File: | clang/lib/Sema/SemaDeclCXX.cpp |
Warning: | line 1340, column 25 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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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
| ||||
1489 | if (checkArrayDecomposition(*this, Bindings, DD, DecompType, CAT)) | ||||
1490 | DD->setInvalidDecl(); | ||||
1491 | return; | ||||
1492 | } | ||||
1493 | if (auto *VT
| ||||
1494 | if (checkVectorDecomposition(*this, Bindings, DD, DecompType, VT)) | ||||
1495 | DD->setInvalidDecl(); | ||||
1496 | return; | ||||
1497 | } | ||||
1498 | if (auto *CT
| ||||
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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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-14~++20210828111110+16086d47c0d0/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, /*InitDecl=*/nullptr, | ||||
4166 | /*RecoverUncorrectedTypos=*/true); | ||||
4167 | if (!Res.isUsable()) | ||||
4168 | return true; | ||||
4169 | Init = Res.get(); | ||||
4170 | |||||
4171 | if (!ConstructorD) | ||||
4172 | return true; | ||||
4173 | |||||
4174 | AdjustDeclIfTemplate(ConstructorD); | ||||
4175 | |||||
4176 | CXXConstructorDecl *Constructor | ||||
4177 | = dyn_cast<CXXConstructorDecl>(ConstructorD); | ||||
4178 | if (!Constructor) { | ||||
4179 | // The user wrote a constructor initializer on a function that is | ||||
4180 | // not a C++ constructor. Ignore the error for now, because we may | ||||
4181 | // have more member initializers coming; we'll diagnose it just | ||||
4182 | // once in ActOnMemInitializers. | ||||
4183 | return true; | ||||
4184 | } | ||||
4185 | |||||
4186 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||
4187 | |||||
4188 | // C++ [class.base.init]p2: | ||||
4189 | // Names in a mem-initializer-id are looked up in the scope of the | ||||
4190 | // constructor's class and, if not found in that scope, are looked | ||||
4191 | // up in the scope containing the constructor's definition. | ||||
4192 | // [Note: if the constructor's class contains a member with the | ||||
4193 | // same name as a direct or virtual base class of the class, a | ||||
4194 | // mem-initializer-id naming the member or base class and composed | ||||
4195 | // of a single identifier refers to the class member. A | ||||
4196 | // mem-initializer-id for the hidden base class may be specified | ||||
4197 | // using a qualified name. ] | ||||
4198 | |||||
4199 | // Look for a member, first. | ||||
4200 | if (ValueDecl *Member = tryLookupCtorInitMemberDecl( | ||||
4201 | ClassDecl, SS, TemplateTypeTy, MemberOrBase)) { | ||||
4202 | if (EllipsisLoc.isValid()) | ||||
4203 | Diag(EllipsisLoc, diag::err_pack_expansion_member_init) | ||||
4204 | << MemberOrBase | ||||
4205 | << SourceRange(IdLoc, Init->getSourceRange().getEnd()); | ||||
4206 | |||||
4207 | return BuildMemberInitializer(Member, Init, IdLoc); | ||||
4208 | } | ||||
4209 | // It didn't name a member, so see if it names a class. | ||||
4210 | QualType BaseType; | ||||
4211 | TypeSourceInfo *TInfo = nullptr; | ||||
4212 | |||||
4213 | if (TemplateTypeTy) { | ||||
4214 | BaseType = GetTypeFromParser(TemplateTypeTy, &TInfo); | ||||
4215 | if (BaseType.isNull()) | ||||
4216 | return true; | ||||
4217 | } else if (DS.getTypeSpecType() == TST_decltype) { | ||||
4218 | BaseType = BuildDecltypeType(DS.getRepAsExpr(), DS.getTypeSpecTypeLoc()); | ||||
4219 | } else if (DS.getTypeSpecType() == TST_decltype_auto) { | ||||
4220 | Diag(DS.getTypeSpecTypeLoc(), diag::err_decltype_auto_invalid); | ||||
4221 | return true; | ||||
4222 | } else { | ||||
4223 | LookupResult R(*this, MemberOrBase, IdLoc, LookupOrdinaryName); | ||||
4224 | LookupParsedName(R, S, &SS); | ||||
4225 | |||||
4226 | TypeDecl *TyD = R.getAsSingle<TypeDecl>(); | ||||
4227 | if (!TyD) { | ||||
4228 | if (R.isAmbiguous()) return true; | ||||
4229 | |||||
4230 | // We don't want access-control diagnostics here. | ||||
4231 | R.suppressDiagnostics(); | ||||
4232 | |||||
4233 | if (SS.isSet() && isDependentScopeSpecifier(SS)) { | ||||
4234 | bool NotUnknownSpecialization = false; | ||||
4235 | DeclContext *DC = computeDeclContext(SS, false); | ||||
4236 | if (CXXRecordDecl *Record = dyn_cast_or_null<CXXRecordDecl>(DC)) | ||||
4237 | NotUnknownSpecialization = !Record->hasAnyDependentBases(); | ||||
4238 | |||||
4239 | if (!NotUnknownSpecialization) { | ||||
4240 | // When the scope specifier can refer to a member of an unknown | ||||
4241 | // specialization, we take it as a type name. | ||||
4242 | BaseType = CheckTypenameType(ETK_None, SourceLocation(), | ||||
4243 | SS.getWithLocInContext(Context), | ||||
4244 | *MemberOrBase, IdLoc); | ||||
4245 | if (BaseType.isNull()) | ||||
4246 | return true; | ||||
4247 | |||||
4248 | TInfo = Context.CreateTypeSourceInfo(BaseType); | ||||
4249 | DependentNameTypeLoc TL = | ||||
4250 | TInfo->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||
4251 | if (!TL.isNull()) { | ||||
4252 | TL.setNameLoc(IdLoc); | ||||
4253 | TL.setElaboratedKeywordLoc(SourceLocation()); | ||||
4254 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||
4255 | } | ||||
4256 | |||||
4257 | R.clear(); | ||||
4258 | R.setLookupName(MemberOrBase); | ||||
4259 | } | ||||
4260 | } | ||||
4261 | |||||
4262 | // If no results were found, try to correct typos. | ||||
4263 | TypoCorrection Corr; | ||||
4264 | MemInitializerValidatorCCC CCC(ClassDecl); | ||||
4265 | if (R.empty() && BaseType.isNull() && | ||||
4266 | (Corr = CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), S, &SS, | ||||
4267 | CCC, CTK_ErrorRecovery, ClassDecl))) { | ||||
4268 | if (FieldDecl *Member = Corr.getCorrectionDeclAs<FieldDecl>()) { | ||||
4269 | // We have found a non-static data member with a similar | ||||
4270 | // name to what was typed; complain and initialize that | ||||
4271 | // member. | ||||
4272 | diagnoseTypo(Corr, | ||||
4273 | PDiag(diag::err_mem_init_not_member_or_class_suggest) | ||||
4274 | << MemberOrBase << true); | ||||
4275 | return BuildMemberInitializer(Member, Init, IdLoc); | ||||
4276 | } else if (TypeDecl *Type = Corr.getCorrectionDeclAs<TypeDecl>()) { | ||||
4277 | const CXXBaseSpecifier *DirectBaseSpec; | ||||
4278 | const CXXBaseSpecifier *VirtualBaseSpec; | ||||
4279 | if (FindBaseInitializer(*this, ClassDecl, | ||||
4280 | Context.getTypeDeclType(Type), | ||||
4281 | DirectBaseSpec, VirtualBaseSpec)) { | ||||
4282 | // We have found a direct or virtual base class with a | ||||
4283 | // similar name to what was typed; complain and initialize | ||||
4284 | // that base class. | ||||
4285 | diagnoseTypo(Corr, | ||||
4286 | PDiag(diag::err_mem_init_not_member_or_class_suggest) | ||||
4287 | << MemberOrBase << false, | ||||
4288 | PDiag() /*Suppress note, we provide our own.*/); | ||||
4289 | |||||
4290 | const CXXBaseSpecifier *BaseSpec = DirectBaseSpec ? DirectBaseSpec | ||||
4291 | : VirtualBaseSpec; | ||||
4292 | Diag(BaseSpec->getBeginLoc(), diag::note_base_class_specified_here) | ||||
4293 | << BaseSpec->getType() << BaseSpec->getSourceRange(); | ||||
4294 | |||||
4295 | TyD = Type; | ||||
4296 | } | ||||
4297 | } | ||||
4298 | } | ||||
4299 | |||||
4300 | if (!TyD && BaseType.isNull()) { | ||||
4301 | Diag(IdLoc, diag::err_mem_init_not_member_or_class) | ||||
4302 | << MemberOrBase << SourceRange(IdLoc,Init->getSourceRange().getEnd()); | ||||
4303 | return true; | ||||
4304 | } | ||||
4305 | } | ||||
4306 | |||||
4307 | if (BaseType.isNull()) { | ||||
4308 | BaseType = Context.getTypeDeclType(TyD); | ||||
4309 | MarkAnyDeclReferenced(TyD->getLocation(), TyD, /*OdrUse=*/false); | ||||
4310 | if (SS.isSet()) { | ||||
4311 | BaseType = Context.getElaboratedType(ETK_None, SS.getScopeRep(), | ||||
4312 | BaseType); | ||||
4313 | TInfo = Context.CreateTypeSourceInfo(BaseType); | ||||
4314 | ElaboratedTypeLoc TL = TInfo->getTypeLoc().castAs<ElaboratedTypeLoc>(); | ||||
4315 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(IdLoc); | ||||
4316 | TL.setElaboratedKeywordLoc(SourceLocation()); | ||||
4317 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||
4318 | } | ||||
4319 | } | ||||
4320 | } | ||||
4321 | |||||
4322 | if (!TInfo) | ||||
4323 | TInfo = Context.getTrivialTypeSourceInfo(BaseType, IdLoc); | ||||
4324 | |||||
4325 | return BuildBaseInitializer(BaseType, TInfo, Init, ClassDecl, EllipsisLoc); | ||||
4326 | } | ||||
4327 | |||||
4328 | MemInitResult | ||||
4329 | Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init, | ||||
4330 | SourceLocation IdLoc) { | ||||
4331 | FieldDecl *DirectMember = dyn_cast<FieldDecl>(Member); | ||||
4332 | IndirectFieldDecl *IndirectMember = dyn_cast<IndirectFieldDecl>(Member); | ||||
4333 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 4334, __extension__ __PRETTY_FUNCTION__)) | ||||
4334 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 4334, __extension__ __PRETTY_FUNCTION__)); | ||||
4335 | |||||
4336 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) | ||||
4337 | return true; | ||||
4338 | |||||
4339 | if (Member->isInvalidDecl()) | ||||
4340 | return true; | ||||
4341 | |||||
4342 | MultiExprArg Args; | ||||
4343 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||
4344 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||
4345 | } else if (InitListExpr *InitList = dyn_cast<InitListExpr>(Init)) { | ||||
4346 | Args = MultiExprArg(InitList->getInits(), InitList->getNumInits()); | ||||
4347 | } else { | ||||
4348 | // Template instantiation doesn't reconstruct ParenListExprs for us. | ||||
4349 | Args = Init; | ||||
4350 | } | ||||
4351 | |||||
4352 | SourceRange InitRange = Init->getSourceRange(); | ||||
4353 | |||||
4354 | if (Member->getType()->isDependentType() || Init->isTypeDependent()) { | ||||
4355 | // Can't check initialization for a member of dependent type or when | ||||
4356 | // any of the arguments are type-dependent expressions. | ||||
4357 | DiscardCleanupsInEvaluationContext(); | ||||
4358 | } else { | ||||
4359 | bool InitList = false; | ||||
4360 | if (isa<InitListExpr>(Init)) { | ||||
4361 | InitList = true; | ||||
4362 | Args = Init; | ||||
4363 | } | ||||
4364 | |||||
4365 | // Initialize the member. | ||||
4366 | InitializedEntity MemberEntity = | ||||
4367 | DirectMember ? InitializedEntity::InitializeMember(DirectMember, nullptr) | ||||
4368 | : InitializedEntity::InitializeMember(IndirectMember, | ||||
4369 | nullptr); | ||||
4370 | InitializationKind Kind = | ||||
4371 | InitList ? InitializationKind::CreateDirectList( | ||||
4372 | IdLoc, Init->getBeginLoc(), Init->getEndLoc()) | ||||
4373 | : InitializationKind::CreateDirect(IdLoc, InitRange.getBegin(), | ||||
4374 | InitRange.getEnd()); | ||||
4375 | |||||
4376 | InitializationSequence InitSeq(*this, MemberEntity, Kind, Args); | ||||
4377 | ExprResult MemberInit = InitSeq.Perform(*this, MemberEntity, Kind, Args, | ||||
4378 | nullptr); | ||||
4379 | if (!MemberInit.isInvalid()) { | ||||
4380 | // C++11 [class.base.init]p7: | ||||
4381 | // The initialization of each base and member constitutes a | ||||
4382 | // full-expression. | ||||
4383 | MemberInit = ActOnFinishFullExpr(MemberInit.get(), InitRange.getBegin(), | ||||
4384 | /*DiscardedValue*/ false); | ||||
4385 | } | ||||
4386 | |||||
4387 | if (MemberInit.isInvalid()) { | ||||
4388 | // Args were sensible expressions but we couldn't initialize the member | ||||
4389 | // from them. Preserve them in a RecoveryExpr instead. | ||||
4390 | Init = CreateRecoveryExpr(InitRange.getBegin(), InitRange.getEnd(), Args, | ||||
4391 | Member->getType()) | ||||
4392 | .get(); | ||||
4393 | if (!Init) | ||||
4394 | return true; | ||||
4395 | } else { | ||||
4396 | Init = MemberInit.get(); | ||||
4397 | } | ||||
4398 | } | ||||
4399 | |||||
4400 | if (DirectMember) { | ||||
4401 | return new (Context) CXXCtorInitializer(Context, DirectMember, IdLoc, | ||||
4402 | InitRange.getBegin(), Init, | ||||
4403 | InitRange.getEnd()); | ||||
4404 | } else { | ||||
4405 | return new (Context) CXXCtorInitializer(Context, IndirectMember, IdLoc, | ||||
4406 | InitRange.getBegin(), Init, | ||||
4407 | InitRange.getEnd()); | ||||
4408 | } | ||||
4409 | } | ||||
4410 | |||||
4411 | MemInitResult | ||||
4412 | Sema::BuildDelegatingInitializer(TypeSourceInfo *TInfo, Expr *Init, | ||||
4413 | CXXRecordDecl *ClassDecl) { | ||||
4414 | SourceLocation NameLoc = TInfo->getTypeLoc().getLocalSourceRange().getBegin(); | ||||
4415 | if (!LangOpts.CPlusPlus11) | ||||
4416 | return Diag(NameLoc, diag::err_delegating_ctor) | ||||
4417 | << TInfo->getTypeLoc().getLocalSourceRange(); | ||||
4418 | Diag(NameLoc, diag::warn_cxx98_compat_delegating_ctor); | ||||
4419 | |||||
4420 | bool InitList = true; | ||||
4421 | MultiExprArg Args = Init; | ||||
4422 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||
4423 | InitList = false; | ||||
4424 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||
4425 | } | ||||
4426 | |||||
4427 | SourceRange InitRange = Init->getSourceRange(); | ||||
4428 | // Initialize the object. | ||||
4429 | InitializedEntity DelegationEntity = InitializedEntity::InitializeDelegation( | ||||
4430 | QualType(ClassDecl->getTypeForDecl(), 0)); | ||||
4431 | InitializationKind Kind = | ||||
4432 | InitList ? InitializationKind::CreateDirectList( | ||||
4433 | NameLoc, Init->getBeginLoc(), Init->getEndLoc()) | ||||
4434 | : InitializationKind::CreateDirect(NameLoc, InitRange.getBegin(), | ||||
4435 | InitRange.getEnd()); | ||||
4436 | InitializationSequence InitSeq(*this, DelegationEntity, Kind, Args); | ||||
4437 | ExprResult DelegationInit = InitSeq.Perform(*this, DelegationEntity, Kind, | ||||
4438 | Args, nullptr); | ||||
4439 | if (!DelegationInit.isInvalid()) { | ||||
4440 | assert((DelegationInit.get()->containsErrors() ||(static_cast <bool> ((DelegationInit.get()->containsErrors () || cast<CXXConstructExpr>(DelegationInit.get())-> getConstructor()) && "Delegating constructor with no target?" ) ? void (0) : __assert_fail ("(DelegationInit.get()->containsErrors() || cast<CXXConstructExpr>(DelegationInit.get())->getConstructor()) && \"Delegating constructor with no target?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 4442, __extension__ __PRETTY_FUNCTION__)) | ||||
4441 | cast<CXXConstructExpr>(DelegationInit.get())->getConstructor()) &&(static_cast <bool> ((DelegationInit.get()->containsErrors () || cast<CXXConstructExpr>(DelegationInit.get())-> getConstructor()) && "Delegating constructor with no target?" ) ? void (0) : __assert_fail ("(DelegationInit.get()->containsErrors() || cast<CXXConstructExpr>(DelegationInit.get())->getConstructor()) && \"Delegating constructor with no target?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 4442, __extension__ __PRETTY_FUNCTION__)) | ||||
4442 | "Delegating constructor with no target?")(static_cast <bool> ((DelegationInit.get()->containsErrors () || cast<CXXConstructExpr>(DelegationInit.get())-> getConstructor()) && "Delegating constructor with no target?" ) ? void (0) : __assert_fail ("(DelegationInit.get()->containsErrors() || cast<CXXConstructExpr>(DelegationInit.get())->getConstructor()) && \"Delegating constructor with no target?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 4442, __extension__ __PRETTY_FUNCTION__)); | ||||
4443 | |||||
4444 | // C++11 [class.base.init]p7: | ||||
4445 | // The initialization of each base and member constitutes a | ||||
4446 | // full-expression. | ||||
4447 | DelegationInit = ActOnFinishFullExpr( | ||||
4448 | DelegationInit.get(), InitRange.getBegin(), /*DiscardedValue*/ false); | ||||
4449 | } | ||||
4450 | |||||
4451 | if (DelegationInit.isInvalid()) { | ||||
4452 | DelegationInit = | ||||
4453 | CreateRecoveryExpr(InitRange.getBegin(), InitRange.getEnd(), Args, | ||||
4454 | QualType(ClassDecl->getTypeForDecl(), 0)); | ||||
4455 | if (DelegationInit.isInvalid()) | ||||
4456 | return true; | ||||
4457 | } else { | ||||
4458 | // If we are in a dependent context, template instantiation will | ||||
4459 | // perform this type-checking again. Just save the arguments that we | ||||
4460 | // received in a ParenListExpr. | ||||
4461 | // FIXME: This isn't quite ideal, since our ASTs don't capture all | ||||
4462 | // of the information that we have about the base | ||||
4463 | // initializer. However, deconstructing the ASTs is a dicey process, | ||||
4464 | // and this approach is far more likely to get the corner cases right. | ||||
4465 | if (CurContext->isDependentContext()) | ||||
4466 | DelegationInit = Init; | ||||
4467 | } | ||||
4468 | |||||
4469 | return new (Context) CXXCtorInitializer(Context, TInfo, InitRange.getBegin(), | ||||
4470 | DelegationInit.getAs<Expr>(), | ||||
4471 | InitRange.getEnd()); | ||||
4472 | } | ||||
4473 | |||||
4474 | MemInitResult | ||||
4475 | Sema::BuildBaseInitializer(QualType BaseType, TypeSourceInfo *BaseTInfo, | ||||
4476 | Expr *Init, CXXRecordDecl *ClassDecl, | ||||
4477 | SourceLocation EllipsisLoc) { | ||||
4478 | SourceLocation BaseLoc | ||||
4479 | = BaseTInfo->getTypeLoc().getLocalSourceRange().getBegin(); | ||||
4480 | |||||
4481 | if (!BaseType->isDependentType() && !BaseType->isRecordType()) | ||||
4482 | return Diag(BaseLoc, diag::err_base_init_does_not_name_class) | ||||
4483 | << BaseType << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||
4484 | |||||
4485 | // C++ [class.base.init]p2: | ||||
4486 | // [...] Unless the mem-initializer-id names a nonstatic data | ||||
4487 | // member of the constructor's class or a direct or virtual base | ||||
4488 | // of that class, the mem-initializer is ill-formed. A | ||||
4489 | // mem-initializer-list can initialize a base class using any | ||||
4490 | // name that denotes that base class type. | ||||
4491 | |||||
4492 | // We can store the initializers in "as-written" form and delay analysis until | ||||
4493 | // instantiation if the constructor is dependent. But not for dependent | ||||
4494 | // (broken) code in a non-template! SetCtorInitializers does not expect this. | ||||
4495 | bool Dependent = CurContext->isDependentContext() && | ||||
4496 | (BaseType->isDependentType() || Init->isTypeDependent()); | ||||
4497 | |||||
4498 | SourceRange InitRange = Init->getSourceRange(); | ||||
4499 | if (EllipsisLoc.isValid()) { | ||||
4500 | // This is a pack expansion. | ||||
4501 | if (!BaseType->containsUnexpandedParameterPack()) { | ||||
4502 | Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | ||||
4503 | << SourceRange(BaseLoc, InitRange.getEnd()); | ||||
4504 | |||||
4505 | EllipsisLoc = SourceLocation(); | ||||
4506 | } | ||||
4507 | } else { | ||||
4508 | // Check for any unexpanded parameter packs. | ||||
4509 | if (DiagnoseUnexpandedParameterPack(BaseLoc, BaseTInfo, UPPC_Initializer)) | ||||
4510 | return true; | ||||
4511 | |||||
4512 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) | ||||
4513 | return true; | ||||
4514 | } | ||||
4515 | |||||
4516 | // Check for direct and virtual base classes. | ||||
4517 | const CXXBaseSpecifier *DirectBaseSpec = nullptr; | ||||
4518 | const CXXBaseSpecifier *VirtualBaseSpec = nullptr; | ||||
4519 | if (!Dependent) { | ||||
4520 | if (Context.hasSameUnqualifiedType(QualType(ClassDecl->getTypeForDecl(),0), | ||||
4521 | BaseType)) | ||||
4522 | return BuildDelegatingInitializer(BaseTInfo, Init, ClassDecl); | ||||
4523 | |||||
4524 | FindBaseInitializer(*this, ClassDecl, BaseType, DirectBaseSpec, | ||||
4525 | VirtualBaseSpec); | ||||
4526 | |||||
4527 | // C++ [base.class.init]p2: | ||||
4528 | // Unless the mem-initializer-id names a nonstatic data member of the | ||||
4529 | // constructor's class or a direct or virtual base of that class, the | ||||
4530 | // mem-initializer is ill-formed. | ||||
4531 | if (!DirectBaseSpec && !VirtualBaseSpec) { | ||||
4532 | // If the class has any dependent bases, then it's possible that | ||||
4533 | // one of those types will resolve to the same type as | ||||
4534 | // BaseType. Therefore, just treat this as a dependent base | ||||
4535 | // class initialization. FIXME: Should we try to check the | ||||
4536 | // initialization anyway? It seems odd. | ||||
4537 | if (ClassDecl->hasAnyDependentBases()) | ||||
4538 | Dependent = true; | ||||
4539 | else | ||||
4540 | return Diag(BaseLoc, diag::err_not_direct_base_or_virtual) | ||||
4541 | << BaseType << Context.getTypeDeclType(ClassDecl) | ||||
4542 | << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||
4543 | } | ||||
4544 | } | ||||
4545 | |||||
4546 | if (Dependent) { | ||||
4547 | DiscardCleanupsInEvaluationContext(); | ||||
4548 | |||||
4549 | return new (Context) CXXCtorInitializer(Context, BaseTInfo, | ||||
4550 | /*IsVirtual=*/false, | ||||
4551 | InitRange.getBegin(), Init, | ||||
4552 | InitRange.getEnd(), EllipsisLoc); | ||||
4553 | } | ||||
4554 | |||||
4555 | // C++ [base.class.init]p2: | ||||
4556 | // If a mem-initializer-id is ambiguous because it designates both | ||||
4557 | // a direct non-virtual base class and an inherited virtual base | ||||
4558 | // class, the mem-initializer is ill-formed. | ||||
4559 | if (DirectBaseSpec && VirtualBaseSpec) | ||||
4560 | return Diag(BaseLoc, diag::err_base_init_direct_and_virtual) | ||||
4561 | << BaseType << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||
4562 | |||||
4563 | const CXXBaseSpecifier *BaseSpec = DirectBaseSpec; | ||||
4564 | if (!BaseSpec) | ||||
4565 | BaseSpec = VirtualBaseSpec; | ||||
4566 | |||||
4567 | // Initialize the base. | ||||
4568 | bool InitList = true; | ||||
4569 | MultiExprArg Args = Init; | ||||
4570 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||
4571 | InitList = false; | ||||
4572 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||
4573 | } | ||||
4574 | |||||
4575 | InitializedEntity BaseEntity = | ||||
4576 | InitializedEntity::InitializeBase(Context, BaseSpec, VirtualBaseSpec); | ||||
4577 | InitializationKind Kind = | ||||
4578 | InitList ? InitializationKind::CreateDirectList(BaseLoc) | ||||
4579 | : InitializationKind::CreateDirect(BaseLoc, InitRange.getBegin(), | ||||
4580 | InitRange.getEnd()); | ||||
4581 | InitializationSequence InitSeq(*this, BaseEntity, Kind, Args); | ||||
4582 | ExprResult BaseInit = InitSeq.Perform(*this, BaseEntity, Kind, Args, nullptr); | ||||
4583 | if (!BaseInit.isInvalid()) { | ||||
4584 | // C++11 [class.base.init]p7: | ||||
4585 | // The initialization of each base and member constitutes a | ||||
4586 | // full-expression. | ||||
4587 | BaseInit = ActOnFinishFullExpr(BaseInit.get(), InitRange.getBegin(), | ||||
4588 | /*DiscardedValue*/ false); | ||||
4589 | } | ||||
4590 | |||||
4591 | if (BaseInit.isInvalid()) { | ||||
4592 | BaseInit = CreateRecoveryExpr(InitRange.getBegin(), InitRange.getEnd(), | ||||
4593 | Args, BaseType); | ||||
4594 | if (BaseInit.isInvalid()) | ||||
4595 | return true; | ||||
4596 | } else { | ||||
4597 | // If we are in a dependent context, template instantiation will | ||||
4598 | // perform this type-checking again. Just save the arguments that we | ||||
4599 | // received in a ParenListExpr. | ||||
4600 | // FIXME: This isn't quite ideal, since our ASTs don't capture all | ||||
4601 | // of the information that we have about the base | ||||
4602 | // initializer. However, deconstructing the ASTs is a dicey process, | ||||
4603 | // and this approach is far more likely to get the corner cases right. | ||||
4604 | if (CurContext->isDependentContext()) | ||||
4605 | BaseInit = Init; | ||||
4606 | } | ||||
4607 | |||||
4608 | return new (Context) CXXCtorInitializer(Context, BaseTInfo, | ||||
4609 | BaseSpec->isVirtual(), | ||||
4610 | InitRange.getBegin(), | ||||
4611 | BaseInit.getAs<Expr>(), | ||||
4612 | InitRange.getEnd(), EllipsisLoc); | ||||
4613 | } | ||||
4614 | |||||
4615 | // Create a static_cast\<T&&>(expr). | ||||
4616 | static Expr *CastForMoving(Sema &SemaRef, Expr *E, QualType T = QualType()) { | ||||
4617 | if (T.isNull()) T = E->getType(); | ||||
4618 | QualType TargetType = SemaRef.BuildReferenceType( | ||||
4619 | T, /*SpelledAsLValue*/false, SourceLocation(), DeclarationName()); | ||||
4620 | SourceLocation ExprLoc = E->getBeginLoc(); | ||||
4621 | TypeSourceInfo *TargetLoc = SemaRef.Context.getTrivialTypeSourceInfo( | ||||
4622 | TargetType, ExprLoc); | ||||
4623 | |||||
4624 | return SemaRef.BuildCXXNamedCast(ExprLoc, tok::kw_static_cast, TargetLoc, E, | ||||
4625 | SourceRange(ExprLoc, ExprLoc), | ||||
4626 | E->getSourceRange()).get(); | ||||
4627 | } | ||||
4628 | |||||
4629 | /// ImplicitInitializerKind - How an implicit base or member initializer should | ||||
4630 | /// initialize its base or member. | ||||
4631 | enum ImplicitInitializerKind { | ||||
4632 | IIK_Default, | ||||
4633 | IIK_Copy, | ||||
4634 | IIK_Move, | ||||
4635 | IIK_Inherit | ||||
4636 | }; | ||||
4637 | |||||
4638 | static bool | ||||
4639 | BuildImplicitBaseInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor, | ||||
4640 | ImplicitInitializerKind ImplicitInitKind, | ||||
4641 | CXXBaseSpecifier *BaseSpec, | ||||
4642 | bool IsInheritedVirtualBase, | ||||
4643 | CXXCtorInitializer *&CXXBaseInit) { | ||||
4644 | InitializedEntity InitEntity | ||||
4645 | = InitializedEntity::InitializeBase(SemaRef.Context, BaseSpec, | ||||
4646 | IsInheritedVirtualBase); | ||||
4647 | |||||
4648 | ExprResult BaseInit; | ||||
4649 | |||||
4650 | switch (ImplicitInitKind) { | ||||
4651 | case IIK_Inherit: | ||||
4652 | case IIK_Default: { | ||||
4653 | InitializationKind InitKind | ||||
4654 | = InitializationKind::CreateDefault(Constructor->getLocation()); | ||||
4655 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, None); | ||||
4656 | BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, None); | ||||
4657 | break; | ||||
4658 | } | ||||
4659 | |||||
4660 | case IIK_Move: | ||||
4661 | case IIK_Copy: { | ||||
4662 | bool Moving = ImplicitInitKind == IIK_Move; | ||||
4663 | ParmVarDecl *Param = Constructor->getParamDecl(0); | ||||
4664 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||
4665 | |||||
4666 | Expr *CopyCtorArg = | ||||
4667 | DeclRefExpr::Create(SemaRef.Context, NestedNameSpecifierLoc(), | ||||
4668 | SourceLocation(), Param, false, | ||||
4669 | Constructor->getLocation(), ParamType, | ||||
4670 | VK_LValue, nullptr); | ||||
4671 | |||||
4672 | SemaRef.MarkDeclRefReferenced(cast<DeclRefExpr>(CopyCtorArg)); | ||||
4673 | |||||
4674 | // Cast to the base class to avoid ambiguities. | ||||
4675 | QualType ArgTy = | ||||
4676 | SemaRef.Context.getQualifiedType(BaseSpec->getType().getUnqualifiedType(), | ||||
4677 | ParamType.getQualifiers()); | ||||
4678 | |||||
4679 | if (Moving) { | ||||
4680 | CopyCtorArg = CastForMoving(SemaRef, CopyCtorArg); | ||||
4681 | } | ||||
4682 | |||||
4683 | CXXCastPath BasePath; | ||||
4684 | BasePath.push_back(BaseSpec); | ||||
4685 | CopyCtorArg = SemaRef.ImpCastExprToType(CopyCtorArg, ArgTy, | ||||
4686 | CK_UncheckedDerivedToBase, | ||||
4687 | Moving ? VK_XValue : VK_LValue, | ||||
4688 | &BasePath).get(); | ||||
4689 | |||||
4690 | InitializationKind InitKind | ||||
4691 | = InitializationKind::CreateDirect(Constructor->getLocation(), | ||||
4692 | SourceLocation(), SourceLocation()); | ||||
4693 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, CopyCtorArg); | ||||
4694 | BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, CopyCtorArg); | ||||
4695 | break; | ||||
4696 | } | ||||
4697 | } | ||||
4698 | |||||
4699 | BaseInit = SemaRef.MaybeCreateExprWithCleanups(BaseInit); | ||||
4700 | if (BaseInit.isInvalid()) | ||||
4701 | return true; | ||||
4702 | |||||
4703 | CXXBaseInit = | ||||
4704 | new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||
4705 | SemaRef.Context.getTrivialTypeSourceInfo(BaseSpec->getType(), | ||||
4706 | SourceLocation()), | ||||
4707 | BaseSpec->isVirtual(), | ||||
4708 | SourceLocation(), | ||||
4709 | BaseInit.getAs<Expr>(), | ||||
4710 | SourceLocation(), | ||||
4711 | SourceLocation()); | ||||
4712 | |||||
4713 | return false; | ||||
4714 | } | ||||
4715 | |||||
4716 | static bool RefersToRValueRef(Expr *MemRef) { | ||||
4717 | ValueDecl *Referenced = cast<MemberExpr>(MemRef)->getMemberDecl(); | ||||
4718 | return Referenced->getType()->isRValueReferenceType(); | ||||
4719 | } | ||||
4720 | |||||
4721 | static bool | ||||
4722 | BuildImplicitMemberInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor, | ||||
4723 | ImplicitInitializerKind ImplicitInitKind, | ||||
4724 | FieldDecl *Field, IndirectFieldDecl *Indirect, | ||||
4725 | CXXCtorInitializer *&CXXMemberInit) { | ||||
4726 | if (Field->isInvalidDecl()) | ||||
4727 | return true; | ||||
4728 | |||||
4729 | SourceLocation Loc = Constructor->getLocation(); | ||||
4730 | |||||
4731 | if (ImplicitInitKind == IIK_Copy || ImplicitInitKind == IIK_Move) { | ||||
4732 | bool Moving = ImplicitInitKind == IIK_Move; | ||||
4733 | ParmVarDecl *Param = Constructor->getParamDecl(0); | ||||
4734 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||
4735 | |||||
4736 | // Suppress copying zero-width bitfields. | ||||
4737 | if (Field->isZeroLengthBitField(SemaRef.Context)) | ||||
4738 | return false; | ||||
4739 | |||||
4740 | Expr *MemberExprBase = | ||||
4741 | DeclRefExpr::Create(SemaRef.Context, NestedNameSpecifierLoc(), | ||||
4742 | SourceLocation(), Param, false, | ||||
4743 | Loc, ParamType, VK_LValue, nullptr); | ||||
4744 | |||||
4745 | SemaRef.MarkDeclRefReferenced(cast<DeclRefExpr>(MemberExprBase)); | ||||
4746 | |||||
4747 | if (Moving) { | ||||
4748 | MemberExprBase = CastForMoving(SemaRef, MemberExprBase); | ||||
4749 | } | ||||
4750 | |||||
4751 | // Build a reference to this field within the parameter. | ||||
4752 | CXXScopeSpec SS; | ||||
4753 | LookupResult MemberLookup(SemaRef, Field->getDeclName(), Loc, | ||||
4754 | Sema::LookupMemberName); | ||||
4755 | MemberLookup.addDecl(Indirect ? cast<ValueDecl>(Indirect) | ||||
4756 | : cast<ValueDecl>(Field), AS_public); | ||||
4757 | MemberLookup.resolveKind(); | ||||
4758 | ExprResult CtorArg | ||||
4759 | = SemaRef.BuildMemberReferenceExpr(MemberExprBase, | ||||
4760 | ParamType, Loc, | ||||
4761 | /*IsArrow=*/false, | ||||
4762 | SS, | ||||
4763 | /*TemplateKWLoc=*/SourceLocation(), | ||||
4764 | /*FirstQualifierInScope=*/nullptr, | ||||
4765 | MemberLookup, | ||||
4766 | /*TemplateArgs=*/nullptr, | ||||
4767 | /*S*/nullptr); | ||||
4768 | if (CtorArg.isInvalid()) | ||||
4769 | return true; | ||||
4770 | |||||
4771 | // C++11 [class.copy]p15: | ||||
4772 | // - if a member m has rvalue reference type T&&, it is direct-initialized | ||||
4773 | // with static_cast<T&&>(x.m); | ||||
4774 | if (RefersToRValueRef(CtorArg.get())) { | ||||
4775 | CtorArg = CastForMoving(SemaRef, CtorArg.get()); | ||||
4776 | } | ||||
4777 | |||||
4778 | InitializedEntity Entity = | ||||
4779 | Indirect ? InitializedEntity::InitializeMember(Indirect, nullptr, | ||||
4780 | /*Implicit*/ true) | ||||
4781 | : InitializedEntity::InitializeMember(Field, nullptr, | ||||
4782 | /*Implicit*/ true); | ||||
4783 | |||||
4784 | // Direct-initialize to use the copy constructor. | ||||
4785 | InitializationKind InitKind = | ||||
4786 | InitializationKind::CreateDirect(Loc, SourceLocation(), SourceLocation()); | ||||
4787 | |||||
4788 | Expr *CtorArgE = CtorArg.getAs<Expr>(); | ||||
4789 | InitializationSequence InitSeq(SemaRef, Entity, InitKind, CtorArgE); | ||||
4790 | ExprResult MemberInit = | ||||
4791 | InitSeq.Perform(SemaRef, Entity, InitKind, MultiExprArg(&CtorArgE, 1)); | ||||
4792 | MemberInit = SemaRef.MaybeCreateExprWithCleanups(MemberInit); | ||||
4793 | if (MemberInit.isInvalid()) | ||||
4794 | return true; | ||||
4795 | |||||
4796 | if (Indirect) | ||||
4797 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer( | ||||
4798 | SemaRef.Context, Indirect, Loc, Loc, MemberInit.getAs<Expr>(), Loc); | ||||
4799 | else | ||||
4800 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer( | ||||
4801 | SemaRef.Context, Field, Loc, Loc, MemberInit.getAs<Expr>(), Loc); | ||||
4802 | return false; | ||||
4803 | } | ||||
4804 | |||||
4805 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 4806, __extension__ __PRETTY_FUNCTION__)) | ||||
4806 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 4806, __extension__ __PRETTY_FUNCTION__)); | ||||
4807 | |||||
4808 | QualType FieldBaseElementType = | ||||
4809 | SemaRef.Context.getBaseElementType(Field->getType()); | ||||
4810 | |||||
4811 | if (FieldBaseElementType->isRecordType()) { | ||||
4812 | InitializedEntity InitEntity = | ||||
4813 | Indirect ? InitializedEntity::InitializeMember(Indirect, nullptr, | ||||
4814 | /*Implicit*/ true) | ||||
4815 | : InitializedEntity::InitializeMember(Field, nullptr, | ||||
4816 | /*Implicit*/ true); | ||||
4817 | InitializationKind InitKind = | ||||
4818 | InitializationKind::CreateDefault(Loc); | ||||
4819 | |||||
4820 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, None); | ||||
4821 | ExprResult MemberInit = | ||||
4822 | InitSeq.Perform(SemaRef, InitEntity, InitKind, None); | ||||
4823 | |||||
4824 | MemberInit = SemaRef.MaybeCreateExprWithCleanups(MemberInit); | ||||
4825 | if (MemberInit.isInvalid()) | ||||
4826 | return true; | ||||
4827 | |||||
4828 | if (Indirect) | ||||
4829 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||
4830 | Indirect, Loc, | ||||
4831 | Loc, | ||||
4832 | MemberInit.get(), | ||||
4833 | Loc); | ||||
4834 | else | ||||
4835 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||
4836 | Field, Loc, Loc, | ||||
4837 | MemberInit.get(), | ||||
4838 | Loc); | ||||
4839 | return false; | ||||
4840 | } | ||||
4841 | |||||
4842 | if (!Field->getParent()->isUnion()) { | ||||
4843 | if (FieldBaseElementType->isReferenceType()) { | ||||
4844 | SemaRef.Diag(Constructor->getLocation(), | ||||
4845 | diag::err_uninitialized_member_in_ctor) | ||||
4846 | << (int)Constructor->isImplicit() | ||||
4847 | << SemaRef.Context.getTagDeclType(Constructor->getParent()) | ||||
4848 | << 0 << Field->getDeclName(); | ||||
4849 | SemaRef.Diag(Field->getLocation(), diag::note_declared_at); | ||||
4850 | return true; | ||||
4851 | } | ||||
4852 | |||||
4853 | if (FieldBaseElementType.isConstQualified()) { | ||||
4854 | SemaRef.Diag(Constructor->getLocation(), | ||||
4855 | diag::err_uninitialized_member_in_ctor) | ||||
4856 | << (int)Constructor->isImplicit() | ||||
4857 | << SemaRef.Context.getTagDeclType(Constructor->getParent()) | ||||
4858 | << 1 << Field->getDeclName(); | ||||
4859 | SemaRef.Diag(Field->getLocation(), diag::note_declared_at); | ||||
4860 | return true; | ||||
4861 | } | ||||
4862 | } | ||||
4863 | |||||
4864 | if (FieldBaseElementType.hasNonTrivialObjCLifetime()) { | ||||
4865 | // ARC and Weak: | ||||
4866 | // Default-initialize Objective-C pointers to NULL. | ||||
4867 | CXXMemberInit | ||||
4868 | = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, Field, | ||||
4869 | Loc, Loc, | ||||
4870 | new (SemaRef.Context) ImplicitValueInitExpr(Field->getType()), | ||||
4871 | Loc); | ||||
4872 | return false; | ||||
4873 | } | ||||
4874 | |||||
4875 | // Nothing to initialize. | ||||
4876 | CXXMemberInit = nullptr; | ||||
4877 | return false; | ||||
4878 | } | ||||
4879 | |||||
4880 | namespace { | ||||
4881 | struct BaseAndFieldInfo { | ||||
4882 | Sema &S; | ||||
4883 | CXXConstructorDecl *Ctor; | ||||
4884 | bool AnyErrorsInInits; | ||||
4885 | ImplicitInitializerKind IIK; | ||||
4886 | llvm::DenseMap<const void *, CXXCtorInitializer*> AllBaseFields; | ||||
4887 | SmallVector<CXXCtorInitializer*, 8> AllToInit; | ||||
4888 | llvm::DenseMap<TagDecl*, FieldDecl*> ActiveUnionMember; | ||||
4889 | |||||
4890 | BaseAndFieldInfo(Sema &S, CXXConstructorDecl *Ctor, bool ErrorsInInits) | ||||
4891 | : S(S), Ctor(Ctor), AnyErrorsInInits(ErrorsInInits) { | ||||
4892 | bool Generated = Ctor->isImplicit() || Ctor->isDefaulted(); | ||||
4893 | if (Ctor->getInheritedConstructor()) | ||||
4894 | IIK = IIK_Inherit; | ||||
4895 | else if (Generated && Ctor->isCopyConstructor()) | ||||
4896 | IIK = IIK_Copy; | ||||
4897 | else if (Generated && Ctor->isMoveConstructor()) | ||||
4898 | IIK = IIK_Move; | ||||
4899 | else | ||||
4900 | IIK = IIK_Default; | ||||
4901 | } | ||||
4902 | |||||
4903 | bool isImplicitCopyOrMove() const { | ||||
4904 | switch (IIK) { | ||||
4905 | case IIK_Copy: | ||||
4906 | case IIK_Move: | ||||
4907 | return true; | ||||
4908 | |||||
4909 | case IIK_Default: | ||||
4910 | case IIK_Inherit: | ||||
4911 | return false; | ||||
4912 | } | ||||
4913 | |||||
4914 | llvm_unreachable("Invalid ImplicitInitializerKind!")::llvm::llvm_unreachable_internal("Invalid ImplicitInitializerKind!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 4914); | ||||
4915 | } | ||||
4916 | |||||
4917 | bool addFieldInitializer(CXXCtorInitializer *Init) { | ||||
4918 | AllToInit.push_back(Init); | ||||
4919 | |||||
4920 | // Check whether this initializer makes the field "used". | ||||
4921 | if (Init->getInit()->HasSideEffects(S.Context)) | ||||
4922 | S.UnusedPrivateFields.remove(Init->getAnyMember()); | ||||
4923 | |||||
4924 | return false; | ||||
4925 | } | ||||
4926 | |||||
4927 | bool isInactiveUnionMember(FieldDecl *Field) { | ||||
4928 | RecordDecl *Record = Field->getParent(); | ||||
4929 | if (!Record->isUnion()) | ||||
4930 | return false; | ||||
4931 | |||||
4932 | if (FieldDecl *Active = | ||||
4933 | ActiveUnionMember.lookup(Record->getCanonicalDecl())) | ||||
4934 | return Active != Field->getCanonicalDecl(); | ||||
4935 | |||||
4936 | // In an implicit copy or move constructor, ignore any in-class initializer. | ||||
4937 | if (isImplicitCopyOrMove()) | ||||
4938 | return true; | ||||
4939 | |||||
4940 | // If there's no explicit initialization, the field is active only if it | ||||
4941 | // has an in-class initializer... | ||||
4942 | if (Field->hasInClassInitializer()) | ||||
4943 | return false; | ||||
4944 | // ... or it's an anonymous struct or union whose class has an in-class | ||||
4945 | // initializer. | ||||
4946 | if (!Field->isAnonymousStructOrUnion()) | ||||
4947 | return true; | ||||
4948 | CXXRecordDecl *FieldRD = Field->getType()->getAsCXXRecordDecl(); | ||||
4949 | return !FieldRD->hasInClassInitializer(); | ||||
4950 | } | ||||
4951 | |||||
4952 | /// Determine whether the given field is, or is within, a union member | ||||
4953 | /// that is inactive (because there was an initializer given for a different | ||||
4954 | /// member of the union, or because the union was not initialized at all). | ||||
4955 | bool isWithinInactiveUnionMember(FieldDecl *Field, | ||||
4956 | IndirectFieldDecl *Indirect) { | ||||
4957 | if (!Indirect) | ||||
4958 | return isInactiveUnionMember(Field); | ||||
4959 | |||||
4960 | for (auto *C : Indirect->chain()) { | ||||
4961 | FieldDecl *Field = dyn_cast<FieldDecl>(C); | ||||
4962 | if (Field && isInactiveUnionMember(Field)) | ||||
4963 | return true; | ||||
4964 | } | ||||
4965 | return false; | ||||
4966 | } | ||||
4967 | }; | ||||
4968 | } | ||||
4969 | |||||
4970 | /// Determine whether the given type is an incomplete or zero-lenfgth | ||||
4971 | /// array type. | ||||
4972 | static bool isIncompleteOrZeroLengthArrayType(ASTContext &Context, QualType T) { | ||||
4973 | if (T->isIncompleteArrayType()) | ||||
4974 | return true; | ||||
4975 | |||||
4976 | while (const ConstantArrayType *ArrayT = Context.getAsConstantArrayType(T)) { | ||||
4977 | if (!ArrayT->getSize()) | ||||
4978 | return true; | ||||
4979 | |||||
4980 | T = ArrayT->getElementType(); | ||||
4981 | } | ||||
4982 | |||||
4983 | return false; | ||||
4984 | } | ||||
4985 | |||||
4986 | static bool CollectFieldInitializer(Sema &SemaRef, BaseAndFieldInfo &Info, | ||||
4987 | FieldDecl *Field, | ||||
4988 | IndirectFieldDecl *Indirect = nullptr) { | ||||
4989 | if (Field->isInvalidDecl()) | ||||
4990 | return false; | ||||
4991 | |||||
4992 | // Overwhelmingly common case: we have a direct initializer for this field. | ||||
4993 | if (CXXCtorInitializer *Init = | ||||
4994 | Info.AllBaseFields.lookup(Field->getCanonicalDecl())) | ||||
4995 | return Info.addFieldInitializer(Init); | ||||
4996 | |||||
4997 | // C++11 [class.base.init]p8: | ||||
4998 | // if the entity is a non-static data member that has a | ||||
4999 | // brace-or-equal-initializer and either | ||||
5000 | // -- the constructor's class is a union and no other variant member of that | ||||
5001 | // union is designated by a mem-initializer-id or | ||||
5002 | // -- the constructor's class is not a union, and, if the entity is a member | ||||
5003 | // of an anonymous union, no other member of that union is designated by | ||||
5004 | // a mem-initializer-id, | ||||
5005 | // the entity is initialized as specified in [dcl.init]. | ||||
5006 | // | ||||
5007 | // We also apply the same rules to handle anonymous structs within anonymous | ||||
5008 | // unions. | ||||
5009 | if (Info.isWithinInactiveUnionMember(Field, Indirect)) | ||||
5010 | return false; | ||||
5011 | |||||
5012 | if (Field->hasInClassInitializer() && !Info.isImplicitCopyOrMove()) { | ||||
5013 | ExprResult DIE = | ||||
5014 | SemaRef.BuildCXXDefaultInitExpr(Info.Ctor->getLocation(), Field); | ||||
5015 | if (DIE.isInvalid()) | ||||
5016 | return true; | ||||
5017 | |||||
5018 | auto Entity = InitializedEntity::InitializeMember(Field, nullptr, true); | ||||
5019 | SemaRef.checkInitializerLifetime(Entity, DIE.get()); | ||||
5020 | |||||
5021 | CXXCtorInitializer *Init; | ||||
5022 | if (Indirect) | ||||
5023 | Init = new (SemaRef.Context) | ||||
5024 | CXXCtorInitializer(SemaRef.Context, Indirect, SourceLocation(), | ||||
5025 | SourceLocation(), DIE.get(), SourceLocation()); | ||||
5026 | else | ||||
5027 | Init = new (SemaRef.Context) | ||||
5028 | CXXCtorInitializer(SemaRef.Context, Field, SourceLocation(), | ||||
5029 | SourceLocation(), DIE.get(), SourceLocation()); | ||||
5030 | return Info.addFieldInitializer(Init); | ||||
5031 | } | ||||
5032 | |||||
5033 | // Don't initialize incomplete or zero-length arrays. | ||||
5034 | if (isIncompleteOrZeroLengthArrayType(SemaRef.Context, Field->getType())) | ||||
5035 | return false; | ||||
5036 | |||||
5037 | // Don't try to build an implicit initializer if there were semantic | ||||
5038 | // errors in any of the initializers (and therefore we might be | ||||
5039 | // missing some that the user actually wrote). | ||||
5040 | if (Info.AnyErrorsInInits) | ||||
5041 | return false; | ||||
5042 | |||||
5043 | CXXCtorInitializer *Init = nullptr; | ||||
5044 | if (BuildImplicitMemberInitializer(Info.S, Info.Ctor, Info.IIK, Field, | ||||
5045 | Indirect, Init)) | ||||
5046 | return true; | ||||
5047 | |||||
5048 | if (!Init) | ||||
5049 | return false; | ||||
5050 | |||||
5051 | return Info.addFieldInitializer(Init); | ||||
5052 | } | ||||
5053 | |||||
5054 | bool | ||||
5055 | Sema::SetDelegatingInitializer(CXXConstructorDecl *Constructor, | ||||
5056 | CXXCtorInitializer *Initializer) { | ||||
5057 | assert(Initializer->isDelegatingInitializer())(static_cast <bool> (Initializer->isDelegatingInitializer ()) ? void (0) : __assert_fail ("Initializer->isDelegatingInitializer()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5057, __extension__ __PRETTY_FUNCTION__)); | ||||
5058 | Constructor->setNumCtorInitializers(1); | ||||
5059 | CXXCtorInitializer **initializer = | ||||
5060 | new (Context) CXXCtorInitializer*[1]; | ||||
5061 | memcpy(initializer, &Initializer, sizeof (CXXCtorInitializer*)); | ||||
5062 | Constructor->setCtorInitializers(initializer); | ||||
5063 | |||||
5064 | if (CXXDestructorDecl *Dtor = LookupDestructor(Constructor->getParent())) { | ||||
5065 | MarkFunctionReferenced(Initializer->getSourceLocation(), Dtor); | ||||
5066 | DiagnoseUseOfDecl(Dtor, Initializer->getSourceLocation()); | ||||
5067 | } | ||||
5068 | |||||
5069 | DelegatingCtorDecls.push_back(Constructor); | ||||
5070 | |||||
5071 | DiagnoseUninitializedFields(*this, Constructor); | ||||
5072 | |||||
5073 | return false; | ||||
5074 | } | ||||
5075 | |||||
5076 | bool Sema::SetCtorInitializers(CXXConstructorDecl *Constructor, bool AnyErrors, | ||||
5077 | ArrayRef<CXXCtorInitializer *> Initializers) { | ||||
5078 | if (Constructor->isDependentContext()) { | ||||
5079 | // Just store the initializers as written, they will be checked during | ||||
5080 | // instantiation. | ||||
5081 | if (!Initializers.empty()) { | ||||
5082 | Constructor->setNumCtorInitializers(Initializers.size()); | ||||
5083 | CXXCtorInitializer **baseOrMemberInitializers = | ||||
5084 | new (Context) CXXCtorInitializer*[Initializers.size()]; | ||||
5085 | memcpy(baseOrMemberInitializers, Initializers.data(), | ||||
5086 | Initializers.size() * sizeof(CXXCtorInitializer*)); | ||||
5087 | Constructor->setCtorInitializers(baseOrMemberInitializers); | ||||
5088 | } | ||||
5089 | |||||
5090 | // Let template instantiation know whether we had errors. | ||||
5091 | if (AnyErrors) | ||||
5092 | Constructor->setInvalidDecl(); | ||||
5093 | |||||
5094 | return false; | ||||
5095 | } | ||||
5096 | |||||
5097 | BaseAndFieldInfo Info(*this, Constructor, AnyErrors); | ||||
5098 | |||||
5099 | // We need to build the initializer AST according to order of construction | ||||
5100 | // and not what user specified in the Initializers list. | ||||
5101 | CXXRecordDecl *ClassDecl = Constructor->getParent()->getDefinition(); | ||||
5102 | if (!ClassDecl) | ||||
5103 | return true; | ||||
5104 | |||||
5105 | bool HadError = false; | ||||
5106 | |||||
5107 | for (unsigned i = 0; i < Initializers.size(); i++) { | ||||
5108 | CXXCtorInitializer *Member = Initializers[i]; | ||||
5109 | |||||
5110 | if (Member->isBaseInitializer()) | ||||
5111 | Info.AllBaseFields[Member->getBaseClass()->getAs<RecordType>()] = Member; | ||||
5112 | else { | ||||
5113 | Info.AllBaseFields[Member->getAnyMember()->getCanonicalDecl()] = Member; | ||||
5114 | |||||
5115 | if (IndirectFieldDecl *F = Member->getIndirectMember()) { | ||||
5116 | for (auto *C : F->chain()) { | ||||
5117 | FieldDecl *FD = dyn_cast<FieldDecl>(C); | ||||
5118 | if (FD && FD->getParent()->isUnion()) | ||||
5119 | Info.ActiveUnionMember.insert(std::make_pair( | ||||
5120 | FD->getParent()->getCanonicalDecl(), FD->getCanonicalDecl())); | ||||
5121 | } | ||||
5122 | } else if (FieldDecl *FD = Member->getMember()) { | ||||
5123 | if (FD->getParent()->isUnion()) | ||||
5124 | Info.ActiveUnionMember.insert(std::make_pair( | ||||
5125 | FD->getParent()->getCanonicalDecl(), FD->getCanonicalDecl())); | ||||
5126 | } | ||||
5127 | } | ||||
5128 | } | ||||
5129 | |||||
5130 | // Keep track of the direct virtual bases. | ||||
5131 | llvm::SmallPtrSet<CXXBaseSpecifier *, 16> DirectVBases; | ||||
5132 | for (auto &I : ClassDecl->bases()) { | ||||
5133 | if (I.isVirtual()) | ||||
5134 | DirectVBases.insert(&I); | ||||
5135 | } | ||||
5136 | |||||
5137 | // Push virtual bases before others. | ||||
5138 | for (auto &VBase : ClassDecl->vbases()) { | ||||
5139 | if (CXXCtorInitializer *Value | ||||
5140 | = Info.AllBaseFields.lookup(VBase.getType()->getAs<RecordType>())) { | ||||
5141 | // [class.base.init]p7, per DR257: | ||||
5142 | // A mem-initializer where the mem-initializer-id names a virtual base | ||||
5143 | // class is ignored during execution of a constructor of any class that | ||||
5144 | // is not the most derived class. | ||||
5145 | if (ClassDecl->isAbstract()) { | ||||
5146 | // FIXME: Provide a fixit to remove the base specifier. This requires | ||||
5147 | // tracking the location of the associated comma for a base specifier. | ||||
5148 | Diag(Value->getSourceLocation(), diag::warn_abstract_vbase_init_ignored) | ||||
5149 | << VBase.getType() << ClassDecl; | ||||
5150 | DiagnoseAbstractType(ClassDecl); | ||||
5151 | } | ||||
5152 | |||||
5153 | Info.AllToInit.push_back(Value); | ||||
5154 | } else if (!AnyErrors && !ClassDecl->isAbstract()) { | ||||
5155 | // [class.base.init]p8, per DR257: | ||||
5156 | // If a given [...] base class is not named by a mem-initializer-id | ||||
5157 | // [...] and the entity is not a virtual base class of an abstract | ||||
5158 | // class, then [...] the entity is default-initialized. | ||||
5159 | bool IsInheritedVirtualBase = !DirectVBases.count(&VBase); | ||||
5160 | CXXCtorInitializer *CXXBaseInit; | ||||
5161 | if (BuildImplicitBaseInitializer(*this, Constructor, Info.IIK, | ||||
5162 | &VBase, IsInheritedVirtualBase, | ||||
5163 | CXXBaseInit)) { | ||||
5164 | HadError = true; | ||||
5165 | continue; | ||||
5166 | } | ||||
5167 | |||||
5168 | Info.AllToInit.push_back(CXXBaseInit); | ||||
5169 | } | ||||
5170 | } | ||||
5171 | |||||
5172 | // Non-virtual bases. | ||||
5173 | for (auto &Base : ClassDecl->bases()) { | ||||
5174 | // Virtuals are in the virtual base list and already constructed. | ||||
5175 | if (Base.isVirtual()) | ||||
5176 | continue; | ||||
5177 | |||||
5178 | if (CXXCtorInitializer *Value | ||||
5179 | = Info.AllBaseFields.lookup(Base.getType()->getAs<RecordType>())) { | ||||
5180 | Info.AllToInit.push_back(Value); | ||||
5181 | } else if (!AnyErrors) { | ||||
5182 | CXXCtorInitializer *CXXBaseInit; | ||||
5183 | if (BuildImplicitBaseInitializer(*this, Constructor, Info.IIK, | ||||
5184 | &Base, /*IsInheritedVirtualBase=*/false, | ||||
5185 | CXXBaseInit)) { | ||||
5186 | HadError = true; | ||||
5187 | continue; | ||||
5188 | } | ||||
5189 | |||||
5190 | Info.AllToInit.push_back(CXXBaseInit); | ||||
5191 | } | ||||
5192 | } | ||||
5193 | |||||
5194 | // Fields. | ||||
5195 | for (auto *Mem : ClassDecl->decls()) { | ||||
5196 | if (auto *F = dyn_cast<FieldDecl>(Mem)) { | ||||
5197 | // C++ [class.bit]p2: | ||||
5198 | // A declaration for a bit-field that omits the identifier declares an | ||||
5199 | // unnamed bit-field. Unnamed bit-fields are not members and cannot be | ||||
5200 | // initialized. | ||||
5201 | if (F->isUnnamedBitfield()) | ||||
5202 | continue; | ||||
5203 | |||||
5204 | // If we're not generating the implicit copy/move constructor, then we'll | ||||
5205 | // handle anonymous struct/union fields based on their individual | ||||
5206 | // indirect fields. | ||||
5207 | if (F->isAnonymousStructOrUnion() && !Info.isImplicitCopyOrMove()) | ||||
5208 | continue; | ||||
5209 | |||||
5210 | if (CollectFieldInitializer(*this, Info, F)) | ||||
5211 | HadError = true; | ||||
5212 | continue; | ||||
5213 | } | ||||
5214 | |||||
5215 | // Beyond this point, we only consider default initialization. | ||||
5216 | if (Info.isImplicitCopyOrMove()) | ||||
5217 | continue; | ||||
5218 | |||||
5219 | if (auto *F = dyn_cast<IndirectFieldDecl>(Mem)) { | ||||
5220 | if (F->getType()->isIncompleteArrayType()) { | ||||
5221 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5222, __extension__ __PRETTY_FUNCTION__)) | ||||
5222 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5222, __extension__ __PRETTY_FUNCTION__)); | ||||
5223 | continue; | ||||
5224 | } | ||||
5225 | |||||
5226 | // Initialize each field of an anonymous struct individually. | ||||
5227 | if (CollectFieldInitializer(*this, Info, F->getAnonField(), F)) | ||||
5228 | HadError = true; | ||||
5229 | |||||
5230 | continue; | ||||
5231 | } | ||||
5232 | } | ||||
5233 | |||||
5234 | unsigned NumInitializers = Info.AllToInit.size(); | ||||
5235 | if (NumInitializers > 0) { | ||||
5236 | Constructor->setNumCtorInitializers(NumInitializers); | ||||
5237 | CXXCtorInitializer **baseOrMemberInitializers = | ||||
5238 | new (Context) CXXCtorInitializer*[NumInitializers]; | ||||
5239 | memcpy(baseOrMemberInitializers, Info.AllToInit.data(), | ||||
5240 | NumInitializers * sizeof(CXXCtorInitializer*)); | ||||
5241 | Constructor->setCtorInitializers(baseOrMemberInitializers); | ||||
5242 | |||||
5243 | // Constructors implicitly reference the base and member | ||||
5244 | // destructors. | ||||
5245 | MarkBaseAndMemberDestructorsReferenced(Constructor->getLocation(), | ||||
5246 | Constructor->getParent()); | ||||
5247 | } | ||||
5248 | |||||
5249 | return HadError; | ||||
5250 | } | ||||
5251 | |||||
5252 | static void PopulateKeysForFields(FieldDecl *Field, SmallVectorImpl<const void*> &IdealInits) { | ||||
5253 | if (const RecordType *RT = Field->getType()->getAs<RecordType>()) { | ||||
5254 | const RecordDecl *RD = RT->getDecl(); | ||||
5255 | if (RD->isAnonymousStructOrUnion()) { | ||||
5256 | for (auto *Field : RD->fields()) | ||||
5257 | PopulateKeysForFields(Field, IdealInits); | ||||
5258 | return; | ||||
5259 | } | ||||
5260 | } | ||||
5261 | IdealInits.push_back(Field->getCanonicalDecl()); | ||||
5262 | } | ||||
5263 | |||||
5264 | static const void *GetKeyForBase(ASTContext &Context, QualType BaseType) { | ||||
5265 | return Context.getCanonicalType(BaseType).getTypePtr(); | ||||
5266 | } | ||||
5267 | |||||
5268 | static const void *GetKeyForMember(ASTContext &Context, | ||||
5269 | CXXCtorInitializer *Member) { | ||||
5270 | if (!Member->isAnyMemberInitializer()) | ||||
5271 | return GetKeyForBase(Context, QualType(Member->getBaseClass(), 0)); | ||||
5272 | |||||
5273 | return Member->getAnyMember()->getCanonicalDecl(); | ||||
5274 | } | ||||
5275 | |||||
5276 | static void AddInitializerToDiag(const Sema::SemaDiagnosticBuilder &Diag, | ||||
5277 | const CXXCtorInitializer *Previous, | ||||
5278 | const CXXCtorInitializer *Current) { | ||||
5279 | if (Previous->isAnyMemberInitializer()) | ||||
5280 | Diag << 0 << Previous->getAnyMember(); | ||||
5281 | else | ||||
5282 | Diag << 1 << Previous->getTypeSourceInfo()->getType(); | ||||
5283 | |||||
5284 | if (Current->isAnyMemberInitializer()) | ||||
5285 | Diag << 0 << Current->getAnyMember(); | ||||
5286 | else | ||||
5287 | Diag << 1 << Current->getTypeSourceInfo()->getType(); | ||||
5288 | } | ||||
5289 | |||||
5290 | static void DiagnoseBaseOrMemInitializerOrder( | ||||
5291 | Sema &SemaRef, const CXXConstructorDecl *Constructor, | ||||
5292 | ArrayRef<CXXCtorInitializer *> Inits) { | ||||
5293 | if (Constructor->getDeclContext()->isDependentContext()) | ||||
5294 | return; | ||||
5295 | |||||
5296 | // Don't check initializers order unless the warning is enabled at the | ||||
5297 | // location of at least one initializer. | ||||
5298 | bool ShouldCheckOrder = false; | ||||
5299 | for (unsigned InitIndex = 0; InitIndex != Inits.size(); ++InitIndex) { | ||||
5300 | CXXCtorInitializer *Init = Inits[InitIndex]; | ||||
5301 | if (!SemaRef.Diags.isIgnored(diag::warn_initializer_out_of_order, | ||||
5302 | Init->getSourceLocation())) { | ||||
5303 | ShouldCheckOrder = true; | ||||
5304 | break; | ||||
5305 | } | ||||
5306 | } | ||||
5307 | if (!ShouldCheckOrder) | ||||
5308 | return; | ||||
5309 | |||||
5310 | // Build the list of bases and members in the order that they'll | ||||
5311 | // actually be initialized. The explicit initializers should be in | ||||
5312 | // this same order but may be missing things. | ||||
5313 | SmallVector<const void*, 32> IdealInitKeys; | ||||
5314 | |||||
5315 | const CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||
5316 | |||||
5317 | // 1. Virtual bases. | ||||
5318 | for (const auto &VBase : ClassDecl->vbases()) | ||||
5319 | IdealInitKeys.push_back(GetKeyForBase(SemaRef.Context, VBase.getType())); | ||||
5320 | |||||
5321 | // 2. Non-virtual bases. | ||||
5322 | for (const auto &Base : ClassDecl->bases()) { | ||||
5323 | if (Base.isVirtual()) | ||||
5324 | continue; | ||||
5325 | IdealInitKeys.push_back(GetKeyForBase(SemaRef.Context, Base.getType())); | ||||
5326 | } | ||||
5327 | |||||
5328 | // 3. Direct fields. | ||||
5329 | for (auto *Field : ClassDecl->fields()) { | ||||
5330 | if (Field->isUnnamedBitfield()) | ||||
5331 | continue; | ||||
5332 | |||||
5333 | PopulateKeysForFields(Field, IdealInitKeys); | ||||
5334 | } | ||||
5335 | |||||
5336 | unsigned NumIdealInits = IdealInitKeys.size(); | ||||
5337 | unsigned IdealIndex = 0; | ||||
5338 | |||||
5339 | // Track initializers that are in an incorrect order for either a warning or | ||||
5340 | // note if multiple ones occur. | ||||
5341 | SmallVector<unsigned> WarnIndexes; | ||||
5342 | // Correlates the index of an initializer in the init-list to the index of | ||||
5343 | // the field/base in the class. | ||||
5344 | SmallVector<std::pair<unsigned, unsigned>, 32> CorrelatedInitOrder; | ||||
5345 | |||||
5346 | for (unsigned InitIndex = 0; InitIndex != Inits.size(); ++InitIndex) { | ||||
5347 | const void *InitKey = GetKeyForMember(SemaRef.Context, Inits[InitIndex]); | ||||
5348 | |||||
5349 | // Scan forward to try to find this initializer in the idealized | ||||
5350 | // initializers list. | ||||
5351 | for (; IdealIndex != NumIdealInits; ++IdealIndex) | ||||
5352 | if (InitKey == IdealInitKeys[IdealIndex]) | ||||
5353 | break; | ||||
5354 | |||||
5355 | // If we didn't find this initializer, it must be because we | ||||
5356 | // scanned past it on a previous iteration. That can only | ||||
5357 | // happen if we're out of order; emit a warning. | ||||
5358 | if (IdealIndex == NumIdealInits && InitIndex) { | ||||
5359 | WarnIndexes.push_back(InitIndex); | ||||
5360 | |||||
5361 | // Move back to the initializer's location in the ideal list. | ||||
5362 | for (IdealIndex = 0; IdealIndex != NumIdealInits; ++IdealIndex) | ||||
5363 | if (InitKey == IdealInitKeys[IdealIndex]) | ||||
5364 | break; | ||||
5365 | |||||
5366 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5367, __extension__ __PRETTY_FUNCTION__)) | ||||
5367 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5367, __extension__ __PRETTY_FUNCTION__)); | ||||
5368 | } | ||||
5369 | CorrelatedInitOrder.emplace_back(IdealIndex, InitIndex); | ||||
5370 | } | ||||
5371 | |||||
5372 | if (WarnIndexes.empty()) | ||||
5373 | return; | ||||
5374 | |||||
5375 | // Sort based on the ideal order, first in the pair. | ||||
5376 | llvm::sort(CorrelatedInitOrder, | ||||
5377 | [](auto &LHS, auto &RHS) { return LHS.first < RHS.first; }); | ||||
5378 | |||||
5379 | // Introduce a new scope as SemaDiagnosticBuilder needs to be destroyed to | ||||
5380 | // emit the diagnostic before we can try adding notes. | ||||
5381 | { | ||||
5382 | Sema::SemaDiagnosticBuilder D = SemaRef.Diag( | ||||
5383 | Inits[WarnIndexes.front() - 1]->getSourceLocation(), | ||||
5384 | WarnIndexes.size() == 1 ? diag::warn_initializer_out_of_order | ||||
5385 | : diag::warn_some_initializers_out_of_order); | ||||
5386 | |||||
5387 | for (unsigned I = 0; I < CorrelatedInitOrder.size(); ++I) { | ||||
5388 | if (CorrelatedInitOrder[I].second == I) | ||||
5389 | continue; | ||||
5390 | // Ideally we would be using InsertFromRange here, but clang doesn't | ||||
5391 | // appear to handle InsertFromRange correctly when the source range is | ||||
5392 | // modified by another fix-it. | ||||
5393 | D << FixItHint::CreateReplacement( | ||||
5394 | Inits[I]->getSourceRange(), | ||||
5395 | Lexer::getSourceText( | ||||
5396 | CharSourceRange::getTokenRange( | ||||
5397 | Inits[CorrelatedInitOrder[I].second]->getSourceRange()), | ||||
5398 | SemaRef.getSourceManager(), SemaRef.getLangOpts())); | ||||
5399 | } | ||||
5400 | |||||
5401 | // If there is only 1 item out of order, the warning expects the name and | ||||
5402 | // type of each being added to it. | ||||
5403 | if (WarnIndexes.size() == 1) { | ||||
5404 | AddInitializerToDiag(D, Inits[WarnIndexes.front() - 1], | ||||
5405 | Inits[WarnIndexes.front()]); | ||||
5406 | return; | ||||
5407 | } | ||||
5408 | } | ||||
5409 | // More than 1 item to warn, create notes letting the user know which ones | ||||
5410 | // are bad. | ||||
5411 | for (unsigned WarnIndex : WarnIndexes) { | ||||
5412 | const clang::CXXCtorInitializer *PrevInit = Inits[WarnIndex - 1]; | ||||
5413 | auto D = SemaRef.Diag(PrevInit->getSourceLocation(), | ||||
5414 | diag::note_initializer_out_of_order); | ||||
5415 | AddInitializerToDiag(D, PrevInit, Inits[WarnIndex]); | ||||
5416 | D << PrevInit->getSourceRange(); | ||||
5417 | } | ||||
5418 | } | ||||
5419 | |||||
5420 | namespace { | ||||
5421 | bool CheckRedundantInit(Sema &S, | ||||
5422 | CXXCtorInitializer *Init, | ||||
5423 | CXXCtorInitializer *&PrevInit) { | ||||
5424 | if (!PrevInit) { | ||||
5425 | PrevInit = Init; | ||||
5426 | return false; | ||||
5427 | } | ||||
5428 | |||||
5429 | if (FieldDecl *Field = Init->getAnyMember()) | ||||
5430 | S.Diag(Init->getSourceLocation(), | ||||
5431 | diag::err_multiple_mem_initialization) | ||||
5432 | << Field->getDeclName() | ||||
5433 | << Init->getSourceRange(); | ||||
5434 | else { | ||||
5435 | const Type *BaseClass = Init->getBaseClass(); | ||||
5436 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5436, __extension__ __PRETTY_FUNCTION__)); | ||||
5437 | S.Diag(Init->getSourceLocation(), | ||||
5438 | diag::err_multiple_base_initialization) | ||||
5439 | << QualType(BaseClass, 0) | ||||
5440 | << Init->getSourceRange(); | ||||
5441 | } | ||||
5442 | S.Diag(PrevInit->getSourceLocation(), diag::note_previous_initializer) | ||||
5443 | << 0 << PrevInit->getSourceRange(); | ||||
5444 | |||||
5445 | return true; | ||||
5446 | } | ||||
5447 | |||||
5448 | typedef std::pair<NamedDecl *, CXXCtorInitializer *> UnionEntry; | ||||
5449 | typedef llvm::DenseMap<RecordDecl*, UnionEntry> RedundantUnionMap; | ||||
5450 | |||||
5451 | bool CheckRedundantUnionInit(Sema &S, | ||||
5452 | CXXCtorInitializer *Init, | ||||
5453 | RedundantUnionMap &Unions) { | ||||
5454 | FieldDecl *Field = Init->getAnyMember(); | ||||
5455 | RecordDecl *Parent = Field->getParent(); | ||||
5456 | NamedDecl *Child = Field; | ||||
5457 | |||||
5458 | while (Parent->isAnonymousStructOrUnion() || Parent->isUnion()) { | ||||
5459 | if (Parent->isUnion()) { | ||||
5460 | UnionEntry &En = Unions[Parent]; | ||||
5461 | if (En.first && En.first != Child) { | ||||
5462 | S.Diag(Init->getSourceLocation(), | ||||
5463 | diag::err_multiple_mem_union_initialization) | ||||
5464 | << Field->getDeclName() | ||||
5465 | << Init->getSourceRange(); | ||||
5466 | S.Diag(En.second->getSourceLocation(), diag::note_previous_initializer) | ||||
5467 | << 0 << En.second->getSourceRange(); | ||||
5468 | return true; | ||||
5469 | } | ||||
5470 | if (!En.first) { | ||||
5471 | En.first = Child; | ||||
5472 | En.second = Init; | ||||
5473 | } | ||||
5474 | if (!Parent->isAnonymousStructOrUnion()) | ||||
5475 | return false; | ||||
5476 | } | ||||
5477 | |||||
5478 | Child = Parent; | ||||
5479 | Parent = cast<RecordDecl>(Parent->getDeclContext()); | ||||
5480 | } | ||||
5481 | |||||
5482 | return false; | ||||
5483 | } | ||||
5484 | } // namespace | ||||
5485 | |||||
5486 | /// ActOnMemInitializers - Handle the member initializers for a constructor. | ||||
5487 | void Sema::ActOnMemInitializers(Decl *ConstructorDecl, | ||||
5488 | SourceLocation ColonLoc, | ||||
5489 | ArrayRef<CXXCtorInitializer*> MemInits, | ||||
5490 | bool AnyErrors) { | ||||
5491 | if (!ConstructorDecl) | ||||
5492 | return; | ||||
5493 | |||||
5494 | AdjustDeclIfTemplate(ConstructorDecl); | ||||
5495 | |||||
5496 | CXXConstructorDecl *Constructor | ||||
5497 | = dyn_cast<CXXConstructorDecl>(ConstructorDecl); | ||||
5498 | |||||
5499 | if (!Constructor) { | ||||
5500 | Diag(ColonLoc, diag::err_only_constructors_take_base_inits); | ||||
5501 | return; | ||||
5502 | } | ||||
5503 | |||||
5504 | // Mapping for the duplicate initializers check. | ||||
5505 | // For member initializers, this is keyed with a FieldDecl*. | ||||
5506 | // For base initializers, this is keyed with a Type*. | ||||
5507 | llvm::DenseMap<const void *, CXXCtorInitializer *> Members; | ||||
5508 | |||||
5509 | // Mapping for the inconsistent anonymous-union initializers check. | ||||
5510 | RedundantUnionMap MemberUnions; | ||||
5511 | |||||
5512 | bool HadError = false; | ||||
5513 | for (unsigned i = 0; i < MemInits.size(); i++) { | ||||
5514 | CXXCtorInitializer *Init = MemInits[i]; | ||||
5515 | |||||
5516 | // Set the source order index. | ||||
5517 | Init->setSourceOrder(i); | ||||
5518 | |||||
5519 | if (Init->isAnyMemberInitializer()) { | ||||
5520 | const void *Key = GetKeyForMember(Context, Init); | ||||
5521 | if (CheckRedundantInit(*this, Init, Members[Key]) || | ||||
5522 | CheckRedundantUnionInit(*this, Init, MemberUnions)) | ||||
5523 | HadError = true; | ||||
5524 | } else if (Init->isBaseInitializer()) { | ||||
5525 | const void *Key = GetKeyForMember(Context, Init); | ||||
5526 | if (CheckRedundantInit(*this, Init, Members[Key])) | ||||
5527 | HadError = true; | ||||
5528 | } else { | ||||
5529 | assert(Init->isDelegatingInitializer())(static_cast <bool> (Init->isDelegatingInitializer() ) ? void (0) : __assert_fail ("Init->isDelegatingInitializer()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5529, __extension__ __PRETTY_FUNCTION__)); | ||||
5530 | // This must be the only initializer | ||||
5531 | if (MemInits.size() != 1) { | ||||
5532 | Diag(Init->getSourceLocation(), | ||||
5533 | diag::err_delegating_initializer_alone) | ||||
5534 | << Init->getSourceRange() << MemInits[i ? 0 : 1]->getSourceRange(); | ||||
5535 | // We will treat this as being the only initializer. | ||||
5536 | } | ||||
5537 | SetDelegatingInitializer(Constructor, MemInits[i]); | ||||
5538 | // Return immediately as the initializer is set. | ||||
5539 | return; | ||||
5540 | } | ||||
5541 | } | ||||
5542 | |||||
5543 | if (HadError) | ||||
5544 | return; | ||||
5545 | |||||
5546 | DiagnoseBaseOrMemInitializerOrder(*this, Constructor, MemInits); | ||||
5547 | |||||
5548 | SetCtorInitializers(Constructor, AnyErrors, MemInits); | ||||
5549 | |||||
5550 | DiagnoseUninitializedFields(*this, Constructor); | ||||
5551 | } | ||||
5552 | |||||
5553 | void | ||||
5554 | Sema::MarkBaseAndMemberDestructorsReferenced(SourceLocation Location, | ||||
5555 | CXXRecordDecl *ClassDecl) { | ||||
5556 | // Ignore dependent contexts. Also ignore unions, since their members never | ||||
5557 | // have destructors implicitly called. | ||||
5558 | if (ClassDecl->isDependentContext() || ClassDecl->isUnion()) | ||||
5559 | return; | ||||
5560 | |||||
5561 | // FIXME: all the access-control diagnostics are positioned on the | ||||
5562 | // field/base declaration. That's probably good; that said, the | ||||
5563 | // user might reasonably want to know why the destructor is being | ||||
5564 | // emitted, and we currently don't say. | ||||
5565 | |||||
5566 | // Non-static data members. | ||||
5567 | for (auto *Field : ClassDecl->fields()) { | ||||
5568 | if (Field->isInvalidDecl()) | ||||
5569 | continue; | ||||
5570 | |||||
5571 | // Don't destroy incomplete or zero-length arrays. | ||||
5572 | if (isIncompleteOrZeroLengthArrayType(Context, Field->getType())) | ||||
5573 | continue; | ||||
5574 | |||||
5575 | QualType FieldType = Context.getBaseElementType(Field->getType()); | ||||
5576 | |||||
5577 | const RecordType* RT = FieldType->getAs<RecordType>(); | ||||
5578 | if (!RT) | ||||
5579 | continue; | ||||
5580 | |||||
5581 | CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||
5582 | if (FieldClassDecl->isInvalidDecl()) | ||||
5583 | continue; | ||||
5584 | if (FieldClassDecl->hasIrrelevantDestructor()) | ||||
5585 | continue; | ||||
5586 | // The destructor for an implicit anonymous union member is never invoked. | ||||
5587 | if (FieldClassDecl->isUnion() && FieldClassDecl->isAnonymousStructOrUnion()) | ||||
5588 | continue; | ||||
5589 | |||||
5590 | CXXDestructorDecl *Dtor = LookupDestructor(FieldClassDecl); | ||||
5591 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5591, __extension__ __PRETTY_FUNCTION__)); | ||||
5592 | CheckDestructorAccess(Field->getLocation(), Dtor, | ||||
5593 | PDiag(diag::err_access_dtor_field) | ||||
5594 | << Field->getDeclName() | ||||
5595 | << FieldType); | ||||
5596 | |||||
5597 | MarkFunctionReferenced(Location, Dtor); | ||||
5598 | DiagnoseUseOfDecl(Dtor, Location); | ||||
5599 | } | ||||
5600 | |||||
5601 | // We only potentially invoke the destructors of potentially constructed | ||||
5602 | // subobjects. | ||||
5603 | bool VisitVirtualBases = !ClassDecl->isAbstract(); | ||||
5604 | |||||
5605 | // If the destructor exists and has already been marked used in the MS ABI, | ||||
5606 | // then virtual base destructors have already been checked and marked used. | ||||
5607 | // Skip checking them again to avoid duplicate diagnostics. | ||||
5608 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||
5609 | CXXDestructorDecl *Dtor = ClassDecl->getDestructor(); | ||||
5610 | if (Dtor && Dtor->isUsed()) | ||||
5611 | VisitVirtualBases = false; | ||||
5612 | } | ||||
5613 | |||||
5614 | llvm::SmallPtrSet<const RecordType *, 8> DirectVirtualBases; | ||||
5615 | |||||
5616 | // Bases. | ||||
5617 | for (const auto &Base : ClassDecl->bases()) { | ||||
5618 | const RecordType *RT = Base.getType()->getAs<RecordType>(); | ||||
5619 | if (!RT) | ||||
5620 | continue; | ||||
5621 | |||||
5622 | // Remember direct virtual bases. | ||||
5623 | if (Base.isVirtual()) { | ||||
5624 | if (!VisitVirtualBases) | ||||
5625 | continue; | ||||
5626 | DirectVirtualBases.insert(RT); | ||||
5627 | } | ||||
5628 | |||||
5629 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||
5630 | // If our base class is invalid, we probably can't get its dtor anyway. | ||||
5631 | if (BaseClassDecl->isInvalidDecl()) | ||||
5632 | continue; | ||||
5633 | if (BaseClassDecl->hasIrrelevantDestructor()) | ||||
5634 | continue; | ||||
5635 | |||||
5636 | CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl); | ||||
5637 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5637, __extension__ __PRETTY_FUNCTION__)); | ||||
5638 | |||||
5639 | // FIXME: caret should be on the start of the class name | ||||
5640 | CheckDestructorAccess(Base.getBeginLoc(), Dtor, | ||||
5641 | PDiag(diag::err_access_dtor_base) | ||||
5642 | << Base.getType() << Base.getSourceRange(), | ||||
5643 | Context.getTypeDeclType(ClassDecl)); | ||||
5644 | |||||
5645 | MarkFunctionReferenced(Location, Dtor); | ||||
5646 | DiagnoseUseOfDecl(Dtor, Location); | ||||
5647 | } | ||||
5648 | |||||
5649 | if (VisitVirtualBases) | ||||
5650 | MarkVirtualBaseDestructorsReferenced(Location, ClassDecl, | ||||
5651 | &DirectVirtualBases); | ||||
5652 | } | ||||
5653 | |||||
5654 | void Sema::MarkVirtualBaseDestructorsReferenced( | ||||
5655 | SourceLocation Location, CXXRecordDecl *ClassDecl, | ||||
5656 | llvm::SmallPtrSetImpl<const RecordType *> *DirectVirtualBases) { | ||||
5657 | // Virtual bases. | ||||
5658 | for (const auto &VBase : ClassDecl->vbases()) { | ||||
5659 | // Bases are always records in a well-formed non-dependent class. | ||||
5660 | const RecordType *RT = VBase.getType()->castAs<RecordType>(); | ||||
5661 | |||||
5662 | // Ignore already visited direct virtual bases. | ||||
5663 | if (DirectVirtualBases && DirectVirtualBases->count(RT)) | ||||
5664 | continue; | ||||
5665 | |||||
5666 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||
5667 | // If our base class is invalid, we probably can't get its dtor anyway. | ||||
5668 | if (BaseClassDecl->isInvalidDecl()) | ||||
5669 | continue; | ||||
5670 | if (BaseClassDecl->hasIrrelevantDestructor()) | ||||
5671 | continue; | ||||
5672 | |||||
5673 | CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl); | ||||
5674 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5674, __extension__ __PRETTY_FUNCTION__)); | ||||
5675 | if (CheckDestructorAccess( | ||||
5676 | ClassDecl->getLocation(), Dtor, | ||||
5677 | PDiag(diag::err_access_dtor_vbase) | ||||
5678 | << Context.getTypeDeclType(ClassDecl) << VBase.getType(), | ||||
5679 | Context.getTypeDeclType(ClassDecl)) == | ||||
5680 | AR_accessible) { | ||||
5681 | CheckDerivedToBaseConversion( | ||||
5682 | Context.getTypeDeclType(ClassDecl), VBase.getType(), | ||||
5683 | diag::err_access_dtor_vbase, 0, ClassDecl->getLocation(), | ||||
5684 | SourceRange(), DeclarationName(), nullptr); | ||||
5685 | } | ||||
5686 | |||||
5687 | MarkFunctionReferenced(Location, Dtor); | ||||
5688 | DiagnoseUseOfDecl(Dtor, Location); | ||||
5689 | } | ||||
5690 | } | ||||
5691 | |||||
5692 | void Sema::ActOnDefaultCtorInitializers(Decl *CDtorDecl) { | ||||
5693 | if (!CDtorDecl) | ||||
5694 | return; | ||||
5695 | |||||
5696 | if (CXXConstructorDecl *Constructor | ||||
5697 | = dyn_cast<CXXConstructorDecl>(CDtorDecl)) { | ||||
5698 | SetCtorInitializers(Constructor, /*AnyErrors=*/false); | ||||
5699 | DiagnoseUninitializedFields(*this, Constructor); | ||||
5700 | } | ||||
5701 | } | ||||
5702 | |||||
5703 | bool Sema::isAbstractType(SourceLocation Loc, QualType T) { | ||||
5704 | if (!getLangOpts().CPlusPlus) | ||||
5705 | return false; | ||||
5706 | |||||
5707 | const auto *RD = Context.getBaseElementType(T)->getAsCXXRecordDecl(); | ||||
5708 | if (!RD) | ||||
5709 | return false; | ||||
5710 | |||||
5711 | // FIXME: Per [temp.inst]p1, we are supposed to trigger instantiation of a | ||||
5712 | // class template specialization here, but doing so breaks a lot of code. | ||||
5713 | |||||
5714 | // We can't answer whether something is abstract until it has a | ||||
5715 | // definition. If it's currently being defined, we'll walk back | ||||
5716 | // over all the declarations when we have a full definition. | ||||
5717 | const CXXRecordDecl *Def = RD->getDefinition(); | ||||
5718 | if (!Def || Def->isBeingDefined()) | ||||
5719 | return false; | ||||
5720 | |||||
5721 | return RD->isAbstract(); | ||||
5722 | } | ||||
5723 | |||||
5724 | bool Sema::RequireNonAbstractType(SourceLocation Loc, QualType T, | ||||
5725 | TypeDiagnoser &Diagnoser) { | ||||
5726 | if (!isAbstractType(Loc, T)) | ||||
5727 | return false; | ||||
5728 | |||||
5729 | T = Context.getBaseElementType(T); | ||||
5730 | Diagnoser.diagnose(*this, Loc, T); | ||||
5731 | DiagnoseAbstractType(T->getAsCXXRecordDecl()); | ||||
5732 | return true; | ||||
5733 | } | ||||
5734 | |||||
5735 | void Sema::DiagnoseAbstractType(const CXXRecordDecl *RD) { | ||||
5736 | // Check if we've already emitted the list of pure virtual functions | ||||
5737 | // for this class. | ||||
5738 | if (PureVirtualClassDiagSet && PureVirtualClassDiagSet->count(RD)) | ||||
5739 | return; | ||||
5740 | |||||
5741 | // If the diagnostic is suppressed, don't emit the notes. We're only | ||||
5742 | // going to emit them once, so try to attach them to a diagnostic we're | ||||
5743 | // actually going to show. | ||||
5744 | if (Diags.isLastDiagnosticIgnored()) | ||||
5745 | return; | ||||
5746 | |||||
5747 | CXXFinalOverriderMap FinalOverriders; | ||||
5748 | RD->getFinalOverriders(FinalOverriders); | ||||
5749 | |||||
5750 | // Keep a set of seen pure methods so we won't diagnose the same method | ||||
5751 | // more than once. | ||||
5752 | llvm::SmallPtrSet<const CXXMethodDecl *, 8> SeenPureMethods; | ||||
5753 | |||||
5754 | for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(), | ||||
5755 | MEnd = FinalOverriders.end(); | ||||
5756 | M != MEnd; | ||||
5757 | ++M) { | ||||
5758 | for (OverridingMethods::iterator SO = M->second.begin(), | ||||
5759 | SOEnd = M->second.end(); | ||||
5760 | SO != SOEnd; ++SO) { | ||||
5761 | // C++ [class.abstract]p4: | ||||
5762 | // A class is abstract if it contains or inherits at least one | ||||
5763 | // pure virtual function for which the final overrider is pure | ||||
5764 | // virtual. | ||||
5765 | |||||
5766 | // | ||||
5767 | if (SO->second.size() != 1) | ||||
5768 | continue; | ||||
5769 | |||||
5770 | if (!SO->second.front().Method->isPure()) | ||||
5771 | continue; | ||||
5772 | |||||
5773 | if (!SeenPureMethods.insert(SO->second.front().Method).second) | ||||
5774 | continue; | ||||
5775 | |||||
5776 | Diag(SO->second.front().Method->getLocation(), | ||||
5777 | diag::note_pure_virtual_function) | ||||
5778 | << SO->second.front().Method->getDeclName() << RD->getDeclName(); | ||||
5779 | } | ||||
5780 | } | ||||
5781 | |||||
5782 | if (!PureVirtualClassDiagSet) | ||||
5783 | PureVirtualClassDiagSet.reset(new RecordDeclSetTy); | ||||
5784 | PureVirtualClassDiagSet->insert(RD); | ||||
5785 | } | ||||
5786 | |||||
5787 | namespace { | ||||
5788 | struct AbstractUsageInfo { | ||||
5789 | Sema &S; | ||||
5790 | CXXRecordDecl *Record; | ||||
5791 | CanQualType AbstractType; | ||||
5792 | bool Invalid; | ||||
5793 | |||||
5794 | AbstractUsageInfo(Sema &S, CXXRecordDecl *Record) | ||||
5795 | : S(S), Record(Record), | ||||
5796 | AbstractType(S.Context.getCanonicalType( | ||||
5797 | S.Context.getTypeDeclType(Record))), | ||||
5798 | Invalid(false) {} | ||||
5799 | |||||
5800 | void DiagnoseAbstractType() { | ||||
5801 | if (Invalid) return; | ||||
5802 | S.DiagnoseAbstractType(Record); | ||||
5803 | Invalid = true; | ||||
5804 | } | ||||
5805 | |||||
5806 | void CheckType(const NamedDecl *D, TypeLoc TL, Sema::AbstractDiagSelID Sel); | ||||
5807 | }; | ||||
5808 | |||||
5809 | struct CheckAbstractUsage { | ||||
5810 | AbstractUsageInfo &Info; | ||||
5811 | const NamedDecl *Ctx; | ||||
5812 | |||||
5813 | CheckAbstractUsage(AbstractUsageInfo &Info, const NamedDecl *Ctx) | ||||
5814 | : Info(Info), Ctx(Ctx) {} | ||||
5815 | |||||
5816 | void Visit(TypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||
5817 | switch (TL.getTypeLocClass()) { | ||||
5818 | #define ABSTRACT_TYPELOC(CLASS, PARENT) | ||||
5819 | #define TYPELOC(CLASS, PARENT) \ | ||||
5820 | case TypeLoc::CLASS: Check(TL.castAs<CLASS##TypeLoc>(), Sel); break; | ||||
5821 | #include "clang/AST/TypeLocNodes.def" | ||||
5822 | } | ||||
5823 | } | ||||
5824 | |||||
5825 | void Check(FunctionProtoTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||
5826 | Visit(TL.getReturnLoc(), Sema::AbstractReturnType); | ||||
5827 | for (unsigned I = 0, E = TL.getNumParams(); I != E; ++I) { | ||||
5828 | if (!TL.getParam(I)) | ||||
5829 | continue; | ||||
5830 | |||||
5831 | TypeSourceInfo *TSI = TL.getParam(I)->getTypeSourceInfo(); | ||||
5832 | if (TSI) Visit(TSI->getTypeLoc(), Sema::AbstractParamType); | ||||
5833 | } | ||||
5834 | } | ||||
5835 | |||||
5836 | void Check(ArrayTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||
5837 | Visit(TL.getElementLoc(), Sema::AbstractArrayType); | ||||
5838 | } | ||||
5839 | |||||
5840 | void Check(TemplateSpecializationTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||
5841 | // Visit the type parameters from a permissive context. | ||||
5842 | for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) { | ||||
5843 | TemplateArgumentLoc TAL = TL.getArgLoc(I); | ||||
5844 | if (TAL.getArgument().getKind() == TemplateArgument::Type) | ||||
5845 | if (TypeSourceInfo *TSI = TAL.getTypeSourceInfo()) | ||||
5846 | Visit(TSI->getTypeLoc(), Sema::AbstractNone); | ||||
5847 | // TODO: other template argument types? | ||||
5848 | } | ||||
5849 | } | ||||
5850 | |||||
5851 | // Visit pointee types from a permissive context. | ||||
5852 | #define CheckPolymorphic(Type)void Check(Type TL, Sema::AbstractDiagSelID Sel) { Visit(TL.getNextTypeLoc (), Sema::AbstractNone); } \ | ||||
5853 | void Check(Type TL, Sema::AbstractDiagSelID Sel) { \ | ||||
5854 | Visit(TL.getNextTypeLoc(), Sema::AbstractNone); \ | ||||
5855 | } | ||||
5856 | CheckPolymorphic(PointerTypeLoc)void Check(PointerTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit (TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||
5857 | CheckPolymorphic(ReferenceTypeLoc)void Check(ReferenceTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||
5858 | CheckPolymorphic(MemberPointerTypeLoc)void Check(MemberPointerTypeLoc TL, Sema::AbstractDiagSelID Sel ) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||
5859 | CheckPolymorphic(BlockPointerTypeLoc)void Check(BlockPointerTypeLoc TL, Sema::AbstractDiagSelID Sel ) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||
5860 | CheckPolymorphic(AtomicTypeLoc)void Check(AtomicTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit (TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||
5861 | |||||
5862 | /// Handle all the types we haven't given a more specific | ||||
5863 | /// implementation for above. | ||||
5864 | void Check(TypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||
5865 | // Every other kind of type that we haven't called out already | ||||
5866 | // that has an inner type is either (1) sugar or (2) contains that | ||||
5867 | // inner type in some way as a subobject. | ||||
5868 | if (TypeLoc Next = TL.getNextTypeLoc()) | ||||
5869 | return Visit(Next, Sel); | ||||
5870 | |||||
5871 | // If there's no inner type and we're in a permissive context, | ||||
5872 | // don't diagnose. | ||||
5873 | if (Sel == Sema::AbstractNone) return; | ||||
5874 | |||||
5875 | // Check whether the type matches the abstract type. | ||||
5876 | QualType T = TL.getType(); | ||||
5877 | if (T->isArrayType()) { | ||||
5878 | Sel = Sema::AbstractArrayType; | ||||
5879 | T = Info.S.Context.getBaseElementType(T); | ||||
5880 | } | ||||
5881 | CanQualType CT = T->getCanonicalTypeUnqualified().getUnqualifiedType(); | ||||
5882 | if (CT != Info.AbstractType) return; | ||||
5883 | |||||
5884 | // It matched; do some magic. | ||||
5885 | if (Sel == Sema::AbstractArrayType) { | ||||
5886 | Info.S.Diag(Ctx->getLocation(), diag::err_array_of_abstract_type) | ||||
5887 | << T << TL.getSourceRange(); | ||||
5888 | } else { | ||||
5889 | Info.S.Diag(Ctx->getLocation(), diag::err_abstract_type_in_decl) | ||||
5890 | << Sel << T << TL.getSourceRange(); | ||||
5891 | } | ||||
5892 | Info.DiagnoseAbstractType(); | ||||
5893 | } | ||||
5894 | }; | ||||
5895 | |||||
5896 | void AbstractUsageInfo::CheckType(const NamedDecl *D, TypeLoc TL, | ||||
5897 | Sema::AbstractDiagSelID Sel) { | ||||
5898 | CheckAbstractUsage(*this, D).Visit(TL, Sel); | ||||
5899 | } | ||||
5900 | |||||
5901 | } | ||||
5902 | |||||
5903 | /// Check for invalid uses of an abstract type in a method declaration. | ||||
5904 | static void CheckAbstractClassUsage(AbstractUsageInfo &Info, | ||||
5905 | CXXMethodDecl *MD) { | ||||
5906 | // No need to do the check on definitions, which require that | ||||
5907 | // the return/param types be complete. | ||||
5908 | if (MD->doesThisDeclarationHaveABody()) | ||||
5909 | return; | ||||
5910 | |||||
5911 | // For safety's sake, just ignore it if we don't have type source | ||||
5912 | // information. This should never happen for non-implicit methods, | ||||
5913 | // but... | ||||
5914 | if (TypeSourceInfo *TSI = MD->getTypeSourceInfo()) | ||||
5915 | Info.CheckType(MD, TSI->getTypeLoc(), Sema::AbstractNone); | ||||
5916 | } | ||||
5917 | |||||
5918 | /// Check for invalid uses of an abstract type within a class definition. | ||||
5919 | static void CheckAbstractClassUsage(AbstractUsageInfo &Info, | ||||
5920 | CXXRecordDecl *RD) { | ||||
5921 | for (auto *D : RD->decls()) { | ||||
5922 | if (D->isImplicit()) continue; | ||||
5923 | |||||
5924 | // Methods and method templates. | ||||
5925 | if (isa<CXXMethodDecl>(D)) { | ||||
5926 | CheckAbstractClassUsage(Info, cast<CXXMethodDecl>(D)); | ||||
5927 | } else if (isa<FunctionTemplateDecl>(D)) { | ||||
5928 | FunctionDecl *FD = cast<FunctionTemplateDecl>(D)->getTemplatedDecl(); | ||||
5929 | CheckAbstractClassUsage(Info, cast<CXXMethodDecl>(FD)); | ||||
5930 | |||||
5931 | // Fields and static variables. | ||||
5932 | } else if (isa<FieldDecl>(D)) { | ||||
5933 | FieldDecl *FD = cast<FieldDecl>(D); | ||||
5934 | if (TypeSourceInfo *TSI = FD->getTypeSourceInfo()) | ||||
5935 | Info.CheckType(FD, TSI->getTypeLoc(), Sema::AbstractFieldType); | ||||
5936 | } else if (isa<VarDecl>(D)) { | ||||
5937 | VarDecl *VD = cast<VarDecl>(D); | ||||
5938 | if (TypeSourceInfo *TSI = VD->getTypeSourceInfo()) | ||||
5939 | Info.CheckType(VD, TSI->getTypeLoc(), Sema::AbstractVariableType); | ||||
5940 | |||||
5941 | // Nested classes and class templates. | ||||
5942 | } else if (isa<CXXRecordDecl>(D)) { | ||||
5943 | CheckAbstractClassUsage(Info, cast<CXXRecordDecl>(D)); | ||||
5944 | } else if (isa<ClassTemplateDecl>(D)) { | ||||
5945 | CheckAbstractClassUsage(Info, | ||||
5946 | cast<ClassTemplateDecl>(D)->getTemplatedDecl()); | ||||
5947 | } | ||||
5948 | } | ||||
5949 | } | ||||
5950 | |||||
5951 | static void ReferenceDllExportedMembers(Sema &S, CXXRecordDecl *Class) { | ||||
5952 | Attr *ClassAttr = getDLLAttr(Class); | ||||
5953 | if (!ClassAttr) | ||||
5954 | return; | ||||
5955 | |||||
5956 | assert(ClassAttr->getKind() == attr::DLLExport)(static_cast <bool> (ClassAttr->getKind() == attr::DLLExport ) ? void (0) : __assert_fail ("ClassAttr->getKind() == attr::DLLExport" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 5956, __extension__ __PRETTY_FUNCTION__)); | ||||
5957 | |||||
5958 | TemplateSpecializationKind TSK = Class->getTemplateSpecializationKind(); | ||||
5959 | |||||
5960 | if (TSK == TSK_ExplicitInstantiationDeclaration) | ||||
5961 | // Don't go any further if this is just an explicit instantiation | ||||
5962 | // declaration. | ||||
5963 | return; | ||||
5964 | |||||
5965 | // Add a context note to explain how we got to any diagnostics produced below. | ||||
5966 | struct MarkingClassDllexported { | ||||
5967 | Sema &S; | ||||
5968 | MarkingClassDllexported(Sema &S, CXXRecordDecl *Class, | ||||
5969 | SourceLocation AttrLoc) | ||||
5970 | : S(S) { | ||||
5971 | Sema::CodeSynthesisContext Ctx; | ||||
5972 | Ctx.Kind = Sema::CodeSynthesisContext::MarkingClassDllexported; | ||||
5973 | Ctx.PointOfInstantiation = AttrLoc; | ||||
5974 | Ctx.Entity = Class; | ||||
5975 | S.pushCodeSynthesisContext(Ctx); | ||||
5976 | } | ||||
5977 | ~MarkingClassDllexported() { | ||||
5978 | S.popCodeSynthesisContext(); | ||||
5979 | } | ||||
5980 | } MarkingDllexportedContext(S, Class, ClassAttr->getLocation()); | ||||
5981 | |||||
5982 | if (S.Context.getTargetInfo().getTriple().isWindowsGNUEnvironment()) | ||||
5983 | S.MarkVTableUsed(Class->getLocation(), Class, true); | ||||
5984 | |||||
5985 | for (Decl *Member : Class->decls()) { | ||||
5986 | // Skip members that were not marked exported. | ||||
5987 | if (!Member->hasAttr<DLLExportAttr>()) | ||||
5988 | continue; | ||||
5989 | |||||
5990 | // Defined static variables that are members of an exported base | ||||
5991 | // class must be marked export too. | ||||
5992 | auto *VD = dyn_cast<VarDecl>(Member); | ||||
5993 | if (VD && VD->getStorageClass() == SC_Static && | ||||
5994 | TSK == TSK_ImplicitInstantiation) | ||||
5995 | S.MarkVariableReferenced(VD->getLocation(), VD); | ||||
5996 | |||||
5997 | auto *MD = dyn_cast<CXXMethodDecl>(Member); | ||||
5998 | if (!MD) | ||||
5999 | continue; | ||||
6000 | |||||
6001 | if (MD->isUserProvided()) { | ||||
6002 | // Instantiate non-default class member functions ... | ||||
6003 | |||||
6004 | // .. except for certain kinds of template specializations. | ||||
6005 | if (TSK == TSK_ImplicitInstantiation && !ClassAttr->isInherited()) | ||||
6006 | continue; | ||||
6007 | |||||
6008 | // If this is an MS ABI dllexport default constructor, instantiate any | ||||
6009 | // default arguments. | ||||
6010 | if (S.Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||
6011 | auto *CD = dyn_cast<CXXConstructorDecl>(MD); | ||||
6012 | if (CD && CD->isDefaultConstructor() && TSK == TSK_Undeclared) { | ||||
6013 | S.InstantiateDefaultCtorDefaultArgs(CD); | ||||
6014 | } | ||||
6015 | } | ||||
6016 | |||||
6017 | S.MarkFunctionReferenced(Class->getLocation(), MD); | ||||
6018 | |||||
6019 | // The function will be passed to the consumer when its definition is | ||||
6020 | // encountered. | ||||
6021 | } else if (MD->isExplicitlyDefaulted()) { | ||||
6022 | // Synthesize and instantiate explicitly defaulted methods. | ||||
6023 | S.MarkFunctionReferenced(Class->getLocation(), MD); | ||||
6024 | |||||
6025 | if (TSK != TSK_ExplicitInstantiationDefinition) { | ||||
6026 | // Except for explicit instantiation defs, we will not see the | ||||
6027 | // definition again later, so pass it to the consumer now. | ||||
6028 | S.Consumer.HandleTopLevelDecl(DeclGroupRef(MD)); | ||||
6029 | } | ||||
6030 | } else if (!MD->isTrivial() || | ||||
6031 | MD->isCopyAssignmentOperator() || | ||||
6032 | MD->isMoveAssignmentOperator()) { | ||||
6033 | // Synthesize and instantiate non-trivial implicit methods, and the copy | ||||
6034 | // and move assignment operators. The latter are exported even if they | ||||
6035 | // are trivial, because the address of an operator can be taken and | ||||
6036 | // should compare equal across libraries. | ||||
6037 | S.MarkFunctionReferenced(Class->getLocation(), MD); | ||||
6038 | |||||
6039 | // There is no later point when we will see the definition of this | ||||
6040 | // function, so pass it to the consumer now. | ||||
6041 | S.Consumer.HandleTopLevelDecl(DeclGroupRef(MD)); | ||||
6042 | } | ||||
6043 | } | ||||
6044 | } | ||||
6045 | |||||
6046 | static void checkForMultipleExportedDefaultConstructors(Sema &S, | ||||
6047 | CXXRecordDecl *Class) { | ||||
6048 | // Only the MS ABI has default constructor closures, so we don't need to do | ||||
6049 | // this semantic checking anywhere else. | ||||
6050 | if (!S.Context.getTargetInfo().getCXXABI().isMicrosoft()) | ||||
6051 | return; | ||||
6052 | |||||
6053 | CXXConstructorDecl *LastExportedDefaultCtor = nullptr; | ||||
6054 | for (Decl *Member : Class->decls()) { | ||||
6055 | // Look for exported default constructors. | ||||
6056 | auto *CD = dyn_cast<CXXConstructorDecl>(Member); | ||||
6057 | if (!CD || !CD->isDefaultConstructor()) | ||||
6058 | continue; | ||||
6059 | auto *Attr = CD->getAttr<DLLExportAttr>(); | ||||
6060 | if (!Attr) | ||||
6061 | continue; | ||||
6062 | |||||
6063 | // If the class is non-dependent, mark the default arguments as ODR-used so | ||||
6064 | // that we can properly codegen the constructor closure. | ||||
6065 | if (!Class->isDependentContext()) { | ||||
6066 | for (ParmVarDecl *PD : CD->parameters()) { | ||||
6067 | (void)S.CheckCXXDefaultArgExpr(Attr->getLocation(), CD, PD); | ||||
6068 | S.DiscardCleanupsInEvaluationContext(); | ||||
6069 | } | ||||
6070 | } | ||||
6071 | |||||
6072 | if (LastExportedDefaultCtor) { | ||||
6073 | S.Diag(LastExportedDefaultCtor->getLocation(), | ||||
6074 | diag::err_attribute_dll_ambiguous_default_ctor) | ||||
6075 | << Class; | ||||
6076 | S.Diag(CD->getLocation(), diag::note_entity_declared_at) | ||||
6077 | << CD->getDeclName(); | ||||
6078 | return; | ||||
6079 | } | ||||
6080 | LastExportedDefaultCtor = CD; | ||||
6081 | } | ||||
6082 | } | ||||
6083 | |||||
6084 | static void checkCUDADeviceBuiltinSurfaceClassTemplate(Sema &S, | ||||
6085 | CXXRecordDecl *Class) { | ||||
6086 | bool ErrorReported = false; | ||||
6087 | auto reportIllegalClassTemplate = [&ErrorReported](Sema &S, | ||||
6088 | ClassTemplateDecl *TD) { | ||||
6089 | if (ErrorReported) | ||||
6090 | return; | ||||
6091 | S.Diag(TD->getLocation(), | ||||
6092 | diag::err_cuda_device_builtin_surftex_cls_template) | ||||
6093 | << /*surface*/ 0 << TD; | ||||
6094 | ErrorReported = true; | ||||
6095 | }; | ||||
6096 | |||||
6097 | ClassTemplateDecl *TD = Class->getDescribedClassTemplate(); | ||||
6098 | if (!TD) { | ||||
6099 | auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(Class); | ||||
6100 | if (!SD) { | ||||
6101 | S.Diag(Class->getLocation(), | ||||
6102 | diag::err_cuda_device_builtin_surftex_ref_decl) | ||||
6103 | << /*surface*/ 0 << Class; | ||||
6104 | S.Diag(Class->getLocation(), | ||||
6105 | diag::note_cuda_device_builtin_surftex_should_be_template_class) | ||||
6106 | << Class; | ||||
6107 | return; | ||||
6108 | } | ||||
6109 | TD = SD->getSpecializedTemplate(); | ||||
6110 | } | ||||
6111 | |||||
6112 | TemplateParameterList *Params = TD->getTemplateParameters(); | ||||
6113 | unsigned N = Params->size(); | ||||
6114 | |||||
6115 | if (N != 2) { | ||||
6116 | reportIllegalClassTemplate(S, TD); | ||||
6117 | S.Diag(TD->getLocation(), | ||||
6118 | diag::note_cuda_device_builtin_surftex_cls_should_have_n_args) | ||||
6119 | << TD << 2; | ||||
6120 | } | ||||
6121 | if (N > 0 && !isa<TemplateTypeParmDecl>(Params->getParam(0))) { | ||||
6122 | reportIllegalClassTemplate(S, TD); | ||||
6123 | S.Diag(TD->getLocation(), | ||||
6124 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||
6125 | << TD << /*1st*/ 0 << /*type*/ 0; | ||||
6126 | } | ||||
6127 | if (N > 1) { | ||||
6128 | auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Params->getParam(1)); | ||||
6129 | if (!NTTP || !NTTP->getType()->isIntegralOrEnumerationType()) { | ||||
6130 | reportIllegalClassTemplate(S, TD); | ||||
6131 | S.Diag(TD->getLocation(), | ||||
6132 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||
6133 | << TD << /*2nd*/ 1 << /*integer*/ 1; | ||||
6134 | } | ||||
6135 | } | ||||
6136 | } | ||||
6137 | |||||
6138 | static void checkCUDADeviceBuiltinTextureClassTemplate(Sema &S, | ||||
6139 | CXXRecordDecl *Class) { | ||||
6140 | bool ErrorReported = false; | ||||
6141 | auto reportIllegalClassTemplate = [&ErrorReported](Sema &S, | ||||
6142 | ClassTemplateDecl *TD) { | ||||
6143 | if (ErrorReported) | ||||
6144 | return; | ||||
6145 | S.Diag(TD->getLocation(), | ||||
6146 | diag::err_cuda_device_builtin_surftex_cls_template) | ||||
6147 | << /*texture*/ 1 << TD; | ||||
6148 | ErrorReported = true; | ||||
6149 | }; | ||||
6150 | |||||
6151 | ClassTemplateDecl *TD = Class->getDescribedClassTemplate(); | ||||
6152 | if (!TD) { | ||||
6153 | auto *SD = dyn_cast<ClassTemplateSpecializationDecl>(Class); | ||||
6154 | if (!SD) { | ||||
6155 | S.Diag(Class->getLocation(), | ||||
6156 | diag::err_cuda_device_builtin_surftex_ref_decl) | ||||
6157 | << /*texture*/ 1 << Class; | ||||
6158 | S.Diag(Class->getLocation(), | ||||
6159 | diag::note_cuda_device_builtin_surftex_should_be_template_class) | ||||
6160 | << Class; | ||||
6161 | return; | ||||
6162 | } | ||||
6163 | TD = SD->getSpecializedTemplate(); | ||||
6164 | } | ||||
6165 | |||||
6166 | TemplateParameterList *Params = TD->getTemplateParameters(); | ||||
6167 | unsigned N = Params->size(); | ||||
6168 | |||||
6169 | if (N != 3) { | ||||
6170 | reportIllegalClassTemplate(S, TD); | ||||
6171 | S.Diag(TD->getLocation(), | ||||
6172 | diag::note_cuda_device_builtin_surftex_cls_should_have_n_args) | ||||
6173 | << TD << 3; | ||||
6174 | } | ||||
6175 | if (N > 0 && !isa<TemplateTypeParmDecl>(Params->getParam(0))) { | ||||
6176 | reportIllegalClassTemplate(S, TD); | ||||
6177 | S.Diag(TD->getLocation(), | ||||
6178 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||
6179 | << TD << /*1st*/ 0 << /*type*/ 0; | ||||
6180 | } | ||||
6181 | if (N > 1) { | ||||
6182 | auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Params->getParam(1)); | ||||
6183 | if (!NTTP || !NTTP->getType()->isIntegralOrEnumerationType()) { | ||||
6184 | reportIllegalClassTemplate(S, TD); | ||||
6185 | S.Diag(TD->getLocation(), | ||||
6186 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||
6187 | << TD << /*2nd*/ 1 << /*integer*/ 1; | ||||
6188 | } | ||||
6189 | } | ||||
6190 | if (N > 2) { | ||||
6191 | auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(Params->getParam(2)); | ||||
6192 | if (!NTTP || !NTTP->getType()->isIntegralOrEnumerationType()) { | ||||
6193 | reportIllegalClassTemplate(S, TD); | ||||
6194 | S.Diag(TD->getLocation(), | ||||
6195 | diag::note_cuda_device_builtin_surftex_cls_should_have_match_arg) | ||||
6196 | << TD << /*3rd*/ 2 << /*integer*/ 1; | ||||
6197 | } | ||||
6198 | } | ||||
6199 | } | ||||
6200 | |||||
6201 | void Sema::checkClassLevelCodeSegAttribute(CXXRecordDecl *Class) { | ||||
6202 | // Mark any compiler-generated routines with the implicit code_seg attribute. | ||||
6203 | for (auto *Method : Class->methods()) { | ||||
6204 | if (Method->isUserProvided()) | ||||
6205 | continue; | ||||
6206 | if (Attr *A = getImplicitCodeSegOrSectionAttrForFunction(Method, /*IsDefinition=*/true)) | ||||
6207 | Method->addAttr(A); | ||||
6208 | } | ||||
6209 | } | ||||
6210 | |||||
6211 | /// Check class-level dllimport/dllexport attribute. | ||||
6212 | void Sema::checkClassLevelDLLAttribute(CXXRecordDecl *Class) { | ||||
6213 | Attr *ClassAttr = getDLLAttr(Class); | ||||
6214 | |||||
6215 | // MSVC inherits DLL attributes to partial class template specializations. | ||||
6216 | if (Context.getTargetInfo().shouldDLLImportComdatSymbols() && !ClassAttr) { | ||||
6217 | if (auto *Spec = dyn_cast<ClassTemplatePartialSpecializationDecl>(Class)) { | ||||
6218 | if (Attr *TemplateAttr = | ||||
6219 | getDLLAttr(Spec->getSpecializedTemplate()->getTemplatedDecl())) { | ||||
6220 | auto *A = cast<InheritableAttr>(TemplateAttr->clone(getASTContext())); | ||||
6221 | A->setInherited(true); | ||||
6222 | ClassAttr = A; | ||||
6223 | } | ||||
6224 | } | ||||
6225 | } | ||||
6226 | |||||
6227 | if (!ClassAttr) | ||||
6228 | return; | ||||
6229 | |||||
6230 | if (!Class->isExternallyVisible()) { | ||||
6231 | Diag(Class->getLocation(), diag::err_attribute_dll_not_extern) | ||||
6232 | << Class << ClassAttr; | ||||
6233 | return; | ||||
6234 | } | ||||
6235 | |||||
6236 | if (Context.getTargetInfo().shouldDLLImportComdatSymbols() && | ||||
6237 | !ClassAttr->isInherited()) { | ||||
6238 | // Diagnose dll attributes on members of class with dll attribute. | ||||
6239 | for (Decl *Member : Class->decls()) { | ||||
6240 | if (!isa<VarDecl>(Member) && !isa<CXXMethodDecl>(Member)) | ||||
6241 | continue; | ||||
6242 | InheritableAttr *MemberAttr = getDLLAttr(Member); | ||||
6243 | if (!MemberAttr || MemberAttr->isInherited() || Member->isInvalidDecl()) | ||||
6244 | continue; | ||||
6245 | |||||
6246 | Diag(MemberAttr->getLocation(), | ||||
6247 | diag::err_attribute_dll_member_of_dll_class) | ||||
6248 | << MemberAttr << ClassAttr; | ||||
6249 | Diag(ClassAttr->getLocation(), diag::note_previous_attribute); | ||||
6250 | Member->setInvalidDecl(); | ||||
6251 | } | ||||
6252 | } | ||||
6253 | |||||
6254 | if (Class->getDescribedClassTemplate()) | ||||
6255 | // Don't inherit dll attribute until the template is instantiated. | ||||
6256 | return; | ||||
6257 | |||||
6258 | // The class is either imported or exported. | ||||
6259 | const bool ClassExported = ClassAttr->getKind() == attr::DLLExport; | ||||
6260 | |||||
6261 | // Check if this was a dllimport attribute propagated from a derived class to | ||||
6262 | // a base class template specialization. We don't apply these attributes to | ||||
6263 | // static data members. | ||||
6264 | const bool PropagatedImport = | ||||
6265 | !ClassExported && | ||||
6266 | cast<DLLImportAttr>(ClassAttr)->wasPropagatedToBaseTemplate(); | ||||
6267 | |||||
6268 | TemplateSpecializationKind TSK = Class->getTemplateSpecializationKind(); | ||||
6269 | |||||
6270 | // Ignore explicit dllexport on explicit class template instantiation | ||||
6271 | // declarations, except in MinGW mode. | ||||
6272 | if (ClassExported && !ClassAttr->isInherited() && | ||||
6273 | TSK == TSK_ExplicitInstantiationDeclaration && | ||||
6274 | !Context.getTargetInfo().getTriple().isWindowsGNUEnvironment()) { | ||||
6275 | Class->dropAttr<DLLExportAttr>(); | ||||
6276 | return; | ||||
6277 | } | ||||
6278 | |||||
6279 | // Force declaration of implicit members so they can inherit the attribute. | ||||
6280 | ForceDeclarationOfImplicitMembers(Class); | ||||
6281 | |||||
6282 | // FIXME: MSVC's docs say all bases must be exportable, but this doesn't | ||||
6283 | // seem to be true in practice? | ||||
6284 | |||||
6285 | for (Decl *Member : Class->decls()) { | ||||
6286 | VarDecl *VD = dyn_cast<VarDecl>(Member); | ||||
6287 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Member); | ||||
6288 | |||||
6289 | // Only methods and static fields inherit the attributes. | ||||
6290 | if (!VD && !MD) | ||||
6291 | continue; | ||||
6292 | |||||
6293 | if (MD) { | ||||
6294 | // Don't process deleted methods. | ||||
6295 | if (MD->isDeleted()) | ||||
6296 | continue; | ||||
6297 | |||||
6298 | if (MD->isInlined()) { | ||||
6299 | // MinGW does not import or export inline methods. But do it for | ||||
6300 | // template instantiations. | ||||
6301 | if (!Context.getTargetInfo().shouldDLLImportComdatSymbols() && | ||||
6302 | TSK != TSK_ExplicitInstantiationDeclaration && | ||||
6303 | TSK != TSK_ExplicitInstantiationDefinition) | ||||
6304 | continue; | ||||
6305 | |||||
6306 | // MSVC versions before 2015 don't export the move assignment operators | ||||
6307 | // and move constructor, so don't attempt to import/export them if | ||||
6308 | // we have a definition. | ||||
6309 | auto *Ctor = dyn_cast<CXXConstructorDecl>(MD); | ||||
6310 | if ((MD->isMoveAssignmentOperator() || | ||||
6311 | (Ctor && Ctor->isMoveConstructor())) && | ||||
6312 | !getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015)) | ||||
6313 | continue; | ||||
6314 | |||||
6315 | // MSVC2015 doesn't export trivial defaulted x-tor but copy assign | ||||
6316 | // operator is exported anyway. | ||||
6317 | if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||
6318 | (Ctor || isa<CXXDestructorDecl>(MD)) && MD->isTrivial()) | ||||
6319 | continue; | ||||
6320 | } | ||||
6321 | } | ||||
6322 | |||||
6323 | // Don't apply dllimport attributes to static data members of class template | ||||
6324 | // instantiations when the attribute is propagated from a derived class. | ||||
6325 | if (VD && PropagatedImport) | ||||
6326 | continue; | ||||
6327 | |||||
6328 | if (!cast<NamedDecl>(Member)->isExternallyVisible()) | ||||
6329 | continue; | ||||
6330 | |||||
6331 | if (!getDLLAttr(Member)) { | ||||
6332 | InheritableAttr *NewAttr = nullptr; | ||||
6333 | |||||
6334 | // Do not export/import inline function when -fno-dllexport-inlines is | ||||
6335 | // passed. But add attribute for later local static var check. | ||||
6336 | if (!getLangOpts().DllExportInlines && MD && MD->isInlined() && | ||||
6337 | TSK != TSK_ExplicitInstantiationDeclaration && | ||||
6338 | TSK != TSK_ExplicitInstantiationDefinition) { | ||||
6339 | if (ClassExported) { | ||||
6340 | NewAttr = ::new (getASTContext()) | ||||
6341 | DLLExportStaticLocalAttr(getASTContext(), *ClassAttr); | ||||
6342 | } else { | ||||
6343 | NewAttr = ::new (getASTContext()) | ||||
6344 | DLLImportStaticLocalAttr(getASTContext(), *ClassAttr); | ||||
6345 | } | ||||
6346 | } else { | ||||
6347 | NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||
6348 | } | ||||
6349 | |||||
6350 | NewAttr->setInherited(true); | ||||
6351 | Member->addAttr(NewAttr); | ||||
6352 | |||||
6353 | if (MD) { | ||||
6354 | // Propagate DLLAttr to friend re-declarations of MD that have already | ||||
6355 | // been constructed. | ||||
6356 | for (FunctionDecl *FD = MD->getMostRecentDecl(); FD; | ||||
6357 | FD = FD->getPreviousDecl()) { | ||||
6358 | if (FD->getFriendObjectKind() == Decl::FOK_None) | ||||
6359 | continue; | ||||
6360 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 6361, __extension__ __PRETTY_FUNCTION__)) | ||||
6361 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 6361, __extension__ __PRETTY_FUNCTION__)); | ||||
6362 | NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||
6363 | NewAttr->setInherited(true); | ||||
6364 | FD->addAttr(NewAttr); | ||||
6365 | } | ||||
6366 | } | ||||
6367 | } | ||||
6368 | } | ||||
6369 | |||||
6370 | if (ClassExported) | ||||
6371 | DelayedDllExportClasses.push_back(Class); | ||||
6372 | } | ||||
6373 | |||||
6374 | /// Perform propagation of DLL attributes from a derived class to a | ||||
6375 | /// templated base class for MS compatibility. | ||||
6376 | void Sema::propagateDLLAttrToBaseClassTemplate( | ||||
6377 | CXXRecordDecl *Class, Attr *ClassAttr, | ||||
6378 | ClassTemplateSpecializationDecl *BaseTemplateSpec, SourceLocation BaseLoc) { | ||||
6379 | if (getDLLAttr( | ||||
6380 | BaseTemplateSpec->getSpecializedTemplate()->getTemplatedDecl())) { | ||||
6381 | // If the base class template has a DLL attribute, don't try to change it. | ||||
6382 | return; | ||||
6383 | } | ||||
6384 | |||||
6385 | auto TSK = BaseTemplateSpec->getSpecializationKind(); | ||||
6386 | if (!getDLLAttr(BaseTemplateSpec) && | ||||
6387 | (TSK == TSK_Undeclared || TSK == TSK_ExplicitInstantiationDeclaration || | ||||
6388 | TSK == TSK_ImplicitInstantiation)) { | ||||
6389 | // The template hasn't been instantiated yet (or it has, but only as an | ||||
6390 | // explicit instantiation declaration or implicit instantiation, which means | ||||
6391 | // we haven't codegenned any members yet), so propagate the attribute. | ||||
6392 | auto *NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||
6393 | NewAttr->setInherited(true); | ||||
6394 | BaseTemplateSpec->addAttr(NewAttr); | ||||
6395 | |||||
6396 | // If this was an import, mark that we propagated it from a derived class to | ||||
6397 | // a base class template specialization. | ||||
6398 | if (auto *ImportAttr = dyn_cast<DLLImportAttr>(NewAttr)) | ||||
6399 | ImportAttr->setPropagatedToBaseTemplate(); | ||||
6400 | |||||
6401 | // If the template is already instantiated, checkDLLAttributeRedeclaration() | ||||
6402 | // needs to be run again to work see the new attribute. Otherwise this will | ||||
6403 | // get run whenever the template is instantiated. | ||||
6404 | if (TSK != TSK_Undeclared) | ||||
6405 | checkClassLevelDLLAttribute(BaseTemplateSpec); | ||||
6406 | |||||
6407 | return; | ||||
6408 | } | ||||
6409 | |||||
6410 | if (getDLLAttr(BaseTemplateSpec)) { | ||||
6411 | // The template has already been specialized or instantiated with an | ||||
6412 | // attribute, explicitly or through propagation. We should not try to change | ||||
6413 | // it. | ||||
6414 | return; | ||||
6415 | } | ||||
6416 | |||||
6417 | // The template was previously instantiated or explicitly specialized without | ||||
6418 | // a dll attribute, It's too late for us to add an attribute, so warn that | ||||
6419 | // this is unsupported. | ||||
6420 | Diag(BaseLoc, diag::warn_attribute_dll_instantiated_base_class) | ||||
6421 | << BaseTemplateSpec->isExplicitSpecialization(); | ||||
6422 | Diag(ClassAttr->getLocation(), diag::note_attribute); | ||||
6423 | if (BaseTemplateSpec->isExplicitSpecialization()) { | ||||
6424 | Diag(BaseTemplateSpec->getLocation(), | ||||
6425 | diag::note_template_class_explicit_specialization_was_here) | ||||
6426 | << BaseTemplateSpec; | ||||
6427 | } else { | ||||
6428 | Diag(BaseTemplateSpec->getPointOfInstantiation(), | ||||
6429 | diag::note_template_class_instantiation_was_here) | ||||
6430 | << BaseTemplateSpec; | ||||
6431 | } | ||||
6432 | } | ||||
6433 | |||||
6434 | /// Determine the kind of defaulting that would be done for a given function. | ||||
6435 | /// | ||||
6436 | /// If the function is both a default constructor and a copy / move constructor | ||||
6437 | /// (due to having a default argument for the first parameter), this picks | ||||
6438 | /// CXXDefaultConstructor. | ||||
6439 | /// | ||||
6440 | /// FIXME: Check that case is properly handled by all callers. | ||||
6441 | Sema::DefaultedFunctionKind | ||||
6442 | Sema::getDefaultedFunctionKind(const FunctionDecl *FD) { | ||||
6443 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||
6444 | if (const CXXConstructorDecl *Ctor = dyn_cast<CXXConstructorDecl>(FD)) { | ||||
6445 | if (Ctor->isDefaultConstructor()) | ||||
6446 | return Sema::CXXDefaultConstructor; | ||||
6447 | |||||
6448 | if (Ctor->isCopyConstructor()) | ||||
6449 | return Sema::CXXCopyConstructor; | ||||
6450 | |||||
6451 | if (Ctor->isMoveConstructor()) | ||||
6452 | return Sema::CXXMoveConstructor; | ||||
6453 | } | ||||
6454 | |||||
6455 | if (MD->isCopyAssignmentOperator()) | ||||
6456 | return Sema::CXXCopyAssignment; | ||||
6457 | |||||
6458 | if (MD->isMoveAssignmentOperator()) | ||||
6459 | return Sema::CXXMoveAssignment; | ||||
6460 | |||||
6461 | if (isa<CXXDestructorDecl>(FD)) | ||||
6462 | return Sema::CXXDestructor; | ||||
6463 | } | ||||
6464 | |||||
6465 | switch (FD->getDeclName().getCXXOverloadedOperator()) { | ||||
6466 | case OO_EqualEqual: | ||||
6467 | return DefaultedComparisonKind::Equal; | ||||
6468 | |||||
6469 | case OO_ExclaimEqual: | ||||
6470 | return DefaultedComparisonKind::NotEqual; | ||||
6471 | |||||
6472 | case OO_Spaceship: | ||||
6473 | // No point allowing this if <=> doesn't exist in the current language mode. | ||||
6474 | if (!getLangOpts().CPlusPlus20) | ||||
6475 | break; | ||||
6476 | return DefaultedComparisonKind::ThreeWay; | ||||
6477 | |||||
6478 | case OO_Less: | ||||
6479 | case OO_LessEqual: | ||||
6480 | case OO_Greater: | ||||
6481 | case OO_GreaterEqual: | ||||
6482 | // No point allowing this if <=> doesn't exist in the current language mode. | ||||
6483 | if (!getLangOpts().CPlusPlus20) | ||||
6484 | break; | ||||
6485 | return DefaultedComparisonKind::Relational; | ||||
6486 | |||||
6487 | default: | ||||
6488 | break; | ||||
6489 | } | ||||
6490 | |||||
6491 | // Not defaultable. | ||||
6492 | return DefaultedFunctionKind(); | ||||
6493 | } | ||||
6494 | |||||
6495 | static void DefineDefaultedFunction(Sema &S, FunctionDecl *FD, | ||||
6496 | SourceLocation DefaultLoc) { | ||||
6497 | Sema::DefaultedFunctionKind DFK = S.getDefaultedFunctionKind(FD); | ||||
6498 | if (DFK.isComparison()) | ||||
6499 | return S.DefineDefaultedComparison(DefaultLoc, FD, DFK.asComparison()); | ||||
6500 | |||||
6501 | switch (DFK.asSpecialMember()) { | ||||
6502 | case Sema::CXXDefaultConstructor: | ||||
6503 | S.DefineImplicitDefaultConstructor(DefaultLoc, | ||||
6504 | cast<CXXConstructorDecl>(FD)); | ||||
6505 | break; | ||||
6506 | case Sema::CXXCopyConstructor: | ||||
6507 | S.DefineImplicitCopyConstructor(DefaultLoc, cast<CXXConstructorDecl>(FD)); | ||||
6508 | break; | ||||
6509 | case Sema::CXXCopyAssignment: | ||||
6510 | S.DefineImplicitCopyAssignment(DefaultLoc, cast<CXXMethodDecl>(FD)); | ||||
6511 | break; | ||||
6512 | case Sema::CXXDestructor: | ||||
6513 | S.DefineImplicitDestructor(DefaultLoc, cast<CXXDestructorDecl>(FD)); | ||||
6514 | break; | ||||
6515 | case Sema::CXXMoveConstructor: | ||||
6516 | S.DefineImplicitMoveConstructor(DefaultLoc, cast<CXXConstructorDecl>(FD)); | ||||
6517 | break; | ||||
6518 | case Sema::CXXMoveAssignment: | ||||
6519 | S.DefineImplicitMoveAssignment(DefaultLoc, cast<CXXMethodDecl>(FD)); | ||||
6520 | break; | ||||
6521 | case Sema::CXXInvalid: | ||||
6522 | llvm_unreachable("Invalid special member.")::llvm::llvm_unreachable_internal("Invalid special member.", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 6522); | ||||
6523 | } | ||||
6524 | } | ||||
6525 | |||||
6526 | /// Determine whether a type is permitted to be passed or returned in | ||||
6527 | /// registers, per C++ [class.temporary]p3. | ||||
6528 | static bool canPassInRegisters(Sema &S, CXXRecordDecl *D, | ||||
6529 | TargetInfo::CallingConvKind CCK) { | ||||
6530 | if (D->isDependentType() || D->isInvalidDecl()) | ||||
6531 | return false; | ||||
6532 | |||||
6533 | // Clang <= 4 used the pre-C++11 rule, which ignores move operations. | ||||
6534 | // The PS4 platform ABI follows the behavior of Clang 3.2. | ||||
6535 | if (CCK == TargetInfo::CCK_ClangABI4OrPS4) | ||||
6536 | return !D->hasNonTrivialDestructorForCall() && | ||||
6537 | !D->hasNonTrivialCopyConstructorForCall(); | ||||
6538 | |||||
6539 | if (CCK == TargetInfo::CCK_MicrosoftWin64) { | ||||
6540 | bool CopyCtorIsTrivial = false, CopyCtorIsTrivialForCall = false; | ||||
6541 | bool DtorIsTrivialForCall = false; | ||||
6542 | |||||
6543 | // If a class has at least one non-deleted, trivial copy constructor, it | ||||
6544 | // is passed according to the C ABI. Otherwise, it is passed indirectly. | ||||
6545 | // | ||||
6546 | // Note: This permits classes with non-trivial copy or move ctors to be | ||||
6547 | // passed in registers, so long as they *also* have a trivial copy ctor, | ||||
6548 | // which is non-conforming. | ||||
6549 | if (D->needsImplicitCopyConstructor()) { | ||||
6550 | if (!D->defaultedCopyConstructorIsDeleted()) { | ||||
6551 | if (D->hasTrivialCopyConstructor()) | ||||
6552 | CopyCtorIsTrivial = true; | ||||
6553 | if (D->hasTrivialCopyConstructorForCall()) | ||||
6554 | CopyCtorIsTrivialForCall = true; | ||||
6555 | } | ||||
6556 | } else { | ||||
6557 | for (const CXXConstructorDecl *CD : D->ctors()) { | ||||
6558 | if (CD->isCopyConstructor() && !CD->isDeleted()) { | ||||
6559 | if (CD->isTrivial()) | ||||
6560 | CopyCtorIsTrivial = true; | ||||
6561 | if (CD->isTrivialForCall()) | ||||
6562 | CopyCtorIsTrivialForCall = true; | ||||
6563 | } | ||||
6564 | } | ||||
6565 | } | ||||
6566 | |||||
6567 | if (D->needsImplicitDestructor()) { | ||||
6568 | if (!D->defaultedDestructorIsDeleted() && | ||||
6569 | D->hasTrivialDestructorForCall()) | ||||
6570 | DtorIsTrivialForCall = true; | ||||
6571 | } else if (const auto *DD = D->getDestructor()) { | ||||
6572 | if (!DD->isDeleted() && DD->isTrivialForCall()) | ||||
6573 | DtorIsTrivialForCall = true; | ||||
6574 | } | ||||
6575 | |||||
6576 | // If the copy ctor and dtor are both trivial-for-calls, pass direct. | ||||
6577 | if (CopyCtorIsTrivialForCall && DtorIsTrivialForCall) | ||||
6578 | return true; | ||||
6579 | |||||
6580 | // If a class has a destructor, we'd really like to pass it indirectly | ||||
6581 | // because it allows us to elide copies. Unfortunately, MSVC makes that | ||||
6582 | // impossible for small types, which it will pass in a single register or | ||||
6583 | // stack slot. Most objects with dtors are large-ish, so handle that early. | ||||
6584 | // We can't call out all large objects as being indirect because there are | ||||
6585 | // multiple x64 calling conventions and the C++ ABI code shouldn't dictate | ||||
6586 | // how we pass large POD types. | ||||
6587 | |||||
6588 | // Note: This permits small classes with nontrivial destructors to be | ||||
6589 | // passed in registers, which is non-conforming. | ||||
6590 | bool isAArch64 = S.Context.getTargetInfo().getTriple().isAArch64(); | ||||
6591 | uint64_t TypeSize = isAArch64 ? 128 : 64; | ||||
6592 | |||||
6593 | if (CopyCtorIsTrivial && | ||||
6594 | S.getASTContext().getTypeSize(D->getTypeForDecl()) <= TypeSize) | ||||
6595 | return true; | ||||
6596 | return false; | ||||
6597 | } | ||||
6598 | |||||
6599 | // Per C++ [class.temporary]p3, the relevant condition is: | ||||
6600 | // each copy constructor, move constructor, and destructor of X is | ||||
6601 | // either trivial or deleted, and X has at least one non-deleted copy | ||||
6602 | // or move constructor | ||||
6603 | bool HasNonDeletedCopyOrMove = false; | ||||
6604 | |||||
6605 | if (D->needsImplicitCopyConstructor() && | ||||
6606 | !D->defaultedCopyConstructorIsDeleted()) { | ||||
6607 | if (!D->hasTrivialCopyConstructorForCall()) | ||||
6608 | return false; | ||||
6609 | HasNonDeletedCopyOrMove = true; | ||||
6610 | } | ||||
6611 | |||||
6612 | if (S.getLangOpts().CPlusPlus11 && D->needsImplicitMoveConstructor() && | ||||
6613 | !D->defaultedMoveConstructorIsDeleted()) { | ||||
6614 | if (!D->hasTrivialMoveConstructorForCall()) | ||||
6615 | return false; | ||||
6616 | HasNonDeletedCopyOrMove = true; | ||||
6617 | } | ||||
6618 | |||||
6619 | if (D->needsImplicitDestructor() && !D->defaultedDestructorIsDeleted() && | ||||
6620 | !D->hasTrivialDestructorForCall()) | ||||
6621 | return false; | ||||
6622 | |||||
6623 | for (const CXXMethodDecl *MD : D->methods()) { | ||||
6624 | if (MD->isDeleted()) | ||||
6625 | continue; | ||||
6626 | |||||
6627 | auto *CD = dyn_cast<CXXConstructorDecl>(MD); | ||||
6628 | if (CD && CD->isCopyOrMoveConstructor()) | ||||
6629 | HasNonDeletedCopyOrMove = true; | ||||
6630 | else if (!isa<CXXDestructorDecl>(MD)) | ||||
6631 | continue; | ||||
6632 | |||||
6633 | if (!MD->isTrivialForCall()) | ||||
6634 | return false; | ||||
6635 | } | ||||
6636 | |||||
6637 | return HasNonDeletedCopyOrMove; | ||||
6638 | } | ||||
6639 | |||||
6640 | /// Report an error regarding overriding, along with any relevant | ||||
6641 | /// overridden methods. | ||||
6642 | /// | ||||
6643 | /// \param DiagID the primary error to report. | ||||
6644 | /// \param MD the overriding method. | ||||
6645 | static bool | ||||
6646 | ReportOverrides(Sema &S, unsigned DiagID, const CXXMethodDecl *MD, | ||||
6647 | llvm::function_ref<bool(const CXXMethodDecl *)> Report) { | ||||
6648 | bool IssuedDiagnostic = false; | ||||
6649 | for (const CXXMethodDecl *O : MD->overridden_methods()) { | ||||
6650 | if (Report(O)) { | ||||
6651 | if (!IssuedDiagnostic) { | ||||
6652 | S.Diag(MD->getLocation(), DiagID) << MD->getDeclName(); | ||||
6653 | IssuedDiagnostic = true; | ||||
6654 | } | ||||
6655 | S.Diag(O->getLocation(), diag::note_overridden_virtual_function); | ||||
6656 | } | ||||
6657 | } | ||||
6658 | return IssuedDiagnostic; | ||||
6659 | } | ||||
6660 | |||||
6661 | /// Perform semantic checks on a class definition that has been | ||||
6662 | /// completing, introducing implicitly-declared members, checking for | ||||
6663 | /// abstract types, etc. | ||||
6664 | /// | ||||
6665 | /// \param S The scope in which the class was parsed. Null if we didn't just | ||||
6666 | /// parse a class definition. | ||||
6667 | /// \param Record The completed class. | ||||
6668 | void Sema::CheckCompletedCXXClass(Scope *S, CXXRecordDecl *Record) { | ||||
6669 | if (!Record) | ||||
6670 | return; | ||||
6671 | |||||
6672 | if (Record->isAbstract() && !Record->isInvalidDecl()) { | ||||
6673 | AbstractUsageInfo Info(*this, Record); | ||||
6674 | CheckAbstractClassUsage(Info, Record); | ||||
6675 | } | ||||
6676 | |||||
6677 | // If this is not an aggregate type and has no user-declared constructor, | ||||
6678 | // complain about any non-static data members of reference or const scalar | ||||
6679 | // type, since they will never get initializers. | ||||
6680 | if (!Record->isInvalidDecl() && !Record->isDependentType() && | ||||
6681 | !Record->isAggregate() && !Record->hasUserDeclaredConstructor() && | ||||
6682 | !Record->isLambda()) { | ||||
6683 | bool Complained = false; | ||||
6684 | for (const auto *F : Record->fields()) { | ||||
6685 | if (F->hasInClassInitializer() || F->isUnnamedBitfield()) | ||||
6686 | continue; | ||||
6687 | |||||
6688 | if (F->getType()->isReferenceType() || | ||||
6689 | (F->getType().isConstQualified() && F->getType()->isScalarType())) { | ||||
6690 | if (!Complained) { | ||||
6691 | Diag(Record->getLocation(), diag::warn_no_constructor_for_refconst) | ||||
6692 | << Record->getTagKind() << Record; | ||||
6693 | Complained = true; | ||||
6694 | } | ||||
6695 | |||||
6696 | Diag(F->getLocation(), diag::note_refconst_member_not_initialized) | ||||
6697 | << F->getType()->isReferenceType() | ||||
6698 | << F->getDeclName(); | ||||
6699 | } | ||||
6700 | } | ||||
6701 | } | ||||
6702 | |||||
6703 | if (Record->getIdentifier()) { | ||||
6704 | // C++ [class.mem]p13: | ||||
6705 | // If T is the name of a class, then each of the following shall have a | ||||
6706 | // name different from T: | ||||
6707 | // - every member of every anonymous union that is a member of class T. | ||||
6708 | // | ||||
6709 | // C++ [class.mem]p14: | ||||
6710 | // In addition, if class T has a user-declared constructor (12.1), every | ||||
6711 | // non-static data member of class T shall have a name different from T. | ||||
6712 | DeclContext::lookup_result R = Record->lookup(Record->getDeclName()); | ||||
6713 | for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; | ||||
6714 | ++I) { | ||||
6715 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||
6716 | if (((isa<FieldDecl>(D) || isa<UnresolvedUsingValueDecl>(D)) && | ||||
6717 | Record->hasUserDeclaredConstructor()) || | ||||
6718 | isa<IndirectFieldDecl>(D)) { | ||||
6719 | Diag((*I)->getLocation(), diag::err_member_name_of_class) | ||||
6720 | << D->getDeclName(); | ||||
6721 | break; | ||||
6722 | } | ||||
6723 | } | ||||
6724 | } | ||||
6725 | |||||
6726 | // Warn if the class has virtual methods but non-virtual public destructor. | ||||
6727 | if (Record->isPolymorphic() && !Record->isDependentType()) { | ||||
6728 | CXXDestructorDecl *dtor = Record->getDestructor(); | ||||
6729 | if ((!dtor || (!dtor->isVirtual() && dtor->getAccess() == AS_public)) && | ||||
6730 | !Record->hasAttr<FinalAttr>()) | ||||
6731 | Diag(dtor ? dtor->getLocation() : Record->getLocation(), | ||||
6732 | diag::warn_non_virtual_dtor) << Context.getRecordType(Record); | ||||
6733 | } | ||||
6734 | |||||
6735 | if (Record->isAbstract()) { | ||||
6736 | if (FinalAttr *FA = Record->getAttr<FinalAttr>()) { | ||||
6737 | Diag(Record->getLocation(), diag::warn_abstract_final_class) | ||||
6738 | << FA->isSpelledAsSealed(); | ||||
6739 | DiagnoseAbstractType(Record); | ||||
6740 | } | ||||
6741 | } | ||||
6742 | |||||
6743 | // Warn if the class has a final destructor but is not itself marked final. | ||||
6744 | if (!Record->hasAttr<FinalAttr>()) { | ||||
6745 | if (const CXXDestructorDecl *dtor = Record->getDestructor()) { | ||||
6746 | if (const FinalAttr *FA = dtor->getAttr<FinalAttr>()) { | ||||
6747 | Diag(FA->getLocation(), diag::warn_final_dtor_non_final_class) | ||||
6748 | << FA->isSpelledAsSealed() | ||||
6749 | << FixItHint::CreateInsertion( | ||||
6750 | getLocForEndOfToken(Record->getLocation()), | ||||
6751 | (FA->isSpelledAsSealed() ? " sealed" : " final")); | ||||
6752 | Diag(Record->getLocation(), | ||||
6753 | diag::note_final_dtor_non_final_class_silence) | ||||
6754 | << Context.getRecordType(Record) << FA->isSpelledAsSealed(); | ||||
6755 | } | ||||
6756 | } | ||||
6757 | } | ||||
6758 | |||||
6759 | // See if trivial_abi has to be dropped. | ||||
6760 | if (Record->hasAttr<TrivialABIAttr>()) | ||||
6761 | checkIllFormedTrivialABIStruct(*Record); | ||||
6762 | |||||
6763 | // Set HasTrivialSpecialMemberForCall if the record has attribute | ||||
6764 | // "trivial_abi". | ||||
6765 | bool HasTrivialABI = Record->hasAttr<TrivialABIAttr>(); | ||||
6766 | |||||
6767 | if (HasTrivialABI) | ||||
6768 | Record->setHasTrivialSpecialMemberForCall(); | ||||
6769 | |||||
6770 | // Explicitly-defaulted secondary comparison functions (!=, <, <=, >, >=). | ||||
6771 | // We check these last because they can depend on the properties of the | ||||
6772 | // primary comparison functions (==, <=>). | ||||
6773 | llvm::SmallVector<FunctionDecl*, 5> DefaultedSecondaryComparisons; | ||||
6774 | |||||
6775 | // Perform checks that can't be done until we know all the properties of a | ||||
6776 | // member function (whether it's defaulted, deleted, virtual, overriding, | ||||
6777 | // ...). | ||||
6778 | auto CheckCompletedMemberFunction = [&](CXXMethodDecl *MD) { | ||||
6779 | // A static function cannot override anything. | ||||
6780 | if (MD->getStorageClass() == SC_Static) { | ||||
6781 | if (ReportOverrides(*this, diag::err_static_overrides_virtual, MD, | ||||
6782 | [](const CXXMethodDecl *) { return true; })) | ||||
6783 | return; | ||||
6784 | } | ||||
6785 | |||||
6786 | // A deleted function cannot override a non-deleted function and vice | ||||
6787 | // versa. | ||||
6788 | if (ReportOverrides(*this, | ||||
6789 | MD->isDeleted() ? diag::err_deleted_override | ||||
6790 | : diag::err_non_deleted_override, | ||||
6791 | MD, [&](const CXXMethodDecl *V) { | ||||
6792 | return MD->isDeleted() != V->isDeleted(); | ||||
6793 | })) { | ||||
6794 | if (MD->isDefaulted() && MD->isDeleted()) | ||||
6795 | // Explain why this defaulted function was deleted. | ||||
6796 | DiagnoseDeletedDefaultedFunction(MD); | ||||
6797 | return; | ||||
6798 | } | ||||
6799 | |||||
6800 | // A consteval function cannot override a non-consteval function and vice | ||||
6801 | // versa. | ||||
6802 | if (ReportOverrides(*this, | ||||
6803 | MD->isConsteval() ? diag::err_consteval_override | ||||
6804 | : diag::err_non_consteval_override, | ||||
6805 | MD, [&](const CXXMethodDecl *V) { | ||||
6806 | return MD->isConsteval() != V->isConsteval(); | ||||
6807 | })) { | ||||
6808 | if (MD->isDefaulted() && MD->isDeleted()) | ||||
6809 | // Explain why this defaulted function was deleted. | ||||
6810 | DiagnoseDeletedDefaultedFunction(MD); | ||||
6811 | return; | ||||
6812 | } | ||||
6813 | }; | ||||
6814 | |||||
6815 | auto CheckForDefaultedFunction = [&](FunctionDecl *FD) -> bool { | ||||
6816 | if (!FD || FD->isInvalidDecl() || !FD->isExplicitlyDefaulted()) | ||||
6817 | return false; | ||||
6818 | |||||
6819 | DefaultedFunctionKind DFK = getDefaultedFunctionKind(FD); | ||||
6820 | if (DFK.asComparison() == DefaultedComparisonKind::NotEqual || | ||||
6821 | DFK.asComparison() == DefaultedComparisonKind::Relational) { | ||||
6822 | DefaultedSecondaryComparisons.push_back(FD); | ||||
6823 | return true; | ||||
6824 | } | ||||
6825 | |||||
6826 | CheckExplicitlyDefaultedFunction(S, FD); | ||||
6827 | return false; | ||||
6828 | }; | ||||
6829 | |||||
6830 | auto CompleteMemberFunction = [&](CXXMethodDecl *M) { | ||||
6831 | // Check whether the explicitly-defaulted members are valid. | ||||
6832 | bool Incomplete = CheckForDefaultedFunction(M); | ||||
6833 | |||||
6834 | // Skip the rest of the checks for a member of a dependent class. | ||||
6835 | if (Record->isDependentType()) | ||||
6836 | return; | ||||
6837 | |||||
6838 | // For an explicitly defaulted or deleted special member, we defer | ||||
6839 | // determining triviality until the class is complete. That time is now! | ||||
6840 | CXXSpecialMember CSM = getSpecialMember(M); | ||||
6841 | if (!M->isImplicit() && !M->isUserProvided()) { | ||||
6842 | if (CSM != CXXInvalid) { | ||||
6843 | M->setTrivial(SpecialMemberIsTrivial(M, CSM)); | ||||
6844 | // Inform the class that we've finished declaring this member. | ||||
6845 | Record->finishedDefaultedOrDeletedMember(M); | ||||
6846 | M->setTrivialForCall( | ||||
6847 | HasTrivialABI || | ||||
6848 | SpecialMemberIsTrivial(M, CSM, TAH_ConsiderTrivialABI)); | ||||
6849 | Record->setTrivialForCallFlags(M); | ||||
6850 | } | ||||
6851 | } | ||||
6852 | |||||
6853 | // Set triviality for the purpose of calls if this is a user-provided | ||||
6854 | // copy/move constructor or destructor. | ||||
6855 | if ((CSM == CXXCopyConstructor || CSM == CXXMoveConstructor || | ||||
6856 | CSM == CXXDestructor) && M->isUserProvided()) { | ||||
6857 | M->setTrivialForCall(HasTrivialABI); | ||||
6858 | Record->setTrivialForCallFlags(M); | ||||
6859 | } | ||||
6860 | |||||
6861 | if (!M->isInvalidDecl() && M->isExplicitlyDefaulted() && | ||||
6862 | M->hasAttr<DLLExportAttr>()) { | ||||
6863 | if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||
6864 | M->isTrivial() && | ||||
6865 | (CSM == CXXDefaultConstructor || CSM == CXXCopyConstructor || | ||||
6866 | CSM == CXXDestructor)) | ||||
6867 | M->dropAttr<DLLExportAttr>(); | ||||
6868 | |||||
6869 | if (M->hasAttr<DLLExportAttr>()) { | ||||
6870 | // Define after any fields with in-class initializers have been parsed. | ||||
6871 | DelayedDllExportMemberFunctions.push_back(M); | ||||
6872 | } | ||||
6873 | } | ||||
6874 | |||||
6875 | // Define defaulted constexpr virtual functions that override a base class | ||||
6876 | // function right away. | ||||
6877 | // FIXME: We can defer doing this until the vtable is marked as used. | ||||
6878 | if (M->isDefaulted() && M->isConstexpr() && M->size_overridden_methods()) | ||||
6879 | DefineDefaultedFunction(*this, M, M->getLocation()); | ||||
6880 | |||||
6881 | if (!Incomplete) | ||||
6882 | CheckCompletedMemberFunction(M); | ||||
6883 | }; | ||||
6884 | |||||
6885 | // Check the destructor before any other member function. We need to | ||||
6886 | // determine whether it's trivial in order to determine whether the claas | ||||
6887 | // type is a literal type, which is a prerequisite for determining whether | ||||
6888 | // other special member functions are valid and whether they're implicitly | ||||
6889 | // 'constexpr'. | ||||
6890 | if (CXXDestructorDecl *Dtor = Record->getDestructor()) | ||||
6891 | CompleteMemberFunction(Dtor); | ||||
6892 | |||||
6893 | bool HasMethodWithOverrideControl = false, | ||||
6894 | HasOverridingMethodWithoutOverrideControl = false; | ||||
6895 | for (auto *D : Record->decls()) { | ||||
6896 | if (auto *M = dyn_cast<CXXMethodDecl>(D)) { | ||||
6897 | // FIXME: We could do this check for dependent types with non-dependent | ||||
6898 | // bases. | ||||
6899 | if (!Record->isDependentType()) { | ||||
6900 | // See if a method overloads virtual methods in a base | ||||
6901 | // class without overriding any. | ||||
6902 | if (!M->isStatic()) | ||||
6903 | DiagnoseHiddenVirtualMethods(M); | ||||
6904 | if (M->hasAttr<OverrideAttr>()) | ||||
6905 | HasMethodWithOverrideControl = true; | ||||
6906 | else if (M->size_overridden_methods() > 0) | ||||
6907 | HasOverridingMethodWithoutOverrideControl = true; | ||||
6908 | } | ||||
6909 | |||||
6910 | if (!isa<CXXDestructorDecl>(M)) | ||||
6911 | CompleteMemberFunction(M); | ||||
6912 | } else if (auto *F = dyn_cast<FriendDecl>(D)) { | ||||
6913 | CheckForDefaultedFunction( | ||||
6914 | dyn_cast_or_null<FunctionDecl>(F->getFriendDecl())); | ||||
6915 | } | ||||
6916 | } | ||||
6917 | |||||
6918 | if (HasOverridingMethodWithoutOverrideControl) { | ||||
6919 | bool HasInconsistentOverrideControl = HasMethodWithOverrideControl; | ||||
6920 | for (auto *M : Record->methods()) | ||||
6921 | DiagnoseAbsenceOfOverrideControl(M, HasInconsistentOverrideControl); | ||||
6922 | } | ||||
6923 | |||||
6924 | // Check the defaulted secondary comparisons after any other member functions. | ||||
6925 | for (FunctionDecl *FD : DefaultedSecondaryComparisons) { | ||||
6926 | CheckExplicitlyDefaultedFunction(S, FD); | ||||
6927 | |||||
6928 | // If this is a member function, we deferred checking it until now. | ||||
6929 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) | ||||
6930 | CheckCompletedMemberFunction(MD); | ||||
6931 | } | ||||
6932 | |||||
6933 | // ms_struct is a request to use the same ABI rules as MSVC. Check | ||||
6934 | // whether this class uses any C++ features that are implemented | ||||
6935 | // completely differently in MSVC, and if so, emit a diagnostic. | ||||
6936 | // That diagnostic defaults to an error, but we allow projects to | ||||
6937 | // map it down to a warning (or ignore it). It's a fairly common | ||||
6938 | // practice among users of the ms_struct pragma to mass-annotate | ||||
6939 | // headers, sweeping up a bunch of types that the project doesn't | ||||
6940 | // really rely on MSVC-compatible layout for. We must therefore | ||||
6941 | // support "ms_struct except for C++ stuff" as a secondary ABI. | ||||
6942 | // Don't emit this diagnostic if the feature was enabled as a | ||||
6943 | // language option (as opposed to via a pragma or attribute), as | ||||
6944 | // the option -mms-bitfields otherwise essentially makes it impossible | ||||
6945 | // to build C++ code, unless this diagnostic is turned off. | ||||
6946 | if (Record->isMsStruct(Context) && !Context.getLangOpts().MSBitfields && | ||||
6947 | (Record->isPolymorphic() || Record->getNumBases())) { | ||||
6948 | Diag(Record->getLocation(), diag::warn_cxx_ms_struct); | ||||
6949 | } | ||||
6950 | |||||
6951 | checkClassLevelDLLAttribute(Record); | ||||
6952 | checkClassLevelCodeSegAttribute(Record); | ||||
6953 | |||||
6954 | bool ClangABICompat4 = | ||||
6955 | Context.getLangOpts().getClangABICompat() <= LangOptions::ClangABI::Ver4; | ||||
6956 | TargetInfo::CallingConvKind CCK = | ||||
6957 | Context.getTargetInfo().getCallingConvKind(ClangABICompat4); | ||||
6958 | bool CanPass = canPassInRegisters(*this, Record, CCK); | ||||
6959 | |||||
6960 | // Do not change ArgPassingRestrictions if it has already been set to | ||||
6961 | // APK_CanNeverPassInRegs. | ||||
6962 | if (Record->getArgPassingRestrictions() != RecordDecl::APK_CanNeverPassInRegs) | ||||
6963 | Record->setArgPassingRestrictions(CanPass | ||||
6964 | ? RecordDecl::APK_CanPassInRegs | ||||
6965 | : RecordDecl::APK_CannotPassInRegs); | ||||
6966 | |||||
6967 | // If canPassInRegisters returns true despite the record having a non-trivial | ||||
6968 | // destructor, the record is destructed in the callee. This happens only when | ||||
6969 | // the record or one of its subobjects has a field annotated with trivial_abi | ||||
6970 | // or a field qualified with ObjC __strong/__weak. | ||||
6971 | if (Context.getTargetInfo().getCXXABI().areArgsDestroyedLeftToRightInCallee()) | ||||
6972 | Record->setParamDestroyedInCallee(true); | ||||
6973 | else if (Record->hasNonTrivialDestructor()) | ||||
6974 | Record->setParamDestroyedInCallee(CanPass); | ||||
6975 | |||||
6976 | if (getLangOpts().ForceEmitVTables) { | ||||
6977 | // If we want to emit all the vtables, we need to mark it as used. This | ||||
6978 | // is especially required for cases like vtable assumption loads. | ||||
6979 | MarkVTableUsed(Record->getInnerLocStart(), Record); | ||||
6980 | } | ||||
6981 | |||||
6982 | if (getLangOpts().CUDA) { | ||||
6983 | if (Record->hasAttr<CUDADeviceBuiltinSurfaceTypeAttr>()) | ||||
6984 | checkCUDADeviceBuiltinSurfaceClassTemplate(*this, Record); | ||||
6985 | else if (Record->hasAttr<CUDADeviceBuiltinTextureTypeAttr>()) | ||||
6986 | checkCUDADeviceBuiltinTextureClassTemplate(*this, Record); | ||||
6987 | } | ||||
6988 | } | ||||
6989 | |||||
6990 | /// Look up the special member function that would be called by a special | ||||
6991 | /// member function for a subobject of class type. | ||||
6992 | /// | ||||
6993 | /// \param Class The class type of the subobject. | ||||
6994 | /// \param CSM The kind of special member function. | ||||
6995 | /// \param FieldQuals If the subobject is a field, its cv-qualifiers. | ||||
6996 | /// \param ConstRHS True if this is a copy operation with a const object | ||||
6997 | /// on its RHS, that is, if the argument to the outer special member | ||||
6998 | /// function is 'const' and this is not a field marked 'mutable'. | ||||
6999 | static Sema::SpecialMemberOverloadResult lookupCallFromSpecialMember( | ||||
7000 | Sema &S, CXXRecordDecl *Class, Sema::CXXSpecialMember CSM, | ||||
7001 | unsigned FieldQuals, bool ConstRHS) { | ||||
7002 | unsigned LHSQuals = 0; | ||||
7003 | if (CSM == Sema::CXXCopyAssignment || CSM == Sema::CXXMoveAssignment) | ||||
7004 | LHSQuals = FieldQuals; | ||||
7005 | |||||
7006 | unsigned RHSQuals = FieldQuals; | ||||
7007 | if (CSM == Sema::CXXDefaultConstructor || CSM == Sema::CXXDestructor) | ||||
7008 | RHSQuals = 0; | ||||
7009 | else if (ConstRHS) | ||||
7010 | RHSQuals |= Qualifiers::Const; | ||||
7011 | |||||
7012 | return S.LookupSpecialMember(Class, CSM, | ||||
7013 | RHSQuals & Qualifiers::Const, | ||||
7014 | RHSQuals & Qualifiers::Volatile, | ||||
7015 | false, | ||||
7016 | LHSQuals & Qualifiers::Const, | ||||
7017 | LHSQuals & Qualifiers::Volatile); | ||||
7018 | } | ||||
7019 | |||||
7020 | class Sema::InheritedConstructorInfo { | ||||
7021 | Sema &S; | ||||
7022 | SourceLocation UseLoc; | ||||
7023 | |||||
7024 | /// A mapping from the base classes through which the constructor was | ||||
7025 | /// inherited to the using shadow declaration in that base class (or a null | ||||
7026 | /// pointer if the constructor was declared in that base class). | ||||
7027 | llvm::DenseMap<CXXRecordDecl *, ConstructorUsingShadowDecl *> | ||||
7028 | InheritedFromBases; | ||||
7029 | |||||
7030 | public: | ||||
7031 | InheritedConstructorInfo(Sema &S, SourceLocation UseLoc, | ||||
7032 | ConstructorUsingShadowDecl *Shadow) | ||||
7033 | : S(S), UseLoc(UseLoc) { | ||||
7034 | bool DiagnosedMultipleConstructedBases = false; | ||||
7035 | CXXRecordDecl *ConstructedBase = nullptr; | ||||
7036 | BaseUsingDecl *ConstructedBaseIntroducer = nullptr; | ||||
7037 | |||||
7038 | // Find the set of such base class subobjects and check that there's a | ||||
7039 | // unique constructed subobject. | ||||
7040 | for (auto *D : Shadow->redecls()) { | ||||
7041 | auto *DShadow = cast<ConstructorUsingShadowDecl>(D); | ||||
7042 | auto *DNominatedBase = DShadow->getNominatedBaseClass(); | ||||
7043 | auto *DConstructedBase = DShadow->getConstructedBaseClass(); | ||||
7044 | |||||
7045 | InheritedFromBases.insert( | ||||
7046 | std::make_pair(DNominatedBase->getCanonicalDecl(), | ||||
7047 | DShadow->getNominatedBaseClassShadowDecl())); | ||||
7048 | if (DShadow->constructsVirtualBase()) | ||||
7049 | InheritedFromBases.insert( | ||||
7050 | std::make_pair(DConstructedBase->getCanonicalDecl(), | ||||
7051 | DShadow->getConstructedBaseClassShadowDecl())); | ||||
7052 | else | ||||
7053 | assert(DNominatedBase == DConstructedBase)(static_cast <bool> (DNominatedBase == DConstructedBase ) ? void (0) : __assert_fail ("DNominatedBase == DConstructedBase" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7053, __extension__ __PRETTY_FUNCTION__)); | ||||
7054 | |||||
7055 | // [class.inhctor.init]p2: | ||||
7056 | // If the constructor was inherited from multiple base class subobjects | ||||
7057 | // of type B, the program is ill-formed. | ||||
7058 | if (!ConstructedBase) { | ||||
7059 | ConstructedBase = DConstructedBase; | ||||
7060 | ConstructedBaseIntroducer = D->getIntroducer(); | ||||
7061 | } else if (ConstructedBase != DConstructedBase && | ||||
7062 | !Shadow->isInvalidDecl()) { | ||||
7063 | if (!DiagnosedMultipleConstructedBases) { | ||||
7064 | S.Diag(UseLoc, diag::err_ambiguous_inherited_constructor) | ||||
7065 | << Shadow->getTargetDecl(); | ||||
7066 | S.Diag(ConstructedBaseIntroducer->getLocation(), | ||||
7067 | diag::note_ambiguous_inherited_constructor_using) | ||||
7068 | << ConstructedBase; | ||||
7069 | DiagnosedMultipleConstructedBases = true; | ||||
7070 | } | ||||
7071 | S.Diag(D->getIntroducer()->getLocation(), | ||||
7072 | diag::note_ambiguous_inherited_constructor_using) | ||||
7073 | << DConstructedBase; | ||||
7074 | } | ||||
7075 | } | ||||
7076 | |||||
7077 | if (DiagnosedMultipleConstructedBases) | ||||
7078 | Shadow->setInvalidDecl(); | ||||
7079 | } | ||||
7080 | |||||
7081 | /// Find the constructor to use for inherited construction of a base class, | ||||
7082 | /// and whether that base class constructor inherits the constructor from a | ||||
7083 | /// virtual base class (in which case it won't actually invoke it). | ||||
7084 | std::pair<CXXConstructorDecl *, bool> | ||||
7085 | findConstructorForBase(CXXRecordDecl *Base, CXXConstructorDecl *Ctor) const { | ||||
7086 | auto It = InheritedFromBases.find(Base->getCanonicalDecl()); | ||||
7087 | if (It == InheritedFromBases.end()) | ||||
7088 | return std::make_pair(nullptr, false); | ||||
7089 | |||||
7090 | // This is an intermediary class. | ||||
7091 | if (It->second) | ||||
7092 | return std::make_pair( | ||||
7093 | S.findInheritingConstructor(UseLoc, Ctor, It->second), | ||||
7094 | It->second->constructsVirtualBase()); | ||||
7095 | |||||
7096 | // This is the base class from which the constructor was inherited. | ||||
7097 | return std::make_pair(Ctor, false); | ||||
7098 | } | ||||
7099 | }; | ||||
7100 | |||||
7101 | /// Is the special member function which would be selected to perform the | ||||
7102 | /// specified operation on the specified class type a constexpr constructor? | ||||
7103 | static bool | ||||
7104 | specialMemberIsConstexpr(Sema &S, CXXRecordDecl *ClassDecl, | ||||
7105 | Sema::CXXSpecialMember CSM, unsigned Quals, | ||||
7106 | bool ConstRHS, | ||||
7107 | CXXConstructorDecl *InheritedCtor = nullptr, | ||||
7108 | Sema::InheritedConstructorInfo *Inherited = nullptr) { | ||||
7109 | // If we're inheriting a constructor, see if we need to call it for this base | ||||
7110 | // class. | ||||
7111 | if (InheritedCtor) { | ||||
7112 | assert(CSM == Sema::CXXDefaultConstructor)(static_cast <bool> (CSM == Sema::CXXDefaultConstructor ) ? void (0) : __assert_fail ("CSM == Sema::CXXDefaultConstructor" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7112, __extension__ __PRETTY_FUNCTION__)); | ||||
7113 | auto BaseCtor = | ||||
7114 | Inherited->findConstructorForBase(ClassDecl, InheritedCtor).first; | ||||
7115 | if (BaseCtor) | ||||
7116 | return BaseCtor->isConstexpr(); | ||||
7117 | } | ||||
7118 | |||||
7119 | if (CSM == Sema::CXXDefaultConstructor) | ||||
7120 | return ClassDecl->hasConstexprDefaultConstructor(); | ||||
7121 | if (CSM == Sema::CXXDestructor) | ||||
7122 | return ClassDecl->hasConstexprDestructor(); | ||||
7123 | |||||
7124 | Sema::SpecialMemberOverloadResult SMOR = | ||||
7125 | lookupCallFromSpecialMember(S, ClassDecl, CSM, Quals, ConstRHS); | ||||
7126 | if (!SMOR.getMethod()) | ||||
7127 | // A constructor we wouldn't select can't be "involved in initializing" | ||||
7128 | // anything. | ||||
7129 | return true; | ||||
7130 | return SMOR.getMethod()->isConstexpr(); | ||||
7131 | } | ||||
7132 | |||||
7133 | /// Determine whether the specified special member function would be constexpr | ||||
7134 | /// if it were implicitly defined. | ||||
7135 | static bool defaultedSpecialMemberIsConstexpr( | ||||
7136 | Sema &S, CXXRecordDecl *ClassDecl, Sema::CXXSpecialMember CSM, | ||||
7137 | bool ConstArg, CXXConstructorDecl *InheritedCtor = nullptr, | ||||
7138 | Sema::InheritedConstructorInfo *Inherited = nullptr) { | ||||
7139 | if (!S.getLangOpts().CPlusPlus11) | ||||
7140 | return false; | ||||
7141 | |||||
7142 | // C++11 [dcl.constexpr]p4: | ||||
7143 | // In the definition of a constexpr constructor [...] | ||||
7144 | bool Ctor = true; | ||||
7145 | switch (CSM) { | ||||
7146 | case Sema::CXXDefaultConstructor: | ||||
7147 | if (Inherited) | ||||
7148 | break; | ||||
7149 | // Since default constructor lookup is essentially trivial (and cannot | ||||
7150 | // involve, for instance, template instantiation), we compute whether a | ||||
7151 | // defaulted default constructor is constexpr directly within CXXRecordDecl. | ||||
7152 | // | ||||
7153 | // This is important for performance; we need to know whether the default | ||||
7154 | // constructor is constexpr to determine whether the type is a literal type. | ||||
7155 | return ClassDecl->defaultedDefaultConstructorIsConstexpr(); | ||||
7156 | |||||
7157 | case Sema::CXXCopyConstructor: | ||||
7158 | case Sema::CXXMoveConstructor: | ||||
7159 | // For copy or move constructors, we need to perform overload resolution. | ||||
7160 | break; | ||||
7161 | |||||
7162 | case Sema::CXXCopyAssignment: | ||||
7163 | case Sema::CXXMoveAssignment: | ||||
7164 | if (!S.getLangOpts().CPlusPlus14) | ||||
7165 | return false; | ||||
7166 | // In C++1y, we need to perform overload resolution. | ||||
7167 | Ctor = false; | ||||
7168 | break; | ||||
7169 | |||||
7170 | case Sema::CXXDestructor: | ||||
7171 | return ClassDecl->defaultedDestructorIsConstexpr(); | ||||
7172 | |||||
7173 | case Sema::CXXInvalid: | ||||
7174 | return false; | ||||
7175 | } | ||||
7176 | |||||
7177 | // -- if the class is a non-empty union, or for each non-empty anonymous | ||||
7178 | // union member of a non-union class, exactly one non-static data member | ||||
7179 | // shall be initialized; [DR1359] | ||||
7180 | // | ||||
7181 | // If we squint, this is guaranteed, since exactly one non-static data member | ||||
7182 | // will be initialized (if the constructor isn't deleted), we just don't know | ||||
7183 | // which one. | ||||
7184 | if (Ctor && ClassDecl->isUnion()) | ||||
7185 | return CSM == Sema::CXXDefaultConstructor | ||||
7186 | ? ClassDecl->hasInClassInitializer() || | ||||
7187 | !ClassDecl->hasVariantMembers() | ||||
7188 | : true; | ||||
7189 | |||||
7190 | // -- the class shall not have any virtual base classes; | ||||
7191 | if (Ctor && ClassDecl->getNumVBases()) | ||||
7192 | return false; | ||||
7193 | |||||
7194 | // C++1y [class.copy]p26: | ||||
7195 | // -- [the class] is a literal type, and | ||||
7196 | if (!Ctor && !ClassDecl->isLiteral()) | ||||
7197 | return false; | ||||
7198 | |||||
7199 | // -- every constructor involved in initializing [...] base class | ||||
7200 | // sub-objects shall be a constexpr constructor; | ||||
7201 | // -- the assignment operator selected to copy/move each direct base | ||||
7202 | // class is a constexpr function, and | ||||
7203 | for (const auto &B : ClassDecl->bases()) { | ||||
7204 | const RecordType *BaseType = B.getType()->getAs<RecordType>(); | ||||
7205 | if (!BaseType) continue; | ||||
7206 | |||||
7207 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(BaseType->getDecl()); | ||||
7208 | if (!specialMemberIsConstexpr(S, BaseClassDecl, CSM, 0, ConstArg, | ||||
7209 | InheritedCtor, Inherited)) | ||||
7210 | return false; | ||||
7211 | } | ||||
7212 | |||||
7213 | // -- every constructor involved in initializing non-static data members | ||||
7214 | // [...] shall be a constexpr constructor; | ||||
7215 | // -- every non-static data member and base class sub-object shall be | ||||
7216 | // initialized | ||||
7217 | // -- for each non-static data member of X that is of class type (or array | ||||
7218 | // thereof), the assignment operator selected to copy/move that member is | ||||
7219 | // a constexpr function | ||||
7220 | for (const auto *F : ClassDecl->fields()) { | ||||
7221 | if (F->isInvalidDecl()) | ||||
7222 | continue; | ||||
7223 | if (CSM == Sema::CXXDefaultConstructor && F->hasInClassInitializer()) | ||||
7224 | continue; | ||||
7225 | QualType BaseType = S.Context.getBaseElementType(F->getType()); | ||||
7226 | if (const RecordType *RecordTy = BaseType->getAs<RecordType>()) { | ||||
7227 | CXXRecordDecl *FieldRecDecl = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||
7228 | if (!specialMemberIsConstexpr(S, FieldRecDecl, CSM, | ||||
7229 | BaseType.getCVRQualifiers(), | ||||
7230 | ConstArg && !F->isMutable())) | ||||
7231 | return false; | ||||
7232 | } else if (CSM == Sema::CXXDefaultConstructor) { | ||||
7233 | return false; | ||||
7234 | } | ||||
7235 | } | ||||
7236 | |||||
7237 | // All OK, it's constexpr! | ||||
7238 | return true; | ||||
7239 | } | ||||
7240 | |||||
7241 | namespace { | ||||
7242 | /// RAII object to register a defaulted function as having its exception | ||||
7243 | /// specification computed. | ||||
7244 | struct ComputingExceptionSpec { | ||||
7245 | Sema &S; | ||||
7246 | |||||
7247 | ComputingExceptionSpec(Sema &S, FunctionDecl *FD, SourceLocation Loc) | ||||
7248 | : S(S) { | ||||
7249 | Sema::CodeSynthesisContext Ctx; | ||||
7250 | Ctx.Kind = Sema::CodeSynthesisContext::ExceptionSpecEvaluation; | ||||
7251 | Ctx.PointOfInstantiation = Loc; | ||||
7252 | Ctx.Entity = FD; | ||||
7253 | S.pushCodeSynthesisContext(Ctx); | ||||
7254 | } | ||||
7255 | ~ComputingExceptionSpec() { | ||||
7256 | S.popCodeSynthesisContext(); | ||||
7257 | } | ||||
7258 | }; | ||||
7259 | } | ||||
7260 | |||||
7261 | static Sema::ImplicitExceptionSpecification | ||||
7262 | ComputeDefaultedSpecialMemberExceptionSpec( | ||||
7263 | Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||
7264 | Sema::InheritedConstructorInfo *ICI); | ||||
7265 | |||||
7266 | static Sema::ImplicitExceptionSpecification | ||||
7267 | ComputeDefaultedComparisonExceptionSpec(Sema &S, SourceLocation Loc, | ||||
7268 | FunctionDecl *FD, | ||||
7269 | Sema::DefaultedComparisonKind DCK); | ||||
7270 | |||||
7271 | static Sema::ImplicitExceptionSpecification | ||||
7272 | computeImplicitExceptionSpec(Sema &S, SourceLocation Loc, FunctionDecl *FD) { | ||||
7273 | auto DFK = S.getDefaultedFunctionKind(FD); | ||||
7274 | if (DFK.isSpecialMember()) | ||||
7275 | return ComputeDefaultedSpecialMemberExceptionSpec( | ||||
7276 | S, Loc, cast<CXXMethodDecl>(FD), DFK.asSpecialMember(), nullptr); | ||||
7277 | if (DFK.isComparison()) | ||||
7278 | return ComputeDefaultedComparisonExceptionSpec(S, Loc, FD, | ||||
7279 | DFK.asComparison()); | ||||
7280 | |||||
7281 | auto *CD = cast<CXXConstructorDecl>(FD); | ||||
7282 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7284, __extension__ __PRETTY_FUNCTION__)) | ||||
7283 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7284, __extension__ __PRETTY_FUNCTION__)) | ||||
7284 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7284, __extension__ __PRETTY_FUNCTION__)); | ||||
7285 | Sema::InheritedConstructorInfo ICI( | ||||
7286 | S, Loc, CD->getInheritedConstructor().getShadowDecl()); | ||||
7287 | return ComputeDefaultedSpecialMemberExceptionSpec( | ||||
7288 | S, Loc, CD, Sema::CXXDefaultConstructor, &ICI); | ||||
7289 | } | ||||
7290 | |||||
7291 | static FunctionProtoType::ExtProtoInfo getImplicitMethodEPI(Sema &S, | ||||
7292 | CXXMethodDecl *MD) { | ||||
7293 | FunctionProtoType::ExtProtoInfo EPI; | ||||
7294 | |||||
7295 | // Build an exception specification pointing back at this member. | ||||
7296 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||
7297 | EPI.ExceptionSpec.SourceDecl = MD; | ||||
7298 | |||||
7299 | // Set the calling convention to the default for C++ instance methods. | ||||
7300 | EPI.ExtInfo = EPI.ExtInfo.withCallingConv( | ||||
7301 | S.Context.getDefaultCallingConvention(/*IsVariadic=*/false, | ||||
7302 | /*IsCXXMethod=*/true)); | ||||
7303 | return EPI; | ||||
7304 | } | ||||
7305 | |||||
7306 | void Sema::EvaluateImplicitExceptionSpec(SourceLocation Loc, FunctionDecl *FD) { | ||||
7307 | const FunctionProtoType *FPT = FD->getType()->castAs<FunctionProtoType>(); | ||||
7308 | if (FPT->getExceptionSpecType() != EST_Unevaluated) | ||||
7309 | return; | ||||
7310 | |||||
7311 | // Evaluate the exception specification. | ||||
7312 | auto IES = computeImplicitExceptionSpec(*this, Loc, FD); | ||||
7313 | auto ESI = IES.getExceptionSpec(); | ||||
7314 | |||||
7315 | // Update the type of the special member to use it. | ||||
7316 | UpdateExceptionSpec(FD, ESI); | ||||
7317 | } | ||||
7318 | |||||
7319 | void Sema::CheckExplicitlyDefaultedFunction(Scope *S, FunctionDecl *FD) { | ||||
7320 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7320, __extension__ __PRETTY_FUNCTION__)); | ||||
7321 | |||||
7322 | DefaultedFunctionKind DefKind = getDefaultedFunctionKind(FD); | ||||
7323 | if (!DefKind) { | ||||
7324 | assert(FD->getDeclContext()->isDependentContext())(static_cast <bool> (FD->getDeclContext()->isDependentContext ()) ? void (0) : __assert_fail ("FD->getDeclContext()->isDependentContext()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7324, __extension__ __PRETTY_FUNCTION__)); | ||||
7325 | return; | ||||
7326 | } | ||||
7327 | |||||
7328 | if (DefKind.isComparison()) | ||||
7329 | UnusedPrivateFields.clear(); | ||||
7330 | |||||
7331 | if (DefKind.isSpecialMember() | ||||
7332 | ? CheckExplicitlyDefaultedSpecialMember(cast<CXXMethodDecl>(FD), | ||||
7333 | DefKind.asSpecialMember()) | ||||
7334 | : CheckExplicitlyDefaultedComparison(S, FD, DefKind.asComparison())) | ||||
7335 | FD->setInvalidDecl(); | ||||
7336 | } | ||||
7337 | |||||
7338 | bool Sema::CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD, | ||||
7339 | CXXSpecialMember CSM) { | ||||
7340 | CXXRecordDecl *RD = MD->getParent(); | ||||
7341 | |||||
7342 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7343, __extension__ __PRETTY_FUNCTION__)) | ||||
7343 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7343, __extension__ __PRETTY_FUNCTION__)); | ||||
7344 | |||||
7345 | // Defer all checking for special members of a dependent type. | ||||
7346 | if (RD->isDependentType()) | ||||
7347 | return false; | ||||
7348 | |||||
7349 | // Whether this was the first-declared instance of the constructor. | ||||
7350 | // This affects whether we implicitly add an exception spec and constexpr. | ||||
7351 | bool First = MD == MD->getCanonicalDecl(); | ||||
7352 | |||||
7353 | bool HadError = false; | ||||
7354 | |||||
7355 | // C++11 [dcl.fct.def.default]p1: | ||||
7356 | // A function that is explicitly defaulted shall | ||||
7357 | // -- be a special member function [...] (checked elsewhere), | ||||
7358 | // -- have the same type (except for ref-qualifiers, and except that a | ||||
7359 | // copy operation can take a non-const reference) as an implicit | ||||
7360 | // declaration, and | ||||
7361 | // -- not have default arguments. | ||||
7362 | // C++2a changes the second bullet to instead delete the function if it's | ||||
7363 | // defaulted on its first declaration, unless it's "an assignment operator, | ||||
7364 | // and its return type differs or its parameter type is not a reference". | ||||
7365 | bool DeleteOnTypeMismatch = getLangOpts().CPlusPlus20 && First; | ||||
7366 | bool ShouldDeleteForTypeMismatch = false; | ||||
7367 | unsigned ExpectedParams = 1; | ||||
7368 | if (CSM == CXXDefaultConstructor || CSM == CXXDestructor) | ||||
7369 | ExpectedParams = 0; | ||||
7370 | if (MD->getNumParams() != ExpectedParams) { | ||||
7371 | // This checks for default arguments: a copy or move constructor with a | ||||
7372 | // default argument is classified as a default constructor, and assignment | ||||
7373 | // operations and destructors can't have default arguments. | ||||
7374 | Diag(MD->getLocation(), diag::err_defaulted_special_member_params) | ||||
7375 | << CSM << MD->getSourceRange(); | ||||
7376 | HadError = true; | ||||
7377 | } else if (MD->isVariadic()) { | ||||
7378 | if (DeleteOnTypeMismatch) | ||||
7379 | ShouldDeleteForTypeMismatch = true; | ||||
7380 | else { | ||||
7381 | Diag(MD->getLocation(), diag::err_defaulted_special_member_variadic) | ||||
7382 | << CSM << MD->getSourceRange(); | ||||
7383 | HadError = true; | ||||
7384 | } | ||||
7385 | } | ||||
7386 | |||||
7387 | const FunctionProtoType *Type = MD->getType()->getAs<FunctionProtoType>(); | ||||
7388 | |||||
7389 | bool CanHaveConstParam = false; | ||||
7390 | if (CSM == CXXCopyConstructor) | ||||
7391 | CanHaveConstParam = RD->implicitCopyConstructorHasConstParam(); | ||||
7392 | else if (CSM == CXXCopyAssignment) | ||||
7393 | CanHaveConstParam = RD->implicitCopyAssignmentHasConstParam(); | ||||
7394 | |||||
7395 | QualType ReturnType = Context.VoidTy; | ||||
7396 | if (CSM == CXXCopyAssignment || CSM == CXXMoveAssignment) { | ||||
7397 | // Check for return type matching. | ||||
7398 | ReturnType = Type->getReturnType(); | ||||
7399 | |||||
7400 | QualType DeclType = Context.getTypeDeclType(RD); | ||||
7401 | DeclType = Context.getAddrSpaceQualType(DeclType, MD->getMethodQualifiers().getAddressSpace()); | ||||
7402 | QualType ExpectedReturnType = Context.getLValueReferenceType(DeclType); | ||||
7403 | |||||
7404 | if (!Context.hasSameType(ReturnType, ExpectedReturnType)) { | ||||
7405 | Diag(MD->getLocation(), diag::err_defaulted_special_member_return_type) | ||||
7406 | << (CSM == CXXMoveAssignment) << ExpectedReturnType; | ||||
7407 | HadError = true; | ||||
7408 | } | ||||
7409 | |||||
7410 | // A defaulted special member cannot have cv-qualifiers. | ||||
7411 | if (Type->getMethodQuals().hasConst() || Type->getMethodQuals().hasVolatile()) { | ||||
7412 | if (DeleteOnTypeMismatch) | ||||
7413 | ShouldDeleteForTypeMismatch = true; | ||||
7414 | else { | ||||
7415 | Diag(MD->getLocation(), diag::err_defaulted_special_member_quals) | ||||
7416 | << (CSM == CXXMoveAssignment) << getLangOpts().CPlusPlus14; | ||||
7417 | HadError = true; | ||||
7418 | } | ||||
7419 | } | ||||
7420 | } | ||||
7421 | |||||
7422 | // Check for parameter type matching. | ||||
7423 | QualType ArgType = ExpectedParams ? Type->getParamType(0) : QualType(); | ||||
7424 | bool HasConstParam = false; | ||||
7425 | if (ExpectedParams && ArgType->isReferenceType()) { | ||||
7426 | // Argument must be reference to possibly-const T. | ||||
7427 | QualType ReferentType = ArgType->getPointeeType(); | ||||
7428 | HasConstParam = ReferentType.isConstQualified(); | ||||
7429 | |||||
7430 | if (ReferentType.isVolatileQualified()) { | ||||
7431 | if (DeleteOnTypeMismatch) | ||||
7432 | ShouldDeleteForTypeMismatch = true; | ||||
7433 | else { | ||||
7434 | Diag(MD->getLocation(), | ||||
7435 | diag::err_defaulted_special_member_volatile_param) << CSM; | ||||
7436 | HadError = true; | ||||
7437 | } | ||||
7438 | } | ||||
7439 | |||||
7440 | if (HasConstParam && !CanHaveConstParam) { | ||||
7441 | if (DeleteOnTypeMismatch) | ||||
7442 | ShouldDeleteForTypeMismatch = true; | ||||
7443 | else if (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment) { | ||||
7444 | Diag(MD->getLocation(), | ||||
7445 | diag::err_defaulted_special_member_copy_const_param) | ||||
7446 | << (CSM == CXXCopyAssignment); | ||||
7447 | // FIXME: Explain why this special member can't be const. | ||||
7448 | HadError = true; | ||||
7449 | } else { | ||||
7450 | Diag(MD->getLocation(), | ||||
7451 | diag::err_defaulted_special_member_move_const_param) | ||||
7452 | << (CSM == CXXMoveAssignment); | ||||
7453 | HadError = true; | ||||
7454 | } | ||||
7455 | } | ||||
7456 | } else if (ExpectedParams) { | ||||
7457 | // A copy assignment operator can take its argument by value, but a | ||||
7458 | // defaulted one cannot. | ||||
7459 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7459, __extension__ __PRETTY_FUNCTION__)); | ||||
7460 | Diag(MD->getLocation(), diag::err_defaulted_copy_assign_not_ref); | ||||
7461 | HadError = true; | ||||
7462 | } | ||||
7463 | |||||
7464 | // C++11 [dcl.fct.def.default]p2: | ||||
7465 | // An explicitly-defaulted function may be declared constexpr only if it | ||||
7466 | // would have been implicitly declared as constexpr, | ||||
7467 | // Do not apply this rule to members of class templates, since core issue 1358 | ||||
7468 | // makes such functions always instantiate to constexpr functions. For | ||||
7469 | // functions which cannot be constexpr (for non-constructors in C++11 and for | ||||
7470 | // destructors in C++14 and C++17), this is checked elsewhere. | ||||
7471 | // | ||||
7472 | // FIXME: This should not apply if the member is deleted. | ||||
7473 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, RD, CSM, | ||||
7474 | HasConstParam); | ||||
7475 | if ((getLangOpts().CPlusPlus20 || | ||||
7476 | (getLangOpts().CPlusPlus14 ? !isa<CXXDestructorDecl>(MD) | ||||
7477 | : isa<CXXConstructorDecl>(MD))) && | ||||
7478 | MD->isConstexpr() && !Constexpr && | ||||
7479 | MD->getTemplatedKind() == FunctionDecl::TK_NonTemplate) { | ||||
7480 | Diag(MD->getBeginLoc(), MD->isConsteval() | ||||
7481 | ? diag::err_incorrect_defaulted_consteval | ||||
7482 | : diag::err_incorrect_defaulted_constexpr) | ||||
7483 | << CSM; | ||||
7484 | // FIXME: Explain why the special member can't be constexpr. | ||||
7485 | HadError = true; | ||||
7486 | } | ||||
7487 | |||||
7488 | if (First) { | ||||
7489 | // C++2a [dcl.fct.def.default]p3: | ||||
7490 | // If a function is explicitly defaulted on its first declaration, it is | ||||
7491 | // implicitly considered to be constexpr if the implicit declaration | ||||
7492 | // would be. | ||||
7493 | MD->setConstexprKind(Constexpr ? (MD->isConsteval() | ||||
7494 | ? ConstexprSpecKind::Consteval | ||||
7495 | : ConstexprSpecKind::Constexpr) | ||||
7496 | : ConstexprSpecKind::Unspecified); | ||||
7497 | |||||
7498 | if (!Type->hasExceptionSpec()) { | ||||
7499 | // C++2a [except.spec]p3: | ||||
7500 | // If a declaration of a function does not have a noexcept-specifier | ||||
7501 | // [and] is defaulted on its first declaration, [...] the exception | ||||
7502 | // specification is as specified below | ||||
7503 | FunctionProtoType::ExtProtoInfo EPI = Type->getExtProtoInfo(); | ||||
7504 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||
7505 | EPI.ExceptionSpec.SourceDecl = MD; | ||||
7506 | MD->setType(Context.getFunctionType(ReturnType, | ||||
7507 | llvm::makeArrayRef(&ArgType, | ||||
7508 | ExpectedParams), | ||||
7509 | EPI)); | ||||
7510 | } | ||||
7511 | } | ||||
7512 | |||||
7513 | if (ShouldDeleteForTypeMismatch || ShouldDeleteSpecialMember(MD, CSM)) { | ||||
7514 | if (First) { | ||||
7515 | SetDeclDeleted(MD, MD->getLocation()); | ||||
7516 | if (!inTemplateInstantiation() && !HadError) { | ||||
7517 | Diag(MD->getLocation(), diag::warn_defaulted_method_deleted) << CSM; | ||||
7518 | if (ShouldDeleteForTypeMismatch) { | ||||
7519 | Diag(MD->getLocation(), diag::note_deleted_type_mismatch) << CSM; | ||||
7520 | } else { | ||||
7521 | ShouldDeleteSpecialMember(MD, CSM, nullptr, /*Diagnose*/true); | ||||
7522 | } | ||||
7523 | } | ||||
7524 | if (ShouldDeleteForTypeMismatch && !HadError) { | ||||
7525 | Diag(MD->getLocation(), | ||||
7526 | diag::warn_cxx17_compat_defaulted_method_type_mismatch) << CSM; | ||||
7527 | } | ||||
7528 | } else { | ||||
7529 | // C++11 [dcl.fct.def.default]p4: | ||||
7530 | // [For a] user-provided explicitly-defaulted function [...] if such a | ||||
7531 | // function is implicitly defined as deleted, the program is ill-formed. | ||||
7532 | Diag(MD->getLocation(), diag::err_out_of_line_default_deletes) << CSM; | ||||
7533 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7533, __extension__ __PRETTY_FUNCTION__)); | ||||
7534 | ShouldDeleteSpecialMember(MD, CSM, nullptr, /*Diagnose*/true); | ||||
7535 | HadError = true; | ||||
7536 | } | ||||
7537 | } | ||||
7538 | |||||
7539 | return HadError; | ||||
7540 | } | ||||
7541 | |||||
7542 | namespace { | ||||
7543 | /// Helper class for building and checking a defaulted comparison. | ||||
7544 | /// | ||||
7545 | /// Defaulted functions are built in two phases: | ||||
7546 | /// | ||||
7547 | /// * First, the set of operations that the function will perform are | ||||
7548 | /// identified, and some of them are checked. If any of the checked | ||||
7549 | /// operations is invalid in certain ways, the comparison function is | ||||
7550 | /// defined as deleted and no body is built. | ||||
7551 | /// * Then, if the function is not defined as deleted, the body is built. | ||||
7552 | /// | ||||
7553 | /// This is accomplished by performing two visitation steps over the eventual | ||||
7554 | /// body of the function. | ||||
7555 | template<typename Derived, typename ResultList, typename Result, | ||||
7556 | typename Subobject> | ||||
7557 | class DefaultedComparisonVisitor { | ||||
7558 | public: | ||||
7559 | using DefaultedComparisonKind = Sema::DefaultedComparisonKind; | ||||
7560 | |||||
7561 | DefaultedComparisonVisitor(Sema &S, CXXRecordDecl *RD, FunctionDecl *FD, | ||||
7562 | DefaultedComparisonKind DCK) | ||||
7563 | : S(S), RD(RD), FD(FD), DCK(DCK) { | ||||
7564 | if (auto *Info = FD->getDefaultedFunctionInfo()) { | ||||
7565 | // FIXME: Change CreateOverloadedBinOp to take an ArrayRef instead of an | ||||
7566 | // UnresolvedSet to avoid this copy. | ||||
7567 | Fns.assign(Info->getUnqualifiedLookups().begin(), | ||||
7568 | Info->getUnqualifiedLookups().end()); | ||||
7569 | } | ||||
7570 | } | ||||
7571 | |||||
7572 | ResultList visit() { | ||||
7573 | // The type of an lvalue naming a parameter of this function. | ||||
7574 | QualType ParamLvalType = | ||||
7575 | FD->getParamDecl(0)->getType().getNonReferenceType(); | ||||
7576 | |||||
7577 | ResultList Results; | ||||
7578 | |||||
7579 | switch (DCK) { | ||||
7580 | case DefaultedComparisonKind::None: | ||||
7581 | llvm_unreachable("not a defaulted comparison")::llvm::llvm_unreachable_internal("not a defaulted comparison" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7581); | ||||
7582 | |||||
7583 | case DefaultedComparisonKind::Equal: | ||||
7584 | case DefaultedComparisonKind::ThreeWay: | ||||
7585 | getDerived().visitSubobjects(Results, RD, ParamLvalType.getQualifiers()); | ||||
7586 | return Results; | ||||
7587 | |||||
7588 | case DefaultedComparisonKind::NotEqual: | ||||
7589 | case DefaultedComparisonKind::Relational: | ||||
7590 | Results.add(getDerived().visitExpandedSubobject( | ||||
7591 | ParamLvalType, getDerived().getCompleteObject())); | ||||
7592 | return Results; | ||||
7593 | } | ||||
7594 | llvm_unreachable("")::llvm::llvm_unreachable_internal("", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7594); | ||||
7595 | } | ||||
7596 | |||||
7597 | protected: | ||||
7598 | Derived &getDerived() { return static_cast<Derived&>(*this); } | ||||
7599 | |||||
7600 | /// Visit the expanded list of subobjects of the given type, as specified in | ||||
7601 | /// C++2a [class.compare.default]. | ||||
7602 | /// | ||||
7603 | /// \return \c true if the ResultList object said we're done, \c false if not. | ||||
7604 | bool visitSubobjects(ResultList &Results, CXXRecordDecl *Record, | ||||
7605 | Qualifiers Quals) { | ||||
7606 | // C++2a [class.compare.default]p4: | ||||
7607 | // The direct base class subobjects of C | ||||
7608 | for (CXXBaseSpecifier &Base : Record->bases()) | ||||
7609 | if (Results.add(getDerived().visitSubobject( | ||||
7610 | S.Context.getQualifiedType(Base.getType(), Quals), | ||||
7611 | getDerived().getBase(&Base)))) | ||||
7612 | return true; | ||||
7613 | |||||
7614 | // followed by the non-static data members of C | ||||
7615 | for (FieldDecl *Field : Record->fields()) { | ||||
7616 | // Recursively expand anonymous structs. | ||||
7617 | if (Field->isAnonymousStructOrUnion()) { | ||||
7618 | if (visitSubobjects(Results, Field->getType()->getAsCXXRecordDecl(), | ||||
7619 | Quals)) | ||||
7620 | return true; | ||||
7621 | continue; | ||||
7622 | } | ||||
7623 | |||||
7624 | // Figure out the type of an lvalue denoting this field. | ||||
7625 | Qualifiers FieldQuals = Quals; | ||||
7626 | if (Field->isMutable()) | ||||
7627 | FieldQuals.removeConst(); | ||||
7628 | QualType FieldType = | ||||
7629 | S.Context.getQualifiedType(Field->getType(), FieldQuals); | ||||
7630 | |||||
7631 | if (Results.add(getDerived().visitSubobject( | ||||
7632 | FieldType, getDerived().getField(Field)))) | ||||
7633 | return true; | ||||
7634 | } | ||||
7635 | |||||
7636 | // form a list of subobjects. | ||||
7637 | return false; | ||||
7638 | } | ||||
7639 | |||||
7640 | Result visitSubobject(QualType Type, Subobject Subobj) { | ||||
7641 | // In that list, any subobject of array type is recursively expanded | ||||
7642 | const ArrayType *AT = S.Context.getAsArrayType(Type); | ||||
7643 | if (auto *CAT = dyn_cast_or_null<ConstantArrayType>(AT)) | ||||
7644 | return getDerived().visitSubobjectArray(CAT->getElementType(), | ||||
7645 | CAT->getSize(), Subobj); | ||||
7646 | return getDerived().visitExpandedSubobject(Type, Subobj); | ||||
7647 | } | ||||
7648 | |||||
7649 | Result visitSubobjectArray(QualType Type, const llvm::APInt &Size, | ||||
7650 | Subobject Subobj) { | ||||
7651 | return getDerived().visitSubobject(Type, Subobj); | ||||
7652 | } | ||||
7653 | |||||
7654 | protected: | ||||
7655 | Sema &S; | ||||
7656 | CXXRecordDecl *RD; | ||||
7657 | FunctionDecl *FD; | ||||
7658 | DefaultedComparisonKind DCK; | ||||
7659 | UnresolvedSet<16> Fns; | ||||
7660 | }; | ||||
7661 | |||||
7662 | /// Information about a defaulted comparison, as determined by | ||||
7663 | /// DefaultedComparisonAnalyzer. | ||||
7664 | struct DefaultedComparisonInfo { | ||||
7665 | bool Deleted = false; | ||||
7666 | bool Constexpr = true; | ||||
7667 | ComparisonCategoryType Category = ComparisonCategoryType::StrongOrdering; | ||||
7668 | |||||
7669 | static DefaultedComparisonInfo deleted() { | ||||
7670 | DefaultedComparisonInfo Deleted; | ||||
7671 | Deleted.Deleted = true; | ||||
7672 | return Deleted; | ||||
7673 | } | ||||
7674 | |||||
7675 | bool add(const DefaultedComparisonInfo &R) { | ||||
7676 | Deleted |= R.Deleted; | ||||
7677 | Constexpr &= R.Constexpr; | ||||
7678 | Category = commonComparisonType(Category, R.Category); | ||||
7679 | return Deleted; | ||||
7680 | } | ||||
7681 | }; | ||||
7682 | |||||
7683 | /// An element in the expanded list of subobjects of a defaulted comparison, as | ||||
7684 | /// specified in C++2a [class.compare.default]p4. | ||||
7685 | struct DefaultedComparisonSubobject { | ||||
7686 | enum { CompleteObject, Member, Base } Kind; | ||||
7687 | NamedDecl *Decl; | ||||
7688 | SourceLocation Loc; | ||||
7689 | }; | ||||
7690 | |||||
7691 | /// A visitor over the notional body of a defaulted comparison that determines | ||||
7692 | /// whether that body would be deleted or constexpr. | ||||
7693 | class DefaultedComparisonAnalyzer | ||||
7694 | : public DefaultedComparisonVisitor<DefaultedComparisonAnalyzer, | ||||
7695 | DefaultedComparisonInfo, | ||||
7696 | DefaultedComparisonInfo, | ||||
7697 | DefaultedComparisonSubobject> { | ||||
7698 | public: | ||||
7699 | enum DiagnosticKind { NoDiagnostics, ExplainDeleted, ExplainConstexpr }; | ||||
7700 | |||||
7701 | private: | ||||
7702 | DiagnosticKind Diagnose; | ||||
7703 | |||||
7704 | public: | ||||
7705 | using Base = DefaultedComparisonVisitor; | ||||
7706 | using Result = DefaultedComparisonInfo; | ||||
7707 | using Subobject = DefaultedComparisonSubobject; | ||||
7708 | |||||
7709 | friend Base; | ||||
7710 | |||||
7711 | DefaultedComparisonAnalyzer(Sema &S, CXXRecordDecl *RD, FunctionDecl *FD, | ||||
7712 | DefaultedComparisonKind DCK, | ||||
7713 | DiagnosticKind Diagnose = NoDiagnostics) | ||||
7714 | : Base(S, RD, FD, DCK), Diagnose(Diagnose) {} | ||||
7715 | |||||
7716 | Result visit() { | ||||
7717 | if ((DCK == DefaultedComparisonKind::Equal || | ||||
7718 | DCK == DefaultedComparisonKind::ThreeWay) && | ||||
7719 | RD->hasVariantMembers()) { | ||||
7720 | // C++2a [class.compare.default]p2 [P2002R0]: | ||||
7721 | // A defaulted comparison operator function for class C is defined as | ||||
7722 | // deleted if [...] C has variant members. | ||||
7723 | if (Diagnose == ExplainDeleted) { | ||||
7724 | S.Diag(FD->getLocation(), diag::note_defaulted_comparison_union) | ||||
7725 | << FD << RD->isUnion() << RD; | ||||
7726 | } | ||||
7727 | return Result::deleted(); | ||||
7728 | } | ||||
7729 | |||||
7730 | return Base::visit(); | ||||
7731 | } | ||||
7732 | |||||
7733 | private: | ||||
7734 | Subobject getCompleteObject() { | ||||
7735 | return Subobject{Subobject::CompleteObject, RD, FD->getLocation()}; | ||||
7736 | } | ||||
7737 | |||||
7738 | Subobject getBase(CXXBaseSpecifier *Base) { | ||||
7739 | return Subobject{Subobject::Base, Base->getType()->getAsCXXRecordDecl(), | ||||
7740 | Base->getBaseTypeLoc()}; | ||||
7741 | } | ||||
7742 | |||||
7743 | Subobject getField(FieldDecl *Field) { | ||||
7744 | return Subobject{Subobject::Member, Field, Field->getLocation()}; | ||||
7745 | } | ||||
7746 | |||||
7747 | Result visitExpandedSubobject(QualType Type, Subobject Subobj) { | ||||
7748 | // C++2a [class.compare.default]p2 [P2002R0]: | ||||
7749 | // A defaulted <=> or == operator function for class C is defined as | ||||
7750 | // deleted if any non-static data member of C is of reference type | ||||
7751 | if (Type->isReferenceType()) { | ||||
7752 | if (Diagnose == ExplainDeleted) { | ||||
7753 | S.Diag(Subobj.Loc, diag::note_defaulted_comparison_reference_member) | ||||
7754 | << FD << RD; | ||||
7755 | } | ||||
7756 | return Result::deleted(); | ||||
7757 | } | ||||
7758 | |||||
7759 | // [...] Let xi be an lvalue denoting the ith element [...] | ||||
7760 | OpaqueValueExpr Xi(FD->getLocation(), Type, VK_LValue); | ||||
7761 | Expr *Args[] = {&Xi, &Xi}; | ||||
7762 | |||||
7763 | // All operators start by trying to apply that same operator recursively. | ||||
7764 | OverloadedOperatorKind OO = FD->getOverloadedOperator(); | ||||
7765 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7765, __extension__ __PRETTY_FUNCTION__)); | ||||
7766 | return visitBinaryOperator(OO, Args, Subobj); | ||||
7767 | } | ||||
7768 | |||||
7769 | Result | ||||
7770 | visitBinaryOperator(OverloadedOperatorKind OO, ArrayRef<Expr *> Args, | ||||
7771 | Subobject Subobj, | ||||
7772 | OverloadCandidateSet *SpaceshipCandidates = nullptr) { | ||||
7773 | // Note that there is no need to consider rewritten candidates here if | ||||
7774 | // we've already found there is no viable 'operator<=>' candidate (and are | ||||
7775 | // considering synthesizing a '<=>' from '==' and '<'). | ||||
7776 | OverloadCandidateSet CandidateSet( | ||||
7777 | FD->getLocation(), OverloadCandidateSet::CSK_Operator, | ||||
7778 | OverloadCandidateSet::OperatorRewriteInfo( | ||||
7779 | OO, /*AllowRewrittenCandidates=*/!SpaceshipCandidates)); | ||||
7780 | |||||
7781 | /// C++2a [class.compare.default]p1 [P2002R0]: | ||||
7782 | /// [...] the defaulted function itself is never a candidate for overload | ||||
7783 | /// resolution [...] | ||||
7784 | CandidateSet.exclude(FD); | ||||
7785 | |||||
7786 | if (Args[0]->getType()->isOverloadableType()) | ||||
7787 | S.LookupOverloadedBinOp(CandidateSet, OO, Fns, Args); | ||||
7788 | else | ||||
7789 | // FIXME: We determine whether this is a valid expression by checking to | ||||
7790 | // see if there's a viable builtin operator candidate for it. That isn't | ||||
7791 | // really what the rules ask us to do, but should give the right results. | ||||
7792 | S.AddBuiltinOperatorCandidates(OO, FD->getLocation(), Args, CandidateSet); | ||||
7793 | |||||
7794 | Result R; | ||||
7795 | |||||
7796 | OverloadCandidateSet::iterator Best; | ||||
7797 | switch (CandidateSet.BestViableFunction(S, FD->getLocation(), Best)) { | ||||
7798 | case OR_Success: { | ||||
7799 | // C++2a [class.compare.secondary]p2 [P2002R0]: | ||||
7800 | // The operator function [...] is defined as deleted if [...] the | ||||
7801 | // candidate selected by overload resolution is not a rewritten | ||||
7802 | // candidate. | ||||
7803 | if ((DCK == DefaultedComparisonKind::NotEqual || | ||||
7804 | DCK == DefaultedComparisonKind::Relational) && | ||||
7805 | !Best->RewriteKind) { | ||||
7806 | if (Diagnose == ExplainDeleted) { | ||||
7807 | S.Diag(Best->Function->getLocation(), | ||||
7808 | diag::note_defaulted_comparison_not_rewritten_callee) | ||||
7809 | << FD; | ||||
7810 | } | ||||
7811 | return Result::deleted(); | ||||
7812 | } | ||||
7813 | |||||
7814 | // Throughout C++2a [class.compare]: if overload resolution does not | ||||
7815 | // result in a usable function, the candidate function is defined as | ||||
7816 | // deleted. This requires that we selected an accessible function. | ||||
7817 | // | ||||
7818 | // Note that this only considers the access of the function when named | ||||
7819 | // within the type of the subobject, and not the access path for any | ||||
7820 | // derived-to-base conversion. | ||||
7821 | CXXRecordDecl *ArgClass = Args[0]->getType()->getAsCXXRecordDecl(); | ||||
7822 | if (ArgClass && Best->FoundDecl.getDecl() && | ||||
7823 | Best->FoundDecl.getDecl()->isCXXClassMember()) { | ||||
7824 | QualType ObjectType = Subobj.Kind == Subobject::Member | ||||
7825 | ? Args[0]->getType() | ||||
7826 | : S.Context.getRecordType(RD); | ||||
7827 | if (!S.isMemberAccessibleForDeletion( | ||||
7828 | ArgClass, Best->FoundDecl, ObjectType, Subobj.Loc, | ||||
7829 | Diagnose == ExplainDeleted | ||||
7830 | ? S.PDiag(diag::note_defaulted_comparison_inaccessible) | ||||
7831 | << FD << Subobj.Kind << Subobj.Decl | ||||
7832 | : S.PDiag())) | ||||
7833 | return Result::deleted(); | ||||
7834 | } | ||||
7835 | |||||
7836 | bool NeedsDeducing = | ||||
7837 | OO == OO_Spaceship && FD->getReturnType()->isUndeducedAutoType(); | ||||
7838 | |||||
7839 | if (FunctionDecl *BestFD = Best->Function) { | ||||
7840 | // C++2a [class.compare.default]p3 [P2002R0]: | ||||
7841 | // A defaulted comparison function is constexpr-compatible if | ||||
7842 | // [...] no overlod resolution performed [...] results in a | ||||
7843 | // non-constexpr function. | ||||
7844 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7844, __extension__ __PRETTY_FUNCTION__)); | ||||
7845 | // If it's not constexpr, explain why not. | ||||
7846 | if (Diagnose == ExplainConstexpr && !BestFD->isConstexpr()) { | ||||
7847 | if (Subobj.Kind != Subobject::CompleteObject) | ||||
7848 | S.Diag(Subobj.Loc, diag::note_defaulted_comparison_not_constexpr) | ||||
7849 | << Subobj.Kind << Subobj.Decl; | ||||
7850 | S.Diag(BestFD->getLocation(), | ||||
7851 | diag::note_defaulted_comparison_not_constexpr_here); | ||||
7852 | // Bail out after explaining; we don't want any more notes. | ||||
7853 | return Result::deleted(); | ||||
7854 | } | ||||
7855 | R.Constexpr &= BestFD->isConstexpr(); | ||||
7856 | |||||
7857 | if (NeedsDeducing) { | ||||
7858 | // If any callee has an undeduced return type, deduce it now. | ||||
7859 | // FIXME: It's not clear how a failure here should be handled. For | ||||
7860 | // now, we produce an eager diagnostic, because that is forward | ||||
7861 | // compatible with most (all?) other reasonable options. | ||||
7862 | if (BestFD->getReturnType()->isUndeducedType() && | ||||
7863 | S.DeduceReturnType(BestFD, FD->getLocation(), | ||||
7864 | /*Diagnose=*/false)) { | ||||
7865 | // Don't produce a duplicate error when asked to explain why the | ||||
7866 | // comparison is deleted: we diagnosed that when initially checking | ||||
7867 | // the defaulted operator. | ||||
7868 | if (Diagnose == NoDiagnostics) { | ||||
7869 | S.Diag( | ||||
7870 | FD->getLocation(), | ||||
7871 | diag::err_defaulted_comparison_cannot_deduce_undeduced_auto) | ||||
7872 | << Subobj.Kind << Subobj.Decl; | ||||
7873 | S.Diag( | ||||
7874 | Subobj.Loc, | ||||
7875 | diag::note_defaulted_comparison_cannot_deduce_undeduced_auto) | ||||
7876 | << Subobj.Kind << Subobj.Decl; | ||||
7877 | S.Diag(BestFD->getLocation(), | ||||
7878 | diag::note_defaulted_comparison_cannot_deduce_callee) | ||||
7879 | << Subobj.Kind << Subobj.Decl; | ||||
7880 | } | ||||
7881 | return Result::deleted(); | ||||
7882 | } | ||||
7883 | auto *Info = S.Context.CompCategories.lookupInfoForType( | ||||
7884 | BestFD->getCallResultType()); | ||||
7885 | if (!Info) { | ||||
7886 | if (Diagnose == ExplainDeleted) { | ||||
7887 | S.Diag(Subobj.Loc, diag::note_defaulted_comparison_cannot_deduce) | ||||
7888 | << Subobj.Kind << Subobj.Decl | ||||
7889 | << BestFD->getCallResultType().withoutLocalFastQualifiers(); | ||||
7890 | S.Diag(BestFD->getLocation(), | ||||
7891 | diag::note_defaulted_comparison_cannot_deduce_callee) | ||||
7892 | << Subobj.Kind << Subobj.Decl; | ||||
7893 | } | ||||
7894 | return Result::deleted(); | ||||
7895 | } | ||||
7896 | R.Category = Info->Kind; | ||||
7897 | } | ||||
7898 | } else { | ||||
7899 | QualType T = Best->BuiltinParamTypes[0]; | ||||
7900 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7901, __extension__ __PRETTY_FUNCTION__)) | ||||
7901 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7901, __extension__ __PRETTY_FUNCTION__)); | ||||
7902 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7903, __extension__ __PRETTY_FUNCTION__)) | ||||
7903 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7903, __extension__ __PRETTY_FUNCTION__)); | ||||
7904 | |||||
7905 | if (NeedsDeducing) { | ||||
7906 | Optional<ComparisonCategoryType> Cat = | ||||
7907 | getComparisonCategoryForBuiltinCmp(T); | ||||
7908 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 7908, __extension__ __PRETTY_FUNCTION__)); | ||||
7909 | R.Category = *Cat; | ||||
7910 | } | ||||
7911 | } | ||||
7912 | |||||
7913 | // Note that we might be rewriting to a different operator. That call is | ||||
7914 | // not considered until we come to actually build the comparison function. | ||||
7915 | break; | ||||
7916 | } | ||||
7917 | |||||
7918 | case OR_Ambiguous: | ||||
7919 | if (Diagnose == ExplainDeleted) { | ||||
7920 | unsigned Kind = 0; | ||||
7921 | if (FD->getOverloadedOperator() == OO_Spaceship && OO != OO_Spaceship) | ||||
7922 | Kind = OO == OO_EqualEqual ? 1 : 2; | ||||
7923 | CandidateSet.NoteCandidates( | ||||
7924 | PartialDiagnosticAt( | ||||
7925 | Subobj.Loc, S.PDiag(diag::note_defaulted_comparison_ambiguous) | ||||
7926 | << FD << Kind << Subobj.Kind << Subobj.Decl), | ||||
7927 | S, OCD_AmbiguousCandidates, Args); | ||||
7928 | } | ||||
7929 | R = Result::deleted(); | ||||
7930 | break; | ||||
7931 | |||||
7932 | case OR_Deleted: | ||||
7933 | if (Diagnose == ExplainDeleted) { | ||||
7934 | if ((DCK == DefaultedComparisonKind::NotEqual || | ||||
7935 | DCK == DefaultedComparisonKind::Relational) && | ||||
7936 | !Best->RewriteKind) { | ||||
7937 | S.Diag(Best->Function->getLocation(), | ||||
7938 | diag::note_defaulted_comparison_not_rewritten_callee) | ||||
7939 | << FD; | ||||
7940 | } else { | ||||
7941 | S.Diag(Subobj.Loc, | ||||
7942 | diag::note_defaulted_comparison_calls_deleted) | ||||
7943 | << FD << Subobj.Kind << Subobj.Decl; | ||||
7944 | S.NoteDeletedFunction(Best->Function); | ||||
7945 | } | ||||
7946 | } | ||||
7947 | R = Result::deleted(); | ||||
7948 | break; | ||||
7949 | |||||
7950 | case OR_No_Viable_Function: | ||||
7951 | // If there's no usable candidate, we're done unless we can rewrite a | ||||
7952 | // '<=>' in terms of '==' and '<'. | ||||
7953 | if (OO == OO_Spaceship && | ||||
7954 | S.Context.CompCategories.lookupInfoForType(FD->getReturnType())) { | ||||
7955 | // For any kind of comparison category return type, we need a usable | ||||
7956 | // '==' and a usable '<'. | ||||
7957 | if (!R.add(visitBinaryOperator(OO_EqualEqual, Args, Subobj, | ||||
7958 | &CandidateSet))) | ||||
7959 | R.add(visitBinaryOperator(OO_Less, Args, Subobj, &CandidateSet)); | ||||
7960 | break; | ||||
7961 | } | ||||
7962 | |||||
7963 | if (Diagnose == ExplainDeleted) { | ||||
7964 | S.Diag(Subobj.Loc, diag::note_defaulted_comparison_no_viable_function) | ||||
7965 | << FD << Subobj.Kind << Subobj.Decl; | ||||
7966 | |||||
7967 | // For a three-way comparison, list both the candidates for the | ||||
7968 | // original operator and the candidates for the synthesized operator. | ||||
7969 | if (SpaceshipCandidates) { | ||||
7970 | SpaceshipCandidates->NoteCandidates( | ||||
7971 | S, Args, | ||||
7972 | SpaceshipCandidates->CompleteCandidates(S, OCD_AllCandidates, | ||||
7973 | Args, FD->getLocation())); | ||||
7974 | S.Diag(Subobj.Loc, | ||||
7975 | diag::note_defaulted_comparison_no_viable_function_synthesized) | ||||
7976 | << (OO == OO_EqualEqual ? 0 : 1); | ||||
7977 | } | ||||
7978 | |||||
7979 | CandidateSet.NoteCandidates( | ||||
7980 | S, Args, | ||||
7981 | CandidateSet.CompleteCandidates(S, OCD_AllCandidates, Args, | ||||
7982 | FD->getLocation())); | ||||
7983 | } | ||||
7984 | R = Result::deleted(); | ||||
7985 | break; | ||||
7986 | } | ||||
7987 | |||||
7988 | return R; | ||||
7989 | } | ||||
7990 | }; | ||||
7991 | |||||
7992 | /// A list of statements. | ||||
7993 | struct StmtListResult { | ||||
7994 | bool IsInvalid = false; | ||||
7995 | llvm::SmallVector<Stmt*, 16> Stmts; | ||||
7996 | |||||
7997 | bool add(const StmtResult &S) { | ||||
7998 | IsInvalid |= S.isInvalid(); | ||||
7999 | if (IsInvalid) | ||||
8000 | return true; | ||||
8001 | Stmts.push_back(S.get()); | ||||
8002 | return false; | ||||
8003 | } | ||||
8004 | }; | ||||
8005 | |||||
8006 | /// A visitor over the notional body of a defaulted comparison that synthesizes | ||||
8007 | /// the actual body. | ||||
8008 | class DefaultedComparisonSynthesizer | ||||
8009 | : public DefaultedComparisonVisitor<DefaultedComparisonSynthesizer, | ||||
8010 | StmtListResult, StmtResult, | ||||
8011 | std::pair<ExprResult, ExprResult>> { | ||||
8012 | SourceLocation Loc; | ||||
8013 | unsigned ArrayDepth = 0; | ||||
8014 | |||||
8015 | public: | ||||
8016 | using Base = DefaultedComparisonVisitor; | ||||
8017 | using ExprPair = std::pair<ExprResult, ExprResult>; | ||||
8018 | |||||
8019 | friend Base; | ||||
8020 | |||||
8021 | DefaultedComparisonSynthesizer(Sema &S, CXXRecordDecl *RD, FunctionDecl *FD, | ||||
8022 | DefaultedComparisonKind DCK, | ||||
8023 | SourceLocation BodyLoc) | ||||
8024 | : Base(S, RD, FD, DCK), Loc(BodyLoc) {} | ||||
8025 | |||||
8026 | /// Build a suitable function body for this defaulted comparison operator. | ||||
8027 | StmtResult build() { | ||||
8028 | Sema::CompoundScopeRAII CompoundScope(S); | ||||
8029 | |||||
8030 | StmtListResult Stmts = visit(); | ||||
8031 | if (Stmts.IsInvalid) | ||||
8032 | return StmtError(); | ||||
8033 | |||||
8034 | ExprResult RetVal; | ||||
8035 | switch (DCK) { | ||||
8036 | case DefaultedComparisonKind::None: | ||||
8037 | llvm_unreachable("not a defaulted comparison")::llvm::llvm_unreachable_internal("not a defaulted comparison" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8037); | ||||
8038 | |||||
8039 | case DefaultedComparisonKind::Equal: { | ||||
8040 | // C++2a [class.eq]p3: | ||||
8041 | // [...] compar[e] the corresponding elements [...] until the first | ||||
8042 | // index i where xi == yi yields [...] false. If no such index exists, | ||||
8043 | // V is true. Otherwise, V is false. | ||||
8044 | // | ||||
8045 | // Join the comparisons with '&&'s and return the result. Use a right | ||||
8046 | // fold (traversing the conditions right-to-left), because that | ||||
8047 | // short-circuits more naturally. | ||||
8048 | auto OldStmts = std::move(Stmts.Stmts); | ||||
8049 | Stmts.Stmts.clear(); | ||||
8050 | ExprResult CmpSoFar; | ||||
8051 | // Finish a particular comparison chain. | ||||
8052 | auto FinishCmp = [&] { | ||||
8053 | if (Expr *Prior = CmpSoFar.get()) { | ||||
8054 | // Convert the last expression to 'return ...;' | ||||
8055 | if (RetVal.isUnset() && Stmts.Stmts.empty()) | ||||
8056 | RetVal = CmpSoFar; | ||||
8057 | // Convert any prior comparison to 'if (!(...)) return false;' | ||||
8058 | else if (Stmts.add(buildIfNotCondReturnFalse(Prior))) | ||||
8059 | return true; | ||||
8060 | CmpSoFar = ExprResult(); | ||||
8061 | } | ||||
8062 | return false; | ||||
8063 | }; | ||||
8064 | for (Stmt *EAsStmt : llvm::reverse(OldStmts)) { | ||||
8065 | Expr *E = dyn_cast<Expr>(EAsStmt); | ||||
8066 | if (!E) { | ||||
8067 | // Found an array comparison. | ||||
8068 | if (FinishCmp() || Stmts.add(EAsStmt)) | ||||
8069 | return StmtError(); | ||||
8070 | continue; | ||||
8071 | } | ||||
8072 | |||||
8073 | if (CmpSoFar.isUnset()) { | ||||
8074 | CmpSoFar = E; | ||||
8075 | continue; | ||||
8076 | } | ||||
8077 | CmpSoFar = S.CreateBuiltinBinOp(Loc, BO_LAnd, E, CmpSoFar.get()); | ||||
8078 | if (CmpSoFar.isInvalid()) | ||||
8079 | return StmtError(); | ||||
8080 | } | ||||
8081 | if (FinishCmp()) | ||||
8082 | return StmtError(); | ||||
8083 | std::reverse(Stmts.Stmts.begin(), Stmts.Stmts.end()); | ||||
8084 | // If no such index exists, V is true. | ||||
8085 | if (RetVal.isUnset()) | ||||
8086 | RetVal = S.ActOnCXXBoolLiteral(Loc, tok::kw_true); | ||||
8087 | break; | ||||
8088 | } | ||||
8089 | |||||
8090 | case DefaultedComparisonKind::ThreeWay: { | ||||
8091 | // Per C++2a [class.spaceship]p3, as a fallback add: | ||||
8092 | // return static_cast<R>(std::strong_ordering::equal); | ||||
8093 | QualType StrongOrdering = S.CheckComparisonCategoryType( | ||||
8094 | ComparisonCategoryType::StrongOrdering, Loc, | ||||
8095 | Sema::ComparisonCategoryUsage::DefaultedOperator); | ||||
8096 | if (StrongOrdering.isNull()) | ||||
8097 | return StmtError(); | ||||
8098 | VarDecl *EqualVD = S.Context.CompCategories.getInfoForType(StrongOrdering) | ||||
8099 | .getValueInfo(ComparisonCategoryResult::Equal) | ||||
8100 | ->VD; | ||||
8101 | RetVal = getDecl(EqualVD); | ||||
8102 | if (RetVal.isInvalid()) | ||||
8103 | return StmtError(); | ||||
8104 | RetVal = buildStaticCastToR(RetVal.get()); | ||||
8105 | break; | ||||
8106 | } | ||||
8107 | |||||
8108 | case DefaultedComparisonKind::NotEqual: | ||||
8109 | case DefaultedComparisonKind::Relational: | ||||
8110 | RetVal = cast<Expr>(Stmts.Stmts.pop_back_val()); | ||||
8111 | break; | ||||
8112 | } | ||||
8113 | |||||
8114 | // Build the final return statement. | ||||
8115 | if (RetVal.isInvalid()) | ||||
8116 | return StmtError(); | ||||
8117 | StmtResult ReturnStmt = S.BuildReturnStmt(Loc, RetVal.get()); | ||||
8118 | if (ReturnStmt.isInvalid()) | ||||
8119 | return StmtError(); | ||||
8120 | Stmts.Stmts.push_back(ReturnStmt.get()); | ||||
8121 | |||||
8122 | return S.ActOnCompoundStmt(Loc, Loc, Stmts.Stmts, /*IsStmtExpr=*/false); | ||||
8123 | } | ||||
8124 | |||||
8125 | private: | ||||
8126 | ExprResult getDecl(ValueDecl *VD) { | ||||
8127 | return S.BuildDeclarationNameExpr( | ||||
8128 | CXXScopeSpec(), DeclarationNameInfo(VD->getDeclName(), Loc), VD); | ||||
8129 | } | ||||
8130 | |||||
8131 | ExprResult getParam(unsigned I) { | ||||
8132 | ParmVarDecl *PD = FD->getParamDecl(I); | ||||
8133 | return getDecl(PD); | ||||
8134 | } | ||||
8135 | |||||
8136 | ExprPair getCompleteObject() { | ||||
8137 | unsigned Param = 0; | ||||
8138 | ExprResult LHS; | ||||
8139 | if (isa<CXXMethodDecl>(FD)) { | ||||
8140 | // LHS is '*this'. | ||||
8141 | LHS = S.ActOnCXXThis(Loc); | ||||
8142 | if (!LHS.isInvalid()) | ||||
8143 | LHS = S.CreateBuiltinUnaryOp(Loc, UO_Deref, LHS.get()); | ||||
8144 | } else { | ||||
8145 | LHS = getParam(Param++); | ||||
8146 | } | ||||
8147 | ExprResult RHS = getParam(Param++); | ||||
8148 | assert(Param == FD->getNumParams())(static_cast <bool> (Param == FD->getNumParams()) ? void (0) : __assert_fail ("Param == FD->getNumParams()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8148, __extension__ __PRETTY_FUNCTION__)); | ||||
8149 | return {LHS, RHS}; | ||||
8150 | } | ||||
8151 | |||||
8152 | ExprPair getBase(CXXBaseSpecifier *Base) { | ||||
8153 | ExprPair Obj = getCompleteObject(); | ||||
8154 | if (Obj.first.isInvalid() || Obj.second.isInvalid()) | ||||
8155 | return {ExprError(), ExprError()}; | ||||
8156 | CXXCastPath Path = {Base}; | ||||
8157 | return {S.ImpCastExprToType(Obj.first.get(), Base->getType(), | ||||
8158 | CK_DerivedToBase, VK_LValue, &Path), | ||||
8159 | S.ImpCastExprToType(Obj.second.get(), Base->getType(), | ||||
8160 | CK_DerivedToBase, VK_LValue, &Path)}; | ||||
8161 | } | ||||
8162 | |||||
8163 | ExprPair getField(FieldDecl *Field) { | ||||
8164 | ExprPair Obj = getCompleteObject(); | ||||
8165 | if (Obj.first.isInvalid() || Obj.second.isInvalid()) | ||||
8166 | return {ExprError(), ExprError()}; | ||||
8167 | |||||
8168 | DeclAccessPair Found = DeclAccessPair::make(Field, Field->getAccess()); | ||||
8169 | DeclarationNameInfo NameInfo(Field->getDeclName(), Loc); | ||||
8170 | return {S.BuildFieldReferenceExpr(Obj.first.get(), /*IsArrow=*/false, Loc, | ||||
8171 | CXXScopeSpec(), Field, Found, NameInfo), | ||||
8172 | S.BuildFieldReferenceExpr(Obj.second.get(), /*IsArrow=*/false, Loc, | ||||
8173 | CXXScopeSpec(), Field, Found, NameInfo)}; | ||||
8174 | } | ||||
8175 | |||||
8176 | // FIXME: When expanding a subobject, register a note in the code synthesis | ||||
8177 | // stack to say which subobject we're comparing. | ||||
8178 | |||||
8179 | StmtResult buildIfNotCondReturnFalse(ExprResult Cond) { | ||||
8180 | if (Cond.isInvalid()) | ||||
8181 | return StmtError(); | ||||
8182 | |||||
8183 | ExprResult NotCond = S.CreateBuiltinUnaryOp(Loc, UO_LNot, Cond.get()); | ||||
8184 | if (NotCond.isInvalid()) | ||||
8185 | return StmtError(); | ||||
8186 | |||||
8187 | ExprResult False = S.ActOnCXXBoolLiteral(Loc, tok::kw_false); | ||||
8188 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8188, __extension__ __PRETTY_FUNCTION__)); | ||||
8189 | StmtResult ReturnFalse = S.BuildReturnStmt(Loc, False.get()); | ||||
8190 | if (ReturnFalse.isInvalid()) | ||||
8191 | return StmtError(); | ||||
8192 | |||||
8193 | return S.ActOnIfStmt(Loc, false, Loc, nullptr, | ||||
8194 | S.ActOnCondition(nullptr, Loc, NotCond.get(), | ||||
8195 | Sema::ConditionKind::Boolean), | ||||
8196 | Loc, ReturnFalse.get(), SourceLocation(), nullptr); | ||||
8197 | } | ||||
8198 | |||||
8199 | StmtResult visitSubobjectArray(QualType Type, llvm::APInt Size, | ||||
8200 | ExprPair Subobj) { | ||||
8201 | QualType SizeType = S.Context.getSizeType(); | ||||
8202 | Size = Size.zextOrTrunc(S.Context.getTypeSize(SizeType)); | ||||
8203 | |||||
8204 | // Build 'size_t i$n = 0'. | ||||
8205 | IdentifierInfo *IterationVarName = nullptr; | ||||
8206 | { | ||||
8207 | SmallString<8> Str; | ||||
8208 | llvm::raw_svector_ostream OS(Str); | ||||
8209 | OS << "i" << ArrayDepth; | ||||
8210 | IterationVarName = &S.Context.Idents.get(OS.str()); | ||||
8211 | } | ||||
8212 | VarDecl *IterationVar = VarDecl::Create( | ||||
8213 | S.Context, S.CurContext, Loc, Loc, IterationVarName, SizeType, | ||||
8214 | S.Context.getTrivialTypeSourceInfo(SizeType, Loc), SC_None); | ||||
8215 | llvm::APInt Zero(S.Context.getTypeSize(SizeType), 0); | ||||
8216 | IterationVar->setInit( | ||||
8217 | IntegerLiteral::Create(S.Context, Zero, SizeType, Loc)); | ||||
8218 | Stmt *Init = new (S.Context) DeclStmt(DeclGroupRef(IterationVar), Loc, Loc); | ||||
8219 | |||||
8220 | auto IterRef = [&] { | ||||
8221 | ExprResult Ref = S.BuildDeclarationNameExpr( | ||||
8222 | CXXScopeSpec(), DeclarationNameInfo(IterationVarName, Loc), | ||||
8223 | IterationVar); | ||||
8224 | assert(!Ref.isInvalid() && "can't reference our own variable?")(static_cast <bool> (!Ref.isInvalid() && "can't reference our own variable?" ) ? void (0) : __assert_fail ("!Ref.isInvalid() && \"can't reference our own variable?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8224, __extension__ __PRETTY_FUNCTION__)); | ||||
8225 | return Ref.get(); | ||||
8226 | }; | ||||
8227 | |||||
8228 | // Build 'i$n != Size'. | ||||
8229 | ExprResult Cond = S.CreateBuiltinBinOp( | ||||
8230 | Loc, BO_NE, IterRef(), | ||||
8231 | IntegerLiteral::Create(S.Context, Size, SizeType, Loc)); | ||||
8232 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8232, __extension__ __PRETTY_FUNCTION__)); | ||||
8233 | |||||
8234 | // Build '++i$n'. | ||||
8235 | ExprResult Inc = S.CreateBuiltinUnaryOp(Loc, UO_PreInc, IterRef()); | ||||
8236 | assert(!Inc.isInvalid() && "should never fail")(static_cast <bool> (!Inc.isInvalid() && "should never fail" ) ? void (0) : __assert_fail ("!Inc.isInvalid() && \"should never fail\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8236, __extension__ __PRETTY_FUNCTION__)); | ||||
8237 | |||||
8238 | // Build 'a[i$n]' and 'b[i$n]'. | ||||
8239 | auto Index = [&](ExprResult E) { | ||||
8240 | if (E.isInvalid()) | ||||
8241 | return ExprError(); | ||||
8242 | return S.CreateBuiltinArraySubscriptExpr(E.get(), Loc, IterRef(), Loc); | ||||
8243 | }; | ||||
8244 | Subobj.first = Index(Subobj.first); | ||||
8245 | Subobj.second = Index(Subobj.second); | ||||
8246 | |||||
8247 | // Compare the array elements. | ||||
8248 | ++ArrayDepth; | ||||
8249 | StmtResult Substmt = visitSubobject(Type, Subobj); | ||||
8250 | --ArrayDepth; | ||||
8251 | |||||
8252 | if (Substmt.isInvalid()) | ||||
8253 | return StmtError(); | ||||
8254 | |||||
8255 | // For the inner level of an 'operator==', build 'if (!cmp) return false;'. | ||||
8256 | // For outer levels or for an 'operator<=>' we already have a suitable | ||||
8257 | // statement that returns as necessary. | ||||
8258 | if (Expr *ElemCmp = dyn_cast<Expr>(Substmt.get())) { | ||||
8259 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8260, __extension__ __PRETTY_FUNCTION__)) | ||||
8260 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8260, __extension__ __PRETTY_FUNCTION__)); | ||||
8261 | Substmt = buildIfNotCondReturnFalse(ElemCmp); | ||||
8262 | if (Substmt.isInvalid()) | ||||
8263 | return StmtError(); | ||||
8264 | } | ||||
8265 | |||||
8266 | // Build 'for (...) ...' | ||||
8267 | return S.ActOnForStmt(Loc, Loc, Init, | ||||
8268 | S.ActOnCondition(nullptr, Loc, Cond.get(), | ||||
8269 | Sema::ConditionKind::Boolean), | ||||
8270 | S.MakeFullDiscardedValueExpr(Inc.get()), Loc, | ||||
8271 | Substmt.get()); | ||||
8272 | } | ||||
8273 | |||||
8274 | StmtResult visitExpandedSubobject(QualType Type, ExprPair Obj) { | ||||
8275 | if (Obj.first.isInvalid() || Obj.second.isInvalid()) | ||||
8276 | return StmtError(); | ||||
8277 | |||||
8278 | OverloadedOperatorKind OO = FD->getOverloadedOperator(); | ||||
8279 | BinaryOperatorKind Opc = BinaryOperator::getOverloadedOpcode(OO); | ||||
8280 | ExprResult Op; | ||||
8281 | if (Type->isOverloadableType()) | ||||
8282 | Op = S.CreateOverloadedBinOp(Loc, Opc, Fns, Obj.first.get(), | ||||
8283 | Obj.second.get(), /*PerformADL=*/true, | ||||
8284 | /*AllowRewrittenCandidates=*/true, FD); | ||||
8285 | else | ||||
8286 | Op = S.CreateBuiltinBinOp(Loc, Opc, Obj.first.get(), Obj.second.get()); | ||||
8287 | if (Op.isInvalid()) | ||||
8288 | return StmtError(); | ||||
8289 | |||||
8290 | switch (DCK) { | ||||
8291 | case DefaultedComparisonKind::None: | ||||
8292 | llvm_unreachable("not a defaulted comparison")::llvm::llvm_unreachable_internal("not a defaulted comparison" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8292); | ||||
8293 | |||||
8294 | case DefaultedComparisonKind::Equal: | ||||
8295 | // Per C++2a [class.eq]p2, each comparison is individually contextually | ||||
8296 | // converted to bool. | ||||
8297 | Op = S.PerformContextuallyConvertToBool(Op.get()); | ||||
8298 | if (Op.isInvalid()) | ||||
8299 | return StmtError(); | ||||
8300 | return Op.get(); | ||||
8301 | |||||
8302 | case DefaultedComparisonKind::ThreeWay: { | ||||
8303 | // Per C++2a [class.spaceship]p3, form: | ||||
8304 | // if (R cmp = static_cast<R>(op); cmp != 0) | ||||
8305 | // return cmp; | ||||
8306 | QualType R = FD->getReturnType(); | ||||
8307 | Op = buildStaticCastToR(Op.get()); | ||||
8308 | if (Op.isInvalid()) | ||||
8309 | return StmtError(); | ||||
8310 | |||||
8311 | // R cmp = ...; | ||||
8312 | IdentifierInfo *Name = &S.Context.Idents.get("cmp"); | ||||
8313 | VarDecl *VD = | ||||
8314 | VarDecl::Create(S.Context, S.CurContext, Loc, Loc, Name, R, | ||||
8315 | S.Context.getTrivialTypeSourceInfo(R, Loc), SC_None); | ||||
8316 | S.AddInitializerToDecl(VD, Op.get(), /*DirectInit=*/false); | ||||
8317 | Stmt *InitStmt = new (S.Context) DeclStmt(DeclGroupRef(VD), Loc, Loc); | ||||
8318 | |||||
8319 | // cmp != 0 | ||||
8320 | ExprResult VDRef = getDecl(VD); | ||||
8321 | if (VDRef.isInvalid()) | ||||
8322 | return StmtError(); | ||||
8323 | llvm::APInt ZeroVal(S.Context.getIntWidth(S.Context.IntTy), 0); | ||||
8324 | Expr *Zero = | ||||
8325 | IntegerLiteral::Create(S.Context, ZeroVal, S.Context.IntTy, Loc); | ||||
8326 | ExprResult Comp; | ||||
8327 | if (VDRef.get()->getType()->isOverloadableType()) | ||||
8328 | Comp = S.CreateOverloadedBinOp(Loc, BO_NE, Fns, VDRef.get(), Zero, true, | ||||
8329 | true, FD); | ||||
8330 | else | ||||
8331 | Comp = S.CreateBuiltinBinOp(Loc, BO_NE, VDRef.get(), Zero); | ||||
8332 | if (Comp.isInvalid()) | ||||
8333 | return StmtError(); | ||||
8334 | Sema::ConditionResult Cond = S.ActOnCondition( | ||||
8335 | nullptr, Loc, Comp.get(), Sema::ConditionKind::Boolean); | ||||
8336 | if (Cond.isInvalid()) | ||||
8337 | return StmtError(); | ||||
8338 | |||||
8339 | // return cmp; | ||||
8340 | VDRef = getDecl(VD); | ||||
8341 | if (VDRef.isInvalid()) | ||||
8342 | return StmtError(); | ||||
8343 | StmtResult ReturnStmt = S.BuildReturnStmt(Loc, VDRef.get()); | ||||
8344 | if (ReturnStmt.isInvalid()) | ||||
8345 | return StmtError(); | ||||
8346 | |||||
8347 | // if (...) | ||||
8348 | return S.ActOnIfStmt(Loc, /*IsConstexpr=*/false, Loc, InitStmt, Cond, Loc, | ||||
8349 | ReturnStmt.get(), | ||||
8350 | /*ElseLoc=*/SourceLocation(), /*Else=*/nullptr); | ||||
8351 | } | ||||
8352 | |||||
8353 | case DefaultedComparisonKind::NotEqual: | ||||
8354 | case DefaultedComparisonKind::Relational: | ||||
8355 | // C++2a [class.compare.secondary]p2: | ||||
8356 | // Otherwise, the operator function yields x @ y. | ||||
8357 | return Op.get(); | ||||
8358 | } | ||||
8359 | llvm_unreachable("")::llvm::llvm_unreachable_internal("", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8359); | ||||
8360 | } | ||||
8361 | |||||
8362 | /// Build "static_cast<R>(E)". | ||||
8363 | ExprResult buildStaticCastToR(Expr *E) { | ||||
8364 | QualType R = FD->getReturnType(); | ||||
8365 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8365, __extension__ __PRETTY_FUNCTION__)); | ||||
8366 | |||||
8367 | // Don't bother forming a no-op cast in the common case. | ||||
8368 | if (E->isPRValue() && S.Context.hasSameType(E->getType(), R)) | ||||
8369 | return E; | ||||
8370 | return S.BuildCXXNamedCast(Loc, tok::kw_static_cast, | ||||
8371 | S.Context.getTrivialTypeSourceInfo(R, Loc), E, | ||||
8372 | SourceRange(Loc, Loc), SourceRange(Loc, Loc)); | ||||
8373 | } | ||||
8374 | }; | ||||
8375 | } | ||||
8376 | |||||
8377 | /// Perform the unqualified lookups that might be needed to form a defaulted | ||||
8378 | /// comparison function for the given operator. | ||||
8379 | static void lookupOperatorsForDefaultedComparison(Sema &Self, Scope *S, | ||||
8380 | UnresolvedSetImpl &Operators, | ||||
8381 | OverloadedOperatorKind Op) { | ||||
8382 | auto Lookup = [&](OverloadedOperatorKind OO) { | ||||
8383 | Self.LookupOverloadedOperatorName(OO, S, Operators); | ||||
8384 | }; | ||||
8385 | |||||
8386 | // Every defaulted operator looks up itself. | ||||
8387 | Lookup(Op); | ||||
8388 | // ... and the rewritten form of itself, if any. | ||||
8389 | if (OverloadedOperatorKind ExtraOp = getRewrittenOverloadedOperator(Op)) | ||||
8390 | Lookup(ExtraOp); | ||||
8391 | |||||
8392 | // For 'operator<=>', we also form a 'cmp != 0' expression, and might | ||||
8393 | // synthesize a three-way comparison from '<' and '=='. In a dependent | ||||
8394 | // context, we also need to look up '==' in case we implicitly declare a | ||||
8395 | // defaulted 'operator=='. | ||||
8396 | if (Op == OO_Spaceship) { | ||||
8397 | Lookup(OO_ExclaimEqual); | ||||
8398 | Lookup(OO_Less); | ||||
8399 | Lookup(OO_EqualEqual); | ||||
8400 | } | ||||
8401 | } | ||||
8402 | |||||
8403 | bool Sema::CheckExplicitlyDefaultedComparison(Scope *S, FunctionDecl *FD, | ||||
8404 | DefaultedComparisonKind DCK) { | ||||
8405 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8405, __extension__ __PRETTY_FUNCTION__)); | ||||
8406 | |||||
8407 | CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(FD->getLexicalDeclContext()); | ||||
8408 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8408, __extension__ __PRETTY_FUNCTION__)); | ||||
8409 | |||||
8410 | // Perform any unqualified lookups we're going to need to default this | ||||
8411 | // function. | ||||
8412 | if (S) { | ||||
8413 | UnresolvedSet<32> Operators; | ||||
8414 | lookupOperatorsForDefaultedComparison(*this, S, Operators, | ||||
8415 | FD->getOverloadedOperator()); | ||||
8416 | FD->setDefaultedFunctionInfo(FunctionDecl::DefaultedFunctionInfo::Create( | ||||
8417 | Context, Operators.pairs())); | ||||
8418 | } | ||||
8419 | |||||
8420 | // C++2a [class.compare.default]p1: | ||||
8421 | // A defaulted comparison operator function for some class C shall be a | ||||
8422 | // non-template function declared in the member-specification of C that is | ||||
8423 | // -- a non-static const member of C having one parameter of type | ||||
8424 | // const C&, or | ||||
8425 | // -- a friend of C having two parameters of type const C& or two | ||||
8426 | // parameters of type C. | ||||
8427 | QualType ExpectedParmType1 = Context.getRecordType(RD); | ||||
8428 | QualType ExpectedParmType2 = | ||||
8429 | Context.getLValueReferenceType(ExpectedParmType1.withConst()); | ||||
8430 | if (isa<CXXMethodDecl>(FD)) | ||||
8431 | ExpectedParmType1 = ExpectedParmType2; | ||||
8432 | for (const ParmVarDecl *Param : FD->parameters()) { | ||||
8433 | if (!Param->getType()->isDependentType() && | ||||
8434 | !Context.hasSameType(Param->getType(), ExpectedParmType1) && | ||||
8435 | !Context.hasSameType(Param->getType(), ExpectedParmType2)) { | ||||
8436 | // Don't diagnose an implicit 'operator=='; we will have diagnosed the | ||||
8437 | // corresponding defaulted 'operator<=>' already. | ||||
8438 | if (!FD->isImplicit()) { | ||||
8439 | Diag(FD->getLocation(), diag::err_defaulted_comparison_param) | ||||
8440 | << (int)DCK << Param->getType() << ExpectedParmType1 | ||||
8441 | << !isa<CXXMethodDecl>(FD) | ||||
8442 | << ExpectedParmType2 << Param->getSourceRange(); | ||||
8443 | } | ||||
8444 | return true; | ||||
8445 | } | ||||
8446 | } | ||||
8447 | if (FD->getNumParams() == 2 && | ||||
8448 | !Context.hasSameType(FD->getParamDecl(0)->getType(), | ||||
8449 | FD->getParamDecl(1)->getType())) { | ||||
8450 | if (!FD->isImplicit()) { | ||||
8451 | Diag(FD->getLocation(), diag::err_defaulted_comparison_param_mismatch) | ||||
8452 | << (int)DCK | ||||
8453 | << FD->getParamDecl(0)->getType() | ||||
8454 | << FD->getParamDecl(0)->getSourceRange() | ||||
8455 | << FD->getParamDecl(1)->getType() | ||||
8456 | << FD->getParamDecl(1)->getSourceRange(); | ||||
8457 | } | ||||
8458 | return true; | ||||
8459 | } | ||||
8460 | |||||
8461 | // ... non-static const member ... | ||||
8462 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||
8463 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8463, __extension__ __PRETTY_FUNCTION__)); | ||||
8464 | if (!MD->isConst()) { | ||||
8465 | SourceLocation InsertLoc; | ||||
8466 | if (FunctionTypeLoc Loc = MD->getFunctionTypeLoc()) | ||||
8467 | InsertLoc = getLocForEndOfToken(Loc.getRParenLoc()); | ||||
8468 | // Don't diagnose an implicit 'operator=='; we will have diagnosed the | ||||
8469 | // corresponding defaulted 'operator<=>' already. | ||||
8470 | if (!MD->isImplicit()) { | ||||
8471 | Diag(MD->getLocation(), diag::err_defaulted_comparison_non_const) | ||||
8472 | << (int)DCK << FixItHint::CreateInsertion(InsertLoc, " const"); | ||||
8473 | } | ||||
8474 | |||||
8475 | // Add the 'const' to the type to recover. | ||||
8476 | const auto *FPT = MD->getType()->castAs<FunctionProtoType>(); | ||||
8477 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||
8478 | EPI.TypeQuals.addConst(); | ||||
8479 | MD->setType(Context.getFunctionType(FPT->getReturnType(), | ||||
8480 | FPT->getParamTypes(), EPI)); | ||||
8481 | } | ||||
8482 | } else { | ||||
8483 | // A non-member function declared in a class must be a friend. | ||||
8484 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8484, __extension__ __PRETTY_FUNCTION__)); | ||||
8485 | } | ||||
8486 | |||||
8487 | // C++2a [class.eq]p1, [class.rel]p1: | ||||
8488 | // A [defaulted comparison other than <=>] shall have a declared return | ||||
8489 | // type bool. | ||||
8490 | if (DCK != DefaultedComparisonKind::ThreeWay && | ||||
8491 | !FD->getDeclaredReturnType()->isDependentType() && | ||||
8492 | !Context.hasSameType(FD->getDeclaredReturnType(), Context.BoolTy)) { | ||||
8493 | Diag(FD->getLocation(), diag::err_defaulted_comparison_return_type_not_bool) | ||||
8494 | << (int)DCK << FD->getDeclaredReturnType() << Context.BoolTy | ||||
8495 | << FD->getReturnTypeSourceRange(); | ||||
8496 | return true; | ||||
8497 | } | ||||
8498 | // C++2a [class.spaceship]p2 [P2002R0]: | ||||
8499 | // Let R be the declared return type [...]. If R is auto, [...]. Otherwise, | ||||
8500 | // R shall not contain a placeholder type. | ||||
8501 | if (DCK == DefaultedComparisonKind::ThreeWay && | ||||
8502 | FD->getDeclaredReturnType()->getContainedDeducedType() && | ||||
8503 | !Context.hasSameType(FD->getDeclaredReturnType(), | ||||
8504 | Context.getAutoDeductType())) { | ||||
8505 | Diag(FD->getLocation(), | ||||
8506 | diag::err_defaulted_comparison_deduced_return_type_not_auto) | ||||
8507 | << (int)DCK << FD->getDeclaredReturnType() << Context.AutoDeductTy | ||||
8508 | << FD->getReturnTypeSourceRange(); | ||||
8509 | return true; | ||||
8510 | } | ||||
8511 | |||||
8512 | // For a defaulted function in a dependent class, defer all remaining checks | ||||
8513 | // until instantiation. | ||||
8514 | if (RD->isDependentType()) | ||||
8515 | return false; | ||||
8516 | |||||
8517 | // Determine whether the function should be defined as deleted. | ||||
8518 | DefaultedComparisonInfo Info = | ||||
8519 | DefaultedComparisonAnalyzer(*this, RD, FD, DCK).visit(); | ||||
8520 | |||||
8521 | bool First = FD == FD->getCanonicalDecl(); | ||||
8522 | |||||
8523 | // If we want to delete the function, then do so; there's nothing else to | ||||
8524 | // check in that case. | ||||
8525 | if (Info.Deleted) { | ||||
8526 | if (!First) { | ||||
8527 | // C++11 [dcl.fct.def.default]p4: | ||||
8528 | // [For a] user-provided explicitly-defaulted function [...] if such a | ||||
8529 | // function is implicitly defined as deleted, the program is ill-formed. | ||||
8530 | // | ||||
8531 | // This is really just a consequence of the general rule that you can | ||||
8532 | // only delete a function on its first declaration. | ||||
8533 | Diag(FD->getLocation(), diag::err_non_first_default_compare_deletes) | ||||
8534 | << FD->isImplicit() << (int)DCK; | ||||
8535 | DefaultedComparisonAnalyzer(*this, RD, FD, DCK, | ||||
8536 | DefaultedComparisonAnalyzer::ExplainDeleted) | ||||
8537 | .visit(); | ||||
8538 | return true; | ||||
8539 | } | ||||
8540 | |||||
8541 | SetDeclDeleted(FD, FD->getLocation()); | ||||
8542 | if (!inTemplateInstantiation() && !FD->isImplicit()) { | ||||
8543 | Diag(FD->getLocation(), diag::warn_defaulted_comparison_deleted) | ||||
8544 | << (int)DCK; | ||||
8545 | DefaultedComparisonAnalyzer(*this, RD, FD, DCK, | ||||
8546 | DefaultedComparisonAnalyzer::ExplainDeleted) | ||||
8547 | .visit(); | ||||
8548 | } | ||||
8549 | return false; | ||||
8550 | } | ||||
8551 | |||||
8552 | // C++2a [class.spaceship]p2: | ||||
8553 | // The return type is deduced as the common comparison type of R0, R1, ... | ||||
8554 | if (DCK == DefaultedComparisonKind::ThreeWay && | ||||
8555 | FD->getDeclaredReturnType()->isUndeducedAutoType()) { | ||||
8556 | SourceLocation RetLoc = FD->getReturnTypeSourceRange().getBegin(); | ||||
8557 | if (RetLoc.isInvalid()) | ||||
8558 | RetLoc = FD->getBeginLoc(); | ||||
8559 | // FIXME: Should we really care whether we have the complete type and the | ||||
8560 | // 'enumerator' constants here? A forward declaration seems sufficient. | ||||
8561 | QualType Cat = CheckComparisonCategoryType( | ||||
8562 | Info.Category, RetLoc, ComparisonCategoryUsage::DefaultedOperator); | ||||
8563 | if (Cat.isNull()) | ||||
8564 | return true; | ||||
8565 | Context.adjustDeducedFunctionResultType( | ||||
8566 | FD, SubstAutoType(FD->getDeclaredReturnType(), Cat)); | ||||
8567 | } | ||||
8568 | |||||
8569 | // C++2a [dcl.fct.def.default]p3 [P2002R0]: | ||||
8570 | // An explicitly-defaulted function that is not defined as deleted may be | ||||
8571 | // declared constexpr or consteval only if it is constexpr-compatible. | ||||
8572 | // C++2a [class.compare.default]p3 [P2002R0]: | ||||
8573 | // A defaulted comparison function is constexpr-compatible if it satisfies | ||||
8574 | // the requirements for a constexpr function [...] | ||||
8575 | // The only relevant requirements are that the parameter and return types are | ||||
8576 | // literal types. The remaining conditions are checked by the analyzer. | ||||
8577 | if (FD->isConstexpr()) { | ||||
8578 | if (CheckConstexprReturnType(*this, FD, CheckConstexprKind::Diagnose) && | ||||
8579 | CheckConstexprParameterTypes(*this, FD, CheckConstexprKind::Diagnose) && | ||||
8580 | !Info.Constexpr) { | ||||
8581 | Diag(FD->getBeginLoc(), | ||||
8582 | diag::err_incorrect_defaulted_comparison_constexpr) | ||||
8583 | << FD->isImplicit() << (int)DCK << FD->isConsteval(); | ||||
8584 | DefaultedComparisonAnalyzer(*this, RD, FD, DCK, | ||||
8585 | DefaultedComparisonAnalyzer::ExplainConstexpr) | ||||
8586 | .visit(); | ||||
8587 | } | ||||
8588 | } | ||||
8589 | |||||
8590 | // C++2a [dcl.fct.def.default]p3 [P2002R0]: | ||||
8591 | // If a constexpr-compatible function is explicitly defaulted on its first | ||||
8592 | // declaration, it is implicitly considered to be constexpr. | ||||
8593 | // FIXME: Only applying this to the first declaration seems problematic, as | ||||
8594 | // simple reorderings can affect the meaning of the program. | ||||
8595 | if (First && !FD->isConstexpr() && Info.Constexpr) | ||||
8596 | FD->setConstexprKind(ConstexprSpecKind::Constexpr); | ||||
8597 | |||||
8598 | // C++2a [except.spec]p3: | ||||
8599 | // If a declaration of a function does not have a noexcept-specifier | ||||
8600 | // [and] is defaulted on its first declaration, [...] the exception | ||||
8601 | // specification is as specified below | ||||
8602 | if (FD->getExceptionSpecType() == EST_None) { | ||||
8603 | auto *FPT = FD->getType()->castAs<FunctionProtoType>(); | ||||
8604 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||
8605 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||
8606 | EPI.ExceptionSpec.SourceDecl = FD; | ||||
8607 | FD->setType(Context.getFunctionType(FPT->getReturnType(), | ||||
8608 | FPT->getParamTypes(), EPI)); | ||||
8609 | } | ||||
8610 | |||||
8611 | return false; | ||||
8612 | } | ||||
8613 | |||||
8614 | void Sema::DeclareImplicitEqualityComparison(CXXRecordDecl *RD, | ||||
8615 | FunctionDecl *Spaceship) { | ||||
8616 | Sema::CodeSynthesisContext Ctx; | ||||
8617 | Ctx.Kind = Sema::CodeSynthesisContext::DeclaringImplicitEqualityComparison; | ||||
8618 | Ctx.PointOfInstantiation = Spaceship->getEndLoc(); | ||||
8619 | Ctx.Entity = Spaceship; | ||||
8620 | pushCodeSynthesisContext(Ctx); | ||||
8621 | |||||
8622 | if (FunctionDecl *EqualEqual = SubstSpaceshipAsEqualEqual(RD, Spaceship)) | ||||
8623 | EqualEqual->setImplicit(); | ||||
8624 | |||||
8625 | popCodeSynthesisContext(); | ||||
8626 | } | ||||
8627 | |||||
8628 | void Sema::DefineDefaultedComparison(SourceLocation UseLoc, FunctionDecl *FD, | ||||
8629 | DefaultedComparisonKind DCK) { | ||||
8630 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8631, __extension__ __PRETTY_FUNCTION__)) | ||||
8631 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8631, __extension__ __PRETTY_FUNCTION__)); | ||||
8632 | if (FD->willHaveBody() || FD->isInvalidDecl()) | ||||
8633 | return; | ||||
8634 | |||||
8635 | SynthesizedFunctionScope Scope(*this, FD); | ||||
8636 | |||||
8637 | // Add a context note for diagnostics produced after this point. | ||||
8638 | Scope.addContextNote(UseLoc); | ||||
8639 | |||||
8640 | { | ||||
8641 | // Build and set up the function body. | ||||
8642 | CXXRecordDecl *RD = cast<CXXRecordDecl>(FD->getLexicalParent()); | ||||
8643 | SourceLocation BodyLoc = | ||||
8644 | FD->getEndLoc().isValid() ? FD->getEndLoc() : FD->getLocation(); | ||||
8645 | StmtResult Body = | ||||
8646 | DefaultedComparisonSynthesizer(*this, RD, FD, DCK, BodyLoc).build(); | ||||
8647 | if (Body.isInvalid()) { | ||||
8648 | FD->setInvalidDecl(); | ||||
8649 | return; | ||||
8650 | } | ||||
8651 | FD->setBody(Body.get()); | ||||
8652 | FD->markUsed(Context); | ||||
8653 | } | ||||
8654 | |||||
8655 | // The exception specification is needed because we are defining the | ||||
8656 | // function. Note that this will reuse the body we just built. | ||||
8657 | ResolveExceptionSpec(UseLoc, FD->getType()->castAs<FunctionProtoType>()); | ||||
8658 | |||||
8659 | if (ASTMutationListener *L = getASTMutationListener()) | ||||
8660 | L->CompletedImplicitDefinition(FD); | ||||
8661 | } | ||||
8662 | |||||
8663 | static Sema::ImplicitExceptionSpecification | ||||
8664 | ComputeDefaultedComparisonExceptionSpec(Sema &S, SourceLocation Loc, | ||||
8665 | FunctionDecl *FD, | ||||
8666 | Sema::DefaultedComparisonKind DCK) { | ||||
8667 | ComputingExceptionSpec CES(S, FD, Loc); | ||||
8668 | Sema::ImplicitExceptionSpecification ExceptSpec(S); | ||||
8669 | |||||
8670 | if (FD->isInvalidDecl()) | ||||
8671 | return ExceptSpec; | ||||
8672 | |||||
8673 | // The common case is that we just defined the comparison function. In that | ||||
8674 | // case, just look at whether the body can throw. | ||||
8675 | if (FD->hasBody()) { | ||||
8676 | ExceptSpec.CalledStmt(FD->getBody()); | ||||
8677 | } else { | ||||
8678 | // Otherwise, build a body so we can check it. This should ideally only | ||||
8679 | // happen when we're not actually marking the function referenced. (This is | ||||
8680 | // only really important for efficiency: we don't want to build and throw | ||||
8681 | // away bodies for comparison functions more than we strictly need to.) | ||||
8682 | |||||
8683 | // Pretend to synthesize the function body in an unevaluated context. | ||||
8684 | // Note that we can't actually just go ahead and define the function here: | ||||
8685 | // we are not permitted to mark its callees as referenced. | ||||
8686 | Sema::SynthesizedFunctionScope Scope(S, FD); | ||||
8687 | EnterExpressionEvaluationContext Context( | ||||
8688 | S, Sema::ExpressionEvaluationContext::Unevaluated); | ||||
8689 | |||||
8690 | CXXRecordDecl *RD = cast<CXXRecordDecl>(FD->getLexicalParent()); | ||||
8691 | SourceLocation BodyLoc = | ||||
8692 | FD->getEndLoc().isValid() ? FD->getEndLoc() : FD->getLocation(); | ||||
8693 | StmtResult Body = | ||||
8694 | DefaultedComparisonSynthesizer(S, RD, FD, DCK, BodyLoc).build(); | ||||
8695 | if (!Body.isInvalid()) | ||||
8696 | ExceptSpec.CalledStmt(Body.get()); | ||||
8697 | |||||
8698 | // FIXME: Can we hold onto this body and just transform it to potentially | ||||
8699 | // evaluated when we're asked to define the function rather than rebuilding | ||||
8700 | // it? Either that, or we should only build the bits of the body that we | ||||
8701 | // need (the expressions, not the statements). | ||||
8702 | } | ||||
8703 | |||||
8704 | return ExceptSpec; | ||||
8705 | } | ||||
8706 | |||||
8707 | void Sema::CheckDelayedMemberExceptionSpecs() { | ||||
8708 | decltype(DelayedOverridingExceptionSpecChecks) Overriding; | ||||
8709 | decltype(DelayedEquivalentExceptionSpecChecks) Equivalent; | ||||
8710 | |||||
8711 | std::swap(Overriding, DelayedOverridingExceptionSpecChecks); | ||||
8712 | std::swap(Equivalent, DelayedEquivalentExceptionSpecChecks); | ||||
8713 | |||||
8714 | // Perform any deferred checking of exception specifications for virtual | ||||
8715 | // destructors. | ||||
8716 | for (auto &Check : Overriding) | ||||
8717 | CheckOverridingFunctionExceptionSpec(Check.first, Check.second); | ||||
8718 | |||||
8719 | // Perform any deferred checking of exception specifications for befriended | ||||
8720 | // special members. | ||||
8721 | for (auto &Check : Equivalent) | ||||
8722 | CheckEquivalentExceptionSpec(Check.second, Check.first); | ||||
8723 | } | ||||
8724 | |||||
8725 | namespace { | ||||
8726 | /// CRTP base class for visiting operations performed by a special member | ||||
8727 | /// function (or inherited constructor). | ||||
8728 | template<typename Derived> | ||||
8729 | struct SpecialMemberVisitor { | ||||
8730 | Sema &S; | ||||
8731 | CXXMethodDecl *MD; | ||||
8732 | Sema::CXXSpecialMember CSM; | ||||
8733 | Sema::InheritedConstructorInfo *ICI; | ||||
8734 | |||||
8735 | // Properties of the special member, computed for convenience. | ||||
8736 | bool IsConstructor = false, IsAssignment = false, ConstArg = false; | ||||
8737 | |||||
8738 | SpecialMemberVisitor(Sema &S, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||
8739 | Sema::InheritedConstructorInfo *ICI) | ||||
8740 | : S(S), MD(MD), CSM(CSM), ICI(ICI) { | ||||
8741 | switch (CSM) { | ||||
8742 | case Sema::CXXDefaultConstructor: | ||||
8743 | case Sema::CXXCopyConstructor: | ||||
8744 | case Sema::CXXMoveConstructor: | ||||
8745 | IsConstructor = true; | ||||
8746 | break; | ||||
8747 | case Sema::CXXCopyAssignment: | ||||
8748 | case Sema::CXXMoveAssignment: | ||||
8749 | IsAssignment = true; | ||||
8750 | break; | ||||
8751 | case Sema::CXXDestructor: | ||||
8752 | break; | ||||
8753 | case Sema::CXXInvalid: | ||||
8754 | llvm_unreachable("invalid special member kind")::llvm::llvm_unreachable_internal("invalid special member kind" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8754); | ||||
8755 | } | ||||
8756 | |||||
8757 | if (MD->getNumParams()) { | ||||
8758 | if (const ReferenceType *RT = | ||||
8759 | MD->getParamDecl(0)->getType()->getAs<ReferenceType>()) | ||||
8760 | ConstArg = RT->getPointeeType().isConstQualified(); | ||||
8761 | } | ||||
8762 | } | ||||
8763 | |||||
8764 | Derived &getDerived() { return static_cast<Derived&>(*this); } | ||||
8765 | |||||
8766 | /// Is this a "move" special member? | ||||
8767 | bool isMove() const { | ||||
8768 | return CSM == Sema::CXXMoveConstructor || CSM == Sema::CXXMoveAssignment; | ||||
8769 | } | ||||
8770 | |||||
8771 | /// Look up the corresponding special member in the given class. | ||||
8772 | Sema::SpecialMemberOverloadResult lookupIn(CXXRecordDecl *Class, | ||||
8773 | unsigned Quals, bool IsMutable) { | ||||
8774 | return lookupCallFromSpecialMember(S, Class, CSM, Quals, | ||||
8775 | ConstArg && !IsMutable); | ||||
8776 | } | ||||
8777 | |||||
8778 | /// Look up the constructor for the specified base class to see if it's | ||||
8779 | /// overridden due to this being an inherited constructor. | ||||
8780 | Sema::SpecialMemberOverloadResult lookupInheritedCtor(CXXRecordDecl *Class) { | ||||
8781 | if (!ICI) | ||||
8782 | return {}; | ||||
8783 | assert(CSM == Sema::CXXDefaultConstructor)(static_cast <bool> (CSM == Sema::CXXDefaultConstructor ) ? void (0) : __assert_fail ("CSM == Sema::CXXDefaultConstructor" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 8783, __extension__ __PRETTY_FUNCTION__)); | ||||
8784 | auto *BaseCtor = | ||||
8785 | cast<CXXConstructorDecl>(MD)->getInheritedConstructor().getConstructor(); | ||||
8786 | if (auto *MD = ICI->findConstructorForBase(Class, BaseCtor).first) | ||||
8787 | return MD; | ||||
8788 | return {}; | ||||
8789 | } | ||||
8790 | |||||
8791 | /// A base or member subobject. | ||||
8792 | typedef llvm::PointerUnion<CXXBaseSpecifier*, FieldDecl*> Subobject; | ||||
8793 | |||||
8794 | /// Get the location to use for a subobject in diagnostics. | ||||
8795 | static SourceLocation getSubobjectLoc(Subobject Subobj) { | ||||
8796 | // FIXME: For an indirect virtual base, the direct base leading to | ||||
8797 | // the indirect virtual base would be a more useful choice. | ||||
8798 | if (auto *B = Subobj.dyn_cast<CXXBaseSpecifier*>()) | ||||
8799 | return B->getBaseTypeLoc(); | ||||
8800 | else | ||||
8801 | return Subobj.get<FieldDecl*>()->getLocation(); | ||||
8802 | } | ||||
8803 | |||||
8804 | enum BasesToVisit { | ||||
8805 | /// Visit all non-virtual (direct) bases. | ||||
8806 | VisitNonVirtualBases, | ||||
8807 | /// Visit all direct bases, virtual or not. | ||||
8808 | VisitDirectBases, | ||||
8809 | /// Visit all non-virtual bases, and all virtual bases if the class | ||||
8810 | /// is not abstract. | ||||
8811 | VisitPotentiallyConstructedBases, | ||||
8812 | /// Visit all direct or virtual bases. | ||||
8813 | VisitAllBases | ||||
8814 | }; | ||||
8815 | |||||
8816 | // Visit the bases and members of the class. | ||||
8817 | bool visit(BasesToVisit Bases) { | ||||
8818 | CXXRecordDecl *RD = MD->getParent(); | ||||
8819 | |||||
8820 | if (Bases == VisitPotentiallyConstructedBases) | ||||
8821 | Bases = RD->isAbstract() ? VisitNonVirtualBases : VisitAllBases; | ||||
8822 | |||||
8823 | for (auto &B : RD->bases()) | ||||
8824 | if ((Bases == VisitDirectBases || !B.isVirtual()) && | ||||
8825 | getDerived().visitBase(&B)) | ||||
8826 | return true; | ||||
8827 | |||||
8828 | if (Bases == VisitAllBases) | ||||
8829 | for (auto &B : RD->vbases()) | ||||
8830 | if (getDerived().visitBase(&B)) | ||||
8831 | return true; | ||||
8832 | |||||
8833 | for (auto *F : RD->fields()) | ||||
8834 | if (!F->isInvalidDecl() && !F->isUnnamedBitfield() && | ||||
8835 | getDerived().visitField(F)) | ||||
8836 | return true; | ||||
8837 | |||||
8838 | return false; | ||||
8839 | } | ||||
8840 | }; | ||||
8841 | } | ||||
8842 | |||||
8843 | namespace { | ||||
8844 | struct SpecialMemberDeletionInfo | ||||
8845 | : SpecialMemberVisitor<SpecialMemberDeletionInfo> { | ||||
8846 | bool Diagnose; | ||||
8847 | |||||
8848 | SourceLocation Loc; | ||||
8849 | |||||
8850 | bool AllFieldsAreConst; | ||||
8851 | |||||
8852 | SpecialMemberDeletionInfo(Sema &S, CXXMethodDecl *MD, | ||||
8853 | Sema::CXXSpecialMember CSM, | ||||
8854 | Sema::InheritedConstructorInfo *ICI, bool Diagnose) | ||||
8855 | : SpecialMemberVisitor(S, MD, CSM, ICI), Diagnose(Diagnose), | ||||
8856 | Loc(MD->getLocation()), AllFieldsAreConst(true) {} | ||||
8857 | |||||
8858 | bool inUnion() const { return MD->getParent()->isUnion(); } | ||||
8859 | |||||
8860 | Sema::CXXSpecialMember getEffectiveCSM() { | ||||
8861 | return ICI ? Sema::CXXInvalid : CSM; | ||||
8862 | } | ||||
8863 | |||||
8864 | bool shouldDeleteForVariantObjCPtrMember(FieldDecl *FD, QualType FieldType); | ||||
8865 | |||||
8866 | bool visitBase(CXXBaseSpecifier *Base) { return shouldDeleteForBase(Base); } | ||||
8867 | bool visitField(FieldDecl *Field) { return shouldDeleteForField(Field); } | ||||
8868 | |||||
8869 | bool shouldDeleteForBase(CXXBaseSpecifier *Base); | ||||
8870 | bool shouldDeleteForField(FieldDecl *FD); | ||||
8871 | bool shouldDeleteForAllConstMembers(); | ||||
8872 | |||||
8873 | bool shouldDeleteForClassSubobject(CXXRecordDecl *Class, Subobject Subobj, | ||||
8874 | unsigned Quals); | ||||
8875 | bool shouldDeleteForSubobjectCall(Subobject Subobj, | ||||
8876 | Sema::SpecialMemberOverloadResult SMOR, | ||||
8877 | bool IsDtorCallInCtor); | ||||
8878 | |||||
8879 | bool isAccessible(Subobject Subobj, CXXMethodDecl *D); | ||||
8880 | }; | ||||
8881 | } | ||||
8882 | |||||
8883 | /// Is the given special member inaccessible when used on the given | ||||
8884 | /// sub-object. | ||||
8885 | bool SpecialMemberDeletionInfo::isAccessible(Subobject Subobj, | ||||
8886 | CXXMethodDecl *target) { | ||||
8887 | /// If we're operating on a base class, the object type is the | ||||
8888 | /// type of this special member. | ||||
8889 | QualType objectTy; | ||||
8890 | AccessSpecifier access = target->getAccess(); | ||||
8891 | if (CXXBaseSpecifier *base = Subobj.dyn_cast<CXXBaseSpecifier*>()) { | ||||
8892 | objectTy = S.Context.getTypeDeclType(MD->getParent()); | ||||
8893 | access = CXXRecordDecl::MergeAccess(base->getAccessSpecifier(), access); | ||||
8894 | |||||
8895 | // If we're operating on a field, the object type is the type of the field. | ||||
8896 | } else { | ||||
8897 | objectTy = S.Context.getTypeDeclType(target->getParent()); | ||||
8898 | } | ||||
8899 | |||||
8900 | return S.isMemberAccessibleForDeletion( | ||||
8901 | target->getParent(), DeclAccessPair::make(target, access), objectTy); | ||||
8902 | } | ||||
8903 | |||||
8904 | /// Check whether we should delete a special member due to the implicit | ||||
8905 | /// definition containing a call to a special member of a subobject. | ||||
8906 | bool SpecialMemberDeletionInfo::shouldDeleteForSubobjectCall( | ||||
8907 | Subobject Subobj, Sema::SpecialMemberOverloadResult SMOR, | ||||
8908 | bool IsDtorCallInCtor) { | ||||
8909 | CXXMethodDecl *Decl = SMOR.getMethod(); | ||||
8910 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||
8911 | |||||
8912 | int DiagKind = -1; | ||||
8913 | |||||
8914 | if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted) | ||||
8915 | DiagKind = !Decl ? 0 : 1; | ||||
8916 | else if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous) | ||||
8917 | DiagKind = 2; | ||||
8918 | else if (!isAccessible(Subobj, Decl)) | ||||
8919 | DiagKind = 3; | ||||
8920 | else if (!IsDtorCallInCtor && Field && Field->getParent()->isUnion() && | ||||
8921 | !Decl->isTrivial()) { | ||||
8922 | // A member of a union must have a trivial corresponding special member. | ||||
8923 | // As a weird special case, a destructor call from a union's constructor | ||||
8924 | // must be accessible and non-deleted, but need not be trivial. Such a | ||||
8925 | // destructor is never actually called, but is semantically checked as | ||||
8926 | // if it were. | ||||
8927 | DiagKind = 4; | ||||
8928 | } | ||||
8929 | |||||
8930 | if (DiagKind == -1) | ||||
8931 | return false; | ||||
8932 | |||||
8933 | if (Diagnose) { | ||||
8934 | if (Field) { | ||||
8935 | S.Diag(Field->getLocation(), | ||||
8936 | diag::note_deleted_special_member_class_subobject) | ||||
8937 | << getEffectiveCSM() << MD->getParent() << /*IsField*/true | ||||
8938 | << Field << DiagKind << IsDtorCallInCtor << /*IsObjCPtr*/false; | ||||
8939 | } else { | ||||
8940 | CXXBaseSpecifier *Base = Subobj.get<CXXBaseSpecifier*>(); | ||||
8941 | S.Diag(Base->getBeginLoc(), | ||||
8942 | diag::note_deleted_special_member_class_subobject) | ||||
8943 | << getEffectiveCSM() << MD->getParent() << /*IsField*/ false | ||||
8944 | << Base->getType() << DiagKind << IsDtorCallInCtor | ||||
8945 | << /*IsObjCPtr*/false; | ||||
8946 | } | ||||
8947 | |||||
8948 | if (DiagKind == 1) | ||||
8949 | S.NoteDeletedFunction(Decl); | ||||
8950 | // FIXME: Explain inaccessibility if DiagKind == 3. | ||||
8951 | } | ||||
8952 | |||||
8953 | return true; | ||||
8954 | } | ||||
8955 | |||||
8956 | /// Check whether we should delete a special member function due to having a | ||||
8957 | /// direct or virtual base class or non-static data member of class type M. | ||||
8958 | bool SpecialMemberDeletionInfo::shouldDeleteForClassSubobject( | ||||
8959 | CXXRecordDecl *Class, Subobject Subobj, unsigned Quals) { | ||||
8960 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||
8961 | bool IsMutable = Field && Field->isMutable(); | ||||
8962 | |||||
8963 | // C++11 [class.ctor]p5: | ||||
8964 | // -- any direct or virtual base class, or non-static data member with no | ||||
8965 | // brace-or-equal-initializer, has class type M (or array thereof) and | ||||
8966 | // either M has no default constructor or overload resolution as applied | ||||
8967 | // to M's default constructor results in an ambiguity or in a function | ||||
8968 | // that is deleted or inaccessible | ||||
8969 | // C++11 [class.copy]p11, C++11 [class.copy]p23: | ||||
8970 | // -- a direct or virtual base class B that cannot be copied/moved because | ||||
8971 | // overload resolution, as applied to B's corresponding special member, | ||||
8972 | // results in an ambiguity or a function that is deleted or inaccessible | ||||
8973 | // from the defaulted special member | ||||
8974 | // C++11 [class.dtor]p5: | ||||
8975 | // -- any direct or virtual base class [...] has a type with a destructor | ||||
8976 | // that is deleted or inaccessible | ||||
8977 | if (!(CSM == Sema::CXXDefaultConstructor && | ||||
8978 | Field && Field->hasInClassInitializer()) && | ||||
8979 | shouldDeleteForSubobjectCall(Subobj, lookupIn(Class, Quals, IsMutable), | ||||
8980 | false)) | ||||
8981 | return true; | ||||
8982 | |||||
8983 | // C++11 [class.ctor]p5, C++11 [class.copy]p11: | ||||
8984 | // -- any direct or virtual base class or non-static data member has a | ||||
8985 | // type with a destructor that is deleted or inaccessible | ||||
8986 | if (IsConstructor) { | ||||
8987 | Sema::SpecialMemberOverloadResult SMOR = | ||||
8988 | S.LookupSpecialMember(Class, Sema::CXXDestructor, | ||||
8989 | false, false, false, false, false); | ||||
8990 | if (shouldDeleteForSubobjectCall(Subobj, SMOR, true)) | ||||
8991 | return true; | ||||
8992 | } | ||||
8993 | |||||
8994 | return false; | ||||
8995 | } | ||||
8996 | |||||
8997 | bool SpecialMemberDeletionInfo::shouldDeleteForVariantObjCPtrMember( | ||||
8998 | FieldDecl *FD, QualType FieldType) { | ||||
8999 | // The defaulted special functions are defined as deleted if this is a variant | ||||
9000 | // member with a non-trivial ownership type, e.g., ObjC __strong or __weak | ||||
9001 | // type under ARC. | ||||
9002 | if (!FieldType.hasNonTrivialObjCLifetime()) | ||||
9003 | return false; | ||||
9004 | |||||
9005 | // Don't make the defaulted default constructor defined as deleted if the | ||||
9006 | // member has an in-class initializer. | ||||
9007 | if (CSM == Sema::CXXDefaultConstructor && FD->hasInClassInitializer()) | ||||
9008 | return false; | ||||
9009 | |||||
9010 | if (Diagnose) { | ||||
9011 | auto *ParentClass = cast<CXXRecordDecl>(FD->getParent()); | ||||
9012 | S.Diag(FD->getLocation(), | ||||
9013 | diag::note_deleted_special_member_class_subobject) | ||||
9014 | << getEffectiveCSM() << ParentClass << /*IsField*/true | ||||
9015 | << FD << 4 << /*IsDtorCallInCtor*/false << /*IsObjCPtr*/true; | ||||
9016 | } | ||||
9017 | |||||
9018 | return true; | ||||
9019 | } | ||||
9020 | |||||
9021 | /// Check whether we should delete a special member function due to the class | ||||
9022 | /// having a particular direct or virtual base class. | ||||
9023 | bool SpecialMemberDeletionInfo::shouldDeleteForBase(CXXBaseSpecifier *Base) { | ||||
9024 | CXXRecordDecl *BaseClass = Base->getType()->getAsCXXRecordDecl(); | ||||
9025 | // If program is correct, BaseClass cannot be null, but if it is, the error | ||||
9026 | // must be reported elsewhere. | ||||
9027 | if (!BaseClass) | ||||
9028 | return false; | ||||
9029 | // If we have an inheriting constructor, check whether we're calling an | ||||
9030 | // inherited constructor instead of a default constructor. | ||||
9031 | Sema::SpecialMemberOverloadResult SMOR = lookupInheritedCtor(BaseClass); | ||||
9032 | if (auto *BaseCtor = SMOR.getMethod()) { | ||||
9033 | // Note that we do not check access along this path; other than that, | ||||
9034 | // this is the same as shouldDeleteForSubobjectCall(Base, BaseCtor, false); | ||||
9035 | // FIXME: Check that the base has a usable destructor! Sink this into | ||||
9036 | // shouldDeleteForClassSubobject. | ||||
9037 | if (BaseCtor->isDeleted() && Diagnose) { | ||||
9038 | S.Diag(Base->getBeginLoc(), | ||||
9039 | diag::note_deleted_special_member_class_subobject) | ||||
9040 | << getEffectiveCSM() << MD->getParent() << /*IsField*/ false | ||||
9041 | << Base->getType() << /*Deleted*/ 1 << /*IsDtorCallInCtor*/ false | ||||
9042 | << /*IsObjCPtr*/false; | ||||
9043 | S.NoteDeletedFunction(BaseCtor); | ||||
9044 | } | ||||
9045 | return BaseCtor->isDeleted(); | ||||
9046 | } | ||||
9047 | return shouldDeleteForClassSubobject(BaseClass, Base, 0); | ||||
9048 | } | ||||
9049 | |||||
9050 | /// Check whether we should delete a special member function due to the class | ||||
9051 | /// having a particular non-static data member. | ||||
9052 | bool SpecialMemberDeletionInfo::shouldDeleteForField(FieldDecl *FD) { | ||||
9053 | QualType FieldType = S.Context.getBaseElementType(FD->getType()); | ||||
9054 | CXXRecordDecl *FieldRecord = FieldType->getAsCXXRecordDecl(); | ||||
9055 | |||||
9056 | if (inUnion() && shouldDeleteForVariantObjCPtrMember(FD, FieldType)) | ||||
9057 | return true; | ||||
9058 | |||||
9059 | if (CSM == Sema::CXXDefaultConstructor) { | ||||
9060 | // For a default constructor, all references must be initialized in-class | ||||
9061 | // and, if a union, it must have a non-const member. | ||||
9062 | if (FieldType->isReferenceType() && !FD->hasInClassInitializer()) { | ||||
9063 | if (Diagnose) | ||||
9064 | S.Diag(FD->getLocation(), diag::note_deleted_default_ctor_uninit_field) | ||||
9065 | << !!ICI << MD->getParent() << FD << FieldType << /*Reference*/0; | ||||
9066 | return true; | ||||
9067 | } | ||||
9068 | // C++11 [class.ctor]p5: any non-variant non-static data member of | ||||
9069 | // const-qualified type (or array thereof) with no | ||||
9070 | // brace-or-equal-initializer does not have a user-provided default | ||||
9071 | // constructor. | ||||
9072 | if (!inUnion() && FieldType.isConstQualified() && | ||||
9073 | !FD->hasInClassInitializer() && | ||||
9074 | (!FieldRecord || !FieldRecord->hasUserProvidedDefaultConstructor())) { | ||||
9075 | if (Diagnose) | ||||
9076 | S.Diag(FD->getLocation(), diag::note_deleted_default_ctor_uninit_field) | ||||
9077 | << !!ICI << MD->getParent() << FD << FD->getType() << /*Const*/1; | ||||
9078 | return true; | ||||
9079 | } | ||||
9080 | |||||
9081 | if (inUnion() && !FieldType.isConstQualified()) | ||||
9082 | AllFieldsAreConst = false; | ||||
9083 | } else if (CSM == Sema::CXXCopyConstructor) { | ||||
9084 | // For a copy constructor, data members must not be of rvalue reference | ||||
9085 | // type. | ||||
9086 | if (FieldType->isRValueReferenceType()) { | ||||
9087 | if (Diagnose) | ||||
9088 | S.Diag(FD->getLocation(), diag::note_deleted_copy_ctor_rvalue_reference) | ||||
9089 | << MD->getParent() << FD << FieldType; | ||||
9090 | return true; | ||||
9091 | } | ||||
9092 | } else if (IsAssignment) { | ||||
9093 | // For an assignment operator, data members must not be of reference type. | ||||
9094 | if (FieldType->isReferenceType()) { | ||||
9095 | if (Diagnose) | ||||
9096 | S.Diag(FD->getLocation(), diag::note_deleted_assign_field) | ||||
9097 | << isMove() << MD->getParent() << FD << FieldType << /*Reference*/0; | ||||
9098 | return true; | ||||
9099 | } | ||||
9100 | if (!FieldRecord && FieldType.isConstQualified()) { | ||||
9101 | // C++11 [class.copy]p23: | ||||
9102 | // -- a non-static data member of const non-class type (or array thereof) | ||||
9103 | if (Diagnose) | ||||
9104 | S.Diag(FD->getLocation(), diag::note_deleted_assign_field) | ||||
9105 | << isMove() << MD->getParent() << FD << FD->getType() << /*Const*/1; | ||||
9106 | return true; | ||||
9107 | } | ||||
9108 | } | ||||
9109 | |||||
9110 | if (FieldRecord) { | ||||
9111 | // Some additional restrictions exist on the variant members. | ||||
9112 | if (!inUnion() && FieldRecord->isUnion() && | ||||
9113 | FieldRecord->isAnonymousStructOrUnion()) { | ||||
9114 | bool AllVariantFieldsAreConst = true; | ||||
9115 | |||||
9116 | // FIXME: Handle anonymous unions declared within anonymous unions. | ||||
9117 | for (auto *UI : FieldRecord->fields()) { | ||||
9118 | QualType UnionFieldType = S.Context.getBaseElementType(UI->getType()); | ||||
9119 | |||||
9120 | if (shouldDeleteForVariantObjCPtrMember(&*UI, UnionFieldType)) | ||||
9121 | return true; | ||||
9122 | |||||
9123 | if (!UnionFieldType.isConstQualified()) | ||||
9124 | AllVariantFieldsAreConst = false; | ||||
9125 | |||||
9126 | CXXRecordDecl *UnionFieldRecord = UnionFieldType->getAsCXXRecordDecl(); | ||||
9127 | if (UnionFieldRecord && | ||||
9128 | shouldDeleteForClassSubobject(UnionFieldRecord, UI, | ||||
9129 | UnionFieldType.getCVRQualifiers())) | ||||
9130 | return true; | ||||
9131 | } | ||||
9132 | |||||
9133 | // At least one member in each anonymous union must be non-const | ||||
9134 | if (CSM == Sema::CXXDefaultConstructor && AllVariantFieldsAreConst && | ||||
9135 | !FieldRecord->field_empty()) { | ||||
9136 | if (Diagnose) | ||||
9137 | S.Diag(FieldRecord->getLocation(), | ||||
9138 | diag::note_deleted_default_ctor_all_const) | ||||
9139 | << !!ICI << MD->getParent() << /*anonymous union*/1; | ||||
9140 | return true; | ||||
9141 | } | ||||
9142 | |||||
9143 | // Don't check the implicit member of the anonymous union type. | ||||
9144 | // This is technically non-conformant, but sanity demands it. | ||||
9145 | return false; | ||||
9146 | } | ||||
9147 | |||||
9148 | if (shouldDeleteForClassSubobject(FieldRecord, FD, | ||||
9149 | FieldType.getCVRQualifiers())) | ||||
9150 | return true; | ||||
9151 | } | ||||
9152 | |||||
9153 | return false; | ||||
9154 | } | ||||
9155 | |||||
9156 | /// C++11 [class.ctor] p5: | ||||
9157 | /// A defaulted default constructor for a class X is defined as deleted if | ||||
9158 | /// X is a union and all of its variant members are of const-qualified type. | ||||
9159 | bool SpecialMemberDeletionInfo::shouldDeleteForAllConstMembers() { | ||||
9160 | // This is a silly definition, because it gives an empty union a deleted | ||||
9161 | // default constructor. Don't do that. | ||||
9162 | if (CSM == Sema::CXXDefaultConstructor && inUnion() && AllFieldsAreConst) { | ||||
9163 | bool AnyFields = false; | ||||
9164 | for (auto *F : MD->getParent()->fields()) | ||||
9165 | if ((AnyFields = !F->isUnnamedBitfield())) | ||||
9166 | break; | ||||
9167 | if (!AnyFields) | ||||
9168 | return false; | ||||
9169 | if (Diagnose) | ||||
9170 | S.Diag(MD->getParent()->getLocation(), | ||||
9171 | diag::note_deleted_default_ctor_all_const) | ||||
9172 | << !!ICI << MD->getParent() << /*not anonymous union*/0; | ||||
9173 | return true; | ||||
9174 | } | ||||
9175 | return false; | ||||
9176 | } | ||||
9177 | |||||
9178 | /// Determine whether a defaulted special member function should be defined as | ||||
9179 | /// deleted, as specified in C++11 [class.ctor]p5, C++11 [class.copy]p11, | ||||
9180 | /// C++11 [class.copy]p23, and C++11 [class.dtor]p5. | ||||
9181 | bool Sema::ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM, | ||||
9182 | InheritedConstructorInfo *ICI, | ||||
9183 | bool Diagnose) { | ||||
9184 | if (MD->isInvalidDecl()) | ||||
9185 | return false; | ||||
9186 | CXXRecordDecl *RD = MD->getParent(); | ||||
9187 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9187, __extension__ __PRETTY_FUNCTION__)); | ||||
9188 | if (!LangOpts.CPlusPlus11 || RD->isInvalidDecl()) | ||||
9189 | return false; | ||||
9190 | |||||
9191 | // C++11 [expr.lambda.prim]p19: | ||||
9192 | // The closure type associated with a lambda-expression has a | ||||
9193 | // deleted (8.4.3) default constructor and a deleted copy | ||||
9194 | // assignment operator. | ||||
9195 | // C++2a adds back these operators if the lambda has no lambda-capture. | ||||
9196 | if (RD->isLambda() && !RD->lambdaIsDefaultConstructibleAndAssignable() && | ||||
9197 | (CSM == CXXDefaultConstructor || CSM == CXXCopyAssignment)) { | ||||
9198 | if (Diagnose) | ||||
9199 | Diag(RD->getLocation(), diag::note_lambda_decl); | ||||
9200 | return true; | ||||
9201 | } | ||||
9202 | |||||
9203 | // For an anonymous struct or union, the copy and assignment special members | ||||
9204 | // will never be used, so skip the check. For an anonymous union declared at | ||||
9205 | // namespace scope, the constructor and destructor are used. | ||||
9206 | if (CSM != CXXDefaultConstructor && CSM != CXXDestructor && | ||||
9207 | RD->isAnonymousStructOrUnion()) | ||||
9208 | return false; | ||||
9209 | |||||
9210 | // C++11 [class.copy]p7, p18: | ||||
9211 | // If the class definition declares a move constructor or move assignment | ||||
9212 | // operator, an implicitly declared copy constructor or copy assignment | ||||
9213 | // operator is defined as deleted. | ||||
9214 | if (MD->isImplicit() && | ||||
9215 | (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment)) { | ||||
9216 | CXXMethodDecl *UserDeclaredMove = nullptr; | ||||
9217 | |||||
9218 | // In Microsoft mode up to MSVC 2013, a user-declared move only causes the | ||||
9219 | // deletion of the corresponding copy operation, not both copy operations. | ||||
9220 | // MSVC 2015 has adopted the standards conforming behavior. | ||||
9221 | bool DeletesOnlyMatchingCopy = | ||||
9222 | getLangOpts().MSVCCompat && | ||||
9223 | !getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015); | ||||
9224 | |||||
9225 | if (RD->hasUserDeclaredMoveConstructor() && | ||||
9226 | (!DeletesOnlyMatchingCopy || CSM == CXXCopyConstructor)) { | ||||
9227 | if (!Diagnose) return true; | ||||
9228 | |||||
9229 | // Find any user-declared move constructor. | ||||
9230 | for (auto *I : RD->ctors()) { | ||||
9231 | if (I->isMoveConstructor()) { | ||||
9232 | UserDeclaredMove = I; | ||||
9233 | break; | ||||
9234 | } | ||||
9235 | } | ||||
9236 | assert(UserDeclaredMove)(static_cast <bool> (UserDeclaredMove) ? void (0) : __assert_fail ("UserDeclaredMove", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9236, __extension__ __PRETTY_FUNCTION__)); | ||||
9237 | } else if (RD->hasUserDeclaredMoveAssignment() && | ||||
9238 | (!DeletesOnlyMatchingCopy || CSM == CXXCopyAssignment)) { | ||||
9239 | if (!Diagnose) return true; | ||||
9240 | |||||
9241 | // Find any user-declared move assignment operator. | ||||
9242 | for (auto *I : RD->methods()) { | ||||
9243 | if (I->isMoveAssignmentOperator()) { | ||||
9244 | UserDeclaredMove = I; | ||||
9245 | break; | ||||
9246 | } | ||||
9247 | } | ||||
9248 | assert(UserDeclaredMove)(static_cast <bool> (UserDeclaredMove) ? void (0) : __assert_fail ("UserDeclaredMove", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9248, __extension__ __PRETTY_FUNCTION__)); | ||||
9249 | } | ||||
9250 | |||||
9251 | if (UserDeclaredMove) { | ||||
9252 | Diag(UserDeclaredMove->getLocation(), | ||||
9253 | diag::note_deleted_copy_user_declared_move) | ||||
9254 | << (CSM == CXXCopyAssignment) << RD | ||||
9255 | << UserDeclaredMove->isMoveAssignmentOperator(); | ||||
9256 | return true; | ||||
9257 | } | ||||
9258 | } | ||||
9259 | |||||
9260 | // Do access control from the special member function | ||||
9261 | ContextRAII MethodContext(*this, MD); | ||||
9262 | |||||
9263 | // C++11 [class.dtor]p5: | ||||
9264 | // -- for a virtual destructor, lookup of the non-array deallocation function | ||||
9265 | // results in an ambiguity or in a function that is deleted or inaccessible | ||||
9266 | if (CSM == CXXDestructor && MD->isVirtual()) { | ||||
9267 | FunctionDecl *OperatorDelete = nullptr; | ||||
9268 | DeclarationName Name = | ||||
9269 | Context.DeclarationNames.getCXXOperatorName(OO_Delete); | ||||
9270 | if (FindDeallocationFunction(MD->getLocation(), MD->getParent(), Name, | ||||
9271 | OperatorDelete, /*Diagnose*/false)) { | ||||
9272 | if (Diagnose) | ||||
9273 | Diag(RD->getLocation(), diag::note_deleted_dtor_no_operator_delete); | ||||
9274 | return true; | ||||
9275 | } | ||||
9276 | } | ||||
9277 | |||||
9278 | SpecialMemberDeletionInfo SMI(*this, MD, CSM, ICI, Diagnose); | ||||
9279 | |||||
9280 | // Per DR1611, do not consider virtual bases of constructors of abstract | ||||
9281 | // classes, since we are not going to construct them. | ||||
9282 | // Per DR1658, do not consider virtual bases of destructors of abstract | ||||
9283 | // classes either. | ||||
9284 | // Per DR2180, for assignment operators we only assign (and thus only | ||||
9285 | // consider) direct bases. | ||||
9286 | if (SMI.visit(SMI.IsAssignment ? SMI.VisitDirectBases | ||||
9287 | : SMI.VisitPotentiallyConstructedBases)) | ||||
9288 | return true; | ||||
9289 | |||||
9290 | if (SMI.shouldDeleteForAllConstMembers()) | ||||
9291 | return true; | ||||
9292 | |||||
9293 | if (getLangOpts().CUDA) { | ||||
9294 | // We should delete the special member in CUDA mode if target inference | ||||
9295 | // failed. | ||||
9296 | // For inherited constructors (non-null ICI), CSM may be passed so that MD | ||||
9297 | // is treated as certain special member, which may not reflect what special | ||||
9298 | // member MD really is. However inferCUDATargetForImplicitSpecialMember | ||||
9299 | // expects CSM to match MD, therefore recalculate CSM. | ||||
9300 | assert(ICI || CSM == getSpecialMember(MD))(static_cast <bool> (ICI || CSM == getSpecialMember(MD) ) ? void (0) : __assert_fail ("ICI || CSM == getSpecialMember(MD)" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9300, __extension__ __PRETTY_FUNCTION__)); | ||||
9301 | auto RealCSM = CSM; | ||||
9302 | if (ICI) | ||||
9303 | RealCSM = getSpecialMember(MD); | ||||
9304 | |||||
9305 | return inferCUDATargetForImplicitSpecialMember(RD, RealCSM, MD, | ||||
9306 | SMI.ConstArg, Diagnose); | ||||
9307 | } | ||||
9308 | |||||
9309 | return false; | ||||
9310 | } | ||||
9311 | |||||
9312 | void Sema::DiagnoseDeletedDefaultedFunction(FunctionDecl *FD) { | ||||
9313 | DefaultedFunctionKind DFK = getDefaultedFunctionKind(FD); | ||||
9314 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9314, __extension__ __PRETTY_FUNCTION__)); | ||||
9315 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9315, __extension__ __PRETTY_FUNCTION__)); | ||||
9316 | |||||
9317 | if (DFK.isSpecialMember()) { | ||||
9318 | ShouldDeleteSpecialMember(cast<CXXMethodDecl>(FD), DFK.asSpecialMember(), | ||||
9319 | nullptr, /*Diagnose=*/true); | ||||
9320 | } else { | ||||
9321 | DefaultedComparisonAnalyzer( | ||||
9322 | *this, cast<CXXRecordDecl>(FD->getLexicalDeclContext()), FD, | ||||
9323 | DFK.asComparison(), DefaultedComparisonAnalyzer::ExplainDeleted) | ||||
9324 | .visit(); | ||||
9325 | } | ||||
9326 | } | ||||
9327 | |||||
9328 | /// Perform lookup for a special member of the specified kind, and determine | ||||
9329 | /// whether it is trivial. If the triviality can be determined without the | ||||
9330 | /// lookup, skip it. This is intended for use when determining whether a | ||||
9331 | /// special member of a containing object is trivial, and thus does not ever | ||||
9332 | /// perform overload resolution for default constructors. | ||||
9333 | /// | ||||
9334 | /// If \p Selected is not \c NULL, \c *Selected will be filled in with the | ||||
9335 | /// member that was most likely to be intended to be trivial, if any. | ||||
9336 | /// | ||||
9337 | /// If \p ForCall is true, look at CXXRecord::HasTrivialSpecialMembersForCall to | ||||
9338 | /// determine whether the special member is trivial. | ||||
9339 | static bool findTrivialSpecialMember(Sema &S, CXXRecordDecl *RD, | ||||
9340 | Sema::CXXSpecialMember CSM, unsigned Quals, | ||||
9341 | bool ConstRHS, | ||||
9342 | Sema::TrivialABIHandling TAH, | ||||
9343 | CXXMethodDecl **Selected) { | ||||
9344 | if (Selected) | ||||
9345 | *Selected = nullptr; | ||||
9346 | |||||
9347 | switch (CSM) { | ||||
9348 | case Sema::CXXInvalid: | ||||
9349 | llvm_unreachable("not a special member")::llvm::llvm_unreachable_internal("not a special member", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9349); | ||||
9350 | |||||
9351 | case Sema::CXXDefaultConstructor: | ||||
9352 | // C++11 [class.ctor]p5: | ||||
9353 | // A default constructor is trivial if: | ||||
9354 | // - all the [direct subobjects] have trivial default constructors | ||||
9355 | // | ||||
9356 | // Note, no overload resolution is performed in this case. | ||||
9357 | if (RD->hasTrivialDefaultConstructor()) | ||||
9358 | return true; | ||||
9359 | |||||
9360 | if (Selected) { | ||||
9361 | // If there's a default constructor which could have been trivial, dig it | ||||
9362 | // out. Otherwise, if there's any user-provided default constructor, point | ||||
9363 | // to that as an example of why there's not a trivial one. | ||||
9364 | CXXConstructorDecl *DefCtor = nullptr; | ||||
9365 | if (RD->needsImplicitDefaultConstructor()) | ||||
9366 | S.DeclareImplicitDefaultConstructor(RD); | ||||
9367 | for (auto *CI : RD->ctors()) { | ||||
9368 | if (!CI->isDefaultConstructor()) | ||||
9369 | continue; | ||||
9370 | DefCtor = CI; | ||||
9371 | if (!DefCtor->isUserProvided()) | ||||
9372 | break; | ||||
9373 | } | ||||
9374 | |||||
9375 | *Selected = DefCtor; | ||||
9376 | } | ||||
9377 | |||||
9378 | return false; | ||||
9379 | |||||
9380 | case Sema::CXXDestructor: | ||||
9381 | // C++11 [class.dtor]p5: | ||||
9382 | // A destructor is trivial if: | ||||
9383 | // - all the direct [subobjects] have trivial destructors | ||||
9384 | if (RD->hasTrivialDestructor() || | ||||
9385 | (TAH == Sema::TAH_ConsiderTrivialABI && | ||||
9386 | RD->hasTrivialDestructorForCall())) | ||||
9387 | return true; | ||||
9388 | |||||
9389 | if (Selected) { | ||||
9390 | if (RD->needsImplicitDestructor()) | ||||
9391 | S.DeclareImplicitDestructor(RD); | ||||
9392 | *Selected = RD->getDestructor(); | ||||
9393 | } | ||||
9394 | |||||
9395 | return false; | ||||
9396 | |||||
9397 | case Sema::CXXCopyConstructor: | ||||
9398 | // C++11 [class.copy]p12: | ||||
9399 | // A copy constructor is trivial if: | ||||
9400 | // - the constructor selected to copy each direct [subobject] is trivial | ||||
9401 | if (RD->hasTrivialCopyConstructor() || | ||||
9402 | (TAH == Sema::TAH_ConsiderTrivialABI && | ||||
9403 | RD->hasTrivialCopyConstructorForCall())) { | ||||
9404 | if (Quals == Qualifiers::Const) | ||||
9405 | // We must either select the trivial copy constructor or reach an | ||||
9406 | // ambiguity; no need to actually perform overload resolution. | ||||
9407 | return true; | ||||
9408 | } else if (!Selected) { | ||||
9409 | return false; | ||||
9410 | } | ||||
9411 | // In C++98, we are not supposed to perform overload resolution here, but we | ||||
9412 | // treat that as a language defect, as suggested on cxx-abi-dev, to treat | ||||
9413 | // cases like B as having a non-trivial copy constructor: | ||||
9414 | // struct A { template<typename T> A(T&); }; | ||||
9415 | // struct B { mutable A a; }; | ||||
9416 | goto NeedOverloadResolution; | ||||
9417 | |||||
9418 | case Sema::CXXCopyAssignment: | ||||
9419 | // C++11 [class.copy]p25: | ||||
9420 | // A copy assignment operator is trivial if: | ||||
9421 | // - the assignment operator selected to copy each direct [subobject] is | ||||
9422 | // trivial | ||||
9423 | if (RD->hasTrivialCopyAssignment()) { | ||||
9424 | if (Quals == Qualifiers::Const) | ||||
9425 | return true; | ||||
9426 | } else if (!Selected) { | ||||
9427 | return false; | ||||
9428 | } | ||||
9429 | // In C++98, we are not supposed to perform overload resolution here, but we | ||||
9430 | // treat that as a language defect. | ||||
9431 | goto NeedOverloadResolution; | ||||
9432 | |||||
9433 | case Sema::CXXMoveConstructor: | ||||
9434 | case Sema::CXXMoveAssignment: | ||||
9435 | NeedOverloadResolution: | ||||
9436 | Sema::SpecialMemberOverloadResult SMOR = | ||||
9437 | lookupCallFromSpecialMember(S, RD, CSM, Quals, ConstRHS); | ||||
9438 | |||||
9439 | // The standard doesn't describe how to behave if the lookup is ambiguous. | ||||
9440 | // We treat it as not making the member non-trivial, just like the standard | ||||
9441 | // mandates for the default constructor. This should rarely matter, because | ||||
9442 | // the member will also be deleted. | ||||
9443 | if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous) | ||||
9444 | return true; | ||||
9445 | |||||
9446 | if (!SMOR.getMethod()) { | ||||
9447 | assert(SMOR.getKind() ==(static_cast <bool> (SMOR.getKind() == Sema::SpecialMemberOverloadResult ::NoMemberOrDeleted) ? void (0) : __assert_fail ("SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9448, __extension__ __PRETTY_FUNCTION__)) | ||||
9448 | Sema::SpecialMemberOverloadResult::NoMemberOrDeleted)(static_cast <bool> (SMOR.getKind() == Sema::SpecialMemberOverloadResult ::NoMemberOrDeleted) ? void (0) : __assert_fail ("SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9448, __extension__ __PRETTY_FUNCTION__)); | ||||
9449 | return false; | ||||
9450 | } | ||||
9451 | |||||
9452 | // We deliberately don't check if we found a deleted special member. We're | ||||
9453 | // not supposed to! | ||||
9454 | if (Selected) | ||||
9455 | *Selected = SMOR.getMethod(); | ||||
9456 | |||||
9457 | if (TAH == Sema::TAH_ConsiderTrivialABI && | ||||
9458 | (CSM == Sema::CXXCopyConstructor || CSM == Sema::CXXMoveConstructor)) | ||||
9459 | return SMOR.getMethod()->isTrivialForCall(); | ||||
9460 | return SMOR.getMethod()->isTrivial(); | ||||
9461 | } | ||||
9462 | |||||
9463 | llvm_unreachable("unknown special method kind")::llvm::llvm_unreachable_internal("unknown special method kind" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9463); | ||||
9464 | } | ||||
9465 | |||||
9466 | static CXXConstructorDecl *findUserDeclaredCtor(CXXRecordDecl *RD) { | ||||
9467 | for (auto *CI : RD->ctors()) | ||||
9468 | if (!CI->isImplicit()) | ||||
9469 | return CI; | ||||
9470 | |||||
9471 | // Look for constructor templates. | ||||
9472 | typedef CXXRecordDecl::specific_decl_iterator<FunctionTemplateDecl> tmpl_iter; | ||||
9473 | for (tmpl_iter TI(RD->decls_begin()), TE(RD->decls_end()); TI != TE; ++TI) { | ||||
9474 | if (CXXConstructorDecl *CD = | ||||
9475 | dyn_cast<CXXConstructorDecl>(TI->getTemplatedDecl())) | ||||
9476 | return CD; | ||||
9477 | } | ||||
9478 | |||||
9479 | return nullptr; | ||||
9480 | } | ||||
9481 | |||||
9482 | /// The kind of subobject we are checking for triviality. The values of this | ||||
9483 | /// enumeration are used in diagnostics. | ||||
9484 | enum TrivialSubobjectKind { | ||||
9485 | /// The subobject is a base class. | ||||
9486 | TSK_BaseClass, | ||||
9487 | /// The subobject is a non-static data member. | ||||
9488 | TSK_Field, | ||||
9489 | /// The object is actually the complete object. | ||||
9490 | TSK_CompleteObject | ||||
9491 | }; | ||||
9492 | |||||
9493 | /// Check whether the special member selected for a given type would be trivial. | ||||
9494 | static bool checkTrivialSubobjectCall(Sema &S, SourceLocation SubobjLoc, | ||||
9495 | QualType SubType, bool ConstRHS, | ||||
9496 | Sema::CXXSpecialMember CSM, | ||||
9497 | TrivialSubobjectKind Kind, | ||||
9498 | Sema::TrivialABIHandling TAH, bool Diagnose) { | ||||
9499 | CXXRecordDecl *SubRD = SubType->getAsCXXRecordDecl(); | ||||
9500 | if (!SubRD) | ||||
9501 | return true; | ||||
9502 | |||||
9503 | CXXMethodDecl *Selected; | ||||
9504 | if (findTrivialSpecialMember(S, SubRD, CSM, SubType.getCVRQualifiers(), | ||||
9505 | ConstRHS, TAH, Diagnose ? &Selected : nullptr)) | ||||
9506 | return true; | ||||
9507 | |||||
9508 | if (Diagnose) { | ||||
9509 | if (ConstRHS) | ||||
9510 | SubType.addConst(); | ||||
9511 | |||||
9512 | if (!Selected && CSM == Sema::CXXDefaultConstructor) { | ||||
9513 | S.Diag(SubobjLoc, diag::note_nontrivial_no_def_ctor) | ||||
9514 | << Kind << SubType.getUnqualifiedType(); | ||||
9515 | if (CXXConstructorDecl *CD = findUserDeclaredCtor(SubRD)) | ||||
9516 | S.Diag(CD->getLocation(), diag::note_user_declared_ctor); | ||||
9517 | } else if (!Selected) | ||||
9518 | S.Diag(SubobjLoc, diag::note_nontrivial_no_copy) | ||||
9519 | << Kind << SubType.getUnqualifiedType() << CSM << SubType; | ||||
9520 | else if (Selected->isUserProvided()) { | ||||
9521 | if (Kind == TSK_CompleteObject) | ||||
9522 | S.Diag(Selected->getLocation(), diag::note_nontrivial_user_provided) | ||||
9523 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||
9524 | else { | ||||
9525 | S.Diag(SubobjLoc, diag::note_nontrivial_user_provided) | ||||
9526 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||
9527 | S.Diag(Selected->getLocation(), diag::note_declared_at); | ||||
9528 | } | ||||
9529 | } else { | ||||
9530 | if (Kind != TSK_CompleteObject) | ||||
9531 | S.Diag(SubobjLoc, diag::note_nontrivial_subobject) | ||||
9532 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||
9533 | |||||
9534 | // Explain why the defaulted or deleted special member isn't trivial. | ||||
9535 | S.SpecialMemberIsTrivial(Selected, CSM, Sema::TAH_IgnoreTrivialABI, | ||||
9536 | Diagnose); | ||||
9537 | } | ||||
9538 | } | ||||
9539 | |||||
9540 | return false; | ||||
9541 | } | ||||
9542 | |||||
9543 | /// Check whether the members of a class type allow a special member to be | ||||
9544 | /// trivial. | ||||
9545 | static bool checkTrivialClassMembers(Sema &S, CXXRecordDecl *RD, | ||||
9546 | Sema::CXXSpecialMember CSM, | ||||
9547 | bool ConstArg, | ||||
9548 | Sema::TrivialABIHandling TAH, | ||||
9549 | bool Diagnose) { | ||||
9550 | for (const auto *FI : RD->fields()) { | ||||
9551 | if (FI->isInvalidDecl() || FI->isUnnamedBitfield()) | ||||
9552 | continue; | ||||
9553 | |||||
9554 | QualType FieldType = S.Context.getBaseElementType(FI->getType()); | ||||
9555 | |||||
9556 | // Pretend anonymous struct or union members are members of this class. | ||||
9557 | if (FI->isAnonymousStructOrUnion()) { | ||||
9558 | if (!checkTrivialClassMembers(S, FieldType->getAsCXXRecordDecl(), | ||||
9559 | CSM, ConstArg, TAH, Diagnose)) | ||||
9560 | return false; | ||||
9561 | continue; | ||||
9562 | } | ||||
9563 | |||||
9564 | // C++11 [class.ctor]p5: | ||||
9565 | // A default constructor is trivial if [...] | ||||
9566 | // -- no non-static data member of its class has a | ||||
9567 | // brace-or-equal-initializer | ||||
9568 | if (CSM == Sema::CXXDefaultConstructor && FI->hasInClassInitializer()) { | ||||
9569 | if (Diagnose) | ||||
9570 | S.Diag(FI->getLocation(), diag::note_nontrivial_default_member_init) | ||||
9571 | << FI; | ||||
9572 | return false; | ||||
9573 | } | ||||
9574 | |||||
9575 | // Objective C ARC 4.3.5: | ||||
9576 | // [...] nontrivally ownership-qualified types are [...] not trivially | ||||
9577 | // default constructible, copy constructible, move constructible, copy | ||||
9578 | // assignable, move assignable, or destructible [...] | ||||
9579 | if (FieldType.hasNonTrivialObjCLifetime()) { | ||||
9580 | if (Diagnose) | ||||
9581 | S.Diag(FI->getLocation(), diag::note_nontrivial_objc_ownership) | ||||
9582 | << RD << FieldType.getObjCLifetime(); | ||||
9583 | return false; | ||||
9584 | } | ||||
9585 | |||||
9586 | bool ConstRHS = ConstArg && !FI->isMutable(); | ||||
9587 | if (!checkTrivialSubobjectCall(S, FI->getLocation(), FieldType, ConstRHS, | ||||
9588 | CSM, TSK_Field, TAH, Diagnose)) | ||||
9589 | return false; | ||||
9590 | } | ||||
9591 | |||||
9592 | return true; | ||||
9593 | } | ||||
9594 | |||||
9595 | /// Diagnose why the specified class does not have a trivial special member of | ||||
9596 | /// the given kind. | ||||
9597 | void Sema::DiagnoseNontrivial(const CXXRecordDecl *RD, CXXSpecialMember CSM) { | ||||
9598 | QualType Ty = Context.getRecordType(RD); | ||||
9599 | |||||
9600 | bool ConstArg = (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment); | ||||
9601 | checkTrivialSubobjectCall(*this, RD->getLocation(), Ty, ConstArg, CSM, | ||||
9602 | TSK_CompleteObject, TAH_IgnoreTrivialABI, | ||||
9603 | /*Diagnose*/true); | ||||
9604 | } | ||||
9605 | |||||
9606 | /// Determine whether a defaulted or deleted special member function is trivial, | ||||
9607 | /// as specified in C++11 [class.ctor]p5, C++11 [class.copy]p12, | ||||
9608 | /// C++11 [class.copy]p25, and C++11 [class.dtor]p5. | ||||
9609 | bool Sema::SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM, | ||||
9610 | TrivialABIHandling TAH, bool Diagnose) { | ||||
9611 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9611, __extension__ __PRETTY_FUNCTION__)); | ||||
9612 | |||||
9613 | CXXRecordDecl *RD = MD->getParent(); | ||||
9614 | |||||
9615 | bool ConstArg = false; | ||||
9616 | |||||
9617 | // C++11 [class.copy]p12, p25: [DR1593] | ||||
9618 | // A [special member] is trivial if [...] its parameter-type-list is | ||||
9619 | // equivalent to the parameter-type-list of an implicit declaration [...] | ||||
9620 | switch (CSM) { | ||||
9621 | case CXXDefaultConstructor: | ||||
9622 | case CXXDestructor: | ||||
9623 | // Trivial default constructors and destructors cannot have parameters. | ||||
9624 | break; | ||||
9625 | |||||
9626 | case CXXCopyConstructor: | ||||
9627 | case CXXCopyAssignment: { | ||||
9628 | // Trivial copy operations always have const, non-volatile parameter types. | ||||
9629 | ConstArg = true; | ||||
9630 | const ParmVarDecl *Param0 = MD->getParamDecl(0); | ||||
9631 | const ReferenceType *RT = Param0->getType()->getAs<ReferenceType>(); | ||||
9632 | if (!RT || RT->getPointeeType().getCVRQualifiers() != Qualifiers::Const) { | ||||
9633 | if (Diagnose) | ||||
9634 | Diag(Param0->getLocation(), diag::note_nontrivial_param_type) | ||||
9635 | << Param0->getSourceRange() << Param0->getType() | ||||
9636 | << Context.getLValueReferenceType( | ||||
9637 | Context.getRecordType(RD).withConst()); | ||||
9638 | return false; | ||||
9639 | } | ||||
9640 | break; | ||||
9641 | } | ||||
9642 | |||||
9643 | case CXXMoveConstructor: | ||||
9644 | case CXXMoveAssignment: { | ||||
9645 | // Trivial move operations always have non-cv-qualified parameters. | ||||
9646 | const ParmVarDecl *Param0 = MD->getParamDecl(0); | ||||
9647 | const RValueReferenceType *RT = | ||||
9648 | Param0->getType()->getAs<RValueReferenceType>(); | ||||
9649 | if (!RT || RT->getPointeeType().getCVRQualifiers()) { | ||||
9650 | if (Diagnose) | ||||
9651 | Diag(Param0->getLocation(), diag::note_nontrivial_param_type) | ||||
9652 | << Param0->getSourceRange() << Param0->getType() | ||||
9653 | << Context.getRValueReferenceType(Context.getRecordType(RD)); | ||||
9654 | return false; | ||||
9655 | } | ||||
9656 | break; | ||||
9657 | } | ||||
9658 | |||||
9659 | case CXXInvalid: | ||||
9660 | llvm_unreachable("not a special member")::llvm::llvm_unreachable_internal("not a special member", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9660); | ||||
9661 | } | ||||
9662 | |||||
9663 | if (MD->getMinRequiredArguments() < MD->getNumParams()) { | ||||
9664 | if (Diagnose) | ||||
9665 | Diag(MD->getParamDecl(MD->getMinRequiredArguments())->getLocation(), | ||||
9666 | diag::note_nontrivial_default_arg) | ||||
9667 | << MD->getParamDecl(MD->getMinRequiredArguments())->getSourceRange(); | ||||
9668 | return false; | ||||
9669 | } | ||||
9670 | if (MD->isVariadic()) { | ||||
9671 | if (Diagnose) | ||||
9672 | Diag(MD->getLocation(), diag::note_nontrivial_variadic); | ||||
9673 | return false; | ||||
9674 | } | ||||
9675 | |||||
9676 | // C++11 [class.ctor]p5, C++11 [class.dtor]p5: | ||||
9677 | // A copy/move [constructor or assignment operator] is trivial if | ||||
9678 | // -- the [member] selected to copy/move each direct base class subobject | ||||
9679 | // is trivial | ||||
9680 | // | ||||
9681 | // C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||
9682 | // A [default constructor or destructor] is trivial if | ||||
9683 | // -- all the direct base classes have trivial [default constructors or | ||||
9684 | // destructors] | ||||
9685 | for (const auto &BI : RD->bases()) | ||||
9686 | if (!checkTrivialSubobjectCall(*this, BI.getBeginLoc(), BI.getType(), | ||||
9687 | ConstArg, CSM, TSK_BaseClass, TAH, Diagnose)) | ||||
9688 | return false; | ||||
9689 | |||||
9690 | // C++11 [class.ctor]p5, C++11 [class.dtor]p5: | ||||
9691 | // A copy/move [constructor or assignment operator] for a class X is | ||||
9692 | // trivial if | ||||
9693 | // -- for each non-static data member of X that is of class type (or array | ||||
9694 | // thereof), the constructor selected to copy/move that member is | ||||
9695 | // trivial | ||||
9696 | // | ||||
9697 | // C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||
9698 | // A [default constructor or destructor] is trivial if | ||||
9699 | // -- for all of the non-static data members of its class that are of class | ||||
9700 | // type (or array thereof), each such class has a trivial [default | ||||
9701 | // constructor or destructor] | ||||
9702 | if (!checkTrivialClassMembers(*this, RD, CSM, ConstArg, TAH, Diagnose)) | ||||
9703 | return false; | ||||
9704 | |||||
9705 | // C++11 [class.dtor]p5: | ||||
9706 | // A destructor is trivial if [...] | ||||
9707 | // -- the destructor is not virtual | ||||
9708 | if (CSM == CXXDestructor && MD->isVirtual()) { | ||||
9709 | if (Diagnose) | ||||
9710 | Diag(MD->getLocation(), diag::note_nontrivial_virtual_dtor) << RD; | ||||
9711 | return false; | ||||
9712 | } | ||||
9713 | |||||
9714 | // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||
9715 | // A [special member] for class X is trivial if [...] | ||||
9716 | // -- class X has no virtual functions and no virtual base classes | ||||
9717 | if (CSM != CXXDestructor && MD->getParent()->isDynamicClass()) { | ||||
9718 | if (!Diagnose) | ||||
9719 | return false; | ||||
9720 | |||||
9721 | if (RD->getNumVBases()) { | ||||
9722 | // Check for virtual bases. We already know that the corresponding | ||||
9723 | // member in all bases is trivial, so vbases must all be direct. | ||||
9724 | CXXBaseSpecifier &BS = *RD->vbases_begin(); | ||||
9725 | assert(BS.isVirtual())(static_cast <bool> (BS.isVirtual()) ? void (0) : __assert_fail ("BS.isVirtual()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9725, __extension__ __PRETTY_FUNCTION__)); | ||||
9726 | Diag(BS.getBeginLoc(), diag::note_nontrivial_has_virtual) << RD << 1; | ||||
9727 | return false; | ||||
9728 | } | ||||
9729 | |||||
9730 | // Must have a virtual method. | ||||
9731 | for (const auto *MI : RD->methods()) { | ||||
9732 | if (MI->isVirtual()) { | ||||
9733 | SourceLocation MLoc = MI->getBeginLoc(); | ||||
9734 | Diag(MLoc, diag::note_nontrivial_has_virtual) << RD << 0; | ||||
9735 | return false; | ||||
9736 | } | ||||
9737 | } | ||||
9738 | |||||
9739 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9739); | ||||
9740 | } | ||||
9741 | |||||
9742 | // Looks like it's trivial! | ||||
9743 | return true; | ||||
9744 | } | ||||
9745 | |||||
9746 | namespace { | ||||
9747 | struct FindHiddenVirtualMethod { | ||||
9748 | Sema *S; | ||||
9749 | CXXMethodDecl *Method; | ||||
9750 | llvm::SmallPtrSet<const CXXMethodDecl *, 8> OverridenAndUsingBaseMethods; | ||||
9751 | SmallVector<CXXMethodDecl *, 8> OverloadedMethods; | ||||
9752 | |||||
9753 | private: | ||||
9754 | /// Check whether any most overridden method from MD in Methods | ||||
9755 | static bool CheckMostOverridenMethods( | ||||
9756 | const CXXMethodDecl *MD, | ||||
9757 | const llvm::SmallPtrSetImpl<const CXXMethodDecl *> &Methods) { | ||||
9758 | if (MD->size_overridden_methods() == 0) | ||||
9759 | return Methods.count(MD->getCanonicalDecl()); | ||||
9760 | for (const CXXMethodDecl *O : MD->overridden_methods()) | ||||
9761 | if (CheckMostOverridenMethods(O, Methods)) | ||||
9762 | return true; | ||||
9763 | return false; | ||||
9764 | } | ||||
9765 | |||||
9766 | public: | ||||
9767 | /// Member lookup function that determines whether a given C++ | ||||
9768 | /// method overloads virtual methods in a base class without overriding any, | ||||
9769 | /// to be used with CXXRecordDecl::lookupInBases(). | ||||
9770 | bool operator()(const CXXBaseSpecifier *Specifier, CXXBasePath &Path) { | ||||
9771 | RecordDecl *BaseRecord = | ||||
9772 | Specifier->getType()->castAs<RecordType>()->getDecl(); | ||||
9773 | |||||
9774 | DeclarationName Name = Method->getDeclName(); | ||||
9775 | assert(Name.getNameKind() == DeclarationName::Identifier)(static_cast <bool> (Name.getNameKind() == DeclarationName ::Identifier) ? void (0) : __assert_fail ("Name.getNameKind() == DeclarationName::Identifier" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 9775, __extension__ __PRETTY_FUNCTION__)); | ||||
9776 | |||||
9777 | bool foundSameNameMethod = false; | ||||
9778 | SmallVector<CXXMethodDecl *, 8> overloadedMethods; | ||||
9779 | for (Path.Decls = BaseRecord->lookup(Name).begin(); | ||||
9780 | Path.Decls != DeclContext::lookup_iterator(); ++Path.Decls) { | ||||
9781 | NamedDecl *D = *Path.Decls; | ||||
9782 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { | ||||
9783 | MD = MD->getCanonicalDecl(); | ||||
9784 | foundSameNameMethod = true; | ||||
9785 | // Interested only in hidden virtual methods. | ||||
9786 | if (!MD->isVirtual()) | ||||
9787 | continue; | ||||
9788 | // If the method we are checking overrides a method from its base | ||||
9789 | // don't warn about the other overloaded methods. Clang deviates from | ||||
9790 | // GCC by only diagnosing overloads of inherited virtual functions that | ||||
9791 | // do not override any other virtual functions in the base. GCC's | ||||
9792 | // -Woverloaded-virtual diagnoses any derived function hiding a virtual | ||||
9793 | // function from a base class. These cases may be better served by a | ||||
9794 | // warning (not specific to virtual functions) on call sites when the | ||||
9795 | // call would select a different function from the base class, were it | ||||
9796 | // visible. | ||||
9797 | // See FIXME in test/SemaCXX/warn-overload-virtual.cpp for an example. | ||||
9798 | if (!S->IsOverload(Method, MD, false)) | ||||
9799 | return true; | ||||
9800 | // Collect the overload only if its hidden. | ||||
9801 | if (!CheckMostOverridenMethods(MD, OverridenAndUsingBaseMethods)) | ||||
9802 | overloadedMethods.push_back(MD); | ||||
9803 | } | ||||
9804 | } | ||||
9805 | |||||
9806 | if (foundSameNameMethod) | ||||
9807 | OverloadedMethods.append(overloadedMethods.begin(), | ||||
9808 | overloadedMethods.end()); | ||||
9809 | return foundSameNameMethod; | ||||
9810 | } | ||||
9811 | }; | ||||
9812 | } // end anonymous namespace | ||||
9813 | |||||
9814 | /// Add the most overriden methods from MD to Methods | ||||
9815 | static void AddMostOverridenMethods(const CXXMethodDecl *MD, | ||||
9816 | llvm::SmallPtrSetImpl<const CXXMethodDecl *>& Methods) { | ||||
9817 | if (MD->size_overridden_methods() == 0) | ||||
9818 | Methods.insert(MD->getCanonicalDecl()); | ||||
9819 | else | ||||
9820 | for (const CXXMethodDecl *O : MD->overridden_methods()) | ||||
9821 | AddMostOverridenMethods(O, Methods); | ||||
9822 | } | ||||
9823 | |||||
9824 | /// Check if a method overloads virtual methods in a base class without | ||||
9825 | /// overriding any. | ||||
9826 | void Sema::FindHiddenVirtualMethods(CXXMethodDecl *MD, | ||||
9827 | SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods) { | ||||
9828 | if (!MD->getDeclName().isIdentifier()) | ||||
9829 | return; | ||||
9830 | |||||
9831 | CXXBasePaths Paths(/*FindAmbiguities=*/true, // true to look in all bases. | ||||
9832 | /*bool RecordPaths=*/false, | ||||
9833 | /*bool DetectVirtual=*/false); | ||||
9834 | FindHiddenVirtualMethod FHVM; | ||||
9835 | FHVM.Method = MD; | ||||
9836 | FHVM.S = this; | ||||
9837 | |||||
9838 | // Keep the base methods that were overridden or introduced in the subclass | ||||
9839 | // by 'using' in a set. A base method not in this set is hidden. | ||||
9840 | CXXRecordDecl *DC = MD->getParent(); | ||||
9841 | DeclContext::lookup_result R = DC->lookup(MD->getDeclName()); | ||||
9842 | for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) { | ||||
9843 | NamedDecl *ND = *I; | ||||
9844 | if (UsingShadowDecl *shad = dyn_cast<UsingShadowDecl>(*I)) | ||||
9845 | ND = shad->getTargetDecl(); | ||||
9846 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND)) | ||||
9847 | AddMostOverridenMethods(MD, FHVM.OverridenAndUsingBaseMethods); | ||||
9848 | } | ||||
9849 | |||||
9850 | if (DC->lookupInBases(FHVM, Paths)) | ||||
9851 | OverloadedMethods = FHVM.OverloadedMethods; | ||||
9852 | } | ||||
9853 | |||||
9854 | void Sema::NoteHiddenVirtualMethods(CXXMethodDecl *MD, | ||||
9855 | SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods) { | ||||
9856 | for (unsigned i = 0, e = OverloadedMethods.size(); i != e; ++i) { | ||||
9857 | CXXMethodDecl *overloadedMD = OverloadedMethods[i]; | ||||
9858 | PartialDiagnostic PD = PDiag( | ||||
9859 | diag::note_hidden_overloaded_virtual_declared_here) << overloadedMD; | ||||
9860 | HandleFunctionTypeMismatch(PD, MD->getType(), overloadedMD->getType()); | ||||
9861 | Diag(overloadedMD->getLocation(), PD); | ||||
9862 | } | ||||
9863 | } | ||||
9864 | |||||
9865 | /// Diagnose methods which overload virtual methods in a base class | ||||
9866 | /// without overriding any. | ||||
9867 | void Sema::DiagnoseHiddenVirtualMethods(CXXMethodDecl *MD) { | ||||
9868 | if (MD->isInvalidDecl()) | ||||
9869 | return; | ||||
9870 | |||||
9871 | if (Diags.isIgnored(diag::warn_overloaded_virtual, MD->getLocation())) | ||||
9872 | return; | ||||
9873 | |||||
9874 | SmallVector<CXXMethodDecl *, 8> OverloadedMethods; | ||||
9875 | FindHiddenVirtualMethods(MD, OverloadedMethods); | ||||
9876 | if (!OverloadedMethods.empty()) { | ||||
9877 | Diag(MD->getLocation(), diag::warn_overloaded_virtual) | ||||
9878 | << MD << (OverloadedMethods.size() > 1); | ||||
9879 | |||||
9880 | NoteHiddenVirtualMethods(MD, OverloadedMethods); | ||||
9881 | } | ||||
9882 | } | ||||
9883 | |||||
9884 | void Sema::checkIllFormedTrivialABIStruct(CXXRecordDecl &RD) { | ||||
9885 | auto PrintDiagAndRemoveAttr = [&](unsigned N) { | ||||
9886 | // No diagnostics if this is a template instantiation. | ||||
9887 | if (!isTemplateInstantiation(RD.getTemplateSpecializationKind())) { | ||||
9888 | Diag(RD.getAttr<TrivialABIAttr>()->getLocation(), | ||||
9889 | diag::ext_cannot_use_trivial_abi) << &RD; | ||||
9890 | Diag(RD.getAttr<TrivialABIAttr>()->getLocation(), | ||||
9891 | diag::note_cannot_use_trivial_abi_reason) << &RD << N; | ||||
9892 | } | ||||
9893 | RD.dropAttr<TrivialABIAttr>(); | ||||
9894 | }; | ||||
9895 | |||||
9896 | // Ill-formed if the copy and move constructors are deleted. | ||||
9897 | auto HasNonDeletedCopyOrMoveConstructor = [&]() { | ||||
9898 | // If the type is dependent, then assume it might have | ||||
9899 | // implicit copy or move ctor because we won't know yet at this point. | ||||
9900 | if (RD.isDependentType()) | ||||
9901 | return true; | ||||
9902 | if (RD.needsImplicitCopyConstructor() && | ||||
9903 | !RD.defaultedCopyConstructorIsDeleted()) | ||||
9904 | return true; | ||||
9905 | if (RD.needsImplicitMoveConstructor() && | ||||
9906 | !RD.defaultedMoveConstructorIsDeleted()) | ||||
9907 | return true; | ||||
9908 | for (const CXXConstructorDecl *CD : RD.ctors()) | ||||
9909 | if (CD->isCopyOrMoveConstructor() && !CD->isDeleted()) | ||||
9910 | return true; | ||||
9911 | return false; | ||||
9912 | }; | ||||
9913 | |||||
9914 | if (!HasNonDeletedCopyOrMoveConstructor()) { | ||||
9915 | PrintDiagAndRemoveAttr(0); | ||||
9916 | return; | ||||
9917 | } | ||||
9918 | |||||
9919 | // Ill-formed if the struct has virtual functions. | ||||
9920 | if (RD.isPolymorphic()) { | ||||
9921 | PrintDiagAndRemoveAttr(1); | ||||
9922 | return; | ||||
9923 | } | ||||
9924 | |||||
9925 | for (const auto &B : RD.bases()) { | ||||
9926 | // Ill-formed if the base class is non-trivial for the purpose of calls or a | ||||
9927 | // virtual base. | ||||
9928 | if (!B.getType()->isDependentType() && | ||||
9929 | !B.getType()->getAsCXXRecordDecl()->canPassInRegisters()) { | ||||
9930 | PrintDiagAndRemoveAttr(2); | ||||
9931 | return; | ||||
9932 | } | ||||
9933 | |||||
9934 | if (B.isVirtual()) { | ||||
9935 | PrintDiagAndRemoveAttr(3); | ||||
9936 | return; | ||||
9937 | } | ||||
9938 | } | ||||
9939 | |||||
9940 | for (const auto *FD : RD.fields()) { | ||||
9941 | // Ill-formed if the field is an ObjectiveC pointer or of a type that is | ||||
9942 | // non-trivial for the purpose of calls. | ||||
9943 | QualType FT = FD->getType(); | ||||
9944 | if (FT.getObjCLifetime() == Qualifiers::OCL_Weak) { | ||||
9945 | PrintDiagAndRemoveAttr(4); | ||||
9946 | return; | ||||
9947 | } | ||||
9948 | |||||
9949 | if (const auto *RT = FT->getBaseElementTypeUnsafe()->getAs<RecordType>()) | ||||
9950 | if (!RT->isDependentType() && | ||||
9951 | !cast<CXXRecordDecl>(RT->getDecl())->canPassInRegisters()) { | ||||
9952 | PrintDiagAndRemoveAttr(5); | ||||
9953 | return; | ||||
9954 | } | ||||
9955 | } | ||||
9956 | } | ||||
9957 | |||||
9958 | void Sema::ActOnFinishCXXMemberSpecification( | ||||
9959 | Scope *S, SourceLocation RLoc, Decl *TagDecl, SourceLocation LBrac, | ||||
9960 | SourceLocation RBrac, const ParsedAttributesView &AttrList) { | ||||
9961 | if (!TagDecl) | ||||
9962 | return; | ||||
9963 | |||||
9964 | AdjustDeclIfTemplate(TagDecl); | ||||
9965 | |||||
9966 | for (const ParsedAttr &AL : AttrList) { | ||||
9967 | if (AL.getKind() != ParsedAttr::AT_Visibility) | ||||
9968 | continue; | ||||
9969 | AL.setInvalid(); | ||||
9970 | Diag(AL.getLoc(), diag::warn_attribute_after_definition_ignored) << AL; | ||||
9971 | } | ||||
9972 | |||||
9973 | ActOnFields(S, RLoc, TagDecl, llvm::makeArrayRef( | ||||
9974 | // strict aliasing violation! | ||||
9975 | reinterpret_cast<Decl**>(FieldCollector->getCurFields()), | ||||
9976 | FieldCollector->getCurNumFields()), LBrac, RBrac, AttrList); | ||||
9977 | |||||
9978 | CheckCompletedCXXClass(S, cast<CXXRecordDecl>(TagDecl)); | ||||
9979 | } | ||||
9980 | |||||
9981 | /// Find the equality comparison functions that should be implicitly declared | ||||
9982 | /// in a given class definition, per C++2a [class.compare.default]p3. | ||||
9983 | static void findImplicitlyDeclaredEqualityComparisons( | ||||
9984 | ASTContext &Ctx, CXXRecordDecl *RD, | ||||
9985 | llvm::SmallVectorImpl<FunctionDecl *> &Spaceships) { | ||||
9986 | DeclarationName EqEq = Ctx.DeclarationNames.getCXXOperatorName(OO_EqualEqual); | ||||
9987 | if (!RD->lookup(EqEq).empty()) | ||||
9988 | // Member operator== explicitly declared: no implicit operator==s. | ||||
9989 | return; | ||||
9990 | |||||
9991 | // Traverse friends looking for an '==' or a '<=>'. | ||||
9992 | for (FriendDecl *Friend : RD->friends()) { | ||||
9993 | FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(Friend->getFriendDecl()); | ||||
9994 | if (!FD) continue; | ||||
9995 | |||||
9996 | if (FD->getOverloadedOperator() == OO_EqualEqual) { | ||||
9997 | // Friend operator== explicitly declared: no implicit operator==s. | ||||
9998 | Spaceships.clear(); | ||||
9999 | return; | ||||
10000 | } | ||||
10001 | |||||
10002 | if (FD->getOverloadedOperator() == OO_Spaceship && | ||||
10003 | FD->isExplicitlyDefaulted()) | ||||
10004 | Spaceships.push_back(FD); | ||||
10005 | } | ||||
10006 | |||||
10007 | // Look for members named 'operator<=>'. | ||||
10008 | DeclarationName Cmp = Ctx.DeclarationNames.getCXXOperatorName(OO_Spaceship); | ||||
10009 | for (NamedDecl *ND : RD->lookup(Cmp)) { | ||||
10010 | // Note that we could find a non-function here (either a function template | ||||
10011 | // or a using-declaration). Neither case results in an implicit | ||||
10012 | // 'operator=='. | ||||
10013 | if (auto *FD = dyn_cast<FunctionDecl>(ND)) | ||||
10014 | if (FD->isExplicitlyDefaulted()) | ||||
10015 | Spaceships.push_back(FD); | ||||
10016 | } | ||||
10017 | } | ||||
10018 | |||||
10019 | /// AddImplicitlyDeclaredMembersToClass - Adds any implicitly-declared | ||||
10020 | /// special functions, such as the default constructor, copy | ||||
10021 | /// constructor, or destructor, to the given C++ class (C++ | ||||
10022 | /// [special]p1). This routine can only be executed just before the | ||||
10023 | /// definition of the class is complete. | ||||
10024 | void Sema::AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl) { | ||||
10025 | // Don't add implicit special members to templated classes. | ||||
10026 | // FIXME: This means unqualified lookups for 'operator=' within a class | ||||
10027 | // template don't work properly. | ||||
10028 | if (!ClassDecl->isDependentType()) { | ||||
10029 | if (ClassDecl->needsImplicitDefaultConstructor()) { | ||||
10030 | ++getASTContext().NumImplicitDefaultConstructors; | ||||
10031 | |||||
10032 | if (ClassDecl->hasInheritedConstructor()) | ||||
10033 | DeclareImplicitDefaultConstructor(ClassDecl); | ||||
10034 | } | ||||
10035 | |||||
10036 | if (ClassDecl->needsImplicitCopyConstructor()) { | ||||
10037 | ++getASTContext().NumImplicitCopyConstructors; | ||||
10038 | |||||
10039 | // If the properties or semantics of the copy constructor couldn't be | ||||
10040 | // determined while the class was being declared, force a declaration | ||||
10041 | // of it now. | ||||
10042 | if (ClassDecl->needsOverloadResolutionForCopyConstructor() || | ||||
10043 | ClassDecl->hasInheritedConstructor()) | ||||
10044 | DeclareImplicitCopyConstructor(ClassDecl); | ||||
10045 | // For the MS ABI we need to know whether the copy ctor is deleted. A | ||||
10046 | // prerequisite for deleting the implicit copy ctor is that the class has | ||||
10047 | // a move ctor or move assignment that is either user-declared or whose | ||||
10048 | // semantics are inherited from a subobject. FIXME: We should provide a | ||||
10049 | // more direct way for CodeGen to ask whether the constructor was deleted. | ||||
10050 | else if (Context.getTargetInfo().getCXXABI().isMicrosoft() && | ||||
10051 | (ClassDecl->hasUserDeclaredMoveConstructor() || | ||||
10052 | ClassDecl->needsOverloadResolutionForMoveConstructor() || | ||||
10053 | ClassDecl->hasUserDeclaredMoveAssignment() || | ||||
10054 | ClassDecl->needsOverloadResolutionForMoveAssignment())) | ||||
10055 | DeclareImplicitCopyConstructor(ClassDecl); | ||||
10056 | } | ||||
10057 | |||||
10058 | if (getLangOpts().CPlusPlus11 && | ||||
10059 | ClassDecl->needsImplicitMoveConstructor()) { | ||||
10060 | ++getASTContext().NumImplicitMoveConstructors; | ||||
10061 | |||||
10062 | if (ClassDecl->needsOverloadResolutionForMoveConstructor() || | ||||
10063 | ClassDecl->hasInheritedConstructor()) | ||||
10064 | DeclareImplicitMoveConstructor(ClassDecl); | ||||
10065 | } | ||||
10066 | |||||
10067 | if (ClassDecl->needsImplicitCopyAssignment()) { | ||||
10068 | ++getASTContext().NumImplicitCopyAssignmentOperators; | ||||
10069 | |||||
10070 | // If we have a dynamic class, then the copy assignment operator may be | ||||
10071 | // virtual, so we have to declare it immediately. This ensures that, e.g., | ||||
10072 | // it shows up in the right place in the vtable and that we diagnose | ||||
10073 | // problems with the implicit exception specification. | ||||
10074 | if (ClassDecl->isDynamicClass() || | ||||
10075 | ClassDecl->needsOverloadResolutionForCopyAssignment() || | ||||
10076 | ClassDecl->hasInheritedAssignment()) | ||||
10077 | DeclareImplicitCopyAssignment(ClassDecl); | ||||
10078 | } | ||||
10079 | |||||
10080 | if (getLangOpts().CPlusPlus11 && ClassDecl->needsImplicitMoveAssignment()) { | ||||
10081 | ++getASTContext().NumImplicitMoveAssignmentOperators; | ||||
10082 | |||||
10083 | // Likewise for the move assignment operator. | ||||
10084 | if (ClassDecl->isDynamicClass() || | ||||
10085 | ClassDecl->needsOverloadResolutionForMoveAssignment() || | ||||
10086 | ClassDecl->hasInheritedAssignment()) | ||||
10087 | DeclareImplicitMoveAssignment(ClassDecl); | ||||
10088 | } | ||||
10089 | |||||
10090 | if (ClassDecl->needsImplicitDestructor()) { | ||||
10091 | ++getASTContext().NumImplicitDestructors; | ||||
10092 | |||||
10093 | // If we have a dynamic class, then the destructor may be virtual, so we | ||||
10094 | // have to declare the destructor immediately. This ensures that, e.g., it | ||||
10095 | // shows up in the right place in the vtable and that we diagnose problems | ||||
10096 | // with the implicit exception specification. | ||||
10097 | if (ClassDecl->isDynamicClass() || | ||||
10098 | ClassDecl->needsOverloadResolutionForDestructor()) | ||||
10099 | DeclareImplicitDestructor(ClassDecl); | ||||
10100 | } | ||||
10101 | } | ||||
10102 | |||||
10103 | // C++2a [class.compare.default]p3: | ||||
10104 | // If the member-specification does not explicitly declare any member or | ||||
10105 | // friend named operator==, an == operator function is declared implicitly | ||||
10106 | // for each defaulted three-way comparison operator function defined in | ||||
10107 | // the member-specification | ||||
10108 | // FIXME: Consider doing this lazily. | ||||
10109 | // We do this during the initial parse for a class template, not during | ||||
10110 | // instantiation, so that we can handle unqualified lookups for 'operator==' | ||||
10111 | // when parsing the template. | ||||
10112 | if (getLangOpts().CPlusPlus20 && !inTemplateInstantiation()) { | ||||
10113 | llvm::SmallVector<FunctionDecl *, 4> DefaultedSpaceships; | ||||
10114 | findImplicitlyDeclaredEqualityComparisons(Context, ClassDecl, | ||||
10115 | DefaultedSpaceships); | ||||
10116 | for (auto *FD : DefaultedSpaceships) | ||||
10117 | DeclareImplicitEqualityComparison(ClassDecl, FD); | ||||
10118 | } | ||||
10119 | } | ||||
10120 | |||||
10121 | unsigned | ||||
10122 | Sema::ActOnReenterTemplateScope(Decl *D, | ||||
10123 | llvm::function_ref<Scope *()> EnterScope) { | ||||
10124 | if (!D) | ||||
10125 | return 0; | ||||
10126 | AdjustDeclIfTemplate(D); | ||||
10127 | |||||
10128 | // In order to get name lookup right, reenter template scopes in order from | ||||
10129 | // outermost to innermost. | ||||
10130 | SmallVector<TemplateParameterList *, 4> ParameterLists; | ||||
10131 | DeclContext *LookupDC = dyn_cast<DeclContext>(D); | ||||
10132 | |||||
10133 | if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) { | ||||
10134 | for (unsigned i = 0; i < DD->getNumTemplateParameterLists(); ++i) | ||||
10135 | ParameterLists.push_back(DD->getTemplateParameterList(i)); | ||||
10136 | |||||
10137 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||
10138 | if (FunctionTemplateDecl *FTD = FD->getDescribedFunctionTemplate()) | ||||
10139 | ParameterLists.push_back(FTD->getTemplateParameters()); | ||||
10140 | } else if (VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||
10141 | LookupDC = VD->getDeclContext(); | ||||
10142 | |||||
10143 | if (VarTemplateDecl *VTD = VD->getDescribedVarTemplate()) | ||||
10144 | ParameterLists.push_back(VTD->getTemplateParameters()); | ||||
10145 | else if (auto *PSD = dyn_cast<VarTemplatePartialSpecializationDecl>(D)) | ||||
10146 | ParameterLists.push_back(PSD->getTemplateParameters()); | ||||
10147 | } | ||||
10148 | } else if (TagDecl *TD = dyn_cast<TagDecl>(D)) { | ||||
10149 | for (unsigned i = 0; i < TD->getNumTemplateParameterLists(); ++i) | ||||
10150 | ParameterLists.push_back(TD->getTemplateParameterList(i)); | ||||
10151 | |||||
10152 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(TD)) { | ||||
10153 | if (ClassTemplateDecl *CTD = RD->getDescribedClassTemplate()) | ||||
10154 | ParameterLists.push_back(CTD->getTemplateParameters()); | ||||
10155 | else if (auto *PSD = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) | ||||
10156 | ParameterLists.push_back(PSD->getTemplateParameters()); | ||||
10157 | } | ||||
10158 | } | ||||
10159 | // FIXME: Alias declarations and concepts. | ||||
10160 | |||||
10161 | unsigned Count = 0; | ||||
10162 | Scope *InnermostTemplateScope = nullptr; | ||||
10163 | for (TemplateParameterList *Params : ParameterLists) { | ||||
10164 | // Ignore explicit specializations; they don't contribute to the template | ||||
10165 | // depth. | ||||
10166 | if (Params->size() == 0) | ||||
10167 | continue; | ||||
10168 | |||||
10169 | InnermostTemplateScope = EnterScope(); | ||||
10170 | for (NamedDecl *Param : *Params) { | ||||
10171 | if (Param->getDeclName()) { | ||||
10172 | InnermostTemplateScope->AddDecl(Param); | ||||
10173 | IdResolver.AddDecl(Param); | ||||
10174 | } | ||||
10175 | } | ||||
10176 | ++Count; | ||||
10177 | } | ||||
10178 | |||||
10179 | // Associate the new template scopes with the corresponding entities. | ||||
10180 | if (InnermostTemplateScope) { | ||||
10181 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 10181, __extension__ __PRETTY_FUNCTION__)); | ||||
10182 | EnterTemplatedContext(InnermostTemplateScope, LookupDC); | ||||
10183 | } | ||||
10184 | |||||
10185 | return Count; | ||||
10186 | } | ||||
10187 | |||||
10188 | void Sema::ActOnStartDelayedMemberDeclarations(Scope *S, Decl *RecordD) { | ||||
10189 | if (!RecordD) return; | ||||
10190 | AdjustDeclIfTemplate(RecordD); | ||||
10191 | CXXRecordDecl *Record = cast<CXXRecordDecl>(RecordD); | ||||
10192 | PushDeclContext(S, Record); | ||||
10193 | } | ||||
10194 | |||||
10195 | void Sema::ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *RecordD) { | ||||
10196 | if (!RecordD) return; | ||||
10197 | PopDeclContext(); | ||||
10198 | } | ||||
10199 | |||||
10200 | /// This is used to implement the constant expression evaluation part of the | ||||
10201 | /// attribute enable_if extension. There is nothing in standard C++ which would | ||||
10202 | /// require reentering parameters. | ||||
10203 | void Sema::ActOnReenterCXXMethodParameter(Scope *S, ParmVarDecl *Param) { | ||||
10204 | if (!Param) | ||||
10205 | return; | ||||
10206 | |||||
10207 | S->AddDecl(Param); | ||||
10208 | if (Param->getDeclName()) | ||||
10209 | IdResolver.AddDecl(Param); | ||||
10210 | } | ||||
10211 | |||||
10212 | /// ActOnStartDelayedCXXMethodDeclaration - We have completed | ||||
10213 | /// parsing a top-level (non-nested) C++ class, and we are now | ||||
10214 | /// parsing those parts of the given Method declaration that could | ||||
10215 | /// not be parsed earlier (C++ [class.mem]p2), such as default | ||||
10216 | /// arguments. This action should enter the scope of the given | ||||
10217 | /// Method declaration as if we had just parsed the qualified method | ||||
10218 | /// name. However, it should not bring the parameters into scope; | ||||
10219 | /// that will be performed by ActOnDelayedCXXMethodParameter. | ||||
10220 | void Sema::ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *MethodD) { | ||||
10221 | } | ||||
10222 | |||||
10223 | /// ActOnDelayedCXXMethodParameter - We've already started a delayed | ||||
10224 | /// C++ method declaration. We're (re-)introducing the given | ||||
10225 | /// function parameter into scope for use in parsing later parts of | ||||
10226 | /// the method declaration. For example, we could see an | ||||
10227 | /// ActOnParamDefaultArgument event for this parameter. | ||||
10228 | void Sema::ActOnDelayedCXXMethodParameter(Scope *S, Decl *ParamD) { | ||||
10229 | if (!ParamD) | ||||
10230 | return; | ||||
10231 | |||||
10232 | ParmVarDecl *Param = cast<ParmVarDecl>(ParamD); | ||||
10233 | |||||
10234 | S->AddDecl(Param); | ||||
10235 | if (Param->getDeclName()) | ||||
10236 | IdResolver.AddDecl(Param); | ||||
10237 | } | ||||
10238 | |||||
10239 | /// ActOnFinishDelayedCXXMethodDeclaration - We have finished | ||||
10240 | /// processing the delayed method declaration for Method. The method | ||||
10241 | /// declaration is now considered finished. There may be a separate | ||||
10242 | /// ActOnStartOfFunctionDef action later (not necessarily | ||||
10243 | /// immediately!) for this method, if it was also defined inside the | ||||
10244 | /// class body. | ||||
10245 | void Sema::ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *MethodD) { | ||||
10246 | if (!MethodD) | ||||
10247 | return; | ||||
10248 | |||||
10249 | AdjustDeclIfTemplate(MethodD); | ||||
10250 | |||||
10251 | FunctionDecl *Method = cast<FunctionDecl>(MethodD); | ||||
10252 | |||||
10253 | // Now that we have our default arguments, check the constructor | ||||
10254 | // again. It could produce additional diagnostics or affect whether | ||||
10255 | // the class has implicitly-declared destructors, among other | ||||
10256 | // things. | ||||
10257 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Method)) | ||||
10258 | CheckConstructor(Constructor); | ||||
10259 | |||||
10260 | // Check the default arguments, which we may have added. | ||||
10261 | if (!Method->isInvalidDecl()) | ||||
10262 | CheckCXXDefaultArguments(Method); | ||||
10263 | } | ||||
10264 | |||||
10265 | // Emit the given diagnostic for each non-address-space qualifier. | ||||
10266 | // Common part of CheckConstructorDeclarator and CheckDestructorDeclarator. | ||||
10267 | static void checkMethodTypeQualifiers(Sema &S, Declarator &D, unsigned DiagID) { | ||||
10268 | const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||
10269 | if (FTI.hasMethodTypeQualifiers() && !D.isInvalidType()) { | ||||
10270 | bool DiagOccured = false; | ||||
10271 | FTI.MethodQualifiers->forEachQualifier( | ||||
10272 | [DiagID, &S, &DiagOccured](DeclSpec::TQ, StringRef QualName, | ||||
10273 | SourceLocation SL) { | ||||
10274 | // This diagnostic should be emitted on any qualifier except an addr | ||||
10275 | // space qualifier. However, forEachQualifier currently doesn't visit | ||||
10276 | // addr space qualifiers, so there's no way to write this condition | ||||
10277 | // right now; we just diagnose on everything. | ||||
10278 | S.Diag(SL, DiagID) << QualName << SourceRange(SL); | ||||
10279 | DiagOccured = true; | ||||
10280 | }); | ||||
10281 | if (DiagOccured) | ||||
10282 | D.setInvalidType(); | ||||
10283 | } | ||||
10284 | } | ||||
10285 | |||||
10286 | /// CheckConstructorDeclarator - Called by ActOnDeclarator to check | ||||
10287 | /// the well-formedness of the constructor declarator @p D with type @p | ||||
10288 | /// R. If there are any errors in the declarator, this routine will | ||||
10289 | /// emit diagnostics and set the invalid bit to true. In any case, the type | ||||
10290 | /// will be updated to reflect a well-formed type for the constructor and | ||||
10291 | /// returned. | ||||
10292 | QualType Sema::CheckConstructorDeclarator(Declarator &D, QualType R, | ||||
10293 | StorageClass &SC) { | ||||
10294 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); | ||||
10295 | |||||
10296 | // C++ [class.ctor]p3: | ||||
10297 | // A constructor shall not be virtual (10.3) or static (9.4). A | ||||
10298 | // constructor can be invoked for a const, volatile or const | ||||
10299 | // volatile object. A constructor shall not be declared const, | ||||
10300 | // volatile, or const volatile (9.3.2). | ||||
10301 | if (isVirtual) { | ||||
10302 | if (!D.isInvalidType()) | ||||
10303 | Diag(D.getIdentifierLoc(), diag::err_constructor_cannot_be) | ||||
10304 | << "virtual" << SourceRange(D.getDeclSpec().getVirtualSpecLoc()) | ||||
10305 | << SourceRange(D.getIdentifierLoc()); | ||||
10306 | D.setInvalidType(); | ||||
10307 | } | ||||
10308 | if (SC == SC_Static) { | ||||
10309 | if (!D.isInvalidType()) | ||||
10310 | Diag(D.getIdentifierLoc(), diag::err_constructor_cannot_be) | ||||
10311 | << "static" << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||
10312 | << SourceRange(D.getIdentifierLoc()); | ||||
10313 | D.setInvalidType(); | ||||
10314 | SC = SC_None; | ||||
10315 | } | ||||
10316 | |||||
10317 | if (unsigned TypeQuals = D.getDeclSpec().getTypeQualifiers()) { | ||||
10318 | diagnoseIgnoredQualifiers( | ||||
10319 | diag::err_constructor_return_type, TypeQuals, SourceLocation(), | ||||
10320 | D.getDeclSpec().getConstSpecLoc(), D.getDeclSpec().getVolatileSpecLoc(), | ||||
10321 | D.getDeclSpec().getRestrictSpecLoc(), | ||||
10322 | D.getDeclSpec().getAtomicSpecLoc()); | ||||
10323 | D.setInvalidType(); | ||||
10324 | } | ||||
10325 | |||||
10326 | checkMethodTypeQualifiers(*this, D, diag::err_invalid_qualified_constructor); | ||||
10327 | |||||
10328 | // C++0x [class.ctor]p4: | ||||
10329 | // A constructor shall not be declared with a ref-qualifier. | ||||
10330 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||
10331 | if (FTI.hasRefQualifier()) { | ||||
10332 | Diag(FTI.getRefQualifierLoc(), diag::err_ref_qualifier_constructor) | ||||
10333 | << FTI.RefQualifierIsLValueRef | ||||
10334 | << FixItHint::CreateRemoval(FTI.getRefQualifierLoc()); | ||||
10335 | D.setInvalidType(); | ||||
10336 | } | ||||
10337 | |||||
10338 | // Rebuild the function type "R" without any type qualifiers (in | ||||
10339 | // case any of the errors above fired) and with "void" as the | ||||
10340 | // return type, since constructors don't have return types. | ||||
10341 | const FunctionProtoType *Proto = R->castAs<FunctionProtoType>(); | ||||
10342 | if (Proto->getReturnType() == Context.VoidTy && !D.isInvalidType()) | ||||
10343 | return R; | ||||
10344 | |||||
10345 | FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo(); | ||||
10346 | EPI.TypeQuals = Qualifiers(); | ||||
10347 | EPI.RefQualifier = RQ_None; | ||||
10348 | |||||
10349 | return Context.getFunctionType(Context.VoidTy, Proto->getParamTypes(), EPI); | ||||
10350 | } | ||||
10351 | |||||
10352 | /// CheckConstructor - Checks a fully-formed constructor for | ||||
10353 | /// well-formedness, issuing any diagnostics required. Returns true if | ||||
10354 | /// the constructor declarator is invalid. | ||||
10355 | void Sema::CheckConstructor(CXXConstructorDecl *Constructor) { | ||||
10356 | CXXRecordDecl *ClassDecl | ||||
10357 | = dyn_cast<CXXRecordDecl>(Constructor->getDeclContext()); | ||||
10358 | if (!ClassDecl) | ||||
10359 | return Constructor->setInvalidDecl(); | ||||
10360 | |||||
10361 | // C++ [class.copy]p3: | ||||
10362 | // A declaration of a constructor for a class X is ill-formed if | ||||
10363 | // its first parameter is of type (optionally cv-qualified) X and | ||||
10364 | // either there are no other parameters or else all other | ||||
10365 | // parameters have default arguments. | ||||
10366 | if (!Constructor->isInvalidDecl() && | ||||
10367 | Constructor->hasOneParamOrDefaultArgs() && | ||||
10368 | Constructor->getTemplateSpecializationKind() != | ||||
10369 | TSK_ImplicitInstantiation) { | ||||
10370 | QualType ParamType = Constructor->getParamDecl(0)->getType(); | ||||
10371 | QualType ClassTy = Context.getTagDeclType(ClassDecl); | ||||
10372 | if (Context.getCanonicalType(ParamType).getUnqualifiedType() == ClassTy) { | ||||
10373 | SourceLocation ParamLoc = Constructor->getParamDecl(0)->getLocation(); | ||||
10374 | const char *ConstRef | ||||
10375 | = Constructor->getParamDecl(0)->getIdentifier() ? "const &" | ||||
10376 | : " const &"; | ||||
10377 | Diag(ParamLoc, diag::err_constructor_byvalue_arg) | ||||
10378 | << FixItHint::CreateInsertion(ParamLoc, ConstRef); | ||||
10379 | |||||
10380 | // FIXME: Rather that making the constructor invalid, we should endeavor | ||||
10381 | // to fix the type. | ||||
10382 | Constructor->setInvalidDecl(); | ||||
10383 | } | ||||
10384 | } | ||||
10385 | } | ||||
10386 | |||||
10387 | /// CheckDestructor - Checks a fully-formed destructor definition for | ||||
10388 | /// well-formedness, issuing any diagnostics required. Returns true | ||||
10389 | /// on error. | ||||
10390 | bool Sema::CheckDestructor(CXXDestructorDecl *Destructor) { | ||||
10391 | CXXRecordDecl *RD = Destructor->getParent(); | ||||
10392 | |||||
10393 | if (!Destructor->getOperatorDelete() && Destructor->isVirtual()) { | ||||
10394 | SourceLocation Loc; | ||||
10395 | |||||
10396 | if (!Destructor->isImplicit()) | ||||
10397 | Loc = Destructor->getLocation(); | ||||
10398 | else | ||||
10399 | Loc = RD->getLocation(); | ||||
10400 | |||||
10401 | // If we have a virtual destructor, look up the deallocation function | ||||
10402 | if (FunctionDecl *OperatorDelete = | ||||
10403 | FindDeallocationFunctionForDestructor(Loc, RD)) { | ||||
10404 | Expr *ThisArg = nullptr; | ||||
10405 | |||||
10406 | // If the notional 'delete this' expression requires a non-trivial | ||||
10407 | // conversion from 'this' to the type of a destroying operator delete's | ||||
10408 | // first parameter, perform that conversion now. | ||||
10409 | if (OperatorDelete->isDestroyingOperatorDelete()) { | ||||
10410 | QualType ParamType = OperatorDelete->getParamDecl(0)->getType(); | ||||
10411 | if (!declaresSameEntity(ParamType->getAsCXXRecordDecl(), RD)) { | ||||
10412 | // C++ [class.dtor]p13: | ||||
10413 | // ... as if for the expression 'delete this' appearing in a | ||||
10414 | // non-virtual destructor of the destructor's class. | ||||
10415 | ContextRAII SwitchContext(*this, Destructor); | ||||
10416 | ExprResult This = | ||||
10417 | ActOnCXXThis(OperatorDelete->getParamDecl(0)->getLocation()); | ||||
10418 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 10418, __extension__ __PRETTY_FUNCTION__)); | ||||
10419 | This = PerformImplicitConversion(This.get(), ParamType, AA_Passing); | ||||
10420 | if (This.isInvalid()) { | ||||
10421 | // FIXME: Register this as a context note so that it comes out | ||||
10422 | // in the right order. | ||||
10423 | Diag(Loc, diag::note_implicit_delete_this_in_destructor_here); | ||||
10424 | return true; | ||||
10425 | } | ||||
10426 | ThisArg = This.get(); | ||||
10427 | } | ||||
10428 | } | ||||
10429 | |||||
10430 | DiagnoseUseOfDecl(OperatorDelete, Loc); | ||||
10431 | MarkFunctionReferenced(Loc, OperatorDelete); | ||||
10432 | Destructor->setOperatorDelete(OperatorDelete, ThisArg); | ||||
10433 | } | ||||
10434 | } | ||||
10435 | |||||
10436 | return false; | ||||
10437 | } | ||||
10438 | |||||
10439 | /// CheckDestructorDeclarator - Called by ActOnDeclarator to check | ||||
10440 | /// the well-formednes of the destructor declarator @p D with type @p | ||||
10441 | /// R. If there are any errors in the declarator, this routine will | ||||
10442 | /// emit diagnostics and set the declarator to invalid. Even if this happens, | ||||
10443 | /// will be updated to reflect a well-formed type for the destructor and | ||||
10444 | /// returned. | ||||
10445 | QualType Sema::CheckDestructorDeclarator(Declarator &D, QualType R, | ||||
10446 | StorageClass& SC) { | ||||
10447 | // C++ [class.dtor]p1: | ||||
10448 | // [...] A typedef-name that names a class is a class-name | ||||
10449 | // (7.1.3); however, a typedef-name that names a class shall not | ||||
10450 | // be used as the identifier in the declarator for a destructor | ||||
10451 | // declaration. | ||||
10452 | QualType DeclaratorType = GetTypeFromParser(D.getName().DestructorName); | ||||
10453 | if (const TypedefType *TT = DeclaratorType->getAs<TypedefType>()) | ||||
10454 | Diag(D.getIdentifierLoc(), diag::ext_destructor_typedef_name) | ||||
10455 | << DeclaratorType << isa<TypeAliasDecl>(TT->getDecl()); | ||||
10456 | else if (const TemplateSpecializationType *TST = | ||||
10457 | DeclaratorType->getAs<TemplateSpecializationType>()) | ||||
10458 | if (TST->isTypeAlias()) | ||||
10459 | Diag(D.getIdentifierLoc(), diag::ext_destructor_typedef_name) | ||||
10460 | << DeclaratorType << 1; | ||||
10461 | |||||
10462 | // C++ [class.dtor]p2: | ||||
10463 | // A destructor is used to destroy objects of its class type. A | ||||
10464 | // destructor takes no parameters, and no return type can be | ||||
10465 | // specified for it (not even void). The address of a destructor | ||||
10466 | // shall not be taken. A destructor shall not be static. A | ||||
10467 | // destructor can be invoked for a const, volatile or const | ||||
10468 | // volatile object. A destructor shall not be declared const, | ||||
10469 | // volatile or const volatile (9.3.2). | ||||
10470 | if (SC == SC_Static) { | ||||
10471 | if (!D.isInvalidType()) | ||||
10472 | Diag(D.getIdentifierLoc(), diag::err_destructor_cannot_be) | ||||
10473 | << "static" << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||
10474 | << SourceRange(D.getIdentifierLoc()) | ||||
10475 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||
10476 | |||||
10477 | SC = SC_None; | ||||
10478 | } | ||||
10479 | if (!D.isInvalidType()) { | ||||
10480 | // Destructors don't have return types, but the parser will | ||||
10481 | // happily parse something like: | ||||
10482 | // | ||||
10483 | // class X { | ||||
10484 | // float ~X(); | ||||
10485 | // }; | ||||
10486 | // | ||||
10487 | // The return type will be eliminated later. | ||||
10488 | if (D.getDeclSpec().hasTypeSpecifier()) | ||||
10489 | Diag(D.getIdentifierLoc(), diag::err_destructor_return_type) | ||||
10490 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) | ||||
10491 | << SourceRange(D.getIdentifierLoc()); | ||||
10492 | else if (unsigned TypeQuals = D.getDeclSpec().getTypeQualifiers()) { | ||||
10493 | diagnoseIgnoredQualifiers(diag::err_destructor_return_type, TypeQuals, | ||||
10494 | SourceLocation(), | ||||
10495 | D.getDeclSpec().getConstSpecLoc(), | ||||
10496 | D.getDeclSpec().getVolatileSpecLoc(), | ||||
10497 | D.getDeclSpec().getRestrictSpecLoc(), | ||||
10498 | D.getDeclSpec().getAtomicSpecLoc()); | ||||
10499 | D.setInvalidType(); | ||||
10500 | } | ||||
10501 | } | ||||
10502 | |||||
10503 | checkMethodTypeQualifiers(*this, D, diag::err_invalid_qualified_destructor); | ||||
10504 | |||||
10505 | // C++0x [class.dtor]p2: | ||||
10506 | // A destructor shall not be declared with a ref-qualifier. | ||||
10507 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||
10508 | if (FTI.hasRefQualifier()) { | ||||
10509 | Diag(FTI.getRefQualifierLoc(), diag::err_ref_qualifier_destructor) | ||||
10510 | << FTI.RefQualifierIsLValueRef | ||||
10511 | << FixItHint::CreateRemoval(FTI.getRefQualifierLoc()); | ||||
10512 | D.setInvalidType(); | ||||
10513 | } | ||||
10514 | |||||
10515 | // Make sure we don't have any parameters. | ||||
10516 | if (FTIHasNonVoidParameters(FTI)) { | ||||
10517 | Diag(D.getIdentifierLoc(), diag::err_destructor_with_params); | ||||
10518 | |||||
10519 | // Delete the parameters. | ||||
10520 | FTI.freeParams(); | ||||
10521 | D.setInvalidType(); | ||||
10522 | } | ||||
10523 | |||||
10524 | // Make sure the destructor isn't variadic. | ||||
10525 | if (FTI.isVariadic) { | ||||
10526 | Diag(D.getIdentifierLoc(), diag::err_destructor_variadic); | ||||
10527 | D.setInvalidType(); | ||||
10528 | } | ||||
10529 | |||||
10530 | // Rebuild the function type "R" without any type qualifiers or | ||||
10531 | // parameters (in case any of the errors above fired) and with | ||||
10532 | // "void" as the return type, since destructors don't have return | ||||
10533 | // types. | ||||
10534 | if (!D.isInvalidType()) | ||||
10535 | return R; | ||||
10536 | |||||
10537 | const FunctionProtoType *Proto = R->castAs<FunctionProtoType>(); | ||||
10538 | FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo(); | ||||
10539 | EPI.Variadic = false; | ||||
10540 | EPI.TypeQuals = Qualifiers(); | ||||
10541 | EPI.RefQualifier = RQ_None; | ||||
10542 | return Context.getFunctionType(Context.VoidTy, None, EPI); | ||||
10543 | } | ||||
10544 | |||||
10545 | static void extendLeft(SourceRange &R, SourceRange Before) { | ||||
10546 | if (Before.isInvalid()) | ||||
10547 | return; | ||||
10548 | R.setBegin(Before.getBegin()); | ||||
10549 | if (R.getEnd().isInvalid()) | ||||
10550 | R.setEnd(Before.getEnd()); | ||||
10551 | } | ||||
10552 | |||||
10553 | static void extendRight(SourceRange &R, SourceRange After) { | ||||
10554 | if (After.isInvalid()) | ||||
10555 | return; | ||||
10556 | if (R.getBegin().isInvalid()) | ||||
10557 | R.setBegin(After.getBegin()); | ||||
10558 | R.setEnd(After.getEnd()); | ||||
10559 | } | ||||
10560 | |||||
10561 | /// CheckConversionDeclarator - Called by ActOnDeclarator to check the | ||||
10562 | /// well-formednes of the conversion function declarator @p D with | ||||
10563 | /// type @p R. If there are any errors in the declarator, this routine | ||||
10564 | /// will emit diagnostics and return true. Otherwise, it will return | ||||
10565 | /// false. Either way, the type @p R will be updated to reflect a | ||||
10566 | /// well-formed type for the conversion operator. | ||||
10567 | void Sema::CheckConversionDeclarator(Declarator &D, QualType &R, | ||||
10568 | StorageClass& SC) { | ||||
10569 | // C++ [class.conv.fct]p1: | ||||
10570 | // Neither parameter types nor return type can be specified. The | ||||
10571 | // type of a conversion function (8.3.5) is "function taking no | ||||
10572 | // parameter returning conversion-type-id." | ||||
10573 | if (SC == SC_Static) { | ||||
10574 | if (!D.isInvalidType()) | ||||
10575 | Diag(D.getIdentifierLoc(), diag::err_conv_function_not_member) | ||||
10576 | << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||
10577 | << D.getName().getSourceRange(); | ||||
10578 | D.setInvalidType(); | ||||
10579 | SC = SC_None; | ||||
10580 | } | ||||
10581 | |||||
10582 | TypeSourceInfo *ConvTSI = nullptr; | ||||
10583 | QualType ConvType = | ||||
10584 | GetTypeFromParser(D.getName().ConversionFunctionId, &ConvTSI); | ||||
10585 | |||||
10586 | const DeclSpec &DS = D.getDeclSpec(); | ||||
10587 | if (DS.hasTypeSpecifier() && !D.isInvalidType()) { | ||||
10588 | // Conversion functions don't have return types, but the parser will | ||||
10589 | // happily parse something like: | ||||
10590 | // | ||||
10591 | // class X { | ||||
10592 | // float operator bool(); | ||||
10593 | // }; | ||||
10594 | // | ||||
10595 | // The return type will be changed later anyway. | ||||
10596 | Diag(D.getIdentifierLoc(), diag::err_conv_function_return_type) | ||||
10597 | << SourceRange(DS.getTypeSpecTypeLoc()) | ||||
10598 | << SourceRange(D.getIdentifierLoc()); | ||||
10599 | D.setInvalidType(); | ||||
10600 | } else if (DS.getTypeQualifiers() && !D.isInvalidType()) { | ||||
10601 | // It's also plausible that the user writes type qualifiers in the wrong | ||||
10602 | // place, such as: | ||||
10603 | // struct S { const operator int(); }; | ||||
10604 | // FIXME: we could provide a fixit to move the qualifiers onto the | ||||
10605 | // conversion type. | ||||
10606 | Diag(D.getIdentifierLoc(), diag::err_conv_function_with_complex_decl) | ||||
10607 | << SourceRange(D.getIdentifierLoc()) << 0; | ||||
10608 | D.setInvalidType(); | ||||
10609 | } | ||||
10610 | |||||
10611 | const auto *Proto = R->castAs<FunctionProtoType>(); | ||||
10612 | |||||
10613 | // Make sure we don't have any parameters. | ||||
10614 | if (Proto->getNumParams() > 0) { | ||||
10615 | Diag(D.getIdentifierLoc(), diag::err_conv_function_with_params); | ||||
10616 | |||||
10617 | // Delete the parameters. | ||||
10618 | D.getFunctionTypeInfo().freeParams(); | ||||
10619 | D.setInvalidType(); | ||||
10620 | } else if (Proto->isVariadic()) { | ||||
10621 | Diag(D.getIdentifierLoc(), diag::err_conv_function_variadic); | ||||
10622 | D.setInvalidType(); | ||||
10623 | } | ||||
10624 | |||||
10625 | // Diagnose "&operator bool()" and other such nonsense. This | ||||
10626 | // is actually a gcc extension which we don't support. | ||||
10627 | if (Proto->getReturnType() != ConvType) { | ||||
10628 | bool NeedsTypedef = false; | ||||
10629 | SourceRange Before, After; | ||||
10630 | |||||
10631 | // Walk the chunks and extract information on them for our diagnostic. | ||||
10632 | bool PastFunctionChunk = false; | ||||
10633 | for (auto &Chunk : D.type_objects()) { | ||||
10634 | switch (Chunk.Kind) { | ||||
10635 | case DeclaratorChunk::Function: | ||||
10636 | if (!PastFunctionChunk) { | ||||
10637 | if (Chunk.Fun.HasTrailingReturnType) { | ||||
10638 | TypeSourceInfo *TRT = nullptr; | ||||
10639 | GetTypeFromParser(Chunk.Fun.getTrailingReturnType(), &TRT); | ||||
10640 | if (TRT) extendRight(After, TRT->getTypeLoc().getSourceRange()); | ||||
10641 | } | ||||
10642 | PastFunctionChunk = true; | ||||
10643 | break; | ||||
10644 | } | ||||
10645 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
10646 | case DeclaratorChunk::Array: | ||||
10647 | NeedsTypedef = true; | ||||
10648 | extendRight(After, Chunk.getSourceRange()); | ||||
10649 | break; | ||||
10650 | |||||
10651 | case DeclaratorChunk::Pointer: | ||||
10652 | case DeclaratorChunk::BlockPointer: | ||||
10653 | case DeclaratorChunk::Reference: | ||||
10654 | case DeclaratorChunk::MemberPointer: | ||||
10655 | case DeclaratorChunk::Pipe: | ||||
10656 | extendLeft(Before, Chunk.getSourceRange()); | ||||
10657 | break; | ||||
10658 | |||||
10659 | case DeclaratorChunk::Paren: | ||||
10660 | extendLeft(Before, Chunk.Loc); | ||||
10661 | extendRight(After, Chunk.EndLoc); | ||||
10662 | break; | ||||
10663 | } | ||||
10664 | } | ||||
10665 | |||||
10666 | SourceLocation Loc = Before.isValid() ? Before.getBegin() : | ||||
10667 | After.isValid() ? After.getBegin() : | ||||
10668 | D.getIdentifierLoc(); | ||||
10669 | auto &&DB = Diag(Loc, diag::err_conv_function_with_complex_decl); | ||||
10670 | DB << Before << After; | ||||
10671 | |||||
10672 | if (!NeedsTypedef) { | ||||
10673 | DB << /*don't need a typedef*/0; | ||||
10674 | |||||
10675 | // If we can provide a correct fix-it hint, do so. | ||||
10676 | if (After.isInvalid() && ConvTSI) { | ||||
10677 | SourceLocation InsertLoc = | ||||
10678 | getLocForEndOfToken(ConvTSI->getTypeLoc().getEndLoc()); | ||||
10679 | DB << FixItHint::CreateInsertion(InsertLoc, " ") | ||||
10680 | << FixItHint::CreateInsertionFromRange( | ||||
10681 | InsertLoc, CharSourceRange::getTokenRange(Before)) | ||||
10682 | << FixItHint::CreateRemoval(Before); | ||||
10683 | } | ||||
10684 | } else if (!Proto->getReturnType()->isDependentType()) { | ||||
10685 | DB << /*typedef*/1 << Proto->getReturnType(); | ||||
10686 | } else if (getLangOpts().CPlusPlus11) { | ||||
10687 | DB << /*alias template*/2 << Proto->getReturnType(); | ||||
10688 | } else { | ||||
10689 | DB << /*might not be fixable*/3; | ||||
10690 | } | ||||
10691 | |||||
10692 | // Recover by incorporating the other type chunks into the result type. | ||||
10693 | // Note, this does *not* change the name of the function. This is compatible | ||||
10694 | // with the GCC extension: | ||||
10695 | // struct S { &operator int(); } s; | ||||
10696 | // int &r = s.operator int(); // ok in GCC | ||||
10697 | // S::operator int&() {} // error in GCC, function name is 'operator int'. | ||||
10698 | ConvType = Proto->getReturnType(); | ||||
10699 | } | ||||
10700 | |||||
10701 | // C++ [class.conv.fct]p4: | ||||
10702 | // The conversion-type-id shall not represent a function type nor | ||||
10703 | // an array type. | ||||
10704 | if (ConvType->isArrayType()) { | ||||
10705 | Diag(D.getIdentifierLoc(), diag::err_conv_function_to_array); | ||||
10706 | ConvType = Context.getPointerType(ConvType); | ||||
10707 | D.setInvalidType(); | ||||
10708 | } else if (ConvType->isFunctionType()) { | ||||
10709 | Diag(D.getIdentifierLoc(), diag::err_conv_function_to_function); | ||||
10710 | ConvType = Context.getPointerType(ConvType); | ||||
10711 | D.setInvalidType(); | ||||
10712 | } | ||||
10713 | |||||
10714 | // Rebuild the function type "R" without any parameters (in case any | ||||
10715 | // of the errors above fired) and with the conversion type as the | ||||
10716 | // return type. | ||||
10717 | if (D.isInvalidType()) | ||||
10718 | R = Context.getFunctionType(ConvType, None, Proto->getExtProtoInfo()); | ||||
10719 | |||||
10720 | // C++0x explicit conversion operators. | ||||
10721 | if (DS.hasExplicitSpecifier() && !getLangOpts().CPlusPlus20) | ||||
10722 | Diag(DS.getExplicitSpecLoc(), | ||||
10723 | getLangOpts().CPlusPlus11 | ||||
10724 | ? diag::warn_cxx98_compat_explicit_conversion_functions | ||||
10725 | : diag::ext_explicit_conversion_functions) | ||||
10726 | << SourceRange(DS.getExplicitSpecRange()); | ||||
10727 | } | ||||
10728 | |||||
10729 | /// ActOnConversionDeclarator - Called by ActOnDeclarator to complete | ||||
10730 | /// the declaration of the given C++ conversion function. This routine | ||||
10731 | /// is responsible for recording the conversion function in the C++ | ||||
10732 | /// class, if possible. | ||||
10733 | Decl *Sema::ActOnConversionDeclarator(CXXConversionDecl *Conversion) { | ||||
10734 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 10734, __extension__ __PRETTY_FUNCTION__)); | ||||
10735 | |||||
10736 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(Conversion->getDeclContext()); | ||||
10737 | |||||
10738 | // Make sure we aren't redeclaring the conversion function. | ||||
10739 | QualType ConvType = Context.getCanonicalType(Conversion->getConversionType()); | ||||
10740 | // C++ [class.conv.fct]p1: | ||||
10741 | // [...] A conversion function is never used to convert a | ||||
10742 | // (possibly cv-qualified) object to the (possibly cv-qualified) | ||||
10743 | // same object type (or a reference to it), to a (possibly | ||||
10744 | // cv-qualified) base class of that type (or a reference to it), | ||||
10745 | // or to (possibly cv-qualified) void. | ||||
10746 | QualType ClassType | ||||
10747 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||
10748 | if (const ReferenceType *ConvTypeRef = ConvType->getAs<ReferenceType>()) | ||||
10749 | ConvType = ConvTypeRef->getPointeeType(); | ||||
10750 | if (Conversion->getTemplateSpecializationKind() != TSK_Undeclared && | ||||
10751 | Conversion->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) | ||||
10752 | /* Suppress diagnostics for instantiations. */; | ||||
10753 | else if (Conversion->size_overridden_methods() != 0) | ||||
10754 | /* Suppress diagnostics for overriding virtual function in a base class. */; | ||||
10755 | else if (ConvType->isRecordType()) { | ||||
10756 | ConvType = Context.getCanonicalType(ConvType).getUnqualifiedType(); | ||||
10757 | if (ConvType == ClassType) | ||||
10758 | Diag(Conversion->getLocation(), diag::warn_conv_to_self_not_used) | ||||
10759 | << ClassType; | ||||
10760 | else if (IsDerivedFrom(Conversion->getLocation(), ClassType, ConvType)) | ||||
10761 | Diag(Conversion->getLocation(), diag::warn_conv_to_base_not_used) | ||||
10762 | << ClassType << ConvType; | ||||
10763 | } else if (ConvType->isVoidType()) { | ||||
10764 | Diag(Conversion->getLocation(), diag::warn_conv_to_void_not_used) | ||||
10765 | << ClassType << ConvType; | ||||
10766 | } | ||||
10767 | |||||
10768 | if (FunctionTemplateDecl *ConversionTemplate | ||||
10769 | = Conversion->getDescribedFunctionTemplate()) | ||||
10770 | return ConversionTemplate; | ||||
10771 | |||||
10772 | return Conversion; | ||||
10773 | } | ||||
10774 | |||||
10775 | namespace { | ||||
10776 | /// Utility class to accumulate and print a diagnostic listing the invalid | ||||
10777 | /// specifier(s) on a declaration. | ||||
10778 | struct BadSpecifierDiagnoser { | ||||
10779 | BadSpecifierDiagnoser(Sema &S, SourceLocation Loc, unsigned DiagID) | ||||
10780 | : S(S), Diagnostic(S.Diag(Loc, DiagID)) {} | ||||
10781 | ~BadSpecifierDiagnoser() { | ||||
10782 | Diagnostic << Specifiers; | ||||
10783 | } | ||||
10784 | |||||
10785 | template<typename T> void check(SourceLocation SpecLoc, T Spec) { | ||||
10786 | return check(SpecLoc, DeclSpec::getSpecifierName(Spec)); | ||||
10787 | } | ||||
10788 | void check(SourceLocation SpecLoc, DeclSpec::TST Spec) { | ||||
10789 | return check(SpecLoc, | ||||
10790 | DeclSpec::getSpecifierName(Spec, S.getPrintingPolicy())); | ||||
10791 | } | ||||
10792 | void check(SourceLocation SpecLoc, const char *Spec) { | ||||
10793 | if (SpecLoc.isInvalid()) return; | ||||
10794 | Diagnostic << SourceRange(SpecLoc, SpecLoc); | ||||
10795 | if (!Specifiers.empty()) Specifiers += " "; | ||||
10796 | Specifiers += Spec; | ||||
10797 | } | ||||
10798 | |||||
10799 | Sema &S; | ||||
10800 | Sema::SemaDiagnosticBuilder Diagnostic; | ||||
10801 | std::string Specifiers; | ||||
10802 | }; | ||||
10803 | } | ||||
10804 | |||||
10805 | /// Check the validity of a declarator that we parsed for a deduction-guide. | ||||
10806 | /// These aren't actually declarators in the grammar, so we need to check that | ||||
10807 | /// the user didn't specify any pieces that are not part of the deduction-guide | ||||
10808 | /// grammar. | ||||
10809 | void Sema::CheckDeductionGuideDeclarator(Declarator &D, QualType &R, | ||||
10810 | StorageClass &SC) { | ||||
10811 | TemplateName GuidedTemplate = D.getName().TemplateName.get().get(); | ||||
10812 | TemplateDecl *GuidedTemplateDecl = GuidedTemplate.getAsTemplateDecl(); | ||||
10813 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 10813, __extension__ __PRETTY_FUNCTION__)); | ||||
10814 | |||||
10815 | // C++ [temp.deduct.guide]p3: | ||||
10816 | // A deduction-gide shall be declared in the same scope as the | ||||
10817 | // corresponding class template. | ||||
10818 | if (!CurContext->getRedeclContext()->Equals( | ||||
10819 | GuidedTemplateDecl->getDeclContext()->getRedeclContext())) { | ||||
10820 | Diag(D.getIdentifierLoc(), diag::err_deduction_guide_wrong_scope) | ||||
10821 | << GuidedTemplateDecl; | ||||
10822 | Diag(GuidedTemplateDecl->getLocation(), diag::note_template_decl_here); | ||||
10823 | } | ||||
10824 | |||||
10825 | auto &DS = D.getMutableDeclSpec(); | ||||
10826 | // We leave 'friend' and 'virtual' to be rejected in the normal way. | ||||
10827 | if (DS.hasTypeSpecifier() || DS.getTypeQualifiers() || | ||||
10828 | DS.getStorageClassSpecLoc().isValid() || DS.isInlineSpecified() || | ||||
10829 | DS.isNoreturnSpecified() || DS.hasConstexprSpecifier()) { | ||||
10830 | BadSpecifierDiagnoser Diagnoser( | ||||
10831 | *this, D.getIdentifierLoc(), | ||||
10832 | diag::err_deduction_guide_invalid_specifier); | ||||
10833 | |||||
10834 | Diagnoser.check(DS.getStorageClassSpecLoc(), DS.getStorageClassSpec()); | ||||
10835 | DS.ClearStorageClassSpecs(); | ||||
10836 | SC = SC_None; | ||||
10837 | |||||
10838 | // 'explicit' is permitted. | ||||
10839 | Diagnoser.check(DS.getInlineSpecLoc(), "inline"); | ||||
10840 | Diagnoser.check(DS.getNoreturnSpecLoc(), "_Noreturn"); | ||||
10841 | Diagnoser.check(DS.getConstexprSpecLoc(), "constexpr"); | ||||
10842 | DS.ClearConstexprSpec(); | ||||
10843 | |||||
10844 | Diagnoser.check(DS.getConstSpecLoc(), "const"); | ||||
10845 | Diagnoser.check(DS.getRestrictSpecLoc(), "__restrict"); | ||||
10846 | Diagnoser.check(DS.getVolatileSpecLoc(), "volatile"); | ||||
10847 | Diagnoser.check(DS.getAtomicSpecLoc(), "_Atomic"); | ||||
10848 | Diagnoser.check(DS.getUnalignedSpecLoc(), "__unaligned"); | ||||
10849 | DS.ClearTypeQualifiers(); | ||||
10850 | |||||
10851 | Diagnoser.check(DS.getTypeSpecComplexLoc(), DS.getTypeSpecComplex()); | ||||
10852 | Diagnoser.check(DS.getTypeSpecSignLoc(), DS.getTypeSpecSign()); | ||||
10853 | Diagnoser.check(DS.getTypeSpecWidthLoc(), DS.getTypeSpecWidth()); | ||||
10854 | Diagnoser.check(DS.getTypeSpecTypeLoc(), DS.getTypeSpecType()); | ||||
10855 | DS.ClearTypeSpecType(); | ||||
10856 | } | ||||
10857 | |||||
10858 | if (D.isInvalidType()) | ||||
10859 | return; | ||||
10860 | |||||
10861 | // Check the declarator is simple enough. | ||||
10862 | bool FoundFunction = false; | ||||
10863 | for (const DeclaratorChunk &Chunk : llvm::reverse(D.type_objects())) { | ||||
10864 | if (Chunk.Kind == DeclaratorChunk::Paren) | ||||
10865 | continue; | ||||
10866 | if (Chunk.Kind != DeclaratorChunk::Function || FoundFunction) { | ||||
10867 | Diag(D.getDeclSpec().getBeginLoc(), | ||||
10868 | diag::err_deduction_guide_with_complex_decl) | ||||
10869 | << D.getSourceRange(); | ||||
10870 | break; | ||||
10871 | } | ||||
10872 | if (!Chunk.Fun.hasTrailingReturnType()) { | ||||
10873 | Diag(D.getName().getBeginLoc(), | ||||
10874 | diag::err_deduction_guide_no_trailing_return_type); | ||||
10875 | break; | ||||
10876 | } | ||||
10877 | |||||
10878 | // Check that the return type is written as a specialization of | ||||
10879 | // the template specified as the deduction-guide's name. | ||||
10880 | ParsedType TrailingReturnType = Chunk.Fun.getTrailingReturnType(); | ||||
10881 | TypeSourceInfo *TSI = nullptr; | ||||
10882 | QualType RetTy = GetTypeFromParser(TrailingReturnType, &TSI); | ||||
10883 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 10883, __extension__ __PRETTY_FUNCTION__)); | ||||
10884 | bool AcceptableReturnType = false; | ||||
10885 | bool MightInstantiateToSpecialization = false; | ||||
10886 | if (auto RetTST = | ||||
10887 | TSI->getTypeLoc().getAs<TemplateSpecializationTypeLoc>()) { | ||||
10888 | TemplateName SpecifiedName = RetTST.getTypePtr()->getTemplateName(); | ||||
10889 | bool TemplateMatches = | ||||
10890 | Context.hasSameTemplateName(SpecifiedName, GuidedTemplate); | ||||
10891 | if (SpecifiedName.getKind() == TemplateName::Template && TemplateMatches) | ||||
10892 | AcceptableReturnType = true; | ||||
10893 | else { | ||||
10894 | // This could still instantiate to the right type, unless we know it | ||||
10895 | // names the wrong class template. | ||||
10896 | auto *TD = SpecifiedName.getAsTemplateDecl(); | ||||
10897 | MightInstantiateToSpecialization = !(TD && isa<ClassTemplateDecl>(TD) && | ||||
10898 | !TemplateMatches); | ||||
10899 | } | ||||
10900 | } else if (!RetTy.hasQualifiers() && RetTy->isDependentType()) { | ||||
10901 | MightInstantiateToSpecialization = true; | ||||
10902 | } | ||||
10903 | |||||
10904 | if (!AcceptableReturnType) { | ||||
10905 | Diag(TSI->getTypeLoc().getBeginLoc(), | ||||
10906 | diag::err_deduction_guide_bad_trailing_return_type) | ||||
10907 | << GuidedTemplate << TSI->getType() | ||||
10908 | << MightInstantiateToSpecialization | ||||
10909 | << TSI->getTypeLoc().getSourceRange(); | ||||
10910 | } | ||||
10911 | |||||
10912 | // Keep going to check that we don't have any inner declarator pieces (we | ||||
10913 | // could still have a function returning a pointer to a function). | ||||
10914 | FoundFunction = true; | ||||
10915 | } | ||||
10916 | |||||
10917 | if (D.isFunctionDefinition()) | ||||
10918 | Diag(D.getIdentifierLoc(), diag::err_deduction_guide_defines_function); | ||||
10919 | } | ||||
10920 | |||||
10921 | //===----------------------------------------------------------------------===// | ||||
10922 | // Namespace Handling | ||||
10923 | //===----------------------------------------------------------------------===// | ||||
10924 | |||||
10925 | /// Diagnose a mismatch in 'inline' qualifiers when a namespace is | ||||
10926 | /// reopened. | ||||
10927 | static void DiagnoseNamespaceInlineMismatch(Sema &S, SourceLocation KeywordLoc, | ||||
10928 | SourceLocation Loc, | ||||
10929 | IdentifierInfo *II, bool *IsInline, | ||||
10930 | NamespaceDecl *PrevNS) { | ||||
10931 | assert(*IsInline != PrevNS->isInline())(static_cast <bool> (*IsInline != PrevNS->isInline() ) ? void (0) : __assert_fail ("*IsInline != PrevNS->isInline()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 10931, __extension__ __PRETTY_FUNCTION__)); | ||||
10932 | |||||
10933 | if (PrevNS->isInline()) | ||||
10934 | // The user probably just forgot the 'inline', so suggest that it | ||||
10935 | // be added back. | ||||
10936 | S.Diag(Loc, diag::warn_inline_namespace_reopened_noninline) | ||||
10937 | << FixItHint::CreateInsertion(KeywordLoc, "inline "); | ||||
10938 | else | ||||
10939 | S.Diag(Loc, diag::err_inline_namespace_mismatch); | ||||
10940 | |||||
10941 | S.Diag(PrevNS->getLocation(), diag::note_previous_definition); | ||||
10942 | *IsInline = PrevNS->isInline(); | ||||
10943 | } | ||||
10944 | |||||
10945 | /// ActOnStartNamespaceDef - This is called at the start of a namespace | ||||
10946 | /// definition. | ||||
10947 | Decl *Sema::ActOnStartNamespaceDef( | ||||
10948 | Scope *NamespcScope, SourceLocation InlineLoc, SourceLocation NamespaceLoc, | ||||
10949 | SourceLocation IdentLoc, IdentifierInfo *II, SourceLocation LBrace, | ||||
10950 | const ParsedAttributesView &AttrList, UsingDirectiveDecl *&UD) { | ||||
10951 | SourceLocation StartLoc = InlineLoc.isValid() ? InlineLoc : NamespaceLoc; | ||||
10952 | // For anonymous namespace, take the location of the left brace. | ||||
10953 | SourceLocation Loc = II ? IdentLoc : LBrace; | ||||
10954 | bool IsInline = InlineLoc.isValid(); | ||||
10955 | bool IsInvalid = false; | ||||
10956 | bool IsStd = false; | ||||
10957 | bool AddToKnown = false; | ||||
10958 | Scope *DeclRegionScope = NamespcScope->getParent(); | ||||
10959 | |||||
10960 | NamespaceDecl *PrevNS = nullptr; | ||||
10961 | if (II) { | ||||
10962 | // C++ [namespace.def]p2: | ||||
10963 | // The identifier in an original-namespace-definition shall not | ||||
10964 | // have been previously defined in the declarative region in | ||||
10965 | // which the original-namespace-definition appears. The | ||||
10966 | // identifier in an original-namespace-definition is the name of | ||||
10967 | // the namespace. Subsequently in that declarative region, it is | ||||
10968 | // treated as an original-namespace-name. | ||||
10969 | // | ||||
10970 | // Since namespace names are unique in their scope, and we don't | ||||
10971 | // look through using directives, just look for any ordinary names | ||||
10972 | // as if by qualified name lookup. | ||||
10973 | LookupResult R(*this, II, IdentLoc, LookupOrdinaryName, | ||||
10974 | ForExternalRedeclaration); | ||||
10975 | LookupQualifiedName(R, CurContext->getRedeclContext()); | ||||
10976 | NamedDecl *PrevDecl = | ||||
10977 | R.isSingleResult() ? R.getRepresentativeDecl() : nullptr; | ||||
10978 | PrevNS = dyn_cast_or_null<NamespaceDecl>(PrevDecl); | ||||
10979 | |||||
10980 | if (PrevNS) { | ||||
10981 | // This is an extended namespace definition. | ||||
10982 | if (IsInline != PrevNS->isInline()) | ||||
10983 | DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, Loc, II, | ||||
10984 | &IsInline, PrevNS); | ||||
10985 | } else if (PrevDecl) { | ||||
10986 | // This is an invalid name redefinition. | ||||
10987 | Diag(Loc, diag::err_redefinition_different_kind) | ||||
10988 | << II; | ||||
10989 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||
10990 | IsInvalid = true; | ||||
10991 | // Continue on to push Namespc as current DeclContext and return it. | ||||
10992 | } else if (II->isStr("std") && | ||||
10993 | CurContext->getRedeclContext()->isTranslationUnit()) { | ||||
10994 | // This is the first "real" definition of the namespace "std", so update | ||||
10995 | // our cache of the "std" namespace to point at this definition. | ||||
10996 | PrevNS = getStdNamespace(); | ||||
10997 | IsStd = true; | ||||
10998 | AddToKnown = !IsInline; | ||||
10999 | } else { | ||||
11000 | // We've seen this namespace for the first time. | ||||
11001 | AddToKnown = !IsInline; | ||||
11002 | } | ||||
11003 | } else { | ||||
11004 | // Anonymous namespaces. | ||||
11005 | |||||
11006 | // Determine whether the parent already has an anonymous namespace. | ||||
11007 | DeclContext *Parent = CurContext->getRedeclContext(); | ||||
11008 | if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(Parent)) { | ||||
11009 | PrevNS = TU->getAnonymousNamespace(); | ||||
11010 | } else { | ||||
11011 | NamespaceDecl *ND = cast<NamespaceDecl>(Parent); | ||||
11012 | PrevNS = ND->getAnonymousNamespace(); | ||||
11013 | } | ||||
11014 | |||||
11015 | if (PrevNS && IsInline != PrevNS->isInline()) | ||||
11016 | DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, NamespaceLoc, II, | ||||
11017 | &IsInline, PrevNS); | ||||
11018 | } | ||||
11019 | |||||
11020 | NamespaceDecl *Namespc = NamespaceDecl::Create(Context, CurContext, IsInline, | ||||
11021 | StartLoc, Loc, II, PrevNS); | ||||
11022 | if (IsInvalid) | ||||
11023 | Namespc->setInvalidDecl(); | ||||
11024 | |||||
11025 | ProcessDeclAttributeList(DeclRegionScope, Namespc, AttrList); | ||||
11026 | AddPragmaAttributes(DeclRegionScope, Namespc); | ||||
11027 | |||||
11028 | // FIXME: Should we be merging attributes? | ||||
11029 | if (const VisibilityAttr *Attr = Namespc->getAttr<VisibilityAttr>()) | ||||
11030 | PushNamespaceVisibilityAttr(Attr, Loc); | ||||
11031 | |||||
11032 | if (IsStd) | ||||
11033 | StdNamespace = Namespc; | ||||
11034 | if (AddToKnown) | ||||
11035 | KnownNamespaces[Namespc] = false; | ||||
11036 | |||||
11037 | if (II) { | ||||
11038 | PushOnScopeChains(Namespc, DeclRegionScope); | ||||
11039 | } else { | ||||
11040 | // Link the anonymous namespace into its parent. | ||||
11041 | DeclContext *Parent = CurContext->getRedeclContext(); | ||||
11042 | if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(Parent)) { | ||||
11043 | TU->setAnonymousNamespace(Namespc); | ||||
11044 | } else { | ||||
11045 | cast<NamespaceDecl>(Parent)->setAnonymousNamespace(Namespc); | ||||
11046 | } | ||||
11047 | |||||
11048 | CurContext->addDecl(Namespc); | ||||
11049 | |||||
11050 | // C++ [namespace.unnamed]p1. An unnamed-namespace-definition | ||||
11051 | // behaves as if it were replaced by | ||||
11052 | // namespace unique { /* empty body */ } | ||||
11053 | // using namespace unique; | ||||
11054 | // namespace unique { namespace-body } | ||||
11055 | // where all occurrences of 'unique' in a translation unit are | ||||
11056 | // replaced by the same identifier and this identifier differs | ||||
11057 | // from all other identifiers in the entire program. | ||||
11058 | |||||
11059 | // We just create the namespace with an empty name and then add an | ||||
11060 | // implicit using declaration, just like the standard suggests. | ||||
11061 | // | ||||
11062 | // CodeGen enforces the "universally unique" aspect by giving all | ||||
11063 | // declarations semantically contained within an anonymous | ||||
11064 | // namespace internal linkage. | ||||
11065 | |||||
11066 | if (!PrevNS) { | ||||
11067 | UD = UsingDirectiveDecl::Create(Context, Parent, | ||||
11068 | /* 'using' */ LBrace, | ||||
11069 | /* 'namespace' */ SourceLocation(), | ||||
11070 | /* qualifier */ NestedNameSpecifierLoc(), | ||||
11071 | /* identifier */ SourceLocation(), | ||||
11072 | Namespc, | ||||
11073 | /* Ancestor */ Parent); | ||||
11074 | UD->setImplicit(); | ||||
11075 | Parent->addDecl(UD); | ||||
11076 | } | ||||
11077 | } | ||||
11078 | |||||
11079 | ActOnDocumentableDecl(Namespc); | ||||
11080 | |||||
11081 | // Although we could have an invalid decl (i.e. the namespace name is a | ||||
11082 | // redefinition), push it as current DeclContext and try to continue parsing. | ||||
11083 | // FIXME: We should be able to push Namespc here, so that the each DeclContext | ||||
11084 | // for the namespace has the declarations that showed up in that particular | ||||
11085 | // namespace definition. | ||||
11086 | PushDeclContext(NamespcScope, Namespc); | ||||
11087 | return Namespc; | ||||
11088 | } | ||||
11089 | |||||
11090 | /// getNamespaceDecl - Returns the namespace a decl represents. If the decl | ||||
11091 | /// is a namespace alias, returns the namespace it points to. | ||||
11092 | static inline NamespaceDecl *getNamespaceDecl(NamedDecl *D) { | ||||
11093 | if (NamespaceAliasDecl *AD = dyn_cast_or_null<NamespaceAliasDecl>(D)) | ||||
11094 | return AD->getNamespace(); | ||||
11095 | return dyn_cast_or_null<NamespaceDecl>(D); | ||||
11096 | } | ||||
11097 | |||||
11098 | /// ActOnFinishNamespaceDef - This callback is called after a namespace is | ||||
11099 | /// exited. Decl is the DeclTy returned by ActOnStartNamespaceDef. | ||||
11100 | void Sema::ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace) { | ||||
11101 | NamespaceDecl *Namespc = dyn_cast_or_null<NamespaceDecl>(Dcl); | ||||
11102 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11102, __extension__ __PRETTY_FUNCTION__)); | ||||
11103 | Namespc->setRBraceLoc(RBrace); | ||||
11104 | PopDeclContext(); | ||||
11105 | if (Namespc->hasAttr<VisibilityAttr>()) | ||||
11106 | PopPragmaVisibility(true, RBrace); | ||||
11107 | // If this namespace contains an export-declaration, export it now. | ||||
11108 | if (DeferredExportedNamespaces.erase(Namespc)) | ||||
11109 | Dcl->setModuleOwnershipKind(Decl::ModuleOwnershipKind::VisibleWhenImported); | ||||
11110 | } | ||||
11111 | |||||
11112 | CXXRecordDecl *Sema::getStdBadAlloc() const { | ||||
11113 | return cast_or_null<CXXRecordDecl>( | ||||
11114 | StdBadAlloc.get(Context.getExternalSource())); | ||||
11115 | } | ||||
11116 | |||||
11117 | EnumDecl *Sema::getStdAlignValT() const { | ||||
11118 | return cast_or_null<EnumDecl>(StdAlignValT.get(Context.getExternalSource())); | ||||
11119 | } | ||||
11120 | |||||
11121 | NamespaceDecl *Sema::getStdNamespace() const { | ||||
11122 | return cast_or_null<NamespaceDecl>( | ||||
11123 | StdNamespace.get(Context.getExternalSource())); | ||||
11124 | } | ||||
11125 | |||||
11126 | NamespaceDecl *Sema::lookupStdExperimentalNamespace() { | ||||
11127 | if (!StdExperimentalNamespaceCache) { | ||||
11128 | if (auto Std = getStdNamespace()) { | ||||
11129 | LookupResult Result(*this, &PP.getIdentifierTable().get("experimental"), | ||||
11130 | SourceLocation(), LookupNamespaceName); | ||||
11131 | if (!LookupQualifiedName(Result, Std) || | ||||
11132 | !(StdExperimentalNamespaceCache = | ||||
11133 | Result.getAsSingle<NamespaceDecl>())) | ||||
11134 | Result.suppressDiagnostics(); | ||||
11135 | } | ||||
11136 | } | ||||
11137 | return StdExperimentalNamespaceCache; | ||||
11138 | } | ||||
11139 | |||||
11140 | namespace { | ||||
11141 | |||||
11142 | enum UnsupportedSTLSelect { | ||||
11143 | USS_InvalidMember, | ||||
11144 | USS_MissingMember, | ||||
11145 | USS_NonTrivial, | ||||
11146 | USS_Other | ||||
11147 | }; | ||||
11148 | |||||
11149 | struct InvalidSTLDiagnoser { | ||||
11150 | Sema &S; | ||||
11151 | SourceLocation Loc; | ||||
11152 | QualType TyForDiags; | ||||
11153 | |||||
11154 | QualType operator()(UnsupportedSTLSelect Sel = USS_Other, StringRef Name = "", | ||||
11155 | const VarDecl *VD = nullptr) { | ||||
11156 | { | ||||
11157 | auto D = S.Diag(Loc, diag::err_std_compare_type_not_supported) | ||||
11158 | << TyForDiags << ((int)Sel); | ||||
11159 | if (Sel == USS_InvalidMember || Sel == USS_MissingMember) { | ||||
11160 | assert(!Name.empty())(static_cast <bool> (!Name.empty()) ? void (0) : __assert_fail ("!Name.empty()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11160, __extension__ __PRETTY_FUNCTION__)); | ||||
11161 | D << Name; | ||||
11162 | } | ||||
11163 | } | ||||
11164 | if (Sel == USS_InvalidMember) { | ||||
11165 | S.Diag(VD->getLocation(), diag::note_var_declared_here) | ||||
11166 | << VD << VD->getSourceRange(); | ||||
11167 | } | ||||
11168 | return QualType(); | ||||
11169 | } | ||||
11170 | }; | ||||
11171 | } // namespace | ||||
11172 | |||||
11173 | QualType Sema::CheckComparisonCategoryType(ComparisonCategoryType Kind, | ||||
11174 | SourceLocation Loc, | ||||
11175 | ComparisonCategoryUsage Usage) { | ||||
11176 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11177, __extension__ __PRETTY_FUNCTION__)) | ||||
11177 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11177, __extension__ __PRETTY_FUNCTION__)); | ||||
11178 | |||||
11179 | // Use an elaborated type for diagnostics which has a name containing the | ||||
11180 | // prepended 'std' namespace but not any inline namespace names. | ||||
11181 | auto TyForDiags = [&](ComparisonCategoryInfo *Info) { | ||||
11182 | auto *NNS = | ||||
11183 | NestedNameSpecifier::Create(Context, nullptr, getStdNamespace()); | ||||
11184 | return Context.getElaboratedType(ETK_None, NNS, Info->getType()); | ||||
11185 | }; | ||||
11186 | |||||
11187 | // Check if we've already successfully checked the comparison category type | ||||
11188 | // before. If so, skip checking it again. | ||||
11189 | ComparisonCategoryInfo *Info = Context.CompCategories.lookupInfo(Kind); | ||||
11190 | if (Info && FullyCheckedComparisonCategories[static_cast<unsigned>(Kind)]) { | ||||
11191 | // The only thing we need to check is that the type has a reachable | ||||
11192 | // definition in the current context. | ||||
11193 | if (RequireCompleteType(Loc, TyForDiags(Info), diag::err_incomplete_type)) | ||||
11194 | return QualType(); | ||||
11195 | |||||
11196 | return Info->getType(); | ||||
11197 | } | ||||
11198 | |||||
11199 | // If lookup failed | ||||
11200 | if (!Info) { | ||||
11201 | std::string NameForDiags = "std::"; | ||||
11202 | NameForDiags += ComparisonCategories::getCategoryString(Kind); | ||||
11203 | Diag(Loc, diag::err_implied_comparison_category_type_not_found) | ||||
11204 | << NameForDiags << (int)Usage; | ||||
11205 | return QualType(); | ||||
11206 | } | ||||
11207 | |||||
11208 | assert(Info->Kind == Kind)(static_cast <bool> (Info->Kind == Kind) ? void (0) : __assert_fail ("Info->Kind == Kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11208, __extension__ __PRETTY_FUNCTION__)); | ||||
11209 | assert(Info->Record)(static_cast <bool> (Info->Record) ? void (0) : __assert_fail ("Info->Record", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11209, __extension__ __PRETTY_FUNCTION__)); | ||||
11210 | |||||
11211 | // Update the Record decl in case we encountered a forward declaration on our | ||||
11212 | // first pass. FIXME: This is a bit of a hack. | ||||
11213 | if (Info->Record->hasDefinition()) | ||||
11214 | Info->Record = Info->Record->getDefinition(); | ||||
11215 | |||||
11216 | if (RequireCompleteType(Loc, TyForDiags(Info), diag::err_incomplete_type)) | ||||
11217 | return QualType(); | ||||
11218 | |||||
11219 | InvalidSTLDiagnoser UnsupportedSTLError{*this, Loc, TyForDiags(Info)}; | ||||
11220 | |||||
11221 | if (!Info->Record->isTriviallyCopyable()) | ||||
11222 | return UnsupportedSTLError(USS_NonTrivial); | ||||
11223 | |||||
11224 | for (const CXXBaseSpecifier &BaseSpec : Info->Record->bases()) { | ||||
11225 | CXXRecordDecl *Base = BaseSpec.getType()->getAsCXXRecordDecl(); | ||||
11226 | // Tolerate empty base classes. | ||||
11227 | if (Base->isEmpty()) | ||||
11228 | continue; | ||||
11229 | // Reject STL implementations which have at least one non-empty base. | ||||
11230 | return UnsupportedSTLError(); | ||||
11231 | } | ||||
11232 | |||||
11233 | // Check that the STL has implemented the types using a single integer field. | ||||
11234 | // This expectation allows better codegen for builtin operators. We require: | ||||
11235 | // (1) The class has exactly one field. | ||||
11236 | // (2) The field is an integral or enumeration type. | ||||
11237 | auto FIt = Info->Record->field_begin(), FEnd = Info->Record->field_end(); | ||||
11238 | if (std::distance(FIt, FEnd) != 1 || | ||||
11239 | !FIt->getType()->isIntegralOrEnumerationType()) { | ||||
11240 | return UnsupportedSTLError(); | ||||
11241 | } | ||||
11242 | |||||
11243 | // Build each of the require values and store them in Info. | ||||
11244 | for (ComparisonCategoryResult CCR : | ||||
11245 | ComparisonCategories::getPossibleResultsForType(Kind)) { | ||||
11246 | StringRef MemName = ComparisonCategories::getResultString(CCR); | ||||
11247 | ComparisonCategoryInfo::ValueInfo *ValInfo = Info->lookupValueInfo(CCR); | ||||
11248 | |||||
11249 | if (!ValInfo) | ||||
11250 | return UnsupportedSTLError(USS_MissingMember, MemName); | ||||
11251 | |||||
11252 | VarDecl *VD = ValInfo->VD; | ||||
11253 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11253, __extension__ __PRETTY_FUNCTION__)); | ||||
11254 | |||||
11255 | // Attempt to diagnose reasons why the STL definition of this type | ||||
11256 | // might be foobar, including it failing to be a constant expression. | ||||
11257 | // TODO Handle more ways the lookup or result can be invalid. | ||||
11258 | if (!VD->isStaticDataMember() || | ||||
11259 | !VD->isUsableInConstantExpressions(Context)) | ||||
11260 | return UnsupportedSTLError(USS_InvalidMember, MemName, VD); | ||||
11261 | |||||
11262 | // Attempt to evaluate the var decl as a constant expression and extract | ||||
11263 | // the value of its first field as a ICE. If this fails, the STL | ||||
11264 | // implementation is not supported. | ||||
11265 | if (!ValInfo->hasValidIntValue()) | ||||
11266 | return UnsupportedSTLError(); | ||||
11267 | |||||
11268 | MarkVariableReferenced(Loc, VD); | ||||
11269 | } | ||||
11270 | |||||
11271 | // We've successfully built the required types and expressions. Update | ||||
11272 | // the cache and return the newly cached value. | ||||
11273 | FullyCheckedComparisonCategories[static_cast<unsigned>(Kind)] = true; | ||||
11274 | return Info->getType(); | ||||
11275 | } | ||||
11276 | |||||
11277 | /// Retrieve the special "std" namespace, which may require us to | ||||
11278 | /// implicitly define the namespace. | ||||
11279 | NamespaceDecl *Sema::getOrCreateStdNamespace() { | ||||
11280 | if (!StdNamespace) { | ||||
11281 | // The "std" namespace has not yet been defined, so build one implicitly. | ||||
11282 | StdNamespace = NamespaceDecl::Create(Context, | ||||
11283 | Context.getTranslationUnitDecl(), | ||||
11284 | /*Inline=*/false, | ||||
11285 | SourceLocation(), SourceLocation(), | ||||
11286 | &PP.getIdentifierTable().get("std"), | ||||
11287 | /*PrevDecl=*/nullptr); | ||||
11288 | getStdNamespace()->setImplicit(true); | ||||
11289 | } | ||||
11290 | |||||
11291 | return getStdNamespace(); | ||||
11292 | } | ||||
11293 | |||||
11294 | bool Sema::isStdInitializerList(QualType Ty, QualType *Element) { | ||||
11295 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11296, __extension__ __PRETTY_FUNCTION__)) | ||||
11296 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11296, __extension__ __PRETTY_FUNCTION__)); | ||||
11297 | |||||
11298 | // We're looking for implicit instantiations of | ||||
11299 | // template <typename E> class std::initializer_list. | ||||
11300 | |||||
11301 | if (!StdNamespace) // If we haven't seen namespace std yet, this can't be it. | ||||
11302 | return false; | ||||
11303 | |||||
11304 | ClassTemplateDecl *Template = nullptr; | ||||
11305 | const TemplateArgument *Arguments = nullptr; | ||||
11306 | |||||
11307 | if (const RecordType *RT = Ty->getAs<RecordType>()) { | ||||
11308 | |||||
11309 | ClassTemplateSpecializationDecl *Specialization = | ||||
11310 | dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl()); | ||||
11311 | if (!Specialization) | ||||
11312 | return false; | ||||
11313 | |||||
11314 | Template = Specialization->getSpecializedTemplate(); | ||||
11315 | Arguments = Specialization->getTemplateArgs().data(); | ||||
11316 | } else if (const TemplateSpecializationType *TST = | ||||
11317 | Ty->getAs<TemplateSpecializationType>()) { | ||||
11318 | Template = dyn_cast_or_null<ClassTemplateDecl>( | ||||
11319 | TST->getTemplateName().getAsTemplateDecl()); | ||||
11320 | Arguments = TST->getArgs(); | ||||
11321 | } | ||||
11322 | if (!Template) | ||||
11323 | return false; | ||||
11324 | |||||
11325 | if (!StdInitializerList) { | ||||
11326 | // Haven't recognized std::initializer_list yet, maybe this is it. | ||||
11327 | CXXRecordDecl *TemplateClass = Template->getTemplatedDecl(); | ||||
11328 | if (TemplateClass->getIdentifier() != | ||||
11329 | &PP.getIdentifierTable().get("initializer_list") || | ||||
11330 | !getStdNamespace()->InEnclosingNamespaceSetOf( | ||||
11331 | TemplateClass->getDeclContext())) | ||||
11332 | return false; | ||||
11333 | // This is a template called std::initializer_list, but is it the right | ||||
11334 | // template? | ||||
11335 | TemplateParameterList *Params = Template->getTemplateParameters(); | ||||
11336 | if (Params->getMinRequiredArguments() != 1) | ||||
11337 | return false; | ||||
11338 | if (!isa<TemplateTypeParmDecl>(Params->getParam(0))) | ||||
11339 | return false; | ||||
11340 | |||||
11341 | // It's the right template. | ||||
11342 | StdInitializerList = Template; | ||||
11343 | } | ||||
11344 | |||||
11345 | if (Template->getCanonicalDecl() != StdInitializerList->getCanonicalDecl()) | ||||
11346 | return false; | ||||
11347 | |||||
11348 | // This is an instance of std::initializer_list. Find the argument type. | ||||
11349 | if (Element) | ||||
11350 | *Element = Arguments[0].getAsType(); | ||||
11351 | return true; | ||||
11352 | } | ||||
11353 | |||||
11354 | static ClassTemplateDecl *LookupStdInitializerList(Sema &S, SourceLocation Loc){ | ||||
11355 | NamespaceDecl *Std = S.getStdNamespace(); | ||||
11356 | if (!Std) { | ||||
11357 | S.Diag(Loc, diag::err_implied_std_initializer_list_not_found); | ||||
11358 | return nullptr; | ||||
11359 | } | ||||
11360 | |||||
11361 | LookupResult Result(S, &S.PP.getIdentifierTable().get("initializer_list"), | ||||
11362 | Loc, Sema::LookupOrdinaryName); | ||||
11363 | if (!S.LookupQualifiedName(Result, Std)) { | ||||
11364 | S.Diag(Loc, diag::err_implied_std_initializer_list_not_found); | ||||
11365 | return nullptr; | ||||
11366 | } | ||||
11367 | ClassTemplateDecl *Template = Result.getAsSingle<ClassTemplateDecl>(); | ||||
11368 | if (!Template) { | ||||
11369 | Result.suppressDiagnostics(); | ||||
11370 | // We found something weird. Complain about the first thing we found. | ||||
11371 | NamedDecl *Found = *Result.begin(); | ||||
11372 | S.Diag(Found->getLocation(), diag::err_malformed_std_initializer_list); | ||||
11373 | return nullptr; | ||||
11374 | } | ||||
11375 | |||||
11376 | // We found some template called std::initializer_list. Now verify that it's | ||||
11377 | // correct. | ||||
11378 | TemplateParameterList *Params = Template->getTemplateParameters(); | ||||
11379 | if (Params->getMinRequiredArguments() != 1 || | ||||
11380 | !isa<TemplateTypeParmDecl>(Params->getParam(0))) { | ||||
11381 | S.Diag(Template->getLocation(), diag::err_malformed_std_initializer_list); | ||||
11382 | return nullptr; | ||||
11383 | } | ||||
11384 | |||||
11385 | return Template; | ||||
11386 | } | ||||
11387 | |||||
11388 | QualType Sema::BuildStdInitializerList(QualType Element, SourceLocation Loc) { | ||||
11389 | if (!StdInitializerList) { | ||||
11390 | StdInitializerList = LookupStdInitializerList(*this, Loc); | ||||
11391 | if (!StdInitializerList) | ||||
11392 | return QualType(); | ||||
11393 | } | ||||
11394 | |||||
11395 | TemplateArgumentListInfo Args(Loc, Loc); | ||||
11396 | Args.addArgument(TemplateArgumentLoc(TemplateArgument(Element), | ||||
11397 | Context.getTrivialTypeSourceInfo(Element, | ||||
11398 | Loc))); | ||||
11399 | return Context.getCanonicalType( | ||||
11400 | CheckTemplateIdType(TemplateName(StdInitializerList), Loc, Args)); | ||||
11401 | } | ||||
11402 | |||||
11403 | bool Sema::isInitListConstructor(const FunctionDecl *Ctor) { | ||||
11404 | // C++ [dcl.init.list]p2: | ||||
11405 | // A constructor is an initializer-list constructor if its first parameter | ||||
11406 | // is of type std::initializer_list<E> or reference to possibly cv-qualified | ||||
11407 | // std::initializer_list<E> for some type E, and either there are no other | ||||
11408 | // parameters or else all other parameters have default arguments. | ||||
11409 | if (!Ctor->hasOneParamOrDefaultArgs()) | ||||
11410 | return false; | ||||
11411 | |||||
11412 | QualType ArgType = Ctor->getParamDecl(0)->getType(); | ||||
11413 | if (const ReferenceType *RT = ArgType->getAs<ReferenceType>()) | ||||
11414 | ArgType = RT->getPointeeType().getUnqualifiedType(); | ||||
11415 | |||||
11416 | return isStdInitializerList(ArgType, nullptr); | ||||
11417 | } | ||||
11418 | |||||
11419 | /// Determine whether a using statement is in a context where it will be | ||||
11420 | /// apply in all contexts. | ||||
11421 | static bool IsUsingDirectiveInToplevelContext(DeclContext *CurContext) { | ||||
11422 | switch (CurContext->getDeclKind()) { | ||||
11423 | case Decl::TranslationUnit: | ||||
11424 | return true; | ||||
11425 | case Decl::LinkageSpec: | ||||
11426 | return IsUsingDirectiveInToplevelContext(CurContext->getParent()); | ||||
11427 | default: | ||||
11428 | return false; | ||||
11429 | } | ||||
11430 | } | ||||
11431 | |||||
11432 | namespace { | ||||
11433 | |||||
11434 | // Callback to only accept typo corrections that are namespaces. | ||||
11435 | class NamespaceValidatorCCC final : public CorrectionCandidateCallback { | ||||
11436 | public: | ||||
11437 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||
11438 | if (NamedDecl *ND = candidate.getCorrectionDecl()) | ||||
11439 | return isa<NamespaceDecl>(ND) || isa<NamespaceAliasDecl>(ND); | ||||
11440 | return false; | ||||
11441 | } | ||||
11442 | |||||
11443 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||
11444 | return std::make_unique<NamespaceValidatorCCC>(*this); | ||||
11445 | } | ||||
11446 | }; | ||||
11447 | |||||
11448 | } | ||||
11449 | |||||
11450 | static bool TryNamespaceTypoCorrection(Sema &S, LookupResult &R, Scope *Sc, | ||||
11451 | CXXScopeSpec &SS, | ||||
11452 | SourceLocation IdentLoc, | ||||
11453 | IdentifierInfo *Ident) { | ||||
11454 | R.clear(); | ||||
11455 | NamespaceValidatorCCC CCC{}; | ||||
11456 | if (TypoCorrection Corrected = | ||||
11457 | S.CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), Sc, &SS, CCC, | ||||
11458 | Sema::CTK_ErrorRecovery)) { | ||||
11459 | if (DeclContext *DC = S.computeDeclContext(SS, false)) { | ||||
11460 | std::string CorrectedStr(Corrected.getAsString(S.getLangOpts())); | ||||
11461 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||
11462 | Ident->getName().equals(CorrectedStr); | ||||
11463 | S.diagnoseTypo(Corrected, | ||||
11464 | S.PDiag(diag::err_using_directive_member_suggest) | ||||
11465 | << Ident << DC << DroppedSpecifier << SS.getRange(), | ||||
11466 | S.PDiag(diag::note_namespace_defined_here)); | ||||
11467 | } else { | ||||
11468 | S.diagnoseTypo(Corrected, | ||||
11469 | S.PDiag(diag::err_using_directive_suggest) << Ident, | ||||
11470 | S.PDiag(diag::note_namespace_defined_here)); | ||||
11471 | } | ||||
11472 | R.addDecl(Corrected.getFoundDecl()); | ||||
11473 | return true; | ||||
11474 | } | ||||
11475 | return false; | ||||
11476 | } | ||||
11477 | |||||
11478 | Decl *Sema::ActOnUsingDirective(Scope *S, SourceLocation UsingLoc, | ||||
11479 | SourceLocation NamespcLoc, CXXScopeSpec &SS, | ||||
11480 | SourceLocation IdentLoc, | ||||
11481 | IdentifierInfo *NamespcName, | ||||
11482 | const ParsedAttributesView &AttrList) { | ||||
11483 | assert(!SS.isInvalid() && "Invalid CXXScopeSpec.")(static_cast <bool> (!SS.isInvalid() && "Invalid CXXScopeSpec." ) ? void (0) : __assert_fail ("!SS.isInvalid() && \"Invalid CXXScopeSpec.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11483, __extension__ __PRETTY_FUNCTION__)); | ||||
11484 | assert(NamespcName && "Invalid NamespcName.")(static_cast <bool> (NamespcName && "Invalid NamespcName." ) ? void (0) : __assert_fail ("NamespcName && \"Invalid NamespcName.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11484, __extension__ __PRETTY_FUNCTION__)); | ||||
11485 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11485, __extension__ __PRETTY_FUNCTION__)); | ||||
11486 | |||||
11487 | // This can only happen along a recovery path. | ||||
11488 | while (S->isTemplateParamScope()) | ||||
11489 | S = S->getParent(); | ||||
11490 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11490, __extension__ __PRETTY_FUNCTION__)); | ||||
11491 | |||||
11492 | UsingDirectiveDecl *UDir = nullptr; | ||||
11493 | NestedNameSpecifier *Qualifier = nullptr; | ||||
11494 | if (SS.isSet()) | ||||
11495 | Qualifier = SS.getScopeRep(); | ||||
11496 | |||||
11497 | // Lookup namespace name. | ||||
11498 | LookupResult R(*this, NamespcName, IdentLoc, LookupNamespaceName); | ||||
11499 | LookupParsedName(R, S, &SS); | ||||
11500 | if (R.isAmbiguous()) | ||||
11501 | return nullptr; | ||||
11502 | |||||
11503 | if (R.empty()) { | ||||
11504 | R.clear(); | ||||
11505 | // Allow "using namespace std;" or "using namespace ::std;" even if | ||||
11506 | // "std" hasn't been defined yet, for GCC compatibility. | ||||
11507 | if ((!Qualifier || Qualifier->getKind() == NestedNameSpecifier::Global) && | ||||
11508 | NamespcName->isStr("std")) { | ||||
11509 | Diag(IdentLoc, diag::ext_using_undefined_std); | ||||
11510 | R.addDecl(getOrCreateStdNamespace()); | ||||
11511 | R.resolveKind(); | ||||
11512 | } | ||||
11513 | // Otherwise, attempt typo correction. | ||||
11514 | else TryNamespaceTypoCorrection(*this, R, S, SS, IdentLoc, NamespcName); | ||||
11515 | } | ||||
11516 | |||||
11517 | if (!R.empty()) { | ||||
11518 | NamedDecl *Named = R.getRepresentativeDecl(); | ||||
11519 | NamespaceDecl *NS = R.getAsSingle<NamespaceDecl>(); | ||||
11520 | assert(NS && "expected namespace decl")(static_cast <bool> (NS && "expected namespace decl" ) ? void (0) : __assert_fail ("NS && \"expected namespace decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11520, __extension__ __PRETTY_FUNCTION__)); | ||||
11521 | |||||
11522 | // The use of a nested name specifier may trigger deprecation warnings. | ||||
11523 | DiagnoseUseOfDecl(Named, IdentLoc); | ||||
11524 | |||||
11525 | // C++ [namespace.udir]p1: | ||||
11526 | // A using-directive specifies that the names in the nominated | ||||
11527 | // namespace can be used in the scope in which the | ||||
11528 | // using-directive appears after the using-directive. During | ||||
11529 | // unqualified name lookup (3.4.1), the names appear as if they | ||||
11530 | // were declared in the nearest enclosing namespace which | ||||
11531 | // contains both the using-directive and the nominated | ||||
11532 | // namespace. [Note: in this context, "contains" means "contains | ||||
11533 | // directly or indirectly". ] | ||||
11534 | |||||
11535 | // Find enclosing context containing both using-directive and | ||||
11536 | // nominated namespace. | ||||
11537 | DeclContext *CommonAncestor = NS; | ||||
11538 | while (CommonAncestor && !CommonAncestor->Encloses(CurContext)) | ||||
11539 | CommonAncestor = CommonAncestor->getParent(); | ||||
11540 | |||||
11541 | UDir = UsingDirectiveDecl::Create(Context, CurContext, UsingLoc, NamespcLoc, | ||||
11542 | SS.getWithLocInContext(Context), | ||||
11543 | IdentLoc, Named, CommonAncestor); | ||||
11544 | |||||
11545 | if (IsUsingDirectiveInToplevelContext(CurContext) && | ||||
11546 | !SourceMgr.isInMainFile(SourceMgr.getExpansionLoc(IdentLoc))) { | ||||
11547 | Diag(IdentLoc, diag::warn_using_directive_in_header); | ||||
11548 | } | ||||
11549 | |||||
11550 | PushUsingDirective(S, UDir); | ||||
11551 | } else { | ||||
11552 | Diag(IdentLoc, diag::err_expected_namespace_name) << SS.getRange(); | ||||
11553 | } | ||||
11554 | |||||
11555 | if (UDir) | ||||
11556 | ProcessDeclAttributeList(S, UDir, AttrList); | ||||
11557 | |||||
11558 | return UDir; | ||||
11559 | } | ||||
11560 | |||||
11561 | void Sema::PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir) { | ||||
11562 | // If the scope has an associated entity and the using directive is at | ||||
11563 | // namespace or translation unit scope, add the UsingDirectiveDecl into | ||||
11564 | // its lookup structure so qualified name lookup can find it. | ||||
11565 | DeclContext *Ctx = S->getEntity(); | ||||
11566 | if (Ctx && !Ctx->isFunctionOrMethod()) | ||||
11567 | Ctx->addDecl(UDir); | ||||
11568 | else | ||||
11569 | // Otherwise, it is at block scope. The using-directives will affect lookup | ||||
11570 | // only to the end of the scope. | ||||
11571 | S->PushUsingDirective(UDir); | ||||
11572 | } | ||||
11573 | |||||
11574 | Decl *Sema::ActOnUsingDeclaration(Scope *S, AccessSpecifier AS, | ||||
11575 | SourceLocation UsingLoc, | ||||
11576 | SourceLocation TypenameLoc, CXXScopeSpec &SS, | ||||
11577 | UnqualifiedId &Name, | ||||
11578 | SourceLocation EllipsisLoc, | ||||
11579 | const ParsedAttributesView &AttrList) { | ||||
11580 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11580, __extension__ __PRETTY_FUNCTION__)); | ||||
11581 | |||||
11582 | if (SS.isEmpty()) { | ||||
11583 | Diag(Name.getBeginLoc(), diag::err_using_requires_qualname); | ||||
11584 | return nullptr; | ||||
11585 | } | ||||
11586 | |||||
11587 | switch (Name.getKind()) { | ||||
11588 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||
11589 | case UnqualifiedIdKind::IK_Identifier: | ||||
11590 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||
11591 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||
11592 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||
11593 | break; | ||||
11594 | |||||
11595 | case UnqualifiedIdKind::IK_ConstructorName: | ||||
11596 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||
11597 | // C++11 inheriting constructors. | ||||
11598 | Diag(Name.getBeginLoc(), | ||||
11599 | getLangOpts().CPlusPlus11 | ||||
11600 | ? diag::warn_cxx98_compat_using_decl_constructor | ||||
11601 | : diag::err_using_decl_constructor) | ||||
11602 | << SS.getRange(); | ||||
11603 | |||||
11604 | if (getLangOpts().CPlusPlus11) break; | ||||
11605 | |||||
11606 | return nullptr; | ||||
11607 | |||||
11608 | case UnqualifiedIdKind::IK_DestructorName: | ||||
11609 | Diag(Name.getBeginLoc(), diag::err_using_decl_destructor) << SS.getRange(); | ||||
11610 | return nullptr; | ||||
11611 | |||||
11612 | case UnqualifiedIdKind::IK_TemplateId: | ||||
11613 | Diag(Name.getBeginLoc(), diag::err_using_decl_template_id) | ||||
11614 | << SourceRange(Name.TemplateId->LAngleLoc, Name.TemplateId->RAngleLoc); | ||||
11615 | return nullptr; | ||||
11616 | |||||
11617 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||
11618 | llvm_unreachable("cannot parse qualified deduction guide name")::llvm::llvm_unreachable_internal("cannot parse qualified deduction guide name" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11618); | ||||
11619 | } | ||||
11620 | |||||
11621 | DeclarationNameInfo TargetNameInfo = GetNameFromUnqualifiedId(Name); | ||||
11622 | DeclarationName TargetName = TargetNameInfo.getName(); | ||||
11623 | if (!TargetName) | ||||
11624 | return nullptr; | ||||
11625 | |||||
11626 | // Warn about access declarations. | ||||
11627 | if (UsingLoc.isInvalid()) { | ||||
11628 | Diag(Name.getBeginLoc(), getLangOpts().CPlusPlus11 | ||||
11629 | ? diag::err_access_decl | ||||
11630 | : diag::warn_access_decl_deprecated) | ||||
11631 | << FixItHint::CreateInsertion(SS.getRange().getBegin(), "using "); | ||||
11632 | } | ||||
11633 | |||||
11634 | if (EllipsisLoc.isInvalid()) { | ||||
11635 | if (DiagnoseUnexpandedParameterPack(SS, UPPC_UsingDeclaration) || | ||||
11636 | DiagnoseUnexpandedParameterPack(TargetNameInfo, UPPC_UsingDeclaration)) | ||||
11637 | return nullptr; | ||||
11638 | } else { | ||||
11639 | if (!SS.getScopeRep()->containsUnexpandedParameterPack() && | ||||
11640 | !TargetNameInfo.containsUnexpandedParameterPack()) { | ||||
11641 | Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | ||||
11642 | << SourceRange(SS.getBeginLoc(), TargetNameInfo.getEndLoc()); | ||||
11643 | EllipsisLoc = SourceLocation(); | ||||
11644 | } | ||||
11645 | } | ||||
11646 | |||||
11647 | NamedDecl *UD = | ||||
11648 | BuildUsingDeclaration(S, AS, UsingLoc, TypenameLoc.isValid(), TypenameLoc, | ||||
11649 | SS, TargetNameInfo, EllipsisLoc, AttrList, | ||||
11650 | /*IsInstantiation*/ false, | ||||
11651 | AttrList.hasAttribute(ParsedAttr::AT_UsingIfExists)); | ||||
11652 | if (UD) | ||||
11653 | PushOnScopeChains(UD, S, /*AddToContext*/ false); | ||||
11654 | |||||
11655 | return UD; | ||||
11656 | } | ||||
11657 | |||||
11658 | Decl *Sema::ActOnUsingEnumDeclaration(Scope *S, AccessSpecifier AS, | ||||
11659 | SourceLocation UsingLoc, | ||||
11660 | SourceLocation EnumLoc, | ||||
11661 | const DeclSpec &DS) { | ||||
11662 | switch (DS.getTypeSpecType()) { | ||||
11663 | case DeclSpec::TST_error: | ||||
11664 | // This will already have been diagnosed | ||||
11665 | return nullptr; | ||||
11666 | |||||
11667 | case DeclSpec::TST_enum: | ||||
11668 | break; | ||||
11669 | |||||
11670 | case DeclSpec::TST_typename: | ||||
11671 | Diag(DS.getTypeSpecTypeLoc(), diag::err_using_enum_is_dependent); | ||||
11672 | return nullptr; | ||||
11673 | |||||
11674 | default: | ||||
11675 | llvm_unreachable("unexpected DeclSpec type")::llvm::llvm_unreachable_internal("unexpected DeclSpec type", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11675); | ||||
11676 | } | ||||
11677 | |||||
11678 | // As with enum-decls, we ignore attributes for now. | ||||
11679 | auto *Enum = cast<EnumDecl>(DS.getRepAsDecl()); | ||||
11680 | if (auto *Def = Enum->getDefinition()) | ||||
11681 | Enum = Def; | ||||
11682 | |||||
11683 | auto *UD = BuildUsingEnumDeclaration(S, AS, UsingLoc, EnumLoc, | ||||
11684 | DS.getTypeSpecTypeNameLoc(), Enum); | ||||
11685 | if (UD) | ||||
11686 | PushOnScopeChains(UD, S, /*AddToContext*/ false); | ||||
11687 | |||||
11688 | return UD; | ||||
11689 | } | ||||
11690 | |||||
11691 | /// Determine whether a using declaration considers the given | ||||
11692 | /// declarations as "equivalent", e.g., if they are redeclarations of | ||||
11693 | /// the same entity or are both typedefs of the same type. | ||||
11694 | static bool | ||||
11695 | IsEquivalentForUsingDecl(ASTContext &Context, NamedDecl *D1, NamedDecl *D2) { | ||||
11696 | if (D1->getCanonicalDecl() == D2->getCanonicalDecl()) | ||||
11697 | return true; | ||||
11698 | |||||
11699 | if (TypedefNameDecl *TD1 = dyn_cast<TypedefNameDecl>(D1)) | ||||
11700 | if (TypedefNameDecl *TD2 = dyn_cast<TypedefNameDecl>(D2)) | ||||
11701 | return Context.hasSameType(TD1->getUnderlyingType(), | ||||
11702 | TD2->getUnderlyingType()); | ||||
11703 | |||||
11704 | // Two using_if_exists using-declarations are equivalent if both are | ||||
11705 | // unresolved. | ||||
11706 | if (isa<UnresolvedUsingIfExistsDecl>(D1) && | ||||
11707 | isa<UnresolvedUsingIfExistsDecl>(D2)) | ||||
11708 | return true; | ||||
11709 | |||||
11710 | return false; | ||||
11711 | } | ||||
11712 | |||||
11713 | |||||
11714 | /// Determines whether to create a using shadow decl for a particular | ||||
11715 | /// decl, given the set of decls existing prior to this using lookup. | ||||
11716 | bool Sema::CheckUsingShadowDecl(BaseUsingDecl *BUD, NamedDecl *Orig, | ||||
11717 | const LookupResult &Previous, | ||||
11718 | UsingShadowDecl *&PrevShadow) { | ||||
11719 | // Diagnose finding a decl which is not from a base class of the | ||||
11720 | // current class. We do this now because there are cases where this | ||||
11721 | // function will silently decide not to build a shadow decl, which | ||||
11722 | // will pre-empt further diagnostics. | ||||
11723 | // | ||||
11724 | // We don't need to do this in C++11 because we do the check once on | ||||
11725 | // the qualifier. | ||||
11726 | // | ||||
11727 | // FIXME: diagnose the following if we care enough: | ||||
11728 | // struct A { int foo; }; | ||||
11729 | // struct B : A { using A::foo; }; | ||||
11730 | // template <class T> struct C : A {}; | ||||
11731 | // template <class T> struct D : C<T> { using B::foo; } // <--- | ||||
11732 | // This is invalid (during instantiation) in C++03 because B::foo | ||||
11733 | // resolves to the using decl in B, which is not a base class of D<T>. | ||||
11734 | // We can't diagnose it immediately because C<T> is an unknown | ||||
11735 | // specialization. The UsingShadowDecl in D<T> then points directly | ||||
11736 | // to A::foo, which will look well-formed when we instantiate. | ||||
11737 | // The right solution is to not collapse the shadow-decl chain. | ||||
11738 | if (!getLangOpts().CPlusPlus11 && CurContext->isRecord()) | ||||
11739 | if (auto *Using = dyn_cast<UsingDecl>(BUD)) { | ||||
11740 | DeclContext *OrigDC = Orig->getDeclContext(); | ||||
11741 | |||||
11742 | // Handle enums and anonymous structs. | ||||
11743 | if (isa<EnumDecl>(OrigDC)) | ||||
11744 | OrigDC = OrigDC->getParent(); | ||||
11745 | CXXRecordDecl *OrigRec = cast<CXXRecordDecl>(OrigDC); | ||||
11746 | while (OrigRec->isAnonymousStructOrUnion()) | ||||
11747 | OrigRec = cast<CXXRecordDecl>(OrigRec->getDeclContext()); | ||||
11748 | |||||
11749 | if (cast<CXXRecordDecl>(CurContext)->isProvablyNotDerivedFrom(OrigRec)) { | ||||
11750 | if (OrigDC == CurContext) { | ||||
11751 | Diag(Using->getLocation(), | ||||
11752 | diag::err_using_decl_nested_name_specifier_is_current_class) | ||||
11753 | << Using->getQualifierLoc().getSourceRange(); | ||||
11754 | Diag(Orig->getLocation(), diag::note_using_decl_target); | ||||
11755 | Using->setInvalidDecl(); | ||||
11756 | return true; | ||||
11757 | } | ||||
11758 | |||||
11759 | Diag(Using->getQualifierLoc().getBeginLoc(), | ||||
11760 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||
11761 | << Using->getQualifier() << cast<CXXRecordDecl>(CurContext) | ||||
11762 | << Using->getQualifierLoc().getSourceRange(); | ||||
11763 | Diag(Orig->getLocation(), diag::note_using_decl_target); | ||||
11764 | Using->setInvalidDecl(); | ||||
11765 | return true; | ||||
11766 | } | ||||
11767 | } | ||||
11768 | |||||
11769 | if (Previous.empty()) return false; | ||||
11770 | |||||
11771 | NamedDecl *Target = Orig; | ||||
11772 | if (isa<UsingShadowDecl>(Target)) | ||||
11773 | Target = cast<UsingShadowDecl>(Target)->getTargetDecl(); | ||||
11774 | |||||
11775 | // If the target happens to be one of the previous declarations, we | ||||
11776 | // don't have a conflict. | ||||
11777 | // | ||||
11778 | // FIXME: but we might be increasing its access, in which case we | ||||
11779 | // should redeclare it. | ||||
11780 | NamedDecl *NonTag = nullptr, *Tag = nullptr; | ||||
11781 | bool FoundEquivalentDecl = false; | ||||
11782 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||
11783 | I != E; ++I) { | ||||
11784 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||
11785 | // We can have UsingDecls in our Previous results because we use the same | ||||
11786 | // LookupResult for checking whether the UsingDecl itself is a valid | ||||
11787 | // redeclaration. | ||||
11788 | if (isa<UsingDecl>(D) || isa<UsingPackDecl>(D) || isa<UsingEnumDecl>(D)) | ||||
11789 | continue; | ||||
11790 | |||||
11791 | if (auto *RD = dyn_cast<CXXRecordDecl>(D)) { | ||||
11792 | // C++ [class.mem]p19: | ||||
11793 | // If T is the name of a class, then [every named member other than | ||||
11794 | // a non-static data member] shall have a name different from T | ||||
11795 | if (RD->isInjectedClassName() && !isa<FieldDecl>(Target) && | ||||
11796 | !isa<IndirectFieldDecl>(Target) && | ||||
11797 | !isa<UnresolvedUsingValueDecl>(Target) && | ||||
11798 | DiagnoseClassNameShadow( | ||||
11799 | CurContext, | ||||
11800 | DeclarationNameInfo(BUD->getDeclName(), BUD->getLocation()))) | ||||
11801 | return true; | ||||
11802 | } | ||||
11803 | |||||
11804 | if (IsEquivalentForUsingDecl(Context, D, Target)) { | ||||
11805 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(*I)) | ||||
11806 | PrevShadow = Shadow; | ||||
11807 | FoundEquivalentDecl = true; | ||||
11808 | } else if (isEquivalentInternalLinkageDeclaration(D, Target)) { | ||||
11809 | // We don't conflict with an existing using shadow decl of an equivalent | ||||
11810 | // declaration, but we're not a redeclaration of it. | ||||
11811 | FoundEquivalentDecl = true; | ||||
11812 | } | ||||
11813 | |||||
11814 | if (isVisible(D)) | ||||
11815 | (isa<TagDecl>(D) ? Tag : NonTag) = D; | ||||
11816 | } | ||||
11817 | |||||
11818 | if (FoundEquivalentDecl) | ||||
11819 | return false; | ||||
11820 | |||||
11821 | // Always emit a diagnostic for a mismatch between an unresolved | ||||
11822 | // using_if_exists and a resolved using declaration in either direction. | ||||
11823 | if (isa<UnresolvedUsingIfExistsDecl>(Target) != | ||||
11824 | (isa_and_nonnull<UnresolvedUsingIfExistsDecl>(NonTag))) { | ||||
11825 | if (!NonTag && !Tag) | ||||
11826 | return false; | ||||
11827 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||
11828 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||
11829 | Diag((NonTag ? NonTag : Tag)->getLocation(), | ||||
11830 | diag::note_using_decl_conflict); | ||||
11831 | BUD->setInvalidDecl(); | ||||
11832 | return true; | ||||
11833 | } | ||||
11834 | |||||
11835 | if (FunctionDecl *FD = Target->getAsFunction()) { | ||||
11836 | NamedDecl *OldDecl = nullptr; | ||||
11837 | switch (CheckOverload(nullptr, FD, Previous, OldDecl, | ||||
11838 | /*IsForUsingDecl*/ true)) { | ||||
11839 | case Ovl_Overload: | ||||
11840 | return false; | ||||
11841 | |||||
11842 | case Ovl_NonFunction: | ||||
11843 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||
11844 | break; | ||||
11845 | |||||
11846 | // We found a decl with the exact signature. | ||||
11847 | case Ovl_Match: | ||||
11848 | // If we're in a record, we want to hide the target, so we | ||||
11849 | // return true (without a diagnostic) to tell the caller not to | ||||
11850 | // build a shadow decl. | ||||
11851 | if (CurContext->isRecord()) | ||||
11852 | return true; | ||||
11853 | |||||
11854 | // If we're not in a record, this is an error. | ||||
11855 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||
11856 | break; | ||||
11857 | } | ||||
11858 | |||||
11859 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||
11860 | Diag(OldDecl->getLocation(), diag::note_using_decl_conflict); | ||||
11861 | BUD->setInvalidDecl(); | ||||
11862 | return true; | ||||
11863 | } | ||||
11864 | |||||
11865 | // Target is not a function. | ||||
11866 | |||||
11867 | if (isa<TagDecl>(Target)) { | ||||
11868 | // No conflict between a tag and a non-tag. | ||||
11869 | if (!Tag) return false; | ||||
11870 | |||||
11871 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||
11872 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||
11873 | Diag(Tag->getLocation(), diag::note_using_decl_conflict); | ||||
11874 | BUD->setInvalidDecl(); | ||||
11875 | return true; | ||||
11876 | } | ||||
11877 | |||||
11878 | // No conflict between a tag and a non-tag. | ||||
11879 | if (!NonTag) return false; | ||||
11880 | |||||
11881 | Diag(BUD->getLocation(), diag::err_using_decl_conflict); | ||||
11882 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||
11883 | Diag(NonTag->getLocation(), diag::note_using_decl_conflict); | ||||
11884 | BUD->setInvalidDecl(); | ||||
11885 | return true; | ||||
11886 | } | ||||
11887 | |||||
11888 | /// Determine whether a direct base class is a virtual base class. | ||||
11889 | static bool isVirtualDirectBase(CXXRecordDecl *Derived, CXXRecordDecl *Base) { | ||||
11890 | if (!Derived->getNumVBases()) | ||||
11891 | return false; | ||||
11892 | for (auto &B : Derived->bases()) | ||||
11893 | if (B.getType()->getAsCXXRecordDecl() == Base) | ||||
11894 | return B.isVirtual(); | ||||
11895 | llvm_unreachable("not a direct base class")::llvm::llvm_unreachable_internal("not a direct base class", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11895); | ||||
11896 | } | ||||
11897 | |||||
11898 | /// Builds a shadow declaration corresponding to a 'using' declaration. | ||||
11899 | UsingShadowDecl *Sema::BuildUsingShadowDecl(Scope *S, BaseUsingDecl *BUD, | ||||
11900 | NamedDecl *Orig, | ||||
11901 | UsingShadowDecl *PrevDecl) { | ||||
11902 | // If we resolved to another shadow declaration, just coalesce them. | ||||
11903 | NamedDecl *Target = Orig; | ||||
11904 | if (isa<UsingShadowDecl>(Target)) { | ||||
11905 | Target = cast<UsingShadowDecl>(Target)->getTargetDecl(); | ||||
11906 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 11906, __extension__ __PRETTY_FUNCTION__)); | ||||
11907 | } | ||||
11908 | |||||
11909 | NamedDecl *NonTemplateTarget = Target; | ||||
11910 | if (auto *TargetTD = dyn_cast<TemplateDecl>(Target)) | ||||
11911 | NonTemplateTarget = TargetTD->getTemplatedDecl(); | ||||
11912 | |||||
11913 | UsingShadowDecl *Shadow; | ||||
11914 | if (NonTemplateTarget && isa<CXXConstructorDecl>(NonTemplateTarget)) { | ||||
11915 | UsingDecl *Using = cast<UsingDecl>(BUD); | ||||
11916 | bool IsVirtualBase = | ||||
11917 | isVirtualDirectBase(cast<CXXRecordDecl>(CurContext), | ||||
11918 | Using->getQualifier()->getAsRecordDecl()); | ||||
11919 | Shadow = ConstructorUsingShadowDecl::Create( | ||||
11920 | Context, CurContext, Using->getLocation(), Using, Orig, IsVirtualBase); | ||||
11921 | } else { | ||||
11922 | Shadow = UsingShadowDecl::Create(Context, CurContext, BUD->getLocation(), | ||||
11923 | Target->getDeclName(), BUD, Target); | ||||
11924 | } | ||||
11925 | BUD->addShadowDecl(Shadow); | ||||
11926 | |||||
11927 | Shadow->setAccess(BUD->getAccess()); | ||||
11928 | if (Orig->isInvalidDecl() || BUD->isInvalidDecl()) | ||||
11929 | Shadow->setInvalidDecl(); | ||||
11930 | |||||
11931 | Shadow->setPreviousDecl(PrevDecl); | ||||
11932 | |||||
11933 | if (S) | ||||
11934 | PushOnScopeChains(Shadow, S); | ||||
11935 | else | ||||
11936 | CurContext->addDecl(Shadow); | ||||
11937 | |||||
11938 | |||||
11939 | return Shadow; | ||||
11940 | } | ||||
11941 | |||||
11942 | /// Hides a using shadow declaration. This is required by the current | ||||
11943 | /// using-decl implementation when a resolvable using declaration in a | ||||
11944 | /// class is followed by a declaration which would hide or override | ||||
11945 | /// one or more of the using decl's targets; for example: | ||||
11946 | /// | ||||
11947 | /// struct Base { void foo(int); }; | ||||
11948 | /// struct Derived : Base { | ||||
11949 | /// using Base::foo; | ||||
11950 | /// void foo(int); | ||||
11951 | /// }; | ||||
11952 | /// | ||||
11953 | /// The governing language is C++03 [namespace.udecl]p12: | ||||
11954 | /// | ||||
11955 | /// When a using-declaration brings names from a base class into a | ||||
11956 | /// derived class scope, member functions in the derived class | ||||
11957 | /// override and/or hide member functions with the same name and | ||||
11958 | /// parameter types in a base class (rather than conflicting). | ||||
11959 | /// | ||||
11960 | /// There are two ways to implement this: | ||||
11961 | /// (1) optimistically create shadow decls when they're not hidden | ||||
11962 | /// by existing declarations, or | ||||
11963 | /// (2) don't create any shadow decls (or at least don't make them | ||||
11964 | /// visible) until we've fully parsed/instantiated the class. | ||||
11965 | /// The problem with (1) is that we might have to retroactively remove | ||||
11966 | /// a shadow decl, which requires several O(n) operations because the | ||||
11967 | /// decl structures are (very reasonably) not designed for removal. | ||||
11968 | /// (2) avoids this but is very fiddly and phase-dependent. | ||||
11969 | void Sema::HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow) { | ||||
11970 | if (Shadow->getDeclName().getNameKind() == | ||||
11971 | DeclarationName::CXXConversionFunctionName) | ||||
11972 | cast<CXXRecordDecl>(Shadow->getDeclContext())->removeConversion(Shadow); | ||||
11973 | |||||
11974 | // Remove it from the DeclContext... | ||||
11975 | Shadow->getDeclContext()->removeDecl(Shadow); | ||||
11976 | |||||
11977 | // ...and the scope, if applicable... | ||||
11978 | if (S) { | ||||
11979 | S->RemoveDecl(Shadow); | ||||
11980 | IdResolver.RemoveDecl(Shadow); | ||||
11981 | } | ||||
11982 | |||||
11983 | // ...and the using decl. | ||||
11984 | Shadow->getIntroducer()->removeShadowDecl(Shadow); | ||||
11985 | |||||
11986 | // TODO: complain somehow if Shadow was used. It shouldn't | ||||
11987 | // be possible for this to happen, because...? | ||||
11988 | } | ||||
11989 | |||||
11990 | /// Find the base specifier for a base class with the given type. | ||||
11991 | static CXXBaseSpecifier *findDirectBaseWithType(CXXRecordDecl *Derived, | ||||
11992 | QualType DesiredBase, | ||||
11993 | bool &AnyDependentBases) { | ||||
11994 | // Check whether the named type is a direct base class. | ||||
11995 | CanQualType CanonicalDesiredBase = DesiredBase->getCanonicalTypeUnqualified() | ||||
11996 | .getUnqualifiedType(); | ||||
11997 | for (auto &Base : Derived->bases()) { | ||||
11998 | CanQualType BaseType = Base.getType()->getCanonicalTypeUnqualified(); | ||||
11999 | if (CanonicalDesiredBase == BaseType) | ||||
12000 | return &Base; | ||||
12001 | if (BaseType->isDependentType()) | ||||
12002 | AnyDependentBases = true; | ||||
12003 | } | ||||
12004 | return nullptr; | ||||
12005 | } | ||||
12006 | |||||
12007 | namespace { | ||||
12008 | class UsingValidatorCCC final : public CorrectionCandidateCallback { | ||||
12009 | public: | ||||
12010 | UsingValidatorCCC(bool HasTypenameKeyword, bool IsInstantiation, | ||||
12011 | NestedNameSpecifier *NNS, CXXRecordDecl *RequireMemberOf) | ||||
12012 | : HasTypenameKeyword(HasTypenameKeyword), | ||||
12013 | IsInstantiation(IsInstantiation), OldNNS(NNS), | ||||
12014 | RequireMemberOf(RequireMemberOf) {} | ||||
12015 | |||||
12016 | bool ValidateCandidate(const TypoCorrection &Candidate) override { | ||||
12017 | NamedDecl *ND = Candidate.getCorrectionDecl(); | ||||
12018 | |||||
12019 | // Keywords are not valid here. | ||||
12020 | if (!ND || isa<NamespaceDecl>(ND)) | ||||
12021 | return false; | ||||
12022 | |||||
12023 | // Completely unqualified names are invalid for a 'using' declaration. | ||||
12024 | if (Candidate.WillReplaceSpecifier() && !Candidate.getCorrectionSpecifier()) | ||||
12025 | return false; | ||||
12026 | |||||
12027 | // FIXME: Don't correct to a name that CheckUsingDeclRedeclaration would | ||||
12028 | // reject. | ||||
12029 | |||||
12030 | if (RequireMemberOf) { | ||||
12031 | auto *FoundRecord = dyn_cast<CXXRecordDecl>(ND); | ||||
12032 | if (FoundRecord && FoundRecord->isInjectedClassName()) { | ||||
12033 | // No-one ever wants a using-declaration to name an injected-class-name | ||||
12034 | // of a base class, unless they're declaring an inheriting constructor. | ||||
12035 | ASTContext &Ctx = ND->getASTContext(); | ||||
12036 | if (!Ctx.getLangOpts().CPlusPlus11) | ||||
12037 | return false; | ||||
12038 | QualType FoundType = Ctx.getRecordType(FoundRecord); | ||||
12039 | |||||
12040 | // Check that the injected-class-name is named as a member of its own | ||||
12041 | // type; we don't want to suggest 'using Derived::Base;', since that | ||||
12042 | // means something else. | ||||
12043 | NestedNameSpecifier *Specifier = | ||||
12044 | Candidate.WillReplaceSpecifier() | ||||
12045 | ? Candidate.getCorrectionSpecifier() | ||||
12046 | : OldNNS; | ||||
12047 | if (!Specifier->getAsType() || | ||||
12048 | !Ctx.hasSameType(QualType(Specifier->getAsType(), 0), FoundType)) | ||||
12049 | return false; | ||||
12050 | |||||
12051 | // Check that this inheriting constructor declaration actually names a | ||||
12052 | // direct base class of the current class. | ||||
12053 | bool AnyDependentBases = false; | ||||
12054 | if (!findDirectBaseWithType(RequireMemberOf, | ||||
12055 | Ctx.getRecordType(FoundRecord), | ||||
12056 | AnyDependentBases) && | ||||
12057 | !AnyDependentBases) | ||||
12058 | return false; | ||||
12059 | } else { | ||||
12060 | auto *RD = dyn_cast<CXXRecordDecl>(ND->getDeclContext()); | ||||
12061 | if (!RD || RequireMemberOf->isProvablyNotDerivedFrom(RD)) | ||||
12062 | return false; | ||||
12063 | |||||
12064 | // FIXME: Check that the base class member is accessible? | ||||
12065 | } | ||||
12066 | } else { | ||||
12067 | auto *FoundRecord = dyn_cast<CXXRecordDecl>(ND); | ||||
12068 | if (FoundRecord && FoundRecord->isInjectedClassName()) | ||||
12069 | return false; | ||||
12070 | } | ||||
12071 | |||||
12072 | if (isa<TypeDecl>(ND)) | ||||
12073 | return HasTypenameKeyword || !IsInstantiation; | ||||
12074 | |||||
12075 | return !HasTypenameKeyword; | ||||
12076 | } | ||||
12077 | |||||
12078 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||
12079 | return std::make_unique<UsingValidatorCCC>(*this); | ||||
12080 | } | ||||
12081 | |||||
12082 | private: | ||||
12083 | bool HasTypenameKeyword; | ||||
12084 | bool IsInstantiation; | ||||
12085 | NestedNameSpecifier *OldNNS; | ||||
12086 | CXXRecordDecl *RequireMemberOf; | ||||
12087 | }; | ||||
12088 | } // end anonymous namespace | ||||
12089 | |||||
12090 | /// Remove decls we can't actually see from a lookup being used to declare | ||||
12091 | /// shadow using decls. | ||||
12092 | /// | ||||
12093 | /// \param S - The scope of the potential shadow decl | ||||
12094 | /// \param Previous - The lookup of a potential shadow decl's name. | ||||
12095 | void Sema::FilterUsingLookup(Scope *S, LookupResult &Previous) { | ||||
12096 | // It is really dumb that we have to do this. | ||||
12097 | LookupResult::Filter F = Previous.makeFilter(); | ||||
12098 | while (F.hasNext()) { | ||||
12099 | NamedDecl *D = F.next(); | ||||
12100 | if (!isDeclInScope(D, CurContext, S)) | ||||
12101 | F.erase(); | ||||
12102 | // If we found a local extern declaration that's not ordinarily visible, | ||||
12103 | // and this declaration is being added to a non-block scope, ignore it. | ||||
12104 | // We're only checking for scope conflicts here, not also for violations | ||||
12105 | // of the linkage rules. | ||||
12106 | else if (!CurContext->isFunctionOrMethod() && D->isLocalExternDecl() && | ||||
12107 | !(D->getIdentifierNamespace() & Decl::IDNS_Ordinary)) | ||||
12108 | F.erase(); | ||||
12109 | } | ||||
12110 | F.done(); | ||||
12111 | } | ||||
12112 | |||||
12113 | /// Builds a using declaration. | ||||
12114 | /// | ||||
12115 | /// \param IsInstantiation - Whether this call arises from an | ||||
12116 | /// instantiation of an unresolved using declaration. We treat | ||||
12117 | /// the lookup differently for these declarations. | ||||
12118 | NamedDecl *Sema::BuildUsingDeclaration( | ||||
12119 | Scope *S, AccessSpecifier AS, SourceLocation UsingLoc, | ||||
12120 | bool HasTypenameKeyword, SourceLocation TypenameLoc, CXXScopeSpec &SS, | ||||
12121 | DeclarationNameInfo NameInfo, SourceLocation EllipsisLoc, | ||||
12122 | const ParsedAttributesView &AttrList, bool IsInstantiation, | ||||
12123 | bool IsUsingIfExists) { | ||||
12124 | assert(!SS.isInvalid() && "Invalid CXXScopeSpec.")(static_cast <bool> (!SS.isInvalid() && "Invalid CXXScopeSpec." ) ? void (0) : __assert_fail ("!SS.isInvalid() && \"Invalid CXXScopeSpec.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12124, __extension__ __PRETTY_FUNCTION__)); | ||||
12125 | SourceLocation IdentLoc = NameInfo.getLoc(); | ||||
12126 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12126, __extension__ __PRETTY_FUNCTION__)); | ||||
12127 | |||||
12128 | // FIXME: We ignore attributes for now. | ||||
12129 | |||||
12130 | // For an inheriting constructor declaration, the name of the using | ||||
12131 | // declaration is the name of a constructor in this class, not in the | ||||
12132 | // base class. | ||||
12133 | DeclarationNameInfo UsingName = NameInfo; | ||||
12134 | if (UsingName.getName().getNameKind() == DeclarationName::CXXConstructorName) | ||||
12135 | if (auto *RD = dyn_cast<CXXRecordDecl>(CurContext)) | ||||
12136 | UsingName.setName(Context.DeclarationNames.getCXXConstructorName( | ||||
12137 | Context.getCanonicalType(Context.getRecordType(RD)))); | ||||
12138 | |||||
12139 | // Do the redeclaration lookup in the current scope. | ||||
12140 | LookupResult Previous(*this, UsingName, LookupUsingDeclName, | ||||
12141 | ForVisibleRedeclaration); | ||||
12142 | Previous.setHideTags(false); | ||||
12143 | if (S) { | ||||
12144 | LookupName(Previous, S); | ||||
12145 | |||||
12146 | FilterUsingLookup(S, Previous); | ||||
12147 | } else { | ||||
12148 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12148, __extension__ __PRETTY_FUNCTION__)); | ||||
12149 | if (CurContext->isRecord()) | ||||
12150 | LookupQualifiedName(Previous, CurContext); | ||||
12151 | else { | ||||
12152 | // No redeclaration check is needed here; in non-member contexts we | ||||
12153 | // diagnosed all possible conflicts with other using-declarations when | ||||
12154 | // building the template: | ||||
12155 | // | ||||
12156 | // For a dependent non-type using declaration, the only valid case is | ||||
12157 | // if we instantiate to a single enumerator. We check for conflicts | ||||
12158 | // between shadow declarations we introduce, and we check in the template | ||||
12159 | // definition for conflicts between a non-type using declaration and any | ||||
12160 | // other declaration, which together covers all cases. | ||||
12161 | // | ||||
12162 | // A dependent typename using declaration will never successfully | ||||
12163 | // instantiate, since it will always name a class member, so we reject | ||||
12164 | // that in the template definition. | ||||
12165 | } | ||||
12166 | } | ||||
12167 | |||||
12168 | // Check for invalid redeclarations. | ||||
12169 | if (CheckUsingDeclRedeclaration(UsingLoc, HasTypenameKeyword, | ||||
12170 | SS, IdentLoc, Previous)) | ||||
12171 | return nullptr; | ||||
12172 | |||||
12173 | // 'using_if_exists' doesn't make sense on an inherited constructor. | ||||
12174 | if (IsUsingIfExists && UsingName.getName().getNameKind() == | ||||
12175 | DeclarationName::CXXConstructorName) { | ||||
12176 | Diag(UsingLoc, diag::err_using_if_exists_on_ctor); | ||||
12177 | return nullptr; | ||||
12178 | } | ||||
12179 | |||||
12180 | DeclContext *LookupContext = computeDeclContext(SS); | ||||
12181 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | ||||
12182 | if (!LookupContext || EllipsisLoc.isValid()) { | ||||
12183 | NamedDecl *D; | ||||
12184 | // Dependent scope, or an unexpanded pack | ||||
12185 | if (!LookupContext && CheckUsingDeclQualifier(UsingLoc, HasTypenameKeyword, | ||||
12186 | SS, NameInfo, IdentLoc)) | ||||
12187 | return nullptr; | ||||
12188 | |||||
12189 | if (HasTypenameKeyword) { | ||||
12190 | // FIXME: not all declaration name kinds are legal here | ||||
12191 | D = UnresolvedUsingTypenameDecl::Create(Context, CurContext, | ||||
12192 | UsingLoc, TypenameLoc, | ||||
12193 | QualifierLoc, | ||||
12194 | IdentLoc, NameInfo.getName(), | ||||
12195 | EllipsisLoc); | ||||
12196 | } else { | ||||
12197 | D = UnresolvedUsingValueDecl::Create(Context, CurContext, UsingLoc, | ||||
12198 | QualifierLoc, NameInfo, EllipsisLoc); | ||||
12199 | } | ||||
12200 | D->setAccess(AS); | ||||
12201 | CurContext->addDecl(D); | ||||
12202 | ProcessDeclAttributeList(S, D, AttrList); | ||||
12203 | return D; | ||||
12204 | } | ||||
12205 | |||||
12206 | auto Build = [&](bool Invalid) { | ||||
12207 | UsingDecl *UD = | ||||
12208 | UsingDecl::Create(Context, CurContext, UsingLoc, QualifierLoc, | ||||
12209 | UsingName, HasTypenameKeyword); | ||||
12210 | UD->setAccess(AS); | ||||
12211 | CurContext->addDecl(UD); | ||||
12212 | ProcessDeclAttributeList(S, UD, AttrList); | ||||
12213 | UD->setInvalidDecl(Invalid); | ||||
12214 | return UD; | ||||
12215 | }; | ||||
12216 | auto BuildInvalid = [&]{ return Build(true); }; | ||||
12217 | auto BuildValid = [&]{ return Build(false); }; | ||||
12218 | |||||
12219 | if (RequireCompleteDeclContext(SS, LookupContext)) | ||||
12220 | return BuildInvalid(); | ||||
12221 | |||||
12222 | // Look up the target name. | ||||
12223 | LookupResult R(*this, NameInfo, LookupOrdinaryName); | ||||
12224 | |||||
12225 | // Unlike most lookups, we don't always want to hide tag | ||||
12226 | // declarations: tag names are visible through the using declaration | ||||
12227 | // even if hidden by ordinary names, *except* in a dependent context | ||||
12228 | // where it's important for the sanity of two-phase lookup. | ||||
12229 | if (!IsInstantiation) | ||||
12230 | R.setHideTags(false); | ||||
12231 | |||||
12232 | // For the purposes of this lookup, we have a base object type | ||||
12233 | // equal to that of the current context. | ||||
12234 | if (CurContext->isRecord()) { | ||||
12235 | R.setBaseObjectType( | ||||
12236 | Context.getTypeDeclType(cast<CXXRecordDecl>(CurContext))); | ||||
12237 | } | ||||
12238 | |||||
12239 | LookupQualifiedName(R, LookupContext); | ||||
12240 | |||||
12241 | // Validate the context, now we have a lookup | ||||
12242 | if (CheckUsingDeclQualifier(UsingLoc, HasTypenameKeyword, SS, NameInfo, | ||||
12243 | IdentLoc, &R)) | ||||
12244 | return nullptr; | ||||
12245 | |||||
12246 | if (R.empty() && IsUsingIfExists) | ||||
12247 | R.addDecl(UnresolvedUsingIfExistsDecl::Create(Context, CurContext, UsingLoc, | ||||
12248 | UsingName.getName()), | ||||
12249 | AS_public); | ||||
12250 | |||||
12251 | // Try to correct typos if possible. If constructor name lookup finds no | ||||
12252 | // results, that means the named class has no explicit constructors, and we | ||||
12253 | // suppressed declaring implicit ones (probably because it's dependent or | ||||
12254 | // invalid). | ||||
12255 | if (R.empty() && | ||||
12256 | NameInfo.getName().getNameKind() != DeclarationName::CXXConstructorName) { | ||||
12257 | // HACK 2017-01-08: Work around an issue with libstdc++'s detection of | ||||
12258 | // ::gets. Sometimes it believes that glibc provides a ::gets in cases where | ||||
12259 | // it does not. The issue was fixed in libstdc++ 6.3 (2016-12-21) and later. | ||||
12260 | auto *II = NameInfo.getName().getAsIdentifierInfo(); | ||||
12261 | if (getLangOpts().CPlusPlus14 && II && II->isStr("gets") && | ||||
12262 | CurContext->isStdNamespace() && | ||||
12263 | isa<TranslationUnitDecl>(LookupContext) && | ||||
12264 | getSourceManager().isInSystemHeader(UsingLoc)) | ||||
12265 | return nullptr; | ||||
12266 | UsingValidatorCCC CCC(HasTypenameKeyword, IsInstantiation, SS.getScopeRep(), | ||||
12267 | dyn_cast<CXXRecordDecl>(CurContext)); | ||||
12268 | if (TypoCorrection Corrected = | ||||
12269 | CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), S, &SS, CCC, | ||||
12270 | CTK_ErrorRecovery)) { | ||||
12271 | // We reject candidates where DroppedSpecifier == true, hence the | ||||
12272 | // literal '0' below. | ||||
12273 | diagnoseTypo(Corrected, PDiag(diag::err_no_member_suggest) | ||||
12274 | << NameInfo.getName() << LookupContext << 0 | ||||
12275 | << SS.getRange()); | ||||
12276 | |||||
12277 | // If we picked a correction with no attached Decl we can't do anything | ||||
12278 | // useful with it, bail out. | ||||
12279 | NamedDecl *ND = Corrected.getCorrectionDecl(); | ||||
12280 | if (!ND) | ||||
12281 | return BuildInvalid(); | ||||
12282 | |||||
12283 | // If we corrected to an inheriting constructor, handle it as one. | ||||
12284 | auto *RD = dyn_cast<CXXRecordDecl>(ND); | ||||
12285 | if (RD && RD->isInjectedClassName()) { | ||||
12286 | // The parent of the injected class name is the class itself. | ||||
12287 | RD = cast<CXXRecordDecl>(RD->getParent()); | ||||
12288 | |||||
12289 | // Fix up the information we'll use to build the using declaration. | ||||
12290 | if (Corrected.WillReplaceSpecifier()) { | ||||
12291 | NestedNameSpecifierLocBuilder Builder; | ||||
12292 | Builder.MakeTrivial(Context, Corrected.getCorrectionSpecifier(), | ||||
12293 | QualifierLoc.getSourceRange()); | ||||
12294 | QualifierLoc = Builder.getWithLocInContext(Context); | ||||
12295 | } | ||||
12296 | |||||
12297 | // In this case, the name we introduce is the name of a derived class | ||||
12298 | // constructor. | ||||
12299 | auto *CurClass = cast<CXXRecordDecl>(CurContext); | ||||
12300 | UsingName.setName(Context.DeclarationNames.getCXXConstructorName( | ||||
12301 | Context.getCanonicalType(Context.getRecordType(CurClass)))); | ||||
12302 | UsingName.setNamedTypeInfo(nullptr); | ||||
12303 | for (auto *Ctor : LookupConstructors(RD)) | ||||
12304 | R.addDecl(Ctor); | ||||
12305 | R.resolveKind(); | ||||
12306 | } else { | ||||
12307 | // FIXME: Pick up all the declarations if we found an overloaded | ||||
12308 | // function. | ||||
12309 | UsingName.setName(ND->getDeclName()); | ||||
12310 | R.addDecl(ND); | ||||
12311 | } | ||||
12312 | } else { | ||||
12313 | Diag(IdentLoc, diag::err_no_member) | ||||
12314 | << NameInfo.getName() << LookupContext << SS.getRange(); | ||||
12315 | return BuildInvalid(); | ||||
12316 | } | ||||
12317 | } | ||||
12318 | |||||
12319 | if (R.isAmbiguous()) | ||||
12320 | return BuildInvalid(); | ||||
12321 | |||||
12322 | if (HasTypenameKeyword) { | ||||
12323 | // If we asked for a typename and got a non-type decl, error out. | ||||
12324 | if (!R.getAsSingle<TypeDecl>() && | ||||
12325 | !R.getAsSingle<UnresolvedUsingIfExistsDecl>()) { | ||||
12326 | Diag(IdentLoc, diag::err_using_typename_non_type); | ||||
12327 | for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) | ||||
12328 | Diag((*I)->getUnderlyingDecl()->getLocation(), | ||||
12329 | diag::note_using_decl_target); | ||||
12330 | return BuildInvalid(); | ||||
12331 | } | ||||
12332 | } else { | ||||
12333 | // If we asked for a non-typename and we got a type, error out, | ||||
12334 | // but only if this is an instantiation of an unresolved using | ||||
12335 | // decl. Otherwise just silently find the type name. | ||||
12336 | if (IsInstantiation && R.getAsSingle<TypeDecl>()) { | ||||
12337 | Diag(IdentLoc, diag::err_using_dependent_value_is_type); | ||||
12338 | Diag(R.getFoundDecl()->getLocation(), diag::note_using_decl_target); | ||||
12339 | return BuildInvalid(); | ||||
12340 | } | ||||
12341 | } | ||||
12342 | |||||
12343 | // C++14 [namespace.udecl]p6: | ||||
12344 | // A using-declaration shall not name a namespace. | ||||
12345 | if (R.getAsSingle<NamespaceDecl>()) { | ||||
12346 | Diag(IdentLoc, diag::err_using_decl_can_not_refer_to_namespace) | ||||
12347 | << SS.getRange(); | ||||
12348 | return BuildInvalid(); | ||||
12349 | } | ||||
12350 | |||||
12351 | UsingDecl *UD = BuildValid(); | ||||
12352 | |||||
12353 | // Some additional rules apply to inheriting constructors. | ||||
12354 | if (UsingName.getName().getNameKind() == | ||||
12355 | DeclarationName::CXXConstructorName) { | ||||
12356 | // Suppress access diagnostics; the access check is instead performed at the | ||||
12357 | // point of use for an inheriting constructor. | ||||
12358 | R.suppressDiagnostics(); | ||||
12359 | if (CheckInheritingConstructorUsingDecl(UD)) | ||||
12360 | return UD; | ||||
12361 | } | ||||
12362 | |||||
12363 | for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) { | ||||
12364 | UsingShadowDecl *PrevDecl = nullptr; | ||||
12365 | if (!CheckUsingShadowDecl(UD, *I, Previous, PrevDecl)) | ||||
12366 | BuildUsingShadowDecl(S, UD, *I, PrevDecl); | ||||
12367 | } | ||||
12368 | |||||
12369 | return UD; | ||||
12370 | } | ||||
12371 | |||||
12372 | NamedDecl *Sema::BuildUsingEnumDeclaration(Scope *S, AccessSpecifier AS, | ||||
12373 | SourceLocation UsingLoc, | ||||
12374 | SourceLocation EnumLoc, | ||||
12375 | SourceLocation NameLoc, | ||||
12376 | EnumDecl *ED) { | ||||
12377 | bool Invalid = false; | ||||
12378 | |||||
12379 | if (CurContext->getRedeclContext()->isRecord()) { | ||||
12380 | /// In class scope, check if this is a duplicate, for better a diagnostic. | ||||
12381 | DeclarationNameInfo UsingEnumName(ED->getDeclName(), NameLoc); | ||||
12382 | LookupResult Previous(*this, UsingEnumName, LookupUsingDeclName, | ||||
12383 | ForVisibleRedeclaration); | ||||
12384 | |||||
12385 | LookupName(Previous, S); | ||||
12386 | |||||
12387 | for (NamedDecl *D : Previous) | ||||
12388 | if (UsingEnumDecl *UED = dyn_cast<UsingEnumDecl>(D)) | ||||
12389 | if (UED->getEnumDecl() == ED) { | ||||
12390 | Diag(UsingLoc, diag::err_using_enum_decl_redeclaration) | ||||
12391 | << SourceRange(EnumLoc, NameLoc); | ||||
12392 | Diag(D->getLocation(), diag::note_using_enum_decl) << 1; | ||||
12393 | Invalid = true; | ||||
12394 | break; | ||||
12395 | } | ||||
12396 | } | ||||
12397 | |||||
12398 | if (RequireCompleteEnumDecl(ED, NameLoc)) | ||||
12399 | Invalid = true; | ||||
12400 | |||||
12401 | UsingEnumDecl *UD = UsingEnumDecl::Create(Context, CurContext, UsingLoc, | ||||
12402 | EnumLoc, NameLoc, ED); | ||||
12403 | UD->setAccess(AS); | ||||
12404 | CurContext->addDecl(UD); | ||||
12405 | |||||
12406 | if (Invalid) { | ||||
12407 | UD->setInvalidDecl(); | ||||
12408 | return UD; | ||||
12409 | } | ||||
12410 | |||||
12411 | // Create the shadow decls for each enumerator | ||||
12412 | for (EnumConstantDecl *EC : ED->enumerators()) { | ||||
12413 | UsingShadowDecl *PrevDecl = nullptr; | ||||
12414 | DeclarationNameInfo DNI(EC->getDeclName(), EC->getLocation()); | ||||
12415 | LookupResult Previous(*this, DNI, LookupOrdinaryName, | ||||
12416 | ForVisibleRedeclaration); | ||||
12417 | LookupName(Previous, S); | ||||
12418 | FilterUsingLookup(S, Previous); | ||||
12419 | |||||
12420 | if (!CheckUsingShadowDecl(UD, EC, Previous, PrevDecl)) | ||||
12421 | BuildUsingShadowDecl(S, UD, EC, PrevDecl); | ||||
12422 | } | ||||
12423 | |||||
12424 | return UD; | ||||
12425 | } | ||||
12426 | |||||
12427 | NamedDecl *Sema::BuildUsingPackDecl(NamedDecl *InstantiatedFrom, | ||||
12428 | ArrayRef<NamedDecl *> Expansions) { | ||||
12429 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12431, __extension__ __PRETTY_FUNCTION__)) | ||||
12430 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12431, __extension__ __PRETTY_FUNCTION__)) | ||||
12431 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12431, __extension__ __PRETTY_FUNCTION__)); | ||||
12432 | |||||
12433 | auto *UPD = | ||||
12434 | UsingPackDecl::Create(Context, CurContext, InstantiatedFrom, Expansions); | ||||
12435 | UPD->setAccess(InstantiatedFrom->getAccess()); | ||||
12436 | CurContext->addDecl(UPD); | ||||
12437 | return UPD; | ||||
12438 | } | ||||
12439 | |||||
12440 | /// Additional checks for a using declaration referring to a constructor name. | ||||
12441 | bool Sema::CheckInheritingConstructorUsingDecl(UsingDecl *UD) { | ||||
12442 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12442, __extension__ __PRETTY_FUNCTION__)); | ||||
12443 | |||||
12444 | const Type *SourceType = UD->getQualifier()->getAsType(); | ||||
12445 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12446, __extension__ __PRETTY_FUNCTION__)) | ||||
12446 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12446, __extension__ __PRETTY_FUNCTION__)); | ||||
12447 | CXXRecordDecl *TargetClass = cast<CXXRecordDecl>(CurContext); | ||||
12448 | |||||
12449 | // Check whether the named type is a direct base class. | ||||
12450 | bool AnyDependentBases = false; | ||||
12451 | auto *Base = findDirectBaseWithType(TargetClass, QualType(SourceType, 0), | ||||
12452 | AnyDependentBases); | ||||
12453 | if (!Base && !AnyDependentBases) { | ||||
12454 | Diag(UD->getUsingLoc(), | ||||
12455 | diag::err_using_decl_constructor_not_in_direct_base) | ||||
12456 | << UD->getNameInfo().getSourceRange() | ||||
12457 | << QualType(SourceType, 0) << TargetClass; | ||||
12458 | UD->setInvalidDecl(); | ||||
12459 | return true; | ||||
12460 | } | ||||
12461 | |||||
12462 | if (Base) | ||||
12463 | Base->setInheritConstructors(); | ||||
12464 | |||||
12465 | return false; | ||||
12466 | } | ||||
12467 | |||||
12468 | /// Checks that the given using declaration is not an invalid | ||||
12469 | /// redeclaration. Note that this is checking only for the using decl | ||||
12470 | /// itself, not for any ill-formedness among the UsingShadowDecls. | ||||
12471 | bool Sema::CheckUsingDeclRedeclaration(SourceLocation UsingLoc, | ||||
12472 | bool HasTypenameKeyword, | ||||
12473 | const CXXScopeSpec &SS, | ||||
12474 | SourceLocation NameLoc, | ||||
12475 | const LookupResult &Prev) { | ||||
12476 | NestedNameSpecifier *Qual = SS.getScopeRep(); | ||||
12477 | |||||
12478 | // C++03 [namespace.udecl]p8: | ||||
12479 | // C++0x [namespace.udecl]p10: | ||||
12480 | // A using-declaration is a declaration and can therefore be used | ||||
12481 | // repeatedly where (and only where) multiple declarations are | ||||
12482 | // allowed. | ||||
12483 | // | ||||
12484 | // That's in non-member contexts. | ||||
12485 | if (!CurContext->getRedeclContext()->isRecord()) { | ||||
12486 | // A dependent qualifier outside a class can only ever resolve to an | ||||
12487 | // enumeration type. Therefore it conflicts with any other non-type | ||||
12488 | // declaration in the same scope. | ||||
12489 | // FIXME: How should we check for dependent type-type conflicts at block | ||||
12490 | // scope? | ||||
12491 | if (Qual->isDependent() && !HasTypenameKeyword) { | ||||
12492 | for (auto *D : Prev) { | ||||
12493 | if (!isa<TypeDecl>(D) && !isa<UsingDecl>(D) && !isa<UsingPackDecl>(D)) { | ||||
12494 | bool OldCouldBeEnumerator = | ||||
12495 | isa<UnresolvedUsingValueDecl>(D) || isa<EnumConstantDecl>(D); | ||||
12496 | Diag(NameLoc, | ||||
12497 | OldCouldBeEnumerator ? diag::err_redefinition | ||||
12498 | : diag::err_redefinition_different_kind) | ||||
12499 | << Prev.getLookupName(); | ||||
12500 | Diag(D->getLocation(), diag::note_previous_definition); | ||||
12501 | return true; | ||||
12502 | } | ||||
12503 | } | ||||
12504 | } | ||||
12505 | return false; | ||||
12506 | } | ||||
12507 | |||||
12508 | const NestedNameSpecifier *CNNS = | ||||
12509 | Context.getCanonicalNestedNameSpecifier(Qual); | ||||
12510 | for (LookupResult::iterator I = Prev.begin(), E = Prev.end(); I != E; ++I) { | ||||
12511 | NamedDecl *D = *I; | ||||
12512 | |||||
12513 | bool DTypename; | ||||
12514 | NestedNameSpecifier *DQual; | ||||
12515 | if (UsingDecl *UD = dyn_cast<UsingDecl>(D)) { | ||||
12516 | DTypename = UD->hasTypename(); | ||||
12517 | DQual = UD->getQualifier(); | ||||
12518 | } else if (UnresolvedUsingValueDecl *UD | ||||
12519 | = dyn_cast<UnresolvedUsingValueDecl>(D)) { | ||||
12520 | DTypename = false; | ||||
12521 | DQual = UD->getQualifier(); | ||||
12522 | } else if (UnresolvedUsingTypenameDecl *UD | ||||
12523 | = dyn_cast<UnresolvedUsingTypenameDecl>(D)) { | ||||
12524 | DTypename = true; | ||||
12525 | DQual = UD->getQualifier(); | ||||
12526 | } else continue; | ||||
12527 | |||||
12528 | // using decls differ if one says 'typename' and the other doesn't. | ||||
12529 | // FIXME: non-dependent using decls? | ||||
12530 | if (HasTypenameKeyword != DTypename) continue; | ||||
12531 | |||||
12532 | // using decls differ if they name different scopes (but note that | ||||
12533 | // template instantiation can cause this check to trigger when it | ||||
12534 | // didn't before instantiation). | ||||
12535 | if (CNNS != Context.getCanonicalNestedNameSpecifier(DQual)) | ||||
12536 | continue; | ||||
12537 | |||||
12538 | Diag(NameLoc, diag::err_using_decl_redeclaration) << SS.getRange(); | ||||
12539 | Diag(D->getLocation(), diag::note_using_decl) << 1; | ||||
12540 | return true; | ||||
12541 | } | ||||
12542 | |||||
12543 | return false; | ||||
12544 | } | ||||
12545 | |||||
12546 | /// Checks that the given nested-name qualifier used in a using decl | ||||
12547 | /// in the current context is appropriately related to the current | ||||
12548 | /// scope. If an error is found, diagnoses it and returns true. | ||||
12549 | /// R is nullptr, if the caller has not (yet) done a lookup, otherwise it's the | ||||
12550 | /// result of that lookup. UD is likewise nullptr, except when we have an | ||||
12551 | /// already-populated UsingDecl whose shadow decls contain the same information | ||||
12552 | /// (i.e. we're instantiating a UsingDecl with non-dependent scope). | ||||
12553 | bool Sema::CheckUsingDeclQualifier(SourceLocation UsingLoc, bool HasTypename, | ||||
12554 | const CXXScopeSpec &SS, | ||||
12555 | const DeclarationNameInfo &NameInfo, | ||||
12556 | SourceLocation NameLoc, | ||||
12557 | const LookupResult *R, const UsingDecl *UD) { | ||||
12558 | DeclContext *NamedContext = computeDeclContext(SS); | ||||
12559 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12560, __extension__ __PRETTY_FUNCTION__)) | ||||
12560 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12560, __extension__ __PRETTY_FUNCTION__)); | ||||
12561 | |||||
12562 | // C++ 20 permits using an enumerator that does not have a class-hierarchy | ||||
12563 | // relationship. | ||||
12564 | bool Cxx20Enumerator = false; | ||||
12565 | if (NamedContext) { | ||||
12566 | EnumConstantDecl *EC = nullptr; | ||||
12567 | if (R) | ||||
12568 | EC = R->getAsSingle<EnumConstantDecl>(); | ||||
12569 | else if (UD && UD->shadow_size() == 1) | ||||
12570 | EC = dyn_cast<EnumConstantDecl>(UD->shadow_begin()->getTargetDecl()); | ||||
12571 | if (EC) | ||||
12572 | Cxx20Enumerator = getLangOpts().CPlusPlus20; | ||||
12573 | |||||
12574 | if (auto *ED = dyn_cast<EnumDecl>(NamedContext)) { | ||||
12575 | // C++14 [namespace.udecl]p7: | ||||
12576 | // A using-declaration shall not name a scoped enumerator. | ||||
12577 | // C++20 p1099 permits enumerators. | ||||
12578 | if (EC && R && ED->isScoped()) | ||||
12579 | Diag(SS.getBeginLoc(), | ||||
12580 | getLangOpts().CPlusPlus20 | ||||
12581 | ? diag::warn_cxx17_compat_using_decl_scoped_enumerator | ||||
12582 | : diag::ext_using_decl_scoped_enumerator) | ||||
12583 | << SS.getRange(); | ||||
12584 | |||||
12585 | // We want to consider the scope of the enumerator | ||||
12586 | NamedContext = ED->getDeclContext(); | ||||
12587 | } | ||||
12588 | } | ||||
12589 | |||||
12590 | if (!CurContext->isRecord()) { | ||||
12591 | // C++03 [namespace.udecl]p3: | ||||
12592 | // C++0x [namespace.udecl]p8: | ||||
12593 | // A using-declaration for a class member shall be a member-declaration. | ||||
12594 | // C++20 [namespace.udecl]p7 | ||||
12595 | // ... other than an enumerator ... | ||||
12596 | |||||
12597 | // If we weren't able to compute a valid scope, it might validly be a | ||||
12598 | // dependent class or enumeration scope. If we have a 'typename' keyword, | ||||
12599 | // the scope must resolve to a class type. | ||||
12600 | if (NamedContext ? !NamedContext->getRedeclContext()->isRecord() | ||||
12601 | : !HasTypename) | ||||
12602 | return false; // OK | ||||
12603 | |||||
12604 | Diag(NameLoc, | ||||
12605 | Cxx20Enumerator | ||||
12606 | ? diag::warn_cxx17_compat_using_decl_class_member_enumerator | ||||
12607 | : diag::err_using_decl_can_not_refer_to_class_member) | ||||
12608 | << SS.getRange(); | ||||
12609 | |||||
12610 | if (Cxx20Enumerator) | ||||
12611 | return false; // OK | ||||
12612 | |||||
12613 | auto *RD = NamedContext | ||||
12614 | ? cast<CXXRecordDecl>(NamedContext->getRedeclContext()) | ||||
12615 | : nullptr; | ||||
12616 | if (RD && !RequireCompleteDeclContext(const_cast<CXXScopeSpec &>(SS), RD)) { | ||||
12617 | // See if there's a helpful fixit | ||||
12618 | |||||
12619 | if (!R) { | ||||
12620 | // We will have already diagnosed the problem on the template | ||||
12621 | // definition, Maybe we should do so again? | ||||
12622 | } else if (R->getAsSingle<TypeDecl>()) { | ||||
12623 | if (getLangOpts().CPlusPlus11) { | ||||
12624 | // Convert 'using X::Y;' to 'using Y = X::Y;'. | ||||
12625 | Diag(SS.getBeginLoc(), diag::note_using_decl_class_member_workaround) | ||||
12626 | << 0 // alias declaration | ||||
12627 | << FixItHint::CreateInsertion(SS.getBeginLoc(), | ||||
12628 | NameInfo.getName().getAsString() + | ||||
12629 | " = "); | ||||
12630 | } else { | ||||
12631 | // Convert 'using X::Y;' to 'typedef X::Y Y;'. | ||||
12632 | SourceLocation InsertLoc = getLocForEndOfToken(NameInfo.getEndLoc()); | ||||
12633 | Diag(InsertLoc, diag::note_using_decl_class_member_workaround) | ||||
12634 | << 1 // typedef declaration | ||||
12635 | << FixItHint::CreateReplacement(UsingLoc, "typedef") | ||||
12636 | << FixItHint::CreateInsertion( | ||||
12637 | InsertLoc, " " + NameInfo.getName().getAsString()); | ||||
12638 | } | ||||
12639 | } else if (R->getAsSingle<VarDecl>()) { | ||||
12640 | // Don't provide a fixit outside C++11 mode; we don't want to suggest | ||||
12641 | // repeating the type of the static data member here. | ||||
12642 | FixItHint FixIt; | ||||
12643 | if (getLangOpts().CPlusPlus11) { | ||||
12644 | // Convert 'using X::Y;' to 'auto &Y = X::Y;'. | ||||
12645 | FixIt = FixItHint::CreateReplacement( | ||||
12646 | UsingLoc, "auto &" + NameInfo.getName().getAsString() + " = "); | ||||
12647 | } | ||||
12648 | |||||
12649 | Diag(UsingLoc, diag::note_using_decl_class_member_workaround) | ||||
12650 | << 2 // reference declaration | ||||
12651 | << FixIt; | ||||
12652 | } else if (R->getAsSingle<EnumConstantDecl>()) { | ||||
12653 | // Don't provide a fixit outside C++11 mode; we don't want to suggest | ||||
12654 | // repeating the type of the enumeration here, and we can't do so if | ||||
12655 | // the type is anonymous. | ||||
12656 | FixItHint FixIt; | ||||
12657 | if (getLangOpts().CPlusPlus11) { | ||||
12658 | // Convert 'using X::Y;' to 'auto &Y = X::Y;'. | ||||
12659 | FixIt = FixItHint::CreateReplacement( | ||||
12660 | UsingLoc, | ||||
12661 | "constexpr auto " + NameInfo.getName().getAsString() + " = "); | ||||
12662 | } | ||||
12663 | |||||
12664 | Diag(UsingLoc, diag::note_using_decl_class_member_workaround) | ||||
12665 | << (getLangOpts().CPlusPlus11 ? 4 : 3) // const[expr] variable | ||||
12666 | << FixIt; | ||||
12667 | } | ||||
12668 | } | ||||
12669 | |||||
12670 | return true; // Fail | ||||
12671 | } | ||||
12672 | |||||
12673 | // If the named context is dependent, we can't decide much. | ||||
12674 | if (!NamedContext) { | ||||
12675 | // FIXME: in C++0x, we can diagnose if we can prove that the | ||||
12676 | // nested-name-specifier does not refer to a base class, which is | ||||
12677 | // still possible in some cases. | ||||
12678 | |||||
12679 | // Otherwise we have to conservatively report that things might be | ||||
12680 | // okay. | ||||
12681 | return false; | ||||
12682 | } | ||||
12683 | |||||
12684 | // The current scope is a record. | ||||
12685 | if (!NamedContext->isRecord()) { | ||||
12686 | // Ideally this would point at the last name in the specifier, | ||||
12687 | // but we don't have that level of source info. | ||||
12688 | Diag(SS.getBeginLoc(), | ||||
12689 | Cxx20Enumerator | ||||
12690 | ? diag::warn_cxx17_compat_using_decl_non_member_enumerator | ||||
12691 | : diag::err_using_decl_nested_name_specifier_is_not_class) | ||||
12692 | << SS.getScopeRep() << SS.getRange(); | ||||
12693 | |||||
12694 | if (Cxx20Enumerator) | ||||
12695 | return false; // OK | ||||
12696 | |||||
12697 | return true; | ||||
12698 | } | ||||
12699 | |||||
12700 | if (!NamedContext->isDependentContext() && | ||||
12701 | RequireCompleteDeclContext(const_cast<CXXScopeSpec&>(SS), NamedContext)) | ||||
12702 | return true; | ||||
12703 | |||||
12704 | if (getLangOpts().CPlusPlus11) { | ||||
12705 | // C++11 [namespace.udecl]p3: | ||||
12706 | // In a using-declaration used as a member-declaration, the | ||||
12707 | // nested-name-specifier shall name a base class of the class | ||||
12708 | // being defined. | ||||
12709 | |||||
12710 | if (cast<CXXRecordDecl>(CurContext)->isProvablyNotDerivedFrom( | ||||
12711 | cast<CXXRecordDecl>(NamedContext))) { | ||||
12712 | |||||
12713 | if (Cxx20Enumerator) { | ||||
12714 | Diag(NameLoc, diag::warn_cxx17_compat_using_decl_non_member_enumerator) | ||||
12715 | << SS.getRange(); | ||||
12716 | return false; | ||||
12717 | } | ||||
12718 | |||||
12719 | if (CurContext == NamedContext) { | ||||
12720 | Diag(SS.getBeginLoc(), | ||||
12721 | diag::err_using_decl_nested_name_specifier_is_current_class) | ||||
12722 | << SS.getRange(); | ||||
12723 | return !getLangOpts().CPlusPlus20; | ||||
12724 | } | ||||
12725 | |||||
12726 | if (!cast<CXXRecordDecl>(NamedContext)->isInvalidDecl()) { | ||||
12727 | Diag(SS.getBeginLoc(), | ||||
12728 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||
12729 | << SS.getScopeRep() << cast<CXXRecordDecl>(CurContext) | ||||
12730 | << SS.getRange(); | ||||
12731 | } | ||||
12732 | return true; | ||||
12733 | } | ||||
12734 | |||||
12735 | return false; | ||||
12736 | } | ||||
12737 | |||||
12738 | // C++03 [namespace.udecl]p4: | ||||
12739 | // A using-declaration used as a member-declaration shall refer | ||||
12740 | // to a member of a base class of the class being defined [etc.]. | ||||
12741 | |||||
12742 | // Salient point: SS doesn't have to name a base class as long as | ||||
12743 | // lookup only finds members from base classes. Therefore we can | ||||
12744 | // diagnose here only if we can prove that that can't happen, | ||||
12745 | // i.e. if the class hierarchies provably don't intersect. | ||||
12746 | |||||
12747 | // TODO: it would be nice if "definitely valid" results were cached | ||||
12748 | // in the UsingDecl and UsingShadowDecl so that these checks didn't | ||||
12749 | // need to be repeated. | ||||
12750 | |||||
12751 | llvm::SmallPtrSet<const CXXRecordDecl *, 4> Bases; | ||||
12752 | auto Collect = [&Bases](const CXXRecordDecl *Base) { | ||||
12753 | Bases.insert(Base); | ||||
12754 | return true; | ||||
12755 | }; | ||||
12756 | |||||
12757 | // Collect all bases. Return false if we find a dependent base. | ||||
12758 | if (!cast<CXXRecordDecl>(CurContext)->forallBases(Collect)) | ||||
12759 | return false; | ||||
12760 | |||||
12761 | // Returns true if the base is dependent or is one of the accumulated base | ||||
12762 | // classes. | ||||
12763 | auto IsNotBase = [&Bases](const CXXRecordDecl *Base) { | ||||
12764 | return !Bases.count(Base); | ||||
12765 | }; | ||||
12766 | |||||
12767 | // Return false if the class has a dependent base or if it or one | ||||
12768 | // of its bases is present in the base set of the current context. | ||||
12769 | if (Bases.count(cast<CXXRecordDecl>(NamedContext)) || | ||||
12770 | !cast<CXXRecordDecl>(NamedContext)->forallBases(IsNotBase)) | ||||
12771 | return false; | ||||
12772 | |||||
12773 | Diag(SS.getRange().getBegin(), | ||||
12774 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||
12775 | << SS.getScopeRep() | ||||
12776 | << cast<CXXRecordDecl>(CurContext) | ||||
12777 | << SS.getRange(); | ||||
12778 | |||||
12779 | return true; | ||||
12780 | } | ||||
12781 | |||||
12782 | Decl *Sema::ActOnAliasDeclaration(Scope *S, AccessSpecifier AS, | ||||
12783 | MultiTemplateParamsArg TemplateParamLists, | ||||
12784 | SourceLocation UsingLoc, UnqualifiedId &Name, | ||||
12785 | const ParsedAttributesView &AttrList, | ||||
12786 | TypeResult Type, Decl *DeclFromDeclSpec) { | ||||
12787 | // Skip up to the relevant declaration scope. | ||||
12788 | while (S->isTemplateParamScope()) | ||||
12789 | S = S->getParent(); | ||||
12790 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12791, __extension__ __PRETTY_FUNCTION__)) | ||||
12791 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12791, __extension__ __PRETTY_FUNCTION__)); | ||||
12792 | |||||
12793 | if (Type.isInvalid()) | ||||
12794 | return nullptr; | ||||
12795 | |||||
12796 | bool Invalid = false; | ||||
12797 | DeclarationNameInfo NameInfo = GetNameFromUnqualifiedId(Name); | ||||
12798 | TypeSourceInfo *TInfo = nullptr; | ||||
12799 | GetTypeFromParser(Type.get(), &TInfo); | ||||
12800 | |||||
12801 | if (DiagnoseClassNameShadow(CurContext, NameInfo)) | ||||
12802 | return nullptr; | ||||
12803 | |||||
12804 | if (DiagnoseUnexpandedParameterPack(Name.StartLocation, TInfo, | ||||
12805 | UPPC_DeclarationType)) { | ||||
12806 | Invalid = true; | ||||
12807 | TInfo = Context.getTrivialTypeSourceInfo(Context.IntTy, | ||||
12808 | TInfo->getTypeLoc().getBeginLoc()); | ||||
12809 | } | ||||
12810 | |||||
12811 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||
12812 | TemplateParamLists.size() | ||||
12813 | ? forRedeclarationInCurContext() | ||||
12814 | : ForVisibleRedeclaration); | ||||
12815 | LookupName(Previous, S); | ||||
12816 | |||||
12817 | // Warn about shadowing the name of a template parameter. | ||||
12818 | if (Previous.isSingleResult() && | ||||
12819 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||
12820 | DiagnoseTemplateParameterShadow(Name.StartLocation,Previous.getFoundDecl()); | ||||
12821 | Previous.clear(); | ||||
12822 | } | ||||
12823 | |||||
12824 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12825, __extension__ __PRETTY_FUNCTION__)) | ||||
12825 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12825, __extension__ __PRETTY_FUNCTION__)); | ||||
12826 | TypeAliasDecl *NewTD = TypeAliasDecl::Create(Context, CurContext, UsingLoc, | ||||
12827 | Name.StartLocation, | ||||
12828 | Name.Identifier, TInfo); | ||||
12829 | |||||
12830 | NewTD->setAccess(AS); | ||||
12831 | |||||
12832 | if (Invalid) | ||||
12833 | NewTD->setInvalidDecl(); | ||||
12834 | |||||
12835 | ProcessDeclAttributeList(S, NewTD, AttrList); | ||||
12836 | AddPragmaAttributes(S, NewTD); | ||||
12837 | |||||
12838 | CheckTypedefForVariablyModifiedType(S, NewTD); | ||||
12839 | Invalid |= NewTD->isInvalidDecl(); | ||||
12840 | |||||
12841 | bool Redeclaration = false; | ||||
12842 | |||||
12843 | NamedDecl *NewND; | ||||
12844 | if (TemplateParamLists.size()) { | ||||
12845 | TypeAliasTemplateDecl *OldDecl = nullptr; | ||||
12846 | TemplateParameterList *OldTemplateParams = nullptr; | ||||
12847 | |||||
12848 | if (TemplateParamLists.size() != 1) { | ||||
12849 | Diag(UsingLoc, diag::err_alias_template_extra_headers) | ||||
12850 | << SourceRange(TemplateParamLists[1]->getTemplateLoc(), | ||||
12851 | TemplateParamLists[TemplateParamLists.size()-1]->getRAngleLoc()); | ||||
12852 | } | ||||
12853 | TemplateParameterList *TemplateParams = TemplateParamLists[0]; | ||||
12854 | |||||
12855 | // Check that we can declare a template here. | ||||
12856 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||
12857 | return nullptr; | ||||
12858 | |||||
12859 | // Only consider previous declarations in the same scope. | ||||
12860 | FilterLookupForScope(Previous, CurContext, S, /*ConsiderLinkage*/false, | ||||
12861 | /*ExplicitInstantiationOrSpecialization*/false); | ||||
12862 | if (!Previous.empty()) { | ||||
12863 | Redeclaration = true; | ||||
12864 | |||||
12865 | OldDecl = Previous.getAsSingle<TypeAliasTemplateDecl>(); | ||||
12866 | if (!OldDecl && !Invalid) { | ||||
12867 | Diag(UsingLoc, diag::err_redefinition_different_kind) | ||||
12868 | << Name.Identifier; | ||||
12869 | |||||
12870 | NamedDecl *OldD = Previous.getRepresentativeDecl(); | ||||
12871 | if (OldD->getLocation().isValid()) | ||||
12872 | Diag(OldD->getLocation(), diag::note_previous_definition); | ||||
12873 | |||||
12874 | Invalid = true; | ||||
12875 | } | ||||
12876 | |||||
12877 | if (!Invalid && OldDecl && !OldDecl->isInvalidDecl()) { | ||||
12878 | if (TemplateParameterListsAreEqual(TemplateParams, | ||||
12879 | OldDecl->getTemplateParameters(), | ||||
12880 | /*Complain=*/true, | ||||
12881 | TPL_TemplateMatch)) | ||||
12882 | OldTemplateParams = | ||||
12883 | OldDecl->getMostRecentDecl()->getTemplateParameters(); | ||||
12884 | else | ||||
12885 | Invalid = true; | ||||
12886 | |||||
12887 | TypeAliasDecl *OldTD = OldDecl->getTemplatedDecl(); | ||||
12888 | if (!Invalid && | ||||
12889 | !Context.hasSameType(OldTD->getUnderlyingType(), | ||||
12890 | NewTD->getUnderlyingType())) { | ||||
12891 | // FIXME: The C++0x standard does not clearly say this is ill-formed, | ||||
12892 | // but we can't reasonably accept it. | ||||
12893 | Diag(NewTD->getLocation(), diag::err_redefinition_different_typedef) | ||||
12894 | << 2 << NewTD->getUnderlyingType() << OldTD->getUnderlyingType(); | ||||
12895 | if (OldTD->getLocation().isValid()) | ||||
12896 | Diag(OldTD->getLocation(), diag::note_previous_definition); | ||||
12897 | Invalid = true; | ||||
12898 | } | ||||
12899 | } | ||||
12900 | } | ||||
12901 | |||||
12902 | // Merge any previous default template arguments into our parameters, | ||||
12903 | // and check the parameter list. | ||||
12904 | if (CheckTemplateParameterList(TemplateParams, OldTemplateParams, | ||||
12905 | TPC_TypeAliasTemplate)) | ||||
12906 | return nullptr; | ||||
12907 | |||||
12908 | TypeAliasTemplateDecl *NewDecl = | ||||
12909 | TypeAliasTemplateDecl::Create(Context, CurContext, UsingLoc, | ||||
12910 | Name.Identifier, TemplateParams, | ||||
12911 | NewTD); | ||||
12912 | NewTD->setDescribedAliasTemplate(NewDecl); | ||||
12913 | |||||
12914 | NewDecl->setAccess(AS); | ||||
12915 | |||||
12916 | if (Invalid) | ||||
12917 | NewDecl->setInvalidDecl(); | ||||
12918 | else if (OldDecl) { | ||||
12919 | NewDecl->setPreviousDecl(OldDecl); | ||||
12920 | CheckRedeclarationModuleOwnership(NewDecl, OldDecl); | ||||
12921 | } | ||||
12922 | |||||
12923 | NewND = NewDecl; | ||||
12924 | } else { | ||||
12925 | if (auto *TD = dyn_cast_or_null<TagDecl>(DeclFromDeclSpec)) { | ||||
12926 | setTagNameForLinkagePurposes(TD, NewTD); | ||||
12927 | handleTagNumbering(TD, S); | ||||
12928 | } | ||||
12929 | ActOnTypedefNameDecl(S, CurContext, NewTD, Previous, Redeclaration); | ||||
12930 | NewND = NewTD; | ||||
12931 | } | ||||
12932 | |||||
12933 | PushOnScopeChains(NewND, S); | ||||
12934 | ActOnDocumentableDecl(NewND); | ||||
12935 | return NewND; | ||||
12936 | } | ||||
12937 | |||||
12938 | Decl *Sema::ActOnNamespaceAliasDef(Scope *S, SourceLocation NamespaceLoc, | ||||
12939 | SourceLocation AliasLoc, | ||||
12940 | IdentifierInfo *Alias, CXXScopeSpec &SS, | ||||
12941 | SourceLocation IdentLoc, | ||||
12942 | IdentifierInfo *Ident) { | ||||
12943 | |||||
12944 | // Lookup the namespace name. | ||||
12945 | LookupResult R(*this, Ident, IdentLoc, LookupNamespaceName); | ||||
12946 | LookupParsedName(R, S, &SS); | ||||
12947 | |||||
12948 | if (R.isAmbiguous()) | ||||
12949 | return nullptr; | ||||
12950 | |||||
12951 | if (R.empty()) { | ||||
12952 | if (!TryNamespaceTypoCorrection(*this, R, S, SS, IdentLoc, Ident)) { | ||||
12953 | Diag(IdentLoc, diag::err_expected_namespace_name) << SS.getRange(); | ||||
12954 | return nullptr; | ||||
12955 | } | ||||
12956 | } | ||||
12957 | assert(!R.isAmbiguous() && !R.empty())(static_cast <bool> (!R.isAmbiguous() && !R.empty ()) ? void (0) : __assert_fail ("!R.isAmbiguous() && !R.empty()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 12957, __extension__ __PRETTY_FUNCTION__)); | ||||
12958 | NamedDecl *ND = R.getRepresentativeDecl(); | ||||
12959 | |||||
12960 | // Check if we have a previous declaration with the same name. | ||||
12961 | LookupResult PrevR(*this, Alias, AliasLoc, LookupOrdinaryName, | ||||
12962 | ForVisibleRedeclaration); | ||||
12963 | LookupName(PrevR, S); | ||||
12964 | |||||
12965 | // Check we're not shadowing a template parameter. | ||||
12966 | if (PrevR.isSingleResult() && PrevR.getFoundDecl()->isTemplateParameter()) { | ||||
12967 | DiagnoseTemplateParameterShadow(AliasLoc, PrevR.getFoundDecl()); | ||||
12968 | PrevR.clear(); | ||||
12969 | } | ||||
12970 | |||||
12971 | // Filter out any other lookup result from an enclosing scope. | ||||
12972 | FilterLookupForScope(PrevR, CurContext, S, /*ConsiderLinkage*/false, | ||||
12973 | /*AllowInlineNamespace*/false); | ||||
12974 | |||||
12975 | // Find the previous declaration and check that we can redeclare it. | ||||
12976 | NamespaceAliasDecl *Prev = nullptr; | ||||
12977 | if (PrevR.isSingleResult()) { | ||||
12978 | NamedDecl *PrevDecl = PrevR.getRepresentativeDecl(); | ||||
12979 | if (NamespaceAliasDecl *AD = dyn_cast<NamespaceAliasDecl>(PrevDecl)) { | ||||
12980 | // We already have an alias with the same name that points to the same | ||||
12981 | // namespace; check that it matches. | ||||
12982 | if (AD->getNamespace()->Equals(getNamespaceDecl(ND))) { | ||||
12983 | Prev = AD; | ||||
12984 | } else if (isVisible(PrevDecl)) { | ||||
12985 | Diag(AliasLoc, diag::err_redefinition_different_namespace_alias) | ||||
12986 | << Alias; | ||||
12987 | Diag(AD->getLocation(), diag::note_previous_namespace_alias) | ||||
12988 | << AD->getNamespace(); | ||||
12989 | return nullptr; | ||||
12990 | } | ||||
12991 | } else if (isVisible(PrevDecl)) { | ||||
12992 | unsigned DiagID = isa<NamespaceDecl>(PrevDecl->getUnderlyingDecl()) | ||||
12993 | ? diag::err_redefinition | ||||
12994 | : diag::err_redefinition_different_kind; | ||||
12995 | Diag(AliasLoc, DiagID) << Alias; | ||||
12996 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||
12997 | return nullptr; | ||||
12998 | } | ||||
12999 | } | ||||
13000 | |||||
13001 | // The use of a nested name specifier may trigger deprecation warnings. | ||||
13002 | DiagnoseUseOfDecl(ND, IdentLoc); | ||||
13003 | |||||
13004 | NamespaceAliasDecl *AliasDecl = | ||||
13005 | NamespaceAliasDecl::Create(Context, CurContext, NamespaceLoc, AliasLoc, | ||||
13006 | Alias, SS.getWithLocInContext(Context), | ||||
13007 | IdentLoc, ND); | ||||
13008 | if (Prev) | ||||
13009 | AliasDecl->setPreviousDecl(Prev); | ||||
13010 | |||||
13011 | PushOnScopeChains(AliasDecl, S); | ||||
13012 | return AliasDecl; | ||||
13013 | } | ||||
13014 | |||||
13015 | namespace { | ||||
13016 | struct SpecialMemberExceptionSpecInfo | ||||
13017 | : SpecialMemberVisitor<SpecialMemberExceptionSpecInfo> { | ||||
13018 | SourceLocation Loc; | ||||
13019 | Sema::ImplicitExceptionSpecification ExceptSpec; | ||||
13020 | |||||
13021 | SpecialMemberExceptionSpecInfo(Sema &S, CXXMethodDecl *MD, | ||||
13022 | Sema::CXXSpecialMember CSM, | ||||
13023 | Sema::InheritedConstructorInfo *ICI, | ||||
13024 | SourceLocation Loc) | ||||
13025 | : SpecialMemberVisitor(S, MD, CSM, ICI), Loc(Loc), ExceptSpec(S) {} | ||||
13026 | |||||
13027 | bool visitBase(CXXBaseSpecifier *Base); | ||||
13028 | bool visitField(FieldDecl *FD); | ||||
13029 | |||||
13030 | void visitClassSubobject(CXXRecordDecl *Class, Subobject Subobj, | ||||
13031 | unsigned Quals); | ||||
13032 | |||||
13033 | void visitSubobjectCall(Subobject Subobj, | ||||
13034 | Sema::SpecialMemberOverloadResult SMOR); | ||||
13035 | }; | ||||
13036 | } | ||||
13037 | |||||
13038 | bool SpecialMemberExceptionSpecInfo::visitBase(CXXBaseSpecifier *Base) { | ||||
13039 | auto *RT = Base->getType()->getAs<RecordType>(); | ||||
13040 | if (!RT) | ||||
13041 | return false; | ||||
13042 | |||||
13043 | auto *BaseClass = cast<CXXRecordDecl>(RT->getDecl()); | ||||
13044 | Sema::SpecialMemberOverloadResult SMOR = lookupInheritedCtor(BaseClass); | ||||
13045 | if (auto *BaseCtor = SMOR.getMethod()) { | ||||
13046 | visitSubobjectCall(Base, BaseCtor); | ||||
13047 | return false; | ||||
13048 | } | ||||
13049 | |||||
13050 | visitClassSubobject(BaseClass, Base, 0); | ||||
13051 | return false; | ||||
13052 | } | ||||
13053 | |||||
13054 | bool SpecialMemberExceptionSpecInfo::visitField(FieldDecl *FD) { | ||||
13055 | if (CSM == Sema::CXXDefaultConstructor && FD->hasInClassInitializer()) { | ||||
13056 | Expr *E = FD->getInClassInitializer(); | ||||
13057 | if (!E) | ||||
13058 | // FIXME: It's a little wasteful to build and throw away a | ||||
13059 | // CXXDefaultInitExpr here. | ||||
13060 | // FIXME: We should have a single context note pointing at Loc, and | ||||
13061 | // this location should be MD->getLocation() instead, since that's | ||||
13062 | // the location where we actually use the default init expression. | ||||
13063 | E = S.BuildCXXDefaultInitExpr(Loc, FD).get(); | ||||
13064 | if (E) | ||||
13065 | ExceptSpec.CalledExpr(E); | ||||
13066 | } else if (auto *RT = S.Context.getBaseElementType(FD->getType()) | ||||
13067 | ->getAs<RecordType>()) { | ||||
13068 | visitClassSubobject(cast<CXXRecordDecl>(RT->getDecl()), FD, | ||||
13069 | FD->getType().getCVRQualifiers()); | ||||
13070 | } | ||||
13071 | return false; | ||||
13072 | } | ||||
13073 | |||||
13074 | void SpecialMemberExceptionSpecInfo::visitClassSubobject(CXXRecordDecl *Class, | ||||
13075 | Subobject Subobj, | ||||
13076 | unsigned Quals) { | ||||
13077 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||
13078 | bool IsMutable = Field && Field->isMutable(); | ||||
13079 | visitSubobjectCall(Subobj, lookupIn(Class, Quals, IsMutable)); | ||||
13080 | } | ||||
13081 | |||||
13082 | void SpecialMemberExceptionSpecInfo::visitSubobjectCall( | ||||
13083 | Subobject Subobj, Sema::SpecialMemberOverloadResult SMOR) { | ||||
13084 | // Note, if lookup fails, it doesn't matter what exception specification we | ||||
13085 | // choose because the special member will be deleted. | ||||
13086 | if (CXXMethodDecl *MD = SMOR.getMethod()) | ||||
13087 | ExceptSpec.CalledDecl(getSubobjectLoc(Subobj), MD); | ||||
13088 | } | ||||
13089 | |||||
13090 | bool Sema::tryResolveExplicitSpecifier(ExplicitSpecifier &ExplicitSpec) { | ||||
13091 | llvm::APSInt Result; | ||||
13092 | ExprResult Converted = CheckConvertedConstantExpression( | ||||
13093 | ExplicitSpec.getExpr(), Context.BoolTy, Result, CCEK_ExplicitBool); | ||||
13094 | ExplicitSpec.setExpr(Converted.get()); | ||||
13095 | if (Converted.isUsable() && !Converted.get()->isValueDependent()) { | ||||
13096 | ExplicitSpec.setKind(Result.getBoolValue() | ||||
13097 | ? ExplicitSpecKind::ResolvedTrue | ||||
13098 | : ExplicitSpecKind::ResolvedFalse); | ||||
13099 | return true; | ||||
13100 | } | ||||
13101 | ExplicitSpec.setKind(ExplicitSpecKind::Unresolved); | ||||
13102 | return false; | ||||
13103 | } | ||||
13104 | |||||
13105 | ExplicitSpecifier Sema::ActOnExplicitBoolSpecifier(Expr *ExplicitExpr) { | ||||
13106 | ExplicitSpecifier ES(ExplicitExpr, ExplicitSpecKind::Unresolved); | ||||
13107 | if (!ExplicitExpr->isTypeDependent()) | ||||
13108 | tryResolveExplicitSpecifier(ES); | ||||
13109 | return ES; | ||||
13110 | } | ||||
13111 | |||||
13112 | static Sema::ImplicitExceptionSpecification | ||||
13113 | ComputeDefaultedSpecialMemberExceptionSpec( | ||||
13114 | Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||
13115 | Sema::InheritedConstructorInfo *ICI) { | ||||
13116 | ComputingExceptionSpec CES(S, MD, Loc); | ||||
13117 | |||||
13118 | CXXRecordDecl *ClassDecl = MD->getParent(); | ||||
13119 | |||||
13120 | // C++ [except.spec]p14: | ||||
13121 | // An implicitly declared special member function (Clause 12) shall have an | ||||
13122 | // exception-specification. [...] | ||||
13123 | SpecialMemberExceptionSpecInfo Info(S, MD, CSM, ICI, MD->getLocation()); | ||||
13124 | if (ClassDecl->isInvalidDecl()) | ||||
13125 | return Info.ExceptSpec; | ||||
13126 | |||||
13127 | // FIXME: If this diagnostic fires, we're probably missing a check for | ||||
13128 | // attempting to resolve an exception specification before it's known | ||||
13129 | // at a higher level. | ||||
13130 | if (S.RequireCompleteType(MD->getLocation(), | ||||
13131 | S.Context.getRecordType(ClassDecl), | ||||
13132 | diag::err_exception_spec_incomplete_type)) | ||||
13133 | return Info.ExceptSpec; | ||||
13134 | |||||
13135 | // C++1z [except.spec]p7: | ||||
13136 | // [Look for exceptions thrown by] a constructor selected [...] to | ||||
13137 | // initialize a potentially constructed subobject, | ||||
13138 | // C++1z [except.spec]p8: | ||||
13139 | // The exception specification for an implicitly-declared destructor, or a | ||||
13140 | // destructor without a noexcept-specifier, is potentially-throwing if and | ||||
13141 | // only if any of the destructors for any of its potentially constructed | ||||
13142 | // subojects is potentially throwing. | ||||
13143 | // FIXME: We respect the first rule but ignore the "potentially constructed" | ||||
13144 | // in the second rule to resolve a core issue (no number yet) that would have | ||||
13145 | // us reject: | ||||
13146 | // struct A { virtual void f() = 0; virtual ~A() noexcept(false) = 0; }; | ||||
13147 | // struct B : A {}; | ||||
13148 | // struct C : B { void f(); }; | ||||
13149 | // ... due to giving B::~B() a non-throwing exception specification. | ||||
13150 | Info.visit(Info.IsConstructor ? Info.VisitPotentiallyConstructedBases | ||||
13151 | : Info.VisitAllBases); | ||||
13152 | |||||
13153 | return Info.ExceptSpec; | ||||
13154 | } | ||||
13155 | |||||
13156 | namespace { | ||||
13157 | /// RAII object to register a special member as being currently declared. | ||||
13158 | struct DeclaringSpecialMember { | ||||
13159 | Sema &S; | ||||
13160 | Sema::SpecialMemberDecl D; | ||||
13161 | Sema::ContextRAII SavedContext; | ||||
13162 | bool WasAlreadyBeingDeclared; | ||||
13163 | |||||
13164 | DeclaringSpecialMember(Sema &S, CXXRecordDecl *RD, Sema::CXXSpecialMember CSM) | ||||
13165 | : S(S), D(RD, CSM), SavedContext(S, RD) { | ||||
13166 | WasAlreadyBeingDeclared = !S.SpecialMembersBeingDeclared.insert(D).second; | ||||
13167 | if (WasAlreadyBeingDeclared) | ||||
13168 | // This almost never happens, but if it does, ensure that our cache | ||||
13169 | // doesn't contain a stale result. | ||||
13170 | S.SpecialMemberCache.clear(); | ||||
13171 | else { | ||||
13172 | // Register a note to be produced if we encounter an error while | ||||
13173 | // declaring the special member. | ||||
13174 | Sema::CodeSynthesisContext Ctx; | ||||
13175 | Ctx.Kind = Sema::CodeSynthesisContext::DeclaringSpecialMember; | ||||
13176 | // FIXME: We don't have a location to use here. Using the class's | ||||
13177 | // location maintains the fiction that we declare all special members | ||||
13178 | // with the class, but (1) it's not clear that lying about that helps our | ||||
13179 | // users understand what's going on, and (2) there may be outer contexts | ||||
13180 | // on the stack (some of which are relevant) and printing them exposes | ||||
13181 | // our lies. | ||||
13182 | Ctx.PointOfInstantiation = RD->getLocation(); | ||||
13183 | Ctx.Entity = RD; | ||||
13184 | Ctx.SpecialMember = CSM; | ||||
13185 | S.pushCodeSynthesisContext(Ctx); | ||||
13186 | } | ||||
13187 | } | ||||
13188 | ~DeclaringSpecialMember() { | ||||
13189 | if (!WasAlreadyBeingDeclared) { | ||||
13190 | S.SpecialMembersBeingDeclared.erase(D); | ||||
13191 | S.popCodeSynthesisContext(); | ||||
13192 | } | ||||
13193 | } | ||||
13194 | |||||
13195 | /// Are we already trying to declare this special member? | ||||
13196 | bool isAlreadyBeingDeclared() const { | ||||
13197 | return WasAlreadyBeingDeclared; | ||||
13198 | } | ||||
13199 | }; | ||||
13200 | } | ||||
13201 | |||||
13202 | void Sema::CheckImplicitSpecialMemberDeclaration(Scope *S, FunctionDecl *FD) { | ||||
13203 | // Look up any existing declarations, but don't trigger declaration of all | ||||
13204 | // implicit special members with this name. | ||||
13205 | DeclarationName Name = FD->getDeclName(); | ||||
13206 | LookupResult R(*this, Name, SourceLocation(), LookupOrdinaryName, | ||||
13207 | ForExternalRedeclaration); | ||||
13208 | for (auto *D : FD->getParent()->lookup(Name)) | ||||
13209 | if (auto *Acceptable = R.getAcceptableDecl(D)) | ||||
13210 | R.addDecl(Acceptable); | ||||
13211 | R.resolveKind(); | ||||
13212 | R.suppressDiagnostics(); | ||||
13213 | |||||
13214 | CheckFunctionDeclaration(S, FD, R, /*IsMemberSpecialization*/false); | ||||
13215 | } | ||||
13216 | |||||
13217 | void Sema::setupImplicitSpecialMemberType(CXXMethodDecl *SpecialMem, | ||||
13218 | QualType ResultTy, | ||||
13219 | ArrayRef<QualType> Args) { | ||||
13220 | // Build an exception specification pointing back at this constructor. | ||||
13221 | FunctionProtoType::ExtProtoInfo EPI = getImplicitMethodEPI(*this, SpecialMem); | ||||
13222 | |||||
13223 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||
13224 | if (AS != LangAS::Default) { | ||||
13225 | EPI.TypeQuals.addAddressSpace(AS); | ||||
13226 | } | ||||
13227 | |||||
13228 | auto QT = Context.getFunctionType(ResultTy, Args, EPI); | ||||
13229 | SpecialMem->setType(QT); | ||||
13230 | |||||
13231 | // During template instantiation of implicit special member functions we need | ||||
13232 | // a reliable TypeSourceInfo for the function prototype in order to allow | ||||
13233 | // functions to be substituted. | ||||
13234 | if (inTemplateInstantiation() && | ||||
13235 | cast<CXXRecordDecl>(SpecialMem->getParent())->isLambda()) { | ||||
13236 | TypeSourceInfo *TSI = | ||||
13237 | Context.getTrivialTypeSourceInfo(SpecialMem->getType()); | ||||
13238 | SpecialMem->setTypeSourceInfo(TSI); | ||||
13239 | } | ||||
13240 | } | ||||
13241 | |||||
13242 | CXXConstructorDecl *Sema::DeclareImplicitDefaultConstructor( | ||||
13243 | CXXRecordDecl *ClassDecl) { | ||||
13244 | // C++ [class.ctor]p5: | ||||
13245 | // A default constructor for a class X is a constructor of class X | ||||
13246 | // that can be called without an argument. If there is no | ||||
13247 | // user-declared constructor for class X, a default constructor is | ||||
13248 | // implicitly declared. An implicitly-declared default constructor | ||||
13249 | // is an inline public member of its class. | ||||
13250 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13251, __extension__ __PRETTY_FUNCTION__)) | ||||
13251 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13251, __extension__ __PRETTY_FUNCTION__)); | ||||
13252 | |||||
13253 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXDefaultConstructor); | ||||
13254 | if (DSM.isAlreadyBeingDeclared()) | ||||
13255 | return nullptr; | ||||
13256 | |||||
13257 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||
13258 | CXXDefaultConstructor, | ||||
13259 | false); | ||||
13260 | |||||
13261 | // Create the actual constructor declaration. | ||||
13262 | CanQualType ClassType | ||||
13263 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||
13264 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||
13265 | DeclarationName Name | ||||
13266 | = Context.DeclarationNames.getCXXConstructorName(ClassType); | ||||
13267 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||
13268 | CXXConstructorDecl *DefaultCon = CXXConstructorDecl::Create( | ||||
13269 | Context, ClassDecl, ClassLoc, NameInfo, /*Type*/ QualType(), | ||||
13270 | /*TInfo=*/nullptr, ExplicitSpecifier(), | ||||
13271 | getCurFPFeatures().isFPConstrained(), | ||||
13272 | /*isInline=*/true, /*isImplicitlyDeclared=*/true, | ||||
13273 | Constexpr ? ConstexprSpecKind::Constexpr | ||||
13274 | : ConstexprSpecKind::Unspecified); | ||||
13275 | DefaultCon->setAccess(AS_public); | ||||
13276 | DefaultCon->setDefaulted(); | ||||
13277 | |||||
13278 | if (getLangOpts().CUDA) { | ||||
13279 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXDefaultConstructor, | ||||
13280 | DefaultCon, | ||||
13281 | /* ConstRHS */ false, | ||||
13282 | /* Diagnose */ false); | ||||
13283 | } | ||||
13284 | |||||
13285 | setupImplicitSpecialMemberType(DefaultCon, Context.VoidTy, None); | ||||
13286 | |||||
13287 | // We don't need to use SpecialMemberIsTrivial here; triviality for default | ||||
13288 | // constructors is easy to compute. | ||||
13289 | DefaultCon->setTrivial(ClassDecl->hasTrivialDefaultConstructor()); | ||||
13290 | |||||
13291 | // Note that we have declared this constructor. | ||||
13292 | ++getASTContext().NumImplicitDefaultConstructorsDeclared; | ||||
13293 | |||||
13294 | Scope *S = getScopeForContext(ClassDecl); | ||||
13295 | CheckImplicitSpecialMemberDeclaration(S, DefaultCon); | ||||
13296 | |||||
13297 | if (ShouldDeleteSpecialMember(DefaultCon, CXXDefaultConstructor)) | ||||
13298 | SetDeclDeleted(DefaultCon, ClassLoc); | ||||
13299 | |||||
13300 | if (S) | ||||
13301 | PushOnScopeChains(DefaultCon, S, false); | ||||
13302 | ClassDecl->addDecl(DefaultCon); | ||||
13303 | |||||
13304 | return DefaultCon; | ||||
13305 | } | ||||
13306 | |||||
13307 | void Sema::DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, | ||||
13308 | CXXConstructorDecl *Constructor) { | ||||
13309 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13312, __extension__ __PRETTY_FUNCTION__)) | ||||
13310 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13312, __extension__ __PRETTY_FUNCTION__)) | ||||
13311 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13312, __extension__ __PRETTY_FUNCTION__)) | ||||
13312 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13312, __extension__ __PRETTY_FUNCTION__)); | ||||
13313 | if (Constructor->willHaveBody() || Constructor->isInvalidDecl()) | ||||
13314 | return; | ||||
13315 | |||||
13316 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||
13317 | assert(ClassDecl && "DefineImplicitDefaultConstructor - invalid constructor")(static_cast <bool> (ClassDecl && "DefineImplicitDefaultConstructor - invalid constructor" ) ? void (0) : __assert_fail ("ClassDecl && \"DefineImplicitDefaultConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13317, __extension__ __PRETTY_FUNCTION__)); | ||||
13318 | |||||
13319 | SynthesizedFunctionScope Scope(*this, Constructor); | ||||
13320 | |||||
13321 | // The exception specification is needed because we are defining the | ||||
13322 | // function. | ||||
13323 | ResolveExceptionSpec(CurrentLocation, | ||||
13324 | Constructor->getType()->castAs<FunctionProtoType>()); | ||||
13325 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||
13326 | |||||
13327 | // Add a context note for diagnostics produced after this point. | ||||
13328 | Scope.addContextNote(CurrentLocation); | ||||
13329 | |||||
13330 | if (SetCtorInitializers(Constructor, /*AnyErrors=*/false)) { | ||||
13331 | Constructor->setInvalidDecl(); | ||||
13332 | return; | ||||
13333 | } | ||||
13334 | |||||
13335 | SourceLocation Loc = Constructor->getEndLoc().isValid() | ||||
13336 | ? Constructor->getEndLoc() | ||||
13337 | : Constructor->getLocation(); | ||||
13338 | Constructor->setBody(new (Context) CompoundStmt(Loc)); | ||||
13339 | Constructor->markUsed(Context); | ||||
13340 | |||||
13341 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
13342 | L->CompletedImplicitDefinition(Constructor); | ||||
13343 | } | ||||
13344 | |||||
13345 | DiagnoseUninitializedFields(*this, Constructor); | ||||
13346 | } | ||||
13347 | |||||
13348 | void Sema::ActOnFinishDelayedMemberInitializers(Decl *D) { | ||||
13349 | // Perform any delayed checks on exception specifications. | ||||
13350 | CheckDelayedMemberExceptionSpecs(); | ||||
13351 | } | ||||
13352 | |||||
13353 | /// Find or create the fake constructor we synthesize to model constructing an | ||||
13354 | /// object of a derived class via a constructor of a base class. | ||||
13355 | CXXConstructorDecl * | ||||
13356 | Sema::findInheritingConstructor(SourceLocation Loc, | ||||
13357 | CXXConstructorDecl *BaseCtor, | ||||
13358 | ConstructorUsingShadowDecl *Shadow) { | ||||
13359 | CXXRecordDecl *Derived = Shadow->getParent(); | ||||
13360 | SourceLocation UsingLoc = Shadow->getLocation(); | ||||
13361 | |||||
13362 | // FIXME: Add a new kind of DeclarationName for an inherited constructor. | ||||
13363 | // For now we use the name of the base class constructor as a member of the | ||||
13364 | // derived class to indicate a (fake) inherited constructor name. | ||||
13365 | DeclarationName Name = BaseCtor->getDeclName(); | ||||
13366 | |||||
13367 | // Check to see if we already have a fake constructor for this inherited | ||||
13368 | // constructor call. | ||||
13369 | for (NamedDecl *Ctor : Derived->lookup(Name)) | ||||
13370 | if (declaresSameEntity(cast<CXXConstructorDecl>(Ctor) | ||||
13371 | ->getInheritedConstructor() | ||||
13372 | .getConstructor(), | ||||
13373 | BaseCtor)) | ||||
13374 | return cast<CXXConstructorDecl>(Ctor); | ||||
13375 | |||||
13376 | DeclarationNameInfo NameInfo(Name, UsingLoc); | ||||
13377 | TypeSourceInfo *TInfo = | ||||
13378 | Context.getTrivialTypeSourceInfo(BaseCtor->getType(), UsingLoc); | ||||
13379 | FunctionProtoTypeLoc ProtoLoc = | ||||
13380 | TInfo->getTypeLoc().IgnoreParens().castAs<FunctionProtoTypeLoc>(); | ||||
13381 | |||||
13382 | // Check the inherited constructor is valid and find the list of base classes | ||||
13383 | // from which it was inherited. | ||||
13384 | InheritedConstructorInfo ICI(*this, Loc, Shadow); | ||||
13385 | |||||
13386 | bool Constexpr = | ||||
13387 | BaseCtor->isConstexpr() && | ||||
13388 | defaultedSpecialMemberIsConstexpr(*this, Derived, CXXDefaultConstructor, | ||||
13389 | false, BaseCtor, &ICI); | ||||
13390 | |||||
13391 | CXXConstructorDecl *DerivedCtor = CXXConstructorDecl::Create( | ||||
13392 | Context, Derived, UsingLoc, NameInfo, TInfo->getType(), TInfo, | ||||
13393 | BaseCtor->getExplicitSpecifier(), getCurFPFeatures().isFPConstrained(), | ||||
13394 | /*isInline=*/true, | ||||
13395 | /*isImplicitlyDeclared=*/true, | ||||
13396 | Constexpr ? BaseCtor->getConstexprKind() : ConstexprSpecKind::Unspecified, | ||||
13397 | InheritedConstructor(Shadow, BaseCtor), | ||||
13398 | BaseCtor->getTrailingRequiresClause()); | ||||
13399 | if (Shadow->isInvalidDecl()) | ||||
13400 | DerivedCtor->setInvalidDecl(); | ||||
13401 | |||||
13402 | // Build an unevaluated exception specification for this fake constructor. | ||||
13403 | const FunctionProtoType *FPT = TInfo->getType()->castAs<FunctionProtoType>(); | ||||
13404 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||
13405 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||
13406 | EPI.ExceptionSpec.SourceDecl = DerivedCtor; | ||||
13407 | DerivedCtor->setType(Context.getFunctionType(FPT->getReturnType(), | ||||
13408 | FPT->getParamTypes(), EPI)); | ||||
13409 | |||||
13410 | // Build the parameter declarations. | ||||
13411 | SmallVector<ParmVarDecl *, 16> ParamDecls; | ||||
13412 | for (unsigned I = 0, N = FPT->getNumParams(); I != N; ++I) { | ||||
13413 | TypeSourceInfo *TInfo = | ||||
13414 | Context.getTrivialTypeSourceInfo(FPT->getParamType(I), UsingLoc); | ||||
13415 | ParmVarDecl *PD = ParmVarDecl::Create( | ||||
13416 | Context, DerivedCtor, UsingLoc, UsingLoc, /*IdentifierInfo=*/nullptr, | ||||
13417 | FPT->getParamType(I), TInfo, SC_None, /*DefArg=*/nullptr); | ||||
13418 | PD->setScopeInfo(0, I); | ||||
13419 | PD->setImplicit(); | ||||
13420 | // Ensure attributes are propagated onto parameters (this matters for | ||||
13421 | // format, pass_object_size, ...). | ||||
13422 | mergeDeclAttributes(PD, BaseCtor->getParamDecl(I)); | ||||
13423 | ParamDecls.push_back(PD); | ||||
13424 | ProtoLoc.setParam(I, PD); | ||||
13425 | } | ||||
13426 | |||||
13427 | // Set up the new constructor. | ||||
13428 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13428, __extension__ __PRETTY_FUNCTION__)); | ||||
13429 | DerivedCtor->setAccess(BaseCtor->getAccess()); | ||||
13430 | DerivedCtor->setParams(ParamDecls); | ||||
13431 | Derived->addDecl(DerivedCtor); | ||||
13432 | |||||
13433 | if (ShouldDeleteSpecialMember(DerivedCtor, CXXDefaultConstructor, &ICI)) | ||||
13434 | SetDeclDeleted(DerivedCtor, UsingLoc); | ||||
13435 | |||||
13436 | return DerivedCtor; | ||||
13437 | } | ||||
13438 | |||||
13439 | void Sema::NoteDeletedInheritingConstructor(CXXConstructorDecl *Ctor) { | ||||
13440 | InheritedConstructorInfo ICI(*this, Ctor->getLocation(), | ||||
13441 | Ctor->getInheritedConstructor().getShadowDecl()); | ||||
13442 | ShouldDeleteSpecialMember(Ctor, CXXDefaultConstructor, &ICI, | ||||
13443 | /*Diagnose*/true); | ||||
13444 | } | ||||
13445 | |||||
13446 | void Sema::DefineInheritingConstructor(SourceLocation CurrentLocation, | ||||
13447 | CXXConstructorDecl *Constructor) { | ||||
13448 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||
13449 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13451, __extension__ __PRETTY_FUNCTION__)) | ||||
13450 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13451, __extension__ __PRETTY_FUNCTION__)) | ||||
13451 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13451, __extension__ __PRETTY_FUNCTION__)); | ||||
13452 | if (Constructor->willHaveBody() || Constructor->isInvalidDecl()) | ||||
13453 | return; | ||||
13454 | |||||
13455 | // Initializations are performed "as if by a defaulted default constructor", | ||||
13456 | // so enter the appropriate scope. | ||||
13457 | SynthesizedFunctionScope Scope(*this, Constructor); | ||||
13458 | |||||
13459 | // The exception specification is needed because we are defining the | ||||
13460 | // function. | ||||
13461 | ResolveExceptionSpec(CurrentLocation, | ||||
13462 | Constructor->getType()->castAs<FunctionProtoType>()); | ||||
13463 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||
13464 | |||||
13465 | // Add a context note for diagnostics produced after this point. | ||||
13466 | Scope.addContextNote(CurrentLocation); | ||||
13467 | |||||
13468 | ConstructorUsingShadowDecl *Shadow = | ||||
13469 | Constructor->getInheritedConstructor().getShadowDecl(); | ||||
13470 | CXXConstructorDecl *InheritedCtor = | ||||
13471 | Constructor->getInheritedConstructor().getConstructor(); | ||||
13472 | |||||
13473 | // [class.inhctor.init]p1: | ||||
13474 | // initialization proceeds as if a defaulted default constructor is used to | ||||
13475 | // initialize the D object and each base class subobject from which the | ||||
13476 | // constructor was inherited | ||||
13477 | |||||
13478 | InheritedConstructorInfo ICI(*this, CurrentLocation, Shadow); | ||||
13479 | CXXRecordDecl *RD = Shadow->getParent(); | ||||
13480 | SourceLocation InitLoc = Shadow->getLocation(); | ||||
13481 | |||||
13482 | // Build explicit initializers for all base classes from which the | ||||
13483 | // constructor was inherited. | ||||
13484 | SmallVector<CXXCtorInitializer*, 8> Inits; | ||||
13485 | for (bool VBase : {false, true}) { | ||||
13486 | for (CXXBaseSpecifier &B : VBase ? RD->vbases() : RD->bases()) { | ||||
13487 | if (B.isVirtual() != VBase) | ||||
13488 | continue; | ||||
13489 | |||||
13490 | auto *BaseRD = B.getType()->getAsCXXRecordDecl(); | ||||
13491 | if (!BaseRD) | ||||
13492 | continue; | ||||
13493 | |||||
13494 | auto BaseCtor = ICI.findConstructorForBase(BaseRD, InheritedCtor); | ||||
13495 | if (!BaseCtor.first) | ||||
13496 | continue; | ||||
13497 | |||||
13498 | MarkFunctionReferenced(CurrentLocation, BaseCtor.first); | ||||
13499 | ExprResult Init = new (Context) CXXInheritedCtorInitExpr( | ||||
13500 | InitLoc, B.getType(), BaseCtor.first, VBase, BaseCtor.second); | ||||
13501 | |||||
13502 | auto *TInfo = Context.getTrivialTypeSourceInfo(B.getType(), InitLoc); | ||||
13503 | Inits.push_back(new (Context) CXXCtorInitializer( | ||||
13504 | Context, TInfo, VBase, InitLoc, Init.get(), InitLoc, | ||||
13505 | SourceLocation())); | ||||
13506 | } | ||||
13507 | } | ||||
13508 | |||||
13509 | // We now proceed as if for a defaulted default constructor, with the relevant | ||||
13510 | // initializers replaced. | ||||
13511 | |||||
13512 | if (SetCtorInitializers(Constructor, /*AnyErrors*/false, Inits)) { | ||||
13513 | Constructor->setInvalidDecl(); | ||||
13514 | return; | ||||
13515 | } | ||||
13516 | |||||
13517 | Constructor->setBody(new (Context) CompoundStmt(InitLoc)); | ||||
13518 | Constructor->markUsed(Context); | ||||
13519 | |||||
13520 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
13521 | L->CompletedImplicitDefinition(Constructor); | ||||
13522 | } | ||||
13523 | |||||
13524 | DiagnoseUninitializedFields(*this, Constructor); | ||||
13525 | } | ||||
13526 | |||||
13527 | CXXDestructorDecl *Sema::DeclareImplicitDestructor(CXXRecordDecl *ClassDecl) { | ||||
13528 | // C++ [class.dtor]p2: | ||||
13529 | // If a class has no user-declared destructor, a destructor is | ||||
13530 | // declared implicitly. An implicitly-declared destructor is an | ||||
13531 | // inline public member of its class. | ||||
13532 | assert(ClassDecl->needsImplicitDestructor())(static_cast <bool> (ClassDecl->needsImplicitDestructor ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitDestructor()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13532, __extension__ __PRETTY_FUNCTION__)); | ||||
13533 | |||||
13534 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXDestructor); | ||||
13535 | if (DSM.isAlreadyBeingDeclared()) | ||||
13536 | return nullptr; | ||||
13537 | |||||
13538 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||
13539 | CXXDestructor, | ||||
13540 | false); | ||||
13541 | |||||
13542 | // Create the actual destructor declaration. | ||||
13543 | CanQualType ClassType | ||||
13544 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||
13545 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||
13546 | DeclarationName Name | ||||
13547 | = Context.DeclarationNames.getCXXDestructorName(ClassType); | ||||
13548 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||
13549 | CXXDestructorDecl *Destructor = CXXDestructorDecl::Create( | ||||
13550 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), nullptr, | ||||
13551 | getCurFPFeatures().isFPConstrained(), | ||||
13552 | /*isInline=*/true, | ||||
13553 | /*isImplicitlyDeclared=*/true, | ||||
13554 | Constexpr ? ConstexprSpecKind::Constexpr | ||||
13555 | : ConstexprSpecKind::Unspecified); | ||||
13556 | Destructor->setAccess(AS_public); | ||||
13557 | Destructor->setDefaulted(); | ||||
13558 | |||||
13559 | if (getLangOpts().CUDA) { | ||||
13560 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXDestructor, | ||||
13561 | Destructor, | ||||
13562 | /* ConstRHS */ false, | ||||
13563 | /* Diagnose */ false); | ||||
13564 | } | ||||
13565 | |||||
13566 | setupImplicitSpecialMemberType(Destructor, Context.VoidTy, None); | ||||
13567 | |||||
13568 | // We don't need to use SpecialMemberIsTrivial here; triviality for | ||||
13569 | // destructors is easy to compute. | ||||
13570 | Destructor->setTrivial(ClassDecl->hasTrivialDestructor()); | ||||
13571 | Destructor->setTrivialForCall(ClassDecl->hasAttr<TrivialABIAttr>() || | ||||
13572 | ClassDecl->hasTrivialDestructorForCall()); | ||||
13573 | |||||
13574 | // Note that we have declared this destructor. | ||||
13575 | ++getASTContext().NumImplicitDestructorsDeclared; | ||||
13576 | |||||
13577 | Scope *S = getScopeForContext(ClassDecl); | ||||
13578 | CheckImplicitSpecialMemberDeclaration(S, Destructor); | ||||
13579 | |||||
13580 | // We can't check whether an implicit destructor is deleted before we complete | ||||
13581 | // the definition of the class, because its validity depends on the alignment | ||||
13582 | // of the class. We'll check this from ActOnFields once the class is complete. | ||||
13583 | if (ClassDecl->isCompleteDefinition() && | ||||
13584 | ShouldDeleteSpecialMember(Destructor, CXXDestructor)) | ||||
13585 | SetDeclDeleted(Destructor, ClassLoc); | ||||
13586 | |||||
13587 | // Introduce this destructor into its scope. | ||||
13588 | if (S) | ||||
13589 | PushOnScopeChains(Destructor, S, false); | ||||
13590 | ClassDecl->addDecl(Destructor); | ||||
13591 | |||||
13592 | return Destructor; | ||||
13593 | } | ||||
13594 | |||||
13595 | void Sema::DefineImplicitDestructor(SourceLocation CurrentLocation, | ||||
13596 | CXXDestructorDecl *Destructor) { | ||||
13597 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13600, __extension__ __PRETTY_FUNCTION__)) | ||||
13598 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13600, __extension__ __PRETTY_FUNCTION__)) | ||||
13599 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13600, __extension__ __PRETTY_FUNCTION__)) | ||||
13600 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13600, __extension__ __PRETTY_FUNCTION__)); | ||||
13601 | if (Destructor->willHaveBody() || Destructor->isInvalidDecl()) | ||||
13602 | return; | ||||
13603 | |||||
13604 | CXXRecordDecl *ClassDecl = Destructor->getParent(); | ||||
13605 | assert(ClassDecl && "DefineImplicitDestructor - invalid destructor")(static_cast <bool> (ClassDecl && "DefineImplicitDestructor - invalid destructor" ) ? void (0) : __assert_fail ("ClassDecl && \"DefineImplicitDestructor - invalid destructor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13605, __extension__ __PRETTY_FUNCTION__)); | ||||
13606 | |||||
13607 | SynthesizedFunctionScope Scope(*this, Destructor); | ||||
13608 | |||||
13609 | // The exception specification is needed because we are defining the | ||||
13610 | // function. | ||||
13611 | ResolveExceptionSpec(CurrentLocation, | ||||
13612 | Destructor->getType()->castAs<FunctionProtoType>()); | ||||
13613 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||
13614 | |||||
13615 | // Add a context note for diagnostics produced after this point. | ||||
13616 | Scope.addContextNote(CurrentLocation); | ||||
13617 | |||||
13618 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), | ||||
13619 | Destructor->getParent()); | ||||
13620 | |||||
13621 | if (CheckDestructor(Destructor)) { | ||||
13622 | Destructor->setInvalidDecl(); | ||||
13623 | return; | ||||
13624 | } | ||||
13625 | |||||
13626 | SourceLocation Loc = Destructor->getEndLoc().isValid() | ||||
13627 | ? Destructor->getEndLoc() | ||||
13628 | : Destructor->getLocation(); | ||||
13629 | Destructor->setBody(new (Context) CompoundStmt(Loc)); | ||||
13630 | Destructor->markUsed(Context); | ||||
13631 | |||||
13632 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
13633 | L->CompletedImplicitDefinition(Destructor); | ||||
13634 | } | ||||
13635 | } | ||||
13636 | |||||
13637 | void Sema::CheckCompleteDestructorVariant(SourceLocation CurrentLocation, | ||||
13638 | CXXDestructorDecl *Destructor) { | ||||
13639 | if (Destructor->isInvalidDecl()) | ||||
13640 | return; | ||||
13641 | |||||
13642 | CXXRecordDecl *ClassDecl = Destructor->getParent(); | ||||
13643 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13644, __extension__ __PRETTY_FUNCTION__)) | ||||
13644 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13644, __extension__ __PRETTY_FUNCTION__)); | ||||
13645 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13646, __extension__ __PRETTY_FUNCTION__)) | ||||
13646 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13646, __extension__ __PRETTY_FUNCTION__)); | ||||
13647 | |||||
13648 | SynthesizedFunctionScope Scope(*this, Destructor); | ||||
13649 | |||||
13650 | // Add a context note for diagnostics produced after this point. | ||||
13651 | Scope.addContextNote(CurrentLocation); | ||||
13652 | |||||
13653 | MarkVirtualBaseDestructorsReferenced(Destructor->getLocation(), ClassDecl); | ||||
13654 | } | ||||
13655 | |||||
13656 | /// Perform any semantic analysis which needs to be delayed until all | ||||
13657 | /// pending class member declarations have been parsed. | ||||
13658 | void Sema::ActOnFinishCXXMemberDecls() { | ||||
13659 | // If the context is an invalid C++ class, just suppress these checks. | ||||
13660 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(CurContext)) { | ||||
13661 | if (Record->isInvalidDecl()) { | ||||
13662 | DelayedOverridingExceptionSpecChecks.clear(); | ||||
13663 | DelayedEquivalentExceptionSpecChecks.clear(); | ||||
13664 | return; | ||||
13665 | } | ||||
13666 | checkForMultipleExportedDefaultConstructors(*this, Record); | ||||
13667 | } | ||||
13668 | } | ||||
13669 | |||||
13670 | void Sema::ActOnFinishCXXNonNestedClass() { | ||||
13671 | referenceDLLExportedClassMethods(); | ||||
13672 | |||||
13673 | if (!DelayedDllExportMemberFunctions.empty()) { | ||||
13674 | SmallVector<CXXMethodDecl*, 4> WorkList; | ||||
13675 | std::swap(DelayedDllExportMemberFunctions, WorkList); | ||||
13676 | for (CXXMethodDecl *M : WorkList) { | ||||
13677 | DefineDefaultedFunction(*this, M, M->getLocation()); | ||||
13678 | |||||
13679 | // Pass the method to the consumer to get emitted. This is not necessary | ||||
13680 | // for explicit instantiation definitions, as they will get emitted | ||||
13681 | // anyway. | ||||
13682 | if (M->getParent()->getTemplateSpecializationKind() != | ||||
13683 | TSK_ExplicitInstantiationDefinition) | ||||
13684 | ActOnFinishInlineFunctionDef(M); | ||||
13685 | } | ||||
13686 | } | ||||
13687 | } | ||||
13688 | |||||
13689 | void Sema::referenceDLLExportedClassMethods() { | ||||
13690 | if (!DelayedDllExportClasses.empty()) { | ||||
13691 | // Calling ReferenceDllExportedMembers might cause the current function to | ||||
13692 | // be called again, so use a local copy of DelayedDllExportClasses. | ||||
13693 | SmallVector<CXXRecordDecl *, 4> WorkList; | ||||
13694 | std::swap(DelayedDllExportClasses, WorkList); | ||||
13695 | for (CXXRecordDecl *Class : WorkList) | ||||
13696 | ReferenceDllExportedMembers(*this, Class); | ||||
13697 | } | ||||
13698 | } | ||||
13699 | |||||
13700 | void Sema::AdjustDestructorExceptionSpec(CXXDestructorDecl *Destructor) { | ||||
13701 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13702, __extension__ __PRETTY_FUNCTION__)) | ||||
13702 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13702, __extension__ __PRETTY_FUNCTION__)); | ||||
13703 | |||||
13704 | if (Destructor->isDependentContext()) | ||||
13705 | return; | ||||
13706 | |||||
13707 | // C++11 [class.dtor]p3: | ||||
13708 | // A declaration of a destructor that does not have an exception- | ||||
13709 | // specification is implicitly considered to have the same exception- | ||||
13710 | // specification as an implicit declaration. | ||||
13711 | const auto *DtorType = Destructor->getType()->castAs<FunctionProtoType>(); | ||||
13712 | if (DtorType->hasExceptionSpec()) | ||||
13713 | return; | ||||
13714 | |||||
13715 | // Replace the destructor's type, building off the existing one. Fortunately, | ||||
13716 | // the only thing of interest in the destructor type is its extended info. | ||||
13717 | // The return and arguments are fixed. | ||||
13718 | FunctionProtoType::ExtProtoInfo EPI = DtorType->getExtProtoInfo(); | ||||
13719 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||
13720 | EPI.ExceptionSpec.SourceDecl = Destructor; | ||||
13721 | Destructor->setType(Context.getFunctionType(Context.VoidTy, None, EPI)); | ||||
13722 | |||||
13723 | // FIXME: If the destructor has a body that could throw, and the newly created | ||||
13724 | // spec doesn't allow exceptions, we should emit a warning, because this | ||||
13725 | // change in behavior can break conforming C++03 programs at runtime. | ||||
13726 | // However, we don't have a body or an exception specification yet, so it | ||||
13727 | // needs to be done somewhere else. | ||||
13728 | } | ||||
13729 | |||||
13730 | namespace { | ||||
13731 | /// An abstract base class for all helper classes used in building the | ||||
13732 | // copy/move operators. These classes serve as factory functions and help us | ||||
13733 | // avoid using the same Expr* in the AST twice. | ||||
13734 | class ExprBuilder { | ||||
13735 | ExprBuilder(const ExprBuilder&) = delete; | ||||
13736 | ExprBuilder &operator=(const ExprBuilder&) = delete; | ||||
13737 | |||||
13738 | protected: | ||||
13739 | static Expr *assertNotNull(Expr *E) { | ||||
13740 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13740, __extension__ __PRETTY_FUNCTION__)); | ||||
13741 | return E; | ||||
13742 | } | ||||
13743 | |||||
13744 | public: | ||||
13745 | ExprBuilder() {} | ||||
13746 | virtual ~ExprBuilder() {} | ||||
13747 | |||||
13748 | virtual Expr *build(Sema &S, SourceLocation Loc) const = 0; | ||||
13749 | }; | ||||
13750 | |||||
13751 | class RefBuilder: public ExprBuilder { | ||||
13752 | VarDecl *Var; | ||||
13753 | QualType VarType; | ||||
13754 | |||||
13755 | public: | ||||
13756 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||
13757 | return assertNotNull(S.BuildDeclRefExpr(Var, VarType, VK_LValue, Loc)); | ||||
13758 | } | ||||
13759 | |||||
13760 | RefBuilder(VarDecl *Var, QualType VarType) | ||||
13761 | : Var(Var), VarType(VarType) {} | ||||
13762 | }; | ||||
13763 | |||||
13764 | class ThisBuilder: public ExprBuilder { | ||||
13765 | public: | ||||
13766 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||
13767 | return assertNotNull(S.ActOnCXXThis(Loc).getAs<Expr>()); | ||||
13768 | } | ||||
13769 | }; | ||||
13770 | |||||
13771 | class CastBuilder: public ExprBuilder { | ||||
13772 | const ExprBuilder &Builder; | ||||
13773 | QualType Type; | ||||
13774 | ExprValueKind Kind; | ||||
13775 | const CXXCastPath &Path; | ||||
13776 | |||||
13777 | public: | ||||
13778 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||
13779 | return assertNotNull(S.ImpCastExprToType(Builder.build(S, Loc), Type, | ||||
13780 | CK_UncheckedDerivedToBase, Kind, | ||||
13781 | &Path).get()); | ||||
13782 | } | ||||
13783 | |||||
13784 | CastBuilder(const ExprBuilder &Builder, QualType Type, ExprValueKind Kind, | ||||
13785 | const CXXCastPath &Path) | ||||
13786 | : Builder(Builder), Type(Type), Kind(Kind), Path(Path) {} | ||||
13787 | }; | ||||
13788 | |||||
13789 | class DerefBuilder: public ExprBuilder { | ||||
13790 | const ExprBuilder &Builder; | ||||
13791 | |||||
13792 | public: | ||||
13793 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||
13794 | return assertNotNull( | ||||
13795 | S.CreateBuiltinUnaryOp(Loc, UO_Deref, Builder.build(S, Loc)).get()); | ||||
13796 | } | ||||
13797 | |||||
13798 | DerefBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||
13799 | }; | ||||
13800 | |||||
13801 | class MemberBuilder: public ExprBuilder { | ||||
13802 | const ExprBuilder &Builder; | ||||
13803 | QualType Type; | ||||
13804 | CXXScopeSpec SS; | ||||
13805 | bool IsArrow; | ||||
13806 | LookupResult &MemberLookup; | ||||
13807 | |||||
13808 | public: | ||||
13809 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||
13810 | return assertNotNull(S.BuildMemberReferenceExpr( | ||||
13811 | Builder.build(S, Loc), Type, Loc, IsArrow, SS, SourceLocation(), | ||||
13812 | nullptr, MemberLookup, nullptr, nullptr).get()); | ||||
13813 | } | ||||
13814 | |||||
13815 | MemberBuilder(const ExprBuilder &Builder, QualType Type, bool IsArrow, | ||||
13816 | LookupResult &MemberLookup) | ||||
13817 | : Builder(Builder), Type(Type), IsArrow(IsArrow), | ||||
13818 | MemberLookup(MemberLookup) {} | ||||
13819 | }; | ||||
13820 | |||||
13821 | class MoveCastBuilder: public ExprBuilder { | ||||
13822 | const ExprBuilder &Builder; | ||||
13823 | |||||
13824 | public: | ||||
13825 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||
13826 | return assertNotNull(CastForMoving(S, Builder.build(S, Loc))); | ||||
13827 | } | ||||
13828 | |||||
13829 | MoveCastBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||
13830 | }; | ||||
13831 | |||||
13832 | class LvalueConvBuilder: public ExprBuilder { | ||||
13833 | const ExprBuilder &Builder; | ||||
13834 | |||||
13835 | public: | ||||
13836 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||
13837 | return assertNotNull( | ||||
13838 | S.DefaultLvalueConversion(Builder.build(S, Loc)).get()); | ||||
13839 | } | ||||
13840 | |||||
13841 | LvalueConvBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||
13842 | }; | ||||
13843 | |||||
13844 | class SubscriptBuilder: public ExprBuilder { | ||||
13845 | const ExprBuilder &Base; | ||||
13846 | const ExprBuilder &Index; | ||||
13847 | |||||
13848 | public: | ||||
13849 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||
13850 | return assertNotNull(S.CreateBuiltinArraySubscriptExpr( | ||||
13851 | Base.build(S, Loc), Loc, Index.build(S, Loc), Loc).get()); | ||||
13852 | } | ||||
13853 | |||||
13854 | SubscriptBuilder(const ExprBuilder &Base, const ExprBuilder &Index) | ||||
13855 | : Base(Base), Index(Index) {} | ||||
13856 | }; | ||||
13857 | |||||
13858 | } // end anonymous namespace | ||||
13859 | |||||
13860 | /// When generating a defaulted copy or move assignment operator, if a field | ||||
13861 | /// should be copied with __builtin_memcpy rather than via explicit assignments, | ||||
13862 | /// do so. This optimization only applies for arrays of scalars, and for arrays | ||||
13863 | /// of class type where the selected copy/move-assignment operator is trivial. | ||||
13864 | static StmtResult | ||||
13865 | buildMemcpyForAssignmentOp(Sema &S, SourceLocation Loc, QualType T, | ||||
13866 | const ExprBuilder &ToB, const ExprBuilder &FromB) { | ||||
13867 | // Compute the size of the memory buffer to be copied. | ||||
13868 | QualType SizeType = S.Context.getSizeType(); | ||||
13869 | llvm::APInt Size(S.Context.getTypeSize(SizeType), | ||||
13870 | S.Context.getTypeSizeInChars(T).getQuantity()); | ||||
13871 | |||||
13872 | // Take the address of the field references for "from" and "to". We | ||||
13873 | // directly construct UnaryOperators here because semantic analysis | ||||
13874 | // does not permit us to take the address of an xvalue. | ||||
13875 | Expr *From = FromB.build(S, Loc); | ||||
13876 | From = UnaryOperator::Create( | ||||
13877 | S.Context, From, UO_AddrOf, S.Context.getPointerType(From->getType()), | ||||
13878 | VK_PRValue, OK_Ordinary, Loc, false, S.CurFPFeatureOverrides()); | ||||
13879 | Expr *To = ToB.build(S, Loc); | ||||
13880 | To = UnaryOperator::Create( | ||||
13881 | S.Context, To, UO_AddrOf, S.Context.getPointerType(To->getType()), | ||||
13882 | VK_PRValue, OK_Ordinary, Loc, false, S.CurFPFeatureOverrides()); | ||||
13883 | |||||
13884 | const Type *E = T->getBaseElementTypeUnsafe(); | ||||
13885 | bool NeedsCollectableMemCpy = | ||||
13886 | E->isRecordType() && | ||||
13887 | E->castAs<RecordType>()->getDecl()->hasObjectMember(); | ||||
13888 | |||||
13889 | // Create a reference to the __builtin_objc_memmove_collectable function | ||||
13890 | StringRef MemCpyName = NeedsCollectableMemCpy ? | ||||
13891 | "__builtin_objc_memmove_collectable" : | ||||
13892 | "__builtin_memcpy"; | ||||
13893 | LookupResult R(S, &S.Context.Idents.get(MemCpyName), Loc, | ||||
13894 | Sema::LookupOrdinaryName); | ||||
13895 | S.LookupName(R, S.TUScope, true); | ||||
13896 | |||||
13897 | FunctionDecl *MemCpy = R.getAsSingle<FunctionDecl>(); | ||||
13898 | if (!MemCpy) | ||||
13899 | // Something went horribly wrong earlier, and we will have complained | ||||
13900 | // about it. | ||||
13901 | return StmtError(); | ||||
13902 | |||||
13903 | ExprResult MemCpyRef = S.BuildDeclRefExpr(MemCpy, S.Context.BuiltinFnTy, | ||||
13904 | VK_PRValue, Loc, nullptr); | ||||
13905 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13905, __extension__ __PRETTY_FUNCTION__)); | ||||
13906 | |||||
13907 | Expr *CallArgs[] = { | ||||
13908 | To, From, IntegerLiteral::Create(S.Context, Size, SizeType, Loc) | ||||
13909 | }; | ||||
13910 | ExprResult Call = S.BuildCallExpr(/*Scope=*/nullptr, MemCpyRef.get(), | ||||
13911 | Loc, CallArgs, Loc); | ||||
13912 | |||||
13913 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 13913, __extension__ __PRETTY_FUNCTION__)); | ||||
13914 | return Call.getAs<Stmt>(); | ||||
13915 | } | ||||
13916 | |||||
13917 | /// Builds a statement that copies/moves the given entity from \p From to | ||||
13918 | /// \c To. | ||||
13919 | /// | ||||
13920 | /// This routine is used to copy/move the members of a class with an | ||||
13921 | /// implicitly-declared copy/move assignment operator. When the entities being | ||||
13922 | /// copied are arrays, this routine builds for loops to copy them. | ||||
13923 | /// | ||||
13924 | /// \param S The Sema object used for type-checking. | ||||
13925 | /// | ||||
13926 | /// \param Loc The location where the implicit copy/move is being generated. | ||||
13927 | /// | ||||
13928 | /// \param T The type of the expressions being copied/moved. Both expressions | ||||
13929 | /// must have this type. | ||||
13930 | /// | ||||
13931 | /// \param To The expression we are copying/moving to. | ||||
13932 | /// | ||||
13933 | /// \param From The expression we are copying/moving from. | ||||
13934 | /// | ||||
13935 | /// \param CopyingBaseSubobject Whether we're copying/moving a base subobject. | ||||
13936 | /// Otherwise, it's a non-static member subobject. | ||||
13937 | /// | ||||
13938 | /// \param Copying Whether we're copying or moving. | ||||
13939 | /// | ||||
13940 | /// \param Depth Internal parameter recording the depth of the recursion. | ||||
13941 | /// | ||||
13942 | /// \returns A statement or a loop that copies the expressions, or StmtResult(0) | ||||
13943 | /// if a memcpy should be used instead. | ||||
13944 | static StmtResult | ||||
13945 | buildSingleCopyAssignRecursively(Sema &S, SourceLocation Loc, QualType T, | ||||
13946 | const ExprBuilder &To, const ExprBuilder &From, | ||||
13947 | bool CopyingBaseSubobject, bool Copying, | ||||
13948 | unsigned Depth = 0) { | ||||
13949 | // C++11 [class.copy]p28: | ||||
13950 | // Each subobject is assigned in the manner appropriate to its type: | ||||
13951 | // | ||||
13952 | // - if the subobject is of class type, as if by a call to operator= with | ||||
13953 | // the subobject as the object expression and the corresponding | ||||
13954 | // subobject of x as a single function argument (as if by explicit | ||||
13955 | // qualification; that is, ignoring any possible virtual overriding | ||||
13956 | // functions in more derived classes); | ||||
13957 | // | ||||
13958 | // C++03 [class.copy]p13: | ||||
13959 | // - if the subobject is of class type, the copy assignment operator for | ||||
13960 | // the class is used (as if by explicit qualification; that is, | ||||
13961 | // ignoring any possible virtual overriding functions in more derived | ||||
13962 | // classes); | ||||
13963 | if (const RecordType *RecordTy = T->getAs<RecordType>()) { | ||||
13964 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||
13965 | |||||
13966 | // Look for operator=. | ||||
13967 | DeclarationName Name | ||||
13968 | = S.Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||
13969 | LookupResult OpLookup(S, Name, Loc, Sema::LookupOrdinaryName); | ||||
13970 | S.LookupQualifiedName(OpLookup, ClassDecl, false); | ||||
13971 | |||||
13972 | // Prior to C++11, filter out any result that isn't a copy/move-assignment | ||||
13973 | // operator. | ||||
13974 | if (!S.getLangOpts().CPlusPlus11) { | ||||
13975 | LookupResult::Filter F = OpLookup.makeFilter(); | ||||
13976 | while (F.hasNext()) { | ||||
13977 | NamedDecl *D = F.next(); | ||||
13978 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) | ||||
13979 | if (Method->isCopyAssignmentOperator() || | ||||
13980 | (!Copying && Method->isMoveAssignmentOperator())) | ||||
13981 | continue; | ||||
13982 | |||||
13983 | F.erase(); | ||||
13984 | } | ||||
13985 | F.done(); | ||||
13986 | } | ||||
13987 | |||||
13988 | // Suppress the protected check (C++ [class.protected]) for each of the | ||||
13989 | // assignment operators we found. This strange dance is required when | ||||
13990 | // we're assigning via a base classes's copy-assignment operator. To | ||||
13991 | // ensure that we're getting the right base class subobject (without | ||||
13992 | // ambiguities), we need to cast "this" to that subobject type; to | ||||
13993 | // ensure that we don't go through the virtual call mechanism, we need | ||||
13994 | // to qualify the operator= name with the base class (see below). However, | ||||
13995 | // this means that if the base class has a protected copy assignment | ||||
13996 | // operator, the protected member access check will fail. So, we | ||||
13997 | // rewrite "protected" access to "public" access in this case, since we | ||||
13998 | // know by construction that we're calling from a derived class. | ||||
13999 | if (CopyingBaseSubobject) { | ||||
14000 | for (LookupResult::iterator L = OpLookup.begin(), LEnd = OpLookup.end(); | ||||
14001 | L != LEnd; ++L) { | ||||
14002 | if (L.getAccess() == AS_protected) | ||||
14003 | L.setAccess(AS_public); | ||||
14004 | } | ||||
14005 | } | ||||
14006 | |||||
14007 | // Create the nested-name-specifier that will be used to qualify the | ||||
14008 | // reference to operator=; this is required to suppress the virtual | ||||
14009 | // call mechanism. | ||||
14010 | CXXScopeSpec SS; | ||||
14011 | const Type *CanonicalT = S.Context.getCanonicalType(T.getTypePtr()); | ||||
14012 | SS.MakeTrivial(S.Context, | ||||
14013 | NestedNameSpecifier::Create(S.Context, nullptr, false, | ||||
14014 | CanonicalT), | ||||
14015 | Loc); | ||||
14016 | |||||
14017 | // Create the reference to operator=. | ||||
14018 | ExprResult OpEqualRef | ||||
14019 | = S.BuildMemberReferenceExpr(To.build(S, Loc), T, Loc, /*IsArrow=*/false, | ||||
14020 | SS, /*TemplateKWLoc=*/SourceLocation(), | ||||
14021 | /*FirstQualifierInScope=*/nullptr, | ||||
14022 | OpLookup, | ||||
14023 | /*TemplateArgs=*/nullptr, /*S*/nullptr, | ||||
14024 | /*SuppressQualifierCheck=*/true); | ||||
14025 | if (OpEqualRef.isInvalid()) | ||||
14026 | return StmtError(); | ||||
14027 | |||||
14028 | // Build the call to the assignment operator. | ||||
14029 | |||||
14030 | Expr *FromInst = From.build(S, Loc); | ||||
14031 | ExprResult Call = S.BuildCallToMemberFunction(/*Scope=*/nullptr, | ||||
14032 | OpEqualRef.getAs<Expr>(), | ||||
14033 | Loc, FromInst, Loc); | ||||
14034 | if (Call.isInvalid()) | ||||
14035 | return StmtError(); | ||||
14036 | |||||
14037 | // If we built a call to a trivial 'operator=' while copying an array, | ||||
14038 | // bail out. We'll replace the whole shebang with a memcpy. | ||||
14039 | CXXMemberCallExpr *CE = dyn_cast<CXXMemberCallExpr>(Call.get()); | ||||
14040 | if (CE && CE->getMethodDecl()->isTrivial() && Depth) | ||||
14041 | return StmtResult((Stmt*)nullptr); | ||||
14042 | |||||
14043 | // Convert to an expression-statement, and clean up any produced | ||||
14044 | // temporaries. | ||||
14045 | return S.ActOnExprStmt(Call); | ||||
14046 | } | ||||
14047 | |||||
14048 | // - if the subobject is of scalar type, the built-in assignment | ||||
14049 | // operator is used. | ||||
14050 | const ConstantArrayType *ArrayTy = S.Context.getAsConstantArrayType(T); | ||||
14051 | if (!ArrayTy) { | ||||
14052 | ExprResult Assignment = S.CreateBuiltinBinOp( | ||||
14053 | Loc, BO_Assign, To.build(S, Loc), From.build(S, Loc)); | ||||
14054 | if (Assignment.isInvalid()) | ||||
14055 | return StmtError(); | ||||
14056 | return S.ActOnExprStmt(Assignment); | ||||
14057 | } | ||||
14058 | |||||
14059 | // - if the subobject is an array, each element is assigned, in the | ||||
14060 | // manner appropriate to the element type; | ||||
14061 | |||||
14062 | // Construct a loop over the array bounds, e.g., | ||||
14063 | // | ||||
14064 | // for (__SIZE_TYPE__ i0 = 0; i0 != array-size; ++i0) | ||||
14065 | // | ||||
14066 | // that will copy each of the array elements. | ||||
14067 | QualType SizeType = S.Context.getSizeType(); | ||||
14068 | |||||
14069 | // Create the iteration variable. | ||||
14070 | IdentifierInfo *IterationVarName = nullptr; | ||||
14071 | { | ||||
14072 | SmallString<8> Str; | ||||
14073 | llvm::raw_svector_ostream OS(Str); | ||||
14074 | OS << "__i" << Depth; | ||||
14075 | IterationVarName = &S.Context.Idents.get(OS.str()); | ||||
14076 | } | ||||
14077 | VarDecl *IterationVar = VarDecl::Create(S.Context, S.CurContext, Loc, Loc, | ||||
14078 | IterationVarName, SizeType, | ||||
14079 | S.Context.getTrivialTypeSourceInfo(SizeType, Loc), | ||||
14080 | SC_None); | ||||
14081 | |||||
14082 | // Initialize the iteration variable to zero. | ||||
14083 | llvm::APInt Zero(S.Context.getTypeSize(SizeType), 0); | ||||
14084 | IterationVar->setInit(IntegerLiteral::Create(S.Context, Zero, SizeType, Loc)); | ||||
14085 | |||||
14086 | // Creates a reference to the iteration variable. | ||||
14087 | RefBuilder IterationVarRef(IterationVar, SizeType); | ||||
14088 | LvalueConvBuilder IterationVarRefRVal(IterationVarRef); | ||||
14089 | |||||
14090 | // Create the DeclStmt that holds the iteration variable. | ||||
14091 | Stmt *InitStmt = new (S.Context) DeclStmt(DeclGroupRef(IterationVar),Loc,Loc); | ||||
14092 | |||||
14093 | // Subscript the "from" and "to" expressions with the iteration variable. | ||||
14094 | SubscriptBuilder FromIndexCopy(From, IterationVarRefRVal); | ||||
14095 | MoveCastBuilder FromIndexMove(FromIndexCopy); | ||||
14096 | const ExprBuilder *FromIndex; | ||||
14097 | if (Copying) | ||||
14098 | FromIndex = &FromIndexCopy; | ||||
14099 | else | ||||
14100 | FromIndex = &FromIndexMove; | ||||
14101 | |||||
14102 | SubscriptBuilder ToIndex(To, IterationVarRefRVal); | ||||
14103 | |||||
14104 | // Build the copy/move for an individual element of the array. | ||||
14105 | StmtResult Copy = | ||||
14106 | buildSingleCopyAssignRecursively(S, Loc, ArrayTy->getElementType(), | ||||
14107 | ToIndex, *FromIndex, CopyingBaseSubobject, | ||||
14108 | Copying, Depth + 1); | ||||
14109 | // Bail out if copying fails or if we determined that we should use memcpy. | ||||
14110 | if (Copy.isInvalid() || !Copy.get()) | ||||
14111 | return Copy; | ||||
14112 | |||||
14113 | // Create the comparison against the array bound. | ||||
14114 | llvm::APInt Upper | ||||
14115 | = ArrayTy->getSize().zextOrTrunc(S.Context.getTypeSize(SizeType)); | ||||
14116 | Expr *Comparison = BinaryOperator::Create( | ||||
14117 | S.Context, IterationVarRefRVal.build(S, Loc), | ||||
14118 | IntegerLiteral::Create(S.Context, Upper, SizeType, Loc), BO_NE, | ||||
14119 | S.Context.BoolTy, VK_PRValue, OK_Ordinary, Loc, | ||||
14120 | S.CurFPFeatureOverrides()); | ||||
14121 | |||||
14122 | // Create the pre-increment of the iteration variable. We can determine | ||||
14123 | // whether the increment will overflow based on the value of the array | ||||
14124 | // bound. | ||||
14125 | Expr *Increment = UnaryOperator::Create( | ||||
14126 | S.Context, IterationVarRef.build(S, Loc), UO_PreInc, SizeType, VK_LValue, | ||||
14127 | OK_Ordinary, Loc, Upper.isMaxValue(), S.CurFPFeatureOverrides()); | ||||
14128 | |||||
14129 | // Construct the loop that copies all elements of this array. | ||||
14130 | return S.ActOnForStmt( | ||||
14131 | Loc, Loc, InitStmt, | ||||
14132 | S.ActOnCondition(nullptr, Loc, Comparison, Sema::ConditionKind::Boolean), | ||||
14133 | S.MakeFullDiscardedValueExpr(Increment), Loc, Copy.get()); | ||||
14134 | } | ||||
14135 | |||||
14136 | static StmtResult | ||||
14137 | buildSingleCopyAssign(Sema &S, SourceLocation Loc, QualType T, | ||||
14138 | const ExprBuilder &To, const ExprBuilder &From, | ||||
14139 | bool CopyingBaseSubobject, bool Copying) { | ||||
14140 | // Maybe we should use a memcpy? | ||||
14141 | if (T->isArrayType() && !T.isConstQualified() && !T.isVolatileQualified() && | ||||
14142 | T.isTriviallyCopyableType(S.Context)) | ||||
14143 | return buildMemcpyForAssignmentOp(S, Loc, T, To, From); | ||||
14144 | |||||
14145 | StmtResult Result(buildSingleCopyAssignRecursively(S, Loc, T, To, From, | ||||
14146 | CopyingBaseSubobject, | ||||
14147 | Copying, 0)); | ||||
14148 | |||||
14149 | // If we ended up picking a trivial assignment operator for an array of a | ||||
14150 | // non-trivially-copyable class type, just emit a memcpy. | ||||
14151 | if (!Result.isInvalid() && !Result.get()) | ||||
14152 | return buildMemcpyForAssignmentOp(S, Loc, T, To, From); | ||||
14153 | |||||
14154 | return Result; | ||||
14155 | } | ||||
14156 | |||||
14157 | CXXMethodDecl *Sema::DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl) { | ||||
14158 | // Note: The following rules are largely analoguous to the copy | ||||
14159 | // constructor rules. Note that virtual bases are not taken into account | ||||
14160 | // for determining the argument type of the operator. Note also that | ||||
14161 | // operators taking an object instead of a reference are allowed. | ||||
14162 | assert(ClassDecl->needsImplicitCopyAssignment())(static_cast <bool> (ClassDecl->needsImplicitCopyAssignment ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitCopyAssignment()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14162, __extension__ __PRETTY_FUNCTION__)); | ||||
14163 | |||||
14164 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXCopyAssignment); | ||||
14165 | if (DSM.isAlreadyBeingDeclared()) | ||||
14166 | return nullptr; | ||||
14167 | |||||
14168 | QualType ArgType = Context.getTypeDeclType(ClassDecl); | ||||
14169 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||
14170 | if (AS != LangAS::Default) | ||||
14171 | ArgType = Context.getAddrSpaceQualType(ArgType, AS); | ||||
14172 | QualType RetType = Context.getLValueReferenceType(ArgType); | ||||
14173 | bool Const = ClassDecl->implicitCopyAssignmentHasConstParam(); | ||||
14174 | if (Const) | ||||
14175 | ArgType = ArgType.withConst(); | ||||
14176 | |||||
14177 | ArgType = Context.getLValueReferenceType(ArgType); | ||||
14178 | |||||
14179 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||
14180 | CXXCopyAssignment, | ||||
14181 | Const); | ||||
14182 | |||||
14183 | // An implicitly-declared copy assignment operator is an inline public | ||||
14184 | // member of its class. | ||||
14185 | DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||
14186 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||
14187 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||
14188 | CXXMethodDecl *CopyAssignment = CXXMethodDecl::Create( | ||||
14189 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), | ||||
14190 | /*TInfo=*/nullptr, /*StorageClass=*/SC_None, | ||||
14191 | getCurFPFeatures().isFPConstrained(), | ||||
14192 | /*isInline=*/true, | ||||
14193 | Constexpr ? ConstexprSpecKind::Constexpr : ConstexprSpecKind::Unspecified, | ||||
14194 | SourceLocation()); | ||||
14195 | CopyAssignment->setAccess(AS_public); | ||||
14196 | CopyAssignment->setDefaulted(); | ||||
14197 | CopyAssignment->setImplicit(); | ||||
14198 | |||||
14199 | if (getLangOpts().CUDA) { | ||||
14200 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXCopyAssignment, | ||||
14201 | CopyAssignment, | ||||
14202 | /* ConstRHS */ Const, | ||||
14203 | /* Diagnose */ false); | ||||
14204 | } | ||||
14205 | |||||
14206 | setupImplicitSpecialMemberType(CopyAssignment, RetType, ArgType); | ||||
14207 | |||||
14208 | // Add the parameter to the operator. | ||||
14209 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, CopyAssignment, | ||||
14210 | ClassLoc, ClassLoc, | ||||
14211 | /*Id=*/nullptr, ArgType, | ||||
14212 | /*TInfo=*/nullptr, SC_None, | ||||
14213 | nullptr); | ||||
14214 | CopyAssignment->setParams(FromParam); | ||||
14215 | |||||
14216 | CopyAssignment->setTrivial( | ||||
14217 | ClassDecl->needsOverloadResolutionForCopyAssignment() | ||||
14218 | ? SpecialMemberIsTrivial(CopyAssignment, CXXCopyAssignment) | ||||
14219 | : ClassDecl->hasTrivialCopyAssignment()); | ||||
14220 | |||||
14221 | // Note that we have added this copy-assignment operator. | ||||
14222 | ++getASTContext().NumImplicitCopyAssignmentOperatorsDeclared; | ||||
14223 | |||||
14224 | Scope *S = getScopeForContext(ClassDecl); | ||||
14225 | CheckImplicitSpecialMemberDeclaration(S, CopyAssignment); | ||||
14226 | |||||
14227 | if (ShouldDeleteSpecialMember(CopyAssignment, CXXCopyAssignment)) { | ||||
14228 | ClassDecl->setImplicitCopyAssignmentIsDeleted(); | ||||
14229 | SetDeclDeleted(CopyAssignment, ClassLoc); | ||||
14230 | } | ||||
14231 | |||||
14232 | if (S) | ||||
14233 | PushOnScopeChains(CopyAssignment, S, false); | ||||
14234 | ClassDecl->addDecl(CopyAssignment); | ||||
14235 | |||||
14236 | return CopyAssignment; | ||||
14237 | } | ||||
14238 | |||||
14239 | /// Diagnose an implicit copy operation for a class which is odr-used, but | ||||
14240 | /// which is deprecated because the class has a user-declared copy constructor, | ||||
14241 | /// copy assignment operator, or destructor. | ||||
14242 | static void diagnoseDeprecatedCopyOperation(Sema &S, CXXMethodDecl *CopyOp) { | ||||
14243 | assert(CopyOp->isImplicit())(static_cast <bool> (CopyOp->isImplicit()) ? void (0 ) : __assert_fail ("CopyOp->isImplicit()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14243, __extension__ __PRETTY_FUNCTION__)); | ||||
14244 | |||||
14245 | CXXRecordDecl *RD = CopyOp->getParent(); | ||||
14246 | CXXMethodDecl *UserDeclaredOperation = nullptr; | ||||
14247 | |||||
14248 | // In Microsoft mode, assignment operations don't affect constructors and | ||||
14249 | // vice versa. | ||||
14250 | if (RD->hasUserDeclaredDestructor()) { | ||||
14251 | UserDeclaredOperation = RD->getDestructor(); | ||||
14252 | } else if (!isa<CXXConstructorDecl>(CopyOp) && | ||||
14253 | RD->hasUserDeclaredCopyConstructor() && | ||||
14254 | !S.getLangOpts().MSVCCompat) { | ||||
14255 | // Find any user-declared copy constructor. | ||||
14256 | for (auto *I : RD->ctors()) { | ||||
14257 | if (I->isCopyConstructor()) { | ||||
14258 | UserDeclaredOperation = I; | ||||
14259 | break; | ||||
14260 | } | ||||
14261 | } | ||||
14262 | assert(UserDeclaredOperation)(static_cast <bool> (UserDeclaredOperation) ? void (0) : __assert_fail ("UserDeclaredOperation", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14262, __extension__ __PRETTY_FUNCTION__)); | ||||
14263 | } else if (isa<CXXConstructorDecl>(CopyOp) && | ||||
14264 | RD->hasUserDeclaredCopyAssignment() && | ||||
14265 | !S.getLangOpts().MSVCCompat) { | ||||
14266 | // Find any user-declared move assignment operator. | ||||
14267 | for (auto *I : RD->methods()) { | ||||
14268 | if (I->isCopyAssignmentOperator()) { | ||||
14269 | UserDeclaredOperation = I; | ||||
14270 | break; | ||||
14271 | } | ||||
14272 | } | ||||
14273 | assert(UserDeclaredOperation)(static_cast <bool> (UserDeclaredOperation) ? void (0) : __assert_fail ("UserDeclaredOperation", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14273, __extension__ __PRETTY_FUNCTION__)); | ||||
14274 | } | ||||
14275 | |||||
14276 | if (UserDeclaredOperation) { | ||||
14277 | bool UDOIsUserProvided = UserDeclaredOperation->isUserProvided(); | ||||
14278 | bool UDOIsDestructor = isa<CXXDestructorDecl>(UserDeclaredOperation); | ||||
14279 | bool IsCopyAssignment = !isa<CXXConstructorDecl>(CopyOp); | ||||
14280 | unsigned DiagID = | ||||
14281 | (UDOIsUserProvided && UDOIsDestructor) | ||||
14282 | ? diag::warn_deprecated_copy_with_user_provided_dtor | ||||
14283 | : (UDOIsUserProvided && !UDOIsDestructor) | ||||
14284 | ? diag::warn_deprecated_copy_with_user_provided_copy | ||||
14285 | : (!UDOIsUserProvided && UDOIsDestructor) | ||||
14286 | ? diag::warn_deprecated_copy_with_dtor | ||||
14287 | : diag::warn_deprecated_copy; | ||||
14288 | S.Diag(UserDeclaredOperation->getLocation(), DiagID) | ||||
14289 | << RD << IsCopyAssignment; | ||||
14290 | } | ||||
14291 | } | ||||
14292 | |||||
14293 | void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation, | ||||
14294 | CXXMethodDecl *CopyAssignOperator) { | ||||
14295 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14300, __extension__ __PRETTY_FUNCTION__)) | ||||
14296 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14300, __extension__ __PRETTY_FUNCTION__)) | ||||
14297 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14300, __extension__ __PRETTY_FUNCTION__)) | ||||
14298 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14300, __extension__ __PRETTY_FUNCTION__)) | ||||
14299 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14300, __extension__ __PRETTY_FUNCTION__)) | ||||
14300 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14300, __extension__ __PRETTY_FUNCTION__)); | ||||
14301 | if (CopyAssignOperator->willHaveBody() || CopyAssignOperator->isInvalidDecl()) | ||||
14302 | return; | ||||
14303 | |||||
14304 | CXXRecordDecl *ClassDecl = CopyAssignOperator->getParent(); | ||||
14305 | if (ClassDecl->isInvalidDecl()) { | ||||
14306 | CopyAssignOperator->setInvalidDecl(); | ||||
14307 | return; | ||||
14308 | } | ||||
14309 | |||||
14310 | SynthesizedFunctionScope Scope(*this, CopyAssignOperator); | ||||
14311 | |||||
14312 | // The exception specification is needed because we are defining the | ||||
14313 | // function. | ||||
14314 | ResolveExceptionSpec(CurrentLocation, | ||||
14315 | CopyAssignOperator->getType()->castAs<FunctionProtoType>()); | ||||
14316 | |||||
14317 | // Add a context note for diagnostics produced after this point. | ||||
14318 | Scope.addContextNote(CurrentLocation); | ||||
14319 | |||||
14320 | // C++11 [class.copy]p18: | ||||
14321 | // The [definition of an implicitly declared copy assignment operator] is | ||||
14322 | // deprecated if the class has a user-declared copy constructor or a | ||||
14323 | // user-declared destructor. | ||||
14324 | if (getLangOpts().CPlusPlus11 && CopyAssignOperator->isImplicit()) | ||||
14325 | diagnoseDeprecatedCopyOperation(*this, CopyAssignOperator); | ||||
14326 | |||||
14327 | // C++0x [class.copy]p30: | ||||
14328 | // The implicitly-defined or explicitly-defaulted copy assignment operator | ||||
14329 | // for a non-union class X performs memberwise copy assignment of its | ||||
14330 | // subobjects. The direct base classes of X are assigned first, in the | ||||
14331 | // order of their declaration in the base-specifier-list, and then the | ||||
14332 | // immediate non-static data members of X are assigned, in the order in | ||||
14333 | // which they were declared in the class definition. | ||||
14334 | |||||
14335 | // The statements that form the synthesized function body. | ||||
14336 | SmallVector<Stmt*, 8> Statements; | ||||
14337 | |||||
14338 | // The parameter for the "other" object, which we are copying from. | ||||
14339 | ParmVarDecl *Other = CopyAssignOperator->getParamDecl(0); | ||||
14340 | Qualifiers OtherQuals = Other->getType().getQualifiers(); | ||||
14341 | QualType OtherRefType = Other->getType(); | ||||
14342 | if (const LValueReferenceType *OtherRef | ||||
14343 | = OtherRefType->getAs<LValueReferenceType>()) { | ||||
14344 | OtherRefType = OtherRef->getPointeeType(); | ||||
14345 | OtherQuals = OtherRefType.getQualifiers(); | ||||
14346 | } | ||||
14347 | |||||
14348 | // Our location for everything implicitly-generated. | ||||
14349 | SourceLocation Loc = CopyAssignOperator->getEndLoc().isValid() | ||||
14350 | ? CopyAssignOperator->getEndLoc() | ||||
14351 | : CopyAssignOperator->getLocation(); | ||||
14352 | |||||
14353 | // Builds a DeclRefExpr for the "other" object. | ||||
14354 | RefBuilder OtherRef(Other, OtherRefType); | ||||
14355 | |||||
14356 | // Builds the "this" pointer. | ||||
14357 | ThisBuilder This; | ||||
14358 | |||||
14359 | // Assign base classes. | ||||
14360 | bool Invalid = false; | ||||
14361 | for (auto &Base : ClassDecl->bases()) { | ||||
14362 | // Form the assignment: | ||||
14363 | // static_cast<Base*>(this)->Base::operator=(static_cast<Base&>(other)); | ||||
14364 | QualType BaseType = Base.getType().getUnqualifiedType(); | ||||
14365 | if (!BaseType->isRecordType()) { | ||||
14366 | Invalid = true; | ||||
14367 | continue; | ||||
14368 | } | ||||
14369 | |||||
14370 | CXXCastPath BasePath; | ||||
14371 | BasePath.push_back(&Base); | ||||
14372 | |||||
14373 | // Construct the "from" expression, which is an implicit cast to the | ||||
14374 | // appropriately-qualified base type. | ||||
14375 | CastBuilder From(OtherRef, Context.getQualifiedType(BaseType, OtherQuals), | ||||
14376 | VK_LValue, BasePath); | ||||
14377 | |||||
14378 | // Dereference "this". | ||||
14379 | DerefBuilder DerefThis(This); | ||||
14380 | CastBuilder To(DerefThis, | ||||
14381 | Context.getQualifiedType( | ||||
14382 | BaseType, CopyAssignOperator->getMethodQualifiers()), | ||||
14383 | VK_LValue, BasePath); | ||||
14384 | |||||
14385 | // Build the copy. | ||||
14386 | StmtResult Copy = buildSingleCopyAssign(*this, Loc, BaseType, | ||||
14387 | To, From, | ||||
14388 | /*CopyingBaseSubobject=*/true, | ||||
14389 | /*Copying=*/true); | ||||
14390 | if (Copy.isInvalid()) { | ||||
14391 | CopyAssignOperator->setInvalidDecl(); | ||||
14392 | return; | ||||
14393 | } | ||||
14394 | |||||
14395 | // Success! Record the copy. | ||||
14396 | Statements.push_back(Copy.getAs<Expr>()); | ||||
14397 | } | ||||
14398 | |||||
14399 | // Assign non-static members. | ||||
14400 | for (auto *Field : ClassDecl->fields()) { | ||||
14401 | // FIXME: We should form some kind of AST representation for the implied | ||||
14402 | // memcpy in a union copy operation. | ||||
14403 | if (Field->isUnnamedBitfield() || Field->getParent()->isUnion()) | ||||
14404 | continue; | ||||
14405 | |||||
14406 | if (Field->isInvalidDecl()) { | ||||
14407 | Invalid = true; | ||||
14408 | continue; | ||||
14409 | } | ||||
14410 | |||||
14411 | // Check for members of reference type; we can't copy those. | ||||
14412 | if (Field->getType()->isReferenceType()) { | ||||
14413 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||
14414 | << Context.getTagDeclType(ClassDecl) << 0 << Field->getDeclName(); | ||||
14415 | Diag(Field->getLocation(), diag::note_declared_at); | ||||
14416 | Invalid = true; | ||||
14417 | continue; | ||||
14418 | } | ||||
14419 | |||||
14420 | // Check for members of const-qualified, non-class type. | ||||
14421 | QualType BaseType = Context.getBaseElementType(Field->getType()); | ||||
14422 | if (!BaseType->getAs<RecordType>() && BaseType.isConstQualified()) { | ||||
14423 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||
14424 | << Context.getTagDeclType(ClassDecl) << 1 << Field->getDeclName(); | ||||
14425 | Diag(Field->getLocation(), diag::note_declared_at); | ||||
14426 | Invalid = true; | ||||
14427 | continue; | ||||
14428 | } | ||||
14429 | |||||
14430 | // Suppress assigning zero-width bitfields. | ||||
14431 | if (Field->isZeroLengthBitField(Context)) | ||||
14432 | continue; | ||||
14433 | |||||
14434 | QualType FieldType = Field->getType().getNonReferenceType(); | ||||
14435 | if (FieldType->isIncompleteArrayType()) { | ||||
14436 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14437, __extension__ __PRETTY_FUNCTION__)) | ||||
14437 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14437, __extension__ __PRETTY_FUNCTION__)); | ||||
14438 | continue; | ||||
14439 | } | ||||
14440 | |||||
14441 | // Build references to the field in the object we're copying from and to. | ||||
14442 | CXXScopeSpec SS; // Intentionally empty | ||||
14443 | LookupResult MemberLookup(*this, Field->getDeclName(), Loc, | ||||
14444 | LookupMemberName); | ||||
14445 | MemberLookup.addDecl(Field); | ||||
14446 | MemberLookup.resolveKind(); | ||||
14447 | |||||
14448 | MemberBuilder From(OtherRef, OtherRefType, /*IsArrow=*/false, MemberLookup); | ||||
14449 | |||||
14450 | MemberBuilder To(This, getCurrentThisType(), /*IsArrow=*/true, MemberLookup); | ||||
14451 | |||||
14452 | // Build the copy of this field. | ||||
14453 | StmtResult Copy = buildSingleCopyAssign(*this, Loc, FieldType, | ||||
14454 | To, From, | ||||
14455 | /*CopyingBaseSubobject=*/false, | ||||
14456 | /*Copying=*/true); | ||||
14457 | if (Copy.isInvalid()) { | ||||
14458 | CopyAssignOperator->setInvalidDecl(); | ||||
14459 | return; | ||||
14460 | } | ||||
14461 | |||||
14462 | // Success! Record the copy. | ||||
14463 | Statements.push_back(Copy.getAs<Stmt>()); | ||||
14464 | } | ||||
14465 | |||||
14466 | if (!Invalid) { | ||||
14467 | // Add a "return *this;" | ||||
14468 | ExprResult ThisObj = CreateBuiltinUnaryOp(Loc, UO_Deref, This.build(*this, Loc)); | ||||
14469 | |||||
14470 | StmtResult Return = BuildReturnStmt(Loc, ThisObj.get()); | ||||
14471 | if (Return.isInvalid()) | ||||
14472 | Invalid = true; | ||||
14473 | else | ||||
14474 | Statements.push_back(Return.getAs<Stmt>()); | ||||
14475 | } | ||||
14476 | |||||
14477 | if (Invalid) { | ||||
14478 | CopyAssignOperator->setInvalidDecl(); | ||||
14479 | return; | ||||
14480 | } | ||||
14481 | |||||
14482 | StmtResult Body; | ||||
14483 | { | ||||
14484 | CompoundScopeRAII CompoundScope(*this); | ||||
14485 | Body = ActOnCompoundStmt(Loc, Loc, Statements, | ||||
14486 | /*isStmtExpr=*/false); | ||||
14487 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14487, __extension__ __PRETTY_FUNCTION__)); | ||||
14488 | } | ||||
14489 | CopyAssignOperator->setBody(Body.getAs<Stmt>()); | ||||
14490 | CopyAssignOperator->markUsed(Context); | ||||
14491 | |||||
14492 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
14493 | L->CompletedImplicitDefinition(CopyAssignOperator); | ||||
14494 | } | ||||
14495 | } | ||||
14496 | |||||
14497 | CXXMethodDecl *Sema::DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl) { | ||||
14498 | assert(ClassDecl->needsImplicitMoveAssignment())(static_cast <bool> (ClassDecl->needsImplicitMoveAssignment ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitMoveAssignment()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14498, __extension__ __PRETTY_FUNCTION__)); | ||||
14499 | |||||
14500 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXMoveAssignment); | ||||
14501 | if (DSM.isAlreadyBeingDeclared()) | ||||
14502 | return nullptr; | ||||
14503 | |||||
14504 | // Note: The following rules are largely analoguous to the move | ||||
14505 | // constructor rules. | ||||
14506 | |||||
14507 | QualType ArgType = Context.getTypeDeclType(ClassDecl); | ||||
14508 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||
14509 | if (AS != LangAS::Default) | ||||
14510 | ArgType = Context.getAddrSpaceQualType(ArgType, AS); | ||||
14511 | QualType RetType = Context.getLValueReferenceType(ArgType); | ||||
14512 | ArgType = Context.getRValueReferenceType(ArgType); | ||||
14513 | |||||
14514 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||
14515 | CXXMoveAssignment, | ||||
14516 | false); | ||||
14517 | |||||
14518 | // An implicitly-declared move assignment operator is an inline public | ||||
14519 | // member of its class. | ||||
14520 | DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||
14521 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||
14522 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||
14523 | CXXMethodDecl *MoveAssignment = CXXMethodDecl::Create( | ||||
14524 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), | ||||
14525 | /*TInfo=*/nullptr, /*StorageClass=*/SC_None, | ||||
14526 | getCurFPFeatures().isFPConstrained(), | ||||
14527 | /*isInline=*/true, | ||||
14528 | Constexpr ? ConstexprSpecKind::Constexpr : ConstexprSpecKind::Unspecified, | ||||
14529 | SourceLocation()); | ||||
14530 | MoveAssignment->setAccess(AS_public); | ||||
14531 | MoveAssignment->setDefaulted(); | ||||
14532 | MoveAssignment->setImplicit(); | ||||
14533 | |||||
14534 | if (getLangOpts().CUDA) { | ||||
14535 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXMoveAssignment, | ||||
14536 | MoveAssignment, | ||||
14537 | /* ConstRHS */ false, | ||||
14538 | /* Diagnose */ false); | ||||
14539 | } | ||||
14540 | |||||
14541 | setupImplicitSpecialMemberType(MoveAssignment, RetType, ArgType); | ||||
14542 | |||||
14543 | // Add the parameter to the operator. | ||||
14544 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, MoveAssignment, | ||||
14545 | ClassLoc, ClassLoc, | ||||
14546 | /*Id=*/nullptr, ArgType, | ||||
14547 | /*TInfo=*/nullptr, SC_None, | ||||
14548 | nullptr); | ||||
14549 | MoveAssignment->setParams(FromParam); | ||||
14550 | |||||
14551 | MoveAssignment->setTrivial( | ||||
14552 | ClassDecl->needsOverloadResolutionForMoveAssignment() | ||||
14553 | ? SpecialMemberIsTrivial(MoveAssignment, CXXMoveAssignment) | ||||
14554 | : ClassDecl->hasTrivialMoveAssignment()); | ||||
14555 | |||||
14556 | // Note that we have added this copy-assignment operator. | ||||
14557 | ++getASTContext().NumImplicitMoveAssignmentOperatorsDeclared; | ||||
14558 | |||||
14559 | Scope *S = getScopeForContext(ClassDecl); | ||||
14560 | CheckImplicitSpecialMemberDeclaration(S, MoveAssignment); | ||||
14561 | |||||
14562 | if (ShouldDeleteSpecialMember(MoveAssignment, CXXMoveAssignment)) { | ||||
14563 | ClassDecl->setImplicitMoveAssignmentIsDeleted(); | ||||
14564 | SetDeclDeleted(MoveAssignment, ClassLoc); | ||||
14565 | } | ||||
14566 | |||||
14567 | if (S) | ||||
14568 | PushOnScopeChains(MoveAssignment, S, false); | ||||
14569 | ClassDecl->addDecl(MoveAssignment); | ||||
14570 | |||||
14571 | return MoveAssignment; | ||||
14572 | } | ||||
14573 | |||||
14574 | /// Check if we're implicitly defining a move assignment operator for a class | ||||
14575 | /// with virtual bases. Such a move assignment might move-assign the virtual | ||||
14576 | /// base multiple times. | ||||
14577 | static void checkMoveAssignmentForRepeatedMove(Sema &S, CXXRecordDecl *Class, | ||||
14578 | SourceLocation CurrentLocation) { | ||||
14579 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14579, __extension__ __PRETTY_FUNCTION__)); | ||||
14580 | |||||
14581 | // Only a virtual base could get implicitly move-assigned multiple times. | ||||
14582 | // Only a non-trivial move assignment can observe this. We only want to | ||||
14583 | // diagnose if we implicitly define an assignment operator that assigns | ||||
14584 | // two base classes, both of which move-assign the same virtual base. | ||||
14585 | if (Class->getNumVBases() == 0 || Class->hasTrivialMoveAssignment() || | ||||
14586 | Class->getNumBases() < 2) | ||||
14587 | return; | ||||
14588 | |||||
14589 | llvm::SmallVector<CXXBaseSpecifier *, 16> Worklist; | ||||
14590 | typedef llvm::DenseMap<CXXRecordDecl*, CXXBaseSpecifier*> VBaseMap; | ||||
14591 | VBaseMap VBases; | ||||
14592 | |||||
14593 | for (auto &BI : Class->bases()) { | ||||
14594 | Worklist.push_back(&BI); | ||||
14595 | while (!Worklist.empty()) { | ||||
14596 | CXXBaseSpecifier *BaseSpec = Worklist.pop_back_val(); | ||||
14597 | CXXRecordDecl *Base = BaseSpec->getType()->getAsCXXRecordDecl(); | ||||
14598 | |||||
14599 | // If the base has no non-trivial move assignment operators, | ||||
14600 | // we don't care about moves from it. | ||||
14601 | if (!Base->hasNonTrivialMoveAssignment()) | ||||
14602 | continue; | ||||
14603 | |||||
14604 | // If there's nothing virtual here, skip it. | ||||
14605 | if (!BaseSpec->isVirtual() && !Base->getNumVBases()) | ||||
14606 | continue; | ||||
14607 | |||||
14608 | // If we're not actually going to call a move assignment for this base, | ||||
14609 | // or the selected move assignment is trivial, skip it. | ||||
14610 | Sema::SpecialMemberOverloadResult SMOR = | ||||
14611 | S.LookupSpecialMember(Base, Sema::CXXMoveAssignment, | ||||
14612 | /*ConstArg*/false, /*VolatileArg*/false, | ||||
14613 | /*RValueThis*/true, /*ConstThis*/false, | ||||
14614 | /*VolatileThis*/false); | ||||
14615 | if (!SMOR.getMethod() || SMOR.getMethod()->isTrivial() || | ||||
14616 | !SMOR.getMethod()->isMoveAssignmentOperator()) | ||||
14617 | continue; | ||||
14618 | |||||
14619 | if (BaseSpec->isVirtual()) { | ||||
14620 | // We're going to move-assign this virtual base, and its move | ||||
14621 | // assignment operator is not trivial. If this can happen for | ||||
14622 | // multiple distinct direct bases of Class, diagnose it. (If it | ||||
14623 | // only happens in one base, we'll diagnose it when synthesizing | ||||
14624 | // that base class's move assignment operator.) | ||||
14625 | CXXBaseSpecifier *&Existing = | ||||
14626 | VBases.insert(std::make_pair(Base->getCanonicalDecl(), &BI)) | ||||
14627 | .first->second; | ||||
14628 | if (Existing && Existing != &BI) { | ||||
14629 | S.Diag(CurrentLocation, diag::warn_vbase_moved_multiple_times) | ||||
14630 | << Class << Base; | ||||
14631 | S.Diag(Existing->getBeginLoc(), diag::note_vbase_moved_here) | ||||
14632 | << (Base->getCanonicalDecl() == | ||||
14633 | Existing->getType()->getAsCXXRecordDecl()->getCanonicalDecl()) | ||||
14634 | << Base << Existing->getType() << Existing->getSourceRange(); | ||||
14635 | S.Diag(BI.getBeginLoc(), diag::note_vbase_moved_here) | ||||
14636 | << (Base->getCanonicalDecl() == | ||||
14637 | BI.getType()->getAsCXXRecordDecl()->getCanonicalDecl()) | ||||
14638 | << Base << BI.getType() << BaseSpec->getSourceRange(); | ||||
14639 | |||||
14640 | // Only diagnose each vbase once. | ||||
14641 | Existing = nullptr; | ||||
14642 | } | ||||
14643 | } else { | ||||
14644 | // Only walk over bases that have defaulted move assignment operators. | ||||
14645 | // We assume that any user-provided move assignment operator handles | ||||
14646 | // the multiple-moves-of-vbase case itself somehow. | ||||
14647 | if (!SMOR.getMethod()->isDefaulted()) | ||||
14648 | continue; | ||||
14649 | |||||
14650 | // We're going to move the base classes of Base. Add them to the list. | ||||
14651 | for (auto &BI : Base->bases()) | ||||
14652 | Worklist.push_back(&BI); | ||||
14653 | } | ||||
14654 | } | ||||
14655 | } | ||||
14656 | } | ||||
14657 | |||||
14658 | void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation, | ||||
14659 | CXXMethodDecl *MoveAssignOperator) { | ||||
14660 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14665, __extension__ __PRETTY_FUNCTION__)) | ||||
14661 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14665, __extension__ __PRETTY_FUNCTION__)) | ||||
14662 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14665, __extension__ __PRETTY_FUNCTION__)) | ||||
14663 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14665, __extension__ __PRETTY_FUNCTION__)) | ||||
14664 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14665, __extension__ __PRETTY_FUNCTION__)) | ||||
14665 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14665, __extension__ __PRETTY_FUNCTION__)); | ||||
14666 | if (MoveAssignOperator->willHaveBody() || MoveAssignOperator->isInvalidDecl()) | ||||
14667 | return; | ||||
14668 | |||||
14669 | CXXRecordDecl *ClassDecl = MoveAssignOperator->getParent(); | ||||
14670 | if (ClassDecl->isInvalidDecl()) { | ||||
14671 | MoveAssignOperator->setInvalidDecl(); | ||||
14672 | return; | ||||
14673 | } | ||||
14674 | |||||
14675 | // C++0x [class.copy]p28: | ||||
14676 | // The implicitly-defined or move assignment operator for a non-union class | ||||
14677 | // X performs memberwise move assignment of its subobjects. The direct base | ||||
14678 | // classes of X are assigned first, in the order of their declaration in the | ||||
14679 | // base-specifier-list, and then the immediate non-static data members of X | ||||
14680 | // are assigned, in the order in which they were declared in the class | ||||
14681 | // definition. | ||||
14682 | |||||
14683 | // Issue a warning if our implicit move assignment operator will move | ||||
14684 | // from a virtual base more than once. | ||||
14685 | checkMoveAssignmentForRepeatedMove(*this, ClassDecl, CurrentLocation); | ||||
14686 | |||||
14687 | SynthesizedFunctionScope Scope(*this, MoveAssignOperator); | ||||
14688 | |||||
14689 | // The exception specification is needed because we are defining the | ||||
14690 | // function. | ||||
14691 | ResolveExceptionSpec(CurrentLocation, | ||||
14692 | MoveAssignOperator->getType()->castAs<FunctionProtoType>()); | ||||
14693 | |||||
14694 | // Add a context note for diagnostics produced after this point. | ||||
14695 | Scope.addContextNote(CurrentLocation); | ||||
14696 | |||||
14697 | // The statements that form the synthesized function body. | ||||
14698 | SmallVector<Stmt*, 8> Statements; | ||||
14699 | |||||
14700 | // The parameter for the "other" object, which we are move from. | ||||
14701 | ParmVarDecl *Other = MoveAssignOperator->getParamDecl(0); | ||||
14702 | QualType OtherRefType = | ||||
14703 | Other->getType()->castAs<RValueReferenceType>()->getPointeeType(); | ||||
14704 | |||||
14705 | // Our location for everything implicitly-generated. | ||||
14706 | SourceLocation Loc = MoveAssignOperator->getEndLoc().isValid() | ||||
14707 | ? MoveAssignOperator->getEndLoc() | ||||
14708 | : MoveAssignOperator->getLocation(); | ||||
14709 | |||||
14710 | // Builds a reference to the "other" object. | ||||
14711 | RefBuilder OtherRef(Other, OtherRefType); | ||||
14712 | // Cast to rvalue. | ||||
14713 | MoveCastBuilder MoveOther(OtherRef); | ||||
14714 | |||||
14715 | // Builds the "this" pointer. | ||||
14716 | ThisBuilder This; | ||||
14717 | |||||
14718 | // Assign base classes. | ||||
14719 | bool Invalid = false; | ||||
14720 | for (auto &Base : ClassDecl->bases()) { | ||||
14721 | // C++11 [class.copy]p28: | ||||
14722 | // It is unspecified whether subobjects representing virtual base classes | ||||
14723 | // are assigned more than once by the implicitly-defined copy assignment | ||||
14724 | // operator. | ||||
14725 | // FIXME: Do not assign to a vbase that will be assigned by some other base | ||||
14726 | // class. For a move-assignment, this can result in the vbase being moved | ||||
14727 | // multiple times. | ||||
14728 | |||||
14729 | // Form the assignment: | ||||
14730 | // static_cast<Base*>(this)->Base::operator=(static_cast<Base&&>(other)); | ||||
14731 | QualType BaseType = Base.getType().getUnqualifiedType(); | ||||
14732 | if (!BaseType->isRecordType()) { | ||||
14733 | Invalid = true; | ||||
14734 | continue; | ||||
14735 | } | ||||
14736 | |||||
14737 | CXXCastPath BasePath; | ||||
14738 | BasePath.push_back(&Base); | ||||
14739 | |||||
14740 | // Construct the "from" expression, which is an implicit cast to the | ||||
14741 | // appropriately-qualified base type. | ||||
14742 | CastBuilder From(OtherRef, BaseType, VK_XValue, BasePath); | ||||
14743 | |||||
14744 | // Dereference "this". | ||||
14745 | DerefBuilder DerefThis(This); | ||||
14746 | |||||
14747 | // Implicitly cast "this" to the appropriately-qualified base type. | ||||
14748 | CastBuilder To(DerefThis, | ||||
14749 | Context.getQualifiedType( | ||||
14750 | BaseType, MoveAssignOperator->getMethodQualifiers()), | ||||
14751 | VK_LValue, BasePath); | ||||
14752 | |||||
14753 | // Build the move. | ||||
14754 | StmtResult Move = buildSingleCopyAssign(*this, Loc, BaseType, | ||||
14755 | To, From, | ||||
14756 | /*CopyingBaseSubobject=*/true, | ||||
14757 | /*Copying=*/false); | ||||
14758 | if (Move.isInvalid()) { | ||||
14759 | MoveAssignOperator->setInvalidDecl(); | ||||
14760 | return; | ||||
14761 | } | ||||
14762 | |||||
14763 | // Success! Record the move. | ||||
14764 | Statements.push_back(Move.getAs<Expr>()); | ||||
14765 | } | ||||
14766 | |||||
14767 | // Assign non-static members. | ||||
14768 | for (auto *Field : ClassDecl->fields()) { | ||||
14769 | // FIXME: We should form some kind of AST representation for the implied | ||||
14770 | // memcpy in a union copy operation. | ||||
14771 | if (Field->isUnnamedBitfield() || Field->getParent()->isUnion()) | ||||
14772 | continue; | ||||
14773 | |||||
14774 | if (Field->isInvalidDecl()) { | ||||
14775 | Invalid = true; | ||||
14776 | continue; | ||||
14777 | } | ||||
14778 | |||||
14779 | // Check for members of reference type; we can't move those. | ||||
14780 | if (Field->getType()->isReferenceType()) { | ||||
14781 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||
14782 | << Context.getTagDeclType(ClassDecl) << 0 << Field->getDeclName(); | ||||
14783 | Diag(Field->getLocation(), diag::note_declared_at); | ||||
14784 | Invalid = true; | ||||
14785 | continue; | ||||
14786 | } | ||||
14787 | |||||
14788 | // Check for members of const-qualified, non-class type. | ||||
14789 | QualType BaseType = Context.getBaseElementType(Field->getType()); | ||||
14790 | if (!BaseType->getAs<RecordType>() && BaseType.isConstQualified()) { | ||||
14791 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||
14792 | << Context.getTagDeclType(ClassDecl) << 1 << Field->getDeclName(); | ||||
14793 | Diag(Field->getLocation(), diag::note_declared_at); | ||||
14794 | Invalid = true; | ||||
14795 | continue; | ||||
14796 | } | ||||
14797 | |||||
14798 | // Suppress assigning zero-width bitfields. | ||||
14799 | if (Field->isZeroLengthBitField(Context)) | ||||
14800 | continue; | ||||
14801 | |||||
14802 | QualType FieldType = Field->getType().getNonReferenceType(); | ||||
14803 | if (FieldType->isIncompleteArrayType()) { | ||||
14804 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14805, __extension__ __PRETTY_FUNCTION__)) | ||||
14805 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14805, __extension__ __PRETTY_FUNCTION__)); | ||||
14806 | continue; | ||||
14807 | } | ||||
14808 | |||||
14809 | // Build references to the field in the object we're copying from and to. | ||||
14810 | LookupResult MemberLookup(*this, Field->getDeclName(), Loc, | ||||
14811 | LookupMemberName); | ||||
14812 | MemberLookup.addDecl(Field); | ||||
14813 | MemberLookup.resolveKind(); | ||||
14814 | MemberBuilder From(MoveOther, OtherRefType, | ||||
14815 | /*IsArrow=*/false, MemberLookup); | ||||
14816 | MemberBuilder To(This, getCurrentThisType(), | ||||
14817 | /*IsArrow=*/true, MemberLookup); | ||||
14818 | |||||
14819 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14821, __extension__ __PRETTY_FUNCTION__)) | ||||
14820 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14821, __extension__ __PRETTY_FUNCTION__)) | ||||
14821 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14821, __extension__ __PRETTY_FUNCTION__)); | ||||
14822 | |||||
14823 | // Build the move of this field. | ||||
14824 | StmtResult Move = buildSingleCopyAssign(*this, Loc, FieldType, | ||||
14825 | To, From, | ||||
14826 | /*CopyingBaseSubobject=*/false, | ||||
14827 | /*Copying=*/false); | ||||
14828 | if (Move.isInvalid()) { | ||||
14829 | MoveAssignOperator->setInvalidDecl(); | ||||
14830 | return; | ||||
14831 | } | ||||
14832 | |||||
14833 | // Success! Record the copy. | ||||
14834 | Statements.push_back(Move.getAs<Stmt>()); | ||||
14835 | } | ||||
14836 | |||||
14837 | if (!Invalid) { | ||||
14838 | // Add a "return *this;" | ||||
14839 | ExprResult ThisObj = | ||||
14840 | CreateBuiltinUnaryOp(Loc, UO_Deref, This.build(*this, Loc)); | ||||
14841 | |||||
14842 | StmtResult Return = BuildReturnStmt(Loc, ThisObj.get()); | ||||
14843 | if (Return.isInvalid()) | ||||
14844 | Invalid = true; | ||||
14845 | else | ||||
14846 | Statements.push_back(Return.getAs<Stmt>()); | ||||
14847 | } | ||||
14848 | |||||
14849 | if (Invalid) { | ||||
14850 | MoveAssignOperator->setInvalidDecl(); | ||||
14851 | return; | ||||
14852 | } | ||||
14853 | |||||
14854 | StmtResult Body; | ||||
14855 | { | ||||
14856 | CompoundScopeRAII CompoundScope(*this); | ||||
14857 | Body = ActOnCompoundStmt(Loc, Loc, Statements, | ||||
14858 | /*isStmtExpr=*/false); | ||||
14859 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14859, __extension__ __PRETTY_FUNCTION__)); | ||||
14860 | } | ||||
14861 | MoveAssignOperator->setBody(Body.getAs<Stmt>()); | ||||
14862 | MoveAssignOperator->markUsed(Context); | ||||
14863 | |||||
14864 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
14865 | L->CompletedImplicitDefinition(MoveAssignOperator); | ||||
14866 | } | ||||
14867 | } | ||||
14868 | |||||
14869 | CXXConstructorDecl *Sema::DeclareImplicitCopyConstructor( | ||||
14870 | CXXRecordDecl *ClassDecl) { | ||||
14871 | // C++ [class.copy]p4: | ||||
14872 | // If the class definition does not explicitly declare a copy | ||||
14873 | // constructor, one is declared implicitly. | ||||
14874 | assert(ClassDecl->needsImplicitCopyConstructor())(static_cast <bool> (ClassDecl->needsImplicitCopyConstructor ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitCopyConstructor()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14874, __extension__ __PRETTY_FUNCTION__)); | ||||
14875 | |||||
14876 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXCopyConstructor); | ||||
14877 | if (DSM.isAlreadyBeingDeclared()) | ||||
14878 | return nullptr; | ||||
14879 | |||||
14880 | QualType ClassType = Context.getTypeDeclType(ClassDecl); | ||||
14881 | QualType ArgType = ClassType; | ||||
14882 | bool Const = ClassDecl->implicitCopyConstructorHasConstParam(); | ||||
14883 | if (Const) | ||||
14884 | ArgType = ArgType.withConst(); | ||||
14885 | |||||
14886 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||
14887 | if (AS != LangAS::Default) | ||||
14888 | ArgType = Context.getAddrSpaceQualType(ArgType, AS); | ||||
14889 | |||||
14890 | ArgType = Context.getLValueReferenceType(ArgType); | ||||
14891 | |||||
14892 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||
14893 | CXXCopyConstructor, | ||||
14894 | Const); | ||||
14895 | |||||
14896 | DeclarationName Name | ||||
14897 | = Context.DeclarationNames.getCXXConstructorName( | ||||
14898 | Context.getCanonicalType(ClassType)); | ||||
14899 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||
14900 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||
14901 | |||||
14902 | // An implicitly-declared copy constructor is an inline public | ||||
14903 | // member of its class. | ||||
14904 | CXXConstructorDecl *CopyConstructor = CXXConstructorDecl::Create( | ||||
14905 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), /*TInfo=*/nullptr, | ||||
14906 | ExplicitSpecifier(), getCurFPFeatures().isFPConstrained(), | ||||
14907 | /*isInline=*/true, | ||||
14908 | /*isImplicitlyDeclared=*/true, | ||||
14909 | Constexpr ? ConstexprSpecKind::Constexpr | ||||
14910 | : ConstexprSpecKind::Unspecified); | ||||
14911 | CopyConstructor->setAccess(AS_public); | ||||
14912 | CopyConstructor->setDefaulted(); | ||||
14913 | |||||
14914 | if (getLangOpts().CUDA) { | ||||
14915 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXCopyConstructor, | ||||
14916 | CopyConstructor, | ||||
14917 | /* ConstRHS */ Const, | ||||
14918 | /* Diagnose */ false); | ||||
14919 | } | ||||
14920 | |||||
14921 | setupImplicitSpecialMemberType(CopyConstructor, Context.VoidTy, ArgType); | ||||
14922 | |||||
14923 | // During template instantiation of special member functions we need a | ||||
14924 | // reliable TypeSourceInfo for the parameter types in order to allow functions | ||||
14925 | // to be substituted. | ||||
14926 | TypeSourceInfo *TSI = nullptr; | ||||
14927 | if (inTemplateInstantiation() && ClassDecl->isLambda()) | ||||
14928 | TSI = Context.getTrivialTypeSourceInfo(ArgType); | ||||
14929 | |||||
14930 | // Add the parameter to the constructor. | ||||
14931 | ParmVarDecl *FromParam = | ||||
14932 | ParmVarDecl::Create(Context, CopyConstructor, ClassLoc, ClassLoc, | ||||
14933 | /*IdentifierInfo=*/nullptr, ArgType, | ||||
14934 | /*TInfo=*/TSI, SC_None, nullptr); | ||||
14935 | CopyConstructor->setParams(FromParam); | ||||
14936 | |||||
14937 | CopyConstructor->setTrivial( | ||||
14938 | ClassDecl->needsOverloadResolutionForCopyConstructor() | ||||
14939 | ? SpecialMemberIsTrivial(CopyConstructor, CXXCopyConstructor) | ||||
14940 | : ClassDecl->hasTrivialCopyConstructor()); | ||||
14941 | |||||
14942 | CopyConstructor->setTrivialForCall( | ||||
14943 | ClassDecl->hasAttr<TrivialABIAttr>() || | ||||
14944 | (ClassDecl->needsOverloadResolutionForCopyConstructor() | ||||
14945 | ? SpecialMemberIsTrivial(CopyConstructor, CXXCopyConstructor, | ||||
14946 | TAH_ConsiderTrivialABI) | ||||
14947 | : ClassDecl->hasTrivialCopyConstructorForCall())); | ||||
14948 | |||||
14949 | // Note that we have declared this constructor. | ||||
14950 | ++getASTContext().NumImplicitCopyConstructorsDeclared; | ||||
14951 | |||||
14952 | Scope *S = getScopeForContext(ClassDecl); | ||||
14953 | CheckImplicitSpecialMemberDeclaration(S, CopyConstructor); | ||||
14954 | |||||
14955 | if (ShouldDeleteSpecialMember(CopyConstructor, CXXCopyConstructor)) { | ||||
14956 | ClassDecl->setImplicitCopyConstructorIsDeleted(); | ||||
14957 | SetDeclDeleted(CopyConstructor, ClassLoc); | ||||
14958 | } | ||||
14959 | |||||
14960 | if (S) | ||||
14961 | PushOnScopeChains(CopyConstructor, S, false); | ||||
14962 | ClassDecl->addDecl(CopyConstructor); | ||||
14963 | |||||
14964 | return CopyConstructor; | ||||
14965 | } | ||||
14966 | |||||
14967 | void Sema::DefineImplicitCopyConstructor(SourceLocation CurrentLocation, | ||||
14968 | CXXConstructorDecl *CopyConstructor) { | ||||
14969 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14973, __extension__ __PRETTY_FUNCTION__)) | ||||
14970 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14973, __extension__ __PRETTY_FUNCTION__)) | ||||
14971 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14973, __extension__ __PRETTY_FUNCTION__)) | ||||
14972 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14973, __extension__ __PRETTY_FUNCTION__)) | ||||
14973 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14973, __extension__ __PRETTY_FUNCTION__)); | ||||
14974 | if (CopyConstructor->willHaveBody() || CopyConstructor->isInvalidDecl()) | ||||
14975 | return; | ||||
14976 | |||||
14977 | CXXRecordDecl *ClassDecl = CopyConstructor->getParent(); | ||||
14978 | assert(ClassDecl && "DefineImplicitCopyConstructor - invalid constructor")(static_cast <bool> (ClassDecl && "DefineImplicitCopyConstructor - invalid constructor" ) ? void (0) : __assert_fail ("ClassDecl && \"DefineImplicitCopyConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 14978, __extension__ __PRETTY_FUNCTION__)); | ||||
14979 | |||||
14980 | SynthesizedFunctionScope Scope(*this, CopyConstructor); | ||||
14981 | |||||
14982 | // The exception specification is needed because we are defining the | ||||
14983 | // function. | ||||
14984 | ResolveExceptionSpec(CurrentLocation, | ||||
14985 | CopyConstructor->getType()->castAs<FunctionProtoType>()); | ||||
14986 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||
14987 | |||||
14988 | // Add a context note for diagnostics produced after this point. | ||||
14989 | Scope.addContextNote(CurrentLocation); | ||||
14990 | |||||
14991 | // C++11 [class.copy]p7: | ||||
14992 | // The [definition of an implicitly declared copy constructor] is | ||||
14993 | // deprecated if the class has a user-declared copy assignment operator | ||||
14994 | // or a user-declared destructor. | ||||
14995 | if (getLangOpts().CPlusPlus11 && CopyConstructor->isImplicit()) | ||||
14996 | diagnoseDeprecatedCopyOperation(*this, CopyConstructor); | ||||
14997 | |||||
14998 | if (SetCtorInitializers(CopyConstructor, /*AnyErrors=*/false)) { | ||||
14999 | CopyConstructor->setInvalidDecl(); | ||||
15000 | } else { | ||||
15001 | SourceLocation Loc = CopyConstructor->getEndLoc().isValid() | ||||
15002 | ? CopyConstructor->getEndLoc() | ||||
15003 | : CopyConstructor->getLocation(); | ||||
15004 | Sema::CompoundScopeRAII CompoundScope(*this); | ||||
15005 | CopyConstructor->setBody( | ||||
15006 | ActOnCompoundStmt(Loc, Loc, None, /*isStmtExpr=*/false).getAs<Stmt>()); | ||||
15007 | CopyConstructor->markUsed(Context); | ||||
15008 | } | ||||
15009 | |||||
15010 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
15011 | L->CompletedImplicitDefinition(CopyConstructor); | ||||
15012 | } | ||||
15013 | } | ||||
15014 | |||||
15015 | CXXConstructorDecl *Sema::DeclareImplicitMoveConstructor( | ||||
15016 | CXXRecordDecl *ClassDecl) { | ||||
15017 | assert(ClassDecl->needsImplicitMoveConstructor())(static_cast <bool> (ClassDecl->needsImplicitMoveConstructor ()) ? void (0) : __assert_fail ("ClassDecl->needsImplicitMoveConstructor()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15017, __extension__ __PRETTY_FUNCTION__)); | ||||
15018 | |||||
15019 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXMoveConstructor); | ||||
15020 | if (DSM.isAlreadyBeingDeclared()) | ||||
15021 | return nullptr; | ||||
15022 | |||||
15023 | QualType ClassType = Context.getTypeDeclType(ClassDecl); | ||||
15024 | |||||
15025 | QualType ArgType = ClassType; | ||||
15026 | LangAS AS = getDefaultCXXMethodAddrSpace(); | ||||
15027 | if (AS != LangAS::Default) | ||||
15028 | ArgType = Context.getAddrSpaceQualType(ClassType, AS); | ||||
15029 | ArgType = Context.getRValueReferenceType(ArgType); | ||||
15030 | |||||
15031 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||
15032 | CXXMoveConstructor, | ||||
15033 | false); | ||||
15034 | |||||
15035 | DeclarationName Name | ||||
15036 | = Context.DeclarationNames.getCXXConstructorName( | ||||
15037 | Context.getCanonicalType(ClassType)); | ||||
15038 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||
15039 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||
15040 | |||||
15041 | // C++11 [class.copy]p11: | ||||
15042 | // An implicitly-declared copy/move constructor is an inline public | ||||
15043 | // member of its class. | ||||
15044 | CXXConstructorDecl *MoveConstructor = CXXConstructorDecl::Create( | ||||
15045 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), /*TInfo=*/nullptr, | ||||
15046 | ExplicitSpecifier(), getCurFPFeatures().isFPConstrained(), | ||||
15047 | /*isInline=*/true, | ||||
15048 | /*isImplicitlyDeclared=*/true, | ||||
15049 | Constexpr ? ConstexprSpecKind::Constexpr | ||||
15050 | : ConstexprSpecKind::Unspecified); | ||||
15051 | MoveConstructor->setAccess(AS_public); | ||||
15052 | MoveConstructor->setDefaulted(); | ||||
15053 | |||||
15054 | if (getLangOpts().CUDA) { | ||||
15055 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXMoveConstructor, | ||||
15056 | MoveConstructor, | ||||
15057 | /* ConstRHS */ false, | ||||
15058 | /* Diagnose */ false); | ||||
15059 | } | ||||
15060 | |||||
15061 | setupImplicitSpecialMemberType(MoveConstructor, Context.VoidTy, ArgType); | ||||
15062 | |||||
15063 | // Add the parameter to the constructor. | ||||
15064 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, MoveConstructor, | ||||
15065 | ClassLoc, ClassLoc, | ||||
15066 | /*IdentifierInfo=*/nullptr, | ||||
15067 | ArgType, /*TInfo=*/nullptr, | ||||
15068 | SC_None, nullptr); | ||||
15069 | MoveConstructor->setParams(FromParam); | ||||
15070 | |||||
15071 | MoveConstructor->setTrivial( | ||||
15072 | ClassDecl->needsOverloadResolutionForMoveConstructor() | ||||
15073 | ? SpecialMemberIsTrivial(MoveConstructor, CXXMoveConstructor) | ||||
15074 | : ClassDecl->hasTrivialMoveConstructor()); | ||||
15075 | |||||
15076 | MoveConstructor->setTrivialForCall( | ||||
15077 | ClassDecl->hasAttr<TrivialABIAttr>() || | ||||
15078 | (ClassDecl->needsOverloadResolutionForMoveConstructor() | ||||
15079 | ? SpecialMemberIsTrivial(MoveConstructor, CXXMoveConstructor, | ||||
15080 | TAH_ConsiderTrivialABI) | ||||
15081 | : ClassDecl->hasTrivialMoveConstructorForCall())); | ||||
15082 | |||||
15083 | // Note that we have declared this constructor. | ||||
15084 | ++getASTContext().NumImplicitMoveConstructorsDeclared; | ||||
15085 | |||||
15086 | Scope *S = getScopeForContext(ClassDecl); | ||||
15087 | CheckImplicitSpecialMemberDeclaration(S, MoveConstructor); | ||||
15088 | |||||
15089 | if (ShouldDeleteSpecialMember(MoveConstructor, CXXMoveConstructor)) { | ||||
15090 | ClassDecl->setImplicitMoveConstructorIsDeleted(); | ||||
15091 | SetDeclDeleted(MoveConstructor, ClassLoc); | ||||
15092 | } | ||||
15093 | |||||
15094 | if (S) | ||||
15095 | PushOnScopeChains(MoveConstructor, S, false); | ||||
15096 | ClassDecl->addDecl(MoveConstructor); | ||||
15097 | |||||
15098 | return MoveConstructor; | ||||
15099 | } | ||||
15100 | |||||
15101 | void Sema::DefineImplicitMoveConstructor(SourceLocation CurrentLocation, | ||||
15102 | CXXConstructorDecl *MoveConstructor) { | ||||
15103 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15107, __extension__ __PRETTY_FUNCTION__)) | ||||
15104 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15107, __extension__ __PRETTY_FUNCTION__)) | ||||
15105 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15107, __extension__ __PRETTY_FUNCTION__)) | ||||
15106 | !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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15107, __extension__ __PRETTY_FUNCTION__)) | ||||
15107 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15107, __extension__ __PRETTY_FUNCTION__)); | ||||
15108 | if (MoveConstructor->willHaveBody() || MoveConstructor->isInvalidDecl()) | ||||
15109 | return; | ||||
15110 | |||||
15111 | CXXRecordDecl *ClassDecl = MoveConstructor->getParent(); | ||||
15112 | assert(ClassDecl && "DefineImplicitMoveConstructor - invalid constructor")(static_cast <bool> (ClassDecl && "DefineImplicitMoveConstructor - invalid constructor" ) ? void (0) : __assert_fail ("ClassDecl && \"DefineImplicitMoveConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15112, __extension__ __PRETTY_FUNCTION__)); | ||||
15113 | |||||
15114 | SynthesizedFunctionScope Scope(*this, MoveConstructor); | ||||
15115 | |||||
15116 | // The exception specification is needed because we are defining the | ||||
15117 | // function. | ||||
15118 | ResolveExceptionSpec(CurrentLocation, | ||||
15119 | MoveConstructor->getType()->castAs<FunctionProtoType>()); | ||||
15120 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||
15121 | |||||
15122 | // Add a context note for diagnostics produced after this point. | ||||
15123 | Scope.addContextNote(CurrentLocation); | ||||
15124 | |||||
15125 | if (SetCtorInitializers(MoveConstructor, /*AnyErrors=*/false)) { | ||||
15126 | MoveConstructor->setInvalidDecl(); | ||||
15127 | } else { | ||||
15128 | SourceLocation Loc = MoveConstructor->getEndLoc().isValid() | ||||
15129 | ? MoveConstructor->getEndLoc() | ||||
15130 | : MoveConstructor->getLocation(); | ||||
15131 | Sema::CompoundScopeRAII CompoundScope(*this); | ||||
15132 | MoveConstructor->setBody(ActOnCompoundStmt( | ||||
15133 | Loc, Loc, None, /*isStmtExpr=*/ false).getAs<Stmt>()); | ||||
15134 | MoveConstructor->markUsed(Context); | ||||
15135 | } | ||||
15136 | |||||
15137 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
15138 | L->CompletedImplicitDefinition(MoveConstructor); | ||||
15139 | } | ||||
15140 | } | ||||
15141 | |||||
15142 | bool Sema::isImplicitlyDeleted(FunctionDecl *FD) { | ||||
15143 | return FD->isDeleted() && FD->isDefaulted() && isa<CXXMethodDecl>(FD); | ||||
15144 | } | ||||
15145 | |||||
15146 | void Sema::DefineImplicitLambdaToFunctionPointerConversion( | ||||
15147 | SourceLocation CurrentLocation, | ||||
15148 | CXXConversionDecl *Conv) { | ||||
15149 | SynthesizedFunctionScope Scope(*this, Conv); | ||||
15150 | assert(!Conv->getReturnType()->isUndeducedType())(static_cast <bool> (!Conv->getReturnType()->isUndeducedType ()) ? void (0) : __assert_fail ("!Conv->getReturnType()->isUndeducedType()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15150, __extension__ __PRETTY_FUNCTION__)); | ||||
15151 | |||||
15152 | QualType ConvRT = Conv->getType()->castAs<FunctionType>()->getReturnType(); | ||||
15153 | CallingConv CC = | ||||
15154 | ConvRT->getPointeeType()->castAs<FunctionType>()->getCallConv(); | ||||
15155 | |||||
15156 | CXXRecordDecl *Lambda = Conv->getParent(); | ||||
15157 | FunctionDecl *CallOp = Lambda->getLambdaCallOperator(); | ||||
15158 | FunctionDecl *Invoker = Lambda->getLambdaStaticInvoker(CC); | ||||
15159 | |||||
15160 | if (auto *TemplateArgs = Conv->getTemplateSpecializationArgs()) { | ||||
15161 | CallOp = InstantiateFunctionDeclaration( | ||||
15162 | CallOp->getDescribedFunctionTemplate(), TemplateArgs, CurrentLocation); | ||||
15163 | if (!CallOp) | ||||
15164 | return; | ||||
15165 | |||||
15166 | Invoker = InstantiateFunctionDeclaration( | ||||
15167 | Invoker->getDescribedFunctionTemplate(), TemplateArgs, CurrentLocation); | ||||
15168 | if (!Invoker) | ||||
15169 | return; | ||||
15170 | } | ||||
15171 | |||||
15172 | if (CallOp->isInvalidDecl()) | ||||
15173 | return; | ||||
15174 | |||||
15175 | // Mark the call operator referenced (and add to pending instantiations | ||||
15176 | // if necessary). | ||||
15177 | // For both the conversion and static-invoker template specializations | ||||
15178 | // we construct their body's in this function, so no need to add them | ||||
15179 | // to the PendingInstantiations. | ||||
15180 | MarkFunctionReferenced(CurrentLocation, CallOp); | ||||
15181 | |||||
15182 | // Fill in the __invoke function with a dummy implementation. IR generation | ||||
15183 | // will fill in the actual details. Update its type in case it contained | ||||
15184 | // an 'auto'. | ||||
15185 | Invoker->markUsed(Context); | ||||
15186 | Invoker->setReferenced(); | ||||
15187 | Invoker->setType(Conv->getReturnType()->getPointeeType()); | ||||
15188 | Invoker->setBody(new (Context) CompoundStmt(Conv->getLocation())); | ||||
15189 | |||||
15190 | // Construct the body of the conversion function { return __invoke; }. | ||||
15191 | Expr *FunctionRef = BuildDeclRefExpr(Invoker, Invoker->getType(), | ||||
15192 | VK_LValue, Conv->getLocation()); | ||||
15193 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15193, __extension__ __PRETTY_FUNCTION__)); | ||||
15194 | Stmt *Return = BuildReturnStmt(Conv->getLocation(), FunctionRef).get(); | ||||
15195 | Conv->setBody(CompoundStmt::Create(Context, Return, Conv->getLocation(), | ||||
15196 | Conv->getLocation())); | ||||
15197 | Conv->markUsed(Context); | ||||
15198 | Conv->setReferenced(); | ||||
15199 | |||||
15200 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
15201 | L->CompletedImplicitDefinition(Conv); | ||||
15202 | L->CompletedImplicitDefinition(Invoker); | ||||
15203 | } | ||||
15204 | } | ||||
15205 | |||||
15206 | |||||
15207 | |||||
15208 | void Sema::DefineImplicitLambdaToBlockPointerConversion( | ||||
15209 | SourceLocation CurrentLocation, | ||||
15210 | CXXConversionDecl *Conv) | ||||
15211 | { | ||||
15212 | assert(!Conv->getParent()->isGenericLambda())(static_cast <bool> (!Conv->getParent()->isGenericLambda ()) ? void (0) : __assert_fail ("!Conv->getParent()->isGenericLambda()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15212, __extension__ __PRETTY_FUNCTION__)); | ||||
15213 | |||||
15214 | SynthesizedFunctionScope Scope(*this, Conv); | ||||
15215 | |||||
15216 | // Copy-initialize the lambda object as needed to capture it. | ||||
15217 | Expr *This = ActOnCXXThis(CurrentLocation).get(); | ||||
15218 | Expr *DerefThis =CreateBuiltinUnaryOp(CurrentLocation, UO_Deref, This).get(); | ||||
15219 | |||||
15220 | ExprResult BuildBlock = BuildBlockForLambdaConversion(CurrentLocation, | ||||
15221 | Conv->getLocation(), | ||||
15222 | Conv, DerefThis); | ||||
15223 | |||||
15224 | // If we're not under ARC, make sure we still get the _Block_copy/autorelease | ||||
15225 | // behavior. Note that only the general conversion function does this | ||||
15226 | // (since it's unusable otherwise); in the case where we inline the | ||||
15227 | // block literal, it has block literal lifetime semantics. | ||||
15228 | if (!BuildBlock.isInvalid() && !getLangOpts().ObjCAutoRefCount) | ||||
15229 | BuildBlock = ImplicitCastExpr::Create( | ||||
15230 | Context, BuildBlock.get()->getType(), CK_CopyAndAutoreleaseBlockObject, | ||||
15231 | BuildBlock.get(), nullptr, VK_PRValue, FPOptionsOverride()); | ||||
15232 | |||||
15233 | if (BuildBlock.isInvalid()) { | ||||
15234 | Diag(CurrentLocation, diag::note_lambda_to_block_conv); | ||||
15235 | Conv->setInvalidDecl(); | ||||
15236 | return; | ||||
15237 | } | ||||
15238 | |||||
15239 | // Create the return statement that returns the block from the conversion | ||||
15240 | // function. | ||||
15241 | StmtResult Return = BuildReturnStmt(Conv->getLocation(), BuildBlock.get()); | ||||
15242 | if (Return.isInvalid()) { | ||||
15243 | Diag(CurrentLocation, diag::note_lambda_to_block_conv); | ||||
15244 | Conv->setInvalidDecl(); | ||||
15245 | return; | ||||
15246 | } | ||||
15247 | |||||
15248 | // Set the body of the conversion function. | ||||
15249 | Stmt *ReturnS = Return.get(); | ||||
15250 | Conv->setBody(CompoundStmt::Create(Context, ReturnS, Conv->getLocation(), | ||||
15251 | Conv->getLocation())); | ||||
15252 | Conv->markUsed(Context); | ||||
15253 | |||||
15254 | // We're done; notify the mutation listener, if any. | ||||
15255 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||
15256 | L->CompletedImplicitDefinition(Conv); | ||||
15257 | } | ||||
15258 | } | ||||
15259 | |||||
15260 | /// Determine whether the given list arguments contains exactly one | ||||
15261 | /// "real" (non-default) argument. | ||||
15262 | static bool hasOneRealArgument(MultiExprArg Args) { | ||||
15263 | switch (Args.size()) { | ||||
15264 | case 0: | ||||
15265 | return false; | ||||
15266 | |||||
15267 | default: | ||||
15268 | if (!Args[1]->isDefaultArgument()) | ||||
15269 | return false; | ||||
15270 | |||||
15271 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
15272 | case 1: | ||||
15273 | return !Args[0]->isDefaultArgument(); | ||||
15274 | } | ||||
15275 | |||||
15276 | return false; | ||||
15277 | } | ||||
15278 | |||||
15279 | ExprResult | ||||
15280 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||
15281 | NamedDecl *FoundDecl, | ||||
15282 | CXXConstructorDecl *Constructor, | ||||
15283 | MultiExprArg ExprArgs, | ||||
15284 | bool HadMultipleCandidates, | ||||
15285 | bool IsListInitialization, | ||||
15286 | bool IsStdInitListInitialization, | ||||
15287 | bool RequiresZeroInit, | ||||
15288 | unsigned ConstructKind, | ||||
15289 | SourceRange ParenRange) { | ||||
15290 | bool Elidable = false; | ||||
15291 | |||||
15292 | // C++0x [class.copy]p34: | ||||
15293 | // When certain criteria are met, an implementation is allowed to | ||||
15294 | // omit the copy/move construction of a class object, even if the | ||||
15295 | // copy/move constructor and/or destructor for the object have | ||||
15296 | // side effects. [...] | ||||
15297 | // - when a temporary class object that has not been bound to a | ||||
15298 | // reference (12.2) would be copied/moved to a class object | ||||
15299 | // with the same cv-unqualified type, the copy/move operation | ||||
15300 | // can be omitted by constructing the temporary object | ||||
15301 | // directly into the target of the omitted copy/move | ||||
15302 | if (ConstructKind == CXXConstructExpr::CK_Complete && Constructor && | ||||
15303 | Constructor->isCopyOrMoveConstructor() && hasOneRealArgument(ExprArgs)) { | ||||
15304 | Expr *SubExpr = ExprArgs[0]; | ||||
15305 | Elidable = SubExpr->isTemporaryObject( | ||||
15306 | Context, cast<CXXRecordDecl>(FoundDecl->getDeclContext())); | ||||
15307 | } | ||||
15308 | |||||
15309 | return BuildCXXConstructExpr(ConstructLoc, DeclInitType, | ||||
15310 | FoundDecl, Constructor, | ||||
15311 | Elidable, ExprArgs, HadMultipleCandidates, | ||||
15312 | IsListInitialization, | ||||
15313 | IsStdInitListInitialization, RequiresZeroInit, | ||||
15314 | ConstructKind, ParenRange); | ||||
15315 | } | ||||
15316 | |||||
15317 | ExprResult | ||||
15318 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||
15319 | NamedDecl *FoundDecl, | ||||
15320 | CXXConstructorDecl *Constructor, | ||||
15321 | bool Elidable, | ||||
15322 | MultiExprArg ExprArgs, | ||||
15323 | bool HadMultipleCandidates, | ||||
15324 | bool IsListInitialization, | ||||
15325 | bool IsStdInitListInitialization, | ||||
15326 | bool RequiresZeroInit, | ||||
15327 | unsigned ConstructKind, | ||||
15328 | SourceRange ParenRange) { | ||||
15329 | if (auto *Shadow = dyn_cast<ConstructorUsingShadowDecl>(FoundDecl)) { | ||||
15330 | Constructor = findInheritingConstructor(ConstructLoc, Constructor, Shadow); | ||||
15331 | if (DiagnoseUseOfDecl(Constructor, ConstructLoc)) | ||||
15332 | return ExprError(); | ||||
15333 | } | ||||
15334 | |||||
15335 | return BuildCXXConstructExpr( | ||||
15336 | ConstructLoc, DeclInitType, Constructor, Elidable, ExprArgs, | ||||
15337 | HadMultipleCandidates, IsListInitialization, IsStdInitListInitialization, | ||||
15338 | RequiresZeroInit, ConstructKind, ParenRange); | ||||
15339 | } | ||||
15340 | |||||
15341 | /// BuildCXXConstructExpr - Creates a complete call to a constructor, | ||||
15342 | /// including handling of its default argument expressions. | ||||
15343 | ExprResult | ||||
15344 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||
15345 | CXXConstructorDecl *Constructor, | ||||
15346 | bool Elidable, | ||||
15347 | MultiExprArg ExprArgs, | ||||
15348 | bool HadMultipleCandidates, | ||||
15349 | bool IsListInitialization, | ||||
15350 | bool IsStdInitListInitialization, | ||||
15351 | bool RequiresZeroInit, | ||||
15352 | unsigned ConstructKind, | ||||
15353 | SourceRange ParenRange) { | ||||
15354 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15357, __extension__ __PRETTY_FUNCTION__)) | ||||
15355 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15357, __extension__ __PRETTY_FUNCTION__)) | ||||
15356 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15357, __extension__ __PRETTY_FUNCTION__)) | ||||
15357 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15357, __extension__ __PRETTY_FUNCTION__)); | ||||
15358 | MarkFunctionReferenced(ConstructLoc, Constructor); | ||||
15359 | if (getLangOpts().CUDA && !CheckCUDACall(ConstructLoc, Constructor)) | ||||
15360 | return ExprError(); | ||||
15361 | if (getLangOpts().SYCLIsDevice && | ||||
15362 | !checkSYCLDeviceFunction(ConstructLoc, Constructor)) | ||||
15363 | return ExprError(); | ||||
15364 | |||||
15365 | return CheckForImmediateInvocation( | ||||
15366 | CXXConstructExpr::Create( | ||||
15367 | Context, DeclInitType, ConstructLoc, Constructor, Elidable, ExprArgs, | ||||
15368 | HadMultipleCandidates, IsListInitialization, | ||||
15369 | IsStdInitListInitialization, RequiresZeroInit, | ||||
15370 | static_cast<CXXConstructExpr::ConstructionKind>(ConstructKind), | ||||
15371 | ParenRange), | ||||
15372 | Constructor); | ||||
15373 | } | ||||
15374 | |||||
15375 | ExprResult Sema::BuildCXXDefaultInitExpr(SourceLocation Loc, FieldDecl *Field) { | ||||
15376 | assert(Field->hasInClassInitializer())(static_cast <bool> (Field->hasInClassInitializer()) ? void (0) : __assert_fail ("Field->hasInClassInitializer()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15376, __extension__ __PRETTY_FUNCTION__)); | ||||
15377 | |||||
15378 | // If we already have the in-class initializer nothing needs to be done. | ||||
15379 | if (Field->getInClassInitializer()) | ||||
15380 | return CXXDefaultInitExpr::Create(Context, Loc, Field, CurContext); | ||||
15381 | |||||
15382 | // If we might have already tried and failed to instantiate, don't try again. | ||||
15383 | if (Field->isInvalidDecl()) | ||||
15384 | return ExprError(); | ||||
15385 | |||||
15386 | // Maybe we haven't instantiated the in-class initializer. Go check the | ||||
15387 | // pattern FieldDecl to see if it has one. | ||||
15388 | CXXRecordDecl *ParentRD = cast<CXXRecordDecl>(Field->getParent()); | ||||
15389 | |||||
15390 | if (isTemplateInstantiation(ParentRD->getTemplateSpecializationKind())) { | ||||
15391 | CXXRecordDecl *ClassPattern = ParentRD->getTemplateInstantiationPattern(); | ||||
15392 | DeclContext::lookup_result Lookup = | ||||
15393 | ClassPattern->lookup(Field->getDeclName()); | ||||
15394 | |||||
15395 | FieldDecl *Pattern = nullptr; | ||||
15396 | for (auto L : Lookup) { | ||||
15397 | if (isa<FieldDecl>(L)) { | ||||
15398 | Pattern = cast<FieldDecl>(L); | ||||
15399 | break; | ||||
15400 | } | ||||
15401 | } | ||||
15402 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15402, __extension__ __PRETTY_FUNCTION__)); | ||||
15403 | |||||
15404 | if (!Pattern->hasInClassInitializer() || | ||||
15405 | InstantiateInClassInitializer(Loc, Field, Pattern, | ||||
15406 | getTemplateInstantiationArgs(Field))) { | ||||
15407 | // Don't diagnose this again. | ||||
15408 | Field->setInvalidDecl(); | ||||
15409 | return ExprError(); | ||||
15410 | } | ||||
15411 | return CXXDefaultInitExpr::Create(Context, Loc, Field, CurContext); | ||||
15412 | } | ||||
15413 | |||||
15414 | // DR1351: | ||||
15415 | // If the brace-or-equal-initializer of a non-static data member | ||||
15416 | // invokes a defaulted default constructor of its class or of an | ||||
15417 | // enclosing class in a potentially evaluated subexpression, the | ||||
15418 | // program is ill-formed. | ||||
15419 | // | ||||
15420 | // This resolution is unworkable: the exception specification of the | ||||
15421 | // default constructor can be needed in an unevaluated context, in | ||||
15422 | // particular, in the operand of a noexcept-expression, and we can be | ||||
15423 | // unable to compute an exception specification for an enclosed class. | ||||
15424 | // | ||||
15425 | // Any attempt to resolve the exception specification of a defaulted default | ||||
15426 | // constructor before the initializer is lexically complete will ultimately | ||||
15427 | // come here at which point we can diagnose it. | ||||
15428 | RecordDecl *OutermostClass = ParentRD->getOuterLexicalRecordContext(); | ||||
15429 | Diag(Loc, diag::err_default_member_initializer_not_yet_parsed) | ||||
15430 | << OutermostClass << Field; | ||||
15431 | Diag(Field->getEndLoc(), | ||||
15432 | diag::note_default_member_initializer_not_yet_parsed); | ||||
15433 | // Recover by marking the field invalid, unless we're in a SFINAE context. | ||||
15434 | if (!isSFINAEContext()) | ||||
15435 | Field->setInvalidDecl(); | ||||
15436 | return ExprError(); | ||||
15437 | } | ||||
15438 | |||||
15439 | void Sema::FinalizeVarWithDestructor(VarDecl *VD, const RecordType *Record) { | ||||
15440 | if (VD->isInvalidDecl()) return; | ||||
15441 | // If initializing the variable failed, don't also diagnose problems with | ||||
15442 | // the desctructor, they're likely related. | ||||
15443 | if (VD->getInit() && VD->getInit()->containsErrors()) | ||||
15444 | return; | ||||
15445 | |||||
15446 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(Record->getDecl()); | ||||
15447 | if (ClassDecl->isInvalidDecl()) return; | ||||
15448 | if (ClassDecl->hasIrrelevantDestructor()) return; | ||||
15449 | if (ClassDecl->isDependentContext()) return; | ||||
15450 | |||||
15451 | if (VD->isNoDestroy(getASTContext())) | ||||
15452 | return; | ||||
15453 | |||||
15454 | CXXDestructorDecl *Destructor = LookupDestructor(ClassDecl); | ||||
15455 | |||||
15456 | // If this is an array, we'll require the destructor during initialization, so | ||||
15457 | // we can skip over this. We still want to emit exit-time destructor warnings | ||||
15458 | // though. | ||||
15459 | if (!VD->getType()->isArrayType()) { | ||||
15460 | MarkFunctionReferenced(VD->getLocation(), Destructor); | ||||
15461 | CheckDestructorAccess(VD->getLocation(), Destructor, | ||||
15462 | PDiag(diag::err_access_dtor_var) | ||||
15463 | << VD->getDeclName() << VD->getType()); | ||||
15464 | DiagnoseUseOfDecl(Destructor, VD->getLocation()); | ||||
15465 | } | ||||
15466 | |||||
15467 | if (Destructor->isTrivial()) return; | ||||
15468 | |||||
15469 | // If the destructor is constexpr, check whether the variable has constant | ||||
15470 | // destruction now. | ||||
15471 | if (Destructor->isConstexpr()) { | ||||
15472 | bool HasConstantInit = false; | ||||
15473 | if (VD->getInit() && !VD->getInit()->isValueDependent()) | ||||
15474 | HasConstantInit = VD->evaluateValue(); | ||||
15475 | SmallVector<PartialDiagnosticAt, 8> Notes; | ||||
15476 | if (!VD->evaluateDestruction(Notes) && VD->isConstexpr() && | ||||
15477 | HasConstantInit) { | ||||
15478 | Diag(VD->getLocation(), | ||||
15479 | diag::err_constexpr_var_requires_const_destruction) << VD; | ||||
15480 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) | ||||
15481 | Diag(Notes[I].first, Notes[I].second); | ||||
15482 | } | ||||
15483 | } | ||||
15484 | |||||
15485 | if (!VD->hasGlobalStorage()) return; | ||||
15486 | |||||
15487 | // Emit warning for non-trivial dtor in global scope (a real global, | ||||
15488 | // class-static, function-static). | ||||
15489 | Diag(VD->getLocation(), diag::warn_exit_time_destructor); | ||||
15490 | |||||
15491 | // TODO: this should be re-enabled for static locals by !CXAAtExit | ||||
15492 | if (!VD->isStaticLocal()) | ||||
15493 | Diag(VD->getLocation(), diag::warn_global_destructor); | ||||
15494 | } | ||||
15495 | |||||
15496 | /// Given a constructor and the set of arguments provided for the | ||||
15497 | /// constructor, convert the arguments and add any required default arguments | ||||
15498 | /// to form a proper call to this constructor. | ||||
15499 | /// | ||||
15500 | /// \returns true if an error occurred, false otherwise. | ||||
15501 | bool Sema::CompleteConstructorCall(CXXConstructorDecl *Constructor, | ||||
15502 | QualType DeclInitType, MultiExprArg ArgsPtr, | ||||
15503 | SourceLocation Loc, | ||||
15504 | SmallVectorImpl<Expr *> &ConvertedArgs, | ||||
15505 | bool AllowExplicit, | ||||
15506 | bool IsListInitialization) { | ||||
15507 | // FIXME: This duplicates a lot of code from Sema::ConvertArgumentsForCall. | ||||
15508 | unsigned NumArgs = ArgsPtr.size(); | ||||
15509 | Expr **Args = ArgsPtr.data(); | ||||
15510 | |||||
15511 | const auto *Proto = Constructor->getType()->castAs<FunctionProtoType>(); | ||||
15512 | unsigned NumParams = Proto->getNumParams(); | ||||
15513 | |||||
15514 | // If too few arguments are available, we'll fill in the rest with defaults. | ||||
15515 | if (NumArgs < NumParams) | ||||
15516 | ConvertedArgs.reserve(NumParams); | ||||
15517 | else | ||||
15518 | ConvertedArgs.reserve(NumArgs); | ||||
15519 | |||||
15520 | VariadicCallType CallType = | ||||
15521 | Proto->isVariadic() ? VariadicConstructor : VariadicDoesNotApply; | ||||
15522 | SmallVector<Expr *, 8> AllArgs; | ||||
15523 | bool Invalid = GatherArgumentsForCall(Loc, Constructor, | ||||
15524 | Proto, 0, | ||||
15525 | llvm::makeArrayRef(Args, NumArgs), | ||||
15526 | AllArgs, | ||||
15527 | CallType, AllowExplicit, | ||||
15528 | IsListInitialization); | ||||
15529 | ConvertedArgs.append(AllArgs.begin(), AllArgs.end()); | ||||
15530 | |||||
15531 | DiagnoseSentinelCalls(Constructor, Loc, AllArgs); | ||||
15532 | |||||
15533 | CheckConstructorCall(Constructor, DeclInitType, | ||||
15534 | llvm::makeArrayRef(AllArgs.data(), AllArgs.size()), | ||||
15535 | Proto, Loc); | ||||
15536 | |||||
15537 | return Invalid; | ||||
15538 | } | ||||
15539 | |||||
15540 | static inline bool | ||||
15541 | CheckOperatorNewDeleteDeclarationScope(Sema &SemaRef, | ||||
15542 | const FunctionDecl *FnDecl) { | ||||
15543 | const DeclContext *DC = FnDecl->getDeclContext()->getRedeclContext(); | ||||
15544 | if (isa<NamespaceDecl>(DC)) { | ||||
15545 | return SemaRef.Diag(FnDecl->getLocation(), | ||||
15546 | diag::err_operator_new_delete_declared_in_namespace) | ||||
15547 | << FnDecl->getDeclName(); | ||||
15548 | } | ||||
15549 | |||||
15550 | if (isa<TranslationUnitDecl>(DC) && | ||||
15551 | FnDecl->getStorageClass() == SC_Static) { | ||||
15552 | return SemaRef.Diag(FnDecl->getLocation(), | ||||
15553 | diag::err_operator_new_delete_declared_static) | ||||
15554 | << FnDecl->getDeclName(); | ||||
15555 | } | ||||
15556 | |||||
15557 | return false; | ||||
15558 | } | ||||
15559 | |||||
15560 | static CanQualType RemoveAddressSpaceFromPtr(Sema &SemaRef, | ||||
15561 | const PointerType *PtrTy) { | ||||
15562 | auto &Ctx = SemaRef.Context; | ||||
15563 | Qualifiers PtrQuals = PtrTy->getPointeeType().getQualifiers(); | ||||
15564 | PtrQuals.removeAddressSpace(); | ||||
15565 | return Ctx.getPointerType(Ctx.getCanonicalType(Ctx.getQualifiedType( | ||||
15566 | PtrTy->getPointeeType().getUnqualifiedType(), PtrQuals))); | ||||
15567 | } | ||||
15568 | |||||
15569 | static inline bool | ||||
15570 | CheckOperatorNewDeleteTypes(Sema &SemaRef, const FunctionDecl *FnDecl, | ||||
15571 | CanQualType ExpectedResultType, | ||||
15572 | CanQualType ExpectedFirstParamType, | ||||
15573 | unsigned DependentParamTypeDiag, | ||||
15574 | unsigned InvalidParamTypeDiag) { | ||||
15575 | QualType ResultType = | ||||
15576 | FnDecl->getType()->castAs<FunctionType>()->getReturnType(); | ||||
15577 | |||||
15578 | if (SemaRef.getLangOpts().OpenCLCPlusPlus) { | ||||
15579 | // The operator is valid on any address space for OpenCL. | ||||
15580 | // Drop address space from actual and expected result types. | ||||
15581 | if (const auto *PtrTy = ResultType->getAs<PointerType>()) | ||||
15582 | ResultType = RemoveAddressSpaceFromPtr(SemaRef, PtrTy); | ||||
15583 | |||||
15584 | if (auto ExpectedPtrTy = ExpectedResultType->getAs<PointerType>()) | ||||
15585 | ExpectedResultType = RemoveAddressSpaceFromPtr(SemaRef, ExpectedPtrTy); | ||||
15586 | } | ||||
15587 | |||||
15588 | // Check that the result type is what we expect. | ||||
15589 | if (SemaRef.Context.getCanonicalType(ResultType) != ExpectedResultType) { | ||||
15590 | // Reject even if the type is dependent; an operator delete function is | ||||
15591 | // required to have a non-dependent result type. | ||||
15592 | return SemaRef.Diag( | ||||
15593 | FnDecl->getLocation(), | ||||
15594 | ResultType->isDependentType() | ||||
15595 | ? diag::err_operator_new_delete_dependent_result_type | ||||
15596 | : diag::err_operator_new_delete_invalid_result_type) | ||||
15597 | << FnDecl->getDeclName() << ExpectedResultType; | ||||
15598 | } | ||||
15599 | |||||
15600 | // A function template must have at least 2 parameters. | ||||
15601 | if (FnDecl->getDescribedFunctionTemplate() && FnDecl->getNumParams() < 2) | ||||
15602 | return SemaRef.Diag(FnDecl->getLocation(), | ||||
15603 | diag::err_operator_new_delete_template_too_few_parameters) | ||||
15604 | << FnDecl->getDeclName(); | ||||
15605 | |||||
15606 | // The function decl must have at least 1 parameter. | ||||
15607 | if (FnDecl->getNumParams() == 0) | ||||
15608 | return SemaRef.Diag(FnDecl->getLocation(), | ||||
15609 | diag::err_operator_new_delete_too_few_parameters) | ||||
15610 | << FnDecl->getDeclName(); | ||||
15611 | |||||
15612 | QualType FirstParamType = FnDecl->getParamDecl(0)->getType(); | ||||
15613 | if (SemaRef.getLangOpts().OpenCLCPlusPlus) { | ||||
15614 | // The operator is valid on any address space for OpenCL. | ||||
15615 | // Drop address space from actual and expected first parameter types. | ||||
15616 | if (const auto *PtrTy = | ||||
15617 | FnDecl->getParamDecl(0)->getType()->getAs<PointerType>()) | ||||
15618 | FirstParamType = RemoveAddressSpaceFromPtr(SemaRef, PtrTy); | ||||
15619 | |||||
15620 | if (auto ExpectedPtrTy = ExpectedFirstParamType->getAs<PointerType>()) | ||||
15621 | ExpectedFirstParamType = | ||||
15622 | RemoveAddressSpaceFromPtr(SemaRef, ExpectedPtrTy); | ||||
15623 | } | ||||
15624 | |||||
15625 | // Check that the first parameter type is what we expect. | ||||
15626 | if (SemaRef.Context.getCanonicalType(FirstParamType).getUnqualifiedType() != | ||||
15627 | ExpectedFirstParamType) { | ||||
15628 | // The first parameter type is not allowed to be dependent. As a tentative | ||||
15629 | // DR resolution, we allow a dependent parameter type if it is the right | ||||
15630 | // type anyway, to allow destroying operator delete in class templates. | ||||
15631 | return SemaRef.Diag(FnDecl->getLocation(), FirstParamType->isDependentType() | ||||
15632 | ? DependentParamTypeDiag | ||||
15633 | : InvalidParamTypeDiag) | ||||
15634 | << FnDecl->getDeclName() << ExpectedFirstParamType; | ||||
15635 | } | ||||
15636 | |||||
15637 | return false; | ||||
15638 | } | ||||
15639 | |||||
15640 | static bool | ||||
15641 | CheckOperatorNewDeclaration(Sema &SemaRef, const FunctionDecl *FnDecl) { | ||||
15642 | // C++ [basic.stc.dynamic.allocation]p1: | ||||
15643 | // A program is ill-formed if an allocation function is declared in a | ||||
15644 | // namespace scope other than global scope or declared static in global | ||||
15645 | // scope. | ||||
15646 | if (CheckOperatorNewDeleteDeclarationScope(SemaRef, FnDecl)) | ||||
15647 | return true; | ||||
15648 | |||||
15649 | CanQualType SizeTy = | ||||
15650 | SemaRef.Context.getCanonicalType(SemaRef.Context.getSizeType()); | ||||
15651 | |||||
15652 | // C++ [basic.stc.dynamic.allocation]p1: | ||||
15653 | // The return type shall be void*. The first parameter shall have type | ||||
15654 | // std::size_t. | ||||
15655 | if (CheckOperatorNewDeleteTypes(SemaRef, FnDecl, SemaRef.Context.VoidPtrTy, | ||||
15656 | SizeTy, | ||||
15657 | diag::err_operator_new_dependent_param_type, | ||||
15658 | diag::err_operator_new_param_type)) | ||||
15659 | return true; | ||||
15660 | |||||
15661 | // C++ [basic.stc.dynamic.allocation]p1: | ||||
15662 | // The first parameter shall not have an associated default argument. | ||||
15663 | if (FnDecl->getParamDecl(0)->hasDefaultArg()) | ||||
15664 | return SemaRef.Diag(FnDecl->getLocation(), | ||||
15665 | diag::err_operator_new_default_arg) | ||||
15666 | << FnDecl->getDeclName() << FnDecl->getParamDecl(0)->getDefaultArgRange(); | ||||
15667 | |||||
15668 | return false; | ||||
15669 | } | ||||
15670 | |||||
15671 | static bool | ||||
15672 | CheckOperatorDeleteDeclaration(Sema &SemaRef, FunctionDecl *FnDecl) { | ||||
15673 | // C++ [basic.stc.dynamic.deallocation]p1: | ||||
15674 | // A program is ill-formed if deallocation functions are declared in a | ||||
15675 | // namespace scope other than global scope or declared static in global | ||||
15676 | // scope. | ||||
15677 | if (CheckOperatorNewDeleteDeclarationScope(SemaRef, FnDecl)) | ||||
15678 | return true; | ||||
15679 | |||||
15680 | auto *MD = dyn_cast<CXXMethodDecl>(FnDecl); | ||||
15681 | |||||
15682 | // C++ P0722: | ||||
15683 | // Within a class C, the first parameter of a destroying operator delete | ||||
15684 | // shall be of type C *. The first parameter of any other deallocation | ||||
15685 | // function shall be of type void *. | ||||
15686 | CanQualType ExpectedFirstParamType = | ||||
15687 | MD && MD->isDestroyingOperatorDelete() | ||||
15688 | ? SemaRef.Context.getCanonicalType(SemaRef.Context.getPointerType( | ||||
15689 | SemaRef.Context.getRecordType(MD->getParent()))) | ||||
15690 | : SemaRef.Context.VoidPtrTy; | ||||
15691 | |||||
15692 | // C++ [basic.stc.dynamic.deallocation]p2: | ||||
15693 | // Each deallocation function shall return void | ||||
15694 | if (CheckOperatorNewDeleteTypes( | ||||
15695 | SemaRef, FnDecl, SemaRef.Context.VoidTy, ExpectedFirstParamType, | ||||
15696 | diag::err_operator_delete_dependent_param_type, | ||||
15697 | diag::err_operator_delete_param_type)) | ||||
15698 | return true; | ||||
15699 | |||||
15700 | // C++ P0722: | ||||
15701 | // A destroying operator delete shall be a usual deallocation function. | ||||
15702 | if (MD && !MD->getParent()->isDependentContext() && | ||||
15703 | MD->isDestroyingOperatorDelete() && | ||||
15704 | !SemaRef.isUsualDeallocationFunction(MD)) { | ||||
15705 | SemaRef.Diag(MD->getLocation(), | ||||
15706 | diag::err_destroying_operator_delete_not_usual); | ||||
15707 | return true; | ||||
15708 | } | ||||
15709 | |||||
15710 | return false; | ||||
15711 | } | ||||
15712 | |||||
15713 | /// CheckOverloadedOperatorDeclaration - Check whether the declaration | ||||
15714 | /// of this overloaded operator is well-formed. If so, returns false; | ||||
15715 | /// otherwise, emits appropriate diagnostics and returns true. | ||||
15716 | bool Sema::CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl) { | ||||
15717 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15718, __extension__ __PRETTY_FUNCTION__)) | ||||
15718 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15718, __extension__ __PRETTY_FUNCTION__)); | ||||
15719 | |||||
15720 | OverloadedOperatorKind Op = FnDecl->getOverloadedOperator(); | ||||
15721 | |||||
15722 | // C++ [over.oper]p5: | ||||
15723 | // The allocation and deallocation functions, operator new, | ||||
15724 | // operator new[], operator delete and operator delete[], are | ||||
15725 | // described completely in 3.7.3. The attributes and restrictions | ||||
15726 | // found in the rest of this subclause do not apply to them unless | ||||
15727 | // explicitly stated in 3.7.3. | ||||
15728 | if (Op == OO_Delete || Op == OO_Array_Delete) | ||||
15729 | return CheckOperatorDeleteDeclaration(*this, FnDecl); | ||||
15730 | |||||
15731 | if (Op == OO_New || Op == OO_Array_New) | ||||
15732 | return CheckOperatorNewDeclaration(*this, FnDecl); | ||||
15733 | |||||
15734 | // C++ [over.oper]p6: | ||||
15735 | // An operator function shall either be a non-static member | ||||
15736 | // function or be a non-member function and have at least one | ||||
15737 | // parameter whose type is a class, a reference to a class, an | ||||
15738 | // enumeration, or a reference to an enumeration. | ||||
15739 | if (CXXMethodDecl *MethodDecl = dyn_cast<CXXMethodDecl>(FnDecl)) { | ||||
15740 | if (MethodDecl->isStatic()) | ||||
15741 | return Diag(FnDecl->getLocation(), | ||||
15742 | diag::err_operator_overload_static) << FnDecl->getDeclName(); | ||||
15743 | } else { | ||||
15744 | bool ClassOrEnumParam = false; | ||||
15745 | for (auto Param : FnDecl->parameters()) { | ||||
15746 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||
15747 | if (ParamType->isDependentType() || ParamType->isRecordType() || | ||||
15748 | ParamType->isEnumeralType()) { | ||||
15749 | ClassOrEnumParam = true; | ||||
15750 | break; | ||||
15751 | } | ||||
15752 | } | ||||
15753 | |||||
15754 | if (!ClassOrEnumParam) | ||||
15755 | return Diag(FnDecl->getLocation(), | ||||
15756 | diag::err_operator_overload_needs_class_or_enum) | ||||
15757 | << FnDecl->getDeclName(); | ||||
15758 | } | ||||
15759 | |||||
15760 | // C++ [over.oper]p8: | ||||
15761 | // An operator function cannot have default arguments (8.3.6), | ||||
15762 | // except where explicitly stated below. | ||||
15763 | // | ||||
15764 | // Only the function-call operator allows default arguments | ||||
15765 | // (C++ [over.call]p1). | ||||
15766 | if (Op != OO_Call) { | ||||
15767 | for (auto Param : FnDecl->parameters()) { | ||||
15768 | if (Param->hasDefaultArg()) | ||||
15769 | return Diag(Param->getLocation(), | ||||
15770 | diag::err_operator_overload_default_arg) | ||||
15771 | << FnDecl->getDeclName() << Param->getDefaultArgRange(); | ||||
15772 | } | ||||
15773 | } | ||||
15774 | |||||
15775 | static const bool OperatorUses[NUM_OVERLOADED_OPERATORS][3] = { | ||||
15776 | { false, false, false } | ||||
15777 | #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ | ||||
15778 | , { Unary, Binary, MemberOnly } | ||||
15779 | #include "clang/Basic/OperatorKinds.def" | ||||
15780 | }; | ||||
15781 | |||||
15782 | bool CanBeUnaryOperator = OperatorUses[Op][0]; | ||||
15783 | bool CanBeBinaryOperator = OperatorUses[Op][1]; | ||||
15784 | bool MustBeMemberOperator = OperatorUses[Op][2]; | ||||
15785 | |||||
15786 | // C++ [over.oper]p8: | ||||
15787 | // [...] Operator functions cannot have more or fewer parameters | ||||
15788 | // than the number required for the corresponding operator, as | ||||
15789 | // described in the rest of this subclause. | ||||
15790 | unsigned NumParams = FnDecl->getNumParams() | ||||
15791 | + (isa<CXXMethodDecl>(FnDecl)? 1 : 0); | ||||
15792 | if (Op != OO_Call && | ||||
15793 | ((NumParams == 1 && !CanBeUnaryOperator) || | ||||
15794 | (NumParams == 2 && !CanBeBinaryOperator) || | ||||
15795 | (NumParams < 1) || (NumParams > 2))) { | ||||
15796 | // We have the wrong number of parameters. | ||||
15797 | unsigned ErrorKind; | ||||
15798 | if (CanBeUnaryOperator && CanBeBinaryOperator) { | ||||
15799 | ErrorKind = 2; // 2 -> unary or binary. | ||||
15800 | } else if (CanBeUnaryOperator) { | ||||
15801 | ErrorKind = 0; // 0 -> unary | ||||
15802 | } else { | ||||
15803 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15804, __extension__ __PRETTY_FUNCTION__)) | ||||
15804 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 15804, __extension__ __PRETTY_FUNCTION__)); | ||||
15805 | ErrorKind = 1; // 1 -> binary | ||||
15806 | } | ||||
15807 | |||||
15808 | return Diag(FnDecl->getLocation(), diag::err_operator_overload_must_be) | ||||
15809 | << FnDecl->getDeclName() << NumParams << ErrorKind; | ||||
15810 | } | ||||
15811 | |||||
15812 | // Overloaded operators other than operator() cannot be variadic. | ||||
15813 | if (Op != OO_Call && | ||||
15814 | FnDecl->getType()->castAs<FunctionProtoType>()->isVariadic()) { | ||||
15815 | return Diag(FnDecl->getLocation(), diag::err_operator_overload_variadic) | ||||
15816 | << FnDecl->getDeclName(); | ||||
15817 | } | ||||
15818 | |||||
15819 | // Some operators must be non-static member functions. | ||||
15820 | if (MustBeMemberOperator && !isa<CXXMethodDecl>(FnDecl)) { | ||||
15821 | return Diag(FnDecl->getLocation(), | ||||
15822 | diag::err_operator_overload_must_be_member) | ||||
15823 | << FnDecl->getDeclName(); | ||||
15824 | } | ||||
15825 | |||||
15826 | // C++ [over.inc]p1: | ||||
15827 | // The user-defined function called operator++ implements the | ||||
15828 | // prefix and postfix ++ operator. If this function is a member | ||||
15829 | // function with no parameters, or a non-member function with one | ||||
15830 | // parameter of class or enumeration type, it defines the prefix | ||||
15831 | // increment operator ++ for objects of that type. If the function | ||||
15832 | // is a member function with one parameter (which shall be of type | ||||
15833 | // int) or a non-member function with two parameters (the second | ||||
15834 | // of which shall be of type int), it defines the postfix | ||||
15835 | // increment operator ++ for objects of that type. | ||||
15836 | if ((Op == OO_PlusPlus || Op == OO_MinusMinus) && NumParams == 2) { | ||||
15837 | ParmVarDecl *LastParam = FnDecl->getParamDecl(FnDecl->getNumParams() - 1); | ||||
15838 | QualType ParamType = LastParam->getType(); | ||||
15839 | |||||
15840 | if (!ParamType->isSpecificBuiltinType(BuiltinType::Int) && | ||||
15841 | !ParamType->isDependentType()) | ||||
15842 | return Diag(LastParam->getLocation(), | ||||
15843 | diag::err_operator_overload_post_incdec_must_be_int) | ||||
15844 | << LastParam->getType() << (Op == OO_MinusMinus); | ||||
15845 | } | ||||
15846 | |||||
15847 | return false; | ||||
15848 | } | ||||
15849 | |||||
15850 | static bool | ||||
15851 | checkLiteralOperatorTemplateParameterList(Sema &SemaRef, | ||||
15852 | FunctionTemplateDecl *TpDecl) { | ||||
15853 | TemplateParameterList *TemplateParams = TpDecl->getTemplateParameters(); | ||||
15854 | |||||
15855 | // Must have one or two template parameters. | ||||
15856 | if (TemplateParams->size() == 1) { | ||||
15857 | NonTypeTemplateParmDecl *PmDecl = | ||||
15858 | dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(0)); | ||||
15859 | |||||
15860 | // The template parameter must be a char parameter pack. | ||||
15861 | if (PmDecl && PmDecl->isTemplateParameterPack() && | ||||
15862 | SemaRef.Context.hasSameType(PmDecl->getType(), SemaRef.Context.CharTy)) | ||||
15863 | return false; | ||||
15864 | |||||
15865 | // C++20 [over.literal]p5: | ||||
15866 | // A string literal operator template is a literal operator template | ||||
15867 | // whose template-parameter-list comprises a single non-type | ||||
15868 | // template-parameter of class type. | ||||
15869 | // | ||||
15870 | // As a DR resolution, we also allow placeholders for deduced class | ||||
15871 | // template specializations. | ||||
15872 | if (SemaRef.getLangOpts().CPlusPlus20 && | ||||
15873 | !PmDecl->isTemplateParameterPack() && | ||||
15874 | (PmDecl->getType()->isRecordType() || | ||||
15875 | PmDecl->getType()->getAs<DeducedTemplateSpecializationType>())) | ||||
15876 | return false; | ||||
15877 | } else if (TemplateParams->size() == 2) { | ||||
15878 | TemplateTypeParmDecl *PmType = | ||||
15879 | dyn_cast<TemplateTypeParmDecl>(TemplateParams->getParam(0)); | ||||
15880 | NonTypeTemplateParmDecl *PmArgs = | ||||
15881 | dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(1)); | ||||
15882 | |||||
15883 | // The second template parameter must be a parameter pack with the | ||||
15884 | // first template parameter as its type. | ||||
15885 | if (PmType && PmArgs && !PmType->isTemplateParameterPack() && | ||||
15886 | PmArgs->isTemplateParameterPack()) { | ||||
15887 | const TemplateTypeParmType *TArgs = | ||||
15888 | PmArgs->getType()->getAs<TemplateTypeParmType>(); | ||||
15889 | if (TArgs && TArgs->getDepth() == PmType->getDepth() && | ||||
15890 | TArgs->getIndex() == PmType->getIndex()) { | ||||
15891 | if (!SemaRef.inTemplateInstantiation()) | ||||
15892 | SemaRef.Diag(TpDecl->getLocation(), | ||||
15893 | diag::ext_string_literal_operator_template); | ||||
15894 | return false; | ||||
15895 | } | ||||
15896 | } | ||||
15897 | } | ||||
15898 | |||||
15899 | SemaRef.Diag(TpDecl->getTemplateParameters()->getSourceRange().getBegin(), | ||||
15900 | diag::err_literal_operator_template) | ||||
15901 | << TpDecl->getTemplateParameters()->getSourceRange(); | ||||
15902 | return true; | ||||
15903 | } | ||||
15904 | |||||
15905 | /// CheckLiteralOperatorDeclaration - Check whether the declaration | ||||
15906 | /// of this literal operator function is well-formed. If so, returns | ||||
15907 | /// false; otherwise, emits appropriate diagnostics and returns true. | ||||
15908 | bool Sema::CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl) { | ||||
15909 | if (isa<CXXMethodDecl>(FnDecl)) { | ||||
15910 | Diag(FnDecl->getLocation(), diag::err_literal_operator_outside_namespace) | ||||
15911 | << FnDecl->getDeclName(); | ||||
15912 | return true; | ||||
15913 | } | ||||
15914 | |||||
15915 | if (FnDecl->isExternC()) { | ||||
15916 | Diag(FnDecl->getLocation(), diag::err_literal_operator_extern_c); | ||||
15917 | if (const LinkageSpecDecl *LSD = | ||||
15918 | FnDecl->getDeclContext()->getExternCContext()) | ||||
15919 | Diag(LSD->getExternLoc(), diag::note_extern_c_begins_here); | ||||
15920 | return true; | ||||
15921 | } | ||||
15922 | |||||
15923 | // This might be the definition of a literal operator template. | ||||
15924 | FunctionTemplateDecl *TpDecl = FnDecl->getDescribedFunctionTemplate(); | ||||
15925 | |||||
15926 | // This might be a specialization of a literal operator template. | ||||
15927 | if (!TpDecl) | ||||
15928 | TpDecl = FnDecl->getPrimaryTemplate(); | ||||
15929 | |||||
15930 | // template <char...> type operator "" name() and | ||||
15931 | // template <class T, T...> type operator "" name() are the only valid | ||||
15932 | // template signatures, and the only valid signatures with no parameters. | ||||
15933 | // | ||||
15934 | // C++20 also allows template <SomeClass T> type operator "" name(). | ||||
15935 | if (TpDecl) { | ||||
15936 | if (FnDecl->param_size() != 0) { | ||||
15937 | Diag(FnDecl->getLocation(), | ||||
15938 | diag::err_literal_operator_template_with_params); | ||||
15939 | return true; | ||||
15940 | } | ||||
15941 | |||||
15942 | if (checkLiteralOperatorTemplateParameterList(*this, TpDecl)) | ||||
15943 | return true; | ||||
15944 | |||||
15945 | } else if (FnDecl->param_size() == 1) { | ||||
15946 | const ParmVarDecl *Param = FnDecl->getParamDecl(0); | ||||
15947 | |||||
15948 | QualType ParamType = Param->getType().getUnqualifiedType(); | ||||
15949 | |||||
15950 | // Only unsigned long long int, long double, any character type, and const | ||||
15951 | // char * are allowed as the only parameters. | ||||
15952 | if (ParamType->isSpecificBuiltinType(BuiltinType::ULongLong) || | ||||
15953 | ParamType->isSpecificBuiltinType(BuiltinType::LongDouble) || | ||||
15954 | Context.hasSameType(ParamType, Context.CharTy) || | ||||
15955 | Context.hasSameType(ParamType, Context.WideCharTy) || | ||||
15956 | Context.hasSameType(ParamType, Context.Char8Ty) || | ||||
15957 | Context.hasSameType(ParamType, Context.Char16Ty) || | ||||
15958 | Context.hasSameType(ParamType, Context.Char32Ty)) { | ||||
15959 | } else if (const PointerType *Ptr = ParamType->getAs<PointerType>()) { | ||||
15960 | QualType InnerType = Ptr->getPointeeType(); | ||||
15961 | |||||
15962 | // Pointer parameter must be a const char *. | ||||
15963 | if (!(Context.hasSameType(InnerType.getUnqualifiedType(), | ||||
15964 | Context.CharTy) && | ||||
15965 | InnerType.isConstQualified() && !InnerType.isVolatileQualified())) { | ||||
15966 | Diag(Param->getSourceRange().getBegin(), | ||||
15967 | diag::err_literal_operator_param) | ||||
15968 | << ParamType << "'const char *'" << Param->getSourceRange(); | ||||
15969 | return true; | ||||
15970 | } | ||||
15971 | |||||
15972 | } else if (ParamType->isRealFloatingType()) { | ||||
15973 | Diag(Param->getSourceRange().getBegin(), diag::err_literal_operator_param) | ||||
15974 | << ParamType << Context.LongDoubleTy << Param->getSourceRange(); | ||||
15975 | return true; | ||||
15976 | |||||
15977 | } else if (ParamType->isIntegerType()) { | ||||
15978 | Diag(Param->getSourceRange().getBegin(), diag::err_literal_operator_param) | ||||
15979 | << ParamType << Context.UnsignedLongLongTy << Param->getSourceRange(); | ||||
15980 | return true; | ||||
15981 | |||||
15982 | } else { | ||||
15983 | Diag(Param->getSourceRange().getBegin(), | ||||
15984 | diag::err_literal_operator_invalid_param) | ||||
15985 | << ParamType << Param->getSourceRange(); | ||||
15986 | return true; | ||||
15987 | } | ||||
15988 | |||||
15989 | } else if (FnDecl->param_size() == 2) { | ||||
15990 | FunctionDecl::param_iterator Param = FnDecl->param_begin(); | ||||
15991 | |||||
15992 | // First, verify that the first parameter is correct. | ||||
15993 | |||||
15994 | QualType FirstParamType = (*Param)->getType().getUnqualifiedType(); | ||||
15995 | |||||
15996 | // Two parameter function must have a pointer to const as a | ||||
15997 | // first parameter; let's strip those qualifiers. | ||||
15998 | const PointerType *PT = FirstParamType->getAs<PointerType>(); | ||||
15999 | |||||
16000 | if (!PT) { | ||||
16001 | Diag((*Param)->getSourceRange().getBegin(), | ||||
16002 | diag::err_literal_operator_param) | ||||
16003 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||
16004 | return true; | ||||
16005 | } | ||||
16006 | |||||
16007 | QualType PointeeType = PT->getPointeeType(); | ||||
16008 | // First parameter must be const | ||||
16009 | if (!PointeeType.isConstQualified() || PointeeType.isVolatileQualified()) { | ||||
16010 | Diag((*Param)->getSourceRange().getBegin(), | ||||
16011 | diag::err_literal_operator_param) | ||||
16012 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||
16013 | return true; | ||||
16014 | } | ||||
16015 | |||||
16016 | QualType InnerType = PointeeType.getUnqualifiedType(); | ||||
16017 | // Only const char *, const wchar_t*, const char8_t*, const char16_t*, and | ||||
16018 | // const char32_t* are allowed as the first parameter to a two-parameter | ||||
16019 | // function | ||||
16020 | if (!(Context.hasSameType(InnerType, Context.CharTy) || | ||||
16021 | Context.hasSameType(InnerType, Context.WideCharTy) || | ||||
16022 | Context.hasSameType(InnerType, Context.Char8Ty) || | ||||
16023 | Context.hasSameType(InnerType, Context.Char16Ty) || | ||||
16024 | Context.hasSameType(InnerType, Context.Char32Ty))) { | ||||
16025 | Diag((*Param)->getSourceRange().getBegin(), | ||||
16026 | diag::err_literal_operator_param) | ||||
16027 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||
16028 | return true; | ||||
16029 | } | ||||
16030 | |||||
16031 | // Move on to the second and final parameter. | ||||
16032 | ++Param; | ||||
16033 | |||||
16034 | // The second parameter must be a std::size_t. | ||||
16035 | QualType SecondParamType = (*Param)->getType().getUnqualifiedType(); | ||||
16036 | if (!Context.hasSameType(SecondParamType, Context.getSizeType())) { | ||||
16037 | Diag((*Param)->getSourceRange().getBegin(), | ||||
16038 | diag::err_literal_operator_param) | ||||
16039 | << SecondParamType << Context.getSizeType() | ||||
16040 | << (*Param)->getSourceRange(); | ||||
16041 | return true; | ||||
16042 | } | ||||
16043 | } else { | ||||
16044 | Diag(FnDecl->getLocation(), diag::err_literal_operator_bad_param_count); | ||||
16045 | return true; | ||||
16046 | } | ||||
16047 | |||||
16048 | // Parameters are good. | ||||
16049 | |||||
16050 | // A parameter-declaration-clause containing a default argument is not | ||||
16051 | // equivalent to any of the permitted forms. | ||||
16052 | for (auto Param : FnDecl->parameters()) { | ||||
16053 | if (Param->hasDefaultArg()) { | ||||
16054 | Diag(Param->getDefaultArgRange().getBegin(), | ||||
16055 | diag::err_literal_operator_default_argument) | ||||
16056 | << Param->getDefaultArgRange(); | ||||
16057 | break; | ||||
16058 | } | ||||
16059 | } | ||||
16060 | |||||
16061 | StringRef LiteralName | ||||
16062 | = FnDecl->getDeclName().getCXXLiteralIdentifier()->getName(); | ||||
16063 | if (LiteralName[0] != '_' && | ||||
16064 | !getSourceManager().isInSystemHeader(FnDecl->getLocation())) { | ||||
16065 | // C++11 [usrlit.suffix]p1: | ||||
16066 | // Literal suffix identifiers that do not start with an underscore | ||||
16067 | // are reserved for future standardization. | ||||
16068 | Diag(FnDecl->getLocation(), diag::warn_user_literal_reserved) | ||||
16069 | << StringLiteralParser::isValidUDSuffix(getLangOpts(), LiteralName); | ||||
16070 | } | ||||
16071 | |||||
16072 | return false; | ||||
16073 | } | ||||
16074 | |||||
16075 | /// ActOnStartLinkageSpecification - Parsed the beginning of a C++ | ||||
16076 | /// linkage specification, including the language and (if present) | ||||
16077 | /// the '{'. ExternLoc is the location of the 'extern', Lang is the | ||||
16078 | /// language string literal. LBraceLoc, if valid, provides the location of | ||||
16079 | /// the '{' brace. Otherwise, this linkage specification does not | ||||
16080 | /// have any braces. | ||||
16081 | Decl *Sema::ActOnStartLinkageSpecification(Scope *S, SourceLocation ExternLoc, | ||||
16082 | Expr *LangStr, | ||||
16083 | SourceLocation LBraceLoc) { | ||||
16084 | StringLiteral *Lit = cast<StringLiteral>(LangStr); | ||||
16085 | if (!Lit->isAscii()) { | ||||
16086 | Diag(LangStr->getExprLoc(), diag::err_language_linkage_spec_not_ascii) | ||||
16087 | << LangStr->getSourceRange(); | ||||
16088 | return nullptr; | ||||
16089 | } | ||||
16090 | |||||
16091 | StringRef Lang = Lit->getString(); | ||||
16092 | LinkageSpecDecl::LanguageIDs Language; | ||||
16093 | if (Lang == "C") | ||||
16094 | Language = LinkageSpecDecl::lang_c; | ||||
16095 | else if (Lang == "C++") | ||||
16096 | Language = LinkageSpecDecl::lang_cxx; | ||||
16097 | else { | ||||
16098 | Diag(LangStr->getExprLoc(), diag::err_language_linkage_spec_unknown) | ||||
16099 | << LangStr->getSourceRange(); | ||||
16100 | return nullptr; | ||||
16101 | } | ||||
16102 | |||||
16103 | // FIXME: Add all the various semantics of linkage specifications | ||||
16104 | |||||
16105 | LinkageSpecDecl *D = LinkageSpecDecl::Create(Context, CurContext, ExternLoc, | ||||
16106 | LangStr->getExprLoc(), Language, | ||||
16107 | LBraceLoc.isValid()); | ||||
16108 | CurContext->addDecl(D); | ||||
16109 | PushDeclContext(S, D); | ||||
16110 | return D; | ||||
16111 | } | ||||
16112 | |||||
16113 | /// ActOnFinishLinkageSpecification - Complete the definition of | ||||
16114 | /// the C++ linkage specification LinkageSpec. If RBraceLoc is | ||||
16115 | /// valid, it's the position of the closing '}' brace in a linkage | ||||
16116 | /// specification that uses braces. | ||||
16117 | Decl *Sema::ActOnFinishLinkageSpecification(Scope *S, | ||||
16118 | Decl *LinkageSpec, | ||||
16119 | SourceLocation RBraceLoc) { | ||||
16120 | if (RBraceLoc.isValid()) { | ||||
16121 | LinkageSpecDecl* LSDecl = cast<LinkageSpecDecl>(LinkageSpec); | ||||
16122 | LSDecl->setRBraceLoc(RBraceLoc); | ||||
16123 | } | ||||
16124 | PopDeclContext(); | ||||
16125 | return LinkageSpec; | ||||
16126 | } | ||||
16127 | |||||
16128 | Decl *Sema::ActOnEmptyDeclaration(Scope *S, | ||||
16129 | const ParsedAttributesView &AttrList, | ||||
16130 | SourceLocation SemiLoc) { | ||||
16131 | Decl *ED = EmptyDecl::Create(Context, CurContext, SemiLoc); | ||||
16132 | // Attribute declarations appertain to empty declaration so we handle | ||||
16133 | // them here. | ||||
16134 | ProcessDeclAttributeList(S, ED, AttrList); | ||||
16135 | |||||
16136 | CurContext->addDecl(ED); | ||||
16137 | return ED; | ||||
16138 | } | ||||
16139 | |||||
16140 | /// Perform semantic analysis for the variable declaration that | ||||
16141 | /// occurs within a C++ catch clause, returning the newly-created | ||||
16142 | /// variable. | ||||
16143 | VarDecl *Sema::BuildExceptionDeclaration(Scope *S, | ||||
16144 | TypeSourceInfo *TInfo, | ||||
16145 | SourceLocation StartLoc, | ||||
16146 | SourceLocation Loc, | ||||
16147 | IdentifierInfo *Name) { | ||||
16148 | bool Invalid = false; | ||||
16149 | QualType ExDeclType = TInfo->getType(); | ||||
16150 | |||||
16151 | // Arrays and functions decay. | ||||
16152 | if (ExDeclType->isArrayType()) | ||||
16153 | ExDeclType = Context.getArrayDecayedType(ExDeclType); | ||||
16154 | else if (ExDeclType->isFunctionType()) | ||||
16155 | ExDeclType = Context.getPointerType(ExDeclType); | ||||
16156 | |||||
16157 | // C++ 15.3p1: The exception-declaration shall not denote an incomplete type. | ||||
16158 | // The exception-declaration shall not denote a pointer or reference to an | ||||
16159 | // incomplete type, other than [cv] void*. | ||||
16160 | // N2844 forbids rvalue references. | ||||
16161 | if (!ExDeclType->isDependentType() && ExDeclType->isRValueReferenceType()) { | ||||
16162 | Diag(Loc, diag::err_catch_rvalue_ref); | ||||
16163 | Invalid = true; | ||||
16164 | } | ||||
16165 | |||||
16166 | if (ExDeclType->isVariablyModifiedType()) { | ||||
16167 | Diag(Loc, diag::err_catch_variably_modified) << ExDeclType; | ||||
16168 | Invalid = true; | ||||
16169 | } | ||||
16170 | |||||
16171 | QualType BaseType = ExDeclType; | ||||
16172 | int Mode = 0; // 0 for direct type, 1 for pointer, 2 for reference | ||||
16173 | unsigned DK = diag::err_catch_incomplete; | ||||
16174 | if (const PointerType *Ptr = BaseType->getAs<PointerType>()) { | ||||
16175 | BaseType = Ptr->getPointeeType(); | ||||
16176 | Mode = 1; | ||||
16177 | DK = diag::err_catch_incomplete_ptr; | ||||
16178 | } else if (const ReferenceType *Ref = BaseType->getAs<ReferenceType>()) { | ||||
16179 | // For the purpose of error recovery, we treat rvalue refs like lvalue refs. | ||||
16180 | BaseType = Ref->getPointeeType(); | ||||
16181 | Mode = 2; | ||||
16182 | DK = diag::err_catch_incomplete_ref; | ||||
16183 | } | ||||
16184 | if (!Invalid && (Mode == 0 || !BaseType->isVoidType()) && | ||||
16185 | !BaseType->isDependentType() && RequireCompleteType(Loc, BaseType, DK)) | ||||
16186 | Invalid = true; | ||||
16187 | |||||
16188 | if (!Invalid && Mode != 1 && BaseType->isSizelessType()) { | ||||
16189 | Diag(Loc, diag::err_catch_sizeless) << (Mode == 2 ? 1 : 0) << BaseType; | ||||
16190 | Invalid = true; | ||||
16191 | } | ||||
16192 | |||||
16193 | if (!Invalid && !ExDeclType->isDependentType() && | ||||
16194 | RequireNonAbstractType(Loc, ExDeclType, | ||||
16195 | diag::err_abstract_type_in_decl, | ||||
16196 | AbstractVariableType)) | ||||
16197 | Invalid = true; | ||||
16198 | |||||
16199 | // Only the non-fragile NeXT runtime currently supports C++ catches | ||||
16200 | // of ObjC types, and no runtime supports catching ObjC types by value. | ||||
16201 | if (!Invalid && getLangOpts().ObjC) { | ||||
16202 | QualType T = ExDeclType; | ||||
16203 | if (const ReferenceType *RT = T->getAs<ReferenceType>()) | ||||
16204 | T = RT->getPointeeType(); | ||||
16205 | |||||
16206 | if (T->isObjCObjectType()) { | ||||
16207 | Diag(Loc, diag::err_objc_object_catch); | ||||
16208 | Invalid = true; | ||||
16209 | } else if (T->isObjCObjectPointerType()) { | ||||
16210 | // FIXME: should this be a test for macosx-fragile specifically? | ||||
16211 | if (getLangOpts().ObjCRuntime.isFragile()) | ||||
16212 | Diag(Loc, diag::warn_objc_pointer_cxx_catch_fragile); | ||||
16213 | } | ||||
16214 | } | ||||
16215 | |||||
16216 | VarDecl *ExDecl = VarDecl::Create(Context, CurContext, StartLoc, Loc, Name, | ||||
16217 | ExDeclType, TInfo, SC_None); | ||||
16218 | ExDecl->setExceptionVariable(true); | ||||
16219 | |||||
16220 | // In ARC, infer 'retaining' for variables of retainable type. | ||||
16221 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(ExDecl)) | ||||
16222 | Invalid = true; | ||||
16223 | |||||
16224 | if (!Invalid && !ExDeclType->isDependentType()) { | ||||
16225 | if (const RecordType *recordType = ExDeclType->getAs<RecordType>()) { | ||||
16226 | // Insulate this from anything else we might currently be parsing. | ||||
16227 | EnterExpressionEvaluationContext scope( | ||||
16228 | *this, ExpressionEvaluationContext::PotentiallyEvaluated); | ||||
16229 | |||||
16230 | // C++ [except.handle]p16: | ||||
16231 | // The object declared in an exception-declaration or, if the | ||||
16232 | // exception-declaration does not specify a name, a temporary (12.2) is | ||||
16233 | // copy-initialized (8.5) from the exception object. [...] | ||||
16234 | // The object is destroyed when the handler exits, after the destruction | ||||
16235 | // of any automatic objects initialized within the handler. | ||||
16236 | // | ||||
16237 | // We just pretend to initialize the object with itself, then make sure | ||||
16238 | // it can be destroyed later. | ||||
16239 | QualType initType = Context.getExceptionObjectType(ExDeclType); | ||||
16240 | |||||
16241 | InitializedEntity entity = | ||||
16242 | InitializedEntity::InitializeVariable(ExDecl); | ||||
16243 | InitializationKind initKind = | ||||
16244 | InitializationKind::CreateCopy(Loc, SourceLocation()); | ||||
16245 | |||||
16246 | Expr *opaqueValue = | ||||
16247 | new (Context) OpaqueValueExpr(Loc, initType, VK_LValue, OK_Ordinary); | ||||
16248 | InitializationSequence sequence(*this, entity, initKind, opaqueValue); | ||||
16249 | ExprResult result = sequence.Perform(*this, entity, initKind, opaqueValue); | ||||
16250 | if (result.isInvalid()) | ||||
16251 | Invalid = true; | ||||
16252 | else { | ||||
16253 | // If the constructor used was non-trivial, set this as the | ||||
16254 | // "initializer". | ||||
16255 | CXXConstructExpr *construct = result.getAs<CXXConstructExpr>(); | ||||
16256 | if (!construct->getConstructor()->isTrivial()) { | ||||
16257 | Expr *init = MaybeCreateExprWithCleanups(construct); | ||||
16258 | ExDecl->setInit(init); | ||||
16259 | } | ||||
16260 | |||||
16261 | // And make sure it's destructable. | ||||
16262 | FinalizeVarWithDestructor(ExDecl, recordType); | ||||
16263 | } | ||||
16264 | } | ||||
16265 | } | ||||
16266 | |||||
16267 | if (Invalid) | ||||
16268 | ExDecl->setInvalidDecl(); | ||||
16269 | |||||
16270 | return ExDecl; | ||||
16271 | } | ||||
16272 | |||||
16273 | /// ActOnExceptionDeclarator - Parsed the exception-declarator in a C++ catch | ||||
16274 | /// handler. | ||||
16275 | Decl *Sema::ActOnExceptionDeclarator(Scope *S, Declarator &D) { | ||||
16276 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||
16277 | bool Invalid = D.isInvalidType(); | ||||
16278 | |||||
16279 | // Check for unexpanded parameter packs. | ||||
16280 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||
16281 | UPPC_ExceptionType)) { | ||||
16282 | TInfo = Context.getTrivialTypeSourceInfo(Context.IntTy, | ||||
16283 | D.getIdentifierLoc()); | ||||
16284 | Invalid = true; | ||||
16285 | } | ||||
16286 | |||||
16287 | IdentifierInfo *II = D.getIdentifier(); | ||||
16288 | if (NamedDecl *PrevDecl = LookupSingleName(S, II, D.getIdentifierLoc(), | ||||
16289 | LookupOrdinaryName, | ||||
16290 | ForVisibleRedeclaration)) { | ||||
16291 | // The scope should be freshly made just for us. There is just no way | ||||
16292 | // it contains any previous declaration, except for function parameters in | ||||
16293 | // a function-try-block's catch statement. | ||||
16294 | assert(!S->isDeclScope(PrevDecl))(static_cast <bool> (!S->isDeclScope(PrevDecl)) ? void (0) : __assert_fail ("!S->isDeclScope(PrevDecl)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16294, __extension__ __PRETTY_FUNCTION__)); | ||||
16295 | if (isDeclInScope(PrevDecl, CurContext, S)) { | ||||
16296 | Diag(D.getIdentifierLoc(), diag::err_redefinition) | ||||
16297 | << D.getIdentifier(); | ||||
16298 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||
16299 | Invalid = true; | ||||
16300 | } else if (PrevDecl->isTemplateParameter()) | ||||
16301 | // Maybe we will complain about the shadowed template parameter. | ||||
16302 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||
16303 | } | ||||
16304 | |||||
16305 | if (D.getCXXScopeSpec().isSet() && !Invalid) { | ||||
16306 | Diag(D.getIdentifierLoc(), diag::err_qualified_catch_declarator) | ||||
16307 | << D.getCXXScopeSpec().getRange(); | ||||
16308 | Invalid = true; | ||||
16309 | } | ||||
16310 | |||||
16311 | VarDecl *ExDecl = BuildExceptionDeclaration( | ||||
16312 | S, TInfo, D.getBeginLoc(), D.getIdentifierLoc(), D.getIdentifier()); | ||||
16313 | if (Invalid) | ||||
16314 | ExDecl->setInvalidDecl(); | ||||
16315 | |||||
16316 | // Add the exception declaration into this scope. | ||||
16317 | if (II) | ||||
16318 | PushOnScopeChains(ExDecl, S); | ||||
16319 | else | ||||
16320 | CurContext->addDecl(ExDecl); | ||||
16321 | |||||
16322 | ProcessDeclAttributes(S, ExDecl, D); | ||||
16323 | return ExDecl; | ||||
16324 | } | ||||
16325 | |||||
16326 | Decl *Sema::ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, | ||||
16327 | Expr *AssertExpr, | ||||
16328 | Expr *AssertMessageExpr, | ||||
16329 | SourceLocation RParenLoc) { | ||||
16330 | StringLiteral *AssertMessage = | ||||
16331 | AssertMessageExpr ? cast<StringLiteral>(AssertMessageExpr) : nullptr; | ||||
16332 | |||||
16333 | if (DiagnoseUnexpandedParameterPack(AssertExpr, UPPC_StaticAssertExpression)) | ||||
16334 | return nullptr; | ||||
16335 | |||||
16336 | return BuildStaticAssertDeclaration(StaticAssertLoc, AssertExpr, | ||||
16337 | AssertMessage, RParenLoc, false); | ||||
16338 | } | ||||
16339 | |||||
16340 | Decl *Sema::BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc, | ||||
16341 | Expr *AssertExpr, | ||||
16342 | StringLiteral *AssertMessage, | ||||
16343 | SourceLocation RParenLoc, | ||||
16344 | bool Failed) { | ||||
16345 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16345, __extension__ __PRETTY_FUNCTION__)); | ||||
16346 | if (!AssertExpr->isTypeDependent() && !AssertExpr->isValueDependent() && | ||||
16347 | !Failed) { | ||||
16348 | // In a static_assert-declaration, the constant-expression shall be a | ||||
16349 | // constant expression that can be contextually converted to bool. | ||||
16350 | ExprResult Converted = PerformContextuallyConvertToBool(AssertExpr); | ||||
16351 | if (Converted.isInvalid()) | ||||
16352 | Failed = true; | ||||
16353 | |||||
16354 | ExprResult FullAssertExpr = | ||||
16355 | ActOnFinishFullExpr(Converted.get(), StaticAssertLoc, | ||||
16356 | /*DiscardedValue*/ false, | ||||
16357 | /*IsConstexpr*/ true); | ||||
16358 | if (FullAssertExpr.isInvalid()) | ||||
16359 | Failed = true; | ||||
16360 | else | ||||
16361 | AssertExpr = FullAssertExpr.get(); | ||||
16362 | |||||
16363 | llvm::APSInt Cond; | ||||
16364 | if (!Failed && VerifyIntegerConstantExpression( | ||||
16365 | AssertExpr, &Cond, | ||||
16366 | diag::err_static_assert_expression_is_not_constant) | ||||
16367 | .isInvalid()) | ||||
16368 | Failed = true; | ||||
16369 | |||||
16370 | if (!Failed && !Cond) { | ||||
16371 | SmallString<256> MsgBuffer; | ||||
16372 | llvm::raw_svector_ostream Msg(MsgBuffer); | ||||
16373 | if (AssertMessage) | ||||
16374 | AssertMessage->printPretty(Msg, nullptr, getPrintingPolicy()); | ||||
16375 | |||||
16376 | Expr *InnerCond = nullptr; | ||||
16377 | std::string InnerCondDescription; | ||||
16378 | std::tie(InnerCond, InnerCondDescription) = | ||||
16379 | findFailedBooleanCondition(Converted.get()); | ||||
16380 | if (InnerCond && isa<ConceptSpecializationExpr>(InnerCond)) { | ||||
16381 | // Drill down into concept specialization expressions to see why they | ||||
16382 | // weren't satisfied. | ||||
16383 | Diag(StaticAssertLoc, diag::err_static_assert_failed) | ||||
16384 | << !AssertMessage << Msg.str() << AssertExpr->getSourceRange(); | ||||
16385 | ConstraintSatisfaction Satisfaction; | ||||
16386 | if (!CheckConstraintSatisfaction(InnerCond, Satisfaction)) | ||||
16387 | DiagnoseUnsatisfiedConstraint(Satisfaction); | ||||
16388 | } else if (InnerCond && !isa<CXXBoolLiteralExpr>(InnerCond) | ||||
16389 | && !isa<IntegerLiteral>(InnerCond)) { | ||||
16390 | Diag(StaticAssertLoc, diag::err_static_assert_requirement_failed) | ||||
16391 | << InnerCondDescription << !AssertMessage | ||||
16392 | << Msg.str() << InnerCond->getSourceRange(); | ||||
16393 | } else { | ||||
16394 | Diag(StaticAssertLoc, diag::err_static_assert_failed) | ||||
16395 | << !AssertMessage << Msg.str() << AssertExpr->getSourceRange(); | ||||
16396 | } | ||||
16397 | Failed = true; | ||||
16398 | } | ||||
16399 | } else { | ||||
16400 | ExprResult FullAssertExpr = ActOnFinishFullExpr(AssertExpr, StaticAssertLoc, | ||||
16401 | /*DiscardedValue*/false, | ||||
16402 | /*IsConstexpr*/true); | ||||
16403 | if (FullAssertExpr.isInvalid()) | ||||
16404 | Failed = true; | ||||
16405 | else | ||||
16406 | AssertExpr = FullAssertExpr.get(); | ||||
16407 | } | ||||
16408 | |||||
16409 | Decl *Decl = StaticAssertDecl::Create(Context, CurContext, StaticAssertLoc, | ||||
16410 | AssertExpr, AssertMessage, RParenLoc, | ||||
16411 | Failed); | ||||
16412 | |||||
16413 | CurContext->addDecl(Decl); | ||||
16414 | return Decl; | ||||
16415 | } | ||||
16416 | |||||
16417 | /// Perform semantic analysis of the given friend type declaration. | ||||
16418 | /// | ||||
16419 | /// \returns A friend declaration that. | ||||
16420 | FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation LocStart, | ||||
16421 | SourceLocation FriendLoc, | ||||
16422 | TypeSourceInfo *TSInfo) { | ||||
16423 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16423, __extension__ __PRETTY_FUNCTION__)); | ||||
16424 | |||||
16425 | QualType T = TSInfo->getType(); | ||||
16426 | SourceRange TypeRange = TSInfo->getTypeLoc().getLocalSourceRange(); | ||||
16427 | |||||
16428 | // C++03 [class.friend]p2: | ||||
16429 | // An elaborated-type-specifier shall be used in a friend declaration | ||||
16430 | // for a class.* | ||||
16431 | // | ||||
16432 | // * The class-key of the elaborated-type-specifier is required. | ||||
16433 | if (!CodeSynthesisContexts.empty()) { | ||||
16434 | // Do not complain about the form of friend template types during any kind | ||||
16435 | // of code synthesis. For template instantiation, we will have complained | ||||
16436 | // when the template was defined. | ||||
16437 | } else { | ||||
16438 | if (!T->isElaboratedTypeSpecifier()) { | ||||
16439 | // If we evaluated the type to a record type, suggest putting | ||||
16440 | // a tag in front. | ||||
16441 | if (const RecordType *RT = T->getAs<RecordType>()) { | ||||
16442 | RecordDecl *RD = RT->getDecl(); | ||||
16443 | |||||
16444 | SmallString<16> InsertionText(" "); | ||||
16445 | InsertionText += RD->getKindName(); | ||||
16446 | |||||
16447 | Diag(TypeRange.getBegin(), | ||||
16448 | getLangOpts().CPlusPlus11 ? | ||||
16449 | diag::warn_cxx98_compat_unelaborated_friend_type : | ||||
16450 | diag::ext_unelaborated_friend_type) | ||||
16451 | << (unsigned) RD->getTagKind() | ||||
16452 | << T | ||||
16453 | << FixItHint::CreateInsertion(getLocForEndOfToken(FriendLoc), | ||||
16454 | InsertionText); | ||||
16455 | } else { | ||||
16456 | Diag(FriendLoc, | ||||
16457 | getLangOpts().CPlusPlus11 ? | ||||
16458 | diag::warn_cxx98_compat_nonclass_type_friend : | ||||
16459 | diag::ext_nonclass_type_friend) | ||||
16460 | << T | ||||
16461 | << TypeRange; | ||||
16462 | } | ||||
16463 | } else if (T->getAs<EnumType>()) { | ||||
16464 | Diag(FriendLoc, | ||||
16465 | getLangOpts().CPlusPlus11 ? | ||||
16466 | diag::warn_cxx98_compat_enum_friend : | ||||
16467 | diag::ext_enum_friend) | ||||
16468 | << T | ||||
16469 | << TypeRange; | ||||
16470 | } | ||||
16471 | |||||
16472 | // C++11 [class.friend]p3: | ||||
16473 | // A friend declaration that does not declare a function shall have one | ||||
16474 | // of the following forms: | ||||
16475 | // friend elaborated-type-specifier ; | ||||
16476 | // friend simple-type-specifier ; | ||||
16477 | // friend typename-specifier ; | ||||
16478 | if (getLangOpts().CPlusPlus11 && LocStart != FriendLoc) | ||||
16479 | Diag(FriendLoc, diag::err_friend_not_first_in_declaration) << T; | ||||
16480 | } | ||||
16481 | |||||
16482 | // If the type specifier in a friend declaration designates a (possibly | ||||
16483 | // cv-qualified) class type, that class is declared as a friend; otherwise, | ||||
16484 | // the friend declaration is ignored. | ||||
16485 | return FriendDecl::Create(Context, CurContext, | ||||
16486 | TSInfo->getTypeLoc().getBeginLoc(), TSInfo, | ||||
16487 | FriendLoc); | ||||
16488 | } | ||||
16489 | |||||
16490 | /// Handle a friend tag declaration where the scope specifier was | ||||
16491 | /// templated. | ||||
16492 | Decl *Sema::ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, | ||||
16493 | unsigned TagSpec, SourceLocation TagLoc, | ||||
16494 | CXXScopeSpec &SS, IdentifierInfo *Name, | ||||
16495 | SourceLocation NameLoc, | ||||
16496 | const ParsedAttributesView &Attr, | ||||
16497 | MultiTemplateParamsArg TempParamLists) { | ||||
16498 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | ||||
16499 | |||||
16500 | bool IsMemberSpecialization = false; | ||||
16501 | bool Invalid = false; | ||||
16502 | |||||
16503 | if (TemplateParameterList *TemplateParams = | ||||
16504 | MatchTemplateParametersToScopeSpecifier( | ||||
16505 | TagLoc, NameLoc, SS, nullptr, TempParamLists, /*friend*/ true, | ||||
16506 | IsMemberSpecialization, Invalid)) { | ||||
16507 | if (TemplateParams->size() > 0) { | ||||
16508 | // This is a declaration of a class template. | ||||
16509 | if (Invalid) | ||||
16510 | return nullptr; | ||||
16511 | |||||
16512 | return CheckClassTemplate(S, TagSpec, TUK_Friend, TagLoc, SS, Name, | ||||
16513 | NameLoc, Attr, TemplateParams, AS_public, | ||||
16514 | /*ModulePrivateLoc=*/SourceLocation(), | ||||
16515 | FriendLoc, TempParamLists.size() - 1, | ||||
16516 | TempParamLists.data()).get(); | ||||
16517 | } else { | ||||
16518 | // The "template<>" header is extraneous. | ||||
16519 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) | ||||
16520 | << TypeWithKeyword::getTagTypeKindName(Kind) << Name; | ||||
16521 | IsMemberSpecialization = true; | ||||
16522 | } | ||||
16523 | } | ||||
16524 | |||||
16525 | if (Invalid) return nullptr; | ||||
16526 | |||||
16527 | bool isAllExplicitSpecializations = true; | ||||
16528 | for (unsigned I = TempParamLists.size(); I-- > 0; ) { | ||||
16529 | if (TempParamLists[I]->size()) { | ||||
16530 | isAllExplicitSpecializations = false; | ||||
16531 | break; | ||||
16532 | } | ||||
16533 | } | ||||
16534 | |||||
16535 | // FIXME: don't ignore attributes. | ||||
16536 | |||||
16537 | // If it's explicit specializations all the way down, just forget | ||||
16538 | // about the template header and build an appropriate non-templated | ||||
16539 | // friend. TODO: for source fidelity, remember the headers. | ||||
16540 | if (isAllExplicitSpecializations) { | ||||
16541 | if (SS.isEmpty()) { | ||||
16542 | bool Owned = false; | ||||
16543 | bool IsDependent = false; | ||||
16544 | return ActOnTag(S, TagSpec, TUK_Friend, TagLoc, SS, Name, NameLoc, | ||||
16545 | Attr, AS_public, | ||||
16546 | /*ModulePrivateLoc=*/SourceLocation(), | ||||
16547 | MultiTemplateParamsArg(), Owned, IsDependent, | ||||
16548 | /*ScopedEnumKWLoc=*/SourceLocation(), | ||||
16549 | /*ScopedEnumUsesClassTag=*/false, | ||||
16550 | /*UnderlyingType=*/TypeResult(), | ||||
16551 | /*IsTypeSpecifier=*/false, | ||||
16552 | /*IsTemplateParamOrArg=*/false); | ||||
16553 | } | ||||
16554 | |||||
16555 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | ||||
16556 | ElaboratedTypeKeyword Keyword | ||||
16557 | = TypeWithKeyword::getKeywordForTagTypeKind(Kind); | ||||
16558 | QualType T = CheckTypenameType(Keyword, TagLoc, QualifierLoc, | ||||
16559 | *Name, NameLoc); | ||||
16560 | if (T.isNull()) | ||||
16561 | return nullptr; | ||||
16562 | |||||
16563 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); | ||||
16564 | if (isa<DependentNameType>(T)) { | ||||
16565 | DependentNameTypeLoc TL = | ||||
16566 | TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||
16567 | TL.setElaboratedKeywordLoc(TagLoc); | ||||
16568 | TL.setQualifierLoc(QualifierLoc); | ||||
16569 | TL.setNameLoc(NameLoc); | ||||
16570 | } else { | ||||
16571 | ElaboratedTypeLoc TL = TSI->getTypeLoc().castAs<ElaboratedTypeLoc>(); | ||||
16572 | TL.setElaboratedKeywordLoc(TagLoc); | ||||
16573 | TL.setQualifierLoc(QualifierLoc); | ||||
16574 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(NameLoc); | ||||
16575 | } | ||||
16576 | |||||
16577 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, NameLoc, | ||||
16578 | TSI, FriendLoc, TempParamLists); | ||||
16579 | Friend->setAccess(AS_public); | ||||
16580 | CurContext->addDecl(Friend); | ||||
16581 | return Friend; | ||||
16582 | } | ||||
16583 | |||||
16584 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16584, __extension__ __PRETTY_FUNCTION__)); | ||||
16585 | |||||
16586 | |||||
16587 | |||||
16588 | // Handle the case of a templated-scope friend class. e.g. | ||||
16589 | // template <class T> class A<T>::B; | ||||
16590 | // FIXME: we don't support these right now. | ||||
16591 | Diag(NameLoc, diag::warn_template_qualified_friend_unsupported) | ||||
16592 | << SS.getScopeRep() << SS.getRange() << cast<CXXRecordDecl>(CurContext); | ||||
16593 | ElaboratedTypeKeyword ETK = TypeWithKeyword::getKeywordForTagTypeKind(Kind); | ||||
16594 | QualType T = Context.getDependentNameType(ETK, SS.getScopeRep(), Name); | ||||
16595 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); | ||||
16596 | DependentNameTypeLoc TL = TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||
16597 | TL.setElaboratedKeywordLoc(TagLoc); | ||||
16598 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||
16599 | TL.setNameLoc(NameLoc); | ||||
16600 | |||||
16601 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, NameLoc, | ||||
16602 | TSI, FriendLoc, TempParamLists); | ||||
16603 | Friend->setAccess(AS_public); | ||||
16604 | Friend->setUnsupportedFriend(true); | ||||
16605 | CurContext->addDecl(Friend); | ||||
16606 | return Friend; | ||||
16607 | } | ||||
16608 | |||||
16609 | /// Handle a friend type declaration. This works in tandem with | ||||
16610 | /// ActOnTag. | ||||
16611 | /// | ||||
16612 | /// Notes on friend class templates: | ||||
16613 | /// | ||||
16614 | /// We generally treat friend class declarations as if they were | ||||
16615 | /// declaring a class. So, for example, the elaborated type specifier | ||||
16616 | /// in a friend declaration is required to obey the restrictions of a | ||||
16617 | /// class-head (i.e. no typedefs in the scope chain), template | ||||
16618 | /// parameters are required to match up with simple template-ids, &c. | ||||
16619 | /// However, unlike when declaring a template specialization, it's | ||||
16620 | /// okay to refer to a template specialization without an empty | ||||
16621 | /// template parameter declaration, e.g. | ||||
16622 | /// friend class A<T>::B<unsigned>; | ||||
16623 | /// We permit this as a special case; if there are any template | ||||
16624 | /// parameters present at all, require proper matching, i.e. | ||||
16625 | /// template <> template \<class T> friend class A<int>::B; | ||||
16626 | Decl *Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, | ||||
16627 | MultiTemplateParamsArg TempParams) { | ||||
16628 | SourceLocation Loc = DS.getBeginLoc(); | ||||
16629 | |||||
16630 | assert(DS.isFriendSpecified())(static_cast <bool> (DS.isFriendSpecified()) ? void (0) : __assert_fail ("DS.isFriendSpecified()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16630, __extension__ __PRETTY_FUNCTION__)); | ||||
16631 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16631, __extension__ __PRETTY_FUNCTION__)); | ||||
16632 | |||||
16633 | // C++ [class.friend]p3: | ||||
16634 | // A friend declaration that does not declare a function shall have one of | ||||
16635 | // the following forms: | ||||
16636 | // friend elaborated-type-specifier ; | ||||
16637 | // friend simple-type-specifier ; | ||||
16638 | // friend typename-specifier ; | ||||
16639 | // | ||||
16640 | // Any declaration with a type qualifier does not have that form. (It's | ||||
16641 | // legal to specify a qualified type as a friend, you just can't write the | ||||
16642 | // keywords.) | ||||
16643 | if (DS.getTypeQualifiers()) { | ||||
16644 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||
16645 | Diag(DS.getConstSpecLoc(), diag::err_friend_decl_spec) << "const"; | ||||
16646 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||
16647 | Diag(DS.getVolatileSpecLoc(), diag::err_friend_decl_spec) << "volatile"; | ||||
16648 | if (DS.getTypeQualifiers() & DeclSpec::TQ_restrict) | ||||
16649 | Diag(DS.getRestrictSpecLoc(), diag::err_friend_decl_spec) << "restrict"; | ||||
16650 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||
16651 | Diag(DS.getAtomicSpecLoc(), diag::err_friend_decl_spec) << "_Atomic"; | ||||
16652 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||
16653 | Diag(DS.getUnalignedSpecLoc(), diag::err_friend_decl_spec) << "__unaligned"; | ||||
16654 | } | ||||
16655 | |||||
16656 | // Try to convert the decl specifier to a type. This works for | ||||
16657 | // friend templates because ActOnTag never produces a ClassTemplateDecl | ||||
16658 | // for a TUK_Friend. | ||||
16659 | Declarator TheDeclarator(DS, DeclaratorContext::Member); | ||||
16660 | TypeSourceInfo *TSI = GetTypeForDeclarator(TheDeclarator, S); | ||||
16661 | QualType T = TSI->getType(); | ||||
16662 | if (TheDeclarator.isInvalidType()) | ||||
16663 | return nullptr; | ||||
16664 | |||||
16665 | if (DiagnoseUnexpandedParameterPack(Loc, TSI, UPPC_FriendDeclaration)) | ||||
16666 | return nullptr; | ||||
16667 | |||||
16668 | // This is definitely an error in C++98. It's probably meant to | ||||
16669 | // be forbidden in C++0x, too, but the specification is just | ||||
16670 | // poorly written. | ||||
16671 | // | ||||
16672 | // The problem is with declarations like the following: | ||||
16673 | // template <T> friend A<T>::foo; | ||||
16674 | // where deciding whether a class C is a friend or not now hinges | ||||
16675 | // on whether there exists an instantiation of A that causes | ||||
16676 | // 'foo' to equal C. There are restrictions on class-heads | ||||
16677 | // (which we declare (by fiat) elaborated friend declarations to | ||||
16678 | // be) that makes this tractable. | ||||
16679 | // | ||||
16680 | // FIXME: handle "template <> friend class A<T>;", which | ||||
16681 | // is possibly well-formed? Who even knows? | ||||
16682 | if (TempParams.size() && !T->isElaboratedTypeSpecifier()) { | ||||
16683 | Diag(Loc, diag::err_tagless_friend_type_template) | ||||
16684 | << DS.getSourceRange(); | ||||
16685 | return nullptr; | ||||
16686 | } | ||||
16687 | |||||
16688 | // C++98 [class.friend]p1: A friend of a class is a function | ||||
16689 | // or class that is not a member of the class . . . | ||||
16690 | // This is fixed in DR77, which just barely didn't make the C++03 | ||||
16691 | // deadline. It's also a very silly restriction that seriously | ||||
16692 | // affects inner classes and which nobody else seems to implement; | ||||
16693 | // thus we never diagnose it, not even in -pedantic. | ||||
16694 | // | ||||
16695 | // But note that we could warn about it: it's always useless to | ||||
16696 | // friend one of your own members (it's not, however, worthless to | ||||
16697 | // friend a member of an arbitrary specialization of your template). | ||||
16698 | |||||
16699 | Decl *D; | ||||
16700 | if (!TempParams.empty()) | ||||
16701 | D = FriendTemplateDecl::Create(Context, CurContext, Loc, | ||||
16702 | TempParams, | ||||
16703 | TSI, | ||||
16704 | DS.getFriendSpecLoc()); | ||||
16705 | else | ||||
16706 | D = CheckFriendTypeDecl(Loc, DS.getFriendSpecLoc(), TSI); | ||||
16707 | |||||
16708 | if (!D) | ||||
16709 | return nullptr; | ||||
16710 | |||||
16711 | D->setAccess(AS_public); | ||||
16712 | CurContext->addDecl(D); | ||||
16713 | |||||
16714 | return D; | ||||
16715 | } | ||||
16716 | |||||
16717 | NamedDecl *Sema::ActOnFriendFunctionDecl(Scope *S, Declarator &D, | ||||
16718 | MultiTemplateParamsArg TemplateParams) { | ||||
16719 | const DeclSpec &DS = D.getDeclSpec(); | ||||
16720 | |||||
16721 | assert(DS.isFriendSpecified())(static_cast <bool> (DS.isFriendSpecified()) ? void (0) : __assert_fail ("DS.isFriendSpecified()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16721, __extension__ __PRETTY_FUNCTION__)); | ||||
16722 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16722, __extension__ __PRETTY_FUNCTION__)); | ||||
16723 | |||||
16724 | SourceLocation Loc = D.getIdentifierLoc(); | ||||
16725 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||
16726 | |||||
16727 | // C++ [class.friend]p1 | ||||
16728 | // A friend of a class is a function or class.... | ||||
16729 | // Note that this sees through typedefs, which is intended. | ||||
16730 | // It *doesn't* see through dependent types, which is correct | ||||
16731 | // according to [temp.arg.type]p3: | ||||
16732 | // If a declaration acquires a function type through a | ||||
16733 | // type dependent on a template-parameter and this causes | ||||
16734 | // a declaration that does not use the syntactic form of a | ||||
16735 | // function declarator to have a function type, the program | ||||
16736 | // is ill-formed. | ||||
16737 | if (!TInfo->getType()->isFunctionType()) { | ||||
16738 | Diag(Loc, diag::err_unexpected_friend); | ||||
16739 | |||||
16740 | // It might be worthwhile to try to recover by creating an | ||||
16741 | // appropriate declaration. | ||||
16742 | return nullptr; | ||||
16743 | } | ||||
16744 | |||||
16745 | // C++ [namespace.memdef]p3 | ||||
16746 | // - If a friend declaration in a non-local class first declares a | ||||
16747 | // class or function, the friend class or function is a member | ||||
16748 | // of the innermost enclosing namespace. | ||||
16749 | // - The name of the friend is not found by simple name lookup | ||||
16750 | // until a matching declaration is provided in that namespace | ||||
16751 | // scope (either before or after the class declaration granting | ||||
16752 | // friendship). | ||||
16753 | // - If a friend function is called, its name may be found by the | ||||
16754 | // name lookup that considers functions from namespaces and | ||||
16755 | // classes associated with the types of the function arguments. | ||||
16756 | // - When looking for a prior declaration of a class or a function | ||||
16757 | // declared as a friend, scopes outside the innermost enclosing | ||||
16758 | // namespace scope are not considered. | ||||
16759 | |||||
16760 | CXXScopeSpec &SS = D.getCXXScopeSpec(); | ||||
16761 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||
16762 | assert(NameInfo.getName())(static_cast <bool> (NameInfo.getName()) ? void (0) : __assert_fail ("NameInfo.getName()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16762, __extension__ __PRETTY_FUNCTION__)); | ||||
16763 | |||||
16764 | // Check for unexpanded parameter packs. | ||||
16765 | if (DiagnoseUnexpandedParameterPack(Loc, TInfo, UPPC_FriendDeclaration) || | ||||
16766 | DiagnoseUnexpandedParameterPack(NameInfo, UPPC_FriendDeclaration) || | ||||
16767 | DiagnoseUnexpandedParameterPack(SS, UPPC_FriendDeclaration)) | ||||
16768 | return nullptr; | ||||
16769 | |||||
16770 | // The context we found the declaration in, or in which we should | ||||
16771 | // create the declaration. | ||||
16772 | DeclContext *DC; | ||||
16773 | Scope *DCScope = S; | ||||
16774 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||
16775 | ForExternalRedeclaration); | ||||
16776 | |||||
16777 | // There are five cases here. | ||||
16778 | // - There's no scope specifier and we're in a local class. Only look | ||||
16779 | // for functions declared in the immediately-enclosing block scope. | ||||
16780 | // We recover from invalid scope qualifiers as if they just weren't there. | ||||
16781 | FunctionDecl *FunctionContainingLocalClass = nullptr; | ||||
16782 | if ((SS.isInvalid() || !SS.isSet()) && | ||||
16783 | (FunctionContainingLocalClass = | ||||
16784 | cast<CXXRecordDecl>(CurContext)->isLocalClass())) { | ||||
16785 | // C++11 [class.friend]p11: | ||||
16786 | // If a friend declaration appears in a local class and the name | ||||
16787 | // specified is an unqualified name, a prior declaration is | ||||
16788 | // looked up without considering scopes that are outside the | ||||
16789 | // innermost enclosing non-class scope. For a friend function | ||||
16790 | // declaration, if there is no prior declaration, the program is | ||||
16791 | // ill-formed. | ||||
16792 | |||||
16793 | // Find the innermost enclosing non-class scope. This is the block | ||||
16794 | // scope containing the local class definition (or for a nested class, | ||||
16795 | // the outer local class). | ||||
16796 | DCScope = S->getFnParent(); | ||||
16797 | |||||
16798 | // Look up the function name in the scope. | ||||
16799 | Previous.clear(LookupLocalFriendName); | ||||
16800 | LookupName(Previous, S, /*AllowBuiltinCreation*/false); | ||||
16801 | |||||
16802 | if (!Previous.empty()) { | ||||
16803 | // All possible previous declarations must have the same context: | ||||
16804 | // either they were declared at block scope or they are members of | ||||
16805 | // one of the enclosing local classes. | ||||
16806 | DC = Previous.getRepresentativeDecl()->getDeclContext(); | ||||
16807 | } else { | ||||
16808 | // This is ill-formed, but provide the context that we would have | ||||
16809 | // declared the function in, if we were permitted to, for error recovery. | ||||
16810 | DC = FunctionContainingLocalClass; | ||||
16811 | } | ||||
16812 | adjustContextForLocalExternDecl(DC); | ||||
16813 | |||||
16814 | // C++ [class.friend]p6: | ||||
16815 | // A function can be defined in a friend declaration of a class if and | ||||
16816 | // only if the class is a non-local class (9.8), the function name is | ||||
16817 | // unqualified, and the function has namespace scope. | ||||
16818 | if (D.isFunctionDefinition()) { | ||||
16819 | Diag(NameInfo.getBeginLoc(), diag::err_friend_def_in_local_class); | ||||
16820 | } | ||||
16821 | |||||
16822 | // - There's no scope specifier, in which case we just go to the | ||||
16823 | // appropriate scope and look for a function or function template | ||||
16824 | // there as appropriate. | ||||
16825 | } else if (SS.isInvalid() || !SS.isSet()) { | ||||
16826 | // C++11 [namespace.memdef]p3: | ||||
16827 | // If the name in a friend declaration is neither qualified nor | ||||
16828 | // a template-id and the declaration is a function or an | ||||
16829 | // elaborated-type-specifier, the lookup to determine whether | ||||
16830 | // the entity has been previously declared shall not consider | ||||
16831 | // any scopes outside the innermost enclosing namespace. | ||||
16832 | bool isTemplateId = | ||||
16833 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId; | ||||
16834 | |||||
16835 | // Find the appropriate context according to the above. | ||||
16836 | DC = CurContext; | ||||
16837 | |||||
16838 | // Skip class contexts. If someone can cite chapter and verse | ||||
16839 | // for this behavior, that would be nice --- it's what GCC and | ||||
16840 | // EDG do, and it seems like a reasonable intent, but the spec | ||||
16841 | // really only says that checks for unqualified existing | ||||
16842 | // declarations should stop at the nearest enclosing namespace, | ||||
16843 | // not that they should only consider the nearest enclosing | ||||
16844 | // namespace. | ||||
16845 | while (DC->isRecord()) | ||||
16846 | DC = DC->getParent(); | ||||
16847 | |||||
16848 | DeclContext *LookupDC = DC->getNonTransparentContext(); | ||||
16849 | while (true) { | ||||
16850 | LookupQualifiedName(Previous, LookupDC); | ||||
16851 | |||||
16852 | if (!Previous.empty()) { | ||||
16853 | DC = LookupDC; | ||||
16854 | break; | ||||
16855 | } | ||||
16856 | |||||
16857 | if (isTemplateId) { | ||||
16858 | if (isa<TranslationUnitDecl>(LookupDC)) break; | ||||
16859 | } else { | ||||
16860 | if (LookupDC->isFileContext()) break; | ||||
16861 | } | ||||
16862 | LookupDC = LookupDC->getParent(); | ||||
16863 | } | ||||
16864 | |||||
16865 | DCScope = getScopeForDeclContext(S, DC); | ||||
16866 | |||||
16867 | // - There's a non-dependent scope specifier, in which case we | ||||
16868 | // compute it and do a previous lookup there for a function | ||||
16869 | // or function template. | ||||
16870 | } else if (!SS.getScopeRep()->isDependent()) { | ||||
16871 | DC = computeDeclContext(SS); | ||||
16872 | if (!DC) return nullptr; | ||||
16873 | |||||
16874 | if (RequireCompleteDeclContext(SS, DC)) return nullptr; | ||||
16875 | |||||
16876 | LookupQualifiedName(Previous, DC); | ||||
16877 | |||||
16878 | // C++ [class.friend]p1: A friend of a class is a function or | ||||
16879 | // class that is not a member of the class . . . | ||||
16880 | if (DC->Equals(CurContext)) | ||||
16881 | Diag(DS.getFriendSpecLoc(), | ||||
16882 | getLangOpts().CPlusPlus11 ? | ||||
16883 | diag::warn_cxx98_compat_friend_is_member : | ||||
16884 | diag::err_friend_is_member); | ||||
16885 | |||||
16886 | if (D.isFunctionDefinition()) { | ||||
16887 | // C++ [class.friend]p6: | ||||
16888 | // A function can be defined in a friend declaration of a class if and | ||||
16889 | // only if the class is a non-local class (9.8), the function name is | ||||
16890 | // unqualified, and the function has namespace scope. | ||||
16891 | // | ||||
16892 | // FIXME: We should only do this if the scope specifier names the | ||||
16893 | // innermost enclosing namespace; otherwise the fixit changes the | ||||
16894 | // meaning of the code. | ||||
16895 | SemaDiagnosticBuilder DB | ||||
16896 | = Diag(SS.getRange().getBegin(), diag::err_qualified_friend_def); | ||||
16897 | |||||
16898 | DB << SS.getScopeRep(); | ||||
16899 | if (DC->isFileContext()) | ||||
16900 | DB << FixItHint::CreateRemoval(SS.getRange()); | ||||
16901 | SS.clear(); | ||||
16902 | } | ||||
16903 | |||||
16904 | // - There's a scope specifier that does not match any template | ||||
16905 | // parameter lists, in which case we use some arbitrary context, | ||||
16906 | // create a method or method template, and wait for instantiation. | ||||
16907 | // - There's a scope specifier that does match some template | ||||
16908 | // parameter lists, which we don't handle right now. | ||||
16909 | } else { | ||||
16910 | if (D.isFunctionDefinition()) { | ||||
16911 | // C++ [class.friend]p6: | ||||
16912 | // A function can be defined in a friend declaration of a class if and | ||||
16913 | // only if the class is a non-local class (9.8), the function name is | ||||
16914 | // unqualified, and the function has namespace scope. | ||||
16915 | Diag(SS.getRange().getBegin(), diag::err_qualified_friend_def) | ||||
16916 | << SS.getScopeRep(); | ||||
16917 | } | ||||
16918 | |||||
16919 | DC = CurContext; | ||||
16920 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16920, __extension__ __PRETTY_FUNCTION__)); | ||||
16921 | } | ||||
16922 | |||||
16923 | if (!DC->isRecord()) { | ||||
16924 | int DiagArg = -1; | ||||
16925 | switch (D.getName().getKind()) { | ||||
16926 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||
16927 | case UnqualifiedIdKind::IK_ConstructorName: | ||||
16928 | DiagArg = 0; | ||||
16929 | break; | ||||
16930 | case UnqualifiedIdKind::IK_DestructorName: | ||||
16931 | DiagArg = 1; | ||||
16932 | break; | ||||
16933 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||
16934 | DiagArg = 2; | ||||
16935 | break; | ||||
16936 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||
16937 | DiagArg = 3; | ||||
16938 | break; | ||||
16939 | case UnqualifiedIdKind::IK_Identifier: | ||||
16940 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||
16941 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||
16942 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||
16943 | case UnqualifiedIdKind::IK_TemplateId: | ||||
16944 | break; | ||||
16945 | } | ||||
16946 | // This implies that it has to be an operator or function. | ||||
16947 | if (DiagArg >= 0) { | ||||
16948 | Diag(Loc, diag::err_introducing_special_friend) << DiagArg; | ||||
16949 | return nullptr; | ||||
16950 | } | ||||
16951 | } | ||||
16952 | |||||
16953 | // FIXME: This is an egregious hack to cope with cases where the scope stack | ||||
16954 | // does not contain the declaration context, i.e., in an out-of-line | ||||
16955 | // definition of a class. | ||||
16956 | Scope FakeDCScope(S, Scope::DeclScope, Diags); | ||||
16957 | if (!DCScope) { | ||||
16958 | FakeDCScope.setEntity(DC); | ||||
16959 | DCScope = &FakeDCScope; | ||||
16960 | } | ||||
16961 | |||||
16962 | bool AddToScope = true; | ||||
16963 | NamedDecl *ND = ActOnFunctionDeclarator(DCScope, D, DC, TInfo, Previous, | ||||
16964 | TemplateParams, AddToScope); | ||||
16965 | if (!ND) return nullptr; | ||||
16966 | |||||
16967 | assert(ND->getLexicalDeclContext() == CurContext)(static_cast <bool> (ND->getLexicalDeclContext() == CurContext ) ? void (0) : __assert_fail ("ND->getLexicalDeclContext() == CurContext" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 16967, __extension__ __PRETTY_FUNCTION__)); | ||||
16968 | |||||
16969 | // If we performed typo correction, we might have added a scope specifier | ||||
16970 | // and changed the decl context. | ||||
16971 | DC = ND->getDeclContext(); | ||||
16972 | |||||
16973 | // Add the function declaration to the appropriate lookup tables, | ||||
16974 | // adjusting the redeclarations list as necessary. We don't | ||||
16975 | // want to do this yet if the friending class is dependent. | ||||
16976 | // | ||||
16977 | // Also update the scope-based lookup if the target context's | ||||
16978 | // lookup context is in lexical scope. | ||||
16979 | if (!CurContext->isDependentContext()) { | ||||
16980 | DC = DC->getRedeclContext(); | ||||
16981 | DC->makeDeclVisibleInContext(ND); | ||||
16982 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) | ||||
16983 | PushOnScopeChains(ND, EnclosingScope, /*AddToContext=*/ false); | ||||
16984 | } | ||||
16985 | |||||
16986 | FriendDecl *FrD = FriendDecl::Create(Context, CurContext, | ||||
16987 | D.getIdentifierLoc(), ND, | ||||
16988 | DS.getFriendSpecLoc()); | ||||
16989 | FrD->setAccess(AS_public); | ||||
16990 | CurContext->addDecl(FrD); | ||||
16991 | |||||
16992 | if (ND->isInvalidDecl()) { | ||||
16993 | FrD->setInvalidDecl(); | ||||
16994 | } else { | ||||
16995 | if (DC->isRecord()) CheckFriendAccess(ND); | ||||
16996 | |||||
16997 | FunctionDecl *FD; | ||||
16998 | if (FunctionTemplateDecl *FTD = dyn_cast<FunctionTemplateDecl>(ND)) | ||||
16999 | FD = FTD->getTemplatedDecl(); | ||||
17000 | else | ||||
17001 | FD = cast<FunctionDecl>(ND); | ||||
17002 | |||||
17003 | // C++11 [dcl.fct.default]p4: If a friend declaration specifies a | ||||
17004 | // default argument expression, that declaration shall be a definition | ||||
17005 | // and shall be the only declaration of the function or function | ||||
17006 | // template in the translation unit. | ||||
17007 | if (functionDeclHasDefaultArgument(FD)) { | ||||
17008 | // We can't look at FD->getPreviousDecl() because it may not have been set | ||||
17009 | // if we're in a dependent context. If the function is known to be a | ||||
17010 | // redeclaration, we will have narrowed Previous down to the right decl. | ||||
17011 | if (D.isRedeclaration()) { | ||||
17012 | Diag(FD->getLocation(), diag::err_friend_decl_with_def_arg_redeclared); | ||||
17013 | Diag(Previous.getRepresentativeDecl()->getLocation(), | ||||
17014 | diag::note_previous_declaration); | ||||
17015 | } else if (!D.isFunctionDefinition()) | ||||
17016 | Diag(FD->getLocation(), diag::err_friend_decl_with_def_arg_must_be_def); | ||||
17017 | } | ||||
17018 | |||||
17019 | // Mark templated-scope function declarations as unsupported. | ||||
17020 | if (FD->getNumTemplateParameterLists() && SS.isValid()) { | ||||
17021 | Diag(FD->getLocation(), diag::warn_template_qualified_friend_unsupported) | ||||
17022 | << SS.getScopeRep() << SS.getRange() | ||||
17023 | << cast<CXXRecordDecl>(CurContext); | ||||
17024 | FrD->setUnsupportedFriend(true); | ||||
17025 | } | ||||
17026 | } | ||||
17027 | |||||
17028 | warnOnReservedIdentifier(ND); | ||||
17029 | |||||
17030 | return ND; | ||||
17031 | } | ||||
17032 | |||||
17033 | void Sema::SetDeclDeleted(Decl *Dcl, SourceLocation DelLoc) { | ||||
17034 | AdjustDeclIfTemplate(Dcl); | ||||
17035 | |||||
17036 | FunctionDecl *Fn = dyn_cast_or_null<FunctionDecl>(Dcl); | ||||
17037 | if (!Fn) { | ||||
17038 | Diag(DelLoc, diag::err_deleted_non_function); | ||||
17039 | return; | ||||
17040 | } | ||||
17041 | |||||
17042 | // Deleted function does not have a body. | ||||
17043 | Fn->setWillHaveBody(false); | ||||
17044 | |||||
17045 | if (const FunctionDecl *Prev = Fn->getPreviousDecl()) { | ||||
17046 | // Don't consider the implicit declaration we generate for explicit | ||||
17047 | // specializations. FIXME: Do not generate these implicit declarations. | ||||
17048 | if ((Prev->getTemplateSpecializationKind() != TSK_ExplicitSpecialization || | ||||
17049 | Prev->getPreviousDecl()) && | ||||
17050 | !Prev->isDefined()) { | ||||
17051 | Diag(DelLoc, diag::err_deleted_decl_not_first); | ||||
17052 | Diag(Prev->getLocation().isInvalid() ? DelLoc : Prev->getLocation(), | ||||
17053 | Prev->isImplicit() ? diag::note_previous_implicit_declaration | ||||
17054 | : diag::note_previous_declaration); | ||||
17055 | // We can't recover from this; the declaration might have already | ||||
17056 | // been used. | ||||
17057 | Fn->setInvalidDecl(); | ||||
17058 | return; | ||||
17059 | } | ||||
17060 | |||||
17061 | // To maintain the invariant that functions are only deleted on their first | ||||
17062 | // declaration, mark the implicitly-instantiated declaration of the | ||||
17063 | // explicitly-specialized function as deleted instead of marking the | ||||
17064 | // instantiated redeclaration. | ||||
17065 | Fn = Fn->getCanonicalDecl(); | ||||
17066 | } | ||||
17067 | |||||
17068 | // dllimport/dllexport cannot be deleted. | ||||
17069 | if (const InheritableAttr *DLLAttr = getDLLAttr(Fn)) { | ||||
17070 | Diag(Fn->getLocation(), diag::err_attribute_dll_deleted) << DLLAttr; | ||||
17071 | Fn->setInvalidDecl(); | ||||
17072 | } | ||||
17073 | |||||
17074 | // C++11 [basic.start.main]p3: | ||||
17075 | // A program that defines main as deleted [...] is ill-formed. | ||||
17076 | if (Fn->isMain()) | ||||
17077 | Diag(DelLoc, diag::err_deleted_main); | ||||
17078 | |||||
17079 | // C++11 [dcl.fct.def.delete]p4: | ||||
17080 | // A deleted function is implicitly inline. | ||||
17081 | Fn->setImplicitlyInline(); | ||||
17082 | Fn->setDeletedAsWritten(); | ||||
17083 | } | ||||
17084 | |||||
17085 | void Sema::SetDeclDefaulted(Decl *Dcl, SourceLocation DefaultLoc) { | ||||
17086 | if (!Dcl || Dcl->isInvalidDecl()) | ||||
17087 | return; | ||||
17088 | |||||
17089 | auto *FD = dyn_cast<FunctionDecl>(Dcl); | ||||
17090 | if (!FD) { | ||||
17091 | if (auto *FTD = dyn_cast<FunctionTemplateDecl>(Dcl)) { | ||||
17092 | if (getDefaultedFunctionKind(FTD->getTemplatedDecl()).isComparison()) { | ||||
17093 | Diag(DefaultLoc, diag::err_defaulted_comparison_template); | ||||
17094 | return; | ||||
17095 | } | ||||
17096 | } | ||||
17097 | |||||
17098 | Diag(DefaultLoc, diag::err_default_special_members) | ||||
17099 | << getLangOpts().CPlusPlus20; | ||||
17100 | return; | ||||
17101 | } | ||||
17102 | |||||
17103 | // Reject if this can't possibly be a defaultable function. | ||||
17104 | DefaultedFunctionKind DefKind = getDefaultedFunctionKind(FD); | ||||
17105 | if (!DefKind && | ||||
17106 | // A dependent function that doesn't locally look defaultable can | ||||
17107 | // still instantiate to a defaultable function if it's a constructor | ||||
17108 | // or assignment operator. | ||||
17109 | (!FD->isDependentContext() || | ||||
17110 | (!isa<CXXConstructorDecl>(FD) && | ||||
17111 | FD->getDeclName().getCXXOverloadedOperator() != OO_Equal))) { | ||||
17112 | Diag(DefaultLoc, diag::err_default_special_members) | ||||
17113 | << getLangOpts().CPlusPlus20; | ||||
17114 | return; | ||||
17115 | } | ||||
17116 | |||||
17117 | if (DefKind.isComparison() && | ||||
17118 | !isa<CXXRecordDecl>(FD->getLexicalDeclContext())) { | ||||
17119 | Diag(FD->getLocation(), diag::err_defaulted_comparison_out_of_class) | ||||
17120 | << (int)DefKind.asComparison(); | ||||
17121 | return; | ||||
17122 | } | ||||
17123 | |||||
17124 | // Issue compatibility warning. We already warned if the operator is | ||||
17125 | // 'operator<=>' when parsing the '<=>' token. | ||||
17126 | if (DefKind.isComparison() && | ||||
17127 | DefKind.asComparison() != DefaultedComparisonKind::ThreeWay) { | ||||
17128 | Diag(DefaultLoc, getLangOpts().CPlusPlus20 | ||||
17129 | ? diag::warn_cxx17_compat_defaulted_comparison | ||||
17130 | : diag::ext_defaulted_comparison); | ||||
17131 | } | ||||
17132 | |||||
17133 | FD->setDefaulted(); | ||||
17134 | FD->setExplicitlyDefaulted(); | ||||
17135 | |||||
17136 | // Defer checking functions that are defaulted in a dependent context. | ||||
17137 | if (FD->isDependentContext()) | ||||
17138 | return; | ||||
17139 | |||||
17140 | // Unset that we will have a body for this function. We might not, | ||||
17141 | // if it turns out to be trivial, and we don't need this marking now | ||||
17142 | // that we've marked it as defaulted. | ||||
17143 | FD->setWillHaveBody(false); | ||||
17144 | |||||
17145 | // If this definition appears within the record, do the checking when | ||||
17146 | // the record is complete. This is always the case for a defaulted | ||||
17147 | // comparison. | ||||
17148 | if (DefKind.isComparison()) | ||||
17149 | return; | ||||
17150 | auto *MD = cast<CXXMethodDecl>(FD); | ||||
17151 | |||||
17152 | const FunctionDecl *Primary = FD; | ||||
17153 | if (const FunctionDecl *Pattern = FD->getTemplateInstantiationPattern()) | ||||
17154 | // Ask the template instantiation pattern that actually had the | ||||
17155 | // '= default' on it. | ||||
17156 | Primary = Pattern; | ||||
17157 | |||||
17158 | // If the method was defaulted on its first declaration, we will have | ||||
17159 | // already performed the checking in CheckCompletedCXXClass. Such a | ||||
17160 | // declaration doesn't trigger an implicit definition. | ||||
17161 | if (Primary->getCanonicalDecl()->isDefaulted()) | ||||
17162 | return; | ||||
17163 | |||||
17164 | // FIXME: Once we support defining comparisons out of class, check for a | ||||
17165 | // defaulted comparison here. | ||||
17166 | if (CheckExplicitlyDefaultedSpecialMember(MD, DefKind.asSpecialMember())) | ||||
17167 | MD->setInvalidDecl(); | ||||
17168 | else | ||||
17169 | DefineDefaultedFunction(*this, MD, DefaultLoc); | ||||
17170 | } | ||||
17171 | |||||
17172 | static void SearchForReturnInStmt(Sema &Self, Stmt *S) { | ||||
17173 | for (Stmt *SubStmt : S->children()) { | ||||
17174 | if (!SubStmt) | ||||
17175 | continue; | ||||
17176 | if (isa<ReturnStmt>(SubStmt)) | ||||
17177 | Self.Diag(SubStmt->getBeginLoc(), | ||||
17178 | diag::err_return_in_constructor_handler); | ||||
17179 | if (!isa<Expr>(SubStmt)) | ||||
17180 | SearchForReturnInStmt(Self, SubStmt); | ||||
17181 | } | ||||
17182 | } | ||||
17183 | |||||
17184 | void Sema::DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock) { | ||||
17185 | for (unsigned I = 0, E = TryBlock->getNumHandlers(); I != E; ++I) { | ||||
17186 | CXXCatchStmt *Handler = TryBlock->getHandler(I); | ||||
17187 | SearchForReturnInStmt(*this, Handler); | ||||
17188 | } | ||||
17189 | } | ||||
17190 | |||||
17191 | bool Sema::CheckOverridingFunctionAttributes(const CXXMethodDecl *New, | ||||
17192 | const CXXMethodDecl *Old) { | ||||
17193 | const auto *NewFT = New->getType()->castAs<FunctionProtoType>(); | ||||
17194 | const auto *OldFT = Old->getType()->castAs<FunctionProtoType>(); | ||||
17195 | |||||
17196 | if (OldFT->hasExtParameterInfos()) { | ||||
17197 | for (unsigned I = 0, E = OldFT->getNumParams(); I != E; ++I) | ||||
17198 | // A parameter of the overriding method should be annotated with noescape | ||||
17199 | // if the corresponding parameter of the overridden method is annotated. | ||||
17200 | if (OldFT->getExtParameterInfo(I).isNoEscape() && | ||||
17201 | !NewFT->getExtParameterInfo(I).isNoEscape()) { | ||||
17202 | Diag(New->getParamDecl(I)->getLocation(), | ||||
17203 | diag::warn_overriding_method_missing_noescape); | ||||
17204 | Diag(Old->getParamDecl(I)->getLocation(), | ||||
17205 | diag::note_overridden_marked_noescape); | ||||
17206 | } | ||||
17207 | } | ||||
17208 | |||||
17209 | // Virtual overrides must have the same code_seg. | ||||
17210 | const auto *OldCSA = Old->getAttr<CodeSegAttr>(); | ||||
17211 | const auto *NewCSA = New->getAttr<CodeSegAttr>(); | ||||
17212 | if ((NewCSA || OldCSA) && | ||||
17213 | (!OldCSA || !NewCSA || NewCSA->getName() != OldCSA->getName())) { | ||||
17214 | Diag(New->getLocation(), diag::err_mismatched_code_seg_override); | ||||
17215 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||
17216 | return true; | ||||
17217 | } | ||||
17218 | |||||
17219 | CallingConv NewCC = NewFT->getCallConv(), OldCC = OldFT->getCallConv(); | ||||
17220 | |||||
17221 | // If the calling conventions match, everything is fine | ||||
17222 | if (NewCC == OldCC) | ||||
17223 | return false; | ||||
17224 | |||||
17225 | // If the calling conventions mismatch because the new function is static, | ||||
17226 | // suppress the calling convention mismatch error; the error about static | ||||
17227 | // function override (err_static_overrides_virtual from | ||||
17228 | // Sema::CheckFunctionDeclaration) is more clear. | ||||
17229 | if (New->getStorageClass() == SC_Static) | ||||
17230 | return false; | ||||
17231 | |||||
17232 | Diag(New->getLocation(), | ||||
17233 | diag::err_conflicting_overriding_cc_attributes) | ||||
17234 | << New->getDeclName() << New->getType() << Old->getType(); | ||||
17235 | Diag(Old->getLocation(), diag::note_overridden_virtual_function); | ||||
17236 | return true; | ||||
17237 | } | ||||
17238 | |||||
17239 | bool Sema::CheckOverridingFunctionReturnType(const CXXMethodDecl *New, | ||||
17240 | const CXXMethodDecl *Old) { | ||||
17241 | QualType NewTy = New->getType()->castAs<FunctionType>()->getReturnType(); | ||||
17242 | QualType OldTy = Old->getType()->castAs<FunctionType>()->getReturnType(); | ||||
17243 | |||||
17244 | if (Context.hasSameType(NewTy, OldTy) || | ||||
17245 | NewTy->isDependentType() || OldTy->isDependentType()) | ||||
17246 | return false; | ||||
17247 | |||||
17248 | // Check if the return types are covariant | ||||
17249 | QualType NewClassTy, OldClassTy; | ||||
17250 | |||||
17251 | /// Both types must be pointers or references to classes. | ||||
17252 | if (const PointerType *NewPT = NewTy->getAs<PointerType>()) { | ||||
17253 | if (const PointerType *OldPT = OldTy->getAs<PointerType>()) { | ||||
17254 | NewClassTy = NewPT->getPointeeType(); | ||||
17255 | OldClassTy = OldPT->getPointeeType(); | ||||
17256 | } | ||||
17257 | } else if (const ReferenceType *NewRT = NewTy->getAs<ReferenceType>()) { | ||||
17258 | if (const ReferenceType *OldRT = OldTy->getAs<ReferenceType>()) { | ||||
17259 | if (NewRT->getTypeClass() == OldRT->getTypeClass()) { | ||||
17260 | NewClassTy = NewRT->getPointeeType(); | ||||
17261 | OldClassTy = OldRT->getPointeeType(); | ||||
17262 | } | ||||
17263 | } | ||||
17264 | } | ||||
17265 | |||||
17266 | // The return types aren't either both pointers or references to a class type. | ||||
17267 | if (NewClassTy.isNull()) { | ||||
17268 | Diag(New->getLocation(), | ||||
17269 | diag::err_different_return_type_for_overriding_virtual_function) | ||||
17270 | << New->getDeclName() << NewTy << OldTy | ||||
17271 | << New->getReturnTypeSourceRange(); | ||||
17272 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||
17273 | << Old->getReturnTypeSourceRange(); | ||||
17274 | |||||
17275 | return true; | ||||
17276 | } | ||||
17277 | |||||
17278 | if (!Context.hasSameUnqualifiedType(NewClassTy, OldClassTy)) { | ||||
17279 | // C++14 [class.virtual]p8: | ||||
17280 | // If the class type in the covariant return type of D::f differs from | ||||
17281 | // that of B::f, the class type in the return type of D::f shall be | ||||
17282 | // complete at the point of declaration of D::f or shall be the class | ||||
17283 | // type D. | ||||
17284 | if (const RecordType *RT = NewClassTy->getAs<RecordType>()) { | ||||
17285 | if (!RT->isBeingDefined() && | ||||
17286 | RequireCompleteType(New->getLocation(), NewClassTy, | ||||
17287 | diag::err_covariant_return_incomplete, | ||||
17288 | New->getDeclName())) | ||||
17289 | return true; | ||||
17290 | } | ||||
17291 | |||||
17292 | // Check if the new class derives from the old class. | ||||
17293 | if (!IsDerivedFrom(New->getLocation(), NewClassTy, OldClassTy)) { | ||||
17294 | Diag(New->getLocation(), diag::err_covariant_return_not_derived) | ||||
17295 | << New->getDeclName() << NewTy << OldTy | ||||
17296 | << New->getReturnTypeSourceRange(); | ||||
17297 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||
17298 | << Old->getReturnTypeSourceRange(); | ||||
17299 | return true; | ||||
17300 | } | ||||
17301 | |||||
17302 | // Check if we the conversion from derived to base is valid. | ||||
17303 | if (CheckDerivedToBaseConversion( | ||||
17304 | NewClassTy, OldClassTy, | ||||
17305 | diag::err_covariant_return_inaccessible_base, | ||||
17306 | diag::err_covariant_return_ambiguous_derived_to_base_conv, | ||||
17307 | New->getLocation(), New->getReturnTypeSourceRange(), | ||||
17308 | New->getDeclName(), nullptr)) { | ||||
17309 | // FIXME: this note won't trigger for delayed access control | ||||
17310 | // diagnostics, and it's impossible to get an undelayed error | ||||
17311 | // here from access control during the original parse because | ||||
17312 | // the ParsingDeclSpec/ParsingDeclarator are still in scope. | ||||
17313 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||
17314 | << Old->getReturnTypeSourceRange(); | ||||
17315 | return true; | ||||
17316 | } | ||||
17317 | } | ||||
17318 | |||||
17319 | // The qualifiers of the return types must be the same. | ||||
17320 | if (NewTy.getLocalCVRQualifiers() != OldTy.getLocalCVRQualifiers()) { | ||||
17321 | Diag(New->getLocation(), | ||||
17322 | diag::err_covariant_return_type_different_qualifications) | ||||
17323 | << New->getDeclName() << NewTy << OldTy | ||||
17324 | << New->getReturnTypeSourceRange(); | ||||
17325 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||
17326 | << Old->getReturnTypeSourceRange(); | ||||
17327 | return true; | ||||
17328 | } | ||||
17329 | |||||
17330 | |||||
17331 | // The new class type must have the same or less qualifiers as the old type. | ||||
17332 | if (NewClassTy.isMoreQualifiedThan(OldClassTy)) { | ||||
17333 | Diag(New->getLocation(), | ||||
17334 | diag::err_covariant_return_type_class_type_more_qualified) | ||||
17335 | << New->getDeclName() << NewTy << OldTy | ||||
17336 | << New->getReturnTypeSourceRange(); | ||||
17337 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||
17338 | << Old->getReturnTypeSourceRange(); | ||||
17339 | return true; | ||||
17340 | } | ||||
17341 | |||||
17342 | return false; | ||||
17343 | } | ||||
17344 | |||||
17345 | /// Mark the given method pure. | ||||
17346 | /// | ||||
17347 | /// \param Method the method to be marked pure. | ||||
17348 | /// | ||||
17349 | /// \param InitRange the source range that covers the "0" initializer. | ||||
17350 | bool Sema::CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange) { | ||||
17351 | SourceLocation EndLoc = InitRange.getEnd(); | ||||
17352 | if (EndLoc.isValid()) | ||||
17353 | Method->setRangeEnd(EndLoc); | ||||
17354 | |||||
17355 | if (Method->isVirtual() || Method->getParent()->isDependentContext()) { | ||||
17356 | Method->setPure(); | ||||
17357 | return false; | ||||
17358 | } | ||||
17359 | |||||
17360 | if (!Method->isInvalidDecl()) | ||||
17361 | Diag(Method->getLocation(), diag::err_non_virtual_pure) | ||||
17362 | << Method->getDeclName() << InitRange; | ||||
17363 | return true; | ||||
17364 | } | ||||
17365 | |||||
17366 | void Sema::ActOnPureSpecifier(Decl *D, SourceLocation ZeroLoc) { | ||||
17367 | if (D->getFriendObjectKind()) | ||||
17368 | Diag(D->getLocation(), diag::err_pure_friend); | ||||
17369 | else if (auto *M = dyn_cast<CXXMethodDecl>(D)) | ||||
17370 | CheckPureMethod(M, ZeroLoc); | ||||
17371 | else | ||||
17372 | Diag(D->getLocation(), diag::err_illegal_initializer); | ||||
17373 | } | ||||
17374 | |||||
17375 | /// Determine whether the given declaration is a global variable or | ||||
17376 | /// static data member. | ||||
17377 | static bool isNonlocalVariable(const Decl *D) { | ||||
17378 | if (const VarDecl *Var = dyn_cast_or_null<VarDecl>(D)) | ||||
17379 | return Var->hasGlobalStorage(); | ||||
17380 | |||||
17381 | return false; | ||||
17382 | } | ||||
17383 | |||||
17384 | /// Invoked when we are about to parse an initializer for the declaration | ||||
17385 | /// 'Dcl'. | ||||
17386 | /// | ||||
17387 | /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a | ||||
17388 | /// static data member of class X, names should be looked up in the scope of | ||||
17389 | /// class X. If the declaration had a scope specifier, a scope will have | ||||
17390 | /// been created and passed in for this purpose. Otherwise, S will be null. | ||||
17391 | void Sema::ActOnCXXEnterDeclInitializer(Scope *S, Decl *D) { | ||||
17392 | // If there is no declaration, there was an error parsing it. | ||||
17393 | if (!D || D->isInvalidDecl()) | ||||
17394 | return; | ||||
17395 | |||||
17396 | // We will always have a nested name specifier here, but this declaration | ||||
17397 | // might not be out of line if the specifier names the current namespace: | ||||
17398 | // extern int n; | ||||
17399 | // int ::n = 0; | ||||
17400 | if (S && D->isOutOfLine()) | ||||
17401 | EnterDeclaratorContext(S, D->getDeclContext()); | ||||
17402 | |||||
17403 | // If we are parsing the initializer for a static data member, push a | ||||
17404 | // new expression evaluation context that is associated with this static | ||||
17405 | // data member. | ||||
17406 | if (isNonlocalVariable(D)) | ||||
17407 | PushExpressionEvaluationContext( | ||||
17408 | ExpressionEvaluationContext::PotentiallyEvaluated, D); | ||||
17409 | } | ||||
17410 | |||||
17411 | /// Invoked after we are finished parsing an initializer for the declaration D. | ||||
17412 | void Sema::ActOnCXXExitDeclInitializer(Scope *S, Decl *D) { | ||||
17413 | // If there is no declaration, there was an error parsing it. | ||||
17414 | if (!D || D->isInvalidDecl()) | ||||
17415 | return; | ||||
17416 | |||||
17417 | if (isNonlocalVariable(D)) | ||||
17418 | PopExpressionEvaluationContext(); | ||||
17419 | |||||
17420 | if (S && D->isOutOfLine()) | ||||
17421 | ExitDeclaratorContext(S); | ||||
17422 | } | ||||
17423 | |||||
17424 | /// ActOnCXXConditionDeclarationExpr - Parsed a condition declaration of a | ||||
17425 | /// C++ if/switch/while/for statement. | ||||
17426 | /// e.g: "if (int x = f()) {...}" | ||||
17427 | DeclResult Sema::ActOnCXXConditionDeclaration(Scope *S, Declarator &D) { | ||||
17428 | // C++ 6.4p2: | ||||
17429 | // The declarator shall not specify a function or an array. | ||||
17430 | // The type-specifier-seq shall not contain typedef and shall not declare a | ||||
17431 | // new class or enumeration. | ||||
17432 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17433, __extension__ __PRETTY_FUNCTION__)) | ||||
17433 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17433, __extension__ __PRETTY_FUNCTION__)); | ||||
17434 | |||||
17435 | Decl *Dcl = ActOnDeclarator(S, D); | ||||
17436 | if (!Dcl) | ||||
17437 | return true; | ||||
17438 | |||||
17439 | if (isa<FunctionDecl>(Dcl)) { // The declarator shall not specify a function. | ||||
17440 | Diag(Dcl->getLocation(), diag::err_invalid_use_of_function_type) | ||||
17441 | << D.getSourceRange(); | ||||
17442 | return true; | ||||
17443 | } | ||||
17444 | |||||
17445 | return Dcl; | ||||
17446 | } | ||||
17447 | |||||
17448 | void Sema::LoadExternalVTableUses() { | ||||
17449 | if (!ExternalSource) | ||||
17450 | return; | ||||
17451 | |||||
17452 | SmallVector<ExternalVTableUse, 4> VTables; | ||||
17453 | ExternalSource->ReadUsedVTables(VTables); | ||||
17454 | SmallVector<VTableUse, 4> NewUses; | ||||
17455 | for (unsigned I = 0, N = VTables.size(); I != N; ++I) { | ||||
17456 | llvm::DenseMap<CXXRecordDecl *, bool>::iterator Pos | ||||
17457 | = VTablesUsed.find(VTables[I].Record); | ||||
17458 | // Even if a definition wasn't required before, it may be required now. | ||||
17459 | if (Pos != VTablesUsed.end()) { | ||||
17460 | if (!Pos->second && VTables[I].DefinitionRequired) | ||||
17461 | Pos->second = true; | ||||
17462 | continue; | ||||
17463 | } | ||||
17464 | |||||
17465 | VTablesUsed[VTables[I].Record] = VTables[I].DefinitionRequired; | ||||
17466 | NewUses.push_back(VTableUse(VTables[I].Record, VTables[I].Location)); | ||||
17467 | } | ||||
17468 | |||||
17469 | VTableUses.insert(VTableUses.begin(), NewUses.begin(), NewUses.end()); | ||||
17470 | } | ||||
17471 | |||||
17472 | void Sema::MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, | ||||
17473 | bool DefinitionRequired) { | ||||
17474 | // Ignore any vtable uses in unevaluated operands or for classes that do | ||||
17475 | // not have a vtable. | ||||
17476 | if (!Class->isDynamicClass() || Class->isDependentContext() || | ||||
17477 | CurContext->isDependentContext() || isUnevaluatedContext()) | ||||
17478 | return; | ||||
17479 | // Do not mark as used if compiling for the device outside of the target | ||||
17480 | // region. | ||||
17481 | if (TUKind != TU_Prefix && LangOpts.OpenMP && LangOpts.OpenMPIsDevice && | ||||
17482 | !isInOpenMPDeclareTargetContext() && | ||||
17483 | !isInOpenMPTargetExecutionDirective()) { | ||||
17484 | if (!DefinitionRequired) | ||||
17485 | MarkVirtualMembersReferenced(Loc, Class); | ||||
17486 | return; | ||||
17487 | } | ||||
17488 | |||||
17489 | // Try to insert this class into the map. | ||||
17490 | LoadExternalVTableUses(); | ||||
17491 | Class = Class->getCanonicalDecl(); | ||||
17492 | std::pair<llvm::DenseMap<CXXRecordDecl *, bool>::iterator, bool> | ||||
17493 | Pos = VTablesUsed.insert(std::make_pair(Class, DefinitionRequired)); | ||||
17494 | if (!Pos.second) { | ||||
17495 | // If we already had an entry, check to see if we are promoting this vtable | ||||
17496 | // to require a definition. If so, we need to reappend to the VTableUses | ||||
17497 | // list, since we may have already processed the first entry. | ||||
17498 | if (DefinitionRequired && !Pos.first->second) { | ||||
17499 | Pos.first->second = true; | ||||
17500 | } else { | ||||
17501 | // Otherwise, we can early exit. | ||||
17502 | return; | ||||
17503 | } | ||||
17504 | } else { | ||||
17505 | // The Microsoft ABI requires that we perform the destructor body | ||||
17506 | // checks (i.e. operator delete() lookup) when the vtable is marked used, as | ||||
17507 | // the deleting destructor is emitted with the vtable, not with the | ||||
17508 | // destructor definition as in the Itanium ABI. | ||||
17509 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||
17510 | CXXDestructorDecl *DD = Class->getDestructor(); | ||||
17511 | if (DD && DD->isVirtual() && !DD->isDeleted()) { | ||||
17512 | if (Class->hasUserDeclaredDestructor() && !DD->isDefined()) { | ||||
17513 | // If this is an out-of-line declaration, marking it referenced will | ||||
17514 | // not do anything. Manually call CheckDestructor to look up operator | ||||
17515 | // delete(). | ||||
17516 | ContextRAII SavedContext(*this, DD); | ||||
17517 | CheckDestructor(DD); | ||||
17518 | } else { | ||||
17519 | MarkFunctionReferenced(Loc, Class->getDestructor()); | ||||
17520 | } | ||||
17521 | } | ||||
17522 | } | ||||
17523 | } | ||||
17524 | |||||
17525 | // Local classes need to have their virtual members marked | ||||
17526 | // immediately. For all other classes, we mark their virtual members | ||||
17527 | // at the end of the translation unit. | ||||
17528 | if (Class->isLocalClass()) | ||||
17529 | MarkVirtualMembersReferenced(Loc, Class); | ||||
17530 | else | ||||
17531 | VTableUses.push_back(std::make_pair(Class, Loc)); | ||||
17532 | } | ||||
17533 | |||||
17534 | bool Sema::DefineUsedVTables() { | ||||
17535 | LoadExternalVTableUses(); | ||||
17536 | if (VTableUses.empty()) | ||||
17537 | return false; | ||||
17538 | |||||
17539 | // Note: The VTableUses vector could grow as a result of marking | ||||
17540 | // the members of a class as "used", so we check the size each | ||||
17541 | // time through the loop and prefer indices (which are stable) to | ||||
17542 | // iterators (which are not). | ||||
17543 | bool DefinedAnything = false; | ||||
17544 | for (unsigned I = 0; I != VTableUses.size(); ++I) { | ||||
17545 | CXXRecordDecl *Class = VTableUses[I].first->getDefinition(); | ||||
17546 | if (!Class) | ||||
17547 | continue; | ||||
17548 | TemplateSpecializationKind ClassTSK = | ||||
17549 | Class->getTemplateSpecializationKind(); | ||||
17550 | |||||
17551 | SourceLocation Loc = VTableUses[I].second; | ||||
17552 | |||||
17553 | bool DefineVTable = true; | ||||
17554 | |||||
17555 | // If this class has a key function, but that key function is | ||||
17556 | // defined in another translation unit, we don't need to emit the | ||||
17557 | // vtable even though we're using it. | ||||
17558 | const CXXMethodDecl *KeyFunction = Context.getCurrentKeyFunction(Class); | ||||
17559 | if (KeyFunction && !KeyFunction->hasBody()) { | ||||
17560 | // The key function is in another translation unit. | ||||
17561 | DefineVTable = false; | ||||
17562 | TemplateSpecializationKind TSK = | ||||
17563 | KeyFunction->getTemplateSpecializationKind(); | ||||
17564 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17566, __extension__ __PRETTY_FUNCTION__)) | ||||
17565 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17566, __extension__ __PRETTY_FUNCTION__)) | ||||
17566 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17566, __extension__ __PRETTY_FUNCTION__)); | ||||
17567 | (void)TSK; | ||||
17568 | } else if (!KeyFunction) { | ||||
17569 | // If we have a class with no key function that is the subject | ||||
17570 | // of an explicit instantiation declaration, suppress the | ||||
17571 | // vtable; it will live with the explicit instantiation | ||||
17572 | // definition. | ||||
17573 | bool IsExplicitInstantiationDeclaration = | ||||
17574 | ClassTSK == TSK_ExplicitInstantiationDeclaration; | ||||
17575 | for (auto R : Class->redecls()) { | ||||
17576 | TemplateSpecializationKind TSK | ||||
17577 | = cast<CXXRecordDecl>(R)->getTemplateSpecializationKind(); | ||||
17578 | if (TSK == TSK_ExplicitInstantiationDeclaration) | ||||
17579 | IsExplicitInstantiationDeclaration = true; | ||||
17580 | else if (TSK == TSK_ExplicitInstantiationDefinition) { | ||||
17581 | IsExplicitInstantiationDeclaration = false; | ||||
17582 | break; | ||||
17583 | } | ||||
17584 | } | ||||
17585 | |||||
17586 | if (IsExplicitInstantiationDeclaration) | ||||
17587 | DefineVTable = false; | ||||
17588 | } | ||||
17589 | |||||
17590 | // The exception specifications for all virtual members may be needed even | ||||
17591 | // if we are not providing an authoritative form of the vtable in this TU. | ||||
17592 | // We may choose to emit it available_externally anyway. | ||||
17593 | if (!DefineVTable) { | ||||
17594 | MarkVirtualMemberExceptionSpecsNeeded(Loc, Class); | ||||
17595 | continue; | ||||
17596 | } | ||||
17597 | |||||
17598 | // Mark all of the virtual members of this class as referenced, so | ||||
17599 | // that we can build a vtable. Then, tell the AST consumer that a | ||||
17600 | // vtable for this class is required. | ||||
17601 | DefinedAnything = true; | ||||
17602 | MarkVirtualMembersReferenced(Loc, Class); | ||||
17603 | CXXRecordDecl *Canonical = Class->getCanonicalDecl(); | ||||
17604 | if (VTablesUsed[Canonical]) | ||||
17605 | Consumer.HandleVTable(Class); | ||||
17606 | |||||
17607 | // Warn if we're emitting a weak vtable. The vtable will be weak if there is | ||||
17608 | // no key function or the key function is inlined. Don't warn in C++ ABIs | ||||
17609 | // that lack key functions, since the user won't be able to make one. | ||||
17610 | if (Context.getTargetInfo().getCXXABI().hasKeyFunctions() && | ||||
17611 | Class->isExternallyVisible() && ClassTSK != TSK_ImplicitInstantiation) { | ||||
17612 | const FunctionDecl *KeyFunctionDef = nullptr; | ||||
17613 | if (!KeyFunction || (KeyFunction->hasBody(KeyFunctionDef) && | ||||
17614 | KeyFunctionDef->isInlined())) { | ||||
17615 | Diag(Class->getLocation(), | ||||
17616 | ClassTSK == TSK_ExplicitInstantiationDefinition | ||||
17617 | ? diag::warn_weak_template_vtable | ||||
17618 | : diag::warn_weak_vtable) | ||||
17619 | << Class; | ||||
17620 | } | ||||
17621 | } | ||||
17622 | } | ||||
17623 | VTableUses.clear(); | ||||
17624 | |||||
17625 | return DefinedAnything; | ||||
17626 | } | ||||
17627 | |||||
17628 | void Sema::MarkVirtualMemberExceptionSpecsNeeded(SourceLocation Loc, | ||||
17629 | const CXXRecordDecl *RD) { | ||||
17630 | for (const auto *I : RD->methods()) | ||||
17631 | if (I->isVirtual() && !I->isPure()) | ||||
17632 | ResolveExceptionSpec(Loc, I->getType()->castAs<FunctionProtoType>()); | ||||
17633 | } | ||||
17634 | |||||
17635 | void Sema::MarkVirtualMembersReferenced(SourceLocation Loc, | ||||
17636 | const CXXRecordDecl *RD, | ||||
17637 | bool ConstexprOnly) { | ||||
17638 | // Mark all functions which will appear in RD's vtable as used. | ||||
17639 | CXXFinalOverriderMap FinalOverriders; | ||||
17640 | RD->getFinalOverriders(FinalOverriders); | ||||
17641 | for (CXXFinalOverriderMap::const_iterator I = FinalOverriders.begin(), | ||||
17642 | E = FinalOverriders.end(); | ||||
17643 | I != E; ++I) { | ||||
17644 | for (OverridingMethods::const_iterator OI = I->second.begin(), | ||||
17645 | OE = I->second.end(); | ||||
17646 | OI != OE; ++OI) { | ||||
17647 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17647, __extension__ __PRETTY_FUNCTION__)); | ||||
17648 | CXXMethodDecl *Overrider = OI->second.front().Method; | ||||
17649 | |||||
17650 | // C++ [basic.def.odr]p2: | ||||
17651 | // [...] A virtual member function is used if it is not pure. [...] | ||||
17652 | if (!Overrider->isPure() && (!ConstexprOnly || Overrider->isConstexpr())) | ||||
17653 | MarkFunctionReferenced(Loc, Overrider); | ||||
17654 | } | ||||
17655 | } | ||||
17656 | |||||
17657 | // Only classes that have virtual bases need a VTT. | ||||
17658 | if (RD->getNumVBases() == 0) | ||||
17659 | return; | ||||
17660 | |||||
17661 | for (const auto &I : RD->bases()) { | ||||
17662 | const auto *Base = | ||||
17663 | cast<CXXRecordDecl>(I.getType()->castAs<RecordType>()->getDecl()); | ||||
17664 | if (Base->getNumVBases() == 0) | ||||
17665 | continue; | ||||
17666 | MarkVirtualMembersReferenced(Loc, Base); | ||||
17667 | } | ||||
17668 | } | ||||
17669 | |||||
17670 | /// SetIvarInitializers - This routine builds initialization ASTs for the | ||||
17671 | /// Objective-C implementation whose ivars need be initialized. | ||||
17672 | void Sema::SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation) { | ||||
17673 | if (!getLangOpts().CPlusPlus) | ||||
17674 | return; | ||||
17675 | if (ObjCInterfaceDecl *OID = ObjCImplementation->getClassInterface()) { | ||||
17676 | SmallVector<ObjCIvarDecl*, 8> ivars; | ||||
17677 | CollectIvarsToConstructOrDestruct(OID, ivars); | ||||
17678 | if (ivars.empty()) | ||||
17679 | return; | ||||
17680 | SmallVector<CXXCtorInitializer*, 32> AllToInit; | ||||
17681 | for (unsigned i = 0; i < ivars.size(); i++) { | ||||
17682 | FieldDecl *Field = ivars[i]; | ||||
17683 | if (Field->isInvalidDecl()) | ||||
17684 | continue; | ||||
17685 | |||||
17686 | CXXCtorInitializer *Member; | ||||
17687 | InitializedEntity InitEntity = InitializedEntity::InitializeMember(Field); | ||||
17688 | InitializationKind InitKind = | ||||
17689 | InitializationKind::CreateDefault(ObjCImplementation->getLocation()); | ||||
17690 | |||||
17691 | InitializationSequence InitSeq(*this, InitEntity, InitKind, None); | ||||
17692 | ExprResult MemberInit = | ||||
17693 | InitSeq.Perform(*this, InitEntity, InitKind, None); | ||||
17694 | MemberInit = MaybeCreateExprWithCleanups(MemberInit); | ||||
17695 | // Note, MemberInit could actually come back empty if no initialization | ||||
17696 | // is required (e.g., because it would call a trivial default constructor) | ||||
17697 | if (!MemberInit.get() || MemberInit.isInvalid()) | ||||
17698 | continue; | ||||
17699 | |||||
17700 | Member = | ||||
17701 | new (Context) CXXCtorInitializer(Context, Field, SourceLocation(), | ||||
17702 | SourceLocation(), | ||||
17703 | MemberInit.getAs<Expr>(), | ||||
17704 | SourceLocation()); | ||||
17705 | AllToInit.push_back(Member); | ||||
17706 | |||||
17707 | // Be sure that the destructor is accessible and is marked as referenced. | ||||
17708 | if (const RecordType *RecordTy = | ||||
17709 | Context.getBaseElementType(Field->getType()) | ||||
17710 | ->getAs<RecordType>()) { | ||||
17711 | CXXRecordDecl *RD = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||
17712 | if (CXXDestructorDecl *Destructor = LookupDestructor(RD)) { | ||||
17713 | MarkFunctionReferenced(Field->getLocation(), Destructor); | ||||
17714 | CheckDestructorAccess(Field->getLocation(), Destructor, | ||||
17715 | PDiag(diag::err_access_dtor_ivar) | ||||
17716 | << Context.getBaseElementType(Field->getType())); | ||||
17717 | } | ||||
17718 | } | ||||
17719 | } | ||||
17720 | ObjCImplementation->setIvarInitializers(Context, | ||||
17721 | AllToInit.data(), AllToInit.size()); | ||||
17722 | } | ||||
17723 | } | ||||
17724 | |||||
17725 | static | ||||
17726 | void DelegatingCycleHelper(CXXConstructorDecl* Ctor, | ||||
17727 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Valid, | ||||
17728 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Invalid, | ||||
17729 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Current, | ||||
17730 | Sema &S) { | ||||
17731 | if (Ctor->isInvalidDecl()) | ||||
17732 | return; | ||||
17733 | |||||
17734 | CXXConstructorDecl *Target = Ctor->getTargetConstructor(); | ||||
17735 | |||||
17736 | // Target may not be determinable yet, for instance if this is a dependent | ||||
17737 | // call in an uninstantiated template. | ||||
17738 | if (Target) { | ||||
17739 | const FunctionDecl *FNTarget = nullptr; | ||||
17740 | (void)Target->hasBody(FNTarget); | ||||
17741 | Target = const_cast<CXXConstructorDecl*>( | ||||
17742 | cast_or_null<CXXConstructorDecl>(FNTarget)); | ||||
17743 | } | ||||
17744 | |||||
17745 | CXXConstructorDecl *Canonical = Ctor->getCanonicalDecl(), | ||||
17746 | // Avoid dereferencing a null pointer here. | ||||
17747 | *TCanonical = Target? Target->getCanonicalDecl() : nullptr; | ||||
17748 | |||||
17749 | if (!Current.insert(Canonical).second) | ||||
17750 | return; | ||||
17751 | |||||
17752 | // We know that beyond here, we aren't chaining into a cycle. | ||||
17753 | if (!Target || !Target->isDelegatingConstructor() || | ||||
17754 | Target->isInvalidDecl() || Valid.count(TCanonical)) { | ||||
17755 | Valid.insert(Current.begin(), Current.end()); | ||||
17756 | Current.clear(); | ||||
17757 | // We've hit a cycle. | ||||
17758 | } else if (TCanonical == Canonical || Invalid.count(TCanonical) || | ||||
17759 | Current.count(TCanonical)) { | ||||
17760 | // If we haven't diagnosed this cycle yet, do so now. | ||||
17761 | if (!Invalid.count(TCanonical)) { | ||||
17762 | S.Diag((*Ctor->init_begin())->getSourceLocation(), | ||||
17763 | diag::warn_delegating_ctor_cycle) | ||||
17764 | << Ctor; | ||||
17765 | |||||
17766 | // Don't add a note for a function delegating directly to itself. | ||||
17767 | if (TCanonical != Canonical) | ||||
17768 | S.Diag(Target->getLocation(), diag::note_it_delegates_to); | ||||
17769 | |||||
17770 | CXXConstructorDecl *C = Target; | ||||
17771 | while (C->getCanonicalDecl() != Canonical) { | ||||
17772 | const FunctionDecl *FNTarget = nullptr; | ||||
17773 | (void)C->getTargetConstructor()->hasBody(FNTarget); | ||||
17774 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17774, __extension__ __PRETTY_FUNCTION__)); | ||||
17775 | |||||
17776 | C = const_cast<CXXConstructorDecl*>( | ||||
17777 | cast<CXXConstructorDecl>(FNTarget)); | ||||
17778 | S.Diag(C->getLocation(), diag::note_which_delegates_to); | ||||
17779 | } | ||||
17780 | } | ||||
17781 | |||||
17782 | Invalid.insert(Current.begin(), Current.end()); | ||||
17783 | Current.clear(); | ||||
17784 | } else { | ||||
17785 | DelegatingCycleHelper(Target, Valid, Invalid, Current, S); | ||||
17786 | } | ||||
17787 | } | ||||
17788 | |||||
17789 | |||||
17790 | void Sema::CheckDelegatingCtorCycles() { | ||||
17791 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> Valid, Invalid, Current; | ||||
17792 | |||||
17793 | for (DelegatingCtorDeclsType::iterator | ||||
17794 | I = DelegatingCtorDecls.begin(ExternalSource), | ||||
17795 | E = DelegatingCtorDecls.end(); | ||||
17796 | I != E; ++I) | ||||
17797 | DelegatingCycleHelper(*I, Valid, Invalid, Current, *this); | ||||
17798 | |||||
17799 | for (auto CI = Invalid.begin(), CE = Invalid.end(); CI != CE; ++CI) | ||||
17800 | (*CI)->setInvalidDecl(); | ||||
17801 | } | ||||
17802 | |||||
17803 | namespace { | ||||
17804 | /// AST visitor that finds references to the 'this' expression. | ||||
17805 | class FindCXXThisExpr : public RecursiveASTVisitor<FindCXXThisExpr> { | ||||
17806 | Sema &S; | ||||
17807 | |||||
17808 | public: | ||||
17809 | explicit FindCXXThisExpr(Sema &S) : S(S) { } | ||||
17810 | |||||
17811 | bool VisitCXXThisExpr(CXXThisExpr *E) { | ||||
17812 | S.Diag(E->getLocation(), diag::err_this_static_member_func) | ||||
17813 | << E->isImplicit(); | ||||
17814 | return false; | ||||
17815 | } | ||||
17816 | }; | ||||
17817 | } | ||||
17818 | |||||
17819 | bool Sema::checkThisInStaticMemberFunctionType(CXXMethodDecl *Method) { | ||||
17820 | TypeSourceInfo *TSInfo = Method->getTypeSourceInfo(); | ||||
17821 | if (!TSInfo) | ||||
17822 | return false; | ||||
17823 | |||||
17824 | TypeLoc TL = TSInfo->getTypeLoc(); | ||||
17825 | FunctionProtoTypeLoc ProtoTL = TL.getAs<FunctionProtoTypeLoc>(); | ||||
17826 | if (!ProtoTL) | ||||
17827 | return false; | ||||
17828 | |||||
17829 | // C++11 [expr.prim.general]p3: | ||||
17830 | // [The expression this] shall not appear before the optional | ||||
17831 | // cv-qualifier-seq and it shall not appear within the declaration of a | ||||
17832 | // static member function (although its type and value category are defined | ||||
17833 | // within a static member function as they are within a non-static member | ||||
17834 | // function). [ Note: this is because declaration matching does not occur | ||||
17835 | // until the complete declarator is known. - end note ] | ||||
17836 | const FunctionProtoType *Proto = ProtoTL.getTypePtr(); | ||||
17837 | FindCXXThisExpr Finder(*this); | ||||
17838 | |||||
17839 | // If the return type came after the cv-qualifier-seq, check it now. | ||||
17840 | if (Proto->hasTrailingReturn() && | ||||
17841 | !Finder.TraverseTypeLoc(ProtoTL.getReturnLoc())) | ||||
17842 | return true; | ||||
17843 | |||||
17844 | // Check the exception specification. | ||||
17845 | if (checkThisInStaticMemberFunctionExceptionSpec(Method)) | ||||
17846 | return true; | ||||
17847 | |||||
17848 | // Check the trailing requires clause | ||||
17849 | if (Expr *E = Method->getTrailingRequiresClause()) | ||||
17850 | if (!Finder.TraverseStmt(E)) | ||||
17851 | return true; | ||||
17852 | |||||
17853 | return checkThisInStaticMemberFunctionAttributes(Method); | ||||
17854 | } | ||||
17855 | |||||
17856 | bool Sema::checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method) { | ||||
17857 | TypeSourceInfo *TSInfo = Method->getTypeSourceInfo(); | ||||
17858 | if (!TSInfo) | ||||
17859 | return false; | ||||
17860 | |||||
17861 | TypeLoc TL = TSInfo->getTypeLoc(); | ||||
17862 | FunctionProtoTypeLoc ProtoTL = TL.getAs<FunctionProtoTypeLoc>(); | ||||
17863 | if (!ProtoTL) | ||||
17864 | return false; | ||||
17865 | |||||
17866 | const FunctionProtoType *Proto = ProtoTL.getTypePtr(); | ||||
17867 | FindCXXThisExpr Finder(*this); | ||||
17868 | |||||
17869 | switch (Proto->getExceptionSpecType()) { | ||||
17870 | case EST_Unparsed: | ||||
17871 | case EST_Uninstantiated: | ||||
17872 | case EST_Unevaluated: | ||||
17873 | case EST_BasicNoexcept: | ||||
17874 | case EST_NoThrow: | ||||
17875 | case EST_DynamicNone: | ||||
17876 | case EST_MSAny: | ||||
17877 | case EST_None: | ||||
17878 | break; | ||||
17879 | |||||
17880 | case EST_DependentNoexcept: | ||||
17881 | case EST_NoexceptFalse: | ||||
17882 | case EST_NoexceptTrue: | ||||
17883 | if (!Finder.TraverseStmt(Proto->getNoexceptExpr())) | ||||
17884 | return true; | ||||
17885 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||
17886 | |||||
17887 | case EST_Dynamic: | ||||
17888 | for (const auto &E : Proto->exceptions()) { | ||||
17889 | if (!Finder.TraverseType(E)) | ||||
17890 | return true; | ||||
17891 | } | ||||
17892 | break; | ||||
17893 | } | ||||
17894 | |||||
17895 | return false; | ||||
17896 | } | ||||
17897 | |||||
17898 | bool Sema::checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method) { | ||||
17899 | FindCXXThisExpr Finder(*this); | ||||
17900 | |||||
17901 | // Check attributes. | ||||
17902 | for (const auto *A : Method->attrs()) { | ||||
17903 | // FIXME: This should be emitted by tblgen. | ||||
17904 | Expr *Arg = nullptr; | ||||
17905 | ArrayRef<Expr *> Args; | ||||
17906 | if (const auto *G = dyn_cast<GuardedByAttr>(A)) | ||||
17907 | Arg = G->getArg(); | ||||
17908 | else if (const auto *G = dyn_cast<PtGuardedByAttr>(A)) | ||||
17909 | Arg = G->getArg(); | ||||
17910 | else if (const auto *AA = dyn_cast<AcquiredAfterAttr>(A)) | ||||
17911 | Args = llvm::makeArrayRef(AA->args_begin(), AA->args_size()); | ||||
17912 | else if (const auto *AB = dyn_cast<AcquiredBeforeAttr>(A)) | ||||
17913 | Args = llvm::makeArrayRef(AB->args_begin(), AB->args_size()); | ||||
17914 | else if (const auto *ETLF = dyn_cast<ExclusiveTrylockFunctionAttr>(A)) { | ||||
17915 | Arg = ETLF->getSuccessValue(); | ||||
17916 | Args = llvm::makeArrayRef(ETLF->args_begin(), ETLF->args_size()); | ||||
17917 | } else if (const auto *STLF = dyn_cast<SharedTrylockFunctionAttr>(A)) { | ||||
17918 | Arg = STLF->getSuccessValue(); | ||||
17919 | Args = llvm::makeArrayRef(STLF->args_begin(), STLF->args_size()); | ||||
17920 | } else if (const auto *LR = dyn_cast<LockReturnedAttr>(A)) | ||||
17921 | Arg = LR->getArg(); | ||||
17922 | else if (const auto *LE = dyn_cast<LocksExcludedAttr>(A)) | ||||
17923 | Args = llvm::makeArrayRef(LE->args_begin(), LE->args_size()); | ||||
17924 | else if (const auto *RC = dyn_cast<RequiresCapabilityAttr>(A)) | ||||
17925 | Args = llvm::makeArrayRef(RC->args_begin(), RC->args_size()); | ||||
17926 | else if (const auto *AC = dyn_cast<AcquireCapabilityAttr>(A)) | ||||
17927 | Args = llvm::makeArrayRef(AC->args_begin(), AC->args_size()); | ||||
17928 | else if (const auto *AC = dyn_cast<TryAcquireCapabilityAttr>(A)) | ||||
17929 | Args = llvm::makeArrayRef(AC->args_begin(), AC->args_size()); | ||||
17930 | else if (const auto *RC = dyn_cast<ReleaseCapabilityAttr>(A)) | ||||
17931 | Args = llvm::makeArrayRef(RC->args_begin(), RC->args_size()); | ||||
17932 | |||||
17933 | if (Arg && !Finder.TraverseStmt(Arg)) | ||||
17934 | return true; | ||||
17935 | |||||
17936 | for (unsigned I = 0, N = Args.size(); I != N; ++I) { | ||||
17937 | if (!Finder.TraverseStmt(Args[I])) | ||||
17938 | return true; | ||||
17939 | } | ||||
17940 | } | ||||
17941 | |||||
17942 | return false; | ||||
17943 | } | ||||
17944 | |||||
17945 | void Sema::checkExceptionSpecification( | ||||
17946 | bool IsTopLevel, ExceptionSpecificationType EST, | ||||
17947 | ArrayRef<ParsedType> DynamicExceptions, | ||||
17948 | ArrayRef<SourceRange> DynamicExceptionRanges, Expr *NoexceptExpr, | ||||
17949 | SmallVectorImpl<QualType> &Exceptions, | ||||
17950 | FunctionProtoType::ExceptionSpecInfo &ESI) { | ||||
17951 | Exceptions.clear(); | ||||
17952 | ESI.Type = EST; | ||||
17953 | if (EST == EST_Dynamic) { | ||||
17954 | Exceptions.reserve(DynamicExceptions.size()); | ||||
17955 | for (unsigned ei = 0, ee = DynamicExceptions.size(); ei != ee; ++ei) { | ||||
17956 | // FIXME: Preserve type source info. | ||||
17957 | QualType ET = GetTypeFromParser(DynamicExceptions[ei]); | ||||
17958 | |||||
17959 | if (IsTopLevel) { | ||||
17960 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; | ||||
17961 | collectUnexpandedParameterPacks(ET, Unexpanded); | ||||
17962 | if (!Unexpanded.empty()) { | ||||
17963 | DiagnoseUnexpandedParameterPacks( | ||||
17964 | DynamicExceptionRanges[ei].getBegin(), UPPC_ExceptionType, | ||||
17965 | Unexpanded); | ||||
17966 | continue; | ||||
17967 | } | ||||
17968 | } | ||||
17969 | |||||
17970 | // Check that the type is valid for an exception spec, and | ||||
17971 | // drop it if not. | ||||
17972 | if (!CheckSpecifiedExceptionType(ET, DynamicExceptionRanges[ei])) | ||||
17973 | Exceptions.push_back(ET); | ||||
17974 | } | ||||
17975 | ESI.Exceptions = Exceptions; | ||||
17976 | return; | ||||
17977 | } | ||||
17978 | |||||
17979 | if (isComputedNoexcept(EST)) { | ||||
17980 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17983, __extension__ __PRETTY_FUNCTION__)) | ||||
17981 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17983, __extension__ __PRETTY_FUNCTION__)) | ||||
17982 | 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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17983, __extension__ __PRETTY_FUNCTION__)) | ||||
17983 | "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-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDeclCXX.cpp" , 17983, __extension__ __PRETTY_FUNCTION__)); | ||||
17984 | if (IsTopLevel && DiagnoseUnexpandedParameterPack(NoexceptExpr)) { | ||||
17985 | ESI.Type = EST_BasicNoexcept; | ||||
17986 | return; | ||||
17987 | } | ||||
17988 | |||||
17989 | ESI.NoexceptExpr = NoexceptExpr; | ||||
17990 | return; | ||||
17991 | } | ||||
17992 | } | ||||
17993 | |||||
17994 | void Sema::actOnDelayedExceptionSpecification(Decl *MethodD, | ||||
17995 | ExceptionSpecificationType EST, | ||||
17996 | SourceRange SpecificationRange, | ||||
17997 | ArrayRef<ParsedType> DynamicExceptions, | ||||
17998 | ArrayRef<SourceRange> DynamicExceptionRanges, | ||||
17999 | Expr *NoexceptExpr) { | ||||
18000 | if (!MethodD) | ||||
18001 | return; | ||||
18002 | |||||
18003 | // Dig out the method we're referring to. | ||||
18004 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(MethodD)) | ||||
18005 | MethodD = FunTmpl->getTemplatedDecl(); | ||||
18006 | |||||
18007 | CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(MethodD); | ||||
18008 | if (!Method) | ||||
18009 | return; | ||||
18010 | |||||
18011 | // Check the exception specification. | ||||
18012 | llvm::SmallVector<QualType, 4> Exceptions; | ||||
18013 | FunctionProtoType::ExceptionSpecInfo ESI; | ||||
18014 | checkExceptionSpecification(/*IsTopLevel*/true, EST, DynamicExceptions, | ||||
18015 | DynamicExceptionRanges, NoexceptExpr, Exceptions, | ||||
18016 | ESI); | ||||
18017 | |||||
18018 | // Update the exception specification on the function type. | ||||
18019 | Context.adjustExceptionSpec(Method, ESI, /*AsWritten*/true); | ||||
18020 | |||||
18021 | if (Method->isStatic()) | ||||
18022 | checkThisInStaticMemberFunctionExceptionSpec(Method); | ||||
18023 | |||||
18024 | if (Method->isVirtual()) { | ||||
18025 | // Check overrides, which we previously had to delay. | ||||
18026 | for (const CXXMethodDecl *O : Method->overridden_methods()) | ||||
18027 | CheckOverridingFunctionExceptionSpec(Method, O); | ||||
18028 | } | ||||
18029 | } | ||||
18030 | |||||
18031 | /// HandleMSProperty - Analyze a __delcspec(property) field of a C++ class. | ||||
18032 | /// | ||||
18033 | MSPropertyDecl *Sema::HandleMSProperty(Scope *S, RecordDecl *Record, | ||||
18034 | SourceLocation DeclStart, Declarator &D, | ||||
18035 | Expr *BitWidth, | ||||
18036 | InClassInitStyle InitStyle, | ||||
18037 | AccessSpecifier AS, | ||||
18038 | const ParsedAttr &MSPropertyAttr) { | ||||
18039 | IdentifierInfo *II = D.getIdentifier(); | ||||
18040 | if (!II) { | ||||
18041 | Diag(DeclStart, diag::err_anonymous_property); | ||||
18042 | return nullptr; | ||||
18043 | } | ||||
18044 | SourceLocation Loc = D.getIdentifierLoc(); | ||||
18045 | |||||
18046 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||
18047 | QualType T = TInfo->getType(); | ||||
18048 | if (getLangOpts().CPlusPlus) { | ||||
18049 | CheckExtraCXXDefaultArguments(D); | ||||
18050 | |||||
18051 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||
18052 | UPPC_DataMemberType)) { | ||||
18053 | D.setInvalidType(); | ||||
18054 | T = Context.IntTy; | ||||
18055 | TInfo = Context.getTrivialTypeSourceInfo(T, Loc); | ||||
18056 | } | ||||
18057 | } | ||||
18058 | |||||
18059 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||
18060 | |||||
18061 | if (D.getDeclSpec().isInlineSpecified()) | ||||
18062 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||
18063 | << getLangOpts().CPlusPlus17; | ||||
18064 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||
18065 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||
18066 | diag::err_invalid_thread) | ||||
18067 | << DeclSpec::getSpecifierName(TSCS); | ||||
18068 | |||||
18069 | // Check to see if this name was declared as a member previously | ||||
18070 | NamedDecl *PrevDecl = nullptr; | ||||
18071 | LookupResult Previous(*this, II, Loc, LookupMemberName, | ||||
18072 | ForVisibleRedeclaration); | ||||
18073 | LookupName(Previous, S); | ||||
18074 | switch (Previous.getResultKind()) { | ||||
18075 | case LookupResult::Found: | ||||
18076 | case LookupResult::FoundUnresolvedValue: | ||||
18077 | PrevDecl = Previous.getAsSingle<NamedDecl>(); | ||||
18078 | break; | ||||
18079 | |||||
18080 | case LookupResult::FoundOverloaded: | ||||
18081 | PrevDecl = Previous.getRepresentativeDecl(); | ||||
18082 | break; | ||||
18083 | |||||
18084 | case LookupResult::NotFound: | ||||
18085 | case LookupResult::NotFoundInCurrentInstantiation: | ||||
18086 | case LookupResult::Ambiguous: | ||||
18087 | break; | ||||
18088 | } | ||||
18089 | |||||
18090 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | ||||
18091 | // Maybe we will complain about the shadowed template parameter. | ||||
18092 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||
18093 | // Just pretend that we didn't see the previous declaration. | ||||
18094 | PrevDecl = nullptr; | ||||
18095 | } | ||||
18096 | |||||
18097 | if (PrevDecl && !isDeclInScope(PrevDecl, Record, S)) | ||||
18098 | PrevDecl = nullptr; | ||||
18099 | |||||
18100 | SourceLocation TSSL = D.getBeginLoc(); | ||||
18101 | MSPropertyDecl *NewPD = | ||||
18102 | MSPropertyDecl::Create(Context, Record, Loc, II, T, TInfo, TSSL, | ||||
18103 | MSPropertyAttr.getPropertyDataGetter(), | ||||
18104 | MSPropertyAttr.getPropertyDataSetter()); | ||||
18105 | ProcessDeclAttributes(TUScope, NewPD, D); | ||||
18106 | NewPD->setAccess(AS); | ||||
18107 | |||||
18108 | if (NewPD->isInvalidDecl()) | ||||
18109 | Record->setInvalidDecl(); | ||||
18110 | |||||
18111 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||
18112 | NewPD->setModulePrivate(); | ||||
18113 | |||||
18114 | if (NewPD->isInvalidDecl() && PrevDecl) { | ||||
18115 | // Don't introduce NewFD into scope; there's already something | ||||
18116 | // with the same name in the same scope. | ||||
18117 | } else if (II) { | ||||
18118 | PushOnScopeChains(NewPD, S); | ||||
18119 | } else | ||||
18120 | Record->addDecl(NewPD); | ||||
18121 | |||||
18122 | return NewPD; | ||||
18123 | } | ||||
18124 | |||||
18125 | void Sema::ActOnStartFunctionDeclarationDeclarator( | ||||
18126 | Declarator &Declarator, unsigned TemplateParameterDepth) { | ||||
18127 | auto &Info = InventedParameterInfos.emplace_back(); | ||||
18128 | TemplateParameterList *ExplicitParams = nullptr; | ||||
18129 | ArrayRef<TemplateParameterList *> ExplicitLists = | ||||
18130 | Declarator.getTemplateParameterLists(); | ||||
18131 | if (!ExplicitLists.empty()) { | ||||
18132 | bool IsMemberSpecialization, IsInvalid; | ||||
18133 | ExplicitParams = MatchTemplateParametersToScopeSpecifier( | ||||
18134 | Declarator.getBeginLoc(), Declarator.getIdentifierLoc(), | ||||
18135 | Declarator.getCXXScopeSpec(), /*TemplateId=*/nullptr, | ||||
18136 | ExplicitLists, /*IsFriend=*/false, IsMemberSpecialization, IsInvalid, | ||||
18137 | /*SuppressDiagnostic=*/true); | ||||
18138 | } | ||||
18139 | if (ExplicitParams) { | ||||
18140 | Info.AutoTemplateParameterDepth = ExplicitParams->getDepth(); | ||||
18141 | for (NamedDecl *Param : *ExplicitParams) | ||||
18142 | Info.TemplateParams.push_back(Param); | ||||
18143 | Info.NumExplicitTemplateParams = ExplicitParams->size(); | ||||
18144 | } else { | ||||
18145 | Info.AutoTemplateParameterDepth = TemplateParameterDepth; | ||||
18146 | Info.NumExplicitTemplateParams = 0; | ||||
18147 | } | ||||
18148 | } | ||||
18149 | |||||
18150 | void Sema::ActOnFinishFunctionDeclarationDeclarator(Declarator &Declarator) { | ||||
18151 | auto &FSI = InventedParameterInfos.back(); | ||||
18152 | if (FSI.TemplateParams.size() > FSI.NumExplicitTemplateParams) { | ||||
18153 | if (FSI.NumExplicitTemplateParams != 0) { | ||||
18154 | TemplateParameterList *ExplicitParams = | ||||
18155 | Declarator.getTemplateParameterLists().back(); | ||||
18156 | Declarator.setInventedTemplateParameterList( | ||||
18157 | TemplateParameterList::Create( | ||||
18158 | Context, ExplicitParams->getTemplateLoc(), | ||||
18159 | ExplicitParams->getLAngleLoc(), FSI.TemplateParams, | ||||
18160 | ExplicitParams->getRAngleLoc(), | ||||
18161 | ExplicitParams->getRequiresClause())); | ||||
18162 | } else { | ||||
18163 | Declarator.setInventedTemplateParameterList( | ||||
18164 | TemplateParameterList::Create( | ||||
18165 | Context, SourceLocation(), SourceLocation(), FSI.TemplateParams, | ||||
18166 | SourceLocation(), /*RequiresClause=*/nullptr)); | ||||
18167 | } | ||||
18168 | } | ||||
18169 | InventedParameterInfos.pop_back(); | ||||
18170 | } |
1 | //===- DeclCXX.h - Classes for representing C++ declarations --*- 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 | /// Defines the C++ Decl subclasses, other than those for templates |
11 | /// (found in DeclTemplate.h) and friends (in DeclFriend.h). |
12 | // |
13 | //===----------------------------------------------------------------------===// |
14 | |
15 | #ifndef LLVM_CLANG_AST_DECLCXX_H |
16 | #define LLVM_CLANG_AST_DECLCXX_H |
17 | |
18 | #include "clang/AST/ASTUnresolvedSet.h" |
19 | #include "clang/AST/Decl.h" |
20 | #include "clang/AST/DeclBase.h" |
21 | #include "clang/AST/DeclarationName.h" |
22 | #include "clang/AST/Expr.h" |
23 | #include "clang/AST/ExternalASTSource.h" |
24 | #include "clang/AST/LambdaCapture.h" |
25 | #include "clang/AST/NestedNameSpecifier.h" |
26 | #include "clang/AST/Redeclarable.h" |
27 | #include "clang/AST/Stmt.h" |
28 | #include "clang/AST/Type.h" |
29 | #include "clang/AST/TypeLoc.h" |
30 | #include "clang/AST/UnresolvedSet.h" |
31 | #include "clang/Basic/LLVM.h" |
32 | #include "clang/Basic/Lambda.h" |
33 | #include "clang/Basic/LangOptions.h" |
34 | #include "clang/Basic/OperatorKinds.h" |
35 | #include "clang/Basic/SourceLocation.h" |
36 | #include "clang/Basic/Specifiers.h" |
37 | #include "llvm/ADT/ArrayRef.h" |
38 | #include "llvm/ADT/DenseMap.h" |
39 | #include "llvm/ADT/PointerIntPair.h" |
40 | #include "llvm/ADT/PointerUnion.h" |
41 | #include "llvm/ADT/STLExtras.h" |
42 | #include "llvm/ADT/TinyPtrVector.h" |
43 | #include "llvm/ADT/iterator_range.h" |
44 | #include "llvm/Support/Casting.h" |
45 | #include "llvm/Support/Compiler.h" |
46 | #include "llvm/Support/PointerLikeTypeTraits.h" |
47 | #include "llvm/Support/TrailingObjects.h" |
48 | #include <cassert> |
49 | #include <cstddef> |
50 | #include <iterator> |
51 | #include <memory> |
52 | #include <vector> |
53 | |
54 | namespace clang { |
55 | |
56 | class ASTContext; |
57 | class ClassTemplateDecl; |
58 | class ConstructorUsingShadowDecl; |
59 | class CXXBasePath; |
60 | class CXXBasePaths; |
61 | class CXXConstructorDecl; |
62 | class CXXDestructorDecl; |
63 | class CXXFinalOverriderMap; |
64 | class CXXIndirectPrimaryBaseSet; |
65 | class CXXMethodDecl; |
66 | class DecompositionDecl; |
67 | class DiagnosticBuilder; |
68 | class FriendDecl; |
69 | class FunctionTemplateDecl; |
70 | class IdentifierInfo; |
71 | class MemberSpecializationInfo; |
72 | class BaseUsingDecl; |
73 | class TemplateDecl; |
74 | class TemplateParameterList; |
75 | class UsingDecl; |
76 | |
77 | /// Represents an access specifier followed by colon ':'. |
78 | /// |
79 | /// An objects of this class represents sugar for the syntactic occurrence |
80 | /// of an access specifier followed by a colon in the list of member |
81 | /// specifiers of a C++ class definition. |
82 | /// |
83 | /// Note that they do not represent other uses of access specifiers, |
84 | /// such as those occurring in a list of base specifiers. |
85 | /// Also note that this class has nothing to do with so-called |
86 | /// "access declarations" (C++98 11.3 [class.access.dcl]). |
87 | class AccessSpecDecl : public Decl { |
88 | /// The location of the ':'. |
89 | SourceLocation ColonLoc; |
90 | |
91 | AccessSpecDecl(AccessSpecifier AS, DeclContext *DC, |
92 | SourceLocation ASLoc, SourceLocation ColonLoc) |
93 | : Decl(AccessSpec, DC, ASLoc), ColonLoc(ColonLoc) { |
94 | setAccess(AS); |
95 | } |
96 | |
97 | AccessSpecDecl(EmptyShell Empty) : Decl(AccessSpec, Empty) {} |
98 | |
99 | virtual void anchor(); |
100 | |
101 | public: |
102 | /// The location of the access specifier. |
103 | SourceLocation getAccessSpecifierLoc() const { return getLocation(); } |
104 | |
105 | /// Sets the location of the access specifier. |
106 | void setAccessSpecifierLoc(SourceLocation ASLoc) { setLocation(ASLoc); } |
107 | |
108 | /// The location of the colon following the access specifier. |
109 | SourceLocation getColonLoc() const { return ColonLoc; } |
110 | |
111 | /// Sets the location of the colon. |
112 | void setColonLoc(SourceLocation CLoc) { ColonLoc = CLoc; } |
113 | |
114 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
115 | return SourceRange(getAccessSpecifierLoc(), getColonLoc()); |
116 | } |
117 | |
118 | static AccessSpecDecl *Create(ASTContext &C, AccessSpecifier AS, |
119 | DeclContext *DC, SourceLocation ASLoc, |
120 | SourceLocation ColonLoc) { |
121 | return new (C, DC) AccessSpecDecl(AS, DC, ASLoc, ColonLoc); |
122 | } |
123 | |
124 | static AccessSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
125 | |
126 | // Implement isa/cast/dyncast/etc. |
127 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
128 | static bool classofKind(Kind K) { return K == AccessSpec; } |
129 | }; |
130 | |
131 | /// Represents a base class of a C++ class. |
132 | /// |
133 | /// Each CXXBaseSpecifier represents a single, direct base class (or |
134 | /// struct) of a C++ class (or struct). It specifies the type of that |
135 | /// base class, whether it is a virtual or non-virtual base, and what |
136 | /// level of access (public, protected, private) is used for the |
137 | /// derivation. For example: |
138 | /// |
139 | /// \code |
140 | /// class A { }; |
141 | /// class B { }; |
142 | /// class C : public virtual A, protected B { }; |
143 | /// \endcode |
144 | /// |
145 | /// In this code, C will have two CXXBaseSpecifiers, one for "public |
146 | /// virtual A" and the other for "protected B". |
147 | class CXXBaseSpecifier { |
148 | /// The source code range that covers the full base |
149 | /// specifier, including the "virtual" (if present) and access |
150 | /// specifier (if present). |
151 | SourceRange Range; |
152 | |
153 | /// The source location of the ellipsis, if this is a pack |
154 | /// expansion. |
155 | SourceLocation EllipsisLoc; |
156 | |
157 | /// Whether this is a virtual base class or not. |
158 | unsigned Virtual : 1; |
159 | |
160 | /// Whether this is the base of a class (true) or of a struct (false). |
161 | /// |
162 | /// This determines the mapping from the access specifier as written in the |
163 | /// source code to the access specifier used for semantic analysis. |
164 | unsigned BaseOfClass : 1; |
165 | |
166 | /// Access specifier as written in the source code (may be AS_none). |
167 | /// |
168 | /// The actual type of data stored here is an AccessSpecifier, but we use |
169 | /// "unsigned" here to work around a VC++ bug. |
170 | unsigned Access : 2; |
171 | |
172 | /// Whether the class contains a using declaration |
173 | /// to inherit the named class's constructors. |
174 | unsigned InheritConstructors : 1; |
175 | |
176 | /// The type of the base class. |
177 | /// |
178 | /// This will be a class or struct (or a typedef of such). The source code |
179 | /// range does not include the \c virtual or the access specifier. |
180 | TypeSourceInfo *BaseTypeInfo; |
181 | |
182 | public: |
183 | CXXBaseSpecifier() = default; |
184 | CXXBaseSpecifier(SourceRange R, bool V, bool BC, AccessSpecifier A, |
185 | TypeSourceInfo *TInfo, SourceLocation EllipsisLoc) |
186 | : Range(R), EllipsisLoc(EllipsisLoc), Virtual(V), BaseOfClass(BC), |
187 | Access(A), InheritConstructors(false), BaseTypeInfo(TInfo) {} |
188 | |
189 | /// Retrieves the source range that contains the entire base specifier. |
190 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
191 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
192 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
193 | |
194 | /// Get the location at which the base class type was written. |
195 | SourceLocation getBaseTypeLoc() const LLVM_READONLY__attribute__((__pure__)) { |
196 | return BaseTypeInfo->getTypeLoc().getBeginLoc(); |
197 | } |
198 | |
199 | /// Determines whether the base class is a virtual base class (or not). |
200 | bool isVirtual() const { return Virtual; } |
201 | |
202 | /// Determine whether this base class is a base of a class declared |
203 | /// with the 'class' keyword (vs. one declared with the 'struct' keyword). |
204 | bool isBaseOfClass() const { return BaseOfClass; } |
205 | |
206 | /// Determine whether this base specifier is a pack expansion. |
207 | bool isPackExpansion() const { return EllipsisLoc.isValid(); } |
208 | |
209 | /// Determine whether this base class's constructors get inherited. |
210 | bool getInheritConstructors() const { return InheritConstructors; } |
211 | |
212 | /// Set that this base class's constructors should be inherited. |
213 | void setInheritConstructors(bool Inherit = true) { |
214 | InheritConstructors = Inherit; |
215 | } |
216 | |
217 | /// For a pack expansion, determine the location of the ellipsis. |
218 | SourceLocation getEllipsisLoc() const { |
219 | return EllipsisLoc; |
220 | } |
221 | |
222 | /// Returns the access specifier for this base specifier. |
223 | /// |
224 | /// This is the actual base specifier as used for semantic analysis, so |
225 | /// the result can never be AS_none. To retrieve the access specifier as |
226 | /// written in the source code, use getAccessSpecifierAsWritten(). |
227 | AccessSpecifier getAccessSpecifier() const { |
228 | if ((AccessSpecifier)Access == AS_none) |
229 | return BaseOfClass? AS_private : AS_public; |
230 | else |
231 | return (AccessSpecifier)Access; |
232 | } |
233 | |
234 | /// Retrieves the access specifier as written in the source code |
235 | /// (which may mean that no access specifier was explicitly written). |
236 | /// |
237 | /// Use getAccessSpecifier() to retrieve the access specifier for use in |
238 | /// semantic analysis. |
239 | AccessSpecifier getAccessSpecifierAsWritten() const { |
240 | return (AccessSpecifier)Access; |
241 | } |
242 | |
243 | /// Retrieves the type of the base class. |
244 | /// |
245 | /// This type will always be an unqualified class type. |
246 | QualType getType() const { |
247 | return BaseTypeInfo->getType().getUnqualifiedType(); |
248 | } |
249 | |
250 | /// Retrieves the type and source location of the base class. |
251 | TypeSourceInfo *getTypeSourceInfo() const { return BaseTypeInfo; } |
252 | }; |
253 | |
254 | /// Represents a C++ struct/union/class. |
255 | class CXXRecordDecl : public RecordDecl { |
256 | friend class ASTDeclReader; |
257 | friend class ASTDeclWriter; |
258 | friend class ASTNodeImporter; |
259 | friend class ASTReader; |
260 | friend class ASTRecordWriter; |
261 | friend class ASTWriter; |
262 | friend class DeclContext; |
263 | friend class LambdaExpr; |
264 | |
265 | friend void FunctionDecl::setPure(bool); |
266 | friend void TagDecl::startDefinition(); |
267 | |
268 | /// Values used in DefinitionData fields to represent special members. |
269 | enum SpecialMemberFlags { |
270 | SMF_DefaultConstructor = 0x1, |
271 | SMF_CopyConstructor = 0x2, |
272 | SMF_MoveConstructor = 0x4, |
273 | SMF_CopyAssignment = 0x8, |
274 | SMF_MoveAssignment = 0x10, |
275 | SMF_Destructor = 0x20, |
276 | SMF_All = 0x3f |
277 | }; |
278 | |
279 | struct DefinitionData { |
280 | #define FIELD(Name, Width, Merge) \ |
281 | unsigned Name : Width; |
282 | #include "CXXRecordDeclDefinitionBits.def" |
283 | |
284 | /// Whether this class describes a C++ lambda. |
285 | unsigned IsLambda : 1; |
286 | |
287 | /// Whether we are currently parsing base specifiers. |
288 | unsigned IsParsingBaseSpecifiers : 1; |
289 | |
290 | /// True when visible conversion functions are already computed |
291 | /// and are available. |
292 | unsigned ComputedVisibleConversions : 1; |
293 | |
294 | unsigned HasODRHash : 1; |
295 | |
296 | /// A hash of parts of the class to help in ODR checking. |
297 | unsigned ODRHash = 0; |
298 | |
299 | /// The number of base class specifiers in Bases. |
300 | unsigned NumBases = 0; |
301 | |
302 | /// The number of virtual base class specifiers in VBases. |
303 | unsigned NumVBases = 0; |
304 | |
305 | /// Base classes of this class. |
306 | /// |
307 | /// FIXME: This is wasted space for a union. |
308 | LazyCXXBaseSpecifiersPtr Bases; |
309 | |
310 | /// direct and indirect virtual base classes of this class. |
311 | LazyCXXBaseSpecifiersPtr VBases; |
312 | |
313 | /// The conversion functions of this C++ class (but not its |
314 | /// inherited conversion functions). |
315 | /// |
316 | /// Each of the entries in this overload set is a CXXConversionDecl. |
317 | LazyASTUnresolvedSet Conversions; |
318 | |
319 | /// The conversion functions of this C++ class and all those |
320 | /// inherited conversion functions that are visible in this class. |
321 | /// |
322 | /// Each of the entries in this overload set is a CXXConversionDecl or a |
323 | /// FunctionTemplateDecl. |
324 | LazyASTUnresolvedSet VisibleConversions; |
325 | |
326 | /// The declaration which defines this record. |
327 | CXXRecordDecl *Definition; |
328 | |
329 | /// The first friend declaration in this class, or null if there |
330 | /// aren't any. |
331 | /// |
332 | /// This is actually currently stored in reverse order. |
333 | LazyDeclPtr FirstFriend; |
334 | |
335 | DefinitionData(CXXRecordDecl *D); |
336 | |
337 | /// Retrieve the set of direct base classes. |
338 | CXXBaseSpecifier *getBases() const { |
339 | if (!Bases.isOffset()) |
340 | return Bases.get(nullptr); |
341 | return getBasesSlowCase(); |
342 | } |
343 | |
344 | /// Retrieve the set of virtual base classes. |
345 | CXXBaseSpecifier *getVBases() const { |
346 | if (!VBases.isOffset()) |
347 | return VBases.get(nullptr); |
348 | return getVBasesSlowCase(); |
349 | } |
350 | |
351 | ArrayRef<CXXBaseSpecifier> bases() const { |
352 | return llvm::makeArrayRef(getBases(), NumBases); |
353 | } |
354 | |
355 | ArrayRef<CXXBaseSpecifier> vbases() const { |
356 | return llvm::makeArrayRef(getVBases(), NumVBases); |
357 | } |
358 | |
359 | private: |
360 | CXXBaseSpecifier *getBasesSlowCase() const; |
361 | CXXBaseSpecifier *getVBasesSlowCase() const; |
362 | }; |
363 | |
364 | struct DefinitionData *DefinitionData; |
365 | |
366 | /// Describes a C++ closure type (generated by a lambda expression). |
367 | struct LambdaDefinitionData : public DefinitionData { |
368 | using Capture = LambdaCapture; |
369 | |
370 | /// Whether this lambda is known to be dependent, even if its |
371 | /// context isn't dependent. |
372 | /// |
373 | /// A lambda with a non-dependent context can be dependent if it occurs |
374 | /// within the default argument of a function template, because the |
375 | /// lambda will have been created with the enclosing context as its |
376 | /// declaration context, rather than function. This is an unfortunate |
377 | /// artifact of having to parse the default arguments before. |
378 | unsigned Dependent : 1; |
379 | |
380 | /// Whether this lambda is a generic lambda. |
381 | unsigned IsGenericLambda : 1; |
382 | |
383 | /// The Default Capture. |
384 | unsigned CaptureDefault : 2; |
385 | |
386 | /// The number of captures in this lambda is limited 2^NumCaptures. |
387 | unsigned NumCaptures : 15; |
388 | |
389 | /// The number of explicit captures in this lambda. |
390 | unsigned NumExplicitCaptures : 13; |
391 | |
392 | /// Has known `internal` linkage. |
393 | unsigned HasKnownInternalLinkage : 1; |
394 | |
395 | /// The number used to indicate this lambda expression for name |
396 | /// mangling in the Itanium C++ ABI. |
397 | unsigned ManglingNumber : 31; |
398 | |
399 | /// The declaration that provides context for this lambda, if the |
400 | /// actual DeclContext does not suffice. This is used for lambdas that |
401 | /// occur within default arguments of function parameters within the class |
402 | /// or within a data member initializer. |
403 | LazyDeclPtr ContextDecl; |
404 | |
405 | /// The list of captures, both explicit and implicit, for this |
406 | /// lambda. |
407 | Capture *Captures = nullptr; |
408 | |
409 | /// The type of the call method. |
410 | TypeSourceInfo *MethodTyInfo; |
411 | |
412 | LambdaDefinitionData(CXXRecordDecl *D, TypeSourceInfo *Info, bool Dependent, |
413 | bool IsGeneric, LambdaCaptureDefault CaptureDefault) |
414 | : DefinitionData(D), Dependent(Dependent), IsGenericLambda(IsGeneric), |
415 | CaptureDefault(CaptureDefault), NumCaptures(0), |
416 | NumExplicitCaptures(0), HasKnownInternalLinkage(0), ManglingNumber(0), |
417 | MethodTyInfo(Info) { |
418 | IsLambda = true; |
419 | |
420 | // C++1z [expr.prim.lambda]p4: |
421 | // This class type is not an aggregate type. |
422 | Aggregate = false; |
423 | PlainOldData = false; |
424 | } |
425 | }; |
426 | |
427 | struct DefinitionData *dataPtr() const { |
428 | // Complete the redecl chain (if necessary). |
429 | getMostRecentDecl(); |
430 | return DefinitionData; |
431 | } |
432 | |
433 | struct DefinitionData &data() const { |
434 | auto *DD = dataPtr(); |
435 | assert(DD && "queried property of class with no definition")(static_cast <bool> (DD && "queried property of class with no definition" ) ? void (0) : __assert_fail ("DD && \"queried property of class with no definition\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 435, __extension__ __PRETTY_FUNCTION__)); |
436 | return *DD; |
437 | } |
438 | |
439 | struct LambdaDefinitionData &getLambdaData() const { |
440 | // No update required: a merged definition cannot change any lambda |
441 | // properties. |
442 | auto *DD = DefinitionData; |
443 | assert(DD && DD->IsLambda && "queried lambda property of non-lambda class")(static_cast <bool> (DD && DD->IsLambda && "queried lambda property of non-lambda class") ? void (0) : __assert_fail ("DD && DD->IsLambda && \"queried lambda property of non-lambda class\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 443, __extension__ __PRETTY_FUNCTION__)); |
444 | return static_cast<LambdaDefinitionData&>(*DD); |
445 | } |
446 | |
447 | /// The template or declaration that this declaration |
448 | /// describes or was instantiated from, respectively. |
449 | /// |
450 | /// For non-templates, this value will be null. For record |
451 | /// declarations that describe a class template, this will be a |
452 | /// pointer to a ClassTemplateDecl. For member |
453 | /// classes of class template specializations, this will be the |
454 | /// MemberSpecializationInfo referring to the member class that was |
455 | /// instantiated or specialized. |
456 | llvm::PointerUnion<ClassTemplateDecl *, MemberSpecializationInfo *> |
457 | TemplateOrInstantiation; |
458 | |
459 | /// Called from setBases and addedMember to notify the class that a |
460 | /// direct or virtual base class or a member of class type has been added. |
461 | void addedClassSubobject(CXXRecordDecl *Base); |
462 | |
463 | /// Notify the class that member has been added. |
464 | /// |
465 | /// This routine helps maintain information about the class based on which |
466 | /// members have been added. It will be invoked by DeclContext::addDecl() |
467 | /// whenever a member is added to this record. |
468 | void addedMember(Decl *D); |
469 | |
470 | void markedVirtualFunctionPure(); |
471 | |
472 | /// Get the head of our list of friend declarations, possibly |
473 | /// deserializing the friends from an external AST source. |
474 | FriendDecl *getFirstFriend() const; |
475 | |
476 | /// Determine whether this class has an empty base class subobject of type X |
477 | /// or of one of the types that might be at offset 0 within X (per the C++ |
478 | /// "standard layout" rules). |
479 | bool hasSubobjectAtOffsetZeroOfEmptyBaseType(ASTContext &Ctx, |
480 | const CXXRecordDecl *X); |
481 | |
482 | protected: |
483 | CXXRecordDecl(Kind K, TagKind TK, const ASTContext &C, DeclContext *DC, |
484 | SourceLocation StartLoc, SourceLocation IdLoc, |
485 | IdentifierInfo *Id, CXXRecordDecl *PrevDecl); |
486 | |
487 | public: |
488 | /// Iterator that traverses the base classes of a class. |
489 | using base_class_iterator = CXXBaseSpecifier *; |
490 | |
491 | /// Iterator that traverses the base classes of a class. |
492 | using base_class_const_iterator = const CXXBaseSpecifier *; |
493 | |
494 | CXXRecordDecl *getCanonicalDecl() override { |
495 | return cast<CXXRecordDecl>(RecordDecl::getCanonicalDecl()); |
496 | } |
497 | |
498 | const CXXRecordDecl *getCanonicalDecl() const { |
499 | return const_cast<CXXRecordDecl*>(this)->getCanonicalDecl(); |
500 | } |
501 | |
502 | CXXRecordDecl *getPreviousDecl() { |
503 | return cast_or_null<CXXRecordDecl>( |
504 | static_cast<RecordDecl *>(this)->getPreviousDecl()); |
505 | } |
506 | |
507 | const CXXRecordDecl *getPreviousDecl() const { |
508 | return const_cast<CXXRecordDecl*>(this)->getPreviousDecl(); |
509 | } |
510 | |
511 | CXXRecordDecl *getMostRecentDecl() { |
512 | return cast<CXXRecordDecl>( |
513 | static_cast<RecordDecl *>(this)->getMostRecentDecl()); |
514 | } |
515 | |
516 | const CXXRecordDecl *getMostRecentDecl() const { |
517 | return const_cast<CXXRecordDecl*>(this)->getMostRecentDecl(); |
518 | } |
519 | |
520 | CXXRecordDecl *getMostRecentNonInjectedDecl() { |
521 | CXXRecordDecl *Recent = |
522 | static_cast<CXXRecordDecl *>(this)->getMostRecentDecl(); |
523 | while (Recent->isInjectedClassName()) { |
524 | // FIXME: Does injected class name need to be in the redeclarations chain? |
525 | assert(Recent->getPreviousDecl())(static_cast <bool> (Recent->getPreviousDecl()) ? void (0) : __assert_fail ("Recent->getPreviousDecl()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 525, __extension__ __PRETTY_FUNCTION__)); |
526 | Recent = Recent->getPreviousDecl(); |
527 | } |
528 | return Recent; |
529 | } |
530 | |
531 | const CXXRecordDecl *getMostRecentNonInjectedDecl() const { |
532 | return const_cast<CXXRecordDecl*>(this)->getMostRecentNonInjectedDecl(); |
533 | } |
534 | |
535 | CXXRecordDecl *getDefinition() const { |
536 | // We only need an update if we don't already know which |
537 | // declaration is the definition. |
538 | auto *DD = DefinitionData ? DefinitionData : dataPtr(); |
539 | return DD ? DD->Definition : nullptr; |
540 | } |
541 | |
542 | bool hasDefinition() const { return DefinitionData || dataPtr(); } |
543 | |
544 | static CXXRecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC, |
545 | SourceLocation StartLoc, SourceLocation IdLoc, |
546 | IdentifierInfo *Id, |
547 | CXXRecordDecl *PrevDecl = nullptr, |
548 | bool DelayTypeCreation = false); |
549 | static CXXRecordDecl *CreateLambda(const ASTContext &C, DeclContext *DC, |
550 | TypeSourceInfo *Info, SourceLocation Loc, |
551 | bool DependentLambda, bool IsGeneric, |
552 | LambdaCaptureDefault CaptureDefault); |
553 | static CXXRecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID); |
554 | |
555 | bool isDynamicClass() const { |
556 | return data().Polymorphic || data().NumVBases != 0; |
557 | } |
558 | |
559 | /// @returns true if class is dynamic or might be dynamic because the |
560 | /// definition is incomplete of dependent. |
561 | bool mayBeDynamicClass() const { |
562 | return !hasDefinition() || isDynamicClass() || hasAnyDependentBases(); |
563 | } |
564 | |
565 | /// @returns true if class is non dynamic or might be non dynamic because the |
566 | /// definition is incomplete of dependent. |
567 | bool mayBeNonDynamicClass() const { |
568 | return !hasDefinition() || !isDynamicClass() || hasAnyDependentBases(); |
569 | } |
570 | |
571 | void setIsParsingBaseSpecifiers() { data().IsParsingBaseSpecifiers = true; } |
572 | |
573 | bool isParsingBaseSpecifiers() const { |
574 | return data().IsParsingBaseSpecifiers; |
575 | } |
576 | |
577 | unsigned getODRHash() const; |
578 | |
579 | /// Sets the base classes of this struct or class. |
580 | void setBases(CXXBaseSpecifier const * const *Bases, unsigned NumBases); |
581 | |
582 | /// Retrieves the number of base classes of this class. |
583 | unsigned getNumBases() const { return data().NumBases; } |
584 | |
585 | using base_class_range = llvm::iterator_range<base_class_iterator>; |
586 | using base_class_const_range = |
587 | llvm::iterator_range<base_class_const_iterator>; |
588 | |
589 | base_class_range bases() { |
590 | return base_class_range(bases_begin(), bases_end()); |
591 | } |
592 | base_class_const_range bases() const { |
593 | return base_class_const_range(bases_begin(), bases_end()); |
594 | } |
595 | |
596 | base_class_iterator bases_begin() { return data().getBases(); } |
597 | base_class_const_iterator bases_begin() const { return data().getBases(); } |
598 | base_class_iterator bases_end() { return bases_begin() + data().NumBases; } |
599 | base_class_const_iterator bases_end() const { |
600 | return bases_begin() + data().NumBases; |
601 | } |
602 | |
603 | /// Retrieves the number of virtual base classes of this class. |
604 | unsigned getNumVBases() const { return data().NumVBases; } |
605 | |
606 | base_class_range vbases() { |
607 | return base_class_range(vbases_begin(), vbases_end()); |
608 | } |
609 | base_class_const_range vbases() const { |
610 | return base_class_const_range(vbases_begin(), vbases_end()); |
611 | } |
612 | |
613 | base_class_iterator vbases_begin() { return data().getVBases(); } |
614 | base_class_const_iterator vbases_begin() const { return data().getVBases(); } |
615 | base_class_iterator vbases_end() { return vbases_begin() + data().NumVBases; } |
616 | base_class_const_iterator vbases_end() const { |
617 | return vbases_begin() + data().NumVBases; |
618 | } |
619 | |
620 | /// Determine whether this class has any dependent base classes which |
621 | /// are not the current instantiation. |
622 | bool hasAnyDependentBases() const; |
623 | |
624 | /// Iterator access to method members. The method iterator visits |
625 | /// all method members of the class, including non-instance methods, |
626 | /// special methods, etc. |
627 | using method_iterator = specific_decl_iterator<CXXMethodDecl>; |
628 | using method_range = |
629 | llvm::iterator_range<specific_decl_iterator<CXXMethodDecl>>; |
630 | |
631 | method_range methods() const { |
632 | return method_range(method_begin(), method_end()); |
633 | } |
634 | |
635 | /// Method begin iterator. Iterates in the order the methods |
636 | /// were declared. |
637 | method_iterator method_begin() const { |
638 | return method_iterator(decls_begin()); |
639 | } |
640 | |
641 | /// Method past-the-end iterator. |
642 | method_iterator method_end() const { |
643 | return method_iterator(decls_end()); |
644 | } |
645 | |
646 | /// Iterator access to constructor members. |
647 | using ctor_iterator = specific_decl_iterator<CXXConstructorDecl>; |
648 | using ctor_range = |
649 | llvm::iterator_range<specific_decl_iterator<CXXConstructorDecl>>; |
650 | |
651 | ctor_range ctors() const { return ctor_range(ctor_begin(), ctor_end()); } |
652 | |
653 | ctor_iterator ctor_begin() const { |
654 | return ctor_iterator(decls_begin()); |
655 | } |
656 | |
657 | ctor_iterator ctor_end() const { |
658 | return ctor_iterator(decls_end()); |
659 | } |
660 | |
661 | /// An iterator over friend declarations. All of these are defined |
662 | /// in DeclFriend.h. |
663 | class friend_iterator; |
664 | using friend_range = llvm::iterator_range<friend_iterator>; |
665 | |
666 | friend_range friends() const; |
667 | friend_iterator friend_begin() const; |
668 | friend_iterator friend_end() const; |
669 | void pushFriendDecl(FriendDecl *FD); |
670 | |
671 | /// Determines whether this record has any friends. |
672 | bool hasFriends() const { |
673 | return data().FirstFriend.isValid(); |
674 | } |
675 | |
676 | /// \c true if a defaulted copy constructor for this class would be |
677 | /// deleted. |
678 | bool defaultedCopyConstructorIsDeleted() const { |
679 | assert((!needsOverloadResolutionForCopyConstructor() ||(static_cast <bool> ((!needsOverloadResolutionForCopyConstructor () || (data().DeclaredSpecialMembers & SMF_CopyConstructor )) && "this property has not yet been computed by Sema" ) ? void (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 681, __extension__ __PRETTY_FUNCTION__)) |
680 | (data().DeclaredSpecialMembers & SMF_CopyConstructor)) &&(static_cast <bool> ((!needsOverloadResolutionForCopyConstructor () || (data().DeclaredSpecialMembers & SMF_CopyConstructor )) && "this property has not yet been computed by Sema" ) ? void (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 681, __extension__ __PRETTY_FUNCTION__)) |
681 | "this property has not yet been computed by Sema")(static_cast <bool> ((!needsOverloadResolutionForCopyConstructor () || (data().DeclaredSpecialMembers & SMF_CopyConstructor )) && "this property has not yet been computed by Sema" ) ? void (0) : __assert_fail ("(!needsOverloadResolutionForCopyConstructor() || (data().DeclaredSpecialMembers & SMF_CopyConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 681, __extension__ __PRETTY_FUNCTION__)); |
682 | return data().DefaultedCopyConstructorIsDeleted; |
683 | } |
684 | |
685 | /// \c true if a defaulted move constructor for this class would be |
686 | /// deleted. |
687 | bool defaultedMoveConstructorIsDeleted() const { |
688 | assert((!needsOverloadResolutionForMoveConstructor() ||(static_cast <bool> ((!needsOverloadResolutionForMoveConstructor () || (data().DeclaredSpecialMembers & SMF_MoveConstructor )) && "this property has not yet been computed by Sema" ) ? void (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 690, __extension__ __PRETTY_FUNCTION__)) |
689 | (data().DeclaredSpecialMembers & SMF_MoveConstructor)) &&(static_cast <bool> ((!needsOverloadResolutionForMoveConstructor () || (data().DeclaredSpecialMembers & SMF_MoveConstructor )) && "this property has not yet been computed by Sema" ) ? void (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 690, __extension__ __PRETTY_FUNCTION__)) |
690 | "this property has not yet been computed by Sema")(static_cast <bool> ((!needsOverloadResolutionForMoveConstructor () || (data().DeclaredSpecialMembers & SMF_MoveConstructor )) && "this property has not yet been computed by Sema" ) ? void (0) : __assert_fail ("(!needsOverloadResolutionForMoveConstructor() || (data().DeclaredSpecialMembers & SMF_MoveConstructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 690, __extension__ __PRETTY_FUNCTION__)); |
691 | return data().DefaultedMoveConstructorIsDeleted; |
692 | } |
693 | |
694 | /// \c true if a defaulted destructor for this class would be deleted. |
695 | bool defaultedDestructorIsDeleted() const { |
696 | assert((!needsOverloadResolutionForDestructor() ||(static_cast <bool> ((!needsOverloadResolutionForDestructor () || (data().DeclaredSpecialMembers & SMF_Destructor)) && "this property has not yet been computed by Sema") ? void (0 ) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 698, __extension__ __PRETTY_FUNCTION__)) |
697 | (data().DeclaredSpecialMembers & SMF_Destructor)) &&(static_cast <bool> ((!needsOverloadResolutionForDestructor () || (data().DeclaredSpecialMembers & SMF_Destructor)) && "this property has not yet been computed by Sema") ? void (0 ) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 698, __extension__ __PRETTY_FUNCTION__)) |
698 | "this property has not yet been computed by Sema")(static_cast <bool> ((!needsOverloadResolutionForDestructor () || (data().DeclaredSpecialMembers & SMF_Destructor)) && "this property has not yet been computed by Sema") ? void (0 ) : __assert_fail ("(!needsOverloadResolutionForDestructor() || (data().DeclaredSpecialMembers & SMF_Destructor)) && \"this property has not yet been computed by Sema\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 698, __extension__ __PRETTY_FUNCTION__)); |
699 | return data().DefaultedDestructorIsDeleted; |
700 | } |
701 | |
702 | /// \c true if we know for sure that this class has a single, |
703 | /// accessible, unambiguous copy constructor that is not deleted. |
704 | bool hasSimpleCopyConstructor() const { |
705 | return !hasUserDeclaredCopyConstructor() && |
706 | !data().DefaultedCopyConstructorIsDeleted; |
707 | } |
708 | |
709 | /// \c true if we know for sure that this class has a single, |
710 | /// accessible, unambiguous move constructor that is not deleted. |
711 | bool hasSimpleMoveConstructor() const { |
712 | return !hasUserDeclaredMoveConstructor() && hasMoveConstructor() && |
713 | !data().DefaultedMoveConstructorIsDeleted; |
714 | } |
715 | |
716 | /// \c true if we know for sure that this class has a single, |
717 | /// accessible, unambiguous copy assignment operator that is not deleted. |
718 | bool hasSimpleCopyAssignment() const { |
719 | return !hasUserDeclaredCopyAssignment() && |
720 | !data().DefaultedCopyAssignmentIsDeleted; |
721 | } |
722 | |
723 | /// \c true if we know for sure that this class has a single, |
724 | /// accessible, unambiguous move assignment operator that is not deleted. |
725 | bool hasSimpleMoveAssignment() const { |
726 | return !hasUserDeclaredMoveAssignment() && hasMoveAssignment() && |
727 | !data().DefaultedMoveAssignmentIsDeleted; |
728 | } |
729 | |
730 | /// \c true if we know for sure that this class has an accessible |
731 | /// destructor that is not deleted. |
732 | bool hasSimpleDestructor() const { |
733 | return !hasUserDeclaredDestructor() && |
734 | !data().DefaultedDestructorIsDeleted; |
735 | } |
736 | |
737 | /// Determine whether this class has any default constructors. |
738 | bool hasDefaultConstructor() const { |
739 | return (data().DeclaredSpecialMembers & SMF_DefaultConstructor) || |
740 | needsImplicitDefaultConstructor(); |
741 | } |
742 | |
743 | /// Determine if we need to declare a default constructor for |
744 | /// this class. |
745 | /// |
746 | /// This value is used for lazy creation of default constructors. |
747 | bool needsImplicitDefaultConstructor() const { |
748 | return (!data().UserDeclaredConstructor && |
749 | !(data().DeclaredSpecialMembers & SMF_DefaultConstructor) && |
750 | (!isLambda() || lambdaIsDefaultConstructibleAndAssignable())) || |
751 | // FIXME: Proposed fix to core wording issue: if a class inherits |
752 | // a default constructor and doesn't explicitly declare one, one |
753 | // is declared implicitly. |
754 | (data().HasInheritedDefaultConstructor && |
755 | !(data().DeclaredSpecialMembers & SMF_DefaultConstructor)); |
756 | } |
757 | |
758 | /// Determine whether this class has any user-declared constructors. |
759 | /// |
760 | /// When true, a default constructor will not be implicitly declared. |
761 | bool hasUserDeclaredConstructor() const { |
762 | return data().UserDeclaredConstructor; |
763 | } |
764 | |
765 | /// Whether this class has a user-provided default constructor |
766 | /// per C++11. |
767 | bool hasUserProvidedDefaultConstructor() const { |
768 | return data().UserProvidedDefaultConstructor; |
769 | } |
770 | |
771 | /// Determine whether this class has a user-declared copy constructor. |
772 | /// |
773 | /// When false, a copy constructor will be implicitly declared. |
774 | bool hasUserDeclaredCopyConstructor() const { |
775 | return data().UserDeclaredSpecialMembers & SMF_CopyConstructor; |
776 | } |
777 | |
778 | /// Determine whether this class needs an implicit copy |
779 | /// constructor to be lazily declared. |
780 | bool needsImplicitCopyConstructor() const { |
781 | return !(data().DeclaredSpecialMembers & SMF_CopyConstructor); |
782 | } |
783 | |
784 | /// Determine whether we need to eagerly declare a defaulted copy |
785 | /// constructor for this class. |
786 | bool needsOverloadResolutionForCopyConstructor() const { |
787 | // C++17 [class.copy.ctor]p6: |
788 | // If the class definition declares a move constructor or move assignment |
789 | // operator, the implicitly declared copy constructor is defined as |
790 | // deleted. |
791 | // In MSVC mode, sometimes a declared move assignment does not delete an |
792 | // implicit copy constructor, so defer this choice to Sema. |
793 | if (data().UserDeclaredSpecialMembers & |
794 | (SMF_MoveConstructor | SMF_MoveAssignment)) |
795 | return true; |
796 | return data().NeedOverloadResolutionForCopyConstructor; |
797 | } |
798 | |
799 | /// Determine whether an implicit copy constructor for this type |
800 | /// would have a parameter with a const-qualified reference type. |
801 | bool implicitCopyConstructorHasConstParam() const { |
802 | return data().ImplicitCopyConstructorCanHaveConstParamForNonVBase && |
803 | (isAbstract() || |
804 | data().ImplicitCopyConstructorCanHaveConstParamForVBase); |
805 | } |
806 | |
807 | /// Determine whether this class has a copy constructor with |
808 | /// a parameter type which is a reference to a const-qualified type. |
809 | bool hasCopyConstructorWithConstParam() const { |
810 | return data().HasDeclaredCopyConstructorWithConstParam || |
811 | (needsImplicitCopyConstructor() && |
812 | implicitCopyConstructorHasConstParam()); |
813 | } |
814 | |
815 | /// Whether this class has a user-declared move constructor or |
816 | /// assignment operator. |
817 | /// |
818 | /// When false, a move constructor and assignment operator may be |
819 | /// implicitly declared. |
820 | bool hasUserDeclaredMoveOperation() const { |
821 | return data().UserDeclaredSpecialMembers & |
822 | (SMF_MoveConstructor | SMF_MoveAssignment); |
823 | } |
824 | |
825 | /// Determine whether this class has had a move constructor |
826 | /// declared by the user. |
827 | bool hasUserDeclaredMoveConstructor() const { |
828 | return data().UserDeclaredSpecialMembers & SMF_MoveConstructor; |
829 | } |
830 | |
831 | /// Determine whether this class has a move constructor. |
832 | bool hasMoveConstructor() const { |
833 | return (data().DeclaredSpecialMembers & SMF_MoveConstructor) || |
834 | needsImplicitMoveConstructor(); |
835 | } |
836 | |
837 | /// Set that we attempted to declare an implicit copy |
838 | /// constructor, but overload resolution failed so we deleted it. |
839 | void setImplicitCopyConstructorIsDeleted() { |
840 | assert((data().DefaultedCopyConstructorIsDeleted ||(static_cast <bool> ((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && "Copy constructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 842, __extension__ __PRETTY_FUNCTION__)) |
841 | needsOverloadResolutionForCopyConstructor()) &&(static_cast <bool> ((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && "Copy constructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 842, __extension__ __PRETTY_FUNCTION__)) |
842 | "Copy constructor should not be deleted")(static_cast <bool> ((data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && "Copy constructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedCopyConstructorIsDeleted || needsOverloadResolutionForCopyConstructor()) && \"Copy constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 842, __extension__ __PRETTY_FUNCTION__)); |
843 | data().DefaultedCopyConstructorIsDeleted = true; |
844 | } |
845 | |
846 | /// Set that we attempted to declare an implicit move |
847 | /// constructor, but overload resolution failed so we deleted it. |
848 | void setImplicitMoveConstructorIsDeleted() { |
849 | assert((data().DefaultedMoveConstructorIsDeleted ||(static_cast <bool> ((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && "move constructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 851, __extension__ __PRETTY_FUNCTION__)) |
850 | needsOverloadResolutionForMoveConstructor()) &&(static_cast <bool> ((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && "move constructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 851, __extension__ __PRETTY_FUNCTION__)) |
851 | "move constructor should not be deleted")(static_cast <bool> ((data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && "move constructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedMoveConstructorIsDeleted || needsOverloadResolutionForMoveConstructor()) && \"move constructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 851, __extension__ __PRETTY_FUNCTION__)); |
852 | data().DefaultedMoveConstructorIsDeleted = true; |
853 | } |
854 | |
855 | /// Set that we attempted to declare an implicit destructor, |
856 | /// but overload resolution failed so we deleted it. |
857 | void setImplicitDestructorIsDeleted() { |
858 | assert((data().DefaultedDestructorIsDeleted ||(static_cast <bool> ((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && "destructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 860, __extension__ __PRETTY_FUNCTION__)) |
859 | needsOverloadResolutionForDestructor()) &&(static_cast <bool> ((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && "destructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 860, __extension__ __PRETTY_FUNCTION__)) |
860 | "destructor should not be deleted")(static_cast <bool> ((data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && "destructor should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedDestructorIsDeleted || needsOverloadResolutionForDestructor()) && \"destructor should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 860, __extension__ __PRETTY_FUNCTION__)); |
861 | data().DefaultedDestructorIsDeleted = true; |
862 | } |
863 | |
864 | /// Determine whether this class should get an implicit move |
865 | /// constructor or if any existing special member function inhibits this. |
866 | bool needsImplicitMoveConstructor() const { |
867 | return !(data().DeclaredSpecialMembers & SMF_MoveConstructor) && |
868 | !hasUserDeclaredCopyConstructor() && |
869 | !hasUserDeclaredCopyAssignment() && |
870 | !hasUserDeclaredMoveAssignment() && |
871 | !hasUserDeclaredDestructor(); |
872 | } |
873 | |
874 | /// Determine whether we need to eagerly declare a defaulted move |
875 | /// constructor for this class. |
876 | bool needsOverloadResolutionForMoveConstructor() const { |
877 | return data().NeedOverloadResolutionForMoveConstructor; |
878 | } |
879 | |
880 | /// Determine whether this class has a user-declared copy assignment |
881 | /// operator. |
882 | /// |
883 | /// When false, a copy assignment operator will be implicitly declared. |
884 | bool hasUserDeclaredCopyAssignment() const { |
885 | return data().UserDeclaredSpecialMembers & SMF_CopyAssignment; |
886 | } |
887 | |
888 | /// Set that we attempted to declare an implicit copy assignment |
889 | /// operator, but overload resolution failed so we deleted it. |
890 | void setImplicitCopyAssignmentIsDeleted() { |
891 | assert((data().DefaultedCopyAssignmentIsDeleted ||(static_cast <bool> ((data().DefaultedCopyAssignmentIsDeleted || needsOverloadResolutionForCopyAssignment()) && "copy assignment should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedCopyAssignmentIsDeleted || needsOverloadResolutionForCopyAssignment()) && \"copy assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 893, __extension__ __PRETTY_FUNCTION__)) |
892 | needsOverloadResolutionForCopyAssignment()) &&(static_cast <bool> ((data().DefaultedCopyAssignmentIsDeleted || needsOverloadResolutionForCopyAssignment()) && "copy assignment should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedCopyAssignmentIsDeleted || needsOverloadResolutionForCopyAssignment()) && \"copy assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 893, __extension__ __PRETTY_FUNCTION__)) |
893 | "copy assignment should not be deleted")(static_cast <bool> ((data().DefaultedCopyAssignmentIsDeleted || needsOverloadResolutionForCopyAssignment()) && "copy assignment should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedCopyAssignmentIsDeleted || needsOverloadResolutionForCopyAssignment()) && \"copy assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 893, __extension__ __PRETTY_FUNCTION__)); |
894 | data().DefaultedCopyAssignmentIsDeleted = true; |
895 | } |
896 | |
897 | /// Determine whether this class needs an implicit copy |
898 | /// assignment operator to be lazily declared. |
899 | bool needsImplicitCopyAssignment() const { |
900 | return !(data().DeclaredSpecialMembers & SMF_CopyAssignment); |
901 | } |
902 | |
903 | /// Determine whether we need to eagerly declare a defaulted copy |
904 | /// assignment operator for this class. |
905 | bool needsOverloadResolutionForCopyAssignment() const { |
906 | // C++20 [class.copy.assign]p2: |
907 | // If the class definition declares a move constructor or move assignment |
908 | // operator, the implicitly declared copy assignment operator is defined |
909 | // as deleted. |
910 | // In MSVC mode, sometimes a declared move constructor does not delete an |
911 | // implicit copy assignment, so defer this choice to Sema. |
912 | if (data().UserDeclaredSpecialMembers & |
913 | (SMF_MoveConstructor | SMF_MoveAssignment)) |
914 | return true; |
915 | return data().NeedOverloadResolutionForCopyAssignment; |
916 | } |
917 | |
918 | /// Determine whether an implicit copy assignment operator for this |
919 | /// type would have a parameter with a const-qualified reference type. |
920 | bool implicitCopyAssignmentHasConstParam() const { |
921 | return data().ImplicitCopyAssignmentHasConstParam; |
922 | } |
923 | |
924 | /// Determine whether this class has a copy assignment operator with |
925 | /// a parameter type which is a reference to a const-qualified type or is not |
926 | /// a reference. |
927 | bool hasCopyAssignmentWithConstParam() const { |
928 | return data().HasDeclaredCopyAssignmentWithConstParam || |
929 | (needsImplicitCopyAssignment() && |
930 | implicitCopyAssignmentHasConstParam()); |
931 | } |
932 | |
933 | /// Determine whether this class has had a move assignment |
934 | /// declared by the user. |
935 | bool hasUserDeclaredMoveAssignment() const { |
936 | return data().UserDeclaredSpecialMembers & SMF_MoveAssignment; |
937 | } |
938 | |
939 | /// Determine whether this class has a move assignment operator. |
940 | bool hasMoveAssignment() const { |
941 | return (data().DeclaredSpecialMembers & SMF_MoveAssignment) || |
942 | needsImplicitMoveAssignment(); |
943 | } |
944 | |
945 | /// Set that we attempted to declare an implicit move assignment |
946 | /// operator, but overload resolution failed so we deleted it. |
947 | void setImplicitMoveAssignmentIsDeleted() { |
948 | assert((data().DefaultedMoveAssignmentIsDeleted ||(static_cast <bool> ((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && "move assignment should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 950, __extension__ __PRETTY_FUNCTION__)) |
949 | needsOverloadResolutionForMoveAssignment()) &&(static_cast <bool> ((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && "move assignment should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 950, __extension__ __PRETTY_FUNCTION__)) |
950 | "move assignment should not be deleted")(static_cast <bool> ((data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && "move assignment should not be deleted" ) ? void (0) : __assert_fail ("(data().DefaultedMoveAssignmentIsDeleted || needsOverloadResolutionForMoveAssignment()) && \"move assignment should not be deleted\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 950, __extension__ __PRETTY_FUNCTION__)); |
951 | data().DefaultedMoveAssignmentIsDeleted = true; |
952 | } |
953 | |
954 | /// Determine whether this class should get an implicit move |
955 | /// assignment operator or if any existing special member function inhibits |
956 | /// this. |
957 | bool needsImplicitMoveAssignment() const { |
958 | return !(data().DeclaredSpecialMembers & SMF_MoveAssignment) && |
959 | !hasUserDeclaredCopyConstructor() && |
960 | !hasUserDeclaredCopyAssignment() && |
961 | !hasUserDeclaredMoveConstructor() && |
962 | !hasUserDeclaredDestructor() && |
963 | (!isLambda() || lambdaIsDefaultConstructibleAndAssignable()); |
964 | } |
965 | |
966 | /// Determine whether we need to eagerly declare a move assignment |
967 | /// operator for this class. |
968 | bool needsOverloadResolutionForMoveAssignment() const { |
969 | return data().NeedOverloadResolutionForMoveAssignment; |
970 | } |
971 | |
972 | /// Determine whether this class has a user-declared destructor. |
973 | /// |
974 | /// When false, a destructor will be implicitly declared. |
975 | bool hasUserDeclaredDestructor() const { |
976 | return data().UserDeclaredSpecialMembers & SMF_Destructor; |
977 | } |
978 | |
979 | /// Determine whether this class needs an implicit destructor to |
980 | /// be lazily declared. |
981 | bool needsImplicitDestructor() const { |
982 | return !(data().DeclaredSpecialMembers & SMF_Destructor); |
983 | } |
984 | |
985 | /// Determine whether we need to eagerly declare a destructor for this |
986 | /// class. |
987 | bool needsOverloadResolutionForDestructor() const { |
988 | return data().NeedOverloadResolutionForDestructor; |
989 | } |
990 | |
991 | /// Determine whether this class describes a lambda function object. |
992 | bool isLambda() const { |
993 | // An update record can't turn a non-lambda into a lambda. |
994 | auto *DD = DefinitionData; |
995 | return DD && DD->IsLambda; |
996 | } |
997 | |
998 | /// Determine whether this class describes a generic |
999 | /// lambda function object (i.e. function call operator is |
1000 | /// a template). |
1001 | bool isGenericLambda() const; |
1002 | |
1003 | /// Determine whether this lambda should have an implicit default constructor |
1004 | /// and copy and move assignment operators. |
1005 | bool lambdaIsDefaultConstructibleAndAssignable() const; |
1006 | |
1007 | /// Retrieve the lambda call operator of the closure type |
1008 | /// if this is a closure type. |
1009 | CXXMethodDecl *getLambdaCallOperator() const; |
1010 | |
1011 | /// Retrieve the dependent lambda call operator of the closure type |
1012 | /// if this is a templated closure type. |
1013 | FunctionTemplateDecl *getDependentLambdaCallOperator() const; |
1014 | |
1015 | /// Retrieve the lambda static invoker, the address of which |
1016 | /// is returned by the conversion operator, and the body of which |
1017 | /// is forwarded to the lambda call operator. The version that does not |
1018 | /// take a calling convention uses the 'default' calling convention for free |
1019 | /// functions if the Lambda's calling convention was not modified via |
1020 | /// attribute. Otherwise, it will return the calling convention specified for |
1021 | /// the lambda. |
1022 | CXXMethodDecl *getLambdaStaticInvoker() const; |
1023 | CXXMethodDecl *getLambdaStaticInvoker(CallingConv CC) const; |
1024 | |
1025 | /// Retrieve the generic lambda's template parameter list. |
1026 | /// Returns null if the class does not represent a lambda or a generic |
1027 | /// lambda. |
1028 | TemplateParameterList *getGenericLambdaTemplateParameterList() const; |
1029 | |
1030 | /// Retrieve the lambda template parameters that were specified explicitly. |
1031 | ArrayRef<NamedDecl *> getLambdaExplicitTemplateParameters() const; |
1032 | |
1033 | LambdaCaptureDefault getLambdaCaptureDefault() const { |
1034 | assert(isLambda())(static_cast <bool> (isLambda()) ? void (0) : __assert_fail ("isLambda()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 1034, __extension__ __PRETTY_FUNCTION__)); |
1035 | return static_cast<LambdaCaptureDefault>(getLambdaData().CaptureDefault); |
1036 | } |
1037 | |
1038 | /// Set the captures for this lambda closure type. |
1039 | void setCaptures(ASTContext &Context, ArrayRef<LambdaCapture> Captures); |
1040 | |
1041 | /// For a closure type, retrieve the mapping from captured |
1042 | /// variables and \c this to the non-static data members that store the |
1043 | /// values or references of the captures. |
1044 | /// |
1045 | /// \param Captures Will be populated with the mapping from captured |
1046 | /// variables to the corresponding fields. |
1047 | /// |
1048 | /// \param ThisCapture Will be set to the field declaration for the |
1049 | /// \c this capture. |
1050 | /// |
1051 | /// \note No entries will be added for init-captures, as they do not capture |
1052 | /// variables. |
1053 | void getCaptureFields(llvm::DenseMap<const VarDecl *, FieldDecl *> &Captures, |
1054 | FieldDecl *&ThisCapture) const; |
1055 | |
1056 | using capture_const_iterator = const LambdaCapture *; |
1057 | using capture_const_range = llvm::iterator_range<capture_const_iterator>; |
1058 | |
1059 | capture_const_range captures() const { |
1060 | return capture_const_range(captures_begin(), captures_end()); |
1061 | } |
1062 | |
1063 | capture_const_iterator captures_begin() const { |
1064 | return isLambda() ? getLambdaData().Captures : nullptr; |
1065 | } |
1066 | |
1067 | capture_const_iterator captures_end() const { |
1068 | return isLambda() ? captures_begin() + getLambdaData().NumCaptures |
1069 | : nullptr; |
1070 | } |
1071 | |
1072 | unsigned capture_size() const { return getLambdaData().NumCaptures; } |
1073 | |
1074 | using conversion_iterator = UnresolvedSetIterator; |
1075 | |
1076 | conversion_iterator conversion_begin() const { |
1077 | return data().Conversions.get(getASTContext()).begin(); |
1078 | } |
1079 | |
1080 | conversion_iterator conversion_end() const { |
1081 | return data().Conversions.get(getASTContext()).end(); |
1082 | } |
1083 | |
1084 | /// Removes a conversion function from this class. The conversion |
1085 | /// function must currently be a member of this class. Furthermore, |
1086 | /// this class must currently be in the process of being defined. |
1087 | void removeConversion(const NamedDecl *Old); |
1088 | |
1089 | /// Get all conversion functions visible in current class, |
1090 | /// including conversion function templates. |
1091 | llvm::iterator_range<conversion_iterator> |
1092 | getVisibleConversionFunctions() const; |
1093 | |
1094 | /// Determine whether this class is an aggregate (C++ [dcl.init.aggr]), |
1095 | /// which is a class with no user-declared constructors, no private |
1096 | /// or protected non-static data members, no base classes, and no virtual |
1097 | /// functions (C++ [dcl.init.aggr]p1). |
1098 | bool isAggregate() const { return data().Aggregate; } |
1099 | |
1100 | /// Whether this class has any in-class initializers |
1101 | /// for non-static data members (including those in anonymous unions or |
1102 | /// structs). |
1103 | bool hasInClassInitializer() const { return data().HasInClassInitializer; } |
1104 | |
1105 | /// Whether this class or any of its subobjects has any members of |
1106 | /// reference type which would make value-initialization ill-formed. |
1107 | /// |
1108 | /// Per C++03 [dcl.init]p5: |
1109 | /// - if T is a non-union class type without a user-declared constructor, |
1110 | /// then every non-static data member and base-class component of T is |
1111 | /// value-initialized [...] A program that calls for [...] |
1112 | /// value-initialization of an entity of reference type is ill-formed. |
1113 | bool hasUninitializedReferenceMember() const { |
1114 | return !isUnion() && !hasUserDeclaredConstructor() && |
1115 | data().HasUninitializedReferenceMember; |
1116 | } |
1117 | |
1118 | /// Whether this class is a POD-type (C++ [class]p4) |
1119 | /// |
1120 | /// For purposes of this function a class is POD if it is an aggregate |
1121 | /// that has no non-static non-POD data members, no reference data |
1122 | /// members, no user-defined copy assignment operator and no |
1123 | /// user-defined destructor. |
1124 | /// |
1125 | /// Note that this is the C++ TR1 definition of POD. |
1126 | bool isPOD() const { return data().PlainOldData; } |
1127 | |
1128 | /// True if this class is C-like, without C++-specific features, e.g. |
1129 | /// it contains only public fields, no bases, tag kind is not 'class', etc. |
1130 | bool isCLike() const; |
1131 | |
1132 | /// Determine whether this is an empty class in the sense of |
1133 | /// (C++11 [meta.unary.prop]). |
1134 | /// |
1135 | /// The CXXRecordDecl is a class type, but not a union type, |
1136 | /// with no non-static data members other than bit-fields of length 0, |
1137 | /// no virtual member functions, no virtual base classes, |
1138 | /// and no base class B for which is_empty<B>::value is false. |
1139 | /// |
1140 | /// \note This does NOT include a check for union-ness. |
1141 | bool isEmpty() const { return data().Empty; } |
1142 | |
1143 | bool hasPrivateFields() const { |
1144 | return data().HasPrivateFields; |
1145 | } |
1146 | |
1147 | bool hasProtectedFields() const { |
1148 | return data().HasProtectedFields; |
1149 | } |
1150 | |
1151 | /// Determine whether this class has direct non-static data members. |
1152 | bool hasDirectFields() const { |
1153 | auto &D = data(); |
1154 | return D.HasPublicFields || D.HasProtectedFields || D.HasPrivateFields; |
1155 | } |
1156 | |
1157 | /// Whether this class is polymorphic (C++ [class.virtual]), |
1158 | /// which means that the class contains or inherits a virtual function. |
1159 | bool isPolymorphic() const { return data().Polymorphic; } |
1160 | |
1161 | /// Determine whether this class has a pure virtual function. |
1162 | /// |
1163 | /// The class is is abstract per (C++ [class.abstract]p2) if it declares |
1164 | /// a pure virtual function or inherits a pure virtual function that is |
1165 | /// not overridden. |
1166 | bool isAbstract() const { return data().Abstract; } |
1167 | |
1168 | /// Determine whether this class is standard-layout per |
1169 | /// C++ [class]p7. |
1170 | bool isStandardLayout() const { return data().IsStandardLayout; } |
1171 | |
1172 | /// Determine whether this class was standard-layout per |
1173 | /// C++11 [class]p7, specifically using the C++11 rules without any DRs. |
1174 | bool isCXX11StandardLayout() const { return data().IsCXX11StandardLayout; } |
1175 | |
1176 | /// Determine whether this class, or any of its class subobjects, |
1177 | /// contains a mutable field. |
1178 | bool hasMutableFields() const { return data().HasMutableFields; } |
1179 | |
1180 | /// Determine whether this class has any variant members. |
1181 | bool hasVariantMembers() const { return data().HasVariantMembers; } |
1182 | |
1183 | /// Determine whether this class has a trivial default constructor |
1184 | /// (C++11 [class.ctor]p5). |
1185 | bool hasTrivialDefaultConstructor() const { |
1186 | return hasDefaultConstructor() && |
1187 | (data().HasTrivialSpecialMembers & SMF_DefaultConstructor); |
1188 | } |
1189 | |
1190 | /// Determine whether this class has a non-trivial default constructor |
1191 | /// (C++11 [class.ctor]p5). |
1192 | bool hasNonTrivialDefaultConstructor() const { |
1193 | return (data().DeclaredNonTrivialSpecialMembers & SMF_DefaultConstructor) || |
1194 | (needsImplicitDefaultConstructor() && |
1195 | !(data().HasTrivialSpecialMembers & SMF_DefaultConstructor)); |
1196 | } |
1197 | |
1198 | /// Determine whether this class has at least one constexpr constructor |
1199 | /// other than the copy or move constructors. |
1200 | bool hasConstexprNonCopyMoveConstructor() const { |
1201 | return data().HasConstexprNonCopyMoveConstructor || |
1202 | (needsImplicitDefaultConstructor() && |
1203 | defaultedDefaultConstructorIsConstexpr()); |
1204 | } |
1205 | |
1206 | /// Determine whether a defaulted default constructor for this class |
1207 | /// would be constexpr. |
1208 | bool defaultedDefaultConstructorIsConstexpr() const { |
1209 | return data().DefaultedDefaultConstructorIsConstexpr && |
1210 | (!isUnion() || hasInClassInitializer() || !hasVariantMembers() || |
1211 | getLangOpts().CPlusPlus20); |
1212 | } |
1213 | |
1214 | /// Determine whether this class has a constexpr default constructor. |
1215 | bool hasConstexprDefaultConstructor() const { |
1216 | return data().HasConstexprDefaultConstructor || |
1217 | (needsImplicitDefaultConstructor() && |
1218 | defaultedDefaultConstructorIsConstexpr()); |
1219 | } |
1220 | |
1221 | /// Determine whether this class has a trivial copy constructor |
1222 | /// (C++ [class.copy]p6, C++11 [class.copy]p12) |
1223 | bool hasTrivialCopyConstructor() const { |
1224 | return data().HasTrivialSpecialMembers & SMF_CopyConstructor; |
1225 | } |
1226 | |
1227 | bool hasTrivialCopyConstructorForCall() const { |
1228 | return data().HasTrivialSpecialMembersForCall & SMF_CopyConstructor; |
1229 | } |
1230 | |
1231 | /// Determine whether this class has a non-trivial copy constructor |
1232 | /// (C++ [class.copy]p6, C++11 [class.copy]p12) |
1233 | bool hasNonTrivialCopyConstructor() const { |
1234 | return data().DeclaredNonTrivialSpecialMembers & SMF_CopyConstructor || |
1235 | !hasTrivialCopyConstructor(); |
1236 | } |
1237 | |
1238 | bool hasNonTrivialCopyConstructorForCall() const { |
1239 | return (data().DeclaredNonTrivialSpecialMembersForCall & |
1240 | SMF_CopyConstructor) || |
1241 | !hasTrivialCopyConstructorForCall(); |
1242 | } |
1243 | |
1244 | /// Determine whether this class has a trivial move constructor |
1245 | /// (C++11 [class.copy]p12) |
1246 | bool hasTrivialMoveConstructor() const { |
1247 | return hasMoveConstructor() && |
1248 | (data().HasTrivialSpecialMembers & SMF_MoveConstructor); |
1249 | } |
1250 | |
1251 | bool hasTrivialMoveConstructorForCall() const { |
1252 | return hasMoveConstructor() && |
1253 | (data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor); |
1254 | } |
1255 | |
1256 | /// Determine whether this class has a non-trivial move constructor |
1257 | /// (C++11 [class.copy]p12) |
1258 | bool hasNonTrivialMoveConstructor() const { |
1259 | return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveConstructor) || |
1260 | (needsImplicitMoveConstructor() && |
1261 | !(data().HasTrivialSpecialMembers & SMF_MoveConstructor)); |
1262 | } |
1263 | |
1264 | bool hasNonTrivialMoveConstructorForCall() const { |
1265 | return (data().DeclaredNonTrivialSpecialMembersForCall & |
1266 | SMF_MoveConstructor) || |
1267 | (needsImplicitMoveConstructor() && |
1268 | !(data().HasTrivialSpecialMembersForCall & SMF_MoveConstructor)); |
1269 | } |
1270 | |
1271 | /// Determine whether this class has a trivial copy assignment operator |
1272 | /// (C++ [class.copy]p11, C++11 [class.copy]p25) |
1273 | bool hasTrivialCopyAssignment() const { |
1274 | return data().HasTrivialSpecialMembers & SMF_CopyAssignment; |
1275 | } |
1276 | |
1277 | /// Determine whether this class has a non-trivial copy assignment |
1278 | /// operator (C++ [class.copy]p11, C++11 [class.copy]p25) |
1279 | bool hasNonTrivialCopyAssignment() const { |
1280 | return data().DeclaredNonTrivialSpecialMembers & SMF_CopyAssignment || |
1281 | !hasTrivialCopyAssignment(); |
1282 | } |
1283 | |
1284 | /// Determine whether this class has a trivial move assignment operator |
1285 | /// (C++11 [class.copy]p25) |
1286 | bool hasTrivialMoveAssignment() const { |
1287 | return hasMoveAssignment() && |
1288 | (data().HasTrivialSpecialMembers & SMF_MoveAssignment); |
1289 | } |
1290 | |
1291 | /// Determine whether this class has a non-trivial move assignment |
1292 | /// operator (C++11 [class.copy]p25) |
1293 | bool hasNonTrivialMoveAssignment() const { |
1294 | return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveAssignment) || |
1295 | (needsImplicitMoveAssignment() && |
1296 | !(data().HasTrivialSpecialMembers & SMF_MoveAssignment)); |
1297 | } |
1298 | |
1299 | /// Determine whether a defaulted default constructor for this class |
1300 | /// would be constexpr. |
1301 | bool defaultedDestructorIsConstexpr() const { |
1302 | return data().DefaultedDestructorIsConstexpr && |
1303 | getLangOpts().CPlusPlus20; |
1304 | } |
1305 | |
1306 | /// Determine whether this class has a constexpr destructor. |
1307 | bool hasConstexprDestructor() const; |
1308 | |
1309 | /// Determine whether this class has a trivial destructor |
1310 | /// (C++ [class.dtor]p3) |
1311 | bool hasTrivialDestructor() const { |
1312 | return data().HasTrivialSpecialMembers & SMF_Destructor; |
1313 | } |
1314 | |
1315 | bool hasTrivialDestructorForCall() const { |
1316 | return data().HasTrivialSpecialMembersForCall & SMF_Destructor; |
1317 | } |
1318 | |
1319 | /// Determine whether this class has a non-trivial destructor |
1320 | /// (C++ [class.dtor]p3) |
1321 | bool hasNonTrivialDestructor() const { |
1322 | return !(data().HasTrivialSpecialMembers & SMF_Destructor); |
1323 | } |
1324 | |
1325 | bool hasNonTrivialDestructorForCall() const { |
1326 | return !(data().HasTrivialSpecialMembersForCall & SMF_Destructor); |
1327 | } |
1328 | |
1329 | void setHasTrivialSpecialMemberForCall() { |
1330 | data().HasTrivialSpecialMembersForCall = |
1331 | (SMF_CopyConstructor | SMF_MoveConstructor | SMF_Destructor); |
1332 | } |
1333 | |
1334 | /// Determine whether declaring a const variable with this type is ok |
1335 | /// per core issue 253. |
1336 | bool allowConstDefaultInit() const { |
1337 | return !data().HasUninitializedFields || |
1338 | !(data().HasDefaultedDefaultConstructor || |
1339 | needsImplicitDefaultConstructor()); |
1340 | } |
1341 | |
1342 | /// Determine whether this class has a destructor which has no |
1343 | /// semantic effect. |
1344 | /// |
1345 | /// Any such destructor will be trivial, public, defaulted and not deleted, |
1346 | /// and will call only irrelevant destructors. |
1347 | bool hasIrrelevantDestructor() const { |
1348 | return data().HasIrrelevantDestructor; |
1349 | } |
1350 | |
1351 | /// Determine whether this class has a non-literal or/ volatile type |
1352 | /// non-static data member or base class. |
1353 | bool hasNonLiteralTypeFieldsOrBases() const { |
1354 | return data().HasNonLiteralTypeFieldsOrBases; |
1355 | } |
1356 | |
1357 | /// Determine whether this class has a using-declaration that names |
1358 | /// a user-declared base class constructor. |
1359 | bool hasInheritedConstructor() const { |
1360 | return data().HasInheritedConstructor; |
1361 | } |
1362 | |
1363 | /// Determine whether this class has a using-declaration that names |
1364 | /// a base class assignment operator. |
1365 | bool hasInheritedAssignment() const { |
1366 | return data().HasInheritedAssignment; |
1367 | } |
1368 | |
1369 | /// Determine whether this class is considered trivially copyable per |
1370 | /// (C++11 [class]p6). |
1371 | bool isTriviallyCopyable() const; |
1372 | |
1373 | /// Determine whether this class is considered trivial. |
1374 | /// |
1375 | /// C++11 [class]p6: |
1376 | /// "A trivial class is a class that has a trivial default constructor and |
1377 | /// is trivially copyable." |
1378 | bool isTrivial() const { |
1379 | return isTriviallyCopyable() && hasTrivialDefaultConstructor(); |
1380 | } |
1381 | |
1382 | /// Determine whether this class is a literal type. |
1383 | /// |
1384 | /// C++11 [basic.types]p10: |
1385 | /// A class type that has all the following properties: |
1386 | /// - it has a trivial destructor |
1387 | /// - every constructor call and full-expression in the |
1388 | /// brace-or-equal-intializers for non-static data members (if any) is |
1389 | /// a constant expression. |
1390 | /// - it is an aggregate type or has at least one constexpr constructor |
1391 | /// or constructor template that is not a copy or move constructor, and |
1392 | /// - all of its non-static data members and base classes are of literal |
1393 | /// types |
1394 | /// |
1395 | /// We resolve DR1361 by ignoring the second bullet. We resolve DR1452 by |
1396 | /// treating types with trivial default constructors as literal types. |
1397 | /// |
1398 | /// Only in C++17 and beyond, are lambdas literal types. |
1399 | bool isLiteral() const { |
1400 | const LangOptions &LangOpts = getLangOpts(); |
1401 | return (LangOpts.CPlusPlus20 ? hasConstexprDestructor() |
1402 | : hasTrivialDestructor()) && |
1403 | (!isLambda() || LangOpts.CPlusPlus17) && |
1404 | !hasNonLiteralTypeFieldsOrBases() && |
1405 | (isAggregate() || isLambda() || |
1406 | hasConstexprNonCopyMoveConstructor() || |
1407 | hasTrivialDefaultConstructor()); |
1408 | } |
1409 | |
1410 | /// Determine whether this is a structural type. |
1411 | bool isStructural() const { |
1412 | return isLiteral() && data().StructuralIfLiteral; |
1413 | } |
1414 | |
1415 | /// If this record is an instantiation of a member class, |
1416 | /// retrieves the member class from which it was instantiated. |
1417 | /// |
1418 | /// This routine will return non-null for (non-templated) member |
1419 | /// classes of class templates. For example, given: |
1420 | /// |
1421 | /// \code |
1422 | /// template<typename T> |
1423 | /// struct X { |
1424 | /// struct A { }; |
1425 | /// }; |
1426 | /// \endcode |
1427 | /// |
1428 | /// The declaration for X<int>::A is a (non-templated) CXXRecordDecl |
1429 | /// whose parent is the class template specialization X<int>. For |
1430 | /// this declaration, getInstantiatedFromMemberClass() will return |
1431 | /// the CXXRecordDecl X<T>::A. When a complete definition of |
1432 | /// X<int>::A is required, it will be instantiated from the |
1433 | /// declaration returned by getInstantiatedFromMemberClass(). |
1434 | CXXRecordDecl *getInstantiatedFromMemberClass() const; |
1435 | |
1436 | /// If this class is an instantiation of a member class of a |
1437 | /// class template specialization, retrieves the member specialization |
1438 | /// information. |
1439 | MemberSpecializationInfo *getMemberSpecializationInfo() const; |
1440 | |
1441 | /// Specify that this record is an instantiation of the |
1442 | /// member class \p RD. |
1443 | void setInstantiationOfMemberClass(CXXRecordDecl *RD, |
1444 | TemplateSpecializationKind TSK); |
1445 | |
1446 | /// Retrieves the class template that is described by this |
1447 | /// class declaration. |
1448 | /// |
1449 | /// Every class template is represented as a ClassTemplateDecl and a |
1450 | /// CXXRecordDecl. The former contains template properties (such as |
1451 | /// the template parameter lists) while the latter contains the |
1452 | /// actual description of the template's |
1453 | /// contents. ClassTemplateDecl::getTemplatedDecl() retrieves the |
1454 | /// CXXRecordDecl that from a ClassTemplateDecl, while |
1455 | /// getDescribedClassTemplate() retrieves the ClassTemplateDecl from |
1456 | /// a CXXRecordDecl. |
1457 | ClassTemplateDecl *getDescribedClassTemplate() const; |
1458 | |
1459 | void setDescribedClassTemplate(ClassTemplateDecl *Template); |
1460 | |
1461 | /// Determine whether this particular class is a specialization or |
1462 | /// instantiation of a class template or member class of a class template, |
1463 | /// and how it was instantiated or specialized. |
1464 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
1465 | |
1466 | /// Set the kind of specialization or template instantiation this is. |
1467 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK); |
1468 | |
1469 | /// Retrieve the record declaration from which this record could be |
1470 | /// instantiated. Returns null if this class is not a template instantiation. |
1471 | const CXXRecordDecl *getTemplateInstantiationPattern() const; |
1472 | |
1473 | CXXRecordDecl *getTemplateInstantiationPattern() { |
1474 | return const_cast<CXXRecordDecl *>(const_cast<const CXXRecordDecl *>(this) |
1475 | ->getTemplateInstantiationPattern()); |
1476 | } |
1477 | |
1478 | /// Returns the destructor decl for this class. |
1479 | CXXDestructorDecl *getDestructor() const; |
1480 | |
1481 | /// Returns true if the class destructor, or any implicitly invoked |
1482 | /// destructors are marked noreturn. |
1483 | bool isAnyDestructorNoReturn() const { return data().IsAnyDestructorNoReturn; } |
1484 | |
1485 | /// If the class is a local class [class.local], returns |
1486 | /// the enclosing function declaration. |
1487 | const FunctionDecl *isLocalClass() const { |
1488 | if (const auto *RD = dyn_cast<CXXRecordDecl>(getDeclContext())) |
1489 | return RD->isLocalClass(); |
1490 | |
1491 | return dyn_cast<FunctionDecl>(getDeclContext()); |
1492 | } |
1493 | |
1494 | FunctionDecl *isLocalClass() { |
1495 | return const_cast<FunctionDecl*>( |
1496 | const_cast<const CXXRecordDecl*>(this)->isLocalClass()); |
1497 | } |
1498 | |
1499 | /// Determine whether this dependent class is a current instantiation, |
1500 | /// when viewed from within the given context. |
1501 | bool isCurrentInstantiation(const DeclContext *CurContext) const; |
1502 | |
1503 | /// Determine whether this class is derived from the class \p Base. |
1504 | /// |
1505 | /// This routine only determines whether this class is derived from \p Base, |
1506 | /// but does not account for factors that may make a Derived -> Base class |
1507 | /// ill-formed, such as private/protected inheritance or multiple, ambiguous |
1508 | /// base class subobjects. |
1509 | /// |
1510 | /// \param Base the base class we are searching for. |
1511 | /// |
1512 | /// \returns true if this class is derived from Base, false otherwise. |
1513 | bool isDerivedFrom(const CXXRecordDecl *Base) const; |
1514 | |
1515 | /// Determine whether this class is derived from the type \p Base. |
1516 | /// |
1517 | /// This routine only determines whether this class is derived from \p Base, |
1518 | /// but does not account for factors that may make a Derived -> Base class |
1519 | /// ill-formed, such as private/protected inheritance or multiple, ambiguous |
1520 | /// base class subobjects. |
1521 | /// |
1522 | /// \param Base the base class we are searching for. |
1523 | /// |
1524 | /// \param Paths will contain the paths taken from the current class to the |
1525 | /// given \p Base class. |
1526 | /// |
1527 | /// \returns true if this class is derived from \p Base, false otherwise. |
1528 | /// |
1529 | /// \todo add a separate parameter to configure IsDerivedFrom, rather than |
1530 | /// tangling input and output in \p Paths |
1531 | bool isDerivedFrom(const CXXRecordDecl *Base, CXXBasePaths &Paths) const; |
1532 | |
1533 | /// Determine whether this class is virtually derived from |
1534 | /// the class \p Base. |
1535 | /// |
1536 | /// This routine only determines whether this class is virtually |
1537 | /// derived from \p Base, but does not account for factors that may |
1538 | /// make a Derived -> Base class ill-formed, such as |
1539 | /// private/protected inheritance or multiple, ambiguous base class |
1540 | /// subobjects. |
1541 | /// |
1542 | /// \param Base the base class we are searching for. |
1543 | /// |
1544 | /// \returns true if this class is virtually derived from Base, |
1545 | /// false otherwise. |
1546 | bool isVirtuallyDerivedFrom(const CXXRecordDecl *Base) const; |
1547 | |
1548 | /// Determine whether this class is provably not derived from |
1549 | /// the type \p Base. |
1550 | bool isProvablyNotDerivedFrom(const CXXRecordDecl *Base) const; |
1551 | |
1552 | /// Function type used by forallBases() as a callback. |
1553 | /// |
1554 | /// \param BaseDefinition the definition of the base class |
1555 | /// |
1556 | /// \returns true if this base matched the search criteria |
1557 | using ForallBasesCallback = |
1558 | llvm::function_ref<bool(const CXXRecordDecl *BaseDefinition)>; |
1559 | |
1560 | /// Determines if the given callback holds for all the direct |
1561 | /// or indirect base classes of this type. |
1562 | /// |
1563 | /// The class itself does not count as a base class. This routine |
1564 | /// returns false if the class has non-computable base classes. |
1565 | /// |
1566 | /// \param BaseMatches Callback invoked for each (direct or indirect) base |
1567 | /// class of this type until a call returns false. |
1568 | bool forallBases(ForallBasesCallback BaseMatches) const; |
1569 | |
1570 | /// Function type used by lookupInBases() to determine whether a |
1571 | /// specific base class subobject matches the lookup criteria. |
1572 | /// |
1573 | /// \param Specifier the base-class specifier that describes the inheritance |
1574 | /// from the base class we are trying to match. |
1575 | /// |
1576 | /// \param Path the current path, from the most-derived class down to the |
1577 | /// base named by the \p Specifier. |
1578 | /// |
1579 | /// \returns true if this base matched the search criteria, false otherwise. |
1580 | using BaseMatchesCallback = |
1581 | llvm::function_ref<bool(const CXXBaseSpecifier *Specifier, |
1582 | CXXBasePath &Path)>; |
1583 | |
1584 | /// Look for entities within the base classes of this C++ class, |
1585 | /// transitively searching all base class subobjects. |
1586 | /// |
1587 | /// This routine uses the callback function \p BaseMatches to find base |
1588 | /// classes meeting some search criteria, walking all base class subobjects |
1589 | /// and populating the given \p Paths structure with the paths through the |
1590 | /// inheritance hierarchy that resulted in a match. On a successful search, |
1591 | /// the \p Paths structure can be queried to retrieve the matching paths and |
1592 | /// to determine if there were any ambiguities. |
1593 | /// |
1594 | /// \param BaseMatches callback function used to determine whether a given |
1595 | /// base matches the user-defined search criteria. |
1596 | /// |
1597 | /// \param Paths used to record the paths from this class to its base class |
1598 | /// subobjects that match the search criteria. |
1599 | /// |
1600 | /// \param LookupInDependent can be set to true to extend the search to |
1601 | /// dependent base classes. |
1602 | /// |
1603 | /// \returns true if there exists any path from this class to a base class |
1604 | /// subobject that matches the search criteria. |
1605 | bool lookupInBases(BaseMatchesCallback BaseMatches, CXXBasePaths &Paths, |
1606 | bool LookupInDependent = false) const; |
1607 | |
1608 | /// Base-class lookup callback that determines whether the given |
1609 | /// base class specifier refers to a specific class declaration. |
1610 | /// |
1611 | /// This callback can be used with \c lookupInBases() to determine whether |
1612 | /// a given derived class has is a base class subobject of a particular type. |
1613 | /// The base record pointer should refer to the canonical CXXRecordDecl of the |
1614 | /// base class that we are searching for. |
1615 | static bool FindBaseClass(const CXXBaseSpecifier *Specifier, |
1616 | CXXBasePath &Path, const CXXRecordDecl *BaseRecord); |
1617 | |
1618 | /// Base-class lookup callback that determines whether the |
1619 | /// given base class specifier refers to a specific class |
1620 | /// declaration and describes virtual derivation. |
1621 | /// |
1622 | /// This callback can be used with \c lookupInBases() to determine |
1623 | /// whether a given derived class has is a virtual base class |
1624 | /// subobject of a particular type. The base record pointer should |
1625 | /// refer to the canonical CXXRecordDecl of the base class that we |
1626 | /// are searching for. |
1627 | static bool FindVirtualBaseClass(const CXXBaseSpecifier *Specifier, |
1628 | CXXBasePath &Path, |
1629 | const CXXRecordDecl *BaseRecord); |
1630 | |
1631 | /// Retrieve the final overriders for each virtual member |
1632 | /// function in the class hierarchy where this class is the |
1633 | /// most-derived class in the class hierarchy. |
1634 | void getFinalOverriders(CXXFinalOverriderMap &FinaOverriders) const; |
1635 | |
1636 | /// Get the indirect primary bases for this class. |
1637 | void getIndirectPrimaryBases(CXXIndirectPrimaryBaseSet& Bases) const; |
1638 | |
1639 | /// Determine whether this class has a member with the given name, possibly |
1640 | /// in a non-dependent base class. |
1641 | /// |
1642 | /// No check for ambiguity is performed, so this should never be used when |
1643 | /// implementing language semantics, but it may be appropriate for warnings, |
1644 | /// static analysis, or similar. |
1645 | bool hasMemberName(DeclarationName N) const; |
1646 | |
1647 | /// Performs an imprecise lookup of a dependent name in this class. |
1648 | /// |
1649 | /// This function does not follow strict semantic rules and should be used |
1650 | /// only when lookup rules can be relaxed, e.g. indexing. |
1651 | std::vector<const NamedDecl *> |
1652 | lookupDependentName(DeclarationName Name, |
1653 | llvm::function_ref<bool(const NamedDecl *ND)> Filter); |
1654 | |
1655 | /// Renders and displays an inheritance diagram |
1656 | /// for this C++ class and all of its base classes (transitively) using |
1657 | /// GraphViz. |
1658 | void viewInheritance(ASTContext& Context) const; |
1659 | |
1660 | /// Calculates the access of a decl that is reached |
1661 | /// along a path. |
1662 | static AccessSpecifier MergeAccess(AccessSpecifier PathAccess, |
1663 | AccessSpecifier DeclAccess) { |
1664 | assert(DeclAccess != AS_none)(static_cast <bool> (DeclAccess != AS_none) ? void (0) : __assert_fail ("DeclAccess != AS_none", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 1664, __extension__ __PRETTY_FUNCTION__)); |
1665 | if (DeclAccess == AS_private) return AS_none; |
1666 | return (PathAccess > DeclAccess ? PathAccess : DeclAccess); |
1667 | } |
1668 | |
1669 | /// Indicates that the declaration of a defaulted or deleted special |
1670 | /// member function is now complete. |
1671 | void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD); |
1672 | |
1673 | void setTrivialForCallFlags(CXXMethodDecl *MD); |
1674 | |
1675 | /// Indicates that the definition of this class is now complete. |
1676 | void completeDefinition() override; |
1677 | |
1678 | /// Indicates that the definition of this class is now complete, |
1679 | /// and provides a final overrider map to help determine |
1680 | /// |
1681 | /// \param FinalOverriders The final overrider map for this class, which can |
1682 | /// be provided as an optimization for abstract-class checking. If NULL, |
1683 | /// final overriders will be computed if they are needed to complete the |
1684 | /// definition. |
1685 | void completeDefinition(CXXFinalOverriderMap *FinalOverriders); |
1686 | |
1687 | /// Determine whether this class may end up being abstract, even though |
1688 | /// it is not yet known to be abstract. |
1689 | /// |
1690 | /// \returns true if this class is not known to be abstract but has any |
1691 | /// base classes that are abstract. In this case, \c completeDefinition() |
1692 | /// will need to compute final overriders to determine whether the class is |
1693 | /// actually abstract. |
1694 | bool mayBeAbstract() const; |
1695 | |
1696 | /// Determine whether it's impossible for a class to be derived from this |
1697 | /// class. This is best-effort, and may conservatively return false. |
1698 | bool isEffectivelyFinal() const; |
1699 | |
1700 | /// If this is the closure type of a lambda expression, retrieve the |
1701 | /// number to be used for name mangling in the Itanium C++ ABI. |
1702 | /// |
1703 | /// Zero indicates that this closure type has internal linkage, so the |
1704 | /// mangling number does not matter, while a non-zero value indicates which |
1705 | /// lambda expression this is in this particular context. |
1706 | unsigned getLambdaManglingNumber() const { |
1707 | assert(isLambda() && "Not a lambda closure type!")(static_cast <bool> (isLambda() && "Not a lambda closure type!" ) ? void (0) : __assert_fail ("isLambda() && \"Not a lambda closure type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 1707, __extension__ __PRETTY_FUNCTION__)); |
1708 | return getLambdaData().ManglingNumber; |
1709 | } |
1710 | |
1711 | /// The lambda is known to has internal linkage no matter whether it has name |
1712 | /// mangling number. |
1713 | bool hasKnownLambdaInternalLinkage() const { |
1714 | assert(isLambda() && "Not a lambda closure type!")(static_cast <bool> (isLambda() && "Not a lambda closure type!" ) ? void (0) : __assert_fail ("isLambda() && \"Not a lambda closure type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 1714, __extension__ __PRETTY_FUNCTION__)); |
1715 | return getLambdaData().HasKnownInternalLinkage; |
1716 | } |
1717 | |
1718 | /// Retrieve the declaration that provides additional context for a |
1719 | /// lambda, when the normal declaration context is not specific enough. |
1720 | /// |
1721 | /// Certain contexts (default arguments of in-class function parameters and |
1722 | /// the initializers of data members) have separate name mangling rules for |
1723 | /// lambdas within the Itanium C++ ABI. For these cases, this routine provides |
1724 | /// the declaration in which the lambda occurs, e.g., the function parameter |
1725 | /// or the non-static data member. Otherwise, it returns NULL to imply that |
1726 | /// the declaration context suffices. |
1727 | Decl *getLambdaContextDecl() const; |
1728 | |
1729 | /// Set the mangling number and context declaration for a lambda |
1730 | /// class. |
1731 | void setLambdaMangling(unsigned ManglingNumber, Decl *ContextDecl, |
1732 | bool HasKnownInternalLinkage = false) { |
1733 | assert(isLambda() && "Not a lambda closure type!")(static_cast <bool> (isLambda() && "Not a lambda closure type!" ) ? void (0) : __assert_fail ("isLambda() && \"Not a lambda closure type!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 1733, __extension__ __PRETTY_FUNCTION__)); |
1734 | getLambdaData().ManglingNumber = ManglingNumber; |
1735 | getLambdaData().ContextDecl = ContextDecl; |
1736 | getLambdaData().HasKnownInternalLinkage = HasKnownInternalLinkage; |
1737 | } |
1738 | |
1739 | /// Set the device side mangling number. |
1740 | void setDeviceLambdaManglingNumber(unsigned Num) const; |
1741 | |
1742 | /// Retrieve the device side mangling number. |
1743 | unsigned getDeviceLambdaManglingNumber() const; |
1744 | |
1745 | /// Returns the inheritance model used for this record. |
1746 | MSInheritanceModel getMSInheritanceModel() const; |
1747 | |
1748 | /// Calculate what the inheritance model would be for this class. |
1749 | MSInheritanceModel calculateInheritanceModel() const; |
1750 | |
1751 | /// In the Microsoft C++ ABI, use zero for the field offset of a null data |
1752 | /// member pointer if we can guarantee that zero is not a valid field offset, |
1753 | /// or if the member pointer has multiple fields. Polymorphic classes have a |
1754 | /// vfptr at offset zero, so we can use zero for null. If there are multiple |
1755 | /// fields, we can use zero even if it is a valid field offset because |
1756 | /// null-ness testing will check the other fields. |
1757 | bool nullFieldOffsetIsZero() const; |
1758 | |
1759 | /// Controls when vtordisps will be emitted if this record is used as a |
1760 | /// virtual base. |
1761 | MSVtorDispMode getMSVtorDispMode() const; |
1762 | |
1763 | /// Determine whether this lambda expression was known to be dependent |
1764 | /// at the time it was created, even if its context does not appear to be |
1765 | /// dependent. |
1766 | /// |
1767 | /// This flag is a workaround for an issue with parsing, where default |
1768 | /// arguments are parsed before their enclosing function declarations have |
1769 | /// been created. This means that any lambda expressions within those |
1770 | /// default arguments will have as their DeclContext the context enclosing |
1771 | /// the function declaration, which may be non-dependent even when the |
1772 | /// function declaration itself is dependent. This flag indicates when we |
1773 | /// know that the lambda is dependent despite that. |
1774 | bool isDependentLambda() const { |
1775 | return isLambda() && getLambdaData().Dependent; |
1776 | } |
1777 | |
1778 | TypeSourceInfo *getLambdaTypeInfo() const { |
1779 | return getLambdaData().MethodTyInfo; |
1780 | } |
1781 | |
1782 | // Determine whether this type is an Interface Like type for |
1783 | // __interface inheritance purposes. |
1784 | bool isInterfaceLike() const; |
1785 | |
1786 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1787 | static bool classofKind(Kind K) { |
1788 | return K >= firstCXXRecord && K <= lastCXXRecord; |
1789 | } |
1790 | void markAbstract() { data().Abstract = true; } |
1791 | }; |
1792 | |
1793 | /// Store information needed for an explicit specifier. |
1794 | /// Used by CXXDeductionGuideDecl, CXXConstructorDecl and CXXConversionDecl. |
1795 | class ExplicitSpecifier { |
1796 | llvm::PointerIntPair<Expr *, 2, ExplicitSpecKind> ExplicitSpec{ |
1797 | nullptr, ExplicitSpecKind::ResolvedFalse}; |
1798 | |
1799 | public: |
1800 | ExplicitSpecifier() = default; |
1801 | ExplicitSpecifier(Expr *Expression, ExplicitSpecKind Kind) |
1802 | : ExplicitSpec(Expression, Kind) {} |
1803 | ExplicitSpecKind getKind() const { return ExplicitSpec.getInt(); } |
1804 | const Expr *getExpr() const { return ExplicitSpec.getPointer(); } |
1805 | Expr *getExpr() { return ExplicitSpec.getPointer(); } |
1806 | |
1807 | /// Determine if the declaration had an explicit specifier of any kind. |
1808 | bool isSpecified() const { |
1809 | return ExplicitSpec.getInt() != ExplicitSpecKind::ResolvedFalse || |
1810 | ExplicitSpec.getPointer(); |
1811 | } |
1812 | |
1813 | /// Check for equivalence of explicit specifiers. |
1814 | /// \return true if the explicit specifier are equivalent, false otherwise. |
1815 | bool isEquivalent(const ExplicitSpecifier Other) const; |
1816 | /// Determine whether this specifier is known to correspond to an explicit |
1817 | /// declaration. Returns false if the specifier is absent or has an |
1818 | /// expression that is value-dependent or evaluates to false. |
1819 | bool isExplicit() const { |
1820 | return ExplicitSpec.getInt() == ExplicitSpecKind::ResolvedTrue; |
1821 | } |
1822 | /// Determine if the explicit specifier is invalid. |
1823 | /// This state occurs after a substitution failures. |
1824 | bool isInvalid() const { |
1825 | return ExplicitSpec.getInt() == ExplicitSpecKind::Unresolved && |
1826 | !ExplicitSpec.getPointer(); |
1827 | } |
1828 | void setKind(ExplicitSpecKind Kind) { ExplicitSpec.setInt(Kind); } |
1829 | void setExpr(Expr *E) { ExplicitSpec.setPointer(E); } |
1830 | // Retrieve the explicit specifier in the given declaration, if any. |
1831 | static ExplicitSpecifier getFromDecl(FunctionDecl *Function); |
1832 | static const ExplicitSpecifier getFromDecl(const FunctionDecl *Function) { |
1833 | return getFromDecl(const_cast<FunctionDecl *>(Function)); |
1834 | } |
1835 | static ExplicitSpecifier Invalid() { |
1836 | return ExplicitSpecifier(nullptr, ExplicitSpecKind::Unresolved); |
1837 | } |
1838 | }; |
1839 | |
1840 | /// Represents a C++ deduction guide declaration. |
1841 | /// |
1842 | /// \code |
1843 | /// template<typename T> struct A { A(); A(T); }; |
1844 | /// A() -> A<int>; |
1845 | /// \endcode |
1846 | /// |
1847 | /// In this example, there will be an explicit deduction guide from the |
1848 | /// second line, and implicit deduction guide templates synthesized from |
1849 | /// the constructors of \c A. |
1850 | class CXXDeductionGuideDecl : public FunctionDecl { |
1851 | void anchor() override; |
1852 | |
1853 | private: |
1854 | CXXDeductionGuideDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1855 | ExplicitSpecifier ES, |
1856 | const DeclarationNameInfo &NameInfo, QualType T, |
1857 | TypeSourceInfo *TInfo, SourceLocation EndLocation, |
1858 | CXXConstructorDecl *Ctor) |
1859 | : FunctionDecl(CXXDeductionGuide, C, DC, StartLoc, NameInfo, T, TInfo, |
1860 | SC_None, false, false, ConstexprSpecKind::Unspecified), |
1861 | Ctor(Ctor), ExplicitSpec(ES) { |
1862 | if (EndLocation.isValid()) |
1863 | setRangeEnd(EndLocation); |
1864 | setIsCopyDeductionCandidate(false); |
1865 | } |
1866 | |
1867 | CXXConstructorDecl *Ctor; |
1868 | ExplicitSpecifier ExplicitSpec; |
1869 | void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; } |
1870 | |
1871 | public: |
1872 | friend class ASTDeclReader; |
1873 | friend class ASTDeclWriter; |
1874 | |
1875 | static CXXDeductionGuideDecl * |
1876 | Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1877 | ExplicitSpecifier ES, const DeclarationNameInfo &NameInfo, QualType T, |
1878 | TypeSourceInfo *TInfo, SourceLocation EndLocation, |
1879 | CXXConstructorDecl *Ctor = nullptr); |
1880 | |
1881 | static CXXDeductionGuideDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1882 | |
1883 | ExplicitSpecifier getExplicitSpecifier() { return ExplicitSpec; } |
1884 | const ExplicitSpecifier getExplicitSpecifier() const { return ExplicitSpec; } |
1885 | |
1886 | /// Return true if the declartion is already resolved to be explicit. |
1887 | bool isExplicit() const { return ExplicitSpec.isExplicit(); } |
1888 | |
1889 | /// Get the template for which this guide performs deduction. |
1890 | TemplateDecl *getDeducedTemplate() const { |
1891 | return getDeclName().getCXXDeductionGuideTemplate(); |
1892 | } |
1893 | |
1894 | /// Get the constructor from which this deduction guide was generated, if |
1895 | /// this is an implicit deduction guide. |
1896 | CXXConstructorDecl *getCorrespondingConstructor() const { |
1897 | return Ctor; |
1898 | } |
1899 | |
1900 | void setIsCopyDeductionCandidate(bool isCDC = true) { |
1901 | FunctionDeclBits.IsCopyDeductionCandidate = isCDC; |
1902 | } |
1903 | |
1904 | bool isCopyDeductionCandidate() const { |
1905 | return FunctionDeclBits.IsCopyDeductionCandidate; |
1906 | } |
1907 | |
1908 | // Implement isa/cast/dyncast/etc. |
1909 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1910 | static bool classofKind(Kind K) { return K == CXXDeductionGuide; } |
1911 | }; |
1912 | |
1913 | /// \brief Represents the body of a requires-expression. |
1914 | /// |
1915 | /// This decl exists merely to serve as the DeclContext for the local |
1916 | /// parameters of the requires expression as well as other declarations inside |
1917 | /// it. |
1918 | /// |
1919 | /// \code |
1920 | /// template<typename T> requires requires (T t) { {t++} -> regular; } |
1921 | /// \endcode |
1922 | /// |
1923 | /// In this example, a RequiresExpr object will be generated for the expression, |
1924 | /// and a RequiresExprBodyDecl will be created to hold the parameter t and the |
1925 | /// template argument list imposed by the compound requirement. |
1926 | class RequiresExprBodyDecl : public Decl, public DeclContext { |
1927 | RequiresExprBodyDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc) |
1928 | : Decl(RequiresExprBody, DC, StartLoc), DeclContext(RequiresExprBody) {} |
1929 | |
1930 | public: |
1931 | friend class ASTDeclReader; |
1932 | friend class ASTDeclWriter; |
1933 | |
1934 | static RequiresExprBodyDecl *Create(ASTContext &C, DeclContext *DC, |
1935 | SourceLocation StartLoc); |
1936 | |
1937 | static RequiresExprBodyDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1938 | |
1939 | // Implement isa/cast/dyncast/etc. |
1940 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1941 | static bool classofKind(Kind K) { return K == RequiresExprBody; } |
1942 | }; |
1943 | |
1944 | /// Represents a static or instance method of a struct/union/class. |
1945 | /// |
1946 | /// In the terminology of the C++ Standard, these are the (static and |
1947 | /// non-static) member functions, whether virtual or not. |
1948 | class CXXMethodDecl : public FunctionDecl { |
1949 | void anchor() override; |
1950 | |
1951 | protected: |
1952 | CXXMethodDecl(Kind DK, ASTContext &C, CXXRecordDecl *RD, |
1953 | SourceLocation StartLoc, const DeclarationNameInfo &NameInfo, |
1954 | QualType T, TypeSourceInfo *TInfo, StorageClass SC, |
1955 | bool UsesFPIntrin, bool isInline, |
1956 | ConstexprSpecKind ConstexprKind, SourceLocation EndLocation, |
1957 | Expr *TrailingRequiresClause = nullptr) |
1958 | : FunctionDecl(DK, C, RD, StartLoc, NameInfo, T, TInfo, SC, UsesFPIntrin, |
1959 | isInline, ConstexprKind, TrailingRequiresClause) { |
1960 | if (EndLocation.isValid()) |
1961 | setRangeEnd(EndLocation); |
1962 | } |
1963 | |
1964 | public: |
1965 | static CXXMethodDecl * |
1966 | Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
1967 | const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, |
1968 | StorageClass SC, bool UsesFPIntrin, bool isInline, |
1969 | ConstexprSpecKind ConstexprKind, SourceLocation EndLocation, |
1970 | Expr *TrailingRequiresClause = nullptr); |
1971 | |
1972 | static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1973 | |
1974 | bool isStatic() const; |
1975 | bool isInstance() const { return !isStatic(); } |
1976 | |
1977 | /// Returns true if the given operator is implicitly static in a record |
1978 | /// context. |
1979 | static bool isStaticOverloadedOperator(OverloadedOperatorKind OOK) { |
1980 | // [class.free]p1: |
1981 | // Any allocation function for a class T is a static member |
1982 | // (even if not explicitly declared static). |
1983 | // [class.free]p6 Any deallocation function for a class X is a static member |
1984 | // (even if not explicitly declared static). |
1985 | return OOK == OO_New || OOK == OO_Array_New || OOK == OO_Delete || |
1986 | OOK == OO_Array_Delete; |
1987 | } |
1988 | |
1989 | bool isConst() const { return getType()->castAs<FunctionType>()->isConst(); } |
1990 | bool isVolatile() const { return getType()->castAs<FunctionType>()->isVolatile(); } |
1991 | |
1992 | bool isVirtual() const { |
1993 | CXXMethodDecl *CD = const_cast<CXXMethodDecl*>(this)->getCanonicalDecl(); |
1994 | |
1995 | // Member function is virtual if it is marked explicitly so, or if it is |
1996 | // declared in __interface -- then it is automatically pure virtual. |
1997 | if (CD->isVirtualAsWritten() || CD->isPure()) |
1998 | return true; |
1999 | |
2000 | return CD->size_overridden_methods() != 0; |
2001 | } |
2002 | |
2003 | /// If it's possible to devirtualize a call to this method, return the called |
2004 | /// function. Otherwise, return null. |
2005 | |
2006 | /// \param Base The object on which this virtual function is called. |
2007 | /// \param IsAppleKext True if we are compiling for Apple kext. |
2008 | CXXMethodDecl *getDevirtualizedMethod(const Expr *Base, bool IsAppleKext); |
2009 | |
2010 | const CXXMethodDecl *getDevirtualizedMethod(const Expr *Base, |
2011 | bool IsAppleKext) const { |
2012 | return const_cast<CXXMethodDecl *>(this)->getDevirtualizedMethod( |
2013 | Base, IsAppleKext); |
2014 | } |
2015 | |
2016 | /// Determine whether this is a usual deallocation function (C++ |
2017 | /// [basic.stc.dynamic.deallocation]p2), which is an overloaded delete or |
2018 | /// delete[] operator with a particular signature. Populates \p PreventedBy |
2019 | /// with the declarations of the functions of the same kind if they were the |
2020 | /// reason for this function returning false. This is used by |
2021 | /// Sema::isUsualDeallocationFunction to reconsider the answer based on the |
2022 | /// context. |
2023 | bool isUsualDeallocationFunction( |
2024 | SmallVectorImpl<const FunctionDecl *> &PreventedBy) const; |
2025 | |
2026 | /// Determine whether this is a copy-assignment operator, regardless |
2027 | /// of whether it was declared implicitly or explicitly. |
2028 | bool isCopyAssignmentOperator() const; |
2029 | |
2030 | /// Determine whether this is a move assignment operator. |
2031 | bool isMoveAssignmentOperator() const; |
2032 | |
2033 | CXXMethodDecl *getCanonicalDecl() override { |
2034 | return cast<CXXMethodDecl>(FunctionDecl::getCanonicalDecl()); |
2035 | } |
2036 | const CXXMethodDecl *getCanonicalDecl() const { |
2037 | return const_cast<CXXMethodDecl*>(this)->getCanonicalDecl(); |
2038 | } |
2039 | |
2040 | CXXMethodDecl *getMostRecentDecl() { |
2041 | return cast<CXXMethodDecl>( |
2042 | static_cast<FunctionDecl *>(this)->getMostRecentDecl()); |
2043 | } |
2044 | const CXXMethodDecl *getMostRecentDecl() const { |
2045 | return const_cast<CXXMethodDecl*>(this)->getMostRecentDecl(); |
2046 | } |
2047 | |
2048 | void addOverriddenMethod(const CXXMethodDecl *MD); |
2049 | |
2050 | using method_iterator = const CXXMethodDecl *const *; |
2051 | |
2052 | method_iterator begin_overridden_methods() const; |
2053 | method_iterator end_overridden_methods() const; |
2054 | unsigned size_overridden_methods() const; |
2055 | |
2056 | using overridden_method_range = llvm::iterator_range< |
2057 | llvm::TinyPtrVector<const CXXMethodDecl *>::const_iterator>; |
2058 | |
2059 | overridden_method_range overridden_methods() const; |
2060 | |
2061 | /// Return the parent of this method declaration, which |
2062 | /// is the class in which this method is defined. |
2063 | const CXXRecordDecl *getParent() const { |
2064 | return cast<CXXRecordDecl>(FunctionDecl::getParent()); |
2065 | } |
2066 | |
2067 | /// Return the parent of this method declaration, which |
2068 | /// is the class in which this method is defined. |
2069 | CXXRecordDecl *getParent() { |
2070 | return const_cast<CXXRecordDecl *>( |
2071 | cast<CXXRecordDecl>(FunctionDecl::getParent())); |
2072 | } |
2073 | |
2074 | /// Return the type of the \c this pointer. |
2075 | /// |
2076 | /// Should only be called for instance (i.e., non-static) methods. Note |
2077 | /// that for the call operator of a lambda closure type, this returns the |
2078 | /// desugared 'this' type (a pointer to the closure type), not the captured |
2079 | /// 'this' type. |
2080 | QualType getThisType() const; |
2081 | |
2082 | /// Return the type of the object pointed by \c this. |
2083 | /// |
2084 | /// See getThisType() for usage restriction. |
2085 | QualType getThisObjectType() const; |
2086 | |
2087 | static QualType getThisType(const FunctionProtoType *FPT, |
2088 | const CXXRecordDecl *Decl); |
2089 | |
2090 | static QualType getThisObjectType(const FunctionProtoType *FPT, |
2091 | const CXXRecordDecl *Decl); |
2092 | |
2093 | Qualifiers getMethodQualifiers() const { |
2094 | return getType()->castAs<FunctionProtoType>()->getMethodQuals(); |
2095 | } |
2096 | |
2097 | /// Retrieve the ref-qualifier associated with this method. |
2098 | /// |
2099 | /// In the following example, \c f() has an lvalue ref-qualifier, \c g() |
2100 | /// has an rvalue ref-qualifier, and \c h() has no ref-qualifier. |
2101 | /// @code |
2102 | /// struct X { |
2103 | /// void f() &; |
2104 | /// void g() &&; |
2105 | /// void h(); |
2106 | /// }; |
2107 | /// @endcode |
2108 | RefQualifierKind getRefQualifier() const { |
2109 | return getType()->castAs<FunctionProtoType>()->getRefQualifier(); |
2110 | } |
2111 | |
2112 | bool hasInlineBody() const; |
2113 | |
2114 | /// Determine whether this is a lambda closure type's static member |
2115 | /// function that is used for the result of the lambda's conversion to |
2116 | /// function pointer (for a lambda with no captures). |
2117 | /// |
2118 | /// The function itself, if used, will have a placeholder body that will be |
2119 | /// supplied by IR generation to either forward to the function call operator |
2120 | /// or clone the function call operator. |
2121 | bool isLambdaStaticInvoker() const; |
2122 | |
2123 | /// Find the method in \p RD that corresponds to this one. |
2124 | /// |
2125 | /// Find if \p RD or one of the classes it inherits from override this method. |
2126 | /// If so, return it. \p RD is assumed to be a subclass of the class defining |
2127 | /// this method (or be the class itself), unless \p MayBeBase is set to true. |
2128 | CXXMethodDecl * |
2129 | getCorrespondingMethodInClass(const CXXRecordDecl *RD, |
2130 | bool MayBeBase = false); |
2131 | |
2132 | const CXXMethodDecl * |
2133 | getCorrespondingMethodInClass(const CXXRecordDecl *RD, |
2134 | bool MayBeBase = false) const { |
2135 | return const_cast<CXXMethodDecl *>(this) |
2136 | ->getCorrespondingMethodInClass(RD, MayBeBase); |
2137 | } |
2138 | |
2139 | /// Find if \p RD declares a function that overrides this function, and if so, |
2140 | /// return it. Does not search base classes. |
2141 | CXXMethodDecl *getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD, |
2142 | bool MayBeBase = false); |
2143 | const CXXMethodDecl * |
2144 | getCorrespondingMethodDeclaredInClass(const CXXRecordDecl *RD, |
2145 | bool MayBeBase = false) const { |
2146 | return const_cast<CXXMethodDecl *>(this) |
2147 | ->getCorrespondingMethodDeclaredInClass(RD, MayBeBase); |
2148 | } |
2149 | |
2150 | // Implement isa/cast/dyncast/etc. |
2151 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2152 | static bool classofKind(Kind K) { |
2153 | return K >= firstCXXMethod && K <= lastCXXMethod; |
2154 | } |
2155 | }; |
2156 | |
2157 | /// Represents a C++ base or member initializer. |
2158 | /// |
2159 | /// This is part of a constructor initializer that |
2160 | /// initializes one non-static member variable or one base class. For |
2161 | /// example, in the following, both 'A(a)' and 'f(3.14159)' are member |
2162 | /// initializers: |
2163 | /// |
2164 | /// \code |
2165 | /// class A { }; |
2166 | /// class B : public A { |
2167 | /// float f; |
2168 | /// public: |
2169 | /// B(A& a) : A(a), f(3.14159) { } |
2170 | /// }; |
2171 | /// \endcode |
2172 | class CXXCtorInitializer final { |
2173 | /// Either the base class name/delegating constructor type (stored as |
2174 | /// a TypeSourceInfo*), an normal field (FieldDecl), or an anonymous field |
2175 | /// (IndirectFieldDecl*) being initialized. |
2176 | llvm::PointerUnion<TypeSourceInfo *, FieldDecl *, IndirectFieldDecl *> |
2177 | Initializee; |
2178 | |
2179 | /// The argument used to initialize the base or member, which may |
2180 | /// end up constructing an object (when multiple arguments are involved). |
2181 | Stmt *Init; |
2182 | |
2183 | /// The source location for the field name or, for a base initializer |
2184 | /// pack expansion, the location of the ellipsis. |
2185 | /// |
2186 | /// In the case of a delegating |
2187 | /// constructor, it will still include the type's source location as the |
2188 | /// Initializee points to the CXXConstructorDecl (to allow loop detection). |
2189 | SourceLocation MemberOrEllipsisLocation; |
2190 | |
2191 | /// Location of the left paren of the ctor-initializer. |
2192 | SourceLocation LParenLoc; |
2193 | |
2194 | /// Location of the right paren of the ctor-initializer. |
2195 | SourceLocation RParenLoc; |
2196 | |
2197 | /// If the initializee is a type, whether that type makes this |
2198 | /// a delegating initialization. |
2199 | unsigned IsDelegating : 1; |
2200 | |
2201 | /// If the initializer is a base initializer, this keeps track |
2202 | /// of whether the base is virtual or not. |
2203 | unsigned IsVirtual : 1; |
2204 | |
2205 | /// Whether or not the initializer is explicitly written |
2206 | /// in the sources. |
2207 | unsigned IsWritten : 1; |
2208 | |
2209 | /// If IsWritten is true, then this number keeps track of the textual order |
2210 | /// of this initializer in the original sources, counting from 0. |
2211 | unsigned SourceOrder : 13; |
2212 | |
2213 | public: |
2214 | /// Creates a new base-class initializer. |
2215 | explicit |
2216 | CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, bool IsVirtual, |
2217 | SourceLocation L, Expr *Init, SourceLocation R, |
2218 | SourceLocation EllipsisLoc); |
2219 | |
2220 | /// Creates a new member initializer. |
2221 | explicit |
2222 | CXXCtorInitializer(ASTContext &Context, FieldDecl *Member, |
2223 | SourceLocation MemberLoc, SourceLocation L, Expr *Init, |
2224 | SourceLocation R); |
2225 | |
2226 | /// Creates a new anonymous field initializer. |
2227 | explicit |
2228 | CXXCtorInitializer(ASTContext &Context, IndirectFieldDecl *Member, |
2229 | SourceLocation MemberLoc, SourceLocation L, Expr *Init, |
2230 | SourceLocation R); |
2231 | |
2232 | /// Creates a new delegating initializer. |
2233 | explicit |
2234 | CXXCtorInitializer(ASTContext &Context, TypeSourceInfo *TInfo, |
2235 | SourceLocation L, Expr *Init, SourceLocation R); |
2236 | |
2237 | /// \return Unique reproducible object identifier. |
2238 | int64_t getID(const ASTContext &Context) const; |
2239 | |
2240 | /// Determine whether this initializer is initializing a base class. |
2241 | bool isBaseInitializer() const { |
2242 | return Initializee.is<TypeSourceInfo*>() && !IsDelegating; |
2243 | } |
2244 | |
2245 | /// Determine whether this initializer is initializing a non-static |
2246 | /// data member. |
2247 | bool isMemberInitializer() const { return Initializee.is<FieldDecl*>(); } |
2248 | |
2249 | bool isAnyMemberInitializer() const { |
2250 | return isMemberInitializer() || isIndirectMemberInitializer(); |
2251 | } |
2252 | |
2253 | bool isIndirectMemberInitializer() const { |
2254 | return Initializee.is<IndirectFieldDecl*>(); |
2255 | } |
2256 | |
2257 | /// Determine whether this initializer is an implicit initializer |
2258 | /// generated for a field with an initializer defined on the member |
2259 | /// declaration. |
2260 | /// |
2261 | /// In-class member initializers (also known as "non-static data member |
2262 | /// initializations", NSDMIs) were introduced in C++11. |
2263 | bool isInClassMemberInitializer() const { |
2264 | return Init->getStmtClass() == Stmt::CXXDefaultInitExprClass; |
2265 | } |
2266 | |
2267 | /// Determine whether this initializer is creating a delegating |
2268 | /// constructor. |
2269 | bool isDelegatingInitializer() const { |
2270 | return Initializee.is<TypeSourceInfo*>() && IsDelegating; |
2271 | } |
2272 | |
2273 | /// Determine whether this initializer is a pack expansion. |
2274 | bool isPackExpansion() const { |
2275 | return isBaseInitializer() && MemberOrEllipsisLocation.isValid(); |
2276 | } |
2277 | |
2278 | // For a pack expansion, returns the location of the ellipsis. |
2279 | SourceLocation getEllipsisLoc() const { |
2280 | if (!isPackExpansion()) |
2281 | return {}; |
2282 | return MemberOrEllipsisLocation; |
2283 | } |
2284 | |
2285 | /// If this is a base class initializer, returns the type of the |
2286 | /// base class with location information. Otherwise, returns an NULL |
2287 | /// type location. |
2288 | TypeLoc getBaseClassLoc() const; |
2289 | |
2290 | /// If this is a base class initializer, returns the type of the base class. |
2291 | /// Otherwise, returns null. |
2292 | const Type *getBaseClass() const; |
2293 | |
2294 | /// Returns whether the base is virtual or not. |
2295 | bool isBaseVirtual() const { |
2296 | assert(isBaseInitializer() && "Must call this on base initializer!")(static_cast <bool> (isBaseInitializer() && "Must call this on base initializer!" ) ? void (0) : __assert_fail ("isBaseInitializer() && \"Must call this on base initializer!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2296, __extension__ __PRETTY_FUNCTION__)); |
2297 | |
2298 | return IsVirtual; |
2299 | } |
2300 | |
2301 | /// Returns the declarator information for a base class or delegating |
2302 | /// initializer. |
2303 | TypeSourceInfo *getTypeSourceInfo() const { |
2304 | return Initializee.dyn_cast<TypeSourceInfo *>(); |
2305 | } |
2306 | |
2307 | /// If this is a member initializer, returns the declaration of the |
2308 | /// non-static data member being initialized. Otherwise, returns null. |
2309 | FieldDecl *getMember() const { |
2310 | if (isMemberInitializer()) |
2311 | return Initializee.get<FieldDecl*>(); |
2312 | return nullptr; |
2313 | } |
2314 | |
2315 | FieldDecl *getAnyMember() const { |
2316 | if (isMemberInitializer()) |
2317 | return Initializee.get<FieldDecl*>(); |
2318 | if (isIndirectMemberInitializer()) |
2319 | return Initializee.get<IndirectFieldDecl*>()->getAnonField(); |
2320 | return nullptr; |
2321 | } |
2322 | |
2323 | IndirectFieldDecl *getIndirectMember() const { |
2324 | if (isIndirectMemberInitializer()) |
2325 | return Initializee.get<IndirectFieldDecl*>(); |
2326 | return nullptr; |
2327 | } |
2328 | |
2329 | SourceLocation getMemberLocation() const { |
2330 | return MemberOrEllipsisLocation; |
2331 | } |
2332 | |
2333 | /// Determine the source location of the initializer. |
2334 | SourceLocation getSourceLocation() const; |
2335 | |
2336 | /// Determine the source range covering the entire initializer. |
2337 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)); |
2338 | |
2339 | /// Determine whether this initializer is explicitly written |
2340 | /// in the source code. |
2341 | bool isWritten() const { return IsWritten; } |
2342 | |
2343 | /// Return the source position of the initializer, counting from 0. |
2344 | /// If the initializer was implicit, -1 is returned. |
2345 | int getSourceOrder() const { |
2346 | return IsWritten ? static_cast<int>(SourceOrder) : -1; |
2347 | } |
2348 | |
2349 | /// Set the source order of this initializer. |
2350 | /// |
2351 | /// This can only be called once for each initializer; it cannot be called |
2352 | /// on an initializer having a positive number of (implicit) array indices. |
2353 | /// |
2354 | /// This assumes that the initializer was written in the source code, and |
2355 | /// ensures that isWritten() returns true. |
2356 | void setSourceOrder(int Pos) { |
2357 | assert(!IsWritten &&(static_cast <bool> (!IsWritten && "setSourceOrder() used on implicit initializer" ) ? void (0) : __assert_fail ("!IsWritten && \"setSourceOrder() used on implicit initializer\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2358, __extension__ __PRETTY_FUNCTION__)) |
2358 | "setSourceOrder() used on implicit initializer")(static_cast <bool> (!IsWritten && "setSourceOrder() used on implicit initializer" ) ? void (0) : __assert_fail ("!IsWritten && \"setSourceOrder() used on implicit initializer\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2358, __extension__ __PRETTY_FUNCTION__)); |
2359 | assert(SourceOrder == 0 &&(static_cast <bool> (SourceOrder == 0 && "calling twice setSourceOrder() on the same initializer" ) ? void (0) : __assert_fail ("SourceOrder == 0 && \"calling twice setSourceOrder() on the same initializer\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2360, __extension__ __PRETTY_FUNCTION__)) |
2360 | "calling twice setSourceOrder() on the same initializer")(static_cast <bool> (SourceOrder == 0 && "calling twice setSourceOrder() on the same initializer" ) ? void (0) : __assert_fail ("SourceOrder == 0 && \"calling twice setSourceOrder() on the same initializer\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2360, __extension__ __PRETTY_FUNCTION__)); |
2361 | assert(Pos >= 0 &&(static_cast <bool> (Pos >= 0 && "setSourceOrder() used to make an initializer implicit" ) ? void (0) : __assert_fail ("Pos >= 0 && \"setSourceOrder() used to make an initializer implicit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2362, __extension__ __PRETTY_FUNCTION__)) |
2362 | "setSourceOrder() used to make an initializer implicit")(static_cast <bool> (Pos >= 0 && "setSourceOrder() used to make an initializer implicit" ) ? void (0) : __assert_fail ("Pos >= 0 && \"setSourceOrder() used to make an initializer implicit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2362, __extension__ __PRETTY_FUNCTION__)); |
2363 | IsWritten = true; |
2364 | SourceOrder = static_cast<unsigned>(Pos); |
2365 | } |
2366 | |
2367 | SourceLocation getLParenLoc() const { return LParenLoc; } |
2368 | SourceLocation getRParenLoc() const { return RParenLoc; } |
2369 | |
2370 | /// Get the initializer. |
2371 | Expr *getInit() const { return static_cast<Expr *>(Init); } |
2372 | }; |
2373 | |
2374 | /// Description of a constructor that was inherited from a base class. |
2375 | class InheritedConstructor { |
2376 | ConstructorUsingShadowDecl *Shadow = nullptr; |
2377 | CXXConstructorDecl *BaseCtor = nullptr; |
2378 | |
2379 | public: |
2380 | InheritedConstructor() = default; |
2381 | InheritedConstructor(ConstructorUsingShadowDecl *Shadow, |
2382 | CXXConstructorDecl *BaseCtor) |
2383 | : Shadow(Shadow), BaseCtor(BaseCtor) {} |
2384 | |
2385 | explicit operator bool() const { return Shadow; } |
2386 | |
2387 | ConstructorUsingShadowDecl *getShadowDecl() const { return Shadow; } |
2388 | CXXConstructorDecl *getConstructor() const { return BaseCtor; } |
2389 | }; |
2390 | |
2391 | /// Represents a C++ constructor within a class. |
2392 | /// |
2393 | /// For example: |
2394 | /// |
2395 | /// \code |
2396 | /// class X { |
2397 | /// public: |
2398 | /// explicit X(int); // represented by a CXXConstructorDecl. |
2399 | /// }; |
2400 | /// \endcode |
2401 | class CXXConstructorDecl final |
2402 | : public CXXMethodDecl, |
2403 | private llvm::TrailingObjects<CXXConstructorDecl, InheritedConstructor, |
2404 | ExplicitSpecifier> { |
2405 | // This class stores some data in DeclContext::CXXConstructorDeclBits |
2406 | // to save some space. Use the provided accessors to access it. |
2407 | |
2408 | /// \name Support for base and member initializers. |
2409 | /// \{ |
2410 | /// The arguments used to initialize the base or member. |
2411 | LazyCXXCtorInitializersPtr CtorInitializers; |
2412 | |
2413 | CXXConstructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
2414 | const DeclarationNameInfo &NameInfo, QualType T, |
2415 | TypeSourceInfo *TInfo, ExplicitSpecifier ES, |
2416 | bool UsesFPIntrin, bool isInline, |
2417 | bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind, |
2418 | InheritedConstructor Inherited, |
2419 | Expr *TrailingRequiresClause); |
2420 | |
2421 | void anchor() override; |
2422 | |
2423 | size_t numTrailingObjects(OverloadToken<InheritedConstructor>) const { |
2424 | return CXXConstructorDeclBits.IsInheritingConstructor; |
2425 | } |
2426 | size_t numTrailingObjects(OverloadToken<ExplicitSpecifier>) const { |
2427 | return CXXConstructorDeclBits.HasTrailingExplicitSpecifier; |
2428 | } |
2429 | |
2430 | ExplicitSpecifier getExplicitSpecifierInternal() const { |
2431 | if (CXXConstructorDeclBits.HasTrailingExplicitSpecifier) |
2432 | return *getTrailingObjects<ExplicitSpecifier>(); |
2433 | return ExplicitSpecifier( |
2434 | nullptr, CXXConstructorDeclBits.IsSimpleExplicit |
2435 | ? ExplicitSpecKind::ResolvedTrue |
2436 | : ExplicitSpecKind::ResolvedFalse); |
2437 | } |
2438 | |
2439 | enum TrailingAllocKind { |
2440 | TAKInheritsConstructor = 1, |
2441 | TAKHasTailExplicit = 1 << 1, |
2442 | }; |
2443 | |
2444 | uint64_t getTrailingAllocKind() const { |
2445 | return numTrailingObjects(OverloadToken<InheritedConstructor>()) | |
2446 | (numTrailingObjects(OverloadToken<ExplicitSpecifier>()) << 1); |
2447 | } |
2448 | |
2449 | public: |
2450 | friend class ASTDeclReader; |
2451 | friend class ASTDeclWriter; |
2452 | friend TrailingObjects; |
2453 | |
2454 | static CXXConstructorDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
2455 | uint64_t AllocKind); |
2456 | static CXXConstructorDecl * |
2457 | Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
2458 | const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, |
2459 | ExplicitSpecifier ES, bool UsesFPIntrin, bool isInline, |
2460 | bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind, |
2461 | InheritedConstructor Inherited = InheritedConstructor(), |
2462 | Expr *TrailingRequiresClause = nullptr); |
2463 | |
2464 | void setExplicitSpecifier(ExplicitSpecifier ES) { |
2465 | assert((!ES.getExpr() ||(static_cast <bool> ((!ES.getExpr() || CXXConstructorDeclBits .HasTrailingExplicitSpecifier) && "cannot set this explicit specifier. no trail-allocated space for " "explicit") ? void (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2468, __extension__ __PRETTY_FUNCTION__)) |
2466 | CXXConstructorDeclBits.HasTrailingExplicitSpecifier) &&(static_cast <bool> ((!ES.getExpr() || CXXConstructorDeclBits .HasTrailingExplicitSpecifier) && "cannot set this explicit specifier. no trail-allocated space for " "explicit") ? void (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2468, __extension__ __PRETTY_FUNCTION__)) |
2467 | "cannot set this explicit specifier. no trail-allocated space for "(static_cast <bool> ((!ES.getExpr() || CXXConstructorDeclBits .HasTrailingExplicitSpecifier) && "cannot set this explicit specifier. no trail-allocated space for " "explicit") ? void (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2468, __extension__ __PRETTY_FUNCTION__)) |
2468 | "explicit")(static_cast <bool> ((!ES.getExpr() || CXXConstructorDeclBits .HasTrailingExplicitSpecifier) && "cannot set this explicit specifier. no trail-allocated space for " "explicit") ? void (0) : __assert_fail ("(!ES.getExpr() || CXXConstructorDeclBits.HasTrailingExplicitSpecifier) && \"cannot set this explicit specifier. no trail-allocated space for \" \"explicit\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2468, __extension__ __PRETTY_FUNCTION__)); |
2469 | if (ES.getExpr()) |
2470 | *getCanonicalDecl()->getTrailingObjects<ExplicitSpecifier>() = ES; |
2471 | else |
2472 | CXXConstructorDeclBits.IsSimpleExplicit = ES.isExplicit(); |
2473 | } |
2474 | |
2475 | ExplicitSpecifier getExplicitSpecifier() { |
2476 | return getCanonicalDecl()->getExplicitSpecifierInternal(); |
2477 | } |
2478 | const ExplicitSpecifier getExplicitSpecifier() const { |
2479 | return getCanonicalDecl()->getExplicitSpecifierInternal(); |
2480 | } |
2481 | |
2482 | /// Return true if the declartion is already resolved to be explicit. |
2483 | bool isExplicit() const { return getExplicitSpecifier().isExplicit(); } |
2484 | |
2485 | /// Iterates through the member/base initializer list. |
2486 | using init_iterator = CXXCtorInitializer **; |
2487 | |
2488 | /// Iterates through the member/base initializer list. |
2489 | using init_const_iterator = CXXCtorInitializer *const *; |
2490 | |
2491 | using init_range = llvm::iterator_range<init_iterator>; |
2492 | using init_const_range = llvm::iterator_range<init_const_iterator>; |
2493 | |
2494 | init_range inits() { return init_range(init_begin(), init_end()); } |
2495 | init_const_range inits() const { |
2496 | return init_const_range(init_begin(), init_end()); |
2497 | } |
2498 | |
2499 | /// Retrieve an iterator to the first initializer. |
2500 | init_iterator init_begin() { |
2501 | const auto *ConstThis = this; |
2502 | return const_cast<init_iterator>(ConstThis->init_begin()); |
2503 | } |
2504 | |
2505 | /// Retrieve an iterator to the first initializer. |
2506 | init_const_iterator init_begin() const; |
2507 | |
2508 | /// Retrieve an iterator past the last initializer. |
2509 | init_iterator init_end() { |
2510 | return init_begin() + getNumCtorInitializers(); |
2511 | } |
2512 | |
2513 | /// Retrieve an iterator past the last initializer. |
2514 | init_const_iterator init_end() const { |
2515 | return init_begin() + getNumCtorInitializers(); |
2516 | } |
2517 | |
2518 | using init_reverse_iterator = std::reverse_iterator<init_iterator>; |
2519 | using init_const_reverse_iterator = |
2520 | std::reverse_iterator<init_const_iterator>; |
2521 | |
2522 | init_reverse_iterator init_rbegin() { |
2523 | return init_reverse_iterator(init_end()); |
2524 | } |
2525 | init_const_reverse_iterator init_rbegin() const { |
2526 | return init_const_reverse_iterator(init_end()); |
2527 | } |
2528 | |
2529 | init_reverse_iterator init_rend() { |
2530 | return init_reverse_iterator(init_begin()); |
2531 | } |
2532 | init_const_reverse_iterator init_rend() const { |
2533 | return init_const_reverse_iterator(init_begin()); |
2534 | } |
2535 | |
2536 | /// Determine the number of arguments used to initialize the member |
2537 | /// or base. |
2538 | unsigned getNumCtorInitializers() const { |
2539 | return CXXConstructorDeclBits.NumCtorInitializers; |
2540 | } |
2541 | |
2542 | void setNumCtorInitializers(unsigned numCtorInitializers) { |
2543 | CXXConstructorDeclBits.NumCtorInitializers = numCtorInitializers; |
2544 | // This assert added because NumCtorInitializers is stored |
2545 | // in CXXConstructorDeclBits as a bitfield and its width has |
2546 | // been shrunk from 32 bits to fit into CXXConstructorDeclBitfields. |
2547 | assert(CXXConstructorDeclBits.NumCtorInitializers ==(static_cast <bool> (CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && "NumCtorInitializers overflow!" ) ? void (0) : __assert_fail ("CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && \"NumCtorInitializers overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2548, __extension__ __PRETTY_FUNCTION__)) |
2548 | numCtorInitializers && "NumCtorInitializers overflow!")(static_cast <bool> (CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && "NumCtorInitializers overflow!" ) ? void (0) : __assert_fail ("CXXConstructorDeclBits.NumCtorInitializers == numCtorInitializers && \"NumCtorInitializers overflow!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2548, __extension__ __PRETTY_FUNCTION__)); |
2549 | } |
2550 | |
2551 | void setCtorInitializers(CXXCtorInitializer **Initializers) { |
2552 | CtorInitializers = Initializers; |
2553 | } |
2554 | |
2555 | /// Determine whether this constructor is a delegating constructor. |
2556 | bool isDelegatingConstructor() const { |
2557 | return (getNumCtorInitializers() == 1) && |
2558 | init_begin()[0]->isDelegatingInitializer(); |
2559 | } |
2560 | |
2561 | /// When this constructor delegates to another, retrieve the target. |
2562 | CXXConstructorDecl *getTargetConstructor() const; |
2563 | |
2564 | /// Whether this constructor is a default |
2565 | /// constructor (C++ [class.ctor]p5), which can be used to |
2566 | /// default-initialize a class of this type. |
2567 | bool isDefaultConstructor() const; |
2568 | |
2569 | /// Whether this constructor is a copy constructor (C++ [class.copy]p2, |
2570 | /// which can be used to copy the class. |
2571 | /// |
2572 | /// \p TypeQuals will be set to the qualifiers on the |
2573 | /// argument type. For example, \p TypeQuals would be set to \c |
2574 | /// Qualifiers::Const for the following copy constructor: |
2575 | /// |
2576 | /// \code |
2577 | /// class X { |
2578 | /// public: |
2579 | /// X(const X&); |
2580 | /// }; |
2581 | /// \endcode |
2582 | bool isCopyConstructor(unsigned &TypeQuals) const; |
2583 | |
2584 | /// Whether this constructor is a copy |
2585 | /// constructor (C++ [class.copy]p2, which can be used to copy the |
2586 | /// class. |
2587 | bool isCopyConstructor() const { |
2588 | unsigned TypeQuals = 0; |
2589 | return isCopyConstructor(TypeQuals); |
2590 | } |
2591 | |
2592 | /// Determine whether this constructor is a move constructor |
2593 | /// (C++11 [class.copy]p3), which can be used to move values of the class. |
2594 | /// |
2595 | /// \param TypeQuals If this constructor is a move constructor, will be set |
2596 | /// to the type qualifiers on the referent of the first parameter's type. |
2597 | bool isMoveConstructor(unsigned &TypeQuals) const; |
2598 | |
2599 | /// Determine whether this constructor is a move constructor |
2600 | /// (C++11 [class.copy]p3), which can be used to move values of the class. |
2601 | bool isMoveConstructor() const { |
2602 | unsigned TypeQuals = 0; |
2603 | return isMoveConstructor(TypeQuals); |
2604 | } |
2605 | |
2606 | /// Determine whether this is a copy or move constructor. |
2607 | /// |
2608 | /// \param TypeQuals Will be set to the type qualifiers on the reference |
2609 | /// parameter, if in fact this is a copy or move constructor. |
2610 | bool isCopyOrMoveConstructor(unsigned &TypeQuals) const; |
2611 | |
2612 | /// Determine whether this a copy or move constructor. |
2613 | bool isCopyOrMoveConstructor() const { |
2614 | unsigned Quals; |
2615 | return isCopyOrMoveConstructor(Quals); |
2616 | } |
2617 | |
2618 | /// Whether this constructor is a |
2619 | /// converting constructor (C++ [class.conv.ctor]), which can be |
2620 | /// used for user-defined conversions. |
2621 | bool isConvertingConstructor(bool AllowExplicit) const; |
2622 | |
2623 | /// Determine whether this is a member template specialization that |
2624 | /// would copy the object to itself. Such constructors are never used to copy |
2625 | /// an object. |
2626 | bool isSpecializationCopyingObject() const; |
2627 | |
2628 | /// Determine whether this is an implicit constructor synthesized to |
2629 | /// model a call to a constructor inherited from a base class. |
2630 | bool isInheritingConstructor() const { |
2631 | return CXXConstructorDeclBits.IsInheritingConstructor; |
2632 | } |
2633 | |
2634 | /// State that this is an implicit constructor synthesized to |
2635 | /// model a call to a constructor inherited from a base class. |
2636 | void setInheritingConstructor(bool isIC = true) { |
2637 | CXXConstructorDeclBits.IsInheritingConstructor = isIC; |
2638 | } |
2639 | |
2640 | /// Get the constructor that this inheriting constructor is based on. |
2641 | InheritedConstructor getInheritedConstructor() const { |
2642 | return isInheritingConstructor() ? |
2643 | *getTrailingObjects<InheritedConstructor>() : InheritedConstructor(); |
2644 | } |
2645 | |
2646 | CXXConstructorDecl *getCanonicalDecl() override { |
2647 | return cast<CXXConstructorDecl>(FunctionDecl::getCanonicalDecl()); |
2648 | } |
2649 | const CXXConstructorDecl *getCanonicalDecl() const { |
2650 | return const_cast<CXXConstructorDecl*>(this)->getCanonicalDecl(); |
2651 | } |
2652 | |
2653 | // Implement isa/cast/dyncast/etc. |
2654 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2655 | static bool classofKind(Kind K) { return K == CXXConstructor; } |
2656 | }; |
2657 | |
2658 | /// Represents a C++ destructor within a class. |
2659 | /// |
2660 | /// For example: |
2661 | /// |
2662 | /// \code |
2663 | /// class X { |
2664 | /// public: |
2665 | /// ~X(); // represented by a CXXDestructorDecl. |
2666 | /// }; |
2667 | /// \endcode |
2668 | class CXXDestructorDecl : public CXXMethodDecl { |
2669 | friend class ASTDeclReader; |
2670 | friend class ASTDeclWriter; |
2671 | |
2672 | // FIXME: Don't allocate storage for these except in the first declaration |
2673 | // of a virtual destructor. |
2674 | FunctionDecl *OperatorDelete = nullptr; |
2675 | Expr *OperatorDeleteThisArg = nullptr; |
2676 | |
2677 | CXXDestructorDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
2678 | const DeclarationNameInfo &NameInfo, QualType T, |
2679 | TypeSourceInfo *TInfo, bool UsesFPIntrin, bool isInline, |
2680 | bool isImplicitlyDeclared, ConstexprSpecKind ConstexprKind, |
2681 | Expr *TrailingRequiresClause = nullptr) |
2682 | : CXXMethodDecl(CXXDestructor, C, RD, StartLoc, NameInfo, T, TInfo, |
2683 | SC_None, UsesFPIntrin, isInline, ConstexprKind, |
2684 | SourceLocation(), TrailingRequiresClause) { |
2685 | setImplicit(isImplicitlyDeclared); |
2686 | } |
2687 | |
2688 | void anchor() override; |
2689 | |
2690 | public: |
2691 | static CXXDestructorDecl * |
2692 | Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
2693 | const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, |
2694 | bool UsesFPIntrin, bool isInline, bool isImplicitlyDeclared, |
2695 | ConstexprSpecKind ConstexprKind, |
2696 | Expr *TrailingRequiresClause = nullptr); |
2697 | static CXXDestructorDecl *CreateDeserialized(ASTContext & C, unsigned ID); |
2698 | |
2699 | void setOperatorDelete(FunctionDecl *OD, Expr *ThisArg); |
2700 | |
2701 | const FunctionDecl *getOperatorDelete() const { |
2702 | return getCanonicalDecl()->OperatorDelete; |
2703 | } |
2704 | |
2705 | Expr *getOperatorDeleteThisArg() const { |
2706 | return getCanonicalDecl()->OperatorDeleteThisArg; |
2707 | } |
2708 | |
2709 | CXXDestructorDecl *getCanonicalDecl() override { |
2710 | return cast<CXXDestructorDecl>(FunctionDecl::getCanonicalDecl()); |
2711 | } |
2712 | const CXXDestructorDecl *getCanonicalDecl() const { |
2713 | return const_cast<CXXDestructorDecl*>(this)->getCanonicalDecl(); |
2714 | } |
2715 | |
2716 | // Implement isa/cast/dyncast/etc. |
2717 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2718 | static bool classofKind(Kind K) { return K == CXXDestructor; } |
2719 | }; |
2720 | |
2721 | /// Represents a C++ conversion function within a class. |
2722 | /// |
2723 | /// For example: |
2724 | /// |
2725 | /// \code |
2726 | /// class X { |
2727 | /// public: |
2728 | /// operator bool(); |
2729 | /// }; |
2730 | /// \endcode |
2731 | class CXXConversionDecl : public CXXMethodDecl { |
2732 | CXXConversionDecl(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
2733 | const DeclarationNameInfo &NameInfo, QualType T, |
2734 | TypeSourceInfo *TInfo, bool UsesFPIntrin, bool isInline, |
2735 | ExplicitSpecifier ES, ConstexprSpecKind ConstexprKind, |
2736 | SourceLocation EndLocation, |
2737 | Expr *TrailingRequiresClause = nullptr) |
2738 | : CXXMethodDecl(CXXConversion, C, RD, StartLoc, NameInfo, T, TInfo, |
2739 | SC_None, UsesFPIntrin, isInline, ConstexprKind, |
2740 | EndLocation, TrailingRequiresClause), |
2741 | ExplicitSpec(ES) {} |
2742 | void anchor() override; |
2743 | |
2744 | ExplicitSpecifier ExplicitSpec; |
2745 | |
2746 | public: |
2747 | friend class ASTDeclReader; |
2748 | friend class ASTDeclWriter; |
2749 | |
2750 | static CXXConversionDecl * |
2751 | Create(ASTContext &C, CXXRecordDecl *RD, SourceLocation StartLoc, |
2752 | const DeclarationNameInfo &NameInfo, QualType T, TypeSourceInfo *TInfo, |
2753 | bool UsesFPIntrin, bool isInline, ExplicitSpecifier ES, |
2754 | ConstexprSpecKind ConstexprKind, SourceLocation EndLocation, |
2755 | Expr *TrailingRequiresClause = nullptr); |
2756 | static CXXConversionDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
2757 | |
2758 | ExplicitSpecifier getExplicitSpecifier() { |
2759 | return getCanonicalDecl()->ExplicitSpec; |
2760 | } |
2761 | |
2762 | const ExplicitSpecifier getExplicitSpecifier() const { |
2763 | return getCanonicalDecl()->ExplicitSpec; |
2764 | } |
2765 | |
2766 | /// Return true if the declartion is already resolved to be explicit. |
2767 | bool isExplicit() const { return getExplicitSpecifier().isExplicit(); } |
2768 | void setExplicitSpecifier(ExplicitSpecifier ES) { ExplicitSpec = ES; } |
2769 | |
2770 | /// Returns the type that this conversion function is converting to. |
2771 | QualType getConversionType() const { |
2772 | return getType()->castAs<FunctionType>()->getReturnType(); |
2773 | } |
2774 | |
2775 | /// Determine whether this conversion function is a conversion from |
2776 | /// a lambda closure type to a block pointer. |
2777 | bool isLambdaToBlockPointerConversion() const; |
2778 | |
2779 | CXXConversionDecl *getCanonicalDecl() override { |
2780 | return cast<CXXConversionDecl>(FunctionDecl::getCanonicalDecl()); |
2781 | } |
2782 | const CXXConversionDecl *getCanonicalDecl() const { |
2783 | return const_cast<CXXConversionDecl*>(this)->getCanonicalDecl(); |
2784 | } |
2785 | |
2786 | // Implement isa/cast/dyncast/etc. |
2787 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2788 | static bool classofKind(Kind K) { return K == CXXConversion; } |
2789 | }; |
2790 | |
2791 | /// Represents a linkage specification. |
2792 | /// |
2793 | /// For example: |
2794 | /// \code |
2795 | /// extern "C" void foo(); |
2796 | /// \endcode |
2797 | class LinkageSpecDecl : public Decl, public DeclContext { |
2798 | virtual void anchor(); |
2799 | // This class stores some data in DeclContext::LinkageSpecDeclBits to save |
2800 | // some space. Use the provided accessors to access it. |
2801 | public: |
2802 | /// Represents the language in a linkage specification. |
2803 | /// |
2804 | /// The values are part of the serialization ABI for |
2805 | /// ASTs and cannot be changed without altering that ABI. |
2806 | enum LanguageIDs { lang_c = 1, lang_cxx = 2 }; |
2807 | |
2808 | private: |
2809 | /// The source location for the extern keyword. |
2810 | SourceLocation ExternLoc; |
2811 | |
2812 | /// The source location for the right brace (if valid). |
2813 | SourceLocation RBraceLoc; |
2814 | |
2815 | LinkageSpecDecl(DeclContext *DC, SourceLocation ExternLoc, |
2816 | SourceLocation LangLoc, LanguageIDs lang, bool HasBraces); |
2817 | |
2818 | public: |
2819 | static LinkageSpecDecl *Create(ASTContext &C, DeclContext *DC, |
2820 | SourceLocation ExternLoc, |
2821 | SourceLocation LangLoc, LanguageIDs Lang, |
2822 | bool HasBraces); |
2823 | static LinkageSpecDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
2824 | |
2825 | /// Return the language specified by this linkage specification. |
2826 | LanguageIDs getLanguage() const { |
2827 | return static_cast<LanguageIDs>(LinkageSpecDeclBits.Language); |
2828 | } |
2829 | |
2830 | /// Set the language specified by this linkage specification. |
2831 | void setLanguage(LanguageIDs L) { LinkageSpecDeclBits.Language = L; } |
2832 | |
2833 | /// Determines whether this linkage specification had braces in |
2834 | /// its syntactic form. |
2835 | bool hasBraces() const { |
2836 | assert(!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces)(static_cast <bool> (!RBraceLoc.isValid() || LinkageSpecDeclBits .HasBraces) ? void (0) : __assert_fail ("!RBraceLoc.isValid() || LinkageSpecDeclBits.HasBraces" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 2836, __extension__ __PRETTY_FUNCTION__)); |
2837 | return LinkageSpecDeclBits.HasBraces; |
2838 | } |
2839 | |
2840 | SourceLocation getExternLoc() const { return ExternLoc; } |
2841 | SourceLocation getRBraceLoc() const { return RBraceLoc; } |
2842 | void setExternLoc(SourceLocation L) { ExternLoc = L; } |
2843 | void setRBraceLoc(SourceLocation L) { |
2844 | RBraceLoc = L; |
2845 | LinkageSpecDeclBits.HasBraces = RBraceLoc.isValid(); |
2846 | } |
2847 | |
2848 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
2849 | if (hasBraces()) |
2850 | return getRBraceLoc(); |
2851 | // No braces: get the end location of the (only) declaration in context |
2852 | // (if present). |
2853 | return decls_empty() ? getLocation() : decls_begin()->getEndLoc(); |
2854 | } |
2855 | |
2856 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
2857 | return SourceRange(ExternLoc, getEndLoc()); |
2858 | } |
2859 | |
2860 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2861 | static bool classofKind(Kind K) { return K == LinkageSpec; } |
2862 | |
2863 | static DeclContext *castToDeclContext(const LinkageSpecDecl *D) { |
2864 | return static_cast<DeclContext *>(const_cast<LinkageSpecDecl*>(D)); |
2865 | } |
2866 | |
2867 | static LinkageSpecDecl *castFromDeclContext(const DeclContext *DC) { |
2868 | return static_cast<LinkageSpecDecl *>(const_cast<DeclContext*>(DC)); |
2869 | } |
2870 | }; |
2871 | |
2872 | /// Represents C++ using-directive. |
2873 | /// |
2874 | /// For example: |
2875 | /// \code |
2876 | /// using namespace std; |
2877 | /// \endcode |
2878 | /// |
2879 | /// \note UsingDirectiveDecl should be Decl not NamedDecl, but we provide |
2880 | /// artificial names for all using-directives in order to store |
2881 | /// them in DeclContext effectively. |
2882 | class UsingDirectiveDecl : public NamedDecl { |
2883 | /// The location of the \c using keyword. |
2884 | SourceLocation UsingLoc; |
2885 | |
2886 | /// The location of the \c namespace keyword. |
2887 | SourceLocation NamespaceLoc; |
2888 | |
2889 | /// The nested-name-specifier that precedes the namespace. |
2890 | NestedNameSpecifierLoc QualifierLoc; |
2891 | |
2892 | /// The namespace nominated by this using-directive. |
2893 | NamedDecl *NominatedNamespace; |
2894 | |
2895 | /// Enclosing context containing both using-directive and nominated |
2896 | /// namespace. |
2897 | DeclContext *CommonAncestor; |
2898 | |
2899 | UsingDirectiveDecl(DeclContext *DC, SourceLocation UsingLoc, |
2900 | SourceLocation NamespcLoc, |
2901 | NestedNameSpecifierLoc QualifierLoc, |
2902 | SourceLocation IdentLoc, |
2903 | NamedDecl *Nominated, |
2904 | DeclContext *CommonAncestor) |
2905 | : NamedDecl(UsingDirective, DC, IdentLoc, getName()), UsingLoc(UsingLoc), |
2906 | NamespaceLoc(NamespcLoc), QualifierLoc(QualifierLoc), |
2907 | NominatedNamespace(Nominated), CommonAncestor(CommonAncestor) {} |
2908 | |
2909 | /// Returns special DeclarationName used by using-directives. |
2910 | /// |
2911 | /// This is only used by DeclContext for storing UsingDirectiveDecls in |
2912 | /// its lookup structure. |
2913 | static DeclarationName getName() { |
2914 | return DeclarationName::getUsingDirectiveName(); |
2915 | } |
2916 | |
2917 | void anchor() override; |
2918 | |
2919 | public: |
2920 | friend class ASTDeclReader; |
2921 | |
2922 | // Friend for getUsingDirectiveName. |
2923 | friend class DeclContext; |
2924 | |
2925 | /// Retrieve the nested-name-specifier that qualifies the |
2926 | /// name of the namespace, with source-location information. |
2927 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
2928 | |
2929 | /// Retrieve the nested-name-specifier that qualifies the |
2930 | /// name of the namespace. |
2931 | NestedNameSpecifier *getQualifier() const { |
2932 | return QualifierLoc.getNestedNameSpecifier(); |
2933 | } |
2934 | |
2935 | NamedDecl *getNominatedNamespaceAsWritten() { return NominatedNamespace; } |
2936 | const NamedDecl *getNominatedNamespaceAsWritten() const { |
2937 | return NominatedNamespace; |
2938 | } |
2939 | |
2940 | /// Returns the namespace nominated by this using-directive. |
2941 | NamespaceDecl *getNominatedNamespace(); |
2942 | |
2943 | const NamespaceDecl *getNominatedNamespace() const { |
2944 | return const_cast<UsingDirectiveDecl*>(this)->getNominatedNamespace(); |
2945 | } |
2946 | |
2947 | /// Returns the common ancestor context of this using-directive and |
2948 | /// its nominated namespace. |
2949 | DeclContext *getCommonAncestor() { return CommonAncestor; } |
2950 | const DeclContext *getCommonAncestor() const { return CommonAncestor; } |
2951 | |
2952 | /// Return the location of the \c using keyword. |
2953 | SourceLocation getUsingLoc() const { return UsingLoc; } |
2954 | |
2955 | // FIXME: Could omit 'Key' in name. |
2956 | /// Returns the location of the \c namespace keyword. |
2957 | SourceLocation getNamespaceKeyLocation() const { return NamespaceLoc; } |
2958 | |
2959 | /// Returns the location of this using declaration's identifier. |
2960 | SourceLocation getIdentLocation() const { return getLocation(); } |
2961 | |
2962 | static UsingDirectiveDecl *Create(ASTContext &C, DeclContext *DC, |
2963 | SourceLocation UsingLoc, |
2964 | SourceLocation NamespaceLoc, |
2965 | NestedNameSpecifierLoc QualifierLoc, |
2966 | SourceLocation IdentLoc, |
2967 | NamedDecl *Nominated, |
2968 | DeclContext *CommonAncestor); |
2969 | static UsingDirectiveDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
2970 | |
2971 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
2972 | return SourceRange(UsingLoc, getLocation()); |
2973 | } |
2974 | |
2975 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2976 | static bool classofKind(Kind K) { return K == UsingDirective; } |
2977 | }; |
2978 | |
2979 | /// Represents a C++ namespace alias. |
2980 | /// |
2981 | /// For example: |
2982 | /// |
2983 | /// \code |
2984 | /// namespace Foo = Bar; |
2985 | /// \endcode |
2986 | class NamespaceAliasDecl : public NamedDecl, |
2987 | public Redeclarable<NamespaceAliasDecl> { |
2988 | friend class ASTDeclReader; |
2989 | |
2990 | /// The location of the \c namespace keyword. |
2991 | SourceLocation NamespaceLoc; |
2992 | |
2993 | /// The location of the namespace's identifier. |
2994 | /// |
2995 | /// This is accessed by TargetNameLoc. |
2996 | SourceLocation IdentLoc; |
2997 | |
2998 | /// The nested-name-specifier that precedes the namespace. |
2999 | NestedNameSpecifierLoc QualifierLoc; |
3000 | |
3001 | /// The Decl that this alias points to, either a NamespaceDecl or |
3002 | /// a NamespaceAliasDecl. |
3003 | NamedDecl *Namespace; |
3004 | |
3005 | NamespaceAliasDecl(ASTContext &C, DeclContext *DC, |
3006 | SourceLocation NamespaceLoc, SourceLocation AliasLoc, |
3007 | IdentifierInfo *Alias, NestedNameSpecifierLoc QualifierLoc, |
3008 | SourceLocation IdentLoc, NamedDecl *Namespace) |
3009 | : NamedDecl(NamespaceAlias, DC, AliasLoc, Alias), redeclarable_base(C), |
3010 | NamespaceLoc(NamespaceLoc), IdentLoc(IdentLoc), |
3011 | QualifierLoc(QualifierLoc), Namespace(Namespace) {} |
3012 | |
3013 | void anchor() override; |
3014 | |
3015 | using redeclarable_base = Redeclarable<NamespaceAliasDecl>; |
3016 | |
3017 | NamespaceAliasDecl *getNextRedeclarationImpl() override; |
3018 | NamespaceAliasDecl *getPreviousDeclImpl() override; |
3019 | NamespaceAliasDecl *getMostRecentDeclImpl() override; |
3020 | |
3021 | public: |
3022 | static NamespaceAliasDecl *Create(ASTContext &C, DeclContext *DC, |
3023 | SourceLocation NamespaceLoc, |
3024 | SourceLocation AliasLoc, |
3025 | IdentifierInfo *Alias, |
3026 | NestedNameSpecifierLoc QualifierLoc, |
3027 | SourceLocation IdentLoc, |
3028 | NamedDecl *Namespace); |
3029 | |
3030 | static NamespaceAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3031 | |
3032 | using redecl_range = redeclarable_base::redecl_range; |
3033 | using redecl_iterator = redeclarable_base::redecl_iterator; |
3034 | |
3035 | using redeclarable_base::redecls_begin; |
3036 | using redeclarable_base::redecls_end; |
3037 | using redeclarable_base::redecls; |
3038 | using redeclarable_base::getPreviousDecl; |
3039 | using redeclarable_base::getMostRecentDecl; |
3040 | |
3041 | NamespaceAliasDecl *getCanonicalDecl() override { |
3042 | return getFirstDecl(); |
3043 | } |
3044 | const NamespaceAliasDecl *getCanonicalDecl() const { |
3045 | return getFirstDecl(); |
3046 | } |
3047 | |
3048 | /// Retrieve the nested-name-specifier that qualifies the |
3049 | /// name of the namespace, with source-location information. |
3050 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
3051 | |
3052 | /// Retrieve the nested-name-specifier that qualifies the |
3053 | /// name of the namespace. |
3054 | NestedNameSpecifier *getQualifier() const { |
3055 | return QualifierLoc.getNestedNameSpecifier(); |
3056 | } |
3057 | |
3058 | /// Retrieve the namespace declaration aliased by this directive. |
3059 | NamespaceDecl *getNamespace() { |
3060 | if (auto *AD = dyn_cast<NamespaceAliasDecl>(Namespace)) |
3061 | return AD->getNamespace(); |
3062 | |
3063 | return cast<NamespaceDecl>(Namespace); |
3064 | } |
3065 | |
3066 | const NamespaceDecl *getNamespace() const { |
3067 | return const_cast<NamespaceAliasDecl *>(this)->getNamespace(); |
3068 | } |
3069 | |
3070 | /// Returns the location of the alias name, i.e. 'foo' in |
3071 | /// "namespace foo = ns::bar;". |
3072 | SourceLocation getAliasLoc() const { return getLocation(); } |
3073 | |
3074 | /// Returns the location of the \c namespace keyword. |
3075 | SourceLocation getNamespaceLoc() const { return NamespaceLoc; } |
3076 | |
3077 | /// Returns the location of the identifier in the named namespace. |
3078 | SourceLocation getTargetNameLoc() const { return IdentLoc; } |
3079 | |
3080 | /// Retrieve the namespace that this alias refers to, which |
3081 | /// may either be a NamespaceDecl or a NamespaceAliasDecl. |
3082 | NamedDecl *getAliasedNamespace() const { return Namespace; } |
3083 | |
3084 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
3085 | return SourceRange(NamespaceLoc, IdentLoc); |
3086 | } |
3087 | |
3088 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3089 | static bool classofKind(Kind K) { return K == NamespaceAlias; } |
3090 | }; |
3091 | |
3092 | /// Implicit declaration of a temporary that was materialized by |
3093 | /// a MaterializeTemporaryExpr and lifetime-extended by a declaration |
3094 | class LifetimeExtendedTemporaryDecl final |
3095 | : public Decl, |
3096 | public Mergeable<LifetimeExtendedTemporaryDecl> { |
3097 | friend class MaterializeTemporaryExpr; |
3098 | friend class ASTDeclReader; |
3099 | |
3100 | Stmt *ExprWithTemporary = nullptr; |
3101 | |
3102 | /// The declaration which lifetime-extended this reference, if any. |
3103 | /// Either a VarDecl, or (for a ctor-initializer) a FieldDecl. |
3104 | ValueDecl *ExtendingDecl = nullptr; |
3105 | unsigned ManglingNumber; |
3106 | |
3107 | mutable APValue *Value = nullptr; |
3108 | |
3109 | virtual void anchor(); |
3110 | |
3111 | LifetimeExtendedTemporaryDecl(Expr *Temp, ValueDecl *EDecl, unsigned Mangling) |
3112 | : Decl(Decl::LifetimeExtendedTemporary, EDecl->getDeclContext(), |
3113 | EDecl->getLocation()), |
3114 | ExprWithTemporary(Temp), ExtendingDecl(EDecl), |
3115 | ManglingNumber(Mangling) {} |
3116 | |
3117 | LifetimeExtendedTemporaryDecl(EmptyShell) |
3118 | : Decl(Decl::LifetimeExtendedTemporary, EmptyShell{}) {} |
3119 | |
3120 | public: |
3121 | static LifetimeExtendedTemporaryDecl *Create(Expr *Temp, ValueDecl *EDec, |
3122 | unsigned Mangling) { |
3123 | return new (EDec->getASTContext(), EDec->getDeclContext()) |
3124 | LifetimeExtendedTemporaryDecl(Temp, EDec, Mangling); |
3125 | } |
3126 | static LifetimeExtendedTemporaryDecl *CreateDeserialized(ASTContext &C, |
3127 | unsigned ID) { |
3128 | return new (C, ID) LifetimeExtendedTemporaryDecl(EmptyShell{}); |
3129 | } |
3130 | |
3131 | ValueDecl *getExtendingDecl() { return ExtendingDecl; } |
3132 | const ValueDecl *getExtendingDecl() const { return ExtendingDecl; } |
3133 | |
3134 | /// Retrieve the storage duration for the materialized temporary. |
3135 | StorageDuration getStorageDuration() const; |
3136 | |
3137 | /// Retrieve the expression to which the temporary materialization conversion |
3138 | /// was applied. This isn't necessarily the initializer of the temporary due |
3139 | /// to the C++98 delayed materialization rules, but |
3140 | /// skipRValueSubobjectAdjustments can be used to find said initializer within |
3141 | /// the subexpression. |
3142 | Expr *getTemporaryExpr() { return cast<Expr>(ExprWithTemporary); } |
3143 | const Expr *getTemporaryExpr() const { return cast<Expr>(ExprWithTemporary); } |
3144 | |
3145 | unsigned getManglingNumber() const { return ManglingNumber; } |
3146 | |
3147 | /// Get the storage for the constant value of a materialized temporary |
3148 | /// of static storage duration. |
3149 | APValue *getOrCreateValue(bool MayCreate) const; |
3150 | |
3151 | APValue *getValue() const { return Value; } |
3152 | |
3153 | // Iterators |
3154 | Stmt::child_range childrenExpr() { |
3155 | return Stmt::child_range(&ExprWithTemporary, &ExprWithTemporary + 1); |
3156 | } |
3157 | |
3158 | Stmt::const_child_range childrenExpr() const { |
3159 | return Stmt::const_child_range(&ExprWithTemporary, &ExprWithTemporary + 1); |
3160 | } |
3161 | |
3162 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3163 | static bool classofKind(Kind K) { |
3164 | return K == Decl::LifetimeExtendedTemporary; |
3165 | } |
3166 | }; |
3167 | |
3168 | /// Represents a shadow declaration implicitly introduced into a scope by a |
3169 | /// (resolved) using-declaration or using-enum-declaration to achieve |
3170 | /// the desired lookup semantics. |
3171 | /// |
3172 | /// For example: |
3173 | /// \code |
3174 | /// namespace A { |
3175 | /// void foo(); |
3176 | /// void foo(int); |
3177 | /// struct foo {}; |
3178 | /// enum bar { bar1, bar2 }; |
3179 | /// } |
3180 | /// namespace B { |
3181 | /// // add a UsingDecl and three UsingShadowDecls (named foo) to B. |
3182 | /// using A::foo; |
3183 | /// // adds UsingEnumDecl and two UsingShadowDecls (named bar1 and bar2) to B. |
3184 | /// using enum A::bar; |
3185 | /// } |
3186 | /// \endcode |
3187 | class UsingShadowDecl : public NamedDecl, public Redeclarable<UsingShadowDecl> { |
3188 | friend class BaseUsingDecl; |
3189 | |
3190 | /// The referenced declaration. |
3191 | NamedDecl *Underlying = nullptr; |
3192 | |
3193 | /// The using declaration which introduced this decl or the next using |
3194 | /// shadow declaration contained in the aforementioned using declaration. |
3195 | NamedDecl *UsingOrNextShadow = nullptr; |
3196 | |
3197 | void anchor() override; |
3198 | |
3199 | using redeclarable_base = Redeclarable<UsingShadowDecl>; |
3200 | |
3201 | UsingShadowDecl *getNextRedeclarationImpl() override { |
3202 | return getNextRedeclaration(); |
3203 | } |
3204 | |
3205 | UsingShadowDecl *getPreviousDeclImpl() override { |
3206 | return getPreviousDecl(); |
3207 | } |
3208 | |
3209 | UsingShadowDecl *getMostRecentDeclImpl() override { |
3210 | return getMostRecentDecl(); |
3211 | } |
3212 | |
3213 | protected: |
3214 | UsingShadowDecl(Kind K, ASTContext &C, DeclContext *DC, SourceLocation Loc, |
3215 | DeclarationName Name, BaseUsingDecl *Introducer, |
3216 | NamedDecl *Target); |
3217 | UsingShadowDecl(Kind K, ASTContext &C, EmptyShell); |
3218 | |
3219 | public: |
3220 | friend class ASTDeclReader; |
3221 | friend class ASTDeclWriter; |
3222 | |
3223 | static UsingShadowDecl *Create(ASTContext &C, DeclContext *DC, |
3224 | SourceLocation Loc, DeclarationName Name, |
3225 | BaseUsingDecl *Introducer, NamedDecl *Target) { |
3226 | return new (C, DC) |
3227 | UsingShadowDecl(UsingShadow, C, DC, Loc, Name, Introducer, Target); |
3228 | } |
3229 | |
3230 | static UsingShadowDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3231 | |
3232 | using redecl_range = redeclarable_base::redecl_range; |
3233 | using redecl_iterator = redeclarable_base::redecl_iterator; |
3234 | |
3235 | using redeclarable_base::redecls_begin; |
3236 | using redeclarable_base::redecls_end; |
3237 | using redeclarable_base::redecls; |
3238 | using redeclarable_base::getPreviousDecl; |
3239 | using redeclarable_base::getMostRecentDecl; |
3240 | using redeclarable_base::isFirstDecl; |
3241 | |
3242 | UsingShadowDecl *getCanonicalDecl() override { |
3243 | return getFirstDecl(); |
3244 | } |
3245 | const UsingShadowDecl *getCanonicalDecl() const { |
3246 | return getFirstDecl(); |
3247 | } |
3248 | |
3249 | /// Gets the underlying declaration which has been brought into the |
3250 | /// local scope. |
3251 | NamedDecl *getTargetDecl() const { return Underlying; } |
3252 | |
3253 | /// Sets the underlying declaration which has been brought into the |
3254 | /// local scope. |
3255 | void setTargetDecl(NamedDecl *ND) { |
3256 | assert(ND && "Target decl is null!")(static_cast <bool> (ND && "Target decl is null!" ) ? void (0) : __assert_fail ("ND && \"Target decl is null!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/AST/DeclCXX.h" , 3256, __extension__ __PRETTY_FUNCTION__)); |
3257 | Underlying = ND; |
3258 | // A UsingShadowDecl is never a friend or local extern declaration, even |
3259 | // if it is a shadow declaration for one. |
3260 | IdentifierNamespace = |
3261 | ND->getIdentifierNamespace() & |
3262 | ~(IDNS_OrdinaryFriend | IDNS_TagFriend | IDNS_LocalExtern); |
3263 | } |
3264 | |
3265 | /// Gets the (written or instantiated) using declaration that introduced this |
3266 | /// declaration. |
3267 | BaseUsingDecl *getIntroducer() const; |
3268 | |
3269 | /// The next using shadow declaration contained in the shadow decl |
3270 | /// chain of the using declaration which introduced this decl. |
3271 | UsingShadowDecl *getNextUsingShadowDecl() const { |
3272 | return dyn_cast_or_null<UsingShadowDecl>(UsingOrNextShadow); |
3273 | } |
3274 | |
3275 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3276 | static bool classofKind(Kind K) { |
3277 | return K == Decl::UsingShadow || K == Decl::ConstructorUsingShadow; |
3278 | } |
3279 | }; |
3280 | |
3281 | /// Represents a C++ declaration that introduces decls from somewhere else. It |
3282 | /// provides a set of the shadow decls so introduced. |
3283 | |
3284 | class BaseUsingDecl : public NamedDecl { |
3285 | /// The first shadow declaration of the shadow decl chain associated |
3286 | /// with this using declaration. |
3287 | /// |
3288 | /// The bool member of the pair is a bool flag a derived type may use |
3289 | /// (UsingDecl makes use of it). |
3290 | llvm::PointerIntPair<UsingShadowDecl *, 1, bool> FirstUsingShadow; |
3291 | |
3292 | protected: |
3293 | BaseUsingDecl(Kind DK, DeclContext *DC, SourceLocation L, DeclarationName N) |
3294 | : NamedDecl(DK, DC, L, N), FirstUsingShadow(nullptr, 0) {} |
3295 | |
3296 | private: |
3297 | void anchor() override; |
3298 | |
3299 | protected: |
3300 | /// A bool flag for use by a derived type |
3301 | bool getShadowFlag() const { return FirstUsingShadow.getInt(); } |
3302 | |
3303 | /// A bool flag a derived type may set |
3304 | void setShadowFlag(bool V) { FirstUsingShadow.setInt(V); } |
3305 | |
3306 | public: |
3307 | friend class ASTDeclReader; |
3308 | friend class ASTDeclWriter; |
3309 | |
3310 | /// Iterates through the using shadow declarations associated with |
3311 | /// this using declaration. |
3312 | class shadow_iterator { |
3313 | /// The current using shadow declaration. |
3314 | UsingShadowDecl *Current = nullptr; |
3315 | |
3316 | public: |
3317 | using value_type = UsingShadowDecl *; |
3318 | using reference = UsingShadowDecl *; |
3319 | using pointer = UsingShadowDecl *; |
3320 | using iterator_category = std::forward_iterator_tag; |
3321 | using difference_type = std::ptrdiff_t; |
3322 | |
3323 | shadow_iterator() = default; |
3324 | explicit shadow_iterator(UsingShadowDecl *C) : Current(C) {} |
3325 | |
3326 | reference operator*() const { return Current; } |
3327 | pointer operator->() const { return Current; } |
3328 | |
3329 | shadow_iterator &operator++() { |
3330 | Current = Current->getNextUsingShadowDecl(); |
3331 | return *this; |
3332 | } |
3333 | |
3334 | shadow_iterator operator++(int) { |
3335 | shadow_iterator tmp(*this); |
3336 | ++(*this); |
3337 | return tmp; |
3338 | } |
3339 | |
3340 | friend bool operator==(shadow_iterator x, shadow_iterator y) { |
3341 | return x.Current == y.Current; |
3342 | } |
3343 | friend bool operator!=(shadow_iterator x, shadow_iterator y) { |
3344 | return x.Current != y.Current; |
3345 | } |
3346 | }; |
3347 | |
3348 | using shadow_range = llvm::iterator_range<shadow_iterator>; |
3349 | |
3350 | shadow_range shadows() const { |
3351 | return shadow_range(shadow_begin(), shadow_end()); |
3352 | } |
3353 | |
3354 | shadow_iterator shadow_begin() const { |
3355 | return shadow_iterator(FirstUsingShadow.getPointer()); |
3356 | } |
3357 | |
3358 | shadow_iterator shadow_end() const { return shadow_iterator(); } |
3359 | |
3360 | /// Return the number of shadowed declarations associated with this |
3361 | /// using declaration. |
3362 | unsigned shadow_size() const { |
3363 | return std::distance(shadow_begin(), shadow_end()); |
3364 | } |
3365 | |
3366 | void addShadowDecl(UsingShadowDecl *S); |
3367 | void removeShadowDecl(UsingShadowDecl *S); |
3368 | |
3369 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3370 | static bool classofKind(Kind K) { return K == Using || K == UsingEnum; } |
3371 | }; |
3372 | |
3373 | /// Represents a C++ using-declaration. |
3374 | /// |
3375 | /// For example: |
3376 | /// \code |
3377 | /// using someNameSpace::someIdentifier; |
3378 | /// \endcode |
3379 | class UsingDecl : public BaseUsingDecl, public Mergeable<UsingDecl> { |
3380 | /// The source location of the 'using' keyword itself. |
3381 | SourceLocation UsingLocation; |
3382 | |
3383 | /// The nested-name-specifier that precedes the name. |
3384 | NestedNameSpecifierLoc QualifierLoc; |
3385 | |
3386 | /// Provides source/type location info for the declaration name |
3387 | /// embedded in the ValueDecl base class. |
3388 | DeclarationNameLoc DNLoc; |
3389 | |
3390 | UsingDecl(DeclContext *DC, SourceLocation UL, |
3391 | NestedNameSpecifierLoc QualifierLoc, |
3392 | const DeclarationNameInfo &NameInfo, bool HasTypenameKeyword) |
3393 | : BaseUsingDecl(Using, DC, NameInfo.getLoc(), NameInfo.getName()), |
3394 | UsingLocation(UL), QualifierLoc(QualifierLoc), |
3395 | DNLoc(NameInfo.getInfo()) { |
3396 | setShadowFlag(HasTypenameKeyword); |
3397 | } |
3398 | |
3399 | void anchor() override; |
3400 | |
3401 | public: |
3402 | friend class ASTDeclReader; |
3403 | friend class ASTDeclWriter; |
3404 | |
3405 | /// Return the source location of the 'using' keyword. |
3406 | SourceLocation getUsingLoc() const { return UsingLocation; } |
3407 | |
3408 | /// Set the source location of the 'using' keyword. |
3409 | void setUsingLoc(SourceLocation L) { UsingLocation = L; } |
3410 | |
3411 | /// Retrieve the nested-name-specifier that qualifies the name, |
3412 | /// with source-location information. |
3413 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
3414 | |
3415 | /// Retrieve the nested-name-specifier that qualifies the name. |
3416 | NestedNameSpecifier *getQualifier() const { |
3417 | return QualifierLoc.getNestedNameSpecifier(); |
3418 | } |
3419 | |
3420 | DeclarationNameInfo getNameInfo() const { |
3421 | return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc); |
3422 | } |
3423 | |
3424 | /// Return true if it is a C++03 access declaration (no 'using'). |
3425 | bool isAccessDeclaration() const { return UsingLocation.isInvalid(); } |
3426 | |
3427 | /// Return true if the using declaration has 'typename'. |
3428 | bool hasTypename() const { return getShadowFlag(); } |
3429 | |
3430 | /// Sets whether the using declaration has 'typename'. |
3431 | void setTypename(bool TN) { setShadowFlag(TN); } |
3432 | |
3433 | static UsingDecl *Create(ASTContext &C, DeclContext *DC, |
3434 | SourceLocation UsingL, |
3435 | NestedNameSpecifierLoc QualifierLoc, |
3436 | const DeclarationNameInfo &NameInfo, |
3437 | bool HasTypenameKeyword); |
3438 | |
3439 | static UsingDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3440 | |
3441 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3442 | |
3443 | /// Retrieves the canonical declaration of this declaration. |
3444 | UsingDecl *getCanonicalDecl() override { |
3445 | return cast<UsingDecl>(getFirstDecl()); |
3446 | } |
3447 | const UsingDecl *getCanonicalDecl() const { |
3448 | return cast<UsingDecl>(getFirstDecl()); |
3449 | } |
3450 | |
3451 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3452 | static bool classofKind(Kind K) { return K == Using; } |
3453 | }; |
3454 | |
3455 | /// Represents a shadow constructor declaration introduced into a |
3456 | /// class by a C++11 using-declaration that names a constructor. |
3457 | /// |
3458 | /// For example: |
3459 | /// \code |
3460 | /// struct Base { Base(int); }; |
3461 | /// struct Derived { |
3462 | /// using Base::Base; // creates a UsingDecl and a ConstructorUsingShadowDecl |
3463 | /// }; |
3464 | /// \endcode |
3465 | class ConstructorUsingShadowDecl final : public UsingShadowDecl { |
3466 | /// If this constructor using declaration inherted the constructor |
3467 | /// from an indirect base class, this is the ConstructorUsingShadowDecl |
3468 | /// in the named direct base class from which the declaration was inherited. |
3469 | ConstructorUsingShadowDecl *NominatedBaseClassShadowDecl = nullptr; |
3470 | |
3471 | /// If this constructor using declaration inherted the constructor |
3472 | /// from an indirect base class, this is the ConstructorUsingShadowDecl |
3473 | /// that will be used to construct the unique direct or virtual base class |
3474 | /// that receives the constructor arguments. |
3475 | ConstructorUsingShadowDecl *ConstructedBaseClassShadowDecl = nullptr; |
3476 | |
3477 | /// \c true if the constructor ultimately named by this using shadow |
3478 | /// declaration is within a virtual base class subobject of the class that |
3479 | /// contains this declaration. |
3480 | unsigned IsVirtual : 1; |
3481 | |
3482 | ConstructorUsingShadowDecl(ASTContext &C, DeclContext *DC, SourceLocation Loc, |
3483 | UsingDecl *Using, NamedDecl *Target, |
3484 | bool TargetInVirtualBase) |
3485 | : UsingShadowDecl(ConstructorUsingShadow, C, DC, Loc, |
3486 | Using->getDeclName(), Using, |
3487 | Target->getUnderlyingDecl()), |
3488 | NominatedBaseClassShadowDecl( |
3489 | dyn_cast<ConstructorUsingShadowDecl>(Target)), |
3490 | ConstructedBaseClassShadowDecl(NominatedBaseClassShadowDecl), |
3491 | IsVirtual(TargetInVirtualBase) { |
3492 | // If we found a constructor that chains to a constructor for a virtual |
3493 | // base, we should directly call that virtual base constructor instead. |
3494 | // FIXME: This logic belongs in Sema. |
3495 | if (NominatedBaseClassShadowDecl && |
3496 | NominatedBaseClassShadowDecl->constructsVirtualBase()) { |
3497 | ConstructedBaseClassShadowDecl = |
3498 | NominatedBaseClassShadowDecl->ConstructedBaseClassShadowDecl; |
3499 | IsVirtual = true; |
3500 | } |
3501 | } |
3502 | |
3503 | ConstructorUsingShadowDecl(ASTContext &C, EmptyShell Empty) |
3504 | : UsingShadowDecl(ConstructorUsingShadow, C, Empty), IsVirtual(false) {} |
3505 | |
3506 | void anchor() override; |
3507 | |
3508 | public: |
3509 | friend class ASTDeclReader; |
3510 | friend class ASTDeclWriter; |
3511 | |
3512 | static ConstructorUsingShadowDecl *Create(ASTContext &C, DeclContext *DC, |
3513 | SourceLocation Loc, |
3514 | UsingDecl *Using, NamedDecl *Target, |
3515 | bool IsVirtual); |
3516 | static ConstructorUsingShadowDecl *CreateDeserialized(ASTContext &C, |
3517 | unsigned ID); |
3518 | |
3519 | /// Override the UsingShadowDecl's getIntroducer, returning the UsingDecl that |
3520 | /// introduced this. |
3521 | UsingDecl *getIntroducer() const { |
3522 | return cast<UsingDecl>(UsingShadowDecl::getIntroducer()); |
3523 | } |
3524 | |
3525 | /// Returns the parent of this using shadow declaration, which |
3526 | /// is the class in which this is declared. |
3527 | //@{ |
3528 | const CXXRecordDecl *getParent() const { |
3529 | return cast<CXXRecordDecl>(getDeclContext()); |
3530 | } |
3531 | CXXRecordDecl *getParent() { |
3532 | return cast<CXXRecordDecl>(getDeclContext()); |
3533 | } |
3534 | //@} |
3535 | |
3536 | /// Get the inheriting constructor declaration for the direct base |
3537 | /// class from which this using shadow declaration was inherited, if there is |
3538 | /// one. This can be different for each redeclaration of the same shadow decl. |
3539 | ConstructorUsingShadowDecl *getNominatedBaseClassShadowDecl() const { |
3540 | return NominatedBaseClassShadowDecl; |
3541 | } |
3542 | |
3543 | /// Get the inheriting constructor declaration for the base class |
3544 | /// for which we don't have an explicit initializer, if there is one. |
3545 | ConstructorUsingShadowDecl *getConstructedBaseClassShadowDecl() const { |
3546 | return ConstructedBaseClassShadowDecl; |
3547 | } |
3548 | |
3549 | /// Get the base class that was named in the using declaration. This |
3550 | /// can be different for each redeclaration of this same shadow decl. |
3551 | CXXRecordDecl *getNominatedBaseClass() const; |
3552 | |
3553 | /// Get the base class whose constructor or constructor shadow |
3554 | /// declaration is passed the constructor arguments. |
3555 | CXXRecordDecl *getConstructedBaseClass() const { |
3556 | return cast<CXXRecordDecl>((ConstructedBaseClassShadowDecl |
3557 | ? ConstructedBaseClassShadowDecl |
3558 | : getTargetDecl()) |
3559 | ->getDeclContext()); |
3560 | } |
3561 | |
3562 | /// Returns \c true if the constructed base class is a virtual base |
3563 | /// class subobject of this declaration's class. |
3564 | bool constructsVirtualBase() const { |
3565 | return IsVirtual; |
3566 | } |
3567 | |
3568 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3569 | static bool classofKind(Kind K) { return K == ConstructorUsingShadow; } |
3570 | }; |
3571 | |
3572 | /// Represents a C++ using-enum-declaration. |
3573 | /// |
3574 | /// For example: |
3575 | /// \code |
3576 | /// using enum SomeEnumTag ; |
3577 | /// \endcode |
3578 | |
3579 | class UsingEnumDecl : public BaseUsingDecl, public Mergeable<UsingEnumDecl> { |
3580 | /// The source location of the 'using' keyword itself. |
3581 | SourceLocation UsingLocation; |
3582 | |
3583 | /// Location of the 'enum' keyword. |
3584 | SourceLocation EnumLocation; |
3585 | |
3586 | /// The enum |
3587 | EnumDecl *Enum; |
3588 | |
3589 | UsingEnumDecl(DeclContext *DC, DeclarationName DN, SourceLocation UL, |
3590 | SourceLocation EL, SourceLocation NL, EnumDecl *ED) |
3591 | : BaseUsingDecl(UsingEnum, DC, NL, DN), UsingLocation(UL), |
3592 | EnumLocation(EL), Enum(ED) {} |
3593 | |
3594 | void anchor() override; |
3595 | |
3596 | public: |
3597 | friend class ASTDeclReader; |
3598 | friend class ASTDeclWriter; |
3599 | |
3600 | /// The source location of the 'using' keyword. |
3601 | SourceLocation getUsingLoc() const { return UsingLocation; } |
3602 | void setUsingLoc(SourceLocation L) { UsingLocation = L; } |
3603 | |
3604 | /// The source location of the 'enum' keyword. |
3605 | SourceLocation getEnumLoc() const { return EnumLocation; } |
3606 | void setEnumLoc(SourceLocation L) { EnumLocation = L; } |
3607 | |
3608 | public: |
3609 | EnumDecl *getEnumDecl() const { return Enum; } |
3610 | |
3611 | static UsingEnumDecl *Create(ASTContext &C, DeclContext *DC, |
3612 | SourceLocation UsingL, SourceLocation EnumL, |
3613 | SourceLocation NameL, EnumDecl *ED); |
3614 | |
3615 | static UsingEnumDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3616 | |
3617 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3618 | |
3619 | /// Retrieves the canonical declaration of this declaration. |
3620 | UsingEnumDecl *getCanonicalDecl() override { |
3621 | return cast<UsingEnumDecl>(getFirstDecl()); |
3622 | } |
3623 | const UsingEnumDecl *getCanonicalDecl() const { |
3624 | return cast<UsingEnumDecl>(getFirstDecl()); |
3625 | } |
3626 | |
3627 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3628 | static bool classofKind(Kind K) { return K == UsingEnum; } |
3629 | }; |
3630 | |
3631 | /// Represents a pack of using declarations that a single |
3632 | /// using-declarator pack-expanded into. |
3633 | /// |
3634 | /// \code |
3635 | /// template<typename ...T> struct X : T... { |
3636 | /// using T::operator()...; |
3637 | /// using T::operator T...; |
3638 | /// }; |
3639 | /// \endcode |
3640 | /// |
3641 | /// In the second case above, the UsingPackDecl will have the name |
3642 | /// 'operator T' (which contains an unexpanded pack), but the individual |
3643 | /// UsingDecls and UsingShadowDecls will have more reasonable names. |
3644 | class UsingPackDecl final |
3645 | : public NamedDecl, public Mergeable<UsingPackDecl>, |
3646 | private llvm::TrailingObjects<UsingPackDecl, NamedDecl *> { |
3647 | /// The UnresolvedUsingValueDecl or UnresolvedUsingTypenameDecl from |
3648 | /// which this waas instantiated. |
3649 | NamedDecl *InstantiatedFrom; |
3650 | |
3651 | /// The number of using-declarations created by this pack expansion. |
3652 | unsigned NumExpansions; |
3653 | |
3654 | UsingPackDecl(DeclContext *DC, NamedDecl *InstantiatedFrom, |
3655 | ArrayRef<NamedDecl *> UsingDecls) |
3656 | : NamedDecl(UsingPack, DC, |
3657 | InstantiatedFrom ? InstantiatedFrom->getLocation() |
3658 | : SourceLocation(), |
3659 | InstantiatedFrom ? InstantiatedFrom->getDeclName() |
3660 | : DeclarationName()), |
3661 | InstantiatedFrom(InstantiatedFrom), NumExpansions(UsingDecls.size()) { |
3662 | std::uninitialized_copy(UsingDecls.begin(), UsingDecls.end(), |
3663 | getTrailingObjects<NamedDecl *>()); |
3664 | } |
3665 | |
3666 | void anchor() override; |
3667 | |
3668 | public: |
3669 | friend class ASTDeclReader; |
3670 | friend class ASTDeclWriter; |
3671 | friend TrailingObjects; |
3672 | |
3673 | /// Get the using declaration from which this was instantiated. This will |
3674 | /// always be an UnresolvedUsingValueDecl or an UnresolvedUsingTypenameDecl |
3675 | /// that is a pack expansion. |
3676 | NamedDecl *getInstantiatedFromUsingDecl() const { return InstantiatedFrom; } |
3677 | |
3678 | /// Get the set of using declarations that this pack expanded into. Note that |
3679 | /// some of these may still be unresolved. |
3680 | ArrayRef<NamedDecl *> expansions() const { |
3681 | return llvm::makeArrayRef(getTrailingObjects<NamedDecl *>(), NumExpansions); |
3682 | } |
3683 | |
3684 | static UsingPackDecl *Create(ASTContext &C, DeclContext *DC, |
3685 | NamedDecl *InstantiatedFrom, |
3686 | ArrayRef<NamedDecl *> UsingDecls); |
3687 | |
3688 | static UsingPackDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
3689 | unsigned NumExpansions); |
3690 | |
3691 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
3692 | return InstantiatedFrom->getSourceRange(); |
3693 | } |
3694 | |
3695 | UsingPackDecl *getCanonicalDecl() override { return getFirstDecl(); } |
3696 | const UsingPackDecl *getCanonicalDecl() const { return getFirstDecl(); } |
3697 | |
3698 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3699 | static bool classofKind(Kind K) { return K == UsingPack; } |
3700 | }; |
3701 | |
3702 | /// Represents a dependent using declaration which was not marked with |
3703 | /// \c typename. |
3704 | /// |
3705 | /// Unlike non-dependent using declarations, these *only* bring through |
3706 | /// non-types; otherwise they would break two-phase lookup. |
3707 | /// |
3708 | /// \code |
3709 | /// template \<class T> class A : public Base<T> { |
3710 | /// using Base<T>::foo; |
3711 | /// }; |
3712 | /// \endcode |
3713 | class UnresolvedUsingValueDecl : public ValueDecl, |
3714 | public Mergeable<UnresolvedUsingValueDecl> { |
3715 | /// The source location of the 'using' keyword |
3716 | SourceLocation UsingLocation; |
3717 | |
3718 | /// If this is a pack expansion, the location of the '...'. |
3719 | SourceLocation EllipsisLoc; |
3720 | |
3721 | /// The nested-name-specifier that precedes the name. |
3722 | NestedNameSpecifierLoc QualifierLoc; |
3723 | |
3724 | /// Provides source/type location info for the declaration name |
3725 | /// embedded in the ValueDecl base class. |
3726 | DeclarationNameLoc DNLoc; |
3727 | |
3728 | UnresolvedUsingValueDecl(DeclContext *DC, QualType Ty, |
3729 | SourceLocation UsingLoc, |
3730 | NestedNameSpecifierLoc QualifierLoc, |
3731 | const DeclarationNameInfo &NameInfo, |
3732 | SourceLocation EllipsisLoc) |
3733 | : ValueDecl(UnresolvedUsingValue, DC, |
3734 | NameInfo.getLoc(), NameInfo.getName(), Ty), |
3735 | UsingLocation(UsingLoc), EllipsisLoc(EllipsisLoc), |
3736 | QualifierLoc(QualifierLoc), DNLoc(NameInfo.getInfo()) {} |
3737 | |
3738 | void anchor() override; |
3739 | |
3740 | public: |
3741 | friend class ASTDeclReader; |
3742 | friend class ASTDeclWriter; |
3743 | |
3744 | /// Returns the source location of the 'using' keyword. |
3745 | SourceLocation getUsingLoc() const { return UsingLocation; } |
3746 | |
3747 | /// Set the source location of the 'using' keyword. |
3748 | void setUsingLoc(SourceLocation L) { UsingLocation = L; } |
3749 | |
3750 | /// Return true if it is a C++03 access declaration (no 'using'). |
3751 | bool isAccessDeclaration() const { return UsingLocation.isInvalid(); } |
3752 | |
3753 | /// Retrieve the nested-name-specifier that qualifies the name, |
3754 | /// with source-location information. |
3755 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
3756 | |
3757 | /// Retrieve the nested-name-specifier that qualifies the name. |
3758 | NestedNameSpecifier *getQualifier() const { |
3759 | return QualifierLoc.getNestedNameSpecifier(); |
3760 | } |
3761 | |
3762 | DeclarationNameInfo getNameInfo() const { |
3763 | return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc); |
3764 | } |
3765 | |
3766 | /// Determine whether this is a pack expansion. |
3767 | bool isPackExpansion() const { |
3768 | return EllipsisLoc.isValid(); |
3769 | } |
3770 | |
3771 | /// Get the location of the ellipsis if this is a pack expansion. |
3772 | SourceLocation getEllipsisLoc() const { |
3773 | return EllipsisLoc; |
3774 | } |
3775 | |
3776 | static UnresolvedUsingValueDecl * |
3777 | Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, |
3778 | NestedNameSpecifierLoc QualifierLoc, |
3779 | const DeclarationNameInfo &NameInfo, SourceLocation EllipsisLoc); |
3780 | |
3781 | static UnresolvedUsingValueDecl * |
3782 | CreateDeserialized(ASTContext &C, unsigned ID); |
3783 | |
3784 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3785 | |
3786 | /// Retrieves the canonical declaration of this declaration. |
3787 | UnresolvedUsingValueDecl *getCanonicalDecl() override { |
3788 | return getFirstDecl(); |
3789 | } |
3790 | const UnresolvedUsingValueDecl *getCanonicalDecl() const { |
3791 | return getFirstDecl(); |
3792 | } |
3793 | |
3794 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3795 | static bool classofKind(Kind K) { return K == UnresolvedUsingValue; } |
3796 | }; |
3797 | |
3798 | /// Represents a dependent using declaration which was marked with |
3799 | /// \c typename. |
3800 | /// |
3801 | /// \code |
3802 | /// template \<class T> class A : public Base<T> { |
3803 | /// using typename Base<T>::foo; |
3804 | /// }; |
3805 | /// \endcode |
3806 | /// |
3807 | /// The type associated with an unresolved using typename decl is |
3808 | /// currently always a typename type. |
3809 | class UnresolvedUsingTypenameDecl |
3810 | : public TypeDecl, |
3811 | public Mergeable<UnresolvedUsingTypenameDecl> { |
3812 | friend class ASTDeclReader; |
3813 | |
3814 | /// The source location of the 'typename' keyword |
3815 | SourceLocation TypenameLocation; |
3816 | |
3817 | /// If this is a pack expansion, the location of the '...'. |
3818 | SourceLocation EllipsisLoc; |
3819 | |
3820 | /// The nested-name-specifier that precedes the name. |
3821 | NestedNameSpecifierLoc QualifierLoc; |
3822 | |
3823 | UnresolvedUsingTypenameDecl(DeclContext *DC, SourceLocation UsingLoc, |
3824 | SourceLocation TypenameLoc, |
3825 | NestedNameSpecifierLoc QualifierLoc, |
3826 | SourceLocation TargetNameLoc, |
3827 | IdentifierInfo *TargetName, |
3828 | SourceLocation EllipsisLoc) |
3829 | : TypeDecl(UnresolvedUsingTypename, DC, TargetNameLoc, TargetName, |
3830 | UsingLoc), |
3831 | TypenameLocation(TypenameLoc), EllipsisLoc(EllipsisLoc), |
3832 | QualifierLoc(QualifierLoc) {} |
3833 | |
3834 | void anchor() override; |
3835 | |
3836 | public: |
3837 | /// Returns the source location of the 'using' keyword. |
3838 | SourceLocation getUsingLoc() const { return getBeginLoc(); } |
3839 | |
3840 | /// Returns the source location of the 'typename' keyword. |
3841 | SourceLocation getTypenameLoc() const { return TypenameLocation; } |
3842 | |
3843 | /// Retrieve the nested-name-specifier that qualifies the name, |
3844 | /// with source-location information. |
3845 | NestedNameSpecifierLoc getQualifierLoc() const { return QualifierLoc; } |
3846 | |
3847 | /// Retrieve the nested-name-specifier that qualifies the name. |
3848 | NestedNameSpecifier *getQualifier() const { |
3849 | return QualifierLoc.getNestedNameSpecifier(); |
3850 | } |
3851 | |
3852 | DeclarationNameInfo getNameInfo() const { |
3853 | return DeclarationNameInfo(getDeclName(), getLocation()); |
3854 | } |
3855 | |
3856 | /// Determine whether this is a pack expansion. |
3857 | bool isPackExpansion() const { |
3858 | return EllipsisLoc.isValid(); |
3859 | } |
3860 | |
3861 | /// Get the location of the ellipsis if this is a pack expansion. |
3862 | SourceLocation getEllipsisLoc() const { |
3863 | return EllipsisLoc; |
3864 | } |
3865 | |
3866 | static UnresolvedUsingTypenameDecl * |
3867 | Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc, |
3868 | SourceLocation TypenameLoc, NestedNameSpecifierLoc QualifierLoc, |
3869 | SourceLocation TargetNameLoc, DeclarationName TargetName, |
3870 | SourceLocation EllipsisLoc); |
3871 | |
3872 | static UnresolvedUsingTypenameDecl * |
3873 | CreateDeserialized(ASTContext &C, unsigned ID); |
3874 | |
3875 | /// Retrieves the canonical declaration of this declaration. |
3876 | UnresolvedUsingTypenameDecl *getCanonicalDecl() override { |
3877 | return getFirstDecl(); |
3878 | } |
3879 | const UnresolvedUsingTypenameDecl *getCanonicalDecl() const { |
3880 | return getFirstDecl(); |
3881 | } |
3882 | |
3883 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3884 | static bool classofKind(Kind K) { return K == UnresolvedUsingTypename; } |
3885 | }; |
3886 | |
3887 | /// This node is generated when a using-declaration that was annotated with |
3888 | /// __attribute__((using_if_exists)) failed to resolve to a known declaration. |
3889 | /// In that case, Sema builds a UsingShadowDecl whose target is an instance of |
3890 | /// this declaration, adding it to the current scope. Referring to this |
3891 | /// declaration in any way is an error. |
3892 | class UnresolvedUsingIfExistsDecl final : public NamedDecl { |
3893 | UnresolvedUsingIfExistsDecl(DeclContext *DC, SourceLocation Loc, |
3894 | DeclarationName Name); |
3895 | |
3896 | void anchor() override; |
3897 | |
3898 | public: |
3899 | static UnresolvedUsingIfExistsDecl *Create(ASTContext &Ctx, DeclContext *DC, |
3900 | SourceLocation Loc, |
3901 | DeclarationName Name); |
3902 | static UnresolvedUsingIfExistsDecl *CreateDeserialized(ASTContext &Ctx, |
3903 | unsigned ID); |
3904 | |
3905 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3906 | static bool classofKind(Kind K) { return K == Decl::UnresolvedUsingIfExists; } |
3907 | }; |
3908 | |
3909 | /// Represents a C++11 static_assert declaration. |
3910 | class StaticAssertDecl : public Decl { |
3911 | llvm::PointerIntPair<Expr *, 1, bool> AssertExprAndFailed; |
3912 | StringLiteral *Message; |
3913 | SourceLocation RParenLoc; |
3914 | |
3915 | StaticAssertDecl(DeclContext *DC, SourceLocation StaticAssertLoc, |
3916 | Expr *AssertExpr, StringLiteral *Message, |
3917 | SourceLocation RParenLoc, bool Failed) |
3918 | : Decl(StaticAssert, DC, StaticAssertLoc), |
3919 | AssertExprAndFailed(AssertExpr, Failed), Message(Message), |
3920 | RParenLoc(RParenLoc) {} |
3921 | |
3922 | virtual void anchor(); |
3923 | |
3924 | public: |
3925 | friend class ASTDeclReader; |
3926 | |
3927 | static StaticAssertDecl *Create(ASTContext &C, DeclContext *DC, |
3928 | SourceLocation StaticAssertLoc, |
3929 | Expr *AssertExpr, StringLiteral *Message, |
3930 | SourceLocation RParenLoc, bool Failed); |
3931 | static StaticAssertDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3932 | |
3933 | Expr *getAssertExpr() { return AssertExprAndFailed.getPointer(); } |
3934 | const Expr *getAssertExpr() const { return AssertExprAndFailed.getPointer(); } |
3935 | |
3936 | StringLiteral *getMessage() { return Message; } |
3937 | const StringLiteral *getMessage() const { return Message; } |
3938 | |
3939 | bool isFailed() const { return AssertExprAndFailed.getInt(); } |
3940 | |
3941 | SourceLocation getRParenLoc() const { return RParenLoc; } |
3942 | |
3943 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
3944 | return SourceRange(getLocation(), getRParenLoc()); |
3945 | } |
3946 | |
3947 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3948 | static bool classofKind(Kind K) { return K == StaticAssert; } |
3949 | }; |
3950 | |
3951 | /// A binding in a decomposition declaration. For instance, given: |
3952 | /// |
3953 | /// int n[3]; |
3954 | /// auto &[a, b, c] = n; |
3955 | /// |
3956 | /// a, b, and c are BindingDecls, whose bindings are the expressions |
3957 | /// x[0], x[1], and x[2] respectively, where x is the implicit |
3958 | /// DecompositionDecl of type 'int (&)[3]'. |
3959 | class BindingDecl : public ValueDecl { |
3960 | /// The declaration that this binding binds to part of. |
3961 | ValueDecl *Decomp; |
3962 | /// The binding represented by this declaration. References to this |
3963 | /// declaration are effectively equivalent to this expression (except |
3964 | /// that it is only evaluated once at the point of declaration of the |
3965 | /// binding). |
3966 | Expr *Binding = nullptr; |
3967 | |
3968 | BindingDecl(DeclContext *DC, SourceLocation IdLoc, IdentifierInfo *Id) |
3969 | : ValueDecl(Decl::Binding, DC, IdLoc, Id, QualType()) {} |
3970 | |
3971 | void anchor() override; |
3972 | |
3973 | public: |
3974 | friend class ASTDeclReader; |
3975 | |
3976 | static BindingDecl *Create(ASTContext &C, DeclContext *DC, |
3977 | SourceLocation IdLoc, IdentifierInfo *Id); |
3978 | static BindingDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3979 | |
3980 | /// Get the expression to which this declaration is bound. This may be null |
3981 | /// in two different cases: while parsing the initializer for the |
3982 | /// decomposition declaration, and when the initializer is type-dependent. |
3983 | Expr *getBinding() const { return Binding; } |
3984 | |
3985 | /// Get the decomposition declaration that this binding represents a |
3986 | /// decomposition of. |
3987 | ValueDecl *getDecomposedDecl() const { return Decomp; } |
3988 | |
3989 | /// Get the variable (if any) that holds the value of evaluating the binding. |
3990 | /// Only present for user-defined bindings for tuple-like types. |
3991 | VarDecl *getHoldingVar() const; |
3992 | |
3993 | /// Set the binding for this BindingDecl, along with its declared type (which |
3994 | /// should be a possibly-cv-qualified form of the type of the binding, or a |
3995 | /// reference to such a type). |
3996 | void setBinding(QualType DeclaredType, Expr *Binding) { |
3997 | setType(DeclaredType); |
3998 | this->Binding = Binding; |
3999 | } |
4000 | |
4001 | /// Set the decomposed variable for this BindingDecl. |
4002 | void setDecomposedDecl(ValueDecl *Decomposed) { Decomp = Decomposed; } |
4003 | |
4004 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4005 | static bool classofKind(Kind K) { return K == Decl::Binding; } |
4006 | }; |
4007 | |
4008 | /// A decomposition declaration. For instance, given: |
4009 | /// |
4010 | /// int n[3]; |
4011 | /// auto &[a, b, c] = n; |
4012 | /// |
4013 | /// the second line declares a DecompositionDecl of type 'int (&)[3]', and |
4014 | /// three BindingDecls (named a, b, and c). An instance of this class is always |
4015 | /// unnamed, but behaves in almost all other respects like a VarDecl. |
4016 | class DecompositionDecl final |
4017 | : public VarDecl, |
4018 | private llvm::TrailingObjects<DecompositionDecl, BindingDecl *> { |
4019 | /// The number of BindingDecl*s following this object. |
4020 | unsigned NumBindings; |
4021 | |
4022 | DecompositionDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
4023 | SourceLocation LSquareLoc, QualType T, |
4024 | TypeSourceInfo *TInfo, StorageClass SC, |
4025 | ArrayRef<BindingDecl *> Bindings) |
4026 | : VarDecl(Decomposition, C, DC, StartLoc, LSquareLoc, nullptr, T, TInfo, |
4027 | SC), |
4028 | NumBindings(Bindings.size()) { |
4029 | std::uninitialized_copy(Bindings.begin(), Bindings.end(), |
4030 | getTrailingObjects<BindingDecl *>()); |
4031 | for (auto *B : Bindings) |
4032 | B->setDecomposedDecl(this); |
4033 | } |
4034 | |
4035 | void anchor() override; |
4036 | |
4037 | public: |
4038 | friend class ASTDeclReader; |
4039 | friend TrailingObjects; |
4040 | |
4041 | static DecompositionDecl *Create(ASTContext &C, DeclContext *DC, |
4042 | SourceLocation StartLoc, |
4043 | SourceLocation LSquareLoc, |
4044 | QualType T, TypeSourceInfo *TInfo, |
4045 | StorageClass S, |
4046 | ArrayRef<BindingDecl *> Bindings); |
4047 | static DecompositionDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
4048 | unsigned NumBindings); |
4049 | |
4050 | ArrayRef<BindingDecl *> bindings() const { |
4051 | return llvm::makeArrayRef(getTrailingObjects<BindingDecl *>(), NumBindings); |
4052 | } |
4053 | |
4054 | void printName(raw_ostream &os) const override; |
4055 | |
4056 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4057 | static bool classofKind(Kind K) { return K == Decomposition; } |
4058 | }; |
4059 | |
4060 | /// An instance of this class represents the declaration of a property |
4061 | /// member. This is a Microsoft extension to C++, first introduced in |
4062 | /// Visual Studio .NET 2003 as a parallel to similar features in C# |
4063 | /// and Managed C++. |
4064 | /// |
4065 | /// A property must always be a non-static class member. |
4066 | /// |
4067 | /// A property member superficially resembles a non-static data |
4068 | /// member, except preceded by a property attribute: |
4069 | /// __declspec(property(get=GetX, put=PutX)) int x; |
4070 | /// Either (but not both) of the 'get' and 'put' names may be omitted. |
4071 | /// |
4072 | /// A reference to a property is always an lvalue. If the lvalue |
4073 | /// undergoes lvalue-to-rvalue conversion, then a getter name is |
4074 | /// required, and that member is called with no arguments. |
4075 | /// If the lvalue is assigned into, then a setter name is required, |
4076 | /// and that member is called with one argument, the value assigned. |
4077 | /// Both operations are potentially overloaded. Compound assignments |
4078 | /// are permitted, as are the increment and decrement operators. |
4079 | /// |
4080 | /// The getter and putter methods are permitted to be overloaded, |
4081 | /// although their return and parameter types are subject to certain |
4082 | /// restrictions according to the type of the property. |
4083 | /// |
4084 | /// A property declared using an incomplete array type may |
4085 | /// additionally be subscripted, adding extra parameters to the getter |
4086 | /// and putter methods. |
4087 | class MSPropertyDecl : public DeclaratorDecl { |
4088 | IdentifierInfo *GetterId, *SetterId; |
4089 | |
4090 | MSPropertyDecl(DeclContext *DC, SourceLocation L, DeclarationName N, |
4091 | QualType T, TypeSourceInfo *TInfo, SourceLocation StartL, |
4092 | IdentifierInfo *Getter, IdentifierInfo *Setter) |
4093 | : DeclaratorDecl(MSProperty, DC, L, N, T, TInfo, StartL), |
4094 | GetterId(Getter), SetterId(Setter) {} |
4095 | |
4096 | void anchor() override; |
4097 | public: |
4098 | friend class ASTDeclReader; |
4099 | |
4100 | static MSPropertyDecl *Create(ASTContext &C, DeclContext *DC, |
4101 | SourceLocation L, DeclarationName N, QualType T, |
4102 | TypeSourceInfo *TInfo, SourceLocation StartL, |
4103 | IdentifierInfo *Getter, IdentifierInfo *Setter); |
4104 | static MSPropertyDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4105 | |
4106 | static bool classof(const Decl *D) { return D->getKind() == MSProperty; } |
4107 | |
4108 | bool hasGetter() const { return GetterId != nullptr; } |
4109 | IdentifierInfo* getGetterId() const { return GetterId; } |
4110 | bool hasSetter() const { return SetterId != nullptr; } |
4111 | IdentifierInfo* getSetterId() const { return SetterId; } |
4112 | }; |
4113 | |
4114 | /// Parts of a decomposed MSGuidDecl. Factored out to avoid unnecessary |
4115 | /// dependencies on DeclCXX.h. |
4116 | struct MSGuidDeclParts { |
4117 | /// {01234567-... |
4118 | uint32_t Part1; |
4119 | /// ...-89ab-... |
4120 | uint16_t Part2; |
4121 | /// ...-cdef-... |
4122 | uint16_t Part3; |
4123 | /// ...-0123-456789abcdef} |
4124 | uint8_t Part4And5[8]; |
4125 | |
4126 | uint64_t getPart4And5AsUint64() const { |
4127 | uint64_t Val; |
4128 | memcpy(&Val, &Part4And5, sizeof(Part4And5)); |
4129 | return Val; |
4130 | } |
4131 | }; |
4132 | |
4133 | /// A global _GUID constant. These are implicitly created by UuidAttrs. |
4134 | /// |
4135 | /// struct _declspec(uuid("01234567-89ab-cdef-0123-456789abcdef")) X{}; |
4136 | /// |
4137 | /// X is a CXXRecordDecl that contains a UuidAttr that references the (unique) |
4138 | /// MSGuidDecl for the specified UUID. |
4139 | class MSGuidDecl : public ValueDecl, |
4140 | public Mergeable<MSGuidDecl>, |
4141 | public llvm::FoldingSetNode { |
4142 | public: |
4143 | using Parts = MSGuidDeclParts; |
4144 | |
4145 | private: |
4146 | /// The decomposed form of the UUID. |
4147 | Parts PartVal; |
4148 | |
4149 | /// The resolved value of the UUID as an APValue. Computed on demand and |
4150 | /// cached. |
4151 | mutable APValue APVal; |
4152 | |
4153 | void anchor() override; |
4154 | |
4155 | MSGuidDecl(DeclContext *DC, QualType T, Parts P); |
4156 | |
4157 | static MSGuidDecl *Create(const ASTContext &C, QualType T, Parts P); |
4158 | static MSGuidDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4159 | |
4160 | // Only ASTContext::getMSGuidDecl and deserialization create these. |
4161 | friend class ASTContext; |
4162 | friend class ASTReader; |
4163 | friend class ASTDeclReader; |
4164 | |
4165 | public: |
4166 | /// Print this UUID in a human-readable format. |
4167 | void printName(llvm::raw_ostream &OS) const override; |
4168 | |
4169 | /// Get the decomposed parts of this declaration. |
4170 | Parts getParts() const { return PartVal; } |
4171 | |
4172 | /// Get the value of this MSGuidDecl as an APValue. This may fail and return |
4173 | /// an absent APValue if the type of the declaration is not of the expected |
4174 | /// shape. |
4175 | APValue &getAsAPValue() const; |
4176 | |
4177 | static void Profile(llvm::FoldingSetNodeID &ID, Parts P) { |
4178 | ID.AddInteger(P.Part1); |
4179 | ID.AddInteger(P.Part2); |
4180 | ID.AddInteger(P.Part3); |
4181 | ID.AddInteger(P.getPart4And5AsUint64()); |
4182 | } |
4183 | void Profile(llvm::FoldingSetNodeID &ID) { Profile(ID, PartVal); } |
4184 | |
4185 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4186 | static bool classofKind(Kind K) { return K == Decl::MSGuid; } |
4187 | }; |
4188 | |
4189 | /// Insertion operator for diagnostics. This allows sending an AccessSpecifier |
4190 | /// into a diagnostic with <<. |
4191 | const StreamingDiagnostic &operator<<(const StreamingDiagnostic &DB, |
4192 | AccessSpecifier AS); |
4193 | |
4194 | } // namespace clang |
4195 | |
4196 | #endif // LLVM_CLANG_AST_DECLCXX_H |