a parens chunk, or null if there are |
2276 | /// no non-parens chunks. |
2277 | const DeclaratorChunk *getOutermostNonParenChunk() const { |
2278 | for (unsigned i = DeclTypeInfo.size(), i_end = 0; i != i_end; --i) { |
2279 | if (!DeclTypeInfo[i-1].isParen()) |
2280 | return &DeclTypeInfo[i-1]; |
2281 | } |
2282 | return nullptr; |
2283 | } |
2284 | |
2285 | /// isArrayOfUnknownBound - This method returns true if the declarator |
2286 | /// is a declarator for an array of unknown bound (looking through |
2287 | /// parentheses). |
2288 | bool isArrayOfUnknownBound() const { |
2289 | const DeclaratorChunk *chunk = getInnermostNonParenChunk(); |
2290 | return (chunk && chunk->Kind == DeclaratorChunk::Array && |
2291 | !chunk->Arr.NumElts); |
2292 | } |
2293 | |
2294 | /// isFunctionDeclarator - This method returns true if the declarator |
2295 | /// is a function declarator (looking through parentheses). |
2296 | /// If true is returned, then the reference type parameter idx is |
2297 | /// assigned with the index of the declaration chunk. |
2298 | bool isFunctionDeclarator(unsigned& idx) const { |
2299 | for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) { |
2300 | switch (DeclTypeInfo[i].Kind) { |
2301 | case DeclaratorChunk::Function: |
2302 | idx = i; |
2303 | return true; |
2304 | case DeclaratorChunk::Paren: |
2305 | continue; |
2306 | case DeclaratorChunk::Pointer: |
2307 | case DeclaratorChunk::Reference: |
2308 | case DeclaratorChunk::Array: |
2309 | case DeclaratorChunk::BlockPointer: |
2310 | case DeclaratorChunk::MemberPointer: |
2311 | case DeclaratorChunk::Pipe: |
2312 | return false; |
2313 | } |
2314 | llvm_unreachable("Invalid type chunk")::llvm::llvm_unreachable_internal("Invalid type chunk", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2314); |
2315 | } |
2316 | return false; |
2317 | } |
2318 | |
2319 | /// isFunctionDeclarator - Once this declarator is fully parsed and formed, |
2320 | /// this method returns true if the identifier is a function declarator |
2321 | /// (looking through parentheses). |
2322 | bool isFunctionDeclarator() const { |
2323 | unsigned index; |
2324 | return isFunctionDeclarator(index); |
2325 | } |
2326 | |
2327 | /// getFunctionTypeInfo - Retrieves the function type info object |
2328 | /// (looking through parentheses). |
2329 | DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() { |
2330 | assert(isFunctionDeclarator() && "Not a function declarator!")(static_cast <bool> (isFunctionDeclarator() && "Not a function declarator!" ) ? void (0) : __assert_fail ("isFunctionDeclarator() && \"Not a function declarator!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2330, __extension__ __PRETTY_FUNCTION__)); |
2331 | unsigned index = 0; |
2332 | isFunctionDeclarator(index); |
2333 | return DeclTypeInfo[index].Fun; |
2334 | } |
2335 | |
2336 | /// getFunctionTypeInfo - Retrieves the function type info object |
2337 | /// (looking through parentheses). |
2338 | const DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() const { |
2339 | return const_cast<Declarator*>(this)->getFunctionTypeInfo(); |
2340 | } |
2341 | |
2342 | /// Determine whether the declaration that will be produced from |
2343 | /// this declaration will be a function. |
2344 | /// |
2345 | /// A declaration can declare a function even if the declarator itself |
2346 | /// isn't a function declarator, if the type specifier refers to a function |
2347 | /// type. This routine checks for both cases. |
2348 | bool isDeclarationOfFunction() const; |
2349 | |
2350 | /// Return true if this declaration appears in a context where a |
2351 | /// function declarator would be a function declaration. |
2352 | bool isFunctionDeclarationContext() const { |
2353 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
2354 | return false; |
2355 | |
2356 | switch (Context) { |
2357 | case DeclaratorContext::File: |
2358 | case DeclaratorContext::Member: |
2359 | case DeclaratorContext::Block: |
2360 | case DeclaratorContext::ForInit: |
2361 | case DeclaratorContext::SelectionInit: |
2362 | return true; |
2363 | |
2364 | case DeclaratorContext::Condition: |
2365 | case DeclaratorContext::KNRTypeList: |
2366 | case DeclaratorContext::TypeName: |
2367 | case DeclaratorContext::FunctionalCast: |
2368 | case DeclaratorContext::AliasDecl: |
2369 | case DeclaratorContext::AliasTemplate: |
2370 | case DeclaratorContext::Prototype: |
2371 | case DeclaratorContext::LambdaExprParameter: |
2372 | case DeclaratorContext::ObjCParameter: |
2373 | case DeclaratorContext::ObjCResult: |
2374 | case DeclaratorContext::TemplateParam: |
2375 | case DeclaratorContext::CXXNew: |
2376 | case DeclaratorContext::CXXCatch: |
2377 | case DeclaratorContext::ObjCCatch: |
2378 | case DeclaratorContext::BlockLiteral: |
2379 | case DeclaratorContext::LambdaExpr: |
2380 | case DeclaratorContext::ConversionId: |
2381 | case DeclaratorContext::TemplateArg: |
2382 | case DeclaratorContext::TemplateTypeArg: |
2383 | case DeclaratorContext::TrailingReturn: |
2384 | case DeclaratorContext::TrailingReturnVar: |
2385 | case DeclaratorContext::RequiresExpr: |
2386 | return false; |
2387 | } |
2388 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2388); |
2389 | } |
2390 | |
2391 | /// Determine whether this declaration appears in a context where an |
2392 | /// expression could appear. |
2393 | bool isExpressionContext() const { |
2394 | switch (Context) { |
2395 | case DeclaratorContext::File: |
2396 | case DeclaratorContext::KNRTypeList: |
2397 | case DeclaratorContext::Member: |
2398 | |
2399 | // FIXME: sizeof(...) permits an expression. |
2400 | case DeclaratorContext::TypeName: |
2401 | |
2402 | case DeclaratorContext::FunctionalCast: |
2403 | case DeclaratorContext::AliasDecl: |
2404 | case DeclaratorContext::AliasTemplate: |
2405 | case DeclaratorContext::Prototype: |
2406 | case DeclaratorContext::LambdaExprParameter: |
2407 | case DeclaratorContext::ObjCParameter: |
2408 | case DeclaratorContext::ObjCResult: |
2409 | case DeclaratorContext::TemplateParam: |
2410 | case DeclaratorContext::CXXNew: |
2411 | case DeclaratorContext::CXXCatch: |
2412 | case DeclaratorContext::ObjCCatch: |
2413 | case DeclaratorContext::BlockLiteral: |
2414 | case DeclaratorContext::LambdaExpr: |
2415 | case DeclaratorContext::ConversionId: |
2416 | case DeclaratorContext::TrailingReturn: |
2417 | case DeclaratorContext::TrailingReturnVar: |
2418 | case DeclaratorContext::TemplateTypeArg: |
2419 | case DeclaratorContext::RequiresExpr: |
2420 | return false; |
2421 | |
2422 | case DeclaratorContext::Block: |
2423 | case DeclaratorContext::ForInit: |
2424 | case DeclaratorContext::SelectionInit: |
2425 | case DeclaratorContext::Condition: |
2426 | case DeclaratorContext::TemplateArg: |
2427 | return true; |
2428 | } |
2429 | |
2430 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/Sema/DeclSpec.h" , 2430); |
2431 | } |
2432 | |
2433 | /// Return true if a function declarator at this position would be a |
2434 | /// function declaration. |
2435 | bool isFunctionDeclaratorAFunctionDeclaration() const { |
2436 | if (!isFunctionDeclarationContext()) |
2437 | return false; |
2438 | |
2439 | for (unsigned I = 0, N = getNumTypeObjects(); I != N; ++I) |
2440 | if (getTypeObject(I).Kind != DeclaratorChunk::Paren) |
2441 | return false; |
2442 | |
2443 | return true; |
2444 | } |
2445 | |
2446 | /// Determine whether a trailing return type was written (at any |
2447 | /// level) within this declarator. |
2448 | bool hasTrailingReturnType() const { |
2449 | for (const auto &Chunk : type_objects()) |
2450 | if (Chunk.Kind == DeclaratorChunk::Function && |
2451 | Chunk.Fun.hasTrailingReturnType()) |
2452 | return true; |
2453 | return false; |
2454 | } |
2455 | /// Get the trailing return type appearing (at any level) within this |
2456 | /// declarator. |
2457 | ParsedType getTrailingReturnType() const { |
2458 | for (const auto &Chunk : type_objects()) |
2459 | if (Chunk.Kind == DeclaratorChunk::Function && |
2460 | Chunk.Fun.hasTrailingReturnType()) |
2461 | return Chunk.Fun.getTrailingReturnType(); |
2462 | return ParsedType(); |
2463 | } |
2464 | |
2465 | /// \brief Sets a trailing requires clause for this declarator. |
2466 | void setTrailingRequiresClause(Expr *TRC) { |
2467 | TrailingRequiresClause = TRC; |
2468 | |
2469 | SetRangeEnd(TRC->getEndLoc()); |
2470 | } |
2471 | |
2472 | /// \brief Sets a trailing requires clause for this declarator. |
2473 | Expr *getTrailingRequiresClause() { |
2474 | return TrailingRequiresClause; |
2475 | } |
2476 | |
2477 | /// \brief Determine whether a trailing requires clause was written in this |
2478 | /// declarator. |
2479 | bool hasTrailingRequiresClause() const { |
2480 | return TrailingRequiresClause != nullptr; |
2481 | } |
2482 | |
2483 | /// Sets the template parameter lists that preceded the declarator. |
2484 | void setTemplateParameterLists(ArrayRef<TemplateParameterList *> TPLs) { |
2485 | TemplateParameterLists = TPLs; |
2486 | } |
2487 | |
2488 | /// The template parameter lists that preceded the declarator. |
2489 | ArrayRef<TemplateParameterList *> getTemplateParameterLists() const { |
2490 | return TemplateParameterLists; |
2491 | } |
2492 | |
2493 | /// Sets the template parameter list generated from the explicit template |
2494 | /// parameters along with any invented template parameters from |
2495 | /// placeholder-typed parameters. |
2496 | void setInventedTemplateParameterList(TemplateParameterList *Invented) { |
2497 | InventedTemplateParameterList = Invented; |
2498 | } |
2499 | |
2500 | /// The template parameter list generated from the explicit template |
2501 | /// parameters along with any invented template parameters from |
2502 | /// placeholder-typed parameters, if there were any such parameters. |
2503 | TemplateParameterList * getInventedTemplateParameterList() const { |
2504 | return InventedTemplateParameterList; |
2505 | } |
2506 | |
2507 | /// takeAttributes - Takes attributes from the given parsed-attributes |
2508 | /// set and add them to this declarator. |
2509 | /// |
2510 | /// These examples both add 3 attributes to "var": |
2511 | /// short int var __attribute__((aligned(16),common,deprecated)); |
2512 | /// short int x, __attribute__((aligned(16)) var |
2513 | /// __attribute__((common,deprecated)); |
2514 | /// |
2515 | /// Also extends the range of the declarator. |
2516 | void takeAttributes(ParsedAttributes &attrs, SourceLocation lastLoc) { |
2517 | Attrs.takeAllFrom(attrs); |
2518 | |
2519 | if (!lastLoc.isInvalid()) |
2520 | SetRangeEnd(lastLoc); |
2521 | } |
2522 | |
2523 | const ParsedAttributes &getAttributes() const { return Attrs; } |
2524 | ParsedAttributes &getAttributes() { return Attrs; } |
2525 | |
2526 | /// hasAttributes - do we contain any attributes? |
2527 | bool hasAttributes() const { |
2528 | if (!getAttributes().empty() || getDeclSpec().hasAttributes()) |
2529 | return true; |
2530 | for (unsigned i = 0, e = getNumTypeObjects(); i != e; ++i) |
2531 | if (!getTypeObject(i).getAttrs().empty()) |
2532 | return true; |
2533 | return false; |
2534 | } |
2535 | |
2536 | /// Return a source range list of C++11 attributes associated |
2537 | /// with the declarator. |
2538 | void getCXX11AttributeRanges(SmallVectorImpl<SourceRange> &Ranges) { |
2539 | for (const ParsedAttr &AL : Attrs) |
2540 | if (AL.isCXX11Attribute()) |
2541 | Ranges.push_back(AL.getRange()); |
2542 | } |
2543 | |
2544 | void setAsmLabel(Expr *E) { AsmLabel = E; } |
2545 | Expr *getAsmLabel() const { return AsmLabel; } |
2546 | |
2547 | void setExtension(bool Val = true) { Extension = Val; } |
2548 | bool getExtension() const { return Extension; } |
2549 | |
2550 | void setObjCIvar(bool Val = true) { ObjCIvar = Val; } |
2551 | bool isObjCIvar() const { return ObjCIvar; } |
2552 | |
2553 | void setObjCWeakProperty(bool Val = true) { ObjCWeakProperty = Val; } |
2554 | bool isObjCWeakProperty() const { return ObjCWeakProperty; } |
2555 | |
2556 | void setInvalidType(bool Val = true) { InvalidType = Val; } |
2557 | bool isInvalidType() const { |
2558 | return InvalidType || DS.getTypeSpecType() == DeclSpec::TST_error; |
2559 | } |
2560 | |
2561 | void setGroupingParens(bool flag) { GroupingParens = flag; } |
2562 | bool hasGroupingParens() const { return GroupingParens; } |
2563 | |
2564 | bool isFirstDeclarator() const { return !CommaLoc.isValid(); } |
2565 | SourceLocation getCommaLoc() const { return CommaLoc; } |
2566 | void setCommaLoc(SourceLocation CL) { CommaLoc = CL; } |
2567 | |
2568 | bool hasEllipsis() const { return EllipsisLoc.isValid(); } |
2569 | SourceLocation getEllipsisLoc() const { return EllipsisLoc; } |
2570 | void setEllipsisLoc(SourceLocation EL) { EllipsisLoc = EL; } |
2571 | |
2572 | void setFunctionDefinitionKind(FunctionDefinitionKind Val) { |
2573 | FunctionDefinition = static_cast<unsigned>(Val); |
2574 | } |
2575 | |
2576 | bool isFunctionDefinition() const { |
2577 | return getFunctionDefinitionKind() != FunctionDefinitionKind::Declaration; |
2578 | } |
2579 | |
2580 | FunctionDefinitionKind getFunctionDefinitionKind() const { |
2581 | return (FunctionDefinitionKind)FunctionDefinition; |
2582 | } |
2583 | |
2584 | void setHasInitializer(bool Val = true) { HasInitializer = Val; } |
2585 | bool hasInitializer() const { return HasInitializer; } |
2586 | |
2587 | /// Returns true if this declares a real member and not a friend. |
2588 | bool isFirstDeclarationOfMember() { |
2589 | return getContext() == DeclaratorContext::Member && |
2590 | !getDeclSpec().isFriendSpecified(); |
2591 | } |
2592 | |
2593 | /// Returns true if this declares a static member. This cannot be called on a |
2594 | /// declarator outside of a MemberContext because we won't know until |
2595 | /// redeclaration time if the decl is static. |
2596 | bool isStaticMember(); |
2597 | |
2598 | /// Returns true if this declares a constructor or a destructor. |
2599 | bool isCtorOrDtor(); |
2600 | |
2601 | void setRedeclaration(bool Val) { Redeclaration = Val; } |
2602 | bool isRedeclaration() const { return Redeclaration; } |
2603 | }; |
2604 | |
2605 | /// This little struct is used to capture information about |
2606 | /// structure field declarators, which is basically just a bitfield size. |
2607 | struct FieldDeclarator { |
2608 | Declarator D; |
2609 | Expr *BitfieldSize; |
2610 | explicit FieldDeclarator(const DeclSpec &DS) |
2611 | : D(DS, DeclaratorContext::Member), BitfieldSize(nullptr) {} |
2612 | }; |
2613 | |
2614 | /// Represents a C++11 virt-specifier-seq. |
2615 | class VirtSpecifiers { |
2616 | public: |
2617 | enum Specifier { |
2618 | VS_None = 0, |
2619 | VS_Override = 1, |
2620 | VS_Final = 2, |
2621 | VS_Sealed = 4, |
2622 | // Represents the __final keyword, which is legal for gcc in pre-C++11 mode. |
2623 | VS_GNU_Final = 8, |
2624 | VS_Abstract = 16 |
2625 | }; |
2626 | |
2627 | VirtSpecifiers() : Specifiers(0), LastSpecifier(VS_None) { } |
2628 | |
2629 | bool SetSpecifier(Specifier VS, SourceLocation Loc, |
2630 | const char *&PrevSpec); |
2631 | |
2632 | bool isUnset() const { return Specifiers == 0; } |
2633 | |
2634 | bool isOverrideSpecified() const { return Specifiers & VS_Override; } |
2635 | SourceLocation getOverrideLoc() const { return VS_overrideLoc; } |
2636 | |
2637 | bool isFinalSpecified() const { return Specifiers & (VS_Final | VS_Sealed | VS_GNU_Final); } |
2638 | bool isFinalSpelledSealed() const { return Specifiers & VS_Sealed; } |
2639 | SourceLocation getFinalLoc() const { return VS_finalLoc; } |
2640 | SourceLocation getAbstractLoc() const { return VS_abstractLoc; } |
2641 | |
2642 | void clear() { Specifiers = 0; } |
2643 | |
2644 | static const char *getSpecifierName(Specifier VS); |
2645 | |
2646 | SourceLocation getFirstLocation() const { return FirstLocation; } |
2647 | SourceLocation getLastLocation() const { return LastLocation; } |
2648 | Specifier getLastSpecifier() const { return LastSpecifier; } |
2649 | |
2650 | private: |
2651 | unsigned Specifiers; |
2652 | Specifier LastSpecifier; |
2653 | |
2654 | SourceLocation VS_overrideLoc, VS_finalLoc, VS_abstractLoc; |
2655 | SourceLocation FirstLocation; |
2656 | SourceLocation LastLocation; |
2657 | }; |
2658 | |
2659 | enum class LambdaCaptureInitKind { |
2660 | NoInit, //!< [a] |
2661 | CopyInit, //!< [a = b], [a = {b}] |
2662 | DirectInit, //!< [a(b)] |
2663 | ListInit //!< [a{b}] |
2664 | }; |
2665 | |
2666 | /// Represents a complete lambda introducer. |
2667 | struct LambdaIntroducer { |
2668 | /// An individual capture in a lambda introducer. |
2669 | struct LambdaCapture { |
2670 | LambdaCaptureKind Kind; |
2671 | SourceLocation Loc; |
2672 | IdentifierInfo *Id; |
2673 | SourceLocation EllipsisLoc; |
2674 | LambdaCaptureInitKind InitKind; |
2675 | ExprResult Init; |
2676 | ParsedType InitCaptureType; |
2677 | SourceRange ExplicitRange; |
2678 | |
2679 | LambdaCapture(LambdaCaptureKind Kind, SourceLocation Loc, |
2680 | IdentifierInfo *Id, SourceLocation EllipsisLoc, |
2681 | LambdaCaptureInitKind InitKind, ExprResult Init, |
2682 | ParsedType InitCaptureType, |
2683 | SourceRange ExplicitRange) |
2684 | : Kind(Kind), Loc(Loc), Id(Id), EllipsisLoc(EllipsisLoc), |
2685 | InitKind(InitKind), Init(Init), InitCaptureType(InitCaptureType), |
2686 | ExplicitRange(ExplicitRange) {} |
2687 | }; |
2688 | |
2689 | SourceRange Range; |
2690 | SourceLocation DefaultLoc; |
2691 | LambdaCaptureDefault Default; |
2692 | SmallVector<LambdaCapture, 4> Captures; |
2693 | |
2694 | LambdaIntroducer() |
2695 | : Default(LCD_None) {} |
2696 | |
2697 | /// Append a capture in a lambda introducer. |
2698 | void addCapture(LambdaCaptureKind Kind, |
2699 | SourceLocation Loc, |
2700 | IdentifierInfo* Id, |
2701 | SourceLocation EllipsisLoc, |
2702 | LambdaCaptureInitKind InitKind, |
2703 | ExprResult Init, |
2704 | ParsedType InitCaptureType, |
2705 | SourceRange ExplicitRange) { |
2706 | Captures.push_back(LambdaCapture(Kind, Loc, Id, EllipsisLoc, InitKind, Init, |
2707 | InitCaptureType, ExplicitRange)); |
2708 | } |
2709 | }; |
2710 | |
2711 | struct InventedTemplateParameterInfo { |
2712 | /// The number of parameters in the template parameter list that were |
2713 | /// explicitly specified by the user, as opposed to being invented by use |
2714 | /// of an auto parameter. |
2715 | unsigned NumExplicitTemplateParams = 0; |
2716 | |
2717 | /// If this is a generic lambda or abbreviated function template, use this |
2718 | /// as the depth of each 'auto' parameter, during initial AST construction. |
2719 | unsigned AutoTemplateParameterDepth = 0; |
2720 | |
2721 | /// Store the list of the template parameters for a generic lambda or an |
2722 | /// abbreviated function template. |
2723 | /// If this is a generic lambda or abbreviated function template, this holds |
2724 | /// the explicit template parameters followed by the auto parameters |
2725 | /// converted into TemplateTypeParmDecls. |
2726 | /// It can be used to construct the generic lambda or abbreviated template's |
2727 | /// template parameter list during initial AST construction. |
2728 | SmallVector<NamedDecl*, 4> TemplateParams; |
2729 | }; |
2730 | |
2731 | } // end namespace clang |
2732 | |
2733 | #endif // LLVM_CLANG_SEMA_DECLSPEC_H |
1 | //===- Type.h - C Language Family Type Representation -----------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | /// \file |
10 | /// C Language Family Type Representation |
11 | /// |
12 | /// This file defines the clang::Type interface and subclasses, used to |
13 | /// represent types for languages in the C family. |
14 | // |
15 | //===----------------------------------------------------------------------===// |
16 | |
17 | #ifndef LLVM_CLANG_AST_TYPE_H |
18 | #define LLVM_CLANG_AST_TYPE_H |
19 | |
20 | #include "clang/AST/DependenceFlags.h" |
21 | #include "clang/AST/NestedNameSpecifier.h" |
22 | #include "clang/AST/TemplateName.h" |
23 | #include "clang/Basic/AddressSpaces.h" |
24 | #include "clang/Basic/AttrKinds.h" |
25 | #include "clang/Basic/Diagnostic.h" |
26 | #include "clang/Basic/ExceptionSpecificationType.h" |
27 | #include "clang/Basic/LLVM.h" |
28 | #include "clang/Basic/Linkage.h" |
29 | #include "clang/Basic/PartialDiagnostic.h" |
30 | #include "clang/Basic/SourceLocation.h" |
31 | #include "clang/Basic/Specifiers.h" |
32 | #include "clang/Basic/Visibility.h" |
33 | #include "llvm/ADT/APInt.h" |
34 | #include "llvm/ADT/APSInt.h" |
35 | #include "llvm/ADT/ArrayRef.h" |
36 | #include "llvm/ADT/FoldingSet.h" |
37 | #include "llvm/ADT/None.h" |
38 | #include "llvm/ADT/Optional.h" |
39 | #include "llvm/ADT/PointerIntPair.h" |
40 | #include "llvm/ADT/PointerUnion.h" |
41 | #include "llvm/ADT/StringRef.h" |
42 | #include "llvm/ADT/Twine.h" |
43 | #include "llvm/ADT/iterator_range.h" |
44 | #include "llvm/Support/Casting.h" |
45 | #include "llvm/Support/Compiler.h" |
46 | #include "llvm/Support/ErrorHandling.h" |
47 | #include "llvm/Support/PointerLikeTypeTraits.h" |
48 | #include "llvm/Support/TrailingObjects.h" |
49 | #include "llvm/Support/type_traits.h" |
50 | #include <cassert> |
51 | #include <cstddef> |
52 | #include <cstdint> |
53 | #include <cstring> |
54 | #include <string> |
55 | #include <type_traits> |
56 | #include <utility> |
57 | |
58 | namespace clang { |
59 | |
60 | class ExtQuals; |
61 | class QualType; |
62 | class ConceptDecl; |
63 | class TagDecl; |
64 | class TemplateParameterList; |
65 | class Type; |
66 | |
67 | enum { |
68 | TypeAlignmentInBits = 4, |
69 | TypeAlignment = 1 << TypeAlignmentInBits |
70 | }; |
71 | |
72 | namespace serialization { |
73 | template <class T> class AbstractTypeReader; |
74 | template <class T> class AbstractTypeWriter; |
75 | } |
76 | |
77 | } // namespace clang |
78 | |
79 | namespace llvm { |
80 | |
81 | template <typename T> |
82 | struct PointerLikeTypeTraits; |
83 | template<> |
84 | struct PointerLikeTypeTraits< ::clang::Type*> { |
85 | static inline void *getAsVoidPointer(::clang::Type *P) { return P; } |
86 | |
87 | static inline ::clang::Type *getFromVoidPointer(void *P) { |
88 | return static_cast< ::clang::Type*>(P); |
89 | } |
90 | |
91 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; |
92 | }; |
93 | |
94 | template<> |
95 | struct PointerLikeTypeTraits< ::clang::ExtQuals*> { |
96 | static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } |
97 | |
98 | static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { |
99 | return static_cast< ::clang::ExtQuals*>(P); |
100 | } |
101 | |
102 | static constexpr int NumLowBitsAvailable = clang::TypeAlignmentInBits; |
103 | }; |
104 | |
105 | } // namespace llvm |
106 | |
107 | namespace clang { |
108 | |
109 | class ASTContext; |
110 | template <typename> class CanQual; |
111 | class CXXRecordDecl; |
112 | class DeclContext; |
113 | class EnumDecl; |
114 | class Expr; |
115 | class ExtQualsTypeCommonBase; |
116 | class FunctionDecl; |
117 | class IdentifierInfo; |
118 | class NamedDecl; |
119 | class ObjCInterfaceDecl; |
120 | class ObjCProtocolDecl; |
121 | class ObjCTypeParamDecl; |
122 | struct PrintingPolicy; |
123 | class RecordDecl; |
124 | class Stmt; |
125 | class TagDecl; |
126 | class TemplateArgument; |
127 | class TemplateArgumentListInfo; |
128 | class TemplateArgumentLoc; |
129 | class TemplateTypeParmDecl; |
130 | class TypedefNameDecl; |
131 | class UnresolvedUsingTypenameDecl; |
132 | |
133 | using CanQualType = CanQual<Type>; |
134 | |
135 | // Provide forward declarations for all of the *Type classes. |
136 | #define TYPE(Class, Base) class Class##Type; |
137 | #include "clang/AST/TypeNodes.inc" |
138 | |
139 | /// The collection of all-type qualifiers we support. |
140 | /// Clang supports five independent qualifiers: |
141 | /// * C99: const, volatile, and restrict |
142 | /// * MS: __unaligned |
143 | /// * Embedded C (TR18037): address spaces |
144 | /// * Objective C: the GC attributes (none, weak, or strong) |
145 | class Qualifiers { |
146 | public: |
147 | enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. |
148 | Const = 0x1, |
149 | Restrict = 0x2, |
150 | Volatile = 0x4, |
151 | CVRMask = Const | Volatile | Restrict |
152 | }; |
153 | |
154 | enum GC { |
155 | GCNone = 0, |
156 | Weak, |
157 | Strong |
158 | }; |
159 | |
160 | enum ObjCLifetime { |
161 | /// There is no lifetime qualification on this type. |
162 | OCL_None, |
163 | |
164 | /// This object can be modified without requiring retains or |
165 | /// releases. |
166 | OCL_ExplicitNone, |
167 | |
168 | /// Assigning into this object requires the old value to be |
169 | /// released and the new value to be retained. The timing of the |
170 | /// release of the old value is inexact: it may be moved to |
171 | /// immediately after the last known point where the value is |
172 | /// live. |
173 | OCL_Strong, |
174 | |
175 | /// Reading or writing from this object requires a barrier call. |
176 | OCL_Weak, |
177 | |
178 | /// Assigning into this object requires a lifetime extension. |
179 | OCL_Autoreleasing |
180 | }; |
181 | |
182 | enum { |
183 | /// The maximum supported address space number. |
184 | /// 23 bits should be enough for anyone. |
185 | MaxAddressSpace = 0x7fffffu, |
186 | |
187 | /// The width of the "fast" qualifier mask. |
188 | FastWidth = 3, |
189 | |
190 | /// The fast qualifier mask. |
191 | FastMask = (1 << FastWidth) - 1 |
192 | }; |
193 | |
194 | /// Returns the common set of qualifiers while removing them from |
195 | /// the given sets. |
196 | static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { |
197 | // If both are only CVR-qualified, bit operations are sufficient. |
198 | if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { |
199 | Qualifiers Q; |
200 | Q.Mask = L.Mask & R.Mask; |
201 | L.Mask &= ~Q.Mask; |
202 | R.Mask &= ~Q.Mask; |
203 | return Q; |
204 | } |
205 | |
206 | Qualifiers Q; |
207 | unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); |
208 | Q.addCVRQualifiers(CommonCRV); |
209 | L.removeCVRQualifiers(CommonCRV); |
210 | R.removeCVRQualifiers(CommonCRV); |
211 | |
212 | if (L.getObjCGCAttr() == R.getObjCGCAttr()) { |
213 | Q.setObjCGCAttr(L.getObjCGCAttr()); |
214 | L.removeObjCGCAttr(); |
215 | R.removeObjCGCAttr(); |
216 | } |
217 | |
218 | if (L.getObjCLifetime() == R.getObjCLifetime()) { |
219 | Q.setObjCLifetime(L.getObjCLifetime()); |
220 | L.removeObjCLifetime(); |
221 | R.removeObjCLifetime(); |
222 | } |
223 | |
224 | if (L.getAddressSpace() == R.getAddressSpace()) { |
225 | Q.setAddressSpace(L.getAddressSpace()); |
226 | L.removeAddressSpace(); |
227 | R.removeAddressSpace(); |
228 | } |
229 | return Q; |
230 | } |
231 | |
232 | static Qualifiers fromFastMask(unsigned Mask) { |
233 | Qualifiers Qs; |
234 | Qs.addFastQualifiers(Mask); |
235 | return Qs; |
236 | } |
237 | |
238 | static Qualifiers fromCVRMask(unsigned CVR) { |
239 | Qualifiers Qs; |
240 | Qs.addCVRQualifiers(CVR); |
241 | return Qs; |
242 | } |
243 | |
244 | static Qualifiers fromCVRUMask(unsigned CVRU) { |
245 | Qualifiers Qs; |
246 | Qs.addCVRUQualifiers(CVRU); |
247 | return Qs; |
248 | } |
249 | |
250 | // Deserialize qualifiers from an opaque representation. |
251 | static Qualifiers fromOpaqueValue(unsigned opaque) { |
252 | Qualifiers Qs; |
253 | Qs.Mask = opaque; |
254 | return Qs; |
255 | } |
256 | |
257 | // Serialize these qualifiers into an opaque representation. |
258 | unsigned getAsOpaqueValue() const { |
259 | return Mask; |
260 | } |
261 | |
262 | bool hasConst() const { return Mask & Const; } |
263 | bool hasOnlyConst() const { return Mask == Const; } |
264 | void removeConst() { Mask &= ~Const; } |
265 | void addConst() { Mask |= Const; } |
266 | |
267 | bool hasVolatile() const { return Mask & Volatile; } |
268 | bool hasOnlyVolatile() const { return Mask == Volatile; } |
269 | void removeVolatile() { Mask &= ~Volatile; } |
270 | void addVolatile() { Mask |= Volatile; } |
271 | |
272 | bool hasRestrict() const { return Mask & Restrict; } |
273 | bool hasOnlyRestrict() const { return Mask == Restrict; } |
274 | void removeRestrict() { Mask &= ~Restrict; } |
275 | void addRestrict() { Mask |= Restrict; } |
276 | |
277 | bool hasCVRQualifiers() const { return getCVRQualifiers(); } |
278 | unsigned getCVRQualifiers() const { return Mask & CVRMask; } |
279 | unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); } |
280 | |
281 | void setCVRQualifiers(unsigned mask) { |
282 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 282, __extension__ __PRETTY_FUNCTION__)); |
283 | Mask = (Mask & ~CVRMask) | mask; |
284 | } |
285 | void removeCVRQualifiers(unsigned mask) { |
286 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 286, __extension__ __PRETTY_FUNCTION__)); |
287 | Mask &= ~mask; |
288 | } |
289 | void removeCVRQualifiers() { |
290 | removeCVRQualifiers(CVRMask); |
291 | } |
292 | void addCVRQualifiers(unsigned mask) { |
293 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")(static_cast <bool> (!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? void (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 293, __extension__ __PRETTY_FUNCTION__)); |
294 | Mask |= mask; |
295 | } |
296 | void addCVRUQualifiers(unsigned mask) { |
297 | assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")(static_cast <bool> (!(mask & ~CVRMask & ~UMask ) && "bitmask contains non-CVRU bits") ? void (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 297, __extension__ __PRETTY_FUNCTION__)); |
298 | Mask |= mask; |
299 | } |
300 | |
301 | bool hasUnaligned() const { return Mask & UMask; } |
302 | void setUnaligned(bool flag) { |
303 | Mask = (Mask & ~UMask) | (flag ? UMask : 0); |
304 | } |
305 | void removeUnaligned() { Mask &= ~UMask; } |
306 | void addUnaligned() { Mask |= UMask; } |
307 | |
308 | bool hasObjCGCAttr() const { return Mask & GCAttrMask; } |
309 | GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } |
310 | void setObjCGCAttr(GC type) { |
311 | Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); |
312 | } |
313 | void removeObjCGCAttr() { setObjCGCAttr(GCNone); } |
314 | void addObjCGCAttr(GC type) { |
315 | assert(type)(static_cast <bool> (type) ? void (0) : __assert_fail ( "type", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 315, __extension__ __PRETTY_FUNCTION__)); |
316 | setObjCGCAttr(type); |
317 | } |
318 | Qualifiers withoutObjCGCAttr() const { |
319 | Qualifiers qs = *this; |
320 | qs.removeObjCGCAttr(); |
321 | return qs; |
322 | } |
323 | Qualifiers withoutObjCLifetime() const { |
324 | Qualifiers qs = *this; |
325 | qs.removeObjCLifetime(); |
326 | return qs; |
327 | } |
328 | Qualifiers withoutAddressSpace() const { |
329 | Qualifiers qs = *this; |
330 | qs.removeAddressSpace(); |
331 | return qs; |
332 | } |
333 | |
334 | bool hasObjCLifetime() const { return Mask & LifetimeMask; } |
335 | ObjCLifetime getObjCLifetime() const { |
336 | return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); |
337 | } |
338 | void setObjCLifetime(ObjCLifetime type) { |
339 | Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); |
340 | } |
341 | void removeObjCLifetime() { setObjCLifetime(OCL_None); } |
342 | void addObjCLifetime(ObjCLifetime type) { |
343 | assert(type)(static_cast <bool> (type) ? void (0) : __assert_fail ( "type", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 343, __extension__ __PRETTY_FUNCTION__)); |
344 | assert(!hasObjCLifetime())(static_cast <bool> (!hasObjCLifetime()) ? void (0) : __assert_fail ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 344, __extension__ __PRETTY_FUNCTION__)); |
345 | Mask |= (type << LifetimeShift); |
346 | } |
347 | |
348 | /// True if the lifetime is neither None or ExplicitNone. |
349 | bool hasNonTrivialObjCLifetime() const { |
350 | ObjCLifetime lifetime = getObjCLifetime(); |
351 | return (lifetime > OCL_ExplicitNone); |
352 | } |
353 | |
354 | /// True if the lifetime is either strong or weak. |
355 | bool hasStrongOrWeakObjCLifetime() const { |
356 | ObjCLifetime lifetime = getObjCLifetime(); |
357 | return (lifetime == OCL_Strong || lifetime == OCL_Weak); |
358 | } |
359 | |
360 | bool hasAddressSpace() const { return Mask & AddressSpaceMask; } |
361 | LangAS getAddressSpace() const { |
362 | return static_cast<LangAS>(Mask >> AddressSpaceShift); |
363 | } |
364 | bool hasTargetSpecificAddressSpace() const { |
365 | return isTargetAddressSpace(getAddressSpace()); |
366 | } |
367 | /// Get the address space attribute value to be printed by diagnostics. |
368 | unsigned getAddressSpaceAttributePrintValue() const { |
369 | auto Addr = getAddressSpace(); |
370 | // This function is not supposed to be used with language specific |
371 | // address spaces. If that happens, the diagnostic message should consider |
372 | // printing the QualType instead of the address space value. |
373 | assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())(static_cast <bool> (Addr == LangAS::Default || hasTargetSpecificAddressSpace ()) ? void (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 373, __extension__ __PRETTY_FUNCTION__)); |
374 | if (Addr != LangAS::Default) |
375 | return toTargetAddressSpace(Addr); |
376 | // TODO: The diagnostic messages where Addr may be 0 should be fixed |
377 | // since it cannot differentiate the situation where 0 denotes the default |
378 | // address space or user specified __attribute__((address_space(0))). |
379 | return 0; |
380 | } |
381 | void setAddressSpace(LangAS space) { |
382 | assert((unsigned)space <= MaxAddressSpace)(static_cast <bool> ((unsigned)space <= MaxAddressSpace ) ? void (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 382, __extension__ __PRETTY_FUNCTION__)); |
383 | Mask = (Mask & ~AddressSpaceMask) |
384 | | (((uint32_t) space) << AddressSpaceShift); |
385 | } |
386 | void removeAddressSpace() { setAddressSpace(LangAS::Default); } |
387 | void addAddressSpace(LangAS space) { |
388 | assert(space != LangAS::Default)(static_cast <bool> (space != LangAS::Default) ? void ( 0) : __assert_fail ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 388, __extension__ __PRETTY_FUNCTION__)); |
389 | setAddressSpace(space); |
390 | } |
391 | |
392 | // Fast qualifiers are those that can be allocated directly |
393 | // on a QualType object. |
394 | bool hasFastQualifiers() const { return getFastQualifiers(); } |
395 | unsigned getFastQualifiers() const { return Mask & FastMask; } |
396 | void setFastQualifiers(unsigned mask) { |
397 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 397, __extension__ __PRETTY_FUNCTION__)); |
398 | Mask = (Mask & ~FastMask) | mask; |
399 | } |
400 | void removeFastQualifiers(unsigned mask) { |
401 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 401, __extension__ __PRETTY_FUNCTION__)); |
402 | Mask &= ~mask; |
403 | } |
404 | void removeFastQualifiers() { |
405 | removeFastQualifiers(FastMask); |
406 | } |
407 | void addFastQualifiers(unsigned mask) { |
408 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")(static_cast <bool> (!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits") ? void (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 408, __extension__ __PRETTY_FUNCTION__)); |
409 | Mask |= mask; |
410 | } |
411 | |
412 | /// Return true if the set contains any qualifiers which require an ExtQuals |
413 | /// node to be allocated. |
414 | bool hasNonFastQualifiers() const { return Mask & ~FastMask; } |
415 | Qualifiers getNonFastQualifiers() const { |
416 | Qualifiers Quals = *this; |
417 | Quals.setFastQualifiers(0); |
418 | return Quals; |
419 | } |
420 | |
421 | /// Return true if the set contains any qualifiers. |
422 | bool hasQualifiers() const { return Mask; } |
423 | bool empty() const { return !Mask; } |
424 | |
425 | /// Add the qualifiers from the given set to this set. |
426 | void addQualifiers(Qualifiers Q) { |
427 | // If the other set doesn't have any non-boolean qualifiers, just |
428 | // bit-or it in. |
429 | if (!(Q.Mask & ~CVRMask)) |
430 | Mask |= Q.Mask; |
431 | else { |
432 | Mask |= (Q.Mask & CVRMask); |
433 | if (Q.hasAddressSpace()) |
434 | addAddressSpace(Q.getAddressSpace()); |
435 | if (Q.hasObjCGCAttr()) |
436 | addObjCGCAttr(Q.getObjCGCAttr()); |
437 | if (Q.hasObjCLifetime()) |
438 | addObjCLifetime(Q.getObjCLifetime()); |
439 | } |
440 | } |
441 | |
442 | /// Remove the qualifiers from the given set from this set. |
443 | void removeQualifiers(Qualifiers Q) { |
444 | // If the other set doesn't have any non-boolean qualifiers, just |
445 | // bit-and the inverse in. |
446 | if (!(Q.Mask & ~CVRMask)) |
447 | Mask &= ~Q.Mask; |
448 | else { |
449 | Mask &= ~(Q.Mask & CVRMask); |
450 | if (getObjCGCAttr() == Q.getObjCGCAttr()) |
451 | removeObjCGCAttr(); |
452 | if (getObjCLifetime() == Q.getObjCLifetime()) |
453 | removeObjCLifetime(); |
454 | if (getAddressSpace() == Q.getAddressSpace()) |
455 | removeAddressSpace(); |
456 | } |
457 | } |
458 | |
459 | /// Add the qualifiers from the given set to this set, given that |
460 | /// they don't conflict. |
461 | void addConsistentQualifiers(Qualifiers qs) { |
462 | assert(getAddressSpace() == qs.getAddressSpace() ||(static_cast <bool> (getAddressSpace() == qs.getAddressSpace () || !hasAddressSpace() || !qs.hasAddressSpace()) ? void (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 463, __extension__ __PRETTY_FUNCTION__)) |
463 | !hasAddressSpace() || !qs.hasAddressSpace())(static_cast <bool> (getAddressSpace() == qs.getAddressSpace () || !hasAddressSpace() || !qs.hasAddressSpace()) ? void (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 463, __extension__ __PRETTY_FUNCTION__)); |
464 | assert(getObjCGCAttr() == qs.getObjCGCAttr() ||(static_cast <bool> (getObjCGCAttr() == qs.getObjCGCAttr () || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? void (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 465, __extension__ __PRETTY_FUNCTION__)) |
465 | !hasObjCGCAttr() || !qs.hasObjCGCAttr())(static_cast <bool> (getObjCGCAttr() == qs.getObjCGCAttr () || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? void (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 465, __extension__ __PRETTY_FUNCTION__)); |
466 | assert(getObjCLifetime() == qs.getObjCLifetime() ||(static_cast <bool> (getObjCLifetime() == qs.getObjCLifetime () || !hasObjCLifetime() || !qs.hasObjCLifetime()) ? void (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 467, __extension__ __PRETTY_FUNCTION__)) |
467 | !hasObjCLifetime() || !qs.hasObjCLifetime())(static_cast <bool> (getObjCLifetime() == qs.getObjCLifetime () || !hasObjCLifetime() || !qs.hasObjCLifetime()) ? void (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 467, __extension__ __PRETTY_FUNCTION__)); |
468 | Mask |= qs.Mask; |
469 | } |
470 | |
471 | /// Returns true if address space A is equal to or a superset of B. |
472 | /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of |
473 | /// overlapping address spaces. |
474 | /// CL1.1 or CL1.2: |
475 | /// every address space is a superset of itself. |
476 | /// CL2.0 adds: |
477 | /// __generic is a superset of any address space except for __constant. |
478 | static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) { |
479 | // Address spaces must match exactly. |
480 | return A == B || |
481 | // Otherwise in OpenCLC v2.0 s6.5.5: every address space except |
482 | // for __constant can be used as __generic. |
483 | (A == LangAS::opencl_generic && B != LangAS::opencl_constant) || |
484 | // We also define global_device and global_host address spaces, |
485 | // to distinguish global pointers allocated on host from pointers |
486 | // allocated on device, which are a subset of __global. |
487 | (A == LangAS::opencl_global && (B == LangAS::opencl_global_device || |
488 | B == LangAS::opencl_global_host)) || |
489 | (A == LangAS::sycl_global && (B == LangAS::sycl_global_device || |
490 | B == LangAS::sycl_global_host)) || |
491 | // Consider pointer size address spaces to be equivalent to default. |
492 | ((isPtrSizeAddressSpace(A) || A == LangAS::Default) && |
493 | (isPtrSizeAddressSpace(B) || B == LangAS::Default)) || |
494 | // Default is a superset of SYCL address spaces. |
495 | (A == LangAS::Default && |
496 | (B == LangAS::sycl_private || B == LangAS::sycl_local || |
497 | B == LangAS::sycl_global || B == LangAS::sycl_global_device || |
498 | B == LangAS::sycl_global_host)); |
499 | } |
500 | |
501 | /// Returns true if the address space in these qualifiers is equal to or |
502 | /// a superset of the address space in the argument qualifiers. |
503 | bool isAddressSpaceSupersetOf(Qualifiers other) const { |
504 | return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace()); |
505 | } |
506 | |
507 | /// Determines if these qualifiers compatibly include another set. |
508 | /// Generally this answers the question of whether an object with the other |
509 | /// qualifiers can be safely used as an object with these qualifiers. |
510 | bool compatiblyIncludes(Qualifiers other) const { |
511 | return isAddressSpaceSupersetOf(other) && |
512 | // ObjC GC qualifiers can match, be added, or be removed, but can't |
513 | // be changed. |
514 | (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() || |
515 | !other.hasObjCGCAttr()) && |
516 | // ObjC lifetime qualifiers must match exactly. |
517 | getObjCLifetime() == other.getObjCLifetime() && |
518 | // CVR qualifiers may subset. |
519 | (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) && |
520 | // U qualifier may superset. |
521 | (!other.hasUnaligned() || hasUnaligned()); |
522 | } |
523 | |
524 | /// Determines if these qualifiers compatibly include another set of |
525 | /// qualifiers from the narrow perspective of Objective-C ARC lifetime. |
526 | /// |
527 | /// One set of Objective-C lifetime qualifiers compatibly includes the other |
528 | /// if the lifetime qualifiers match, or if both are non-__weak and the |
529 | /// including set also contains the 'const' qualifier, or both are non-__weak |
530 | /// and one is None (which can only happen in non-ARC modes). |
531 | bool compatiblyIncludesObjCLifetime(Qualifiers other) const { |
532 | if (getObjCLifetime() == other.getObjCLifetime()) |
533 | return true; |
534 | |
535 | if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) |
536 | return false; |
537 | |
538 | if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None) |
539 | return true; |
540 | |
541 | return hasConst(); |
542 | } |
543 | |
544 | /// Determine whether this set of qualifiers is a strict superset of |
545 | /// another set of qualifiers, not considering qualifier compatibility. |
546 | bool isStrictSupersetOf(Qualifiers Other) const; |
547 | |
548 | bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } |
549 | bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } |
550 | |
551 | explicit operator bool() const { return hasQualifiers(); } |
552 | |
553 | Qualifiers &operator+=(Qualifiers R) { |
554 | addQualifiers(R); |
555 | return *this; |
556 | } |
557 | |
558 | // Union two qualifier sets. If an enumerated qualifier appears |
559 | // in both sets, use the one from the right. |
560 | friend Qualifiers operator+(Qualifiers L, Qualifiers R) { |
561 | L += R; |
562 | return L; |
563 | } |
564 | |
565 | Qualifiers &operator-=(Qualifiers R) { |
566 | removeQualifiers(R); |
567 | return *this; |
568 | } |
569 | |
570 | /// Compute the difference between two qualifier sets. |
571 | friend Qualifiers operator-(Qualifiers L, Qualifiers R) { |
572 | L -= R; |
573 | return L; |
574 | } |
575 | |
576 | std::string getAsString() const; |
577 | std::string getAsString(const PrintingPolicy &Policy) const; |
578 | |
579 | static std::string getAddrSpaceAsString(LangAS AS); |
580 | |
581 | bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; |
582 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
583 | bool appendSpaceIfNonEmpty = false) const; |
584 | |
585 | void Profile(llvm::FoldingSetNodeID &ID) const { |
586 | ID.AddInteger(Mask); |
587 | } |
588 | |
589 | private: |
590 | // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31| |
591 | // |C R V|U|GCAttr|Lifetime|AddressSpace| |
592 | uint32_t Mask = 0; |
593 | |
594 | static const uint32_t UMask = 0x8; |
595 | static const uint32_t UShift = 3; |
596 | static const uint32_t GCAttrMask = 0x30; |
597 | static const uint32_t GCAttrShift = 4; |
598 | static const uint32_t LifetimeMask = 0x1C0; |
599 | static const uint32_t LifetimeShift = 6; |
600 | static const uint32_t AddressSpaceMask = |
601 | ~(CVRMask | UMask | GCAttrMask | LifetimeMask); |
602 | static const uint32_t AddressSpaceShift = 9; |
603 | }; |
604 | |
605 | /// A std::pair-like structure for storing a qualified type split |
606 | /// into its local qualifiers and its locally-unqualified type. |
607 | struct SplitQualType { |
608 | /// The locally-unqualified type. |
609 | const Type *Ty = nullptr; |
610 | |
611 | /// The local qualifiers. |
612 | Qualifiers Quals; |
613 | |
614 | SplitQualType() = default; |
615 | SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} |
616 | |
617 | SplitQualType getSingleStepDesugaredType() const; // end of this file |
618 | |
619 | // Make std::tie work. |
620 | std::pair<const Type *,Qualifiers> asPair() const { |
621 | return std::pair<const Type *, Qualifiers>(Ty, Quals); |
622 | } |
623 | |
624 | friend bool operator==(SplitQualType a, SplitQualType b) { |
625 | return a.Ty == b.Ty && a.Quals == b.Quals; |
626 | } |
627 | friend bool operator!=(SplitQualType a, SplitQualType b) { |
628 | return a.Ty != b.Ty || a.Quals != b.Quals; |
629 | } |
630 | }; |
631 | |
632 | /// The kind of type we are substituting Objective-C type arguments into. |
633 | /// |
634 | /// The kind of substitution affects the replacement of type parameters when |
635 | /// no concrete type information is provided, e.g., when dealing with an |
636 | /// unspecialized type. |
637 | enum class ObjCSubstitutionContext { |
638 | /// An ordinary type. |
639 | Ordinary, |
640 | |
641 | /// The result type of a method or function. |
642 | Result, |
643 | |
644 | /// The parameter type of a method or function. |
645 | Parameter, |
646 | |
647 | /// The type of a property. |
648 | Property, |
649 | |
650 | /// The superclass of a type. |
651 | Superclass, |
652 | }; |
653 | |
654 | /// A (possibly-)qualified type. |
655 | /// |
656 | /// For efficiency, we don't store CV-qualified types as nodes on their |
657 | /// own: instead each reference to a type stores the qualifiers. This |
658 | /// greatly reduces the number of nodes we need to allocate for types (for |
659 | /// example we only need one for 'int', 'const int', 'volatile int', |
660 | /// 'const volatile int', etc). |
661 | /// |
662 | /// As an added efficiency bonus, instead of making this a pair, we |
663 | /// just store the two bits we care about in the low bits of the |
664 | /// pointer. To handle the packing/unpacking, we make QualType be a |
665 | /// simple wrapper class that acts like a smart pointer. A third bit |
666 | /// indicates whether there are extended qualifiers present, in which |
667 | /// case the pointer points to a special structure. |
668 | class QualType { |
669 | friend class QualifierCollector; |
670 | |
671 | // Thankfully, these are efficiently composable. |
672 | llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>, |
673 | Qualifiers::FastWidth> Value; |
674 | |
675 | const ExtQuals *getExtQualsUnsafe() const { |
676 | return Value.getPointer().get<const ExtQuals*>(); |
677 | } |
678 | |
679 | const Type *getTypePtrUnsafe() const { |
680 | return Value.getPointer().get<const Type*>(); |
681 | } |
682 | |
683 | const ExtQualsTypeCommonBase *getCommonPtr() const { |
684 | assert(!isNull() && "Cannot retrieve a NULL type pointer")(static_cast <bool> (!isNull() && "Cannot retrieve a NULL type pointer" ) ? void (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 684, __extension__ __PRETTY_FUNCTION__)); |
685 | auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); |
686 | CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); |
687 | return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); |
688 | } |
689 | |
690 | public: |
691 | QualType() = default; |
692 | QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
693 | QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
694 | |
695 | unsigned getLocalFastQualifiers() const { return Value.getInt(); } |
696 | void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } |
697 | |
698 | /// Retrieves a pointer to the underlying (unqualified) type. |
699 | /// |
700 | /// This function requires that the type not be NULL. If the type might be |
701 | /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). |
702 | const Type *getTypePtr() const; |
703 | |
704 | const Type *getTypePtrOrNull() const; |
705 | |
706 | /// Retrieves a pointer to the name of the base type. |
707 | const IdentifierInfo *getBaseTypeIdentifier() const; |
708 | |
709 | /// Divides a QualType into its unqualified type and a set of local |
710 | /// qualifiers. |
711 | SplitQualType split() const; |
712 | |
713 | void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } |
714 | |
715 | static QualType getFromOpaquePtr(const void *Ptr) { |
716 | QualType T; |
717 | T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); |
718 | return T; |
719 | } |
720 | |
721 | const Type &operator*() const { |
722 | return *getTypePtr(); |
723 | } |
724 | |
725 | const Type *operator->() const { |
726 | return getTypePtr(); |
727 | } |
728 | |
729 | bool isCanonical() const; |
730 | bool isCanonicalAsParam() const; |
731 | |
732 | /// Return true if this QualType doesn't point to a type yet. |
733 | bool isNull() const { |
734 | return Value.getPointer().isNull(); |
735 | } |
736 | |
737 | /// Determine whether this particular QualType instance has the |
738 | /// "const" qualifier set, without looking through typedefs that may have |
739 | /// added "const" at a different level. |
740 | bool isLocalConstQualified() const { |
741 | return (getLocalFastQualifiers() & Qualifiers::Const); |
742 | } |
743 | |
744 | /// Determine whether this type is const-qualified. |
745 | bool isConstQualified() const; |
746 | |
747 | /// Determine whether this particular QualType instance has the |
748 | /// "restrict" qualifier set, without looking through typedefs that may have |
749 | /// added "restrict" at a different level. |
750 | bool isLocalRestrictQualified() const { |
751 | return (getLocalFastQualifiers() & Qualifiers::Restrict); |
752 | } |
753 | |
754 | /// Determine whether this type is restrict-qualified. |
755 | bool isRestrictQualified() const; |
756 | |
757 | /// Determine whether this particular QualType instance has the |
758 | /// "volatile" qualifier set, without looking through typedefs that may have |
759 | /// added "volatile" at a different level. |
760 | bool isLocalVolatileQualified() const { |
761 | return (getLocalFastQualifiers() & Qualifiers::Volatile); |
762 | } |
763 | |
764 | /// Determine whether this type is volatile-qualified. |
765 | bool isVolatileQualified() const; |
766 | |
767 | /// Determine whether this particular QualType instance has any |
768 | /// qualifiers, without looking through any typedefs that might add |
769 | /// qualifiers at a different level. |
770 | bool hasLocalQualifiers() const { |
771 | return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); |
772 | } |
773 | |
774 | /// Determine whether this type has any qualifiers. |
775 | bool hasQualifiers() const; |
776 | |
777 | /// Determine whether this particular QualType instance has any |
778 | /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType |
779 | /// instance. |
780 | bool hasLocalNonFastQualifiers() const { |
781 | return Value.getPointer().is<const ExtQuals*>(); |
782 | } |
783 | |
784 | /// Retrieve the set of qualifiers local to this particular QualType |
785 | /// instance, not including any qualifiers acquired through typedefs or |
786 | /// other sugar. |
787 | Qualifiers getLocalQualifiers() const; |
788 | |
789 | /// Retrieve the set of qualifiers applied to this type. |
790 | Qualifiers getQualifiers() const; |
791 | |
792 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
793 | /// local to this particular QualType instance, not including any qualifiers |
794 | /// acquired through typedefs or other sugar. |
795 | unsigned getLocalCVRQualifiers() const { |
796 | return getLocalFastQualifiers(); |
797 | } |
798 | |
799 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
800 | /// applied to this type. |
801 | unsigned getCVRQualifiers() const; |
802 | |
803 | bool isConstant(const ASTContext& Ctx) const { |
804 | return QualType::isConstant(*this, Ctx); |
805 | } |
806 | |
807 | /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). |
808 | bool isPODType(const ASTContext &Context) const; |
809 | |
810 | /// Return true if this is a POD type according to the rules of the C++98 |
811 | /// standard, regardless of the current compilation's language. |
812 | bool isCXX98PODType(const ASTContext &Context) const; |
813 | |
814 | /// Return true if this is a POD type according to the more relaxed rules |
815 | /// of the C++11 standard, regardless of the current compilation's language. |
816 | /// (C++0x [basic.types]p9). Note that, unlike |
817 | /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account. |
818 | bool isCXX11PODType(const ASTContext &Context) const; |
819 | |
820 | /// Return true if this is a trivial type per (C++0x [basic.types]p9) |
821 | bool isTrivialType(const ASTContext &Context) const; |
822 | |
823 | /// Return true if this is a trivially copyable type (C++0x [basic.types]p9) |
824 | bool isTriviallyCopyableType(const ASTContext &Context) const; |
825 | |
826 | |
827 | /// Returns true if it is a class and it might be dynamic. |
828 | bool mayBeDynamicClass() const; |
829 | |
830 | /// Returns true if it is not a class or if the class might not be dynamic. |
831 | bool mayBeNotDynamicClass() const; |
832 | |
833 | // Don't promise in the API that anything besides 'const' can be |
834 | // easily added. |
835 | |
836 | /// Add the `const` type qualifier to this QualType. |
837 | void addConst() { |
838 | addFastQualifiers(Qualifiers::Const); |
839 | } |
840 | QualType withConst() const { |
841 | return withFastQualifiers(Qualifiers::Const); |
842 | } |
843 | |
844 | /// Add the `volatile` type qualifier to this QualType. |
845 | void addVolatile() { |
846 | addFastQualifiers(Qualifiers::Volatile); |
847 | } |
848 | QualType withVolatile() const { |
849 | return withFastQualifiers(Qualifiers::Volatile); |
850 | } |
851 | |
852 | /// Add the `restrict` qualifier to this QualType. |
853 | void addRestrict() { |
854 | addFastQualifiers(Qualifiers::Restrict); |
855 | } |
856 | QualType withRestrict() const { |
857 | return withFastQualifiers(Qualifiers::Restrict); |
858 | } |
859 | |
860 | QualType withCVRQualifiers(unsigned CVR) const { |
861 | return withFastQualifiers(CVR); |
862 | } |
863 | |
864 | void addFastQualifiers(unsigned TQs) { |
865 | assert(!(TQs & ~Qualifiers::FastMask)(static_cast <bool> (!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!") ? void (0 ) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 866, __extension__ __PRETTY_FUNCTION__)) |
866 | && "non-fast qualifier bits set in mask!")(static_cast <bool> (!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!") ? void (0 ) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 866, __extension__ __PRETTY_FUNCTION__)); |
867 | Value.setInt(Value.getInt() | TQs); |
868 | } |
869 | |
870 | void removeLocalConst(); |
871 | void removeLocalVolatile(); |
872 | void removeLocalRestrict(); |
873 | void removeLocalCVRQualifiers(unsigned Mask); |
874 | |
875 | void removeLocalFastQualifiers() { Value.setInt(0); } |
876 | void removeLocalFastQualifiers(unsigned Mask) { |
877 | assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")(static_cast <bool> (!(Mask & ~Qualifiers::FastMask ) && "mask has non-fast qualifiers") ? void (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 877, __extension__ __PRETTY_FUNCTION__)); |
878 | Value.setInt(Value.getInt() & ~Mask); |
879 | } |
880 | |
881 | // Creates a type with the given qualifiers in addition to any |
882 | // qualifiers already on this type. |
883 | QualType withFastQualifiers(unsigned TQs) const { |
884 | QualType T = *this; |
885 | T.addFastQualifiers(TQs); |
886 | return T; |
887 | } |
888 | |
889 | // Creates a type with exactly the given fast qualifiers, removing |
890 | // any existing fast qualifiers. |
891 | QualType withExactLocalFastQualifiers(unsigned TQs) const { |
892 | return withoutLocalFastQualifiers().withFastQualifiers(TQs); |
893 | } |
894 | |
895 | // Removes fast qualifiers, but leaves any extended qualifiers in place. |
896 | QualType withoutLocalFastQualifiers() const { |
897 | QualType T = *this; |
898 | T.removeLocalFastQualifiers(); |
899 | return T; |
900 | } |
901 | |
902 | QualType getCanonicalType() const; |
903 | |
904 | /// Return this type with all of the instance-specific qualifiers |
905 | /// removed, but without removing any qualifiers that may have been applied |
906 | /// through typedefs. |
907 | QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } |
908 | |
909 | /// Retrieve the unqualified variant of the given type, |
910 | /// removing as little sugar as possible. |
911 | /// |
912 | /// This routine looks through various kinds of sugar to find the |
913 | /// least-desugared type that is unqualified. For example, given: |
914 | /// |
915 | /// \code |
916 | /// typedef int Integer; |
917 | /// typedef const Integer CInteger; |
918 | /// typedef CInteger DifferenceType; |
919 | /// \endcode |
920 | /// |
921 | /// Executing \c getUnqualifiedType() on the type \c DifferenceType will |
922 | /// desugar until we hit the type \c Integer, which has no qualifiers on it. |
923 | /// |
924 | /// The resulting type might still be qualified if it's sugar for an array |
925 | /// type. To strip qualifiers even from within a sugared array type, use |
926 | /// ASTContext::getUnqualifiedArrayType. |
927 | inline QualType getUnqualifiedType() const; |
928 | |
929 | /// Retrieve the unqualified variant of the given type, removing as little |
930 | /// sugar as possible. |
931 | /// |
932 | /// Like getUnqualifiedType(), but also returns the set of |
933 | /// qualifiers that were built up. |
934 | /// |
935 | /// The resulting type might still be qualified if it's sugar for an array |
936 | /// type. To strip qualifiers even from within a sugared array type, use |
937 | /// ASTContext::getUnqualifiedArrayType. |
938 | inline SplitQualType getSplitUnqualifiedType() const; |
939 | |
940 | /// Determine whether this type is more qualified than the other |
941 | /// given type, requiring exact equality for non-CVR qualifiers. |
942 | bool isMoreQualifiedThan(QualType Other) const; |
943 | |
944 | /// Determine whether this type is at least as qualified as the other |
945 | /// given type, requiring exact equality for non-CVR qualifiers. |
946 | bool isAtLeastAsQualifiedAs(QualType Other) const; |
947 | |
948 | QualType getNonReferenceType() const; |
949 | |
950 | /// Determine the type of a (typically non-lvalue) expression with the |
951 | /// specified result type. |
952 | /// |
953 | /// This routine should be used for expressions for which the return type is |
954 | /// explicitly specified (e.g., in a cast or call) and isn't necessarily |
955 | /// an lvalue. It removes a top-level reference (since there are no |
956 | /// expressions of reference type) and deletes top-level cvr-qualifiers |
957 | /// from non-class types (in C++) or all types (in C). |
958 | QualType getNonLValueExprType(const ASTContext &Context) const; |
959 | |
960 | /// Remove an outer pack expansion type (if any) from this type. Used as part |
961 | /// of converting the type of a declaration to the type of an expression that |
962 | /// references that expression. It's meaningless for an expression to have a |
963 | /// pack expansion type. |
964 | QualType getNonPackExpansionType() const; |
965 | |
966 | /// Return the specified type with any "sugar" removed from |
967 | /// the type. This takes off typedefs, typeof's etc. If the outer level of |
968 | /// the type is already concrete, it returns it unmodified. This is similar |
969 | /// to getting the canonical type, but it doesn't remove *all* typedefs. For |
970 | /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is |
971 | /// concrete. |
972 | /// |
973 | /// Qualifiers are left in place. |
974 | QualType getDesugaredType(const ASTContext &Context) const { |
975 | return getDesugaredType(*this, Context); |
976 | } |
977 | |
978 | SplitQualType getSplitDesugaredType() const { |
979 | return getSplitDesugaredType(*this); |
980 | } |
981 | |
982 | /// Return the specified type with one level of "sugar" removed from |
983 | /// the type. |
984 | /// |
985 | /// This routine takes off the first typedef, typeof, etc. If the outer level |
986 | /// of the type is already concrete, it returns it unmodified. |
987 | QualType getSingleStepDesugaredType(const ASTContext &Context) const { |
988 | return getSingleStepDesugaredTypeImpl(*this, Context); |
989 | } |
990 | |
991 | /// Returns the specified type after dropping any |
992 | /// outer-level parentheses. |
993 | QualType IgnoreParens() const { |
994 | if (isa<ParenType>(*this)) |
995 | return QualType::IgnoreParens(*this); |
996 | return *this; |
997 | } |
998 | |
999 | /// Indicate whether the specified types and qualifiers are identical. |
1000 | friend bool operator==(const QualType &LHS, const QualType &RHS) { |
1001 | return LHS.Value == RHS.Value; |
1002 | } |
1003 | friend bool operator!=(const QualType &LHS, const QualType &RHS) { |
1004 | return LHS.Value != RHS.Value; |
1005 | } |
1006 | friend bool operator<(const QualType &LHS, const QualType &RHS) { |
1007 | return LHS.Value < RHS.Value; |
1008 | } |
1009 | |
1010 | static std::string getAsString(SplitQualType split, |
1011 | const PrintingPolicy &Policy) { |
1012 | return getAsString(split.Ty, split.Quals, Policy); |
1013 | } |
1014 | static std::string getAsString(const Type *ty, Qualifiers qs, |
1015 | const PrintingPolicy &Policy); |
1016 | |
1017 | std::string getAsString() const; |
1018 | std::string getAsString(const PrintingPolicy &Policy) const; |
1019 | |
1020 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
1021 | const Twine &PlaceHolder = Twine(), |
1022 | unsigned Indentation = 0) const; |
1023 | |
1024 | static void print(SplitQualType split, raw_ostream &OS, |
1025 | const PrintingPolicy &policy, const Twine &PlaceHolder, |
1026 | unsigned Indentation = 0) { |
1027 | return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation); |
1028 | } |
1029 | |
1030 | static void print(const Type *ty, Qualifiers qs, |
1031 | raw_ostream &OS, const PrintingPolicy &policy, |
1032 | const Twine &PlaceHolder, |
1033 | unsigned Indentation = 0); |
1034 | |
1035 | void getAsStringInternal(std::string &Str, |
1036 | const PrintingPolicy &Policy) const; |
1037 | |
1038 | static void getAsStringInternal(SplitQualType split, std::string &out, |
1039 | const PrintingPolicy &policy) { |
1040 | return getAsStringInternal(split.Ty, split.Quals, out, policy); |
1041 | } |
1042 | |
1043 | static void getAsStringInternal(const Type *ty, Qualifiers qs, |
1044 | std::string &out, |
1045 | const PrintingPolicy &policy); |
1046 | |
1047 | class StreamedQualTypeHelper { |
1048 | const QualType &T; |
1049 | const PrintingPolicy &Policy; |
1050 | const Twine &PlaceHolder; |
1051 | unsigned Indentation; |
1052 | |
1053 | public: |
1054 | StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, |
1055 | const Twine &PlaceHolder, unsigned Indentation) |
1056 | : T(T), Policy(Policy), PlaceHolder(PlaceHolder), |
1057 | Indentation(Indentation) {} |
1058 | |
1059 | friend raw_ostream &operator<<(raw_ostream &OS, |
1060 | const StreamedQualTypeHelper &SQT) { |
1061 | SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation); |
1062 | return OS; |
1063 | } |
1064 | }; |
1065 | |
1066 | StreamedQualTypeHelper stream(const PrintingPolicy &Policy, |
1067 | const Twine &PlaceHolder = Twine(), |
1068 | unsigned Indentation = 0) const { |
1069 | return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation); |
1070 | } |
1071 | |
1072 | void dump(const char *s) const; |
1073 | void dump() const; |
1074 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
1075 | |
1076 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1077 | ID.AddPointer(getAsOpaquePtr()); |
1078 | } |
1079 | |
1080 | /// Check if this type has any address space qualifier. |
1081 | inline bool hasAddressSpace() const; |
1082 | |
1083 | /// Return the address space of this type. |
1084 | inline LangAS getAddressSpace() const; |
1085 | |
1086 | /// Returns true if address space qualifiers overlap with T address space |
1087 | /// qualifiers. |
1088 | /// OpenCL C defines conversion rules for pointers to different address spaces |
1089 | /// and notion of overlapping address spaces. |
1090 | /// CL1.1 or CL1.2: |
1091 | /// address spaces overlap iff they are they same. |
1092 | /// OpenCL C v2.0 s6.5.5 adds: |
1093 | /// __generic overlaps with any address space except for __constant. |
1094 | bool isAddressSpaceOverlapping(QualType T) const { |
1095 | Qualifiers Q = getQualifiers(); |
1096 | Qualifiers TQ = T.getQualifiers(); |
1097 | // Address spaces overlap if at least one of them is a superset of another |
1098 | return Q.isAddressSpaceSupersetOf(TQ) || TQ.isAddressSpaceSupersetOf(Q); |
1099 | } |
1100 | |
1101 | /// Returns gc attribute of this type. |
1102 | inline Qualifiers::GC getObjCGCAttr() const; |
1103 | |
1104 | /// true when Type is objc's weak. |
1105 | bool isObjCGCWeak() const { |
1106 | return getObjCGCAttr() == Qualifiers::Weak; |
1107 | } |
1108 | |
1109 | /// true when Type is objc's strong. |
1110 | bool isObjCGCStrong() const { |
1111 | return getObjCGCAttr() == Qualifiers::Strong; |
1112 | } |
1113 | |
1114 | /// Returns lifetime attribute of this type. |
1115 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1116 | return getQualifiers().getObjCLifetime(); |
1117 | } |
1118 | |
1119 | bool hasNonTrivialObjCLifetime() const { |
1120 | return getQualifiers().hasNonTrivialObjCLifetime(); |
1121 | } |
1122 | |
1123 | bool hasStrongOrWeakObjCLifetime() const { |
1124 | return getQualifiers().hasStrongOrWeakObjCLifetime(); |
1125 | } |
1126 | |
1127 | // true when Type is objc's weak and weak is enabled but ARC isn't. |
1128 | bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const; |
1129 | |
1130 | enum PrimitiveDefaultInitializeKind { |
1131 | /// The type does not fall into any of the following categories. Note that |
1132 | /// this case is zero-valued so that values of this enum can be used as a |
1133 | /// boolean condition for non-triviality. |
1134 | PDIK_Trivial, |
1135 | |
1136 | /// The type is an Objective-C retainable pointer type that is qualified |
1137 | /// with the ARC __strong qualifier. |
1138 | PDIK_ARCStrong, |
1139 | |
1140 | /// The type is an Objective-C retainable pointer type that is qualified |
1141 | /// with the ARC __weak qualifier. |
1142 | PDIK_ARCWeak, |
1143 | |
1144 | /// The type is a struct containing a field whose type is not PCK_Trivial. |
1145 | PDIK_Struct |
1146 | }; |
1147 | |
1148 | /// Functions to query basic properties of non-trivial C struct types. |
1149 | |
1150 | /// Check if this is a non-trivial type that would cause a C struct |
1151 | /// transitively containing this type to be non-trivial to default initialize |
1152 | /// and return the kind. |
1153 | PrimitiveDefaultInitializeKind |
1154 | isNonTrivialToPrimitiveDefaultInitialize() const; |
1155 | |
1156 | enum PrimitiveCopyKind { |
1157 | /// The type does not fall into any of the following categories. Note that |
1158 | /// this case is zero-valued so that values of this enum can be used as a |
1159 | /// boolean condition for non-triviality. |
1160 | PCK_Trivial, |
1161 | |
1162 | /// The type would be trivial except that it is volatile-qualified. Types |
1163 | /// that fall into one of the other non-trivial cases may additionally be |
1164 | /// volatile-qualified. |
1165 | PCK_VolatileTrivial, |
1166 | |
1167 | /// The type is an Objective-C retainable pointer type that is qualified |
1168 | /// with the ARC __strong qualifier. |
1169 | PCK_ARCStrong, |
1170 | |
1171 | /// The type is an Objective-C retainable pointer type that is qualified |
1172 | /// with the ARC __weak qualifier. |
1173 | PCK_ARCWeak, |
1174 | |
1175 | /// The type is a struct containing a field whose type is neither |
1176 | /// PCK_Trivial nor PCK_VolatileTrivial. |
1177 | /// Note that a C++ struct type does not necessarily match this; C++ copying |
1178 | /// semantics are too complex to express here, in part because they depend |
1179 | /// on the exact constructor or assignment operator that is chosen by |
1180 | /// overload resolution to do the copy. |
1181 | PCK_Struct |
1182 | }; |
1183 | |
1184 | /// Check if this is a non-trivial type that would cause a C struct |
1185 | /// transitively containing this type to be non-trivial to copy and return the |
1186 | /// kind. |
1187 | PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const; |
1188 | |
1189 | /// Check if this is a non-trivial type that would cause a C struct |
1190 | /// transitively containing this type to be non-trivial to destructively |
1191 | /// move and return the kind. Destructive move in this context is a C++-style |
1192 | /// move in which the source object is placed in a valid but unspecified state |
1193 | /// after it is moved, as opposed to a truly destructive move in which the |
1194 | /// source object is placed in an uninitialized state. |
1195 | PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const; |
1196 | |
1197 | enum DestructionKind { |
1198 | DK_none, |
1199 | DK_cxx_destructor, |
1200 | DK_objc_strong_lifetime, |
1201 | DK_objc_weak_lifetime, |
1202 | DK_nontrivial_c_struct |
1203 | }; |
1204 | |
1205 | /// Returns a nonzero value if objects of this type require |
1206 | /// non-trivial work to clean up after. Non-zero because it's |
1207 | /// conceivable that qualifiers (objc_gc(weak)?) could make |
1208 | /// something require destruction. |
1209 | DestructionKind isDestructedType() const { |
1210 | return isDestructedTypeImpl(*this); |
1211 | } |
1212 | |
1213 | /// Check if this is or contains a C union that is non-trivial to |
1214 | /// default-initialize, which is a union that has a member that is non-trivial |
1215 | /// to default-initialize. If this returns true, |
1216 | /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct. |
1217 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const; |
1218 | |
1219 | /// Check if this is or contains a C union that is non-trivial to destruct, |
1220 | /// which is a union that has a member that is non-trivial to destruct. If |
1221 | /// this returns true, isDestructedType returns DK_nontrivial_c_struct. |
1222 | bool hasNonTrivialToPrimitiveDestructCUnion() const; |
1223 | |
1224 | /// Check if this is or contains a C union that is non-trivial to copy, which |
1225 | /// is a union that has a member that is non-trivial to copy. If this returns |
1226 | /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct. |
1227 | bool hasNonTrivialToPrimitiveCopyCUnion() const; |
1228 | |
1229 | /// Determine whether expressions of the given type are forbidden |
1230 | /// from being lvalues in C. |
1231 | /// |
1232 | /// The expression types that are forbidden to be lvalues are: |
1233 | /// - 'void', but not qualified void |
1234 | /// - function types |
1235 | /// |
1236 | /// The exact rule here is C99 6.3.2.1: |
1237 | /// An lvalue is an expression with an object type or an incomplete |
1238 | /// type other than void. |
1239 | bool isCForbiddenLValueType() const; |
1240 | |
1241 | /// Substitute type arguments for the Objective-C type parameters used in the |
1242 | /// subject type. |
1243 | /// |
1244 | /// \param ctx ASTContext in which the type exists. |
1245 | /// |
1246 | /// \param typeArgs The type arguments that will be substituted for the |
1247 | /// Objective-C type parameters in the subject type, which are generally |
1248 | /// computed via \c Type::getObjCSubstitutions. If empty, the type |
1249 | /// parameters will be replaced with their bounds or id/Class, as appropriate |
1250 | /// for the context. |
1251 | /// |
1252 | /// \param context The context in which the subject type was written. |
1253 | /// |
1254 | /// \returns the resulting type. |
1255 | QualType substObjCTypeArgs(ASTContext &ctx, |
1256 | ArrayRef<QualType> typeArgs, |
1257 | ObjCSubstitutionContext context) const; |
1258 | |
1259 | /// Substitute type arguments from an object type for the Objective-C type |
1260 | /// parameters used in the subject type. |
1261 | /// |
1262 | /// This operation combines the computation of type arguments for |
1263 | /// substitution (\c Type::getObjCSubstitutions) with the actual process of |
1264 | /// substitution (\c QualType::substObjCTypeArgs) for the convenience of |
1265 | /// callers that need to perform a single substitution in isolation. |
1266 | /// |
1267 | /// \param objectType The type of the object whose member type we're |
1268 | /// substituting into. For example, this might be the receiver of a message |
1269 | /// or the base of a property access. |
1270 | /// |
1271 | /// \param dc The declaration context from which the subject type was |
1272 | /// retrieved, which indicates (for example) which type parameters should |
1273 | /// be substituted. |
1274 | /// |
1275 | /// \param context The context in which the subject type was written. |
1276 | /// |
1277 | /// \returns the subject type after replacing all of the Objective-C type |
1278 | /// parameters with their corresponding arguments. |
1279 | QualType substObjCMemberType(QualType objectType, |
1280 | const DeclContext *dc, |
1281 | ObjCSubstitutionContext context) const; |
1282 | |
1283 | /// Strip Objective-C "__kindof" types from the given type. |
1284 | QualType stripObjCKindOfType(const ASTContext &ctx) const; |
1285 | |
1286 | /// Remove all qualifiers including _Atomic. |
1287 | QualType getAtomicUnqualifiedType() const; |
1288 | |
1289 | private: |
1290 | // These methods are implemented in a separate translation unit; |
1291 | // "static"-ize them to avoid creating temporary QualTypes in the |
1292 | // caller. |
1293 | static bool isConstant(QualType T, const ASTContext& Ctx); |
1294 | static QualType getDesugaredType(QualType T, const ASTContext &Context); |
1295 | static SplitQualType getSplitDesugaredType(QualType T); |
1296 | static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); |
1297 | static QualType getSingleStepDesugaredTypeImpl(QualType type, |
1298 | const ASTContext &C); |
1299 | static QualType IgnoreParens(QualType T); |
1300 | static DestructionKind isDestructedTypeImpl(QualType type); |
1301 | |
1302 | /// Check if \param RD is or contains a non-trivial C union. |
1303 | static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD); |
1304 | static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD); |
1305 | static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD); |
1306 | }; |
1307 | |
1308 | } // namespace clang |
1309 | |
1310 | namespace llvm { |
1311 | |
1312 | /// Implement simplify_type for QualType, so that we can dyn_cast from QualType |
1313 | /// to a specific Type class. |
1314 | template<> struct simplify_type< ::clang::QualType> { |
1315 | using SimpleType = const ::clang::Type *; |
1316 | |
1317 | static SimpleType getSimplifiedValue(::clang::QualType Val) { |
1318 | return Val.getTypePtr(); |
1319 | } |
1320 | }; |
1321 | |
1322 | // Teach SmallPtrSet that QualType is "basically a pointer". |
1323 | template<> |
1324 | struct PointerLikeTypeTraits<clang::QualType> { |
1325 | static inline void *getAsVoidPointer(clang::QualType P) { |
1326 | return P.getAsOpaquePtr(); |
1327 | } |
1328 | |
1329 | static inline clang::QualType getFromVoidPointer(void *P) { |
1330 | return clang::QualType::getFromOpaquePtr(P); |
1331 | } |
1332 | |
1333 | // Various qualifiers go in low bits. |
1334 | static constexpr int NumLowBitsAvailable = 0; |
1335 | }; |
1336 | |
1337 | } // namespace llvm |
1338 | |
1339 | namespace clang { |
1340 | |
1341 | /// Base class that is common to both the \c ExtQuals and \c Type |
1342 | /// classes, which allows \c QualType to access the common fields between the |
1343 | /// two. |
1344 | class ExtQualsTypeCommonBase { |
1345 | friend class ExtQuals; |
1346 | friend class QualType; |
1347 | friend class Type; |
1348 | |
1349 | /// The "base" type of an extended qualifiers type (\c ExtQuals) or |
1350 | /// a self-referential pointer (for \c Type). |
1351 | /// |
1352 | /// This pointer allows an efficient mapping from a QualType to its |
1353 | /// underlying type pointer. |
1354 | const Type *const BaseType; |
1355 | |
1356 | /// The canonical type of this type. A QualType. |
1357 | QualType CanonicalType; |
1358 | |
1359 | ExtQualsTypeCommonBase(const Type *baseType, QualType canon) |
1360 | : BaseType(baseType), CanonicalType(canon) {} |
1361 | }; |
1362 | |
1363 | /// We can encode up to four bits in the low bits of a |
1364 | /// type pointer, but there are many more type qualifiers that we want |
1365 | /// to be able to apply to an arbitrary type. Therefore we have this |
1366 | /// struct, intended to be heap-allocated and used by QualType to |
1367 | /// store qualifiers. |
1368 | /// |
1369 | /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers |
1370 | /// in three low bits on the QualType pointer; a fourth bit records whether |
1371 | /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, |
1372 | /// Objective-C GC attributes) are much more rare. |
1373 | class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { |
1374 | // NOTE: changing the fast qualifiers should be straightforward as |
1375 | // long as you don't make 'const' non-fast. |
1376 | // 1. Qualifiers: |
1377 | // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). |
1378 | // Fast qualifiers must occupy the low-order bits. |
1379 | // b) Update Qualifiers::FastWidth and FastMask. |
1380 | // 2. QualType: |
1381 | // a) Update is{Volatile,Restrict}Qualified(), defined inline. |
1382 | // b) Update remove{Volatile,Restrict}, defined near the end of |
1383 | // this header. |
1384 | // 3. ASTContext: |
1385 | // a) Update get{Volatile,Restrict}Type. |
1386 | |
1387 | /// The immutable set of qualifiers applied by this node. Always contains |
1388 | /// extended qualifiers. |
1389 | Qualifiers Quals; |
1390 | |
1391 | ExtQuals *this_() { return this; } |
1392 | |
1393 | public: |
1394 | ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) |
1395 | : ExtQualsTypeCommonBase(baseType, |
1396 | canon.isNull() ? QualType(this_(), 0) : canon), |
1397 | Quals(quals) { |
1398 | assert(Quals.hasNonFastQualifiers()(static_cast <bool> (Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers") ? void (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 1399, __extension__ __PRETTY_FUNCTION__)) |
1399 | && "ExtQuals created with no fast qualifiers")(static_cast <bool> (Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers") ? void (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 1399, __extension__ __PRETTY_FUNCTION__)); |
1400 | assert(!Quals.hasFastQualifiers()(static_cast <bool> (!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 1401, __extension__ __PRETTY_FUNCTION__)) |
1401 | && "ExtQuals created with fast qualifiers")(static_cast <bool> (!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 1401, __extension__ __PRETTY_FUNCTION__)); |
1402 | } |
1403 | |
1404 | Qualifiers getQualifiers() const { return Quals; } |
1405 | |
1406 | bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } |
1407 | Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } |
1408 | |
1409 | bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } |
1410 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1411 | return Quals.getObjCLifetime(); |
1412 | } |
1413 | |
1414 | bool hasAddressSpace() const { return Quals.hasAddressSpace(); } |
1415 | LangAS getAddressSpace() const { return Quals.getAddressSpace(); } |
1416 | |
1417 | const Type *getBaseType() const { return BaseType; } |
1418 | |
1419 | public: |
1420 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1421 | Profile(ID, getBaseType(), Quals); |
1422 | } |
1423 | |
1424 | static void Profile(llvm::FoldingSetNodeID &ID, |
1425 | const Type *BaseType, |
1426 | Qualifiers Quals) { |
1427 | assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")(static_cast <bool> (!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!") ? void (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 1427, __extension__ __PRETTY_FUNCTION__)); |
1428 | ID.AddPointer(BaseType); |
1429 | Quals.Profile(ID); |
1430 | } |
1431 | }; |
1432 | |
1433 | /// The kind of C++11 ref-qualifier associated with a function type. |
1434 | /// This determines whether a member function's "this" object can be an |
1435 | /// lvalue, rvalue, or neither. |
1436 | enum RefQualifierKind { |
1437 | /// No ref-qualifier was provided. |
1438 | RQ_None = 0, |
1439 | |
1440 | /// An lvalue ref-qualifier was provided (\c &). |
1441 | RQ_LValue, |
1442 | |
1443 | /// An rvalue ref-qualifier was provided (\c &&). |
1444 | RQ_RValue |
1445 | }; |
1446 | |
1447 | /// Which keyword(s) were used to create an AutoType. |
1448 | enum class AutoTypeKeyword { |
1449 | /// auto |
1450 | Auto, |
1451 | |
1452 | /// decltype(auto) |
1453 | DecltypeAuto, |
1454 | |
1455 | /// __auto_type (GNU extension) |
1456 | GNUAutoType |
1457 | }; |
1458 | |
1459 | /// The base class of the type hierarchy. |
1460 | /// |
1461 | /// A central concept with types is that each type always has a canonical |
1462 | /// type. A canonical type is the type with any typedef names stripped out |
1463 | /// of it or the types it references. For example, consider: |
1464 | /// |
1465 | /// typedef int foo; |
1466 | /// typedef foo* bar; |
1467 | /// 'int *' 'foo *' 'bar' |
1468 | /// |
1469 | /// There will be a Type object created for 'int'. Since int is canonical, its |
1470 | /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a |
1471 | /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next |
1472 | /// there is a PointerType that represents 'int*', which, like 'int', is |
1473 | /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical |
1474 | /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type |
1475 | /// is also 'int*'. |
1476 | /// |
1477 | /// Non-canonical types are useful for emitting diagnostics, without losing |
1478 | /// information about typedefs being used. Canonical types are useful for type |
1479 | /// comparisons (they allow by-pointer equality tests) and useful for reasoning |
1480 | /// about whether something has a particular form (e.g. is a function type), |
1481 | /// because they implicitly, recursively, strip all typedefs out of a type. |
1482 | /// |
1483 | /// Types, once created, are immutable. |
1484 | /// |
1485 | class alignas(8) Type : public ExtQualsTypeCommonBase { |
1486 | public: |
1487 | enum TypeClass { |
1488 | #define TYPE(Class, Base) Class, |
1489 | #define LAST_TYPE(Class) TypeLast = Class |
1490 | #define ABSTRACT_TYPE(Class, Base) |
1491 | #include "clang/AST/TypeNodes.inc" |
1492 | }; |
1493 | |
1494 | private: |
1495 | /// Bitfields required by the Type class. |
1496 | class TypeBitfields { |
1497 | friend class Type; |
1498 | template <class T> friend class TypePropertyCache; |
1499 | |
1500 | /// TypeClass bitfield - Enum that specifies what subclass this belongs to. |
1501 | unsigned TC : 8; |
1502 | |
1503 | /// Store information on the type dependency. |
1504 | unsigned Dependence : llvm::BitWidth<TypeDependence>; |
1505 | |
1506 | /// True if the cache (i.e. the bitfields here starting with |
1507 | /// 'Cache') is valid. |
1508 | mutable unsigned CacheValid : 1; |
1509 | |
1510 | /// Linkage of this type. |
1511 | mutable unsigned CachedLinkage : 3; |
1512 | |
1513 | /// Whether this type involves and local or unnamed types. |
1514 | mutable unsigned CachedLocalOrUnnamed : 1; |
1515 | |
1516 | /// Whether this type comes from an AST file. |
1517 | mutable unsigned FromAST : 1; |
1518 | |
1519 | bool isCacheValid() const { |
1520 | return CacheValid; |
1521 | } |
1522 | |
1523 | Linkage getLinkage() const { |
1524 | assert(isCacheValid() && "getting linkage from invalid cache")(static_cast <bool> (isCacheValid() && "getting linkage from invalid cache" ) ? void (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 1524, __extension__ __PRETTY_FUNCTION__)); |
1525 | return static_cast<Linkage>(CachedLinkage); |
1526 | } |
1527 | |
1528 | bool hasLocalOrUnnamedType() const { |
1529 | assert(isCacheValid() && "getting linkage from invalid cache")(static_cast <bool> (isCacheValid() && "getting linkage from invalid cache" ) ? void (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 1529, __extension__ __PRETTY_FUNCTION__)); |
1530 | return CachedLocalOrUnnamed; |
1531 | } |
1532 | }; |
1533 | enum { NumTypeBits = 8 + llvm::BitWidth<TypeDependence> + 6 }; |
1534 | |
1535 | protected: |
1536 | // These classes allow subclasses to somewhat cleanly pack bitfields |
1537 | // into Type. |
1538 | |
1539 | class ArrayTypeBitfields { |
1540 | friend class ArrayType; |
1541 | |
1542 | unsigned : NumTypeBits; |
1543 | |
1544 | /// CVR qualifiers from declarations like |
1545 | /// 'int X[static restrict 4]'. For function parameters only. |
1546 | unsigned IndexTypeQuals : 3; |
1547 | |
1548 | /// Storage class qualifiers from declarations like |
1549 | /// 'int X[static restrict 4]'. For function parameters only. |
1550 | /// Actually an ArrayType::ArraySizeModifier. |
1551 | unsigned SizeModifier : 3; |
1552 | }; |
1553 | |
1554 | class ConstantArrayTypeBitfields { |
1555 | friend class ConstantArrayType; |
1556 | |
1557 | unsigned : NumTypeBits + 3 + 3; |
1558 | |
1559 | /// Whether we have a stored size expression. |
1560 | unsigned HasStoredSizeExpr : 1; |
1561 | }; |
1562 | |
1563 | class BuiltinTypeBitfields { |
1564 | friend class BuiltinType; |
1565 | |
1566 | unsigned : NumTypeBits; |
1567 | |
1568 | /// The kind (BuiltinType::Kind) of builtin type this is. |
1569 | unsigned Kind : 8; |
1570 | }; |
1571 | |
1572 | /// FunctionTypeBitfields store various bits belonging to FunctionProtoType. |
1573 | /// Only common bits are stored here. Additional uncommon bits are stored |
1574 | /// in a trailing object after FunctionProtoType. |
1575 | class FunctionTypeBitfields { |
1576 | friend class FunctionProtoType; |
1577 | friend class FunctionType; |
1578 | |
1579 | unsigned : NumTypeBits; |
1580 | |
1581 | /// Extra information which affects how the function is called, like |
1582 | /// regparm and the calling convention. |
1583 | unsigned ExtInfo : 13; |
1584 | |
1585 | /// The ref-qualifier associated with a \c FunctionProtoType. |
1586 | /// |
1587 | /// This is a value of type \c RefQualifierKind. |
1588 | unsigned RefQualifier : 2; |
1589 | |
1590 | /// Used only by FunctionProtoType, put here to pack with the |
1591 | /// other bitfields. |
1592 | /// The qualifiers are part of FunctionProtoType because... |
1593 | /// |
1594 | /// C++ 8.3.5p4: The return type, the parameter type list and the |
1595 | /// cv-qualifier-seq, [...], are part of the function type. |
1596 | unsigned FastTypeQuals : Qualifiers::FastWidth; |
1597 | /// Whether this function has extended Qualifiers. |
1598 | unsigned HasExtQuals : 1; |
1599 | |
1600 | /// The number of parameters this function has, not counting '...'. |
1601 | /// According to [implimits] 8 bits should be enough here but this is |
1602 | /// somewhat easy to exceed with metaprogramming and so we would like to |
1603 | /// keep NumParams as wide as reasonably possible. |
1604 | unsigned NumParams : 16; |
1605 | |
1606 | /// The type of exception specification this function has. |
1607 | unsigned ExceptionSpecType : 4; |
1608 | |
1609 | /// Whether this function has extended parameter information. |
1610 | unsigned HasExtParameterInfos : 1; |
1611 | |
1612 | /// Whether the function is variadic. |
1613 | unsigned Variadic : 1; |
1614 | |
1615 | /// Whether this function has a trailing return type. |
1616 | unsigned HasTrailingReturn : 1; |
1617 | }; |
1618 | |
1619 | class ObjCObjectTypeBitfields { |
1620 | friend class ObjCObjectType; |
1621 | |
1622 | unsigned : NumTypeBits; |
1623 | |
1624 | /// The number of type arguments stored directly on this object type. |
1625 | unsigned NumTypeArgs : 7; |
1626 | |
1627 | /// The number of protocols stored directly on this object type. |
1628 | unsigned NumProtocols : 6; |
1629 | |
1630 | /// Whether this is a "kindof" type. |
1631 | unsigned IsKindOf : 1; |
1632 | }; |
1633 | |
1634 | class ReferenceTypeBitfields { |
1635 | friend class ReferenceType; |
1636 | |
1637 | unsigned : NumTypeBits; |
1638 | |
1639 | /// True if the type was originally spelled with an lvalue sigil. |
1640 | /// This is never true of rvalue references but can also be false |
1641 | /// on lvalue references because of C++0x [dcl.typedef]p9, |
1642 | /// as follows: |
1643 | /// |
1644 | /// typedef int &ref; // lvalue, spelled lvalue |
1645 | /// typedef int &&rvref; // rvalue |
1646 | /// ref &a; // lvalue, inner ref, spelled lvalue |
1647 | /// ref &&a; // lvalue, inner ref |
1648 | /// rvref &a; // lvalue, inner ref, spelled lvalue |
1649 | /// rvref &&a; // rvalue, inner ref |
1650 | unsigned SpelledAsLValue : 1; |
1651 | |
1652 | /// True if the inner type is a reference type. This only happens |
1653 | /// in non-canonical forms. |
1654 | unsigned InnerRef : 1; |
1655 | }; |
1656 | |
1657 | class TypeWithKeywordBitfields { |
1658 | friend class TypeWithKeyword; |
1659 | |
1660 | unsigned : NumTypeBits; |
1661 | |
1662 | /// An ElaboratedTypeKeyword. 8 bits for efficient access. |
1663 | unsigned Keyword : 8; |
1664 | }; |
1665 | |
1666 | enum { NumTypeWithKeywordBits = 8 }; |
1667 | |
1668 | class ElaboratedTypeBitfields { |
1669 | friend class ElaboratedType; |
1670 | |
1671 | unsigned : NumTypeBits; |
1672 | unsigned : NumTypeWithKeywordBits; |
1673 | |
1674 | /// Whether the ElaboratedType has a trailing OwnedTagDecl. |
1675 | unsigned HasOwnedTagDecl : 1; |
1676 | }; |
1677 | |
1678 | class VectorTypeBitfields { |
1679 | friend class VectorType; |
1680 | friend class DependentVectorType; |
1681 | |
1682 | unsigned : NumTypeBits; |
1683 | |
1684 | /// The kind of vector, either a generic vector type or some |
1685 | /// target-specific vector type such as for AltiVec or Neon. |
1686 | unsigned VecKind : 3; |
1687 | /// The number of elements in the vector. |
1688 | uint32_t NumElements; |
1689 | }; |
1690 | |
1691 | class AttributedTypeBitfields { |
1692 | friend class AttributedType; |
1693 | |
1694 | unsigned : NumTypeBits; |
1695 | |
1696 | /// An AttributedType::Kind |
1697 | unsigned AttrKind : 32 - NumTypeBits; |
1698 | }; |
1699 | |
1700 | class AutoTypeBitfields { |
1701 | friend class AutoType; |
1702 | |
1703 | unsigned : NumTypeBits; |
1704 | |
1705 | /// Was this placeholder type spelled as 'auto', 'decltype(auto)', |
1706 | /// or '__auto_type'? AutoTypeKeyword value. |
1707 | unsigned Keyword : 2; |
1708 | |
1709 | /// The number of template arguments in the type-constraints, which is |
1710 | /// expected to be able to hold at least 1024 according to [implimits]. |
1711 | /// However as this limit is somewhat easy to hit with template |
1712 | /// metaprogramming we'd prefer to keep it as large as possible. |
1713 | /// At the moment it has been left as a non-bitfield since this type |
1714 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1715 | /// introduce the performance impact of a bitfield. |
1716 | unsigned NumArgs; |
1717 | }; |
1718 | |
1719 | class SubstTemplateTypeParmPackTypeBitfields { |
1720 | friend class SubstTemplateTypeParmPackType; |
1721 | |
1722 | unsigned : NumTypeBits; |
1723 | |
1724 | /// The number of template arguments in \c Arguments, which is |
1725 | /// expected to be able to hold at least 1024 according to [implimits]. |
1726 | /// However as this limit is somewhat easy to hit with template |
1727 | /// metaprogramming we'd prefer to keep it as large as possible. |
1728 | /// At the moment it has been left as a non-bitfield since this type |
1729 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1730 | /// introduce the performance impact of a bitfield. |
1731 | unsigned NumArgs; |
1732 | }; |
1733 | |
1734 | class TemplateSpecializationTypeBitfields { |
1735 | friend class TemplateSpecializationType; |
1736 | |
1737 | unsigned : NumTypeBits; |
1738 | |
1739 | /// Whether this template specialization type is a substituted type alias. |
1740 | unsigned TypeAlias : 1; |
1741 | |
1742 | /// The number of template arguments named in this class template |
1743 | /// specialization, which is expected to be able to hold at least 1024 |
1744 | /// according to [implimits]. However, as this limit is somewhat easy to |
1745 | /// hit with template metaprogramming we'd prefer to keep it as large |
1746 | /// as possible. At the moment it has been left as a non-bitfield since |
1747 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1748 | /// to introduce the performance impact of a bitfield. |
1749 | unsigned NumArgs; |
1750 | }; |
1751 | |
1752 | class DependentTemplateSpecializationTypeBitfields { |
1753 | friend class DependentTemplateSpecializationType; |
1754 | |
1755 | unsigned : NumTypeBits; |
1756 | unsigned : NumTypeWithKeywordBits; |
1757 | |
1758 | /// The number of template arguments named in this class template |
1759 | /// specialization, which is expected to be able to hold at least 1024 |
1760 | /// according to [implimits]. However, as this limit is somewhat easy to |
1761 | /// hit with template metaprogramming we'd prefer to keep it as large |
1762 | /// as possible. At the moment it has been left as a non-bitfield since |
1763 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1764 | /// to introduce the performance impact of a bitfield. |
1765 | unsigned NumArgs; |
1766 | }; |
1767 | |
1768 | class PackExpansionTypeBitfields { |
1769 | friend class PackExpansionType; |
1770 | |
1771 | unsigned : NumTypeBits; |
1772 | |
1773 | /// The number of expansions that this pack expansion will |
1774 | /// generate when substituted (+1), which is expected to be able to |
1775 | /// hold at least 1024 according to [implimits]. However, as this limit |
1776 | /// is somewhat easy to hit with template metaprogramming we'd prefer to |
1777 | /// keep it as large as possible. At the moment it has been left as a |
1778 | /// non-bitfield since this type safely fits in 64 bits as an unsigned, so |
1779 | /// there is no reason to introduce the performance impact of a bitfield. |
1780 | /// |
1781 | /// This field will only have a non-zero value when some of the parameter |
1782 | /// packs that occur within the pattern have been substituted but others |
1783 | /// have not. |
1784 | unsigned NumExpansions; |
1785 | }; |
1786 | |
1787 | union { |
1788 | TypeBitfields TypeBits; |
1789 | ArrayTypeBitfields ArrayTypeBits; |
1790 | ConstantArrayTypeBitfields ConstantArrayTypeBits; |
1791 | AttributedTypeBitfields AttributedTypeBits; |
1792 | AutoTypeBitfields AutoTypeBits; |
1793 | BuiltinTypeBitfields BuiltinTypeBits; |
1794 | FunctionTypeBitfields FunctionTypeBits; |
1795 | ObjCObjectTypeBitfields ObjCObjectTypeBits; |
1796 | ReferenceTypeBitfields ReferenceTypeBits; |
1797 | TypeWithKeywordBitfields TypeWithKeywordBits; |
1798 | ElaboratedTypeBitfields ElaboratedTypeBits; |
1799 | VectorTypeBitfields VectorTypeBits; |
1800 | SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits; |
1801 | TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits; |
1802 | DependentTemplateSpecializationTypeBitfields |
1803 | DependentTemplateSpecializationTypeBits; |
1804 | PackExpansionTypeBitfields PackExpansionTypeBits; |
1805 | }; |
1806 | |
1807 | private: |
1808 | template <class T> friend class TypePropertyCache; |
1809 | |
1810 | /// Set whether this type comes from an AST file. |
1811 | void setFromAST(bool V = true) const { |
1812 | TypeBits.FromAST = V; |
1813 | } |
1814 | |
1815 | protected: |
1816 | friend class ASTContext; |
1817 | |
1818 | Type(TypeClass tc, QualType canon, TypeDependence Dependence) |
1819 | : ExtQualsTypeCommonBase(this, |
1820 | canon.isNull() ? QualType(this_(), 0) : canon) { |
1821 | static_assert(sizeof(*this) <= 8 + sizeof(ExtQualsTypeCommonBase), |
1822 | "changing bitfields changed sizeof(Type)!"); |
1823 | static_assert(alignof(decltype(*this)) % sizeof(void *) == 0, |
1824 | "Insufficient alignment!"); |
1825 | TypeBits.TC = tc; |
1826 | TypeBits.Dependence = static_cast<unsigned>(Dependence); |
1827 | TypeBits.CacheValid = false; |
1828 | TypeBits.CachedLocalOrUnnamed = false; |
1829 | TypeBits.CachedLinkage = NoLinkage; |
1830 | TypeBits.FromAST = false; |
1831 | } |
1832 | |
1833 | // silence VC++ warning C4355: 'this' : used in base member initializer list |
1834 | Type *this_() { return this; } |
1835 | |
1836 | void setDependence(TypeDependence D) { |
1837 | TypeBits.Dependence = static_cast<unsigned>(D); |
1838 | } |
1839 | |
1840 | void addDependence(TypeDependence D) { setDependence(getDependence() | D); } |
1841 | |
1842 | public: |
1843 | friend class ASTReader; |
1844 | friend class ASTWriter; |
1845 | template <class T> friend class serialization::AbstractTypeReader; |
1846 | template <class T> friend class serialization::AbstractTypeWriter; |
1847 | |
1848 | Type(const Type &) = delete; |
1849 | Type(Type &&) = delete; |
1850 | Type &operator=(const Type &) = delete; |
1851 | Type &operator=(Type &&) = delete; |
1852 | |
1853 | TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } |
1854 | |
1855 | /// Whether this type comes from an AST file. |
1856 | bool isFromAST() const { return TypeBits.FromAST; } |
1857 | |
1858 | /// Whether this type is or contains an unexpanded parameter |
1859 | /// pack, used to support C++0x variadic templates. |
1860 | /// |
1861 | /// A type that contains a parameter pack shall be expanded by the |
1862 | /// ellipsis operator at some point. For example, the typedef in the |
1863 | /// following example contains an unexpanded parameter pack 'T': |
1864 | /// |
1865 | /// \code |
1866 | /// template<typename ...T> |
1867 | /// struct X { |
1868 | /// typedef T* pointer_types; // ill-formed; T is a parameter pack. |
1869 | /// }; |
1870 | /// \endcode |
1871 | /// |
1872 | /// Note that this routine does not specify which |
1873 | bool containsUnexpandedParameterPack() const { |
1874 | return getDependence() & TypeDependence::UnexpandedPack; |
1875 | } |
1876 | |
1877 | /// Determines if this type would be canonical if it had no further |
1878 | /// qualification. |
1879 | bool isCanonicalUnqualified() const { |
1880 | return CanonicalType == QualType(this, 0); |
1881 | } |
1882 | |
1883 | /// Pull a single level of sugar off of this locally-unqualified type. |
1884 | /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() |
1885 | /// or QualType::getSingleStepDesugaredType(const ASTContext&). |
1886 | QualType getLocallyUnqualifiedSingleStepDesugaredType() const; |
1887 | |
1888 | /// As an extension, we classify types as one of "sized" or "sizeless"; |
1889 | /// every type is one or the other. Standard types are all sized; |
1890 | /// sizeless types are purely an extension. |
1891 | /// |
1892 | /// Sizeless types contain data with no specified size, alignment, |
1893 | /// or layout. |
1894 | bool isSizelessType() const; |
1895 | bool isSizelessBuiltinType() const; |
1896 | |
1897 | /// Determines if this is a sizeless type supported by the |
1898 | /// 'arm_sve_vector_bits' type attribute, which can be applied to a single |
1899 | /// SVE vector or predicate, excluding tuple types such as svint32x4_t. |
1900 | bool isVLSTBuiltinType() const; |
1901 | |
1902 | /// Returns the representative type for the element of an SVE builtin type. |
1903 | /// This is used to represent fixed-length SVE vectors created with the |
1904 | /// 'arm_sve_vector_bits' type attribute as VectorType. |
1905 | QualType getSveEltType(const ASTContext &Ctx) const; |
1906 | |
1907 | /// Types are partitioned into 3 broad categories (C99 6.2.5p1): |
1908 | /// object types, function types, and incomplete types. |
1909 | |
1910 | /// Return true if this is an incomplete type. |
1911 | /// A type that can describe objects, but which lacks information needed to |
1912 | /// determine its size (e.g. void, or a fwd declared struct). Clients of this |
1913 | /// routine will need to determine if the size is actually required. |
1914 | /// |
1915 | /// Def If non-null, and the type refers to some kind of declaration |
1916 | /// that can be completed (such as a C struct, C++ class, or Objective-C |
1917 | /// class), will be set to the declaration. |
1918 | bool isIncompleteType(NamedDecl **Def = nullptr) const; |
1919 | |
1920 | /// Return true if this is an incomplete or object |
1921 | /// type, in other words, not a function type. |
1922 | bool isIncompleteOrObjectType() const { |
1923 | return !isFunctionType(); |
1924 | } |
1925 | |
1926 | /// Determine whether this type is an object type. |
1927 | bool isObjectType() const { |
1928 | // C++ [basic.types]p8: |
1929 | // An object type is a (possibly cv-qualified) type that is not a |
1930 | // function type, not a reference type, and not a void type. |
1931 | return !isReferenceType() && !isFunctionType() && !isVoidType(); |
1932 | } |
1933 | |
1934 | /// Return true if this is a literal type |
1935 | /// (C++11 [basic.types]p10) |
1936 | bool isLiteralType(const ASTContext &Ctx) const; |
1937 | |
1938 | /// Determine if this type is a structural type, per C++20 [temp.param]p7. |
1939 | bool isStructuralType() const; |
1940 | |
1941 | /// Test if this type is a standard-layout type. |
1942 | /// (C++0x [basic.type]p9) |
1943 | bool isStandardLayoutType() const; |
1944 | |
1945 | /// Helper methods to distinguish type categories. All type predicates |
1946 | /// operate on the canonical type, ignoring typedefs and qualifiers. |
1947 | |
1948 | /// Returns true if the type is a builtin type. |
1949 | bool isBuiltinType() const; |
1950 | |
1951 | /// Test for a particular builtin type. |
1952 | bool isSpecificBuiltinType(unsigned K) const; |
1953 | |
1954 | /// Test for a type which does not represent an actual type-system type but |
1955 | /// is instead used as a placeholder for various convenient purposes within |
1956 | /// Clang. All such types are BuiltinTypes. |
1957 | bool isPlaceholderType() const; |
1958 | const BuiltinType *getAsPlaceholderType() const; |
1959 | |
1960 | /// Test for a specific placeholder type. |
1961 | bool isSpecificPlaceholderType(unsigned K) const; |
1962 | |
1963 | /// Test for a placeholder type other than Overload; see |
1964 | /// BuiltinType::isNonOverloadPlaceholderType. |
1965 | bool isNonOverloadPlaceholderType() const; |
1966 | |
1967 | /// isIntegerType() does *not* include complex integers (a GCC extension). |
1968 | /// isComplexIntegerType() can be used to test for complex integers. |
1969 | bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) |
1970 | bool isEnumeralType() const; |
1971 | |
1972 | /// Determine whether this type is a scoped enumeration type. |
1973 | bool isScopedEnumeralType() const; |
1974 | bool isBooleanType() const; |
1975 | bool isCharType() const; |
1976 | bool isWideCharType() const; |
1977 | bool isChar8Type() const; |
1978 | bool isChar16Type() const; |
1979 | bool isChar32Type() const; |
1980 | bool isAnyCharacterType() const; |
1981 | bool isIntegralType(const ASTContext &Ctx) const; |
1982 | |
1983 | /// Determine whether this type is an integral or enumeration type. |
1984 | bool isIntegralOrEnumerationType() const; |
1985 | |
1986 | /// Determine whether this type is an integral or unscoped enumeration type. |
1987 | bool isIntegralOrUnscopedEnumerationType() const; |
1988 | bool isUnscopedEnumerationType() const; |
1989 | |
1990 | /// Floating point categories. |
1991 | bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) |
1992 | /// isComplexType() does *not* include complex integers (a GCC extension). |
1993 | /// isComplexIntegerType() can be used to test for complex integers. |
1994 | bool isComplexType() const; // C99 6.2.5p11 (complex) |
1995 | bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. |
1996 | bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) |
1997 | bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) |
1998 | bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661 |
1999 | bool isBFloat16Type() const; |
2000 | bool isFloat128Type() const; |
2001 | bool isRealType() const; // C99 6.2.5p17 (real floating + integer) |
2002 | bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) |
2003 | bool isVoidType() const; // C99 6.2.5p19 |
2004 | bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) |
2005 | bool isAggregateType() const; |
2006 | bool isFundamentalType() const; |
2007 | bool isCompoundType() const; |
2008 | |
2009 | // Type Predicates: Check to see if this type is structurally the specified |
2010 | // type, ignoring typedefs and qualifiers. |
2011 | bool isFunctionType() const; |
2012 | bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } |
2013 | bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } |
2014 | bool isPointerType() const; |
2015 | bool isAnyPointerType() const; // Any C pointer or ObjC object pointer |
2016 | bool isBlockPointerType() const; |
2017 | bool isVoidPointerType() const; |
2018 | bool isReferenceType() const; |
2019 | bool isLValueReferenceType() const; |
2020 | bool isRValueReferenceType() const; |
2021 | bool isObjectPointerType() const; |
2022 | bool isFunctionPointerType() const; |
2023 | bool isFunctionReferenceType() const; |
2024 | bool isMemberPointerType() const; |
2025 | bool isMemberFunctionPointerType() const; |
2026 | bool isMemberDataPointerType() const; |
2027 | bool isArrayType() const; |
2028 | bool isConstantArrayType() const; |
2029 | bool isIncompleteArrayType() const; |
2030 | bool isVariableArrayType() const; |
2031 | bool isDependentSizedArrayType() const; |
2032 | bool isRecordType() const; |
2033 | bool isClassType() const; |
2034 | bool isStructureType() const; |
2035 | bool isObjCBoxableRecordType() const; |
2036 | bool isInterfaceType() const; |
2037 | bool isStructureOrClassType() const; |
2038 | bool isUnionType() const; |
2039 | bool isComplexIntegerType() const; // GCC _Complex integer type. |
2040 | bool isVectorType() const; // GCC vector type. |
2041 | bool isExtVectorType() const; // Extended vector type. |
2042 | bool isMatrixType() const; // Matrix type. |
2043 | bool isConstantMatrixType() const; // Constant matrix type. |
2044 | bool isDependentAddressSpaceType() const; // value-dependent address space qualifier |
2045 | bool isObjCObjectPointerType() const; // pointer to ObjC object |
2046 | bool isObjCRetainableType() const; // ObjC object or block pointer |
2047 | bool isObjCLifetimeType() const; // (array of)* retainable type |
2048 | bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type |
2049 | bool isObjCNSObjectType() const; // __attribute__((NSObject)) |
2050 | bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class)) |
2051 | // FIXME: change this to 'raw' interface type, so we can used 'interface' type |
2052 | // for the common case. |
2053 | bool isObjCObjectType() const; // NSString or typeof(*(id)0) |
2054 | bool isObjCQualifiedInterfaceType() const; // NSString<foo> |
2055 | bool isObjCQualifiedIdType() const; // id<foo> |
2056 | bool isObjCQualifiedClassType() const; // Class<foo> |
2057 | bool isObjCObjectOrInterfaceType() const; |
2058 | bool isObjCIdType() const; // id |
2059 | bool isDecltypeType() const; |
2060 | /// Was this type written with the special inert-in-ARC __unsafe_unretained |
2061 | /// qualifier? |
2062 | /// |
2063 | /// This approximates the answer to the following question: if this |
2064 | /// translation unit were compiled in ARC, would this type be qualified |
2065 | /// with __unsafe_unretained? |
2066 | bool isObjCInertUnsafeUnretainedType() const { |
2067 | return hasAttr(attr::ObjCInertUnsafeUnretained); |
2068 | } |
2069 | |
2070 | /// Whether the type is Objective-C 'id' or a __kindof type of an |
2071 | /// object type, e.g., __kindof NSView * or __kindof id |
2072 | /// <NSCopying>. |
2073 | /// |
2074 | /// \param bound Will be set to the bound on non-id subtype types, |
2075 | /// which will be (possibly specialized) Objective-C class type, or |
2076 | /// null for 'id. |
2077 | bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, |
2078 | const ObjCObjectType *&bound) const; |
2079 | |
2080 | bool isObjCClassType() const; // Class |
2081 | |
2082 | /// Whether the type is Objective-C 'Class' or a __kindof type of an |
2083 | /// Class type, e.g., __kindof Class <NSCopying>. |
2084 | /// |
2085 | /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound |
2086 | /// here because Objective-C's type system cannot express "a class |
2087 | /// object for a subclass of NSFoo". |
2088 | bool isObjCClassOrClassKindOfType() const; |
2089 | |
2090 | bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const; |
2091 | bool isObjCSelType() const; // Class |
2092 | bool isObjCBuiltinType() const; // 'id' or 'Class' |
2093 | bool isObjCARCBridgableType() const; |
2094 | bool isCARCBridgableType() const; |
2095 | bool isTemplateTypeParmType() const; // C++ template type parameter |
2096 | bool isNullPtrType() const; // C++11 std::nullptr_t |
2097 | bool isNothrowT() const; // C++ std::nothrow_t |
2098 | bool isAlignValT() const; // C++17 std::align_val_t |
2099 | bool isStdByteType() const; // C++17 std::byte |
2100 | bool isAtomicType() const; // C11 _Atomic() |
2101 | bool isUndeducedAutoType() const; // C++11 auto or |
2102 | // C++14 decltype(auto) |
2103 | bool isTypedefNameType() const; // typedef or alias template |
2104 | |
2105 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
2106 | bool is##Id##Type() const; |
2107 | #include "clang/Basic/OpenCLImageTypes.def" |
2108 | |
2109 | bool isImageType() const; // Any OpenCL image type |
2110 | |
2111 | bool isSamplerT() const; // OpenCL sampler_t |
2112 | bool isEventT() const; // OpenCL event_t |
2113 | bool isClkEventT() const; // OpenCL clk_event_t |
2114 | bool isQueueT() const; // OpenCL queue_t |
2115 | bool isReserveIDT() const; // OpenCL reserve_id_t |
2116 | |
2117 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
2118 | bool is##Id##Type() const; |
2119 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2120 | // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension |
2121 | bool isOCLIntelSubgroupAVCType() const; |
2122 | bool isOCLExtOpaqueType() const; // Any OpenCL extension type |
2123 | |
2124 | bool isPipeType() const; // OpenCL pipe type |
2125 | bool isExtIntType() const; // Extended Int Type |
2126 | bool isOpenCLSpecificType() const; // Any OpenCL specific type |
2127 | |
2128 | /// Determines if this type, which must satisfy |
2129 | /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather |
2130 | /// than implicitly __strong. |
2131 | bool isObjCARCImplicitlyUnretainedType() const; |
2132 | |
2133 | /// Check if the type is the CUDA device builtin surface type. |
2134 | bool isCUDADeviceBuiltinSurfaceType() const; |
2135 | /// Check if the type is the CUDA device builtin texture type. |
2136 | bool isCUDADeviceBuiltinTextureType() const; |
2137 | |
2138 | /// Return the implicit lifetime for this type, which must not be dependent. |
2139 | Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; |
2140 | |
2141 | enum ScalarTypeKind { |
2142 | STK_CPointer, |
2143 | STK_BlockPointer, |
2144 | STK_ObjCObjectPointer, |
2145 | STK_MemberPointer, |
2146 | STK_Bool, |
2147 | STK_Integral, |
2148 | STK_Floating, |
2149 | STK_IntegralComplex, |
2150 | STK_FloatingComplex, |
2151 | STK_FixedPoint |
2152 | }; |
2153 | |
2154 | /// Given that this is a scalar type, classify it. |
2155 | ScalarTypeKind getScalarTypeKind() const; |
2156 | |
2157 | TypeDependence getDependence() const { |
2158 | return static_cast<TypeDependence>(TypeBits.Dependence); |
2159 | } |
2160 | |
2161 | /// Whether this type is an error type. |
2162 | bool containsErrors() const { |
2163 | return getDependence() & TypeDependence::Error; |
2164 | } |
2165 | |
2166 | /// Whether this type is a dependent type, meaning that its definition |
2167 | /// somehow depends on a template parameter (C++ [temp.dep.type]). |
2168 | bool isDependentType() const { |
2169 | return getDependence() & TypeDependence::Dependent; |
2170 | } |
2171 | |
2172 | /// Determine whether this type is an instantiation-dependent type, |
2173 | /// meaning that the type involves a template parameter (even if the |
2174 | /// definition does not actually depend on the type substituted for that |
2175 | /// template parameter). |
2176 | bool isInstantiationDependentType() const { |
2177 | return getDependence() & TypeDependence::Instantiation; |
2178 | } |
2179 | |
2180 | /// Determine whether this type is an undeduced type, meaning that |
2181 | /// it somehow involves a C++11 'auto' type or similar which has not yet been |
2182 | /// deduced. |
2183 | bool isUndeducedType() const; |
2184 | |
2185 | /// Whether this type is a variably-modified type (C99 6.7.5). |
2186 | bool isVariablyModifiedType() const { |
2187 | return getDependence() & TypeDependence::VariablyModified; |
2188 | } |
2189 | |
2190 | /// Whether this type involves a variable-length array type |
2191 | /// with a definite size. |
2192 | bool hasSizedVLAType() const; |
2193 | |
2194 | /// Whether this type is or contains a local or unnamed type. |
2195 | bool hasUnnamedOrLocalType() const; |
2196 | |
2197 | bool isOverloadableType() const; |
2198 | |
2199 | /// Determine wither this type is a C++ elaborated-type-specifier. |
2200 | bool isElaboratedTypeSpecifier() const; |
2201 | |
2202 | bool canDecayToPointerType() const; |
2203 | |
2204 | /// Whether this type is represented natively as a pointer. This includes |
2205 | /// pointers, references, block pointers, and Objective-C interface, |
2206 | /// qualified id, and qualified interface types, as well as nullptr_t. |
2207 | bool hasPointerRepresentation() const; |
2208 | |
2209 | /// Whether this type can represent an objective pointer type for the |
2210 | /// purpose of GC'ability |
2211 | bool hasObjCPointerRepresentation() const; |
2212 | |
2213 | /// Determine whether this type has an integer representation |
2214 | /// of some sort, e.g., it is an integer type or a vector. |
2215 | bool hasIntegerRepresentation() const; |
2216 | |
2217 | /// Determine whether this type has an signed integer representation |
2218 | /// of some sort, e.g., it is an signed integer type or a vector. |
2219 | bool hasSignedIntegerRepresentation() const; |
2220 | |
2221 | /// Determine whether this type has an unsigned integer representation |
2222 | /// of some sort, e.g., it is an unsigned integer type or a vector. |
2223 | bool hasUnsignedIntegerRepresentation() const; |
2224 | |
2225 | /// Determine whether this type has a floating-point representation |
2226 | /// of some sort, e.g., it is a floating-point type or a vector thereof. |
2227 | bool hasFloatingRepresentation() const; |
2228 | |
2229 | // Type Checking Functions: Check to see if this type is structurally the |
2230 | // specified type, ignoring typedefs and qualifiers, and return a pointer to |
2231 | // the best type we can. |
2232 | const RecordType *getAsStructureType() const; |
2233 | /// NOTE: getAs*ArrayType are methods on ASTContext. |
2234 | const RecordType *getAsUnionType() const; |
2235 | const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. |
2236 | const ObjCObjectType *getAsObjCInterfaceType() const; |
2237 | |
2238 | // The following is a convenience method that returns an ObjCObjectPointerType |
2239 | // for object declared using an interface. |
2240 | const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; |
2241 | const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; |
2242 | const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; |
2243 | const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; |
2244 | |
2245 | /// Retrieves the CXXRecordDecl that this type refers to, either |
2246 | /// because the type is a RecordType or because it is the injected-class-name |
2247 | /// type of a class template or class template partial specialization. |
2248 | CXXRecordDecl *getAsCXXRecordDecl() const; |
2249 | |
2250 | /// Retrieves the RecordDecl this type refers to. |
2251 | RecordDecl *getAsRecordDecl() const; |
2252 | |
2253 | /// Retrieves the TagDecl that this type refers to, either |
2254 | /// because the type is a TagType or because it is the injected-class-name |
2255 | /// type of a class template or class template partial specialization. |
2256 | TagDecl *getAsTagDecl() const; |
2257 | |
2258 | /// If this is a pointer or reference to a RecordType, return the |
2259 | /// CXXRecordDecl that the type refers to. |
2260 | /// |
2261 | /// If this is not a pointer or reference, or the type being pointed to does |
2262 | /// not refer to a CXXRecordDecl, returns NULL. |
2263 | const CXXRecordDecl *getPointeeCXXRecordDecl() const; |
2264 | |
2265 | /// Get the DeducedType whose type will be deduced for a variable with |
2266 | /// an initializer of this type. This looks through declarators like pointer |
2267 | /// types, but not through decltype or typedefs. |
2268 | DeducedType *getContainedDeducedType() const; |
2269 | |
2270 | /// Get the AutoType whose type will be deduced for a variable with |
2271 | /// an initializer of this type. This looks through declarators like pointer |
2272 | /// types, but not through decltype or typedefs. |
2273 | AutoType *getContainedAutoType() const { |
2274 | return dyn_cast_or_null<AutoType>(getContainedDeducedType()); |
2275 | } |
2276 | |
2277 | /// Determine whether this type was written with a leading 'auto' |
2278 | /// corresponding to a trailing return type (possibly for a nested |
2279 | /// function type within a pointer to function type or similar). |
2280 | bool hasAutoForTrailingReturnType() const; |
2281 | |
2282 | /// Member-template getAs<specific type>'. Look through sugar for |
2283 | /// an instance of \<specific type>. This scheme will eventually |
2284 | /// replace the specific getAsXXXX methods above. |
2285 | /// |
2286 | /// There are some specializations of this member template listed |
2287 | /// immediately following this class. |
2288 | template <typename T> const T *getAs() const; |
2289 | |
2290 | /// Member-template getAsAdjusted<specific type>. Look through specific kinds |
2291 | /// of sugar (parens, attributes, etc) for an instance of \<specific type>. |
2292 | /// This is used when you need to walk over sugar nodes that represent some |
2293 | /// kind of type adjustment from a type that was written as a \<specific type> |
2294 | /// to another type that is still canonically a \<specific type>. |
2295 | template <typename T> const T *getAsAdjusted() const; |
2296 | |
2297 | /// A variant of getAs<> for array types which silently discards |
2298 | /// qualifiers from the outermost type. |
2299 | const ArrayType *getAsArrayTypeUnsafe() const; |
2300 | |
2301 | /// Member-template castAs<specific type>. Look through sugar for |
2302 | /// the underlying instance of \<specific type>. |
2303 | /// |
2304 | /// This method has the same relationship to getAs<T> as cast<T> has |
2305 | /// to dyn_cast<T>; which is to say, the underlying type *must* |
2306 | /// have the intended type, and this method will never return null. |
2307 | template <typename T> const T *castAs() const; |
2308 | |
2309 | /// A variant of castAs<> for array type which silently discards |
2310 | /// qualifiers from the outermost type. |
2311 | const ArrayType *castAsArrayTypeUnsafe() const; |
2312 | |
2313 | /// Determine whether this type had the specified attribute applied to it |
2314 | /// (looking through top-level type sugar). |
2315 | bool hasAttr(attr::Kind AK) const; |
2316 | |
2317 | /// Get the base element type of this type, potentially discarding type |
2318 | /// qualifiers. This should never be used when type qualifiers |
2319 | /// are meaningful. |
2320 | const Type *getBaseElementTypeUnsafe() const; |
2321 | |
2322 | /// If this is an array type, return the element type of the array, |
2323 | /// potentially with type qualifiers missing. |
2324 | /// This should never be used when type qualifiers are meaningful. |
2325 | const Type *getArrayElementTypeNoTypeQual() const; |
2326 | |
2327 | /// If this is a pointer type, return the pointee type. |
2328 | /// If this is an array type, return the array element type. |
2329 | /// This should never be used when type qualifiers are meaningful. |
2330 | const Type *getPointeeOrArrayElementType() const; |
2331 | |
2332 | /// If this is a pointer, ObjC object pointer, or block |
2333 | /// pointer, this returns the respective pointee. |
2334 | QualType getPointeeType() const; |
2335 | |
2336 | /// Return the specified type with any "sugar" removed from the type, |
2337 | /// removing any typedefs, typeofs, etc., as well as any qualifiers. |
2338 | const Type *getUnqualifiedDesugaredType() const; |
2339 | |
2340 | /// More type predicates useful for type checking/promotion |
2341 | bool isPromotableIntegerType() const; // C99 6.3.1.1p2 |
2342 | |
2343 | /// Return true if this is an integer type that is |
2344 | /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], |
2345 | /// or an enum decl which has a signed representation. |
2346 | bool isSignedIntegerType() const; |
2347 | |
2348 | /// Return true if this is an integer type that is |
2349 | /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], |
2350 | /// or an enum decl which has an unsigned representation. |
2351 | bool isUnsignedIntegerType() const; |
2352 | |
2353 | /// Determines whether this is an integer type that is signed or an |
2354 | /// enumeration types whose underlying type is a signed integer type. |
2355 | bool isSignedIntegerOrEnumerationType() const; |
2356 | |
2357 | /// Determines whether this is an integer type that is unsigned or an |
2358 | /// enumeration types whose underlying type is a unsigned integer type. |
2359 | bool isUnsignedIntegerOrEnumerationType() const; |
2360 | |
2361 | /// Return true if this is a fixed point type according to |
2362 | /// ISO/IEC JTC1 SC22 WG14 N1169. |
2363 | bool isFixedPointType() const; |
2364 | |
2365 | /// Return true if this is a fixed point or integer type. |
2366 | bool isFixedPointOrIntegerType() const; |
2367 | |
2368 | /// Return true if this is a saturated fixed point type according to |
2369 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2370 | bool isSaturatedFixedPointType() const; |
2371 | |
2372 | /// Return true if this is a saturated fixed point type according to |
2373 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2374 | bool isUnsaturatedFixedPointType() const; |
2375 | |
2376 | /// Return true if this is a fixed point type that is signed according |
2377 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2378 | bool isSignedFixedPointType() const; |
2379 | |
2380 | /// Return true if this is a fixed point type that is unsigned according |
2381 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2382 | bool isUnsignedFixedPointType() const; |
2383 | |
2384 | /// Return true if this is not a variable sized type, |
2385 | /// according to the rules of C99 6.7.5p3. It is not legal to call this on |
2386 | /// incomplete types. |
2387 | bool isConstantSizeType() const; |
2388 | |
2389 | /// Returns true if this type can be represented by some |
2390 | /// set of type specifiers. |
2391 | bool isSpecifierType() const; |
2392 | |
2393 | /// Determine the linkage of this type. |
2394 | Linkage getLinkage() const; |
2395 | |
2396 | /// Determine the visibility of this type. |
2397 | Visibility getVisibility() const { |
2398 | return getLinkageAndVisibility().getVisibility(); |
2399 | } |
2400 | |
2401 | /// Return true if the visibility was explicitly set is the code. |
2402 | bool isVisibilityExplicit() const { |
2403 | return getLinkageAndVisibility().isVisibilityExplicit(); |
2404 | } |
2405 | |
2406 | /// Determine the linkage and visibility of this type. |
2407 | LinkageInfo getLinkageAndVisibility() const; |
2408 | |
2409 | /// True if the computed linkage is valid. Used for consistency |
2410 | /// checking. Should always return true. |
2411 | bool isLinkageValid() const; |
2412 | |
2413 | /// Determine the nullability of the given type. |
2414 | /// |
2415 | /// Note that nullability is only captured as sugar within the type |
2416 | /// system, not as part of the canonical type, so nullability will |
2417 | /// be lost by canonicalization and desugaring. |
2418 | Optional<NullabilityKind> getNullability(const ASTContext &context) const; |
2419 | |
2420 | /// Determine whether the given type can have a nullability |
2421 | /// specifier applied to it, i.e., if it is any kind of pointer type. |
2422 | /// |
2423 | /// \param ResultIfUnknown The value to return if we don't yet know whether |
2424 | /// this type can have nullability because it is dependent. |
2425 | bool canHaveNullability(bool ResultIfUnknown = true) const; |
2426 | |
2427 | /// Retrieve the set of substitutions required when accessing a member |
2428 | /// of the Objective-C receiver type that is declared in the given context. |
2429 | /// |
2430 | /// \c *this is the type of the object we're operating on, e.g., the |
2431 | /// receiver for a message send or the base of a property access, and is |
2432 | /// expected to be of some object or object pointer type. |
2433 | /// |
2434 | /// \param dc The declaration context for which we are building up a |
2435 | /// substitution mapping, which should be an Objective-C class, extension, |
2436 | /// category, or method within. |
2437 | /// |
2438 | /// \returns an array of type arguments that can be substituted for |
2439 | /// the type parameters of the given declaration context in any type described |
2440 | /// within that context, or an empty optional to indicate that no |
2441 | /// substitution is required. |
2442 | Optional<ArrayRef<QualType>> |
2443 | getObjCSubstitutions(const DeclContext *dc) const; |
2444 | |
2445 | /// Determines if this is an ObjC interface type that may accept type |
2446 | /// parameters. |
2447 | bool acceptsObjCTypeParams() const; |
2448 | |
2449 | const char *getTypeClassName() const; |
2450 | |
2451 | QualType getCanonicalTypeInternal() const { |
2452 | return CanonicalType; |
2453 | } |
2454 | |
2455 | CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h |
2456 | void dump() const; |
2457 | void dump(llvm::raw_ostream &OS, const ASTContext &Context) const; |
2458 | }; |
2459 | |
2460 | /// This will check for a TypedefType by removing any existing sugar |
2461 | /// until it reaches a TypedefType or a non-sugared type. |
2462 | template <> const TypedefType *Type::getAs() const; |
2463 | |
2464 | /// This will check for a TemplateSpecializationType by removing any |
2465 | /// existing sugar until it reaches a TemplateSpecializationType or a |
2466 | /// non-sugared type. |
2467 | template <> const TemplateSpecializationType *Type::getAs() const; |
2468 | |
2469 | /// This will check for an AttributedType by removing any existing sugar |
2470 | /// until it reaches an AttributedType or a non-sugared type. |
2471 | template <> const AttributedType *Type::getAs() const; |
2472 | |
2473 | // We can do canonical leaf types faster, because we don't have to |
2474 | // worry about preserving child type decoration. |
2475 | #define TYPE(Class, Base) |
2476 | #define LEAF_TYPE(Class) \ |
2477 | template <> inline const Class##Type *Type::getAs() const { \ |
2478 | return dyn_cast<Class##Type>(CanonicalType); \ |
2479 | } \ |
2480 | template <> inline const Class##Type *Type::castAs() const { \ |
2481 | return cast<Class##Type>(CanonicalType); \ |
2482 | } |
2483 | #include "clang/AST/TypeNodes.inc" |
2484 | |
2485 | /// This class is used for builtin types like 'int'. Builtin |
2486 | /// types are always canonical and have a literal name field. |
2487 | class BuiltinType : public Type { |
2488 | public: |
2489 | enum Kind { |
2490 | // OpenCL image types |
2491 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id, |
2492 | #include "clang/Basic/OpenCLImageTypes.def" |
2493 | // OpenCL extension types |
2494 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id, |
2495 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2496 | // SVE Types |
2497 | #define SVE_TYPE(Name, Id, SingletonId) Id, |
2498 | #include "clang/Basic/AArch64SVEACLETypes.def" |
2499 | // PPC MMA Types |
2500 | #define PPC_VECTOR_TYPE(Name, Id, Size) Id, |
2501 | #include "clang/Basic/PPCTypes.def" |
2502 | // RVV Types |
2503 | #define RVV_TYPE(Name, Id, SingletonId) Id, |
2504 | #include "clang/Basic/RISCVVTypes.def" |
2505 | // All other builtin types |
2506 | #define BUILTIN_TYPE(Id, SingletonId) Id, |
2507 | #define LAST_BUILTIN_TYPE(Id) LastKind = Id |
2508 | #include "clang/AST/BuiltinTypes.def" |
2509 | }; |
2510 | |
2511 | private: |
2512 | friend class ASTContext; // ASTContext creates these. |
2513 | |
2514 | BuiltinType(Kind K) |
2515 | : Type(Builtin, QualType(), |
2516 | K == Dependent ? TypeDependence::DependentInstantiation |
2517 | : TypeDependence::None) { |
2518 | BuiltinTypeBits.Kind = K; |
2519 | } |
2520 | |
2521 | public: |
2522 | Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } |
2523 | StringRef getName(const PrintingPolicy &Policy) const; |
2524 | |
2525 | const char *getNameAsCString(const PrintingPolicy &Policy) const { |
2526 | // The StringRef is null-terminated. |
2527 | StringRef str = getName(Policy); |
2528 | assert(!str.empty() && str.data()[str.size()] == '\0')(static_cast <bool> (!str.empty() && str.data() [str.size()] == '\0') ? void (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 2528, __extension__ __PRETTY_FUNCTION__)); |
2529 | return str.data(); |
2530 | } |
2531 | |
2532 | bool isSugared() const { return false; } |
2533 | QualType desugar() const { return QualType(this, 0); } |
2534 | |
2535 | bool isInteger() const { |
2536 | return getKind() >= Bool && getKind() <= Int128; |
2537 | } |
2538 | |
2539 | bool isSignedInteger() const { |
2540 | return getKind() >= Char_S && getKind() <= Int128; |
2541 | } |
2542 | |
2543 | bool isUnsignedInteger() const { |
2544 | return getKind() >= Bool && getKind() <= UInt128; |
2545 | } |
2546 | |
2547 | bool isFloatingPoint() const { |
2548 | return getKind() >= Half && getKind() <= Float128; |
2549 | } |
2550 | |
2551 | /// Determines whether the given kind corresponds to a placeholder type. |
2552 | static bool isPlaceholderTypeKind(Kind K) { |
2553 | return K >= Overload; |
2554 | } |
2555 | |
2556 | /// Determines whether this type is a placeholder type, i.e. a type |
2557 | /// which cannot appear in arbitrary positions in a fully-formed |
2558 | /// expression. |
2559 | bool isPlaceholderType() const { |
2560 | return isPlaceholderTypeKind(getKind()); |
2561 | } |
2562 | |
2563 | /// Determines whether this type is a placeholder type other than |
2564 | /// Overload. Most placeholder types require only syntactic |
2565 | /// information about their context in order to be resolved (e.g. |
2566 | /// whether it is a call expression), which means they can (and |
2567 | /// should) be resolved in an earlier "phase" of analysis. |
2568 | /// Overload expressions sometimes pick up further information |
2569 | /// from their context, like whether the context expects a |
2570 | /// specific function-pointer type, and so frequently need |
2571 | /// special treatment. |
2572 | bool isNonOverloadPlaceholderType() const { |
2573 | return getKind() > Overload; |
2574 | } |
2575 | |
2576 | static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } |
2577 | }; |
2578 | |
2579 | /// Complex values, per C99 6.2.5p11. This supports the C99 complex |
2580 | /// types (_Complex float etc) as well as the GCC integer complex extensions. |
2581 | class ComplexType : public Type, public llvm::FoldingSetNode { |
2582 | friend class ASTContext; // ASTContext creates these. |
2583 | |
2584 | QualType ElementType; |
2585 | |
2586 | ComplexType(QualType Element, QualType CanonicalPtr) |
2587 | : Type(Complex, CanonicalPtr, Element->getDependence()), |
2588 | ElementType(Element) {} |
2589 | |
2590 | public: |
2591 | QualType getElementType() const { return ElementType; } |
2592 | |
2593 | bool isSugared() const { return false; } |
2594 | QualType desugar() const { return QualType(this, 0); } |
2595 | |
2596 | void Profile(llvm::FoldingSetNodeID &ID) { |
2597 | Profile(ID, getElementType()); |
2598 | } |
2599 | |
2600 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { |
2601 | ID.AddPointer(Element.getAsOpaquePtr()); |
2602 | } |
2603 | |
2604 | static bool classof(const Type *T) { return T->getTypeClass() == Complex; } |
2605 | }; |
2606 | |
2607 | /// Sugar for parentheses used when specifying types. |
2608 | class ParenType : public Type, public llvm::FoldingSetNode { |
2609 | friend class ASTContext; // ASTContext creates these. |
2610 | |
2611 | QualType Inner; |
2612 | |
2613 | ParenType(QualType InnerType, QualType CanonType) |
2614 | : Type(Paren, CanonType, InnerType->getDependence()), Inner(InnerType) {} |
2615 | |
2616 | public: |
2617 | QualType getInnerType() const { return Inner; } |
2618 | |
2619 | bool isSugared() const { return true; } |
2620 | QualType desugar() const { return getInnerType(); } |
2621 | |
2622 | void Profile(llvm::FoldingSetNodeID &ID) { |
2623 | Profile(ID, getInnerType()); |
2624 | } |
2625 | |
2626 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { |
2627 | Inner.Profile(ID); |
2628 | } |
2629 | |
2630 | static bool classof(const Type *T) { return T->getTypeClass() == Paren; } |
2631 | }; |
2632 | |
2633 | /// PointerType - C99 6.7.5.1 - Pointer Declarators. |
2634 | class PointerType : public Type, public llvm::FoldingSetNode { |
2635 | friend class ASTContext; // ASTContext creates these. |
2636 | |
2637 | QualType PointeeType; |
2638 | |
2639 | PointerType(QualType Pointee, QualType CanonicalPtr) |
2640 | : Type(Pointer, CanonicalPtr, Pointee->getDependence()), |
2641 | PointeeType(Pointee) {} |
2642 | |
2643 | public: |
2644 | QualType getPointeeType() const { return PointeeType; } |
2645 | |
2646 | bool isSugared() const { return false; } |
2647 | QualType desugar() const { return QualType(this, 0); } |
2648 | |
2649 | void Profile(llvm::FoldingSetNodeID &ID) { |
2650 | Profile(ID, getPointeeType()); |
2651 | } |
2652 | |
2653 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2654 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2655 | } |
2656 | |
2657 | static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } |
2658 | }; |
2659 | |
2660 | /// Represents a type which was implicitly adjusted by the semantic |
2661 | /// engine for arbitrary reasons. For example, array and function types can |
2662 | /// decay, and function types can have their calling conventions adjusted. |
2663 | class AdjustedType : public Type, public llvm::FoldingSetNode { |
2664 | QualType OriginalTy; |
2665 | QualType AdjustedTy; |
2666 | |
2667 | protected: |
2668 | friend class ASTContext; // ASTContext creates these. |
2669 | |
2670 | AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, |
2671 | QualType CanonicalPtr) |
2672 | : Type(TC, CanonicalPtr, OriginalTy->getDependence()), |
2673 | OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {} |
2674 | |
2675 | public: |
2676 | QualType getOriginalType() const { return OriginalTy; } |
2677 | QualType getAdjustedType() const { return AdjustedTy; } |
2678 | |
2679 | bool isSugared() const { return true; } |
2680 | QualType desugar() const { return AdjustedTy; } |
2681 | |
2682 | void Profile(llvm::FoldingSetNodeID &ID) { |
2683 | Profile(ID, OriginalTy, AdjustedTy); |
2684 | } |
2685 | |
2686 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) { |
2687 | ID.AddPointer(Orig.getAsOpaquePtr()); |
2688 | ID.AddPointer(New.getAsOpaquePtr()); |
2689 | } |
2690 | |
2691 | static bool classof(const Type *T) { |
2692 | return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed; |
2693 | } |
2694 | }; |
2695 | |
2696 | /// Represents a pointer type decayed from an array or function type. |
2697 | class DecayedType : public AdjustedType { |
2698 | friend class ASTContext; // ASTContext creates these. |
2699 | |
2700 | inline |
2701 | DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical); |
2702 | |
2703 | public: |
2704 | QualType getDecayedType() const { return getAdjustedType(); } |
2705 | |
2706 | inline QualType getPointeeType() const; |
2707 | |
2708 | static bool classof(const Type *T) { return T->getTypeClass() == Decayed; } |
2709 | }; |
2710 | |
2711 | /// Pointer to a block type. |
2712 | /// This type is to represent types syntactically represented as |
2713 | /// "void (^)(int)", etc. Pointee is required to always be a function type. |
2714 | class BlockPointerType : public Type, public llvm::FoldingSetNode { |
2715 | friend class ASTContext; // ASTContext creates these. |
2716 | |
2717 | // Block is some kind of pointer type |
2718 | QualType PointeeType; |
2719 | |
2720 | BlockPointerType(QualType Pointee, QualType CanonicalCls) |
2721 | : Type(BlockPointer, CanonicalCls, Pointee->getDependence()), |
2722 | PointeeType(Pointee) {} |
2723 | |
2724 | public: |
2725 | // Get the pointee type. Pointee is required to always be a function type. |
2726 | QualType getPointeeType() const { return PointeeType; } |
2727 | |
2728 | bool isSugared() const { return false; } |
2729 | QualType desugar() const { return QualType(this, 0); } |
2730 | |
2731 | void Profile(llvm::FoldingSetNodeID &ID) { |
2732 | Profile(ID, getPointeeType()); |
2733 | } |
2734 | |
2735 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2736 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2737 | } |
2738 | |
2739 | static bool classof(const Type *T) { |
2740 | return T->getTypeClass() == BlockPointer; |
2741 | } |
2742 | }; |
2743 | |
2744 | /// Base for LValueReferenceType and RValueReferenceType |
2745 | class ReferenceType : public Type, public llvm::FoldingSetNode { |
2746 | QualType PointeeType; |
2747 | |
2748 | protected: |
2749 | ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, |
2750 | bool SpelledAsLValue) |
2751 | : Type(tc, CanonicalRef, Referencee->getDependence()), |
2752 | PointeeType(Referencee) { |
2753 | ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; |
2754 | ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); |
2755 | } |
2756 | |
2757 | public: |
2758 | bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } |
2759 | bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } |
2760 | |
2761 | QualType getPointeeTypeAsWritten() const { return PointeeType; } |
2762 | |
2763 | QualType getPointeeType() const { |
2764 | // FIXME: this might strip inner qualifiers; okay? |
2765 | const ReferenceType *T = this; |
2766 | while (T->isInnerRef()) |
2767 | T = T->PointeeType->castAs<ReferenceType>(); |
2768 | return T->PointeeType; |
2769 | } |
2770 | |
2771 | void Profile(llvm::FoldingSetNodeID &ID) { |
2772 | Profile(ID, PointeeType, isSpelledAsLValue()); |
2773 | } |
2774 | |
2775 | static void Profile(llvm::FoldingSetNodeID &ID, |
2776 | QualType Referencee, |
2777 | bool SpelledAsLValue) { |
2778 | ID.AddPointer(Referencee.getAsOpaquePtr()); |
2779 | ID.AddBoolean(SpelledAsLValue); |
2780 | } |
2781 | |
2782 | static bool classof(const Type *T) { |
2783 | return T->getTypeClass() == LValueReference || |
2784 | T->getTypeClass() == RValueReference; |
2785 | } |
2786 | }; |
2787 | |
2788 | /// An lvalue reference type, per C++11 [dcl.ref]. |
2789 | class LValueReferenceType : public ReferenceType { |
2790 | friend class ASTContext; // ASTContext creates these |
2791 | |
2792 | LValueReferenceType(QualType Referencee, QualType CanonicalRef, |
2793 | bool SpelledAsLValue) |
2794 | : ReferenceType(LValueReference, Referencee, CanonicalRef, |
2795 | SpelledAsLValue) {} |
2796 | |
2797 | public: |
2798 | bool isSugared() const { return false; } |
2799 | QualType desugar() const { return QualType(this, 0); } |
2800 | |
2801 | static bool classof(const Type *T) { |
2802 | return T->getTypeClass() == LValueReference; |
2803 | } |
2804 | }; |
2805 | |
2806 | /// An rvalue reference type, per C++11 [dcl.ref]. |
2807 | class RValueReferenceType : public ReferenceType { |
2808 | friend class ASTContext; // ASTContext creates these |
2809 | |
2810 | RValueReferenceType(QualType Referencee, QualType CanonicalRef) |
2811 | : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {} |
2812 | |
2813 | public: |
2814 | bool isSugared() const { return false; } |
2815 | QualType desugar() const { return QualType(this, 0); } |
2816 | |
2817 | static bool classof(const Type *T) { |
2818 | return T->getTypeClass() == RValueReference; |
2819 | } |
2820 | }; |
2821 | |
2822 | /// A pointer to member type per C++ 8.3.3 - Pointers to members. |
2823 | /// |
2824 | /// This includes both pointers to data members and pointer to member functions. |
2825 | class MemberPointerType : public Type, public llvm::FoldingSetNode { |
2826 | friend class ASTContext; // ASTContext creates these. |
2827 | |
2828 | QualType PointeeType; |
2829 | |
2830 | /// The class of which the pointee is a member. Must ultimately be a |
2831 | /// RecordType, but could be a typedef or a template parameter too. |
2832 | const Type *Class; |
2833 | |
2834 | MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) |
2835 | : Type(MemberPointer, CanonicalPtr, |
2836 | (Cls->getDependence() & ~TypeDependence::VariablyModified) | |
2837 | Pointee->getDependence()), |
2838 | PointeeType(Pointee), Class(Cls) {} |
2839 | |
2840 | public: |
2841 | QualType getPointeeType() const { return PointeeType; } |
2842 | |
2843 | /// Returns true if the member type (i.e. the pointee type) is a |
2844 | /// function type rather than a data-member type. |
2845 | bool isMemberFunctionPointer() const { |
2846 | return PointeeType->isFunctionProtoType(); |
2847 | } |
2848 | |
2849 | /// Returns true if the member type (i.e. the pointee type) is a |
2850 | /// data type rather than a function type. |
2851 | bool isMemberDataPointer() const { |
2852 | return !PointeeType->isFunctionProtoType(); |
2853 | } |
2854 | |
2855 | const Type *getClass() const { return Class; } |
2856 | CXXRecordDecl *getMostRecentCXXRecordDecl() const; |
2857 | |
2858 | bool isSugared() const { return false; } |
2859 | QualType desugar() const { return QualType(this, 0); } |
2860 | |
2861 | void Profile(llvm::FoldingSetNodeID &ID) { |
2862 | Profile(ID, getPointeeType(), getClass()); |
2863 | } |
2864 | |
2865 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, |
2866 | const Type *Class) { |
2867 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2868 | ID.AddPointer(Class); |
2869 | } |
2870 | |
2871 | static bool classof(const Type *T) { |
2872 | return T->getTypeClass() == MemberPointer; |
2873 | } |
2874 | }; |
2875 | |
2876 | /// Represents an array type, per C99 6.7.5.2 - Array Declarators. |
2877 | class ArrayType : public Type, public llvm::FoldingSetNode { |
2878 | public: |
2879 | /// Capture whether this is a normal array (e.g. int X[4]) |
2880 | /// an array with a static size (e.g. int X[static 4]), or an array |
2881 | /// with a star size (e.g. int X[*]). |
2882 | /// 'static' is only allowed on function parameters. |
2883 | enum ArraySizeModifier { |
2884 | Normal, Static, Star |
2885 | }; |
2886 | |
2887 | private: |
2888 | /// The element type of the array. |
2889 | QualType ElementType; |
2890 | |
2891 | protected: |
2892 | friend class ASTContext; // ASTContext creates these. |
2893 | |
2894 | ArrayType(TypeClass tc, QualType et, QualType can, ArraySizeModifier sm, |
2895 | unsigned tq, const Expr *sz = nullptr); |
2896 | |
2897 | public: |
2898 | QualType getElementType() const { return ElementType; } |
2899 | |
2900 | ArraySizeModifier getSizeModifier() const { |
2901 | return ArraySizeModifier(ArrayTypeBits.SizeModifier); |
2902 | } |
2903 | |
2904 | Qualifiers getIndexTypeQualifiers() const { |
2905 | return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); |
2906 | } |
2907 | |
2908 | unsigned getIndexTypeCVRQualifiers() const { |
2909 | return ArrayTypeBits.IndexTypeQuals; |
2910 | } |
2911 | |
2912 | static bool classof(const Type *T) { |
2913 | return T->getTypeClass() == ConstantArray || |
2914 | T->getTypeClass() == VariableArray || |
2915 | T->getTypeClass() == IncompleteArray || |
2916 | T->getTypeClass() == DependentSizedArray; |
2917 | } |
2918 | }; |
2919 | |
2920 | /// Represents the canonical version of C arrays with a specified constant size. |
2921 | /// For example, the canonical type for 'int A[4 + 4*100]' is a |
2922 | /// ConstantArrayType where the element type is 'int' and the size is 404. |
2923 | class ConstantArrayType final |
2924 | : public ArrayType, |
2925 | private llvm::TrailingObjects<ConstantArrayType, const Expr *> { |
2926 | friend class ASTContext; // ASTContext creates these. |
2927 | friend TrailingObjects; |
2928 | |
2929 | llvm::APInt Size; // Allows us to unique the type. |
2930 | |
2931 | ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, |
2932 | const Expr *sz, ArraySizeModifier sm, unsigned tq) |
2933 | : ArrayType(ConstantArray, et, can, sm, tq, sz), Size(size) { |
2934 | ConstantArrayTypeBits.HasStoredSizeExpr = sz != nullptr; |
2935 | if (ConstantArrayTypeBits.HasStoredSizeExpr) { |
2936 | assert(!can.isNull() && "canonical constant array should not have size")(static_cast <bool> (!can.isNull() && "canonical constant array should not have size" ) ? void (0) : __assert_fail ("!can.isNull() && \"canonical constant array should not have size\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 2936, __extension__ __PRETTY_FUNCTION__)); |
2937 | *getTrailingObjects<const Expr*>() = sz; |
2938 | } |
2939 | } |
2940 | |
2941 | unsigned numTrailingObjects(OverloadToken<const Expr*>) const { |
2942 | return ConstantArrayTypeBits.HasStoredSizeExpr; |
2943 | } |
2944 | |
2945 | public: |
2946 | const llvm::APInt &getSize() const { return Size; } |
2947 | const Expr *getSizeExpr() const { |
2948 | return ConstantArrayTypeBits.HasStoredSizeExpr |
2949 | ? *getTrailingObjects<const Expr *>() |
2950 | : nullptr; |
2951 | } |
2952 | bool isSugared() const { return false; } |
2953 | QualType desugar() const { return QualType(this, 0); } |
2954 | |
2955 | /// Determine the number of bits required to address a member of |
2956 | // an array with the given element type and number of elements. |
2957 | static unsigned getNumAddressingBits(const ASTContext &Context, |
2958 | QualType ElementType, |
2959 | const llvm::APInt &NumElements); |
2960 | |
2961 | /// Determine the maximum number of active bits that an array's size |
2962 | /// can require, which limits the maximum size of the array. |
2963 | static unsigned getMaxSizeBits(const ASTContext &Context); |
2964 | |
2965 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
2966 | Profile(ID, Ctx, getElementType(), getSize(), getSizeExpr(), |
2967 | getSizeModifier(), getIndexTypeCVRQualifiers()); |
2968 | } |
2969 | |
2970 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx, |
2971 | QualType ET, const llvm::APInt &ArraySize, |
2972 | const Expr *SizeExpr, ArraySizeModifier SizeMod, |
2973 | unsigned TypeQuals); |
2974 | |
2975 | static bool classof(const Type *T) { |
2976 | return T->getTypeClass() == ConstantArray; |
2977 | } |
2978 | }; |
2979 | |
2980 | /// Represents a C array with an unspecified size. For example 'int A[]' has |
2981 | /// an IncompleteArrayType where the element type is 'int' and the size is |
2982 | /// unspecified. |
2983 | class IncompleteArrayType : public ArrayType { |
2984 | friend class ASTContext; // ASTContext creates these. |
2985 | |
2986 | IncompleteArrayType(QualType et, QualType can, |
2987 | ArraySizeModifier sm, unsigned tq) |
2988 | : ArrayType(IncompleteArray, et, can, sm, tq) {} |
2989 | |
2990 | public: |
2991 | friend class StmtIteratorBase; |
2992 | |
2993 | bool isSugared() const { return false; } |
2994 | QualType desugar() const { return QualType(this, 0); } |
2995 | |
2996 | static bool classof(const Type *T) { |
2997 | return T->getTypeClass() == IncompleteArray; |
2998 | } |
2999 | |
3000 | void Profile(llvm::FoldingSetNodeID &ID) { |
3001 | Profile(ID, getElementType(), getSizeModifier(), |
3002 | getIndexTypeCVRQualifiers()); |
3003 | } |
3004 | |
3005 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, |
3006 | ArraySizeModifier SizeMod, unsigned TypeQuals) { |
3007 | ID.AddPointer(ET.getAsOpaquePtr()); |
3008 | ID.AddInteger(SizeMod); |
3009 | ID.AddInteger(TypeQuals); |
3010 | } |
3011 | }; |
3012 | |
3013 | /// Represents a C array with a specified size that is not an |
3014 | /// integer-constant-expression. For example, 'int s[x+foo()]'. |
3015 | /// Since the size expression is an arbitrary expression, we store it as such. |
3016 | /// |
3017 | /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and |
3018 | /// should not be: two lexically equivalent variable array types could mean |
3019 | /// different things, for example, these variables do not have the same type |
3020 | /// dynamically: |
3021 | /// |
3022 | /// void foo(int x) { |
3023 | /// int Y[x]; |
3024 | /// ++x; |
3025 | /// int Z[x]; |
3026 | /// } |
3027 | class VariableArrayType : public ArrayType { |
3028 | friend class ASTContext; // ASTContext creates these. |
3029 | |
3030 | /// An assignment-expression. VLA's are only permitted within |
3031 | /// a function block. |
3032 | Stmt *SizeExpr; |
3033 | |
3034 | /// The range spanned by the left and right array brackets. |
3035 | SourceRange Brackets; |
3036 | |
3037 | VariableArrayType(QualType et, QualType can, Expr *e, |
3038 | ArraySizeModifier sm, unsigned tq, |
3039 | SourceRange brackets) |
3040 | : ArrayType(VariableArray, et, can, sm, tq, e), |
3041 | SizeExpr((Stmt*) e), Brackets(brackets) {} |
3042 | |
3043 | public: |
3044 | friend class StmtIteratorBase; |
3045 | |
3046 | Expr *getSizeExpr() const { |
3047 | // We use C-style casts instead of cast<> here because we do not wish |
3048 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3049 | return (Expr*) SizeExpr; |
3050 | } |
3051 | |
3052 | SourceRange getBracketsRange() const { return Brackets; } |
3053 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3054 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3055 | |
3056 | bool isSugared() const { return false; } |
3057 | QualType desugar() const { return QualType(this, 0); } |
3058 | |
3059 | static bool classof(const Type *T) { |
3060 | return T->getTypeClass() == VariableArray; |
3061 | } |
3062 | |
3063 | void Profile(llvm::FoldingSetNodeID &ID) { |
3064 | llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes." , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 3064); |
3065 | } |
3066 | }; |
3067 | |
3068 | /// Represents an array type in C++ whose size is a value-dependent expression. |
3069 | /// |
3070 | /// For example: |
3071 | /// \code |
3072 | /// template<typename T, int Size> |
3073 | /// class array { |
3074 | /// T data[Size]; |
3075 | /// }; |
3076 | /// \endcode |
3077 | /// |
3078 | /// For these types, we won't actually know what the array bound is |
3079 | /// until template instantiation occurs, at which point this will |
3080 | /// become either a ConstantArrayType or a VariableArrayType. |
3081 | class DependentSizedArrayType : public ArrayType { |
3082 | friend class ASTContext; // ASTContext creates these. |
3083 | |
3084 | const ASTContext &Context; |
3085 | |
3086 | /// An assignment expression that will instantiate to the |
3087 | /// size of the array. |
3088 | /// |
3089 | /// The expression itself might be null, in which case the array |
3090 | /// type will have its size deduced from an initializer. |
3091 | Stmt *SizeExpr; |
3092 | |
3093 | /// The range spanned by the left and right array brackets. |
3094 | SourceRange Brackets; |
3095 | |
3096 | DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, |
3097 | Expr *e, ArraySizeModifier sm, unsigned tq, |
3098 | SourceRange brackets); |
3099 | |
3100 | public: |
3101 | friend class StmtIteratorBase; |
3102 | |
3103 | Expr *getSizeExpr() const { |
3104 | // We use C-style casts instead of cast<> here because we do not wish |
3105 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3106 | return (Expr*) SizeExpr; |
3107 | } |
3108 | |
3109 | SourceRange getBracketsRange() const { return Brackets; } |
3110 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3111 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3112 | |
3113 | bool isSugared() const { return false; } |
3114 | QualType desugar() const { return QualType(this, 0); } |
3115 | |
3116 | static bool classof(const Type *T) { |
3117 | return T->getTypeClass() == DependentSizedArray; |
3118 | } |
3119 | |
3120 | void Profile(llvm::FoldingSetNodeID &ID) { |
3121 | Profile(ID, Context, getElementType(), |
3122 | getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); |
3123 | } |
3124 | |
3125 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3126 | QualType ET, ArraySizeModifier SizeMod, |
3127 | unsigned TypeQuals, Expr *E); |
3128 | }; |
3129 | |
3130 | /// Represents an extended address space qualifier where the input address space |
3131 | /// value is dependent. Non-dependent address spaces are not represented with a |
3132 | /// special Type subclass; they are stored on an ExtQuals node as part of a QualType. |
3133 | /// |
3134 | /// For example: |
3135 | /// \code |
3136 | /// template<typename T, int AddrSpace> |
3137 | /// class AddressSpace { |
3138 | /// typedef T __attribute__((address_space(AddrSpace))) type; |
3139 | /// } |
3140 | /// \endcode |
3141 | class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode { |
3142 | friend class ASTContext; |
3143 | |
3144 | const ASTContext &Context; |
3145 | Expr *AddrSpaceExpr; |
3146 | QualType PointeeType; |
3147 | SourceLocation loc; |
3148 | |
3149 | DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType, |
3150 | QualType can, Expr *AddrSpaceExpr, |
3151 | SourceLocation loc); |
3152 | |
3153 | public: |
3154 | Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; } |
3155 | QualType getPointeeType() const { return PointeeType; } |
3156 | SourceLocation getAttributeLoc() const { return loc; } |
3157 | |
3158 | bool isSugared() const { return false; } |
3159 | QualType desugar() const { return QualType(this, 0); } |
3160 | |
3161 | static bool classof(const Type *T) { |
3162 | return T->getTypeClass() == DependentAddressSpace; |
3163 | } |
3164 | |
3165 | void Profile(llvm::FoldingSetNodeID &ID) { |
3166 | Profile(ID, Context, getPointeeType(), getAddrSpaceExpr()); |
3167 | } |
3168 | |
3169 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3170 | QualType PointeeType, Expr *AddrSpaceExpr); |
3171 | }; |
3172 | |
3173 | /// Represents an extended vector type where either the type or size is |
3174 | /// dependent. |
3175 | /// |
3176 | /// For example: |
3177 | /// \code |
3178 | /// template<typename T, int Size> |
3179 | /// class vector { |
3180 | /// typedef T __attribute__((ext_vector_type(Size))) type; |
3181 | /// } |
3182 | /// \endcode |
3183 | class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { |
3184 | friend class ASTContext; |
3185 | |
3186 | const ASTContext &Context; |
3187 | Expr *SizeExpr; |
3188 | |
3189 | /// The element type of the array. |
3190 | QualType ElementType; |
3191 | |
3192 | SourceLocation loc; |
3193 | |
3194 | DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, |
3195 | QualType can, Expr *SizeExpr, SourceLocation loc); |
3196 | |
3197 | public: |
3198 | Expr *getSizeExpr() const { return SizeExpr; } |
3199 | QualType getElementType() const { return ElementType; } |
3200 | SourceLocation getAttributeLoc() const { return loc; } |
3201 | |
3202 | bool isSugared() const { return false; } |
3203 | QualType desugar() const { return QualType(this, 0); } |
3204 | |
3205 | static bool classof(const Type *T) { |
3206 | return T->getTypeClass() == DependentSizedExtVector; |
3207 | } |
3208 | |
3209 | void Profile(llvm::FoldingSetNodeID &ID) { |
3210 | Profile(ID, Context, getElementType(), getSizeExpr()); |
3211 | } |
3212 | |
3213 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3214 | QualType ElementType, Expr *SizeExpr); |
3215 | }; |
3216 | |
3217 | |
3218 | /// Represents a GCC generic vector type. This type is created using |
3219 | /// __attribute__((vector_size(n)), where "n" specifies the vector size in |
3220 | /// bytes; or from an Altivec __vector or vector declaration. |
3221 | /// Since the constructor takes the number of vector elements, the |
3222 | /// client is responsible for converting the size into the number of elements. |
3223 | class VectorType : public Type, public llvm::FoldingSetNode { |
3224 | public: |
3225 | enum VectorKind { |
3226 | /// not a target-specific vector type |
3227 | GenericVector, |
3228 | |
3229 | /// is AltiVec vector |
3230 | AltiVecVector, |
3231 | |
3232 | /// is AltiVec 'vector Pixel' |
3233 | AltiVecPixel, |
3234 | |
3235 | /// is AltiVec 'vector bool ...' |
3236 | AltiVecBool, |
3237 | |
3238 | /// is ARM Neon vector |
3239 | NeonVector, |
3240 | |
3241 | /// is ARM Neon polynomial vector |
3242 | NeonPolyVector, |
3243 | |
3244 | /// is AArch64 SVE fixed-length data vector |
3245 | SveFixedLengthDataVector, |
3246 | |
3247 | /// is AArch64 SVE fixed-length predicate vector |
3248 | SveFixedLengthPredicateVector |
3249 | }; |
3250 | |
3251 | protected: |
3252 | friend class ASTContext; // ASTContext creates these. |
3253 | |
3254 | /// The element type of the vector. |
3255 | QualType ElementType; |
3256 | |
3257 | VectorType(QualType vecType, unsigned nElements, QualType canonType, |
3258 | VectorKind vecKind); |
3259 | |
3260 | VectorType(TypeClass tc, QualType vecType, unsigned nElements, |
3261 | QualType canonType, VectorKind vecKind); |
3262 | |
3263 | public: |
3264 | QualType getElementType() const { return ElementType; } |
3265 | unsigned getNumElements() const { return VectorTypeBits.NumElements; } |
3266 | |
3267 | bool isSugared() const { return false; } |
3268 | QualType desugar() const { return QualType(this, 0); } |
3269 | |
3270 | VectorKind getVectorKind() const { |
3271 | return VectorKind(VectorTypeBits.VecKind); |
3272 | } |
3273 | |
3274 | void Profile(llvm::FoldingSetNodeID &ID) { |
3275 | Profile(ID, getElementType(), getNumElements(), |
3276 | getTypeClass(), getVectorKind()); |
3277 | } |
3278 | |
3279 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3280 | unsigned NumElements, TypeClass TypeClass, |
3281 | VectorKind VecKind) { |
3282 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3283 | ID.AddInteger(NumElements); |
3284 | ID.AddInteger(TypeClass); |
3285 | ID.AddInteger(VecKind); |
3286 | } |
3287 | |
3288 | static bool classof(const Type *T) { |
3289 | return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; |
3290 | } |
3291 | }; |
3292 | |
3293 | /// Represents a vector type where either the type or size is dependent. |
3294 | //// |
3295 | /// For example: |
3296 | /// \code |
3297 | /// template<typename T, int Size> |
3298 | /// class vector { |
3299 | /// typedef T __attribute__((vector_size(Size))) type; |
3300 | /// } |
3301 | /// \endcode |
3302 | class DependentVectorType : public Type, public llvm::FoldingSetNode { |
3303 | friend class ASTContext; |
3304 | |
3305 | const ASTContext &Context; |
3306 | QualType ElementType; |
3307 | Expr *SizeExpr; |
3308 | SourceLocation Loc; |
3309 | |
3310 | DependentVectorType(const ASTContext &Context, QualType ElementType, |
3311 | QualType CanonType, Expr *SizeExpr, |
3312 | SourceLocation Loc, VectorType::VectorKind vecKind); |
3313 | |
3314 | public: |
3315 | Expr *getSizeExpr() const { return SizeExpr; } |
3316 | QualType getElementType() const { return ElementType; } |
3317 | SourceLocation getAttributeLoc() const { return Loc; } |
3318 | VectorType::VectorKind getVectorKind() const { |
3319 | return VectorType::VectorKind(VectorTypeBits.VecKind); |
3320 | } |
3321 | |
3322 | bool isSugared() const { return false; } |
3323 | QualType desugar() const { return QualType(this, 0); } |
3324 | |
3325 | static bool classof(const Type *T) { |
3326 | return T->getTypeClass() == DependentVector; |
3327 | } |
3328 | |
3329 | void Profile(llvm::FoldingSetNodeID &ID) { |
3330 | Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind()); |
3331 | } |
3332 | |
3333 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3334 | QualType ElementType, const Expr *SizeExpr, |
3335 | VectorType::VectorKind VecKind); |
3336 | }; |
3337 | |
3338 | /// ExtVectorType - Extended vector type. This type is created using |
3339 | /// __attribute__((ext_vector_type(n)), where "n" is the number of elements. |
3340 | /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This |
3341 | /// class enables syntactic extensions, like Vector Components for accessing |
3342 | /// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL |
3343 | /// Shading Language). |
3344 | class ExtVectorType : public VectorType { |
3345 | friend class ASTContext; // ASTContext creates these. |
3346 | |
3347 | ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) |
3348 | : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} |
3349 | |
3350 | public: |
3351 | static int getPointAccessorIdx(char c) { |
3352 | switch (c) { |
3353 | default: return -1; |
3354 | case 'x': case 'r': return 0; |
3355 | case 'y': case 'g': return 1; |
3356 | case 'z': case 'b': return 2; |
3357 | case 'w': case 'a': return 3; |
3358 | } |
3359 | } |
3360 | |
3361 | static int getNumericAccessorIdx(char c) { |
3362 | switch (c) { |
3363 | default: return -1; |
3364 | case '0': return 0; |
3365 | case '1': return 1; |
3366 | case '2': return 2; |
3367 | case '3': return 3; |
3368 | case '4': return 4; |
3369 | case '5': return 5; |
3370 | case '6': return 6; |
3371 | case '7': return 7; |
3372 | case '8': return 8; |
3373 | case '9': return 9; |
3374 | case 'A': |
3375 | case 'a': return 10; |
3376 | case 'B': |
3377 | case 'b': return 11; |
3378 | case 'C': |
3379 | case 'c': return 12; |
3380 | case 'D': |
3381 | case 'd': return 13; |
3382 | case 'E': |
3383 | case 'e': return 14; |
3384 | case 'F': |
3385 | case 'f': return 15; |
3386 | } |
3387 | } |
3388 | |
3389 | static int getAccessorIdx(char c, bool isNumericAccessor) { |
3390 | if (isNumericAccessor) |
3391 | return getNumericAccessorIdx(c); |
3392 | else |
3393 | return getPointAccessorIdx(c); |
3394 | } |
3395 | |
3396 | bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const { |
3397 | if (int idx = getAccessorIdx(c, isNumericAccessor)+1) |
3398 | return unsigned(idx-1) < getNumElements(); |
3399 | return false; |
3400 | } |
3401 | |
3402 | bool isSugared() const { return false; } |
3403 | QualType desugar() const { return QualType(this, 0); } |
3404 | |
3405 | static bool classof(const Type *T) { |
3406 | return T->getTypeClass() == ExtVector; |
3407 | } |
3408 | }; |
3409 | |
3410 | /// Represents a matrix type, as defined in the Matrix Types clang extensions. |
3411 | /// __attribute__((matrix_type(rows, columns))), where "rows" specifies |
3412 | /// number of rows and "columns" specifies the number of columns. |
3413 | class MatrixType : public Type, public llvm::FoldingSetNode { |
3414 | protected: |
3415 | friend class ASTContext; |
3416 | |
3417 | /// The element type of the matrix. |
3418 | QualType ElementType; |
3419 | |
3420 | MatrixType(QualType ElementTy, QualType CanonElementTy); |
3421 | |
3422 | MatrixType(TypeClass TypeClass, QualType ElementTy, QualType CanonElementTy, |
3423 | const Expr *RowExpr = nullptr, const Expr *ColumnExpr = nullptr); |
3424 | |
3425 | public: |
3426 | /// Returns type of the elements being stored in the matrix |
3427 | QualType getElementType() const { return ElementType; } |
3428 | |
3429 | /// Valid elements types are the following: |
3430 | /// * an integer type (as in C2x 6.2.5p19), but excluding enumerated types |
3431 | /// and _Bool |
3432 | /// * the standard floating types float or double |
3433 | /// * a half-precision floating point type, if one is supported on the target |
3434 | static bool isValidElementType(QualType T) { |
3435 | return T->isDependentType() || |
3436 | (T->isRealType() && !T->isBooleanType() && !T->isEnumeralType()); |
3437 | } |
3438 | |
3439 | bool isSugared() const { return false; } |
3440 | QualType desugar() const { return QualType(this, 0); } |
3441 | |
3442 | static bool classof(const Type *T) { |
3443 | return T->getTypeClass() == ConstantMatrix || |
3444 | T->getTypeClass() == DependentSizedMatrix; |
3445 | } |
3446 | }; |
3447 | |
3448 | /// Represents a concrete matrix type with constant number of rows and columns |
3449 | class ConstantMatrixType final : public MatrixType { |
3450 | protected: |
3451 | friend class ASTContext; |
3452 | |
3453 | /// The element type of the matrix. |
3454 | // FIXME: Appears to be unused? There is also MatrixType::ElementType... |
3455 | QualType ElementType; |
3456 | |
3457 | /// Number of rows and columns. |
3458 | unsigned NumRows; |
3459 | unsigned NumColumns; |
3460 | |
3461 | static constexpr unsigned MaxElementsPerDimension = (1 << 20) - 1; |
3462 | |
3463 | ConstantMatrixType(QualType MatrixElementType, unsigned NRows, |
3464 | unsigned NColumns, QualType CanonElementType); |
3465 | |
3466 | ConstantMatrixType(TypeClass typeClass, QualType MatrixType, unsigned NRows, |
3467 | unsigned NColumns, QualType CanonElementType); |
3468 | |
3469 | public: |
3470 | /// Returns the number of rows in the matrix. |
3471 | unsigned getNumRows() const { return NumRows; } |
3472 | |
3473 | /// Returns the number of columns in the matrix. |
3474 | unsigned getNumColumns() const { return NumColumns; } |
3475 | |
3476 | /// Returns the number of elements required to embed the matrix into a vector. |
3477 | unsigned getNumElementsFlattened() const { |
3478 | return getNumRows() * getNumColumns(); |
3479 | } |
3480 | |
3481 | /// Returns true if \p NumElements is a valid matrix dimension. |
3482 | static constexpr bool isDimensionValid(size_t NumElements) { |
3483 | return NumElements > 0 && NumElements <= MaxElementsPerDimension; |
3484 | } |
3485 | |
3486 | /// Returns the maximum number of elements per dimension. |
3487 | static constexpr unsigned getMaxElementsPerDimension() { |
3488 | return MaxElementsPerDimension; |
3489 | } |
3490 | |
3491 | void Profile(llvm::FoldingSetNodeID &ID) { |
3492 | Profile(ID, getElementType(), getNumRows(), getNumColumns(), |
3493 | getTypeClass()); |
3494 | } |
3495 | |
3496 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3497 | unsigned NumRows, unsigned NumColumns, |
3498 | TypeClass TypeClass) { |
3499 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3500 | ID.AddInteger(NumRows); |
3501 | ID.AddInteger(NumColumns); |
3502 | ID.AddInteger(TypeClass); |
3503 | } |
3504 | |
3505 | static bool classof(const Type *T) { |
3506 | return T->getTypeClass() == ConstantMatrix; |
3507 | } |
3508 | }; |
3509 | |
3510 | /// Represents a matrix type where the type and the number of rows and columns |
3511 | /// is dependent on a template. |
3512 | class DependentSizedMatrixType final : public MatrixType { |
3513 | friend class ASTContext; |
3514 | |
3515 | const ASTContext &Context; |
3516 | Expr *RowExpr; |
3517 | Expr *ColumnExpr; |
3518 | |
3519 | SourceLocation loc; |
3520 | |
3521 | DependentSizedMatrixType(const ASTContext &Context, QualType ElementType, |
3522 | QualType CanonicalType, Expr *RowExpr, |
3523 | Expr *ColumnExpr, SourceLocation loc); |
3524 | |
3525 | public: |
3526 | QualType getElementType() const { return ElementType; } |
3527 | Expr *getRowExpr() const { return RowExpr; } |
3528 | Expr *getColumnExpr() const { return ColumnExpr; } |
3529 | SourceLocation getAttributeLoc() const { return loc; } |
3530 | |
3531 | bool isSugared() const { return false; } |
3532 | QualType desugar() const { return QualType(this, 0); } |
3533 | |
3534 | static bool classof(const Type *T) { |
3535 | return T->getTypeClass() == DependentSizedMatrix; |
3536 | } |
3537 | |
3538 | void Profile(llvm::FoldingSetNodeID &ID) { |
3539 | Profile(ID, Context, getElementType(), getRowExpr(), getColumnExpr()); |
3540 | } |
3541 | |
3542 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3543 | QualType ElementType, Expr *RowExpr, Expr *ColumnExpr); |
3544 | }; |
3545 | |
3546 | /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base |
3547 | /// class of FunctionNoProtoType and FunctionProtoType. |
3548 | class FunctionType : public Type { |
3549 | // The type returned by the function. |
3550 | QualType ResultType; |
3551 | |
3552 | public: |
3553 | /// Interesting information about a specific parameter that can't simply |
3554 | /// be reflected in parameter's type. This is only used by FunctionProtoType |
3555 | /// but is in FunctionType to make this class available during the |
3556 | /// specification of the bases of FunctionProtoType. |
3557 | /// |
3558 | /// It makes sense to model language features this way when there's some |
3559 | /// sort of parameter-specific override (such as an attribute) that |
3560 | /// affects how the function is called. For example, the ARC ns_consumed |
3561 | /// attribute changes whether a parameter is passed at +0 (the default) |
3562 | /// or +1 (ns_consumed). This must be reflected in the function type, |
3563 | /// but isn't really a change to the parameter type. |
3564 | /// |
3565 | /// One serious disadvantage of modelling language features this way is |
3566 | /// that they generally do not work with language features that attempt |
3567 | /// to destructure types. For example, template argument deduction will |
3568 | /// not be able to match a parameter declared as |
3569 | /// T (*)(U) |
3570 | /// against an argument of type |
3571 | /// void (*)(__attribute__((ns_consumed)) id) |
3572 | /// because the substitution of T=void, U=id into the former will |
3573 | /// not produce the latter. |
3574 | class ExtParameterInfo { |
3575 | enum { |
3576 | ABIMask = 0x0F, |
3577 | IsConsumed = 0x10, |
3578 | HasPassObjSize = 0x20, |
3579 | IsNoEscape = 0x40, |
3580 | }; |
3581 | unsigned char Data = 0; |
3582 | |
3583 | public: |
3584 | ExtParameterInfo() = default; |
3585 | |
3586 | /// Return the ABI treatment of this parameter. |
3587 | ParameterABI getABI() const { return ParameterABI(Data & ABIMask); } |
3588 | ExtParameterInfo withABI(ParameterABI kind) const { |
3589 | ExtParameterInfo copy = *this; |
3590 | copy.Data = (copy.Data & ~ABIMask) | unsigned(kind); |
3591 | return copy; |
3592 | } |
3593 | |
3594 | /// Is this parameter considered "consumed" by Objective-C ARC? |
3595 | /// Consumed parameters must have retainable object type. |
3596 | bool isConsumed() const { return (Data & IsConsumed); } |
3597 | ExtParameterInfo withIsConsumed(bool consumed) const { |
3598 | ExtParameterInfo copy = *this; |
3599 | if (consumed) |
3600 | copy.Data |= IsConsumed; |
3601 | else |
3602 | copy.Data &= ~IsConsumed; |
3603 | return copy; |
3604 | } |
3605 | |
3606 | bool hasPassObjectSize() const { return Data & HasPassObjSize; } |
3607 | ExtParameterInfo withHasPassObjectSize() const { |
3608 | ExtParameterInfo Copy = *this; |
3609 | Copy.Data |= HasPassObjSize; |
3610 | return Copy; |
3611 | } |
3612 | |
3613 | bool isNoEscape() const { return Data & IsNoEscape; } |
3614 | ExtParameterInfo withIsNoEscape(bool NoEscape) const { |
3615 | ExtParameterInfo Copy = *this; |
3616 | if (NoEscape) |
3617 | Copy.Data |= IsNoEscape; |
3618 | else |
3619 | Copy.Data &= ~IsNoEscape; |
3620 | return Copy; |
3621 | } |
3622 | |
3623 | unsigned char getOpaqueValue() const { return Data; } |
3624 | static ExtParameterInfo getFromOpaqueValue(unsigned char data) { |
3625 | ExtParameterInfo result; |
3626 | result.Data = data; |
3627 | return result; |
3628 | } |
3629 | |
3630 | friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3631 | return lhs.Data == rhs.Data; |
3632 | } |
3633 | |
3634 | friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3635 | return lhs.Data != rhs.Data; |
3636 | } |
3637 | }; |
3638 | |
3639 | /// A class which abstracts out some details necessary for |
3640 | /// making a call. |
3641 | /// |
3642 | /// It is not actually used directly for storing this information in |
3643 | /// a FunctionType, although FunctionType does currently use the |
3644 | /// same bit-pattern. |
3645 | /// |
3646 | // If you add a field (say Foo), other than the obvious places (both, |
3647 | // constructors, compile failures), what you need to update is |
3648 | // * Operator== |
3649 | // * getFoo |
3650 | // * withFoo |
3651 | // * functionType. Add Foo, getFoo. |
3652 | // * ASTContext::getFooType |
3653 | // * ASTContext::mergeFunctionTypes |
3654 | // * FunctionNoProtoType::Profile |
3655 | // * FunctionProtoType::Profile |
3656 | // * TypePrinter::PrintFunctionProto |
3657 | // * AST read and write |
3658 | // * Codegen |
3659 | class ExtInfo { |
3660 | friend class FunctionType; |
3661 | |
3662 | // Feel free to rearrange or add bits, but if you go over 16, you'll need to |
3663 | // adjust the Bits field below, and if you add bits, you'll need to adjust |
3664 | // Type::FunctionTypeBitfields::ExtInfo as well. |
3665 | |
3666 | // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck|cmsenscall| |
3667 | // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 | 12 | |
3668 | // |
3669 | // regparm is either 0 (no regparm attribute) or the regparm value+1. |
3670 | enum { CallConvMask = 0x1F }; |
3671 | enum { NoReturnMask = 0x20 }; |
3672 | enum { ProducesResultMask = 0x40 }; |
3673 | enum { NoCallerSavedRegsMask = 0x80 }; |
3674 | enum { |
3675 | RegParmMask = 0x700, |
3676 | RegParmOffset = 8 |
3677 | }; |
3678 | enum { NoCfCheckMask = 0x800 }; |
3679 | enum { CmseNSCallMask = 0x1000 }; |
3680 | uint16_t Bits = CC_C; |
3681 | |
3682 | ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} |
3683 | |
3684 | public: |
3685 | // Constructor with no defaults. Use this when you know that you |
3686 | // have all the elements (when reading an AST file for example). |
3687 | ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, |
3688 | bool producesResult, bool noCallerSavedRegs, bool NoCfCheck, |
3689 | bool cmseNSCall) { |
3690 | assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(static_cast <bool> ((!hasRegParm || regParm < 7) && "Invalid regparm value") ? void (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 3690, __extension__ __PRETTY_FUNCTION__)); |
3691 | Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) | |
3692 | (producesResult ? ProducesResultMask : 0) | |
3693 | (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) | |
3694 | (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) | |
3695 | (NoCfCheck ? NoCfCheckMask : 0) | |
3696 | (cmseNSCall ? CmseNSCallMask : 0); |
3697 | } |
3698 | |
3699 | // Constructor with all defaults. Use when for example creating a |
3700 | // function known to use defaults. |
3701 | ExtInfo() = default; |
3702 | |
3703 | // Constructor with just the calling convention, which is an important part |
3704 | // of the canonical type. |
3705 | ExtInfo(CallingConv CC) : Bits(CC) {} |
3706 | |
3707 | bool getNoReturn() const { return Bits & NoReturnMask; } |
3708 | bool getProducesResult() const { return Bits & ProducesResultMask; } |
3709 | bool getCmseNSCall() const { return Bits & CmseNSCallMask; } |
3710 | bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; } |
3711 | bool getNoCfCheck() const { return Bits & NoCfCheckMask; } |
3712 | bool getHasRegParm() const { return ((Bits & RegParmMask) >> RegParmOffset) != 0; } |
3713 | |
3714 | unsigned getRegParm() const { |
3715 | unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset; |
3716 | if (RegParm > 0) |
3717 | --RegParm; |
3718 | return RegParm; |
3719 | } |
3720 | |
3721 | CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } |
3722 | |
3723 | bool operator==(ExtInfo Other) const { |
3724 | return Bits == Other.Bits; |
3725 | } |
3726 | bool operator!=(ExtInfo Other) const { |
3727 | return Bits != Other.Bits; |
3728 | } |
3729 | |
3730 | // Note that we don't have setters. That is by design, use |
3731 | // the following with methods instead of mutating these objects. |
3732 | |
3733 | ExtInfo withNoReturn(bool noReturn) const { |
3734 | if (noReturn) |
3735 | return ExtInfo(Bits | NoReturnMask); |
3736 | else |
3737 | return ExtInfo(Bits & ~NoReturnMask); |
3738 | } |
3739 | |
3740 | ExtInfo withProducesResult(bool producesResult) const { |
3741 | if (producesResult) |
3742 | return ExtInfo(Bits | ProducesResultMask); |
3743 | else |
3744 | return ExtInfo(Bits & ~ProducesResultMask); |
3745 | } |
3746 | |
3747 | ExtInfo withCmseNSCall(bool cmseNSCall) const { |
3748 | if (cmseNSCall) |
3749 | return ExtInfo(Bits | CmseNSCallMask); |
3750 | else |
3751 | return ExtInfo(Bits & ~CmseNSCallMask); |
3752 | } |
3753 | |
3754 | ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const { |
3755 | if (noCallerSavedRegs) |
3756 | return ExtInfo(Bits | NoCallerSavedRegsMask); |
3757 | else |
3758 | return ExtInfo(Bits & ~NoCallerSavedRegsMask); |
3759 | } |
3760 | |
3761 | ExtInfo withNoCfCheck(bool noCfCheck) const { |
3762 | if (noCfCheck) |
3763 | return ExtInfo(Bits | NoCfCheckMask); |
3764 | else |
3765 | return ExtInfo(Bits & ~NoCfCheckMask); |
3766 | } |
3767 | |
3768 | ExtInfo withRegParm(unsigned RegParm) const { |
3769 | assert(RegParm < 7 && "Invalid regparm value")(static_cast <bool> (RegParm < 7 && "Invalid regparm value" ) ? void (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 3769, __extension__ __PRETTY_FUNCTION__)); |
3770 | return ExtInfo((Bits & ~RegParmMask) | |
3771 | ((RegParm + 1) << RegParmOffset)); |
3772 | } |
3773 | |
3774 | ExtInfo withCallingConv(CallingConv cc) const { |
3775 | return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); |
3776 | } |
3777 | |
3778 | void Profile(llvm::FoldingSetNodeID &ID) const { |
3779 | ID.AddInteger(Bits); |
3780 | } |
3781 | }; |
3782 | |
3783 | /// A simple holder for a QualType representing a type in an |
3784 | /// exception specification. Unfortunately needed by FunctionProtoType |
3785 | /// because TrailingObjects cannot handle repeated types. |
3786 | struct ExceptionType { QualType Type; }; |
3787 | |
3788 | /// A simple holder for various uncommon bits which do not fit in |
3789 | /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the |
3790 | /// alignment of subsequent objects in TrailingObjects. You must update |
3791 | /// hasExtraBitfields in FunctionProtoType after adding extra data here. |
3792 | struct alignas(void *) FunctionTypeExtraBitfields { |
3793 | /// The number of types in the exception specification. |
3794 | /// A whole unsigned is not needed here and according to |
3795 | /// [implimits] 8 bits would be enough here. |
3796 | unsigned NumExceptionType; |
3797 | }; |
3798 | |
3799 | protected: |
3800 | FunctionType(TypeClass tc, QualType res, QualType Canonical, |
3801 | TypeDependence Dependence, ExtInfo Info) |
3802 | : Type(tc, Canonical, Dependence), ResultType(res) { |
3803 | FunctionTypeBits.ExtInfo = Info.Bits; |
3804 | } |
3805 | |
3806 | Qualifiers getFastTypeQuals() const { |
3807 | return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals); |
3808 | } |
3809 | |
3810 | public: |
3811 | QualType getReturnType() const { return ResultType; } |
3812 | |
3813 | bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } |
3814 | unsigned getRegParmType() const { return getExtInfo().getRegParm(); } |
3815 | |
3816 | /// Determine whether this function type includes the GNU noreturn |
3817 | /// attribute. The C++11 [[noreturn]] attribute does not affect the function |
3818 | /// type. |
3819 | bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } |
3820 | |
3821 | bool getCmseNSCallAttr() const { return getExtInfo().getCmseNSCall(); } |
3822 | CallingConv getCallConv() const { return getExtInfo().getCC(); } |
3823 | ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } |
3824 | |
3825 | static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0, |
3826 | "Const, volatile and restrict are assumed to be a subset of " |
3827 | "the fast qualifiers."); |
3828 | |
3829 | bool isConst() const { return getFastTypeQuals().hasConst(); } |
3830 | bool isVolatile() const { return getFastTypeQuals().hasVolatile(); } |
3831 | bool isRestrict() const { return getFastTypeQuals().hasRestrict(); } |
3832 | |
3833 | /// Determine the type of an expression that calls a function of |
3834 | /// this type. |
3835 | QualType getCallResultType(const ASTContext &Context) const { |
3836 | return getReturnType().getNonLValueExprType(Context); |
3837 | } |
3838 | |
3839 | static StringRef getNameForCallConv(CallingConv CC); |
3840 | |
3841 | static bool classof(const Type *T) { |
3842 | return T->getTypeClass() == FunctionNoProto || |
3843 | T->getTypeClass() == FunctionProto; |
3844 | } |
3845 | }; |
3846 | |
3847 | /// Represents a K&R-style 'int foo()' function, which has |
3848 | /// no information available about its arguments. |
3849 | class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { |
3850 | friend class ASTContext; // ASTContext creates these. |
3851 | |
3852 | FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) |
3853 | : FunctionType(FunctionNoProto, Result, Canonical, |
3854 | Result->getDependence() & |
3855 | ~(TypeDependence::DependentInstantiation | |
3856 | TypeDependence::UnexpandedPack), |
3857 | Info) {} |
3858 | |
3859 | public: |
3860 | // No additional state past what FunctionType provides. |
3861 | |
3862 | bool isSugared() const { return false; } |
3863 | QualType desugar() const { return QualType(this, 0); } |
3864 | |
3865 | void Profile(llvm::FoldingSetNodeID &ID) { |
3866 | Profile(ID, getReturnType(), getExtInfo()); |
3867 | } |
3868 | |
3869 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, |
3870 | ExtInfo Info) { |
3871 | Info.Profile(ID); |
3872 | ID.AddPointer(ResultType.getAsOpaquePtr()); |
3873 | } |
3874 | |
3875 | static bool classof(const Type *T) { |
3876 | return T->getTypeClass() == FunctionNoProto; |
3877 | } |
3878 | }; |
3879 | |
3880 | /// Represents a prototype with parameter type info, e.g. |
3881 | /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no |
3882 | /// parameters, not as having a single void parameter. Such a type can have |
3883 | /// an exception specification, but this specification is not part of the |
3884 | /// canonical type. FunctionProtoType has several trailing objects, some of |
3885 | /// which optional. For more information about the trailing objects see |
3886 | /// the first comment inside FunctionProtoType. |
3887 | class FunctionProtoType final |
3888 | : public FunctionType, |
3889 | public llvm::FoldingSetNode, |
3890 | private llvm::TrailingObjects< |
3891 | FunctionProtoType, QualType, SourceLocation, |
3892 | FunctionType::FunctionTypeExtraBitfields, FunctionType::ExceptionType, |
3893 | Expr *, FunctionDecl *, FunctionType::ExtParameterInfo, Qualifiers> { |
3894 | friend class ASTContext; // ASTContext creates these. |
3895 | friend TrailingObjects; |
3896 | |
3897 | // FunctionProtoType is followed by several trailing objects, some of |
3898 | // which optional. They are in order: |
3899 | // |
3900 | // * An array of getNumParams() QualType holding the parameter types. |
3901 | // Always present. Note that for the vast majority of FunctionProtoType, |
3902 | // these will be the only trailing objects. |
3903 | // |
3904 | // * Optionally if the function is variadic, the SourceLocation of the |
3905 | // ellipsis. |
3906 | // |
3907 | // * Optionally if some extra data is stored in FunctionTypeExtraBitfields |
3908 | // (see FunctionTypeExtraBitfields and FunctionTypeBitfields): |
3909 | // a single FunctionTypeExtraBitfields. Present if and only if |
3910 | // hasExtraBitfields() is true. |
3911 | // |
3912 | // * Optionally exactly one of: |
3913 | // * an array of getNumExceptions() ExceptionType, |
3914 | // * a single Expr *, |
3915 | // * a pair of FunctionDecl *, |
3916 | // * a single FunctionDecl * |
3917 | // used to store information about the various types of exception |
3918 | // specification. See getExceptionSpecSize for the details. |
3919 | // |
3920 | // * Optionally an array of getNumParams() ExtParameterInfo holding |
3921 | // an ExtParameterInfo for each of the parameters. Present if and |
3922 | // only if hasExtParameterInfos() is true. |
3923 | // |
3924 | // * Optionally a Qualifiers object to represent extra qualifiers that can't |
3925 | // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only |
3926 | // if hasExtQualifiers() is true. |
3927 | // |
3928 | // The optional FunctionTypeExtraBitfields has to be before the data |
3929 | // related to the exception specification since it contains the number |
3930 | // of exception types. |
3931 | // |
3932 | // We put the ExtParameterInfos last. If all were equal, it would make |
3933 | // more sense to put these before the exception specification, because |
3934 | // it's much easier to skip past them compared to the elaborate switch |
3935 | // required to skip the exception specification. However, all is not |
3936 | // equal; ExtParameterInfos are used to model very uncommon features, |
3937 | // and it's better not to burden the more common paths. |
3938 | |
3939 | public: |
3940 | /// Holds information about the various types of exception specification. |
3941 | /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is |
3942 | /// used to group together the various bits of information about the |
3943 | /// exception specification. |
3944 | struct ExceptionSpecInfo { |
3945 | /// The kind of exception specification this is. |
3946 | ExceptionSpecificationType Type = EST_None; |
3947 | |
3948 | /// Explicitly-specified list of exception types. |
3949 | ArrayRef<QualType> Exceptions; |
3950 | |
3951 | /// Noexcept expression, if this is a computed noexcept specification. |
3952 | Expr *NoexceptExpr = nullptr; |
3953 | |
3954 | /// The function whose exception specification this is, for |
3955 | /// EST_Unevaluated and EST_Uninstantiated. |
3956 | FunctionDecl *SourceDecl = nullptr; |
3957 | |
3958 | /// The function template whose exception specification this is instantiated |
3959 | /// from, for EST_Uninstantiated. |
3960 | FunctionDecl *SourceTemplate = nullptr; |
3961 | |
3962 | ExceptionSpecInfo() = default; |
3963 | |
3964 | ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {} |
3965 | }; |
3966 | |
3967 | /// Extra information about a function prototype. ExtProtoInfo is not |
3968 | /// stored as such in FunctionProtoType but is used to group together |
3969 | /// the various bits of extra information about a function prototype. |
3970 | struct ExtProtoInfo { |
3971 | FunctionType::ExtInfo ExtInfo; |
3972 | bool Variadic : 1; |
3973 | bool HasTrailingReturn : 1; |
3974 | Qualifiers TypeQuals; |
3975 | RefQualifierKind RefQualifier = RQ_None; |
3976 | ExceptionSpecInfo ExceptionSpec; |
3977 | const ExtParameterInfo *ExtParameterInfos = nullptr; |
3978 | SourceLocation EllipsisLoc; |
3979 | |
3980 | ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {} |
3981 | |
3982 | ExtProtoInfo(CallingConv CC) |
3983 | : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {} |
3984 | |
3985 | ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) { |
3986 | ExtProtoInfo Result(*this); |
3987 | Result.ExceptionSpec = ESI; |
3988 | return Result; |
3989 | } |
3990 | }; |
3991 | |
3992 | private: |
3993 | unsigned numTrailingObjects(OverloadToken<QualType>) const { |
3994 | return getNumParams(); |
3995 | } |
3996 | |
3997 | unsigned numTrailingObjects(OverloadToken<SourceLocation>) const { |
3998 | return isVariadic(); |
3999 | } |
4000 | |
4001 | unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const { |
4002 | return hasExtraBitfields(); |
4003 | } |
4004 | |
4005 | unsigned numTrailingObjects(OverloadToken<ExceptionType>) const { |
4006 | return getExceptionSpecSize().NumExceptionType; |
4007 | } |
4008 | |
4009 | unsigned numTrailingObjects(OverloadToken<Expr *>) const { |
4010 | return getExceptionSpecSize().NumExprPtr; |
4011 | } |
4012 | |
4013 | unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const { |
4014 | return getExceptionSpecSize().NumFunctionDeclPtr; |
4015 | } |
4016 | |
4017 | unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const { |
4018 | return hasExtParameterInfos() ? getNumParams() : 0; |
4019 | } |
4020 | |
4021 | /// Determine whether there are any argument types that |
4022 | /// contain an unexpanded parameter pack. |
4023 | static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, |
4024 | unsigned numArgs) { |
4025 | for (unsigned Idx = 0; Idx < numArgs; ++Idx) |
4026 | if (ArgArray[Idx]->containsUnexpandedParameterPack()) |
4027 | return true; |
4028 | |
4029 | return false; |
4030 | } |
4031 | |
4032 | FunctionProtoType(QualType result, ArrayRef<QualType> params, |
4033 | QualType canonical, const ExtProtoInfo &epi); |
4034 | |
4035 | /// This struct is returned by getExceptionSpecSize and is used to |
4036 | /// translate an ExceptionSpecificationType to the number and kind |
4037 | /// of trailing objects related to the exception specification. |
4038 | struct ExceptionSpecSizeHolder { |
4039 | unsigned NumExceptionType; |
4040 | unsigned NumExprPtr; |
4041 | unsigned NumFunctionDeclPtr; |
4042 | }; |
4043 | |
4044 | /// Return the number and kind of trailing objects |
4045 | /// related to the exception specification. |
4046 | static ExceptionSpecSizeHolder |
4047 | getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) { |
4048 | switch (EST) { |
4049 | case EST_None: |
4050 | case EST_DynamicNone: |
4051 | case EST_MSAny: |
4052 | case EST_BasicNoexcept: |
4053 | case EST_Unparsed: |
4054 | case EST_NoThrow: |
4055 | return {0, 0, 0}; |
4056 | |
4057 | case EST_Dynamic: |
4058 | return {NumExceptions, 0, 0}; |
4059 | |
4060 | case EST_DependentNoexcept: |
4061 | case EST_NoexceptFalse: |
4062 | case EST_NoexceptTrue: |
4063 | return {0, 1, 0}; |
4064 | |
4065 | case EST_Uninstantiated: |
4066 | return {0, 0, 2}; |
4067 | |
4068 | case EST_Unevaluated: |
4069 | return {0, 0, 1}; |
4070 | } |
4071 | llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4071); |
4072 | } |
4073 | |
4074 | /// Return the number and kind of trailing objects |
4075 | /// related to the exception specification. |
4076 | ExceptionSpecSizeHolder getExceptionSpecSize() const { |
4077 | return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions()); |
4078 | } |
4079 | |
4080 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
4081 | static bool hasExtraBitfields(ExceptionSpecificationType EST) { |
4082 | // If the exception spec type is EST_Dynamic then we have > 0 exception |
4083 | // types and the exact number is stored in FunctionTypeExtraBitfields. |
4084 | return EST == EST_Dynamic; |
4085 | } |
4086 | |
4087 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
4088 | bool hasExtraBitfields() const { |
4089 | return hasExtraBitfields(getExceptionSpecType()); |
4090 | } |
4091 | |
4092 | bool hasExtQualifiers() const { |
4093 | return FunctionTypeBits.HasExtQuals; |
4094 | } |
4095 | |
4096 | public: |
4097 | unsigned getNumParams() const { return FunctionTypeBits.NumParams; } |
4098 | |
4099 | QualType getParamType(unsigned i) const { |
4100 | assert(i < getNumParams() && "invalid parameter index")(static_cast <bool> (i < getNumParams() && "invalid parameter index" ) ? void (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4100, __extension__ __PRETTY_FUNCTION__)); |
4101 | return param_type_begin()[i]; |
4102 | } |
4103 | |
4104 | ArrayRef<QualType> getParamTypes() const { |
4105 | return llvm::makeArrayRef(param_type_begin(), param_type_end()); |
4106 | } |
4107 | |
4108 | ExtProtoInfo getExtProtoInfo() const { |
4109 | ExtProtoInfo EPI; |
4110 | EPI.ExtInfo = getExtInfo(); |
4111 | EPI.Variadic = isVariadic(); |
4112 | EPI.EllipsisLoc = getEllipsisLoc(); |
4113 | EPI.HasTrailingReturn = hasTrailingReturn(); |
4114 | EPI.ExceptionSpec = getExceptionSpecInfo(); |
4115 | EPI.TypeQuals = getMethodQuals(); |
4116 | EPI.RefQualifier = getRefQualifier(); |
4117 | EPI.ExtParameterInfos = getExtParameterInfosOrNull(); |
4118 | return EPI; |
4119 | } |
4120 | |
4121 | /// Get the kind of exception specification on this function. |
4122 | ExceptionSpecificationType getExceptionSpecType() const { |
4123 | return static_cast<ExceptionSpecificationType>( |
4124 | FunctionTypeBits.ExceptionSpecType); |
4125 | } |
4126 | |
4127 | /// Return whether this function has any kind of exception spec. |
4128 | bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; } |
4129 | |
4130 | /// Return whether this function has a dynamic (throw) exception spec. |
4131 | bool hasDynamicExceptionSpec() const { |
4132 | return isDynamicExceptionSpec(getExceptionSpecType()); |
4133 | } |
4134 | |
4135 | /// Return whether this function has a noexcept exception spec. |
4136 | bool hasNoexceptExceptionSpec() const { |
4137 | return isNoexceptExceptionSpec(getExceptionSpecType()); |
4138 | } |
4139 | |
4140 | /// Return whether this function has a dependent exception spec. |
4141 | bool hasDependentExceptionSpec() const; |
4142 | |
4143 | /// Return whether this function has an instantiation-dependent exception |
4144 | /// spec. |
4145 | bool hasInstantiationDependentExceptionSpec() const; |
4146 | |
4147 | /// Return all the available information about this type's exception spec. |
4148 | ExceptionSpecInfo getExceptionSpecInfo() const { |
4149 | ExceptionSpecInfo Result; |
4150 | Result.Type = getExceptionSpecType(); |
4151 | if (Result.Type == EST_Dynamic) { |
4152 | Result.Exceptions = exceptions(); |
4153 | } else if (isComputedNoexcept(Result.Type)) { |
4154 | Result.NoexceptExpr = getNoexceptExpr(); |
4155 | } else if (Result.Type == EST_Uninstantiated) { |
4156 | Result.SourceDecl = getExceptionSpecDecl(); |
4157 | Result.SourceTemplate = getExceptionSpecTemplate(); |
4158 | } else if (Result.Type == EST_Unevaluated) { |
4159 | Result.SourceDecl = getExceptionSpecDecl(); |
4160 | } |
4161 | return Result; |
4162 | } |
4163 | |
4164 | /// Return the number of types in the exception specification. |
4165 | unsigned getNumExceptions() const { |
4166 | return getExceptionSpecType() == EST_Dynamic |
4167 | ? getTrailingObjects<FunctionTypeExtraBitfields>() |
4168 | ->NumExceptionType |
4169 | : 0; |
4170 | } |
4171 | |
4172 | /// Return the ith exception type, where 0 <= i < getNumExceptions(). |
4173 | QualType getExceptionType(unsigned i) const { |
4174 | assert(i < getNumExceptions() && "Invalid exception number!")(static_cast <bool> (i < getNumExceptions() && "Invalid exception number!") ? void (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4174, __extension__ __PRETTY_FUNCTION__)); |
4175 | return exception_begin()[i]; |
4176 | } |
4177 | |
4178 | /// Return the expression inside noexcept(expression), or a null pointer |
4179 | /// if there is none (because the exception spec is not of this form). |
4180 | Expr *getNoexceptExpr() const { |
4181 | if (!isComputedNoexcept(getExceptionSpecType())) |
4182 | return nullptr; |
4183 | return *getTrailingObjects<Expr *>(); |
4184 | } |
4185 | |
4186 | /// If this function type has an exception specification which hasn't |
4187 | /// been determined yet (either because it has not been evaluated or because |
4188 | /// it has not been instantiated), this is the function whose exception |
4189 | /// specification is represented by this type. |
4190 | FunctionDecl *getExceptionSpecDecl() const { |
4191 | if (getExceptionSpecType() != EST_Uninstantiated && |
4192 | getExceptionSpecType() != EST_Unevaluated) |
4193 | return nullptr; |
4194 | return getTrailingObjects<FunctionDecl *>()[0]; |
4195 | } |
4196 | |
4197 | /// If this function type has an uninstantiated exception |
4198 | /// specification, this is the function whose exception specification |
4199 | /// should be instantiated to find the exception specification for |
4200 | /// this type. |
4201 | FunctionDecl *getExceptionSpecTemplate() const { |
4202 | if (getExceptionSpecType() != EST_Uninstantiated) |
4203 | return nullptr; |
4204 | return getTrailingObjects<FunctionDecl *>()[1]; |
4205 | } |
4206 | |
4207 | /// Determine whether this function type has a non-throwing exception |
4208 | /// specification. |
4209 | CanThrowResult canThrow() const; |
4210 | |
4211 | /// Determine whether this function type has a non-throwing exception |
4212 | /// specification. If this depends on template arguments, returns |
4213 | /// \c ResultIfDependent. |
4214 | bool isNothrow(bool ResultIfDependent = false) const { |
4215 | return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot; |
4216 | } |
4217 | |
4218 | /// Whether this function prototype is variadic. |
4219 | bool isVariadic() const { return FunctionTypeBits.Variadic; } |
4220 | |
4221 | SourceLocation getEllipsisLoc() const { |
4222 | return isVariadic() ? *getTrailingObjects<SourceLocation>() |
4223 | : SourceLocation(); |
4224 | } |
4225 | |
4226 | /// Determines whether this function prototype contains a |
4227 | /// parameter pack at the end. |
4228 | /// |
4229 | /// A function template whose last parameter is a parameter pack can be |
4230 | /// called with an arbitrary number of arguments, much like a variadic |
4231 | /// function. |
4232 | bool isTemplateVariadic() const; |
4233 | |
4234 | /// Whether this function prototype has a trailing return type. |
4235 | bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; } |
4236 | |
4237 | Qualifiers getMethodQuals() const { |
4238 | if (hasExtQualifiers()) |
4239 | return *getTrailingObjects<Qualifiers>(); |
4240 | else |
4241 | return getFastTypeQuals(); |
4242 | } |
4243 | |
4244 | /// Retrieve the ref-qualifier associated with this function type. |
4245 | RefQualifierKind getRefQualifier() const { |
4246 | return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); |
4247 | } |
4248 | |
4249 | using param_type_iterator = const QualType *; |
4250 | using param_type_range = llvm::iterator_range<param_type_iterator>; |
4251 | |
4252 | param_type_range param_types() const { |
4253 | return param_type_range(param_type_begin(), param_type_end()); |
4254 | } |
4255 | |
4256 | param_type_iterator param_type_begin() const { |
4257 | return getTrailingObjects<QualType>(); |
4258 | } |
4259 | |
4260 | param_type_iterator param_type_end() const { |
4261 | return param_type_begin() + getNumParams(); |
4262 | } |
4263 | |
4264 | using exception_iterator = const QualType *; |
4265 | |
4266 | ArrayRef<QualType> exceptions() const { |
4267 | return llvm::makeArrayRef(exception_begin(), exception_end()); |
4268 | } |
4269 | |
4270 | exception_iterator exception_begin() const { |
4271 | return reinterpret_cast<exception_iterator>( |
4272 | getTrailingObjects<ExceptionType>()); |
4273 | } |
4274 | |
4275 | exception_iterator exception_end() const { |
4276 | return exception_begin() + getNumExceptions(); |
4277 | } |
4278 | |
4279 | /// Is there any interesting extra information for any of the parameters |
4280 | /// of this function type? |
4281 | bool hasExtParameterInfos() const { |
4282 | return FunctionTypeBits.HasExtParameterInfos; |
4283 | } |
4284 | |
4285 | ArrayRef<ExtParameterInfo> getExtParameterInfos() const { |
4286 | assert(hasExtParameterInfos())(static_cast <bool> (hasExtParameterInfos()) ? void (0) : __assert_fail ("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4286, __extension__ __PRETTY_FUNCTION__)); |
4287 | return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(), |
4288 | getNumParams()); |
4289 | } |
4290 | |
4291 | /// Return a pointer to the beginning of the array of extra parameter |
4292 | /// information, if present, or else null if none of the parameters |
4293 | /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos. |
4294 | const ExtParameterInfo *getExtParameterInfosOrNull() const { |
4295 | if (!hasExtParameterInfos()) |
4296 | return nullptr; |
4297 | return getTrailingObjects<ExtParameterInfo>(); |
4298 | } |
4299 | |
4300 | ExtParameterInfo getExtParameterInfo(unsigned I) const { |
4301 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4301, __extension__ __PRETTY_FUNCTION__)); |
4302 | if (hasExtParameterInfos()) |
4303 | return getTrailingObjects<ExtParameterInfo>()[I]; |
4304 | return ExtParameterInfo(); |
4305 | } |
4306 | |
4307 | ParameterABI getParameterABI(unsigned I) const { |
4308 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4308, __extension__ __PRETTY_FUNCTION__)); |
4309 | if (hasExtParameterInfos()) |
4310 | return getTrailingObjects<ExtParameterInfo>()[I].getABI(); |
4311 | return ParameterABI::Ordinary; |
4312 | } |
4313 | |
4314 | bool isParamConsumed(unsigned I) const { |
4315 | assert(I < getNumParams() && "parameter index out of range")(static_cast <bool> (I < getNumParams() && "parameter index out of range" ) ? void (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4315, __extension__ __PRETTY_FUNCTION__)); |
4316 | if (hasExtParameterInfos()) |
4317 | return getTrailingObjects<ExtParameterInfo>()[I].isConsumed(); |
4318 | return false; |
4319 | } |
4320 | |
4321 | bool isSugared() const { return false; } |
4322 | QualType desugar() const { return QualType(this, 0); } |
4323 | |
4324 | void printExceptionSpecification(raw_ostream &OS, |
4325 | const PrintingPolicy &Policy) const; |
4326 | |
4327 | static bool classof(const Type *T) { |
4328 | return T->getTypeClass() == FunctionProto; |
4329 | } |
4330 | |
4331 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); |
4332 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, |
4333 | param_type_iterator ArgTys, unsigned NumArgs, |
4334 | const ExtProtoInfo &EPI, const ASTContext &Context, |
4335 | bool Canonical); |
4336 | }; |
4337 | |
4338 | /// Represents the dependent type named by a dependently-scoped |
4339 | /// typename using declaration, e.g. |
4340 | /// using typename Base<T>::foo; |
4341 | /// |
4342 | /// Template instantiation turns these into the underlying type. |
4343 | class UnresolvedUsingType : public Type { |
4344 | friend class ASTContext; // ASTContext creates these. |
4345 | |
4346 | UnresolvedUsingTypenameDecl *Decl; |
4347 | |
4348 | UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) |
4349 | : Type(UnresolvedUsing, QualType(), |
4350 | TypeDependence::DependentInstantiation), |
4351 | Decl(const_cast<UnresolvedUsingTypenameDecl *>(D)) {} |
4352 | |
4353 | public: |
4354 | UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } |
4355 | |
4356 | bool isSugared() const { return false; } |
4357 | QualType desugar() const { return QualType(this, 0); } |
4358 | |
4359 | static bool classof(const Type *T) { |
4360 | return T->getTypeClass() == UnresolvedUsing; |
4361 | } |
4362 | |
4363 | void Profile(llvm::FoldingSetNodeID &ID) { |
4364 | return Profile(ID, Decl); |
4365 | } |
4366 | |
4367 | static void Profile(llvm::FoldingSetNodeID &ID, |
4368 | UnresolvedUsingTypenameDecl *D) { |
4369 | ID.AddPointer(D); |
4370 | } |
4371 | }; |
4372 | |
4373 | class TypedefType : public Type { |
4374 | TypedefNameDecl *Decl; |
4375 | |
4376 | private: |
4377 | friend class ASTContext; // ASTContext creates these. |
4378 | |
4379 | TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType underlying, |
4380 | QualType can); |
4381 | |
4382 | public: |
4383 | TypedefNameDecl *getDecl() const { return Decl; } |
4384 | |
4385 | bool isSugared() const { return true; } |
4386 | QualType desugar() const; |
4387 | |
4388 | static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } |
4389 | }; |
4390 | |
4391 | /// Sugar type that represents a type that was qualified by a qualifier written |
4392 | /// as a macro invocation. |
4393 | class MacroQualifiedType : public Type { |
4394 | friend class ASTContext; // ASTContext creates these. |
4395 | |
4396 | QualType UnderlyingTy; |
4397 | const IdentifierInfo *MacroII; |
4398 | |
4399 | MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy, |
4400 | const IdentifierInfo *MacroII) |
4401 | : Type(MacroQualified, CanonTy, UnderlyingTy->getDependence()), |
4402 | UnderlyingTy(UnderlyingTy), MacroII(MacroII) { |
4403 | assert(isa<AttributedType>(UnderlyingTy) &&(static_cast <bool> (isa<AttributedType>(UnderlyingTy ) && "Expected a macro qualified type to only wrap attributed types." ) ? void (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4404, __extension__ __PRETTY_FUNCTION__)) |
4404 | "Expected a macro qualified type to only wrap attributed types.")(static_cast <bool> (isa<AttributedType>(UnderlyingTy ) && "Expected a macro qualified type to only wrap attributed types." ) ? void (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4404, __extension__ __PRETTY_FUNCTION__)); |
4405 | } |
4406 | |
4407 | public: |
4408 | const IdentifierInfo *getMacroIdentifier() const { return MacroII; } |
4409 | QualType getUnderlyingType() const { return UnderlyingTy; } |
4410 | |
4411 | /// Return this attributed type's modified type with no qualifiers attached to |
4412 | /// it. |
4413 | QualType getModifiedType() const; |
4414 | |
4415 | bool isSugared() const { return true; } |
4416 | QualType desugar() const; |
4417 | |
4418 | static bool classof(const Type *T) { |
4419 | return T->getTypeClass() == MacroQualified; |
4420 | } |
4421 | }; |
4422 | |
4423 | /// Represents a `typeof` (or __typeof__) expression (a GCC extension). |
4424 | class TypeOfExprType : public Type { |
4425 | Expr *TOExpr; |
4426 | |
4427 | protected: |
4428 | friend class ASTContext; // ASTContext creates these. |
4429 | |
4430 | TypeOfExprType(Expr *E, QualType can = QualType()); |
4431 | |
4432 | public: |
4433 | Expr *getUnderlyingExpr() const { return TOExpr; } |
4434 | |
4435 | /// Remove a single level of sugar. |
4436 | QualType desugar() const; |
4437 | |
4438 | /// Returns whether this type directly provides sugar. |
4439 | bool isSugared() const; |
4440 | |
4441 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } |
4442 | }; |
4443 | |
4444 | /// Internal representation of canonical, dependent |
4445 | /// `typeof(expr)` types. |
4446 | /// |
4447 | /// This class is used internally by the ASTContext to manage |
4448 | /// canonical, dependent types, only. Clients will only see instances |
4449 | /// of this class via TypeOfExprType nodes. |
4450 | class DependentTypeOfExprType |
4451 | : public TypeOfExprType, public llvm::FoldingSetNode { |
4452 | const ASTContext &Context; |
4453 | |
4454 | public: |
4455 | DependentTypeOfExprType(const ASTContext &Context, Expr *E) |
4456 | : TypeOfExprType(E), Context(Context) {} |
4457 | |
4458 | void Profile(llvm::FoldingSetNodeID &ID) { |
4459 | Profile(ID, Context, getUnderlyingExpr()); |
4460 | } |
4461 | |
4462 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4463 | Expr *E); |
4464 | }; |
4465 | |
4466 | /// Represents `typeof(type)`, a GCC extension. |
4467 | class TypeOfType : public Type { |
4468 | friend class ASTContext; // ASTContext creates these. |
4469 | |
4470 | QualType TOType; |
4471 | |
4472 | TypeOfType(QualType T, QualType can) |
4473 | : Type(TypeOf, can, T->getDependence()), TOType(T) { |
4474 | assert(!isa<TypedefType>(can) && "Invalid canonical type")(static_cast <bool> (!isa<TypedefType>(can) && "Invalid canonical type") ? void (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4474, __extension__ __PRETTY_FUNCTION__)); |
4475 | } |
4476 | |
4477 | public: |
4478 | QualType getUnderlyingType() const { return TOType; } |
4479 | |
4480 | /// Remove a single level of sugar. |
4481 | QualType desugar() const { return getUnderlyingType(); } |
4482 | |
4483 | /// Returns whether this type directly provides sugar. |
4484 | bool isSugared() const { return true; } |
4485 | |
4486 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } |
4487 | }; |
4488 | |
4489 | /// Represents the type `decltype(expr)` (C++11). |
4490 | class DecltypeType : public Type { |
4491 | Expr *E; |
4492 | QualType UnderlyingType; |
4493 | |
4494 | protected: |
4495 | friend class ASTContext; // ASTContext creates these. |
4496 | |
4497 | DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); |
4498 | |
4499 | public: |
4500 | Expr *getUnderlyingExpr() const { return E; } |
4501 | QualType getUnderlyingType() const { return UnderlyingType; } |
4502 | |
4503 | /// Remove a single level of sugar. |
4504 | QualType desugar() const; |
4505 | |
4506 | /// Returns whether this type directly provides sugar. |
4507 | bool isSugared() const; |
4508 | |
4509 | static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } |
4510 | }; |
4511 | |
4512 | /// Internal representation of canonical, dependent |
4513 | /// decltype(expr) types. |
4514 | /// |
4515 | /// This class is used internally by the ASTContext to manage |
4516 | /// canonical, dependent types, only. Clients will only see instances |
4517 | /// of this class via DecltypeType nodes. |
4518 | class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { |
4519 | const ASTContext &Context; |
4520 | |
4521 | public: |
4522 | DependentDecltypeType(const ASTContext &Context, Expr *E); |
4523 | |
4524 | void Profile(llvm::FoldingSetNodeID &ID) { |
4525 | Profile(ID, Context, getUnderlyingExpr()); |
4526 | } |
4527 | |
4528 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4529 | Expr *E); |
4530 | }; |
4531 | |
4532 | /// A unary type transform, which is a type constructed from another. |
4533 | class UnaryTransformType : public Type { |
4534 | public: |
4535 | enum UTTKind { |
4536 | EnumUnderlyingType |
4537 | }; |
4538 | |
4539 | private: |
4540 | /// The untransformed type. |
4541 | QualType BaseType; |
4542 | |
4543 | /// The transformed type if not dependent, otherwise the same as BaseType. |
4544 | QualType UnderlyingType; |
4545 | |
4546 | UTTKind UKind; |
4547 | |
4548 | protected: |
4549 | friend class ASTContext; |
4550 | |
4551 | UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, |
4552 | QualType CanonicalTy); |
4553 | |
4554 | public: |
4555 | bool isSugared() const { return !isDependentType(); } |
4556 | QualType desugar() const { return UnderlyingType; } |
4557 | |
4558 | QualType getUnderlyingType() const { return UnderlyingType; } |
4559 | QualType getBaseType() const { return BaseType; } |
4560 | |
4561 | UTTKind getUTTKind() const { return UKind; } |
4562 | |
4563 | static bool classof(const Type *T) { |
4564 | return T->getTypeClass() == UnaryTransform; |
4565 | } |
4566 | }; |
4567 | |
4568 | /// Internal representation of canonical, dependent |
4569 | /// __underlying_type(type) types. |
4570 | /// |
4571 | /// This class is used internally by the ASTContext to manage |
4572 | /// canonical, dependent types, only. Clients will only see instances |
4573 | /// of this class via UnaryTransformType nodes. |
4574 | class DependentUnaryTransformType : public UnaryTransformType, |
4575 | public llvm::FoldingSetNode { |
4576 | public: |
4577 | DependentUnaryTransformType(const ASTContext &C, QualType BaseType, |
4578 | UTTKind UKind); |
4579 | |
4580 | void Profile(llvm::FoldingSetNodeID &ID) { |
4581 | Profile(ID, getBaseType(), getUTTKind()); |
4582 | } |
4583 | |
4584 | static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, |
4585 | UTTKind UKind) { |
4586 | ID.AddPointer(BaseType.getAsOpaquePtr()); |
4587 | ID.AddInteger((unsigned)UKind); |
4588 | } |
4589 | }; |
4590 | |
4591 | class TagType : public Type { |
4592 | friend class ASTReader; |
4593 | template <class T> friend class serialization::AbstractTypeReader; |
4594 | |
4595 | /// Stores the TagDecl associated with this type. The decl may point to any |
4596 | /// TagDecl that declares the entity. |
4597 | TagDecl *decl; |
4598 | |
4599 | protected: |
4600 | TagType(TypeClass TC, const TagDecl *D, QualType can); |
4601 | |
4602 | public: |
4603 | TagDecl *getDecl() const; |
4604 | |
4605 | /// Determines whether this type is in the process of being defined. |
4606 | bool isBeingDefined() const; |
4607 | |
4608 | static bool classof(const Type *T) { |
4609 | return T->getTypeClass() == Enum || T->getTypeClass() == Record; |
4610 | } |
4611 | }; |
4612 | |
4613 | /// A helper class that allows the use of isa/cast/dyncast |
4614 | /// to detect TagType objects of structs/unions/classes. |
4615 | class RecordType : public TagType { |
4616 | protected: |
4617 | friend class ASTContext; // ASTContext creates these. |
4618 | |
4619 | explicit RecordType(const RecordDecl *D) |
4620 | : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4621 | explicit RecordType(TypeClass TC, RecordDecl *D) |
4622 | : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4623 | |
4624 | public: |
4625 | RecordDecl *getDecl() const { |
4626 | return reinterpret_cast<RecordDecl*>(TagType::getDecl()); |
4627 | } |
4628 | |
4629 | /// Recursively check all fields in the record for const-ness. If any field |
4630 | /// is declared const, return true. Otherwise, return false. |
4631 | bool hasConstFields() const; |
4632 | |
4633 | bool isSugared() const { return false; } |
4634 | QualType desugar() const { return QualType(this, 0); } |
4635 | |
4636 | static bool classof(const Type *T) { return T->getTypeClass() == Record; } |
4637 | }; |
4638 | |
4639 | /// A helper class that allows the use of isa/cast/dyncast |
4640 | /// to detect TagType objects of enums. |
4641 | class EnumType : public TagType { |
4642 | friend class ASTContext; // ASTContext creates these. |
4643 | |
4644 | explicit EnumType(const EnumDecl *D) |
4645 | : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4646 | |
4647 | public: |
4648 | EnumDecl *getDecl() const { |
4649 | return reinterpret_cast<EnumDecl*>(TagType::getDecl()); |
4650 | } |
4651 | |
4652 | bool isSugared() const { return false; } |
4653 | QualType desugar() const { return QualType(this, 0); } |
4654 | |
4655 | static bool classof(const Type *T) { return T->getTypeClass() == Enum; } |
4656 | }; |
4657 | |
4658 | /// An attributed type is a type to which a type attribute has been applied. |
4659 | /// |
4660 | /// The "modified type" is the fully-sugared type to which the attributed |
4661 | /// type was applied; generally it is not canonically equivalent to the |
4662 | /// attributed type. The "equivalent type" is the minimally-desugared type |
4663 | /// which the type is canonically equivalent to. |
4664 | /// |
4665 | /// For example, in the following attributed type: |
4666 | /// int32_t __attribute__((vector_size(16))) |
4667 | /// - the modified type is the TypedefType for int32_t |
4668 | /// - the equivalent type is VectorType(16, int32_t) |
4669 | /// - the canonical type is VectorType(16, int) |
4670 | class AttributedType : public Type, public llvm::FoldingSetNode { |
4671 | public: |
4672 | using Kind = attr::Kind; |
4673 | |
4674 | private: |
4675 | friend class ASTContext; // ASTContext creates these |
4676 | |
4677 | QualType ModifiedType; |
4678 | QualType EquivalentType; |
4679 | |
4680 | AttributedType(QualType canon, attr::Kind attrKind, QualType modified, |
4681 | QualType equivalent) |
4682 | : Type(Attributed, canon, equivalent->getDependence()), |
4683 | ModifiedType(modified), EquivalentType(equivalent) { |
4684 | AttributedTypeBits.AttrKind = attrKind; |
4685 | } |
4686 | |
4687 | public: |
4688 | Kind getAttrKind() const { |
4689 | return static_cast<Kind>(AttributedTypeBits.AttrKind); |
4690 | } |
4691 | |
4692 | QualType getModifiedType() const { return ModifiedType; } |
4693 | QualType getEquivalentType() const { return EquivalentType; } |
4694 | |
4695 | bool isSugared() const { return true; } |
4696 | QualType desugar() const { return getEquivalentType(); } |
4697 | |
4698 | /// Does this attribute behave like a type qualifier? |
4699 | /// |
4700 | /// A type qualifier adjusts a type to provide specialized rules for |
4701 | /// a specific object, like the standard const and volatile qualifiers. |
4702 | /// This includes attributes controlling things like nullability, |
4703 | /// address spaces, and ARC ownership. The value of the object is still |
4704 | /// largely described by the modified type. |
4705 | /// |
4706 | /// In contrast, many type attributes "rewrite" their modified type to |
4707 | /// produce a fundamentally different type, not necessarily related in any |
4708 | /// formalizable way to the original type. For example, calling convention |
4709 | /// and vector attributes are not simple type qualifiers. |
4710 | /// |
4711 | /// Type qualifiers are often, but not always, reflected in the canonical |
4712 | /// type. |
4713 | bool isQualifier() const; |
4714 | |
4715 | bool isMSTypeSpec() const; |
4716 | |
4717 | bool isCallingConv() const; |
4718 | |
4719 | llvm::Optional<NullabilityKind> getImmediateNullability() const; |
4720 | |
4721 | /// Retrieve the attribute kind corresponding to the given |
4722 | /// nullability kind. |
4723 | static Kind getNullabilityAttrKind(NullabilityKind kind) { |
4724 | switch (kind) { |
4725 | case NullabilityKind::NonNull: |
4726 | return attr::TypeNonNull; |
4727 | |
4728 | case NullabilityKind::Nullable: |
4729 | return attr::TypeNullable; |
4730 | |
4731 | case NullabilityKind::NullableResult: |
4732 | return attr::TypeNullableResult; |
4733 | |
4734 | case NullabilityKind::Unspecified: |
4735 | return attr::TypeNullUnspecified; |
4736 | } |
4737 | llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind." , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 4737); |
4738 | } |
4739 | |
4740 | /// Strip off the top-level nullability annotation on the given |
4741 | /// type, if it's there. |
4742 | /// |
4743 | /// \param T The type to strip. If the type is exactly an |
4744 | /// AttributedType specifying nullability (without looking through |
4745 | /// type sugar), the nullability is returned and this type changed |
4746 | /// to the underlying modified type. |
4747 | /// |
4748 | /// \returns the top-level nullability, if present. |
4749 | static Optional<NullabilityKind> stripOuterNullability(QualType &T); |
4750 | |
4751 | void Profile(llvm::FoldingSetNodeID &ID) { |
4752 | Profile(ID, getAttrKind(), ModifiedType, EquivalentType); |
4753 | } |
4754 | |
4755 | static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, |
4756 | QualType modified, QualType equivalent) { |
4757 | ID.AddInteger(attrKind); |
4758 | ID.AddPointer(modified.getAsOpaquePtr()); |
4759 | ID.AddPointer(equivalent.getAsOpaquePtr()); |
4760 | } |
4761 | |
4762 | static bool classof(const Type *T) { |
4763 | return T->getTypeClass() == Attributed; |
4764 | } |
4765 | }; |
4766 | |
4767 | class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4768 | friend class ASTContext; // ASTContext creates these |
4769 | |
4770 | // Helper data collector for canonical types. |
4771 | struct CanonicalTTPTInfo { |
4772 | unsigned Depth : 15; |
4773 | unsigned ParameterPack : 1; |
4774 | unsigned Index : 16; |
4775 | }; |
4776 | |
4777 | union { |
4778 | // Info for the canonical type. |
4779 | CanonicalTTPTInfo CanTTPTInfo; |
4780 | |
4781 | // Info for the non-canonical type. |
4782 | TemplateTypeParmDecl *TTPDecl; |
4783 | }; |
4784 | |
4785 | /// Build a non-canonical type. |
4786 | TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) |
4787 | : Type(TemplateTypeParm, Canon, |
4788 | TypeDependence::DependentInstantiation | |
4789 | (Canon->getDependence() & TypeDependence::UnexpandedPack)), |
4790 | TTPDecl(TTPDecl) {} |
4791 | |
4792 | /// Build the canonical type. |
4793 | TemplateTypeParmType(unsigned D, unsigned I, bool PP) |
4794 | : Type(TemplateTypeParm, QualType(this, 0), |
4795 | TypeDependence::DependentInstantiation | |
4796 | (PP ? TypeDependence::UnexpandedPack : TypeDependence::None)) { |
4797 | CanTTPTInfo.Depth = D; |
4798 | CanTTPTInfo.Index = I; |
4799 | CanTTPTInfo.ParameterPack = PP; |
4800 | } |
4801 | |
4802 | const CanonicalTTPTInfo& getCanTTPTInfo() const { |
4803 | QualType Can = getCanonicalTypeInternal(); |
4804 | return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; |
4805 | } |
4806 | |
4807 | public: |
4808 | unsigned getDepth() const { return getCanTTPTInfo().Depth; } |
4809 | unsigned getIndex() const { return getCanTTPTInfo().Index; } |
4810 | bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } |
4811 | |
4812 | TemplateTypeParmDecl *getDecl() const { |
4813 | return isCanonicalUnqualified() ? nullptr : TTPDecl; |
4814 | } |
4815 | |
4816 | IdentifierInfo *getIdentifier() const; |
4817 | |
4818 | bool isSugared() const { return false; } |
4819 | QualType desugar() const { return QualType(this, 0); } |
4820 | |
4821 | void Profile(llvm::FoldingSetNodeID &ID) { |
4822 | Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); |
4823 | } |
4824 | |
4825 | static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, |
4826 | unsigned Index, bool ParameterPack, |
4827 | TemplateTypeParmDecl *TTPDecl) { |
4828 | ID.AddInteger(Depth); |
4829 | ID.AddInteger(Index); |
4830 | ID.AddBoolean(ParameterPack); |
4831 | ID.AddPointer(TTPDecl); |
4832 | } |
4833 | |
4834 | static bool classof(const Type *T) { |
4835 | return T->getTypeClass() == TemplateTypeParm; |
4836 | } |
4837 | }; |
4838 | |
4839 | /// Represents the result of substituting a type for a template |
4840 | /// type parameter. |
4841 | /// |
4842 | /// Within an instantiated template, all template type parameters have |
4843 | /// been replaced with these. They are used solely to record that a |
4844 | /// type was originally written as a template type parameter; |
4845 | /// therefore they are never canonical. |
4846 | class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4847 | friend class ASTContext; |
4848 | |
4849 | // The original type parameter. |
4850 | const TemplateTypeParmType *Replaced; |
4851 | |
4852 | SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) |
4853 | : Type(SubstTemplateTypeParm, Canon, Canon->getDependence()), |
4854 | Replaced(Param) {} |
4855 | |
4856 | public: |
4857 | /// Gets the template parameter that was substituted for. |
4858 | const TemplateTypeParmType *getReplacedParameter() const { |
4859 | return Replaced; |
4860 | } |
4861 | |
4862 | /// Gets the type that was substituted for the template |
4863 | /// parameter. |
4864 | QualType getReplacementType() const { |
4865 | return getCanonicalTypeInternal(); |
4866 | } |
4867 | |
4868 | bool isSugared() const { return true; } |
4869 | QualType desugar() const { return getReplacementType(); } |
4870 | |
4871 | void Profile(llvm::FoldingSetNodeID &ID) { |
4872 | Profile(ID, getReplacedParameter(), getReplacementType()); |
4873 | } |
4874 | |
4875 | static void Profile(llvm::FoldingSetNodeID &ID, |
4876 | const TemplateTypeParmType *Replaced, |
4877 | QualType Replacement) { |
4878 | ID.AddPointer(Replaced); |
4879 | ID.AddPointer(Replacement.getAsOpaquePtr()); |
4880 | } |
4881 | |
4882 | static bool classof(const Type *T) { |
4883 | return T->getTypeClass() == SubstTemplateTypeParm; |
4884 | } |
4885 | }; |
4886 | |
4887 | /// Represents the result of substituting a set of types for a template |
4888 | /// type parameter pack. |
4889 | /// |
4890 | /// When a pack expansion in the source code contains multiple parameter packs |
4891 | /// and those parameter packs correspond to different levels of template |
4892 | /// parameter lists, this type node is used to represent a template type |
4893 | /// parameter pack from an outer level, which has already had its argument pack |
4894 | /// substituted but that still lives within a pack expansion that itself |
4895 | /// could not be instantiated. When actually performing a substitution into |
4896 | /// that pack expansion (e.g., when all template parameters have corresponding |
4897 | /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType |
4898 | /// at the current pack substitution index. |
4899 | class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { |
4900 | friend class ASTContext; |
4901 | |
4902 | /// The original type parameter. |
4903 | const TemplateTypeParmType *Replaced; |
4904 | |
4905 | /// A pointer to the set of template arguments that this |
4906 | /// parameter pack is instantiated with. |
4907 | const TemplateArgument *Arguments; |
4908 | |
4909 | SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, |
4910 | QualType Canon, |
4911 | const TemplateArgument &ArgPack); |
4912 | |
4913 | public: |
4914 | IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } |
4915 | |
4916 | /// Gets the template parameter that was substituted for. |
4917 | const TemplateTypeParmType *getReplacedParameter() const { |
4918 | return Replaced; |
4919 | } |
4920 | |
4921 | unsigned getNumArgs() const { |
4922 | return SubstTemplateTypeParmPackTypeBits.NumArgs; |
4923 | } |
4924 | |
4925 | bool isSugared() const { return false; } |
4926 | QualType desugar() const { return QualType(this, 0); } |
4927 | |
4928 | TemplateArgument getArgumentPack() const; |
4929 | |
4930 | void Profile(llvm::FoldingSetNodeID &ID); |
4931 | static void Profile(llvm::FoldingSetNodeID &ID, |
4932 | const TemplateTypeParmType *Replaced, |
4933 | const TemplateArgument &ArgPack); |
4934 | |
4935 | static bool classof(const Type *T) { |
4936 | return T->getTypeClass() == SubstTemplateTypeParmPack; |
4937 | } |
4938 | }; |
4939 | |
4940 | /// Common base class for placeholders for types that get replaced by |
4941 | /// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced |
4942 | /// class template types, and constrained type names. |
4943 | /// |
4944 | /// These types are usually a placeholder for a deduced type. However, before |
4945 | /// the initializer is attached, or (usually) if the initializer is |
4946 | /// type-dependent, there is no deduced type and the type is canonical. In |
4947 | /// the latter case, it is also a dependent type. |
4948 | class DeducedType : public Type { |
4949 | protected: |
4950 | DeducedType(TypeClass TC, QualType DeducedAsType, |
4951 | TypeDependence ExtraDependence) |
4952 | : Type(TC, |
4953 | // FIXME: Retain the sugared deduced type? |
4954 | DeducedAsType.isNull() ? QualType(this, 0) |
4955 | : DeducedAsType.getCanonicalType(), |
4956 | ExtraDependence | (DeducedAsType.isNull() |
4957 | ? TypeDependence::None |
4958 | : DeducedAsType->getDependence() & |
4959 | ~TypeDependence::VariablyModified)) {} |
4960 | |
4961 | public: |
4962 | bool isSugared() const { return !isCanonicalUnqualified(); } |
4963 | QualType desugar() const { return getCanonicalTypeInternal(); } |
4964 | |
4965 | /// Get the type deduced for this placeholder type, or null if it's |
4966 | /// either not been deduced or was deduced to a dependent type. |
4967 | QualType getDeducedType() const { |
4968 | return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType(); |
4969 | } |
4970 | bool isDeduced() const { |
4971 | return !isCanonicalUnqualified() || isDependentType(); |
4972 | } |
4973 | |
4974 | static bool classof(const Type *T) { |
4975 | return T->getTypeClass() == Auto || |
4976 | T->getTypeClass() == DeducedTemplateSpecialization; |
4977 | } |
4978 | }; |
4979 | |
4980 | /// Represents a C++11 auto or C++14 decltype(auto) type, possibly constrained |
4981 | /// by a type-constraint. |
4982 | class alignas(8) AutoType : public DeducedType, public llvm::FoldingSetNode { |
4983 | friend class ASTContext; // ASTContext creates these |
4984 | |
4985 | ConceptDecl *TypeConstraintConcept; |
4986 | |
4987 | AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword, |
4988 | TypeDependence ExtraDependence, ConceptDecl *CD, |
4989 | ArrayRef<TemplateArgument> TypeConstraintArgs); |
4990 | |
4991 | const TemplateArgument *getArgBuffer() const { |
4992 | return reinterpret_cast<const TemplateArgument*>(this+1); |
4993 | } |
4994 | |
4995 | TemplateArgument *getArgBuffer() { |
4996 | return reinterpret_cast<TemplateArgument*>(this+1); |
4997 | } |
4998 | |
4999 | public: |
5000 | /// Retrieve the template arguments. |
5001 | const TemplateArgument *getArgs() const { |
5002 | return getArgBuffer(); |
5003 | } |
5004 | |
5005 | /// Retrieve the number of template arguments. |
5006 | unsigned getNumArgs() const { |
5007 | return AutoTypeBits.NumArgs; |
5008 | } |
5009 | |
5010 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5011 | |
5012 | ArrayRef<TemplateArgument> getTypeConstraintArguments() const { |
5013 | return {getArgs(), getNumArgs()}; |
5014 | } |
5015 | |
5016 | ConceptDecl *getTypeConstraintConcept() const { |
5017 | return TypeConstraintConcept; |
5018 | } |
5019 | |
5020 | bool isConstrained() const { |
5021 | return TypeConstraintConcept != nullptr; |
5022 | } |
5023 | |
5024 | bool isDecltypeAuto() const { |
5025 | return getKeyword() == AutoTypeKeyword::DecltypeAuto; |
5026 | } |
5027 | |
5028 | AutoTypeKeyword getKeyword() const { |
5029 | return (AutoTypeKeyword)AutoTypeBits.Keyword; |
5030 | } |
5031 | |
5032 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5033 | Profile(ID, Context, getDeducedType(), getKeyword(), isDependentType(), |
5034 | getTypeConstraintConcept(), getTypeConstraintArguments()); |
5035 | } |
5036 | |
5037 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
5038 | QualType Deduced, AutoTypeKeyword Keyword, |
5039 | bool IsDependent, ConceptDecl *CD, |
5040 | ArrayRef<TemplateArgument> Arguments); |
5041 | |
5042 | static bool classof(const Type *T) { |
5043 | return T->getTypeClass() == Auto; |
5044 | } |
5045 | }; |
5046 | |
5047 | /// Represents a C++17 deduced template specialization type. |
5048 | class DeducedTemplateSpecializationType : public DeducedType, |
5049 | public llvm::FoldingSetNode { |
5050 | friend class ASTContext; // ASTContext creates these |
5051 | |
5052 | /// The name of the template whose arguments will be deduced. |
5053 | TemplateName Template; |
5054 | |
5055 | DeducedTemplateSpecializationType(TemplateName Template, |
5056 | QualType DeducedAsType, |
5057 | bool IsDeducedAsDependent) |
5058 | : DeducedType(DeducedTemplateSpecialization, DeducedAsType, |
5059 | toTypeDependence(Template.getDependence()) | |
5060 | (IsDeducedAsDependent |
5061 | ? TypeDependence::DependentInstantiation |
5062 | : TypeDependence::None)), |
5063 | Template(Template) {} |
5064 | |
5065 | public: |
5066 | /// Retrieve the name of the template that we are deducing. |
5067 | TemplateName getTemplateName() const { return Template;} |
5068 | |
5069 | void Profile(llvm::FoldingSetNodeID &ID) { |
5070 | Profile(ID, getTemplateName(), getDeducedType(), isDependentType()); |
5071 | } |
5072 | |
5073 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template, |
5074 | QualType Deduced, bool IsDependent) { |
5075 | Template.Profile(ID); |
5076 | ID.AddPointer(Deduced.getAsOpaquePtr()); |
5077 | ID.AddBoolean(IsDependent); |
5078 | } |
5079 | |
5080 | static bool classof(const Type *T) { |
5081 | return T->getTypeClass() == DeducedTemplateSpecialization; |
5082 | } |
5083 | }; |
5084 | |
5085 | /// Represents a type template specialization; the template |
5086 | /// must be a class template, a type alias template, or a template |
5087 | /// template parameter. A template which cannot be resolved to one of |
5088 | /// these, e.g. because it is written with a dependent scope |
5089 | /// specifier, is instead represented as a |
5090 | /// @c DependentTemplateSpecializationType. |
5091 | /// |
5092 | /// A non-dependent template specialization type is always "sugar", |
5093 | /// typically for a \c RecordType. For example, a class template |
5094 | /// specialization type of \c vector<int> will refer to a tag type for |
5095 | /// the instantiation \c std::vector<int, std::allocator<int>> |
5096 | /// |
5097 | /// Template specializations are dependent if either the template or |
5098 | /// any of the template arguments are dependent, in which case the |
5099 | /// type may also be canonical. |
5100 | /// |
5101 | /// Instances of this type are allocated with a trailing array of |
5102 | /// TemplateArguments, followed by a QualType representing the |
5103 | /// non-canonical aliased type when the template is a type alias |
5104 | /// template. |
5105 | class alignas(8) TemplateSpecializationType |
5106 | : public Type, |
5107 | public llvm::FoldingSetNode { |
5108 | friend class ASTContext; // ASTContext creates these |
5109 | |
5110 | /// The name of the template being specialized. This is |
5111 | /// either a TemplateName::Template (in which case it is a |
5112 | /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a |
5113 | /// TypeAliasTemplateDecl*), a |
5114 | /// TemplateName::SubstTemplateTemplateParmPack, or a |
5115 | /// TemplateName::SubstTemplateTemplateParm (in which case the |
5116 | /// replacement must, recursively, be one of these). |
5117 | TemplateName Template; |
5118 | |
5119 | TemplateSpecializationType(TemplateName T, |
5120 | ArrayRef<TemplateArgument> Args, |
5121 | QualType Canon, |
5122 | QualType Aliased); |
5123 | |
5124 | public: |
5125 | /// Determine whether any of the given template arguments are dependent. |
5126 | /// |
5127 | /// The converted arguments should be supplied when known; whether an |
5128 | /// argument is dependent can depend on the conversions performed on it |
5129 | /// (for example, a 'const int' passed as a template argument might be |
5130 | /// dependent if the parameter is a reference but non-dependent if the |
5131 | /// parameter is an int). |
5132 | /// |
5133 | /// Note that the \p Args parameter is unused: this is intentional, to remind |
5134 | /// the caller that they need to pass in the converted arguments, not the |
5135 | /// specified arguments. |
5136 | static bool |
5137 | anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args, |
5138 | ArrayRef<TemplateArgument> Converted); |
5139 | static bool |
5140 | anyDependentTemplateArguments(const TemplateArgumentListInfo &, |
5141 | ArrayRef<TemplateArgument> Converted); |
5142 | static bool anyInstantiationDependentTemplateArguments( |
5143 | ArrayRef<TemplateArgumentLoc> Args); |
5144 | |
5145 | /// True if this template specialization type matches a current |
5146 | /// instantiation in the context in which it is found. |
5147 | bool isCurrentInstantiation() const { |
5148 | return isa<InjectedClassNameType>(getCanonicalTypeInternal()); |
5149 | } |
5150 | |
5151 | /// Determine if this template specialization type is for a type alias |
5152 | /// template that has been substituted. |
5153 | /// |
5154 | /// Nearly every template specialization type whose template is an alias |
5155 | /// template will be substituted. However, this is not the case when |
5156 | /// the specialization contains a pack expansion but the template alias |
5157 | /// does not have a corresponding parameter pack, e.g., |
5158 | /// |
5159 | /// \code |
5160 | /// template<typename T, typename U, typename V> struct S; |
5161 | /// template<typename T, typename U> using A = S<T, int, U>; |
5162 | /// template<typename... Ts> struct X { |
5163 | /// typedef A<Ts...> type; // not a type alias |
5164 | /// }; |
5165 | /// \endcode |
5166 | bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; } |
5167 | |
5168 | /// Get the aliased type, if this is a specialization of a type alias |
5169 | /// template. |
5170 | QualType getAliasedType() const { |
5171 | assert(isTypeAlias() && "not a type alias template specialization")(static_cast <bool> (isTypeAlias() && "not a type alias template specialization" ) ? void (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5171, __extension__ __PRETTY_FUNCTION__)); |
5172 | return *reinterpret_cast<const QualType*>(end()); |
5173 | } |
5174 | |
5175 | using iterator = const TemplateArgument *; |
5176 | |
5177 | iterator begin() const { return getArgs(); } |
5178 | iterator end() const; // defined inline in TemplateBase.h |
5179 | |
5180 | /// Retrieve the name of the template that we are specializing. |
5181 | TemplateName getTemplateName() const { return Template; } |
5182 | |
5183 | /// Retrieve the template arguments. |
5184 | const TemplateArgument *getArgs() const { |
5185 | return reinterpret_cast<const TemplateArgument *>(this + 1); |
5186 | } |
5187 | |
5188 | /// Retrieve the number of template arguments. |
5189 | unsigned getNumArgs() const { |
5190 | return TemplateSpecializationTypeBits.NumArgs; |
5191 | } |
5192 | |
5193 | /// Retrieve a specific template argument as a type. |
5194 | /// \pre \c isArgType(Arg) |
5195 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5196 | |
5197 | ArrayRef<TemplateArgument> template_arguments() const { |
5198 | return {getArgs(), getNumArgs()}; |
5199 | } |
5200 | |
5201 | bool isSugared() const { |
5202 | return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); |
5203 | } |
5204 | |
5205 | QualType desugar() const { |
5206 | return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal(); |
5207 | } |
5208 | |
5209 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
5210 | Profile(ID, Template, template_arguments(), Ctx); |
5211 | if (isTypeAlias()) |
5212 | getAliasedType().Profile(ID); |
5213 | } |
5214 | |
5215 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, |
5216 | ArrayRef<TemplateArgument> Args, |
5217 | const ASTContext &Context); |
5218 | |
5219 | static bool classof(const Type *T) { |
5220 | return T->getTypeClass() == TemplateSpecialization; |
5221 | } |
5222 | }; |
5223 | |
5224 | /// Print a template argument list, including the '<' and '>' |
5225 | /// enclosing the template arguments. |
5226 | void printTemplateArgumentList(raw_ostream &OS, |
5227 | ArrayRef<TemplateArgument> Args, |
5228 | const PrintingPolicy &Policy, |
5229 | const TemplateParameterList *TPL = nullptr); |
5230 | |
5231 | void printTemplateArgumentList(raw_ostream &OS, |
5232 | ArrayRef<TemplateArgumentLoc> Args, |
5233 | const PrintingPolicy &Policy, |
5234 | const TemplateParameterList *TPL = nullptr); |
5235 | |
5236 | void printTemplateArgumentList(raw_ostream &OS, |
5237 | const TemplateArgumentListInfo &Args, |
5238 | const PrintingPolicy &Policy, |
5239 | const TemplateParameterList *TPL = nullptr); |
5240 | |
5241 | /// The injected class name of a C++ class template or class |
5242 | /// template partial specialization. Used to record that a type was |
5243 | /// spelled with a bare identifier rather than as a template-id; the |
5244 | /// equivalent for non-templated classes is just RecordType. |
5245 | /// |
5246 | /// Injected class name types are always dependent. Template |
5247 | /// instantiation turns these into RecordTypes. |
5248 | /// |
5249 | /// Injected class name types are always canonical. This works |
5250 | /// because it is impossible to compare an injected class name type |
5251 | /// with the corresponding non-injected template type, for the same |
5252 | /// reason that it is impossible to directly compare template |
5253 | /// parameters from different dependent contexts: injected class name |
5254 | /// types can only occur within the scope of a particular templated |
5255 | /// declaration, and within that scope every template specialization |
5256 | /// will canonicalize to the injected class name (when appropriate |
5257 | /// according to the rules of the language). |
5258 | class InjectedClassNameType : public Type { |
5259 | friend class ASTContext; // ASTContext creates these. |
5260 | friend class ASTNodeImporter; |
5261 | friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not |
5262 | // currently suitable for AST reading, too much |
5263 | // interdependencies. |
5264 | template <class T> friend class serialization::AbstractTypeReader; |
5265 | |
5266 | CXXRecordDecl *Decl; |
5267 | |
5268 | /// The template specialization which this type represents. |
5269 | /// For example, in |
5270 | /// template <class T> class A { ... }; |
5271 | /// this is A<T>, whereas in |
5272 | /// template <class X, class Y> class A<B<X,Y> > { ... }; |
5273 | /// this is A<B<X,Y> >. |
5274 | /// |
5275 | /// It is always unqualified, always a template specialization type, |
5276 | /// and always dependent. |
5277 | QualType InjectedType; |
5278 | |
5279 | InjectedClassNameType(CXXRecordDecl *D, QualType TST) |
5280 | : Type(InjectedClassName, QualType(), |
5281 | TypeDependence::DependentInstantiation), |
5282 | Decl(D), InjectedType(TST) { |
5283 | assert(isa<TemplateSpecializationType>(TST))(static_cast <bool> (isa<TemplateSpecializationType> (TST)) ? void (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5283, __extension__ __PRETTY_FUNCTION__)); |
5284 | assert(!TST.hasQualifiers())(static_cast <bool> (!TST.hasQualifiers()) ? void (0) : __assert_fail ("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5284, __extension__ __PRETTY_FUNCTION__)); |
5285 | assert(TST->isDependentType())(static_cast <bool> (TST->isDependentType()) ? void ( 0) : __assert_fail ("TST->isDependentType()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5285, __extension__ __PRETTY_FUNCTION__)); |
5286 | } |
5287 | |
5288 | public: |
5289 | QualType getInjectedSpecializationType() const { return InjectedType; } |
5290 | |
5291 | const TemplateSpecializationType *getInjectedTST() const { |
5292 | return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); |
5293 | } |
5294 | |
5295 | TemplateName getTemplateName() const { |
5296 | return getInjectedTST()->getTemplateName(); |
5297 | } |
5298 | |
5299 | CXXRecordDecl *getDecl() const; |
5300 | |
5301 | bool isSugared() const { return false; } |
5302 | QualType desugar() const { return QualType(this, 0); } |
5303 | |
5304 | static bool classof(const Type *T) { |
5305 | return T->getTypeClass() == InjectedClassName; |
5306 | } |
5307 | }; |
5308 | |
5309 | /// The kind of a tag type. |
5310 | enum TagTypeKind { |
5311 | /// The "struct" keyword. |
5312 | TTK_Struct, |
5313 | |
5314 | /// The "__interface" keyword. |
5315 | TTK_Interface, |
5316 | |
5317 | /// The "union" keyword. |
5318 | TTK_Union, |
5319 | |
5320 | /// The "class" keyword. |
5321 | TTK_Class, |
5322 | |
5323 | /// The "enum" keyword. |
5324 | TTK_Enum |
5325 | }; |
5326 | |
5327 | /// The elaboration keyword that precedes a qualified type name or |
5328 | /// introduces an elaborated-type-specifier. |
5329 | enum ElaboratedTypeKeyword { |
5330 | /// The "struct" keyword introduces the elaborated-type-specifier. |
5331 | ETK_Struct, |
5332 | |
5333 | /// The "__interface" keyword introduces the elaborated-type-specifier. |
5334 | ETK_Interface, |
5335 | |
5336 | /// The "union" keyword introduces the elaborated-type-specifier. |
5337 | ETK_Union, |
5338 | |
5339 | /// The "class" keyword introduces the elaborated-type-specifier. |
5340 | ETK_Class, |
5341 | |
5342 | /// The "enum" keyword introduces the elaborated-type-specifier. |
5343 | ETK_Enum, |
5344 | |
5345 | /// The "typename" keyword precedes the qualified type name, e.g., |
5346 | /// \c typename T::type. |
5347 | ETK_Typename, |
5348 | |
5349 | /// No keyword precedes the qualified type name. |
5350 | ETK_None |
5351 | }; |
5352 | |
5353 | /// A helper class for Type nodes having an ElaboratedTypeKeyword. |
5354 | /// The keyword in stored in the free bits of the base class. |
5355 | /// Also provides a few static helpers for converting and printing |
5356 | /// elaborated type keyword and tag type kind enumerations. |
5357 | class TypeWithKeyword : public Type { |
5358 | protected: |
5359 | TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, |
5360 | QualType Canonical, TypeDependence Dependence) |
5361 | : Type(tc, Canonical, Dependence) { |
5362 | TypeWithKeywordBits.Keyword = Keyword; |
5363 | } |
5364 | |
5365 | public: |
5366 | ElaboratedTypeKeyword getKeyword() const { |
5367 | return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); |
5368 | } |
5369 | |
5370 | /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword. |
5371 | static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); |
5372 | |
5373 | /// Converts a type specifier (DeclSpec::TST) into a tag type kind. |
5374 | /// It is an error to provide a type specifier which *isn't* a tag kind here. |
5375 | static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); |
5376 | |
5377 | /// Converts a TagTypeKind into an elaborated type keyword. |
5378 | static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); |
5379 | |
5380 | /// Converts an elaborated type keyword into a TagTypeKind. |
5381 | /// It is an error to provide an elaborated type keyword |
5382 | /// which *isn't* a tag kind here. |
5383 | static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); |
5384 | |
5385 | static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); |
5386 | |
5387 | static StringRef getKeywordName(ElaboratedTypeKeyword Keyword); |
5388 | |
5389 | static StringRef getTagTypeKindName(TagTypeKind Kind) { |
5390 | return getKeywordName(getKeywordForTagTypeKind(Kind)); |
5391 | } |
5392 | |
5393 | class CannotCastToThisType {}; |
5394 | static CannotCastToThisType classof(const Type *); |
5395 | }; |
5396 | |
5397 | /// Represents a type that was referred to using an elaborated type |
5398 | /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, |
5399 | /// or both. |
5400 | /// |
5401 | /// This type is used to keep track of a type name as written in the |
5402 | /// source code, including tag keywords and any nested-name-specifiers. |
5403 | /// The type itself is always "sugar", used to express what was written |
5404 | /// in the source code but containing no additional semantic information. |
5405 | class ElaboratedType final |
5406 | : public TypeWithKeyword, |
5407 | public llvm::FoldingSetNode, |
5408 | private llvm::TrailingObjects<ElaboratedType, TagDecl *> { |
5409 | friend class ASTContext; // ASTContext creates these |
5410 | friend TrailingObjects; |
5411 | |
5412 | /// The nested name specifier containing the qualifier. |
5413 | NestedNameSpecifier *NNS; |
5414 | |
5415 | /// The type that this qualified name refers to. |
5416 | QualType NamedType; |
5417 | |
5418 | /// The (re)declaration of this tag type owned by this occurrence is stored |
5419 | /// as a trailing object if there is one. Use getOwnedTagDecl to obtain |
5420 | /// it, or obtain a null pointer if there is none. |
5421 | |
5422 | ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5423 | QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl) |
5424 | : TypeWithKeyword(Keyword, Elaborated, CanonType, |
5425 | // Any semantic dependence on the qualifier will have |
5426 | // been incorporated into NamedType. We still need to |
5427 | // track syntactic (instantiation / error / pack) |
5428 | // dependence on the qualifier. |
5429 | NamedType->getDependence() | |
5430 | (NNS ? toSyntacticDependence( |
5431 | toTypeDependence(NNS->getDependence())) |
5432 | : TypeDependence::None)), |
5433 | NNS(NNS), NamedType(NamedType) { |
5434 | ElaboratedTypeBits.HasOwnedTagDecl = false; |
5435 | if (OwnedTagDecl) { |
5436 | ElaboratedTypeBits.HasOwnedTagDecl = true; |
5437 | *getTrailingObjects<TagDecl *>() = OwnedTagDecl; |
5438 | } |
5439 | assert(!(Keyword == ETK_None && NNS == nullptr) &&(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5441, __extension__ __PRETTY_FUNCTION__)) |
5440 | "ElaboratedType cannot have elaborated type keyword "(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5441, __extension__ __PRETTY_FUNCTION__)) |
5441 | "and name qualifier both null.")(static_cast <bool> (!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null.") ? void (0) : __assert_fail ( "!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5441, __extension__ __PRETTY_FUNCTION__)); |
5442 | } |
5443 | |
5444 | public: |
5445 | /// Retrieve the qualification on this type. |
5446 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5447 | |
5448 | /// Retrieve the type named by the qualified-id. |
5449 | QualType getNamedType() const { return NamedType; } |
5450 | |
5451 | /// Remove a single level of sugar. |
5452 | QualType desugar() const { return getNamedType(); } |
5453 | |
5454 | /// Returns whether this type directly provides sugar. |
5455 | bool isSugared() const { return true; } |
5456 | |
5457 | /// Return the (re)declaration of this type owned by this occurrence of this |
5458 | /// type, or nullptr if there is none. |
5459 | TagDecl *getOwnedTagDecl() const { |
5460 | return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>() |
5461 | : nullptr; |
5462 | } |
5463 | |
5464 | void Profile(llvm::FoldingSetNodeID &ID) { |
5465 | Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl()); |
5466 | } |
5467 | |
5468 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5469 | NestedNameSpecifier *NNS, QualType NamedType, |
5470 | TagDecl *OwnedTagDecl) { |
5471 | ID.AddInteger(Keyword); |
5472 | ID.AddPointer(NNS); |
5473 | NamedType.Profile(ID); |
5474 | ID.AddPointer(OwnedTagDecl); |
5475 | } |
5476 | |
5477 | static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } |
5478 | }; |
5479 | |
5480 | /// Represents a qualified type name for which the type name is |
5481 | /// dependent. |
5482 | /// |
5483 | /// DependentNameType represents a class of dependent types that involve a |
5484 | /// possibly dependent nested-name-specifier (e.g., "T::") followed by a |
5485 | /// name of a type. The DependentNameType may start with a "typename" (for a |
5486 | /// typename-specifier), "class", "struct", "union", or "enum" (for a |
5487 | /// dependent elaborated-type-specifier), or nothing (in contexts where we |
5488 | /// know that we must be referring to a type, e.g., in a base class specifier). |
5489 | /// Typically the nested-name-specifier is dependent, but in MSVC compatibility |
5490 | /// mode, this type is used with non-dependent names to delay name lookup until |
5491 | /// instantiation. |
5492 | class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { |
5493 | friend class ASTContext; // ASTContext creates these |
5494 | |
5495 | /// The nested name specifier containing the qualifier. |
5496 | NestedNameSpecifier *NNS; |
5497 | |
5498 | /// The type that this typename specifier refers to. |
5499 | const IdentifierInfo *Name; |
5500 | |
5501 | DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5502 | const IdentifierInfo *Name, QualType CanonType) |
5503 | : TypeWithKeyword(Keyword, DependentName, CanonType, |
5504 | TypeDependence::DependentInstantiation | |
5505 | toTypeDependence(NNS->getDependence())), |
5506 | NNS(NNS), Name(Name) {} |
5507 | |
5508 | public: |
5509 | /// Retrieve the qualification on this type. |
5510 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5511 | |
5512 | /// Retrieve the type named by the typename specifier as an identifier. |
5513 | /// |
5514 | /// This routine will return a non-NULL identifier pointer when the |
5515 | /// form of the original typename was terminated by an identifier, |
5516 | /// e.g., "typename T::type". |
5517 | const IdentifierInfo *getIdentifier() const { |
5518 | return Name; |
5519 | } |
5520 | |
5521 | bool isSugared() const { return false; } |
5522 | QualType desugar() const { return QualType(this, 0); } |
5523 | |
5524 | void Profile(llvm::FoldingSetNodeID &ID) { |
5525 | Profile(ID, getKeyword(), NNS, Name); |
5526 | } |
5527 | |
5528 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5529 | NestedNameSpecifier *NNS, const IdentifierInfo *Name) { |
5530 | ID.AddInteger(Keyword); |
5531 | ID.AddPointer(NNS); |
5532 | ID.AddPointer(Name); |
5533 | } |
5534 | |
5535 | static bool classof(const Type *T) { |
5536 | return T->getTypeClass() == DependentName; |
5537 | } |
5538 | }; |
5539 | |
5540 | /// Represents a template specialization type whose template cannot be |
5541 | /// resolved, e.g. |
5542 | /// A<T>::template B<T> |
5543 | class alignas(8) DependentTemplateSpecializationType |
5544 | : public TypeWithKeyword, |
5545 | public llvm::FoldingSetNode { |
5546 | friend class ASTContext; // ASTContext creates these |
5547 | |
5548 | /// The nested name specifier containing the qualifier. |
5549 | NestedNameSpecifier *NNS; |
5550 | |
5551 | /// The identifier of the template. |
5552 | const IdentifierInfo *Name; |
5553 | |
5554 | DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, |
5555 | NestedNameSpecifier *NNS, |
5556 | const IdentifierInfo *Name, |
5557 | ArrayRef<TemplateArgument> Args, |
5558 | QualType Canon); |
5559 | |
5560 | const TemplateArgument *getArgBuffer() const { |
5561 | return reinterpret_cast<const TemplateArgument*>(this+1); |
5562 | } |
5563 | |
5564 | TemplateArgument *getArgBuffer() { |
5565 | return reinterpret_cast<TemplateArgument*>(this+1); |
5566 | } |
5567 | |
5568 | public: |
5569 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5570 | const IdentifierInfo *getIdentifier() const { return Name; } |
5571 | |
5572 | /// Retrieve the template arguments. |
5573 | const TemplateArgument *getArgs() const { |
5574 | return getArgBuffer(); |
5575 | } |
5576 | |
5577 | /// Retrieve the number of template arguments. |
5578 | unsigned getNumArgs() const { |
5579 | return DependentTemplateSpecializationTypeBits.NumArgs; |
5580 | } |
5581 | |
5582 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5583 | |
5584 | ArrayRef<TemplateArgument> template_arguments() const { |
5585 | return {getArgs(), getNumArgs()}; |
5586 | } |
5587 | |
5588 | using iterator = const TemplateArgument *; |
5589 | |
5590 | iterator begin() const { return getArgs(); } |
5591 | iterator end() const; // inline in TemplateBase.h |
5592 | |
5593 | bool isSugared() const { return false; } |
5594 | QualType desugar() const { return QualType(this, 0); } |
5595 | |
5596 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5597 | Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()}); |
5598 | } |
5599 | |
5600 | static void Profile(llvm::FoldingSetNodeID &ID, |
5601 | const ASTContext &Context, |
5602 | ElaboratedTypeKeyword Keyword, |
5603 | NestedNameSpecifier *Qualifier, |
5604 | const IdentifierInfo *Name, |
5605 | ArrayRef<TemplateArgument> Args); |
5606 | |
5607 | static bool classof(const Type *T) { |
5608 | return T->getTypeClass() == DependentTemplateSpecialization; |
5609 | } |
5610 | }; |
5611 | |
5612 | /// Represents a pack expansion of types. |
5613 | /// |
5614 | /// Pack expansions are part of C++11 variadic templates. A pack |
5615 | /// expansion contains a pattern, which itself contains one or more |
5616 | /// "unexpanded" parameter packs. When instantiated, a pack expansion |
5617 | /// produces a series of types, each instantiated from the pattern of |
5618 | /// the expansion, where the Ith instantiation of the pattern uses the |
5619 | /// Ith arguments bound to each of the unexpanded parameter packs. The |
5620 | /// pack expansion is considered to "expand" these unexpanded |
5621 | /// parameter packs. |
5622 | /// |
5623 | /// \code |
5624 | /// template<typename ...Types> struct tuple; |
5625 | /// |
5626 | /// template<typename ...Types> |
5627 | /// struct tuple_of_references { |
5628 | /// typedef tuple<Types&...> type; |
5629 | /// }; |
5630 | /// \endcode |
5631 | /// |
5632 | /// Here, the pack expansion \c Types&... is represented via a |
5633 | /// PackExpansionType whose pattern is Types&. |
5634 | class PackExpansionType : public Type, public llvm::FoldingSetNode { |
5635 | friend class ASTContext; // ASTContext creates these |
5636 | |
5637 | /// The pattern of the pack expansion. |
5638 | QualType Pattern; |
5639 | |
5640 | PackExpansionType(QualType Pattern, QualType Canon, |
5641 | Optional<unsigned> NumExpansions) |
5642 | : Type(PackExpansion, Canon, |
5643 | (Pattern->getDependence() | TypeDependence::Dependent | |
5644 | TypeDependence::Instantiation) & |
5645 | ~TypeDependence::UnexpandedPack), |
5646 | Pattern(Pattern) { |
5647 | PackExpansionTypeBits.NumExpansions = |
5648 | NumExpansions ? *NumExpansions + 1 : 0; |
5649 | } |
5650 | |
5651 | public: |
5652 | /// Retrieve the pattern of this pack expansion, which is the |
5653 | /// type that will be repeatedly instantiated when instantiating the |
5654 | /// pack expansion itself. |
5655 | QualType getPattern() const { return Pattern; } |
5656 | |
5657 | /// Retrieve the number of expansions that this pack expansion will |
5658 | /// generate, if known. |
5659 | Optional<unsigned> getNumExpansions() const { |
5660 | if (PackExpansionTypeBits.NumExpansions) |
5661 | return PackExpansionTypeBits.NumExpansions - 1; |
5662 | return None; |
5663 | } |
5664 | |
5665 | bool isSugared() const { return false; } |
5666 | QualType desugar() const { return QualType(this, 0); } |
5667 | |
5668 | void Profile(llvm::FoldingSetNodeID &ID) { |
5669 | Profile(ID, getPattern(), getNumExpansions()); |
5670 | } |
5671 | |
5672 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, |
5673 | Optional<unsigned> NumExpansions) { |
5674 | ID.AddPointer(Pattern.getAsOpaquePtr()); |
5675 | ID.AddBoolean(NumExpansions.hasValue()); |
5676 | if (NumExpansions) |
5677 | ID.AddInteger(*NumExpansions); |
5678 | } |
5679 | |
5680 | static bool classof(const Type *T) { |
5681 | return T->getTypeClass() == PackExpansion; |
5682 | } |
5683 | }; |
5684 | |
5685 | /// This class wraps the list of protocol qualifiers. For types that can |
5686 | /// take ObjC protocol qualifers, they can subclass this class. |
5687 | template <class T> |
5688 | class ObjCProtocolQualifiers { |
5689 | protected: |
5690 | ObjCProtocolQualifiers() = default; |
5691 | |
5692 | ObjCProtocolDecl * const *getProtocolStorage() const { |
5693 | return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage(); |
5694 | } |
5695 | |
5696 | ObjCProtocolDecl **getProtocolStorage() { |
5697 | return static_cast<T*>(this)->getProtocolStorageImpl(); |
5698 | } |
5699 | |
5700 | void setNumProtocols(unsigned N) { |
5701 | static_cast<T*>(this)->setNumProtocolsImpl(N); |
5702 | } |
5703 | |
5704 | void initialize(ArrayRef<ObjCProtocolDecl *> protocols) { |
5705 | setNumProtocols(protocols.size()); |
5706 | assert(getNumProtocols() == protocols.size() &&(static_cast <bool> (getNumProtocols() == protocols.size () && "bitfield overflow in protocol count") ? void ( 0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5707, __extension__ __PRETTY_FUNCTION__)) |
5707 | "bitfield overflow in protocol count")(static_cast <bool> (getNumProtocols() == protocols.size () && "bitfield overflow in protocol count") ? void ( 0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5707, __extension__ __PRETTY_FUNCTION__)); |
5708 | if (!protocols.empty()) |
5709 | memcpy(getProtocolStorage(), protocols.data(), |
5710 | protocols.size() * sizeof(ObjCProtocolDecl*)); |
5711 | } |
5712 | |
5713 | public: |
5714 | using qual_iterator = ObjCProtocolDecl * const *; |
5715 | using qual_range = llvm::iterator_range<qual_iterator>; |
5716 | |
5717 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
5718 | qual_iterator qual_begin() const { return getProtocolStorage(); } |
5719 | qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } |
5720 | |
5721 | bool qual_empty() const { return getNumProtocols() == 0; } |
5722 | |
5723 | /// Return the number of qualifying protocols in this type, or 0 if |
5724 | /// there are none. |
5725 | unsigned getNumProtocols() const { |
5726 | return static_cast<const T*>(this)->getNumProtocolsImpl(); |
5727 | } |
5728 | |
5729 | /// Fetch a protocol by index. |
5730 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
5731 | assert(I < getNumProtocols() && "Out-of-range protocol access")(static_cast <bool> (I < getNumProtocols() && "Out-of-range protocol access") ? void (0) : __assert_fail ( "I < getNumProtocols() && \"Out-of-range protocol access\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5731, __extension__ __PRETTY_FUNCTION__)); |
5732 | return qual_begin()[I]; |
5733 | } |
5734 | |
5735 | /// Retrieve all of the protocol qualifiers. |
5736 | ArrayRef<ObjCProtocolDecl *> getProtocols() const { |
5737 | return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols()); |
5738 | } |
5739 | }; |
5740 | |
5741 | /// Represents a type parameter type in Objective C. It can take |
5742 | /// a list of protocols. |
5743 | class ObjCTypeParamType : public Type, |
5744 | public ObjCProtocolQualifiers<ObjCTypeParamType>, |
5745 | public llvm::FoldingSetNode { |
5746 | friend class ASTContext; |
5747 | friend class ObjCProtocolQualifiers<ObjCTypeParamType>; |
5748 | |
5749 | /// The number of protocols stored on this type. |
5750 | unsigned NumProtocols : 6; |
5751 | |
5752 | ObjCTypeParamDecl *OTPDecl; |
5753 | |
5754 | /// The protocols are stored after the ObjCTypeParamType node. In the |
5755 | /// canonical type, the list of protocols are sorted alphabetically |
5756 | /// and uniqued. |
5757 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5758 | |
5759 | /// Return the number of qualifying protocols in this interface type, |
5760 | /// or 0 if there are none. |
5761 | unsigned getNumProtocolsImpl() const { |
5762 | return NumProtocols; |
5763 | } |
5764 | |
5765 | void setNumProtocolsImpl(unsigned N) { |
5766 | NumProtocols = N; |
5767 | } |
5768 | |
5769 | ObjCTypeParamType(const ObjCTypeParamDecl *D, |
5770 | QualType can, |
5771 | ArrayRef<ObjCProtocolDecl *> protocols); |
5772 | |
5773 | public: |
5774 | bool isSugared() const { return true; } |
5775 | QualType desugar() const { return getCanonicalTypeInternal(); } |
5776 | |
5777 | static bool classof(const Type *T) { |
5778 | return T->getTypeClass() == ObjCTypeParam; |
5779 | } |
5780 | |
5781 | void Profile(llvm::FoldingSetNodeID &ID); |
5782 | static void Profile(llvm::FoldingSetNodeID &ID, |
5783 | const ObjCTypeParamDecl *OTPDecl, |
5784 | QualType CanonicalType, |
5785 | ArrayRef<ObjCProtocolDecl *> protocols); |
5786 | |
5787 | ObjCTypeParamDecl *getDecl() const { return OTPDecl; } |
5788 | }; |
5789 | |
5790 | /// Represents a class type in Objective C. |
5791 | /// |
5792 | /// Every Objective C type is a combination of a base type, a set of |
5793 | /// type arguments (optional, for parameterized classes) and a list of |
5794 | /// protocols. |
5795 | /// |
5796 | /// Given the following declarations: |
5797 | /// \code |
5798 | /// \@class C<T>; |
5799 | /// \@protocol P; |
5800 | /// \endcode |
5801 | /// |
5802 | /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType |
5803 | /// with base C and no protocols. |
5804 | /// |
5805 | /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P]. |
5806 | /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no |
5807 | /// protocol list. |
5808 | /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*', |
5809 | /// and protocol list [P]. |
5810 | /// |
5811 | /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose |
5812 | /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType |
5813 | /// and no protocols. |
5814 | /// |
5815 | /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType |
5816 | /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually |
5817 | /// this should get its own sugar class to better represent the source. |
5818 | class ObjCObjectType : public Type, |
5819 | public ObjCProtocolQualifiers<ObjCObjectType> { |
5820 | friend class ObjCProtocolQualifiers<ObjCObjectType>; |
5821 | |
5822 | // ObjCObjectType.NumTypeArgs - the number of type arguments stored |
5823 | // after the ObjCObjectPointerType node. |
5824 | // ObjCObjectType.NumProtocols - the number of protocols stored |
5825 | // after the type arguments of ObjCObjectPointerType node. |
5826 | // |
5827 | // These protocols are those written directly on the type. If |
5828 | // protocol qualifiers ever become additive, the iterators will need |
5829 | // to get kindof complicated. |
5830 | // |
5831 | // In the canonical object type, these are sorted alphabetically |
5832 | // and uniqued. |
5833 | |
5834 | /// Either a BuiltinType or an InterfaceType or sugar for either. |
5835 | QualType BaseType; |
5836 | |
5837 | /// Cached superclass type. |
5838 | mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool> |
5839 | CachedSuperClassType; |
5840 | |
5841 | QualType *getTypeArgStorage(); |
5842 | const QualType *getTypeArgStorage() const { |
5843 | return const_cast<ObjCObjectType *>(this)->getTypeArgStorage(); |
5844 | } |
5845 | |
5846 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5847 | /// Return the number of qualifying protocols in this interface type, |
5848 | /// or 0 if there are none. |
5849 | unsigned getNumProtocolsImpl() const { |
5850 | return ObjCObjectTypeBits.NumProtocols; |
5851 | } |
5852 | void setNumProtocolsImpl(unsigned N) { |
5853 | ObjCObjectTypeBits.NumProtocols = N; |
5854 | } |
5855 | |
5856 | protected: |
5857 | enum Nonce_ObjCInterface { Nonce_ObjCInterface }; |
5858 | |
5859 | ObjCObjectType(QualType Canonical, QualType Base, |
5860 | ArrayRef<QualType> typeArgs, |
5861 | ArrayRef<ObjCProtocolDecl *> protocols, |
5862 | bool isKindOf); |
5863 | |
5864 | ObjCObjectType(enum Nonce_ObjCInterface) |
5865 | : Type(ObjCInterface, QualType(), TypeDependence::None), |
5866 | BaseType(QualType(this_(), 0)) { |
5867 | ObjCObjectTypeBits.NumProtocols = 0; |
5868 | ObjCObjectTypeBits.NumTypeArgs = 0; |
5869 | ObjCObjectTypeBits.IsKindOf = 0; |
5870 | } |
5871 | |
5872 | void computeSuperClassTypeSlow() const; |
5873 | |
5874 | public: |
5875 | /// Gets the base type of this object type. This is always (possibly |
5876 | /// sugar for) one of: |
5877 | /// - the 'id' builtin type (as opposed to the 'id' type visible to the |
5878 | /// user, which is a typedef for an ObjCObjectPointerType) |
5879 | /// - the 'Class' builtin type (same caveat) |
5880 | /// - an ObjCObjectType (currently always an ObjCInterfaceType) |
5881 | QualType getBaseType() const { return BaseType; } |
5882 | |
5883 | bool isObjCId() const { |
5884 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); |
5885 | } |
5886 | |
5887 | bool isObjCClass() const { |
5888 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); |
5889 | } |
5890 | |
5891 | bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } |
5892 | bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } |
5893 | bool isObjCUnqualifiedIdOrClass() const { |
5894 | if (!qual_empty()) return false; |
5895 | if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) |
5896 | return T->getKind() == BuiltinType::ObjCId || |
5897 | T->getKind() == BuiltinType::ObjCClass; |
5898 | return false; |
5899 | } |
5900 | bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } |
5901 | bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } |
5902 | |
5903 | /// Gets the interface declaration for this object type, if the base type |
5904 | /// really is an interface. |
5905 | ObjCInterfaceDecl *getInterface() const; |
5906 | |
5907 | /// Determine whether this object type is "specialized", meaning |
5908 | /// that it has type arguments. |
5909 | bool isSpecialized() const; |
5910 | |
5911 | /// Determine whether this object type was written with type arguments. |
5912 | bool isSpecializedAsWritten() const { |
5913 | return ObjCObjectTypeBits.NumTypeArgs > 0; |
5914 | } |
5915 | |
5916 | /// Determine whether this object type is "unspecialized", meaning |
5917 | /// that it has no type arguments. |
5918 | bool isUnspecialized() const { return !isSpecialized(); } |
5919 | |
5920 | /// Determine whether this object type is "unspecialized" as |
5921 | /// written, meaning that it has no type arguments. |
5922 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
5923 | |
5924 | /// Retrieve the type arguments of this object type (semantically). |
5925 | ArrayRef<QualType> getTypeArgs() const; |
5926 | |
5927 | /// Retrieve the type arguments of this object type as they were |
5928 | /// written. |
5929 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
5930 | return llvm::makeArrayRef(getTypeArgStorage(), |
5931 | ObjCObjectTypeBits.NumTypeArgs); |
5932 | } |
5933 | |
5934 | /// Whether this is a "__kindof" type as written. |
5935 | bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; } |
5936 | |
5937 | /// Whether this ia a "__kindof" type (semantically). |
5938 | bool isKindOfType() const; |
5939 | |
5940 | /// Retrieve the type of the superclass of this object type. |
5941 | /// |
5942 | /// This operation substitutes any type arguments into the |
5943 | /// superclass of the current class type, potentially producing a |
5944 | /// specialization of the superclass type. Produces a null type if |
5945 | /// there is no superclass. |
5946 | QualType getSuperClassType() const { |
5947 | if (!CachedSuperClassType.getInt()) |
5948 | computeSuperClassTypeSlow(); |
5949 | |
5950 | assert(CachedSuperClassType.getInt() && "Superclass not set?")(static_cast <bool> (CachedSuperClassType.getInt() && "Superclass not set?") ? void (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 5950, __extension__ __PRETTY_FUNCTION__)); |
5951 | return QualType(CachedSuperClassType.getPointer(), 0); |
5952 | } |
5953 | |
5954 | /// Strip off the Objective-C "kindof" type and (with it) any |
5955 | /// protocol qualifiers. |
5956 | QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const; |
5957 | |
5958 | bool isSugared() const { return false; } |
5959 | QualType desugar() const { return QualType(this, 0); } |
5960 | |
5961 | static bool classof(const Type *T) { |
5962 | return T->getTypeClass() == ObjCObject || |
5963 | T->getTypeClass() == ObjCInterface; |
5964 | } |
5965 | }; |
5966 | |
5967 | /// A class providing a concrete implementation |
5968 | /// of ObjCObjectType, so as to not increase the footprint of |
5969 | /// ObjCInterfaceType. Code outside of ASTContext and the core type |
5970 | /// system should not reference this type. |
5971 | class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { |
5972 | friend class ASTContext; |
5973 | |
5974 | // If anyone adds fields here, ObjCObjectType::getProtocolStorage() |
5975 | // will need to be modified. |
5976 | |
5977 | ObjCObjectTypeImpl(QualType Canonical, QualType Base, |
5978 | ArrayRef<QualType> typeArgs, |
5979 | ArrayRef<ObjCProtocolDecl *> protocols, |
5980 | bool isKindOf) |
5981 | : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {} |
5982 | |
5983 | public: |
5984 | void Profile(llvm::FoldingSetNodeID &ID); |
5985 | static void Profile(llvm::FoldingSetNodeID &ID, |
5986 | QualType Base, |
5987 | ArrayRef<QualType> typeArgs, |
5988 | ArrayRef<ObjCProtocolDecl *> protocols, |
5989 | bool isKindOf); |
5990 | }; |
5991 | |
5992 | inline QualType *ObjCObjectType::getTypeArgStorage() { |
5993 | return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1); |
5994 | } |
5995 | |
5996 | inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() { |
5997 | return reinterpret_cast<ObjCProtocolDecl**>( |
5998 | getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs); |
5999 | } |
6000 | |
6001 | inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() { |
6002 | return reinterpret_cast<ObjCProtocolDecl**>( |
6003 | static_cast<ObjCTypeParamType*>(this)+1); |
6004 | } |
6005 | |
6006 | /// Interfaces are the core concept in Objective-C for object oriented design. |
6007 | /// They basically correspond to C++ classes. There are two kinds of interface |
6008 | /// types: normal interfaces like `NSString`, and qualified interfaces, which |
6009 | /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`. |
6010 | /// |
6011 | /// ObjCInterfaceType guarantees the following properties when considered |
6012 | /// as a subtype of its superclass, ObjCObjectType: |
6013 | /// - There are no protocol qualifiers. To reinforce this, code which |
6014 | /// tries to invoke the protocol methods via an ObjCInterfaceType will |
6015 | /// fail to compile. |
6016 | /// - It is its own base type. That is, if T is an ObjCInterfaceType*, |
6017 | /// T->getBaseType() == QualType(T, 0). |
6018 | class ObjCInterfaceType : public ObjCObjectType { |
6019 | friend class ASTContext; // ASTContext creates these. |
6020 | friend class ASTReader; |
6021 | friend class ObjCInterfaceDecl; |
6022 | template <class T> friend class serialization::AbstractTypeReader; |
6023 | |
6024 | mutable ObjCInterfaceDecl *Decl; |
6025 | |
6026 | ObjCInterfaceType(const ObjCInterfaceDecl *D) |
6027 | : ObjCObjectType(Nonce_ObjCInterface), |
6028 | Decl(const_cast<ObjCInterfaceDecl*>(D)) {} |
6029 | |
6030 | public: |
6031 | /// Get the declaration of this interface. |
6032 | ObjCInterfaceDecl *getDecl() const { return Decl; } |
6033 | |
6034 | bool isSugared() const { return false; } |
6035 | QualType desugar() const { return QualType(this, 0); } |
6036 | |
6037 | static bool classof(const Type *T) { |
6038 | return T->getTypeClass() == ObjCInterface; |
6039 | } |
6040 | |
6041 | // Nonsense to "hide" certain members of ObjCObjectType within this |
6042 | // class. People asking for protocols on an ObjCInterfaceType are |
6043 | // not going to get what they want: ObjCInterfaceTypes are |
6044 | // guaranteed to have no protocols. |
6045 | enum { |
6046 | qual_iterator, |
6047 | qual_begin, |
6048 | qual_end, |
6049 | getNumProtocols, |
6050 | getProtocol |
6051 | }; |
6052 | }; |
6053 | |
6054 | inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { |
6055 | QualType baseType = getBaseType(); |
6056 | while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) { |
6057 | if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT)) |
6058 | return T->getDecl(); |
6059 | |
6060 | baseType = ObjT->getBaseType(); |
6061 | } |
6062 | |
6063 | return nullptr; |
6064 | } |
6065 | |
6066 | /// Represents a pointer to an Objective C object. |
6067 | /// |
6068 | /// These are constructed from pointer declarators when the pointee type is |
6069 | /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class' |
6070 | /// types are typedefs for these, and the protocol-qualified types 'id<P>' |
6071 | /// and 'Class<P>' are translated into these. |
6072 | /// |
6073 | /// Pointers to pointers to Objective C objects are still PointerTypes; |
6074 | /// only the first level of pointer gets it own type implementation. |
6075 | class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { |
6076 | friend class ASTContext; // ASTContext creates these. |
6077 | |
6078 | QualType PointeeType; |
6079 | |
6080 | ObjCObjectPointerType(QualType Canonical, QualType Pointee) |
6081 | : Type(ObjCObjectPointer, Canonical, Pointee->getDependence()), |
6082 | PointeeType(Pointee) {} |
6083 | |
6084 | public: |
6085 | /// Gets the type pointed to by this ObjC pointer. |
6086 | /// The result will always be an ObjCObjectType or sugar thereof. |
6087 | QualType getPointeeType() const { return PointeeType; } |
6088 | |
6089 | /// Gets the type pointed to by this ObjC pointer. Always returns non-null. |
6090 | /// |
6091 | /// This method is equivalent to getPointeeType() except that |
6092 | /// it discards any typedefs (or other sugar) between this |
6093 | /// type and the "outermost" object type. So for: |
6094 | /// \code |
6095 | /// \@class A; \@protocol P; \@protocol Q; |
6096 | /// typedef A<P> AP; |
6097 | /// typedef A A1; |
6098 | /// typedef A1<P> A1P; |
6099 | /// typedef A1P<Q> A1PQ; |
6100 | /// \endcode |
6101 | /// For 'A*', getObjectType() will return 'A'. |
6102 | /// For 'A<P>*', getObjectType() will return 'A<P>'. |
6103 | /// For 'AP*', getObjectType() will return 'A<P>'. |
6104 | /// For 'A1*', getObjectType() will return 'A'. |
6105 | /// For 'A1<P>*', getObjectType() will return 'A1<P>'. |
6106 | /// For 'A1P*', getObjectType() will return 'A1<P>'. |
6107 | /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because |
6108 | /// adding protocols to a protocol-qualified base discards the |
6109 | /// old qualifiers (for now). But if it didn't, getObjectType() |
6110 | /// would return 'A1P<Q>' (and we'd have to make iterating over |
6111 | /// qualifiers more complicated). |
6112 | const ObjCObjectType *getObjectType() const { |
6113 | return PointeeType->castAs<ObjCObjectType>(); |
6114 | } |
6115 | |
6116 | /// If this pointer points to an Objective C |
6117 | /// \@interface type, gets the type for that interface. Any protocol |
6118 | /// qualifiers on the interface are ignored. |
6119 | /// |
6120 | /// \return null if the base type for this pointer is 'id' or 'Class' |
6121 | const ObjCInterfaceType *getInterfaceType() const; |
6122 | |
6123 | /// If this pointer points to an Objective \@interface |
6124 | /// type, gets the declaration for that interface. |
6125 | /// |
6126 | /// \return null if the base type for this pointer is 'id' or 'Class' |
6127 | ObjCInterfaceDecl *getInterfaceDecl() const { |
6128 | return getObjectType()->getInterface(); |
6129 | } |
6130 | |
6131 | /// True if this is equivalent to the 'id' type, i.e. if |
6132 | /// its object type is the primitive 'id' type with no protocols. |
6133 | bool isObjCIdType() const { |
6134 | return getObjectType()->isObjCUnqualifiedId(); |
6135 | } |
6136 | |
6137 | /// True if this is equivalent to the 'Class' type, |
6138 | /// i.e. if its object tive is the primitive 'Class' type with no protocols. |
6139 | bool isObjCClassType() const { |
6140 | return getObjectType()->isObjCUnqualifiedClass(); |
6141 | } |
6142 | |
6143 | /// True if this is equivalent to the 'id' or 'Class' type, |
6144 | bool isObjCIdOrClassType() const { |
6145 | return getObjectType()->isObjCUnqualifiedIdOrClass(); |
6146 | } |
6147 | |
6148 | /// True if this is equivalent to 'id<P>' for some non-empty set of |
6149 | /// protocols. |
6150 | bool isObjCQualifiedIdType() const { |
6151 | return getObjectType()->isObjCQualifiedId(); |
6152 | } |
6153 | |
6154 | /// True if this is equivalent to 'Class<P>' for some non-empty set of |
6155 | /// protocols. |
6156 | bool isObjCQualifiedClassType() const { |
6157 | return getObjectType()->isObjCQualifiedClass(); |
6158 | } |
6159 | |
6160 | /// Whether this is a "__kindof" type. |
6161 | bool isKindOfType() const { return getObjectType()->isKindOfType(); } |
6162 | |
6163 | /// Whether this type is specialized, meaning that it has type arguments. |
6164 | bool isSpecialized() const { return getObjectType()->isSpecialized(); } |
6165 | |
6166 | /// Whether this type is specialized, meaning that it has type arguments. |
6167 | bool isSpecializedAsWritten() const { |
6168 | return getObjectType()->isSpecializedAsWritten(); |
6169 | } |
6170 | |
6171 | /// Whether this type is unspecialized, meaning that is has no type arguments. |
6172 | bool isUnspecialized() const { return getObjectType()->isUnspecialized(); } |
6173 | |
6174 | /// Determine whether this object type is "unspecialized" as |
6175 | /// written, meaning that it has no type arguments. |
6176 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
6177 | |
6178 | /// Retrieve the type arguments for this type. |
6179 | ArrayRef<QualType> getTypeArgs() const { |
6180 | return getObjectType()->getTypeArgs(); |
6181 | } |
6182 | |
6183 | /// Retrieve the type arguments for this type. |
6184 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
6185 | return getObjectType()->getTypeArgsAsWritten(); |
6186 | } |
6187 | |
6188 | /// An iterator over the qualifiers on the object type. Provided |
6189 | /// for convenience. This will always iterate over the full set of |
6190 | /// protocols on a type, not just those provided directly. |
6191 | using qual_iterator = ObjCObjectType::qual_iterator; |
6192 | using qual_range = llvm::iterator_range<qual_iterator>; |
6193 | |
6194 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
6195 | |
6196 | qual_iterator qual_begin() const { |
6197 | return getObjectType()->qual_begin(); |
6198 | } |
6199 | |
6200 | qual_iterator qual_end() const { |
6201 | return getObjectType()->qual_end(); |
6202 | } |
6203 | |
6204 | bool qual_empty() const { return getObjectType()->qual_empty(); } |
6205 | |
6206 | /// Return the number of qualifying protocols on the object type. |
6207 | unsigned getNumProtocols() const { |
6208 | return getObjectType()->getNumProtocols(); |
6209 | } |
6210 | |
6211 | /// Retrieve a qualifying protocol by index on the object type. |
6212 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
6213 | return getObjectType()->getProtocol(I); |
6214 | } |
6215 | |
6216 | bool isSugared() const { return false; } |
6217 | QualType desugar() const { return QualType(this, 0); } |
6218 | |
6219 | /// Retrieve the type of the superclass of this object pointer type. |
6220 | /// |
6221 | /// This operation substitutes any type arguments into the |
6222 | /// superclass of the current class type, potentially producing a |
6223 | /// pointer to a specialization of the superclass type. Produces a |
6224 | /// null type if there is no superclass. |
6225 | QualType getSuperClassType() const; |
6226 | |
6227 | /// Strip off the Objective-C "kindof" type and (with it) any |
6228 | /// protocol qualifiers. |
6229 | const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals( |
6230 | const ASTContext &ctx) const; |
6231 | |
6232 | void Profile(llvm::FoldingSetNodeID &ID) { |
6233 | Profile(ID, getPointeeType()); |
6234 | } |
6235 | |
6236 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6237 | ID.AddPointer(T.getAsOpaquePtr()); |
6238 | } |
6239 | |
6240 | static bool classof(const Type *T) { |
6241 | return T->getTypeClass() == ObjCObjectPointer; |
6242 | } |
6243 | }; |
6244 | |
6245 | class AtomicType : public Type, public llvm::FoldingSetNode { |
6246 | friend class ASTContext; // ASTContext creates these. |
6247 | |
6248 | QualType ValueType; |
6249 | |
6250 | AtomicType(QualType ValTy, QualType Canonical) |
6251 | : Type(Atomic, Canonical, ValTy->getDependence()), ValueType(ValTy) {} |
6252 | |
6253 | public: |
6254 | /// Gets the type contained by this atomic type, i.e. |
6255 | /// the type returned by performing an atomic load of this atomic type. |
6256 | QualType getValueType() const { return ValueType; } |
6257 | |
6258 | bool isSugared() const { return false; } |
6259 | QualType desugar() const { return QualType(this, 0); } |
6260 | |
6261 | void Profile(llvm::FoldingSetNodeID &ID) { |
6262 | Profile(ID, getValueType()); |
6263 | } |
6264 | |
6265 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6266 | ID.AddPointer(T.getAsOpaquePtr()); |
6267 | } |
6268 | |
6269 | static bool classof(const Type *T) { |
6270 | return T->getTypeClass() == Atomic; |
6271 | } |
6272 | }; |
6273 | |
6274 | /// PipeType - OpenCL20. |
6275 | class PipeType : public Type, public llvm::FoldingSetNode { |
6276 | friend class ASTContext; // ASTContext creates these. |
6277 | |
6278 | QualType ElementType; |
6279 | bool isRead; |
6280 | |
6281 | PipeType(QualType elemType, QualType CanonicalPtr, bool isRead) |
6282 | : Type(Pipe, CanonicalPtr, elemType->getDependence()), |
6283 | ElementType(elemType), isRead(isRead) {} |
6284 | |
6285 | public: |
6286 | QualType getElementType() const { return ElementType; } |
6287 | |
6288 | bool isSugared() const { return false; } |
6289 | |
6290 | QualType desugar() const { return QualType(this, 0); } |
6291 | |
6292 | void Profile(llvm::FoldingSetNodeID &ID) { |
6293 | Profile(ID, getElementType(), isReadOnly()); |
6294 | } |
6295 | |
6296 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) { |
6297 | ID.AddPointer(T.getAsOpaquePtr()); |
6298 | ID.AddBoolean(isRead); |
6299 | } |
6300 | |
6301 | static bool classof(const Type *T) { |
6302 | return T->getTypeClass() == Pipe; |
6303 | } |
6304 | |
6305 | bool isReadOnly() const { return isRead; } |
6306 | }; |
6307 | |
6308 | /// A fixed int type of a specified bitwidth. |
6309 | class ExtIntType final : public Type, public llvm::FoldingSetNode { |
6310 | friend class ASTContext; |
6311 | unsigned IsUnsigned : 1; |
6312 | unsigned NumBits : 24; |
6313 | |
6314 | protected: |
6315 | ExtIntType(bool isUnsigned, unsigned NumBits); |
6316 | |
6317 | public: |
6318 | bool isUnsigned() const { return IsUnsigned; } |
6319 | bool isSigned() const { return !IsUnsigned; } |
6320 | unsigned getNumBits() const { return NumBits; } |
6321 | |
6322 | bool isSugared() const { return false; } |
6323 | QualType desugar() const { return QualType(this, 0); } |
6324 | |
6325 | void Profile(llvm::FoldingSetNodeID &ID) { |
6326 | Profile(ID, isUnsigned(), getNumBits()); |
6327 | } |
6328 | |
6329 | static void Profile(llvm::FoldingSetNodeID &ID, bool IsUnsigned, |
6330 | unsigned NumBits) { |
6331 | ID.AddBoolean(IsUnsigned); |
6332 | ID.AddInteger(NumBits); |
6333 | } |
6334 | |
6335 | static bool classof(const Type *T) { return T->getTypeClass() == ExtInt; } |
6336 | }; |
6337 | |
6338 | class DependentExtIntType final : public Type, public llvm::FoldingSetNode { |
6339 | friend class ASTContext; |
6340 | const ASTContext &Context; |
6341 | llvm::PointerIntPair<Expr*, 1, bool> ExprAndUnsigned; |
6342 | |
6343 | protected: |
6344 | DependentExtIntType(const ASTContext &Context, bool IsUnsigned, |
6345 | Expr *NumBits); |
6346 | |
6347 | public: |
6348 | bool isUnsigned() const; |
6349 | bool isSigned() const { return !isUnsigned(); } |
6350 | Expr *getNumBitsExpr() const; |
6351 | |
6352 | bool isSugared() const { return false; } |
6353 | QualType desugar() const { return QualType(this, 0); } |
6354 | |
6355 | void Profile(llvm::FoldingSetNodeID &ID) { |
6356 | Profile(ID, Context, isUnsigned(), getNumBitsExpr()); |
6357 | } |
6358 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
6359 | bool IsUnsigned, Expr *NumBitsExpr); |
6360 | |
6361 | static bool classof(const Type *T) { |
6362 | return T->getTypeClass() == DependentExtInt; |
6363 | } |
6364 | }; |
6365 | |
6366 | /// A qualifier set is used to build a set of qualifiers. |
6367 | class QualifierCollector : public Qualifiers { |
6368 | public: |
6369 | QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} |
6370 | |
6371 | /// Collect any qualifiers on the given type and return an |
6372 | /// unqualified type. The qualifiers are assumed to be consistent |
6373 | /// with those already in the type. |
6374 | const Type *strip(QualType type) { |
6375 | addFastQualifiers(type.getLocalFastQualifiers()); |
6376 | if (!type.hasLocalNonFastQualifiers()) |
6377 | return type.getTypePtrUnsafe(); |
6378 | |
6379 | const ExtQuals *extQuals = type.getExtQualsUnsafe(); |
6380 | addConsistentQualifiers(extQuals->getQualifiers()); |
6381 | return extQuals->getBaseType(); |
6382 | } |
6383 | |
6384 | /// Apply the collected qualifiers to the given type. |
6385 | QualType apply(const ASTContext &Context, QualType QT) const; |
6386 | |
6387 | /// Apply the collected qualifiers to the given type. |
6388 | QualType apply(const ASTContext &Context, const Type* T) const; |
6389 | }; |
6390 | |
6391 | /// A container of type source information. |
6392 | /// |
6393 | /// A client can read the relevant info using TypeLoc wrappers, e.g: |
6394 | /// @code |
6395 | /// TypeLoc TL = TypeSourceInfo->getTypeLoc(); |
6396 | /// TL.getBeginLoc().print(OS, SrcMgr); |
6397 | /// @endcode |
6398 | class alignas(8) TypeSourceInfo { |
6399 | // Contains a memory block after the class, used for type source information, |
6400 | // allocated by ASTContext. |
6401 | friend class ASTContext; |
6402 | |
6403 | QualType Ty; |
6404 | |
6405 | TypeSourceInfo(QualType ty) : Ty(ty) {} |
6406 | |
6407 | public: |
6408 | /// Return the type wrapped by this type source info. |
6409 | QualType getType() const { return Ty; } |
6410 | |
6411 | /// Return the TypeLoc wrapper for the type source info. |
6412 | TypeLoc getTypeLoc() const; // implemented in TypeLoc.h |
6413 | |
6414 | /// Override the type stored in this TypeSourceInfo. Use with caution! |
6415 | void overrideType(QualType T) { Ty = T; } |
6416 | }; |
6417 | |
6418 | // Inline function definitions. |
6419 | |
6420 | inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { |
6421 | SplitQualType desugar = |
6422 | Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); |
6423 | desugar.Quals.addConsistentQualifiers(Quals); |
6424 | return desugar; |
6425 | } |
6426 | |
6427 | inline const Type *QualType::getTypePtr() const { |
6428 | return getCommonPtr()->BaseType; |
6429 | } |
6430 | |
6431 | inline const Type *QualType::getTypePtrOrNull() const { |
6432 | return (isNull() ? nullptr : getCommonPtr()->BaseType); |
6433 | } |
6434 | |
6435 | inline SplitQualType QualType::split() const { |
6436 | if (!hasLocalNonFastQualifiers()) |
6437 | return SplitQualType(getTypePtrUnsafe(), |
6438 | Qualifiers::fromFastMask(getLocalFastQualifiers())); |
6439 | |
6440 | const ExtQuals *eq = getExtQualsUnsafe(); |
6441 | Qualifiers qs = eq->getQualifiers(); |
6442 | qs.addFastQualifiers(getLocalFastQualifiers()); |
6443 | return SplitQualType(eq->getBaseType(), qs); |
6444 | } |
6445 | |
6446 | inline Qualifiers QualType::getLocalQualifiers() const { |
6447 | Qualifiers Quals; |
6448 | if (hasLocalNonFastQualifiers()) |
6449 | Quals = getExtQualsUnsafe()->getQualifiers(); |
6450 | Quals.addFastQualifiers(getLocalFastQualifiers()); |
6451 | return Quals; |
6452 | } |
6453 | |
6454 | inline Qualifiers QualType::getQualifiers() const { |
6455 | Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); |
6456 | quals.addFastQualifiers(getLocalFastQualifiers()); |
6457 | return quals; |
6458 | } |
6459 | |
6460 | inline unsigned QualType::getCVRQualifiers() const { |
6461 | unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); |
6462 | cvr |= getLocalCVRQualifiers(); |
6463 | return cvr; |
6464 | } |
6465 | |
6466 | inline QualType QualType::getCanonicalType() const { |
6467 | QualType canon = getCommonPtr()->CanonicalType; |
6468 | return canon.withFastQualifiers(getLocalFastQualifiers()); |
6469 | } |
6470 | |
6471 | inline bool QualType::isCanonical() const { |
6472 | return getTypePtr()->isCanonicalUnqualified(); |
6473 | } |
6474 | |
6475 | inline bool QualType::isCanonicalAsParam() const { |
6476 | if (!isCanonical()) return false; |
6477 | if (hasLocalQualifiers()) return false; |
6478 | |
6479 | const Type *T = getTypePtr(); |
6480 | if (T->isVariablyModifiedType() && T->hasSizedVLAType()) |
6481 | return false; |
6482 | |
6483 | return !isa<FunctionType>(T) && !isa<ArrayType>(T); |
6484 | } |
6485 | |
6486 | inline bool QualType::isConstQualified() const { |
6487 | return isLocalConstQualified() || |
6488 | getCommonPtr()->CanonicalType.isLocalConstQualified(); |
6489 | } |
6490 | |
6491 | inline bool QualType::isRestrictQualified() const { |
6492 | return isLocalRestrictQualified() || |
6493 | getCommonPtr()->CanonicalType.isLocalRestrictQualified(); |
6494 | } |
6495 | |
6496 | |
6497 | inline bool QualType::isVolatileQualified() const { |
6498 | return isLocalVolatileQualified() || |
6499 | getCommonPtr()->CanonicalType.isLocalVolatileQualified(); |
6500 | } |
6501 | |
6502 | inline bool QualType::hasQualifiers() const { |
6503 | return hasLocalQualifiers() || |
6504 | getCommonPtr()->CanonicalType.hasLocalQualifiers(); |
6505 | } |
6506 | |
6507 | inline QualType QualType::getUnqualifiedType() const { |
6508 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6509 | return QualType(getTypePtr(), 0); |
6510 | |
6511 | return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); |
6512 | } |
6513 | |
6514 | inline SplitQualType QualType::getSplitUnqualifiedType() const { |
6515 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6516 | return split(); |
6517 | |
6518 | return getSplitUnqualifiedTypeImpl(*this); |
6519 | } |
6520 | |
6521 | inline void QualType::removeLocalConst() { |
6522 | removeLocalFastQualifiers(Qualifiers::Const); |
6523 | } |
6524 | |
6525 | inline void QualType::removeLocalRestrict() { |
6526 | removeLocalFastQualifiers(Qualifiers::Restrict); |
6527 | } |
6528 | |
6529 | inline void QualType::removeLocalVolatile() { |
6530 | removeLocalFastQualifiers(Qualifiers::Volatile); |
6531 | } |
6532 | |
6533 | inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { |
6534 | assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")(static_cast <bool> (!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits") ? void (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 6534, __extension__ __PRETTY_FUNCTION__)); |
6535 | static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask, |
6536 | "Fast bits differ from CVR bits!"); |
6537 | |
6538 | // Fast path: we don't need to touch the slow qualifiers. |
6539 | removeLocalFastQualifiers(Mask); |
6540 | } |
6541 | |
6542 | /// Check if this type has any address space qualifier. |
6543 | inline bool QualType::hasAddressSpace() const { |
6544 | return getQualifiers().hasAddressSpace(); |
6545 | } |
6546 | |
6547 | /// Return the address space of this type. |
6548 | inline LangAS QualType::getAddressSpace() const { |
6549 | return getQualifiers().getAddressSpace(); |
6550 | } |
6551 | |
6552 | /// Return the gc attribute of this type. |
6553 | inline Qualifiers::GC QualType::getObjCGCAttr() const { |
6554 | return getQualifiers().getObjCGCAttr(); |
6555 | } |
6556 | |
6557 | inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { |
6558 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6559 | return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD); |
6560 | return false; |
6561 | } |
6562 | |
6563 | inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const { |
6564 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6565 | return hasNonTrivialToPrimitiveDestructCUnion(RD); |
6566 | return false; |
6567 | } |
6568 | |
6569 | inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const { |
6570 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6571 | return hasNonTrivialToPrimitiveCopyCUnion(RD); |
6572 | return false; |
6573 | } |
6574 | |
6575 | inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { |
6576 | if (const auto *PT = t.getAs<PointerType>()) { |
6577 | if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>()) |
6578 | return FT->getExtInfo(); |
6579 | } else if (const auto *FT = t.getAs<FunctionType>()) |
6580 | return FT->getExtInfo(); |
6581 | |
6582 | return FunctionType::ExtInfo(); |
6583 | } |
6584 | |
6585 | inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { |
6586 | return getFunctionExtInfo(*t); |
6587 | } |
6588 | |
6589 | /// Determine whether this type is more |
6590 | /// qualified than the Other type. For example, "const volatile int" |
6591 | /// is more qualified than "const int", "volatile int", and |
6592 | /// "int". However, it is not more qualified than "const volatile |
6593 | /// int". |
6594 | inline bool QualType::isMoreQualifiedThan(QualType other) const { |
6595 | Qualifiers MyQuals = getQualifiers(); |
6596 | Qualifiers OtherQuals = other.getQualifiers(); |
6597 | return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals)); |
6598 | } |
6599 | |
6600 | /// Determine whether this type is at last |
6601 | /// as qualified as the Other type. For example, "const volatile |
6602 | /// int" is at least as qualified as "const int", "volatile int", |
6603 | /// "int", and "const volatile int". |
6604 | inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { |
6605 | Qualifiers OtherQuals = other.getQualifiers(); |
6606 | |
6607 | // Ignore __unaligned qualifier if this type is a void. |
6608 | if (getUnqualifiedType()->isVoidType()) |
6609 | OtherQuals.removeUnaligned(); |
6610 | |
6611 | return getQualifiers().compatiblyIncludes(OtherQuals); |
6612 | } |
6613 | |
6614 | /// If Type is a reference type (e.g., const |
6615 | /// int&), returns the type that the reference refers to ("const |
6616 | /// int"). Otherwise, returns the type itself. This routine is used |
6617 | /// throughout Sema to implement C++ 5p6: |
6618 | /// |
6619 | /// If an expression initially has the type "reference to T" (8.3.2, |
6620 | /// 8.5.3), the type is adjusted to "T" prior to any further |
6621 | /// analysis, the expression designates the object or function |
6622 | /// denoted by the reference, and the expression is an lvalue. |
6623 | inline QualType QualType::getNonReferenceType() const { |
6624 | if (const auto *RefType = (*this)->getAs<ReferenceType>()) |
6625 | return RefType->getPointeeType(); |
6626 | else |
6627 | return *this; |
6628 | } |
6629 | |
6630 | inline bool QualType::isCForbiddenLValueType() const { |
6631 | return ((getTypePtr()->isVoidType() && !hasQualifiers()) || |
6632 | getTypePtr()->isFunctionType()); |
6633 | } |
6634 | |
6635 | /// Tests whether the type is categorized as a fundamental type. |
6636 | /// |
6637 | /// \returns True for types specified in C++0x [basic.fundamental]. |
6638 | inline bool Type::isFundamentalType() const { |
6639 | return isVoidType() || |
6640 | isNullPtrType() || |
6641 | // FIXME: It's really annoying that we don't have an |
6642 | // 'isArithmeticType()' which agrees with the standard definition. |
6643 | (isArithmeticType() && !isEnumeralType()); |
6644 | } |
6645 | |
6646 | /// Tests whether the type is categorized as a compound type. |
6647 | /// |
6648 | /// \returns True for types specified in C++0x [basic.compound]. |
6649 | inline bool Type::isCompoundType() const { |
6650 | // C++0x [basic.compound]p1: |
6651 | // Compound types can be constructed in the following ways: |
6652 | // -- arrays of objects of a given type [...]; |
6653 | return isArrayType() || |
6654 | // -- functions, which have parameters of given types [...]; |
6655 | isFunctionType() || |
6656 | // -- pointers to void or objects or functions [...]; |
6657 | isPointerType() || |
6658 | // -- references to objects or functions of a given type. [...] |
6659 | isReferenceType() || |
6660 | // -- classes containing a sequence of objects of various types, [...]; |
6661 | isRecordType() || |
6662 | // -- unions, which are classes capable of containing objects of different |
6663 | // types at different times; |
6664 | isUnionType() || |
6665 | // -- enumerations, which comprise a set of named constant values. [...]; |
6666 | isEnumeralType() || |
6667 | // -- pointers to non-static class members, [...]. |
6668 | isMemberPointerType(); |
6669 | } |
6670 | |
6671 | inline bool Type::isFunctionType() const { |
6672 | return isa<FunctionType>(CanonicalType); |
6673 | } |
6674 | |
6675 | inline bool Type::isPointerType() const { |
6676 | return isa<PointerType>(CanonicalType); |
6677 | } |
6678 | |
6679 | inline bool Type::isAnyPointerType() const { |
6680 | return isPointerType() || isObjCObjectPointerType(); |
6681 | } |
6682 | |
6683 | inline bool Type::isBlockPointerType() const { |
6684 | return isa<BlockPointerType>(CanonicalType); |
6685 | } |
6686 | |
6687 | inline bool Type::isReferenceType() const { |
6688 | return isa<ReferenceType>(CanonicalType); |
6689 | } |
6690 | |
6691 | inline bool Type::isLValueReferenceType() const { |
6692 | return isa<LValueReferenceType>(CanonicalType); |
6693 | } |
6694 | |
6695 | inline bool Type::isRValueReferenceType() const { |
6696 | return isa<RValueReferenceType>(CanonicalType); |
6697 | } |
6698 | |
6699 | inline bool Type::isObjectPointerType() const { |
6700 | // Note: an "object pointer type" is not the same thing as a pointer to an |
6701 | // object type; rather, it is a pointer to an object type or a pointer to cv |
6702 | // void. |
6703 | if (const auto *T = getAs<PointerType>()) |
6704 | return !T->getPointeeType()->isFunctionType(); |
6705 | else |
6706 | return false; |
6707 | } |
6708 | |
6709 | inline bool Type::isFunctionPointerType() const { |
6710 | if (const auto *T = getAs<PointerType>()) |
6711 | return T->getPointeeType()->isFunctionType(); |
6712 | else |
6713 | return false; |
6714 | } |
6715 | |
6716 | inline bool Type::isFunctionReferenceType() const { |
6717 | if (const auto *T = getAs<ReferenceType>()) |
6718 | return T->getPointeeType()->isFunctionType(); |
6719 | else |
6720 | return false; |
6721 | } |
6722 | |
6723 | inline bool Type::isMemberPointerType() const { |
6724 | return isa<MemberPointerType>(CanonicalType); |
6725 | } |
6726 | |
6727 | inline bool Type::isMemberFunctionPointerType() const { |
6728 | if (const auto *T = getAs<MemberPointerType>()) |
6729 | return T->isMemberFunctionPointer(); |
6730 | else |
6731 | return false; |
6732 | } |
6733 | |
6734 | inline bool Type::isMemberDataPointerType() const { |
6735 | if (const auto *T = getAs<MemberPointerType>()) |
6736 | return T->isMemberDataPointer(); |
6737 | else |
6738 | return false; |
6739 | } |
6740 | |
6741 | inline bool Type::isArrayType() const { |
6742 | return isa<ArrayType>(CanonicalType); |
6743 | } |
6744 | |
6745 | inline bool Type::isConstantArrayType() const { |
6746 | return isa<ConstantArrayType>(CanonicalType); |
6747 | } |
6748 | |
6749 | inline bool Type::isIncompleteArrayType() const { |
6750 | return isa<IncompleteArrayType>(CanonicalType); |
6751 | } |
6752 | |
6753 | inline bool Type::isVariableArrayType() const { |
6754 | return isa<VariableArrayType>(CanonicalType); |
6755 | } |
6756 | |
6757 | inline bool Type::isDependentSizedArrayType() const { |
6758 | return isa<DependentSizedArrayType>(CanonicalType); |
6759 | } |
6760 | |
6761 | inline bool Type::isBuiltinType() const { |
6762 | return isa<BuiltinType>(CanonicalType); |
6763 | } |
6764 | |
6765 | inline bool Type::isRecordType() const { |
6766 | return isa<RecordType>(CanonicalType); |
6767 | } |
6768 | |
6769 | inline bool Type::isEnumeralType() const { |
6770 | return isa<EnumType>(CanonicalType); |
6771 | } |
6772 | |
6773 | inline bool Type::isAnyComplexType() const { |
6774 | return isa<ComplexType>(CanonicalType); |
6775 | } |
6776 | |
6777 | inline bool Type::isVectorType() const { |
6778 | return isa<VectorType>(CanonicalType); |
6779 | } |
6780 | |
6781 | inline bool Type::isExtVectorType() const { |
6782 | return isa<ExtVectorType>(CanonicalType); |
6783 | } |
6784 | |
6785 | inline bool Type::isMatrixType() const { |
6786 | return isa<MatrixType>(CanonicalType); |
6787 | } |
6788 | |
6789 | inline bool Type::isConstantMatrixType() const { |
6790 | return isa<ConstantMatrixType>(CanonicalType); |
6791 | } |
6792 | |
6793 | inline bool Type::isDependentAddressSpaceType() const { |
6794 | return isa<DependentAddressSpaceType>(CanonicalType); |
6795 | } |
6796 | |
6797 | inline bool Type::isObjCObjectPointerType() const { |
6798 | return isa<ObjCObjectPointerType>(CanonicalType); |
6799 | } |
6800 | |
6801 | inline bool Type::isObjCObjectType() const { |
6802 | return isa<ObjCObjectType>(CanonicalType); |
6803 | } |
6804 | |
6805 | inline bool Type::isObjCObjectOrInterfaceType() const { |
6806 | return isa<ObjCInterfaceType>(CanonicalType) || |
6807 | isa<ObjCObjectType>(CanonicalType); |
6808 | } |
6809 | |
6810 | inline bool Type::isAtomicType() const { |
6811 | return isa<AtomicType>(CanonicalType); |
6812 | } |
6813 | |
6814 | inline bool Type::isUndeducedAutoType() const { |
6815 | return isa<AutoType>(CanonicalType); |
6816 | } |
6817 | |
6818 | inline bool Type::isObjCQualifiedIdType() const { |
6819 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6820 | return OPT->isObjCQualifiedIdType(); |
6821 | return false; |
6822 | } |
6823 | |
6824 | inline bool Type::isObjCQualifiedClassType() const { |
6825 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6826 | return OPT->isObjCQualifiedClassType(); |
6827 | return false; |
6828 | } |
6829 | |
6830 | inline bool Type::isObjCIdType() const { |
6831 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6832 | return OPT->isObjCIdType(); |
6833 | return false; |
6834 | } |
6835 | |
6836 | inline bool Type::isObjCClassType() const { |
6837 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6838 | return OPT->isObjCClassType(); |
6839 | return false; |
6840 | } |
6841 | |
6842 | inline bool Type::isObjCSelType() const { |
6843 | if (const auto *OPT = getAs<PointerType>()) |
6844 | return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); |
6845 | return false; |
6846 | } |
6847 | |
6848 | inline bool Type::isObjCBuiltinType() const { |
6849 | return isObjCIdType() || isObjCClassType() || isObjCSelType(); |
6850 | } |
6851 | |
6852 | inline bool Type::isDecltypeType() const { |
6853 | return isa<DecltypeType>(this); |
6854 | } |
6855 | |
6856 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
6857 | inline bool Type::is##Id##Type() const { \ |
6858 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6859 | } |
6860 | #include "clang/Basic/OpenCLImageTypes.def" |
6861 | |
6862 | inline bool Type::isSamplerT() const { |
6863 | return isSpecificBuiltinType(BuiltinType::OCLSampler); |
6864 | } |
6865 | |
6866 | inline bool Type::isEventT() const { |
6867 | return isSpecificBuiltinType(BuiltinType::OCLEvent); |
6868 | } |
6869 | |
6870 | inline bool Type::isClkEventT() const { |
6871 | return isSpecificBuiltinType(BuiltinType::OCLClkEvent); |
6872 | } |
6873 | |
6874 | inline bool Type::isQueueT() const { |
6875 | return isSpecificBuiltinType(BuiltinType::OCLQueue); |
6876 | } |
6877 | |
6878 | inline bool Type::isReserveIDT() const { |
6879 | return isSpecificBuiltinType(BuiltinType::OCLReserveID); |
6880 | } |
6881 | |
6882 | inline bool Type::isImageType() const { |
6883 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() || |
6884 | return |
6885 | #include "clang/Basic/OpenCLImageTypes.def" |
6886 | false; // end boolean or operation |
6887 | } |
6888 | |
6889 | inline bool Type::isPipeType() const { |
6890 | return isa<PipeType>(CanonicalType); |
6891 | } |
6892 | |
6893 | inline bool Type::isExtIntType() const { |
6894 | return isa<ExtIntType>(CanonicalType); |
6895 | } |
6896 | |
6897 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
6898 | inline bool Type::is##Id##Type() const { \ |
6899 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6900 | } |
6901 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6902 | |
6903 | inline bool Type::isOCLIntelSubgroupAVCType() const { |
6904 | #define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \ |
6905 | isOCLIntelSubgroupAVC##Id##Type() || |
6906 | return |
6907 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6908 | false; // end of boolean or operation |
6909 | } |
6910 | |
6911 | inline bool Type::isOCLExtOpaqueType() const { |
6912 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() || |
6913 | return |
6914 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6915 | false; // end of boolean or operation |
6916 | } |
6917 | |
6918 | inline bool Type::isOpenCLSpecificType() const { |
6919 | return isSamplerT() || isEventT() || isImageType() || isClkEventT() || |
6920 | isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType(); |
6921 | } |
6922 | |
6923 | inline bool Type::isTemplateTypeParmType() const { |
6924 | return isa<TemplateTypeParmType>(CanonicalType); |
6925 | } |
6926 | |
6927 | inline bool Type::isSpecificBuiltinType(unsigned K) const { |
6928 | if (const BuiltinType *BT = getAs<BuiltinType>()) { |
6929 | return BT->getKind() == static_cast<BuiltinType::Kind>(K); |
6930 | } |
6931 | return false; |
6932 | } |
6933 | |
6934 | inline bool Type::isPlaceholderType() const { |
6935 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6936 | return BT->isPlaceholderType(); |
6937 | return false; |
6938 | } |
6939 | |
6940 | inline const BuiltinType *Type::getAsPlaceholderType() const { |
6941 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6942 | if (BT->isPlaceholderType()) |
6943 | return BT; |
6944 | return nullptr; |
6945 | } |
6946 | |
6947 | inline bool Type::isSpecificPlaceholderType(unsigned K) const { |
6948 | assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))(static_cast <bool> (BuiltinType::isPlaceholderTypeKind ((BuiltinType::Kind) K)) ? void (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 6948, __extension__ __PRETTY_FUNCTION__)); |
6949 | return isSpecificBuiltinType(K); |
6950 | } |
6951 | |
6952 | inline bool Type::isNonOverloadPlaceholderType() const { |
6953 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6954 | return BT->isNonOverloadPlaceholderType(); |
6955 | return false; |
6956 | } |
6957 | |
6958 | inline bool Type::isVoidType() const { |
6959 | return isSpecificBuiltinType(BuiltinType::Void); |
6960 | } |
6961 | |
6962 | inline bool Type::isHalfType() const { |
6963 | // FIXME: Should we allow complex __fp16? Probably not. |
6964 | return isSpecificBuiltinType(BuiltinType::Half); |
6965 | } |
6966 | |
6967 | inline bool Type::isFloat16Type() const { |
6968 | return isSpecificBuiltinType(BuiltinType::Float16); |
6969 | } |
6970 | |
6971 | inline bool Type::isBFloat16Type() const { |
6972 | return isSpecificBuiltinType(BuiltinType::BFloat16); |
6973 | } |
6974 | |
6975 | inline bool Type::isFloat128Type() const { |
6976 | return isSpecificBuiltinType(BuiltinType::Float128); |
6977 | } |
6978 | |
6979 | inline bool Type::isNullPtrType() const { |
6980 | return isSpecificBuiltinType(BuiltinType::NullPtr); |
6981 | } |
6982 | |
6983 | bool IsEnumDeclComplete(EnumDecl *); |
6984 | bool IsEnumDeclScoped(EnumDecl *); |
6985 | |
6986 | inline bool Type::isIntegerType() const { |
6987 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6988 | return BT->getKind() >= BuiltinType::Bool && |
6989 | BT->getKind() <= BuiltinType::Int128; |
6990 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { |
6991 | // Incomplete enum types are not treated as integer types. |
6992 | // FIXME: In C++, enum types are never integer types. |
6993 | return IsEnumDeclComplete(ET->getDecl()) && |
6994 | !IsEnumDeclScoped(ET->getDecl()); |
6995 | } |
6996 | return isExtIntType(); |
6997 | } |
6998 | |
6999 | inline bool Type::isFixedPointType() const { |
7000 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7001 | return BT->getKind() >= BuiltinType::ShortAccum && |
7002 | BT->getKind() <= BuiltinType::SatULongFract; |
7003 | } |
7004 | return false; |
7005 | } |
7006 | |
7007 | inline bool Type::isFixedPointOrIntegerType() const { |
7008 | return isFixedPointType() || isIntegerType(); |
7009 | } |
7010 | |
7011 | inline bool Type::isSaturatedFixedPointType() const { |
7012 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7013 | return BT->getKind() >= BuiltinType::SatShortAccum && |
7014 | BT->getKind() <= BuiltinType::SatULongFract; |
7015 | } |
7016 | return false; |
7017 | } |
7018 | |
7019 | inline bool Type::isUnsaturatedFixedPointType() const { |
7020 | return isFixedPointType() && !isSaturatedFixedPointType(); |
7021 | } |
7022 | |
7023 | inline bool Type::isSignedFixedPointType() const { |
7024 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
7025 | return ((BT->getKind() >= BuiltinType::ShortAccum && |
7026 | BT->getKind() <= BuiltinType::LongAccum) || |
7027 | (BT->getKind() >= BuiltinType::ShortFract && |
7028 | BT->getKind() <= BuiltinType::LongFract) || |
7029 | (BT->getKind() >= BuiltinType::SatShortAccum && |
7030 | BT->getKind() <= BuiltinType::SatLongAccum) || |
7031 | (BT->getKind() >= BuiltinType::SatShortFract && |
7032 | BT->getKind() <= BuiltinType::SatLongFract)); |
7033 | } |
7034 | return false; |
7035 | } |
7036 | |
7037 | inline bool Type::isUnsignedFixedPointType() const { |
7038 | return isFixedPointType() && !isSignedFixedPointType(); |
7039 | } |
7040 | |
7041 | inline bool Type::isScalarType() const { |
7042 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7043 | return BT->getKind() > BuiltinType::Void && |
7044 | BT->getKind() <= BuiltinType::NullPtr; |
7045 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) |
7046 | // Enums are scalar types, but only if they are defined. Incomplete enums |
7047 | // are not treated as scalar types. |
7048 | return IsEnumDeclComplete(ET->getDecl()); |
7049 | return isa<PointerType>(CanonicalType) || |
7050 | isa<BlockPointerType>(CanonicalType) || |
7051 | isa<MemberPointerType>(CanonicalType) || |
7052 | isa<ComplexType>(CanonicalType) || |
7053 | isa<ObjCObjectPointerType>(CanonicalType) || |
7054 | isExtIntType(); |
7055 | } |
7056 | |
7057 | inline bool Type::isIntegralOrEnumerationType() const { |
7058 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7059 | return BT->getKind() >= BuiltinType::Bool && |
7060 | BT->getKind() <= BuiltinType::Int128; |
7061 | |
7062 | // Check for a complete enum type; incomplete enum types are not properly an |
7063 | // enumeration type in the sense required here. |
7064 | if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) |
7065 | return IsEnumDeclComplete(ET->getDecl()); |
7066 | |
7067 | return isExtIntType(); |
7068 | } |
7069 | |
7070 | inline bool Type::isBooleanType() const { |
7071 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
7072 | return BT->getKind() == BuiltinType::Bool; |
7073 | return false; |
7074 | } |
7075 | |
7076 | inline bool Type::isUndeducedType() const { |
7077 | auto *DT = getContainedDeducedType(); |
7078 | return DT && !DT->isDeduced(); |
7079 | } |
7080 | |
7081 | /// Determines whether this is a type for which one can define |
7082 | /// an overloaded operator. |
7083 | inline bool Type::isOverloadableType() const { |
7084 | return isDependentType() || isRecordType() || isEnumeralType(); |
7085 | } |
7086 | |
7087 | /// Determines whether this type is written as a typedef-name. |
7088 | inline bool Type::isTypedefNameType() const { |
7089 | if (getAs<TypedefType>()) |
7090 | return true; |
7091 | if (auto *TST = getAs<TemplateSpecializationType>()) |
7092 | return TST->isTypeAlias(); |
7093 | return false; |
7094 | } |
7095 | |
7096 | /// Determines whether this type can decay to a pointer type. |
7097 | inline bool Type::canDecayToPointerType() const { |
7098 | return isFunctionType() || isArrayType(); |
7099 | } |
7100 | |
7101 | inline bool Type::hasPointerRepresentation() const { |
7102 | return (isPointerType() || isReferenceType() || isBlockPointerType() || |
7103 | isObjCObjectPointerType() || isNullPtrType()); |
7104 | } |
7105 | |
7106 | inline bool Type::hasObjCPointerRepresentation() const { |
7107 | return isObjCObjectPointerType(); |
7108 | } |
7109 | |
7110 | inline const Type *Type::getBaseElementTypeUnsafe() const { |
7111 | const Type *type = this; |
7112 | while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) |
7113 | type = arrayType->getElementType().getTypePtr(); |
7114 | return type; |
7115 | } |
7116 | |
7117 | inline const Type *Type::getPointeeOrArrayElementType() const { |
7118 | const Type *type = this; |
7119 | if (type->isAnyPointerType()) |
7120 | return type->getPointeeType().getTypePtr(); |
7121 | else if (type->isArrayType()) |
7122 | return type->getBaseElementTypeUnsafe(); |
7123 | return type; |
7124 | } |
7125 | /// Insertion operator for partial diagnostics. This allows sending adress |
7126 | /// spaces into a diagnostic with <<. |
7127 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7128 | LangAS AS) { |
7129 | PD.AddTaggedVal(static_cast<std::underlying_type_t<LangAS>>(AS), |
7130 | DiagnosticsEngine::ArgumentKind::ak_addrspace); |
7131 | return PD; |
7132 | } |
7133 | |
7134 | /// Insertion operator for partial diagnostics. This allows sending Qualifiers |
7135 | /// into a diagnostic with <<. |
7136 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7137 | Qualifiers Q) { |
7138 | PD.AddTaggedVal(Q.getAsOpaqueValue(), |
7139 | DiagnosticsEngine::ArgumentKind::ak_qual); |
7140 | return PD; |
7141 | } |
7142 | |
7143 | /// Insertion operator for partial diagnostics. This allows sending QualType's |
7144 | /// into a diagnostic with <<. |
7145 | inline const StreamingDiagnostic &operator<<(const StreamingDiagnostic &PD, |
7146 | QualType T) { |
7147 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), |
7148 | DiagnosticsEngine::ak_qualtype); |
7149 | return PD; |
7150 | } |
7151 | |
7152 | // Helper class template that is used by Type::getAs to ensure that one does |
7153 | // not try to look through a qualified type to get to an array type. |
7154 | template <typename T> |
7155 | using TypeIsArrayType = |
7156 | std::integral_constant<bool, std::is_same<T, ArrayType>::value || |
7157 | std::is_base_of<ArrayType, T>::value>; |
7158 | |
7159 | // Member-template getAs<specific type>'. |
7160 | template <typename T> const T *Type::getAs() const { |
7161 | static_assert(!TypeIsArrayType<T>::value, |
7162 | "ArrayType cannot be used with getAs!"); |
7163 | |
7164 | // If this is directly a T type, return it. |
7165 | if (const auto *Ty = dyn_cast<T>(this)) |
7166 | return Ty; |
7167 | |
7168 | // If the canonical form of this type isn't the right kind, reject it. |
7169 | if (!isa<T>(CanonicalType)) |
7170 | return nullptr; |
7171 | |
7172 | // If this is a typedef for the type, strip the typedef off without |
7173 | // losing all typedef information. |
7174 | return cast<T>(getUnqualifiedDesugaredType()); |
7175 | } |
7176 | |
7177 | template <typename T> const T *Type::getAsAdjusted() const { |
7178 | static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!"); |
7179 | |
7180 | // If this is directly a T type, return it. |
7181 | if (const auto *Ty = dyn_cast<T>(this)) |
7182 | return Ty; |
7183 | |
7184 | // If the canonical form of this type isn't the right kind, reject it. |
7185 | if (!isa<T>(CanonicalType)) |
7186 | return nullptr; |
7187 | |
7188 | // Strip off type adjustments that do not modify the underlying nature of the |
7189 | // type. |
7190 | const Type *Ty = this; |
7191 | while (Ty) { |
7192 | if (const auto *A = dyn_cast<AttributedType>(Ty)) |
7193 | Ty = A->getModifiedType().getTypePtr(); |
7194 | else if (const auto *E = dyn_cast<ElaboratedType>(Ty)) |
7195 | Ty = E->desugar().getTypePtr(); |
7196 | else if (const auto *P = dyn_cast<ParenType>(Ty)) |
7197 | Ty = P->desugar().getTypePtr(); |
7198 | else if (const auto *A = dyn_cast<AdjustedType>(Ty)) |
7199 | Ty = A->desugar().getTypePtr(); |
7200 | else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty)) |
7201 | Ty = M->desugar().getTypePtr(); |
7202 | else |
7203 | break; |
7204 | } |
7205 | |
7206 | // Just because the canonical type is correct does not mean we can use cast<>, |
7207 | // since we may not have stripped off all the sugar down to the base type. |
7208 | return dyn_cast<T>(Ty); |
7209 | } |
7210 | |
7211 | inline const ArrayType *Type::getAsArrayTypeUnsafe() const { |
7212 | // If this is directly an array type, return it. |
7213 | if (const auto *arr = dyn_cast<ArrayType>(this)) |
7214 | return arr; |
7215 | |
7216 | // If the canonical form of this type isn't the right kind, reject it. |
7217 | if (!isa<ArrayType>(CanonicalType)) |
7218 | return nullptr; |
7219 | |
7220 | // If this is a typedef for the type, strip the typedef off without |
7221 | // losing all typedef information. |
7222 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
7223 | } |
7224 | |
7225 | template <typename T> const T *Type::castAs() const { |
7226 | static_assert(!TypeIsArrayType<T>::value, |
7227 | "ArrayType cannot be used with castAs!"); |
7228 | |
7229 | if (const auto *ty = dyn_cast<T>(this)) return ty; |
7230 | assert(isa<T>(CanonicalType))(static_cast <bool> (isa<T>(CanonicalType)) ? void (0) : __assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 7230, __extension__ __PRETTY_FUNCTION__)); |
7231 | return cast<T>(getUnqualifiedDesugaredType()); |
7232 | } |
7233 | |
7234 | inline const ArrayType *Type::castAsArrayTypeUnsafe() const { |
7235 | assert(isa<ArrayType>(CanonicalType))(static_cast <bool> (isa<ArrayType>(CanonicalType )) ? void (0) : __assert_fail ("isa<ArrayType>(CanonicalType)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 7235, __extension__ __PRETTY_FUNCTION__)); |
7236 | if (const auto *arr = dyn_cast<ArrayType>(this)) return arr; |
7237 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
7238 | } |
7239 | |
7240 | DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr, |
7241 | QualType CanonicalPtr) |
7242 | : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) { |
7243 | #ifndef NDEBUG |
7244 | QualType Adjusted = getAdjustedType(); |
7245 | (void)AttributedType::stripOuterNullability(Adjusted); |
7246 | assert(isa<PointerType>(Adjusted))(static_cast <bool> (isa<PointerType>(Adjusted)) ? void (0) : __assert_fail ("isa<PointerType>(Adjusted)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/clang/include/clang/AST/Type.h" , 7246, __extension__ __PRETTY_FUNCTION__)); |
7247 | #endif |
7248 | } |
7249 | |
7250 | QualType DecayedType::getPointeeType() const { |
7251 | QualType Decayed = getDecayedType(); |
7252 | (void)AttributedType::stripOuterNullability(Decayed); |
7253 | return cast<PointerType>(Decayed)->getPointeeType(); |
7254 | } |
7255 | |
7256 | // Get the decimal string representation of a fixed point type, represented |
7257 | // as a scaled integer. |
7258 | // TODO: At some point, we should change the arguments to instead just accept an |
7259 | // APFixedPoint instead of APSInt and scale. |
7260 | void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val, |
7261 | unsigned Scale); |
7262 | |
7263 | } // namespace clang |
7264 | |
7265 | #endif // LLVM_CLANG_AST_TYPE_H |
1 | //===- llvm/ADT/PointerUnion.h - Discriminated Union of 2 Ptrs --*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This file defines the PointerUnion class, which is a discriminated union of |
10 | // pointer types. |
11 | // |
12 | //===----------------------------------------------------------------------===// |
13 | |
14 | #ifndef LLVM_ADT_POINTERUNION_H |
15 | #define LLVM_ADT_POINTERUNION_H |
16 | |
17 | #include "llvm/ADT/DenseMapInfo.h" |
18 | #include "llvm/ADT/PointerIntPair.h" |
19 | #include "llvm/Support/PointerLikeTypeTraits.h" |
20 | #include <cassert> |
21 | #include <cstddef> |
22 | #include <cstdint> |
23 | |
24 | namespace llvm { |
25 | |
26 | template <typename T> struct PointerUnionTypeSelectorReturn { |
27 | using Return = T; |
28 | }; |
29 | |
30 | /// Get a type based on whether two types are the same or not. |
31 | /// |
32 | /// For: |
33 | /// |
34 | /// \code |
35 | /// using Ret = typename PointerUnionTypeSelector<T1, T2, EQ, NE>::Return; |
36 | /// \endcode |
37 | /// |
38 | /// Ret will be EQ type if T1 is same as T2 or NE type otherwise. |
39 | template <typename T1, typename T2, typename RET_EQ, typename RET_NE> |
40 | struct PointerUnionTypeSelector { |
41 | using Return = typename PointerUnionTypeSelectorReturn<RET_NE>::Return; |
42 | }; |
43 | |
44 | template <typename T, typename RET_EQ, typename RET_NE> |
45 | struct PointerUnionTypeSelector<T, T, RET_EQ, RET_NE> { |
46 | using Return = typename PointerUnionTypeSelectorReturn<RET_EQ>::Return; |
47 | }; |
48 | |
49 | template <typename T1, typename T2, typename RET_EQ, typename RET_NE> |
50 | struct PointerUnionTypeSelectorReturn< |
51 | PointerUnionTypeSelector<T1, T2, RET_EQ, RET_NE>> { |
52 | using Return = |
53 | typename PointerUnionTypeSelector<T1, T2, RET_EQ, RET_NE>::Return; |
54 | }; |
55 | |
56 | namespace pointer_union_detail { |
57 | /// Determine the number of bits required to store integers with values < n. |
58 | /// This is ceil(log2(n)). |
59 | constexpr int bitsRequired(unsigned n) { |
60 | return n > 1 ? 1 + bitsRequired((n + 1) / 2) : 0; |
61 | } |
62 | |
63 | template <typename... Ts> constexpr int lowBitsAvailable() { |
64 | return std::min<int>({PointerLikeTypeTraits<Ts>::NumLowBitsAvailable...}); |
65 | } |
66 | |
67 | /// Find the index of a type in a list of types. TypeIndex<T, Us...>::Index |
68 | /// is the index of T in Us, or sizeof...(Us) if T does not appear in the |
69 | /// list. |
70 | template <typename T, typename ...Us> struct TypeIndex; |
71 | template <typename T, typename ...Us> struct TypeIndex<T, T, Us...> { |
72 | static constexpr int Index = 0; |
73 | }; |
74 | template <typename T, typename U, typename... Us> |
75 | struct TypeIndex<T, U, Us...> { |
76 | static constexpr int Index = 1 + TypeIndex<T, Us...>::Index; |
77 | }; |
78 | template <typename T> struct TypeIndex<T> { |
79 | static constexpr int Index = 0; |
80 | }; |
81 | |
82 | /// Find the first type in a list of types. |
83 | template <typename T, typename...> struct GetFirstType { |
84 | using type = T; |
85 | }; |
86 | |
87 | /// Provide PointerLikeTypeTraits for void* that is used by PointerUnion |
88 | /// for the template arguments. |
89 | template <typename ...PTs> class PointerUnionUIntTraits { |
90 | public: |
91 | static inline void *getAsVoidPointer(void *P) { return P; } |
92 | static inline void *getFromVoidPointer(void *P) { return P; } |
93 | static constexpr int NumLowBitsAvailable = lowBitsAvailable<PTs...>(); |
94 | }; |
95 | |
96 | template <typename Derived, typename ValTy, int I, typename ...Types> |
97 | class PointerUnionMembers; |
98 | |
99 | template <typename Derived, typename ValTy, int I> |
100 | class PointerUnionMembers<Derived, ValTy, I> { |
101 | protected: |
102 | ValTy Val; |
103 | PointerUnionMembers() = default; |
104 | PointerUnionMembers(ValTy Val) : Val(Val) {} |
105 | |
106 | friend struct PointerLikeTypeTraits<Derived>; |
107 | }; |
108 | |
109 | template <typename Derived, typename ValTy, int I, typename Type, |
110 | typename ...Types> |
111 | class PointerUnionMembers<Derived, ValTy, I, Type, Types...> |
112 | : public PointerUnionMembers<Derived, ValTy, I + 1, Types...> { |
113 | using Base = PointerUnionMembers<Derived, ValTy, I + 1, Types...>; |
114 | public: |
115 | using Base::Base; |
116 | PointerUnionMembers() = default; |
117 | PointerUnionMembers(Type V) |
118 | : Base(ValTy(const_cast<void *>( |
119 | PointerLikeTypeTraits<Type>::getAsVoidPointer(V)), |
120 | I)) {} |
121 | |
122 | using Base::operator=; |
123 | Derived &operator=(Type V) { |
124 | this->Val = ValTy( |
125 | const_cast<void *>(PointerLikeTypeTraits<Type>::getAsVoidPointer(V)), |
126 | I); |
127 | return static_cast<Derived &>(*this); |
128 | }; |
129 | }; |
130 | } |
131 | |
132 | /// A discriminated union of two or more pointer types, with the discriminator |
133 | /// in the low bit of the pointer. |
134 | /// |
135 | /// This implementation is extremely efficient in space due to leveraging the |
136 | /// low bits of the pointer, while exposing a natural and type-safe API. |
137 | /// |
138 | /// Common use patterns would be something like this: |
139 | /// PointerUnion<int*, float*> P; |
140 | /// P = (int*)0; |
141 | /// printf("%d %d", P.is<int*>(), P.is<float*>()); // prints "1 0" |
142 | /// X = P.get<int*>(); // ok. |
143 | /// Y = P.get<float*>(); // runtime assertion failure. |
144 | /// Z = P.get<double*>(); // compile time failure. |
145 | /// P = (float*)0; |
146 | /// Y = P.get<float*>(); // ok. |
147 | /// X = P.get<int*>(); // runtime assertion failure. |
148 | template <typename... PTs> |
149 | class PointerUnion |
150 | : public pointer_union_detail::PointerUnionMembers< |
151 | PointerUnion<PTs...>, |
152 | PointerIntPair< |
153 | void *, pointer_union_detail::bitsRequired(sizeof...(PTs)), int, |
154 | pointer_union_detail::PointerUnionUIntTraits<PTs...>>, |
155 | 0, PTs...> { |
156 | // The first type is special because we want to directly cast a pointer to a |
157 | // default-initialized union to a pointer to the first type. But we don't |
158 | // want PointerUnion to be a 'template <typename First, typename ...Rest>' |
159 | // because it's much more convenient to have a name for the whole pack. So |
160 | // split off the first type here. |
161 | using First = typename pointer_union_detail::GetFirstType<PTs...>::type; |
162 | using Base = typename PointerUnion::PointerUnionMembers; |
163 | |
164 | public: |
165 | PointerUnion() = default; |
166 | |
167 | PointerUnion(std::nullptr_t) : PointerUnion() {} |
168 | using Base::Base; |
169 | |
170 | /// Test if the pointer held in the union is null, regardless of |
171 | /// which type it is. |
172 | bool isNull() const { return !this->Val.getPointer(); } |
173 | |
174 | explicit operator bool() const { return !isNull(); } |
175 | |
176 | /// Test if the Union currently holds the type matching T. |
177 | template <typename T> bool is() const { |
178 | constexpr int Index = pointer_union_detail::TypeIndex<T, PTs...>::Index; |
179 | static_assert(Index < sizeof...(PTs), |
180 | "PointerUnion::is<T> given type not in the union"); |
181 | return this->Val.getInt() == Index; |
182 | } |
183 | |
184 | /// Returns the value of the specified pointer type. |
185 | /// |
186 | /// If the specified pointer type is incorrect, assert. |
187 | template <typename T> T get() const { |
188 | assert(is<T>() && "Invalid accessor called")(static_cast <bool> (is<T>() && "Invalid accessor called" ) ? void (0) : __assert_fail ("is<T>() && \"Invalid accessor called\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/include/llvm/ADT/PointerUnion.h" , 188, __extension__ __PRETTY_FUNCTION__)); |
189 | return PointerLikeTypeTraits<T>::getFromVoidPointer(this->Val.getPointer()); |
190 | } |
191 | |
192 | /// Returns the current pointer if it is of the specified pointer type, |
193 | /// otherwise returns null. |
194 | template <typename T> T dyn_cast() const { |
195 | if (is<T>()) |
196 | return get<T>(); |
197 | return T(); |
198 | } |
199 | |
200 | /// If the union is set to the first pointer type get an address pointing to |
201 | /// it. |
202 | First const *getAddrOfPtr1() const { |
203 | return const_cast<PointerUnion *>(this)->getAddrOfPtr1(); |
204 | } |
205 | |
206 | /// If the union is set to the first pointer type get an address pointing to |
207 | /// it. |
208 | First *getAddrOfPtr1() { |
209 | assert(is<First>() && "Val is not the first pointer")(static_cast <bool> (is<First>() && "Val is not the first pointer" ) ? void (0) : __assert_fail ("is<First>() && \"Val is not the first pointer\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/include/llvm/ADT/PointerUnion.h" , 209, __extension__ __PRETTY_FUNCTION__)); |
210 | assert((static_cast <bool> (PointerLikeTypeTraits<First> ::getAsVoidPointer(get<First>()) == this->Val.getPointer () && "Can't get the address because PointerLikeTypeTraits changes the ptr" ) ? void (0) : __assert_fail ("PointerLikeTypeTraits<First>::getAsVoidPointer(get<First>()) == this->Val.getPointer() && \"Can't get the address because PointerLikeTypeTraits changes the ptr\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/include/llvm/ADT/PointerUnion.h" , 213, __extension__ __PRETTY_FUNCTION__)) |
211 | PointerLikeTypeTraits<First>::getAsVoidPointer(get<First>()) ==(static_cast <bool> (PointerLikeTypeTraits<First> ::getAsVoidPointer(get<First>()) == this->Val.getPointer () && "Can't get the address because PointerLikeTypeTraits changes the ptr" ) ? void (0) : __assert_fail ("PointerLikeTypeTraits<First>::getAsVoidPointer(get<First>()) == this->Val.getPointer() && \"Can't get the address because PointerLikeTypeTraits changes the ptr\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/include/llvm/ADT/PointerUnion.h" , 213, __extension__ __PRETTY_FUNCTION__)) |
212 | this->Val.getPointer() &&(static_cast <bool> (PointerLikeTypeTraits<First> ::getAsVoidPointer(get<First>()) == this->Val.getPointer () && "Can't get the address because PointerLikeTypeTraits changes the ptr" ) ? void (0) : __assert_fail ("PointerLikeTypeTraits<First>::getAsVoidPointer(get<First>()) == this->Val.getPointer() && \"Can't get the address because PointerLikeTypeTraits changes the ptr\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/include/llvm/ADT/PointerUnion.h" , 213, __extension__ __PRETTY_FUNCTION__)) |
213 | "Can't get the address because PointerLikeTypeTraits changes the ptr")(static_cast <bool> (PointerLikeTypeTraits<First> ::getAsVoidPointer(get<First>()) == this->Val.getPointer () && "Can't get the address because PointerLikeTypeTraits changes the ptr" ) ? void (0) : __assert_fail ("PointerLikeTypeTraits<First>::getAsVoidPointer(get<First>()) == this->Val.getPointer() && \"Can't get the address because PointerLikeTypeTraits changes the ptr\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/include/llvm/ADT/PointerUnion.h" , 213, __extension__ __PRETTY_FUNCTION__)); |
214 | return const_cast<First *>( |
215 | reinterpret_cast<const First *>(this->Val.getAddrOfPointer())); |
216 | } |
217 | |
218 | /// Assignment from nullptr which just clears the union. |
219 | const PointerUnion &operator=(std::nullptr_t) { |
220 | this->Val.initWithPointer(nullptr); |
221 | return *this; |
222 | } |
223 | |
224 | /// Assignment from elements of the union. |
225 | using Base::operator=; |
226 | |
227 | void *getOpaqueValue() const { return this->Val.getOpaqueValue(); } |
228 | static inline PointerUnion getFromOpaqueValue(void *VP) { |
229 | PointerUnion V; |
230 | V.Val = decltype(V.Val)::getFromOpaqueValue(VP); |
231 | return V; |
232 | } |
233 | }; |
234 | |
235 | template <typename ...PTs> |
236 | bool operator==(PointerUnion<PTs...> lhs, PointerUnion<PTs...> rhs) { |
237 | return lhs.getOpaqueValue() == rhs.getOpaqueValue(); |
238 | } |
239 | |
240 | template <typename ...PTs> |
241 | bool operator!=(PointerUnion<PTs...> lhs, PointerUnion<PTs...> rhs) { |
242 | return lhs.getOpaqueValue() != rhs.getOpaqueValue(); |
243 | } |
244 | |
245 | template <typename ...PTs> |
246 | bool operator<(PointerUnion<PTs...> lhs, PointerUnion<PTs...> rhs) { |
247 | return lhs.getOpaqueValue() < rhs.getOpaqueValue(); |
248 | } |
249 | |
250 | // Teach SmallPtrSet that PointerUnion is "basically a pointer", that has |
251 | // # low bits available = min(PT1bits,PT2bits)-1. |
252 | template <typename ...PTs> |
253 | struct PointerLikeTypeTraits<PointerUnion<PTs...>> { |
254 | static inline void *getAsVoidPointer(const PointerUnion<PTs...> &P) { |
255 | return P.getOpaqueValue(); |
256 | } |
257 | |
258 | static inline PointerUnion<PTs...> getFromVoidPointer(void *P) { |
259 | return PointerUnion<PTs...>::getFromOpaqueValue(P); |
260 | } |
261 | |
262 | // The number of bits available are the min of the pointer types minus the |
263 | // bits needed for the discriminator. |
264 | static constexpr int NumLowBitsAvailable = PointerLikeTypeTraits<decltype( |
265 | PointerUnion<PTs...>::Val)>::NumLowBitsAvailable; |
266 | }; |
267 | |
268 | // Teach DenseMap how to use PointerUnions as keys. |
269 | template <typename ...PTs> struct DenseMapInfo<PointerUnion<PTs...>> { |
270 | using Union = PointerUnion<PTs...>; |
271 | using FirstInfo = |
272 | DenseMapInfo<typename pointer_union_detail::GetFirstType<PTs...>::type>; |
273 | |
274 | static inline Union getEmptyKey() { return Union(FirstInfo::getEmptyKey()); } |
275 | |
276 | static inline Union getTombstoneKey() { |
277 | return Union(FirstInfo::getTombstoneKey()); |
278 | } |
279 | |
280 | static unsigned getHashValue(const Union &UnionVal) { |
281 | intptr_t key = (intptr_t)UnionVal.getOpaqueValue(); |
282 | return DenseMapInfo<intptr_t>::getHashValue(key); |
283 | } |
284 | |
285 | static bool isEqual(const Union &LHS, const Union &RHS) { |
286 | return LHS == RHS; |
287 | } |
288 | }; |
289 | |
290 | } // end namespace llvm |
291 | |
292 | #endif // LLVM_ADT_POINTERUNION_H |