File: | tools/clang/lib/Sema/SemaDeclCXX.cpp |
Warning: | line 2482, column 26 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/STLExtras.h" | ||||||
42 | #include "llvm/ADT/SmallString.h" | ||||||
43 | #include "llvm/ADT/StringExtras.h" | ||||||
44 | #include <map> | ||||||
45 | #include <set> | ||||||
46 | |||||||
47 | using namespace clang; | ||||||
48 | |||||||
49 | //===----------------------------------------------------------------------===// | ||||||
50 | // CheckDefaultArgumentVisitor | ||||||
51 | //===----------------------------------------------------------------------===// | ||||||
52 | |||||||
53 | namespace { | ||||||
54 | /// CheckDefaultArgumentVisitor - C++ [dcl.fct.default] Traverses | ||||||
55 | /// the default argument of a parameter to determine whether it | ||||||
56 | /// contains any ill-formed subexpressions. For example, this will | ||||||
57 | /// diagnose the use of local variables or parameters within the | ||||||
58 | /// default argument expression. | ||||||
59 | class CheckDefaultArgumentVisitor | ||||||
60 | : public StmtVisitor<CheckDefaultArgumentVisitor, bool> { | ||||||
61 | Expr *DefaultArg; | ||||||
62 | Sema *S; | ||||||
63 | |||||||
64 | public: | ||||||
65 | CheckDefaultArgumentVisitor(Expr *defarg, Sema *s) | ||||||
66 | : DefaultArg(defarg), S(s) {} | ||||||
67 | |||||||
68 | bool VisitExpr(Expr *Node); | ||||||
69 | bool VisitDeclRefExpr(DeclRefExpr *DRE); | ||||||
70 | bool VisitCXXThisExpr(CXXThisExpr *ThisE); | ||||||
71 | bool VisitLambdaExpr(LambdaExpr *Lambda); | ||||||
72 | bool VisitPseudoObjectExpr(PseudoObjectExpr *POE); | ||||||
73 | }; | ||||||
74 | |||||||
75 | /// VisitExpr - Visit all of the children of this expression. | ||||||
76 | bool CheckDefaultArgumentVisitor::VisitExpr(Expr *Node) { | ||||||
77 | bool IsInvalid = false; | ||||||
78 | for (Stmt *SubStmt : Node->children()) | ||||||
79 | IsInvalid |= Visit(SubStmt); | ||||||
80 | return IsInvalid; | ||||||
81 | } | ||||||
82 | |||||||
83 | /// VisitDeclRefExpr - Visit a reference to a declaration, to | ||||||
84 | /// determine whether this declaration can be used in the default | ||||||
85 | /// argument expression. | ||||||
86 | bool CheckDefaultArgumentVisitor::VisitDeclRefExpr(DeclRefExpr *DRE) { | ||||||
87 | NamedDecl *Decl = DRE->getDecl(); | ||||||
88 | if (ParmVarDecl *Param = dyn_cast<ParmVarDecl>(Decl)) { | ||||||
89 | // C++ [dcl.fct.default]p9 | ||||||
90 | // Default arguments are evaluated each time the function is | ||||||
91 | // called. The order of evaluation of function arguments is | ||||||
92 | // unspecified. Consequently, parameters of a function shall not | ||||||
93 | // be used in default argument expressions, even if they are not | ||||||
94 | // evaluated. Parameters of a function declared before a default | ||||||
95 | // argument expression are in scope and can hide namespace and | ||||||
96 | // class member names. | ||||||
97 | return S->Diag(DRE->getBeginLoc(), | ||||||
98 | diag::err_param_default_argument_references_param) | ||||||
99 | << Param->getDeclName() << DefaultArg->getSourceRange(); | ||||||
100 | } else if (VarDecl *VDecl = dyn_cast<VarDecl>(Decl)) { | ||||||
101 | // C++ [dcl.fct.default]p7 | ||||||
102 | // Local variables shall not be used in default argument | ||||||
103 | // expressions. | ||||||
104 | if (VDecl->isLocalVarDecl()) | ||||||
105 | return S->Diag(DRE->getBeginLoc(), | ||||||
106 | diag::err_param_default_argument_references_local) | ||||||
107 | << VDecl->getDeclName() << DefaultArg->getSourceRange(); | ||||||
108 | } | ||||||
109 | |||||||
110 | return false; | ||||||
111 | } | ||||||
112 | |||||||
113 | /// VisitCXXThisExpr - Visit a C++ "this" expression. | ||||||
114 | bool CheckDefaultArgumentVisitor::VisitCXXThisExpr(CXXThisExpr *ThisE) { | ||||||
115 | // C++ [dcl.fct.default]p8: | ||||||
116 | // The keyword this shall not be used in a default argument of a | ||||||
117 | // member function. | ||||||
118 | return S->Diag(ThisE->getBeginLoc(), | ||||||
119 | diag::err_param_default_argument_references_this) | ||||||
120 | << ThisE->getSourceRange(); | ||||||
121 | } | ||||||
122 | |||||||
123 | bool CheckDefaultArgumentVisitor::VisitPseudoObjectExpr(PseudoObjectExpr *POE) { | ||||||
124 | bool Invalid = false; | ||||||
125 | for (PseudoObjectExpr::semantics_iterator | ||||||
126 | i = POE->semantics_begin(), e = POE->semantics_end(); i != e; ++i) { | ||||||
127 | Expr *E = *i; | ||||||
128 | |||||||
129 | // Look through bindings. | ||||||
130 | if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(E)) { | ||||||
131 | E = OVE->getSourceExpr(); | ||||||
132 | assert(E && "pseudo-object binding without source expression?")((E && "pseudo-object binding without source expression?" ) ? static_cast<void> (0) : __assert_fail ("E && \"pseudo-object binding without source expression?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 132, __PRETTY_FUNCTION__)); | ||||||
133 | } | ||||||
134 | |||||||
135 | Invalid |= Visit(E); | ||||||
136 | } | ||||||
137 | return Invalid; | ||||||
138 | } | ||||||
139 | |||||||
140 | bool CheckDefaultArgumentVisitor::VisitLambdaExpr(LambdaExpr *Lambda) { | ||||||
141 | // C++11 [expr.lambda.prim]p13: | ||||||
142 | // A lambda-expression appearing in a default argument shall not | ||||||
143 | // implicitly or explicitly capture any entity. | ||||||
144 | if (Lambda->capture_begin() == Lambda->capture_end()) | ||||||
145 | return false; | ||||||
146 | |||||||
147 | return S->Diag(Lambda->getBeginLoc(), diag::err_lambda_capture_default_arg); | ||||||
148 | } | ||||||
149 | } | ||||||
150 | |||||||
151 | void | ||||||
152 | Sema::ImplicitExceptionSpecification::CalledDecl(SourceLocation CallLoc, | ||||||
153 | const CXXMethodDecl *Method) { | ||||||
154 | // If we have an MSAny spec already, don't bother. | ||||||
155 | if (!Method || ComputedEST == EST_MSAny) | ||||||
156 | return; | ||||||
157 | |||||||
158 | const FunctionProtoType *Proto | ||||||
159 | = Method->getType()->getAs<FunctionProtoType>(); | ||||||
160 | Proto = Self->ResolveExceptionSpec(CallLoc, Proto); | ||||||
161 | if (!Proto) | ||||||
162 | return; | ||||||
163 | |||||||
164 | ExceptionSpecificationType EST = Proto->getExceptionSpecType(); | ||||||
165 | |||||||
166 | // If we have a throw-all spec at this point, ignore the function. | ||||||
167 | if (ComputedEST == EST_None) | ||||||
168 | return; | ||||||
169 | |||||||
170 | if (EST == EST_None && Method->hasAttr<NoThrowAttr>()) | ||||||
171 | EST = EST_BasicNoexcept; | ||||||
172 | |||||||
173 | switch (EST) { | ||||||
174 | case EST_Unparsed: | ||||||
175 | case EST_Uninstantiated: | ||||||
176 | case EST_Unevaluated: | ||||||
177 | llvm_unreachable("should not see unresolved exception specs here")::llvm::llvm_unreachable_internal("should not see unresolved exception specs here" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 177); | ||||||
178 | |||||||
179 | // If this function can throw any exceptions, make a note of that. | ||||||
180 | case EST_MSAny: | ||||||
181 | case EST_None: | ||||||
182 | // FIXME: Whichever we see last of MSAny and None determines our result. | ||||||
183 | // We should make a consistent, order-independent choice here. | ||||||
184 | ClearExceptions(); | ||||||
185 | ComputedEST = EST; | ||||||
186 | return; | ||||||
187 | case EST_NoexceptFalse: | ||||||
188 | ClearExceptions(); | ||||||
189 | ComputedEST = EST_None; | ||||||
190 | return; | ||||||
191 | // FIXME: If the call to this decl is using any of its default arguments, we | ||||||
192 | // need to search them for potentially-throwing calls. | ||||||
193 | // If this function has a basic noexcept, it doesn't affect the outcome. | ||||||
194 | case EST_BasicNoexcept: | ||||||
195 | case EST_NoexceptTrue: | ||||||
196 | case EST_NoThrow: | ||||||
197 | return; | ||||||
198 | // If we're still at noexcept(true) and there's a throw() callee, | ||||||
199 | // change to that specification. | ||||||
200 | case EST_DynamicNone: | ||||||
201 | if (ComputedEST == EST_BasicNoexcept) | ||||||
202 | ComputedEST = EST_DynamicNone; | ||||||
203 | return; | ||||||
204 | case EST_DependentNoexcept: | ||||||
205 | llvm_unreachable(::llvm::llvm_unreachable_internal("should not generate implicit declarations for dependent cases" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 206) | ||||||
206 | "should not generate implicit declarations for dependent cases")::llvm::llvm_unreachable_internal("should not generate implicit declarations for dependent cases" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 206); | ||||||
207 | case EST_Dynamic: | ||||||
208 | break; | ||||||
209 | } | ||||||
210 | assert(EST == EST_Dynamic && "EST case not considered earlier.")((EST == EST_Dynamic && "EST case not considered earlier." ) ? static_cast<void> (0) : __assert_fail ("EST == EST_Dynamic && \"EST case not considered earlier.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 210, __PRETTY_FUNCTION__)); | ||||||
211 | assert(ComputedEST != EST_None &&((ComputedEST != EST_None && "Shouldn't collect exceptions when throw-all is guaranteed." ) ? static_cast<void> (0) : __assert_fail ("ComputedEST != EST_None && \"Shouldn't collect exceptions when throw-all is guaranteed.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 212, __PRETTY_FUNCTION__)) | ||||||
212 | "Shouldn't collect exceptions when throw-all is guaranteed.")((ComputedEST != EST_None && "Shouldn't collect exceptions when throw-all is guaranteed." ) ? static_cast<void> (0) : __assert_fail ("ComputedEST != EST_None && \"Shouldn't collect exceptions when throw-all is guaranteed.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 212, __PRETTY_FUNCTION__)); | ||||||
213 | ComputedEST = EST_Dynamic; | ||||||
214 | // Record the exceptions in this function's exception specification. | ||||||
215 | for (const auto &E : Proto->exceptions()) | ||||||
216 | if (ExceptionsSeen.insert(Self->Context.getCanonicalType(E)).second) | ||||||
217 | Exceptions.push_back(E); | ||||||
218 | } | ||||||
219 | |||||||
220 | void Sema::ImplicitExceptionSpecification::CalledExpr(Expr *E) { | ||||||
221 | if (!E || ComputedEST == EST_MSAny) | ||||||
222 | return; | ||||||
223 | |||||||
224 | // FIXME: | ||||||
225 | // | ||||||
226 | // C++0x [except.spec]p14: | ||||||
227 | // [An] implicit exception-specification specifies the type-id T if and | ||||||
228 | // only if T is allowed by the exception-specification of a function directly | ||||||
229 | // invoked by f's implicit definition; f shall allow all exceptions if any | ||||||
230 | // function it directly invokes allows all exceptions, and f shall allow no | ||||||
231 | // exceptions if every function it directly invokes allows no exceptions. | ||||||
232 | // | ||||||
233 | // Note in particular that if an implicit exception-specification is generated | ||||||
234 | // for a function containing a throw-expression, that specification can still | ||||||
235 | // be noexcept(true). | ||||||
236 | // | ||||||
237 | // Note also that 'directly invoked' is not defined in the standard, and there | ||||||
238 | // is no indication that we should only consider potentially-evaluated calls. | ||||||
239 | // | ||||||
240 | // Ultimately we should implement the intent of the standard: the exception | ||||||
241 | // specification should be the set of exceptions which can be thrown by the | ||||||
242 | // implicit definition. For now, we assume that any non-nothrow expression can | ||||||
243 | // throw any exception. | ||||||
244 | |||||||
245 | if (Self->canThrow(E)) | ||||||
246 | ComputedEST = EST_None; | ||||||
247 | } | ||||||
248 | |||||||
249 | bool | ||||||
250 | Sema::SetParamDefaultArgument(ParmVarDecl *Param, Expr *Arg, | ||||||
251 | SourceLocation EqualLoc) { | ||||||
252 | if (RequireCompleteType(Param->getLocation(), Param->getType(), | ||||||
253 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
254 | Param->setInvalidDecl(); | ||||||
255 | return true; | ||||||
256 | } | ||||||
257 | |||||||
258 | // C++ [dcl.fct.default]p5 | ||||||
259 | // A default argument expression is implicitly converted (clause | ||||||
260 | // 4) to the parameter type. The default argument expression has | ||||||
261 | // the same semantic constraints as the initializer expression in | ||||||
262 | // a declaration of a variable of the parameter type, using the | ||||||
263 | // copy-initialization semantics (8.5). | ||||||
264 | InitializedEntity Entity = InitializedEntity::InitializeParameter(Context, | ||||||
265 | Param); | ||||||
266 | InitializationKind Kind = InitializationKind::CreateCopy(Param->getLocation(), | ||||||
267 | EqualLoc); | ||||||
268 | InitializationSequence InitSeq(*this, Entity, Kind, Arg); | ||||||
269 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Arg); | ||||||
270 | if (Result.isInvalid()) | ||||||
271 | return true; | ||||||
272 | Arg = Result.getAs<Expr>(); | ||||||
273 | |||||||
274 | CheckCompletedExpr(Arg, EqualLoc); | ||||||
275 | Arg = MaybeCreateExprWithCleanups(Arg); | ||||||
276 | |||||||
277 | // Okay: add the default argument to the parameter | ||||||
278 | Param->setDefaultArg(Arg); | ||||||
279 | |||||||
280 | // We have already instantiated this parameter; provide each of the | ||||||
281 | // instantiations with the uninstantiated default argument. | ||||||
282 | UnparsedDefaultArgInstantiationsMap::iterator InstPos | ||||||
283 | = UnparsedDefaultArgInstantiations.find(Param); | ||||||
284 | if (InstPos != UnparsedDefaultArgInstantiations.end()) { | ||||||
285 | for (unsigned I = 0, N = InstPos->second.size(); I != N; ++I) | ||||||
286 | InstPos->second[I]->setUninstantiatedDefaultArg(Arg); | ||||||
287 | |||||||
288 | // We're done tracking this parameter's instantiations. | ||||||
289 | UnparsedDefaultArgInstantiations.erase(InstPos); | ||||||
290 | } | ||||||
291 | |||||||
292 | return false; | ||||||
293 | } | ||||||
294 | |||||||
295 | /// ActOnParamDefaultArgument - Check whether the default argument | ||||||
296 | /// provided for a function parameter is well-formed. If so, attach it | ||||||
297 | /// to the parameter declaration. | ||||||
298 | void | ||||||
299 | Sema::ActOnParamDefaultArgument(Decl *param, SourceLocation EqualLoc, | ||||||
300 | Expr *DefaultArg) { | ||||||
301 | if (!param || !DefaultArg) | ||||||
302 | return; | ||||||
303 | |||||||
304 | ParmVarDecl *Param = cast<ParmVarDecl>(param); | ||||||
305 | UnparsedDefaultArgLocs.erase(Param); | ||||||
306 | |||||||
307 | // Default arguments are only permitted in C++ | ||||||
308 | if (!getLangOpts().CPlusPlus) { | ||||||
309 | Diag(EqualLoc, diag::err_param_default_argument) | ||||||
310 | << DefaultArg->getSourceRange(); | ||||||
311 | Param->setInvalidDecl(); | ||||||
312 | return; | ||||||
313 | } | ||||||
314 | |||||||
315 | // Check for unexpanded parameter packs. | ||||||
316 | if (DiagnoseUnexpandedParameterPack(DefaultArg, UPPC_DefaultArgument)) { | ||||||
317 | Param->setInvalidDecl(); | ||||||
318 | return; | ||||||
319 | } | ||||||
320 | |||||||
321 | // C++11 [dcl.fct.default]p3 | ||||||
322 | // A default argument expression [...] shall not be specified for a | ||||||
323 | // parameter pack. | ||||||
324 | if (Param->isParameterPack()) { | ||||||
325 | Diag(EqualLoc, diag::err_param_default_argument_on_parameter_pack) | ||||||
326 | << DefaultArg->getSourceRange(); | ||||||
327 | return; | ||||||
328 | } | ||||||
329 | |||||||
330 | // Check that the default argument is well-formed | ||||||
331 | CheckDefaultArgumentVisitor DefaultArgChecker(DefaultArg, this); | ||||||
332 | if (DefaultArgChecker.Visit(DefaultArg)) { | ||||||
333 | Param->setInvalidDecl(); | ||||||
334 | return; | ||||||
335 | } | ||||||
336 | |||||||
337 | SetParamDefaultArgument(Param, DefaultArg, EqualLoc); | ||||||
338 | } | ||||||
339 | |||||||
340 | /// ActOnParamUnparsedDefaultArgument - We've seen a default | ||||||
341 | /// argument for a function parameter, but we can't parse it yet | ||||||
342 | /// because we're inside a class definition. Note that this default | ||||||
343 | /// argument will be parsed later. | ||||||
344 | void Sema::ActOnParamUnparsedDefaultArgument(Decl *param, | ||||||
345 | SourceLocation EqualLoc, | ||||||
346 | SourceLocation ArgLoc) { | ||||||
347 | if (!param) | ||||||
348 | return; | ||||||
349 | |||||||
350 | ParmVarDecl *Param = cast<ParmVarDecl>(param); | ||||||
351 | Param->setUnparsedDefaultArg(); | ||||||
352 | UnparsedDefaultArgLocs[Param] = ArgLoc; | ||||||
353 | } | ||||||
354 | |||||||
355 | /// ActOnParamDefaultArgumentError - Parsing or semantic analysis of | ||||||
356 | /// the default argument for the parameter param failed. | ||||||
357 | void Sema::ActOnParamDefaultArgumentError(Decl *param, | ||||||
358 | SourceLocation EqualLoc) { | ||||||
359 | if (!param) | ||||||
360 | return; | ||||||
361 | |||||||
362 | ParmVarDecl *Param = cast<ParmVarDecl>(param); | ||||||
363 | Param->setInvalidDecl(); | ||||||
364 | UnparsedDefaultArgLocs.erase(Param); | ||||||
365 | Param->setDefaultArg(new(Context) | ||||||
366 | OpaqueValueExpr(EqualLoc, | ||||||
367 | Param->getType().getNonReferenceType(), | ||||||
368 | VK_RValue)); | ||||||
369 | } | ||||||
370 | |||||||
371 | /// CheckExtraCXXDefaultArguments - Check for any extra default | ||||||
372 | /// arguments in the declarator, which is not a function declaration | ||||||
373 | /// or definition and therefore is not permitted to have default | ||||||
374 | /// arguments. This routine should be invoked for every declarator | ||||||
375 | /// that is not a function declaration or definition. | ||||||
376 | void Sema::CheckExtraCXXDefaultArguments(Declarator &D) { | ||||||
377 | // C++ [dcl.fct.default]p3 | ||||||
378 | // A default argument expression shall be specified only in the | ||||||
379 | // parameter-declaration-clause of a function declaration or in a | ||||||
380 | // template-parameter (14.1). It shall not be specified for a | ||||||
381 | // parameter pack. If it is specified in a | ||||||
382 | // parameter-declaration-clause, it shall not occur within a | ||||||
383 | // declarator or abstract-declarator of a parameter-declaration. | ||||||
384 | bool MightBeFunction = D.isFunctionDeclarationContext(); | ||||||
385 | for (unsigned i = 0, e = D.getNumTypeObjects(); i != e; ++i) { | ||||||
386 | DeclaratorChunk &chunk = D.getTypeObject(i); | ||||||
387 | if (chunk.Kind == DeclaratorChunk::Function) { | ||||||
388 | if (MightBeFunction) { | ||||||
389 | // This is a function declaration. It can have default arguments, but | ||||||
390 | // keep looking in case its return type is a function type with default | ||||||
391 | // arguments. | ||||||
392 | MightBeFunction = false; | ||||||
393 | continue; | ||||||
394 | } | ||||||
395 | for (unsigned argIdx = 0, e = chunk.Fun.NumParams; argIdx != e; | ||||||
396 | ++argIdx) { | ||||||
397 | ParmVarDecl *Param = cast<ParmVarDecl>(chunk.Fun.Params[argIdx].Param); | ||||||
398 | if (Param->hasUnparsedDefaultArg()) { | ||||||
399 | std::unique_ptr<CachedTokens> Toks = | ||||||
400 | std::move(chunk.Fun.Params[argIdx].DefaultArgTokens); | ||||||
401 | SourceRange SR; | ||||||
402 | if (Toks->size() > 1) | ||||||
403 | SR = SourceRange((*Toks)[1].getLocation(), | ||||||
404 | Toks->back().getLocation()); | ||||||
405 | else | ||||||
406 | SR = UnparsedDefaultArgLocs[Param]; | ||||||
407 | Diag(Param->getLocation(), diag::err_param_default_argument_nonfunc) | ||||||
408 | << SR; | ||||||
409 | } else if (Param->getDefaultArg()) { | ||||||
410 | Diag(Param->getLocation(), diag::err_param_default_argument_nonfunc) | ||||||
411 | << Param->getDefaultArg()->getSourceRange(); | ||||||
412 | Param->setDefaultArg(nullptr); | ||||||
413 | } | ||||||
414 | } | ||||||
415 | } else if (chunk.Kind != DeclaratorChunk::Paren) { | ||||||
416 | MightBeFunction = false; | ||||||
417 | } | ||||||
418 | } | ||||||
419 | } | ||||||
420 | |||||||
421 | static bool functionDeclHasDefaultArgument(const FunctionDecl *FD) { | ||||||
422 | for (unsigned NumParams = FD->getNumParams(); NumParams > 0; --NumParams) { | ||||||
423 | const ParmVarDecl *PVD = FD->getParamDecl(NumParams-1); | ||||||
424 | if (!PVD->hasDefaultArg()) | ||||||
425 | return false; | ||||||
426 | if (!PVD->hasInheritedDefaultArg()) | ||||||
427 | return true; | ||||||
428 | } | ||||||
429 | return false; | ||||||
430 | } | ||||||
431 | |||||||
432 | /// MergeCXXFunctionDecl - Merge two declarations of the same C++ | ||||||
433 | /// function, once we already know that they have the same | ||||||
434 | /// type. Subroutine of MergeFunctionDecl. Returns true if there was an | ||||||
435 | /// error, false otherwise. | ||||||
436 | bool Sema::MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, | ||||||
437 | Scope *S) { | ||||||
438 | bool Invalid = false; | ||||||
439 | |||||||
440 | // The declaration context corresponding to the scope is the semantic | ||||||
441 | // parent, unless this is a local function declaration, in which case | ||||||
442 | // it is that surrounding function. | ||||||
443 | DeclContext *ScopeDC = New->isLocalExternDecl() | ||||||
444 | ? New->getLexicalDeclContext() | ||||||
445 | : New->getDeclContext(); | ||||||
446 | |||||||
447 | // Find the previous declaration for the purpose of default arguments. | ||||||
448 | FunctionDecl *PrevForDefaultArgs = Old; | ||||||
449 | for (/**/; PrevForDefaultArgs; | ||||||
450 | // Don't bother looking back past the latest decl if this is a local | ||||||
451 | // extern declaration; nothing else could work. | ||||||
452 | PrevForDefaultArgs = New->isLocalExternDecl() | ||||||
453 | ? nullptr | ||||||
454 | : PrevForDefaultArgs->getPreviousDecl()) { | ||||||
455 | // Ignore hidden declarations. | ||||||
456 | if (!LookupResult::isVisible(*this, PrevForDefaultArgs)) | ||||||
457 | continue; | ||||||
458 | |||||||
459 | if (S && !isDeclInScope(PrevForDefaultArgs, ScopeDC, S) && | ||||||
460 | !New->isCXXClassMember()) { | ||||||
461 | // Ignore default arguments of old decl if they are not in | ||||||
462 | // the same scope and this is not an out-of-line definition of | ||||||
463 | // a member function. | ||||||
464 | continue; | ||||||
465 | } | ||||||
466 | |||||||
467 | if (PrevForDefaultArgs->isLocalExternDecl() != New->isLocalExternDecl()) { | ||||||
468 | // If only one of these is a local function declaration, then they are | ||||||
469 | // declared in different scopes, even though isDeclInScope may think | ||||||
470 | // they're in the same scope. (If both are local, the scope check is | ||||||
471 | // sufficient, and if neither is local, then they are in the same scope.) | ||||||
472 | continue; | ||||||
473 | } | ||||||
474 | |||||||
475 | // We found the right previous declaration. | ||||||
476 | break; | ||||||
477 | } | ||||||
478 | |||||||
479 | // C++ [dcl.fct.default]p4: | ||||||
480 | // For non-template functions, default arguments can be added in | ||||||
481 | // later declarations of a function in the same | ||||||
482 | // scope. Declarations in different scopes have completely | ||||||
483 | // distinct sets of default arguments. That is, declarations in | ||||||
484 | // inner scopes do not acquire default arguments from | ||||||
485 | // declarations in outer scopes, and vice versa. In a given | ||||||
486 | // function declaration, all parameters subsequent to a | ||||||
487 | // parameter with a default argument shall have default | ||||||
488 | // arguments supplied in this or previous declarations. A | ||||||
489 | // default argument shall not be redefined by a later | ||||||
490 | // declaration (not even to the same value). | ||||||
491 | // | ||||||
492 | // C++ [dcl.fct.default]p6: | ||||||
493 | // Except for member functions of class templates, the default arguments | ||||||
494 | // in a member function definition that appears outside of the class | ||||||
495 | // definition are added to the set of default arguments provided by the | ||||||
496 | // member function declaration in the class definition. | ||||||
497 | for (unsigned p = 0, NumParams = PrevForDefaultArgs | ||||||
498 | ? PrevForDefaultArgs->getNumParams() | ||||||
499 | : 0; | ||||||
500 | p < NumParams; ++p) { | ||||||
501 | ParmVarDecl *OldParam = PrevForDefaultArgs->getParamDecl(p); | ||||||
502 | ParmVarDecl *NewParam = New->getParamDecl(p); | ||||||
503 | |||||||
504 | bool OldParamHasDfl = OldParam ? OldParam->hasDefaultArg() : false; | ||||||
505 | bool NewParamHasDfl = NewParam->hasDefaultArg(); | ||||||
506 | |||||||
507 | if (OldParamHasDfl && NewParamHasDfl) { | ||||||
508 | unsigned DiagDefaultParamID = | ||||||
509 | diag::err_param_default_argument_redefinition; | ||||||
510 | |||||||
511 | // MSVC accepts that default parameters be redefined for member functions | ||||||
512 | // of template class. The new default parameter's value is ignored. | ||||||
513 | Invalid = true; | ||||||
514 | if (getLangOpts().MicrosoftExt) { | ||||||
515 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(New); | ||||||
516 | if (MD && MD->getParent()->getDescribedClassTemplate()) { | ||||||
517 | // Merge the old default argument into the new parameter. | ||||||
518 | NewParam->setHasInheritedDefaultArg(); | ||||||
519 | if (OldParam->hasUninstantiatedDefaultArg()) | ||||||
520 | NewParam->setUninstantiatedDefaultArg( | ||||||
521 | OldParam->getUninstantiatedDefaultArg()); | ||||||
522 | else | ||||||
523 | NewParam->setDefaultArg(OldParam->getInit()); | ||||||
524 | DiagDefaultParamID = diag::ext_param_default_argument_redefinition; | ||||||
525 | Invalid = false; | ||||||
526 | } | ||||||
527 | } | ||||||
528 | |||||||
529 | // FIXME: If we knew where the '=' was, we could easily provide a fix-it | ||||||
530 | // hint here. Alternatively, we could walk the type-source information | ||||||
531 | // for NewParam to find the last source location in the type... but it | ||||||
532 | // isn't worth the effort right now. This is the kind of test case that | ||||||
533 | // is hard to get right: | ||||||
534 | // int f(int); | ||||||
535 | // void g(int (*fp)(int) = f); | ||||||
536 | // void g(int (*fp)(int) = &f); | ||||||
537 | Diag(NewParam->getLocation(), DiagDefaultParamID) | ||||||
538 | << NewParam->getDefaultArgRange(); | ||||||
539 | |||||||
540 | // Look for the function declaration where the default argument was | ||||||
541 | // actually written, which may be a declaration prior to Old. | ||||||
542 | for (auto Older = PrevForDefaultArgs; | ||||||
543 | OldParam->hasInheritedDefaultArg(); /**/) { | ||||||
544 | Older = Older->getPreviousDecl(); | ||||||
545 | OldParam = Older->getParamDecl(p); | ||||||
546 | } | ||||||
547 | |||||||
548 | Diag(OldParam->getLocation(), diag::note_previous_definition) | ||||||
549 | << OldParam->getDefaultArgRange(); | ||||||
550 | } else if (OldParamHasDfl) { | ||||||
551 | // Merge the old default argument into the new parameter unless the new | ||||||
552 | // function is a friend declaration in a template class. In the latter | ||||||
553 | // case the default arguments will be inherited when the friend | ||||||
554 | // declaration will be instantiated. | ||||||
555 | if (New->getFriendObjectKind() == Decl::FOK_None || | ||||||
556 | !New->getLexicalDeclContext()->isDependentContext()) { | ||||||
557 | // It's important to use getInit() here; getDefaultArg() | ||||||
558 | // strips off any top-level ExprWithCleanups. | ||||||
559 | NewParam->setHasInheritedDefaultArg(); | ||||||
560 | if (OldParam->hasUnparsedDefaultArg()) | ||||||
561 | NewParam->setUnparsedDefaultArg(); | ||||||
562 | else if (OldParam->hasUninstantiatedDefaultArg()) | ||||||
563 | NewParam->setUninstantiatedDefaultArg( | ||||||
564 | OldParam->getUninstantiatedDefaultArg()); | ||||||
565 | else | ||||||
566 | NewParam->setDefaultArg(OldParam->getInit()); | ||||||
567 | } | ||||||
568 | } else if (NewParamHasDfl) { | ||||||
569 | if (New->getDescribedFunctionTemplate()) { | ||||||
570 | // Paragraph 4, quoted above, only applies to non-template functions. | ||||||
571 | Diag(NewParam->getLocation(), | ||||||
572 | diag::err_param_default_argument_template_redecl) | ||||||
573 | << NewParam->getDefaultArgRange(); | ||||||
574 | Diag(PrevForDefaultArgs->getLocation(), | ||||||
575 | diag::note_template_prev_declaration) | ||||||
576 | << false; | ||||||
577 | } else if (New->getTemplateSpecializationKind() | ||||||
578 | != TSK_ImplicitInstantiation && | ||||||
579 | New->getTemplateSpecializationKind() != TSK_Undeclared) { | ||||||
580 | // C++ [temp.expr.spec]p21: | ||||||
581 | // Default function arguments shall not be specified in a declaration | ||||||
582 | // or a definition for one of the following explicit specializations: | ||||||
583 | // - the explicit specialization of a function template; | ||||||
584 | // - the explicit specialization of a member function template; | ||||||
585 | // - the explicit specialization of a member function of a class | ||||||
586 | // template where the class template specialization to which the | ||||||
587 | // member function specialization belongs is implicitly | ||||||
588 | // instantiated. | ||||||
589 | Diag(NewParam->getLocation(), diag::err_template_spec_default_arg) | ||||||
590 | << (New->getTemplateSpecializationKind() ==TSK_ExplicitSpecialization) | ||||||
591 | << New->getDeclName() | ||||||
592 | << NewParam->getDefaultArgRange(); | ||||||
593 | } else if (New->getDeclContext()->isDependentContext()) { | ||||||
594 | // C++ [dcl.fct.default]p6 (DR217): | ||||||
595 | // Default arguments for a member function of a class template shall | ||||||
596 | // be specified on the initial declaration of the member function | ||||||
597 | // within the class template. | ||||||
598 | // | ||||||
599 | // Reading the tea leaves a bit in DR217 and its reference to DR205 | ||||||
600 | // leads me to the conclusion that one cannot add default function | ||||||
601 | // arguments for an out-of-line definition of a member function of a | ||||||
602 | // dependent type. | ||||||
603 | int WhichKind = 2; | ||||||
604 | if (CXXRecordDecl *Record | ||||||
605 | = dyn_cast<CXXRecordDecl>(New->getDeclContext())) { | ||||||
606 | if (Record->getDescribedClassTemplate()) | ||||||
607 | WhichKind = 0; | ||||||
608 | else if (isa<ClassTemplatePartialSpecializationDecl>(Record)) | ||||||
609 | WhichKind = 1; | ||||||
610 | else | ||||||
611 | WhichKind = 2; | ||||||
612 | } | ||||||
613 | |||||||
614 | Diag(NewParam->getLocation(), | ||||||
615 | diag::err_param_default_argument_member_template_redecl) | ||||||
616 | << WhichKind | ||||||
617 | << NewParam->getDefaultArgRange(); | ||||||
618 | } | ||||||
619 | } | ||||||
620 | } | ||||||
621 | |||||||
622 | // DR1344: If a default argument is added outside a class definition and that | ||||||
623 | // default argument makes the function a special member function, the program | ||||||
624 | // is ill-formed. This can only happen for constructors. | ||||||
625 | if (isa<CXXConstructorDecl>(New) && | ||||||
626 | New->getMinRequiredArguments() < Old->getMinRequiredArguments()) { | ||||||
627 | CXXSpecialMember NewSM = getSpecialMember(cast<CXXMethodDecl>(New)), | ||||||
628 | OldSM = getSpecialMember(cast<CXXMethodDecl>(Old)); | ||||||
629 | if (NewSM != OldSM) { | ||||||
630 | ParmVarDecl *NewParam = New->getParamDecl(New->getMinRequiredArguments()); | ||||||
631 | assert(NewParam->hasDefaultArg())((NewParam->hasDefaultArg()) ? static_cast<void> (0) : __assert_fail ("NewParam->hasDefaultArg()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 631, __PRETTY_FUNCTION__)); | ||||||
632 | Diag(NewParam->getLocation(), diag::err_default_arg_makes_ctor_special) | ||||||
633 | << NewParam->getDefaultArgRange() << NewSM; | ||||||
634 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
635 | } | ||||||
636 | } | ||||||
637 | |||||||
638 | const FunctionDecl *Def; | ||||||
639 | // C++11 [dcl.constexpr]p1: If any declaration of a function or function | ||||||
640 | // template has a constexpr specifier then all its declarations shall | ||||||
641 | // contain the constexpr specifier. | ||||||
642 | if (New->getConstexprKind() != Old->getConstexprKind()) { | ||||||
643 | Diag(New->getLocation(), diag::err_constexpr_redecl_mismatch) | ||||||
644 | << New << New->getConstexprKind() << Old->getConstexprKind(); | ||||||
645 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
646 | Invalid = true; | ||||||
647 | } else if (!Old->getMostRecentDecl()->isInlined() && New->isInlined() && | ||||||
648 | Old->isDefined(Def) && | ||||||
649 | // If a friend function is inlined but does not have 'inline' | ||||||
650 | // specifier, it is a definition. Do not report attribute conflict | ||||||
651 | // in this case, redefinition will be diagnosed later. | ||||||
652 | (New->isInlineSpecified() || | ||||||
653 | New->getFriendObjectKind() == Decl::FOK_None)) { | ||||||
654 | // C++11 [dcl.fcn.spec]p4: | ||||||
655 | // If the definition of a function appears in a translation unit before its | ||||||
656 | // first declaration as inline, the program is ill-formed. | ||||||
657 | Diag(New->getLocation(), diag::err_inline_decl_follows_def) << New; | ||||||
658 | Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
659 | Invalid = true; | ||||||
660 | } | ||||||
661 | |||||||
662 | // C++17 [temp.deduct.guide]p3: | ||||||
663 | // Two deduction guide declarations in the same translation unit | ||||||
664 | // for the same class template shall not have equivalent | ||||||
665 | // parameter-declaration-clauses. | ||||||
666 | if (isa<CXXDeductionGuideDecl>(New) && | ||||||
667 | !New->isFunctionTemplateSpecialization()) { | ||||||
668 | Diag(New->getLocation(), diag::err_deduction_guide_redeclared); | ||||||
669 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
670 | } | ||||||
671 | |||||||
672 | // C++11 [dcl.fct.default]p4: If a friend declaration specifies a default | ||||||
673 | // argument expression, that declaration shall be a definition and shall be | ||||||
674 | // the only declaration of the function or function template in the | ||||||
675 | // translation unit. | ||||||
676 | if (Old->getFriendObjectKind() == Decl::FOK_Undeclared && | ||||||
677 | functionDeclHasDefaultArgument(Old)) { | ||||||
678 | Diag(New->getLocation(), diag::err_friend_decl_with_def_arg_redeclared); | ||||||
679 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
680 | Invalid = true; | ||||||
681 | } | ||||||
682 | |||||||
683 | return Invalid; | ||||||
684 | } | ||||||
685 | |||||||
686 | NamedDecl * | ||||||
687 | Sema::ActOnDecompositionDeclarator(Scope *S, Declarator &D, | ||||||
688 | MultiTemplateParamsArg TemplateParamLists) { | ||||||
689 | assert(D.isDecompositionDeclarator())((D.isDecompositionDeclarator()) ? static_cast<void> (0 ) : __assert_fail ("D.isDecompositionDeclarator()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 689, __PRETTY_FUNCTION__)); | ||||||
690 | const DecompositionDeclarator &Decomp = D.getDecompositionDeclarator(); | ||||||
691 | |||||||
692 | // The syntax only allows a decomposition declarator as a simple-declaration, | ||||||
693 | // a for-range-declaration, or a condition in Clang, but we parse it in more | ||||||
694 | // cases than that. | ||||||
695 | if (!D.mayHaveDecompositionDeclarator()) { | ||||||
696 | Diag(Decomp.getLSquareLoc(), diag::err_decomp_decl_context) | ||||||
697 | << Decomp.getSourceRange(); | ||||||
698 | return nullptr; | ||||||
699 | } | ||||||
700 | |||||||
701 | if (!TemplateParamLists.empty()) { | ||||||
702 | // FIXME: There's no rule against this, but there are also no rules that | ||||||
703 | // would actually make it usable, so we reject it for now. | ||||||
704 | Diag(TemplateParamLists.front()->getTemplateLoc(), | ||||||
705 | diag::err_decomp_decl_template); | ||||||
706 | return nullptr; | ||||||
707 | } | ||||||
708 | |||||||
709 | Diag(Decomp.getLSquareLoc(), | ||||||
710 | !getLangOpts().CPlusPlus17 | ||||||
711 | ? diag::ext_decomp_decl | ||||||
712 | : D.getContext() == DeclaratorContext::ConditionContext | ||||||
713 | ? diag::ext_decomp_decl_cond | ||||||
714 | : diag::warn_cxx14_compat_decomp_decl) | ||||||
715 | << Decomp.getSourceRange(); | ||||||
716 | |||||||
717 | // The semantic context is always just the current context. | ||||||
718 | DeclContext *const DC = CurContext; | ||||||
719 | |||||||
720 | // C++17 [dcl.dcl]/8: | ||||||
721 | // The decl-specifier-seq shall contain only the type-specifier auto | ||||||
722 | // and cv-qualifiers. | ||||||
723 | // C++2a [dcl.dcl]/8: | ||||||
724 | // If decl-specifier-seq contains any decl-specifier other than static, | ||||||
725 | // thread_local, auto, or cv-qualifiers, the program is ill-formed. | ||||||
726 | auto &DS = D.getDeclSpec(); | ||||||
727 | { | ||||||
728 | SmallVector<StringRef, 8> BadSpecifiers; | ||||||
729 | SmallVector<SourceLocation, 8> BadSpecifierLocs; | ||||||
730 | SmallVector<StringRef, 8> CPlusPlus20Specifiers; | ||||||
731 | SmallVector<SourceLocation, 8> CPlusPlus20SpecifierLocs; | ||||||
732 | if (auto SCS = DS.getStorageClassSpec()) { | ||||||
733 | if (SCS == DeclSpec::SCS_static) { | ||||||
734 | CPlusPlus20Specifiers.push_back(DeclSpec::getSpecifierName(SCS)); | ||||||
735 | CPlusPlus20SpecifierLocs.push_back(DS.getStorageClassSpecLoc()); | ||||||
736 | } else { | ||||||
737 | BadSpecifiers.push_back(DeclSpec::getSpecifierName(SCS)); | ||||||
738 | BadSpecifierLocs.push_back(DS.getStorageClassSpecLoc()); | ||||||
739 | } | ||||||
740 | } | ||||||
741 | if (auto TSCS = DS.getThreadStorageClassSpec()) { | ||||||
742 | CPlusPlus20Specifiers.push_back(DeclSpec::getSpecifierName(TSCS)); | ||||||
743 | CPlusPlus20SpecifierLocs.push_back(DS.getThreadStorageClassSpecLoc()); | ||||||
744 | } | ||||||
745 | if (DS.hasConstexprSpecifier()) { | ||||||
746 | BadSpecifiers.push_back( | ||||||
747 | DeclSpec::getSpecifierName(DS.getConstexprSpecifier())); | ||||||
748 | BadSpecifierLocs.push_back(DS.getConstexprSpecLoc()); | ||||||
749 | } | ||||||
750 | if (DS.isInlineSpecified()) { | ||||||
751 | BadSpecifiers.push_back("inline"); | ||||||
752 | BadSpecifierLocs.push_back(DS.getInlineSpecLoc()); | ||||||
753 | } | ||||||
754 | if (!BadSpecifiers.empty()) { | ||||||
755 | auto &&Err = Diag(BadSpecifierLocs.front(), diag::err_decomp_decl_spec); | ||||||
756 | Err << (int)BadSpecifiers.size() | ||||||
757 | << llvm::join(BadSpecifiers.begin(), BadSpecifiers.end(), " "); | ||||||
758 | // Don't add FixItHints to remove the specifiers; we do still respect | ||||||
759 | // them when building the underlying variable. | ||||||
760 | for (auto Loc : BadSpecifierLocs) | ||||||
761 | Err << SourceRange(Loc, Loc); | ||||||
762 | } else if (!CPlusPlus20Specifiers.empty()) { | ||||||
763 | auto &&Warn = Diag(CPlusPlus20SpecifierLocs.front(), | ||||||
764 | getLangOpts().CPlusPlus2a | ||||||
765 | ? diag::warn_cxx17_compat_decomp_decl_spec | ||||||
766 | : diag::ext_decomp_decl_spec); | ||||||
767 | Warn << (int)CPlusPlus20Specifiers.size() | ||||||
768 | << llvm::join(CPlusPlus20Specifiers.begin(), | ||||||
769 | CPlusPlus20Specifiers.end(), " "); | ||||||
770 | for (auto Loc : CPlusPlus20SpecifierLocs) | ||||||
771 | Warn << SourceRange(Loc, Loc); | ||||||
772 | } | ||||||
773 | // We can't recover from it being declared as a typedef. | ||||||
774 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||||
775 | return nullptr; | ||||||
776 | } | ||||||
777 | |||||||
778 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
779 | QualType R = TInfo->getType(); | ||||||
780 | |||||||
781 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
782 | UPPC_DeclarationType)) | ||||||
783 | D.setInvalidType(); | ||||||
784 | |||||||
785 | // The syntax only allows a single ref-qualifier prior to the decomposition | ||||||
786 | // declarator. No other declarator chunks are permitted. Also check the type | ||||||
787 | // specifier here. | ||||||
788 | if (DS.getTypeSpecType() != DeclSpec::TST_auto || | ||||||
789 | D.hasGroupingParens() || D.getNumTypeObjects() > 1 || | ||||||
790 | (D.getNumTypeObjects() == 1 && | ||||||
791 | D.getTypeObject(0).Kind != DeclaratorChunk::Reference)) { | ||||||
792 | Diag(Decomp.getLSquareLoc(), | ||||||
793 | (D.hasGroupingParens() || | ||||||
794 | (D.getNumTypeObjects() && | ||||||
795 | D.getTypeObject(0).Kind == DeclaratorChunk::Paren)) | ||||||
796 | ? diag::err_decomp_decl_parens | ||||||
797 | : diag::err_decomp_decl_type) | ||||||
798 | << R; | ||||||
799 | |||||||
800 | // In most cases, there's no actual problem with an explicitly-specified | ||||||
801 | // type, but a function type won't work here, and ActOnVariableDeclarator | ||||||
802 | // shouldn't be called for such a type. | ||||||
803 | if (R->isFunctionType()) | ||||||
804 | D.setInvalidType(); | ||||||
805 | } | ||||||
806 | |||||||
807 | // Build the BindingDecls. | ||||||
808 | SmallVector<BindingDecl*, 8> Bindings; | ||||||
809 | |||||||
810 | // Build the BindingDecls. | ||||||
811 | for (auto &B : D.getDecompositionDeclarator().bindings()) { | ||||||
812 | // Check for name conflicts. | ||||||
813 | DeclarationNameInfo NameInfo(B.Name, B.NameLoc); | ||||||
814 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||
815 | ForVisibleRedeclaration); | ||||||
816 | LookupName(Previous, S, | ||||||
817 | /*CreateBuiltins*/DC->getRedeclContext()->isTranslationUnit()); | ||||||
818 | |||||||
819 | // It's not permitted to shadow a template parameter name. | ||||||
820 | if (Previous.isSingleResult() && | ||||||
821 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||
822 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), | ||||||
823 | Previous.getFoundDecl()); | ||||||
824 | Previous.clear(); | ||||||
825 | } | ||||||
826 | |||||||
827 | bool ConsiderLinkage = DC->isFunctionOrMethod() && | ||||||
828 | DS.getStorageClassSpec() == DeclSpec::SCS_extern; | ||||||
829 | FilterLookupForScope(Previous, DC, S, ConsiderLinkage, | ||||||
830 | /*AllowInlineNamespace*/false); | ||||||
831 | if (!Previous.empty()) { | ||||||
832 | auto *Old = Previous.getRepresentativeDecl(); | ||||||
833 | Diag(B.NameLoc, diag::err_redefinition) << B.Name; | ||||||
834 | Diag(Old->getLocation(), diag::note_previous_definition); | ||||||
835 | } | ||||||
836 | |||||||
837 | auto *BD = BindingDecl::Create(Context, DC, B.NameLoc, B.Name); | ||||||
838 | PushOnScopeChains(BD, S, true); | ||||||
839 | Bindings.push_back(BD); | ||||||
840 | ParsingInitForAutoVars.insert(BD); | ||||||
841 | } | ||||||
842 | |||||||
843 | // There are no prior lookup results for the variable itself, because it | ||||||
844 | // is unnamed. | ||||||
845 | DeclarationNameInfo NameInfo((IdentifierInfo *)nullptr, | ||||||
846 | Decomp.getLSquareLoc()); | ||||||
847 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||
848 | ForVisibleRedeclaration); | ||||||
849 | |||||||
850 | // Build the variable that holds the non-decomposed object. | ||||||
851 | bool AddToScope = true; | ||||||
852 | NamedDecl *New = | ||||||
853 | ActOnVariableDeclarator(S, D, DC, TInfo, Previous, | ||||||
854 | MultiTemplateParamsArg(), AddToScope, Bindings); | ||||||
855 | if (AddToScope) { | ||||||
856 | S->AddDecl(New); | ||||||
857 | CurContext->addHiddenDecl(New); | ||||||
858 | } | ||||||
859 | |||||||
860 | if (isInOpenMPDeclareTargetContext()) | ||||||
861 | checkDeclIsAllowedInOpenMPTarget(nullptr, New); | ||||||
862 | |||||||
863 | return New; | ||||||
864 | } | ||||||
865 | |||||||
866 | static bool checkSimpleDecomposition( | ||||||
867 | Sema &S, ArrayRef<BindingDecl *> Bindings, ValueDecl *Src, | ||||||
868 | QualType DecompType, const llvm::APSInt &NumElems, QualType ElemType, | ||||||
869 | llvm::function_ref<ExprResult(SourceLocation, Expr *, unsigned)> GetInit) { | ||||||
870 | if ((int64_t)Bindings.size() != NumElems) { | ||||||
871 | S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings) | ||||||
872 | << DecompType << (unsigned)Bindings.size() << NumElems.toString(10) | ||||||
873 | << (NumElems < Bindings.size()); | ||||||
874 | return true; | ||||||
875 | } | ||||||
876 | |||||||
877 | unsigned I = 0; | ||||||
878 | for (auto *B : Bindings) { | ||||||
879 | SourceLocation Loc = B->getLocation(); | ||||||
880 | ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc); | ||||||
881 | if (E.isInvalid()) | ||||||
882 | return true; | ||||||
883 | E = GetInit(Loc, E.get(), I++); | ||||||
884 | if (E.isInvalid()) | ||||||
885 | return true; | ||||||
886 | B->setBinding(ElemType, E.get()); | ||||||
887 | } | ||||||
888 | |||||||
889 | return false; | ||||||
890 | } | ||||||
891 | |||||||
892 | static bool checkArrayLikeDecomposition(Sema &S, | ||||||
893 | ArrayRef<BindingDecl *> Bindings, | ||||||
894 | ValueDecl *Src, QualType DecompType, | ||||||
895 | const llvm::APSInt &NumElems, | ||||||
896 | QualType ElemType) { | ||||||
897 | return checkSimpleDecomposition( | ||||||
898 | S, Bindings, Src, DecompType, NumElems, ElemType, | ||||||
899 | [&](SourceLocation Loc, Expr *Base, unsigned I) -> ExprResult { | ||||||
900 | ExprResult E = S.ActOnIntegerConstant(Loc, I); | ||||||
901 | if (E.isInvalid()) | ||||||
902 | return ExprError(); | ||||||
903 | return S.CreateBuiltinArraySubscriptExpr(Base, Loc, E.get(), Loc); | ||||||
904 | }); | ||||||
905 | } | ||||||
906 | |||||||
907 | static bool checkArrayDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings, | ||||||
908 | ValueDecl *Src, QualType DecompType, | ||||||
909 | const ConstantArrayType *CAT) { | ||||||
910 | return checkArrayLikeDecomposition(S, Bindings, Src, DecompType, | ||||||
911 | llvm::APSInt(CAT->getSize()), | ||||||
912 | CAT->getElementType()); | ||||||
913 | } | ||||||
914 | |||||||
915 | static bool checkVectorDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings, | ||||||
916 | ValueDecl *Src, QualType DecompType, | ||||||
917 | const VectorType *VT) { | ||||||
918 | return checkArrayLikeDecomposition( | ||||||
919 | S, Bindings, Src, DecompType, llvm::APSInt::get(VT->getNumElements()), | ||||||
920 | S.Context.getQualifiedType(VT->getElementType(), | ||||||
921 | DecompType.getQualifiers())); | ||||||
922 | } | ||||||
923 | |||||||
924 | static bool checkComplexDecomposition(Sema &S, | ||||||
925 | ArrayRef<BindingDecl *> Bindings, | ||||||
926 | ValueDecl *Src, QualType DecompType, | ||||||
927 | const ComplexType *CT) { | ||||||
928 | return checkSimpleDecomposition( | ||||||
929 | S, Bindings, Src, DecompType, llvm::APSInt::get(2), | ||||||
930 | S.Context.getQualifiedType(CT->getElementType(), | ||||||
931 | DecompType.getQualifiers()), | ||||||
932 | [&](SourceLocation Loc, Expr *Base, unsigned I) -> ExprResult { | ||||||
933 | return S.CreateBuiltinUnaryOp(Loc, I ? UO_Imag : UO_Real, Base); | ||||||
934 | }); | ||||||
935 | } | ||||||
936 | |||||||
937 | static std::string printTemplateArgs(const PrintingPolicy &PrintingPolicy, | ||||||
938 | TemplateArgumentListInfo &Args) { | ||||||
939 | SmallString<128> SS; | ||||||
940 | llvm::raw_svector_ostream OS(SS); | ||||||
941 | bool First = true; | ||||||
942 | for (auto &Arg : Args.arguments()) { | ||||||
943 | if (!First) | ||||||
944 | OS << ", "; | ||||||
945 | Arg.getArgument().print(PrintingPolicy, OS); | ||||||
946 | First = false; | ||||||
947 | } | ||||||
948 | return OS.str(); | ||||||
949 | } | ||||||
950 | |||||||
951 | static bool lookupStdTypeTraitMember(Sema &S, LookupResult &TraitMemberLookup, | ||||||
952 | SourceLocation Loc, StringRef Trait, | ||||||
953 | TemplateArgumentListInfo &Args, | ||||||
954 | unsigned DiagID) { | ||||||
955 | auto DiagnoseMissing = [&] { | ||||||
956 | if (DiagID) | ||||||
957 | S.Diag(Loc, DiagID) << printTemplateArgs(S.Context.getPrintingPolicy(), | ||||||
958 | Args); | ||||||
959 | return true; | ||||||
960 | }; | ||||||
961 | |||||||
962 | // FIXME: Factor out duplication with lookupPromiseType in SemaCoroutine. | ||||||
963 | NamespaceDecl *Std = S.getStdNamespace(); | ||||||
964 | if (!Std) | ||||||
965 | return DiagnoseMissing(); | ||||||
966 | |||||||
967 | // Look up the trait itself, within namespace std. We can diagnose various | ||||||
968 | // problems with this lookup even if we've been asked to not diagnose a | ||||||
969 | // missing specialization, because this can only fail if the user has been | ||||||
970 | // declaring their own names in namespace std or we don't support the | ||||||
971 | // standard library implementation in use. | ||||||
972 | LookupResult Result(S, &S.PP.getIdentifierTable().get(Trait), | ||||||
973 | Loc, Sema::LookupOrdinaryName); | ||||||
974 | if (!S.LookupQualifiedName(Result, Std)) | ||||||
975 | return DiagnoseMissing(); | ||||||
976 | if (Result.isAmbiguous()) | ||||||
977 | return true; | ||||||
978 | |||||||
979 | ClassTemplateDecl *TraitTD = Result.getAsSingle<ClassTemplateDecl>(); | ||||||
980 | if (!TraitTD) { | ||||||
981 | Result.suppressDiagnostics(); | ||||||
982 | NamedDecl *Found = *Result.begin(); | ||||||
983 | S.Diag(Loc, diag::err_std_type_trait_not_class_template) << Trait; | ||||||
984 | S.Diag(Found->getLocation(), diag::note_declared_at); | ||||||
985 | return true; | ||||||
986 | } | ||||||
987 | |||||||
988 | // Build the template-id. | ||||||
989 | QualType TraitTy = S.CheckTemplateIdType(TemplateName(TraitTD), Loc, Args); | ||||||
990 | if (TraitTy.isNull()) | ||||||
991 | return true; | ||||||
992 | if (!S.isCompleteType(Loc, TraitTy)) { | ||||||
993 | if (DiagID) | ||||||
994 | S.RequireCompleteType( | ||||||
995 | Loc, TraitTy, DiagID, | ||||||
996 | printTemplateArgs(S.Context.getPrintingPolicy(), Args)); | ||||||
997 | return true; | ||||||
998 | } | ||||||
999 | |||||||
1000 | CXXRecordDecl *RD = TraitTy->getAsCXXRecordDecl(); | ||||||
1001 | assert(RD && "specialization of class template is not a class?")((RD && "specialization of class template is not a class?" ) ? static_cast<void> (0) : __assert_fail ("RD && \"specialization of class template is not a class?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 1001, __PRETTY_FUNCTION__)); | ||||||
1002 | |||||||
1003 | // Look up the member of the trait type. | ||||||
1004 | S.LookupQualifiedName(TraitMemberLookup, RD); | ||||||
1005 | return TraitMemberLookup.isAmbiguous(); | ||||||
1006 | } | ||||||
1007 | |||||||
1008 | static TemplateArgumentLoc | ||||||
1009 | getTrivialIntegralTemplateArgument(Sema &S, SourceLocation Loc, QualType T, | ||||||
1010 | uint64_t I) { | ||||||
1011 | TemplateArgument Arg(S.Context, S.Context.MakeIntValue(I, T), T); | ||||||
1012 | return S.getTrivialTemplateArgumentLoc(Arg, T, Loc); | ||||||
1013 | } | ||||||
1014 | |||||||
1015 | static TemplateArgumentLoc | ||||||
1016 | getTrivialTypeTemplateArgument(Sema &S, SourceLocation Loc, QualType T) { | ||||||
1017 | return S.getTrivialTemplateArgumentLoc(TemplateArgument(T), QualType(), Loc); | ||||||
1018 | } | ||||||
1019 | |||||||
1020 | namespace { enum class IsTupleLike { TupleLike, NotTupleLike, Error }; } | ||||||
1021 | |||||||
1022 | static IsTupleLike isTupleLike(Sema &S, SourceLocation Loc, QualType T, | ||||||
1023 | llvm::APSInt &Size) { | ||||||
1024 | EnterExpressionEvaluationContext ContextRAII( | ||||||
1025 | S, Sema::ExpressionEvaluationContext::ConstantEvaluated); | ||||||
1026 | |||||||
1027 | DeclarationName Value = S.PP.getIdentifierInfo("value"); | ||||||
1028 | LookupResult R(S, Value, Loc, Sema::LookupOrdinaryName); | ||||||
1029 | |||||||
1030 | // Form template argument list for tuple_size<T>. | ||||||
1031 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||
1032 | Args.addArgument(getTrivialTypeTemplateArgument(S, Loc, T)); | ||||||
1033 | |||||||
1034 | // If there's no tuple_size specialization or the lookup of 'value' is empty, | ||||||
1035 | // it's not tuple-like. | ||||||
1036 | if (lookupStdTypeTraitMember(S, R, Loc, "tuple_size", Args, /*DiagID*/ 0) || | ||||||
1037 | R.empty()) | ||||||
1038 | return IsTupleLike::NotTupleLike; | ||||||
1039 | |||||||
1040 | // If we get this far, we've committed to the tuple interpretation, but | ||||||
1041 | // we can still fail if there actually isn't a usable ::value. | ||||||
1042 | |||||||
1043 | struct ICEDiagnoser : Sema::VerifyICEDiagnoser { | ||||||
1044 | LookupResult &R; | ||||||
1045 | TemplateArgumentListInfo &Args; | ||||||
1046 | ICEDiagnoser(LookupResult &R, TemplateArgumentListInfo &Args) | ||||||
1047 | : R(R), Args(Args) {} | ||||||
1048 | void diagnoseNotICE(Sema &S, SourceLocation Loc, SourceRange SR) { | ||||||
1049 | S.Diag(Loc, diag::err_decomp_decl_std_tuple_size_not_constant) | ||||||
1050 | << printTemplateArgs(S.Context.getPrintingPolicy(), Args); | ||||||
1051 | } | ||||||
1052 | } Diagnoser(R, Args); | ||||||
1053 | |||||||
1054 | ExprResult E = | ||||||
1055 | S.BuildDeclarationNameExpr(CXXScopeSpec(), R, /*NeedsADL*/false); | ||||||
1056 | if (E.isInvalid()) | ||||||
1057 | return IsTupleLike::Error; | ||||||
1058 | |||||||
1059 | E = S.VerifyIntegerConstantExpression(E.get(), &Size, Diagnoser, false); | ||||||
1060 | if (E.isInvalid()) | ||||||
1061 | return IsTupleLike::Error; | ||||||
1062 | |||||||
1063 | return IsTupleLike::TupleLike; | ||||||
1064 | } | ||||||
1065 | |||||||
1066 | /// \return std::tuple_element<I, T>::type. | ||||||
1067 | static QualType getTupleLikeElementType(Sema &S, SourceLocation Loc, | ||||||
1068 | unsigned I, QualType T) { | ||||||
1069 | // Form template argument list for tuple_element<I, T>. | ||||||
1070 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||
1071 | Args.addArgument( | ||||||
1072 | getTrivialIntegralTemplateArgument(S, Loc, S.Context.getSizeType(), I)); | ||||||
1073 | Args.addArgument(getTrivialTypeTemplateArgument(S, Loc, T)); | ||||||
1074 | |||||||
1075 | DeclarationName TypeDN = S.PP.getIdentifierInfo("type"); | ||||||
1076 | LookupResult R(S, TypeDN, Loc, Sema::LookupOrdinaryName); | ||||||
1077 | if (lookupStdTypeTraitMember( | ||||||
1078 | S, R, Loc, "tuple_element", Args, | ||||||
1079 | diag::err_decomp_decl_std_tuple_element_not_specialized)) | ||||||
1080 | return QualType(); | ||||||
1081 | |||||||
1082 | auto *TD = R.getAsSingle<TypeDecl>(); | ||||||
1083 | if (!TD) { | ||||||
1084 | R.suppressDiagnostics(); | ||||||
1085 | S.Diag(Loc, diag::err_decomp_decl_std_tuple_element_not_specialized) | ||||||
1086 | << printTemplateArgs(S.Context.getPrintingPolicy(), Args); | ||||||
1087 | if (!R.empty()) | ||||||
1088 | S.Diag(R.getRepresentativeDecl()->getLocation(), diag::note_declared_at); | ||||||
1089 | return QualType(); | ||||||
1090 | } | ||||||
1091 | |||||||
1092 | return S.Context.getTypeDeclType(TD); | ||||||
1093 | } | ||||||
1094 | |||||||
1095 | namespace { | ||||||
1096 | struct BindingDiagnosticTrap { | ||||||
1097 | Sema &S; | ||||||
1098 | DiagnosticErrorTrap Trap; | ||||||
1099 | BindingDecl *BD; | ||||||
1100 | |||||||
1101 | BindingDiagnosticTrap(Sema &S, BindingDecl *BD) | ||||||
1102 | : S(S), Trap(S.Diags), BD(BD) {} | ||||||
1103 | ~BindingDiagnosticTrap() { | ||||||
1104 | if (Trap.hasErrorOccurred()) | ||||||
1105 | S.Diag(BD->getLocation(), diag::note_in_binding_decl_init) << BD; | ||||||
1106 | } | ||||||
1107 | }; | ||||||
1108 | } | ||||||
1109 | |||||||
1110 | static bool checkTupleLikeDecomposition(Sema &S, | ||||||
1111 | ArrayRef<BindingDecl *> Bindings, | ||||||
1112 | VarDecl *Src, QualType DecompType, | ||||||
1113 | const llvm::APSInt &TupleSize) { | ||||||
1114 | if ((int64_t)Bindings.size() != TupleSize) { | ||||||
1115 | S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings) | ||||||
1116 | << DecompType << (unsigned)Bindings.size() << TupleSize.toString(10) | ||||||
1117 | << (TupleSize < Bindings.size()); | ||||||
1118 | return true; | ||||||
1119 | } | ||||||
1120 | |||||||
1121 | if (Bindings.empty()) | ||||||
1122 | return false; | ||||||
1123 | |||||||
1124 | DeclarationName GetDN = S.PP.getIdentifierInfo("get"); | ||||||
1125 | |||||||
1126 | // [dcl.decomp]p3: | ||||||
1127 | // The unqualified-id get is looked up in the scope of E by class member | ||||||
1128 | // access lookup ... | ||||||
1129 | LookupResult MemberGet(S, GetDN, Src->getLocation(), Sema::LookupMemberName); | ||||||
1130 | bool UseMemberGet = false; | ||||||
1131 | if (S.isCompleteType(Src->getLocation(), DecompType)) { | ||||||
1132 | if (auto *RD = DecompType->getAsCXXRecordDecl()) | ||||||
1133 | S.LookupQualifiedName(MemberGet, RD); | ||||||
1134 | if (MemberGet.isAmbiguous()) | ||||||
1135 | return true; | ||||||
1136 | // ... and if that finds at least one declaration that is a function | ||||||
1137 | // template whose first template parameter is a non-type parameter ... | ||||||
1138 | for (NamedDecl *D : MemberGet) { | ||||||
1139 | if (FunctionTemplateDecl *FTD = | ||||||
1140 | dyn_cast<FunctionTemplateDecl>(D->getUnderlyingDecl())) { | ||||||
1141 | TemplateParameterList *TPL = FTD->getTemplateParameters(); | ||||||
1142 | if (TPL->size() != 0 && | ||||||
1143 | isa<NonTypeTemplateParmDecl>(TPL->getParam(0))) { | ||||||
1144 | // ... the initializer is e.get<i>(). | ||||||
1145 | UseMemberGet = true; | ||||||
1146 | break; | ||||||
1147 | } | ||||||
1148 | } | ||||||
1149 | } | ||||||
1150 | } | ||||||
1151 | |||||||
1152 | unsigned I = 0; | ||||||
1153 | for (auto *B : Bindings) { | ||||||
1154 | BindingDiagnosticTrap Trap(S, B); | ||||||
1155 | SourceLocation Loc = B->getLocation(); | ||||||
1156 | |||||||
1157 | ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc); | ||||||
1158 | if (E.isInvalid()) | ||||||
1159 | return true; | ||||||
1160 | |||||||
1161 | // e is an lvalue if the type of the entity is an lvalue reference and | ||||||
1162 | // an xvalue otherwise | ||||||
1163 | if (!Src->getType()->isLValueReferenceType()) | ||||||
1164 | E = ImplicitCastExpr::Create(S.Context, E.get()->getType(), CK_NoOp, | ||||||
1165 | E.get(), nullptr, VK_XValue); | ||||||
1166 | |||||||
1167 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||
1168 | Args.addArgument( | ||||||
1169 | getTrivialIntegralTemplateArgument(S, Loc, S.Context.getSizeType(), I)); | ||||||
1170 | |||||||
1171 | if (UseMemberGet) { | ||||||
1172 | // if [lookup of member get] finds at least one declaration, the | ||||||
1173 | // initializer is e.get<i-1>(). | ||||||
1174 | E = S.BuildMemberReferenceExpr(E.get(), DecompType, Loc, false, | ||||||
1175 | CXXScopeSpec(), SourceLocation(), nullptr, | ||||||
1176 | MemberGet, &Args, nullptr); | ||||||
1177 | if (E.isInvalid()) | ||||||
1178 | return true; | ||||||
1179 | |||||||
1180 | E = S.BuildCallExpr(nullptr, E.get(), Loc, None, Loc); | ||||||
1181 | } else { | ||||||
1182 | // Otherwise, the initializer is get<i-1>(e), where get is looked up | ||||||
1183 | // in the associated namespaces. | ||||||
1184 | Expr *Get = UnresolvedLookupExpr::Create( | ||||||
1185 | S.Context, nullptr, NestedNameSpecifierLoc(), SourceLocation(), | ||||||
1186 | DeclarationNameInfo(GetDN, Loc), /*RequiresADL*/true, &Args, | ||||||
1187 | UnresolvedSetIterator(), UnresolvedSetIterator()); | ||||||
1188 | |||||||
1189 | Expr *Arg = E.get(); | ||||||
1190 | E = S.BuildCallExpr(nullptr, Get, Loc, Arg, Loc); | ||||||
1191 | } | ||||||
1192 | if (E.isInvalid()) | ||||||
1193 | return true; | ||||||
1194 | Expr *Init = E.get(); | ||||||
1195 | |||||||
1196 | // Given the type T designated by std::tuple_element<i - 1, E>::type, | ||||||
1197 | QualType T = getTupleLikeElementType(S, Loc, I, DecompType); | ||||||
1198 | if (T.isNull()) | ||||||
1199 | return true; | ||||||
1200 | |||||||
1201 | // each vi is a variable of type "reference to T" initialized with the | ||||||
1202 | // initializer, where the reference is an lvalue reference if the | ||||||
1203 | // initializer is an lvalue and an rvalue reference otherwise | ||||||
1204 | QualType RefType = | ||||||
1205 | S.BuildReferenceType(T, E.get()->isLValue(), Loc, B->getDeclName()); | ||||||
1206 | if (RefType.isNull()) | ||||||
1207 | return true; | ||||||
1208 | auto *RefVD = VarDecl::Create( | ||||||
1209 | S.Context, Src->getDeclContext(), Loc, Loc, | ||||||
1210 | B->getDeclName().getAsIdentifierInfo(), RefType, | ||||||
1211 | S.Context.getTrivialTypeSourceInfo(T, Loc), Src->getStorageClass()); | ||||||
1212 | RefVD->setLexicalDeclContext(Src->getLexicalDeclContext()); | ||||||
1213 | RefVD->setTSCSpec(Src->getTSCSpec()); | ||||||
1214 | RefVD->setImplicit(); | ||||||
1215 | if (Src->isInlineSpecified()) | ||||||
1216 | RefVD->setInlineSpecified(); | ||||||
1217 | RefVD->getLexicalDeclContext()->addHiddenDecl(RefVD); | ||||||
1218 | |||||||
1219 | InitializedEntity Entity = InitializedEntity::InitializeBinding(RefVD); | ||||||
1220 | InitializationKind Kind = InitializationKind::CreateCopy(Loc, Loc); | ||||||
1221 | InitializationSequence Seq(S, Entity, Kind, Init); | ||||||
1222 | E = Seq.Perform(S, Entity, Kind, Init); | ||||||
1223 | if (E.isInvalid()) | ||||||
1224 | return true; | ||||||
1225 | E = S.ActOnFinishFullExpr(E.get(), Loc, /*DiscardedValue*/ false); | ||||||
1226 | if (E.isInvalid()) | ||||||
1227 | return true; | ||||||
1228 | RefVD->setInit(E.get()); | ||||||
1229 | if (!E.get()->isValueDependent()) | ||||||
1230 | RefVD->checkInitIsICE(); | ||||||
1231 | |||||||
1232 | E = S.BuildDeclarationNameExpr(CXXScopeSpec(), | ||||||
1233 | DeclarationNameInfo(B->getDeclName(), Loc), | ||||||
1234 | RefVD); | ||||||
1235 | if (E.isInvalid()) | ||||||
1236 | return true; | ||||||
1237 | |||||||
1238 | B->setBinding(T, E.get()); | ||||||
1239 | I++; | ||||||
1240 | } | ||||||
1241 | |||||||
1242 | return false; | ||||||
1243 | } | ||||||
1244 | |||||||
1245 | /// Find the base class to decompose in a built-in decomposition of a class type. | ||||||
1246 | /// This base class search is, unfortunately, not quite like any other that we | ||||||
1247 | /// perform anywhere else in C++. | ||||||
1248 | static DeclAccessPair findDecomposableBaseClass(Sema &S, SourceLocation Loc, | ||||||
1249 | const CXXRecordDecl *RD, | ||||||
1250 | CXXCastPath &BasePath) { | ||||||
1251 | auto BaseHasFields = [](const CXXBaseSpecifier *Specifier, | ||||||
1252 | CXXBasePath &Path) { | ||||||
1253 | return Specifier->getType()->getAsCXXRecordDecl()->hasDirectFields(); | ||||||
1254 | }; | ||||||
1255 | |||||||
1256 | const CXXRecordDecl *ClassWithFields = nullptr; | ||||||
1257 | AccessSpecifier AS = AS_public; | ||||||
1258 | if (RD->hasDirectFields()) | ||||||
1259 | // [dcl.decomp]p4: | ||||||
1260 | // Otherwise, all of E's non-static data members shall be public direct | ||||||
1261 | // members of E ... | ||||||
1262 | ClassWithFields = RD; | ||||||
1263 | else { | ||||||
1264 | // ... or of ... | ||||||
1265 | CXXBasePaths Paths; | ||||||
1266 | Paths.setOrigin(const_cast<CXXRecordDecl*>(RD)); | ||||||
1267 | if (!RD->lookupInBases(BaseHasFields, Paths)) { | ||||||
1268 | // If no classes have fields, just decompose RD itself. (This will work | ||||||
1269 | // if and only if zero bindings were provided.) | ||||||
1270 | return DeclAccessPair::make(const_cast<CXXRecordDecl*>(RD), AS_public); | ||||||
1271 | } | ||||||
1272 | |||||||
1273 | CXXBasePath *BestPath = nullptr; | ||||||
1274 | for (auto &P : Paths) { | ||||||
1275 | if (!BestPath) | ||||||
1276 | BestPath = &P; | ||||||
1277 | else if (!S.Context.hasSameType(P.back().Base->getType(), | ||||||
1278 | BestPath->back().Base->getType())) { | ||||||
1279 | // ... the same ... | ||||||
1280 | S.Diag(Loc, diag::err_decomp_decl_multiple_bases_with_members) | ||||||
1281 | << false << RD << BestPath->back().Base->getType() | ||||||
1282 | << P.back().Base->getType(); | ||||||
1283 | return DeclAccessPair(); | ||||||
1284 | } else if (P.Access < BestPath->Access) { | ||||||
1285 | BestPath = &P; | ||||||
1286 | } | ||||||
1287 | } | ||||||
1288 | |||||||
1289 | // ... unambiguous ... | ||||||
1290 | QualType BaseType = BestPath->back().Base->getType(); | ||||||
1291 | if (Paths.isAmbiguous(S.Context.getCanonicalType(BaseType))) { | ||||||
1292 | S.Diag(Loc, diag::err_decomp_decl_ambiguous_base) | ||||||
1293 | << RD << BaseType << S.getAmbiguousPathsDisplayString(Paths); | ||||||
1294 | return DeclAccessPair(); | ||||||
1295 | } | ||||||
1296 | |||||||
1297 | // ... [accessible, implied by other rules] base class of E. | ||||||
1298 | S.CheckBaseClassAccess(Loc, BaseType, S.Context.getRecordType(RD), | ||||||
1299 | *BestPath, diag::err_decomp_decl_inaccessible_base); | ||||||
1300 | AS = BestPath->Access; | ||||||
1301 | |||||||
1302 | ClassWithFields = BaseType->getAsCXXRecordDecl(); | ||||||
1303 | S.BuildBasePathArray(Paths, BasePath); | ||||||
1304 | } | ||||||
1305 | |||||||
1306 | // The above search did not check whether the selected class itself has base | ||||||
1307 | // classes with fields, so check that now. | ||||||
1308 | CXXBasePaths Paths; | ||||||
1309 | if (ClassWithFields->lookupInBases(BaseHasFields, Paths)) { | ||||||
1310 | S.Diag(Loc, diag::err_decomp_decl_multiple_bases_with_members) | ||||||
1311 | << (ClassWithFields == RD) << RD << ClassWithFields | ||||||
1312 | << Paths.front().back().Base->getType(); | ||||||
1313 | return DeclAccessPair(); | ||||||
1314 | } | ||||||
1315 | |||||||
1316 | return DeclAccessPair::make(const_cast<CXXRecordDecl*>(ClassWithFields), AS); | ||||||
1317 | } | ||||||
1318 | |||||||
1319 | static bool checkMemberDecomposition(Sema &S, ArrayRef<BindingDecl*> Bindings, | ||||||
1320 | ValueDecl *Src, QualType DecompType, | ||||||
1321 | const CXXRecordDecl *OrigRD) { | ||||||
1322 | if (S.RequireCompleteType(Src->getLocation(), DecompType, | ||||||
1323 | diag::err_incomplete_type)) | ||||||
1324 | return true; | ||||||
1325 | |||||||
1326 | CXXCastPath BasePath; | ||||||
1327 | DeclAccessPair BasePair = | ||||||
1328 | findDecomposableBaseClass(S, Src->getLocation(), OrigRD, BasePath); | ||||||
1329 | const CXXRecordDecl *RD = cast_or_null<CXXRecordDecl>(BasePair.getDecl()); | ||||||
1330 | if (!RD) | ||||||
1331 | return true; | ||||||
1332 | QualType BaseType = S.Context.getQualifiedType(S.Context.getRecordType(RD), | ||||||
1333 | DecompType.getQualifiers()); | ||||||
1334 | |||||||
1335 | auto DiagnoseBadNumberOfBindings = [&]() -> bool { | ||||||
1336 | unsigned NumFields = | ||||||
1337 | std::count_if(RD->field_begin(), RD->field_end(), | ||||||
1338 | [](FieldDecl *FD) { return !FD->isUnnamedBitfield(); }); | ||||||
1339 | assert(Bindings.size() != NumFields)((Bindings.size() != NumFields) ? static_cast<void> (0) : __assert_fail ("Bindings.size() != NumFields", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 1339, __PRETTY_FUNCTION__)); | ||||||
1340 | S.Diag(Src->getLocation(), diag::err_decomp_decl_wrong_number_bindings) | ||||||
1341 | << DecompType << (unsigned)Bindings.size() << NumFields | ||||||
1342 | << (NumFields < Bindings.size()); | ||||||
1343 | return true; | ||||||
1344 | }; | ||||||
1345 | |||||||
1346 | // all of E's non-static data members shall be [...] well-formed | ||||||
1347 | // when named as e.name in the context of the structured binding, | ||||||
1348 | // E shall not have an anonymous union member, ... | ||||||
1349 | unsigned I = 0; | ||||||
1350 | for (auto *FD : RD->fields()) { | ||||||
1351 | if (FD->isUnnamedBitfield()) | ||||||
1352 | continue; | ||||||
1353 | |||||||
1354 | if (FD->isAnonymousStructOrUnion()) { | ||||||
1355 | S.Diag(Src->getLocation(), diag::err_decomp_decl_anon_union_member) | ||||||
1356 | << DecompType << FD->getType()->isUnionType(); | ||||||
1357 | S.Diag(FD->getLocation(), diag::note_declared_at); | ||||||
1358 | return true; | ||||||
1359 | } | ||||||
1360 | |||||||
1361 | // We have a real field to bind. | ||||||
1362 | if (I >= Bindings.size()) | ||||||
1363 | return DiagnoseBadNumberOfBindings(); | ||||||
1364 | auto *B = Bindings[I++]; | ||||||
1365 | SourceLocation Loc = B->getLocation(); | ||||||
1366 | |||||||
1367 | // The field must be accessible in the context of the structured binding. | ||||||
1368 | // We already checked that the base class is accessible. | ||||||
1369 | // FIXME: Add 'const' to AccessedEntity's classes so we can remove the | ||||||
1370 | // const_cast here. | ||||||
1371 | S.CheckStructuredBindingMemberAccess( | ||||||
1372 | Loc, const_cast<CXXRecordDecl *>(OrigRD), | ||||||
1373 | DeclAccessPair::make(FD, CXXRecordDecl::MergeAccess( | ||||||
1374 | BasePair.getAccess(), FD->getAccess()))); | ||||||
1375 | |||||||
1376 | // Initialize the binding to Src.FD. | ||||||
1377 | ExprResult E = S.BuildDeclRefExpr(Src, DecompType, VK_LValue, Loc); | ||||||
1378 | if (E.isInvalid()) | ||||||
1379 | return true; | ||||||
1380 | E = S.ImpCastExprToType(E.get(), BaseType, CK_UncheckedDerivedToBase, | ||||||
1381 | VK_LValue, &BasePath); | ||||||
1382 | if (E.isInvalid()) | ||||||
1383 | return true; | ||||||
1384 | E = S.BuildFieldReferenceExpr(E.get(), /*IsArrow*/ false, Loc, | ||||||
1385 | CXXScopeSpec(), FD, | ||||||
1386 | DeclAccessPair::make(FD, FD->getAccess()), | ||||||
1387 | DeclarationNameInfo(FD->getDeclName(), Loc)); | ||||||
1388 | if (E.isInvalid()) | ||||||
1389 | return true; | ||||||
1390 | |||||||
1391 | // If the type of the member is T, the referenced type is cv T, where cv is | ||||||
1392 | // the cv-qualification of the decomposition expression. | ||||||
1393 | // | ||||||
1394 | // FIXME: We resolve a defect here: if the field is mutable, we do not add | ||||||
1395 | // 'const' to the type of the field. | ||||||
1396 | Qualifiers Q = DecompType.getQualifiers(); | ||||||
1397 | if (FD->isMutable()) | ||||||
1398 | Q.removeConst(); | ||||||
1399 | B->setBinding(S.BuildQualifiedType(FD->getType(), Loc, Q), E.get()); | ||||||
1400 | } | ||||||
1401 | |||||||
1402 | if (I != Bindings.size()) | ||||||
1403 | return DiagnoseBadNumberOfBindings(); | ||||||
1404 | |||||||
1405 | return false; | ||||||
1406 | } | ||||||
1407 | |||||||
1408 | void Sema::CheckCompleteDecompositionDeclaration(DecompositionDecl *DD) { | ||||||
1409 | QualType DecompType = DD->getType(); | ||||||
1410 | |||||||
1411 | // If the type of the decomposition is dependent, then so is the type of | ||||||
1412 | // each binding. | ||||||
1413 | if (DecompType->isDependentType()) { | ||||||
1414 | for (auto *B : DD->bindings()) | ||||||
1415 | B->setType(Context.DependentTy); | ||||||
1416 | return; | ||||||
1417 | } | ||||||
1418 | |||||||
1419 | DecompType = DecompType.getNonReferenceType(); | ||||||
1420 | ArrayRef<BindingDecl*> Bindings = DD->bindings(); | ||||||
1421 | |||||||
1422 | // C++1z [dcl.decomp]/2: | ||||||
1423 | // If E is an array type [...] | ||||||
1424 | // As an extension, we also support decomposition of built-in complex and | ||||||
1425 | // vector types. | ||||||
1426 | if (auto *CAT = Context.getAsConstantArrayType(DecompType)) { | ||||||
1427 | if (checkArrayDecomposition(*this, Bindings, DD, DecompType, CAT)) | ||||||
1428 | DD->setInvalidDecl(); | ||||||
1429 | return; | ||||||
1430 | } | ||||||
1431 | if (auto *VT = DecompType->getAs<VectorType>()) { | ||||||
1432 | if (checkVectorDecomposition(*this, Bindings, DD, DecompType, VT)) | ||||||
1433 | DD->setInvalidDecl(); | ||||||
1434 | return; | ||||||
1435 | } | ||||||
1436 | if (auto *CT = DecompType->getAs<ComplexType>()) { | ||||||
1437 | if (checkComplexDecomposition(*this, Bindings, DD, DecompType, CT)) | ||||||
1438 | DD->setInvalidDecl(); | ||||||
1439 | return; | ||||||
1440 | } | ||||||
1441 | |||||||
1442 | // C++1z [dcl.decomp]/3: | ||||||
1443 | // if the expression std::tuple_size<E>::value is a well-formed integral | ||||||
1444 | // constant expression, [...] | ||||||
1445 | llvm::APSInt TupleSize(32); | ||||||
1446 | switch (isTupleLike(*this, DD->getLocation(), DecompType, TupleSize)) { | ||||||
1447 | case IsTupleLike::Error: | ||||||
1448 | DD->setInvalidDecl(); | ||||||
1449 | return; | ||||||
1450 | |||||||
1451 | case IsTupleLike::TupleLike: | ||||||
1452 | if (checkTupleLikeDecomposition(*this, Bindings, DD, DecompType, TupleSize)) | ||||||
1453 | DD->setInvalidDecl(); | ||||||
1454 | return; | ||||||
1455 | |||||||
1456 | case IsTupleLike::NotTupleLike: | ||||||
1457 | break; | ||||||
1458 | } | ||||||
1459 | |||||||
1460 | // C++1z [dcl.dcl]/8: | ||||||
1461 | // [E shall be of array or non-union class type] | ||||||
1462 | CXXRecordDecl *RD = DecompType->getAsCXXRecordDecl(); | ||||||
1463 | if (!RD || RD->isUnion()) { | ||||||
1464 | Diag(DD->getLocation(), diag::err_decomp_decl_unbindable_type) | ||||||
1465 | << DD << !RD << DecompType; | ||||||
1466 | DD->setInvalidDecl(); | ||||||
1467 | return; | ||||||
1468 | } | ||||||
1469 | |||||||
1470 | // C++1z [dcl.decomp]/4: | ||||||
1471 | // all of E's non-static data members shall be [...] direct members of | ||||||
1472 | // E or of the same unambiguous public base class of E, ... | ||||||
1473 | if (checkMemberDecomposition(*this, Bindings, DD, DecompType, RD)) | ||||||
1474 | DD->setInvalidDecl(); | ||||||
1475 | } | ||||||
1476 | |||||||
1477 | /// Merge the exception specifications of two variable declarations. | ||||||
1478 | /// | ||||||
1479 | /// This is called when there's a redeclaration of a VarDecl. The function | ||||||
1480 | /// checks if the redeclaration might have an exception specification and | ||||||
1481 | /// validates compatibility and merges the specs if necessary. | ||||||
1482 | void Sema::MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old) { | ||||||
1483 | // Shortcut if exceptions are disabled. | ||||||
1484 | if (!getLangOpts().CXXExceptions) | ||||||
1485 | return; | ||||||
1486 | |||||||
1487 | assert(Context.hasSameType(New->getType(), Old->getType()) &&((Context.hasSameType(New->getType(), Old->getType()) && "Should only be called if types are otherwise the same.") ? static_cast <void> (0) : __assert_fail ("Context.hasSameType(New->getType(), Old->getType()) && \"Should only be called if types are otherwise the same.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 1488, __PRETTY_FUNCTION__)) | ||||||
1488 | "Should only be called if types are otherwise the same.")((Context.hasSameType(New->getType(), Old->getType()) && "Should only be called if types are otherwise the same.") ? static_cast <void> (0) : __assert_fail ("Context.hasSameType(New->getType(), Old->getType()) && \"Should only be called if types are otherwise the same.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 1488, __PRETTY_FUNCTION__)); | ||||||
1489 | |||||||
1490 | QualType NewType = New->getType(); | ||||||
1491 | QualType OldType = Old->getType(); | ||||||
1492 | |||||||
1493 | // We're only interested in pointers and references to functions, as well | ||||||
1494 | // as pointers to member functions. | ||||||
1495 | if (const ReferenceType *R = NewType->getAs<ReferenceType>()) { | ||||||
1496 | NewType = R->getPointeeType(); | ||||||
1497 | OldType = OldType->getAs<ReferenceType>()->getPointeeType(); | ||||||
1498 | } else if (const PointerType *P = NewType->getAs<PointerType>()) { | ||||||
1499 | NewType = P->getPointeeType(); | ||||||
1500 | OldType = OldType->getAs<PointerType>()->getPointeeType(); | ||||||
1501 | } else if (const MemberPointerType *M = NewType->getAs<MemberPointerType>()) { | ||||||
1502 | NewType = M->getPointeeType(); | ||||||
1503 | OldType = OldType->getAs<MemberPointerType>()->getPointeeType(); | ||||||
1504 | } | ||||||
1505 | |||||||
1506 | if (!NewType->isFunctionProtoType()) | ||||||
1507 | return; | ||||||
1508 | |||||||
1509 | // There's lots of special cases for functions. For function pointers, system | ||||||
1510 | // libraries are hopefully not as broken so that we don't need these | ||||||
1511 | // workarounds. | ||||||
1512 | if (CheckEquivalentExceptionSpec( | ||||||
1513 | OldType->getAs<FunctionProtoType>(), Old->getLocation(), | ||||||
1514 | NewType->getAs<FunctionProtoType>(), New->getLocation())) { | ||||||
1515 | New->setInvalidDecl(); | ||||||
1516 | } | ||||||
1517 | } | ||||||
1518 | |||||||
1519 | /// CheckCXXDefaultArguments - Verify that the default arguments for a | ||||||
1520 | /// function declaration are well-formed according to C++ | ||||||
1521 | /// [dcl.fct.default]. | ||||||
1522 | void Sema::CheckCXXDefaultArguments(FunctionDecl *FD) { | ||||||
1523 | unsigned NumParams = FD->getNumParams(); | ||||||
1524 | unsigned p; | ||||||
1525 | |||||||
1526 | // Find first parameter with a default argument | ||||||
1527 | for (p = 0; p < NumParams; ++p) { | ||||||
1528 | ParmVarDecl *Param = FD->getParamDecl(p); | ||||||
1529 | if (Param->hasDefaultArg()) | ||||||
1530 | break; | ||||||
1531 | } | ||||||
1532 | |||||||
1533 | // C++11 [dcl.fct.default]p4: | ||||||
1534 | // In a given function declaration, each parameter subsequent to a parameter | ||||||
1535 | // with a default argument shall have a default argument supplied in this or | ||||||
1536 | // a previous declaration or shall be a function parameter pack. A default | ||||||
1537 | // argument shall not be redefined by a later declaration (not even to the | ||||||
1538 | // same value). | ||||||
1539 | unsigned LastMissingDefaultArg = 0; | ||||||
1540 | for (; p < NumParams; ++p) { | ||||||
1541 | ParmVarDecl *Param = FD->getParamDecl(p); | ||||||
1542 | if (!Param->hasDefaultArg() && !Param->isParameterPack()) { | ||||||
1543 | if (Param->isInvalidDecl()) | ||||||
1544 | /* We already complained about this parameter. */; | ||||||
1545 | else if (Param->getIdentifier()) | ||||||
1546 | Diag(Param->getLocation(), | ||||||
1547 | diag::err_param_default_argument_missing_name) | ||||||
1548 | << Param->getIdentifier(); | ||||||
1549 | else | ||||||
1550 | Diag(Param->getLocation(), | ||||||
1551 | diag::err_param_default_argument_missing); | ||||||
1552 | |||||||
1553 | LastMissingDefaultArg = p; | ||||||
1554 | } | ||||||
1555 | } | ||||||
1556 | |||||||
1557 | if (LastMissingDefaultArg > 0) { | ||||||
1558 | // Some default arguments were missing. Clear out all of the | ||||||
1559 | // default arguments up to (and including) the last missing | ||||||
1560 | // default argument, so that we leave the function parameters | ||||||
1561 | // in a semantically valid state. | ||||||
1562 | for (p = 0; p <= LastMissingDefaultArg; ++p) { | ||||||
1563 | ParmVarDecl *Param = FD->getParamDecl(p); | ||||||
1564 | if (Param->hasDefaultArg()) { | ||||||
1565 | Param->setDefaultArg(nullptr); | ||||||
1566 | } | ||||||
1567 | } | ||||||
1568 | } | ||||||
1569 | } | ||||||
1570 | |||||||
1571 | /// Check that the given type is a literal type. Issue a diagnostic if not, | ||||||
1572 | /// if Kind is Diagnose. | ||||||
1573 | /// \return \c true if a problem has been found (and optionally diagnosed). | ||||||
1574 | template <typename... Ts> | ||||||
1575 | static bool CheckLiteralType(Sema &SemaRef, Sema::CheckConstexprKind Kind, | ||||||
1576 | SourceLocation Loc, QualType T, unsigned DiagID, | ||||||
1577 | Ts &&...DiagArgs) { | ||||||
1578 | if (T->isDependentType()) | ||||||
1579 | return false; | ||||||
1580 | |||||||
1581 | switch (Kind) { | ||||||
1582 | case Sema::CheckConstexprKind::Diagnose: | ||||||
1583 | return SemaRef.RequireLiteralType(Loc, T, DiagID, | ||||||
1584 | std::forward<Ts>(DiagArgs)...); | ||||||
1585 | |||||||
1586 | case Sema::CheckConstexprKind::CheckValid: | ||||||
1587 | return !T->isLiteralType(SemaRef.Context); | ||||||
1588 | } | ||||||
1589 | |||||||
1590 | llvm_unreachable("unknown CheckConstexprKind")::llvm::llvm_unreachable_internal("unknown CheckConstexprKind" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 1590); | ||||||
1591 | } | ||||||
1592 | |||||||
1593 | /// Determine whether a destructor cannot be constexpr due to | ||||||
1594 | static bool CheckConstexprDestructorSubobjects(Sema &SemaRef, | ||||||
1595 | const CXXDestructorDecl *DD, | ||||||
1596 | Sema::CheckConstexprKind Kind) { | ||||||
1597 | auto Check = [&](SourceLocation Loc, QualType T, const FieldDecl *FD) { | ||||||
1598 | const CXXRecordDecl *RD = | ||||||
1599 | T->getBaseElementTypeUnsafe()->getAsCXXRecordDecl(); | ||||||
1600 | if (!RD || RD->hasConstexprDestructor()) | ||||||
1601 | return true; | ||||||
1602 | |||||||
1603 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
1604 | SemaRef.Diag(DD->getLocation(), diag::err_constexpr_dtor_subobject) | ||||||
1605 | << DD->getConstexprKind() << !FD | ||||||
1606 | << (FD ? FD->getDeclName() : DeclarationName()) << T; | ||||||
1607 | SemaRef.Diag(Loc, diag::note_constexpr_dtor_subobject) | ||||||
1608 | << !FD << (FD ? FD->getDeclName() : DeclarationName()) << T; | ||||||
1609 | } | ||||||
1610 | return false; | ||||||
1611 | }; | ||||||
1612 | |||||||
1613 | const CXXRecordDecl *RD = DD->getParent(); | ||||||
1614 | for (const CXXBaseSpecifier &B : RD->bases()) | ||||||
1615 | if (!Check(B.getBaseTypeLoc(), B.getType(), nullptr)) | ||||||
1616 | return false; | ||||||
1617 | for (const FieldDecl *FD : RD->fields()) | ||||||
1618 | if (!Check(FD->getLocation(), FD->getType(), FD)) | ||||||
1619 | return false; | ||||||
1620 | return true; | ||||||
1621 | } | ||||||
1622 | |||||||
1623 | // CheckConstexprParameterTypes - Check whether a function's parameter types | ||||||
1624 | // are all literal types. If so, return true. If not, produce a suitable | ||||||
1625 | // diagnostic and return false. | ||||||
1626 | static bool CheckConstexprParameterTypes(Sema &SemaRef, | ||||||
1627 | const FunctionDecl *FD, | ||||||
1628 | Sema::CheckConstexprKind Kind) { | ||||||
1629 | unsigned ArgIndex = 0; | ||||||
1630 | const FunctionProtoType *FT = FD->getType()->getAs<FunctionProtoType>(); | ||||||
1631 | for (FunctionProtoType::param_type_iterator i = FT->param_type_begin(), | ||||||
1632 | e = FT->param_type_end(); | ||||||
1633 | i != e; ++i, ++ArgIndex) { | ||||||
1634 | const ParmVarDecl *PD = FD->getParamDecl(ArgIndex); | ||||||
1635 | SourceLocation ParamLoc = PD->getLocation(); | ||||||
1636 | if (CheckLiteralType(SemaRef, Kind, ParamLoc, *i, | ||||||
1637 | diag::err_constexpr_non_literal_param, ArgIndex + 1, | ||||||
1638 | PD->getSourceRange(), isa<CXXConstructorDecl>(FD), | ||||||
1639 | FD->isConsteval())) | ||||||
1640 | return false; | ||||||
1641 | } | ||||||
1642 | return true; | ||||||
1643 | } | ||||||
1644 | |||||||
1645 | /// Get diagnostic %select index for tag kind for | ||||||
1646 | /// record diagnostic message. | ||||||
1647 | /// WARNING: Indexes apply to particular diagnostics only! | ||||||
1648 | /// | ||||||
1649 | /// \returns diagnostic %select index. | ||||||
1650 | static unsigned getRecordDiagFromTagKind(TagTypeKind Tag) { | ||||||
1651 | switch (Tag) { | ||||||
1652 | case TTK_Struct: return 0; | ||||||
1653 | case TTK_Interface: return 1; | ||||||
1654 | case TTK_Class: return 2; | ||||||
1655 | default: llvm_unreachable("Invalid tag kind for record diagnostic!")::llvm::llvm_unreachable_internal("Invalid tag kind for record diagnostic!" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 1655); | ||||||
1656 | } | ||||||
1657 | } | ||||||
1658 | |||||||
1659 | static bool CheckConstexprFunctionBody(Sema &SemaRef, const FunctionDecl *Dcl, | ||||||
1660 | Stmt *Body, | ||||||
1661 | Sema::CheckConstexprKind Kind); | ||||||
1662 | |||||||
1663 | // Check whether a function declaration satisfies the requirements of a | ||||||
1664 | // constexpr function definition or a constexpr constructor definition. If so, | ||||||
1665 | // return true. If not, produce appropriate diagnostics (unless asked not to by | ||||||
1666 | // Kind) and return false. | ||||||
1667 | // | ||||||
1668 | // This implements C++11 [dcl.constexpr]p3,4, as amended by DR1360. | ||||||
1669 | bool Sema::CheckConstexprFunctionDefinition(const FunctionDecl *NewFD, | ||||||
1670 | CheckConstexprKind Kind) { | ||||||
1671 | const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD); | ||||||
1672 | if (MD && MD->isInstance()) { | ||||||
1673 | // C++11 [dcl.constexpr]p4: | ||||||
1674 | // The definition of a constexpr constructor shall satisfy the following | ||||||
1675 | // constraints: | ||||||
1676 | // - the class shall not have any virtual base classes; | ||||||
1677 | // | ||||||
1678 | // FIXME: This only applies to constructors and destructors, not arbitrary | ||||||
1679 | // member functions. | ||||||
1680 | const CXXRecordDecl *RD = MD->getParent(); | ||||||
1681 | if (RD->getNumVBases()) { | ||||||
1682 | if (Kind == CheckConstexprKind::CheckValid) | ||||||
1683 | return false; | ||||||
1684 | |||||||
1685 | Diag(NewFD->getLocation(), diag::err_constexpr_virtual_base) | ||||||
1686 | << isa<CXXConstructorDecl>(NewFD) | ||||||
1687 | << getRecordDiagFromTagKind(RD->getTagKind()) << RD->getNumVBases(); | ||||||
1688 | for (const auto &I : RD->vbases()) | ||||||
1689 | Diag(I.getBeginLoc(), diag::note_constexpr_virtual_base_here) | ||||||
1690 | << I.getSourceRange(); | ||||||
1691 | return false; | ||||||
1692 | } | ||||||
1693 | } | ||||||
1694 | |||||||
1695 | if (!isa<CXXConstructorDecl>(NewFD)) { | ||||||
1696 | // C++11 [dcl.constexpr]p3: | ||||||
1697 | // The definition of a constexpr function shall satisfy the following | ||||||
1698 | // constraints: | ||||||
1699 | // - it shall not be virtual; (removed in C++20) | ||||||
1700 | const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD); | ||||||
1701 | if (Method && Method->isVirtual()) { | ||||||
1702 | if (getLangOpts().CPlusPlus2a) { | ||||||
1703 | if (Kind == CheckConstexprKind::Diagnose) | ||||||
1704 | Diag(Method->getLocation(), diag::warn_cxx17_compat_constexpr_virtual); | ||||||
1705 | } else { | ||||||
1706 | if (Kind == CheckConstexprKind::CheckValid) | ||||||
1707 | return false; | ||||||
1708 | |||||||
1709 | Method = Method->getCanonicalDecl(); | ||||||
1710 | Diag(Method->getLocation(), diag::err_constexpr_virtual); | ||||||
1711 | |||||||
1712 | // If it's not obvious why this function is virtual, find an overridden | ||||||
1713 | // function which uses the 'virtual' keyword. | ||||||
1714 | const CXXMethodDecl *WrittenVirtual = Method; | ||||||
1715 | while (!WrittenVirtual->isVirtualAsWritten()) | ||||||
1716 | WrittenVirtual = *WrittenVirtual->begin_overridden_methods(); | ||||||
1717 | if (WrittenVirtual != Method) | ||||||
1718 | Diag(WrittenVirtual->getLocation(), | ||||||
1719 | diag::note_overridden_virtual_function); | ||||||
1720 | return false; | ||||||
1721 | } | ||||||
1722 | } | ||||||
1723 | |||||||
1724 | // - its return type shall be a literal type; | ||||||
1725 | QualType RT = NewFD->getReturnType(); | ||||||
1726 | if (CheckLiteralType(*this, Kind, NewFD->getLocation(), RT, | ||||||
1727 | diag::err_constexpr_non_literal_return, | ||||||
1728 | NewFD->isConsteval())) | ||||||
1729 | return false; | ||||||
1730 | } | ||||||
1731 | |||||||
1732 | if (auto *Dtor = dyn_cast<CXXDestructorDecl>(NewFD)) { | ||||||
1733 | // A destructor can be constexpr only if the defaulted destructor could be; | ||||||
1734 | // we don't need to check the members and bases if we already know they all | ||||||
1735 | // have constexpr destructors. | ||||||
1736 | if (!Dtor->getParent()->defaultedDestructorIsConstexpr()) { | ||||||
1737 | if (Kind == CheckConstexprKind::CheckValid) | ||||||
1738 | return false; | ||||||
1739 | if (!CheckConstexprDestructorSubobjects(*this, Dtor, Kind)) | ||||||
1740 | return false; | ||||||
1741 | } | ||||||
1742 | } | ||||||
1743 | |||||||
1744 | // - each of its parameter types shall be a literal type; | ||||||
1745 | if (!CheckConstexprParameterTypes(*this, NewFD, Kind)) | ||||||
1746 | return false; | ||||||
1747 | |||||||
1748 | Stmt *Body = NewFD->getBody(); | ||||||
1749 | assert(Body &&((Body && "CheckConstexprFunctionDefinition called on function with no body" ) ? static_cast<void> (0) : __assert_fail ("Body && \"CheckConstexprFunctionDefinition called on function with no body\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 1750, __PRETTY_FUNCTION__)) | ||||||
1750 | "CheckConstexprFunctionDefinition called on function with no body")((Body && "CheckConstexprFunctionDefinition called on function with no body" ) ? static_cast<void> (0) : __assert_fail ("Body && \"CheckConstexprFunctionDefinition called on function with no body\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 1750, __PRETTY_FUNCTION__)); | ||||||
1751 | return CheckConstexprFunctionBody(*this, NewFD, Body, Kind); | ||||||
1752 | } | ||||||
1753 | |||||||
1754 | /// Check the given declaration statement is legal within a constexpr function | ||||||
1755 | /// body. C++11 [dcl.constexpr]p3,p4, and C++1y [dcl.constexpr]p3. | ||||||
1756 | /// | ||||||
1757 | /// \return true if the body is OK (maybe only as an extension), false if we | ||||||
1758 | /// have diagnosed a problem. | ||||||
1759 | static bool CheckConstexprDeclStmt(Sema &SemaRef, const FunctionDecl *Dcl, | ||||||
1760 | DeclStmt *DS, SourceLocation &Cxx1yLoc, | ||||||
1761 | Sema::CheckConstexprKind Kind) { | ||||||
1762 | // C++11 [dcl.constexpr]p3 and p4: | ||||||
1763 | // The definition of a constexpr function(p3) or constructor(p4) [...] shall | ||||||
1764 | // contain only | ||||||
1765 | for (const auto *DclIt : DS->decls()) { | ||||||
1766 | switch (DclIt->getKind()) { | ||||||
1767 | case Decl::StaticAssert: | ||||||
1768 | case Decl::Using: | ||||||
1769 | case Decl::UsingShadow: | ||||||
1770 | case Decl::UsingDirective: | ||||||
1771 | case Decl::UnresolvedUsingTypename: | ||||||
1772 | case Decl::UnresolvedUsingValue: | ||||||
1773 | // - static_assert-declarations | ||||||
1774 | // - using-declarations, | ||||||
1775 | // - using-directives, | ||||||
1776 | continue; | ||||||
1777 | |||||||
1778 | case Decl::Typedef: | ||||||
1779 | case Decl::TypeAlias: { | ||||||
1780 | // - typedef declarations and alias-declarations that do not define | ||||||
1781 | // classes or enumerations, | ||||||
1782 | const auto *TN = cast<TypedefNameDecl>(DclIt); | ||||||
1783 | if (TN->getUnderlyingType()->isVariablyModifiedType()) { | ||||||
1784 | // Don't allow variably-modified types in constexpr functions. | ||||||
1785 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
1786 | TypeLoc TL = TN->getTypeSourceInfo()->getTypeLoc(); | ||||||
1787 | SemaRef.Diag(TL.getBeginLoc(), diag::err_constexpr_vla) | ||||||
1788 | << TL.getSourceRange() << TL.getType() | ||||||
1789 | << isa<CXXConstructorDecl>(Dcl); | ||||||
1790 | } | ||||||
1791 | return false; | ||||||
1792 | } | ||||||
1793 | continue; | ||||||
1794 | } | ||||||
1795 | |||||||
1796 | case Decl::Enum: | ||||||
1797 | case Decl::CXXRecord: | ||||||
1798 | // C++1y allows types to be defined, not just declared. | ||||||
1799 | if (cast<TagDecl>(DclIt)->isThisDeclarationADefinition()) { | ||||||
1800 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
1801 | SemaRef.Diag(DS->getBeginLoc(), | ||||||
1802 | SemaRef.getLangOpts().CPlusPlus14 | ||||||
1803 | ? diag::warn_cxx11_compat_constexpr_type_definition | ||||||
1804 | : diag::ext_constexpr_type_definition) | ||||||
1805 | << isa<CXXConstructorDecl>(Dcl); | ||||||
1806 | } else if (!SemaRef.getLangOpts().CPlusPlus14) { | ||||||
1807 | return false; | ||||||
1808 | } | ||||||
1809 | } | ||||||
1810 | continue; | ||||||
1811 | |||||||
1812 | case Decl::EnumConstant: | ||||||
1813 | case Decl::IndirectField: | ||||||
1814 | case Decl::ParmVar: | ||||||
1815 | // These can only appear with other declarations which are banned in | ||||||
1816 | // C++11 and permitted in C++1y, so ignore them. | ||||||
1817 | continue; | ||||||
1818 | |||||||
1819 | case Decl::Var: | ||||||
1820 | case Decl::Decomposition: { | ||||||
1821 | // C++1y [dcl.constexpr]p3 allows anything except: | ||||||
1822 | // a definition of a variable of non-literal type or of static or | ||||||
1823 | // thread storage duration or [before C++2a] for which no | ||||||
1824 | // initialization is performed. | ||||||
1825 | const auto *VD = cast<VarDecl>(DclIt); | ||||||
1826 | if (VD->isThisDeclarationADefinition()) { | ||||||
1827 | if (VD->isStaticLocal()) { | ||||||
1828 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
1829 | SemaRef.Diag(VD->getLocation(), | ||||||
1830 | diag::err_constexpr_local_var_static) | ||||||
1831 | << isa<CXXConstructorDecl>(Dcl) | ||||||
1832 | << (VD->getTLSKind() == VarDecl::TLS_Dynamic); | ||||||
1833 | } | ||||||
1834 | return false; | ||||||
1835 | } | ||||||
1836 | if (CheckLiteralType(SemaRef, Kind, VD->getLocation(), VD->getType(), | ||||||
1837 | diag::err_constexpr_local_var_non_literal_type, | ||||||
1838 | isa<CXXConstructorDecl>(Dcl))) | ||||||
1839 | return false; | ||||||
1840 | if (!VD->getType()->isDependentType() && | ||||||
1841 | !VD->hasInit() && !VD->isCXXForRangeDecl()) { | ||||||
1842 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
1843 | SemaRef.Diag( | ||||||
1844 | VD->getLocation(), | ||||||
1845 | SemaRef.getLangOpts().CPlusPlus2a | ||||||
1846 | ? diag::warn_cxx17_compat_constexpr_local_var_no_init | ||||||
1847 | : diag::ext_constexpr_local_var_no_init) | ||||||
1848 | << isa<CXXConstructorDecl>(Dcl); | ||||||
1849 | } else if (!SemaRef.getLangOpts().CPlusPlus2a) { | ||||||
1850 | return false; | ||||||
1851 | } | ||||||
1852 | continue; | ||||||
1853 | } | ||||||
1854 | } | ||||||
1855 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
1856 | SemaRef.Diag(VD->getLocation(), | ||||||
1857 | SemaRef.getLangOpts().CPlusPlus14 | ||||||
1858 | ? diag::warn_cxx11_compat_constexpr_local_var | ||||||
1859 | : diag::ext_constexpr_local_var) | ||||||
1860 | << isa<CXXConstructorDecl>(Dcl); | ||||||
1861 | } else if (!SemaRef.getLangOpts().CPlusPlus14) { | ||||||
1862 | return false; | ||||||
1863 | } | ||||||
1864 | continue; | ||||||
1865 | } | ||||||
1866 | |||||||
1867 | case Decl::NamespaceAlias: | ||||||
1868 | case Decl::Function: | ||||||
1869 | // These are disallowed in C++11 and permitted in C++1y. Allow them | ||||||
1870 | // everywhere as an extension. | ||||||
1871 | if (!Cxx1yLoc.isValid()) | ||||||
1872 | Cxx1yLoc = DS->getBeginLoc(); | ||||||
1873 | continue; | ||||||
1874 | |||||||
1875 | default: | ||||||
1876 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
1877 | SemaRef.Diag(DS->getBeginLoc(), diag::err_constexpr_body_invalid_stmt) | ||||||
1878 | << isa<CXXConstructorDecl>(Dcl) << Dcl->isConsteval(); | ||||||
1879 | } | ||||||
1880 | return false; | ||||||
1881 | } | ||||||
1882 | } | ||||||
1883 | |||||||
1884 | return true; | ||||||
1885 | } | ||||||
1886 | |||||||
1887 | /// Check that the given field is initialized within a constexpr constructor. | ||||||
1888 | /// | ||||||
1889 | /// \param Dcl The constexpr constructor being checked. | ||||||
1890 | /// \param Field The field being checked. This may be a member of an anonymous | ||||||
1891 | /// struct or union nested within the class being checked. | ||||||
1892 | /// \param Inits All declarations, including anonymous struct/union members and | ||||||
1893 | /// indirect members, for which any initialization was provided. | ||||||
1894 | /// \param Diagnosed Whether we've emitted the error message yet. Used to attach | ||||||
1895 | /// multiple notes for different members to the same error. | ||||||
1896 | /// \param Kind Whether we're diagnosing a constructor as written or determining | ||||||
1897 | /// whether the formal requirements are satisfied. | ||||||
1898 | /// \return \c false if we're checking for validity and the constructor does | ||||||
1899 | /// not satisfy the requirements on a constexpr constructor. | ||||||
1900 | static bool CheckConstexprCtorInitializer(Sema &SemaRef, | ||||||
1901 | const FunctionDecl *Dcl, | ||||||
1902 | FieldDecl *Field, | ||||||
1903 | llvm::SmallSet<Decl*, 16> &Inits, | ||||||
1904 | bool &Diagnosed, | ||||||
1905 | Sema::CheckConstexprKind Kind) { | ||||||
1906 | // In C++20 onwards, there's nothing to check for validity. | ||||||
1907 | if (Kind == Sema::CheckConstexprKind::CheckValid && | ||||||
1908 | SemaRef.getLangOpts().CPlusPlus2a) | ||||||
1909 | return true; | ||||||
1910 | |||||||
1911 | if (Field->isInvalidDecl()) | ||||||
1912 | return true; | ||||||
1913 | |||||||
1914 | if (Field->isUnnamedBitfield()) | ||||||
1915 | return true; | ||||||
1916 | |||||||
1917 | // Anonymous unions with no variant members and empty anonymous structs do not | ||||||
1918 | // need to be explicitly initialized. FIXME: Anonymous structs that contain no | ||||||
1919 | // indirect fields don't need initializing. | ||||||
1920 | if (Field->isAnonymousStructOrUnion() && | ||||||
1921 | (Field->getType()->isUnionType() | ||||||
1922 | ? !Field->getType()->getAsCXXRecordDecl()->hasVariantMembers() | ||||||
1923 | : Field->getType()->getAsCXXRecordDecl()->isEmpty())) | ||||||
1924 | return true; | ||||||
1925 | |||||||
1926 | if (!Inits.count(Field)) { | ||||||
1927 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
1928 | if (!Diagnosed) { | ||||||
1929 | SemaRef.Diag(Dcl->getLocation(), | ||||||
1930 | SemaRef.getLangOpts().CPlusPlus2a | ||||||
1931 | ? diag::warn_cxx17_compat_constexpr_ctor_missing_init | ||||||
1932 | : diag::ext_constexpr_ctor_missing_init); | ||||||
1933 | Diagnosed = true; | ||||||
1934 | } | ||||||
1935 | SemaRef.Diag(Field->getLocation(), | ||||||
1936 | diag::note_constexpr_ctor_missing_init); | ||||||
1937 | } else if (!SemaRef.getLangOpts().CPlusPlus2a) { | ||||||
1938 | return false; | ||||||
1939 | } | ||||||
1940 | } else if (Field->isAnonymousStructOrUnion()) { | ||||||
1941 | const RecordDecl *RD = Field->getType()->castAs<RecordType>()->getDecl(); | ||||||
1942 | for (auto *I : RD->fields()) | ||||||
1943 | // If an anonymous union contains an anonymous struct of which any member | ||||||
1944 | // is initialized, all members must be initialized. | ||||||
1945 | if (!RD->isUnion() || Inits.count(I)) | ||||||
1946 | if (!CheckConstexprCtorInitializer(SemaRef, Dcl, I, Inits, Diagnosed, | ||||||
1947 | Kind)) | ||||||
1948 | return false; | ||||||
1949 | } | ||||||
1950 | return true; | ||||||
1951 | } | ||||||
1952 | |||||||
1953 | /// Check the provided statement is allowed in a constexpr function | ||||||
1954 | /// definition. | ||||||
1955 | static bool | ||||||
1956 | CheckConstexprFunctionStmt(Sema &SemaRef, const FunctionDecl *Dcl, Stmt *S, | ||||||
1957 | SmallVectorImpl<SourceLocation> &ReturnStmts, | ||||||
1958 | SourceLocation &Cxx1yLoc, SourceLocation &Cxx2aLoc, | ||||||
1959 | Sema::CheckConstexprKind Kind) { | ||||||
1960 | // - its function-body shall be [...] a compound-statement that contains only | ||||||
1961 | switch (S->getStmtClass()) { | ||||||
1962 | case Stmt::NullStmtClass: | ||||||
1963 | // - null statements, | ||||||
1964 | return true; | ||||||
1965 | |||||||
1966 | case Stmt::DeclStmtClass: | ||||||
1967 | // - static_assert-declarations | ||||||
1968 | // - using-declarations, | ||||||
1969 | // - using-directives, | ||||||
1970 | // - typedef declarations and alias-declarations that do not define | ||||||
1971 | // classes or enumerations, | ||||||
1972 | if (!CheckConstexprDeclStmt(SemaRef, Dcl, cast<DeclStmt>(S), Cxx1yLoc, Kind)) | ||||||
1973 | return false; | ||||||
1974 | return true; | ||||||
1975 | |||||||
1976 | case Stmt::ReturnStmtClass: | ||||||
1977 | // - and exactly one return statement; | ||||||
1978 | if (isa<CXXConstructorDecl>(Dcl)) { | ||||||
1979 | // C++1y allows return statements in constexpr constructors. | ||||||
1980 | if (!Cxx1yLoc.isValid()) | ||||||
1981 | Cxx1yLoc = S->getBeginLoc(); | ||||||
1982 | return true; | ||||||
1983 | } | ||||||
1984 | |||||||
1985 | ReturnStmts.push_back(S->getBeginLoc()); | ||||||
1986 | return true; | ||||||
1987 | |||||||
1988 | case Stmt::CompoundStmtClass: { | ||||||
1989 | // C++1y allows compound-statements. | ||||||
1990 | if (!Cxx1yLoc.isValid()) | ||||||
1991 | Cxx1yLoc = S->getBeginLoc(); | ||||||
1992 | |||||||
1993 | CompoundStmt *CompStmt = cast<CompoundStmt>(S); | ||||||
1994 | for (auto *BodyIt : CompStmt->body()) { | ||||||
1995 | if (!CheckConstexprFunctionStmt(SemaRef, Dcl, BodyIt, ReturnStmts, | ||||||
1996 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||
1997 | return false; | ||||||
1998 | } | ||||||
1999 | return true; | ||||||
2000 | } | ||||||
2001 | |||||||
2002 | case Stmt::AttributedStmtClass: | ||||||
2003 | if (!Cxx1yLoc.isValid()) | ||||||
2004 | Cxx1yLoc = S->getBeginLoc(); | ||||||
2005 | return true; | ||||||
2006 | |||||||
2007 | case Stmt::IfStmtClass: { | ||||||
2008 | // C++1y allows if-statements. | ||||||
2009 | if (!Cxx1yLoc.isValid()) | ||||||
2010 | Cxx1yLoc = S->getBeginLoc(); | ||||||
2011 | |||||||
2012 | IfStmt *If = cast<IfStmt>(S); | ||||||
2013 | if (!CheckConstexprFunctionStmt(SemaRef, Dcl, If->getThen(), ReturnStmts, | ||||||
2014 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||
2015 | return false; | ||||||
2016 | if (If->getElse() && | ||||||
2017 | !CheckConstexprFunctionStmt(SemaRef, Dcl, If->getElse(), ReturnStmts, | ||||||
2018 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||
2019 | return false; | ||||||
2020 | return true; | ||||||
2021 | } | ||||||
2022 | |||||||
2023 | case Stmt::WhileStmtClass: | ||||||
2024 | case Stmt::DoStmtClass: | ||||||
2025 | case Stmt::ForStmtClass: | ||||||
2026 | case Stmt::CXXForRangeStmtClass: | ||||||
2027 | case Stmt::ContinueStmtClass: | ||||||
2028 | // C++1y allows all of these. We don't allow them as extensions in C++11, | ||||||
2029 | // because they don't make sense without variable mutation. | ||||||
2030 | if (!SemaRef.getLangOpts().CPlusPlus14) | ||||||
2031 | break; | ||||||
2032 | if (!Cxx1yLoc.isValid()) | ||||||
2033 | Cxx1yLoc = S->getBeginLoc(); | ||||||
2034 | for (Stmt *SubStmt : S->children()) | ||||||
2035 | if (SubStmt && | ||||||
2036 | !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts, | ||||||
2037 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||
2038 | return false; | ||||||
2039 | return true; | ||||||
2040 | |||||||
2041 | case Stmt::SwitchStmtClass: | ||||||
2042 | case Stmt::CaseStmtClass: | ||||||
2043 | case Stmt::DefaultStmtClass: | ||||||
2044 | case Stmt::BreakStmtClass: | ||||||
2045 | // C++1y allows switch-statements, and since they don't need variable | ||||||
2046 | // mutation, we can reasonably allow them in C++11 as an extension. | ||||||
2047 | if (!Cxx1yLoc.isValid()) | ||||||
2048 | Cxx1yLoc = S->getBeginLoc(); | ||||||
2049 | for (Stmt *SubStmt : S->children()) | ||||||
2050 | if (SubStmt && | ||||||
2051 | !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts, | ||||||
2052 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||
2053 | return false; | ||||||
2054 | return true; | ||||||
2055 | |||||||
2056 | case Stmt::GCCAsmStmtClass: | ||||||
2057 | case Stmt::MSAsmStmtClass: | ||||||
2058 | // C++2a allows inline assembly statements. | ||||||
2059 | case Stmt::CXXTryStmtClass: | ||||||
2060 | if (Cxx2aLoc.isInvalid()) | ||||||
2061 | Cxx2aLoc = S->getBeginLoc(); | ||||||
2062 | for (Stmt *SubStmt : S->children()) { | ||||||
2063 | if (SubStmt && | ||||||
2064 | !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts, | ||||||
2065 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||
2066 | return false; | ||||||
2067 | } | ||||||
2068 | return true; | ||||||
2069 | |||||||
2070 | case Stmt::CXXCatchStmtClass: | ||||||
2071 | // Do not bother checking the language mode (already covered by the | ||||||
2072 | // try block check). | ||||||
2073 | if (!CheckConstexprFunctionStmt(SemaRef, Dcl, | ||||||
2074 | cast<CXXCatchStmt>(S)->getHandlerBlock(), | ||||||
2075 | ReturnStmts, Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||
2076 | return false; | ||||||
2077 | return true; | ||||||
2078 | |||||||
2079 | default: | ||||||
2080 | if (!isa<Expr>(S)) | ||||||
2081 | break; | ||||||
2082 | |||||||
2083 | // C++1y allows expression-statements. | ||||||
2084 | if (!Cxx1yLoc.isValid()) | ||||||
2085 | Cxx1yLoc = S->getBeginLoc(); | ||||||
2086 | return true; | ||||||
2087 | } | ||||||
2088 | |||||||
2089 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
2090 | SemaRef.Diag(S->getBeginLoc(), diag::err_constexpr_body_invalid_stmt) | ||||||
2091 | << isa<CXXConstructorDecl>(Dcl) << Dcl->isConsteval(); | ||||||
2092 | } | ||||||
2093 | return false; | ||||||
2094 | } | ||||||
2095 | |||||||
2096 | /// Check the body for the given constexpr function declaration only contains | ||||||
2097 | /// the permitted types of statement. C++11 [dcl.constexpr]p3,p4. | ||||||
2098 | /// | ||||||
2099 | /// \return true if the body is OK, false if we have found or diagnosed a | ||||||
2100 | /// problem. | ||||||
2101 | static bool CheckConstexprFunctionBody(Sema &SemaRef, const FunctionDecl *Dcl, | ||||||
2102 | Stmt *Body, | ||||||
2103 | Sema::CheckConstexprKind Kind) { | ||||||
2104 | SmallVector<SourceLocation, 4> ReturnStmts; | ||||||
2105 | |||||||
2106 | if (isa<CXXTryStmt>(Body)) { | ||||||
2107 | // C++11 [dcl.constexpr]p3: | ||||||
2108 | // The definition of a constexpr function shall satisfy the following | ||||||
2109 | // constraints: [...] | ||||||
2110 | // - its function-body shall be = delete, = default, or a | ||||||
2111 | // compound-statement | ||||||
2112 | // | ||||||
2113 | // C++11 [dcl.constexpr]p4: | ||||||
2114 | // In the definition of a constexpr constructor, [...] | ||||||
2115 | // - its function-body shall not be a function-try-block; | ||||||
2116 | // | ||||||
2117 | // This restriction is lifted in C++2a, as long as inner statements also | ||||||
2118 | // apply the general constexpr rules. | ||||||
2119 | switch (Kind) { | ||||||
2120 | case Sema::CheckConstexprKind::CheckValid: | ||||||
2121 | if (!SemaRef.getLangOpts().CPlusPlus2a) | ||||||
2122 | return false; | ||||||
2123 | break; | ||||||
2124 | |||||||
2125 | case Sema::CheckConstexprKind::Diagnose: | ||||||
2126 | SemaRef.Diag(Body->getBeginLoc(), | ||||||
2127 | !SemaRef.getLangOpts().CPlusPlus2a | ||||||
2128 | ? diag::ext_constexpr_function_try_block_cxx2a | ||||||
2129 | : diag::warn_cxx17_compat_constexpr_function_try_block) | ||||||
2130 | << isa<CXXConstructorDecl>(Dcl); | ||||||
2131 | break; | ||||||
2132 | } | ||||||
2133 | } | ||||||
2134 | |||||||
2135 | // - its function-body shall be [...] a compound-statement that contains only | ||||||
2136 | // [... list of cases ...] | ||||||
2137 | // | ||||||
2138 | // Note that walking the children here is enough to properly check for | ||||||
2139 | // CompoundStmt and CXXTryStmt body. | ||||||
2140 | SourceLocation Cxx1yLoc, Cxx2aLoc; | ||||||
2141 | for (Stmt *SubStmt : Body->children()) { | ||||||
2142 | if (SubStmt && | ||||||
2143 | !CheckConstexprFunctionStmt(SemaRef, Dcl, SubStmt, ReturnStmts, | ||||||
2144 | Cxx1yLoc, Cxx2aLoc, Kind)) | ||||||
2145 | return false; | ||||||
2146 | } | ||||||
2147 | |||||||
2148 | if (Kind == Sema::CheckConstexprKind::CheckValid) { | ||||||
2149 | // If this is only valid as an extension, report that we don't satisfy the | ||||||
2150 | // constraints of the current language. | ||||||
2151 | if ((Cxx2aLoc.isValid() && !SemaRef.getLangOpts().CPlusPlus2a) || | ||||||
2152 | (Cxx1yLoc.isValid() && !SemaRef.getLangOpts().CPlusPlus17)) | ||||||
2153 | return false; | ||||||
2154 | } else if (Cxx2aLoc.isValid()) { | ||||||
2155 | SemaRef.Diag(Cxx2aLoc, | ||||||
2156 | SemaRef.getLangOpts().CPlusPlus2a | ||||||
2157 | ? diag::warn_cxx17_compat_constexpr_body_invalid_stmt | ||||||
2158 | : diag::ext_constexpr_body_invalid_stmt_cxx2a) | ||||||
2159 | << isa<CXXConstructorDecl>(Dcl); | ||||||
2160 | } else if (Cxx1yLoc.isValid()) { | ||||||
2161 | SemaRef.Diag(Cxx1yLoc, | ||||||
2162 | SemaRef.getLangOpts().CPlusPlus14 | ||||||
2163 | ? diag::warn_cxx11_compat_constexpr_body_invalid_stmt | ||||||
2164 | : diag::ext_constexpr_body_invalid_stmt) | ||||||
2165 | << isa<CXXConstructorDecl>(Dcl); | ||||||
2166 | } | ||||||
2167 | |||||||
2168 | if (const CXXConstructorDecl *Constructor | ||||||
2169 | = dyn_cast<CXXConstructorDecl>(Dcl)) { | ||||||
2170 | const CXXRecordDecl *RD = Constructor->getParent(); | ||||||
2171 | // DR1359: | ||||||
2172 | // - every non-variant non-static data member and base class sub-object | ||||||
2173 | // shall be initialized; | ||||||
2174 | // DR1460: | ||||||
2175 | // - if the class is a union having variant members, exactly one of them | ||||||
2176 | // shall be initialized; | ||||||
2177 | if (RD->isUnion()) { | ||||||
2178 | if (Constructor->getNumCtorInitializers() == 0 && | ||||||
2179 | RD->hasVariantMembers()) { | ||||||
2180 | if (Kind == Sema::CheckConstexprKind::Diagnose) { | ||||||
2181 | SemaRef.Diag( | ||||||
2182 | Dcl->getLocation(), | ||||||
2183 | SemaRef.getLangOpts().CPlusPlus2a | ||||||
2184 | ? diag::warn_cxx17_compat_constexpr_union_ctor_no_init | ||||||
2185 | : diag::ext_constexpr_union_ctor_no_init); | ||||||
2186 | } else if (!SemaRef.getLangOpts().CPlusPlus2a) { | ||||||
2187 | return false; | ||||||
2188 | } | ||||||
2189 | } | ||||||
2190 | } else if (!Constructor->isDependentContext() && | ||||||
2191 | !Constructor->isDelegatingConstructor()) { | ||||||
2192 | assert(RD->getNumVBases() == 0 && "constexpr ctor with virtual bases")((RD->getNumVBases() == 0 && "constexpr ctor with virtual bases" ) ? static_cast<void> (0) : __assert_fail ("RD->getNumVBases() == 0 && \"constexpr ctor with virtual bases\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2192, __PRETTY_FUNCTION__)); | ||||||
2193 | |||||||
2194 | // Skip detailed checking if we have enough initializers, and we would | ||||||
2195 | // allow at most one initializer per member. | ||||||
2196 | bool AnyAnonStructUnionMembers = false; | ||||||
2197 | unsigned Fields = 0; | ||||||
2198 | for (CXXRecordDecl::field_iterator I = RD->field_begin(), | ||||||
2199 | E = RD->field_end(); I != E; ++I, ++Fields) { | ||||||
2200 | if (I->isAnonymousStructOrUnion()) { | ||||||
2201 | AnyAnonStructUnionMembers = true; | ||||||
2202 | break; | ||||||
2203 | } | ||||||
2204 | } | ||||||
2205 | // DR1460: | ||||||
2206 | // - if the class is a union-like class, but is not a union, for each of | ||||||
2207 | // its anonymous union members having variant members, exactly one of | ||||||
2208 | // them shall be initialized; | ||||||
2209 | if (AnyAnonStructUnionMembers || | ||||||
2210 | Constructor->getNumCtorInitializers() != RD->getNumBases() + Fields) { | ||||||
2211 | // Check initialization of non-static data members. Base classes are | ||||||
2212 | // always initialized so do not need to be checked. Dependent bases | ||||||
2213 | // might not have initializers in the member initializer list. | ||||||
2214 | llvm::SmallSet<Decl*, 16> Inits; | ||||||
2215 | for (const auto *I: Constructor->inits()) { | ||||||
2216 | if (FieldDecl *FD = I->getMember()) | ||||||
2217 | Inits.insert(FD); | ||||||
2218 | else if (IndirectFieldDecl *ID = I->getIndirectMember()) | ||||||
2219 | Inits.insert(ID->chain_begin(), ID->chain_end()); | ||||||
2220 | } | ||||||
2221 | |||||||
2222 | bool Diagnosed = false; | ||||||
2223 | for (auto *I : RD->fields()) | ||||||
2224 | if (!CheckConstexprCtorInitializer(SemaRef, Dcl, I, Inits, Diagnosed, | ||||||
2225 | Kind)) | ||||||
2226 | return false; | ||||||
2227 | } | ||||||
2228 | } | ||||||
2229 | } else { | ||||||
2230 | if (ReturnStmts.empty()) { | ||||||
2231 | // C++1y doesn't require constexpr functions to contain a 'return' | ||||||
2232 | // statement. We still do, unless the return type might be void, because | ||||||
2233 | // otherwise if there's no return statement, the function cannot | ||||||
2234 | // be used in a core constant expression. | ||||||
2235 | bool OK = SemaRef.getLangOpts().CPlusPlus14 && | ||||||
2236 | (Dcl->getReturnType()->isVoidType() || | ||||||
2237 | Dcl->getReturnType()->isDependentType()); | ||||||
2238 | switch (Kind) { | ||||||
2239 | case Sema::CheckConstexprKind::Diagnose: | ||||||
2240 | SemaRef.Diag(Dcl->getLocation(), | ||||||
2241 | OK ? diag::warn_cxx11_compat_constexpr_body_no_return | ||||||
2242 | : diag::err_constexpr_body_no_return) | ||||||
2243 | << Dcl->isConsteval(); | ||||||
2244 | if (!OK) | ||||||
2245 | return false; | ||||||
2246 | break; | ||||||
2247 | |||||||
2248 | case Sema::CheckConstexprKind::CheckValid: | ||||||
2249 | // The formal requirements don't include this rule in C++14, even | ||||||
2250 | // though the "must be able to produce a constant expression" rules | ||||||
2251 | // still imply it in some cases. | ||||||
2252 | if (!SemaRef.getLangOpts().CPlusPlus14) | ||||||
2253 | return false; | ||||||
2254 | break; | ||||||
2255 | } | ||||||
2256 | } else if (ReturnStmts.size() > 1) { | ||||||
2257 | switch (Kind) { | ||||||
2258 | case Sema::CheckConstexprKind::Diagnose: | ||||||
2259 | SemaRef.Diag( | ||||||
2260 | ReturnStmts.back(), | ||||||
2261 | SemaRef.getLangOpts().CPlusPlus14 | ||||||
2262 | ? diag::warn_cxx11_compat_constexpr_body_multiple_return | ||||||
2263 | : diag::ext_constexpr_body_multiple_return); | ||||||
2264 | for (unsigned I = 0; I < ReturnStmts.size() - 1; ++I) | ||||||
2265 | SemaRef.Diag(ReturnStmts[I], | ||||||
2266 | diag::note_constexpr_body_previous_return); | ||||||
2267 | break; | ||||||
2268 | |||||||
2269 | case Sema::CheckConstexprKind::CheckValid: | ||||||
2270 | if (!SemaRef.getLangOpts().CPlusPlus14) | ||||||
2271 | return false; | ||||||
2272 | break; | ||||||
2273 | } | ||||||
2274 | } | ||||||
2275 | } | ||||||
2276 | |||||||
2277 | // C++11 [dcl.constexpr]p5: | ||||||
2278 | // if no function argument values exist such that the function invocation | ||||||
2279 | // substitution would produce a constant expression, the program is | ||||||
2280 | // ill-formed; no diagnostic required. | ||||||
2281 | // C++11 [dcl.constexpr]p3: | ||||||
2282 | // - every constructor call and implicit conversion used in initializing the | ||||||
2283 | // return value shall be one of those allowed in a constant expression. | ||||||
2284 | // C++11 [dcl.constexpr]p4: | ||||||
2285 | // - every constructor involved in initializing non-static data members and | ||||||
2286 | // base class sub-objects shall be a constexpr constructor. | ||||||
2287 | // | ||||||
2288 | // Note that this rule is distinct from the "requirements for a constexpr | ||||||
2289 | // function", so is not checked in CheckValid mode. | ||||||
2290 | SmallVector<PartialDiagnosticAt, 8> Diags; | ||||||
2291 | if (Kind == Sema::CheckConstexprKind::Diagnose && | ||||||
2292 | !Expr::isPotentialConstantExpr(Dcl, Diags)) { | ||||||
2293 | SemaRef.Diag(Dcl->getLocation(), | ||||||
2294 | diag::ext_constexpr_function_never_constant_expr) | ||||||
2295 | << isa<CXXConstructorDecl>(Dcl); | ||||||
2296 | for (size_t I = 0, N = Diags.size(); I != N; ++I) | ||||||
2297 | SemaRef.Diag(Diags[I].first, Diags[I].second); | ||||||
2298 | // Don't return false here: we allow this for compatibility in | ||||||
2299 | // system headers. | ||||||
2300 | } | ||||||
2301 | |||||||
2302 | return true; | ||||||
2303 | } | ||||||
2304 | |||||||
2305 | /// Get the class that is directly named by the current context. This is the | ||||||
2306 | /// class for which an unqualified-id in this scope could name a constructor | ||||||
2307 | /// or destructor. | ||||||
2308 | /// | ||||||
2309 | /// If the scope specifier denotes a class, this will be that class. | ||||||
2310 | /// If the scope specifier is empty, this will be the class whose | ||||||
2311 | /// member-specification we are currently within. Otherwise, there | ||||||
2312 | /// is no such class. | ||||||
2313 | CXXRecordDecl *Sema::getCurrentClass(Scope *, const CXXScopeSpec *SS) { | ||||||
2314 | assert(getLangOpts().CPlusPlus && "No class names in C!")((getLangOpts().CPlusPlus && "No class names in C!") ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"No class names in C!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2314, __PRETTY_FUNCTION__)); | ||||||
2315 | |||||||
2316 | if (SS && SS->isInvalid()) | ||||||
2317 | return nullptr; | ||||||
2318 | |||||||
2319 | if (SS && SS->isNotEmpty()) { | ||||||
2320 | DeclContext *DC = computeDeclContext(*SS, true); | ||||||
2321 | return dyn_cast_or_null<CXXRecordDecl>(DC); | ||||||
2322 | } | ||||||
2323 | |||||||
2324 | return dyn_cast_or_null<CXXRecordDecl>(CurContext); | ||||||
2325 | } | ||||||
2326 | |||||||
2327 | /// isCurrentClassName - Determine whether the identifier II is the | ||||||
2328 | /// name of the class type currently being defined. In the case of | ||||||
2329 | /// nested classes, this will only return true if II is the name of | ||||||
2330 | /// the innermost class. | ||||||
2331 | bool Sema::isCurrentClassName(const IdentifierInfo &II, Scope *S, | ||||||
2332 | const CXXScopeSpec *SS) { | ||||||
2333 | CXXRecordDecl *CurDecl = getCurrentClass(S, SS); | ||||||
2334 | return CurDecl && &II == CurDecl->getIdentifier(); | ||||||
2335 | } | ||||||
2336 | |||||||
2337 | /// Determine whether the identifier II is a typo for the name of | ||||||
2338 | /// the class type currently being defined. If so, update it to the identifier | ||||||
2339 | /// that should have been used. | ||||||
2340 | bool Sema::isCurrentClassNameTypo(IdentifierInfo *&II, const CXXScopeSpec *SS) { | ||||||
2341 | assert(getLangOpts().CPlusPlus && "No class names in C!")((getLangOpts().CPlusPlus && "No class names in C!") ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"No class names in C!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2341, __PRETTY_FUNCTION__)); | ||||||
2342 | |||||||
2343 | if (!getLangOpts().SpellChecking) | ||||||
2344 | return false; | ||||||
2345 | |||||||
2346 | CXXRecordDecl *CurDecl; | ||||||
2347 | if (SS && SS->isSet() && !SS->isInvalid()) { | ||||||
2348 | DeclContext *DC = computeDeclContext(*SS, true); | ||||||
2349 | CurDecl = dyn_cast_or_null<CXXRecordDecl>(DC); | ||||||
2350 | } else | ||||||
2351 | CurDecl = dyn_cast_or_null<CXXRecordDecl>(CurContext); | ||||||
2352 | |||||||
2353 | if (CurDecl && CurDecl->getIdentifier() && II != CurDecl->getIdentifier() && | ||||||
2354 | 3 * II->getName().edit_distance(CurDecl->getIdentifier()->getName()) | ||||||
2355 | < II->getLength()) { | ||||||
2356 | II = CurDecl->getIdentifier(); | ||||||
2357 | return true; | ||||||
2358 | } | ||||||
2359 | |||||||
2360 | return false; | ||||||
2361 | } | ||||||
2362 | |||||||
2363 | /// Determine whether the given class is a base class of the given | ||||||
2364 | /// class, including looking at dependent bases. | ||||||
2365 | static bool findCircularInheritance(const CXXRecordDecl *Class, | ||||||
2366 | const CXXRecordDecl *Current) { | ||||||
2367 | SmallVector<const CXXRecordDecl*, 8> Queue; | ||||||
2368 | |||||||
2369 | Class = Class->getCanonicalDecl(); | ||||||
2370 | while (true) { | ||||||
2371 | for (const auto &I : Current->bases()) { | ||||||
2372 | CXXRecordDecl *Base = I.getType()->getAsCXXRecordDecl(); | ||||||
2373 | if (!Base) | ||||||
2374 | continue; | ||||||
2375 | |||||||
2376 | Base = Base->getDefinition(); | ||||||
2377 | if (!Base) | ||||||
2378 | continue; | ||||||
2379 | |||||||
2380 | if (Base->getCanonicalDecl() == Class) | ||||||
2381 | return true; | ||||||
2382 | |||||||
2383 | Queue.push_back(Base); | ||||||
2384 | } | ||||||
2385 | |||||||
2386 | if (Queue.empty()) | ||||||
2387 | return false; | ||||||
2388 | |||||||
2389 | Current = Queue.pop_back_val(); | ||||||
2390 | } | ||||||
2391 | |||||||
2392 | return false; | ||||||
2393 | } | ||||||
2394 | |||||||
2395 | /// Check the validity of a C++ base class specifier. | ||||||
2396 | /// | ||||||
2397 | /// \returns a new CXXBaseSpecifier if well-formed, emits diagnostics | ||||||
2398 | /// and returns NULL otherwise. | ||||||
2399 | CXXBaseSpecifier * | ||||||
2400 | Sema::CheckBaseSpecifier(CXXRecordDecl *Class, | ||||||
2401 | SourceRange SpecifierRange, | ||||||
2402 | bool Virtual, AccessSpecifier Access, | ||||||
2403 | TypeSourceInfo *TInfo, | ||||||
2404 | SourceLocation EllipsisLoc) { | ||||||
2405 | QualType BaseType = TInfo->getType(); | ||||||
2406 | |||||||
2407 | // C++ [class.union]p1: | ||||||
2408 | // A union shall not have base classes. | ||||||
2409 | if (Class->isUnion()) { | ||||||
2410 | Diag(Class->getLocation(), diag::err_base_clause_on_union) | ||||||
2411 | << SpecifierRange; | ||||||
2412 | return nullptr; | ||||||
2413 | } | ||||||
2414 | |||||||
2415 | if (EllipsisLoc.isValid() && | ||||||
2416 | !TInfo->getType()->containsUnexpandedParameterPack()) { | ||||||
2417 | Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | ||||||
2418 | << TInfo->getTypeLoc().getSourceRange(); | ||||||
2419 | EllipsisLoc = SourceLocation(); | ||||||
2420 | } | ||||||
2421 | |||||||
2422 | SourceLocation BaseLoc = TInfo->getTypeLoc().getBeginLoc(); | ||||||
2423 | |||||||
2424 | if (BaseType->isDependentType()) { | ||||||
2425 | // Make sure that we don't have circular inheritance among our dependent | ||||||
2426 | // bases. For non-dependent bases, the check for completeness below handles | ||||||
2427 | // this. | ||||||
2428 | if (CXXRecordDecl *BaseDecl = BaseType->getAsCXXRecordDecl()) { | ||||||
2429 | if (BaseDecl->getCanonicalDecl() == Class->getCanonicalDecl() || | ||||||
2430 | ((BaseDecl = BaseDecl->getDefinition()) && | ||||||
2431 | findCircularInheritance(Class, BaseDecl))) { | ||||||
2432 | Diag(BaseLoc, diag::err_circular_inheritance) | ||||||
2433 | << BaseType << Context.getTypeDeclType(Class); | ||||||
2434 | |||||||
2435 | if (BaseDecl->getCanonicalDecl() != Class->getCanonicalDecl()) | ||||||
2436 | Diag(BaseDecl->getLocation(), diag::note_previous_decl) | ||||||
2437 | << BaseType; | ||||||
2438 | |||||||
2439 | return nullptr; | ||||||
2440 | } | ||||||
2441 | } | ||||||
2442 | |||||||
2443 | return new (Context) CXXBaseSpecifier(SpecifierRange, Virtual, | ||||||
2444 | Class->getTagKind() == TTK_Class, | ||||||
2445 | Access, TInfo, EllipsisLoc); | ||||||
2446 | } | ||||||
2447 | |||||||
2448 | // Base specifiers must be record types. | ||||||
2449 | if (!BaseType->isRecordType()) { | ||||||
2450 | Diag(BaseLoc, diag::err_base_must_be_class) << SpecifierRange; | ||||||
2451 | return nullptr; | ||||||
2452 | } | ||||||
2453 | |||||||
2454 | // C++ [class.union]p1: | ||||||
2455 | // A union shall not be used as a base class. | ||||||
2456 | if (BaseType->isUnionType()) { | ||||||
2457 | Diag(BaseLoc, diag::err_union_as_base_class) << SpecifierRange; | ||||||
2458 | return nullptr; | ||||||
2459 | } | ||||||
2460 | |||||||
2461 | // For the MS ABI, propagate DLL attributes to base class templates. | ||||||
2462 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
2463 | if (Attr *ClassAttr = getDLLAttr(Class)) { | ||||||
2464 | if (auto *BaseTemplate = dyn_cast_or_null<ClassTemplateSpecializationDecl>( | ||||||
2465 | BaseType->getAsCXXRecordDecl())) { | ||||||
2466 | propagateDLLAttrToBaseClassTemplate(Class, ClassAttr, BaseTemplate, | ||||||
2467 | BaseLoc); | ||||||
2468 | } | ||||||
2469 | } | ||||||
2470 | } | ||||||
2471 | |||||||
2472 | // C++ [class.derived]p2: | ||||||
2473 | // The class-name in a base-specifier shall not be an incompletely | ||||||
2474 | // defined class. | ||||||
2475 | if (RequireCompleteType(BaseLoc, BaseType, | ||||||
2476 | diag::err_incomplete_base_class, SpecifierRange)) { | ||||||
2477 | Class->setInvalidDecl(); | ||||||
2478 | return nullptr; | ||||||
2479 | } | ||||||
2480 | |||||||
2481 | // If the base class is polymorphic or isn't empty, the new one is/isn't, too. | ||||||
2482 | RecordDecl *BaseDecl = BaseType->getAs<RecordType>()->getDecl(); | ||||||
| |||||||
2483 | assert(BaseDecl && "Record type has no declaration")((BaseDecl && "Record type has no declaration") ? static_cast <void> (0) : __assert_fail ("BaseDecl && \"Record type has no declaration\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2483, __PRETTY_FUNCTION__)); | ||||||
2484 | BaseDecl = BaseDecl->getDefinition(); | ||||||
2485 | assert(BaseDecl && "Base type is not incomplete, but has no definition")((BaseDecl && "Base type is not incomplete, but has no definition" ) ? static_cast<void> (0) : __assert_fail ("BaseDecl && \"Base type is not incomplete, but has no definition\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2485, __PRETTY_FUNCTION__)); | ||||||
2486 | CXXRecordDecl *CXXBaseDecl = cast<CXXRecordDecl>(BaseDecl); | ||||||
2487 | assert(CXXBaseDecl && "Base type is not a C++ type")((CXXBaseDecl && "Base type is not a C++ type") ? static_cast <void> (0) : __assert_fail ("CXXBaseDecl && \"Base type is not a C++ type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2487, __PRETTY_FUNCTION__)); | ||||||
2488 | |||||||
2489 | // Microsoft docs say: | ||||||
2490 | // "If a base-class has a code_seg attribute, derived classes must have the | ||||||
2491 | // same attribute." | ||||||
2492 | const auto *BaseCSA = CXXBaseDecl->getAttr<CodeSegAttr>(); | ||||||
2493 | const auto *DerivedCSA = Class->getAttr<CodeSegAttr>(); | ||||||
2494 | if ((DerivedCSA || BaseCSA) && | ||||||
2495 | (!BaseCSA || !DerivedCSA || BaseCSA->getName() != DerivedCSA->getName())) { | ||||||
2496 | Diag(Class->getLocation(), diag::err_mismatched_code_seg_base); | ||||||
2497 | Diag(CXXBaseDecl->getLocation(), diag::note_base_class_specified_here) | ||||||
2498 | << CXXBaseDecl; | ||||||
2499 | return nullptr; | ||||||
2500 | } | ||||||
2501 | |||||||
2502 | // A class which contains a flexible array member is not suitable for use as a | ||||||
2503 | // base class: | ||||||
2504 | // - If the layout determines that a base comes before another base, | ||||||
2505 | // the flexible array member would index into the subsequent base. | ||||||
2506 | // - If the layout determines that base comes before the derived class, | ||||||
2507 | // the flexible array member would index into the derived class. | ||||||
2508 | if (CXXBaseDecl->hasFlexibleArrayMember()) { | ||||||
2509 | Diag(BaseLoc, diag::err_base_class_has_flexible_array_member) | ||||||
2510 | << CXXBaseDecl->getDeclName(); | ||||||
2511 | return nullptr; | ||||||
2512 | } | ||||||
2513 | |||||||
2514 | // C++ [class]p3: | ||||||
2515 | // If a class is marked final and it appears as a base-type-specifier in | ||||||
2516 | // base-clause, the program is ill-formed. | ||||||
2517 | if (FinalAttr *FA = CXXBaseDecl->getAttr<FinalAttr>()) { | ||||||
2518 | Diag(BaseLoc, diag::err_class_marked_final_used_as_base) | ||||||
2519 | << CXXBaseDecl->getDeclName() | ||||||
2520 | << FA->isSpelledAsSealed(); | ||||||
2521 | Diag(CXXBaseDecl->getLocation(), diag::note_entity_declared_at) | ||||||
2522 | << CXXBaseDecl->getDeclName() << FA->getRange(); | ||||||
2523 | return nullptr; | ||||||
2524 | } | ||||||
2525 | |||||||
2526 | if (BaseDecl->isInvalidDecl()) | ||||||
2527 | Class->setInvalidDecl(); | ||||||
2528 | |||||||
2529 | // Create the base specifier. | ||||||
2530 | return new (Context) CXXBaseSpecifier(SpecifierRange, Virtual, | ||||||
2531 | Class->getTagKind() == TTK_Class, | ||||||
2532 | Access, TInfo, EllipsisLoc); | ||||||
2533 | } | ||||||
2534 | |||||||
2535 | /// ActOnBaseSpecifier - Parsed a base specifier. A base specifier is | ||||||
2536 | /// one entry in the base class list of a class specifier, for | ||||||
2537 | /// example: | ||||||
2538 | /// class foo : public bar, virtual private baz { | ||||||
2539 | /// 'public bar' and 'virtual private baz' are each base-specifiers. | ||||||
2540 | BaseResult | ||||||
2541 | Sema::ActOnBaseSpecifier(Decl *classdecl, SourceRange SpecifierRange, | ||||||
2542 | ParsedAttributes &Attributes, | ||||||
2543 | bool Virtual, AccessSpecifier Access, | ||||||
2544 | ParsedType basetype, SourceLocation BaseLoc, | ||||||
2545 | SourceLocation EllipsisLoc) { | ||||||
2546 | if (!classdecl) | ||||||
| |||||||
2547 | return true; | ||||||
2548 | |||||||
2549 | AdjustDeclIfTemplate(classdecl); | ||||||
2550 | CXXRecordDecl *Class = dyn_cast<CXXRecordDecl>(classdecl); | ||||||
2551 | if (!Class
| ||||||
2552 | return true; | ||||||
2553 | |||||||
2554 | // We haven't yet attached the base specifiers. | ||||||
2555 | Class->setIsParsingBaseSpecifiers(); | ||||||
2556 | |||||||
2557 | // We do not support any C++11 attributes on base-specifiers yet. | ||||||
2558 | // Diagnose any attributes we see. | ||||||
2559 | for (const ParsedAttr &AL : Attributes) { | ||||||
2560 | if (AL.isInvalid() || AL.getKind() == ParsedAttr::IgnoredAttribute) | ||||||
2561 | continue; | ||||||
2562 | Diag(AL.getLoc(), AL.getKind() == ParsedAttr::UnknownAttribute | ||||||
2563 | ? (unsigned)diag::warn_unknown_attribute_ignored | ||||||
2564 | : (unsigned)diag::err_base_specifier_attribute) | ||||||
2565 | << AL; | ||||||
2566 | } | ||||||
2567 | |||||||
2568 | TypeSourceInfo *TInfo = nullptr; | ||||||
2569 | GetTypeFromParser(basetype, &TInfo); | ||||||
2570 | |||||||
2571 | if (EllipsisLoc.isInvalid() && | ||||||
2572 | DiagnoseUnexpandedParameterPack(SpecifierRange.getBegin(), TInfo, | ||||||
2573 | UPPC_BaseType)) | ||||||
2574 | return true; | ||||||
2575 | |||||||
2576 | if (CXXBaseSpecifier *BaseSpec = CheckBaseSpecifier(Class, SpecifierRange, | ||||||
2577 | Virtual, Access, TInfo, | ||||||
2578 | EllipsisLoc)) | ||||||
2579 | return BaseSpec; | ||||||
2580 | else | ||||||
2581 | Class->setInvalidDecl(); | ||||||
2582 | |||||||
2583 | return true; | ||||||
2584 | } | ||||||
2585 | |||||||
2586 | /// Use small set to collect indirect bases. As this is only used | ||||||
2587 | /// locally, there's no need to abstract the small size parameter. | ||||||
2588 | typedef llvm::SmallPtrSet<QualType, 4> IndirectBaseSet; | ||||||
2589 | |||||||
2590 | /// Recursively add the bases of Type. Don't add Type itself. | ||||||
2591 | static void | ||||||
2592 | NoteIndirectBases(ASTContext &Context, IndirectBaseSet &Set, | ||||||
2593 | const QualType &Type) | ||||||
2594 | { | ||||||
2595 | // Even though the incoming type is a base, it might not be | ||||||
2596 | // a class -- it could be a template parm, for instance. | ||||||
2597 | if (auto Rec = Type->getAs<RecordType>()) { | ||||||
2598 | auto Decl = Rec->getAsCXXRecordDecl(); | ||||||
2599 | |||||||
2600 | // Iterate over its bases. | ||||||
2601 | for (const auto &BaseSpec : Decl->bases()) { | ||||||
2602 | QualType Base = Context.getCanonicalType(BaseSpec.getType()) | ||||||
2603 | .getUnqualifiedType(); | ||||||
2604 | if (Set.insert(Base).second) | ||||||
2605 | // If we've not already seen it, recurse. | ||||||
2606 | NoteIndirectBases(Context, Set, Base); | ||||||
2607 | } | ||||||
2608 | } | ||||||
2609 | } | ||||||
2610 | |||||||
2611 | /// Performs the actual work of attaching the given base class | ||||||
2612 | /// specifiers to a C++ class. | ||||||
2613 | bool Sema::AttachBaseSpecifiers(CXXRecordDecl *Class, | ||||||
2614 | MutableArrayRef<CXXBaseSpecifier *> Bases) { | ||||||
2615 | if (Bases.empty()) | ||||||
2616 | return false; | ||||||
2617 | |||||||
2618 | // Used to keep track of which base types we have already seen, so | ||||||
2619 | // that we can properly diagnose redundant direct base types. Note | ||||||
2620 | // that the key is always the unqualified canonical type of the base | ||||||
2621 | // class. | ||||||
2622 | std::map<QualType, CXXBaseSpecifier*, QualTypeOrdering> KnownBaseTypes; | ||||||
2623 | |||||||
2624 | // Used to track indirect bases so we can see if a direct base is | ||||||
2625 | // ambiguous. | ||||||
2626 | IndirectBaseSet IndirectBaseTypes; | ||||||
2627 | |||||||
2628 | // Copy non-redundant base specifiers into permanent storage. | ||||||
2629 | unsigned NumGoodBases = 0; | ||||||
2630 | bool Invalid = false; | ||||||
2631 | for (unsigned idx = 0; idx < Bases.size(); ++idx) { | ||||||
2632 | QualType NewBaseType | ||||||
2633 | = Context.getCanonicalType(Bases[idx]->getType()); | ||||||
2634 | NewBaseType = NewBaseType.getLocalUnqualifiedType(); | ||||||
2635 | |||||||
2636 | CXXBaseSpecifier *&KnownBase = KnownBaseTypes[NewBaseType]; | ||||||
2637 | if (KnownBase) { | ||||||
2638 | // C++ [class.mi]p3: | ||||||
2639 | // A class shall not be specified as a direct base class of a | ||||||
2640 | // derived class more than once. | ||||||
2641 | Diag(Bases[idx]->getBeginLoc(), diag::err_duplicate_base_class) | ||||||
2642 | << KnownBase->getType() << Bases[idx]->getSourceRange(); | ||||||
2643 | |||||||
2644 | // Delete the duplicate base class specifier; we're going to | ||||||
2645 | // overwrite its pointer later. | ||||||
2646 | Context.Deallocate(Bases[idx]); | ||||||
2647 | |||||||
2648 | Invalid = true; | ||||||
2649 | } else { | ||||||
2650 | // Okay, add this new base class. | ||||||
2651 | KnownBase = Bases[idx]; | ||||||
2652 | Bases[NumGoodBases++] = Bases[idx]; | ||||||
2653 | |||||||
2654 | // Note this base's direct & indirect bases, if there could be ambiguity. | ||||||
2655 | if (Bases.size() > 1) | ||||||
2656 | NoteIndirectBases(Context, IndirectBaseTypes, NewBaseType); | ||||||
2657 | |||||||
2658 | if (const RecordType *Record = NewBaseType->getAs<RecordType>()) { | ||||||
2659 | const CXXRecordDecl *RD = cast<CXXRecordDecl>(Record->getDecl()); | ||||||
2660 | if (Class->isInterface() && | ||||||
2661 | (!RD->isInterfaceLike() || | ||||||
2662 | KnownBase->getAccessSpecifier() != AS_public)) { | ||||||
2663 | // The Microsoft extension __interface does not permit bases that | ||||||
2664 | // are not themselves public interfaces. | ||||||
2665 | Diag(KnownBase->getBeginLoc(), diag::err_invalid_base_in_interface) | ||||||
2666 | << getRecordDiagFromTagKind(RD->getTagKind()) << RD | ||||||
2667 | << RD->getSourceRange(); | ||||||
2668 | Invalid = true; | ||||||
2669 | } | ||||||
2670 | if (RD->hasAttr<WeakAttr>()) | ||||||
2671 | Class->addAttr(WeakAttr::CreateImplicit(Context)); | ||||||
2672 | } | ||||||
2673 | } | ||||||
2674 | } | ||||||
2675 | |||||||
2676 | // Attach the remaining base class specifiers to the derived class. | ||||||
2677 | Class->setBases(Bases.data(), NumGoodBases); | ||||||
2678 | |||||||
2679 | // Check that the only base classes that are duplicate are virtual. | ||||||
2680 | for (unsigned idx = 0; idx < NumGoodBases; ++idx) { | ||||||
2681 | // Check whether this direct base is inaccessible due to ambiguity. | ||||||
2682 | QualType BaseType = Bases[idx]->getType(); | ||||||
2683 | |||||||
2684 | // Skip all dependent types in templates being used as base specifiers. | ||||||
2685 | // Checks below assume that the base specifier is a CXXRecord. | ||||||
2686 | if (BaseType->isDependentType()) | ||||||
2687 | continue; | ||||||
2688 | |||||||
2689 | CanQualType CanonicalBase = Context.getCanonicalType(BaseType) | ||||||
2690 | .getUnqualifiedType(); | ||||||
2691 | |||||||
2692 | if (IndirectBaseTypes.count(CanonicalBase)) { | ||||||
2693 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||
2694 | /*DetectVirtual=*/true); | ||||||
2695 | bool found | ||||||
2696 | = Class->isDerivedFrom(CanonicalBase->getAsCXXRecordDecl(), Paths); | ||||||
2697 | assert(found)((found) ? static_cast<void> (0) : __assert_fail ("found" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2697, __PRETTY_FUNCTION__)); | ||||||
2698 | (void)found; | ||||||
2699 | |||||||
2700 | if (Paths.isAmbiguous(CanonicalBase)) | ||||||
2701 | Diag(Bases[idx]->getBeginLoc(), diag::warn_inaccessible_base_class) | ||||||
2702 | << BaseType << getAmbiguousPathsDisplayString(Paths) | ||||||
2703 | << Bases[idx]->getSourceRange(); | ||||||
2704 | else | ||||||
2705 | assert(Bases[idx]->isVirtual())((Bases[idx]->isVirtual()) ? static_cast<void> (0) : __assert_fail ("Bases[idx]->isVirtual()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2705, __PRETTY_FUNCTION__)); | ||||||
2706 | } | ||||||
2707 | |||||||
2708 | // Delete the base class specifier, since its data has been copied | ||||||
2709 | // into the CXXRecordDecl. | ||||||
2710 | Context.Deallocate(Bases[idx]); | ||||||
2711 | } | ||||||
2712 | |||||||
2713 | return Invalid; | ||||||
2714 | } | ||||||
2715 | |||||||
2716 | /// ActOnBaseSpecifiers - Attach the given base specifiers to the | ||||||
2717 | /// class, after checking whether there are any duplicate base | ||||||
2718 | /// classes. | ||||||
2719 | void Sema::ActOnBaseSpecifiers(Decl *ClassDecl, | ||||||
2720 | MutableArrayRef<CXXBaseSpecifier *> Bases) { | ||||||
2721 | if (!ClassDecl || Bases.empty()) | ||||||
2722 | return; | ||||||
2723 | |||||||
2724 | AdjustDeclIfTemplate(ClassDecl); | ||||||
2725 | AttachBaseSpecifiers(cast<CXXRecordDecl>(ClassDecl), Bases); | ||||||
2726 | } | ||||||
2727 | |||||||
2728 | /// Determine whether the type \p Derived is a C++ class that is | ||||||
2729 | /// derived from the type \p Base. | ||||||
2730 | bool Sema::IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base) { | ||||||
2731 | if (!getLangOpts().CPlusPlus) | ||||||
2732 | return false; | ||||||
2733 | |||||||
2734 | CXXRecordDecl *DerivedRD = Derived->getAsCXXRecordDecl(); | ||||||
2735 | if (!DerivedRD) | ||||||
2736 | return false; | ||||||
2737 | |||||||
2738 | CXXRecordDecl *BaseRD = Base->getAsCXXRecordDecl(); | ||||||
2739 | if (!BaseRD) | ||||||
2740 | return false; | ||||||
2741 | |||||||
2742 | // If either the base or the derived type is invalid, don't try to | ||||||
2743 | // check whether one is derived from the other. | ||||||
2744 | if (BaseRD->isInvalidDecl() || DerivedRD->isInvalidDecl()) | ||||||
2745 | return false; | ||||||
2746 | |||||||
2747 | // FIXME: In a modules build, do we need the entire path to be visible for us | ||||||
2748 | // to be able to use the inheritance relationship? | ||||||
2749 | if (!isCompleteType(Loc, Derived) && !DerivedRD->isBeingDefined()) | ||||||
2750 | return false; | ||||||
2751 | |||||||
2752 | return DerivedRD->isDerivedFrom(BaseRD); | ||||||
2753 | } | ||||||
2754 | |||||||
2755 | /// Determine whether the type \p Derived is a C++ class that is | ||||||
2756 | /// derived from the type \p Base. | ||||||
2757 | bool Sema::IsDerivedFrom(SourceLocation Loc, QualType Derived, QualType Base, | ||||||
2758 | CXXBasePaths &Paths) { | ||||||
2759 | if (!getLangOpts().CPlusPlus) | ||||||
2760 | return false; | ||||||
2761 | |||||||
2762 | CXXRecordDecl *DerivedRD = Derived->getAsCXXRecordDecl(); | ||||||
2763 | if (!DerivedRD) | ||||||
2764 | return false; | ||||||
2765 | |||||||
2766 | CXXRecordDecl *BaseRD = Base->getAsCXXRecordDecl(); | ||||||
2767 | if (!BaseRD) | ||||||
2768 | return false; | ||||||
2769 | |||||||
2770 | if (!isCompleteType(Loc, Derived) && !DerivedRD->isBeingDefined()) | ||||||
2771 | return false; | ||||||
2772 | |||||||
2773 | return DerivedRD->isDerivedFrom(BaseRD, Paths); | ||||||
2774 | } | ||||||
2775 | |||||||
2776 | static void BuildBasePathArray(const CXXBasePath &Path, | ||||||
2777 | CXXCastPath &BasePathArray) { | ||||||
2778 | // We first go backward and check if we have a virtual base. | ||||||
2779 | // FIXME: It would be better if CXXBasePath had the base specifier for | ||||||
2780 | // the nearest virtual base. | ||||||
2781 | unsigned Start = 0; | ||||||
2782 | for (unsigned I = Path.size(); I != 0; --I) { | ||||||
2783 | if (Path[I - 1].Base->isVirtual()) { | ||||||
2784 | Start = I - 1; | ||||||
2785 | break; | ||||||
2786 | } | ||||||
2787 | } | ||||||
2788 | |||||||
2789 | // Now add all bases. | ||||||
2790 | for (unsigned I = Start, E = Path.size(); I != E; ++I) | ||||||
2791 | BasePathArray.push_back(const_cast<CXXBaseSpecifier*>(Path[I].Base)); | ||||||
2792 | } | ||||||
2793 | |||||||
2794 | |||||||
2795 | void Sema::BuildBasePathArray(const CXXBasePaths &Paths, | ||||||
2796 | CXXCastPath &BasePathArray) { | ||||||
2797 | assert(BasePathArray.empty() && "Base path array must be empty!")((BasePathArray.empty() && "Base path array must be empty!" ) ? static_cast<void> (0) : __assert_fail ("BasePathArray.empty() && \"Base path array must be empty!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2797, __PRETTY_FUNCTION__)); | ||||||
2798 | assert(Paths.isRecordingPaths() && "Must record paths!")((Paths.isRecordingPaths() && "Must record paths!") ? static_cast<void> (0) : __assert_fail ("Paths.isRecordingPaths() && \"Must record paths!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2798, __PRETTY_FUNCTION__)); | ||||||
2799 | return ::BuildBasePathArray(Paths.front(), BasePathArray); | ||||||
2800 | } | ||||||
2801 | /// CheckDerivedToBaseConversion - Check whether the Derived-to-Base | ||||||
2802 | /// conversion (where Derived and Base are class types) is | ||||||
2803 | /// well-formed, meaning that the conversion is unambiguous (and | ||||||
2804 | /// that all of the base classes are accessible). Returns true | ||||||
2805 | /// and emits a diagnostic if the code is ill-formed, returns false | ||||||
2806 | /// otherwise. Loc is the location where this routine should point to | ||||||
2807 | /// if there is an error, and Range is the source range to highlight | ||||||
2808 | /// if there is an error. | ||||||
2809 | /// | ||||||
2810 | /// If either InaccessibleBaseID or AmbigiousBaseConvID are 0, then the | ||||||
2811 | /// diagnostic for the respective type of error will be suppressed, but the | ||||||
2812 | /// check for ill-formed code will still be performed. | ||||||
2813 | bool | ||||||
2814 | Sema::CheckDerivedToBaseConversion(QualType Derived, QualType Base, | ||||||
2815 | unsigned InaccessibleBaseID, | ||||||
2816 | unsigned AmbigiousBaseConvID, | ||||||
2817 | SourceLocation Loc, SourceRange Range, | ||||||
2818 | DeclarationName Name, | ||||||
2819 | CXXCastPath *BasePath, | ||||||
2820 | bool IgnoreAccess) { | ||||||
2821 | // First, determine whether the path from Derived to Base is | ||||||
2822 | // ambiguous. This is slightly more expensive than checking whether | ||||||
2823 | // the Derived to Base conversion exists, because here we need to | ||||||
2824 | // explore multiple paths to determine if there is an ambiguity. | ||||||
2825 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||
2826 | /*DetectVirtual=*/false); | ||||||
2827 | bool DerivationOkay = IsDerivedFrom(Loc, Derived, Base, Paths); | ||||||
2828 | if (!DerivationOkay) | ||||||
2829 | return true; | ||||||
2830 | |||||||
2831 | const CXXBasePath *Path = nullptr; | ||||||
2832 | if (!Paths.isAmbiguous(Context.getCanonicalType(Base).getUnqualifiedType())) | ||||||
2833 | Path = &Paths.front(); | ||||||
2834 | |||||||
2835 | // For MSVC compatibility, check if Derived directly inherits from Base. Clang | ||||||
2836 | // warns about this hierarchy under -Winaccessible-base, but MSVC allows the | ||||||
2837 | // user to access such bases. | ||||||
2838 | if (!Path && getLangOpts().MSVCCompat) { | ||||||
2839 | for (const CXXBasePath &PossiblePath : Paths) { | ||||||
2840 | if (PossiblePath.size() == 1) { | ||||||
2841 | Path = &PossiblePath; | ||||||
2842 | if (AmbigiousBaseConvID) | ||||||
2843 | Diag(Loc, diag::ext_ms_ambiguous_direct_base) | ||||||
2844 | << Base << Derived << Range; | ||||||
2845 | break; | ||||||
2846 | } | ||||||
2847 | } | ||||||
2848 | } | ||||||
2849 | |||||||
2850 | if (Path) { | ||||||
2851 | if (!IgnoreAccess) { | ||||||
2852 | // Check that the base class can be accessed. | ||||||
2853 | switch ( | ||||||
2854 | CheckBaseClassAccess(Loc, Base, Derived, *Path, InaccessibleBaseID)) { | ||||||
2855 | case AR_inaccessible: | ||||||
2856 | return true; | ||||||
2857 | case AR_accessible: | ||||||
2858 | case AR_dependent: | ||||||
2859 | case AR_delayed: | ||||||
2860 | break; | ||||||
2861 | } | ||||||
2862 | } | ||||||
2863 | |||||||
2864 | // Build a base path if necessary. | ||||||
2865 | if (BasePath) | ||||||
2866 | ::BuildBasePathArray(*Path, *BasePath); | ||||||
2867 | return false; | ||||||
2868 | } | ||||||
2869 | |||||||
2870 | if (AmbigiousBaseConvID) { | ||||||
2871 | // We know that the derived-to-base conversion is ambiguous, and | ||||||
2872 | // we're going to produce a diagnostic. Perform the derived-to-base | ||||||
2873 | // search just one more time to compute all of the possible paths so | ||||||
2874 | // that we can print them out. This is more expensive than any of | ||||||
2875 | // the previous derived-to-base checks we've done, but at this point | ||||||
2876 | // performance isn't as much of an issue. | ||||||
2877 | Paths.clear(); | ||||||
2878 | Paths.setRecordingPaths(true); | ||||||
2879 | bool StillOkay = IsDerivedFrom(Loc, Derived, Base, Paths); | ||||||
2880 | assert(StillOkay && "Can only be used with a derived-to-base conversion")((StillOkay && "Can only be used with a derived-to-base conversion" ) ? static_cast<void> (0) : __assert_fail ("StillOkay && \"Can only be used with a derived-to-base conversion\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2880, __PRETTY_FUNCTION__)); | ||||||
2881 | (void)StillOkay; | ||||||
2882 | |||||||
2883 | // Build up a textual representation of the ambiguous paths, e.g., | ||||||
2884 | // D -> B -> A, that will be used to illustrate the ambiguous | ||||||
2885 | // conversions in the diagnostic. We only print one of the paths | ||||||
2886 | // to each base class subobject. | ||||||
2887 | std::string PathDisplayStr = getAmbiguousPathsDisplayString(Paths); | ||||||
2888 | |||||||
2889 | Diag(Loc, AmbigiousBaseConvID) | ||||||
2890 | << Derived << Base << PathDisplayStr << Range << Name; | ||||||
2891 | } | ||||||
2892 | return true; | ||||||
2893 | } | ||||||
2894 | |||||||
2895 | bool | ||||||
2896 | Sema::CheckDerivedToBaseConversion(QualType Derived, QualType Base, | ||||||
2897 | SourceLocation Loc, SourceRange Range, | ||||||
2898 | CXXCastPath *BasePath, | ||||||
2899 | bool IgnoreAccess) { | ||||||
2900 | return CheckDerivedToBaseConversion( | ||||||
2901 | Derived, Base, diag::err_upcast_to_inaccessible_base, | ||||||
2902 | diag::err_ambiguous_derived_to_base_conv, Loc, Range, DeclarationName(), | ||||||
2903 | BasePath, IgnoreAccess); | ||||||
2904 | } | ||||||
2905 | |||||||
2906 | |||||||
2907 | /// Builds a string representing ambiguous paths from a | ||||||
2908 | /// specific derived class to different subobjects of the same base | ||||||
2909 | /// class. | ||||||
2910 | /// | ||||||
2911 | /// This function builds a string that can be used in error messages | ||||||
2912 | /// to show the different paths that one can take through the | ||||||
2913 | /// inheritance hierarchy to go from the derived class to different | ||||||
2914 | /// subobjects of a base class. The result looks something like this: | ||||||
2915 | /// @code | ||||||
2916 | /// struct D -> struct B -> struct A | ||||||
2917 | /// struct D -> struct C -> struct A | ||||||
2918 | /// @endcode | ||||||
2919 | std::string Sema::getAmbiguousPathsDisplayString(CXXBasePaths &Paths) { | ||||||
2920 | std::string PathDisplayStr; | ||||||
2921 | std::set<unsigned> DisplayedPaths; | ||||||
2922 | for (CXXBasePaths::paths_iterator Path = Paths.begin(); | ||||||
2923 | Path != Paths.end(); ++Path) { | ||||||
2924 | if (DisplayedPaths.insert(Path->back().SubobjectNumber).second) { | ||||||
2925 | // We haven't displayed a path to this particular base | ||||||
2926 | // class subobject yet. | ||||||
2927 | PathDisplayStr += "\n "; | ||||||
2928 | PathDisplayStr += Context.getTypeDeclType(Paths.getOrigin()).getAsString(); | ||||||
2929 | for (CXXBasePath::const_iterator Element = Path->begin(); | ||||||
2930 | Element != Path->end(); ++Element) | ||||||
2931 | PathDisplayStr += " -> " + Element->Base->getType().getAsString(); | ||||||
2932 | } | ||||||
2933 | } | ||||||
2934 | |||||||
2935 | return PathDisplayStr; | ||||||
2936 | } | ||||||
2937 | |||||||
2938 | //===----------------------------------------------------------------------===// | ||||||
2939 | // C++ class member Handling | ||||||
2940 | //===----------------------------------------------------------------------===// | ||||||
2941 | |||||||
2942 | /// ActOnAccessSpecifier - Parsed an access specifier followed by a colon. | ||||||
2943 | bool Sema::ActOnAccessSpecifier(AccessSpecifier Access, SourceLocation ASLoc, | ||||||
2944 | SourceLocation ColonLoc, | ||||||
2945 | const ParsedAttributesView &Attrs) { | ||||||
2946 | assert(Access != AS_none && "Invalid kind for syntactic access specifier!")((Access != AS_none && "Invalid kind for syntactic access specifier!" ) ? static_cast<void> (0) : __assert_fail ("Access != AS_none && \"Invalid kind for syntactic access specifier!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 2946, __PRETTY_FUNCTION__)); | ||||||
2947 | AccessSpecDecl *ASDecl = AccessSpecDecl::Create(Context, Access, CurContext, | ||||||
2948 | ASLoc, ColonLoc); | ||||||
2949 | CurContext->addHiddenDecl(ASDecl); | ||||||
2950 | return ProcessAccessDeclAttributeList(ASDecl, Attrs); | ||||||
2951 | } | ||||||
2952 | |||||||
2953 | /// CheckOverrideControl - Check C++11 override control semantics. | ||||||
2954 | void Sema::CheckOverrideControl(NamedDecl *D) { | ||||||
2955 | if (D->isInvalidDecl()) | ||||||
2956 | return; | ||||||
2957 | |||||||
2958 | // We only care about "override" and "final" declarations. | ||||||
2959 | if (!D->hasAttr<OverrideAttr>() && !D->hasAttr<FinalAttr>()) | ||||||
2960 | return; | ||||||
2961 | |||||||
2962 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D); | ||||||
2963 | |||||||
2964 | // We can't check dependent instance methods. | ||||||
2965 | if (MD && MD->isInstance() && | ||||||
2966 | (MD->getParent()->hasAnyDependentBases() || | ||||||
2967 | MD->getType()->isDependentType())) | ||||||
2968 | return; | ||||||
2969 | |||||||
2970 | if (MD && !MD->isVirtual()) { | ||||||
2971 | // If we have a non-virtual method, check if if hides a virtual method. | ||||||
2972 | // (In that case, it's most likely the method has the wrong type.) | ||||||
2973 | SmallVector<CXXMethodDecl *, 8> OverloadedMethods; | ||||||
2974 | FindHiddenVirtualMethods(MD, OverloadedMethods); | ||||||
2975 | |||||||
2976 | if (!OverloadedMethods.empty()) { | ||||||
2977 | if (OverrideAttr *OA = D->getAttr<OverrideAttr>()) { | ||||||
2978 | Diag(OA->getLocation(), | ||||||
2979 | diag::override_keyword_hides_virtual_member_function) | ||||||
2980 | << "override" << (OverloadedMethods.size() > 1); | ||||||
2981 | } else if (FinalAttr *FA = D->getAttr<FinalAttr>()) { | ||||||
2982 | Diag(FA->getLocation(), | ||||||
2983 | diag::override_keyword_hides_virtual_member_function) | ||||||
2984 | << (FA->isSpelledAsSealed() ? "sealed" : "final") | ||||||
2985 | << (OverloadedMethods.size() > 1); | ||||||
2986 | } | ||||||
2987 | NoteHiddenVirtualMethods(MD, OverloadedMethods); | ||||||
2988 | MD->setInvalidDecl(); | ||||||
2989 | return; | ||||||
2990 | } | ||||||
2991 | // Fall through into the general case diagnostic. | ||||||
2992 | // FIXME: We might want to attempt typo correction here. | ||||||
2993 | } | ||||||
2994 | |||||||
2995 | if (!MD || !MD->isVirtual()) { | ||||||
2996 | if (OverrideAttr *OA = D->getAttr<OverrideAttr>()) { | ||||||
2997 | Diag(OA->getLocation(), | ||||||
2998 | diag::override_keyword_only_allowed_on_virtual_member_functions) | ||||||
2999 | << "override" << FixItHint::CreateRemoval(OA->getLocation()); | ||||||
3000 | D->dropAttr<OverrideAttr>(); | ||||||
3001 | } | ||||||
3002 | if (FinalAttr *FA = D->getAttr<FinalAttr>()) { | ||||||
3003 | Diag(FA->getLocation(), | ||||||
3004 | diag::override_keyword_only_allowed_on_virtual_member_functions) | ||||||
3005 | << (FA->isSpelledAsSealed() ? "sealed" : "final") | ||||||
3006 | << FixItHint::CreateRemoval(FA->getLocation()); | ||||||
3007 | D->dropAttr<FinalAttr>(); | ||||||
3008 | } | ||||||
3009 | return; | ||||||
3010 | } | ||||||
3011 | |||||||
3012 | // C++11 [class.virtual]p5: | ||||||
3013 | // If a function is marked with the virt-specifier override and | ||||||
3014 | // does not override a member function of a base class, the program is | ||||||
3015 | // ill-formed. | ||||||
3016 | bool HasOverriddenMethods = MD->size_overridden_methods() != 0; | ||||||
3017 | if (MD->hasAttr<OverrideAttr>() && !HasOverriddenMethods) | ||||||
3018 | Diag(MD->getLocation(), diag::err_function_marked_override_not_overriding) | ||||||
3019 | << MD->getDeclName(); | ||||||
3020 | } | ||||||
3021 | |||||||
3022 | void Sema::DiagnoseAbsenceOfOverrideControl(NamedDecl *D) { | ||||||
3023 | if (D->isInvalidDecl() || D->hasAttr<OverrideAttr>()) | ||||||
3024 | return; | ||||||
3025 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D); | ||||||
3026 | if (!MD || MD->isImplicit() || MD->hasAttr<FinalAttr>()) | ||||||
3027 | return; | ||||||
3028 | |||||||
3029 | SourceLocation Loc = MD->getLocation(); | ||||||
3030 | SourceLocation SpellingLoc = Loc; | ||||||
3031 | if (getSourceManager().isMacroArgExpansion(Loc)) | ||||||
3032 | SpellingLoc = getSourceManager().getImmediateExpansionRange(Loc).getBegin(); | ||||||
3033 | SpellingLoc = getSourceManager().getSpellingLoc(SpellingLoc); | ||||||
3034 | if (SpellingLoc.isValid() && getSourceManager().isInSystemHeader(SpellingLoc)) | ||||||
3035 | return; | ||||||
3036 | |||||||
3037 | if (MD->size_overridden_methods() > 0) { | ||||||
3038 | unsigned DiagID = isa<CXXDestructorDecl>(MD) | ||||||
3039 | ? diag::warn_destructor_marked_not_override_overriding | ||||||
3040 | : diag::warn_function_marked_not_override_overriding; | ||||||
3041 | Diag(MD->getLocation(), DiagID) << MD->getDeclName(); | ||||||
3042 | const CXXMethodDecl *OMD = *MD->begin_overridden_methods(); | ||||||
3043 | Diag(OMD->getLocation(), diag::note_overridden_virtual_function); | ||||||
3044 | } | ||||||
3045 | } | ||||||
3046 | |||||||
3047 | /// CheckIfOverriddenFunctionIsMarkedFinal - Checks whether a virtual member | ||||||
3048 | /// function overrides a virtual member function marked 'final', according to | ||||||
3049 | /// C++11 [class.virtual]p4. | ||||||
3050 | bool Sema::CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, | ||||||
3051 | const CXXMethodDecl *Old) { | ||||||
3052 | FinalAttr *FA = Old->getAttr<FinalAttr>(); | ||||||
3053 | if (!FA) | ||||||
3054 | return false; | ||||||
3055 | |||||||
3056 | Diag(New->getLocation(), diag::err_final_function_overridden) | ||||||
3057 | << New->getDeclName() | ||||||
3058 | << FA->isSpelledAsSealed(); | ||||||
3059 | Diag(Old->getLocation(), diag::note_overridden_virtual_function); | ||||||
3060 | return true; | ||||||
3061 | } | ||||||
3062 | |||||||
3063 | static bool InitializationHasSideEffects(const FieldDecl &FD) { | ||||||
3064 | const Type *T = FD.getType()->getBaseElementTypeUnsafe(); | ||||||
3065 | // FIXME: Destruction of ObjC lifetime types has side-effects. | ||||||
3066 | if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl()) | ||||||
3067 | return !RD->isCompleteDefinition() || | ||||||
3068 | !RD->hasTrivialDefaultConstructor() || | ||||||
3069 | !RD->hasTrivialDestructor(); | ||||||
3070 | return false; | ||||||
3071 | } | ||||||
3072 | |||||||
3073 | static const ParsedAttr *getMSPropertyAttr(const ParsedAttributesView &list) { | ||||||
3074 | ParsedAttributesView::const_iterator Itr = | ||||||
3075 | llvm::find_if(list, [](const ParsedAttr &AL) { | ||||||
3076 | return AL.isDeclspecPropertyAttribute(); | ||||||
3077 | }); | ||||||
3078 | if (Itr != list.end()) | ||||||
3079 | return &*Itr; | ||||||
3080 | return nullptr; | ||||||
3081 | } | ||||||
3082 | |||||||
3083 | // Check if there is a field shadowing. | ||||||
3084 | void Sema::CheckShadowInheritedFields(const SourceLocation &Loc, | ||||||
3085 | DeclarationName FieldName, | ||||||
3086 | const CXXRecordDecl *RD, | ||||||
3087 | bool DeclIsField) { | ||||||
3088 | if (Diags.isIgnored(diag::warn_shadow_field, Loc)) | ||||||
3089 | return; | ||||||
3090 | |||||||
3091 | // To record a shadowed field in a base | ||||||
3092 | std::map<CXXRecordDecl*, NamedDecl*> Bases; | ||||||
3093 | auto FieldShadowed = [&](const CXXBaseSpecifier *Specifier, | ||||||
3094 | CXXBasePath &Path) { | ||||||
3095 | const auto Base = Specifier->getType()->getAsCXXRecordDecl(); | ||||||
3096 | // Record an ambiguous path directly | ||||||
3097 | if (Bases.find(Base) != Bases.end()) | ||||||
3098 | return true; | ||||||
3099 | for (const auto Field : Base->lookup(FieldName)) { | ||||||
3100 | if ((isa<FieldDecl>(Field) || isa<IndirectFieldDecl>(Field)) && | ||||||
3101 | Field->getAccess() != AS_private) { | ||||||
3102 | assert(Field->getAccess() != AS_none)((Field->getAccess() != AS_none) ? static_cast<void> (0) : __assert_fail ("Field->getAccess() != AS_none", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3102, __PRETTY_FUNCTION__)); | ||||||
3103 | assert(Bases.find(Base) == Bases.end())((Bases.find(Base) == Bases.end()) ? static_cast<void> ( 0) : __assert_fail ("Bases.find(Base) == Bases.end()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3103, __PRETTY_FUNCTION__)); | ||||||
3104 | Bases[Base] = Field; | ||||||
3105 | return true; | ||||||
3106 | } | ||||||
3107 | } | ||||||
3108 | return false; | ||||||
3109 | }; | ||||||
3110 | |||||||
3111 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||
3112 | /*DetectVirtual=*/true); | ||||||
3113 | if (!RD->lookupInBases(FieldShadowed, Paths)) | ||||||
3114 | return; | ||||||
3115 | |||||||
3116 | for (const auto &P : Paths) { | ||||||
3117 | auto Base = P.back().Base->getType()->getAsCXXRecordDecl(); | ||||||
3118 | auto It = Bases.find(Base); | ||||||
3119 | // Skip duplicated bases | ||||||
3120 | if (It == Bases.end()) | ||||||
3121 | continue; | ||||||
3122 | auto BaseField = It->second; | ||||||
3123 | assert(BaseField->getAccess() != AS_private)((BaseField->getAccess() != AS_private) ? static_cast<void > (0) : __assert_fail ("BaseField->getAccess() != AS_private" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3123, __PRETTY_FUNCTION__)); | ||||||
3124 | if (AS_none != | ||||||
3125 | CXXRecordDecl::MergeAccess(P.Access, BaseField->getAccess())) { | ||||||
3126 | Diag(Loc, diag::warn_shadow_field) | ||||||
3127 | << FieldName << RD << Base << DeclIsField; | ||||||
3128 | Diag(BaseField->getLocation(), diag::note_shadow_field); | ||||||
3129 | Bases.erase(It); | ||||||
3130 | } | ||||||
3131 | } | ||||||
3132 | } | ||||||
3133 | |||||||
3134 | /// ActOnCXXMemberDeclarator - This is invoked when a C++ class member | ||||||
3135 | /// declarator is parsed. 'AS' is the access specifier, 'BW' specifies the | ||||||
3136 | /// bitfield width if there is one, 'InitExpr' specifies the initializer if | ||||||
3137 | /// one has been parsed, and 'InitStyle' is set if an in-class initializer is | ||||||
3138 | /// present (but parsing it has been deferred). | ||||||
3139 | NamedDecl * | ||||||
3140 | Sema::ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, Declarator &D, | ||||||
3141 | MultiTemplateParamsArg TemplateParameterLists, | ||||||
3142 | Expr *BW, const VirtSpecifiers &VS, | ||||||
3143 | InClassInitStyle InitStyle) { | ||||||
3144 | const DeclSpec &DS = D.getDeclSpec(); | ||||||
3145 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||
3146 | DeclarationName Name = NameInfo.getName(); | ||||||
3147 | SourceLocation Loc = NameInfo.getLoc(); | ||||||
3148 | |||||||
3149 | // For anonymous bitfields, the location should point to the type. | ||||||
3150 | if (Loc.isInvalid()) | ||||||
3151 | Loc = D.getBeginLoc(); | ||||||
3152 | |||||||
3153 | Expr *BitWidth = static_cast<Expr*>(BW); | ||||||
3154 | |||||||
3155 | assert(isa<CXXRecordDecl>(CurContext))((isa<CXXRecordDecl>(CurContext)) ? static_cast<void > (0) : __assert_fail ("isa<CXXRecordDecl>(CurContext)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3155, __PRETTY_FUNCTION__)); | ||||||
3156 | assert(!DS.isFriendSpecified())((!DS.isFriendSpecified()) ? static_cast<void> (0) : __assert_fail ("!DS.isFriendSpecified()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3156, __PRETTY_FUNCTION__)); | ||||||
3157 | |||||||
3158 | bool isFunc = D.isDeclarationOfFunction(); | ||||||
3159 | const ParsedAttr *MSPropertyAttr = | ||||||
3160 | getMSPropertyAttr(D.getDeclSpec().getAttributes()); | ||||||
3161 | |||||||
3162 | if (cast<CXXRecordDecl>(CurContext)->isInterface()) { | ||||||
3163 | // The Microsoft extension __interface only permits public member functions | ||||||
3164 | // and prohibits constructors, destructors, operators, non-public member | ||||||
3165 | // functions, static methods and data members. | ||||||
3166 | unsigned InvalidDecl; | ||||||
3167 | bool ShowDeclName = true; | ||||||
3168 | if (!isFunc && | ||||||
3169 | (DS.getStorageClassSpec() == DeclSpec::SCS_typedef || MSPropertyAttr)) | ||||||
3170 | InvalidDecl = 0; | ||||||
3171 | else if (!isFunc) | ||||||
3172 | InvalidDecl = 1; | ||||||
3173 | else if (AS != AS_public) | ||||||
3174 | InvalidDecl = 2; | ||||||
3175 | else if (DS.getStorageClassSpec() == DeclSpec::SCS_static) | ||||||
3176 | InvalidDecl = 3; | ||||||
3177 | else switch (Name.getNameKind()) { | ||||||
3178 | case DeclarationName::CXXConstructorName: | ||||||
3179 | InvalidDecl = 4; | ||||||
3180 | ShowDeclName = false; | ||||||
3181 | break; | ||||||
3182 | |||||||
3183 | case DeclarationName::CXXDestructorName: | ||||||
3184 | InvalidDecl = 5; | ||||||
3185 | ShowDeclName = false; | ||||||
3186 | break; | ||||||
3187 | |||||||
3188 | case DeclarationName::CXXOperatorName: | ||||||
3189 | case DeclarationName::CXXConversionFunctionName: | ||||||
3190 | InvalidDecl = 6; | ||||||
3191 | break; | ||||||
3192 | |||||||
3193 | default: | ||||||
3194 | InvalidDecl = 0; | ||||||
3195 | break; | ||||||
3196 | } | ||||||
3197 | |||||||
3198 | if (InvalidDecl) { | ||||||
3199 | if (ShowDeclName) | ||||||
3200 | Diag(Loc, diag::err_invalid_member_in_interface) | ||||||
3201 | << (InvalidDecl-1) << Name; | ||||||
3202 | else | ||||||
3203 | Diag(Loc, diag::err_invalid_member_in_interface) | ||||||
3204 | << (InvalidDecl-1) << ""; | ||||||
3205 | return nullptr; | ||||||
3206 | } | ||||||
3207 | } | ||||||
3208 | |||||||
3209 | // C++ 9.2p6: A member shall not be declared to have automatic storage | ||||||
3210 | // duration (auto, register) or with the extern storage-class-specifier. | ||||||
3211 | // C++ 7.1.1p8: The mutable specifier can be applied only to names of class | ||||||
3212 | // data members and cannot be applied to names declared const or static, | ||||||
3213 | // and cannot be applied to reference members. | ||||||
3214 | switch (DS.getStorageClassSpec()) { | ||||||
3215 | case DeclSpec::SCS_unspecified: | ||||||
3216 | case DeclSpec::SCS_typedef: | ||||||
3217 | case DeclSpec::SCS_static: | ||||||
3218 | break; | ||||||
3219 | case DeclSpec::SCS_mutable: | ||||||
3220 | if (isFunc) { | ||||||
3221 | Diag(DS.getStorageClassSpecLoc(), diag::err_mutable_function); | ||||||
3222 | |||||||
3223 | // FIXME: It would be nicer if the keyword was ignored only for this | ||||||
3224 | // declarator. Otherwise we could get follow-up errors. | ||||||
3225 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||
3226 | } | ||||||
3227 | break; | ||||||
3228 | default: | ||||||
3229 | Diag(DS.getStorageClassSpecLoc(), | ||||||
3230 | diag::err_storageclass_invalid_for_member); | ||||||
3231 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||
3232 | break; | ||||||
3233 | } | ||||||
3234 | |||||||
3235 | bool isInstField = ((DS.getStorageClassSpec() == DeclSpec::SCS_unspecified || | ||||||
3236 | DS.getStorageClassSpec() == DeclSpec::SCS_mutable) && | ||||||
3237 | !isFunc); | ||||||
3238 | |||||||
3239 | if (DS.hasConstexprSpecifier() && isInstField) { | ||||||
3240 | SemaDiagnosticBuilder B = | ||||||
3241 | Diag(DS.getConstexprSpecLoc(), diag::err_invalid_constexpr_member); | ||||||
3242 | SourceLocation ConstexprLoc = DS.getConstexprSpecLoc(); | ||||||
3243 | if (InitStyle == ICIS_NoInit) { | ||||||
3244 | B << 0 << 0; | ||||||
3245 | if (D.getDeclSpec().getTypeQualifiers() & DeclSpec::TQ_const) | ||||||
3246 | B << FixItHint::CreateRemoval(ConstexprLoc); | ||||||
3247 | else { | ||||||
3248 | B << FixItHint::CreateReplacement(ConstexprLoc, "const"); | ||||||
3249 | D.getMutableDeclSpec().ClearConstexprSpec(); | ||||||
3250 | const char *PrevSpec; | ||||||
3251 | unsigned DiagID; | ||||||
3252 | bool Failed = D.getMutableDeclSpec().SetTypeQual( | ||||||
3253 | DeclSpec::TQ_const, ConstexprLoc, PrevSpec, DiagID, getLangOpts()); | ||||||
3254 | (void)Failed; | ||||||
3255 | assert(!Failed && "Making a constexpr member const shouldn't fail")((!Failed && "Making a constexpr member const shouldn't fail" ) ? static_cast<void> (0) : __assert_fail ("!Failed && \"Making a constexpr member const shouldn't fail\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3255, __PRETTY_FUNCTION__)); | ||||||
3256 | } | ||||||
3257 | } else { | ||||||
3258 | B << 1; | ||||||
3259 | const char *PrevSpec; | ||||||
3260 | unsigned DiagID; | ||||||
3261 | if (D.getMutableDeclSpec().SetStorageClassSpec( | ||||||
3262 | *this, DeclSpec::SCS_static, ConstexprLoc, PrevSpec, DiagID, | ||||||
3263 | Context.getPrintingPolicy())) { | ||||||
3264 | assert(DS.getStorageClassSpec() == DeclSpec::SCS_mutable &&((DS.getStorageClassSpec() == DeclSpec::SCS_mutable && "This is the only DeclSpec that should fail to be applied") ? static_cast<void> (0) : __assert_fail ("DS.getStorageClassSpec() == DeclSpec::SCS_mutable && \"This is the only DeclSpec that should fail to be applied\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3265, __PRETTY_FUNCTION__)) | ||||||
3265 | "This is the only DeclSpec that should fail to be applied")((DS.getStorageClassSpec() == DeclSpec::SCS_mutable && "This is the only DeclSpec that should fail to be applied") ? static_cast<void> (0) : __assert_fail ("DS.getStorageClassSpec() == DeclSpec::SCS_mutable && \"This is the only DeclSpec that should fail to be applied\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3265, __PRETTY_FUNCTION__)); | ||||||
3266 | B << 1; | ||||||
3267 | } else { | ||||||
3268 | B << 0 << FixItHint::CreateInsertion(ConstexprLoc, "static "); | ||||||
3269 | isInstField = false; | ||||||
3270 | } | ||||||
3271 | } | ||||||
3272 | } | ||||||
3273 | |||||||
3274 | NamedDecl *Member; | ||||||
3275 | if (isInstField) { | ||||||
3276 | CXXScopeSpec &SS = D.getCXXScopeSpec(); | ||||||
3277 | |||||||
3278 | // Data members must have identifiers for names. | ||||||
3279 | if (!Name.isIdentifier()) { | ||||||
3280 | Diag(Loc, diag::err_bad_variable_name) | ||||||
3281 | << Name; | ||||||
3282 | return nullptr; | ||||||
3283 | } | ||||||
3284 | |||||||
3285 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | ||||||
3286 | |||||||
3287 | // Member field could not be with "template" keyword. | ||||||
3288 | // So TemplateParameterLists should be empty in this case. | ||||||
3289 | if (TemplateParameterLists.size()) { | ||||||
3290 | TemplateParameterList* TemplateParams = TemplateParameterLists[0]; | ||||||
3291 | if (TemplateParams->size()) { | ||||||
3292 | // There is no such thing as a member field template. | ||||||
3293 | Diag(D.getIdentifierLoc(), diag::err_template_member) | ||||||
3294 | << II | ||||||
3295 | << SourceRange(TemplateParams->getTemplateLoc(), | ||||||
3296 | TemplateParams->getRAngleLoc()); | ||||||
3297 | } else { | ||||||
3298 | // There is an extraneous 'template<>' for this member. | ||||||
3299 | Diag(TemplateParams->getTemplateLoc(), | ||||||
3300 | diag::err_template_member_noparams) | ||||||
3301 | << II | ||||||
3302 | << SourceRange(TemplateParams->getTemplateLoc(), | ||||||
3303 | TemplateParams->getRAngleLoc()); | ||||||
3304 | } | ||||||
3305 | return nullptr; | ||||||
3306 | } | ||||||
3307 | |||||||
3308 | if (SS.isSet() && !SS.isInvalid()) { | ||||||
3309 | // The user provided a superfluous scope specifier inside a class | ||||||
3310 | // definition: | ||||||
3311 | // | ||||||
3312 | // class X { | ||||||
3313 | // int X::member; | ||||||
3314 | // }; | ||||||
3315 | if (DeclContext *DC = computeDeclContext(SS, false)) | ||||||
3316 | diagnoseQualifiedDeclaration(SS, DC, Name, D.getIdentifierLoc(), | ||||||
3317 | D.getName().getKind() == | ||||||
3318 | UnqualifiedIdKind::IK_TemplateId); | ||||||
3319 | else | ||||||
3320 | Diag(D.getIdentifierLoc(), diag::err_member_qualification) | ||||||
3321 | << Name << SS.getRange(); | ||||||
3322 | |||||||
3323 | SS.clear(); | ||||||
3324 | } | ||||||
3325 | |||||||
3326 | if (MSPropertyAttr) { | ||||||
3327 | Member = HandleMSProperty(S, cast<CXXRecordDecl>(CurContext), Loc, D, | ||||||
3328 | BitWidth, InitStyle, AS, *MSPropertyAttr); | ||||||
3329 | if (!Member) | ||||||
3330 | return nullptr; | ||||||
3331 | isInstField = false; | ||||||
3332 | } else { | ||||||
3333 | Member = HandleField(S, cast<CXXRecordDecl>(CurContext), Loc, D, | ||||||
3334 | BitWidth, InitStyle, AS); | ||||||
3335 | if (!Member) | ||||||
3336 | return nullptr; | ||||||
3337 | } | ||||||
3338 | |||||||
3339 | CheckShadowInheritedFields(Loc, Name, cast<CXXRecordDecl>(CurContext)); | ||||||
3340 | } else { | ||||||
3341 | Member = HandleDeclarator(S, D, TemplateParameterLists); | ||||||
3342 | if (!Member) | ||||||
3343 | return nullptr; | ||||||
3344 | |||||||
3345 | // Non-instance-fields can't have a bitfield. | ||||||
3346 | if (BitWidth) { | ||||||
3347 | if (Member->isInvalidDecl()) { | ||||||
3348 | // don't emit another diagnostic. | ||||||
3349 | } else if (isa<VarDecl>(Member) || isa<VarTemplateDecl>(Member)) { | ||||||
3350 | // C++ 9.6p3: A bit-field shall not be a static member. | ||||||
3351 | // "static member 'A' cannot be a bit-field" | ||||||
3352 | Diag(Loc, diag::err_static_not_bitfield) | ||||||
3353 | << Name << BitWidth->getSourceRange(); | ||||||
3354 | } else if (isa<TypedefDecl>(Member)) { | ||||||
3355 | // "typedef member 'x' cannot be a bit-field" | ||||||
3356 | Diag(Loc, diag::err_typedef_not_bitfield) | ||||||
3357 | << Name << BitWidth->getSourceRange(); | ||||||
3358 | } else { | ||||||
3359 | // A function typedef ("typedef int f(); f a;"). | ||||||
3360 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. | ||||||
3361 | Diag(Loc, diag::err_not_integral_type_bitfield) | ||||||
3362 | << Name << cast<ValueDecl>(Member)->getType() | ||||||
3363 | << BitWidth->getSourceRange(); | ||||||
3364 | } | ||||||
3365 | |||||||
3366 | BitWidth = nullptr; | ||||||
3367 | Member->setInvalidDecl(); | ||||||
3368 | } | ||||||
3369 | |||||||
3370 | NamedDecl *NonTemplateMember = Member; | ||||||
3371 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(Member)) | ||||||
3372 | NonTemplateMember = FunTmpl->getTemplatedDecl(); | ||||||
3373 | else if (VarTemplateDecl *VarTmpl = dyn_cast<VarTemplateDecl>(Member)) | ||||||
3374 | NonTemplateMember = VarTmpl->getTemplatedDecl(); | ||||||
3375 | |||||||
3376 | Member->setAccess(AS); | ||||||
3377 | |||||||
3378 | // If we have declared a member function template or static data member | ||||||
3379 | // template, set the access of the templated declaration as well. | ||||||
3380 | if (NonTemplateMember != Member) | ||||||
3381 | NonTemplateMember->setAccess(AS); | ||||||
3382 | |||||||
3383 | // C++ [temp.deduct.guide]p3: | ||||||
3384 | // A deduction guide [...] for a member class template [shall be | ||||||
3385 | // declared] with the same access [as the template]. | ||||||
3386 | if (auto *DG = dyn_cast<CXXDeductionGuideDecl>(NonTemplateMember)) { | ||||||
3387 | auto *TD = DG->getDeducedTemplate(); | ||||||
3388 | // Access specifiers are only meaningful if both the template and the | ||||||
3389 | // deduction guide are from the same scope. | ||||||
3390 | if (AS != TD->getAccess() && | ||||||
3391 | TD->getDeclContext()->getRedeclContext()->Equals( | ||||||
3392 | DG->getDeclContext()->getRedeclContext())) { | ||||||
3393 | Diag(DG->getBeginLoc(), diag::err_deduction_guide_wrong_access); | ||||||
3394 | Diag(TD->getBeginLoc(), diag::note_deduction_guide_template_access) | ||||||
3395 | << TD->getAccess(); | ||||||
3396 | const AccessSpecDecl *LastAccessSpec = nullptr; | ||||||
3397 | for (const auto *D : cast<CXXRecordDecl>(CurContext)->decls()) { | ||||||
3398 | if (const auto *AccessSpec = dyn_cast<AccessSpecDecl>(D)) | ||||||
3399 | LastAccessSpec = AccessSpec; | ||||||
3400 | } | ||||||
3401 | assert(LastAccessSpec && "differing access with no access specifier")((LastAccessSpec && "differing access with no access specifier" ) ? static_cast<void> (0) : __assert_fail ("LastAccessSpec && \"differing access with no access specifier\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3401, __PRETTY_FUNCTION__)); | ||||||
3402 | Diag(LastAccessSpec->getBeginLoc(), diag::note_deduction_guide_access) | ||||||
3403 | << AS; | ||||||
3404 | } | ||||||
3405 | } | ||||||
3406 | } | ||||||
3407 | |||||||
3408 | if (VS.isOverrideSpecified()) | ||||||
3409 | Member->addAttr(OverrideAttr::Create(Context, VS.getOverrideLoc(), | ||||||
3410 | AttributeCommonInfo::AS_Keyword)); | ||||||
3411 | if (VS.isFinalSpecified()) | ||||||
3412 | Member->addAttr(FinalAttr::Create( | ||||||
3413 | Context, VS.getFinalLoc(), AttributeCommonInfo::AS_Keyword, | ||||||
3414 | static_cast<FinalAttr::Spelling>(VS.isFinalSpelledSealed()))); | ||||||
3415 | |||||||
3416 | if (VS.getLastLocation().isValid()) { | ||||||
3417 | // Update the end location of a method that has a virt-specifiers. | ||||||
3418 | if (CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(Member)) | ||||||
3419 | MD->setRangeEnd(VS.getLastLocation()); | ||||||
3420 | } | ||||||
3421 | |||||||
3422 | CheckOverrideControl(Member); | ||||||
3423 | |||||||
3424 | assert((Name || isInstField) && "No identifier for non-field ?")(((Name || isInstField) && "No identifier for non-field ?" ) ? static_cast<void> (0) : __assert_fail ("(Name || isInstField) && \"No identifier for non-field ?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3424, __PRETTY_FUNCTION__)); | ||||||
3425 | |||||||
3426 | if (isInstField) { | ||||||
3427 | FieldDecl *FD = cast<FieldDecl>(Member); | ||||||
3428 | FieldCollector->Add(FD); | ||||||
3429 | |||||||
3430 | if (!Diags.isIgnored(diag::warn_unused_private_field, FD->getLocation())) { | ||||||
3431 | // Remember all explicit private FieldDecls that have a name, no side | ||||||
3432 | // effects and are not part of a dependent type declaration. | ||||||
3433 | if (!FD->isImplicit() && FD->getDeclName() && | ||||||
3434 | FD->getAccess() == AS_private && | ||||||
3435 | !FD->hasAttr<UnusedAttr>() && | ||||||
3436 | !FD->getParent()->isDependentContext() && | ||||||
3437 | !InitializationHasSideEffects(*FD)) | ||||||
3438 | UnusedPrivateFields.insert(FD); | ||||||
3439 | } | ||||||
3440 | } | ||||||
3441 | |||||||
3442 | return Member; | ||||||
3443 | } | ||||||
3444 | |||||||
3445 | namespace { | ||||||
3446 | class UninitializedFieldVisitor | ||||||
3447 | : public EvaluatedExprVisitor<UninitializedFieldVisitor> { | ||||||
3448 | Sema &S; | ||||||
3449 | // List of Decls to generate a warning on. Also remove Decls that become | ||||||
3450 | // initialized. | ||||||
3451 | llvm::SmallPtrSetImpl<ValueDecl*> &Decls; | ||||||
3452 | // List of base classes of the record. Classes are removed after their | ||||||
3453 | // initializers. | ||||||
3454 | llvm::SmallPtrSetImpl<QualType> &BaseClasses; | ||||||
3455 | // Vector of decls to be removed from the Decl set prior to visiting the | ||||||
3456 | // nodes. These Decls may have been initialized in the prior initializer. | ||||||
3457 | llvm::SmallVector<ValueDecl*, 4> DeclsToRemove; | ||||||
3458 | // If non-null, add a note to the warning pointing back to the constructor. | ||||||
3459 | const CXXConstructorDecl *Constructor; | ||||||
3460 | // Variables to hold state when processing an initializer list. When | ||||||
3461 | // InitList is true, special case initialization of FieldDecls matching | ||||||
3462 | // InitListFieldDecl. | ||||||
3463 | bool InitList; | ||||||
3464 | FieldDecl *InitListFieldDecl; | ||||||
3465 | llvm::SmallVector<unsigned, 4> InitFieldIndex; | ||||||
3466 | |||||||
3467 | public: | ||||||
3468 | typedef EvaluatedExprVisitor<UninitializedFieldVisitor> Inherited; | ||||||
3469 | UninitializedFieldVisitor(Sema &S, | ||||||
3470 | llvm::SmallPtrSetImpl<ValueDecl*> &Decls, | ||||||
3471 | llvm::SmallPtrSetImpl<QualType> &BaseClasses) | ||||||
3472 | : Inherited(S.Context), S(S), Decls(Decls), BaseClasses(BaseClasses), | ||||||
3473 | Constructor(nullptr), InitList(false), InitListFieldDecl(nullptr) {} | ||||||
3474 | |||||||
3475 | // Returns true if the use of ME is not an uninitialized use. | ||||||
3476 | bool IsInitListMemberExprInitialized(MemberExpr *ME, | ||||||
3477 | bool CheckReferenceOnly) { | ||||||
3478 | llvm::SmallVector<FieldDecl*, 4> Fields; | ||||||
3479 | bool ReferenceField = false; | ||||||
3480 | while (ME) { | ||||||
3481 | FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl()); | ||||||
3482 | if (!FD) | ||||||
3483 | return false; | ||||||
3484 | Fields.push_back(FD); | ||||||
3485 | if (FD->getType()->isReferenceType()) | ||||||
3486 | ReferenceField = true; | ||||||
3487 | ME = dyn_cast<MemberExpr>(ME->getBase()->IgnoreParenImpCasts()); | ||||||
3488 | } | ||||||
3489 | |||||||
3490 | // Binding a reference to an uninitialized field is not an | ||||||
3491 | // uninitialized use. | ||||||
3492 | if (CheckReferenceOnly && !ReferenceField) | ||||||
3493 | return true; | ||||||
3494 | |||||||
3495 | llvm::SmallVector<unsigned, 4> UsedFieldIndex; | ||||||
3496 | // Discard the first field since it is the field decl that is being | ||||||
3497 | // initialized. | ||||||
3498 | for (auto I = Fields.rbegin() + 1, E = Fields.rend(); I != E; ++I) { | ||||||
3499 | UsedFieldIndex.push_back((*I)->getFieldIndex()); | ||||||
3500 | } | ||||||
3501 | |||||||
3502 | for (auto UsedIter = UsedFieldIndex.begin(), | ||||||
3503 | UsedEnd = UsedFieldIndex.end(), | ||||||
3504 | OrigIter = InitFieldIndex.begin(), | ||||||
3505 | OrigEnd = InitFieldIndex.end(); | ||||||
3506 | UsedIter != UsedEnd && OrigIter != OrigEnd; ++UsedIter, ++OrigIter) { | ||||||
3507 | if (*UsedIter < *OrigIter) | ||||||
3508 | return true; | ||||||
3509 | if (*UsedIter > *OrigIter) | ||||||
3510 | break; | ||||||
3511 | } | ||||||
3512 | |||||||
3513 | return false; | ||||||
3514 | } | ||||||
3515 | |||||||
3516 | void HandleMemberExpr(MemberExpr *ME, bool CheckReferenceOnly, | ||||||
3517 | bool AddressOf) { | ||||||
3518 | if (isa<EnumConstantDecl>(ME->getMemberDecl())) | ||||||
3519 | return; | ||||||
3520 | |||||||
3521 | // FieldME is the inner-most MemberExpr that is not an anonymous struct | ||||||
3522 | // or union. | ||||||
3523 | MemberExpr *FieldME = ME; | ||||||
3524 | |||||||
3525 | bool AllPODFields = FieldME->getType().isPODType(S.Context); | ||||||
3526 | |||||||
3527 | Expr *Base = ME; | ||||||
3528 | while (MemberExpr *SubME = | ||||||
3529 | dyn_cast<MemberExpr>(Base->IgnoreParenImpCasts())) { | ||||||
3530 | |||||||
3531 | if (isa<VarDecl>(SubME->getMemberDecl())) | ||||||
3532 | return; | ||||||
3533 | |||||||
3534 | if (FieldDecl *FD = dyn_cast<FieldDecl>(SubME->getMemberDecl())) | ||||||
3535 | if (!FD->isAnonymousStructOrUnion()) | ||||||
3536 | FieldME = SubME; | ||||||
3537 | |||||||
3538 | if (!FieldME->getType().isPODType(S.Context)) | ||||||
3539 | AllPODFields = false; | ||||||
3540 | |||||||
3541 | Base = SubME->getBase(); | ||||||
3542 | } | ||||||
3543 | |||||||
3544 | if (!isa<CXXThisExpr>(Base->IgnoreParenImpCasts())) | ||||||
3545 | return; | ||||||
3546 | |||||||
3547 | if (AddressOf && AllPODFields) | ||||||
3548 | return; | ||||||
3549 | |||||||
3550 | ValueDecl* FoundVD = FieldME->getMemberDecl(); | ||||||
3551 | |||||||
3552 | if (ImplicitCastExpr *BaseCast = dyn_cast<ImplicitCastExpr>(Base)) { | ||||||
3553 | while (isa<ImplicitCastExpr>(BaseCast->getSubExpr())) { | ||||||
3554 | BaseCast = cast<ImplicitCastExpr>(BaseCast->getSubExpr()); | ||||||
3555 | } | ||||||
3556 | |||||||
3557 | if (BaseCast->getCastKind() == CK_UncheckedDerivedToBase) { | ||||||
3558 | QualType T = BaseCast->getType(); | ||||||
3559 | if (T->isPointerType() && | ||||||
3560 | BaseClasses.count(T->getPointeeType())) { | ||||||
3561 | S.Diag(FieldME->getExprLoc(), diag::warn_base_class_is_uninit) | ||||||
3562 | << T->getPointeeType() << FoundVD; | ||||||
3563 | } | ||||||
3564 | } | ||||||
3565 | } | ||||||
3566 | |||||||
3567 | if (!Decls.count(FoundVD)) | ||||||
3568 | return; | ||||||
3569 | |||||||
3570 | const bool IsReference = FoundVD->getType()->isReferenceType(); | ||||||
3571 | |||||||
3572 | if (InitList && !AddressOf && FoundVD == InitListFieldDecl) { | ||||||
3573 | // Special checking for initializer lists. | ||||||
3574 | if (IsInitListMemberExprInitialized(ME, CheckReferenceOnly)) { | ||||||
3575 | return; | ||||||
3576 | } | ||||||
3577 | } else { | ||||||
3578 | // Prevent double warnings on use of unbounded references. | ||||||
3579 | if (CheckReferenceOnly && !IsReference) | ||||||
3580 | return; | ||||||
3581 | } | ||||||
3582 | |||||||
3583 | unsigned diag = IsReference | ||||||
3584 | ? diag::warn_reference_field_is_uninit | ||||||
3585 | : diag::warn_field_is_uninit; | ||||||
3586 | S.Diag(FieldME->getExprLoc(), diag) << FoundVD; | ||||||
3587 | if (Constructor) | ||||||
3588 | S.Diag(Constructor->getLocation(), | ||||||
3589 | diag::note_uninit_in_this_constructor) | ||||||
3590 | << (Constructor->isDefaultConstructor() && Constructor->isImplicit()); | ||||||
3591 | |||||||
3592 | } | ||||||
3593 | |||||||
3594 | void HandleValue(Expr *E, bool AddressOf) { | ||||||
3595 | E = E->IgnoreParens(); | ||||||
3596 | |||||||
3597 | if (MemberExpr *ME = dyn_cast<MemberExpr>(E)) { | ||||||
3598 | HandleMemberExpr(ME, false /*CheckReferenceOnly*/, | ||||||
3599 | AddressOf /*AddressOf*/); | ||||||
3600 | return; | ||||||
3601 | } | ||||||
3602 | |||||||
3603 | if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) { | ||||||
3604 | Visit(CO->getCond()); | ||||||
3605 | HandleValue(CO->getTrueExpr(), AddressOf); | ||||||
3606 | HandleValue(CO->getFalseExpr(), AddressOf); | ||||||
3607 | return; | ||||||
3608 | } | ||||||
3609 | |||||||
3610 | if (BinaryConditionalOperator *BCO = | ||||||
3611 | dyn_cast<BinaryConditionalOperator>(E)) { | ||||||
3612 | Visit(BCO->getCond()); | ||||||
3613 | HandleValue(BCO->getFalseExpr(), AddressOf); | ||||||
3614 | return; | ||||||
3615 | } | ||||||
3616 | |||||||
3617 | if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(E)) { | ||||||
3618 | HandleValue(OVE->getSourceExpr(), AddressOf); | ||||||
3619 | return; | ||||||
3620 | } | ||||||
3621 | |||||||
3622 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | ||||||
3623 | switch (BO->getOpcode()) { | ||||||
3624 | default: | ||||||
3625 | break; | ||||||
3626 | case(BO_PtrMemD): | ||||||
3627 | case(BO_PtrMemI): | ||||||
3628 | HandleValue(BO->getLHS(), AddressOf); | ||||||
3629 | Visit(BO->getRHS()); | ||||||
3630 | return; | ||||||
3631 | case(BO_Comma): | ||||||
3632 | Visit(BO->getLHS()); | ||||||
3633 | HandleValue(BO->getRHS(), AddressOf); | ||||||
3634 | return; | ||||||
3635 | } | ||||||
3636 | } | ||||||
3637 | |||||||
3638 | Visit(E); | ||||||
3639 | } | ||||||
3640 | |||||||
3641 | void CheckInitListExpr(InitListExpr *ILE) { | ||||||
3642 | InitFieldIndex.push_back(0); | ||||||
3643 | for (auto Child : ILE->children()) { | ||||||
3644 | if (InitListExpr *SubList = dyn_cast<InitListExpr>(Child)) { | ||||||
3645 | CheckInitListExpr(SubList); | ||||||
3646 | } else { | ||||||
3647 | Visit(Child); | ||||||
3648 | } | ||||||
3649 | ++InitFieldIndex.back(); | ||||||
3650 | } | ||||||
3651 | InitFieldIndex.pop_back(); | ||||||
3652 | } | ||||||
3653 | |||||||
3654 | void CheckInitializer(Expr *E, const CXXConstructorDecl *FieldConstructor, | ||||||
3655 | FieldDecl *Field, const Type *BaseClass) { | ||||||
3656 | // Remove Decls that may have been initialized in the previous | ||||||
3657 | // initializer. | ||||||
3658 | for (ValueDecl* VD : DeclsToRemove) | ||||||
3659 | Decls.erase(VD); | ||||||
3660 | DeclsToRemove.clear(); | ||||||
3661 | |||||||
3662 | Constructor = FieldConstructor; | ||||||
3663 | InitListExpr *ILE = dyn_cast<InitListExpr>(E); | ||||||
3664 | |||||||
3665 | if (ILE && Field) { | ||||||
3666 | InitList = true; | ||||||
3667 | InitListFieldDecl = Field; | ||||||
3668 | InitFieldIndex.clear(); | ||||||
3669 | CheckInitListExpr(ILE); | ||||||
3670 | } else { | ||||||
3671 | InitList = false; | ||||||
3672 | Visit(E); | ||||||
3673 | } | ||||||
3674 | |||||||
3675 | if (Field) | ||||||
3676 | Decls.erase(Field); | ||||||
3677 | if (BaseClass) | ||||||
3678 | BaseClasses.erase(BaseClass->getCanonicalTypeInternal()); | ||||||
3679 | } | ||||||
3680 | |||||||
3681 | void VisitMemberExpr(MemberExpr *ME) { | ||||||
3682 | // All uses of unbounded reference fields will warn. | ||||||
3683 | HandleMemberExpr(ME, true /*CheckReferenceOnly*/, false /*AddressOf*/); | ||||||
3684 | } | ||||||
3685 | |||||||
3686 | void VisitImplicitCastExpr(ImplicitCastExpr *E) { | ||||||
3687 | if (E->getCastKind() == CK_LValueToRValue) { | ||||||
3688 | HandleValue(E->getSubExpr(), false /*AddressOf*/); | ||||||
3689 | return; | ||||||
3690 | } | ||||||
3691 | |||||||
3692 | Inherited::VisitImplicitCastExpr(E); | ||||||
3693 | } | ||||||
3694 | |||||||
3695 | void VisitCXXConstructExpr(CXXConstructExpr *E) { | ||||||
3696 | if (E->getConstructor()->isCopyConstructor()) { | ||||||
3697 | Expr *ArgExpr = E->getArg(0); | ||||||
3698 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(ArgExpr)) | ||||||
3699 | if (ILE->getNumInits() == 1) | ||||||
3700 | ArgExpr = ILE->getInit(0); | ||||||
3701 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr)) | ||||||
3702 | if (ICE->getCastKind() == CK_NoOp) | ||||||
3703 | ArgExpr = ICE->getSubExpr(); | ||||||
3704 | HandleValue(ArgExpr, false /*AddressOf*/); | ||||||
3705 | return; | ||||||
3706 | } | ||||||
3707 | Inherited::VisitCXXConstructExpr(E); | ||||||
3708 | } | ||||||
3709 | |||||||
3710 | void VisitCXXMemberCallExpr(CXXMemberCallExpr *E) { | ||||||
3711 | Expr *Callee = E->getCallee(); | ||||||
3712 | if (isa<MemberExpr>(Callee)) { | ||||||
3713 | HandleValue(Callee, false /*AddressOf*/); | ||||||
3714 | for (auto Arg : E->arguments()) | ||||||
3715 | Visit(Arg); | ||||||
3716 | return; | ||||||
3717 | } | ||||||
3718 | |||||||
3719 | Inherited::VisitCXXMemberCallExpr(E); | ||||||
3720 | } | ||||||
3721 | |||||||
3722 | void VisitCallExpr(CallExpr *E) { | ||||||
3723 | // Treat std::move as a use. | ||||||
3724 | if (E->isCallToStdMove()) { | ||||||
3725 | HandleValue(E->getArg(0), /*AddressOf=*/false); | ||||||
3726 | return; | ||||||
3727 | } | ||||||
3728 | |||||||
3729 | Inherited::VisitCallExpr(E); | ||||||
3730 | } | ||||||
3731 | |||||||
3732 | void VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) { | ||||||
3733 | Expr *Callee = E->getCallee(); | ||||||
3734 | |||||||
3735 | if (isa<UnresolvedLookupExpr>(Callee)) | ||||||
3736 | return Inherited::VisitCXXOperatorCallExpr(E); | ||||||
3737 | |||||||
3738 | Visit(Callee); | ||||||
3739 | for (auto Arg : E->arguments()) | ||||||
3740 | HandleValue(Arg->IgnoreParenImpCasts(), false /*AddressOf*/); | ||||||
3741 | } | ||||||
3742 | |||||||
3743 | void VisitBinaryOperator(BinaryOperator *E) { | ||||||
3744 | // If a field assignment is detected, remove the field from the | ||||||
3745 | // uninitiailized field set. | ||||||
3746 | if (E->getOpcode() == BO_Assign) | ||||||
3747 | if (MemberExpr *ME = dyn_cast<MemberExpr>(E->getLHS())) | ||||||
3748 | if (FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) | ||||||
3749 | if (!FD->getType()->isReferenceType()) | ||||||
3750 | DeclsToRemove.push_back(FD); | ||||||
3751 | |||||||
3752 | if (E->isCompoundAssignmentOp()) { | ||||||
3753 | HandleValue(E->getLHS(), false /*AddressOf*/); | ||||||
3754 | Visit(E->getRHS()); | ||||||
3755 | return; | ||||||
3756 | } | ||||||
3757 | |||||||
3758 | Inherited::VisitBinaryOperator(E); | ||||||
3759 | } | ||||||
3760 | |||||||
3761 | void VisitUnaryOperator(UnaryOperator *E) { | ||||||
3762 | if (E->isIncrementDecrementOp()) { | ||||||
3763 | HandleValue(E->getSubExpr(), false /*AddressOf*/); | ||||||
3764 | return; | ||||||
3765 | } | ||||||
3766 | if (E->getOpcode() == UO_AddrOf) { | ||||||
3767 | if (MemberExpr *ME = dyn_cast<MemberExpr>(E->getSubExpr())) { | ||||||
3768 | HandleValue(ME->getBase(), true /*AddressOf*/); | ||||||
3769 | return; | ||||||
3770 | } | ||||||
3771 | } | ||||||
3772 | |||||||
3773 | Inherited::VisitUnaryOperator(E); | ||||||
3774 | } | ||||||
3775 | }; | ||||||
3776 | |||||||
3777 | // Diagnose value-uses of fields to initialize themselves, e.g. | ||||||
3778 | // foo(foo) | ||||||
3779 | // where foo is not also a parameter to the constructor. | ||||||
3780 | // Also diagnose across field uninitialized use such as | ||||||
3781 | // x(y), y(x) | ||||||
3782 | // TODO: implement -Wuninitialized and fold this into that framework. | ||||||
3783 | static void DiagnoseUninitializedFields( | ||||||
3784 | Sema &SemaRef, const CXXConstructorDecl *Constructor) { | ||||||
3785 | |||||||
3786 | if (SemaRef.getDiagnostics().isIgnored(diag::warn_field_is_uninit, | ||||||
3787 | Constructor->getLocation())) { | ||||||
3788 | return; | ||||||
3789 | } | ||||||
3790 | |||||||
3791 | if (Constructor->isInvalidDecl()) | ||||||
3792 | return; | ||||||
3793 | |||||||
3794 | const CXXRecordDecl *RD = Constructor->getParent(); | ||||||
3795 | |||||||
3796 | if (RD->getDescribedClassTemplate()) | ||||||
3797 | return; | ||||||
3798 | |||||||
3799 | // Holds fields that are uninitialized. | ||||||
3800 | llvm::SmallPtrSet<ValueDecl*, 4> UninitializedFields; | ||||||
3801 | |||||||
3802 | // At the beginning, all fields are uninitialized. | ||||||
3803 | for (auto *I : RD->decls()) { | ||||||
3804 | if (auto *FD = dyn_cast<FieldDecl>(I)) { | ||||||
3805 | UninitializedFields.insert(FD); | ||||||
3806 | } else if (auto *IFD = dyn_cast<IndirectFieldDecl>(I)) { | ||||||
3807 | UninitializedFields.insert(IFD->getAnonField()); | ||||||
3808 | } | ||||||
3809 | } | ||||||
3810 | |||||||
3811 | llvm::SmallPtrSet<QualType, 4> UninitializedBaseClasses; | ||||||
3812 | for (auto I : RD->bases()) | ||||||
3813 | UninitializedBaseClasses.insert(I.getType().getCanonicalType()); | ||||||
3814 | |||||||
3815 | if (UninitializedFields.empty() && UninitializedBaseClasses.empty()) | ||||||
3816 | return; | ||||||
3817 | |||||||
3818 | UninitializedFieldVisitor UninitializedChecker(SemaRef, | ||||||
3819 | UninitializedFields, | ||||||
3820 | UninitializedBaseClasses); | ||||||
3821 | |||||||
3822 | for (const auto *FieldInit : Constructor->inits()) { | ||||||
3823 | if (UninitializedFields.empty() && UninitializedBaseClasses.empty()) | ||||||
3824 | break; | ||||||
3825 | |||||||
3826 | Expr *InitExpr = FieldInit->getInit(); | ||||||
3827 | if (!InitExpr) | ||||||
3828 | continue; | ||||||
3829 | |||||||
3830 | if (CXXDefaultInitExpr *Default = | ||||||
3831 | dyn_cast<CXXDefaultInitExpr>(InitExpr)) { | ||||||
3832 | InitExpr = Default->getExpr(); | ||||||
3833 | if (!InitExpr) | ||||||
3834 | continue; | ||||||
3835 | // In class initializers will point to the constructor. | ||||||
3836 | UninitializedChecker.CheckInitializer(InitExpr, Constructor, | ||||||
3837 | FieldInit->getAnyMember(), | ||||||
3838 | FieldInit->getBaseClass()); | ||||||
3839 | } else { | ||||||
3840 | UninitializedChecker.CheckInitializer(InitExpr, nullptr, | ||||||
3841 | FieldInit->getAnyMember(), | ||||||
3842 | FieldInit->getBaseClass()); | ||||||
3843 | } | ||||||
3844 | } | ||||||
3845 | } | ||||||
3846 | } // namespace | ||||||
3847 | |||||||
3848 | /// Enter a new C++ default initializer scope. After calling this, the | ||||||
3849 | /// caller must call \ref ActOnFinishCXXInClassMemberInitializer, even if | ||||||
3850 | /// parsing or instantiating the initializer failed. | ||||||
3851 | void Sema::ActOnStartCXXInClassMemberInitializer() { | ||||||
3852 | // Create a synthetic function scope to represent the call to the constructor | ||||||
3853 | // that notionally surrounds a use of this initializer. | ||||||
3854 | PushFunctionScope(); | ||||||
3855 | } | ||||||
3856 | |||||||
3857 | /// This is invoked after parsing an in-class initializer for a | ||||||
3858 | /// non-static C++ class member, and after instantiating an in-class initializer | ||||||
3859 | /// in a class template. Such actions are deferred until the class is complete. | ||||||
3860 | void Sema::ActOnFinishCXXInClassMemberInitializer(Decl *D, | ||||||
3861 | SourceLocation InitLoc, | ||||||
3862 | Expr *InitExpr) { | ||||||
3863 | // Pop the notional constructor scope we created earlier. | ||||||
3864 | PopFunctionScopeInfo(nullptr, D); | ||||||
3865 | |||||||
3866 | FieldDecl *FD = dyn_cast<FieldDecl>(D); | ||||||
3867 | assert((isa<MSPropertyDecl>(D) || FD->getInClassInitStyle() != ICIS_NoInit) &&(((isa<MSPropertyDecl>(D) || FD->getInClassInitStyle () != ICIS_NoInit) && "must set init style when field is created" ) ? static_cast<void> (0) : __assert_fail ("(isa<MSPropertyDecl>(D) || FD->getInClassInitStyle() != ICIS_NoInit) && \"must set init style when field is created\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3868, __PRETTY_FUNCTION__)) | ||||||
3868 | "must set init style when field is created")(((isa<MSPropertyDecl>(D) || FD->getInClassInitStyle () != ICIS_NoInit) && "must set init style when field is created" ) ? static_cast<void> (0) : __assert_fail ("(isa<MSPropertyDecl>(D) || FD->getInClassInitStyle() != ICIS_NoInit) && \"must set init style when field is created\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 3868, __PRETTY_FUNCTION__)); | ||||||
3869 | |||||||
3870 | if (!InitExpr) { | ||||||
3871 | D->setInvalidDecl(); | ||||||
3872 | if (FD) | ||||||
3873 | FD->removeInClassInitializer(); | ||||||
3874 | return; | ||||||
3875 | } | ||||||
3876 | |||||||
3877 | if (DiagnoseUnexpandedParameterPack(InitExpr, UPPC_Initializer)) { | ||||||
3878 | FD->setInvalidDecl(); | ||||||
3879 | FD->removeInClassInitializer(); | ||||||
3880 | return; | ||||||
3881 | } | ||||||
3882 | |||||||
3883 | ExprResult Init = InitExpr; | ||||||
3884 | if (!FD->getType()->isDependentType() && !InitExpr->isTypeDependent()) { | ||||||
3885 | InitializedEntity Entity = | ||||||
3886 | InitializedEntity::InitializeMemberFromDefaultMemberInitializer(FD); | ||||||
3887 | InitializationKind Kind = | ||||||
3888 | FD->getInClassInitStyle() == ICIS_ListInit | ||||||
3889 | ? InitializationKind::CreateDirectList(InitExpr->getBeginLoc(), | ||||||
3890 | InitExpr->getBeginLoc(), | ||||||
3891 | InitExpr->getEndLoc()) | ||||||
3892 | : InitializationKind::CreateCopy(InitExpr->getBeginLoc(), InitLoc); | ||||||
3893 | InitializationSequence Seq(*this, Entity, Kind, InitExpr); | ||||||
3894 | Init = Seq.Perform(*this, Entity, Kind, InitExpr); | ||||||
3895 | if (Init.isInvalid()) { | ||||||
3896 | FD->setInvalidDecl(); | ||||||
3897 | return; | ||||||
3898 | } | ||||||
3899 | } | ||||||
3900 | |||||||
3901 | // C++11 [class.base.init]p7: | ||||||
3902 | // The initialization of each base and member constitutes a | ||||||
3903 | // full-expression. | ||||||
3904 | Init = ActOnFinishFullExpr(Init.get(), InitLoc, /*DiscardedValue*/ false); | ||||||
3905 | if (Init.isInvalid()) { | ||||||
3906 | FD->setInvalidDecl(); | ||||||
3907 | return; | ||||||
3908 | } | ||||||
3909 | |||||||
3910 | InitExpr = Init.get(); | ||||||
3911 | |||||||
3912 | FD->setInClassInitializer(InitExpr); | ||||||
3913 | } | ||||||
3914 | |||||||
3915 | /// Find the direct and/or virtual base specifiers that | ||||||
3916 | /// correspond to the given base type, for use in base initialization | ||||||
3917 | /// within a constructor. | ||||||
3918 | static bool FindBaseInitializer(Sema &SemaRef, | ||||||
3919 | CXXRecordDecl *ClassDecl, | ||||||
3920 | QualType BaseType, | ||||||
3921 | const CXXBaseSpecifier *&DirectBaseSpec, | ||||||
3922 | const CXXBaseSpecifier *&VirtualBaseSpec) { | ||||||
3923 | // First, check for a direct base class. | ||||||
3924 | DirectBaseSpec = nullptr; | ||||||
3925 | for (const auto &Base : ClassDecl->bases()) { | ||||||
3926 | if (SemaRef.Context.hasSameUnqualifiedType(BaseType, Base.getType())) { | ||||||
3927 | // We found a direct base of this type. That's what we're | ||||||
3928 | // initializing. | ||||||
3929 | DirectBaseSpec = &Base; | ||||||
3930 | break; | ||||||
3931 | } | ||||||
3932 | } | ||||||
3933 | |||||||
3934 | // Check for a virtual base class. | ||||||
3935 | // FIXME: We might be able to short-circuit this if we know in advance that | ||||||
3936 | // there are no virtual bases. | ||||||
3937 | VirtualBaseSpec = nullptr; | ||||||
3938 | if (!DirectBaseSpec || !DirectBaseSpec->isVirtual()) { | ||||||
3939 | // We haven't found a base yet; search the class hierarchy for a | ||||||
3940 | // virtual base class. | ||||||
3941 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/true, | ||||||
3942 | /*DetectVirtual=*/false); | ||||||
3943 | if (SemaRef.IsDerivedFrom(ClassDecl->getLocation(), | ||||||
3944 | SemaRef.Context.getTypeDeclType(ClassDecl), | ||||||
3945 | BaseType, Paths)) { | ||||||
3946 | for (CXXBasePaths::paths_iterator Path = Paths.begin(); | ||||||
3947 | Path != Paths.end(); ++Path) { | ||||||
3948 | if (Path->back().Base->isVirtual()) { | ||||||
3949 | VirtualBaseSpec = Path->back().Base; | ||||||
3950 | break; | ||||||
3951 | } | ||||||
3952 | } | ||||||
3953 | } | ||||||
3954 | } | ||||||
3955 | |||||||
3956 | return DirectBaseSpec || VirtualBaseSpec; | ||||||
3957 | } | ||||||
3958 | |||||||
3959 | /// Handle a C++ member initializer using braced-init-list syntax. | ||||||
3960 | MemInitResult | ||||||
3961 | Sema::ActOnMemInitializer(Decl *ConstructorD, | ||||||
3962 | Scope *S, | ||||||
3963 | CXXScopeSpec &SS, | ||||||
3964 | IdentifierInfo *MemberOrBase, | ||||||
3965 | ParsedType TemplateTypeTy, | ||||||
3966 | const DeclSpec &DS, | ||||||
3967 | SourceLocation IdLoc, | ||||||
3968 | Expr *InitList, | ||||||
3969 | SourceLocation EllipsisLoc) { | ||||||
3970 | return BuildMemInitializer(ConstructorD, S, SS, MemberOrBase, TemplateTypeTy, | ||||||
3971 | DS, IdLoc, InitList, | ||||||
3972 | EllipsisLoc); | ||||||
3973 | } | ||||||
3974 | |||||||
3975 | /// Handle a C++ member initializer using parentheses syntax. | ||||||
3976 | MemInitResult | ||||||
3977 | Sema::ActOnMemInitializer(Decl *ConstructorD, | ||||||
3978 | Scope *S, | ||||||
3979 | CXXScopeSpec &SS, | ||||||
3980 | IdentifierInfo *MemberOrBase, | ||||||
3981 | ParsedType TemplateTypeTy, | ||||||
3982 | const DeclSpec &DS, | ||||||
3983 | SourceLocation IdLoc, | ||||||
3984 | SourceLocation LParenLoc, | ||||||
3985 | ArrayRef<Expr *> Args, | ||||||
3986 | SourceLocation RParenLoc, | ||||||
3987 | SourceLocation EllipsisLoc) { | ||||||
3988 | Expr *List = ParenListExpr::Create(Context, LParenLoc, Args, RParenLoc); | ||||||
3989 | return BuildMemInitializer(ConstructorD, S, SS, MemberOrBase, TemplateTypeTy, | ||||||
3990 | DS, IdLoc, List, EllipsisLoc); | ||||||
3991 | } | ||||||
3992 | |||||||
3993 | namespace { | ||||||
3994 | |||||||
3995 | // Callback to only accept typo corrections that can be a valid C++ member | ||||||
3996 | // intializer: either a non-static field member or a base class. | ||||||
3997 | class MemInitializerValidatorCCC final : public CorrectionCandidateCallback { | ||||||
3998 | public: | ||||||
3999 | explicit MemInitializerValidatorCCC(CXXRecordDecl *ClassDecl) | ||||||
4000 | : ClassDecl(ClassDecl) {} | ||||||
4001 | |||||||
4002 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
4003 | if (NamedDecl *ND = candidate.getCorrectionDecl()) { | ||||||
4004 | if (FieldDecl *Member = dyn_cast<FieldDecl>(ND)) | ||||||
4005 | return Member->getDeclContext()->getRedeclContext()->Equals(ClassDecl); | ||||||
4006 | return isa<TypeDecl>(ND); | ||||||
4007 | } | ||||||
4008 | return false; | ||||||
4009 | } | ||||||
4010 | |||||||
4011 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
4012 | return std::make_unique<MemInitializerValidatorCCC>(*this); | ||||||
4013 | } | ||||||
4014 | |||||||
4015 | private: | ||||||
4016 | CXXRecordDecl *ClassDecl; | ||||||
4017 | }; | ||||||
4018 | |||||||
4019 | } | ||||||
4020 | |||||||
4021 | ValueDecl *Sema::tryLookupCtorInitMemberDecl(CXXRecordDecl *ClassDecl, | ||||||
4022 | CXXScopeSpec &SS, | ||||||
4023 | ParsedType TemplateTypeTy, | ||||||
4024 | IdentifierInfo *MemberOrBase) { | ||||||
4025 | if (SS.getScopeRep() || TemplateTypeTy) | ||||||
4026 | return nullptr; | ||||||
4027 | DeclContext::lookup_result Result = ClassDecl->lookup(MemberOrBase); | ||||||
4028 | if (Result.empty()) | ||||||
4029 | return nullptr; | ||||||
4030 | ValueDecl *Member; | ||||||
4031 | if ((Member = dyn_cast<FieldDecl>(Result.front())) || | ||||||
4032 | (Member = dyn_cast<IndirectFieldDecl>(Result.front()))) | ||||||
4033 | return Member; | ||||||
4034 | return nullptr; | ||||||
4035 | } | ||||||
4036 | |||||||
4037 | /// Handle a C++ member initializer. | ||||||
4038 | MemInitResult | ||||||
4039 | Sema::BuildMemInitializer(Decl *ConstructorD, | ||||||
4040 | Scope *S, | ||||||
4041 | CXXScopeSpec &SS, | ||||||
4042 | IdentifierInfo *MemberOrBase, | ||||||
4043 | ParsedType TemplateTypeTy, | ||||||
4044 | const DeclSpec &DS, | ||||||
4045 | SourceLocation IdLoc, | ||||||
4046 | Expr *Init, | ||||||
4047 | SourceLocation EllipsisLoc) { | ||||||
4048 | ExprResult Res = CorrectDelayedTyposInExpr(Init); | ||||||
4049 | if (!Res.isUsable()) | ||||||
4050 | return true; | ||||||
4051 | Init = Res.get(); | ||||||
4052 | |||||||
4053 | if (!ConstructorD) | ||||||
4054 | return true; | ||||||
4055 | |||||||
4056 | AdjustDeclIfTemplate(ConstructorD); | ||||||
4057 | |||||||
4058 | CXXConstructorDecl *Constructor | ||||||
4059 | = dyn_cast<CXXConstructorDecl>(ConstructorD); | ||||||
4060 | if (!Constructor) { | ||||||
4061 | // The user wrote a constructor initializer on a function that is | ||||||
4062 | // not a C++ constructor. Ignore the error for now, because we may | ||||||
4063 | // have more member initializers coming; we'll diagnose it just | ||||||
4064 | // once in ActOnMemInitializers. | ||||||
4065 | return true; | ||||||
4066 | } | ||||||
4067 | |||||||
4068 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||||
4069 | |||||||
4070 | // C++ [class.base.init]p2: | ||||||
4071 | // Names in a mem-initializer-id are looked up in the scope of the | ||||||
4072 | // constructor's class and, if not found in that scope, are looked | ||||||
4073 | // up in the scope containing the constructor's definition. | ||||||
4074 | // [Note: if the constructor's class contains a member with the | ||||||
4075 | // same name as a direct or virtual base class of the class, a | ||||||
4076 | // mem-initializer-id naming the member or base class and composed | ||||||
4077 | // of a single identifier refers to the class member. A | ||||||
4078 | // mem-initializer-id for the hidden base class may be specified | ||||||
4079 | // using a qualified name. ] | ||||||
4080 | |||||||
4081 | // Look for a member, first. | ||||||
4082 | if (ValueDecl *Member = tryLookupCtorInitMemberDecl( | ||||||
4083 | ClassDecl, SS, TemplateTypeTy, MemberOrBase)) { | ||||||
4084 | if (EllipsisLoc.isValid()) | ||||||
4085 | Diag(EllipsisLoc, diag::err_pack_expansion_member_init) | ||||||
4086 | << MemberOrBase | ||||||
4087 | << SourceRange(IdLoc, Init->getSourceRange().getEnd()); | ||||||
4088 | |||||||
4089 | return BuildMemberInitializer(Member, Init, IdLoc); | ||||||
4090 | } | ||||||
4091 | // It didn't name a member, so see if it names a class. | ||||||
4092 | QualType BaseType; | ||||||
4093 | TypeSourceInfo *TInfo = nullptr; | ||||||
4094 | |||||||
4095 | if (TemplateTypeTy) { | ||||||
4096 | BaseType = GetTypeFromParser(TemplateTypeTy, &TInfo); | ||||||
4097 | if (BaseType.isNull()) | ||||||
4098 | return true; | ||||||
4099 | } else if (DS.getTypeSpecType() == TST_decltype) { | ||||||
4100 | BaseType = BuildDecltypeType(DS.getRepAsExpr(), DS.getTypeSpecTypeLoc()); | ||||||
4101 | } else if (DS.getTypeSpecType() == TST_decltype_auto) { | ||||||
4102 | Diag(DS.getTypeSpecTypeLoc(), diag::err_decltype_auto_invalid); | ||||||
4103 | return true; | ||||||
4104 | } else { | ||||||
4105 | LookupResult R(*this, MemberOrBase, IdLoc, LookupOrdinaryName); | ||||||
4106 | LookupParsedName(R, S, &SS); | ||||||
4107 | |||||||
4108 | TypeDecl *TyD = R.getAsSingle<TypeDecl>(); | ||||||
4109 | if (!TyD) { | ||||||
4110 | if (R.isAmbiguous()) return true; | ||||||
4111 | |||||||
4112 | // We don't want access-control diagnostics here. | ||||||
4113 | R.suppressDiagnostics(); | ||||||
4114 | |||||||
4115 | if (SS.isSet() && isDependentScopeSpecifier(SS)) { | ||||||
4116 | bool NotUnknownSpecialization = false; | ||||||
4117 | DeclContext *DC = computeDeclContext(SS, false); | ||||||
4118 | if (CXXRecordDecl *Record = dyn_cast_or_null<CXXRecordDecl>(DC)) | ||||||
4119 | NotUnknownSpecialization = !Record->hasAnyDependentBases(); | ||||||
4120 | |||||||
4121 | if (!NotUnknownSpecialization) { | ||||||
4122 | // When the scope specifier can refer to a member of an unknown | ||||||
4123 | // specialization, we take it as a type name. | ||||||
4124 | BaseType = CheckTypenameType(ETK_None, SourceLocation(), | ||||||
4125 | SS.getWithLocInContext(Context), | ||||||
4126 | *MemberOrBase, IdLoc); | ||||||
4127 | if (BaseType.isNull()) | ||||||
4128 | return true; | ||||||
4129 | |||||||
4130 | TInfo = Context.CreateTypeSourceInfo(BaseType); | ||||||
4131 | DependentNameTypeLoc TL = | ||||||
4132 | TInfo->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||||
4133 | if (!TL.isNull()) { | ||||||
4134 | TL.setNameLoc(IdLoc); | ||||||
4135 | TL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
4136 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
4137 | } | ||||||
4138 | |||||||
4139 | R.clear(); | ||||||
4140 | R.setLookupName(MemberOrBase); | ||||||
4141 | } | ||||||
4142 | } | ||||||
4143 | |||||||
4144 | // If no results were found, try to correct typos. | ||||||
4145 | TypoCorrection Corr; | ||||||
4146 | MemInitializerValidatorCCC CCC(ClassDecl); | ||||||
4147 | if (R.empty() && BaseType.isNull() && | ||||||
4148 | (Corr = CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), S, &SS, | ||||||
4149 | CCC, CTK_ErrorRecovery, ClassDecl))) { | ||||||
4150 | if (FieldDecl *Member = Corr.getCorrectionDeclAs<FieldDecl>()) { | ||||||
4151 | // We have found a non-static data member with a similar | ||||||
4152 | // name to what was typed; complain and initialize that | ||||||
4153 | // member. | ||||||
4154 | diagnoseTypo(Corr, | ||||||
4155 | PDiag(diag::err_mem_init_not_member_or_class_suggest) | ||||||
4156 | << MemberOrBase << true); | ||||||
4157 | return BuildMemberInitializer(Member, Init, IdLoc); | ||||||
4158 | } else if (TypeDecl *Type = Corr.getCorrectionDeclAs<TypeDecl>()) { | ||||||
4159 | const CXXBaseSpecifier *DirectBaseSpec; | ||||||
4160 | const CXXBaseSpecifier *VirtualBaseSpec; | ||||||
4161 | if (FindBaseInitializer(*this, ClassDecl, | ||||||
4162 | Context.getTypeDeclType(Type), | ||||||
4163 | DirectBaseSpec, VirtualBaseSpec)) { | ||||||
4164 | // We have found a direct or virtual base class with a | ||||||
4165 | // similar name to what was typed; complain and initialize | ||||||
4166 | // that base class. | ||||||
4167 | diagnoseTypo(Corr, | ||||||
4168 | PDiag(diag::err_mem_init_not_member_or_class_suggest) | ||||||
4169 | << MemberOrBase << false, | ||||||
4170 | PDiag() /*Suppress note, we provide our own.*/); | ||||||
4171 | |||||||
4172 | const CXXBaseSpecifier *BaseSpec = DirectBaseSpec ? DirectBaseSpec | ||||||
4173 | : VirtualBaseSpec; | ||||||
4174 | Diag(BaseSpec->getBeginLoc(), diag::note_base_class_specified_here) | ||||||
4175 | << BaseSpec->getType() << BaseSpec->getSourceRange(); | ||||||
4176 | |||||||
4177 | TyD = Type; | ||||||
4178 | } | ||||||
4179 | } | ||||||
4180 | } | ||||||
4181 | |||||||
4182 | if (!TyD && BaseType.isNull()) { | ||||||
4183 | Diag(IdLoc, diag::err_mem_init_not_member_or_class) | ||||||
4184 | << MemberOrBase << SourceRange(IdLoc,Init->getSourceRange().getEnd()); | ||||||
4185 | return true; | ||||||
4186 | } | ||||||
4187 | } | ||||||
4188 | |||||||
4189 | if (BaseType.isNull()) { | ||||||
4190 | BaseType = Context.getTypeDeclType(TyD); | ||||||
4191 | MarkAnyDeclReferenced(TyD->getLocation(), TyD, /*OdrUse=*/false); | ||||||
4192 | if (SS.isSet()) { | ||||||
4193 | BaseType = Context.getElaboratedType(ETK_None, SS.getScopeRep(), | ||||||
4194 | BaseType); | ||||||
4195 | TInfo = Context.CreateTypeSourceInfo(BaseType); | ||||||
4196 | ElaboratedTypeLoc TL = TInfo->getTypeLoc().castAs<ElaboratedTypeLoc>(); | ||||||
4197 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(IdLoc); | ||||||
4198 | TL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
4199 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
4200 | } | ||||||
4201 | } | ||||||
4202 | } | ||||||
4203 | |||||||
4204 | if (!TInfo) | ||||||
4205 | TInfo = Context.getTrivialTypeSourceInfo(BaseType, IdLoc); | ||||||
4206 | |||||||
4207 | return BuildBaseInitializer(BaseType, TInfo, Init, ClassDecl, EllipsisLoc); | ||||||
4208 | } | ||||||
4209 | |||||||
4210 | MemInitResult | ||||||
4211 | Sema::BuildMemberInitializer(ValueDecl *Member, Expr *Init, | ||||||
4212 | SourceLocation IdLoc) { | ||||||
4213 | FieldDecl *DirectMember = dyn_cast<FieldDecl>(Member); | ||||||
4214 | IndirectFieldDecl *IndirectMember = dyn_cast<IndirectFieldDecl>(Member); | ||||||
4215 | assert((DirectMember || IndirectMember) &&(((DirectMember || IndirectMember) && "Member must be a FieldDecl or IndirectFieldDecl" ) ? static_cast<void> (0) : __assert_fail ("(DirectMember || IndirectMember) && \"Member must be a FieldDecl or IndirectFieldDecl\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 4216, __PRETTY_FUNCTION__)) | ||||||
4216 | "Member must be a FieldDecl or IndirectFieldDecl")(((DirectMember || IndirectMember) && "Member must be a FieldDecl or IndirectFieldDecl" ) ? static_cast<void> (0) : __assert_fail ("(DirectMember || IndirectMember) && \"Member must be a FieldDecl or IndirectFieldDecl\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 4216, __PRETTY_FUNCTION__)); | ||||||
4217 | |||||||
4218 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) | ||||||
4219 | return true; | ||||||
4220 | |||||||
4221 | if (Member->isInvalidDecl()) | ||||||
4222 | return true; | ||||||
4223 | |||||||
4224 | MultiExprArg Args; | ||||||
4225 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||||
4226 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||||
4227 | } else if (InitListExpr *InitList = dyn_cast<InitListExpr>(Init)) { | ||||||
4228 | Args = MultiExprArg(InitList->getInits(), InitList->getNumInits()); | ||||||
4229 | } else { | ||||||
4230 | // Template instantiation doesn't reconstruct ParenListExprs for us. | ||||||
4231 | Args = Init; | ||||||
4232 | } | ||||||
4233 | |||||||
4234 | SourceRange InitRange = Init->getSourceRange(); | ||||||
4235 | |||||||
4236 | if (Member->getType()->isDependentType() || Init->isTypeDependent()) { | ||||||
4237 | // Can't check initialization for a member of dependent type or when | ||||||
4238 | // any of the arguments are type-dependent expressions. | ||||||
4239 | DiscardCleanupsInEvaluationContext(); | ||||||
4240 | } else { | ||||||
4241 | bool InitList = false; | ||||||
4242 | if (isa<InitListExpr>(Init)) { | ||||||
4243 | InitList = true; | ||||||
4244 | Args = Init; | ||||||
4245 | } | ||||||
4246 | |||||||
4247 | // Initialize the member. | ||||||
4248 | InitializedEntity MemberEntity = | ||||||
4249 | DirectMember ? InitializedEntity::InitializeMember(DirectMember, nullptr) | ||||||
4250 | : InitializedEntity::InitializeMember(IndirectMember, | ||||||
4251 | nullptr); | ||||||
4252 | InitializationKind Kind = | ||||||
4253 | InitList ? InitializationKind::CreateDirectList( | ||||||
4254 | IdLoc, Init->getBeginLoc(), Init->getEndLoc()) | ||||||
4255 | : InitializationKind::CreateDirect(IdLoc, InitRange.getBegin(), | ||||||
4256 | InitRange.getEnd()); | ||||||
4257 | |||||||
4258 | InitializationSequence InitSeq(*this, MemberEntity, Kind, Args); | ||||||
4259 | ExprResult MemberInit = InitSeq.Perform(*this, MemberEntity, Kind, Args, | ||||||
4260 | nullptr); | ||||||
4261 | if (MemberInit.isInvalid()) | ||||||
4262 | return true; | ||||||
4263 | |||||||
4264 | // C++11 [class.base.init]p7: | ||||||
4265 | // The initialization of each base and member constitutes a | ||||||
4266 | // full-expression. | ||||||
4267 | MemberInit = ActOnFinishFullExpr(MemberInit.get(), InitRange.getBegin(), | ||||||
4268 | /*DiscardedValue*/ false); | ||||||
4269 | if (MemberInit.isInvalid()) | ||||||
4270 | return true; | ||||||
4271 | |||||||
4272 | Init = MemberInit.get(); | ||||||
4273 | } | ||||||
4274 | |||||||
4275 | if (DirectMember) { | ||||||
4276 | return new (Context) CXXCtorInitializer(Context, DirectMember, IdLoc, | ||||||
4277 | InitRange.getBegin(), Init, | ||||||
4278 | InitRange.getEnd()); | ||||||
4279 | } else { | ||||||
4280 | return new (Context) CXXCtorInitializer(Context, IndirectMember, IdLoc, | ||||||
4281 | InitRange.getBegin(), Init, | ||||||
4282 | InitRange.getEnd()); | ||||||
4283 | } | ||||||
4284 | } | ||||||
4285 | |||||||
4286 | MemInitResult | ||||||
4287 | Sema::BuildDelegatingInitializer(TypeSourceInfo *TInfo, Expr *Init, | ||||||
4288 | CXXRecordDecl *ClassDecl) { | ||||||
4289 | SourceLocation NameLoc = TInfo->getTypeLoc().getLocalSourceRange().getBegin(); | ||||||
4290 | if (!LangOpts.CPlusPlus11) | ||||||
4291 | return Diag(NameLoc, diag::err_delegating_ctor) | ||||||
4292 | << TInfo->getTypeLoc().getLocalSourceRange(); | ||||||
4293 | Diag(NameLoc, diag::warn_cxx98_compat_delegating_ctor); | ||||||
4294 | |||||||
4295 | bool InitList = true; | ||||||
4296 | MultiExprArg Args = Init; | ||||||
4297 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||||
4298 | InitList = false; | ||||||
4299 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||||
4300 | } | ||||||
4301 | |||||||
4302 | SourceRange InitRange = Init->getSourceRange(); | ||||||
4303 | // Initialize the object. | ||||||
4304 | InitializedEntity DelegationEntity = InitializedEntity::InitializeDelegation( | ||||||
4305 | QualType(ClassDecl->getTypeForDecl(), 0)); | ||||||
4306 | InitializationKind Kind = | ||||||
4307 | InitList ? InitializationKind::CreateDirectList( | ||||||
4308 | NameLoc, Init->getBeginLoc(), Init->getEndLoc()) | ||||||
4309 | : InitializationKind::CreateDirect(NameLoc, InitRange.getBegin(), | ||||||
4310 | InitRange.getEnd()); | ||||||
4311 | InitializationSequence InitSeq(*this, DelegationEntity, Kind, Args); | ||||||
4312 | ExprResult DelegationInit = InitSeq.Perform(*this, DelegationEntity, Kind, | ||||||
4313 | Args, nullptr); | ||||||
4314 | if (DelegationInit.isInvalid()) | ||||||
4315 | return true; | ||||||
4316 | |||||||
4317 | assert(cast<CXXConstructExpr>(DelegationInit.get())->getConstructor() &&((cast<CXXConstructExpr>(DelegationInit.get())->getConstructor () && "Delegating constructor with no target?") ? static_cast <void> (0) : __assert_fail ("cast<CXXConstructExpr>(DelegationInit.get())->getConstructor() && \"Delegating constructor with no target?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 4318, __PRETTY_FUNCTION__)) | ||||||
4318 | "Delegating constructor with no target?")((cast<CXXConstructExpr>(DelegationInit.get())->getConstructor () && "Delegating constructor with no target?") ? static_cast <void> (0) : __assert_fail ("cast<CXXConstructExpr>(DelegationInit.get())->getConstructor() && \"Delegating constructor with no target?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 4318, __PRETTY_FUNCTION__)); | ||||||
4319 | |||||||
4320 | // C++11 [class.base.init]p7: | ||||||
4321 | // The initialization of each base and member constitutes a | ||||||
4322 | // full-expression. | ||||||
4323 | DelegationInit = ActOnFinishFullExpr( | ||||||
4324 | DelegationInit.get(), InitRange.getBegin(), /*DiscardedValue*/ false); | ||||||
4325 | if (DelegationInit.isInvalid()) | ||||||
4326 | return true; | ||||||
4327 | |||||||
4328 | // If we are in a dependent context, template instantiation will | ||||||
4329 | // perform this type-checking again. Just save the arguments that we | ||||||
4330 | // received in a ParenListExpr. | ||||||
4331 | // FIXME: This isn't quite ideal, since our ASTs don't capture all | ||||||
4332 | // of the information that we have about the base | ||||||
4333 | // initializer. However, deconstructing the ASTs is a dicey process, | ||||||
4334 | // and this approach is far more likely to get the corner cases right. | ||||||
4335 | if (CurContext->isDependentContext()) | ||||||
4336 | DelegationInit = Init; | ||||||
4337 | |||||||
4338 | return new (Context) CXXCtorInitializer(Context, TInfo, InitRange.getBegin(), | ||||||
4339 | DelegationInit.getAs<Expr>(), | ||||||
4340 | InitRange.getEnd()); | ||||||
4341 | } | ||||||
4342 | |||||||
4343 | MemInitResult | ||||||
4344 | Sema::BuildBaseInitializer(QualType BaseType, TypeSourceInfo *BaseTInfo, | ||||||
4345 | Expr *Init, CXXRecordDecl *ClassDecl, | ||||||
4346 | SourceLocation EllipsisLoc) { | ||||||
4347 | SourceLocation BaseLoc | ||||||
4348 | = BaseTInfo->getTypeLoc().getLocalSourceRange().getBegin(); | ||||||
4349 | |||||||
4350 | if (!BaseType->isDependentType() && !BaseType->isRecordType()) | ||||||
4351 | return Diag(BaseLoc, diag::err_base_init_does_not_name_class) | ||||||
4352 | << BaseType << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||||
4353 | |||||||
4354 | // C++ [class.base.init]p2: | ||||||
4355 | // [...] Unless the mem-initializer-id names a nonstatic data | ||||||
4356 | // member of the constructor's class or a direct or virtual base | ||||||
4357 | // of that class, the mem-initializer is ill-formed. A | ||||||
4358 | // mem-initializer-list can initialize a base class using any | ||||||
4359 | // name that denotes that base class type. | ||||||
4360 | bool Dependent = BaseType->isDependentType() || Init->isTypeDependent(); | ||||||
4361 | |||||||
4362 | SourceRange InitRange = Init->getSourceRange(); | ||||||
4363 | if (EllipsisLoc.isValid()) { | ||||||
4364 | // This is a pack expansion. | ||||||
4365 | if (!BaseType->containsUnexpandedParameterPack()) { | ||||||
4366 | Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | ||||||
4367 | << SourceRange(BaseLoc, InitRange.getEnd()); | ||||||
4368 | |||||||
4369 | EllipsisLoc = SourceLocation(); | ||||||
4370 | } | ||||||
4371 | } else { | ||||||
4372 | // Check for any unexpanded parameter packs. | ||||||
4373 | if (DiagnoseUnexpandedParameterPack(BaseLoc, BaseTInfo, UPPC_Initializer)) | ||||||
4374 | return true; | ||||||
4375 | |||||||
4376 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) | ||||||
4377 | return true; | ||||||
4378 | } | ||||||
4379 | |||||||
4380 | // Check for direct and virtual base classes. | ||||||
4381 | const CXXBaseSpecifier *DirectBaseSpec = nullptr; | ||||||
4382 | const CXXBaseSpecifier *VirtualBaseSpec = nullptr; | ||||||
4383 | if (!Dependent) { | ||||||
4384 | if (Context.hasSameUnqualifiedType(QualType(ClassDecl->getTypeForDecl(),0), | ||||||
4385 | BaseType)) | ||||||
4386 | return BuildDelegatingInitializer(BaseTInfo, Init, ClassDecl); | ||||||
4387 | |||||||
4388 | FindBaseInitializer(*this, ClassDecl, BaseType, DirectBaseSpec, | ||||||
4389 | VirtualBaseSpec); | ||||||
4390 | |||||||
4391 | // C++ [base.class.init]p2: | ||||||
4392 | // Unless the mem-initializer-id names a nonstatic data member of the | ||||||
4393 | // constructor's class or a direct or virtual base of that class, the | ||||||
4394 | // mem-initializer is ill-formed. | ||||||
4395 | if (!DirectBaseSpec && !VirtualBaseSpec) { | ||||||
4396 | // If the class has any dependent bases, then it's possible that | ||||||
4397 | // one of those types will resolve to the same type as | ||||||
4398 | // BaseType. Therefore, just treat this as a dependent base | ||||||
4399 | // class initialization. FIXME: Should we try to check the | ||||||
4400 | // initialization anyway? It seems odd. | ||||||
4401 | if (ClassDecl->hasAnyDependentBases()) | ||||||
4402 | Dependent = true; | ||||||
4403 | else | ||||||
4404 | return Diag(BaseLoc, diag::err_not_direct_base_or_virtual) | ||||||
4405 | << BaseType << Context.getTypeDeclType(ClassDecl) | ||||||
4406 | << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||||
4407 | } | ||||||
4408 | } | ||||||
4409 | |||||||
4410 | if (Dependent) { | ||||||
4411 | DiscardCleanupsInEvaluationContext(); | ||||||
4412 | |||||||
4413 | return new (Context) CXXCtorInitializer(Context, BaseTInfo, | ||||||
4414 | /*IsVirtual=*/false, | ||||||
4415 | InitRange.getBegin(), Init, | ||||||
4416 | InitRange.getEnd(), EllipsisLoc); | ||||||
4417 | } | ||||||
4418 | |||||||
4419 | // C++ [base.class.init]p2: | ||||||
4420 | // If a mem-initializer-id is ambiguous because it designates both | ||||||
4421 | // a direct non-virtual base class and an inherited virtual base | ||||||
4422 | // class, the mem-initializer is ill-formed. | ||||||
4423 | if (DirectBaseSpec && VirtualBaseSpec) | ||||||
4424 | return Diag(BaseLoc, diag::err_base_init_direct_and_virtual) | ||||||
4425 | << BaseType << BaseTInfo->getTypeLoc().getLocalSourceRange(); | ||||||
4426 | |||||||
4427 | const CXXBaseSpecifier *BaseSpec = DirectBaseSpec; | ||||||
4428 | if (!BaseSpec) | ||||||
4429 | BaseSpec = VirtualBaseSpec; | ||||||
4430 | |||||||
4431 | // Initialize the base. | ||||||
4432 | bool InitList = true; | ||||||
4433 | MultiExprArg Args = Init; | ||||||
4434 | if (ParenListExpr *ParenList = dyn_cast<ParenListExpr>(Init)) { | ||||||
4435 | InitList = false; | ||||||
4436 | Args = MultiExprArg(ParenList->getExprs(), ParenList->getNumExprs()); | ||||||
4437 | } | ||||||
4438 | |||||||
4439 | InitializedEntity BaseEntity = | ||||||
4440 | InitializedEntity::InitializeBase(Context, BaseSpec, VirtualBaseSpec); | ||||||
4441 | InitializationKind Kind = | ||||||
4442 | InitList ? InitializationKind::CreateDirectList(BaseLoc) | ||||||
4443 | : InitializationKind::CreateDirect(BaseLoc, InitRange.getBegin(), | ||||||
4444 | InitRange.getEnd()); | ||||||
4445 | InitializationSequence InitSeq(*this, BaseEntity, Kind, Args); | ||||||
4446 | ExprResult BaseInit = InitSeq.Perform(*this, BaseEntity, Kind, Args, nullptr); | ||||||
4447 | if (BaseInit.isInvalid()) | ||||||
4448 | return true; | ||||||
4449 | |||||||
4450 | // C++11 [class.base.init]p7: | ||||||
4451 | // The initialization of each base and member constitutes a | ||||||
4452 | // full-expression. | ||||||
4453 | BaseInit = ActOnFinishFullExpr(BaseInit.get(), InitRange.getBegin(), | ||||||
4454 | /*DiscardedValue*/ false); | ||||||
4455 | if (BaseInit.isInvalid()) | ||||||
4456 | return true; | ||||||
4457 | |||||||
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 | BaseInit = Init; | ||||||
4467 | |||||||
4468 | return new (Context) CXXCtorInitializer(Context, BaseTInfo, | ||||||
4469 | BaseSpec->isVirtual(), | ||||||
4470 | InitRange.getBegin(), | ||||||
4471 | BaseInit.getAs<Expr>(), | ||||||
4472 | InitRange.getEnd(), EllipsisLoc); | ||||||
4473 | } | ||||||
4474 | |||||||
4475 | // Create a static_cast\<T&&>(expr). | ||||||
4476 | static Expr *CastForMoving(Sema &SemaRef, Expr *E, QualType T = QualType()) { | ||||||
4477 | if (T.isNull()) T = E->getType(); | ||||||
4478 | QualType TargetType = SemaRef.BuildReferenceType( | ||||||
4479 | T, /*SpelledAsLValue*/false, SourceLocation(), DeclarationName()); | ||||||
4480 | SourceLocation ExprLoc = E->getBeginLoc(); | ||||||
4481 | TypeSourceInfo *TargetLoc = SemaRef.Context.getTrivialTypeSourceInfo( | ||||||
4482 | TargetType, ExprLoc); | ||||||
4483 | |||||||
4484 | return SemaRef.BuildCXXNamedCast(ExprLoc, tok::kw_static_cast, TargetLoc, E, | ||||||
4485 | SourceRange(ExprLoc, ExprLoc), | ||||||
4486 | E->getSourceRange()).get(); | ||||||
4487 | } | ||||||
4488 | |||||||
4489 | /// ImplicitInitializerKind - How an implicit base or member initializer should | ||||||
4490 | /// initialize its base or member. | ||||||
4491 | enum ImplicitInitializerKind { | ||||||
4492 | IIK_Default, | ||||||
4493 | IIK_Copy, | ||||||
4494 | IIK_Move, | ||||||
4495 | IIK_Inherit | ||||||
4496 | }; | ||||||
4497 | |||||||
4498 | static bool | ||||||
4499 | BuildImplicitBaseInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor, | ||||||
4500 | ImplicitInitializerKind ImplicitInitKind, | ||||||
4501 | CXXBaseSpecifier *BaseSpec, | ||||||
4502 | bool IsInheritedVirtualBase, | ||||||
4503 | CXXCtorInitializer *&CXXBaseInit) { | ||||||
4504 | InitializedEntity InitEntity | ||||||
4505 | = InitializedEntity::InitializeBase(SemaRef.Context, BaseSpec, | ||||||
4506 | IsInheritedVirtualBase); | ||||||
4507 | |||||||
4508 | ExprResult BaseInit; | ||||||
4509 | |||||||
4510 | switch (ImplicitInitKind) { | ||||||
4511 | case IIK_Inherit: | ||||||
4512 | case IIK_Default: { | ||||||
4513 | InitializationKind InitKind | ||||||
4514 | = InitializationKind::CreateDefault(Constructor->getLocation()); | ||||||
4515 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, None); | ||||||
4516 | BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, None); | ||||||
4517 | break; | ||||||
4518 | } | ||||||
4519 | |||||||
4520 | case IIK_Move: | ||||||
4521 | case IIK_Copy: { | ||||||
4522 | bool Moving = ImplicitInitKind == IIK_Move; | ||||||
4523 | ParmVarDecl *Param = Constructor->getParamDecl(0); | ||||||
4524 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||||
4525 | |||||||
4526 | Expr *CopyCtorArg = | ||||||
4527 | DeclRefExpr::Create(SemaRef.Context, NestedNameSpecifierLoc(), | ||||||
4528 | SourceLocation(), Param, false, | ||||||
4529 | Constructor->getLocation(), ParamType, | ||||||
4530 | VK_LValue, nullptr); | ||||||
4531 | |||||||
4532 | SemaRef.MarkDeclRefReferenced(cast<DeclRefExpr>(CopyCtorArg)); | ||||||
4533 | |||||||
4534 | // Cast to the base class to avoid ambiguities. | ||||||
4535 | QualType ArgTy = | ||||||
4536 | SemaRef.Context.getQualifiedType(BaseSpec->getType().getUnqualifiedType(), | ||||||
4537 | ParamType.getQualifiers()); | ||||||
4538 | |||||||
4539 | if (Moving) { | ||||||
4540 | CopyCtorArg = CastForMoving(SemaRef, CopyCtorArg); | ||||||
4541 | } | ||||||
4542 | |||||||
4543 | CXXCastPath BasePath; | ||||||
4544 | BasePath.push_back(BaseSpec); | ||||||
4545 | CopyCtorArg = SemaRef.ImpCastExprToType(CopyCtorArg, ArgTy, | ||||||
4546 | CK_UncheckedDerivedToBase, | ||||||
4547 | Moving ? VK_XValue : VK_LValue, | ||||||
4548 | &BasePath).get(); | ||||||
4549 | |||||||
4550 | InitializationKind InitKind | ||||||
4551 | = InitializationKind::CreateDirect(Constructor->getLocation(), | ||||||
4552 | SourceLocation(), SourceLocation()); | ||||||
4553 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, CopyCtorArg); | ||||||
4554 | BaseInit = InitSeq.Perform(SemaRef, InitEntity, InitKind, CopyCtorArg); | ||||||
4555 | break; | ||||||
4556 | } | ||||||
4557 | } | ||||||
4558 | |||||||
4559 | BaseInit = SemaRef.MaybeCreateExprWithCleanups(BaseInit); | ||||||
4560 | if (BaseInit.isInvalid()) | ||||||
4561 | return true; | ||||||
4562 | |||||||
4563 | CXXBaseInit = | ||||||
4564 | new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||||
4565 | SemaRef.Context.getTrivialTypeSourceInfo(BaseSpec->getType(), | ||||||
4566 | SourceLocation()), | ||||||
4567 | BaseSpec->isVirtual(), | ||||||
4568 | SourceLocation(), | ||||||
4569 | BaseInit.getAs<Expr>(), | ||||||
4570 | SourceLocation(), | ||||||
4571 | SourceLocation()); | ||||||
4572 | |||||||
4573 | return false; | ||||||
4574 | } | ||||||
4575 | |||||||
4576 | static bool RefersToRValueRef(Expr *MemRef) { | ||||||
4577 | ValueDecl *Referenced = cast<MemberExpr>(MemRef)->getMemberDecl(); | ||||||
4578 | return Referenced->getType()->isRValueReferenceType(); | ||||||
4579 | } | ||||||
4580 | |||||||
4581 | static bool | ||||||
4582 | BuildImplicitMemberInitializer(Sema &SemaRef, CXXConstructorDecl *Constructor, | ||||||
4583 | ImplicitInitializerKind ImplicitInitKind, | ||||||
4584 | FieldDecl *Field, IndirectFieldDecl *Indirect, | ||||||
4585 | CXXCtorInitializer *&CXXMemberInit) { | ||||||
4586 | if (Field->isInvalidDecl()) | ||||||
4587 | return true; | ||||||
4588 | |||||||
4589 | SourceLocation Loc = Constructor->getLocation(); | ||||||
4590 | |||||||
4591 | if (ImplicitInitKind == IIK_Copy || ImplicitInitKind == IIK_Move) { | ||||||
4592 | bool Moving = ImplicitInitKind == IIK_Move; | ||||||
4593 | ParmVarDecl *Param = Constructor->getParamDecl(0); | ||||||
4594 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||||
4595 | |||||||
4596 | // Suppress copying zero-width bitfields. | ||||||
4597 | if (Field->isZeroLengthBitField(SemaRef.Context)) | ||||||
4598 | return false; | ||||||
4599 | |||||||
4600 | Expr *MemberExprBase = | ||||||
4601 | DeclRefExpr::Create(SemaRef.Context, NestedNameSpecifierLoc(), | ||||||
4602 | SourceLocation(), Param, false, | ||||||
4603 | Loc, ParamType, VK_LValue, nullptr); | ||||||
4604 | |||||||
4605 | SemaRef.MarkDeclRefReferenced(cast<DeclRefExpr>(MemberExprBase)); | ||||||
4606 | |||||||
4607 | if (Moving) { | ||||||
4608 | MemberExprBase = CastForMoving(SemaRef, MemberExprBase); | ||||||
4609 | } | ||||||
4610 | |||||||
4611 | // Build a reference to this field within the parameter. | ||||||
4612 | CXXScopeSpec SS; | ||||||
4613 | LookupResult MemberLookup(SemaRef, Field->getDeclName(), Loc, | ||||||
4614 | Sema::LookupMemberName); | ||||||
4615 | MemberLookup.addDecl(Indirect ? cast<ValueDecl>(Indirect) | ||||||
4616 | : cast<ValueDecl>(Field), AS_public); | ||||||
4617 | MemberLookup.resolveKind(); | ||||||
4618 | ExprResult CtorArg | ||||||
4619 | = SemaRef.BuildMemberReferenceExpr(MemberExprBase, | ||||||
4620 | ParamType, Loc, | ||||||
4621 | /*IsArrow=*/false, | ||||||
4622 | SS, | ||||||
4623 | /*TemplateKWLoc=*/SourceLocation(), | ||||||
4624 | /*FirstQualifierInScope=*/nullptr, | ||||||
4625 | MemberLookup, | ||||||
4626 | /*TemplateArgs=*/nullptr, | ||||||
4627 | /*S*/nullptr); | ||||||
4628 | if (CtorArg.isInvalid()) | ||||||
4629 | return true; | ||||||
4630 | |||||||
4631 | // C++11 [class.copy]p15: | ||||||
4632 | // - if a member m has rvalue reference type T&&, it is direct-initialized | ||||||
4633 | // with static_cast<T&&>(x.m); | ||||||
4634 | if (RefersToRValueRef(CtorArg.get())) { | ||||||
4635 | CtorArg = CastForMoving(SemaRef, CtorArg.get()); | ||||||
4636 | } | ||||||
4637 | |||||||
4638 | InitializedEntity Entity = | ||||||
4639 | Indirect ? InitializedEntity::InitializeMember(Indirect, nullptr, | ||||||
4640 | /*Implicit*/ true) | ||||||
4641 | : InitializedEntity::InitializeMember(Field, nullptr, | ||||||
4642 | /*Implicit*/ true); | ||||||
4643 | |||||||
4644 | // Direct-initialize to use the copy constructor. | ||||||
4645 | InitializationKind InitKind = | ||||||
4646 | InitializationKind::CreateDirect(Loc, SourceLocation(), SourceLocation()); | ||||||
4647 | |||||||
4648 | Expr *CtorArgE = CtorArg.getAs<Expr>(); | ||||||
4649 | InitializationSequence InitSeq(SemaRef, Entity, InitKind, CtorArgE); | ||||||
4650 | ExprResult MemberInit = | ||||||
4651 | InitSeq.Perform(SemaRef, Entity, InitKind, MultiExprArg(&CtorArgE, 1)); | ||||||
4652 | MemberInit = SemaRef.MaybeCreateExprWithCleanups(MemberInit); | ||||||
4653 | if (MemberInit.isInvalid()) | ||||||
4654 | return true; | ||||||
4655 | |||||||
4656 | if (Indirect) | ||||||
4657 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer( | ||||||
4658 | SemaRef.Context, Indirect, Loc, Loc, MemberInit.getAs<Expr>(), Loc); | ||||||
4659 | else | ||||||
4660 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer( | ||||||
4661 | SemaRef.Context, Field, Loc, Loc, MemberInit.getAs<Expr>(), Loc); | ||||||
4662 | return false; | ||||||
4663 | } | ||||||
4664 | |||||||
4665 | assert((ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) &&(((ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit ) && "Unhandled implicit init kind!") ? static_cast< void> (0) : __assert_fail ("(ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) && \"Unhandled implicit init kind!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 4666, __PRETTY_FUNCTION__)) | ||||||
4666 | "Unhandled implicit init kind!")(((ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit ) && "Unhandled implicit init kind!") ? static_cast< void> (0) : __assert_fail ("(ImplicitInitKind == IIK_Default || ImplicitInitKind == IIK_Inherit) && \"Unhandled implicit init kind!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 4666, __PRETTY_FUNCTION__)); | ||||||
4667 | |||||||
4668 | QualType FieldBaseElementType = | ||||||
4669 | SemaRef.Context.getBaseElementType(Field->getType()); | ||||||
4670 | |||||||
4671 | if (FieldBaseElementType->isRecordType()) { | ||||||
4672 | InitializedEntity InitEntity = | ||||||
4673 | Indirect ? InitializedEntity::InitializeMember(Indirect, nullptr, | ||||||
4674 | /*Implicit*/ true) | ||||||
4675 | : InitializedEntity::InitializeMember(Field, nullptr, | ||||||
4676 | /*Implicit*/ true); | ||||||
4677 | InitializationKind InitKind = | ||||||
4678 | InitializationKind::CreateDefault(Loc); | ||||||
4679 | |||||||
4680 | InitializationSequence InitSeq(SemaRef, InitEntity, InitKind, None); | ||||||
4681 | ExprResult MemberInit = | ||||||
4682 | InitSeq.Perform(SemaRef, InitEntity, InitKind, None); | ||||||
4683 | |||||||
4684 | MemberInit = SemaRef.MaybeCreateExprWithCleanups(MemberInit); | ||||||
4685 | if (MemberInit.isInvalid()) | ||||||
4686 | return true; | ||||||
4687 | |||||||
4688 | if (Indirect) | ||||||
4689 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||||
4690 | Indirect, Loc, | ||||||
4691 | Loc, | ||||||
4692 | MemberInit.get(), | ||||||
4693 | Loc); | ||||||
4694 | else | ||||||
4695 | CXXMemberInit = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, | ||||||
4696 | Field, Loc, Loc, | ||||||
4697 | MemberInit.get(), | ||||||
4698 | Loc); | ||||||
4699 | return false; | ||||||
4700 | } | ||||||
4701 | |||||||
4702 | if (!Field->getParent()->isUnion()) { | ||||||
4703 | if (FieldBaseElementType->isReferenceType()) { | ||||||
4704 | SemaRef.Diag(Constructor->getLocation(), | ||||||
4705 | diag::err_uninitialized_member_in_ctor) | ||||||
4706 | << (int)Constructor->isImplicit() | ||||||
4707 | << SemaRef.Context.getTagDeclType(Constructor->getParent()) | ||||||
4708 | << 0 << Field->getDeclName(); | ||||||
4709 | SemaRef.Diag(Field->getLocation(), diag::note_declared_at); | ||||||
4710 | return true; | ||||||
4711 | } | ||||||
4712 | |||||||
4713 | if (FieldBaseElementType.isConstQualified()) { | ||||||
4714 | SemaRef.Diag(Constructor->getLocation(), | ||||||
4715 | diag::err_uninitialized_member_in_ctor) | ||||||
4716 | << (int)Constructor->isImplicit() | ||||||
4717 | << SemaRef.Context.getTagDeclType(Constructor->getParent()) | ||||||
4718 | << 1 << Field->getDeclName(); | ||||||
4719 | SemaRef.Diag(Field->getLocation(), diag::note_declared_at); | ||||||
4720 | return true; | ||||||
4721 | } | ||||||
4722 | } | ||||||
4723 | |||||||
4724 | if (FieldBaseElementType.hasNonTrivialObjCLifetime()) { | ||||||
4725 | // ARC and Weak: | ||||||
4726 | // Default-initialize Objective-C pointers to NULL. | ||||||
4727 | CXXMemberInit | ||||||
4728 | = new (SemaRef.Context) CXXCtorInitializer(SemaRef.Context, Field, | ||||||
4729 | Loc, Loc, | ||||||
4730 | new (SemaRef.Context) ImplicitValueInitExpr(Field->getType()), | ||||||
4731 | Loc); | ||||||
4732 | return false; | ||||||
4733 | } | ||||||
4734 | |||||||
4735 | // Nothing to initialize. | ||||||
4736 | CXXMemberInit = nullptr; | ||||||
4737 | return false; | ||||||
4738 | } | ||||||
4739 | |||||||
4740 | namespace { | ||||||
4741 | struct BaseAndFieldInfo { | ||||||
4742 | Sema &S; | ||||||
4743 | CXXConstructorDecl *Ctor; | ||||||
4744 | bool AnyErrorsInInits; | ||||||
4745 | ImplicitInitializerKind IIK; | ||||||
4746 | llvm::DenseMap<const void *, CXXCtorInitializer*> AllBaseFields; | ||||||
4747 | SmallVector<CXXCtorInitializer*, 8> AllToInit; | ||||||
4748 | llvm::DenseMap<TagDecl*, FieldDecl*> ActiveUnionMember; | ||||||
4749 | |||||||
4750 | BaseAndFieldInfo(Sema &S, CXXConstructorDecl *Ctor, bool ErrorsInInits) | ||||||
4751 | : S(S), Ctor(Ctor), AnyErrorsInInits(ErrorsInInits) { | ||||||
4752 | bool Generated = Ctor->isImplicit() || Ctor->isDefaulted(); | ||||||
4753 | if (Ctor->getInheritedConstructor()) | ||||||
4754 | IIK = IIK_Inherit; | ||||||
4755 | else if (Generated && Ctor->isCopyConstructor()) | ||||||
4756 | IIK = IIK_Copy; | ||||||
4757 | else if (Generated && Ctor->isMoveConstructor()) | ||||||
4758 | IIK = IIK_Move; | ||||||
4759 | else | ||||||
4760 | IIK = IIK_Default; | ||||||
4761 | } | ||||||
4762 | |||||||
4763 | bool isImplicitCopyOrMove() const { | ||||||
4764 | switch (IIK) { | ||||||
4765 | case IIK_Copy: | ||||||
4766 | case IIK_Move: | ||||||
4767 | return true; | ||||||
4768 | |||||||
4769 | case IIK_Default: | ||||||
4770 | case IIK_Inherit: | ||||||
4771 | return false; | ||||||
4772 | } | ||||||
4773 | |||||||
4774 | llvm_unreachable("Invalid ImplicitInitializerKind!")::llvm::llvm_unreachable_internal("Invalid ImplicitInitializerKind!" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 4774); | ||||||
4775 | } | ||||||
4776 | |||||||
4777 | bool addFieldInitializer(CXXCtorInitializer *Init) { | ||||||
4778 | AllToInit.push_back(Init); | ||||||
4779 | |||||||
4780 | // Check whether this initializer makes the field "used". | ||||||
4781 | if (Init->getInit()->HasSideEffects(S.Context)) | ||||||
4782 | S.UnusedPrivateFields.remove(Init->getAnyMember()); | ||||||
4783 | |||||||
4784 | return false; | ||||||
4785 | } | ||||||
4786 | |||||||
4787 | bool isInactiveUnionMember(FieldDecl *Field) { | ||||||
4788 | RecordDecl *Record = Field->getParent(); | ||||||
4789 | if (!Record->isUnion()) | ||||||
4790 | return false; | ||||||
4791 | |||||||
4792 | if (FieldDecl *Active = | ||||||
4793 | ActiveUnionMember.lookup(Record->getCanonicalDecl())) | ||||||
4794 | return Active != Field->getCanonicalDecl(); | ||||||
4795 | |||||||
4796 | // In an implicit copy or move constructor, ignore any in-class initializer. | ||||||
4797 | if (isImplicitCopyOrMove()) | ||||||
4798 | return true; | ||||||
4799 | |||||||
4800 | // If there's no explicit initialization, the field is active only if it | ||||||
4801 | // has an in-class initializer... | ||||||
4802 | if (Field->hasInClassInitializer()) | ||||||
4803 | return false; | ||||||
4804 | // ... or it's an anonymous struct or union whose class has an in-class | ||||||
4805 | // initializer. | ||||||
4806 | if (!Field->isAnonymousStructOrUnion()) | ||||||
4807 | return true; | ||||||
4808 | CXXRecordDecl *FieldRD = Field->getType()->getAsCXXRecordDecl(); | ||||||
4809 | return !FieldRD->hasInClassInitializer(); | ||||||
4810 | } | ||||||
4811 | |||||||
4812 | /// Determine whether the given field is, or is within, a union member | ||||||
4813 | /// that is inactive (because there was an initializer given for a different | ||||||
4814 | /// member of the union, or because the union was not initialized at all). | ||||||
4815 | bool isWithinInactiveUnionMember(FieldDecl *Field, | ||||||
4816 | IndirectFieldDecl *Indirect) { | ||||||
4817 | if (!Indirect) | ||||||
4818 | return isInactiveUnionMember(Field); | ||||||
4819 | |||||||
4820 | for (auto *C : Indirect->chain()) { | ||||||
4821 | FieldDecl *Field = dyn_cast<FieldDecl>(C); | ||||||
4822 | if (Field && isInactiveUnionMember(Field)) | ||||||
4823 | return true; | ||||||
4824 | } | ||||||
4825 | return false; | ||||||
4826 | } | ||||||
4827 | }; | ||||||
4828 | } | ||||||
4829 | |||||||
4830 | /// Determine whether the given type is an incomplete or zero-lenfgth | ||||||
4831 | /// array type. | ||||||
4832 | static bool isIncompleteOrZeroLengthArrayType(ASTContext &Context, QualType T) { | ||||||
4833 | if (T->isIncompleteArrayType()) | ||||||
4834 | return true; | ||||||
4835 | |||||||
4836 | while (const ConstantArrayType *ArrayT = Context.getAsConstantArrayType(T)) { | ||||||
4837 | if (!ArrayT->getSize()) | ||||||
4838 | return true; | ||||||
4839 | |||||||
4840 | T = ArrayT->getElementType(); | ||||||
4841 | } | ||||||
4842 | |||||||
4843 | return false; | ||||||
4844 | } | ||||||
4845 | |||||||
4846 | static bool CollectFieldInitializer(Sema &SemaRef, BaseAndFieldInfo &Info, | ||||||
4847 | FieldDecl *Field, | ||||||
4848 | IndirectFieldDecl *Indirect = nullptr) { | ||||||
4849 | if (Field->isInvalidDecl()) | ||||||
4850 | return false; | ||||||
4851 | |||||||
4852 | // Overwhelmingly common case: we have a direct initializer for this field. | ||||||
4853 | if (CXXCtorInitializer *Init = | ||||||
4854 | Info.AllBaseFields.lookup(Field->getCanonicalDecl())) | ||||||
4855 | return Info.addFieldInitializer(Init); | ||||||
4856 | |||||||
4857 | // C++11 [class.base.init]p8: | ||||||
4858 | // if the entity is a non-static data member that has a | ||||||
4859 | // brace-or-equal-initializer and either | ||||||
4860 | // -- the constructor's class is a union and no other variant member of that | ||||||
4861 | // union is designated by a mem-initializer-id or | ||||||
4862 | // -- the constructor's class is not a union, and, if the entity is a member | ||||||
4863 | // of an anonymous union, no other member of that union is designated by | ||||||
4864 | // a mem-initializer-id, | ||||||
4865 | // the entity is initialized as specified in [dcl.init]. | ||||||
4866 | // | ||||||
4867 | // We also apply the same rules to handle anonymous structs within anonymous | ||||||
4868 | // unions. | ||||||
4869 | if (Info.isWithinInactiveUnionMember(Field, Indirect)) | ||||||
4870 | return false; | ||||||
4871 | |||||||
4872 | if (Field->hasInClassInitializer() && !Info.isImplicitCopyOrMove()) { | ||||||
4873 | ExprResult DIE = | ||||||
4874 | SemaRef.BuildCXXDefaultInitExpr(Info.Ctor->getLocation(), Field); | ||||||
4875 | if (DIE.isInvalid()) | ||||||
4876 | return true; | ||||||
4877 | |||||||
4878 | auto Entity = InitializedEntity::InitializeMember(Field, nullptr, true); | ||||||
4879 | SemaRef.checkInitializerLifetime(Entity, DIE.get()); | ||||||
4880 | |||||||
4881 | CXXCtorInitializer *Init; | ||||||
4882 | if (Indirect) | ||||||
4883 | Init = new (SemaRef.Context) | ||||||
4884 | CXXCtorInitializer(SemaRef.Context, Indirect, SourceLocation(), | ||||||
4885 | SourceLocation(), DIE.get(), SourceLocation()); | ||||||
4886 | else | ||||||
4887 | Init = new (SemaRef.Context) | ||||||
4888 | CXXCtorInitializer(SemaRef.Context, Field, SourceLocation(), | ||||||
4889 | SourceLocation(), DIE.get(), SourceLocation()); | ||||||
4890 | return Info.addFieldInitializer(Init); | ||||||
4891 | } | ||||||
4892 | |||||||
4893 | // Don't initialize incomplete or zero-length arrays. | ||||||
4894 | if (isIncompleteOrZeroLengthArrayType(SemaRef.Context, Field->getType())) | ||||||
4895 | return false; | ||||||
4896 | |||||||
4897 | // Don't try to build an implicit initializer if there were semantic | ||||||
4898 | // errors in any of the initializers (and therefore we might be | ||||||
4899 | // missing some that the user actually wrote). | ||||||
4900 | if (Info.AnyErrorsInInits) | ||||||
4901 | return false; | ||||||
4902 | |||||||
4903 | CXXCtorInitializer *Init = nullptr; | ||||||
4904 | if (BuildImplicitMemberInitializer(Info.S, Info.Ctor, Info.IIK, Field, | ||||||
4905 | Indirect, Init)) | ||||||
4906 | return true; | ||||||
4907 | |||||||
4908 | if (!Init) | ||||||
4909 | return false; | ||||||
4910 | |||||||
4911 | return Info.addFieldInitializer(Init); | ||||||
4912 | } | ||||||
4913 | |||||||
4914 | bool | ||||||
4915 | Sema::SetDelegatingInitializer(CXXConstructorDecl *Constructor, | ||||||
4916 | CXXCtorInitializer *Initializer) { | ||||||
4917 | assert(Initializer->isDelegatingInitializer())((Initializer->isDelegatingInitializer()) ? static_cast< void> (0) : __assert_fail ("Initializer->isDelegatingInitializer()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 4917, __PRETTY_FUNCTION__)); | ||||||
4918 | Constructor->setNumCtorInitializers(1); | ||||||
4919 | CXXCtorInitializer **initializer = | ||||||
4920 | new (Context) CXXCtorInitializer*[1]; | ||||||
4921 | memcpy(initializer, &Initializer, sizeof (CXXCtorInitializer*)); | ||||||
4922 | Constructor->setCtorInitializers(initializer); | ||||||
4923 | |||||||
4924 | if (CXXDestructorDecl *Dtor = LookupDestructor(Constructor->getParent())) { | ||||||
4925 | MarkFunctionReferenced(Initializer->getSourceLocation(), Dtor); | ||||||
4926 | DiagnoseUseOfDecl(Dtor, Initializer->getSourceLocation()); | ||||||
4927 | } | ||||||
4928 | |||||||
4929 | DelegatingCtorDecls.push_back(Constructor); | ||||||
4930 | |||||||
4931 | DiagnoseUninitializedFields(*this, Constructor); | ||||||
4932 | |||||||
4933 | return false; | ||||||
4934 | } | ||||||
4935 | |||||||
4936 | bool Sema::SetCtorInitializers(CXXConstructorDecl *Constructor, bool AnyErrors, | ||||||
4937 | ArrayRef<CXXCtorInitializer *> Initializers) { | ||||||
4938 | if (Constructor->isDependentContext()) { | ||||||
4939 | // Just store the initializers as written, they will be checked during | ||||||
4940 | // instantiation. | ||||||
4941 | if (!Initializers.empty()) { | ||||||
4942 | Constructor->setNumCtorInitializers(Initializers.size()); | ||||||
4943 | CXXCtorInitializer **baseOrMemberInitializers = | ||||||
4944 | new (Context) CXXCtorInitializer*[Initializers.size()]; | ||||||
4945 | memcpy(baseOrMemberInitializers, Initializers.data(), | ||||||
4946 | Initializers.size() * sizeof(CXXCtorInitializer*)); | ||||||
4947 | Constructor->setCtorInitializers(baseOrMemberInitializers); | ||||||
4948 | } | ||||||
4949 | |||||||
4950 | // Let template instantiation know whether we had errors. | ||||||
4951 | if (AnyErrors) | ||||||
4952 | Constructor->setInvalidDecl(); | ||||||
4953 | |||||||
4954 | return false; | ||||||
4955 | } | ||||||
4956 | |||||||
4957 | BaseAndFieldInfo Info(*this, Constructor, AnyErrors); | ||||||
4958 | |||||||
4959 | // We need to build the initializer AST according to order of construction | ||||||
4960 | // and not what user specified in the Initializers list. | ||||||
4961 | CXXRecordDecl *ClassDecl = Constructor->getParent()->getDefinition(); | ||||||
4962 | if (!ClassDecl) | ||||||
4963 | return true; | ||||||
4964 | |||||||
4965 | bool HadError = false; | ||||||
4966 | |||||||
4967 | for (unsigned i = 0; i < Initializers.size(); i++) { | ||||||
4968 | CXXCtorInitializer *Member = Initializers[i]; | ||||||
4969 | |||||||
4970 | if (Member->isBaseInitializer()) | ||||||
4971 | Info.AllBaseFields[Member->getBaseClass()->getAs<RecordType>()] = Member; | ||||||
4972 | else { | ||||||
4973 | Info.AllBaseFields[Member->getAnyMember()->getCanonicalDecl()] = Member; | ||||||
4974 | |||||||
4975 | if (IndirectFieldDecl *F = Member->getIndirectMember()) { | ||||||
4976 | for (auto *C : F->chain()) { | ||||||
4977 | FieldDecl *FD = dyn_cast<FieldDecl>(C); | ||||||
4978 | if (FD && FD->getParent()->isUnion()) | ||||||
4979 | Info.ActiveUnionMember.insert(std::make_pair( | ||||||
4980 | FD->getParent()->getCanonicalDecl(), FD->getCanonicalDecl())); | ||||||
4981 | } | ||||||
4982 | } else if (FieldDecl *FD = Member->getMember()) { | ||||||
4983 | if (FD->getParent()->isUnion()) | ||||||
4984 | Info.ActiveUnionMember.insert(std::make_pair( | ||||||
4985 | FD->getParent()->getCanonicalDecl(), FD->getCanonicalDecl())); | ||||||
4986 | } | ||||||
4987 | } | ||||||
4988 | } | ||||||
4989 | |||||||
4990 | // Keep track of the direct virtual bases. | ||||||
4991 | llvm::SmallPtrSet<CXXBaseSpecifier *, 16> DirectVBases; | ||||||
4992 | for (auto &I : ClassDecl->bases()) { | ||||||
4993 | if (I.isVirtual()) | ||||||
4994 | DirectVBases.insert(&I); | ||||||
4995 | } | ||||||
4996 | |||||||
4997 | // Push virtual bases before others. | ||||||
4998 | for (auto &VBase : ClassDecl->vbases()) { | ||||||
4999 | if (CXXCtorInitializer *Value | ||||||
5000 | = Info.AllBaseFields.lookup(VBase.getType()->getAs<RecordType>())) { | ||||||
5001 | // [class.base.init]p7, per DR257: | ||||||
5002 | // A mem-initializer where the mem-initializer-id names a virtual base | ||||||
5003 | // class is ignored during execution of a constructor of any class that | ||||||
5004 | // is not the most derived class. | ||||||
5005 | if (ClassDecl->isAbstract()) { | ||||||
5006 | // FIXME: Provide a fixit to remove the base specifier. This requires | ||||||
5007 | // tracking the location of the associated comma for a base specifier. | ||||||
5008 | Diag(Value->getSourceLocation(), diag::warn_abstract_vbase_init_ignored) | ||||||
5009 | << VBase.getType() << ClassDecl; | ||||||
5010 | DiagnoseAbstractType(ClassDecl); | ||||||
5011 | } | ||||||
5012 | |||||||
5013 | Info.AllToInit.push_back(Value); | ||||||
5014 | } else if (!AnyErrors && !ClassDecl->isAbstract()) { | ||||||
5015 | // [class.base.init]p8, per DR257: | ||||||
5016 | // If a given [...] base class is not named by a mem-initializer-id | ||||||
5017 | // [...] and the entity is not a virtual base class of an abstract | ||||||
5018 | // class, then [...] the entity is default-initialized. | ||||||
5019 | bool IsInheritedVirtualBase = !DirectVBases.count(&VBase); | ||||||
5020 | CXXCtorInitializer *CXXBaseInit; | ||||||
5021 | if (BuildImplicitBaseInitializer(*this, Constructor, Info.IIK, | ||||||
5022 | &VBase, IsInheritedVirtualBase, | ||||||
5023 | CXXBaseInit)) { | ||||||
5024 | HadError = true; | ||||||
5025 | continue; | ||||||
5026 | } | ||||||
5027 | |||||||
5028 | Info.AllToInit.push_back(CXXBaseInit); | ||||||
5029 | } | ||||||
5030 | } | ||||||
5031 | |||||||
5032 | // Non-virtual bases. | ||||||
5033 | for (auto &Base : ClassDecl->bases()) { | ||||||
5034 | // Virtuals are in the virtual base list and already constructed. | ||||||
5035 | if (Base.isVirtual()) | ||||||
5036 | continue; | ||||||
5037 | |||||||
5038 | if (CXXCtorInitializer *Value | ||||||
5039 | = Info.AllBaseFields.lookup(Base.getType()->getAs<RecordType>())) { | ||||||
5040 | Info.AllToInit.push_back(Value); | ||||||
5041 | } else if (!AnyErrors) { | ||||||
5042 | CXXCtorInitializer *CXXBaseInit; | ||||||
5043 | if (BuildImplicitBaseInitializer(*this, Constructor, Info.IIK, | ||||||
5044 | &Base, /*IsInheritedVirtualBase=*/false, | ||||||
5045 | CXXBaseInit)) { | ||||||
5046 | HadError = true; | ||||||
5047 | continue; | ||||||
5048 | } | ||||||
5049 | |||||||
5050 | Info.AllToInit.push_back(CXXBaseInit); | ||||||
5051 | } | ||||||
5052 | } | ||||||
5053 | |||||||
5054 | // Fields. | ||||||
5055 | for (auto *Mem : ClassDecl->decls()) { | ||||||
5056 | if (auto *F = dyn_cast<FieldDecl>(Mem)) { | ||||||
5057 | // C++ [class.bit]p2: | ||||||
5058 | // A declaration for a bit-field that omits the identifier declares an | ||||||
5059 | // unnamed bit-field. Unnamed bit-fields are not members and cannot be | ||||||
5060 | // initialized. | ||||||
5061 | if (F->isUnnamedBitfield()) | ||||||
5062 | continue; | ||||||
5063 | |||||||
5064 | // If we're not generating the implicit copy/move constructor, then we'll | ||||||
5065 | // handle anonymous struct/union fields based on their individual | ||||||
5066 | // indirect fields. | ||||||
5067 | if (F->isAnonymousStructOrUnion() && !Info.isImplicitCopyOrMove()) | ||||||
5068 | continue; | ||||||
5069 | |||||||
5070 | if (CollectFieldInitializer(*this, Info, F)) | ||||||
5071 | HadError = true; | ||||||
5072 | continue; | ||||||
5073 | } | ||||||
5074 | |||||||
5075 | // Beyond this point, we only consider default initialization. | ||||||
5076 | if (Info.isImplicitCopyOrMove()) | ||||||
5077 | continue; | ||||||
5078 | |||||||
5079 | if (auto *F = dyn_cast<IndirectFieldDecl>(Mem)) { | ||||||
5080 | if (F->getType()->isIncompleteArrayType()) { | ||||||
5081 | assert(ClassDecl->hasFlexibleArrayMember() &&((ClassDecl->hasFlexibleArrayMember() && "Incomplete array type is not valid" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5082, __PRETTY_FUNCTION__)) | ||||||
5082 | "Incomplete array type is not valid")((ClassDecl->hasFlexibleArrayMember() && "Incomplete array type is not valid" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5082, __PRETTY_FUNCTION__)); | ||||||
5083 | continue; | ||||||
5084 | } | ||||||
5085 | |||||||
5086 | // Initialize each field of an anonymous struct individually. | ||||||
5087 | if (CollectFieldInitializer(*this, Info, F->getAnonField(), F)) | ||||||
5088 | HadError = true; | ||||||
5089 | |||||||
5090 | continue; | ||||||
5091 | } | ||||||
5092 | } | ||||||
5093 | |||||||
5094 | unsigned NumInitializers = Info.AllToInit.size(); | ||||||
5095 | if (NumInitializers > 0) { | ||||||
5096 | Constructor->setNumCtorInitializers(NumInitializers); | ||||||
5097 | CXXCtorInitializer **baseOrMemberInitializers = | ||||||
5098 | new (Context) CXXCtorInitializer*[NumInitializers]; | ||||||
5099 | memcpy(baseOrMemberInitializers, Info.AllToInit.data(), | ||||||
5100 | NumInitializers * sizeof(CXXCtorInitializer*)); | ||||||
5101 | Constructor->setCtorInitializers(baseOrMemberInitializers); | ||||||
5102 | |||||||
5103 | // Constructors implicitly reference the base and member | ||||||
5104 | // destructors. | ||||||
5105 | MarkBaseAndMemberDestructorsReferenced(Constructor->getLocation(), | ||||||
5106 | Constructor->getParent()); | ||||||
5107 | } | ||||||
5108 | |||||||
5109 | return HadError; | ||||||
5110 | } | ||||||
5111 | |||||||
5112 | static void PopulateKeysForFields(FieldDecl *Field, SmallVectorImpl<const void*> &IdealInits) { | ||||||
5113 | if (const RecordType *RT = Field->getType()->getAs<RecordType>()) { | ||||||
5114 | const RecordDecl *RD = RT->getDecl(); | ||||||
5115 | if (RD->isAnonymousStructOrUnion()) { | ||||||
5116 | for (auto *Field : RD->fields()) | ||||||
5117 | PopulateKeysForFields(Field, IdealInits); | ||||||
5118 | return; | ||||||
5119 | } | ||||||
5120 | } | ||||||
5121 | IdealInits.push_back(Field->getCanonicalDecl()); | ||||||
5122 | } | ||||||
5123 | |||||||
5124 | static const void *GetKeyForBase(ASTContext &Context, QualType BaseType) { | ||||||
5125 | return Context.getCanonicalType(BaseType).getTypePtr(); | ||||||
5126 | } | ||||||
5127 | |||||||
5128 | static const void *GetKeyForMember(ASTContext &Context, | ||||||
5129 | CXXCtorInitializer *Member) { | ||||||
5130 | if (!Member->isAnyMemberInitializer()) | ||||||
5131 | return GetKeyForBase(Context, QualType(Member->getBaseClass(), 0)); | ||||||
5132 | |||||||
5133 | return Member->getAnyMember()->getCanonicalDecl(); | ||||||
5134 | } | ||||||
5135 | |||||||
5136 | static void DiagnoseBaseOrMemInitializerOrder( | ||||||
5137 | Sema &SemaRef, const CXXConstructorDecl *Constructor, | ||||||
5138 | ArrayRef<CXXCtorInitializer *> Inits) { | ||||||
5139 | if (Constructor->getDeclContext()->isDependentContext()) | ||||||
5140 | return; | ||||||
5141 | |||||||
5142 | // Don't check initializers order unless the warning is enabled at the | ||||||
5143 | // location of at least one initializer. | ||||||
5144 | bool ShouldCheckOrder = false; | ||||||
5145 | for (unsigned InitIndex = 0; InitIndex != Inits.size(); ++InitIndex) { | ||||||
5146 | CXXCtorInitializer *Init = Inits[InitIndex]; | ||||||
5147 | if (!SemaRef.Diags.isIgnored(diag::warn_initializer_out_of_order, | ||||||
5148 | Init->getSourceLocation())) { | ||||||
5149 | ShouldCheckOrder = true; | ||||||
5150 | break; | ||||||
5151 | } | ||||||
5152 | } | ||||||
5153 | if (!ShouldCheckOrder) | ||||||
5154 | return; | ||||||
5155 | |||||||
5156 | // Build the list of bases and members in the order that they'll | ||||||
5157 | // actually be initialized. The explicit initializers should be in | ||||||
5158 | // this same order but may be missing things. | ||||||
5159 | SmallVector<const void*, 32> IdealInitKeys; | ||||||
5160 | |||||||
5161 | const CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||||
5162 | |||||||
5163 | // 1. Virtual bases. | ||||||
5164 | for (const auto &VBase : ClassDecl->vbases()) | ||||||
5165 | IdealInitKeys.push_back(GetKeyForBase(SemaRef.Context, VBase.getType())); | ||||||
5166 | |||||||
5167 | // 2. Non-virtual bases. | ||||||
5168 | for (const auto &Base : ClassDecl->bases()) { | ||||||
5169 | if (Base.isVirtual()) | ||||||
5170 | continue; | ||||||
5171 | IdealInitKeys.push_back(GetKeyForBase(SemaRef.Context, Base.getType())); | ||||||
5172 | } | ||||||
5173 | |||||||
5174 | // 3. Direct fields. | ||||||
5175 | for (auto *Field : ClassDecl->fields()) { | ||||||
5176 | if (Field->isUnnamedBitfield()) | ||||||
5177 | continue; | ||||||
5178 | |||||||
5179 | PopulateKeysForFields(Field, IdealInitKeys); | ||||||
5180 | } | ||||||
5181 | |||||||
5182 | unsigned NumIdealInits = IdealInitKeys.size(); | ||||||
5183 | unsigned IdealIndex = 0; | ||||||
5184 | |||||||
5185 | CXXCtorInitializer *PrevInit = nullptr; | ||||||
5186 | for (unsigned InitIndex = 0; InitIndex != Inits.size(); ++InitIndex) { | ||||||
5187 | CXXCtorInitializer *Init = Inits[InitIndex]; | ||||||
5188 | const void *InitKey = GetKeyForMember(SemaRef.Context, Init); | ||||||
5189 | |||||||
5190 | // Scan forward to try to find this initializer in the idealized | ||||||
5191 | // initializers list. | ||||||
5192 | for (; IdealIndex != NumIdealInits; ++IdealIndex) | ||||||
5193 | if (InitKey == IdealInitKeys[IdealIndex]) | ||||||
5194 | break; | ||||||
5195 | |||||||
5196 | // If we didn't find this initializer, it must be because we | ||||||
5197 | // scanned past it on a previous iteration. That can only | ||||||
5198 | // happen if we're out of order; emit a warning. | ||||||
5199 | if (IdealIndex == NumIdealInits && PrevInit) { | ||||||
5200 | Sema::SemaDiagnosticBuilder D = | ||||||
5201 | SemaRef.Diag(PrevInit->getSourceLocation(), | ||||||
5202 | diag::warn_initializer_out_of_order); | ||||||
5203 | |||||||
5204 | if (PrevInit->isAnyMemberInitializer()) | ||||||
5205 | D << 0 << PrevInit->getAnyMember()->getDeclName(); | ||||||
5206 | else | ||||||
5207 | D << 1 << PrevInit->getTypeSourceInfo()->getType(); | ||||||
5208 | |||||||
5209 | if (Init->isAnyMemberInitializer()) | ||||||
5210 | D << 0 << Init->getAnyMember()->getDeclName(); | ||||||
5211 | else | ||||||
5212 | D << 1 << Init->getTypeSourceInfo()->getType(); | ||||||
5213 | |||||||
5214 | // Move back to the initializer's location in the ideal list. | ||||||
5215 | for (IdealIndex = 0; IdealIndex != NumIdealInits; ++IdealIndex) | ||||||
5216 | if (InitKey == IdealInitKeys[IdealIndex]) | ||||||
5217 | break; | ||||||
5218 | |||||||
5219 | assert(IdealIndex < NumIdealInits &&((IdealIndex < NumIdealInits && "initializer not found in initializer list" ) ? static_cast<void> (0) : __assert_fail ("IdealIndex < NumIdealInits && \"initializer not found in initializer list\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5220, __PRETTY_FUNCTION__)) | ||||||
5220 | "initializer not found in initializer list")((IdealIndex < NumIdealInits && "initializer not found in initializer list" ) ? static_cast<void> (0) : __assert_fail ("IdealIndex < NumIdealInits && \"initializer not found in initializer list\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5220, __PRETTY_FUNCTION__)); | ||||||
5221 | } | ||||||
5222 | |||||||
5223 | PrevInit = Init; | ||||||
5224 | } | ||||||
5225 | } | ||||||
5226 | |||||||
5227 | namespace { | ||||||
5228 | bool CheckRedundantInit(Sema &S, | ||||||
5229 | CXXCtorInitializer *Init, | ||||||
5230 | CXXCtorInitializer *&PrevInit) { | ||||||
5231 | if (!PrevInit) { | ||||||
5232 | PrevInit = Init; | ||||||
5233 | return false; | ||||||
5234 | } | ||||||
5235 | |||||||
5236 | if (FieldDecl *Field = Init->getAnyMember()) | ||||||
5237 | S.Diag(Init->getSourceLocation(), | ||||||
5238 | diag::err_multiple_mem_initialization) | ||||||
5239 | << Field->getDeclName() | ||||||
5240 | << Init->getSourceRange(); | ||||||
5241 | else { | ||||||
5242 | const Type *BaseClass = Init->getBaseClass(); | ||||||
5243 | assert(BaseClass && "neither field nor base")((BaseClass && "neither field nor base") ? static_cast <void> (0) : __assert_fail ("BaseClass && \"neither field nor base\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5243, __PRETTY_FUNCTION__)); | ||||||
5244 | S.Diag(Init->getSourceLocation(), | ||||||
5245 | diag::err_multiple_base_initialization) | ||||||
5246 | << QualType(BaseClass, 0) | ||||||
5247 | << Init->getSourceRange(); | ||||||
5248 | } | ||||||
5249 | S.Diag(PrevInit->getSourceLocation(), diag::note_previous_initializer) | ||||||
5250 | << 0 << PrevInit->getSourceRange(); | ||||||
5251 | |||||||
5252 | return true; | ||||||
5253 | } | ||||||
5254 | |||||||
5255 | typedef std::pair<NamedDecl *, CXXCtorInitializer *> UnionEntry; | ||||||
5256 | typedef llvm::DenseMap<RecordDecl*, UnionEntry> RedundantUnionMap; | ||||||
5257 | |||||||
5258 | bool CheckRedundantUnionInit(Sema &S, | ||||||
5259 | CXXCtorInitializer *Init, | ||||||
5260 | RedundantUnionMap &Unions) { | ||||||
5261 | FieldDecl *Field = Init->getAnyMember(); | ||||||
5262 | RecordDecl *Parent = Field->getParent(); | ||||||
5263 | NamedDecl *Child = Field; | ||||||
5264 | |||||||
5265 | while (Parent->isAnonymousStructOrUnion() || Parent->isUnion()) { | ||||||
5266 | if (Parent->isUnion()) { | ||||||
5267 | UnionEntry &En = Unions[Parent]; | ||||||
5268 | if (En.first && En.first != Child) { | ||||||
5269 | S.Diag(Init->getSourceLocation(), | ||||||
5270 | diag::err_multiple_mem_union_initialization) | ||||||
5271 | << Field->getDeclName() | ||||||
5272 | << Init->getSourceRange(); | ||||||
5273 | S.Diag(En.second->getSourceLocation(), diag::note_previous_initializer) | ||||||
5274 | << 0 << En.second->getSourceRange(); | ||||||
5275 | return true; | ||||||
5276 | } | ||||||
5277 | if (!En.first) { | ||||||
5278 | En.first = Child; | ||||||
5279 | En.second = Init; | ||||||
5280 | } | ||||||
5281 | if (!Parent->isAnonymousStructOrUnion()) | ||||||
5282 | return false; | ||||||
5283 | } | ||||||
5284 | |||||||
5285 | Child = Parent; | ||||||
5286 | Parent = cast<RecordDecl>(Parent->getDeclContext()); | ||||||
5287 | } | ||||||
5288 | |||||||
5289 | return false; | ||||||
5290 | } | ||||||
5291 | } | ||||||
5292 | |||||||
5293 | /// ActOnMemInitializers - Handle the member initializers for a constructor. | ||||||
5294 | void Sema::ActOnMemInitializers(Decl *ConstructorDecl, | ||||||
5295 | SourceLocation ColonLoc, | ||||||
5296 | ArrayRef<CXXCtorInitializer*> MemInits, | ||||||
5297 | bool AnyErrors) { | ||||||
5298 | if (!ConstructorDecl) | ||||||
5299 | return; | ||||||
5300 | |||||||
5301 | AdjustDeclIfTemplate(ConstructorDecl); | ||||||
5302 | |||||||
5303 | CXXConstructorDecl *Constructor | ||||||
5304 | = dyn_cast<CXXConstructorDecl>(ConstructorDecl); | ||||||
5305 | |||||||
5306 | if (!Constructor) { | ||||||
5307 | Diag(ColonLoc, diag::err_only_constructors_take_base_inits); | ||||||
5308 | return; | ||||||
5309 | } | ||||||
5310 | |||||||
5311 | // Mapping for the duplicate initializers check. | ||||||
5312 | // For member initializers, this is keyed with a FieldDecl*. | ||||||
5313 | // For base initializers, this is keyed with a Type*. | ||||||
5314 | llvm::DenseMap<const void *, CXXCtorInitializer *> Members; | ||||||
5315 | |||||||
5316 | // Mapping for the inconsistent anonymous-union initializers check. | ||||||
5317 | RedundantUnionMap MemberUnions; | ||||||
5318 | |||||||
5319 | bool HadError = false; | ||||||
5320 | for (unsigned i = 0; i < MemInits.size(); i++) { | ||||||
5321 | CXXCtorInitializer *Init = MemInits[i]; | ||||||
5322 | |||||||
5323 | // Set the source order index. | ||||||
5324 | Init->setSourceOrder(i); | ||||||
5325 | |||||||
5326 | if (Init->isAnyMemberInitializer()) { | ||||||
5327 | const void *Key = GetKeyForMember(Context, Init); | ||||||
5328 | if (CheckRedundantInit(*this, Init, Members[Key]) || | ||||||
5329 | CheckRedundantUnionInit(*this, Init, MemberUnions)) | ||||||
5330 | HadError = true; | ||||||
5331 | } else if (Init->isBaseInitializer()) { | ||||||
5332 | const void *Key = GetKeyForMember(Context, Init); | ||||||
5333 | if (CheckRedundantInit(*this, Init, Members[Key])) | ||||||
5334 | HadError = true; | ||||||
5335 | } else { | ||||||
5336 | assert(Init->isDelegatingInitializer())((Init->isDelegatingInitializer()) ? static_cast<void> (0) : __assert_fail ("Init->isDelegatingInitializer()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5336, __PRETTY_FUNCTION__)); | ||||||
5337 | // This must be the only initializer | ||||||
5338 | if (MemInits.size() != 1) { | ||||||
5339 | Diag(Init->getSourceLocation(), | ||||||
5340 | diag::err_delegating_initializer_alone) | ||||||
5341 | << Init->getSourceRange() << MemInits[i ? 0 : 1]->getSourceRange(); | ||||||
5342 | // We will treat this as being the only initializer. | ||||||
5343 | } | ||||||
5344 | SetDelegatingInitializer(Constructor, MemInits[i]); | ||||||
5345 | // Return immediately as the initializer is set. | ||||||
5346 | return; | ||||||
5347 | } | ||||||
5348 | } | ||||||
5349 | |||||||
5350 | if (HadError) | ||||||
5351 | return; | ||||||
5352 | |||||||
5353 | DiagnoseBaseOrMemInitializerOrder(*this, Constructor, MemInits); | ||||||
5354 | |||||||
5355 | SetCtorInitializers(Constructor, AnyErrors, MemInits); | ||||||
5356 | |||||||
5357 | DiagnoseUninitializedFields(*this, Constructor); | ||||||
5358 | } | ||||||
5359 | |||||||
5360 | void | ||||||
5361 | Sema::MarkBaseAndMemberDestructorsReferenced(SourceLocation Location, | ||||||
5362 | CXXRecordDecl *ClassDecl) { | ||||||
5363 | // Ignore dependent contexts. Also ignore unions, since their members never | ||||||
5364 | // have destructors implicitly called. | ||||||
5365 | if (ClassDecl->isDependentContext() || ClassDecl->isUnion()) | ||||||
5366 | return; | ||||||
5367 | |||||||
5368 | // FIXME: all the access-control diagnostics are positioned on the | ||||||
5369 | // field/base declaration. That's probably good; that said, the | ||||||
5370 | // user might reasonably want to know why the destructor is being | ||||||
5371 | // emitted, and we currently don't say. | ||||||
5372 | |||||||
5373 | // Non-static data members. | ||||||
5374 | for (auto *Field : ClassDecl->fields()) { | ||||||
5375 | if (Field->isInvalidDecl()) | ||||||
5376 | continue; | ||||||
5377 | |||||||
5378 | // Don't destroy incomplete or zero-length arrays. | ||||||
5379 | if (isIncompleteOrZeroLengthArrayType(Context, Field->getType())) | ||||||
5380 | continue; | ||||||
5381 | |||||||
5382 | QualType FieldType = Context.getBaseElementType(Field->getType()); | ||||||
5383 | |||||||
5384 | const RecordType* RT = FieldType->getAs<RecordType>(); | ||||||
5385 | if (!RT) | ||||||
5386 | continue; | ||||||
5387 | |||||||
5388 | CXXRecordDecl *FieldClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
5389 | if (FieldClassDecl->isInvalidDecl()) | ||||||
5390 | continue; | ||||||
5391 | if (FieldClassDecl->hasIrrelevantDestructor()) | ||||||
5392 | continue; | ||||||
5393 | // The destructor for an implicit anonymous union member is never invoked. | ||||||
5394 | if (FieldClassDecl->isUnion() && FieldClassDecl->isAnonymousStructOrUnion()) | ||||||
5395 | continue; | ||||||
5396 | |||||||
5397 | CXXDestructorDecl *Dtor = LookupDestructor(FieldClassDecl); | ||||||
5398 | assert(Dtor && "No dtor found for FieldClassDecl!")((Dtor && "No dtor found for FieldClassDecl!") ? static_cast <void> (0) : __assert_fail ("Dtor && \"No dtor found for FieldClassDecl!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5398, __PRETTY_FUNCTION__)); | ||||||
5399 | CheckDestructorAccess(Field->getLocation(), Dtor, | ||||||
5400 | PDiag(diag::err_access_dtor_field) | ||||||
5401 | << Field->getDeclName() | ||||||
5402 | << FieldType); | ||||||
5403 | |||||||
5404 | MarkFunctionReferenced(Location, Dtor); | ||||||
5405 | DiagnoseUseOfDecl(Dtor, Location); | ||||||
5406 | } | ||||||
5407 | |||||||
5408 | // We only potentially invoke the destructors of potentially constructed | ||||||
5409 | // subobjects. | ||||||
5410 | bool VisitVirtualBases = !ClassDecl->isAbstract(); | ||||||
5411 | |||||||
5412 | llvm::SmallPtrSet<const RecordType *, 8> DirectVirtualBases; | ||||||
5413 | |||||||
5414 | // Bases. | ||||||
5415 | for (const auto &Base : ClassDecl->bases()) { | ||||||
5416 | // Bases are always records in a well-formed non-dependent class. | ||||||
5417 | const RecordType *RT = Base.getType()->getAs<RecordType>(); | ||||||
5418 | |||||||
5419 | // Remember direct virtual bases. | ||||||
5420 | if (Base.isVirtual()) { | ||||||
5421 | if (!VisitVirtualBases) | ||||||
5422 | continue; | ||||||
5423 | DirectVirtualBases.insert(RT); | ||||||
5424 | } | ||||||
5425 | |||||||
5426 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
5427 | // If our base class is invalid, we probably can't get its dtor anyway. | ||||||
5428 | if (BaseClassDecl->isInvalidDecl()) | ||||||
5429 | continue; | ||||||
5430 | if (BaseClassDecl->hasIrrelevantDestructor()) | ||||||
5431 | continue; | ||||||
5432 | |||||||
5433 | CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl); | ||||||
5434 | assert(Dtor && "No dtor found for BaseClassDecl!")((Dtor && "No dtor found for BaseClassDecl!") ? static_cast <void> (0) : __assert_fail ("Dtor && \"No dtor found for BaseClassDecl!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5434, __PRETTY_FUNCTION__)); | ||||||
5435 | |||||||
5436 | // FIXME: caret should be on the start of the class name | ||||||
5437 | CheckDestructorAccess(Base.getBeginLoc(), Dtor, | ||||||
5438 | PDiag(diag::err_access_dtor_base) | ||||||
5439 | << Base.getType() << Base.getSourceRange(), | ||||||
5440 | Context.getTypeDeclType(ClassDecl)); | ||||||
5441 | |||||||
5442 | MarkFunctionReferenced(Location, Dtor); | ||||||
5443 | DiagnoseUseOfDecl(Dtor, Location); | ||||||
5444 | } | ||||||
5445 | |||||||
5446 | if (!VisitVirtualBases) | ||||||
5447 | return; | ||||||
5448 | |||||||
5449 | // Virtual bases. | ||||||
5450 | for (const auto &VBase : ClassDecl->vbases()) { | ||||||
5451 | // Bases are always records in a well-formed non-dependent class. | ||||||
5452 | const RecordType *RT = VBase.getType()->castAs<RecordType>(); | ||||||
5453 | |||||||
5454 | // Ignore direct virtual bases. | ||||||
5455 | if (DirectVirtualBases.count(RT)) | ||||||
5456 | continue; | ||||||
5457 | |||||||
5458 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
5459 | // If our base class is invalid, we probably can't get its dtor anyway. | ||||||
5460 | if (BaseClassDecl->isInvalidDecl()) | ||||||
5461 | continue; | ||||||
5462 | if (BaseClassDecl->hasIrrelevantDestructor()) | ||||||
5463 | continue; | ||||||
5464 | |||||||
5465 | CXXDestructorDecl *Dtor = LookupDestructor(BaseClassDecl); | ||||||
5466 | assert(Dtor && "No dtor found for BaseClassDecl!")((Dtor && "No dtor found for BaseClassDecl!") ? static_cast <void> (0) : __assert_fail ("Dtor && \"No dtor found for BaseClassDecl!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5466, __PRETTY_FUNCTION__)); | ||||||
5467 | if (CheckDestructorAccess( | ||||||
5468 | ClassDecl->getLocation(), Dtor, | ||||||
5469 | PDiag(diag::err_access_dtor_vbase) | ||||||
5470 | << Context.getTypeDeclType(ClassDecl) << VBase.getType(), | ||||||
5471 | Context.getTypeDeclType(ClassDecl)) == | ||||||
5472 | AR_accessible) { | ||||||
5473 | CheckDerivedToBaseConversion( | ||||||
5474 | Context.getTypeDeclType(ClassDecl), VBase.getType(), | ||||||
5475 | diag::err_access_dtor_vbase, 0, ClassDecl->getLocation(), | ||||||
5476 | SourceRange(), DeclarationName(), nullptr); | ||||||
5477 | } | ||||||
5478 | |||||||
5479 | MarkFunctionReferenced(Location, Dtor); | ||||||
5480 | DiagnoseUseOfDecl(Dtor, Location); | ||||||
5481 | } | ||||||
5482 | } | ||||||
5483 | |||||||
5484 | void Sema::ActOnDefaultCtorInitializers(Decl *CDtorDecl) { | ||||||
5485 | if (!CDtorDecl) | ||||||
5486 | return; | ||||||
5487 | |||||||
5488 | if (CXXConstructorDecl *Constructor | ||||||
5489 | = dyn_cast<CXXConstructorDecl>(CDtorDecl)) { | ||||||
5490 | SetCtorInitializers(Constructor, /*AnyErrors=*/false); | ||||||
5491 | DiagnoseUninitializedFields(*this, Constructor); | ||||||
5492 | } | ||||||
5493 | } | ||||||
5494 | |||||||
5495 | bool Sema::isAbstractType(SourceLocation Loc, QualType T) { | ||||||
5496 | if (!getLangOpts().CPlusPlus) | ||||||
5497 | return false; | ||||||
5498 | |||||||
5499 | const auto *RD = Context.getBaseElementType(T)->getAsCXXRecordDecl(); | ||||||
5500 | if (!RD) | ||||||
5501 | return false; | ||||||
5502 | |||||||
5503 | // FIXME: Per [temp.inst]p1, we are supposed to trigger instantiation of a | ||||||
5504 | // class template specialization here, but doing so breaks a lot of code. | ||||||
5505 | |||||||
5506 | // We can't answer whether something is abstract until it has a | ||||||
5507 | // definition. If it's currently being defined, we'll walk back | ||||||
5508 | // over all the declarations when we have a full definition. | ||||||
5509 | const CXXRecordDecl *Def = RD->getDefinition(); | ||||||
5510 | if (!Def || Def->isBeingDefined()) | ||||||
5511 | return false; | ||||||
5512 | |||||||
5513 | return RD->isAbstract(); | ||||||
5514 | } | ||||||
5515 | |||||||
5516 | bool Sema::RequireNonAbstractType(SourceLocation Loc, QualType T, | ||||||
5517 | TypeDiagnoser &Diagnoser) { | ||||||
5518 | if (!isAbstractType(Loc, T)) | ||||||
5519 | return false; | ||||||
5520 | |||||||
5521 | T = Context.getBaseElementType(T); | ||||||
5522 | Diagnoser.diagnose(*this, Loc, T); | ||||||
5523 | DiagnoseAbstractType(T->getAsCXXRecordDecl()); | ||||||
5524 | return true; | ||||||
5525 | } | ||||||
5526 | |||||||
5527 | void Sema::DiagnoseAbstractType(const CXXRecordDecl *RD) { | ||||||
5528 | // Check if we've already emitted the list of pure virtual functions | ||||||
5529 | // for this class. | ||||||
5530 | if (PureVirtualClassDiagSet && PureVirtualClassDiagSet->count(RD)) | ||||||
5531 | return; | ||||||
5532 | |||||||
5533 | // If the diagnostic is suppressed, don't emit the notes. We're only | ||||||
5534 | // going to emit them once, so try to attach them to a diagnostic we're | ||||||
5535 | // actually going to show. | ||||||
5536 | if (Diags.isLastDiagnosticIgnored()) | ||||||
5537 | return; | ||||||
5538 | |||||||
5539 | CXXFinalOverriderMap FinalOverriders; | ||||||
5540 | RD->getFinalOverriders(FinalOverriders); | ||||||
5541 | |||||||
5542 | // Keep a set of seen pure methods so we won't diagnose the same method | ||||||
5543 | // more than once. | ||||||
5544 | llvm::SmallPtrSet<const CXXMethodDecl *, 8> SeenPureMethods; | ||||||
5545 | |||||||
5546 | for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(), | ||||||
5547 | MEnd = FinalOverriders.end(); | ||||||
5548 | M != MEnd; | ||||||
5549 | ++M) { | ||||||
5550 | for (OverridingMethods::iterator SO = M->second.begin(), | ||||||
5551 | SOEnd = M->second.end(); | ||||||
5552 | SO != SOEnd; ++SO) { | ||||||
5553 | // C++ [class.abstract]p4: | ||||||
5554 | // A class is abstract if it contains or inherits at least one | ||||||
5555 | // pure virtual function for which the final overrider is pure | ||||||
5556 | // virtual. | ||||||
5557 | |||||||
5558 | // | ||||||
5559 | if (SO->second.size() != 1) | ||||||
5560 | continue; | ||||||
5561 | |||||||
5562 | if (!SO->second.front().Method->isPure()) | ||||||
5563 | continue; | ||||||
5564 | |||||||
5565 | if (!SeenPureMethods.insert(SO->second.front().Method).second) | ||||||
5566 | continue; | ||||||
5567 | |||||||
5568 | Diag(SO->second.front().Method->getLocation(), | ||||||
5569 | diag::note_pure_virtual_function) | ||||||
5570 | << SO->second.front().Method->getDeclName() << RD->getDeclName(); | ||||||
5571 | } | ||||||
5572 | } | ||||||
5573 | |||||||
5574 | if (!PureVirtualClassDiagSet) | ||||||
5575 | PureVirtualClassDiagSet.reset(new RecordDeclSetTy); | ||||||
5576 | PureVirtualClassDiagSet->insert(RD); | ||||||
5577 | } | ||||||
5578 | |||||||
5579 | namespace { | ||||||
5580 | struct AbstractUsageInfo { | ||||||
5581 | Sema &S; | ||||||
5582 | CXXRecordDecl *Record; | ||||||
5583 | CanQualType AbstractType; | ||||||
5584 | bool Invalid; | ||||||
5585 | |||||||
5586 | AbstractUsageInfo(Sema &S, CXXRecordDecl *Record) | ||||||
5587 | : S(S), Record(Record), | ||||||
5588 | AbstractType(S.Context.getCanonicalType( | ||||||
5589 | S.Context.getTypeDeclType(Record))), | ||||||
5590 | Invalid(false) {} | ||||||
5591 | |||||||
5592 | void DiagnoseAbstractType() { | ||||||
5593 | if (Invalid) return; | ||||||
5594 | S.DiagnoseAbstractType(Record); | ||||||
5595 | Invalid = true; | ||||||
5596 | } | ||||||
5597 | |||||||
5598 | void CheckType(const NamedDecl *D, TypeLoc TL, Sema::AbstractDiagSelID Sel); | ||||||
5599 | }; | ||||||
5600 | |||||||
5601 | struct CheckAbstractUsage { | ||||||
5602 | AbstractUsageInfo &Info; | ||||||
5603 | const NamedDecl *Ctx; | ||||||
5604 | |||||||
5605 | CheckAbstractUsage(AbstractUsageInfo &Info, const NamedDecl *Ctx) | ||||||
5606 | : Info(Info), Ctx(Ctx) {} | ||||||
5607 | |||||||
5608 | void Visit(TypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||
5609 | switch (TL.getTypeLocClass()) { | ||||||
5610 | #define ABSTRACT_TYPELOC(CLASS, PARENT) | ||||||
5611 | #define TYPELOC(CLASS, PARENT) \ | ||||||
5612 | case TypeLoc::CLASS: Check(TL.castAs<CLASS##TypeLoc>(), Sel); break; | ||||||
5613 | #include "clang/AST/TypeLocNodes.def" | ||||||
5614 | } | ||||||
5615 | } | ||||||
5616 | |||||||
5617 | void Check(FunctionProtoTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||
5618 | Visit(TL.getReturnLoc(), Sema::AbstractReturnType); | ||||||
5619 | for (unsigned I = 0, E = TL.getNumParams(); I != E; ++I) { | ||||||
5620 | if (!TL.getParam(I)) | ||||||
5621 | continue; | ||||||
5622 | |||||||
5623 | TypeSourceInfo *TSI = TL.getParam(I)->getTypeSourceInfo(); | ||||||
5624 | if (TSI) Visit(TSI->getTypeLoc(), Sema::AbstractParamType); | ||||||
5625 | } | ||||||
5626 | } | ||||||
5627 | |||||||
5628 | void Check(ArrayTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||
5629 | Visit(TL.getElementLoc(), Sema::AbstractArrayType); | ||||||
5630 | } | ||||||
5631 | |||||||
5632 | void Check(TemplateSpecializationTypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||
5633 | // Visit the type parameters from a permissive context. | ||||||
5634 | for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) { | ||||||
5635 | TemplateArgumentLoc TAL = TL.getArgLoc(I); | ||||||
5636 | if (TAL.getArgument().getKind() == TemplateArgument::Type) | ||||||
5637 | if (TypeSourceInfo *TSI = TAL.getTypeSourceInfo()) | ||||||
5638 | Visit(TSI->getTypeLoc(), Sema::AbstractNone); | ||||||
5639 | // TODO: other template argument types? | ||||||
5640 | } | ||||||
5641 | } | ||||||
5642 | |||||||
5643 | // Visit pointee types from a permissive context. | ||||||
5644 | #define CheckPolymorphic(Type)void Check(Type TL, Sema::AbstractDiagSelID Sel) { Visit(TL.getNextTypeLoc (), Sema::AbstractNone); } \ | ||||||
5645 | void Check(Type TL, Sema::AbstractDiagSelID Sel) { \ | ||||||
5646 | Visit(TL.getNextTypeLoc(), Sema::AbstractNone); \ | ||||||
5647 | } | ||||||
5648 | CheckPolymorphic(PointerTypeLoc)void Check(PointerTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit (TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||
5649 | CheckPolymorphic(ReferenceTypeLoc)void Check(ReferenceTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||
5650 | CheckPolymorphic(MemberPointerTypeLoc)void Check(MemberPointerTypeLoc TL, Sema::AbstractDiagSelID Sel ) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||
5651 | CheckPolymorphic(BlockPointerTypeLoc)void Check(BlockPointerTypeLoc TL, Sema::AbstractDiagSelID Sel ) { Visit(TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||
5652 | CheckPolymorphic(AtomicTypeLoc)void Check(AtomicTypeLoc TL, Sema::AbstractDiagSelID Sel) { Visit (TL.getNextTypeLoc(), Sema::AbstractNone); } | ||||||
5653 | |||||||
5654 | /// Handle all the types we haven't given a more specific | ||||||
5655 | /// implementation for above. | ||||||
5656 | void Check(TypeLoc TL, Sema::AbstractDiagSelID Sel) { | ||||||
5657 | // Every other kind of type that we haven't called out already | ||||||
5658 | // that has an inner type is either (1) sugar or (2) contains that | ||||||
5659 | // inner type in some way as a subobject. | ||||||
5660 | if (TypeLoc Next = TL.getNextTypeLoc()) | ||||||
5661 | return Visit(Next, Sel); | ||||||
5662 | |||||||
5663 | // If there's no inner type and we're in a permissive context, | ||||||
5664 | // don't diagnose. | ||||||
5665 | if (Sel == Sema::AbstractNone) return; | ||||||
5666 | |||||||
5667 | // Check whether the type matches the abstract type. | ||||||
5668 | QualType T = TL.getType(); | ||||||
5669 | if (T->isArrayType()) { | ||||||
5670 | Sel = Sema::AbstractArrayType; | ||||||
5671 | T = Info.S.Context.getBaseElementType(T); | ||||||
5672 | } | ||||||
5673 | CanQualType CT = T->getCanonicalTypeUnqualified().getUnqualifiedType(); | ||||||
5674 | if (CT != Info.AbstractType) return; | ||||||
5675 | |||||||
5676 | // It matched; do some magic. | ||||||
5677 | if (Sel == Sema::AbstractArrayType) { | ||||||
5678 | Info.S.Diag(Ctx->getLocation(), diag::err_array_of_abstract_type) | ||||||
5679 | << T << TL.getSourceRange(); | ||||||
5680 | } else { | ||||||
5681 | Info.S.Diag(Ctx->getLocation(), diag::err_abstract_type_in_decl) | ||||||
5682 | << Sel << T << TL.getSourceRange(); | ||||||
5683 | } | ||||||
5684 | Info.DiagnoseAbstractType(); | ||||||
5685 | } | ||||||
5686 | }; | ||||||
5687 | |||||||
5688 | void AbstractUsageInfo::CheckType(const NamedDecl *D, TypeLoc TL, | ||||||
5689 | Sema::AbstractDiagSelID Sel) { | ||||||
5690 | CheckAbstractUsage(*this, D).Visit(TL, Sel); | ||||||
5691 | } | ||||||
5692 | |||||||
5693 | } | ||||||
5694 | |||||||
5695 | /// Check for invalid uses of an abstract type in a method declaration. | ||||||
5696 | static void CheckAbstractClassUsage(AbstractUsageInfo &Info, | ||||||
5697 | CXXMethodDecl *MD) { | ||||||
5698 | // No need to do the check on definitions, which require that | ||||||
5699 | // the return/param types be complete. | ||||||
5700 | if (MD->doesThisDeclarationHaveABody()) | ||||||
5701 | return; | ||||||
5702 | |||||||
5703 | // For safety's sake, just ignore it if we don't have type source | ||||||
5704 | // information. This should never happen for non-implicit methods, | ||||||
5705 | // but... | ||||||
5706 | if (TypeSourceInfo *TSI = MD->getTypeSourceInfo()) | ||||||
5707 | Info.CheckType(MD, TSI->getTypeLoc(), Sema::AbstractNone); | ||||||
5708 | } | ||||||
5709 | |||||||
5710 | /// Check for invalid uses of an abstract type within a class definition. | ||||||
5711 | static void CheckAbstractClassUsage(AbstractUsageInfo &Info, | ||||||
5712 | CXXRecordDecl *RD) { | ||||||
5713 | for (auto *D : RD->decls()) { | ||||||
5714 | if (D->isImplicit()) continue; | ||||||
5715 | |||||||
5716 | // Methods and method templates. | ||||||
5717 | if (isa<CXXMethodDecl>(D)) { | ||||||
5718 | CheckAbstractClassUsage(Info, cast<CXXMethodDecl>(D)); | ||||||
5719 | } else if (isa<FunctionTemplateDecl>(D)) { | ||||||
5720 | FunctionDecl *FD = cast<FunctionTemplateDecl>(D)->getTemplatedDecl(); | ||||||
5721 | CheckAbstractClassUsage(Info, cast<CXXMethodDecl>(FD)); | ||||||
5722 | |||||||
5723 | // Fields and static variables. | ||||||
5724 | } else if (isa<FieldDecl>(D)) { | ||||||
5725 | FieldDecl *FD = cast<FieldDecl>(D); | ||||||
5726 | if (TypeSourceInfo *TSI = FD->getTypeSourceInfo()) | ||||||
5727 | Info.CheckType(FD, TSI->getTypeLoc(), Sema::AbstractFieldType); | ||||||
5728 | } else if (isa<VarDecl>(D)) { | ||||||
5729 | VarDecl *VD = cast<VarDecl>(D); | ||||||
5730 | if (TypeSourceInfo *TSI = VD->getTypeSourceInfo()) | ||||||
5731 | Info.CheckType(VD, TSI->getTypeLoc(), Sema::AbstractVariableType); | ||||||
5732 | |||||||
5733 | // Nested classes and class templates. | ||||||
5734 | } else if (isa<CXXRecordDecl>(D)) { | ||||||
5735 | CheckAbstractClassUsage(Info, cast<CXXRecordDecl>(D)); | ||||||
5736 | } else if (isa<ClassTemplateDecl>(D)) { | ||||||
5737 | CheckAbstractClassUsage(Info, | ||||||
5738 | cast<ClassTemplateDecl>(D)->getTemplatedDecl()); | ||||||
5739 | } | ||||||
5740 | } | ||||||
5741 | } | ||||||
5742 | |||||||
5743 | static void ReferenceDllExportedMembers(Sema &S, CXXRecordDecl *Class) { | ||||||
5744 | Attr *ClassAttr = getDLLAttr(Class); | ||||||
5745 | if (!ClassAttr) | ||||||
5746 | return; | ||||||
5747 | |||||||
5748 | assert(ClassAttr->getKind() == attr::DLLExport)((ClassAttr->getKind() == attr::DLLExport) ? static_cast< void> (0) : __assert_fail ("ClassAttr->getKind() == attr::DLLExport" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 5748, __PRETTY_FUNCTION__)); | ||||||
5749 | |||||||
5750 | TemplateSpecializationKind TSK = Class->getTemplateSpecializationKind(); | ||||||
5751 | |||||||
5752 | if (TSK == TSK_ExplicitInstantiationDeclaration) | ||||||
5753 | // Don't go any further if this is just an explicit instantiation | ||||||
5754 | // declaration. | ||||||
5755 | return; | ||||||
5756 | |||||||
5757 | if (S.Context.getTargetInfo().getTriple().isWindowsGNUEnvironment()) | ||||||
5758 | S.MarkVTableUsed(Class->getLocation(), Class, true); | ||||||
5759 | |||||||
5760 | for (Decl *Member : Class->decls()) { | ||||||
5761 | // Defined static variables that are members of an exported base | ||||||
5762 | // class must be marked export too. | ||||||
5763 | auto *VD = dyn_cast<VarDecl>(Member); | ||||||
5764 | if (VD && Member->getAttr<DLLExportAttr>() && | ||||||
5765 | VD->getStorageClass() == SC_Static && | ||||||
5766 | TSK == TSK_ImplicitInstantiation) | ||||||
5767 | S.MarkVariableReferenced(VD->getLocation(), VD); | ||||||
5768 | |||||||
5769 | auto *MD = dyn_cast<CXXMethodDecl>(Member); | ||||||
5770 | if (!MD) | ||||||
5771 | continue; | ||||||
5772 | |||||||
5773 | if (Member->getAttr<DLLExportAttr>()) { | ||||||
5774 | if (MD->isUserProvided()) { | ||||||
5775 | // Instantiate non-default class member functions ... | ||||||
5776 | |||||||
5777 | // .. except for certain kinds of template specializations. | ||||||
5778 | if (TSK == TSK_ImplicitInstantiation && !ClassAttr->isInherited()) | ||||||
5779 | continue; | ||||||
5780 | |||||||
5781 | S.MarkFunctionReferenced(Class->getLocation(), MD); | ||||||
5782 | |||||||
5783 | // The function will be passed to the consumer when its definition is | ||||||
5784 | // encountered. | ||||||
5785 | } else if (!MD->isTrivial() || MD->isExplicitlyDefaulted() || | ||||||
5786 | MD->isCopyAssignmentOperator() || | ||||||
5787 | MD->isMoveAssignmentOperator()) { | ||||||
5788 | // Synthesize and instantiate non-trivial implicit methods, explicitly | ||||||
5789 | // defaulted methods, and the copy and move assignment operators. The | ||||||
5790 | // latter are exported even if they are trivial, because the address of | ||||||
5791 | // an operator can be taken and should compare equal across libraries. | ||||||
5792 | DiagnosticErrorTrap Trap(S.Diags); | ||||||
5793 | S.MarkFunctionReferenced(Class->getLocation(), MD); | ||||||
5794 | if (Trap.hasErrorOccurred()) { | ||||||
5795 | S.Diag(ClassAttr->getLocation(), diag::note_due_to_dllexported_class) | ||||||
5796 | << Class << !S.getLangOpts().CPlusPlus11; | ||||||
5797 | break; | ||||||
5798 | } | ||||||
5799 | |||||||
5800 | // There is no later point when we will see the definition of this | ||||||
5801 | // function, so pass it to the consumer now. | ||||||
5802 | S.Consumer.HandleTopLevelDecl(DeclGroupRef(MD)); | ||||||
5803 | } | ||||||
5804 | } | ||||||
5805 | } | ||||||
5806 | } | ||||||
5807 | |||||||
5808 | static void checkForMultipleExportedDefaultConstructors(Sema &S, | ||||||
5809 | CXXRecordDecl *Class) { | ||||||
5810 | // Only the MS ABI has default constructor closures, so we don't need to do | ||||||
5811 | // this semantic checking anywhere else. | ||||||
5812 | if (!S.Context.getTargetInfo().getCXXABI().isMicrosoft()) | ||||||
5813 | return; | ||||||
5814 | |||||||
5815 | CXXConstructorDecl *LastExportedDefaultCtor = nullptr; | ||||||
5816 | for (Decl *Member : Class->decls()) { | ||||||
5817 | // Look for exported default constructors. | ||||||
5818 | auto *CD = dyn_cast<CXXConstructorDecl>(Member); | ||||||
5819 | if (!CD || !CD->isDefaultConstructor()) | ||||||
5820 | continue; | ||||||
5821 | auto *Attr = CD->getAttr<DLLExportAttr>(); | ||||||
5822 | if (!Attr) | ||||||
5823 | continue; | ||||||
5824 | |||||||
5825 | // If the class is non-dependent, mark the default arguments as ODR-used so | ||||||
5826 | // that we can properly codegen the constructor closure. | ||||||
5827 | if (!Class->isDependentContext()) { | ||||||
5828 | for (ParmVarDecl *PD : CD->parameters()) { | ||||||
5829 | (void)S.CheckCXXDefaultArgExpr(Attr->getLocation(), CD, PD); | ||||||
5830 | S.DiscardCleanupsInEvaluationContext(); | ||||||
5831 | } | ||||||
5832 | } | ||||||
5833 | |||||||
5834 | if (LastExportedDefaultCtor) { | ||||||
5835 | S.Diag(LastExportedDefaultCtor->getLocation(), | ||||||
5836 | diag::err_attribute_dll_ambiguous_default_ctor) | ||||||
5837 | << Class; | ||||||
5838 | S.Diag(CD->getLocation(), diag::note_entity_declared_at) | ||||||
5839 | << CD->getDeclName(); | ||||||
5840 | return; | ||||||
5841 | } | ||||||
5842 | LastExportedDefaultCtor = CD; | ||||||
5843 | } | ||||||
5844 | } | ||||||
5845 | |||||||
5846 | void Sema::checkClassLevelCodeSegAttribute(CXXRecordDecl *Class) { | ||||||
5847 | // Mark any compiler-generated routines with the implicit code_seg attribute. | ||||||
5848 | for (auto *Method : Class->methods()) { | ||||||
5849 | if (Method->isUserProvided()) | ||||||
5850 | continue; | ||||||
5851 | if (Attr *A = getImplicitCodeSegOrSectionAttrForFunction(Method, /*IsDefinition=*/true)) | ||||||
5852 | Method->addAttr(A); | ||||||
5853 | } | ||||||
5854 | } | ||||||
5855 | |||||||
5856 | /// Check class-level dllimport/dllexport attribute. | ||||||
5857 | void Sema::checkClassLevelDLLAttribute(CXXRecordDecl *Class) { | ||||||
5858 | Attr *ClassAttr = getDLLAttr(Class); | ||||||
5859 | |||||||
5860 | // MSVC inherits DLL attributes to partial class template specializations. | ||||||
5861 | if (Context.getTargetInfo().getCXXABI().isMicrosoft() && !ClassAttr) { | ||||||
5862 | if (auto *Spec = dyn_cast<ClassTemplatePartialSpecializationDecl>(Class)) { | ||||||
5863 | if (Attr *TemplateAttr = | ||||||
5864 | getDLLAttr(Spec->getSpecializedTemplate()->getTemplatedDecl())) { | ||||||
5865 | auto *A = cast<InheritableAttr>(TemplateAttr->clone(getASTContext())); | ||||||
5866 | A->setInherited(true); | ||||||
5867 | ClassAttr = A; | ||||||
5868 | } | ||||||
5869 | } | ||||||
5870 | } | ||||||
5871 | |||||||
5872 | if (!ClassAttr) | ||||||
5873 | return; | ||||||
5874 | |||||||
5875 | if (!Class->isExternallyVisible()) { | ||||||
5876 | Diag(Class->getLocation(), diag::err_attribute_dll_not_extern) | ||||||
5877 | << Class << ClassAttr; | ||||||
5878 | return; | ||||||
5879 | } | ||||||
5880 | |||||||
5881 | if (Context.getTargetInfo().getCXXABI().isMicrosoft() && | ||||||
5882 | !ClassAttr->isInherited()) { | ||||||
5883 | // Diagnose dll attributes on members of class with dll attribute. | ||||||
5884 | for (Decl *Member : Class->decls()) { | ||||||
5885 | if (!isa<VarDecl>(Member) && !isa<CXXMethodDecl>(Member)) | ||||||
5886 | continue; | ||||||
5887 | InheritableAttr *MemberAttr = getDLLAttr(Member); | ||||||
5888 | if (!MemberAttr || MemberAttr->isInherited() || Member->isInvalidDecl()) | ||||||
5889 | continue; | ||||||
5890 | |||||||
5891 | Diag(MemberAttr->getLocation(), | ||||||
5892 | diag::err_attribute_dll_member_of_dll_class) | ||||||
5893 | << MemberAttr << ClassAttr; | ||||||
5894 | Diag(ClassAttr->getLocation(), diag::note_previous_attribute); | ||||||
5895 | Member->setInvalidDecl(); | ||||||
5896 | } | ||||||
5897 | } | ||||||
5898 | |||||||
5899 | if (Class->getDescribedClassTemplate()) | ||||||
5900 | // Don't inherit dll attribute until the template is instantiated. | ||||||
5901 | return; | ||||||
5902 | |||||||
5903 | // The class is either imported or exported. | ||||||
5904 | const bool ClassExported = ClassAttr->getKind() == attr::DLLExport; | ||||||
5905 | |||||||
5906 | // Check if this was a dllimport attribute propagated from a derived class to | ||||||
5907 | // a base class template specialization. We don't apply these attributes to | ||||||
5908 | // static data members. | ||||||
5909 | const bool PropagatedImport = | ||||||
5910 | !ClassExported && | ||||||
5911 | cast<DLLImportAttr>(ClassAttr)->wasPropagatedToBaseTemplate(); | ||||||
5912 | |||||||
5913 | TemplateSpecializationKind TSK = Class->getTemplateSpecializationKind(); | ||||||
5914 | |||||||
5915 | // Ignore explicit dllexport on explicit class template instantiation | ||||||
5916 | // declarations, except in MinGW mode. | ||||||
5917 | if (ClassExported && !ClassAttr->isInherited() && | ||||||
5918 | TSK == TSK_ExplicitInstantiationDeclaration && | ||||||
5919 | !Context.getTargetInfo().getTriple().isWindowsGNUEnvironment()) { | ||||||
5920 | Class->dropAttr<DLLExportAttr>(); | ||||||
5921 | return; | ||||||
5922 | } | ||||||
5923 | |||||||
5924 | // Force declaration of implicit members so they can inherit the attribute. | ||||||
5925 | ForceDeclarationOfImplicitMembers(Class); | ||||||
5926 | |||||||
5927 | // FIXME: MSVC's docs say all bases must be exportable, but this doesn't | ||||||
5928 | // seem to be true in practice? | ||||||
5929 | |||||||
5930 | for (Decl *Member : Class->decls()) { | ||||||
5931 | VarDecl *VD = dyn_cast<VarDecl>(Member); | ||||||
5932 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Member); | ||||||
5933 | |||||||
5934 | // Only methods and static fields inherit the attributes. | ||||||
5935 | if (!VD && !MD) | ||||||
5936 | continue; | ||||||
5937 | |||||||
5938 | if (MD) { | ||||||
5939 | // Don't process deleted methods. | ||||||
5940 | if (MD->isDeleted()) | ||||||
5941 | continue; | ||||||
5942 | |||||||
5943 | if (MD->isInlined()) { | ||||||
5944 | // MinGW does not import or export inline methods. But do it for | ||||||
5945 | // template instantiations. | ||||||
5946 | if (!Context.getTargetInfo().getCXXABI().isMicrosoft() && | ||||||
5947 | !Context.getTargetInfo().getTriple().isWindowsItaniumEnvironment() && | ||||||
5948 | TSK != TSK_ExplicitInstantiationDeclaration && | ||||||
5949 | TSK != TSK_ExplicitInstantiationDefinition) | ||||||
5950 | continue; | ||||||
5951 | |||||||
5952 | // MSVC versions before 2015 don't export the move assignment operators | ||||||
5953 | // and move constructor, so don't attempt to import/export them if | ||||||
5954 | // we have a definition. | ||||||
5955 | auto *Ctor = dyn_cast<CXXConstructorDecl>(MD); | ||||||
5956 | if ((MD->isMoveAssignmentOperator() || | ||||||
5957 | (Ctor && Ctor->isMoveConstructor())) && | ||||||
5958 | !getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015)) | ||||||
5959 | continue; | ||||||
5960 | |||||||
5961 | // MSVC2015 doesn't export trivial defaulted x-tor but copy assign | ||||||
5962 | // operator is exported anyway. | ||||||
5963 | if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||||
5964 | (Ctor || isa<CXXDestructorDecl>(MD)) && MD->isTrivial()) | ||||||
5965 | continue; | ||||||
5966 | } | ||||||
5967 | } | ||||||
5968 | |||||||
5969 | // Don't apply dllimport attributes to static data members of class template | ||||||
5970 | // instantiations when the attribute is propagated from a derived class. | ||||||
5971 | if (VD && PropagatedImport) | ||||||
5972 | continue; | ||||||
5973 | |||||||
5974 | if (!cast<NamedDecl>(Member)->isExternallyVisible()) | ||||||
5975 | continue; | ||||||
5976 | |||||||
5977 | if (!getDLLAttr(Member)) { | ||||||
5978 | InheritableAttr *NewAttr = nullptr; | ||||||
5979 | |||||||
5980 | // Do not export/import inline function when -fno-dllexport-inlines is | ||||||
5981 | // passed. But add attribute for later local static var check. | ||||||
5982 | if (!getLangOpts().DllExportInlines && MD && MD->isInlined() && | ||||||
5983 | TSK != TSK_ExplicitInstantiationDeclaration && | ||||||
5984 | TSK != TSK_ExplicitInstantiationDefinition) { | ||||||
5985 | if (ClassExported) { | ||||||
5986 | NewAttr = ::new (getASTContext()) | ||||||
5987 | DLLExportStaticLocalAttr(getASTContext(), *ClassAttr); | ||||||
5988 | } else { | ||||||
5989 | NewAttr = ::new (getASTContext()) | ||||||
5990 | DLLImportStaticLocalAttr(getASTContext(), *ClassAttr); | ||||||
5991 | } | ||||||
5992 | } else { | ||||||
5993 | NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||||
5994 | } | ||||||
5995 | |||||||
5996 | NewAttr->setInherited(true); | ||||||
5997 | Member->addAttr(NewAttr); | ||||||
5998 | |||||||
5999 | if (MD) { | ||||||
6000 | // Propagate DLLAttr to friend re-declarations of MD that have already | ||||||
6001 | // been constructed. | ||||||
6002 | for (FunctionDecl *FD = MD->getMostRecentDecl(); FD; | ||||||
6003 | FD = FD->getPreviousDecl()) { | ||||||
6004 | if (FD->getFriendObjectKind() == Decl::FOK_None) | ||||||
6005 | continue; | ||||||
6006 | assert(!getDLLAttr(FD) &&((!getDLLAttr(FD) && "friend re-decl should not already have a DLLAttr" ) ? static_cast<void> (0) : __assert_fail ("!getDLLAttr(FD) && \"friend re-decl should not already have a DLLAttr\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6007, __PRETTY_FUNCTION__)) | ||||||
6007 | "friend re-decl should not already have a DLLAttr")((!getDLLAttr(FD) && "friend re-decl should not already have a DLLAttr" ) ? static_cast<void> (0) : __assert_fail ("!getDLLAttr(FD) && \"friend re-decl should not already have a DLLAttr\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6007, __PRETTY_FUNCTION__)); | ||||||
6008 | NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||||
6009 | NewAttr->setInherited(true); | ||||||
6010 | FD->addAttr(NewAttr); | ||||||
6011 | } | ||||||
6012 | } | ||||||
6013 | } | ||||||
6014 | } | ||||||
6015 | |||||||
6016 | if (ClassExported) | ||||||
6017 | DelayedDllExportClasses.push_back(Class); | ||||||
6018 | } | ||||||
6019 | |||||||
6020 | /// Perform propagation of DLL attributes from a derived class to a | ||||||
6021 | /// templated base class for MS compatibility. | ||||||
6022 | void Sema::propagateDLLAttrToBaseClassTemplate( | ||||||
6023 | CXXRecordDecl *Class, Attr *ClassAttr, | ||||||
6024 | ClassTemplateSpecializationDecl *BaseTemplateSpec, SourceLocation BaseLoc) { | ||||||
6025 | if (getDLLAttr( | ||||||
6026 | BaseTemplateSpec->getSpecializedTemplate()->getTemplatedDecl())) { | ||||||
6027 | // If the base class template has a DLL attribute, don't try to change it. | ||||||
6028 | return; | ||||||
6029 | } | ||||||
6030 | |||||||
6031 | auto TSK = BaseTemplateSpec->getSpecializationKind(); | ||||||
6032 | if (!getDLLAttr(BaseTemplateSpec) && | ||||||
6033 | (TSK == TSK_Undeclared || TSK == TSK_ExplicitInstantiationDeclaration || | ||||||
6034 | TSK == TSK_ImplicitInstantiation)) { | ||||||
6035 | // The template hasn't been instantiated yet (or it has, but only as an | ||||||
6036 | // explicit instantiation declaration or implicit instantiation, which means | ||||||
6037 | // we haven't codegenned any members yet), so propagate the attribute. | ||||||
6038 | auto *NewAttr = cast<InheritableAttr>(ClassAttr->clone(getASTContext())); | ||||||
6039 | NewAttr->setInherited(true); | ||||||
6040 | BaseTemplateSpec->addAttr(NewAttr); | ||||||
6041 | |||||||
6042 | // If this was an import, mark that we propagated it from a derived class to | ||||||
6043 | // a base class template specialization. | ||||||
6044 | if (auto *ImportAttr = dyn_cast<DLLImportAttr>(NewAttr)) | ||||||
6045 | ImportAttr->setPropagatedToBaseTemplate(); | ||||||
6046 | |||||||
6047 | // If the template is already instantiated, checkDLLAttributeRedeclaration() | ||||||
6048 | // needs to be run again to work see the new attribute. Otherwise this will | ||||||
6049 | // get run whenever the template is instantiated. | ||||||
6050 | if (TSK != TSK_Undeclared) | ||||||
6051 | checkClassLevelDLLAttribute(BaseTemplateSpec); | ||||||
6052 | |||||||
6053 | return; | ||||||
6054 | } | ||||||
6055 | |||||||
6056 | if (getDLLAttr(BaseTemplateSpec)) { | ||||||
6057 | // The template has already been specialized or instantiated with an | ||||||
6058 | // attribute, explicitly or through propagation. We should not try to change | ||||||
6059 | // it. | ||||||
6060 | return; | ||||||
6061 | } | ||||||
6062 | |||||||
6063 | // The template was previously instantiated or explicitly specialized without | ||||||
6064 | // a dll attribute, It's too late for us to add an attribute, so warn that | ||||||
6065 | // this is unsupported. | ||||||
6066 | Diag(BaseLoc, diag::warn_attribute_dll_instantiated_base_class) | ||||||
6067 | << BaseTemplateSpec->isExplicitSpecialization(); | ||||||
6068 | Diag(ClassAttr->getLocation(), diag::note_attribute); | ||||||
6069 | if (BaseTemplateSpec->isExplicitSpecialization()) { | ||||||
6070 | Diag(BaseTemplateSpec->getLocation(), | ||||||
6071 | diag::note_template_class_explicit_specialization_was_here) | ||||||
6072 | << BaseTemplateSpec; | ||||||
6073 | } else { | ||||||
6074 | Diag(BaseTemplateSpec->getPointOfInstantiation(), | ||||||
6075 | diag::note_template_class_instantiation_was_here) | ||||||
6076 | << BaseTemplateSpec; | ||||||
6077 | } | ||||||
6078 | } | ||||||
6079 | |||||||
6080 | static void DefineImplicitSpecialMember(Sema &S, CXXMethodDecl *MD, | ||||||
6081 | SourceLocation DefaultLoc) { | ||||||
6082 | switch (S.getSpecialMember(MD)) { | ||||||
6083 | case Sema::CXXDefaultConstructor: | ||||||
6084 | S.DefineImplicitDefaultConstructor(DefaultLoc, | ||||||
6085 | cast<CXXConstructorDecl>(MD)); | ||||||
6086 | break; | ||||||
6087 | case Sema::CXXCopyConstructor: | ||||||
6088 | S.DefineImplicitCopyConstructor(DefaultLoc, cast<CXXConstructorDecl>(MD)); | ||||||
6089 | break; | ||||||
6090 | case Sema::CXXCopyAssignment: | ||||||
6091 | S.DefineImplicitCopyAssignment(DefaultLoc, MD); | ||||||
6092 | break; | ||||||
6093 | case Sema::CXXDestructor: | ||||||
6094 | S.DefineImplicitDestructor(DefaultLoc, cast<CXXDestructorDecl>(MD)); | ||||||
6095 | break; | ||||||
6096 | case Sema::CXXMoveConstructor: | ||||||
6097 | S.DefineImplicitMoveConstructor(DefaultLoc, cast<CXXConstructorDecl>(MD)); | ||||||
6098 | break; | ||||||
6099 | case Sema::CXXMoveAssignment: | ||||||
6100 | S.DefineImplicitMoveAssignment(DefaultLoc, MD); | ||||||
6101 | break; | ||||||
6102 | case Sema::CXXInvalid: | ||||||
6103 | llvm_unreachable("Invalid special member.")::llvm::llvm_unreachable_internal("Invalid special member.", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6103); | ||||||
6104 | } | ||||||
6105 | } | ||||||
6106 | |||||||
6107 | /// Determine whether a type is permitted to be passed or returned in | ||||||
6108 | /// registers, per C++ [class.temporary]p3. | ||||||
6109 | static bool canPassInRegisters(Sema &S, CXXRecordDecl *D, | ||||||
6110 | TargetInfo::CallingConvKind CCK) { | ||||||
6111 | if (D->isDependentType() || D->isInvalidDecl()) | ||||||
6112 | return false; | ||||||
6113 | |||||||
6114 | // Clang <= 4 used the pre-C++11 rule, which ignores move operations. | ||||||
6115 | // The PS4 platform ABI follows the behavior of Clang 3.2. | ||||||
6116 | if (CCK == TargetInfo::CCK_ClangABI4OrPS4) | ||||||
6117 | return !D->hasNonTrivialDestructorForCall() && | ||||||
6118 | !D->hasNonTrivialCopyConstructorForCall(); | ||||||
6119 | |||||||
6120 | if (CCK == TargetInfo::CCK_MicrosoftWin64) { | ||||||
6121 | bool CopyCtorIsTrivial = false, CopyCtorIsTrivialForCall = false; | ||||||
6122 | bool DtorIsTrivialForCall = false; | ||||||
6123 | |||||||
6124 | // If a class has at least one non-deleted, trivial copy constructor, it | ||||||
6125 | // is passed according to the C ABI. Otherwise, it is passed indirectly. | ||||||
6126 | // | ||||||
6127 | // Note: This permits classes with non-trivial copy or move ctors to be | ||||||
6128 | // passed in registers, so long as they *also* have a trivial copy ctor, | ||||||
6129 | // which is non-conforming. | ||||||
6130 | if (D->needsImplicitCopyConstructor()) { | ||||||
6131 | if (!D->defaultedCopyConstructorIsDeleted()) { | ||||||
6132 | if (D->hasTrivialCopyConstructor()) | ||||||
6133 | CopyCtorIsTrivial = true; | ||||||
6134 | if (D->hasTrivialCopyConstructorForCall()) | ||||||
6135 | CopyCtorIsTrivialForCall = true; | ||||||
6136 | } | ||||||
6137 | } else { | ||||||
6138 | for (const CXXConstructorDecl *CD : D->ctors()) { | ||||||
6139 | if (CD->isCopyConstructor() && !CD->isDeleted()) { | ||||||
6140 | if (CD->isTrivial()) | ||||||
6141 | CopyCtorIsTrivial = true; | ||||||
6142 | if (CD->isTrivialForCall()) | ||||||
6143 | CopyCtorIsTrivialForCall = true; | ||||||
6144 | } | ||||||
6145 | } | ||||||
6146 | } | ||||||
6147 | |||||||
6148 | if (D->needsImplicitDestructor()) { | ||||||
6149 | if (!D->defaultedDestructorIsDeleted() && | ||||||
6150 | D->hasTrivialDestructorForCall()) | ||||||
6151 | DtorIsTrivialForCall = true; | ||||||
6152 | } else if (const auto *DD = D->getDestructor()) { | ||||||
6153 | if (!DD->isDeleted() && DD->isTrivialForCall()) | ||||||
6154 | DtorIsTrivialForCall = true; | ||||||
6155 | } | ||||||
6156 | |||||||
6157 | // If the copy ctor and dtor are both trivial-for-calls, pass direct. | ||||||
6158 | if (CopyCtorIsTrivialForCall && DtorIsTrivialForCall) | ||||||
6159 | return true; | ||||||
6160 | |||||||
6161 | // If a class has a destructor, we'd really like to pass it indirectly | ||||||
6162 | // because it allows us to elide copies. Unfortunately, MSVC makes that | ||||||
6163 | // impossible for small types, which it will pass in a single register or | ||||||
6164 | // stack slot. Most objects with dtors are large-ish, so handle that early. | ||||||
6165 | // We can't call out all large objects as being indirect because there are | ||||||
6166 | // multiple x64 calling conventions and the C++ ABI code shouldn't dictate | ||||||
6167 | // how we pass large POD types. | ||||||
6168 | |||||||
6169 | // Note: This permits small classes with nontrivial destructors to be | ||||||
6170 | // passed in registers, which is non-conforming. | ||||||
6171 | bool isAArch64 = S.Context.getTargetInfo().getTriple().isAArch64(); | ||||||
6172 | uint64_t TypeSize = isAArch64 ? 128 : 64; | ||||||
6173 | |||||||
6174 | if (CopyCtorIsTrivial && | ||||||
6175 | S.getASTContext().getTypeSize(D->getTypeForDecl()) <= TypeSize) | ||||||
6176 | return true; | ||||||
6177 | return false; | ||||||
6178 | } | ||||||
6179 | |||||||
6180 | // Per C++ [class.temporary]p3, the relevant condition is: | ||||||
6181 | // each copy constructor, move constructor, and destructor of X is | ||||||
6182 | // either trivial or deleted, and X has at least one non-deleted copy | ||||||
6183 | // or move constructor | ||||||
6184 | bool HasNonDeletedCopyOrMove = false; | ||||||
6185 | |||||||
6186 | if (D->needsImplicitCopyConstructor() && | ||||||
6187 | !D->defaultedCopyConstructorIsDeleted()) { | ||||||
6188 | if (!D->hasTrivialCopyConstructorForCall()) | ||||||
6189 | return false; | ||||||
6190 | HasNonDeletedCopyOrMove = true; | ||||||
6191 | } | ||||||
6192 | |||||||
6193 | if (S.getLangOpts().CPlusPlus11 && D->needsImplicitMoveConstructor() && | ||||||
6194 | !D->defaultedMoveConstructorIsDeleted()) { | ||||||
6195 | if (!D->hasTrivialMoveConstructorForCall()) | ||||||
6196 | return false; | ||||||
6197 | HasNonDeletedCopyOrMove = true; | ||||||
6198 | } | ||||||
6199 | |||||||
6200 | if (D->needsImplicitDestructor() && !D->defaultedDestructorIsDeleted() && | ||||||
6201 | !D->hasTrivialDestructorForCall()) | ||||||
6202 | return false; | ||||||
6203 | |||||||
6204 | for (const CXXMethodDecl *MD : D->methods()) { | ||||||
6205 | if (MD->isDeleted()) | ||||||
6206 | continue; | ||||||
6207 | |||||||
6208 | auto *CD = dyn_cast<CXXConstructorDecl>(MD); | ||||||
6209 | if (CD && CD->isCopyOrMoveConstructor()) | ||||||
6210 | HasNonDeletedCopyOrMove = true; | ||||||
6211 | else if (!isa<CXXDestructorDecl>(MD)) | ||||||
6212 | continue; | ||||||
6213 | |||||||
6214 | if (!MD->isTrivialForCall()) | ||||||
6215 | return false; | ||||||
6216 | } | ||||||
6217 | |||||||
6218 | return HasNonDeletedCopyOrMove; | ||||||
6219 | } | ||||||
6220 | |||||||
6221 | /// Perform semantic checks on a class definition that has been | ||||||
6222 | /// completing, introducing implicitly-declared members, checking for | ||||||
6223 | /// abstract types, etc. | ||||||
6224 | void Sema::CheckCompletedCXXClass(CXXRecordDecl *Record) { | ||||||
6225 | if (!Record) | ||||||
6226 | return; | ||||||
6227 | |||||||
6228 | if (Record->isAbstract() && !Record->isInvalidDecl()) { | ||||||
6229 | AbstractUsageInfo Info(*this, Record); | ||||||
6230 | CheckAbstractClassUsage(Info, Record); | ||||||
6231 | } | ||||||
6232 | |||||||
6233 | // If this is not an aggregate type and has no user-declared constructor, | ||||||
6234 | // complain about any non-static data members of reference or const scalar | ||||||
6235 | // type, since they will never get initializers. | ||||||
6236 | if (!Record->isInvalidDecl() && !Record->isDependentType() && | ||||||
6237 | !Record->isAggregate() && !Record->hasUserDeclaredConstructor() && | ||||||
6238 | !Record->isLambda()) { | ||||||
6239 | bool Complained = false; | ||||||
6240 | for (const auto *F : Record->fields()) { | ||||||
6241 | if (F->hasInClassInitializer() || F->isUnnamedBitfield()) | ||||||
6242 | continue; | ||||||
6243 | |||||||
6244 | if (F->getType()->isReferenceType() || | ||||||
6245 | (F->getType().isConstQualified() && F->getType()->isScalarType())) { | ||||||
6246 | if (!Complained) { | ||||||
6247 | Diag(Record->getLocation(), diag::warn_no_constructor_for_refconst) | ||||||
6248 | << Record->getTagKind() << Record; | ||||||
6249 | Complained = true; | ||||||
6250 | } | ||||||
6251 | |||||||
6252 | Diag(F->getLocation(), diag::note_refconst_member_not_initialized) | ||||||
6253 | << F->getType()->isReferenceType() | ||||||
6254 | << F->getDeclName(); | ||||||
6255 | } | ||||||
6256 | } | ||||||
6257 | } | ||||||
6258 | |||||||
6259 | if (Record->getIdentifier()) { | ||||||
6260 | // C++ [class.mem]p13: | ||||||
6261 | // If T is the name of a class, then each of the following shall have a | ||||||
6262 | // name different from T: | ||||||
6263 | // - every member of every anonymous union that is a member of class T. | ||||||
6264 | // | ||||||
6265 | // C++ [class.mem]p14: | ||||||
6266 | // In addition, if class T has a user-declared constructor (12.1), every | ||||||
6267 | // non-static data member of class T shall have a name different from T. | ||||||
6268 | DeclContext::lookup_result R = Record->lookup(Record->getDeclName()); | ||||||
6269 | for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; | ||||||
6270 | ++I) { | ||||||
6271 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||||
6272 | if (((isa<FieldDecl>(D) || isa<UnresolvedUsingValueDecl>(D)) && | ||||||
6273 | Record->hasUserDeclaredConstructor()) || | ||||||
6274 | isa<IndirectFieldDecl>(D)) { | ||||||
6275 | Diag((*I)->getLocation(), diag::err_member_name_of_class) | ||||||
6276 | << D->getDeclName(); | ||||||
6277 | break; | ||||||
6278 | } | ||||||
6279 | } | ||||||
6280 | } | ||||||
6281 | |||||||
6282 | // Warn if the class has virtual methods but non-virtual public destructor. | ||||||
6283 | if (Record->isPolymorphic() && !Record->isDependentType()) { | ||||||
6284 | CXXDestructorDecl *dtor = Record->getDestructor(); | ||||||
6285 | if ((!dtor || (!dtor->isVirtual() && dtor->getAccess() == AS_public)) && | ||||||
6286 | !Record->hasAttr<FinalAttr>()) | ||||||
6287 | Diag(dtor ? dtor->getLocation() : Record->getLocation(), | ||||||
6288 | diag::warn_non_virtual_dtor) << Context.getRecordType(Record); | ||||||
6289 | } | ||||||
6290 | |||||||
6291 | if (Record->isAbstract()) { | ||||||
6292 | if (FinalAttr *FA = Record->getAttr<FinalAttr>()) { | ||||||
6293 | Diag(Record->getLocation(), diag::warn_abstract_final_class) | ||||||
6294 | << FA->isSpelledAsSealed(); | ||||||
6295 | DiagnoseAbstractType(Record); | ||||||
6296 | } | ||||||
6297 | } | ||||||
6298 | |||||||
6299 | // Warn if the class has a final destructor but is not itself marked final. | ||||||
6300 | if (!Record->hasAttr<FinalAttr>()) { | ||||||
6301 | if (const CXXDestructorDecl *dtor = Record->getDestructor()) { | ||||||
6302 | if (const FinalAttr *FA = dtor->getAttr<FinalAttr>()) { | ||||||
6303 | Diag(FA->getLocation(), diag::warn_final_dtor_non_final_class) | ||||||
6304 | << FA->isSpelledAsSealed() | ||||||
6305 | << FixItHint::CreateInsertion( | ||||||
6306 | getLocForEndOfToken(Record->getLocation()), | ||||||
6307 | (FA->isSpelledAsSealed() ? " sealed" : " final")); | ||||||
6308 | Diag(Record->getLocation(), | ||||||
6309 | diag::note_final_dtor_non_final_class_silence) | ||||||
6310 | << Context.getRecordType(Record) << FA->isSpelledAsSealed(); | ||||||
6311 | } | ||||||
6312 | } | ||||||
6313 | } | ||||||
6314 | |||||||
6315 | // See if trivial_abi has to be dropped. | ||||||
6316 | if (Record->hasAttr<TrivialABIAttr>()) | ||||||
6317 | checkIllFormedTrivialABIStruct(*Record); | ||||||
6318 | |||||||
6319 | // Set HasTrivialSpecialMemberForCall if the record has attribute | ||||||
6320 | // "trivial_abi". | ||||||
6321 | bool HasTrivialABI = Record->hasAttr<TrivialABIAttr>(); | ||||||
6322 | |||||||
6323 | if (HasTrivialABI) | ||||||
6324 | Record->setHasTrivialSpecialMemberForCall(); | ||||||
6325 | |||||||
6326 | auto CompleteMemberFunction = [&](CXXMethodDecl *M) { | ||||||
6327 | // Check whether the explicitly-defaulted special members are valid. | ||||||
6328 | if (!M->isInvalidDecl() && M->isExplicitlyDefaulted()) | ||||||
6329 | CheckExplicitlyDefaultedSpecialMember(M); | ||||||
6330 | |||||||
6331 | // For an explicitly defaulted or deleted special member, we defer | ||||||
6332 | // determining triviality until the class is complete. That time is now! | ||||||
6333 | CXXSpecialMember CSM = getSpecialMember(M); | ||||||
6334 | if (!M->isImplicit() && !M->isUserProvided()) { | ||||||
6335 | if (CSM != CXXInvalid) { | ||||||
6336 | M->setTrivial(SpecialMemberIsTrivial(M, CSM)); | ||||||
6337 | // Inform the class that we've finished declaring this member. | ||||||
6338 | Record->finishedDefaultedOrDeletedMember(M); | ||||||
6339 | M->setTrivialForCall( | ||||||
6340 | HasTrivialABI || | ||||||
6341 | SpecialMemberIsTrivial(M, CSM, TAH_ConsiderTrivialABI)); | ||||||
6342 | Record->setTrivialForCallFlags(M); | ||||||
6343 | } | ||||||
6344 | } | ||||||
6345 | |||||||
6346 | // Set triviality for the purpose of calls if this is a user-provided | ||||||
6347 | // copy/move constructor or destructor. | ||||||
6348 | if ((CSM == CXXCopyConstructor || CSM == CXXMoveConstructor || | ||||||
6349 | CSM == CXXDestructor) && M->isUserProvided()) { | ||||||
6350 | M->setTrivialForCall(HasTrivialABI); | ||||||
6351 | Record->setTrivialForCallFlags(M); | ||||||
6352 | } | ||||||
6353 | |||||||
6354 | if (!M->isInvalidDecl() && M->isExplicitlyDefaulted() && | ||||||
6355 | M->hasAttr<DLLExportAttr>()) { | ||||||
6356 | if (getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||||
6357 | M->isTrivial() && | ||||||
6358 | (CSM == CXXDefaultConstructor || CSM == CXXCopyConstructor || | ||||||
6359 | CSM == CXXDestructor)) | ||||||
6360 | M->dropAttr<DLLExportAttr>(); | ||||||
6361 | |||||||
6362 | if (M->hasAttr<DLLExportAttr>()) { | ||||||
6363 | // Define after any fields with in-class initializers have been parsed. | ||||||
6364 | DelayedDllExportMemberFunctions.push_back(M); | ||||||
6365 | } | ||||||
6366 | } | ||||||
6367 | |||||||
6368 | // Define defaulted constexpr virtual functions that override a base class | ||||||
6369 | // function right away. | ||||||
6370 | // FIXME: We can defer doing this until the vtable is marked as used. | ||||||
6371 | if (M->isDefaulted() && M->isConstexpr() && M->size_overridden_methods()) | ||||||
6372 | DefineImplicitSpecialMember(*this, M, M->getLocation()); | ||||||
6373 | }; | ||||||
6374 | |||||||
6375 | bool HasMethodWithOverrideControl = false, | ||||||
6376 | HasOverridingMethodWithoutOverrideControl = false; | ||||||
6377 | if (!Record->isDependentType()) { | ||||||
6378 | // Check the destructor before any other member function. We need to | ||||||
6379 | // determine whether it's trivial in order to determine whether the claas | ||||||
6380 | // type is a literal type, which is a prerequisite for determining whether | ||||||
6381 | // other special member functions are valid and whether they're implicitly | ||||||
6382 | // 'constexpr'. | ||||||
6383 | if (CXXDestructorDecl *Dtor = Record->getDestructor()) | ||||||
6384 | CompleteMemberFunction(Dtor); | ||||||
6385 | |||||||
6386 | for (auto *M : Record->methods()) { | ||||||
6387 | // See if a method overloads virtual methods in a base | ||||||
6388 | // class without overriding any. | ||||||
6389 | if (!M->isStatic()) | ||||||
6390 | DiagnoseHiddenVirtualMethods(M); | ||||||
6391 | if (M->hasAttr<OverrideAttr>()) | ||||||
6392 | HasMethodWithOverrideControl = true; | ||||||
6393 | else if (M->size_overridden_methods() > 0) | ||||||
6394 | HasOverridingMethodWithoutOverrideControl = true; | ||||||
6395 | |||||||
6396 | if (!isa<CXXDestructorDecl>(M)) | ||||||
6397 | CompleteMemberFunction(M); | ||||||
6398 | } | ||||||
6399 | } | ||||||
6400 | |||||||
6401 | if (HasMethodWithOverrideControl && | ||||||
6402 | HasOverridingMethodWithoutOverrideControl) { | ||||||
6403 | // At least one method has the 'override' control declared. | ||||||
6404 | // Diagnose all other overridden methods which do not have 'override' specified on them. | ||||||
6405 | for (auto *M : Record->methods()) | ||||||
6406 | DiagnoseAbsenceOfOverrideControl(M); | ||||||
6407 | } | ||||||
6408 | |||||||
6409 | // ms_struct is a request to use the same ABI rules as MSVC. Check | ||||||
6410 | // whether this class uses any C++ features that are implemented | ||||||
6411 | // completely differently in MSVC, and if so, emit a diagnostic. | ||||||
6412 | // That diagnostic defaults to an error, but we allow projects to | ||||||
6413 | // map it down to a warning (or ignore it). It's a fairly common | ||||||
6414 | // practice among users of the ms_struct pragma to mass-annotate | ||||||
6415 | // headers, sweeping up a bunch of types that the project doesn't | ||||||
6416 | // really rely on MSVC-compatible layout for. We must therefore | ||||||
6417 | // support "ms_struct except for C++ stuff" as a secondary ABI. | ||||||
6418 | if (Record->isMsStruct(Context) && | ||||||
6419 | (Record->isPolymorphic() || Record->getNumBases())) { | ||||||
6420 | Diag(Record->getLocation(), diag::warn_cxx_ms_struct); | ||||||
6421 | } | ||||||
6422 | |||||||
6423 | checkClassLevelDLLAttribute(Record); | ||||||
6424 | checkClassLevelCodeSegAttribute(Record); | ||||||
6425 | |||||||
6426 | bool ClangABICompat4 = | ||||||
6427 | Context.getLangOpts().getClangABICompat() <= LangOptions::ClangABI::Ver4; | ||||||
6428 | TargetInfo::CallingConvKind CCK = | ||||||
6429 | Context.getTargetInfo().getCallingConvKind(ClangABICompat4); | ||||||
6430 | bool CanPass = canPassInRegisters(*this, Record, CCK); | ||||||
6431 | |||||||
6432 | // Do not change ArgPassingRestrictions if it has already been set to | ||||||
6433 | // APK_CanNeverPassInRegs. | ||||||
6434 | if (Record->getArgPassingRestrictions() != RecordDecl::APK_CanNeverPassInRegs) | ||||||
6435 | Record->setArgPassingRestrictions(CanPass | ||||||
6436 | ? RecordDecl::APK_CanPassInRegs | ||||||
6437 | : RecordDecl::APK_CannotPassInRegs); | ||||||
6438 | |||||||
6439 | // If canPassInRegisters returns true despite the record having a non-trivial | ||||||
6440 | // destructor, the record is destructed in the callee. This happens only when | ||||||
6441 | // the record or one of its subobjects has a field annotated with trivial_abi | ||||||
6442 | // or a field qualified with ObjC __strong/__weak. | ||||||
6443 | if (Context.getTargetInfo().getCXXABI().areArgsDestroyedLeftToRightInCallee()) | ||||||
6444 | Record->setParamDestroyedInCallee(true); | ||||||
6445 | else if (Record->hasNonTrivialDestructor()) | ||||||
6446 | Record->setParamDestroyedInCallee(CanPass); | ||||||
6447 | |||||||
6448 | if (getLangOpts().ForceEmitVTables) { | ||||||
6449 | // If we want to emit all the vtables, we need to mark it as used. This | ||||||
6450 | // is especially required for cases like vtable assumption loads. | ||||||
6451 | MarkVTableUsed(Record->getInnerLocStart(), Record); | ||||||
6452 | } | ||||||
6453 | } | ||||||
6454 | |||||||
6455 | /// Look up the special member function that would be called by a special | ||||||
6456 | /// member function for a subobject of class type. | ||||||
6457 | /// | ||||||
6458 | /// \param Class The class type of the subobject. | ||||||
6459 | /// \param CSM The kind of special member function. | ||||||
6460 | /// \param FieldQuals If the subobject is a field, its cv-qualifiers. | ||||||
6461 | /// \param ConstRHS True if this is a copy operation with a const object | ||||||
6462 | /// on its RHS, that is, if the argument to the outer special member | ||||||
6463 | /// function is 'const' and this is not a field marked 'mutable'. | ||||||
6464 | static Sema::SpecialMemberOverloadResult lookupCallFromSpecialMember( | ||||||
6465 | Sema &S, CXXRecordDecl *Class, Sema::CXXSpecialMember CSM, | ||||||
6466 | unsigned FieldQuals, bool ConstRHS) { | ||||||
6467 | unsigned LHSQuals = 0; | ||||||
6468 | if (CSM == Sema::CXXCopyAssignment || CSM == Sema::CXXMoveAssignment) | ||||||
6469 | LHSQuals = FieldQuals; | ||||||
6470 | |||||||
6471 | unsigned RHSQuals = FieldQuals; | ||||||
6472 | if (CSM == Sema::CXXDefaultConstructor || CSM == Sema::CXXDestructor) | ||||||
6473 | RHSQuals = 0; | ||||||
6474 | else if (ConstRHS) | ||||||
6475 | RHSQuals |= Qualifiers::Const; | ||||||
6476 | |||||||
6477 | return S.LookupSpecialMember(Class, CSM, | ||||||
6478 | RHSQuals & Qualifiers::Const, | ||||||
6479 | RHSQuals & Qualifiers::Volatile, | ||||||
6480 | false, | ||||||
6481 | LHSQuals & Qualifiers::Const, | ||||||
6482 | LHSQuals & Qualifiers::Volatile); | ||||||
6483 | } | ||||||
6484 | |||||||
6485 | class Sema::InheritedConstructorInfo { | ||||||
6486 | Sema &S; | ||||||
6487 | SourceLocation UseLoc; | ||||||
6488 | |||||||
6489 | /// A mapping from the base classes through which the constructor was | ||||||
6490 | /// inherited to the using shadow declaration in that base class (or a null | ||||||
6491 | /// pointer if the constructor was declared in that base class). | ||||||
6492 | llvm::DenseMap<CXXRecordDecl *, ConstructorUsingShadowDecl *> | ||||||
6493 | InheritedFromBases; | ||||||
6494 | |||||||
6495 | public: | ||||||
6496 | InheritedConstructorInfo(Sema &S, SourceLocation UseLoc, | ||||||
6497 | ConstructorUsingShadowDecl *Shadow) | ||||||
6498 | : S(S), UseLoc(UseLoc) { | ||||||
6499 | bool DiagnosedMultipleConstructedBases = false; | ||||||
6500 | CXXRecordDecl *ConstructedBase = nullptr; | ||||||
6501 | UsingDecl *ConstructedBaseUsing = nullptr; | ||||||
6502 | |||||||
6503 | // Find the set of such base class subobjects and check that there's a | ||||||
6504 | // unique constructed subobject. | ||||||
6505 | for (auto *D : Shadow->redecls()) { | ||||||
6506 | auto *DShadow = cast<ConstructorUsingShadowDecl>(D); | ||||||
6507 | auto *DNominatedBase = DShadow->getNominatedBaseClass(); | ||||||
6508 | auto *DConstructedBase = DShadow->getConstructedBaseClass(); | ||||||
6509 | |||||||
6510 | InheritedFromBases.insert( | ||||||
6511 | std::make_pair(DNominatedBase->getCanonicalDecl(), | ||||||
6512 | DShadow->getNominatedBaseClassShadowDecl())); | ||||||
6513 | if (DShadow->constructsVirtualBase()) | ||||||
6514 | InheritedFromBases.insert( | ||||||
6515 | std::make_pair(DConstructedBase->getCanonicalDecl(), | ||||||
6516 | DShadow->getConstructedBaseClassShadowDecl())); | ||||||
6517 | else | ||||||
6518 | assert(DNominatedBase == DConstructedBase)((DNominatedBase == DConstructedBase) ? static_cast<void> (0) : __assert_fail ("DNominatedBase == DConstructedBase", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6518, __PRETTY_FUNCTION__)); | ||||||
6519 | |||||||
6520 | // [class.inhctor.init]p2: | ||||||
6521 | // If the constructor was inherited from multiple base class subobjects | ||||||
6522 | // of type B, the program is ill-formed. | ||||||
6523 | if (!ConstructedBase) { | ||||||
6524 | ConstructedBase = DConstructedBase; | ||||||
6525 | ConstructedBaseUsing = D->getUsingDecl(); | ||||||
6526 | } else if (ConstructedBase != DConstructedBase && | ||||||
6527 | !Shadow->isInvalidDecl()) { | ||||||
6528 | if (!DiagnosedMultipleConstructedBases) { | ||||||
6529 | S.Diag(UseLoc, diag::err_ambiguous_inherited_constructor) | ||||||
6530 | << Shadow->getTargetDecl(); | ||||||
6531 | S.Diag(ConstructedBaseUsing->getLocation(), | ||||||
6532 | diag::note_ambiguous_inherited_constructor_using) | ||||||
6533 | << ConstructedBase; | ||||||
6534 | DiagnosedMultipleConstructedBases = true; | ||||||
6535 | } | ||||||
6536 | S.Diag(D->getUsingDecl()->getLocation(), | ||||||
6537 | diag::note_ambiguous_inherited_constructor_using) | ||||||
6538 | << DConstructedBase; | ||||||
6539 | } | ||||||
6540 | } | ||||||
6541 | |||||||
6542 | if (DiagnosedMultipleConstructedBases) | ||||||
6543 | Shadow->setInvalidDecl(); | ||||||
6544 | } | ||||||
6545 | |||||||
6546 | /// Find the constructor to use for inherited construction of a base class, | ||||||
6547 | /// and whether that base class constructor inherits the constructor from a | ||||||
6548 | /// virtual base class (in which case it won't actually invoke it). | ||||||
6549 | std::pair<CXXConstructorDecl *, bool> | ||||||
6550 | findConstructorForBase(CXXRecordDecl *Base, CXXConstructorDecl *Ctor) const { | ||||||
6551 | auto It = InheritedFromBases.find(Base->getCanonicalDecl()); | ||||||
6552 | if (It == InheritedFromBases.end()) | ||||||
6553 | return std::make_pair(nullptr, false); | ||||||
6554 | |||||||
6555 | // This is an intermediary class. | ||||||
6556 | if (It->second) | ||||||
6557 | return std::make_pair( | ||||||
6558 | S.findInheritingConstructor(UseLoc, Ctor, It->second), | ||||||
6559 | It->second->constructsVirtualBase()); | ||||||
6560 | |||||||
6561 | // This is the base class from which the constructor was inherited. | ||||||
6562 | return std::make_pair(Ctor, false); | ||||||
6563 | } | ||||||
6564 | }; | ||||||
6565 | |||||||
6566 | /// Is the special member function which would be selected to perform the | ||||||
6567 | /// specified operation on the specified class type a constexpr constructor? | ||||||
6568 | static bool | ||||||
6569 | specialMemberIsConstexpr(Sema &S, CXXRecordDecl *ClassDecl, | ||||||
6570 | Sema::CXXSpecialMember CSM, unsigned Quals, | ||||||
6571 | bool ConstRHS, | ||||||
6572 | CXXConstructorDecl *InheritedCtor = nullptr, | ||||||
6573 | Sema::InheritedConstructorInfo *Inherited = nullptr) { | ||||||
6574 | // If we're inheriting a constructor, see if we need to call it for this base | ||||||
6575 | // class. | ||||||
6576 | if (InheritedCtor) { | ||||||
6577 | assert(CSM == Sema::CXXDefaultConstructor)((CSM == Sema::CXXDefaultConstructor) ? static_cast<void> (0) : __assert_fail ("CSM == Sema::CXXDefaultConstructor", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6577, __PRETTY_FUNCTION__)); | ||||||
6578 | auto BaseCtor = | ||||||
6579 | Inherited->findConstructorForBase(ClassDecl, InheritedCtor).first; | ||||||
6580 | if (BaseCtor) | ||||||
6581 | return BaseCtor->isConstexpr(); | ||||||
6582 | } | ||||||
6583 | |||||||
6584 | if (CSM == Sema::CXXDefaultConstructor) | ||||||
6585 | return ClassDecl->hasConstexprDefaultConstructor(); | ||||||
6586 | if (CSM == Sema::CXXDestructor) | ||||||
6587 | return ClassDecl->hasConstexprDestructor(); | ||||||
6588 | |||||||
6589 | Sema::SpecialMemberOverloadResult SMOR = | ||||||
6590 | lookupCallFromSpecialMember(S, ClassDecl, CSM, Quals, ConstRHS); | ||||||
6591 | if (!SMOR.getMethod()) | ||||||
6592 | // A constructor we wouldn't select can't be "involved in initializing" | ||||||
6593 | // anything. | ||||||
6594 | return true; | ||||||
6595 | return SMOR.getMethod()->isConstexpr(); | ||||||
6596 | } | ||||||
6597 | |||||||
6598 | /// Determine whether the specified special member function would be constexpr | ||||||
6599 | /// if it were implicitly defined. | ||||||
6600 | static bool defaultedSpecialMemberIsConstexpr( | ||||||
6601 | Sema &S, CXXRecordDecl *ClassDecl, Sema::CXXSpecialMember CSM, | ||||||
6602 | bool ConstArg, CXXConstructorDecl *InheritedCtor = nullptr, | ||||||
6603 | Sema::InheritedConstructorInfo *Inherited = nullptr) { | ||||||
6604 | if (!S.getLangOpts().CPlusPlus11) | ||||||
6605 | return false; | ||||||
6606 | |||||||
6607 | // C++11 [dcl.constexpr]p4: | ||||||
6608 | // In the definition of a constexpr constructor [...] | ||||||
6609 | bool Ctor = true; | ||||||
6610 | switch (CSM) { | ||||||
6611 | case Sema::CXXDefaultConstructor: | ||||||
6612 | if (Inherited) | ||||||
6613 | break; | ||||||
6614 | // Since default constructor lookup is essentially trivial (and cannot | ||||||
6615 | // involve, for instance, template instantiation), we compute whether a | ||||||
6616 | // defaulted default constructor is constexpr directly within CXXRecordDecl. | ||||||
6617 | // | ||||||
6618 | // This is important for performance; we need to know whether the default | ||||||
6619 | // constructor is constexpr to determine whether the type is a literal type. | ||||||
6620 | return ClassDecl->defaultedDefaultConstructorIsConstexpr(); | ||||||
6621 | |||||||
6622 | case Sema::CXXCopyConstructor: | ||||||
6623 | case Sema::CXXMoveConstructor: | ||||||
6624 | // For copy or move constructors, we need to perform overload resolution. | ||||||
6625 | break; | ||||||
6626 | |||||||
6627 | case Sema::CXXCopyAssignment: | ||||||
6628 | case Sema::CXXMoveAssignment: | ||||||
6629 | if (!S.getLangOpts().CPlusPlus14) | ||||||
6630 | return false; | ||||||
6631 | // In C++1y, we need to perform overload resolution. | ||||||
6632 | Ctor = false; | ||||||
6633 | break; | ||||||
6634 | |||||||
6635 | case Sema::CXXDestructor: | ||||||
6636 | return ClassDecl->defaultedDestructorIsConstexpr(); | ||||||
6637 | |||||||
6638 | case Sema::CXXInvalid: | ||||||
6639 | return false; | ||||||
6640 | } | ||||||
6641 | |||||||
6642 | // -- if the class is a non-empty union, or for each non-empty anonymous | ||||||
6643 | // union member of a non-union class, exactly one non-static data member | ||||||
6644 | // shall be initialized; [DR1359] | ||||||
6645 | // | ||||||
6646 | // If we squint, this is guaranteed, since exactly one non-static data member | ||||||
6647 | // will be initialized (if the constructor isn't deleted), we just don't know | ||||||
6648 | // which one. | ||||||
6649 | if (Ctor && ClassDecl->isUnion()) | ||||||
6650 | return CSM == Sema::CXXDefaultConstructor | ||||||
6651 | ? ClassDecl->hasInClassInitializer() || | ||||||
6652 | !ClassDecl->hasVariantMembers() | ||||||
6653 | : true; | ||||||
6654 | |||||||
6655 | // -- the class shall not have any virtual base classes; | ||||||
6656 | if (Ctor && ClassDecl->getNumVBases()) | ||||||
6657 | return false; | ||||||
6658 | |||||||
6659 | // C++1y [class.copy]p26: | ||||||
6660 | // -- [the class] is a literal type, and | ||||||
6661 | if (!Ctor && !ClassDecl->isLiteral()) | ||||||
6662 | return false; | ||||||
6663 | |||||||
6664 | // -- every constructor involved in initializing [...] base class | ||||||
6665 | // sub-objects shall be a constexpr constructor; | ||||||
6666 | // -- the assignment operator selected to copy/move each direct base | ||||||
6667 | // class is a constexpr function, and | ||||||
6668 | for (const auto &B : ClassDecl->bases()) { | ||||||
6669 | const RecordType *BaseType = B.getType()->getAs<RecordType>(); | ||||||
6670 | if (!BaseType) continue; | ||||||
6671 | |||||||
6672 | CXXRecordDecl *BaseClassDecl = cast<CXXRecordDecl>(BaseType->getDecl()); | ||||||
6673 | if (!specialMemberIsConstexpr(S, BaseClassDecl, CSM, 0, ConstArg, | ||||||
6674 | InheritedCtor, Inherited)) | ||||||
6675 | return false; | ||||||
6676 | } | ||||||
6677 | |||||||
6678 | // -- every constructor involved in initializing non-static data members | ||||||
6679 | // [...] shall be a constexpr constructor; | ||||||
6680 | // -- every non-static data member and base class sub-object shall be | ||||||
6681 | // initialized | ||||||
6682 | // -- for each non-static data member of X that is of class type (or array | ||||||
6683 | // thereof), the assignment operator selected to copy/move that member is | ||||||
6684 | // a constexpr function | ||||||
6685 | for (const auto *F : ClassDecl->fields()) { | ||||||
6686 | if (F->isInvalidDecl()) | ||||||
6687 | continue; | ||||||
6688 | if (CSM == Sema::CXXDefaultConstructor && F->hasInClassInitializer()) | ||||||
6689 | continue; | ||||||
6690 | QualType BaseType = S.Context.getBaseElementType(F->getType()); | ||||||
6691 | if (const RecordType *RecordTy = BaseType->getAs<RecordType>()) { | ||||||
6692 | CXXRecordDecl *FieldRecDecl = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||||
6693 | if (!specialMemberIsConstexpr(S, FieldRecDecl, CSM, | ||||||
6694 | BaseType.getCVRQualifiers(), | ||||||
6695 | ConstArg && !F->isMutable())) | ||||||
6696 | return false; | ||||||
6697 | } else if (CSM == Sema::CXXDefaultConstructor) { | ||||||
6698 | return false; | ||||||
6699 | } | ||||||
6700 | } | ||||||
6701 | |||||||
6702 | // All OK, it's constexpr! | ||||||
6703 | return true; | ||||||
6704 | } | ||||||
6705 | |||||||
6706 | static Sema::ImplicitExceptionSpecification | ||||||
6707 | ComputeDefaultedSpecialMemberExceptionSpec( | ||||||
6708 | Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||||
6709 | Sema::InheritedConstructorInfo *ICI); | ||||||
6710 | |||||||
6711 | static Sema::ImplicitExceptionSpecification | ||||||
6712 | computeImplicitExceptionSpec(Sema &S, SourceLocation Loc, CXXMethodDecl *MD) { | ||||||
6713 | auto CSM = S.getSpecialMember(MD); | ||||||
6714 | if (CSM != Sema::CXXInvalid) | ||||||
6715 | return ComputeDefaultedSpecialMemberExceptionSpec(S, Loc, MD, CSM, nullptr); | ||||||
6716 | |||||||
6717 | auto *CD = cast<CXXConstructorDecl>(MD); | ||||||
6718 | assert(CD->getInheritedConstructor() &&((CD->getInheritedConstructor() && "only special members have implicit exception specs" ) ? static_cast<void> (0) : __assert_fail ("CD->getInheritedConstructor() && \"only special members have implicit exception specs\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6719, __PRETTY_FUNCTION__)) | ||||||
6719 | "only special members have implicit exception specs")((CD->getInheritedConstructor() && "only special members have implicit exception specs" ) ? static_cast<void> (0) : __assert_fail ("CD->getInheritedConstructor() && \"only special members have implicit exception specs\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6719, __PRETTY_FUNCTION__)); | ||||||
6720 | Sema::InheritedConstructorInfo ICI( | ||||||
6721 | S, Loc, CD->getInheritedConstructor().getShadowDecl()); | ||||||
6722 | return ComputeDefaultedSpecialMemberExceptionSpec( | ||||||
6723 | S, Loc, CD, Sema::CXXDefaultConstructor, &ICI); | ||||||
6724 | } | ||||||
6725 | |||||||
6726 | static FunctionProtoType::ExtProtoInfo getImplicitMethodEPI(Sema &S, | ||||||
6727 | CXXMethodDecl *MD) { | ||||||
6728 | FunctionProtoType::ExtProtoInfo EPI; | ||||||
6729 | |||||||
6730 | // Build an exception specification pointing back at this member. | ||||||
6731 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||
6732 | EPI.ExceptionSpec.SourceDecl = MD; | ||||||
6733 | |||||||
6734 | // Set the calling convention to the default for C++ instance methods. | ||||||
6735 | EPI.ExtInfo = EPI.ExtInfo.withCallingConv( | ||||||
6736 | S.Context.getDefaultCallingConvention(/*IsVariadic=*/false, | ||||||
6737 | /*IsCXXMethod=*/true)); | ||||||
6738 | return EPI; | ||||||
6739 | } | ||||||
6740 | |||||||
6741 | void Sema::EvaluateImplicitExceptionSpec(SourceLocation Loc, CXXMethodDecl *MD) { | ||||||
6742 | const FunctionProtoType *FPT = MD->getType()->castAs<FunctionProtoType>(); | ||||||
6743 | if (FPT->getExceptionSpecType() != EST_Unevaluated) | ||||||
6744 | return; | ||||||
6745 | |||||||
6746 | // Evaluate the exception specification. | ||||||
6747 | auto IES = computeImplicitExceptionSpec(*this, Loc, MD); | ||||||
6748 | auto ESI = IES.getExceptionSpec(); | ||||||
6749 | |||||||
6750 | // Update the type of the special member to use it. | ||||||
6751 | UpdateExceptionSpec(MD, ESI); | ||||||
6752 | |||||||
6753 | // A user-provided destructor can be defined outside the class. When that | ||||||
6754 | // happens, be sure to update the exception specification on both | ||||||
6755 | // declarations. | ||||||
6756 | const FunctionProtoType *CanonicalFPT = | ||||||
6757 | MD->getCanonicalDecl()->getType()->castAs<FunctionProtoType>(); | ||||||
6758 | if (CanonicalFPT->getExceptionSpecType() == EST_Unevaluated) | ||||||
6759 | UpdateExceptionSpec(MD->getCanonicalDecl(), ESI); | ||||||
6760 | } | ||||||
6761 | |||||||
6762 | void Sema::CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD) { | ||||||
6763 | CXXRecordDecl *RD = MD->getParent(); | ||||||
6764 | CXXSpecialMember CSM = getSpecialMember(MD); | ||||||
6765 | |||||||
6766 | assert(MD->isExplicitlyDefaulted() && CSM != CXXInvalid &&((MD->isExplicitlyDefaulted() && CSM != CXXInvalid && "not an explicitly-defaulted special member") ? static_cast <void> (0) : __assert_fail ("MD->isExplicitlyDefaulted() && CSM != CXXInvalid && \"not an explicitly-defaulted special member\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6767, __PRETTY_FUNCTION__)) | ||||||
6767 | "not an explicitly-defaulted special member")((MD->isExplicitlyDefaulted() && CSM != CXXInvalid && "not an explicitly-defaulted special member") ? static_cast <void> (0) : __assert_fail ("MD->isExplicitlyDefaulted() && CSM != CXXInvalid && \"not an explicitly-defaulted special member\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6767, __PRETTY_FUNCTION__)); | ||||||
6768 | |||||||
6769 | // Whether this was the first-declared instance of the constructor. | ||||||
6770 | // This affects whether we implicitly add an exception spec and constexpr. | ||||||
6771 | bool First = MD == MD->getCanonicalDecl(); | ||||||
6772 | |||||||
6773 | bool HadError = false; | ||||||
6774 | |||||||
6775 | // C++11 [dcl.fct.def.default]p1: | ||||||
6776 | // A function that is explicitly defaulted shall | ||||||
6777 | // -- be a special member function (checked elsewhere), | ||||||
6778 | // -- have the same type (except for ref-qualifiers, and except that a | ||||||
6779 | // copy operation can take a non-const reference) as an implicit | ||||||
6780 | // declaration, and | ||||||
6781 | // -- not have default arguments. | ||||||
6782 | // C++2a changes the second bullet to instead delete the function if it's | ||||||
6783 | // defaulted on its first declaration, unless it's "an assignment operator, | ||||||
6784 | // and its return type differs or its parameter type is not a reference". | ||||||
6785 | bool DeleteOnTypeMismatch = getLangOpts().CPlusPlus2a && First; | ||||||
6786 | bool ShouldDeleteForTypeMismatch = false; | ||||||
6787 | unsigned ExpectedParams = 1; | ||||||
6788 | if (CSM == CXXDefaultConstructor || CSM == CXXDestructor) | ||||||
6789 | ExpectedParams = 0; | ||||||
6790 | if (MD->getNumParams() != ExpectedParams) { | ||||||
6791 | // This checks for default arguments: a copy or move constructor with a | ||||||
6792 | // default argument is classified as a default constructor, and assignment | ||||||
6793 | // operations and destructors can't have default arguments. | ||||||
6794 | Diag(MD->getLocation(), diag::err_defaulted_special_member_params) | ||||||
6795 | << CSM << MD->getSourceRange(); | ||||||
6796 | HadError = true; | ||||||
6797 | } else if (MD->isVariadic()) { | ||||||
6798 | if (DeleteOnTypeMismatch) | ||||||
6799 | ShouldDeleteForTypeMismatch = true; | ||||||
6800 | else { | ||||||
6801 | Diag(MD->getLocation(), diag::err_defaulted_special_member_variadic) | ||||||
6802 | << CSM << MD->getSourceRange(); | ||||||
6803 | HadError = true; | ||||||
6804 | } | ||||||
6805 | } | ||||||
6806 | |||||||
6807 | const FunctionProtoType *Type = MD->getType()->getAs<FunctionProtoType>(); | ||||||
6808 | |||||||
6809 | bool CanHaveConstParam = false; | ||||||
6810 | if (CSM == CXXCopyConstructor) | ||||||
6811 | CanHaveConstParam = RD->implicitCopyConstructorHasConstParam(); | ||||||
6812 | else if (CSM == CXXCopyAssignment) | ||||||
6813 | CanHaveConstParam = RD->implicitCopyAssignmentHasConstParam(); | ||||||
6814 | |||||||
6815 | QualType ReturnType = Context.VoidTy; | ||||||
6816 | if (CSM == CXXCopyAssignment || CSM == CXXMoveAssignment) { | ||||||
6817 | // Check for return type matching. | ||||||
6818 | ReturnType = Type->getReturnType(); | ||||||
6819 | |||||||
6820 | QualType DeclType = Context.getTypeDeclType(RD); | ||||||
6821 | DeclType = Context.getAddrSpaceQualType(DeclType, MD->getMethodQualifiers().getAddressSpace()); | ||||||
6822 | QualType ExpectedReturnType = Context.getLValueReferenceType(DeclType); | ||||||
6823 | |||||||
6824 | if (!Context.hasSameType(ReturnType, ExpectedReturnType)) { | ||||||
6825 | Diag(MD->getLocation(), diag::err_defaulted_special_member_return_type) | ||||||
6826 | << (CSM == CXXMoveAssignment) << ExpectedReturnType; | ||||||
6827 | HadError = true; | ||||||
6828 | } | ||||||
6829 | |||||||
6830 | // A defaulted special member cannot have cv-qualifiers. | ||||||
6831 | if (Type->getMethodQuals().hasConst() || Type->getMethodQuals().hasVolatile()) { | ||||||
6832 | if (DeleteOnTypeMismatch) | ||||||
6833 | ShouldDeleteForTypeMismatch = true; | ||||||
6834 | else { | ||||||
6835 | Diag(MD->getLocation(), diag::err_defaulted_special_member_quals) | ||||||
6836 | << (CSM == CXXMoveAssignment) << getLangOpts().CPlusPlus14; | ||||||
6837 | HadError = true; | ||||||
6838 | } | ||||||
6839 | } | ||||||
6840 | } | ||||||
6841 | |||||||
6842 | // Check for parameter type matching. | ||||||
6843 | QualType ArgType = ExpectedParams ? Type->getParamType(0) : QualType(); | ||||||
6844 | bool HasConstParam = false; | ||||||
6845 | if (ExpectedParams && ArgType->isReferenceType()) { | ||||||
6846 | // Argument must be reference to possibly-const T. | ||||||
6847 | QualType ReferentType = ArgType->getPointeeType(); | ||||||
6848 | HasConstParam = ReferentType.isConstQualified(); | ||||||
6849 | |||||||
6850 | if (ReferentType.isVolatileQualified()) { | ||||||
6851 | if (DeleteOnTypeMismatch) | ||||||
6852 | ShouldDeleteForTypeMismatch = true; | ||||||
6853 | else { | ||||||
6854 | Diag(MD->getLocation(), | ||||||
6855 | diag::err_defaulted_special_member_volatile_param) << CSM; | ||||||
6856 | HadError = true; | ||||||
6857 | } | ||||||
6858 | } | ||||||
6859 | |||||||
6860 | if (HasConstParam && !CanHaveConstParam) { | ||||||
6861 | if (DeleteOnTypeMismatch) | ||||||
6862 | ShouldDeleteForTypeMismatch = true; | ||||||
6863 | else if (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment) { | ||||||
6864 | Diag(MD->getLocation(), | ||||||
6865 | diag::err_defaulted_special_member_copy_const_param) | ||||||
6866 | << (CSM == CXXCopyAssignment); | ||||||
6867 | // FIXME: Explain why this special member can't be const. | ||||||
6868 | HadError = true; | ||||||
6869 | } else { | ||||||
6870 | Diag(MD->getLocation(), | ||||||
6871 | diag::err_defaulted_special_member_move_const_param) | ||||||
6872 | << (CSM == CXXMoveAssignment); | ||||||
6873 | HadError = true; | ||||||
6874 | } | ||||||
6875 | } | ||||||
6876 | } else if (ExpectedParams) { | ||||||
6877 | // A copy assignment operator can take its argument by value, but a | ||||||
6878 | // defaulted one cannot. | ||||||
6879 | assert(CSM == CXXCopyAssignment && "unexpected non-ref argument")((CSM == CXXCopyAssignment && "unexpected non-ref argument" ) ? static_cast<void> (0) : __assert_fail ("CSM == CXXCopyAssignment && \"unexpected non-ref argument\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6879, __PRETTY_FUNCTION__)); | ||||||
6880 | Diag(MD->getLocation(), diag::err_defaulted_copy_assign_not_ref); | ||||||
6881 | HadError = true; | ||||||
6882 | } | ||||||
6883 | |||||||
6884 | // C++11 [dcl.fct.def.default]p2: | ||||||
6885 | // An explicitly-defaulted function may be declared constexpr only if it | ||||||
6886 | // would have been implicitly declared as constexpr, | ||||||
6887 | // Do not apply this rule to members of class templates, since core issue 1358 | ||||||
6888 | // makes such functions always instantiate to constexpr functions. For | ||||||
6889 | // functions which cannot be constexpr (for non-constructors in C++11 and for | ||||||
6890 | // destructors in C++14 and C++17), this is checked elsewhere. | ||||||
6891 | // | ||||||
6892 | // FIXME: This should not apply if the member is deleted. | ||||||
6893 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, RD, CSM, | ||||||
6894 | HasConstParam); | ||||||
6895 | if ((getLangOpts().CPlusPlus2a || | ||||||
6896 | (getLangOpts().CPlusPlus14 ? !isa<CXXDestructorDecl>(MD) | ||||||
6897 | : isa<CXXConstructorDecl>(MD))) && | ||||||
6898 | MD->isConstexpr() && !Constexpr && | ||||||
6899 | MD->getTemplatedKind() == FunctionDecl::TK_NonTemplate) { | ||||||
6900 | Diag(MD->getBeginLoc(), MD->isConsteval() | ||||||
6901 | ? diag::err_incorrect_defaulted_consteval | ||||||
6902 | : diag::err_incorrect_defaulted_constexpr) | ||||||
6903 | << CSM; | ||||||
6904 | // FIXME: Explain why the special member can't be constexpr. | ||||||
6905 | HadError = true; | ||||||
6906 | } | ||||||
6907 | |||||||
6908 | if (First) { | ||||||
6909 | // C++2a [dcl.fct.def.default]p3: | ||||||
6910 | // If a function is explicitly defaulted on its first declaration, it is | ||||||
6911 | // implicitly considered to be constexpr if the implicit declaration | ||||||
6912 | // would be. | ||||||
6913 | MD->setConstexprKind(Constexpr ? CSK_constexpr : CSK_unspecified); | ||||||
6914 | |||||||
6915 | if (!Type->hasExceptionSpec()) { | ||||||
6916 | // C++2a [except.spec]p3: | ||||||
6917 | // If a declaration of a function does not have a noexcept-specifier | ||||||
6918 | // [and] is defaulted on its first declaration, [...] the exception | ||||||
6919 | // specification is as specified below | ||||||
6920 | FunctionProtoType::ExtProtoInfo EPI = Type->getExtProtoInfo(); | ||||||
6921 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||
6922 | EPI.ExceptionSpec.SourceDecl = MD; | ||||||
6923 | MD->setType(Context.getFunctionType(ReturnType, | ||||||
6924 | llvm::makeArrayRef(&ArgType, | ||||||
6925 | ExpectedParams), | ||||||
6926 | EPI)); | ||||||
6927 | } | ||||||
6928 | } | ||||||
6929 | |||||||
6930 | if (ShouldDeleteForTypeMismatch || ShouldDeleteSpecialMember(MD, CSM)) { | ||||||
6931 | if (First) { | ||||||
6932 | SetDeclDeleted(MD, MD->getLocation()); | ||||||
6933 | if (!inTemplateInstantiation() && !HadError) { | ||||||
6934 | Diag(MD->getLocation(), diag::warn_defaulted_method_deleted) << CSM; | ||||||
6935 | if (ShouldDeleteForTypeMismatch) { | ||||||
6936 | Diag(MD->getLocation(), diag::note_deleted_type_mismatch) << CSM; | ||||||
6937 | } else { | ||||||
6938 | ShouldDeleteSpecialMember(MD, CSM, nullptr, /*Diagnose*/true); | ||||||
6939 | } | ||||||
6940 | } | ||||||
6941 | if (ShouldDeleteForTypeMismatch && !HadError) { | ||||||
6942 | Diag(MD->getLocation(), | ||||||
6943 | diag::warn_cxx17_compat_defaulted_method_type_mismatch) << CSM; | ||||||
6944 | } | ||||||
6945 | } else { | ||||||
6946 | // C++11 [dcl.fct.def.default]p4: | ||||||
6947 | // [For a] user-provided explicitly-defaulted function [...] if such a | ||||||
6948 | // function is implicitly defined as deleted, the program is ill-formed. | ||||||
6949 | Diag(MD->getLocation(), diag::err_out_of_line_default_deletes) << CSM; | ||||||
6950 | assert(!ShouldDeleteForTypeMismatch && "deleted non-first decl")((!ShouldDeleteForTypeMismatch && "deleted non-first decl" ) ? static_cast<void> (0) : __assert_fail ("!ShouldDeleteForTypeMismatch && \"deleted non-first decl\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 6950, __PRETTY_FUNCTION__)); | ||||||
6951 | ShouldDeleteSpecialMember(MD, CSM, nullptr, /*Diagnose*/true); | ||||||
6952 | HadError = true; | ||||||
6953 | } | ||||||
6954 | } | ||||||
6955 | |||||||
6956 | if (HadError) | ||||||
6957 | MD->setInvalidDecl(); | ||||||
6958 | } | ||||||
6959 | |||||||
6960 | void Sema::CheckDelayedMemberExceptionSpecs() { | ||||||
6961 | decltype(DelayedOverridingExceptionSpecChecks) Overriding; | ||||||
6962 | decltype(DelayedEquivalentExceptionSpecChecks) Equivalent; | ||||||
6963 | |||||||
6964 | std::swap(Overriding, DelayedOverridingExceptionSpecChecks); | ||||||
6965 | std::swap(Equivalent, DelayedEquivalentExceptionSpecChecks); | ||||||
6966 | |||||||
6967 | // Perform any deferred checking of exception specifications for virtual | ||||||
6968 | // destructors. | ||||||
6969 | for (auto &Check : Overriding) | ||||||
6970 | CheckOverridingFunctionExceptionSpec(Check.first, Check.second); | ||||||
6971 | |||||||
6972 | // Perform any deferred checking of exception specifications for befriended | ||||||
6973 | // special members. | ||||||
6974 | for (auto &Check : Equivalent) | ||||||
6975 | CheckEquivalentExceptionSpec(Check.second, Check.first); | ||||||
6976 | } | ||||||
6977 | |||||||
6978 | namespace { | ||||||
6979 | /// CRTP base class for visiting operations performed by a special member | ||||||
6980 | /// function (or inherited constructor). | ||||||
6981 | template<typename Derived> | ||||||
6982 | struct SpecialMemberVisitor { | ||||||
6983 | Sema &S; | ||||||
6984 | CXXMethodDecl *MD; | ||||||
6985 | Sema::CXXSpecialMember CSM; | ||||||
6986 | Sema::InheritedConstructorInfo *ICI; | ||||||
6987 | |||||||
6988 | // Properties of the special member, computed for convenience. | ||||||
6989 | bool IsConstructor = false, IsAssignment = false, ConstArg = false; | ||||||
6990 | |||||||
6991 | SpecialMemberVisitor(Sema &S, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||||
6992 | Sema::InheritedConstructorInfo *ICI) | ||||||
6993 | : S(S), MD(MD), CSM(CSM), ICI(ICI) { | ||||||
6994 | switch (CSM) { | ||||||
6995 | case Sema::CXXDefaultConstructor: | ||||||
6996 | case Sema::CXXCopyConstructor: | ||||||
6997 | case Sema::CXXMoveConstructor: | ||||||
6998 | IsConstructor = true; | ||||||
6999 | break; | ||||||
7000 | case Sema::CXXCopyAssignment: | ||||||
7001 | case Sema::CXXMoveAssignment: | ||||||
7002 | IsAssignment = true; | ||||||
7003 | break; | ||||||
7004 | case Sema::CXXDestructor: | ||||||
7005 | break; | ||||||
7006 | case Sema::CXXInvalid: | ||||||
7007 | llvm_unreachable("invalid special member kind")::llvm::llvm_unreachable_internal("invalid special member kind" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7007); | ||||||
7008 | } | ||||||
7009 | |||||||
7010 | if (MD->getNumParams()) { | ||||||
7011 | if (const ReferenceType *RT = | ||||||
7012 | MD->getParamDecl(0)->getType()->getAs<ReferenceType>()) | ||||||
7013 | ConstArg = RT->getPointeeType().isConstQualified(); | ||||||
7014 | } | ||||||
7015 | } | ||||||
7016 | |||||||
7017 | Derived &getDerived() { return static_cast<Derived&>(*this); } | ||||||
7018 | |||||||
7019 | /// Is this a "move" special member? | ||||||
7020 | bool isMove() const { | ||||||
7021 | return CSM == Sema::CXXMoveConstructor || CSM == Sema::CXXMoveAssignment; | ||||||
7022 | } | ||||||
7023 | |||||||
7024 | /// Look up the corresponding special member in the given class. | ||||||
7025 | Sema::SpecialMemberOverloadResult lookupIn(CXXRecordDecl *Class, | ||||||
7026 | unsigned Quals, bool IsMutable) { | ||||||
7027 | return lookupCallFromSpecialMember(S, Class, CSM, Quals, | ||||||
7028 | ConstArg && !IsMutable); | ||||||
7029 | } | ||||||
7030 | |||||||
7031 | /// Look up the constructor for the specified base class to see if it's | ||||||
7032 | /// overridden due to this being an inherited constructor. | ||||||
7033 | Sema::SpecialMemberOverloadResult lookupInheritedCtor(CXXRecordDecl *Class) { | ||||||
7034 | if (!ICI) | ||||||
7035 | return {}; | ||||||
7036 | assert(CSM == Sema::CXXDefaultConstructor)((CSM == Sema::CXXDefaultConstructor) ? static_cast<void> (0) : __assert_fail ("CSM == Sema::CXXDefaultConstructor", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7036, __PRETTY_FUNCTION__)); | ||||||
7037 | auto *BaseCtor = | ||||||
7038 | cast<CXXConstructorDecl>(MD)->getInheritedConstructor().getConstructor(); | ||||||
7039 | if (auto *MD = ICI->findConstructorForBase(Class, BaseCtor).first) | ||||||
7040 | return MD; | ||||||
7041 | return {}; | ||||||
7042 | } | ||||||
7043 | |||||||
7044 | /// A base or member subobject. | ||||||
7045 | typedef llvm::PointerUnion<CXXBaseSpecifier*, FieldDecl*> Subobject; | ||||||
7046 | |||||||
7047 | /// Get the location to use for a subobject in diagnostics. | ||||||
7048 | static SourceLocation getSubobjectLoc(Subobject Subobj) { | ||||||
7049 | // FIXME: For an indirect virtual base, the direct base leading to | ||||||
7050 | // the indirect virtual base would be a more useful choice. | ||||||
7051 | if (auto *B = Subobj.dyn_cast<CXXBaseSpecifier*>()) | ||||||
7052 | return B->getBaseTypeLoc(); | ||||||
7053 | else | ||||||
7054 | return Subobj.get<FieldDecl*>()->getLocation(); | ||||||
7055 | } | ||||||
7056 | |||||||
7057 | enum BasesToVisit { | ||||||
7058 | /// Visit all non-virtual (direct) bases. | ||||||
7059 | VisitNonVirtualBases, | ||||||
7060 | /// Visit all direct bases, virtual or not. | ||||||
7061 | VisitDirectBases, | ||||||
7062 | /// Visit all non-virtual bases, and all virtual bases if the class | ||||||
7063 | /// is not abstract. | ||||||
7064 | VisitPotentiallyConstructedBases, | ||||||
7065 | /// Visit all direct or virtual bases. | ||||||
7066 | VisitAllBases | ||||||
7067 | }; | ||||||
7068 | |||||||
7069 | // Visit the bases and members of the class. | ||||||
7070 | bool visit(BasesToVisit Bases) { | ||||||
7071 | CXXRecordDecl *RD = MD->getParent(); | ||||||
7072 | |||||||
7073 | if (Bases == VisitPotentiallyConstructedBases) | ||||||
7074 | Bases = RD->isAbstract() ? VisitNonVirtualBases : VisitAllBases; | ||||||
7075 | |||||||
7076 | for (auto &B : RD->bases()) | ||||||
7077 | if ((Bases == VisitDirectBases || !B.isVirtual()) && | ||||||
7078 | getDerived().visitBase(&B)) | ||||||
7079 | return true; | ||||||
7080 | |||||||
7081 | if (Bases == VisitAllBases) | ||||||
7082 | for (auto &B : RD->vbases()) | ||||||
7083 | if (getDerived().visitBase(&B)) | ||||||
7084 | return true; | ||||||
7085 | |||||||
7086 | for (auto *F : RD->fields()) | ||||||
7087 | if (!F->isInvalidDecl() && !F->isUnnamedBitfield() && | ||||||
7088 | getDerived().visitField(F)) | ||||||
7089 | return true; | ||||||
7090 | |||||||
7091 | return false; | ||||||
7092 | } | ||||||
7093 | }; | ||||||
7094 | } | ||||||
7095 | |||||||
7096 | namespace { | ||||||
7097 | struct SpecialMemberDeletionInfo | ||||||
7098 | : SpecialMemberVisitor<SpecialMemberDeletionInfo> { | ||||||
7099 | bool Diagnose; | ||||||
7100 | |||||||
7101 | SourceLocation Loc; | ||||||
7102 | |||||||
7103 | bool AllFieldsAreConst; | ||||||
7104 | |||||||
7105 | SpecialMemberDeletionInfo(Sema &S, CXXMethodDecl *MD, | ||||||
7106 | Sema::CXXSpecialMember CSM, | ||||||
7107 | Sema::InheritedConstructorInfo *ICI, bool Diagnose) | ||||||
7108 | : SpecialMemberVisitor(S, MD, CSM, ICI), Diagnose(Diagnose), | ||||||
7109 | Loc(MD->getLocation()), AllFieldsAreConst(true) {} | ||||||
7110 | |||||||
7111 | bool inUnion() const { return MD->getParent()->isUnion(); } | ||||||
7112 | |||||||
7113 | Sema::CXXSpecialMember getEffectiveCSM() { | ||||||
7114 | return ICI ? Sema::CXXInvalid : CSM; | ||||||
7115 | } | ||||||
7116 | |||||||
7117 | bool shouldDeleteForVariantObjCPtrMember(FieldDecl *FD, QualType FieldType); | ||||||
7118 | |||||||
7119 | bool visitBase(CXXBaseSpecifier *Base) { return shouldDeleteForBase(Base); } | ||||||
7120 | bool visitField(FieldDecl *Field) { return shouldDeleteForField(Field); } | ||||||
7121 | |||||||
7122 | bool shouldDeleteForBase(CXXBaseSpecifier *Base); | ||||||
7123 | bool shouldDeleteForField(FieldDecl *FD); | ||||||
7124 | bool shouldDeleteForAllConstMembers(); | ||||||
7125 | |||||||
7126 | bool shouldDeleteForClassSubobject(CXXRecordDecl *Class, Subobject Subobj, | ||||||
7127 | unsigned Quals); | ||||||
7128 | bool shouldDeleteForSubobjectCall(Subobject Subobj, | ||||||
7129 | Sema::SpecialMemberOverloadResult SMOR, | ||||||
7130 | bool IsDtorCallInCtor); | ||||||
7131 | |||||||
7132 | bool isAccessible(Subobject Subobj, CXXMethodDecl *D); | ||||||
7133 | }; | ||||||
7134 | } | ||||||
7135 | |||||||
7136 | /// Is the given special member inaccessible when used on the given | ||||||
7137 | /// sub-object. | ||||||
7138 | bool SpecialMemberDeletionInfo::isAccessible(Subobject Subobj, | ||||||
7139 | CXXMethodDecl *target) { | ||||||
7140 | /// If we're operating on a base class, the object type is the | ||||||
7141 | /// type of this special member. | ||||||
7142 | QualType objectTy; | ||||||
7143 | AccessSpecifier access = target->getAccess(); | ||||||
7144 | if (CXXBaseSpecifier *base = Subobj.dyn_cast<CXXBaseSpecifier*>()) { | ||||||
7145 | objectTy = S.Context.getTypeDeclType(MD->getParent()); | ||||||
7146 | access = CXXRecordDecl::MergeAccess(base->getAccessSpecifier(), access); | ||||||
7147 | |||||||
7148 | // If we're operating on a field, the object type is the type of the field. | ||||||
7149 | } else { | ||||||
7150 | objectTy = S.Context.getTypeDeclType(target->getParent()); | ||||||
7151 | } | ||||||
7152 | |||||||
7153 | return S.isSpecialMemberAccessibleForDeletion(target, access, objectTy); | ||||||
7154 | } | ||||||
7155 | |||||||
7156 | /// Check whether we should delete a special member due to the implicit | ||||||
7157 | /// definition containing a call to a special member of a subobject. | ||||||
7158 | bool SpecialMemberDeletionInfo::shouldDeleteForSubobjectCall( | ||||||
7159 | Subobject Subobj, Sema::SpecialMemberOverloadResult SMOR, | ||||||
7160 | bool IsDtorCallInCtor) { | ||||||
7161 | CXXMethodDecl *Decl = SMOR.getMethod(); | ||||||
7162 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||||
7163 | |||||||
7164 | int DiagKind = -1; | ||||||
7165 | |||||||
7166 | if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted) | ||||||
7167 | DiagKind = !Decl ? 0 : 1; | ||||||
7168 | else if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous) | ||||||
7169 | DiagKind = 2; | ||||||
7170 | else if (!isAccessible(Subobj, Decl)) | ||||||
7171 | DiagKind = 3; | ||||||
7172 | else if (!IsDtorCallInCtor && Field && Field->getParent()->isUnion() && | ||||||
7173 | !Decl->isTrivial()) { | ||||||
7174 | // A member of a union must have a trivial corresponding special member. | ||||||
7175 | // As a weird special case, a destructor call from a union's constructor | ||||||
7176 | // must be accessible and non-deleted, but need not be trivial. Such a | ||||||
7177 | // destructor is never actually called, but is semantically checked as | ||||||
7178 | // if it were. | ||||||
7179 | DiagKind = 4; | ||||||
7180 | } | ||||||
7181 | |||||||
7182 | if (DiagKind == -1) | ||||||
7183 | return false; | ||||||
7184 | |||||||
7185 | if (Diagnose) { | ||||||
7186 | if (Field) { | ||||||
7187 | S.Diag(Field->getLocation(), | ||||||
7188 | diag::note_deleted_special_member_class_subobject) | ||||||
7189 | << getEffectiveCSM() << MD->getParent() << /*IsField*/true | ||||||
7190 | << Field << DiagKind << IsDtorCallInCtor << /*IsObjCPtr*/false; | ||||||
7191 | } else { | ||||||
7192 | CXXBaseSpecifier *Base = Subobj.get<CXXBaseSpecifier*>(); | ||||||
7193 | S.Diag(Base->getBeginLoc(), | ||||||
7194 | diag::note_deleted_special_member_class_subobject) | ||||||
7195 | << getEffectiveCSM() << MD->getParent() << /*IsField*/ false | ||||||
7196 | << Base->getType() << DiagKind << IsDtorCallInCtor | ||||||
7197 | << /*IsObjCPtr*/false; | ||||||
7198 | } | ||||||
7199 | |||||||
7200 | if (DiagKind == 1) | ||||||
7201 | S.NoteDeletedFunction(Decl); | ||||||
7202 | // FIXME: Explain inaccessibility if DiagKind == 3. | ||||||
7203 | } | ||||||
7204 | |||||||
7205 | return true; | ||||||
7206 | } | ||||||
7207 | |||||||
7208 | /// Check whether we should delete a special member function due to having a | ||||||
7209 | /// direct or virtual base class or non-static data member of class type M. | ||||||
7210 | bool SpecialMemberDeletionInfo::shouldDeleteForClassSubobject( | ||||||
7211 | CXXRecordDecl *Class, Subobject Subobj, unsigned Quals) { | ||||||
7212 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||||
7213 | bool IsMutable = Field && Field->isMutable(); | ||||||
7214 | |||||||
7215 | // C++11 [class.ctor]p5: | ||||||
7216 | // -- any direct or virtual base class, or non-static data member with no | ||||||
7217 | // brace-or-equal-initializer, has class type M (or array thereof) and | ||||||
7218 | // either M has no default constructor or overload resolution as applied | ||||||
7219 | // to M's default constructor results in an ambiguity or in a function | ||||||
7220 | // that is deleted or inaccessible | ||||||
7221 | // C++11 [class.copy]p11, C++11 [class.copy]p23: | ||||||
7222 | // -- a direct or virtual base class B that cannot be copied/moved because | ||||||
7223 | // overload resolution, as applied to B's corresponding special member, | ||||||
7224 | // results in an ambiguity or a function that is deleted or inaccessible | ||||||
7225 | // from the defaulted special member | ||||||
7226 | // C++11 [class.dtor]p5: | ||||||
7227 | // -- any direct or virtual base class [...] has a type with a destructor | ||||||
7228 | // that is deleted or inaccessible | ||||||
7229 | if (!(CSM == Sema::CXXDefaultConstructor && | ||||||
7230 | Field && Field->hasInClassInitializer()) && | ||||||
7231 | shouldDeleteForSubobjectCall(Subobj, lookupIn(Class, Quals, IsMutable), | ||||||
7232 | false)) | ||||||
7233 | return true; | ||||||
7234 | |||||||
7235 | // C++11 [class.ctor]p5, C++11 [class.copy]p11: | ||||||
7236 | // -- any direct or virtual base class or non-static data member has a | ||||||
7237 | // type with a destructor that is deleted or inaccessible | ||||||
7238 | if (IsConstructor) { | ||||||
7239 | Sema::SpecialMemberOverloadResult SMOR = | ||||||
7240 | S.LookupSpecialMember(Class, Sema::CXXDestructor, | ||||||
7241 | false, false, false, false, false); | ||||||
7242 | if (shouldDeleteForSubobjectCall(Subobj, SMOR, true)) | ||||||
7243 | return true; | ||||||
7244 | } | ||||||
7245 | |||||||
7246 | return false; | ||||||
7247 | } | ||||||
7248 | |||||||
7249 | bool SpecialMemberDeletionInfo::shouldDeleteForVariantObjCPtrMember( | ||||||
7250 | FieldDecl *FD, QualType FieldType) { | ||||||
7251 | // The defaulted special functions are defined as deleted if this is a variant | ||||||
7252 | // member with a non-trivial ownership type, e.g., ObjC __strong or __weak | ||||||
7253 | // type under ARC. | ||||||
7254 | if (!FieldType.hasNonTrivialObjCLifetime()) | ||||||
7255 | return false; | ||||||
7256 | |||||||
7257 | // Don't make the defaulted default constructor defined as deleted if the | ||||||
7258 | // member has an in-class initializer. | ||||||
7259 | if (CSM == Sema::CXXDefaultConstructor && FD->hasInClassInitializer()) | ||||||
7260 | return false; | ||||||
7261 | |||||||
7262 | if (Diagnose) { | ||||||
7263 | auto *ParentClass = cast<CXXRecordDecl>(FD->getParent()); | ||||||
7264 | S.Diag(FD->getLocation(), | ||||||
7265 | diag::note_deleted_special_member_class_subobject) | ||||||
7266 | << getEffectiveCSM() << ParentClass << /*IsField*/true | ||||||
7267 | << FD << 4 << /*IsDtorCallInCtor*/false << /*IsObjCPtr*/true; | ||||||
7268 | } | ||||||
7269 | |||||||
7270 | return true; | ||||||
7271 | } | ||||||
7272 | |||||||
7273 | /// Check whether we should delete a special member function due to the class | ||||||
7274 | /// having a particular direct or virtual base class. | ||||||
7275 | bool SpecialMemberDeletionInfo::shouldDeleteForBase(CXXBaseSpecifier *Base) { | ||||||
7276 | CXXRecordDecl *BaseClass = Base->getType()->getAsCXXRecordDecl(); | ||||||
7277 | // If program is correct, BaseClass cannot be null, but if it is, the error | ||||||
7278 | // must be reported elsewhere. | ||||||
7279 | if (!BaseClass) | ||||||
7280 | return false; | ||||||
7281 | // If we have an inheriting constructor, check whether we're calling an | ||||||
7282 | // inherited constructor instead of a default constructor. | ||||||
7283 | Sema::SpecialMemberOverloadResult SMOR = lookupInheritedCtor(BaseClass); | ||||||
7284 | if (auto *BaseCtor = SMOR.getMethod()) { | ||||||
7285 | // Note that we do not check access along this path; other than that, | ||||||
7286 | // this is the same as shouldDeleteForSubobjectCall(Base, BaseCtor, false); | ||||||
7287 | // FIXME: Check that the base has a usable destructor! Sink this into | ||||||
7288 | // shouldDeleteForClassSubobject. | ||||||
7289 | if (BaseCtor->isDeleted() && Diagnose) { | ||||||
7290 | S.Diag(Base->getBeginLoc(), | ||||||
7291 | diag::note_deleted_special_member_class_subobject) | ||||||
7292 | << getEffectiveCSM() << MD->getParent() << /*IsField*/ false | ||||||
7293 | << Base->getType() << /*Deleted*/ 1 << /*IsDtorCallInCtor*/ false | ||||||
7294 | << /*IsObjCPtr*/false; | ||||||
7295 | S.NoteDeletedFunction(BaseCtor); | ||||||
7296 | } | ||||||
7297 | return BaseCtor->isDeleted(); | ||||||
7298 | } | ||||||
7299 | return shouldDeleteForClassSubobject(BaseClass, Base, 0); | ||||||
7300 | } | ||||||
7301 | |||||||
7302 | /// Check whether we should delete a special member function due to the class | ||||||
7303 | /// having a particular non-static data member. | ||||||
7304 | bool SpecialMemberDeletionInfo::shouldDeleteForField(FieldDecl *FD) { | ||||||
7305 | QualType FieldType = S.Context.getBaseElementType(FD->getType()); | ||||||
7306 | CXXRecordDecl *FieldRecord = FieldType->getAsCXXRecordDecl(); | ||||||
7307 | |||||||
7308 | if (inUnion() && shouldDeleteForVariantObjCPtrMember(FD, FieldType)) | ||||||
7309 | return true; | ||||||
7310 | |||||||
7311 | if (CSM == Sema::CXXDefaultConstructor) { | ||||||
7312 | // For a default constructor, all references must be initialized in-class | ||||||
7313 | // and, if a union, it must have a non-const member. | ||||||
7314 | if (FieldType->isReferenceType() && !FD->hasInClassInitializer()) { | ||||||
7315 | if (Diagnose) | ||||||
7316 | S.Diag(FD->getLocation(), diag::note_deleted_default_ctor_uninit_field) | ||||||
7317 | << !!ICI << MD->getParent() << FD << FieldType << /*Reference*/0; | ||||||
7318 | return true; | ||||||
7319 | } | ||||||
7320 | // C++11 [class.ctor]p5: any non-variant non-static data member of | ||||||
7321 | // const-qualified type (or array thereof) with no | ||||||
7322 | // brace-or-equal-initializer does not have a user-provided default | ||||||
7323 | // constructor. | ||||||
7324 | if (!inUnion() && FieldType.isConstQualified() && | ||||||
7325 | !FD->hasInClassInitializer() && | ||||||
7326 | (!FieldRecord || !FieldRecord->hasUserProvidedDefaultConstructor())) { | ||||||
7327 | if (Diagnose) | ||||||
7328 | S.Diag(FD->getLocation(), diag::note_deleted_default_ctor_uninit_field) | ||||||
7329 | << !!ICI << MD->getParent() << FD << FD->getType() << /*Const*/1; | ||||||
7330 | return true; | ||||||
7331 | } | ||||||
7332 | |||||||
7333 | if (inUnion() && !FieldType.isConstQualified()) | ||||||
7334 | AllFieldsAreConst = false; | ||||||
7335 | } else if (CSM == Sema::CXXCopyConstructor) { | ||||||
7336 | // For a copy constructor, data members must not be of rvalue reference | ||||||
7337 | // type. | ||||||
7338 | if (FieldType->isRValueReferenceType()) { | ||||||
7339 | if (Diagnose) | ||||||
7340 | S.Diag(FD->getLocation(), diag::note_deleted_copy_ctor_rvalue_reference) | ||||||
7341 | << MD->getParent() << FD << FieldType; | ||||||
7342 | return true; | ||||||
7343 | } | ||||||
7344 | } else if (IsAssignment) { | ||||||
7345 | // For an assignment operator, data members must not be of reference type. | ||||||
7346 | if (FieldType->isReferenceType()) { | ||||||
7347 | if (Diagnose) | ||||||
7348 | S.Diag(FD->getLocation(), diag::note_deleted_assign_field) | ||||||
7349 | << isMove() << MD->getParent() << FD << FieldType << /*Reference*/0; | ||||||
7350 | return true; | ||||||
7351 | } | ||||||
7352 | if (!FieldRecord && FieldType.isConstQualified()) { | ||||||
7353 | // C++11 [class.copy]p23: | ||||||
7354 | // -- a non-static data member of const non-class type (or array thereof) | ||||||
7355 | if (Diagnose) | ||||||
7356 | S.Diag(FD->getLocation(), diag::note_deleted_assign_field) | ||||||
7357 | << isMove() << MD->getParent() << FD << FD->getType() << /*Const*/1; | ||||||
7358 | return true; | ||||||
7359 | } | ||||||
7360 | } | ||||||
7361 | |||||||
7362 | if (FieldRecord) { | ||||||
7363 | // Some additional restrictions exist on the variant members. | ||||||
7364 | if (!inUnion() && FieldRecord->isUnion() && | ||||||
7365 | FieldRecord->isAnonymousStructOrUnion()) { | ||||||
7366 | bool AllVariantFieldsAreConst = true; | ||||||
7367 | |||||||
7368 | // FIXME: Handle anonymous unions declared within anonymous unions. | ||||||
7369 | for (auto *UI : FieldRecord->fields()) { | ||||||
7370 | QualType UnionFieldType = S.Context.getBaseElementType(UI->getType()); | ||||||
7371 | |||||||
7372 | if (shouldDeleteForVariantObjCPtrMember(&*UI, UnionFieldType)) | ||||||
7373 | return true; | ||||||
7374 | |||||||
7375 | if (!UnionFieldType.isConstQualified()) | ||||||
7376 | AllVariantFieldsAreConst = false; | ||||||
7377 | |||||||
7378 | CXXRecordDecl *UnionFieldRecord = UnionFieldType->getAsCXXRecordDecl(); | ||||||
7379 | if (UnionFieldRecord && | ||||||
7380 | shouldDeleteForClassSubobject(UnionFieldRecord, UI, | ||||||
7381 | UnionFieldType.getCVRQualifiers())) | ||||||
7382 | return true; | ||||||
7383 | } | ||||||
7384 | |||||||
7385 | // At least one member in each anonymous union must be non-const | ||||||
7386 | if (CSM == Sema::CXXDefaultConstructor && AllVariantFieldsAreConst && | ||||||
7387 | !FieldRecord->field_empty()) { | ||||||
7388 | if (Diagnose) | ||||||
7389 | S.Diag(FieldRecord->getLocation(), | ||||||
7390 | diag::note_deleted_default_ctor_all_const) | ||||||
7391 | << !!ICI << MD->getParent() << /*anonymous union*/1; | ||||||
7392 | return true; | ||||||
7393 | } | ||||||
7394 | |||||||
7395 | // Don't check the implicit member of the anonymous union type. | ||||||
7396 | // This is technically non-conformant, but sanity demands it. | ||||||
7397 | return false; | ||||||
7398 | } | ||||||
7399 | |||||||
7400 | if (shouldDeleteForClassSubobject(FieldRecord, FD, | ||||||
7401 | FieldType.getCVRQualifiers())) | ||||||
7402 | return true; | ||||||
7403 | } | ||||||
7404 | |||||||
7405 | return false; | ||||||
7406 | } | ||||||
7407 | |||||||
7408 | /// C++11 [class.ctor] p5: | ||||||
7409 | /// A defaulted default constructor for a class X is defined as deleted if | ||||||
7410 | /// X is a union and all of its variant members are of const-qualified type. | ||||||
7411 | bool SpecialMemberDeletionInfo::shouldDeleteForAllConstMembers() { | ||||||
7412 | // This is a silly definition, because it gives an empty union a deleted | ||||||
7413 | // default constructor. Don't do that. | ||||||
7414 | if (CSM == Sema::CXXDefaultConstructor && inUnion() && AllFieldsAreConst) { | ||||||
7415 | bool AnyFields = false; | ||||||
7416 | for (auto *F : MD->getParent()->fields()) | ||||||
7417 | if ((AnyFields = !F->isUnnamedBitfield())) | ||||||
7418 | break; | ||||||
7419 | if (!AnyFields) | ||||||
7420 | return false; | ||||||
7421 | if (Diagnose) | ||||||
7422 | S.Diag(MD->getParent()->getLocation(), | ||||||
7423 | diag::note_deleted_default_ctor_all_const) | ||||||
7424 | << !!ICI << MD->getParent() << /*not anonymous union*/0; | ||||||
7425 | return true; | ||||||
7426 | } | ||||||
7427 | return false; | ||||||
7428 | } | ||||||
7429 | |||||||
7430 | /// Determine whether a defaulted special member function should be defined as | ||||||
7431 | /// deleted, as specified in C++11 [class.ctor]p5, C++11 [class.copy]p11, | ||||||
7432 | /// C++11 [class.copy]p23, and C++11 [class.dtor]p5. | ||||||
7433 | bool Sema::ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM, | ||||||
7434 | InheritedConstructorInfo *ICI, | ||||||
7435 | bool Diagnose) { | ||||||
7436 | if (MD->isInvalidDecl()) | ||||||
7437 | return false; | ||||||
7438 | CXXRecordDecl *RD = MD->getParent(); | ||||||
7439 | assert(!RD->isDependentType() && "do deletion after instantiation")((!RD->isDependentType() && "do deletion after instantiation" ) ? static_cast<void> (0) : __assert_fail ("!RD->isDependentType() && \"do deletion after instantiation\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7439, __PRETTY_FUNCTION__)); | ||||||
7440 | if (!LangOpts.CPlusPlus11 || RD->isInvalidDecl()) | ||||||
7441 | return false; | ||||||
7442 | |||||||
7443 | // C++11 [expr.lambda.prim]p19: | ||||||
7444 | // The closure type associated with a lambda-expression has a | ||||||
7445 | // deleted (8.4.3) default constructor and a deleted copy | ||||||
7446 | // assignment operator. | ||||||
7447 | // C++2a adds back these operators if the lambda has no lambda-capture. | ||||||
7448 | if (RD->isLambda() && !RD->lambdaIsDefaultConstructibleAndAssignable() && | ||||||
7449 | (CSM == CXXDefaultConstructor || CSM == CXXCopyAssignment)) { | ||||||
7450 | if (Diagnose) | ||||||
7451 | Diag(RD->getLocation(), diag::note_lambda_decl); | ||||||
7452 | return true; | ||||||
7453 | } | ||||||
7454 | |||||||
7455 | // For an anonymous struct or union, the copy and assignment special members | ||||||
7456 | // will never be used, so skip the check. For an anonymous union declared at | ||||||
7457 | // namespace scope, the constructor and destructor are used. | ||||||
7458 | if (CSM != CXXDefaultConstructor && CSM != CXXDestructor && | ||||||
7459 | RD->isAnonymousStructOrUnion()) | ||||||
7460 | return false; | ||||||
7461 | |||||||
7462 | // C++11 [class.copy]p7, p18: | ||||||
7463 | // If the class definition declares a move constructor or move assignment | ||||||
7464 | // operator, an implicitly declared copy constructor or copy assignment | ||||||
7465 | // operator is defined as deleted. | ||||||
7466 | if (MD->isImplicit() && | ||||||
7467 | (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment)) { | ||||||
7468 | CXXMethodDecl *UserDeclaredMove = nullptr; | ||||||
7469 | |||||||
7470 | // In Microsoft mode up to MSVC 2013, a user-declared move only causes the | ||||||
7471 | // deletion of the corresponding copy operation, not both copy operations. | ||||||
7472 | // MSVC 2015 has adopted the standards conforming behavior. | ||||||
7473 | bool DeletesOnlyMatchingCopy = | ||||||
7474 | getLangOpts().MSVCCompat && | ||||||
7475 | !getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015); | ||||||
7476 | |||||||
7477 | if (RD->hasUserDeclaredMoveConstructor() && | ||||||
7478 | (!DeletesOnlyMatchingCopy || CSM == CXXCopyConstructor)) { | ||||||
7479 | if (!Diagnose) return true; | ||||||
7480 | |||||||
7481 | // Find any user-declared move constructor. | ||||||
7482 | for (auto *I : RD->ctors()) { | ||||||
7483 | if (I->isMoveConstructor()) { | ||||||
7484 | UserDeclaredMove = I; | ||||||
7485 | break; | ||||||
7486 | } | ||||||
7487 | } | ||||||
7488 | assert(UserDeclaredMove)((UserDeclaredMove) ? static_cast<void> (0) : __assert_fail ("UserDeclaredMove", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7488, __PRETTY_FUNCTION__)); | ||||||
7489 | } else if (RD->hasUserDeclaredMoveAssignment() && | ||||||
7490 | (!DeletesOnlyMatchingCopy || CSM == CXXCopyAssignment)) { | ||||||
7491 | if (!Diagnose) return true; | ||||||
7492 | |||||||
7493 | // Find any user-declared move assignment operator. | ||||||
7494 | for (auto *I : RD->methods()) { | ||||||
7495 | if (I->isMoveAssignmentOperator()) { | ||||||
7496 | UserDeclaredMove = I; | ||||||
7497 | break; | ||||||
7498 | } | ||||||
7499 | } | ||||||
7500 | assert(UserDeclaredMove)((UserDeclaredMove) ? static_cast<void> (0) : __assert_fail ("UserDeclaredMove", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7500, __PRETTY_FUNCTION__)); | ||||||
7501 | } | ||||||
7502 | |||||||
7503 | if (UserDeclaredMove) { | ||||||
7504 | Diag(UserDeclaredMove->getLocation(), | ||||||
7505 | diag::note_deleted_copy_user_declared_move) | ||||||
7506 | << (CSM == CXXCopyAssignment) << RD | ||||||
7507 | << UserDeclaredMove->isMoveAssignmentOperator(); | ||||||
7508 | return true; | ||||||
7509 | } | ||||||
7510 | } | ||||||
7511 | |||||||
7512 | // Do access control from the special member function | ||||||
7513 | ContextRAII MethodContext(*this, MD); | ||||||
7514 | |||||||
7515 | // C++11 [class.dtor]p5: | ||||||
7516 | // -- for a virtual destructor, lookup of the non-array deallocation function | ||||||
7517 | // results in an ambiguity or in a function that is deleted or inaccessible | ||||||
7518 | if (CSM == CXXDestructor && MD->isVirtual()) { | ||||||
7519 | FunctionDecl *OperatorDelete = nullptr; | ||||||
7520 | DeclarationName Name = | ||||||
7521 | Context.DeclarationNames.getCXXOperatorName(OO_Delete); | ||||||
7522 | if (FindDeallocationFunction(MD->getLocation(), MD->getParent(), Name, | ||||||
7523 | OperatorDelete, /*Diagnose*/false)) { | ||||||
7524 | if (Diagnose) | ||||||
7525 | Diag(RD->getLocation(), diag::note_deleted_dtor_no_operator_delete); | ||||||
7526 | return true; | ||||||
7527 | } | ||||||
7528 | } | ||||||
7529 | |||||||
7530 | SpecialMemberDeletionInfo SMI(*this, MD, CSM, ICI, Diagnose); | ||||||
7531 | |||||||
7532 | // Per DR1611, do not consider virtual bases of constructors of abstract | ||||||
7533 | // classes, since we are not going to construct them. | ||||||
7534 | // Per DR1658, do not consider virtual bases of destructors of abstract | ||||||
7535 | // classes either. | ||||||
7536 | // Per DR2180, for assignment operators we only assign (and thus only | ||||||
7537 | // consider) direct bases. | ||||||
7538 | if (SMI.visit(SMI.IsAssignment ? SMI.VisitDirectBases | ||||||
7539 | : SMI.VisitPotentiallyConstructedBases)) | ||||||
7540 | return true; | ||||||
7541 | |||||||
7542 | if (SMI.shouldDeleteForAllConstMembers()) | ||||||
7543 | return true; | ||||||
7544 | |||||||
7545 | if (getLangOpts().CUDA) { | ||||||
7546 | // We should delete the special member in CUDA mode if target inference | ||||||
7547 | // failed. | ||||||
7548 | // For inherited constructors (non-null ICI), CSM may be passed so that MD | ||||||
7549 | // is treated as certain special member, which may not reflect what special | ||||||
7550 | // member MD really is. However inferCUDATargetForImplicitSpecialMember | ||||||
7551 | // expects CSM to match MD, therefore recalculate CSM. | ||||||
7552 | assert(ICI || CSM == getSpecialMember(MD))((ICI || CSM == getSpecialMember(MD)) ? static_cast<void> (0) : __assert_fail ("ICI || CSM == getSpecialMember(MD)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7552, __PRETTY_FUNCTION__)); | ||||||
7553 | auto RealCSM = CSM; | ||||||
7554 | if (ICI) | ||||||
7555 | RealCSM = getSpecialMember(MD); | ||||||
7556 | |||||||
7557 | return inferCUDATargetForImplicitSpecialMember(RD, RealCSM, MD, | ||||||
7558 | SMI.ConstArg, Diagnose); | ||||||
7559 | } | ||||||
7560 | |||||||
7561 | return false; | ||||||
7562 | } | ||||||
7563 | |||||||
7564 | /// Perform lookup for a special member of the specified kind, and determine | ||||||
7565 | /// whether it is trivial. If the triviality can be determined without the | ||||||
7566 | /// lookup, skip it. This is intended for use when determining whether a | ||||||
7567 | /// special member of a containing object is trivial, and thus does not ever | ||||||
7568 | /// perform overload resolution for default constructors. | ||||||
7569 | /// | ||||||
7570 | /// If \p Selected is not \c NULL, \c *Selected will be filled in with the | ||||||
7571 | /// member that was most likely to be intended to be trivial, if any. | ||||||
7572 | /// | ||||||
7573 | /// If \p ForCall is true, look at CXXRecord::HasTrivialSpecialMembersForCall to | ||||||
7574 | /// determine whether the special member is trivial. | ||||||
7575 | static bool findTrivialSpecialMember(Sema &S, CXXRecordDecl *RD, | ||||||
7576 | Sema::CXXSpecialMember CSM, unsigned Quals, | ||||||
7577 | bool ConstRHS, | ||||||
7578 | Sema::TrivialABIHandling TAH, | ||||||
7579 | CXXMethodDecl **Selected) { | ||||||
7580 | if (Selected) | ||||||
7581 | *Selected = nullptr; | ||||||
7582 | |||||||
7583 | switch (CSM) { | ||||||
7584 | case Sema::CXXInvalid: | ||||||
7585 | llvm_unreachable("not a special member")::llvm::llvm_unreachable_internal("not a special member", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7585); | ||||||
7586 | |||||||
7587 | case Sema::CXXDefaultConstructor: | ||||||
7588 | // C++11 [class.ctor]p5: | ||||||
7589 | // A default constructor is trivial if: | ||||||
7590 | // - all the [direct subobjects] have trivial default constructors | ||||||
7591 | // | ||||||
7592 | // Note, no overload resolution is performed in this case. | ||||||
7593 | if (RD->hasTrivialDefaultConstructor()) | ||||||
7594 | return true; | ||||||
7595 | |||||||
7596 | if (Selected) { | ||||||
7597 | // If there's a default constructor which could have been trivial, dig it | ||||||
7598 | // out. Otherwise, if there's any user-provided default constructor, point | ||||||
7599 | // to that as an example of why there's not a trivial one. | ||||||
7600 | CXXConstructorDecl *DefCtor = nullptr; | ||||||
7601 | if (RD->needsImplicitDefaultConstructor()) | ||||||
7602 | S.DeclareImplicitDefaultConstructor(RD); | ||||||
7603 | for (auto *CI : RD->ctors()) { | ||||||
7604 | if (!CI->isDefaultConstructor()) | ||||||
7605 | continue; | ||||||
7606 | DefCtor = CI; | ||||||
7607 | if (!DefCtor->isUserProvided()) | ||||||
7608 | break; | ||||||
7609 | } | ||||||
7610 | |||||||
7611 | *Selected = DefCtor; | ||||||
7612 | } | ||||||
7613 | |||||||
7614 | return false; | ||||||
7615 | |||||||
7616 | case Sema::CXXDestructor: | ||||||
7617 | // C++11 [class.dtor]p5: | ||||||
7618 | // A destructor is trivial if: | ||||||
7619 | // - all the direct [subobjects] have trivial destructors | ||||||
7620 | if (RD->hasTrivialDestructor() || | ||||||
7621 | (TAH == Sema::TAH_ConsiderTrivialABI && | ||||||
7622 | RD->hasTrivialDestructorForCall())) | ||||||
7623 | return true; | ||||||
7624 | |||||||
7625 | if (Selected) { | ||||||
7626 | if (RD->needsImplicitDestructor()) | ||||||
7627 | S.DeclareImplicitDestructor(RD); | ||||||
7628 | *Selected = RD->getDestructor(); | ||||||
7629 | } | ||||||
7630 | |||||||
7631 | return false; | ||||||
7632 | |||||||
7633 | case Sema::CXXCopyConstructor: | ||||||
7634 | // C++11 [class.copy]p12: | ||||||
7635 | // A copy constructor is trivial if: | ||||||
7636 | // - the constructor selected to copy each direct [subobject] is trivial | ||||||
7637 | if (RD->hasTrivialCopyConstructor() || | ||||||
7638 | (TAH == Sema::TAH_ConsiderTrivialABI && | ||||||
7639 | RD->hasTrivialCopyConstructorForCall())) { | ||||||
7640 | if (Quals == Qualifiers::Const) | ||||||
7641 | // We must either select the trivial copy constructor or reach an | ||||||
7642 | // ambiguity; no need to actually perform overload resolution. | ||||||
7643 | return true; | ||||||
7644 | } else if (!Selected) { | ||||||
7645 | return false; | ||||||
7646 | } | ||||||
7647 | // In C++98, we are not supposed to perform overload resolution here, but we | ||||||
7648 | // treat that as a language defect, as suggested on cxx-abi-dev, to treat | ||||||
7649 | // cases like B as having a non-trivial copy constructor: | ||||||
7650 | // struct A { template<typename T> A(T&); }; | ||||||
7651 | // struct B { mutable A a; }; | ||||||
7652 | goto NeedOverloadResolution; | ||||||
7653 | |||||||
7654 | case Sema::CXXCopyAssignment: | ||||||
7655 | // C++11 [class.copy]p25: | ||||||
7656 | // A copy assignment operator is trivial if: | ||||||
7657 | // - the assignment operator selected to copy each direct [subobject] is | ||||||
7658 | // trivial | ||||||
7659 | if (RD->hasTrivialCopyAssignment()) { | ||||||
7660 | if (Quals == Qualifiers::Const) | ||||||
7661 | return true; | ||||||
7662 | } else if (!Selected) { | ||||||
7663 | return false; | ||||||
7664 | } | ||||||
7665 | // In C++98, we are not supposed to perform overload resolution here, but we | ||||||
7666 | // treat that as a language defect. | ||||||
7667 | goto NeedOverloadResolution; | ||||||
7668 | |||||||
7669 | case Sema::CXXMoveConstructor: | ||||||
7670 | case Sema::CXXMoveAssignment: | ||||||
7671 | NeedOverloadResolution: | ||||||
7672 | Sema::SpecialMemberOverloadResult SMOR = | ||||||
7673 | lookupCallFromSpecialMember(S, RD, CSM, Quals, ConstRHS); | ||||||
7674 | |||||||
7675 | // The standard doesn't describe how to behave if the lookup is ambiguous. | ||||||
7676 | // We treat it as not making the member non-trivial, just like the standard | ||||||
7677 | // mandates for the default constructor. This should rarely matter, because | ||||||
7678 | // the member will also be deleted. | ||||||
7679 | if (SMOR.getKind() == Sema::SpecialMemberOverloadResult::Ambiguous) | ||||||
7680 | return true; | ||||||
7681 | |||||||
7682 | if (!SMOR.getMethod()) { | ||||||
7683 | assert(SMOR.getKind() ==((SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted ) ? static_cast<void> (0) : __assert_fail ("SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7684, __PRETTY_FUNCTION__)) | ||||||
7684 | Sema::SpecialMemberOverloadResult::NoMemberOrDeleted)((SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted ) ? static_cast<void> (0) : __assert_fail ("SMOR.getKind() == Sema::SpecialMemberOverloadResult::NoMemberOrDeleted" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7684, __PRETTY_FUNCTION__)); | ||||||
7685 | return false; | ||||||
7686 | } | ||||||
7687 | |||||||
7688 | // We deliberately don't check if we found a deleted special member. We're | ||||||
7689 | // not supposed to! | ||||||
7690 | if (Selected) | ||||||
7691 | *Selected = SMOR.getMethod(); | ||||||
7692 | |||||||
7693 | if (TAH == Sema::TAH_ConsiderTrivialABI && | ||||||
7694 | (CSM == Sema::CXXCopyConstructor || CSM == Sema::CXXMoveConstructor)) | ||||||
7695 | return SMOR.getMethod()->isTrivialForCall(); | ||||||
7696 | return SMOR.getMethod()->isTrivial(); | ||||||
7697 | } | ||||||
7698 | |||||||
7699 | llvm_unreachable("unknown special method kind")::llvm::llvm_unreachable_internal("unknown special method kind" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7699); | ||||||
7700 | } | ||||||
7701 | |||||||
7702 | static CXXConstructorDecl *findUserDeclaredCtor(CXXRecordDecl *RD) { | ||||||
7703 | for (auto *CI : RD->ctors()) | ||||||
7704 | if (!CI->isImplicit()) | ||||||
7705 | return CI; | ||||||
7706 | |||||||
7707 | // Look for constructor templates. | ||||||
7708 | typedef CXXRecordDecl::specific_decl_iterator<FunctionTemplateDecl> tmpl_iter; | ||||||
7709 | for (tmpl_iter TI(RD->decls_begin()), TE(RD->decls_end()); TI != TE; ++TI) { | ||||||
7710 | if (CXXConstructorDecl *CD = | ||||||
7711 | dyn_cast<CXXConstructorDecl>(TI->getTemplatedDecl())) | ||||||
7712 | return CD; | ||||||
7713 | } | ||||||
7714 | |||||||
7715 | return nullptr; | ||||||
7716 | } | ||||||
7717 | |||||||
7718 | /// The kind of subobject we are checking for triviality. The values of this | ||||||
7719 | /// enumeration are used in diagnostics. | ||||||
7720 | enum TrivialSubobjectKind { | ||||||
7721 | /// The subobject is a base class. | ||||||
7722 | TSK_BaseClass, | ||||||
7723 | /// The subobject is a non-static data member. | ||||||
7724 | TSK_Field, | ||||||
7725 | /// The object is actually the complete object. | ||||||
7726 | TSK_CompleteObject | ||||||
7727 | }; | ||||||
7728 | |||||||
7729 | /// Check whether the special member selected for a given type would be trivial. | ||||||
7730 | static bool checkTrivialSubobjectCall(Sema &S, SourceLocation SubobjLoc, | ||||||
7731 | QualType SubType, bool ConstRHS, | ||||||
7732 | Sema::CXXSpecialMember CSM, | ||||||
7733 | TrivialSubobjectKind Kind, | ||||||
7734 | Sema::TrivialABIHandling TAH, bool Diagnose) { | ||||||
7735 | CXXRecordDecl *SubRD = SubType->getAsCXXRecordDecl(); | ||||||
7736 | if (!SubRD) | ||||||
7737 | return true; | ||||||
7738 | |||||||
7739 | CXXMethodDecl *Selected; | ||||||
7740 | if (findTrivialSpecialMember(S, SubRD, CSM, SubType.getCVRQualifiers(), | ||||||
7741 | ConstRHS, TAH, Diagnose ? &Selected : nullptr)) | ||||||
7742 | return true; | ||||||
7743 | |||||||
7744 | if (Diagnose) { | ||||||
7745 | if (ConstRHS) | ||||||
7746 | SubType.addConst(); | ||||||
7747 | |||||||
7748 | if (!Selected && CSM == Sema::CXXDefaultConstructor) { | ||||||
7749 | S.Diag(SubobjLoc, diag::note_nontrivial_no_def_ctor) | ||||||
7750 | << Kind << SubType.getUnqualifiedType(); | ||||||
7751 | if (CXXConstructorDecl *CD = findUserDeclaredCtor(SubRD)) | ||||||
7752 | S.Diag(CD->getLocation(), diag::note_user_declared_ctor); | ||||||
7753 | } else if (!Selected) | ||||||
7754 | S.Diag(SubobjLoc, diag::note_nontrivial_no_copy) | ||||||
7755 | << Kind << SubType.getUnqualifiedType() << CSM << SubType; | ||||||
7756 | else if (Selected->isUserProvided()) { | ||||||
7757 | if (Kind == TSK_CompleteObject) | ||||||
7758 | S.Diag(Selected->getLocation(), diag::note_nontrivial_user_provided) | ||||||
7759 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||||
7760 | else { | ||||||
7761 | S.Diag(SubobjLoc, diag::note_nontrivial_user_provided) | ||||||
7762 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||||
7763 | S.Diag(Selected->getLocation(), diag::note_declared_at); | ||||||
7764 | } | ||||||
7765 | } else { | ||||||
7766 | if (Kind != TSK_CompleteObject) | ||||||
7767 | S.Diag(SubobjLoc, diag::note_nontrivial_subobject) | ||||||
7768 | << Kind << SubType.getUnqualifiedType() << CSM; | ||||||
7769 | |||||||
7770 | // Explain why the defaulted or deleted special member isn't trivial. | ||||||
7771 | S.SpecialMemberIsTrivial(Selected, CSM, Sema::TAH_IgnoreTrivialABI, | ||||||
7772 | Diagnose); | ||||||
7773 | } | ||||||
7774 | } | ||||||
7775 | |||||||
7776 | return false; | ||||||
7777 | } | ||||||
7778 | |||||||
7779 | /// Check whether the members of a class type allow a special member to be | ||||||
7780 | /// trivial. | ||||||
7781 | static bool checkTrivialClassMembers(Sema &S, CXXRecordDecl *RD, | ||||||
7782 | Sema::CXXSpecialMember CSM, | ||||||
7783 | bool ConstArg, | ||||||
7784 | Sema::TrivialABIHandling TAH, | ||||||
7785 | bool Diagnose) { | ||||||
7786 | for (const auto *FI : RD->fields()) { | ||||||
7787 | if (FI->isInvalidDecl() || FI->isUnnamedBitfield()) | ||||||
7788 | continue; | ||||||
7789 | |||||||
7790 | QualType FieldType = S.Context.getBaseElementType(FI->getType()); | ||||||
7791 | |||||||
7792 | // Pretend anonymous struct or union members are members of this class. | ||||||
7793 | if (FI->isAnonymousStructOrUnion()) { | ||||||
7794 | if (!checkTrivialClassMembers(S, FieldType->getAsCXXRecordDecl(), | ||||||
7795 | CSM, ConstArg, TAH, Diagnose)) | ||||||
7796 | return false; | ||||||
7797 | continue; | ||||||
7798 | } | ||||||
7799 | |||||||
7800 | // C++11 [class.ctor]p5: | ||||||
7801 | // A default constructor is trivial if [...] | ||||||
7802 | // -- no non-static data member of its class has a | ||||||
7803 | // brace-or-equal-initializer | ||||||
7804 | if (CSM == Sema::CXXDefaultConstructor && FI->hasInClassInitializer()) { | ||||||
7805 | if (Diagnose) | ||||||
7806 | S.Diag(FI->getLocation(), diag::note_nontrivial_in_class_init) << FI; | ||||||
7807 | return false; | ||||||
7808 | } | ||||||
7809 | |||||||
7810 | // Objective C ARC 4.3.5: | ||||||
7811 | // [...] nontrivally ownership-qualified types are [...] not trivially | ||||||
7812 | // default constructible, copy constructible, move constructible, copy | ||||||
7813 | // assignable, move assignable, or destructible [...] | ||||||
7814 | if (FieldType.hasNonTrivialObjCLifetime()) { | ||||||
7815 | if (Diagnose) | ||||||
7816 | S.Diag(FI->getLocation(), diag::note_nontrivial_objc_ownership) | ||||||
7817 | << RD << FieldType.getObjCLifetime(); | ||||||
7818 | return false; | ||||||
7819 | } | ||||||
7820 | |||||||
7821 | bool ConstRHS = ConstArg && !FI->isMutable(); | ||||||
7822 | if (!checkTrivialSubobjectCall(S, FI->getLocation(), FieldType, ConstRHS, | ||||||
7823 | CSM, TSK_Field, TAH, Diagnose)) | ||||||
7824 | return false; | ||||||
7825 | } | ||||||
7826 | |||||||
7827 | return true; | ||||||
7828 | } | ||||||
7829 | |||||||
7830 | /// Diagnose why the specified class does not have a trivial special member of | ||||||
7831 | /// the given kind. | ||||||
7832 | void Sema::DiagnoseNontrivial(const CXXRecordDecl *RD, CXXSpecialMember CSM) { | ||||||
7833 | QualType Ty = Context.getRecordType(RD); | ||||||
7834 | |||||||
7835 | bool ConstArg = (CSM == CXXCopyConstructor || CSM == CXXCopyAssignment); | ||||||
7836 | checkTrivialSubobjectCall(*this, RD->getLocation(), Ty, ConstArg, CSM, | ||||||
7837 | TSK_CompleteObject, TAH_IgnoreTrivialABI, | ||||||
7838 | /*Diagnose*/true); | ||||||
7839 | } | ||||||
7840 | |||||||
7841 | /// Determine whether a defaulted or deleted special member function is trivial, | ||||||
7842 | /// as specified in C++11 [class.ctor]p5, C++11 [class.copy]p12, | ||||||
7843 | /// C++11 [class.copy]p25, and C++11 [class.dtor]p5. | ||||||
7844 | bool Sema::SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM, | ||||||
7845 | TrivialABIHandling TAH, bool Diagnose) { | ||||||
7846 | assert(!MD->isUserProvided() && CSM != CXXInvalid && "not special enough")((!MD->isUserProvided() && CSM != CXXInvalid && "not special enough") ? static_cast<void> (0) : __assert_fail ("!MD->isUserProvided() && CSM != CXXInvalid && \"not special enough\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7846, __PRETTY_FUNCTION__)); | ||||||
7847 | |||||||
7848 | CXXRecordDecl *RD = MD->getParent(); | ||||||
7849 | |||||||
7850 | bool ConstArg = false; | ||||||
7851 | |||||||
7852 | // C++11 [class.copy]p12, p25: [DR1593] | ||||||
7853 | // A [special member] is trivial if [...] its parameter-type-list is | ||||||
7854 | // equivalent to the parameter-type-list of an implicit declaration [...] | ||||||
7855 | switch (CSM) { | ||||||
7856 | case CXXDefaultConstructor: | ||||||
7857 | case CXXDestructor: | ||||||
7858 | // Trivial default constructors and destructors cannot have parameters. | ||||||
7859 | break; | ||||||
7860 | |||||||
7861 | case CXXCopyConstructor: | ||||||
7862 | case CXXCopyAssignment: { | ||||||
7863 | // Trivial copy operations always have const, non-volatile parameter types. | ||||||
7864 | ConstArg = true; | ||||||
7865 | const ParmVarDecl *Param0 = MD->getParamDecl(0); | ||||||
7866 | const ReferenceType *RT = Param0->getType()->getAs<ReferenceType>(); | ||||||
7867 | if (!RT || RT->getPointeeType().getCVRQualifiers() != Qualifiers::Const) { | ||||||
7868 | if (Diagnose) | ||||||
7869 | Diag(Param0->getLocation(), diag::note_nontrivial_param_type) | ||||||
7870 | << Param0->getSourceRange() << Param0->getType() | ||||||
7871 | << Context.getLValueReferenceType( | ||||||
7872 | Context.getRecordType(RD).withConst()); | ||||||
7873 | return false; | ||||||
7874 | } | ||||||
7875 | break; | ||||||
7876 | } | ||||||
7877 | |||||||
7878 | case CXXMoveConstructor: | ||||||
7879 | case CXXMoveAssignment: { | ||||||
7880 | // Trivial move operations always have non-cv-qualified parameters. | ||||||
7881 | const ParmVarDecl *Param0 = MD->getParamDecl(0); | ||||||
7882 | const RValueReferenceType *RT = | ||||||
7883 | Param0->getType()->getAs<RValueReferenceType>(); | ||||||
7884 | if (!RT || RT->getPointeeType().getCVRQualifiers()) { | ||||||
7885 | if (Diagnose) | ||||||
7886 | Diag(Param0->getLocation(), diag::note_nontrivial_param_type) | ||||||
7887 | << Param0->getSourceRange() << Param0->getType() | ||||||
7888 | << Context.getRValueReferenceType(Context.getRecordType(RD)); | ||||||
7889 | return false; | ||||||
7890 | } | ||||||
7891 | break; | ||||||
7892 | } | ||||||
7893 | |||||||
7894 | case CXXInvalid: | ||||||
7895 | llvm_unreachable("not a special member")::llvm::llvm_unreachable_internal("not a special member", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7895); | ||||||
7896 | } | ||||||
7897 | |||||||
7898 | if (MD->getMinRequiredArguments() < MD->getNumParams()) { | ||||||
7899 | if (Diagnose) | ||||||
7900 | Diag(MD->getParamDecl(MD->getMinRequiredArguments())->getLocation(), | ||||||
7901 | diag::note_nontrivial_default_arg) | ||||||
7902 | << MD->getParamDecl(MD->getMinRequiredArguments())->getSourceRange(); | ||||||
7903 | return false; | ||||||
7904 | } | ||||||
7905 | if (MD->isVariadic()) { | ||||||
7906 | if (Diagnose) | ||||||
7907 | Diag(MD->getLocation(), diag::note_nontrivial_variadic); | ||||||
7908 | return false; | ||||||
7909 | } | ||||||
7910 | |||||||
7911 | // C++11 [class.ctor]p5, C++11 [class.dtor]p5: | ||||||
7912 | // A copy/move [constructor or assignment operator] is trivial if | ||||||
7913 | // -- the [member] selected to copy/move each direct base class subobject | ||||||
7914 | // is trivial | ||||||
7915 | // | ||||||
7916 | // C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||||
7917 | // A [default constructor or destructor] is trivial if | ||||||
7918 | // -- all the direct base classes have trivial [default constructors or | ||||||
7919 | // destructors] | ||||||
7920 | for (const auto &BI : RD->bases()) | ||||||
7921 | if (!checkTrivialSubobjectCall(*this, BI.getBeginLoc(), BI.getType(), | ||||||
7922 | ConstArg, CSM, TSK_BaseClass, TAH, Diagnose)) | ||||||
7923 | return false; | ||||||
7924 | |||||||
7925 | // C++11 [class.ctor]p5, C++11 [class.dtor]p5: | ||||||
7926 | // A copy/move [constructor or assignment operator] for a class X is | ||||||
7927 | // trivial if | ||||||
7928 | // -- for each non-static data member of X that is of class type (or array | ||||||
7929 | // thereof), the constructor selected to copy/move that member is | ||||||
7930 | // trivial | ||||||
7931 | // | ||||||
7932 | // C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||||
7933 | // A [default constructor or destructor] is trivial if | ||||||
7934 | // -- for all of the non-static data members of its class that are of class | ||||||
7935 | // type (or array thereof), each such class has a trivial [default | ||||||
7936 | // constructor or destructor] | ||||||
7937 | if (!checkTrivialClassMembers(*this, RD, CSM, ConstArg, TAH, Diagnose)) | ||||||
7938 | return false; | ||||||
7939 | |||||||
7940 | // C++11 [class.dtor]p5: | ||||||
7941 | // A destructor is trivial if [...] | ||||||
7942 | // -- the destructor is not virtual | ||||||
7943 | if (CSM == CXXDestructor && MD->isVirtual()) { | ||||||
7944 | if (Diagnose) | ||||||
7945 | Diag(MD->getLocation(), diag::note_nontrivial_virtual_dtor) << RD; | ||||||
7946 | return false; | ||||||
7947 | } | ||||||
7948 | |||||||
7949 | // C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25: | ||||||
7950 | // A [special member] for class X is trivial if [...] | ||||||
7951 | // -- class X has no virtual functions and no virtual base classes | ||||||
7952 | if (CSM != CXXDestructor && MD->getParent()->isDynamicClass()) { | ||||||
7953 | if (!Diagnose) | ||||||
7954 | return false; | ||||||
7955 | |||||||
7956 | if (RD->getNumVBases()) { | ||||||
7957 | // Check for virtual bases. We already know that the corresponding | ||||||
7958 | // member in all bases is trivial, so vbases must all be direct. | ||||||
7959 | CXXBaseSpecifier &BS = *RD->vbases_begin(); | ||||||
7960 | assert(BS.isVirtual())((BS.isVirtual()) ? static_cast<void> (0) : __assert_fail ("BS.isVirtual()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7960, __PRETTY_FUNCTION__)); | ||||||
7961 | Diag(BS.getBeginLoc(), diag::note_nontrivial_has_virtual) << RD << 1; | ||||||
7962 | return false; | ||||||
7963 | } | ||||||
7964 | |||||||
7965 | // Must have a virtual method. | ||||||
7966 | for (const auto *MI : RD->methods()) { | ||||||
7967 | if (MI->isVirtual()) { | ||||||
7968 | SourceLocation MLoc = MI->getBeginLoc(); | ||||||
7969 | Diag(MLoc, diag::note_nontrivial_has_virtual) << RD << 0; | ||||||
7970 | return false; | ||||||
7971 | } | ||||||
7972 | } | ||||||
7973 | |||||||
7974 | 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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 7974); | ||||||
7975 | } | ||||||
7976 | |||||||
7977 | // Looks like it's trivial! | ||||||
7978 | return true; | ||||||
7979 | } | ||||||
7980 | |||||||
7981 | namespace { | ||||||
7982 | struct FindHiddenVirtualMethod { | ||||||
7983 | Sema *S; | ||||||
7984 | CXXMethodDecl *Method; | ||||||
7985 | llvm::SmallPtrSet<const CXXMethodDecl *, 8> OverridenAndUsingBaseMethods; | ||||||
7986 | SmallVector<CXXMethodDecl *, 8> OverloadedMethods; | ||||||
7987 | |||||||
7988 | private: | ||||||
7989 | /// Check whether any most overridden method from MD in Methods | ||||||
7990 | static bool CheckMostOverridenMethods( | ||||||
7991 | const CXXMethodDecl *MD, | ||||||
7992 | const llvm::SmallPtrSetImpl<const CXXMethodDecl *> &Methods) { | ||||||
7993 | if (MD->size_overridden_methods() == 0) | ||||||
7994 | return Methods.count(MD->getCanonicalDecl()); | ||||||
7995 | for (const CXXMethodDecl *O : MD->overridden_methods()) | ||||||
7996 | if (CheckMostOverridenMethods(O, Methods)) | ||||||
7997 | return true; | ||||||
7998 | return false; | ||||||
7999 | } | ||||||
8000 | |||||||
8001 | public: | ||||||
8002 | /// Member lookup function that determines whether a given C++ | ||||||
8003 | /// method overloads virtual methods in a base class without overriding any, | ||||||
8004 | /// to be used with CXXRecordDecl::lookupInBases(). | ||||||
8005 | bool operator()(const CXXBaseSpecifier *Specifier, CXXBasePath &Path) { | ||||||
8006 | RecordDecl *BaseRecord = | ||||||
8007 | Specifier->getType()->getAs<RecordType>()->getDecl(); | ||||||
8008 | |||||||
8009 | DeclarationName Name = Method->getDeclName(); | ||||||
8010 | assert(Name.getNameKind() == DeclarationName::Identifier)((Name.getNameKind() == DeclarationName::Identifier) ? static_cast <void> (0) : __assert_fail ("Name.getNameKind() == DeclarationName::Identifier" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 8010, __PRETTY_FUNCTION__)); | ||||||
8011 | |||||||
8012 | bool foundSameNameMethod = false; | ||||||
8013 | SmallVector<CXXMethodDecl *, 8> overloadedMethods; | ||||||
8014 | for (Path.Decls = BaseRecord->lookup(Name); !Path.Decls.empty(); | ||||||
8015 | Path.Decls = Path.Decls.slice(1)) { | ||||||
8016 | NamedDecl *D = Path.Decls.front(); | ||||||
8017 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(D)) { | ||||||
8018 | MD = MD->getCanonicalDecl(); | ||||||
8019 | foundSameNameMethod = true; | ||||||
8020 | // Interested only in hidden virtual methods. | ||||||
8021 | if (!MD->isVirtual()) | ||||||
8022 | continue; | ||||||
8023 | // If the method we are checking overrides a method from its base | ||||||
8024 | // don't warn about the other overloaded methods. Clang deviates from | ||||||
8025 | // GCC by only diagnosing overloads of inherited virtual functions that | ||||||
8026 | // do not override any other virtual functions in the base. GCC's | ||||||
8027 | // -Woverloaded-virtual diagnoses any derived function hiding a virtual | ||||||
8028 | // function from a base class. These cases may be better served by a | ||||||
8029 | // warning (not specific to virtual functions) on call sites when the | ||||||
8030 | // call would select a different function from the base class, were it | ||||||
8031 | // visible. | ||||||
8032 | // See FIXME in test/SemaCXX/warn-overload-virtual.cpp for an example. | ||||||
8033 | if (!S->IsOverload(Method, MD, false)) | ||||||
8034 | return true; | ||||||
8035 | // Collect the overload only if its hidden. | ||||||
8036 | if (!CheckMostOverridenMethods(MD, OverridenAndUsingBaseMethods)) | ||||||
8037 | overloadedMethods.push_back(MD); | ||||||
8038 | } | ||||||
8039 | } | ||||||
8040 | |||||||
8041 | if (foundSameNameMethod) | ||||||
8042 | OverloadedMethods.append(overloadedMethods.begin(), | ||||||
8043 | overloadedMethods.end()); | ||||||
8044 | return foundSameNameMethod; | ||||||
8045 | } | ||||||
8046 | }; | ||||||
8047 | } // end anonymous namespace | ||||||
8048 | |||||||
8049 | /// Add the most overriden methods from MD to Methods | ||||||
8050 | static void AddMostOverridenMethods(const CXXMethodDecl *MD, | ||||||
8051 | llvm::SmallPtrSetImpl<const CXXMethodDecl *>& Methods) { | ||||||
8052 | if (MD->size_overridden_methods() == 0) | ||||||
8053 | Methods.insert(MD->getCanonicalDecl()); | ||||||
8054 | else | ||||||
8055 | for (const CXXMethodDecl *O : MD->overridden_methods()) | ||||||
8056 | AddMostOverridenMethods(O, Methods); | ||||||
8057 | } | ||||||
8058 | |||||||
8059 | /// Check if a method overloads virtual methods in a base class without | ||||||
8060 | /// overriding any. | ||||||
8061 | void Sema::FindHiddenVirtualMethods(CXXMethodDecl *MD, | ||||||
8062 | SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods) { | ||||||
8063 | if (!MD->getDeclName().isIdentifier()) | ||||||
8064 | return; | ||||||
8065 | |||||||
8066 | CXXBasePaths Paths(/*FindAmbiguities=*/true, // true to look in all bases. | ||||||
8067 | /*bool RecordPaths=*/false, | ||||||
8068 | /*bool DetectVirtual=*/false); | ||||||
8069 | FindHiddenVirtualMethod FHVM; | ||||||
8070 | FHVM.Method = MD; | ||||||
8071 | FHVM.S = this; | ||||||
8072 | |||||||
8073 | // Keep the base methods that were overridden or introduced in the subclass | ||||||
8074 | // by 'using' in a set. A base method not in this set is hidden. | ||||||
8075 | CXXRecordDecl *DC = MD->getParent(); | ||||||
8076 | DeclContext::lookup_result R = DC->lookup(MD->getDeclName()); | ||||||
8077 | for (DeclContext::lookup_iterator I = R.begin(), E = R.end(); I != E; ++I) { | ||||||
8078 | NamedDecl *ND = *I; | ||||||
8079 | if (UsingShadowDecl *shad = dyn_cast<UsingShadowDecl>(*I)) | ||||||
8080 | ND = shad->getTargetDecl(); | ||||||
8081 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(ND)) | ||||||
8082 | AddMostOverridenMethods(MD, FHVM.OverridenAndUsingBaseMethods); | ||||||
8083 | } | ||||||
8084 | |||||||
8085 | if (DC->lookupInBases(FHVM, Paths)) | ||||||
8086 | OverloadedMethods = FHVM.OverloadedMethods; | ||||||
8087 | } | ||||||
8088 | |||||||
8089 | void Sema::NoteHiddenVirtualMethods(CXXMethodDecl *MD, | ||||||
8090 | SmallVectorImpl<CXXMethodDecl*> &OverloadedMethods) { | ||||||
8091 | for (unsigned i = 0, e = OverloadedMethods.size(); i != e; ++i) { | ||||||
8092 | CXXMethodDecl *overloadedMD = OverloadedMethods[i]; | ||||||
8093 | PartialDiagnostic PD = PDiag( | ||||||
8094 | diag::note_hidden_overloaded_virtual_declared_here) << overloadedMD; | ||||||
8095 | HandleFunctionTypeMismatch(PD, MD->getType(), overloadedMD->getType()); | ||||||
8096 | Diag(overloadedMD->getLocation(), PD); | ||||||
8097 | } | ||||||
8098 | } | ||||||
8099 | |||||||
8100 | /// Diagnose methods which overload virtual methods in a base class | ||||||
8101 | /// without overriding any. | ||||||
8102 | void Sema::DiagnoseHiddenVirtualMethods(CXXMethodDecl *MD) { | ||||||
8103 | if (MD->isInvalidDecl()) | ||||||
8104 | return; | ||||||
8105 | |||||||
8106 | if (Diags.isIgnored(diag::warn_overloaded_virtual, MD->getLocation())) | ||||||
8107 | return; | ||||||
8108 | |||||||
8109 | SmallVector<CXXMethodDecl *, 8> OverloadedMethods; | ||||||
8110 | FindHiddenVirtualMethods(MD, OverloadedMethods); | ||||||
8111 | if (!OverloadedMethods.empty()) { | ||||||
8112 | Diag(MD->getLocation(), diag::warn_overloaded_virtual) | ||||||
8113 | << MD << (OverloadedMethods.size() > 1); | ||||||
8114 | |||||||
8115 | NoteHiddenVirtualMethods(MD, OverloadedMethods); | ||||||
8116 | } | ||||||
8117 | } | ||||||
8118 | |||||||
8119 | void Sema::checkIllFormedTrivialABIStruct(CXXRecordDecl &RD) { | ||||||
8120 | auto PrintDiagAndRemoveAttr = [&]() { | ||||||
8121 | // No diagnostics if this is a template instantiation. | ||||||
8122 | if (!isTemplateInstantiation(RD.getTemplateSpecializationKind())) | ||||||
8123 | Diag(RD.getAttr<TrivialABIAttr>()->getLocation(), | ||||||
8124 | diag::ext_cannot_use_trivial_abi) << &RD; | ||||||
8125 | RD.dropAttr<TrivialABIAttr>(); | ||||||
8126 | }; | ||||||
8127 | |||||||
8128 | // Ill-formed if the struct has virtual functions. | ||||||
8129 | if (RD.isPolymorphic()) { | ||||||
8130 | PrintDiagAndRemoveAttr(); | ||||||
8131 | return; | ||||||
8132 | } | ||||||
8133 | |||||||
8134 | for (const auto &B : RD.bases()) { | ||||||
8135 | // Ill-formed if the base class is non-trivial for the purpose of calls or a | ||||||
8136 | // virtual base. | ||||||
8137 | if ((!B.getType()->isDependentType() && | ||||||
8138 | !B.getType()->getAsCXXRecordDecl()->canPassInRegisters()) || | ||||||
8139 | B.isVirtual()) { | ||||||
8140 | PrintDiagAndRemoveAttr(); | ||||||
8141 | return; | ||||||
8142 | } | ||||||
8143 | } | ||||||
8144 | |||||||
8145 | for (const auto *FD : RD.fields()) { | ||||||
8146 | // Ill-formed if the field is an ObjectiveC pointer or of a type that is | ||||||
8147 | // non-trivial for the purpose of calls. | ||||||
8148 | QualType FT = FD->getType(); | ||||||
8149 | if (FT.getObjCLifetime() == Qualifiers::OCL_Weak) { | ||||||
8150 | PrintDiagAndRemoveAttr(); | ||||||
8151 | return; | ||||||
8152 | } | ||||||
8153 | |||||||
8154 | if (const auto *RT = FT->getBaseElementTypeUnsafe()->getAs<RecordType>()) | ||||||
8155 | if (!RT->isDependentType() && | ||||||
8156 | !cast<CXXRecordDecl>(RT->getDecl())->canPassInRegisters()) { | ||||||
8157 | PrintDiagAndRemoveAttr(); | ||||||
8158 | return; | ||||||
8159 | } | ||||||
8160 | } | ||||||
8161 | } | ||||||
8162 | |||||||
8163 | void Sema::ActOnFinishCXXMemberSpecification( | ||||||
8164 | Scope *S, SourceLocation RLoc, Decl *TagDecl, SourceLocation LBrac, | ||||||
8165 | SourceLocation RBrac, const ParsedAttributesView &AttrList) { | ||||||
8166 | if (!TagDecl) | ||||||
8167 | return; | ||||||
8168 | |||||||
8169 | AdjustDeclIfTemplate(TagDecl); | ||||||
8170 | |||||||
8171 | for (const ParsedAttr &AL : AttrList) { | ||||||
8172 | if (AL.getKind() != ParsedAttr::AT_Visibility) | ||||||
8173 | continue; | ||||||
8174 | AL.setInvalid(); | ||||||
8175 | Diag(AL.getLoc(), diag::warn_attribute_after_definition_ignored) << AL; | ||||||
8176 | } | ||||||
8177 | |||||||
8178 | ActOnFields(S, RLoc, TagDecl, llvm::makeArrayRef( | ||||||
8179 | // strict aliasing violation! | ||||||
8180 | reinterpret_cast<Decl**>(FieldCollector->getCurFields()), | ||||||
8181 | FieldCollector->getCurNumFields()), LBrac, RBrac, AttrList); | ||||||
8182 | |||||||
8183 | CheckCompletedCXXClass(cast<CXXRecordDecl>(TagDecl)); | ||||||
8184 | } | ||||||
8185 | |||||||
8186 | /// AddImplicitlyDeclaredMembersToClass - Adds any implicitly-declared | ||||||
8187 | /// special functions, such as the default constructor, copy | ||||||
8188 | /// constructor, or destructor, to the given C++ class (C++ | ||||||
8189 | /// [special]p1). This routine can only be executed just before the | ||||||
8190 | /// definition of the class is complete. | ||||||
8191 | void Sema::AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl) { | ||||||
8192 | if (ClassDecl->needsImplicitDefaultConstructor()) { | ||||||
8193 | ++getASTContext().NumImplicitDefaultConstructors; | ||||||
8194 | |||||||
8195 | if (ClassDecl->hasInheritedConstructor()) | ||||||
8196 | DeclareImplicitDefaultConstructor(ClassDecl); | ||||||
8197 | } | ||||||
8198 | |||||||
8199 | if (ClassDecl->needsImplicitCopyConstructor()) { | ||||||
8200 | ++getASTContext().NumImplicitCopyConstructors; | ||||||
8201 | |||||||
8202 | // If the properties or semantics of the copy constructor couldn't be | ||||||
8203 | // determined while the class was being declared, force a declaration | ||||||
8204 | // of it now. | ||||||
8205 | if (ClassDecl->needsOverloadResolutionForCopyConstructor() || | ||||||
8206 | ClassDecl->hasInheritedConstructor()) | ||||||
8207 | DeclareImplicitCopyConstructor(ClassDecl); | ||||||
8208 | // For the MS ABI we need to know whether the copy ctor is deleted. A | ||||||
8209 | // prerequisite for deleting the implicit copy ctor is that the class has a | ||||||
8210 | // move ctor or move assignment that is either user-declared or whose | ||||||
8211 | // semantics are inherited from a subobject. FIXME: We should provide a more | ||||||
8212 | // direct way for CodeGen to ask whether the constructor was deleted. | ||||||
8213 | else if (Context.getTargetInfo().getCXXABI().isMicrosoft() && | ||||||
8214 | (ClassDecl->hasUserDeclaredMoveConstructor() || | ||||||
8215 | ClassDecl->needsOverloadResolutionForMoveConstructor() || | ||||||
8216 | ClassDecl->hasUserDeclaredMoveAssignment() || | ||||||
8217 | ClassDecl->needsOverloadResolutionForMoveAssignment())) | ||||||
8218 | DeclareImplicitCopyConstructor(ClassDecl); | ||||||
8219 | } | ||||||
8220 | |||||||
8221 | if (getLangOpts().CPlusPlus11 && ClassDecl->needsImplicitMoveConstructor()) { | ||||||
8222 | ++getASTContext().NumImplicitMoveConstructors; | ||||||
8223 | |||||||
8224 | if (ClassDecl->needsOverloadResolutionForMoveConstructor() || | ||||||
8225 | ClassDecl->hasInheritedConstructor()) | ||||||
8226 | DeclareImplicitMoveConstructor(ClassDecl); | ||||||
8227 | } | ||||||
8228 | |||||||
8229 | if (ClassDecl->needsImplicitCopyAssignment()) { | ||||||
8230 | ++getASTContext().NumImplicitCopyAssignmentOperators; | ||||||
8231 | |||||||
8232 | // If we have a dynamic class, then the copy assignment operator may be | ||||||
8233 | // virtual, so we have to declare it immediately. This ensures that, e.g., | ||||||
8234 | // it shows up in the right place in the vtable and that we diagnose | ||||||
8235 | // problems with the implicit exception specification. | ||||||
8236 | if (ClassDecl->isDynamicClass() || | ||||||
8237 | ClassDecl->needsOverloadResolutionForCopyAssignment() || | ||||||
8238 | ClassDecl->hasInheritedAssignment()) | ||||||
8239 | DeclareImplicitCopyAssignment(ClassDecl); | ||||||
8240 | } | ||||||
8241 | |||||||
8242 | if (getLangOpts().CPlusPlus11 && ClassDecl->needsImplicitMoveAssignment()) { | ||||||
8243 | ++getASTContext().NumImplicitMoveAssignmentOperators; | ||||||
8244 | |||||||
8245 | // Likewise for the move assignment operator. | ||||||
8246 | if (ClassDecl->isDynamicClass() || | ||||||
8247 | ClassDecl->needsOverloadResolutionForMoveAssignment() || | ||||||
8248 | ClassDecl->hasInheritedAssignment()) | ||||||
8249 | DeclareImplicitMoveAssignment(ClassDecl); | ||||||
8250 | } | ||||||
8251 | |||||||
8252 | if (ClassDecl->needsImplicitDestructor()) { | ||||||
8253 | ++getASTContext().NumImplicitDestructors; | ||||||
8254 | |||||||
8255 | // If we have a dynamic class, then the destructor may be virtual, so we | ||||||
8256 | // have to declare the destructor immediately. This ensures that, e.g., it | ||||||
8257 | // shows up in the right place in the vtable and that we diagnose problems | ||||||
8258 | // with the implicit exception specification. | ||||||
8259 | if (ClassDecl->isDynamicClass() || | ||||||
8260 | ClassDecl->needsOverloadResolutionForDestructor()) | ||||||
8261 | DeclareImplicitDestructor(ClassDecl); | ||||||
8262 | } | ||||||
8263 | } | ||||||
8264 | |||||||
8265 | unsigned Sema::ActOnReenterTemplateScope(Scope *S, Decl *D) { | ||||||
8266 | if (!D) | ||||||
8267 | return 0; | ||||||
8268 | |||||||
8269 | // The order of template parameters is not important here. All names | ||||||
8270 | // get added to the same scope. | ||||||
8271 | SmallVector<TemplateParameterList *, 4> ParameterLists; | ||||||
8272 | |||||||
8273 | if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D)) | ||||||
8274 | D = TD->getTemplatedDecl(); | ||||||
8275 | |||||||
8276 | if (auto *PSD = dyn_cast<ClassTemplatePartialSpecializationDecl>(D)) | ||||||
8277 | ParameterLists.push_back(PSD->getTemplateParameters()); | ||||||
8278 | |||||||
8279 | if (DeclaratorDecl *DD = dyn_cast<DeclaratorDecl>(D)) { | ||||||
8280 | for (unsigned i = 0; i < DD->getNumTemplateParameterLists(); ++i) | ||||||
8281 | ParameterLists.push_back(DD->getTemplateParameterList(i)); | ||||||
8282 | |||||||
8283 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
8284 | if (FunctionTemplateDecl *FTD = FD->getDescribedFunctionTemplate()) | ||||||
8285 | ParameterLists.push_back(FTD->getTemplateParameters()); | ||||||
8286 | } | ||||||
8287 | } | ||||||
8288 | |||||||
8289 | if (TagDecl *TD = dyn_cast<TagDecl>(D)) { | ||||||
8290 | for (unsigned i = 0; i < TD->getNumTemplateParameterLists(); ++i) | ||||||
8291 | ParameterLists.push_back(TD->getTemplateParameterList(i)); | ||||||
8292 | |||||||
8293 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(TD)) { | ||||||
8294 | if (ClassTemplateDecl *CTD = RD->getDescribedClassTemplate()) | ||||||
8295 | ParameterLists.push_back(CTD->getTemplateParameters()); | ||||||
8296 | } | ||||||
8297 | } | ||||||
8298 | |||||||
8299 | unsigned Count = 0; | ||||||
8300 | for (TemplateParameterList *Params : ParameterLists) { | ||||||
8301 | if (Params->size() > 0) | ||||||
8302 | // Ignore explicit specializations; they don't contribute to the template | ||||||
8303 | // depth. | ||||||
8304 | ++Count; | ||||||
8305 | for (NamedDecl *Param : *Params) { | ||||||
8306 | if (Param->getDeclName()) { | ||||||
8307 | S->AddDecl(Param); | ||||||
8308 | IdResolver.AddDecl(Param); | ||||||
8309 | } | ||||||
8310 | } | ||||||
8311 | } | ||||||
8312 | |||||||
8313 | return Count; | ||||||
8314 | } | ||||||
8315 | |||||||
8316 | void Sema::ActOnStartDelayedMemberDeclarations(Scope *S, Decl *RecordD) { | ||||||
8317 | if (!RecordD) return; | ||||||
8318 | AdjustDeclIfTemplate(RecordD); | ||||||
8319 | CXXRecordDecl *Record = cast<CXXRecordDecl>(RecordD); | ||||||
8320 | PushDeclContext(S, Record); | ||||||
8321 | } | ||||||
8322 | |||||||
8323 | void Sema::ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *RecordD) { | ||||||
8324 | if (!RecordD) return; | ||||||
8325 | PopDeclContext(); | ||||||
8326 | } | ||||||
8327 | |||||||
8328 | /// This is used to implement the constant expression evaluation part of the | ||||||
8329 | /// attribute enable_if extension. There is nothing in standard C++ which would | ||||||
8330 | /// require reentering parameters. | ||||||
8331 | void Sema::ActOnReenterCXXMethodParameter(Scope *S, ParmVarDecl *Param) { | ||||||
8332 | if (!Param) | ||||||
8333 | return; | ||||||
8334 | |||||||
8335 | S->AddDecl(Param); | ||||||
8336 | if (Param->getDeclName()) | ||||||
8337 | IdResolver.AddDecl(Param); | ||||||
8338 | } | ||||||
8339 | |||||||
8340 | /// ActOnStartDelayedCXXMethodDeclaration - We have completed | ||||||
8341 | /// parsing a top-level (non-nested) C++ class, and we are now | ||||||
8342 | /// parsing those parts of the given Method declaration that could | ||||||
8343 | /// not be parsed earlier (C++ [class.mem]p2), such as default | ||||||
8344 | /// arguments. This action should enter the scope of the given | ||||||
8345 | /// Method declaration as if we had just parsed the qualified method | ||||||
8346 | /// name. However, it should not bring the parameters into scope; | ||||||
8347 | /// that will be performed by ActOnDelayedCXXMethodParameter. | ||||||
8348 | void Sema::ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *MethodD) { | ||||||
8349 | } | ||||||
8350 | |||||||
8351 | /// ActOnDelayedCXXMethodParameter - We've already started a delayed | ||||||
8352 | /// C++ method declaration. We're (re-)introducing the given | ||||||
8353 | /// function parameter into scope for use in parsing later parts of | ||||||
8354 | /// the method declaration. For example, we could see an | ||||||
8355 | /// ActOnParamDefaultArgument event for this parameter. | ||||||
8356 | void Sema::ActOnDelayedCXXMethodParameter(Scope *S, Decl *ParamD) { | ||||||
8357 | if (!ParamD) | ||||||
8358 | return; | ||||||
8359 | |||||||
8360 | ParmVarDecl *Param = cast<ParmVarDecl>(ParamD); | ||||||
8361 | |||||||
8362 | // If this parameter has an unparsed default argument, clear it out | ||||||
8363 | // to make way for the parsed default argument. | ||||||
8364 | if (Param->hasUnparsedDefaultArg()) | ||||||
8365 | Param->setDefaultArg(nullptr); | ||||||
8366 | |||||||
8367 | S->AddDecl(Param); | ||||||
8368 | if (Param->getDeclName()) | ||||||
8369 | IdResolver.AddDecl(Param); | ||||||
8370 | } | ||||||
8371 | |||||||
8372 | /// ActOnFinishDelayedCXXMethodDeclaration - We have finished | ||||||
8373 | /// processing the delayed method declaration for Method. The method | ||||||
8374 | /// declaration is now considered finished. There may be a separate | ||||||
8375 | /// ActOnStartOfFunctionDef action later (not necessarily | ||||||
8376 | /// immediately!) for this method, if it was also defined inside the | ||||||
8377 | /// class body. | ||||||
8378 | void Sema::ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *MethodD) { | ||||||
8379 | if (!MethodD) | ||||||
8380 | return; | ||||||
8381 | |||||||
8382 | AdjustDeclIfTemplate(MethodD); | ||||||
8383 | |||||||
8384 | FunctionDecl *Method = cast<FunctionDecl>(MethodD); | ||||||
8385 | |||||||
8386 | // Now that we have our default arguments, check the constructor | ||||||
8387 | // again. It could produce additional diagnostics or affect whether | ||||||
8388 | // the class has implicitly-declared destructors, among other | ||||||
8389 | // things. | ||||||
8390 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Method)) | ||||||
8391 | CheckConstructor(Constructor); | ||||||
8392 | |||||||
8393 | // Check the default arguments, which we may have added. | ||||||
8394 | if (!Method->isInvalidDecl()) | ||||||
8395 | CheckCXXDefaultArguments(Method); | ||||||
8396 | } | ||||||
8397 | |||||||
8398 | // Emit the given diagnostic for each non-address-space qualifier. | ||||||
8399 | // Common part of CheckConstructorDeclarator and CheckDestructorDeclarator. | ||||||
8400 | static void checkMethodTypeQualifiers(Sema &S, Declarator &D, unsigned DiagID) { | ||||||
8401 | const DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||
8402 | if (FTI.hasMethodTypeQualifiers() && !D.isInvalidType()) { | ||||||
8403 | bool DiagOccured = false; | ||||||
8404 | FTI.MethodQualifiers->forEachQualifier( | ||||||
8405 | [DiagID, &S, &DiagOccured](DeclSpec::TQ, StringRef QualName, | ||||||
8406 | SourceLocation SL) { | ||||||
8407 | // This diagnostic should be emitted on any qualifier except an addr | ||||||
8408 | // space qualifier. However, forEachQualifier currently doesn't visit | ||||||
8409 | // addr space qualifiers, so there's no way to write this condition | ||||||
8410 | // right now; we just diagnose on everything. | ||||||
8411 | S.Diag(SL, DiagID) << QualName << SourceRange(SL); | ||||||
8412 | DiagOccured = true; | ||||||
8413 | }); | ||||||
8414 | if (DiagOccured) | ||||||
8415 | D.setInvalidType(); | ||||||
8416 | } | ||||||
8417 | } | ||||||
8418 | |||||||
8419 | /// CheckConstructorDeclarator - Called by ActOnDeclarator to check | ||||||
8420 | /// the well-formedness of the constructor declarator @p D with type @p | ||||||
8421 | /// R. If there are any errors in the declarator, this routine will | ||||||
8422 | /// emit diagnostics and set the invalid bit to true. In any case, the type | ||||||
8423 | /// will be updated to reflect a well-formed type for the constructor and | ||||||
8424 | /// returned. | ||||||
8425 | QualType Sema::CheckConstructorDeclarator(Declarator &D, QualType R, | ||||||
8426 | StorageClass &SC) { | ||||||
8427 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); | ||||||
8428 | |||||||
8429 | // C++ [class.ctor]p3: | ||||||
8430 | // A constructor shall not be virtual (10.3) or static (9.4). A | ||||||
8431 | // constructor can be invoked for a const, volatile or const | ||||||
8432 | // volatile object. A constructor shall not be declared const, | ||||||
8433 | // volatile, or const volatile (9.3.2). | ||||||
8434 | if (isVirtual) { | ||||||
8435 | if (!D.isInvalidType()) | ||||||
8436 | Diag(D.getIdentifierLoc(), diag::err_constructor_cannot_be) | ||||||
8437 | << "virtual" << SourceRange(D.getDeclSpec().getVirtualSpecLoc()) | ||||||
8438 | << SourceRange(D.getIdentifierLoc()); | ||||||
8439 | D.setInvalidType(); | ||||||
8440 | } | ||||||
8441 | if (SC == SC_Static) { | ||||||
8442 | if (!D.isInvalidType()) | ||||||
8443 | Diag(D.getIdentifierLoc(), diag::err_constructor_cannot_be) | ||||||
8444 | << "static" << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||||
8445 | << SourceRange(D.getIdentifierLoc()); | ||||||
8446 | D.setInvalidType(); | ||||||
8447 | SC = SC_None; | ||||||
8448 | } | ||||||
8449 | |||||||
8450 | if (unsigned TypeQuals = D.getDeclSpec().getTypeQualifiers()) { | ||||||
8451 | diagnoseIgnoredQualifiers( | ||||||
8452 | diag::err_constructor_return_type, TypeQuals, SourceLocation(), | ||||||
8453 | D.getDeclSpec().getConstSpecLoc(), D.getDeclSpec().getVolatileSpecLoc(), | ||||||
8454 | D.getDeclSpec().getRestrictSpecLoc(), | ||||||
8455 | D.getDeclSpec().getAtomicSpecLoc()); | ||||||
8456 | D.setInvalidType(); | ||||||
8457 | } | ||||||
8458 | |||||||
8459 | checkMethodTypeQualifiers(*this, D, diag::err_invalid_qualified_constructor); | ||||||
8460 | |||||||
8461 | // C++0x [class.ctor]p4: | ||||||
8462 | // A constructor shall not be declared with a ref-qualifier. | ||||||
8463 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||
8464 | if (FTI.hasRefQualifier()) { | ||||||
8465 | Diag(FTI.getRefQualifierLoc(), diag::err_ref_qualifier_constructor) | ||||||
8466 | << FTI.RefQualifierIsLValueRef | ||||||
8467 | << FixItHint::CreateRemoval(FTI.getRefQualifierLoc()); | ||||||
8468 | D.setInvalidType(); | ||||||
8469 | } | ||||||
8470 | |||||||
8471 | // Rebuild the function type "R" without any type qualifiers (in | ||||||
8472 | // case any of the errors above fired) and with "void" as the | ||||||
8473 | // return type, since constructors don't have return types. | ||||||
8474 | const FunctionProtoType *Proto = R->getAs<FunctionProtoType>(); | ||||||
8475 | if (Proto->getReturnType() == Context.VoidTy && !D.isInvalidType()) | ||||||
8476 | return R; | ||||||
8477 | |||||||
8478 | FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo(); | ||||||
8479 | EPI.TypeQuals = Qualifiers(); | ||||||
8480 | EPI.RefQualifier = RQ_None; | ||||||
8481 | |||||||
8482 | return Context.getFunctionType(Context.VoidTy, Proto->getParamTypes(), EPI); | ||||||
8483 | } | ||||||
8484 | |||||||
8485 | /// CheckConstructor - Checks a fully-formed constructor for | ||||||
8486 | /// well-formedness, issuing any diagnostics required. Returns true if | ||||||
8487 | /// the constructor declarator is invalid. | ||||||
8488 | void Sema::CheckConstructor(CXXConstructorDecl *Constructor) { | ||||||
8489 | CXXRecordDecl *ClassDecl | ||||||
8490 | = dyn_cast<CXXRecordDecl>(Constructor->getDeclContext()); | ||||||
8491 | if (!ClassDecl) | ||||||
8492 | return Constructor->setInvalidDecl(); | ||||||
8493 | |||||||
8494 | // C++ [class.copy]p3: | ||||||
8495 | // A declaration of a constructor for a class X is ill-formed if | ||||||
8496 | // its first parameter is of type (optionally cv-qualified) X and | ||||||
8497 | // either there are no other parameters or else all other | ||||||
8498 | // parameters have default arguments. | ||||||
8499 | if (!Constructor->isInvalidDecl() && | ||||||
8500 | ((Constructor->getNumParams() == 1) || | ||||||
8501 | (Constructor->getNumParams() > 1 && | ||||||
8502 | Constructor->getParamDecl(1)->hasDefaultArg())) && | ||||||
8503 | Constructor->getTemplateSpecializationKind() | ||||||
8504 | != TSK_ImplicitInstantiation) { | ||||||
8505 | QualType ParamType = Constructor->getParamDecl(0)->getType(); | ||||||
8506 | QualType ClassTy = Context.getTagDeclType(ClassDecl); | ||||||
8507 | if (Context.getCanonicalType(ParamType).getUnqualifiedType() == ClassTy) { | ||||||
8508 | SourceLocation ParamLoc = Constructor->getParamDecl(0)->getLocation(); | ||||||
8509 | const char *ConstRef | ||||||
8510 | = Constructor->getParamDecl(0)->getIdentifier() ? "const &" | ||||||
8511 | : " const &"; | ||||||
8512 | Diag(ParamLoc, diag::err_constructor_byvalue_arg) | ||||||
8513 | << FixItHint::CreateInsertion(ParamLoc, ConstRef); | ||||||
8514 | |||||||
8515 | // FIXME: Rather that making the constructor invalid, we should endeavor | ||||||
8516 | // to fix the type. | ||||||
8517 | Constructor->setInvalidDecl(); | ||||||
8518 | } | ||||||
8519 | } | ||||||
8520 | } | ||||||
8521 | |||||||
8522 | /// CheckDestructor - Checks a fully-formed destructor definition for | ||||||
8523 | /// well-formedness, issuing any diagnostics required. Returns true | ||||||
8524 | /// on error. | ||||||
8525 | bool Sema::CheckDestructor(CXXDestructorDecl *Destructor) { | ||||||
8526 | CXXRecordDecl *RD = Destructor->getParent(); | ||||||
8527 | |||||||
8528 | if (!Destructor->getOperatorDelete() && Destructor->isVirtual()) { | ||||||
8529 | SourceLocation Loc; | ||||||
8530 | |||||||
8531 | if (!Destructor->isImplicit()) | ||||||
8532 | Loc = Destructor->getLocation(); | ||||||
8533 | else | ||||||
8534 | Loc = RD->getLocation(); | ||||||
8535 | |||||||
8536 | // If we have a virtual destructor, look up the deallocation function | ||||||
8537 | if (FunctionDecl *OperatorDelete = | ||||||
8538 | FindDeallocationFunctionForDestructor(Loc, RD)) { | ||||||
8539 | Expr *ThisArg = nullptr; | ||||||
8540 | |||||||
8541 | // If the notional 'delete this' expression requires a non-trivial | ||||||
8542 | // conversion from 'this' to the type of a destroying operator delete's | ||||||
8543 | // first parameter, perform that conversion now. | ||||||
8544 | if (OperatorDelete->isDestroyingOperatorDelete()) { | ||||||
8545 | QualType ParamType = OperatorDelete->getParamDecl(0)->getType(); | ||||||
8546 | if (!declaresSameEntity(ParamType->getAsCXXRecordDecl(), RD)) { | ||||||
8547 | // C++ [class.dtor]p13: | ||||||
8548 | // ... as if for the expression 'delete this' appearing in a | ||||||
8549 | // non-virtual destructor of the destructor's class. | ||||||
8550 | ContextRAII SwitchContext(*this, Destructor); | ||||||
8551 | ExprResult This = | ||||||
8552 | ActOnCXXThis(OperatorDelete->getParamDecl(0)->getLocation()); | ||||||
8553 | assert(!This.isInvalid() && "couldn't form 'this' expr in dtor?")((!This.isInvalid() && "couldn't form 'this' expr in dtor?" ) ? static_cast<void> (0) : __assert_fail ("!This.isInvalid() && \"couldn't form 'this' expr in dtor?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 8553, __PRETTY_FUNCTION__)); | ||||||
8554 | This = PerformImplicitConversion(This.get(), ParamType, AA_Passing); | ||||||
8555 | if (This.isInvalid()) { | ||||||
8556 | // FIXME: Register this as a context note so that it comes out | ||||||
8557 | // in the right order. | ||||||
8558 | Diag(Loc, diag::note_implicit_delete_this_in_destructor_here); | ||||||
8559 | return true; | ||||||
8560 | } | ||||||
8561 | ThisArg = This.get(); | ||||||
8562 | } | ||||||
8563 | } | ||||||
8564 | |||||||
8565 | DiagnoseUseOfDecl(OperatorDelete, Loc); | ||||||
8566 | MarkFunctionReferenced(Loc, OperatorDelete); | ||||||
8567 | Destructor->setOperatorDelete(OperatorDelete, ThisArg); | ||||||
8568 | } | ||||||
8569 | } | ||||||
8570 | |||||||
8571 | return false; | ||||||
8572 | } | ||||||
8573 | |||||||
8574 | /// CheckDestructorDeclarator - Called by ActOnDeclarator to check | ||||||
8575 | /// the well-formednes of the destructor declarator @p D with type @p | ||||||
8576 | /// R. If there are any errors in the declarator, this routine will | ||||||
8577 | /// emit diagnostics and set the declarator to invalid. Even if this happens, | ||||||
8578 | /// will be updated to reflect a well-formed type for the destructor and | ||||||
8579 | /// returned. | ||||||
8580 | QualType Sema::CheckDestructorDeclarator(Declarator &D, QualType R, | ||||||
8581 | StorageClass& SC) { | ||||||
8582 | // C++ [class.dtor]p1: | ||||||
8583 | // [...] A typedef-name that names a class is a class-name | ||||||
8584 | // (7.1.3); however, a typedef-name that names a class shall not | ||||||
8585 | // be used as the identifier in the declarator for a destructor | ||||||
8586 | // declaration. | ||||||
8587 | QualType DeclaratorType = GetTypeFromParser(D.getName().DestructorName); | ||||||
8588 | if (const TypedefType *TT = DeclaratorType->getAs<TypedefType>()) | ||||||
8589 | Diag(D.getIdentifierLoc(), diag::err_destructor_typedef_name) | ||||||
8590 | << DeclaratorType << isa<TypeAliasDecl>(TT->getDecl()); | ||||||
8591 | else if (const TemplateSpecializationType *TST = | ||||||
8592 | DeclaratorType->getAs<TemplateSpecializationType>()) | ||||||
8593 | if (TST->isTypeAlias()) | ||||||
8594 | Diag(D.getIdentifierLoc(), diag::err_destructor_typedef_name) | ||||||
8595 | << DeclaratorType << 1; | ||||||
8596 | |||||||
8597 | // C++ [class.dtor]p2: | ||||||
8598 | // A destructor is used to destroy objects of its class type. A | ||||||
8599 | // destructor takes no parameters, and no return type can be | ||||||
8600 | // specified for it (not even void). The address of a destructor | ||||||
8601 | // shall not be taken. A destructor shall not be static. A | ||||||
8602 | // destructor can be invoked for a const, volatile or const | ||||||
8603 | // volatile object. A destructor shall not be declared const, | ||||||
8604 | // volatile or const volatile (9.3.2). | ||||||
8605 | if (SC == SC_Static) { | ||||||
8606 | if (!D.isInvalidType()) | ||||||
8607 | Diag(D.getIdentifierLoc(), diag::err_destructor_cannot_be) | ||||||
8608 | << "static" << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||||
8609 | << SourceRange(D.getIdentifierLoc()) | ||||||
8610 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
8611 | |||||||
8612 | SC = SC_None; | ||||||
8613 | } | ||||||
8614 | if (!D.isInvalidType()) { | ||||||
8615 | // Destructors don't have return types, but the parser will | ||||||
8616 | // happily parse something like: | ||||||
8617 | // | ||||||
8618 | // class X { | ||||||
8619 | // float ~X(); | ||||||
8620 | // }; | ||||||
8621 | // | ||||||
8622 | // The return type will be eliminated later. | ||||||
8623 | if (D.getDeclSpec().hasTypeSpecifier()) | ||||||
8624 | Diag(D.getIdentifierLoc(), diag::err_destructor_return_type) | ||||||
8625 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) | ||||||
8626 | << SourceRange(D.getIdentifierLoc()); | ||||||
8627 | else if (unsigned TypeQuals = D.getDeclSpec().getTypeQualifiers()) { | ||||||
8628 | diagnoseIgnoredQualifiers(diag::err_destructor_return_type, TypeQuals, | ||||||
8629 | SourceLocation(), | ||||||
8630 | D.getDeclSpec().getConstSpecLoc(), | ||||||
8631 | D.getDeclSpec().getVolatileSpecLoc(), | ||||||
8632 | D.getDeclSpec().getRestrictSpecLoc(), | ||||||
8633 | D.getDeclSpec().getAtomicSpecLoc()); | ||||||
8634 | D.setInvalidType(); | ||||||
8635 | } | ||||||
8636 | } | ||||||
8637 | |||||||
8638 | checkMethodTypeQualifiers(*this, D, diag::err_invalid_qualified_destructor); | ||||||
8639 | |||||||
8640 | // C++0x [class.dtor]p2: | ||||||
8641 | // A destructor shall not be declared with a ref-qualifier. | ||||||
8642 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||
8643 | if (FTI.hasRefQualifier()) { | ||||||
8644 | Diag(FTI.getRefQualifierLoc(), diag::err_ref_qualifier_destructor) | ||||||
8645 | << FTI.RefQualifierIsLValueRef | ||||||
8646 | << FixItHint::CreateRemoval(FTI.getRefQualifierLoc()); | ||||||
8647 | D.setInvalidType(); | ||||||
8648 | } | ||||||
8649 | |||||||
8650 | // Make sure we don't have any parameters. | ||||||
8651 | if (FTIHasNonVoidParameters(FTI)) { | ||||||
8652 | Diag(D.getIdentifierLoc(), diag::err_destructor_with_params); | ||||||
8653 | |||||||
8654 | // Delete the parameters. | ||||||
8655 | FTI.freeParams(); | ||||||
8656 | D.setInvalidType(); | ||||||
8657 | } | ||||||
8658 | |||||||
8659 | // Make sure the destructor isn't variadic. | ||||||
8660 | if (FTI.isVariadic) { | ||||||
8661 | Diag(D.getIdentifierLoc(), diag::err_destructor_variadic); | ||||||
8662 | D.setInvalidType(); | ||||||
8663 | } | ||||||
8664 | |||||||
8665 | // Rebuild the function type "R" without any type qualifiers or | ||||||
8666 | // parameters (in case any of the errors above fired) and with | ||||||
8667 | // "void" as the return type, since destructors don't have return | ||||||
8668 | // types. | ||||||
8669 | if (!D.isInvalidType()) | ||||||
8670 | return R; | ||||||
8671 | |||||||
8672 | const FunctionProtoType *Proto = R->getAs<FunctionProtoType>(); | ||||||
8673 | FunctionProtoType::ExtProtoInfo EPI = Proto->getExtProtoInfo(); | ||||||
8674 | EPI.Variadic = false; | ||||||
8675 | EPI.TypeQuals = Qualifiers(); | ||||||
8676 | EPI.RefQualifier = RQ_None; | ||||||
8677 | return Context.getFunctionType(Context.VoidTy, None, EPI); | ||||||
8678 | } | ||||||
8679 | |||||||
8680 | static void extendLeft(SourceRange &R, SourceRange Before) { | ||||||
8681 | if (Before.isInvalid()) | ||||||
8682 | return; | ||||||
8683 | R.setBegin(Before.getBegin()); | ||||||
8684 | if (R.getEnd().isInvalid()) | ||||||
8685 | R.setEnd(Before.getEnd()); | ||||||
8686 | } | ||||||
8687 | |||||||
8688 | static void extendRight(SourceRange &R, SourceRange After) { | ||||||
8689 | if (After.isInvalid()) | ||||||
8690 | return; | ||||||
8691 | if (R.getBegin().isInvalid()) | ||||||
8692 | R.setBegin(After.getBegin()); | ||||||
8693 | R.setEnd(After.getEnd()); | ||||||
8694 | } | ||||||
8695 | |||||||
8696 | /// CheckConversionDeclarator - Called by ActOnDeclarator to check the | ||||||
8697 | /// well-formednes of the conversion function declarator @p D with | ||||||
8698 | /// type @p R. If there are any errors in the declarator, this routine | ||||||
8699 | /// will emit diagnostics and return true. Otherwise, it will return | ||||||
8700 | /// false. Either way, the type @p R will be updated to reflect a | ||||||
8701 | /// well-formed type for the conversion operator. | ||||||
8702 | void Sema::CheckConversionDeclarator(Declarator &D, QualType &R, | ||||||
8703 | StorageClass& SC) { | ||||||
8704 | // C++ [class.conv.fct]p1: | ||||||
8705 | // Neither parameter types nor return type can be specified. The | ||||||
8706 | // type of a conversion function (8.3.5) is "function taking no | ||||||
8707 | // parameter returning conversion-type-id." | ||||||
8708 | if (SC == SC_Static) { | ||||||
8709 | if (!D.isInvalidType()) | ||||||
8710 | Diag(D.getIdentifierLoc(), diag::err_conv_function_not_member) | ||||||
8711 | << SourceRange(D.getDeclSpec().getStorageClassSpecLoc()) | ||||||
8712 | << D.getName().getSourceRange(); | ||||||
8713 | D.setInvalidType(); | ||||||
8714 | SC = SC_None; | ||||||
8715 | } | ||||||
8716 | |||||||
8717 | TypeSourceInfo *ConvTSI = nullptr; | ||||||
8718 | QualType ConvType = | ||||||
8719 | GetTypeFromParser(D.getName().ConversionFunctionId, &ConvTSI); | ||||||
8720 | |||||||
8721 | const DeclSpec &DS = D.getDeclSpec(); | ||||||
8722 | if (DS.hasTypeSpecifier() && !D.isInvalidType()) { | ||||||
8723 | // Conversion functions don't have return types, but the parser will | ||||||
8724 | // happily parse something like: | ||||||
8725 | // | ||||||
8726 | // class X { | ||||||
8727 | // float operator bool(); | ||||||
8728 | // }; | ||||||
8729 | // | ||||||
8730 | // The return type will be changed later anyway. | ||||||
8731 | Diag(D.getIdentifierLoc(), diag::err_conv_function_return_type) | ||||||
8732 | << SourceRange(DS.getTypeSpecTypeLoc()) | ||||||
8733 | << SourceRange(D.getIdentifierLoc()); | ||||||
8734 | D.setInvalidType(); | ||||||
8735 | } else if (DS.getTypeQualifiers() && !D.isInvalidType()) { | ||||||
8736 | // It's also plausible that the user writes type qualifiers in the wrong | ||||||
8737 | // place, such as: | ||||||
8738 | // struct S { const operator int(); }; | ||||||
8739 | // FIXME: we could provide a fixit to move the qualifiers onto the | ||||||
8740 | // conversion type. | ||||||
8741 | Diag(D.getIdentifierLoc(), diag::err_conv_function_with_complex_decl) | ||||||
8742 | << SourceRange(D.getIdentifierLoc()) << 0; | ||||||
8743 | D.setInvalidType(); | ||||||
8744 | } | ||||||
8745 | |||||||
8746 | const FunctionProtoType *Proto = R->getAs<FunctionProtoType>(); | ||||||
8747 | |||||||
8748 | // Make sure we don't have any parameters. | ||||||
8749 | if (Proto->getNumParams() > 0) { | ||||||
8750 | Diag(D.getIdentifierLoc(), diag::err_conv_function_with_params); | ||||||
8751 | |||||||
8752 | // Delete the parameters. | ||||||
8753 | D.getFunctionTypeInfo().freeParams(); | ||||||
8754 | D.setInvalidType(); | ||||||
8755 | } else if (Proto->isVariadic()) { | ||||||
8756 | Diag(D.getIdentifierLoc(), diag::err_conv_function_variadic); | ||||||
8757 | D.setInvalidType(); | ||||||
8758 | } | ||||||
8759 | |||||||
8760 | // Diagnose "&operator bool()" and other such nonsense. This | ||||||
8761 | // is actually a gcc extension which we don't support. | ||||||
8762 | if (Proto->getReturnType() != ConvType) { | ||||||
8763 | bool NeedsTypedef = false; | ||||||
8764 | SourceRange Before, After; | ||||||
8765 | |||||||
8766 | // Walk the chunks and extract information on them for our diagnostic. | ||||||
8767 | bool PastFunctionChunk = false; | ||||||
8768 | for (auto &Chunk : D.type_objects()) { | ||||||
8769 | switch (Chunk.Kind) { | ||||||
8770 | case DeclaratorChunk::Function: | ||||||
8771 | if (!PastFunctionChunk) { | ||||||
8772 | if (Chunk.Fun.HasTrailingReturnType) { | ||||||
8773 | TypeSourceInfo *TRT = nullptr; | ||||||
8774 | GetTypeFromParser(Chunk.Fun.getTrailingReturnType(), &TRT); | ||||||
8775 | if (TRT) extendRight(After, TRT->getTypeLoc().getSourceRange()); | ||||||
8776 | } | ||||||
8777 | PastFunctionChunk = true; | ||||||
8778 | break; | ||||||
8779 | } | ||||||
8780 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
8781 | case DeclaratorChunk::Array: | ||||||
8782 | NeedsTypedef = true; | ||||||
8783 | extendRight(After, Chunk.getSourceRange()); | ||||||
8784 | break; | ||||||
8785 | |||||||
8786 | case DeclaratorChunk::Pointer: | ||||||
8787 | case DeclaratorChunk::BlockPointer: | ||||||
8788 | case DeclaratorChunk::Reference: | ||||||
8789 | case DeclaratorChunk::MemberPointer: | ||||||
8790 | case DeclaratorChunk::Pipe: | ||||||
8791 | extendLeft(Before, Chunk.getSourceRange()); | ||||||
8792 | break; | ||||||
8793 | |||||||
8794 | case DeclaratorChunk::Paren: | ||||||
8795 | extendLeft(Before, Chunk.Loc); | ||||||
8796 | extendRight(After, Chunk.EndLoc); | ||||||
8797 | break; | ||||||
8798 | } | ||||||
8799 | } | ||||||
8800 | |||||||
8801 | SourceLocation Loc = Before.isValid() ? Before.getBegin() : | ||||||
8802 | After.isValid() ? After.getBegin() : | ||||||
8803 | D.getIdentifierLoc(); | ||||||
8804 | auto &&DB = Diag(Loc, diag::err_conv_function_with_complex_decl); | ||||||
8805 | DB << Before << After; | ||||||
8806 | |||||||
8807 | if (!NeedsTypedef) { | ||||||
8808 | DB << /*don't need a typedef*/0; | ||||||
8809 | |||||||
8810 | // If we can provide a correct fix-it hint, do so. | ||||||
8811 | if (After.isInvalid() && ConvTSI) { | ||||||
8812 | SourceLocation InsertLoc = | ||||||
8813 | getLocForEndOfToken(ConvTSI->getTypeLoc().getEndLoc()); | ||||||
8814 | DB << FixItHint::CreateInsertion(InsertLoc, " ") | ||||||
8815 | << FixItHint::CreateInsertionFromRange( | ||||||
8816 | InsertLoc, CharSourceRange::getTokenRange(Before)) | ||||||
8817 | << FixItHint::CreateRemoval(Before); | ||||||
8818 | } | ||||||
8819 | } else if (!Proto->getReturnType()->isDependentType()) { | ||||||
8820 | DB << /*typedef*/1 << Proto->getReturnType(); | ||||||
8821 | } else if (getLangOpts().CPlusPlus11) { | ||||||
8822 | DB << /*alias template*/2 << Proto->getReturnType(); | ||||||
8823 | } else { | ||||||
8824 | DB << /*might not be fixable*/3; | ||||||
8825 | } | ||||||
8826 | |||||||
8827 | // Recover by incorporating the other type chunks into the result type. | ||||||
8828 | // Note, this does *not* change the name of the function. This is compatible | ||||||
8829 | // with the GCC extension: | ||||||
8830 | // struct S { &operator int(); } s; | ||||||
8831 | // int &r = s.operator int(); // ok in GCC | ||||||
8832 | // S::operator int&() {} // error in GCC, function name is 'operator int'. | ||||||
8833 | ConvType = Proto->getReturnType(); | ||||||
8834 | } | ||||||
8835 | |||||||
8836 | // C++ [class.conv.fct]p4: | ||||||
8837 | // The conversion-type-id shall not represent a function type nor | ||||||
8838 | // an array type. | ||||||
8839 | if (ConvType->isArrayType()) { | ||||||
8840 | Diag(D.getIdentifierLoc(), diag::err_conv_function_to_array); | ||||||
8841 | ConvType = Context.getPointerType(ConvType); | ||||||
8842 | D.setInvalidType(); | ||||||
8843 | } else if (ConvType->isFunctionType()) { | ||||||
8844 | Diag(D.getIdentifierLoc(), diag::err_conv_function_to_function); | ||||||
8845 | ConvType = Context.getPointerType(ConvType); | ||||||
8846 | D.setInvalidType(); | ||||||
8847 | } | ||||||
8848 | |||||||
8849 | // Rebuild the function type "R" without any parameters (in case any | ||||||
8850 | // of the errors above fired) and with the conversion type as the | ||||||
8851 | // return type. | ||||||
8852 | if (D.isInvalidType()) | ||||||
8853 | R = Context.getFunctionType(ConvType, None, Proto->getExtProtoInfo()); | ||||||
8854 | |||||||
8855 | // C++0x explicit conversion operators. | ||||||
8856 | if (DS.hasExplicitSpecifier() && !getLangOpts().CPlusPlus2a) | ||||||
8857 | Diag(DS.getExplicitSpecLoc(), | ||||||
8858 | getLangOpts().CPlusPlus11 | ||||||
8859 | ? diag::warn_cxx98_compat_explicit_conversion_functions | ||||||
8860 | : diag::ext_explicit_conversion_functions) | ||||||
8861 | << SourceRange(DS.getExplicitSpecRange()); | ||||||
8862 | } | ||||||
8863 | |||||||
8864 | /// ActOnConversionDeclarator - Called by ActOnDeclarator to complete | ||||||
8865 | /// the declaration of the given C++ conversion function. This routine | ||||||
8866 | /// is responsible for recording the conversion function in the C++ | ||||||
8867 | /// class, if possible. | ||||||
8868 | Decl *Sema::ActOnConversionDeclarator(CXXConversionDecl *Conversion) { | ||||||
8869 | assert(Conversion && "Expected to receive a conversion function declaration")((Conversion && "Expected to receive a conversion function declaration" ) ? static_cast<void> (0) : __assert_fail ("Conversion && \"Expected to receive a conversion function declaration\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 8869, __PRETTY_FUNCTION__)); | ||||||
8870 | |||||||
8871 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(Conversion->getDeclContext()); | ||||||
8872 | |||||||
8873 | // Make sure we aren't redeclaring the conversion function. | ||||||
8874 | QualType ConvType = Context.getCanonicalType(Conversion->getConversionType()); | ||||||
8875 | |||||||
8876 | // C++ [class.conv.fct]p1: | ||||||
8877 | // [...] A conversion function is never used to convert a | ||||||
8878 | // (possibly cv-qualified) object to the (possibly cv-qualified) | ||||||
8879 | // same object type (or a reference to it), to a (possibly | ||||||
8880 | // cv-qualified) base class of that type (or a reference to it), | ||||||
8881 | // or to (possibly cv-qualified) void. | ||||||
8882 | // FIXME: Suppress this warning if the conversion function ends up being a | ||||||
8883 | // virtual function that overrides a virtual function in a base class. | ||||||
8884 | QualType ClassType | ||||||
8885 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||||
8886 | if (const ReferenceType *ConvTypeRef = ConvType->getAs<ReferenceType>()) | ||||||
8887 | ConvType = ConvTypeRef->getPointeeType(); | ||||||
8888 | if (Conversion->getTemplateSpecializationKind() != TSK_Undeclared && | ||||||
8889 | Conversion->getTemplateSpecializationKind() != TSK_ExplicitSpecialization) | ||||||
8890 | /* Suppress diagnostics for instantiations. */; | ||||||
8891 | else if (ConvType->isRecordType()) { | ||||||
8892 | ConvType = Context.getCanonicalType(ConvType).getUnqualifiedType(); | ||||||
8893 | if (ConvType == ClassType) | ||||||
8894 | Diag(Conversion->getLocation(), diag::warn_conv_to_self_not_used) | ||||||
8895 | << ClassType; | ||||||
8896 | else if (IsDerivedFrom(Conversion->getLocation(), ClassType, ConvType)) | ||||||
8897 | Diag(Conversion->getLocation(), diag::warn_conv_to_base_not_used) | ||||||
8898 | << ClassType << ConvType; | ||||||
8899 | } else if (ConvType->isVoidType()) { | ||||||
8900 | Diag(Conversion->getLocation(), diag::warn_conv_to_void_not_used) | ||||||
8901 | << ClassType << ConvType; | ||||||
8902 | } | ||||||
8903 | |||||||
8904 | if (FunctionTemplateDecl *ConversionTemplate | ||||||
8905 | = Conversion->getDescribedFunctionTemplate()) | ||||||
8906 | return ConversionTemplate; | ||||||
8907 | |||||||
8908 | return Conversion; | ||||||
8909 | } | ||||||
8910 | |||||||
8911 | namespace { | ||||||
8912 | /// Utility class to accumulate and print a diagnostic listing the invalid | ||||||
8913 | /// specifier(s) on a declaration. | ||||||
8914 | struct BadSpecifierDiagnoser { | ||||||
8915 | BadSpecifierDiagnoser(Sema &S, SourceLocation Loc, unsigned DiagID) | ||||||
8916 | : S(S), Diagnostic(S.Diag(Loc, DiagID)) {} | ||||||
8917 | ~BadSpecifierDiagnoser() { | ||||||
8918 | Diagnostic << Specifiers; | ||||||
8919 | } | ||||||
8920 | |||||||
8921 | template<typename T> void check(SourceLocation SpecLoc, T Spec) { | ||||||
8922 | return check(SpecLoc, DeclSpec::getSpecifierName(Spec)); | ||||||
8923 | } | ||||||
8924 | void check(SourceLocation SpecLoc, DeclSpec::TST Spec) { | ||||||
8925 | return check(SpecLoc, | ||||||
8926 | DeclSpec::getSpecifierName(Spec, S.getPrintingPolicy())); | ||||||
8927 | } | ||||||
8928 | void check(SourceLocation SpecLoc, const char *Spec) { | ||||||
8929 | if (SpecLoc.isInvalid()) return; | ||||||
8930 | Diagnostic << SourceRange(SpecLoc, SpecLoc); | ||||||
8931 | if (!Specifiers.empty()) Specifiers += " "; | ||||||
8932 | Specifiers += Spec; | ||||||
8933 | } | ||||||
8934 | |||||||
8935 | Sema &S; | ||||||
8936 | Sema::SemaDiagnosticBuilder Diagnostic; | ||||||
8937 | std::string Specifiers; | ||||||
8938 | }; | ||||||
8939 | } | ||||||
8940 | |||||||
8941 | /// Check the validity of a declarator that we parsed for a deduction-guide. | ||||||
8942 | /// These aren't actually declarators in the grammar, so we need to check that | ||||||
8943 | /// the user didn't specify any pieces that are not part of the deduction-guide | ||||||
8944 | /// grammar. | ||||||
8945 | void Sema::CheckDeductionGuideDeclarator(Declarator &D, QualType &R, | ||||||
8946 | StorageClass &SC) { | ||||||
8947 | TemplateName GuidedTemplate = D.getName().TemplateName.get().get(); | ||||||
8948 | TemplateDecl *GuidedTemplateDecl = GuidedTemplate.getAsTemplateDecl(); | ||||||
8949 | assert(GuidedTemplateDecl && "missing template decl for deduction guide")((GuidedTemplateDecl && "missing template decl for deduction guide" ) ? static_cast<void> (0) : __assert_fail ("GuidedTemplateDecl && \"missing template decl for deduction guide\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 8949, __PRETTY_FUNCTION__)); | ||||||
8950 | |||||||
8951 | // C++ [temp.deduct.guide]p3: | ||||||
8952 | // A deduction-gide shall be declared in the same scope as the | ||||||
8953 | // corresponding class template. | ||||||
8954 | if (!CurContext->getRedeclContext()->Equals( | ||||||
8955 | GuidedTemplateDecl->getDeclContext()->getRedeclContext())) { | ||||||
8956 | Diag(D.getIdentifierLoc(), diag::err_deduction_guide_wrong_scope) | ||||||
8957 | << GuidedTemplateDecl; | ||||||
8958 | Diag(GuidedTemplateDecl->getLocation(), diag::note_template_decl_here); | ||||||
8959 | } | ||||||
8960 | |||||||
8961 | auto &DS = D.getMutableDeclSpec(); | ||||||
8962 | // We leave 'friend' and 'virtual' to be rejected in the normal way. | ||||||
8963 | if (DS.hasTypeSpecifier() || DS.getTypeQualifiers() || | ||||||
8964 | DS.getStorageClassSpecLoc().isValid() || DS.isInlineSpecified() || | ||||||
8965 | DS.isNoreturnSpecified() || DS.hasConstexprSpecifier()) { | ||||||
8966 | BadSpecifierDiagnoser Diagnoser( | ||||||
8967 | *this, D.getIdentifierLoc(), | ||||||
8968 | diag::err_deduction_guide_invalid_specifier); | ||||||
8969 | |||||||
8970 | Diagnoser.check(DS.getStorageClassSpecLoc(), DS.getStorageClassSpec()); | ||||||
8971 | DS.ClearStorageClassSpecs(); | ||||||
8972 | SC = SC_None; | ||||||
8973 | |||||||
8974 | // 'explicit' is permitted. | ||||||
8975 | Diagnoser.check(DS.getInlineSpecLoc(), "inline"); | ||||||
8976 | Diagnoser.check(DS.getNoreturnSpecLoc(), "_Noreturn"); | ||||||
8977 | Diagnoser.check(DS.getConstexprSpecLoc(), "constexpr"); | ||||||
8978 | DS.ClearConstexprSpec(); | ||||||
8979 | |||||||
8980 | Diagnoser.check(DS.getConstSpecLoc(), "const"); | ||||||
8981 | Diagnoser.check(DS.getRestrictSpecLoc(), "__restrict"); | ||||||
8982 | Diagnoser.check(DS.getVolatileSpecLoc(), "volatile"); | ||||||
8983 | Diagnoser.check(DS.getAtomicSpecLoc(), "_Atomic"); | ||||||
8984 | Diagnoser.check(DS.getUnalignedSpecLoc(), "__unaligned"); | ||||||
8985 | DS.ClearTypeQualifiers(); | ||||||
8986 | |||||||
8987 | Diagnoser.check(DS.getTypeSpecComplexLoc(), DS.getTypeSpecComplex()); | ||||||
8988 | Diagnoser.check(DS.getTypeSpecSignLoc(), DS.getTypeSpecSign()); | ||||||
8989 | Diagnoser.check(DS.getTypeSpecWidthLoc(), DS.getTypeSpecWidth()); | ||||||
8990 | Diagnoser.check(DS.getTypeSpecTypeLoc(), DS.getTypeSpecType()); | ||||||
8991 | DS.ClearTypeSpecType(); | ||||||
8992 | } | ||||||
8993 | |||||||
8994 | if (D.isInvalidType()) | ||||||
8995 | return; | ||||||
8996 | |||||||
8997 | // Check the declarator is simple enough. | ||||||
8998 | bool FoundFunction = false; | ||||||
8999 | for (const DeclaratorChunk &Chunk : llvm::reverse(D.type_objects())) { | ||||||
9000 | if (Chunk.Kind == DeclaratorChunk::Paren) | ||||||
9001 | continue; | ||||||
9002 | if (Chunk.Kind != DeclaratorChunk::Function || FoundFunction) { | ||||||
9003 | Diag(D.getDeclSpec().getBeginLoc(), | ||||||
9004 | diag::err_deduction_guide_with_complex_decl) | ||||||
9005 | << D.getSourceRange(); | ||||||
9006 | break; | ||||||
9007 | } | ||||||
9008 | if (!Chunk.Fun.hasTrailingReturnType()) { | ||||||
9009 | Diag(D.getName().getBeginLoc(), | ||||||
9010 | diag::err_deduction_guide_no_trailing_return_type); | ||||||
9011 | break; | ||||||
9012 | } | ||||||
9013 | |||||||
9014 | // Check that the return type is written as a specialization of | ||||||
9015 | // the template specified as the deduction-guide's name. | ||||||
9016 | ParsedType TrailingReturnType = Chunk.Fun.getTrailingReturnType(); | ||||||
9017 | TypeSourceInfo *TSI = nullptr; | ||||||
9018 | QualType RetTy = GetTypeFromParser(TrailingReturnType, &TSI); | ||||||
9019 | assert(TSI && "deduction guide has valid type but invalid return type?")((TSI && "deduction guide has valid type but invalid return type?" ) ? static_cast<void> (0) : __assert_fail ("TSI && \"deduction guide has valid type but invalid return type?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9019, __PRETTY_FUNCTION__)); | ||||||
9020 | bool AcceptableReturnType = false; | ||||||
9021 | bool MightInstantiateToSpecialization = false; | ||||||
9022 | if (auto RetTST = | ||||||
9023 | TSI->getTypeLoc().getAs<TemplateSpecializationTypeLoc>()) { | ||||||
9024 | TemplateName SpecifiedName = RetTST.getTypePtr()->getTemplateName(); | ||||||
9025 | bool TemplateMatches = | ||||||
9026 | Context.hasSameTemplateName(SpecifiedName, GuidedTemplate); | ||||||
9027 | if (SpecifiedName.getKind() == TemplateName::Template && TemplateMatches) | ||||||
9028 | AcceptableReturnType = true; | ||||||
9029 | else { | ||||||
9030 | // This could still instantiate to the right type, unless we know it | ||||||
9031 | // names the wrong class template. | ||||||
9032 | auto *TD = SpecifiedName.getAsTemplateDecl(); | ||||||
9033 | MightInstantiateToSpecialization = !(TD && isa<ClassTemplateDecl>(TD) && | ||||||
9034 | !TemplateMatches); | ||||||
9035 | } | ||||||
9036 | } else if (!RetTy.hasQualifiers() && RetTy->isDependentType()) { | ||||||
9037 | MightInstantiateToSpecialization = true; | ||||||
9038 | } | ||||||
9039 | |||||||
9040 | if (!AcceptableReturnType) { | ||||||
9041 | Diag(TSI->getTypeLoc().getBeginLoc(), | ||||||
9042 | diag::err_deduction_guide_bad_trailing_return_type) | ||||||
9043 | << GuidedTemplate << TSI->getType() | ||||||
9044 | << MightInstantiateToSpecialization | ||||||
9045 | << TSI->getTypeLoc().getSourceRange(); | ||||||
9046 | } | ||||||
9047 | |||||||
9048 | // Keep going to check that we don't have any inner declarator pieces (we | ||||||
9049 | // could still have a function returning a pointer to a function). | ||||||
9050 | FoundFunction = true; | ||||||
9051 | } | ||||||
9052 | |||||||
9053 | if (D.isFunctionDefinition()) | ||||||
9054 | Diag(D.getIdentifierLoc(), diag::err_deduction_guide_defines_function); | ||||||
9055 | } | ||||||
9056 | |||||||
9057 | //===----------------------------------------------------------------------===// | ||||||
9058 | // Namespace Handling | ||||||
9059 | //===----------------------------------------------------------------------===// | ||||||
9060 | |||||||
9061 | /// Diagnose a mismatch in 'inline' qualifiers when a namespace is | ||||||
9062 | /// reopened. | ||||||
9063 | static void DiagnoseNamespaceInlineMismatch(Sema &S, SourceLocation KeywordLoc, | ||||||
9064 | SourceLocation Loc, | ||||||
9065 | IdentifierInfo *II, bool *IsInline, | ||||||
9066 | NamespaceDecl *PrevNS) { | ||||||
9067 | assert(*IsInline != PrevNS->isInline())((*IsInline != PrevNS->isInline()) ? static_cast<void> (0) : __assert_fail ("*IsInline != PrevNS->isInline()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9067, __PRETTY_FUNCTION__)); | ||||||
9068 | |||||||
9069 | // HACK: Work around a bug in libstdc++4.6's <atomic>, where | ||||||
9070 | // std::__atomic[0,1,2] are defined as non-inline namespaces, then reopened as | ||||||
9071 | // inline namespaces, with the intention of bringing names into namespace std. | ||||||
9072 | // | ||||||
9073 | // We support this just well enough to get that case working; this is not | ||||||
9074 | // sufficient to support reopening namespaces as inline in general. | ||||||
9075 | if (*IsInline && II && II->getName().startswith("__atomic") && | ||||||
9076 | S.getSourceManager().isInSystemHeader(Loc)) { | ||||||
9077 | // Mark all prior declarations of the namespace as inline. | ||||||
9078 | for (NamespaceDecl *NS = PrevNS->getMostRecentDecl(); NS; | ||||||
9079 | NS = NS->getPreviousDecl()) | ||||||
9080 | NS->setInline(*IsInline); | ||||||
9081 | // Patch up the lookup table for the containing namespace. This isn't really | ||||||
9082 | // correct, but it's good enough for this particular case. | ||||||
9083 | for (auto *I : PrevNS->decls()) | ||||||
9084 | if (auto *ND = dyn_cast<NamedDecl>(I)) | ||||||
9085 | PrevNS->getParent()->makeDeclVisibleInContext(ND); | ||||||
9086 | return; | ||||||
9087 | } | ||||||
9088 | |||||||
9089 | if (PrevNS->isInline()) | ||||||
9090 | // The user probably just forgot the 'inline', so suggest that it | ||||||
9091 | // be added back. | ||||||
9092 | S.Diag(Loc, diag::warn_inline_namespace_reopened_noninline) | ||||||
9093 | << FixItHint::CreateInsertion(KeywordLoc, "inline "); | ||||||
9094 | else | ||||||
9095 | S.Diag(Loc, diag::err_inline_namespace_mismatch); | ||||||
9096 | |||||||
9097 | S.Diag(PrevNS->getLocation(), diag::note_previous_definition); | ||||||
9098 | *IsInline = PrevNS->isInline(); | ||||||
9099 | } | ||||||
9100 | |||||||
9101 | /// ActOnStartNamespaceDef - This is called at the start of a namespace | ||||||
9102 | /// definition. | ||||||
9103 | Decl *Sema::ActOnStartNamespaceDef( | ||||||
9104 | Scope *NamespcScope, SourceLocation InlineLoc, SourceLocation NamespaceLoc, | ||||||
9105 | SourceLocation IdentLoc, IdentifierInfo *II, SourceLocation LBrace, | ||||||
9106 | const ParsedAttributesView &AttrList, UsingDirectiveDecl *&UD) { | ||||||
9107 | SourceLocation StartLoc = InlineLoc.isValid() ? InlineLoc : NamespaceLoc; | ||||||
9108 | // For anonymous namespace, take the location of the left brace. | ||||||
9109 | SourceLocation Loc = II ? IdentLoc : LBrace; | ||||||
9110 | bool IsInline = InlineLoc.isValid(); | ||||||
9111 | bool IsInvalid = false; | ||||||
9112 | bool IsStd = false; | ||||||
9113 | bool AddToKnown = false; | ||||||
9114 | Scope *DeclRegionScope = NamespcScope->getParent(); | ||||||
9115 | |||||||
9116 | NamespaceDecl *PrevNS = nullptr; | ||||||
9117 | if (II) { | ||||||
9118 | // C++ [namespace.def]p2: | ||||||
9119 | // The identifier in an original-namespace-definition shall not | ||||||
9120 | // have been previously defined in the declarative region in | ||||||
9121 | // which the original-namespace-definition appears. The | ||||||
9122 | // identifier in an original-namespace-definition is the name of | ||||||
9123 | // the namespace. Subsequently in that declarative region, it is | ||||||
9124 | // treated as an original-namespace-name. | ||||||
9125 | // | ||||||
9126 | // Since namespace names are unique in their scope, and we don't | ||||||
9127 | // look through using directives, just look for any ordinary names | ||||||
9128 | // as if by qualified name lookup. | ||||||
9129 | LookupResult R(*this, II, IdentLoc, LookupOrdinaryName, | ||||||
9130 | ForExternalRedeclaration); | ||||||
9131 | LookupQualifiedName(R, CurContext->getRedeclContext()); | ||||||
9132 | NamedDecl *PrevDecl = | ||||||
9133 | R.isSingleResult() ? R.getRepresentativeDecl() : nullptr; | ||||||
9134 | PrevNS = dyn_cast_or_null<NamespaceDecl>(PrevDecl); | ||||||
9135 | |||||||
9136 | if (PrevNS) { | ||||||
9137 | // This is an extended namespace definition. | ||||||
9138 | if (IsInline != PrevNS->isInline()) | ||||||
9139 | DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, Loc, II, | ||||||
9140 | &IsInline, PrevNS); | ||||||
9141 | } else if (PrevDecl) { | ||||||
9142 | // This is an invalid name redefinition. | ||||||
9143 | Diag(Loc, diag::err_redefinition_different_kind) | ||||||
9144 | << II; | ||||||
9145 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||||
9146 | IsInvalid = true; | ||||||
9147 | // Continue on to push Namespc as current DeclContext and return it. | ||||||
9148 | } else if (II->isStr("std") && | ||||||
9149 | CurContext->getRedeclContext()->isTranslationUnit()) { | ||||||
9150 | // This is the first "real" definition of the namespace "std", so update | ||||||
9151 | // our cache of the "std" namespace to point at this definition. | ||||||
9152 | PrevNS = getStdNamespace(); | ||||||
9153 | IsStd = true; | ||||||
9154 | AddToKnown = !IsInline; | ||||||
9155 | } else { | ||||||
9156 | // We've seen this namespace for the first time. | ||||||
9157 | AddToKnown = !IsInline; | ||||||
9158 | } | ||||||
9159 | } else { | ||||||
9160 | // Anonymous namespaces. | ||||||
9161 | |||||||
9162 | // Determine whether the parent already has an anonymous namespace. | ||||||
9163 | DeclContext *Parent = CurContext->getRedeclContext(); | ||||||
9164 | if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(Parent)) { | ||||||
9165 | PrevNS = TU->getAnonymousNamespace(); | ||||||
9166 | } else { | ||||||
9167 | NamespaceDecl *ND = cast<NamespaceDecl>(Parent); | ||||||
9168 | PrevNS = ND->getAnonymousNamespace(); | ||||||
9169 | } | ||||||
9170 | |||||||
9171 | if (PrevNS && IsInline != PrevNS->isInline()) | ||||||
9172 | DiagnoseNamespaceInlineMismatch(*this, NamespaceLoc, NamespaceLoc, II, | ||||||
9173 | &IsInline, PrevNS); | ||||||
9174 | } | ||||||
9175 | |||||||
9176 | NamespaceDecl *Namespc = NamespaceDecl::Create(Context, CurContext, IsInline, | ||||||
9177 | StartLoc, Loc, II, PrevNS); | ||||||
9178 | if (IsInvalid) | ||||||
9179 | Namespc->setInvalidDecl(); | ||||||
9180 | |||||||
9181 | ProcessDeclAttributeList(DeclRegionScope, Namespc, AttrList); | ||||||
9182 | AddPragmaAttributes(DeclRegionScope, Namespc); | ||||||
9183 | |||||||
9184 | // FIXME: Should we be merging attributes? | ||||||
9185 | if (const VisibilityAttr *Attr = Namespc->getAttr<VisibilityAttr>()) | ||||||
9186 | PushNamespaceVisibilityAttr(Attr, Loc); | ||||||
9187 | |||||||
9188 | if (IsStd) | ||||||
9189 | StdNamespace = Namespc; | ||||||
9190 | if (AddToKnown) | ||||||
9191 | KnownNamespaces[Namespc] = false; | ||||||
9192 | |||||||
9193 | if (II) { | ||||||
9194 | PushOnScopeChains(Namespc, DeclRegionScope); | ||||||
9195 | } else { | ||||||
9196 | // Link the anonymous namespace into its parent. | ||||||
9197 | DeclContext *Parent = CurContext->getRedeclContext(); | ||||||
9198 | if (TranslationUnitDecl *TU = dyn_cast<TranslationUnitDecl>(Parent)) { | ||||||
9199 | TU->setAnonymousNamespace(Namespc); | ||||||
9200 | } else { | ||||||
9201 | cast<NamespaceDecl>(Parent)->setAnonymousNamespace(Namespc); | ||||||
9202 | } | ||||||
9203 | |||||||
9204 | CurContext->addDecl(Namespc); | ||||||
9205 | |||||||
9206 | // C++ [namespace.unnamed]p1. An unnamed-namespace-definition | ||||||
9207 | // behaves as if it were replaced by | ||||||
9208 | // namespace unique { /* empty body */ } | ||||||
9209 | // using namespace unique; | ||||||
9210 | // namespace unique { namespace-body } | ||||||
9211 | // where all occurrences of 'unique' in a translation unit are | ||||||
9212 | // replaced by the same identifier and this identifier differs | ||||||
9213 | // from all other identifiers in the entire program. | ||||||
9214 | |||||||
9215 | // We just create the namespace with an empty name and then add an | ||||||
9216 | // implicit using declaration, just like the standard suggests. | ||||||
9217 | // | ||||||
9218 | // CodeGen enforces the "universally unique" aspect by giving all | ||||||
9219 | // declarations semantically contained within an anonymous | ||||||
9220 | // namespace internal linkage. | ||||||
9221 | |||||||
9222 | if (!PrevNS) { | ||||||
9223 | UD = UsingDirectiveDecl::Create(Context, Parent, | ||||||
9224 | /* 'using' */ LBrace, | ||||||
9225 | /* 'namespace' */ SourceLocation(), | ||||||
9226 | /* qualifier */ NestedNameSpecifierLoc(), | ||||||
9227 | /* identifier */ SourceLocation(), | ||||||
9228 | Namespc, | ||||||
9229 | /* Ancestor */ Parent); | ||||||
9230 | UD->setImplicit(); | ||||||
9231 | Parent->addDecl(UD); | ||||||
9232 | } | ||||||
9233 | } | ||||||
9234 | |||||||
9235 | ActOnDocumentableDecl(Namespc); | ||||||
9236 | |||||||
9237 | // Although we could have an invalid decl (i.e. the namespace name is a | ||||||
9238 | // redefinition), push it as current DeclContext and try to continue parsing. | ||||||
9239 | // FIXME: We should be able to push Namespc here, so that the each DeclContext | ||||||
9240 | // for the namespace has the declarations that showed up in that particular | ||||||
9241 | // namespace definition. | ||||||
9242 | PushDeclContext(NamespcScope, Namespc); | ||||||
9243 | return Namespc; | ||||||
9244 | } | ||||||
9245 | |||||||
9246 | /// getNamespaceDecl - Returns the namespace a decl represents. If the decl | ||||||
9247 | /// is a namespace alias, returns the namespace it points to. | ||||||
9248 | static inline NamespaceDecl *getNamespaceDecl(NamedDecl *D) { | ||||||
9249 | if (NamespaceAliasDecl *AD = dyn_cast_or_null<NamespaceAliasDecl>(D)) | ||||||
9250 | return AD->getNamespace(); | ||||||
9251 | return dyn_cast_or_null<NamespaceDecl>(D); | ||||||
9252 | } | ||||||
9253 | |||||||
9254 | /// ActOnFinishNamespaceDef - This callback is called after a namespace is | ||||||
9255 | /// exited. Decl is the DeclTy returned by ActOnStartNamespaceDef. | ||||||
9256 | void Sema::ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace) { | ||||||
9257 | NamespaceDecl *Namespc = dyn_cast_or_null<NamespaceDecl>(Dcl); | ||||||
9258 | assert(Namespc && "Invalid parameter, expected NamespaceDecl")((Namespc && "Invalid parameter, expected NamespaceDecl" ) ? static_cast<void> (0) : __assert_fail ("Namespc && \"Invalid parameter, expected NamespaceDecl\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9258, __PRETTY_FUNCTION__)); | ||||||
9259 | Namespc->setRBraceLoc(RBrace); | ||||||
9260 | PopDeclContext(); | ||||||
9261 | if (Namespc->hasAttr<VisibilityAttr>()) | ||||||
9262 | PopPragmaVisibility(true, RBrace); | ||||||
9263 | // If this namespace contains an export-declaration, export it now. | ||||||
9264 | if (DeferredExportedNamespaces.erase(Namespc)) | ||||||
9265 | Dcl->setModuleOwnershipKind(Decl::ModuleOwnershipKind::VisibleWhenImported); | ||||||
9266 | } | ||||||
9267 | |||||||
9268 | CXXRecordDecl *Sema::getStdBadAlloc() const { | ||||||
9269 | return cast_or_null<CXXRecordDecl>( | ||||||
9270 | StdBadAlloc.get(Context.getExternalSource())); | ||||||
9271 | } | ||||||
9272 | |||||||
9273 | EnumDecl *Sema::getStdAlignValT() const { | ||||||
9274 | return cast_or_null<EnumDecl>(StdAlignValT.get(Context.getExternalSource())); | ||||||
9275 | } | ||||||
9276 | |||||||
9277 | NamespaceDecl *Sema::getStdNamespace() const { | ||||||
9278 | return cast_or_null<NamespaceDecl>( | ||||||
9279 | StdNamespace.get(Context.getExternalSource())); | ||||||
9280 | } | ||||||
9281 | |||||||
9282 | NamespaceDecl *Sema::lookupStdExperimentalNamespace() { | ||||||
9283 | if (!StdExperimentalNamespaceCache) { | ||||||
9284 | if (auto Std = getStdNamespace()) { | ||||||
9285 | LookupResult Result(*this, &PP.getIdentifierTable().get("experimental"), | ||||||
9286 | SourceLocation(), LookupNamespaceName); | ||||||
9287 | if (!LookupQualifiedName(Result, Std) || | ||||||
9288 | !(StdExperimentalNamespaceCache = | ||||||
9289 | Result.getAsSingle<NamespaceDecl>())) | ||||||
9290 | Result.suppressDiagnostics(); | ||||||
9291 | } | ||||||
9292 | } | ||||||
9293 | return StdExperimentalNamespaceCache; | ||||||
9294 | } | ||||||
9295 | |||||||
9296 | namespace { | ||||||
9297 | |||||||
9298 | enum UnsupportedSTLSelect { | ||||||
9299 | USS_InvalidMember, | ||||||
9300 | USS_MissingMember, | ||||||
9301 | USS_NonTrivial, | ||||||
9302 | USS_Other | ||||||
9303 | }; | ||||||
9304 | |||||||
9305 | struct InvalidSTLDiagnoser { | ||||||
9306 | Sema &S; | ||||||
9307 | SourceLocation Loc; | ||||||
9308 | QualType TyForDiags; | ||||||
9309 | |||||||
9310 | QualType operator()(UnsupportedSTLSelect Sel = USS_Other, StringRef Name = "", | ||||||
9311 | const VarDecl *VD = nullptr) { | ||||||
9312 | { | ||||||
9313 | auto D = S.Diag(Loc, diag::err_std_compare_type_not_supported) | ||||||
9314 | << TyForDiags << ((int)Sel); | ||||||
9315 | if (Sel == USS_InvalidMember || Sel == USS_MissingMember) { | ||||||
9316 | assert(!Name.empty())((!Name.empty()) ? static_cast<void> (0) : __assert_fail ("!Name.empty()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9316, __PRETTY_FUNCTION__)); | ||||||
9317 | D << Name; | ||||||
9318 | } | ||||||
9319 | } | ||||||
9320 | if (Sel == USS_InvalidMember) { | ||||||
9321 | S.Diag(VD->getLocation(), diag::note_var_declared_here) | ||||||
9322 | << VD << VD->getSourceRange(); | ||||||
9323 | } | ||||||
9324 | return QualType(); | ||||||
9325 | } | ||||||
9326 | }; | ||||||
9327 | } // namespace | ||||||
9328 | |||||||
9329 | QualType Sema::CheckComparisonCategoryType(ComparisonCategoryType Kind, | ||||||
9330 | SourceLocation Loc) { | ||||||
9331 | assert(getLangOpts().CPlusPlus &&((getLangOpts().CPlusPlus && "Looking for comparison category type outside of C++." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Looking for comparison category type outside of C++.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9332, __PRETTY_FUNCTION__)) | ||||||
9332 | "Looking for comparison category type outside of C++.")((getLangOpts().CPlusPlus && "Looking for comparison category type outside of C++." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Looking for comparison category type outside of C++.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9332, __PRETTY_FUNCTION__)); | ||||||
9333 | |||||||
9334 | // Check if we've already successfully checked the comparison category type | ||||||
9335 | // before. If so, skip checking it again. | ||||||
9336 | ComparisonCategoryInfo *Info = Context.CompCategories.lookupInfo(Kind); | ||||||
9337 | if (Info && FullyCheckedComparisonCategories[static_cast<unsigned>(Kind)]) | ||||||
9338 | return Info->getType(); | ||||||
9339 | |||||||
9340 | // If lookup failed | ||||||
9341 | if (!Info) { | ||||||
9342 | std::string NameForDiags = "std::"; | ||||||
9343 | NameForDiags += ComparisonCategories::getCategoryString(Kind); | ||||||
9344 | Diag(Loc, diag::err_implied_comparison_category_type_not_found) | ||||||
9345 | << NameForDiags; | ||||||
9346 | return QualType(); | ||||||
9347 | } | ||||||
9348 | |||||||
9349 | assert(Info->Kind == Kind)((Info->Kind == Kind) ? static_cast<void> (0) : __assert_fail ("Info->Kind == Kind", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9349, __PRETTY_FUNCTION__)); | ||||||
9350 | assert(Info->Record)((Info->Record) ? static_cast<void> (0) : __assert_fail ("Info->Record", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9350, __PRETTY_FUNCTION__)); | ||||||
9351 | |||||||
9352 | // Update the Record decl in case we encountered a forward declaration on our | ||||||
9353 | // first pass. FIXME: This is a bit of a hack. | ||||||
9354 | if (Info->Record->hasDefinition()) | ||||||
9355 | Info->Record = Info->Record->getDefinition(); | ||||||
9356 | |||||||
9357 | // Use an elaborated type for diagnostics which has a name containing the | ||||||
9358 | // prepended 'std' namespace but not any inline namespace names. | ||||||
9359 | QualType TyForDiags = [&]() { | ||||||
9360 | auto *NNS = | ||||||
9361 | NestedNameSpecifier::Create(Context, nullptr, getStdNamespace()); | ||||||
9362 | return Context.getElaboratedType(ETK_None, NNS, Info->getType()); | ||||||
9363 | }(); | ||||||
9364 | |||||||
9365 | if (RequireCompleteType(Loc, TyForDiags, diag::err_incomplete_type)) | ||||||
9366 | return QualType(); | ||||||
9367 | |||||||
9368 | InvalidSTLDiagnoser UnsupportedSTLError{*this, Loc, TyForDiags}; | ||||||
9369 | |||||||
9370 | if (!Info->Record->isTriviallyCopyable()) | ||||||
9371 | return UnsupportedSTLError(USS_NonTrivial); | ||||||
9372 | |||||||
9373 | for (const CXXBaseSpecifier &BaseSpec : Info->Record->bases()) { | ||||||
9374 | CXXRecordDecl *Base = BaseSpec.getType()->getAsCXXRecordDecl(); | ||||||
9375 | // Tolerate empty base classes. | ||||||
9376 | if (Base->isEmpty()) | ||||||
9377 | continue; | ||||||
9378 | // Reject STL implementations which have at least one non-empty base. | ||||||
9379 | return UnsupportedSTLError(); | ||||||
9380 | } | ||||||
9381 | |||||||
9382 | // Check that the STL has implemented the types using a single integer field. | ||||||
9383 | // This expectation allows better codegen for builtin operators. We require: | ||||||
9384 | // (1) The class has exactly one field. | ||||||
9385 | // (2) The field is an integral or enumeration type. | ||||||
9386 | auto FIt = Info->Record->field_begin(), FEnd = Info->Record->field_end(); | ||||||
9387 | if (std::distance(FIt, FEnd) != 1 || | ||||||
9388 | !FIt->getType()->isIntegralOrEnumerationType()) { | ||||||
9389 | return UnsupportedSTLError(); | ||||||
9390 | } | ||||||
9391 | |||||||
9392 | // Build each of the require values and store them in Info. | ||||||
9393 | for (ComparisonCategoryResult CCR : | ||||||
9394 | ComparisonCategories::getPossibleResultsForType(Kind)) { | ||||||
9395 | StringRef MemName = ComparisonCategories::getResultString(CCR); | ||||||
9396 | ComparisonCategoryInfo::ValueInfo *ValInfo = Info->lookupValueInfo(CCR); | ||||||
9397 | |||||||
9398 | if (!ValInfo) | ||||||
9399 | return UnsupportedSTLError(USS_MissingMember, MemName); | ||||||
9400 | |||||||
9401 | VarDecl *VD = ValInfo->VD; | ||||||
9402 | assert(VD && "should not be null!")((VD && "should not be null!") ? static_cast<void> (0) : __assert_fail ("VD && \"should not be null!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9402, __PRETTY_FUNCTION__)); | ||||||
9403 | |||||||
9404 | // Attempt to diagnose reasons why the STL definition of this type | ||||||
9405 | // might be foobar, including it failing to be a constant expression. | ||||||
9406 | // TODO Handle more ways the lookup or result can be invalid. | ||||||
9407 | if (!VD->isStaticDataMember() || !VD->isConstexpr() || !VD->hasInit() || | ||||||
9408 | !VD->checkInitIsICE()) | ||||||
9409 | return UnsupportedSTLError(USS_InvalidMember, MemName, VD); | ||||||
9410 | |||||||
9411 | // Attempt to evaluate the var decl as a constant expression and extract | ||||||
9412 | // the value of its first field as a ICE. If this fails, the STL | ||||||
9413 | // implementation is not supported. | ||||||
9414 | if (!ValInfo->hasValidIntValue()) | ||||||
9415 | return UnsupportedSTLError(); | ||||||
9416 | |||||||
9417 | MarkVariableReferenced(Loc, VD); | ||||||
9418 | } | ||||||
9419 | |||||||
9420 | // We've successfully built the required types and expressions. Update | ||||||
9421 | // the cache and return the newly cached value. | ||||||
9422 | FullyCheckedComparisonCategories[static_cast<unsigned>(Kind)] = true; | ||||||
9423 | return Info->getType(); | ||||||
9424 | } | ||||||
9425 | |||||||
9426 | /// Retrieve the special "std" namespace, which may require us to | ||||||
9427 | /// implicitly define the namespace. | ||||||
9428 | NamespaceDecl *Sema::getOrCreateStdNamespace() { | ||||||
9429 | if (!StdNamespace) { | ||||||
9430 | // The "std" namespace has not yet been defined, so build one implicitly. | ||||||
9431 | StdNamespace = NamespaceDecl::Create(Context, | ||||||
9432 | Context.getTranslationUnitDecl(), | ||||||
9433 | /*Inline=*/false, | ||||||
9434 | SourceLocation(), SourceLocation(), | ||||||
9435 | &PP.getIdentifierTable().get("std"), | ||||||
9436 | /*PrevDecl=*/nullptr); | ||||||
9437 | getStdNamespace()->setImplicit(true); | ||||||
9438 | } | ||||||
9439 | |||||||
9440 | return getStdNamespace(); | ||||||
9441 | } | ||||||
9442 | |||||||
9443 | bool Sema::isStdInitializerList(QualType Ty, QualType *Element) { | ||||||
9444 | assert(getLangOpts().CPlusPlus &&((getLangOpts().CPlusPlus && "Looking for std::initializer_list outside of C++." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Looking for std::initializer_list outside of C++.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9445, __PRETTY_FUNCTION__)) | ||||||
9445 | "Looking for std::initializer_list outside of C++.")((getLangOpts().CPlusPlus && "Looking for std::initializer_list outside of C++." ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus && \"Looking for std::initializer_list outside of C++.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9445, __PRETTY_FUNCTION__)); | ||||||
9446 | |||||||
9447 | // We're looking for implicit instantiations of | ||||||
9448 | // template <typename E> class std::initializer_list. | ||||||
9449 | |||||||
9450 | if (!StdNamespace) // If we haven't seen namespace std yet, this can't be it. | ||||||
9451 | return false; | ||||||
9452 | |||||||
9453 | ClassTemplateDecl *Template = nullptr; | ||||||
9454 | const TemplateArgument *Arguments = nullptr; | ||||||
9455 | |||||||
9456 | if (const RecordType *RT = Ty->getAs<RecordType>()) { | ||||||
9457 | |||||||
9458 | ClassTemplateSpecializationDecl *Specialization = | ||||||
9459 | dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl()); | ||||||
9460 | if (!Specialization) | ||||||
9461 | return false; | ||||||
9462 | |||||||
9463 | Template = Specialization->getSpecializedTemplate(); | ||||||
9464 | Arguments = Specialization->getTemplateArgs().data(); | ||||||
9465 | } else if (const TemplateSpecializationType *TST = | ||||||
9466 | Ty->getAs<TemplateSpecializationType>()) { | ||||||
9467 | Template = dyn_cast_or_null<ClassTemplateDecl>( | ||||||
9468 | TST->getTemplateName().getAsTemplateDecl()); | ||||||
9469 | Arguments = TST->getArgs(); | ||||||
9470 | } | ||||||
9471 | if (!Template) | ||||||
9472 | return false; | ||||||
9473 | |||||||
9474 | if (!StdInitializerList) { | ||||||
9475 | // Haven't recognized std::initializer_list yet, maybe this is it. | ||||||
9476 | CXXRecordDecl *TemplateClass = Template->getTemplatedDecl(); | ||||||
9477 | if (TemplateClass->getIdentifier() != | ||||||
9478 | &PP.getIdentifierTable().get("initializer_list") || | ||||||
9479 | !getStdNamespace()->InEnclosingNamespaceSetOf( | ||||||
9480 | TemplateClass->getDeclContext())) | ||||||
9481 | return false; | ||||||
9482 | // This is a template called std::initializer_list, but is it the right | ||||||
9483 | // template? | ||||||
9484 | TemplateParameterList *Params = Template->getTemplateParameters(); | ||||||
9485 | if (Params->getMinRequiredArguments() != 1) | ||||||
9486 | return false; | ||||||
9487 | if (!isa<TemplateTypeParmDecl>(Params->getParam(0))) | ||||||
9488 | return false; | ||||||
9489 | |||||||
9490 | // It's the right template. | ||||||
9491 | StdInitializerList = Template; | ||||||
9492 | } | ||||||
9493 | |||||||
9494 | if (Template->getCanonicalDecl() != StdInitializerList->getCanonicalDecl()) | ||||||
9495 | return false; | ||||||
9496 | |||||||
9497 | // This is an instance of std::initializer_list. Find the argument type. | ||||||
9498 | if (Element) | ||||||
9499 | *Element = Arguments[0].getAsType(); | ||||||
9500 | return true; | ||||||
9501 | } | ||||||
9502 | |||||||
9503 | static ClassTemplateDecl *LookupStdInitializerList(Sema &S, SourceLocation Loc){ | ||||||
9504 | NamespaceDecl *Std = S.getStdNamespace(); | ||||||
9505 | if (!Std) { | ||||||
9506 | S.Diag(Loc, diag::err_implied_std_initializer_list_not_found); | ||||||
9507 | return nullptr; | ||||||
9508 | } | ||||||
9509 | |||||||
9510 | LookupResult Result(S, &S.PP.getIdentifierTable().get("initializer_list"), | ||||||
9511 | Loc, Sema::LookupOrdinaryName); | ||||||
9512 | if (!S.LookupQualifiedName(Result, Std)) { | ||||||
9513 | S.Diag(Loc, diag::err_implied_std_initializer_list_not_found); | ||||||
9514 | return nullptr; | ||||||
9515 | } | ||||||
9516 | ClassTemplateDecl *Template = Result.getAsSingle<ClassTemplateDecl>(); | ||||||
9517 | if (!Template) { | ||||||
9518 | Result.suppressDiagnostics(); | ||||||
9519 | // We found something weird. Complain about the first thing we found. | ||||||
9520 | NamedDecl *Found = *Result.begin(); | ||||||
9521 | S.Diag(Found->getLocation(), diag::err_malformed_std_initializer_list); | ||||||
9522 | return nullptr; | ||||||
9523 | } | ||||||
9524 | |||||||
9525 | // We found some template called std::initializer_list. Now verify that it's | ||||||
9526 | // correct. | ||||||
9527 | TemplateParameterList *Params = Template->getTemplateParameters(); | ||||||
9528 | if (Params->getMinRequiredArguments() != 1 || | ||||||
9529 | !isa<TemplateTypeParmDecl>(Params->getParam(0))) { | ||||||
9530 | S.Diag(Template->getLocation(), diag::err_malformed_std_initializer_list); | ||||||
9531 | return nullptr; | ||||||
9532 | } | ||||||
9533 | |||||||
9534 | return Template; | ||||||
9535 | } | ||||||
9536 | |||||||
9537 | QualType Sema::BuildStdInitializerList(QualType Element, SourceLocation Loc) { | ||||||
9538 | if (!StdInitializerList) { | ||||||
9539 | StdInitializerList = LookupStdInitializerList(*this, Loc); | ||||||
9540 | if (!StdInitializerList) | ||||||
9541 | return QualType(); | ||||||
9542 | } | ||||||
9543 | |||||||
9544 | TemplateArgumentListInfo Args(Loc, Loc); | ||||||
9545 | Args.addArgument(TemplateArgumentLoc(TemplateArgument(Element), | ||||||
9546 | Context.getTrivialTypeSourceInfo(Element, | ||||||
9547 | Loc))); | ||||||
9548 | return Context.getCanonicalType( | ||||||
9549 | CheckTemplateIdType(TemplateName(StdInitializerList), Loc, Args)); | ||||||
9550 | } | ||||||
9551 | |||||||
9552 | bool Sema::isInitListConstructor(const FunctionDecl *Ctor) { | ||||||
9553 | // C++ [dcl.init.list]p2: | ||||||
9554 | // A constructor is an initializer-list constructor if its first parameter | ||||||
9555 | // is of type std::initializer_list<E> or reference to possibly cv-qualified | ||||||
9556 | // std::initializer_list<E> for some type E, and either there are no other | ||||||
9557 | // parameters or else all other parameters have default arguments. | ||||||
9558 | if (Ctor->getNumParams() < 1 || | ||||||
9559 | (Ctor->getNumParams() > 1 && !Ctor->getParamDecl(1)->hasDefaultArg())) | ||||||
9560 | return false; | ||||||
9561 | |||||||
9562 | QualType ArgType = Ctor->getParamDecl(0)->getType(); | ||||||
9563 | if (const ReferenceType *RT = ArgType->getAs<ReferenceType>()) | ||||||
9564 | ArgType = RT->getPointeeType().getUnqualifiedType(); | ||||||
9565 | |||||||
9566 | return isStdInitializerList(ArgType, nullptr); | ||||||
9567 | } | ||||||
9568 | |||||||
9569 | /// Determine whether a using statement is in a context where it will be | ||||||
9570 | /// apply in all contexts. | ||||||
9571 | static bool IsUsingDirectiveInToplevelContext(DeclContext *CurContext) { | ||||||
9572 | switch (CurContext->getDeclKind()) { | ||||||
9573 | case Decl::TranslationUnit: | ||||||
9574 | return true; | ||||||
9575 | case Decl::LinkageSpec: | ||||||
9576 | return IsUsingDirectiveInToplevelContext(CurContext->getParent()); | ||||||
9577 | default: | ||||||
9578 | return false; | ||||||
9579 | } | ||||||
9580 | } | ||||||
9581 | |||||||
9582 | namespace { | ||||||
9583 | |||||||
9584 | // Callback to only accept typo corrections that are namespaces. | ||||||
9585 | class NamespaceValidatorCCC final : public CorrectionCandidateCallback { | ||||||
9586 | public: | ||||||
9587 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
9588 | if (NamedDecl *ND = candidate.getCorrectionDecl()) | ||||||
9589 | return isa<NamespaceDecl>(ND) || isa<NamespaceAliasDecl>(ND); | ||||||
9590 | return false; | ||||||
9591 | } | ||||||
9592 | |||||||
9593 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
9594 | return std::make_unique<NamespaceValidatorCCC>(*this); | ||||||
9595 | } | ||||||
9596 | }; | ||||||
9597 | |||||||
9598 | } | ||||||
9599 | |||||||
9600 | static bool TryNamespaceTypoCorrection(Sema &S, LookupResult &R, Scope *Sc, | ||||||
9601 | CXXScopeSpec &SS, | ||||||
9602 | SourceLocation IdentLoc, | ||||||
9603 | IdentifierInfo *Ident) { | ||||||
9604 | R.clear(); | ||||||
9605 | NamespaceValidatorCCC CCC{}; | ||||||
9606 | if (TypoCorrection Corrected = | ||||||
9607 | S.CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), Sc, &SS, CCC, | ||||||
9608 | Sema::CTK_ErrorRecovery)) { | ||||||
9609 | if (DeclContext *DC = S.computeDeclContext(SS, false)) { | ||||||
9610 | std::string CorrectedStr(Corrected.getAsString(S.getLangOpts())); | ||||||
9611 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||||
9612 | Ident->getName().equals(CorrectedStr); | ||||||
9613 | S.diagnoseTypo(Corrected, | ||||||
9614 | S.PDiag(diag::err_using_directive_member_suggest) | ||||||
9615 | << Ident << DC << DroppedSpecifier << SS.getRange(), | ||||||
9616 | S.PDiag(diag::note_namespace_defined_here)); | ||||||
9617 | } else { | ||||||
9618 | S.diagnoseTypo(Corrected, | ||||||
9619 | S.PDiag(diag::err_using_directive_suggest) << Ident, | ||||||
9620 | S.PDiag(diag::note_namespace_defined_here)); | ||||||
9621 | } | ||||||
9622 | R.addDecl(Corrected.getFoundDecl()); | ||||||
9623 | return true; | ||||||
9624 | } | ||||||
9625 | return false; | ||||||
9626 | } | ||||||
9627 | |||||||
9628 | Decl *Sema::ActOnUsingDirective(Scope *S, SourceLocation UsingLoc, | ||||||
9629 | SourceLocation NamespcLoc, CXXScopeSpec &SS, | ||||||
9630 | SourceLocation IdentLoc, | ||||||
9631 | IdentifierInfo *NamespcName, | ||||||
9632 | const ParsedAttributesView &AttrList) { | ||||||
9633 | assert(!SS.isInvalid() && "Invalid CXXScopeSpec.")((!SS.isInvalid() && "Invalid CXXScopeSpec.") ? static_cast <void> (0) : __assert_fail ("!SS.isInvalid() && \"Invalid CXXScopeSpec.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9633, __PRETTY_FUNCTION__)); | ||||||
9634 | assert(NamespcName && "Invalid NamespcName.")((NamespcName && "Invalid NamespcName.") ? static_cast <void> (0) : __assert_fail ("NamespcName && \"Invalid NamespcName.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9634, __PRETTY_FUNCTION__)); | ||||||
9635 | assert(IdentLoc.isValid() && "Invalid NamespceName location.")((IdentLoc.isValid() && "Invalid NamespceName location." ) ? static_cast<void> (0) : __assert_fail ("IdentLoc.isValid() && \"Invalid NamespceName location.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9635, __PRETTY_FUNCTION__)); | ||||||
9636 | |||||||
9637 | // This can only happen along a recovery path. | ||||||
9638 | while (S->isTemplateParamScope()) | ||||||
9639 | S = S->getParent(); | ||||||
9640 | assert(S->getFlags() & Scope::DeclScope && "Invalid Scope.")((S->getFlags() & Scope::DeclScope && "Invalid Scope." ) ? static_cast<void> (0) : __assert_fail ("S->getFlags() & Scope::DeclScope && \"Invalid Scope.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9640, __PRETTY_FUNCTION__)); | ||||||
9641 | |||||||
9642 | UsingDirectiveDecl *UDir = nullptr; | ||||||
9643 | NestedNameSpecifier *Qualifier = nullptr; | ||||||
9644 | if (SS.isSet()) | ||||||
9645 | Qualifier = SS.getScopeRep(); | ||||||
9646 | |||||||
9647 | // Lookup namespace name. | ||||||
9648 | LookupResult R(*this, NamespcName, IdentLoc, LookupNamespaceName); | ||||||
9649 | LookupParsedName(R, S, &SS); | ||||||
9650 | if (R.isAmbiguous()) | ||||||
9651 | return nullptr; | ||||||
9652 | |||||||
9653 | if (R.empty()) { | ||||||
9654 | R.clear(); | ||||||
9655 | // Allow "using namespace std;" or "using namespace ::std;" even if | ||||||
9656 | // "std" hasn't been defined yet, for GCC compatibility. | ||||||
9657 | if ((!Qualifier || Qualifier->getKind() == NestedNameSpecifier::Global) && | ||||||
9658 | NamespcName->isStr("std")) { | ||||||
9659 | Diag(IdentLoc, diag::ext_using_undefined_std); | ||||||
9660 | R.addDecl(getOrCreateStdNamespace()); | ||||||
9661 | R.resolveKind(); | ||||||
9662 | } | ||||||
9663 | // Otherwise, attempt typo correction. | ||||||
9664 | else TryNamespaceTypoCorrection(*this, R, S, SS, IdentLoc, NamespcName); | ||||||
9665 | } | ||||||
9666 | |||||||
9667 | if (!R.empty()) { | ||||||
9668 | NamedDecl *Named = R.getRepresentativeDecl(); | ||||||
9669 | NamespaceDecl *NS = R.getAsSingle<NamespaceDecl>(); | ||||||
9670 | assert(NS && "expected namespace decl")((NS && "expected namespace decl") ? static_cast<void > (0) : __assert_fail ("NS && \"expected namespace decl\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9670, __PRETTY_FUNCTION__)); | ||||||
9671 | |||||||
9672 | // The use of a nested name specifier may trigger deprecation warnings. | ||||||
9673 | DiagnoseUseOfDecl(Named, IdentLoc); | ||||||
9674 | |||||||
9675 | // C++ [namespace.udir]p1: | ||||||
9676 | // A using-directive specifies that the names in the nominated | ||||||
9677 | // namespace can be used in the scope in which the | ||||||
9678 | // using-directive appears after the using-directive. During | ||||||
9679 | // unqualified name lookup (3.4.1), the names appear as if they | ||||||
9680 | // were declared in the nearest enclosing namespace which | ||||||
9681 | // contains both the using-directive and the nominated | ||||||
9682 | // namespace. [Note: in this context, "contains" means "contains | ||||||
9683 | // directly or indirectly". ] | ||||||
9684 | |||||||
9685 | // Find enclosing context containing both using-directive and | ||||||
9686 | // nominated namespace. | ||||||
9687 | DeclContext *CommonAncestor = NS; | ||||||
9688 | while (CommonAncestor && !CommonAncestor->Encloses(CurContext)) | ||||||
9689 | CommonAncestor = CommonAncestor->getParent(); | ||||||
9690 | |||||||
9691 | UDir = UsingDirectiveDecl::Create(Context, CurContext, UsingLoc, NamespcLoc, | ||||||
9692 | SS.getWithLocInContext(Context), | ||||||
9693 | IdentLoc, Named, CommonAncestor); | ||||||
9694 | |||||||
9695 | if (IsUsingDirectiveInToplevelContext(CurContext) && | ||||||
9696 | !SourceMgr.isInMainFile(SourceMgr.getExpansionLoc(IdentLoc))) { | ||||||
9697 | Diag(IdentLoc, diag::warn_using_directive_in_header); | ||||||
9698 | } | ||||||
9699 | |||||||
9700 | PushUsingDirective(S, UDir); | ||||||
9701 | } else { | ||||||
9702 | Diag(IdentLoc, diag::err_expected_namespace_name) << SS.getRange(); | ||||||
9703 | } | ||||||
9704 | |||||||
9705 | if (UDir) | ||||||
9706 | ProcessDeclAttributeList(S, UDir, AttrList); | ||||||
9707 | |||||||
9708 | return UDir; | ||||||
9709 | } | ||||||
9710 | |||||||
9711 | void Sema::PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir) { | ||||||
9712 | // If the scope has an associated entity and the using directive is at | ||||||
9713 | // namespace or translation unit scope, add the UsingDirectiveDecl into | ||||||
9714 | // its lookup structure so qualified name lookup can find it. | ||||||
9715 | DeclContext *Ctx = S->getEntity(); | ||||||
9716 | if (Ctx && !Ctx->isFunctionOrMethod()) | ||||||
9717 | Ctx->addDecl(UDir); | ||||||
9718 | else | ||||||
9719 | // Otherwise, it is at block scope. The using-directives will affect lookup | ||||||
9720 | // only to the end of the scope. | ||||||
9721 | S->PushUsingDirective(UDir); | ||||||
9722 | } | ||||||
9723 | |||||||
9724 | Decl *Sema::ActOnUsingDeclaration(Scope *S, AccessSpecifier AS, | ||||||
9725 | SourceLocation UsingLoc, | ||||||
9726 | SourceLocation TypenameLoc, CXXScopeSpec &SS, | ||||||
9727 | UnqualifiedId &Name, | ||||||
9728 | SourceLocation EllipsisLoc, | ||||||
9729 | const ParsedAttributesView &AttrList) { | ||||||
9730 | assert(S->getFlags() & Scope::DeclScope && "Invalid Scope.")((S->getFlags() & Scope::DeclScope && "Invalid Scope." ) ? static_cast<void> (0) : __assert_fail ("S->getFlags() & Scope::DeclScope && \"Invalid Scope.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9730, __PRETTY_FUNCTION__)); | ||||||
9731 | |||||||
9732 | if (SS.isEmpty()) { | ||||||
9733 | Diag(Name.getBeginLoc(), diag::err_using_requires_qualname); | ||||||
9734 | return nullptr; | ||||||
9735 | } | ||||||
9736 | |||||||
9737 | switch (Name.getKind()) { | ||||||
9738 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||
9739 | case UnqualifiedIdKind::IK_Identifier: | ||||||
9740 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||
9741 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||
9742 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||||
9743 | break; | ||||||
9744 | |||||||
9745 | case UnqualifiedIdKind::IK_ConstructorName: | ||||||
9746 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||||
9747 | // C++11 inheriting constructors. | ||||||
9748 | Diag(Name.getBeginLoc(), | ||||||
9749 | getLangOpts().CPlusPlus11 | ||||||
9750 | ? diag::warn_cxx98_compat_using_decl_constructor | ||||||
9751 | : diag::err_using_decl_constructor) | ||||||
9752 | << SS.getRange(); | ||||||
9753 | |||||||
9754 | if (getLangOpts().CPlusPlus11) break; | ||||||
9755 | |||||||
9756 | return nullptr; | ||||||
9757 | |||||||
9758 | case UnqualifiedIdKind::IK_DestructorName: | ||||||
9759 | Diag(Name.getBeginLoc(), diag::err_using_decl_destructor) << SS.getRange(); | ||||||
9760 | return nullptr; | ||||||
9761 | |||||||
9762 | case UnqualifiedIdKind::IK_TemplateId: | ||||||
9763 | Diag(Name.getBeginLoc(), diag::err_using_decl_template_id) | ||||||
9764 | << SourceRange(Name.TemplateId->LAngleLoc, Name.TemplateId->RAngleLoc); | ||||||
9765 | return nullptr; | ||||||
9766 | |||||||
9767 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||||
9768 | llvm_unreachable("cannot parse qualified deduction guide name")::llvm::llvm_unreachable_internal("cannot parse qualified deduction guide name" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9768); | ||||||
9769 | } | ||||||
9770 | |||||||
9771 | DeclarationNameInfo TargetNameInfo = GetNameFromUnqualifiedId(Name); | ||||||
9772 | DeclarationName TargetName = TargetNameInfo.getName(); | ||||||
9773 | if (!TargetName) | ||||||
9774 | return nullptr; | ||||||
9775 | |||||||
9776 | // Warn about access declarations. | ||||||
9777 | if (UsingLoc.isInvalid()) { | ||||||
9778 | Diag(Name.getBeginLoc(), getLangOpts().CPlusPlus11 | ||||||
9779 | ? diag::err_access_decl | ||||||
9780 | : diag::warn_access_decl_deprecated) | ||||||
9781 | << FixItHint::CreateInsertion(SS.getRange().getBegin(), "using "); | ||||||
9782 | } | ||||||
9783 | |||||||
9784 | if (EllipsisLoc.isInvalid()) { | ||||||
9785 | if (DiagnoseUnexpandedParameterPack(SS, UPPC_UsingDeclaration) || | ||||||
9786 | DiagnoseUnexpandedParameterPack(TargetNameInfo, UPPC_UsingDeclaration)) | ||||||
9787 | return nullptr; | ||||||
9788 | } else { | ||||||
9789 | if (!SS.getScopeRep()->containsUnexpandedParameterPack() && | ||||||
9790 | !TargetNameInfo.containsUnexpandedParameterPack()) { | ||||||
9791 | Diag(EllipsisLoc, diag::err_pack_expansion_without_parameter_packs) | ||||||
9792 | << SourceRange(SS.getBeginLoc(), TargetNameInfo.getEndLoc()); | ||||||
9793 | EllipsisLoc = SourceLocation(); | ||||||
9794 | } | ||||||
9795 | } | ||||||
9796 | |||||||
9797 | NamedDecl *UD = | ||||||
9798 | BuildUsingDeclaration(S, AS, UsingLoc, TypenameLoc.isValid(), TypenameLoc, | ||||||
9799 | SS, TargetNameInfo, EllipsisLoc, AttrList, | ||||||
9800 | /*IsInstantiation*/false); | ||||||
9801 | if (UD) | ||||||
9802 | PushOnScopeChains(UD, S, /*AddToContext*/ false); | ||||||
9803 | |||||||
9804 | return UD; | ||||||
9805 | } | ||||||
9806 | |||||||
9807 | /// Determine whether a using declaration considers the given | ||||||
9808 | /// declarations as "equivalent", e.g., if they are redeclarations of | ||||||
9809 | /// the same entity or are both typedefs of the same type. | ||||||
9810 | static bool | ||||||
9811 | IsEquivalentForUsingDecl(ASTContext &Context, NamedDecl *D1, NamedDecl *D2) { | ||||||
9812 | if (D1->getCanonicalDecl() == D2->getCanonicalDecl()) | ||||||
9813 | return true; | ||||||
9814 | |||||||
9815 | if (TypedefNameDecl *TD1 = dyn_cast<TypedefNameDecl>(D1)) | ||||||
9816 | if (TypedefNameDecl *TD2 = dyn_cast<TypedefNameDecl>(D2)) | ||||||
9817 | return Context.hasSameType(TD1->getUnderlyingType(), | ||||||
9818 | TD2->getUnderlyingType()); | ||||||
9819 | |||||||
9820 | return false; | ||||||
9821 | } | ||||||
9822 | |||||||
9823 | |||||||
9824 | /// Determines whether to create a using shadow decl for a particular | ||||||
9825 | /// decl, given the set of decls existing prior to this using lookup. | ||||||
9826 | bool Sema::CheckUsingShadowDecl(UsingDecl *Using, NamedDecl *Orig, | ||||||
9827 | const LookupResult &Previous, | ||||||
9828 | UsingShadowDecl *&PrevShadow) { | ||||||
9829 | // Diagnose finding a decl which is not from a base class of the | ||||||
9830 | // current class. We do this now because there are cases where this | ||||||
9831 | // function will silently decide not to build a shadow decl, which | ||||||
9832 | // will pre-empt further diagnostics. | ||||||
9833 | // | ||||||
9834 | // We don't need to do this in C++11 because we do the check once on | ||||||
9835 | // the qualifier. | ||||||
9836 | // | ||||||
9837 | // FIXME: diagnose the following if we care enough: | ||||||
9838 | // struct A { int foo; }; | ||||||
9839 | // struct B : A { using A::foo; }; | ||||||
9840 | // template <class T> struct C : A {}; | ||||||
9841 | // template <class T> struct D : C<T> { using B::foo; } // <--- | ||||||
9842 | // This is invalid (during instantiation) in C++03 because B::foo | ||||||
9843 | // resolves to the using decl in B, which is not a base class of D<T>. | ||||||
9844 | // We can't diagnose it immediately because C<T> is an unknown | ||||||
9845 | // specialization. The UsingShadowDecl in D<T> then points directly | ||||||
9846 | // to A::foo, which will look well-formed when we instantiate. | ||||||
9847 | // The right solution is to not collapse the shadow-decl chain. | ||||||
9848 | if (!getLangOpts().CPlusPlus11 && CurContext->isRecord()) { | ||||||
9849 | DeclContext *OrigDC = Orig->getDeclContext(); | ||||||
9850 | |||||||
9851 | // Handle enums and anonymous structs. | ||||||
9852 | if (isa<EnumDecl>(OrigDC)) OrigDC = OrigDC->getParent(); | ||||||
9853 | CXXRecordDecl *OrigRec = cast<CXXRecordDecl>(OrigDC); | ||||||
9854 | while (OrigRec->isAnonymousStructOrUnion()) | ||||||
9855 | OrigRec = cast<CXXRecordDecl>(OrigRec->getDeclContext()); | ||||||
9856 | |||||||
9857 | if (cast<CXXRecordDecl>(CurContext)->isProvablyNotDerivedFrom(OrigRec)) { | ||||||
9858 | if (OrigDC == CurContext) { | ||||||
9859 | Diag(Using->getLocation(), | ||||||
9860 | diag::err_using_decl_nested_name_specifier_is_current_class) | ||||||
9861 | << Using->getQualifierLoc().getSourceRange(); | ||||||
9862 | Diag(Orig->getLocation(), diag::note_using_decl_target); | ||||||
9863 | Using->setInvalidDecl(); | ||||||
9864 | return true; | ||||||
9865 | } | ||||||
9866 | |||||||
9867 | Diag(Using->getQualifierLoc().getBeginLoc(), | ||||||
9868 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||||
9869 | << Using->getQualifier() | ||||||
9870 | << cast<CXXRecordDecl>(CurContext) | ||||||
9871 | << Using->getQualifierLoc().getSourceRange(); | ||||||
9872 | Diag(Orig->getLocation(), diag::note_using_decl_target); | ||||||
9873 | Using->setInvalidDecl(); | ||||||
9874 | return true; | ||||||
9875 | } | ||||||
9876 | } | ||||||
9877 | |||||||
9878 | if (Previous.empty()) return false; | ||||||
9879 | |||||||
9880 | NamedDecl *Target = Orig; | ||||||
9881 | if (isa<UsingShadowDecl>(Target)) | ||||||
9882 | Target = cast<UsingShadowDecl>(Target)->getTargetDecl(); | ||||||
9883 | |||||||
9884 | // If the target happens to be one of the previous declarations, we | ||||||
9885 | // don't have a conflict. | ||||||
9886 | // | ||||||
9887 | // FIXME: but we might be increasing its access, in which case we | ||||||
9888 | // should redeclare it. | ||||||
9889 | NamedDecl *NonTag = nullptr, *Tag = nullptr; | ||||||
9890 | bool FoundEquivalentDecl = false; | ||||||
9891 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||||
9892 | I != E; ++I) { | ||||||
9893 | NamedDecl *D = (*I)->getUnderlyingDecl(); | ||||||
9894 | // We can have UsingDecls in our Previous results because we use the same | ||||||
9895 | // LookupResult for checking whether the UsingDecl itself is a valid | ||||||
9896 | // redeclaration. | ||||||
9897 | if (isa<UsingDecl>(D) || isa<UsingPackDecl>(D)) | ||||||
9898 | continue; | ||||||
9899 | |||||||
9900 | if (auto *RD = dyn_cast<CXXRecordDecl>(D)) { | ||||||
9901 | // C++ [class.mem]p19: | ||||||
9902 | // If T is the name of a class, then [every named member other than | ||||||
9903 | // a non-static data member] shall have a name different from T | ||||||
9904 | if (RD->isInjectedClassName() && !isa<FieldDecl>(Target) && | ||||||
9905 | !isa<IndirectFieldDecl>(Target) && | ||||||
9906 | !isa<UnresolvedUsingValueDecl>(Target) && | ||||||
9907 | DiagnoseClassNameShadow( | ||||||
9908 | CurContext, | ||||||
9909 | DeclarationNameInfo(Using->getDeclName(), Using->getLocation()))) | ||||||
9910 | return true; | ||||||
9911 | } | ||||||
9912 | |||||||
9913 | if (IsEquivalentForUsingDecl(Context, D, Target)) { | ||||||
9914 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(*I)) | ||||||
9915 | PrevShadow = Shadow; | ||||||
9916 | FoundEquivalentDecl = true; | ||||||
9917 | } else if (isEquivalentInternalLinkageDeclaration(D, Target)) { | ||||||
9918 | // We don't conflict with an existing using shadow decl of an equivalent | ||||||
9919 | // declaration, but we're not a redeclaration of it. | ||||||
9920 | FoundEquivalentDecl = true; | ||||||
9921 | } | ||||||
9922 | |||||||
9923 | if (isVisible(D)) | ||||||
9924 | (isa<TagDecl>(D) ? Tag : NonTag) = D; | ||||||
9925 | } | ||||||
9926 | |||||||
9927 | if (FoundEquivalentDecl) | ||||||
9928 | return false; | ||||||
9929 | |||||||
9930 | if (FunctionDecl *FD = Target->getAsFunction()) { | ||||||
9931 | NamedDecl *OldDecl = nullptr; | ||||||
9932 | switch (CheckOverload(nullptr, FD, Previous, OldDecl, | ||||||
9933 | /*IsForUsingDecl*/ true)) { | ||||||
9934 | case Ovl_Overload: | ||||||
9935 | return false; | ||||||
9936 | |||||||
9937 | case Ovl_NonFunction: | ||||||
9938 | Diag(Using->getLocation(), diag::err_using_decl_conflict); | ||||||
9939 | break; | ||||||
9940 | |||||||
9941 | // We found a decl with the exact signature. | ||||||
9942 | case Ovl_Match: | ||||||
9943 | // If we're in a record, we want to hide the target, so we | ||||||
9944 | // return true (without a diagnostic) to tell the caller not to | ||||||
9945 | // build a shadow decl. | ||||||
9946 | if (CurContext->isRecord()) | ||||||
9947 | return true; | ||||||
9948 | |||||||
9949 | // If we're not in a record, this is an error. | ||||||
9950 | Diag(Using->getLocation(), diag::err_using_decl_conflict); | ||||||
9951 | break; | ||||||
9952 | } | ||||||
9953 | |||||||
9954 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||||
9955 | Diag(OldDecl->getLocation(), diag::note_using_decl_conflict); | ||||||
9956 | Using->setInvalidDecl(); | ||||||
9957 | return true; | ||||||
9958 | } | ||||||
9959 | |||||||
9960 | // Target is not a function. | ||||||
9961 | |||||||
9962 | if (isa<TagDecl>(Target)) { | ||||||
9963 | // No conflict between a tag and a non-tag. | ||||||
9964 | if (!Tag) return false; | ||||||
9965 | |||||||
9966 | Diag(Using->getLocation(), diag::err_using_decl_conflict); | ||||||
9967 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||||
9968 | Diag(Tag->getLocation(), diag::note_using_decl_conflict); | ||||||
9969 | Using->setInvalidDecl(); | ||||||
9970 | return true; | ||||||
9971 | } | ||||||
9972 | |||||||
9973 | // No conflict between a tag and a non-tag. | ||||||
9974 | if (!NonTag) return false; | ||||||
9975 | |||||||
9976 | Diag(Using->getLocation(), diag::err_using_decl_conflict); | ||||||
9977 | Diag(Target->getLocation(), diag::note_using_decl_target); | ||||||
9978 | Diag(NonTag->getLocation(), diag::note_using_decl_conflict); | ||||||
9979 | Using->setInvalidDecl(); | ||||||
9980 | return true; | ||||||
9981 | } | ||||||
9982 | |||||||
9983 | /// Determine whether a direct base class is a virtual base class. | ||||||
9984 | static bool isVirtualDirectBase(CXXRecordDecl *Derived, CXXRecordDecl *Base) { | ||||||
9985 | if (!Derived->getNumVBases()) | ||||||
9986 | return false; | ||||||
9987 | for (auto &B : Derived->bases()) | ||||||
9988 | if (B.getType()->getAsCXXRecordDecl() == Base) | ||||||
9989 | return B.isVirtual(); | ||||||
9990 | llvm_unreachable("not a direct base class")::llvm::llvm_unreachable_internal("not a direct base class", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 9990); | ||||||
9991 | } | ||||||
9992 | |||||||
9993 | /// Builds a shadow declaration corresponding to a 'using' declaration. | ||||||
9994 | UsingShadowDecl *Sema::BuildUsingShadowDecl(Scope *S, | ||||||
9995 | UsingDecl *UD, | ||||||
9996 | NamedDecl *Orig, | ||||||
9997 | UsingShadowDecl *PrevDecl) { | ||||||
9998 | // If we resolved to another shadow declaration, just coalesce them. | ||||||
9999 | NamedDecl *Target = Orig; | ||||||
10000 | if (isa<UsingShadowDecl>(Target)) { | ||||||
10001 | Target = cast<UsingShadowDecl>(Target)->getTargetDecl(); | ||||||
10002 | assert(!isa<UsingShadowDecl>(Target) && "nested shadow declaration")((!isa<UsingShadowDecl>(Target) && "nested shadow declaration" ) ? static_cast<void> (0) : __assert_fail ("!isa<UsingShadowDecl>(Target) && \"nested shadow declaration\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10002, __PRETTY_FUNCTION__)); | ||||||
10003 | } | ||||||
10004 | |||||||
10005 | NamedDecl *NonTemplateTarget = Target; | ||||||
10006 | if (auto *TargetTD = dyn_cast<TemplateDecl>(Target)) | ||||||
10007 | NonTemplateTarget = TargetTD->getTemplatedDecl(); | ||||||
10008 | |||||||
10009 | UsingShadowDecl *Shadow; | ||||||
10010 | if (NonTemplateTarget && isa<CXXConstructorDecl>(NonTemplateTarget)) { | ||||||
10011 | bool IsVirtualBase = | ||||||
10012 | isVirtualDirectBase(cast<CXXRecordDecl>(CurContext), | ||||||
10013 | UD->getQualifier()->getAsRecordDecl()); | ||||||
10014 | Shadow = ConstructorUsingShadowDecl::Create( | ||||||
10015 | Context, CurContext, UD->getLocation(), UD, Orig, IsVirtualBase); | ||||||
10016 | } else { | ||||||
10017 | Shadow = UsingShadowDecl::Create(Context, CurContext, UD->getLocation(), UD, | ||||||
10018 | Target); | ||||||
10019 | } | ||||||
10020 | UD->addShadowDecl(Shadow); | ||||||
10021 | |||||||
10022 | Shadow->setAccess(UD->getAccess()); | ||||||
10023 | if (Orig->isInvalidDecl() || UD->isInvalidDecl()) | ||||||
10024 | Shadow->setInvalidDecl(); | ||||||
10025 | |||||||
10026 | Shadow->setPreviousDecl(PrevDecl); | ||||||
10027 | |||||||
10028 | if (S) | ||||||
10029 | PushOnScopeChains(Shadow, S); | ||||||
10030 | else | ||||||
10031 | CurContext->addDecl(Shadow); | ||||||
10032 | |||||||
10033 | |||||||
10034 | return Shadow; | ||||||
10035 | } | ||||||
10036 | |||||||
10037 | /// Hides a using shadow declaration. This is required by the current | ||||||
10038 | /// using-decl implementation when a resolvable using declaration in a | ||||||
10039 | /// class is followed by a declaration which would hide or override | ||||||
10040 | /// one or more of the using decl's targets; for example: | ||||||
10041 | /// | ||||||
10042 | /// struct Base { void foo(int); }; | ||||||
10043 | /// struct Derived : Base { | ||||||
10044 | /// using Base::foo; | ||||||
10045 | /// void foo(int); | ||||||
10046 | /// }; | ||||||
10047 | /// | ||||||
10048 | /// The governing language is C++03 [namespace.udecl]p12: | ||||||
10049 | /// | ||||||
10050 | /// When a using-declaration brings names from a base class into a | ||||||
10051 | /// derived class scope, member functions in the derived class | ||||||
10052 | /// override and/or hide member functions with the same name and | ||||||
10053 | /// parameter types in a base class (rather than conflicting). | ||||||
10054 | /// | ||||||
10055 | /// There are two ways to implement this: | ||||||
10056 | /// (1) optimistically create shadow decls when they're not hidden | ||||||
10057 | /// by existing declarations, or | ||||||
10058 | /// (2) don't create any shadow decls (or at least don't make them | ||||||
10059 | /// visible) until we've fully parsed/instantiated the class. | ||||||
10060 | /// The problem with (1) is that we might have to retroactively remove | ||||||
10061 | /// a shadow decl, which requires several O(n) operations because the | ||||||
10062 | /// decl structures are (very reasonably) not designed for removal. | ||||||
10063 | /// (2) avoids this but is very fiddly and phase-dependent. | ||||||
10064 | void Sema::HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow) { | ||||||
10065 | if (Shadow->getDeclName().getNameKind() == | ||||||
10066 | DeclarationName::CXXConversionFunctionName) | ||||||
10067 | cast<CXXRecordDecl>(Shadow->getDeclContext())->removeConversion(Shadow); | ||||||
10068 | |||||||
10069 | // Remove it from the DeclContext... | ||||||
10070 | Shadow->getDeclContext()->removeDecl(Shadow); | ||||||
10071 | |||||||
10072 | // ...and the scope, if applicable... | ||||||
10073 | if (S) { | ||||||
10074 | S->RemoveDecl(Shadow); | ||||||
10075 | IdResolver.RemoveDecl(Shadow); | ||||||
10076 | } | ||||||
10077 | |||||||
10078 | // ...and the using decl. | ||||||
10079 | Shadow->getUsingDecl()->removeShadowDecl(Shadow); | ||||||
10080 | |||||||
10081 | // TODO: complain somehow if Shadow was used. It shouldn't | ||||||
10082 | // be possible for this to happen, because...? | ||||||
10083 | } | ||||||
10084 | |||||||
10085 | /// Find the base specifier for a base class with the given type. | ||||||
10086 | static CXXBaseSpecifier *findDirectBaseWithType(CXXRecordDecl *Derived, | ||||||
10087 | QualType DesiredBase, | ||||||
10088 | bool &AnyDependentBases) { | ||||||
10089 | // Check whether the named type is a direct base class. | ||||||
10090 | CanQualType CanonicalDesiredBase = DesiredBase->getCanonicalTypeUnqualified() | ||||||
10091 | .getUnqualifiedType(); | ||||||
10092 | for (auto &Base : Derived->bases()) { | ||||||
10093 | CanQualType BaseType = Base.getType()->getCanonicalTypeUnqualified(); | ||||||
10094 | if (CanonicalDesiredBase == BaseType) | ||||||
10095 | return &Base; | ||||||
10096 | if (BaseType->isDependentType()) | ||||||
10097 | AnyDependentBases = true; | ||||||
10098 | } | ||||||
10099 | return nullptr; | ||||||
10100 | } | ||||||
10101 | |||||||
10102 | namespace { | ||||||
10103 | class UsingValidatorCCC final : public CorrectionCandidateCallback { | ||||||
10104 | public: | ||||||
10105 | UsingValidatorCCC(bool HasTypenameKeyword, bool IsInstantiation, | ||||||
10106 | NestedNameSpecifier *NNS, CXXRecordDecl *RequireMemberOf) | ||||||
10107 | : HasTypenameKeyword(HasTypenameKeyword), | ||||||
10108 | IsInstantiation(IsInstantiation), OldNNS(NNS), | ||||||
10109 | RequireMemberOf(RequireMemberOf) {} | ||||||
10110 | |||||||
10111 | bool ValidateCandidate(const TypoCorrection &Candidate) override { | ||||||
10112 | NamedDecl *ND = Candidate.getCorrectionDecl(); | ||||||
10113 | |||||||
10114 | // Keywords are not valid here. | ||||||
10115 | if (!ND || isa<NamespaceDecl>(ND)) | ||||||
10116 | return false; | ||||||
10117 | |||||||
10118 | // Completely unqualified names are invalid for a 'using' declaration. | ||||||
10119 | if (Candidate.WillReplaceSpecifier() && !Candidate.getCorrectionSpecifier()) | ||||||
10120 | return false; | ||||||
10121 | |||||||
10122 | // FIXME: Don't correct to a name that CheckUsingDeclRedeclaration would | ||||||
10123 | // reject. | ||||||
10124 | |||||||
10125 | if (RequireMemberOf) { | ||||||
10126 | auto *FoundRecord = dyn_cast<CXXRecordDecl>(ND); | ||||||
10127 | if (FoundRecord && FoundRecord->isInjectedClassName()) { | ||||||
10128 | // No-one ever wants a using-declaration to name an injected-class-name | ||||||
10129 | // of a base class, unless they're declaring an inheriting constructor. | ||||||
10130 | ASTContext &Ctx = ND->getASTContext(); | ||||||
10131 | if (!Ctx.getLangOpts().CPlusPlus11) | ||||||
10132 | return false; | ||||||
10133 | QualType FoundType = Ctx.getRecordType(FoundRecord); | ||||||
10134 | |||||||
10135 | // Check that the injected-class-name is named as a member of its own | ||||||
10136 | // type; we don't want to suggest 'using Derived::Base;', since that | ||||||
10137 | // means something else. | ||||||
10138 | NestedNameSpecifier *Specifier = | ||||||
10139 | Candidate.WillReplaceSpecifier() | ||||||
10140 | ? Candidate.getCorrectionSpecifier() | ||||||
10141 | : OldNNS; | ||||||
10142 | if (!Specifier->getAsType() || | ||||||
10143 | !Ctx.hasSameType(QualType(Specifier->getAsType(), 0), FoundType)) | ||||||
10144 | return false; | ||||||
10145 | |||||||
10146 | // Check that this inheriting constructor declaration actually names a | ||||||
10147 | // direct base class of the current class. | ||||||
10148 | bool AnyDependentBases = false; | ||||||
10149 | if (!findDirectBaseWithType(RequireMemberOf, | ||||||
10150 | Ctx.getRecordType(FoundRecord), | ||||||
10151 | AnyDependentBases) && | ||||||
10152 | !AnyDependentBases) | ||||||
10153 | return false; | ||||||
10154 | } else { | ||||||
10155 | auto *RD = dyn_cast<CXXRecordDecl>(ND->getDeclContext()); | ||||||
10156 | if (!RD || RequireMemberOf->isProvablyNotDerivedFrom(RD)) | ||||||
10157 | return false; | ||||||
10158 | |||||||
10159 | // FIXME: Check that the base class member is accessible? | ||||||
10160 | } | ||||||
10161 | } else { | ||||||
10162 | auto *FoundRecord = dyn_cast<CXXRecordDecl>(ND); | ||||||
10163 | if (FoundRecord && FoundRecord->isInjectedClassName()) | ||||||
10164 | return false; | ||||||
10165 | } | ||||||
10166 | |||||||
10167 | if (isa<TypeDecl>(ND)) | ||||||
10168 | return HasTypenameKeyword || !IsInstantiation; | ||||||
10169 | |||||||
10170 | return !HasTypenameKeyword; | ||||||
10171 | } | ||||||
10172 | |||||||
10173 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
10174 | return std::make_unique<UsingValidatorCCC>(*this); | ||||||
10175 | } | ||||||
10176 | |||||||
10177 | private: | ||||||
10178 | bool HasTypenameKeyword; | ||||||
10179 | bool IsInstantiation; | ||||||
10180 | NestedNameSpecifier *OldNNS; | ||||||
10181 | CXXRecordDecl *RequireMemberOf; | ||||||
10182 | }; | ||||||
10183 | } // end anonymous namespace | ||||||
10184 | |||||||
10185 | /// Builds a using declaration. | ||||||
10186 | /// | ||||||
10187 | /// \param IsInstantiation - Whether this call arises from an | ||||||
10188 | /// instantiation of an unresolved using declaration. We treat | ||||||
10189 | /// the lookup differently for these declarations. | ||||||
10190 | NamedDecl *Sema::BuildUsingDeclaration( | ||||||
10191 | Scope *S, AccessSpecifier AS, SourceLocation UsingLoc, | ||||||
10192 | bool HasTypenameKeyword, SourceLocation TypenameLoc, CXXScopeSpec &SS, | ||||||
10193 | DeclarationNameInfo NameInfo, SourceLocation EllipsisLoc, | ||||||
10194 | const ParsedAttributesView &AttrList, bool IsInstantiation) { | ||||||
10195 | assert(!SS.isInvalid() && "Invalid CXXScopeSpec.")((!SS.isInvalid() && "Invalid CXXScopeSpec.") ? static_cast <void> (0) : __assert_fail ("!SS.isInvalid() && \"Invalid CXXScopeSpec.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10195, __PRETTY_FUNCTION__)); | ||||||
10196 | SourceLocation IdentLoc = NameInfo.getLoc(); | ||||||
10197 | assert(IdentLoc.isValid() && "Invalid TargetName location.")((IdentLoc.isValid() && "Invalid TargetName location." ) ? static_cast<void> (0) : __assert_fail ("IdentLoc.isValid() && \"Invalid TargetName location.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10197, __PRETTY_FUNCTION__)); | ||||||
10198 | |||||||
10199 | // FIXME: We ignore attributes for now. | ||||||
10200 | |||||||
10201 | // For an inheriting constructor declaration, the name of the using | ||||||
10202 | // declaration is the name of a constructor in this class, not in the | ||||||
10203 | // base class. | ||||||
10204 | DeclarationNameInfo UsingName = NameInfo; | ||||||
10205 | if (UsingName.getName().getNameKind() == DeclarationName::CXXConstructorName) | ||||||
10206 | if (auto *RD = dyn_cast<CXXRecordDecl>(CurContext)) | ||||||
10207 | UsingName.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||
10208 | Context.getCanonicalType(Context.getRecordType(RD)))); | ||||||
10209 | |||||||
10210 | // Do the redeclaration lookup in the current scope. | ||||||
10211 | LookupResult Previous(*this, UsingName, LookupUsingDeclName, | ||||||
10212 | ForVisibleRedeclaration); | ||||||
10213 | Previous.setHideTags(false); | ||||||
10214 | if (S) { | ||||||
10215 | LookupName(Previous, S); | ||||||
10216 | |||||||
10217 | // It is really dumb that we have to do this. | ||||||
10218 | LookupResult::Filter F = Previous.makeFilter(); | ||||||
10219 | while (F.hasNext()) { | ||||||
10220 | NamedDecl *D = F.next(); | ||||||
10221 | if (!isDeclInScope(D, CurContext, S)) | ||||||
10222 | F.erase(); | ||||||
10223 | // If we found a local extern declaration that's not ordinarily visible, | ||||||
10224 | // and this declaration is being added to a non-block scope, ignore it. | ||||||
10225 | // We're only checking for scope conflicts here, not also for violations | ||||||
10226 | // of the linkage rules. | ||||||
10227 | else if (!CurContext->isFunctionOrMethod() && D->isLocalExternDecl() && | ||||||
10228 | !(D->getIdentifierNamespace() & Decl::IDNS_Ordinary)) | ||||||
10229 | F.erase(); | ||||||
10230 | } | ||||||
10231 | F.done(); | ||||||
10232 | } else { | ||||||
10233 | assert(IsInstantiation && "no scope in non-instantiation")((IsInstantiation && "no scope in non-instantiation") ? static_cast<void> (0) : __assert_fail ("IsInstantiation && \"no scope in non-instantiation\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10233, __PRETTY_FUNCTION__)); | ||||||
10234 | if (CurContext->isRecord()) | ||||||
10235 | LookupQualifiedName(Previous, CurContext); | ||||||
10236 | else { | ||||||
10237 | // No redeclaration check is needed here; in non-member contexts we | ||||||
10238 | // diagnosed all possible conflicts with other using-declarations when | ||||||
10239 | // building the template: | ||||||
10240 | // | ||||||
10241 | // For a dependent non-type using declaration, the only valid case is | ||||||
10242 | // if we instantiate to a single enumerator. We check for conflicts | ||||||
10243 | // between shadow declarations we introduce, and we check in the template | ||||||
10244 | // definition for conflicts between a non-type using declaration and any | ||||||
10245 | // other declaration, which together covers all cases. | ||||||
10246 | // | ||||||
10247 | // A dependent typename using declaration will never successfully | ||||||
10248 | // instantiate, since it will always name a class member, so we reject | ||||||
10249 | // that in the template definition. | ||||||
10250 | } | ||||||
10251 | } | ||||||
10252 | |||||||
10253 | // Check for invalid redeclarations. | ||||||
10254 | if (CheckUsingDeclRedeclaration(UsingLoc, HasTypenameKeyword, | ||||||
10255 | SS, IdentLoc, Previous)) | ||||||
10256 | return nullptr; | ||||||
10257 | |||||||
10258 | // Check for bad qualifiers. | ||||||
10259 | if (CheckUsingDeclQualifier(UsingLoc, HasTypenameKeyword, SS, NameInfo, | ||||||
10260 | IdentLoc)) | ||||||
10261 | return nullptr; | ||||||
10262 | |||||||
10263 | DeclContext *LookupContext = computeDeclContext(SS); | ||||||
10264 | NamedDecl *D; | ||||||
10265 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | ||||||
10266 | if (!LookupContext || EllipsisLoc.isValid()) { | ||||||
10267 | if (HasTypenameKeyword) { | ||||||
10268 | // FIXME: not all declaration name kinds are legal here | ||||||
10269 | D = UnresolvedUsingTypenameDecl::Create(Context, CurContext, | ||||||
10270 | UsingLoc, TypenameLoc, | ||||||
10271 | QualifierLoc, | ||||||
10272 | IdentLoc, NameInfo.getName(), | ||||||
10273 | EllipsisLoc); | ||||||
10274 | } else { | ||||||
10275 | D = UnresolvedUsingValueDecl::Create(Context, CurContext, UsingLoc, | ||||||
10276 | QualifierLoc, NameInfo, EllipsisLoc); | ||||||
10277 | } | ||||||
10278 | D->setAccess(AS); | ||||||
10279 | CurContext->addDecl(D); | ||||||
10280 | return D; | ||||||
10281 | } | ||||||
10282 | |||||||
10283 | auto Build = [&](bool Invalid) { | ||||||
10284 | UsingDecl *UD = | ||||||
10285 | UsingDecl::Create(Context, CurContext, UsingLoc, QualifierLoc, | ||||||
10286 | UsingName, HasTypenameKeyword); | ||||||
10287 | UD->setAccess(AS); | ||||||
10288 | CurContext->addDecl(UD); | ||||||
10289 | UD->setInvalidDecl(Invalid); | ||||||
10290 | return UD; | ||||||
10291 | }; | ||||||
10292 | auto BuildInvalid = [&]{ return Build(true); }; | ||||||
10293 | auto BuildValid = [&]{ return Build(false); }; | ||||||
10294 | |||||||
10295 | if (RequireCompleteDeclContext(SS, LookupContext)) | ||||||
10296 | return BuildInvalid(); | ||||||
10297 | |||||||
10298 | // Look up the target name. | ||||||
10299 | LookupResult R(*this, NameInfo, LookupOrdinaryName); | ||||||
10300 | |||||||
10301 | // Unlike most lookups, we don't always want to hide tag | ||||||
10302 | // declarations: tag names are visible through the using declaration | ||||||
10303 | // even if hidden by ordinary names, *except* in a dependent context | ||||||
10304 | // where it's important for the sanity of two-phase lookup. | ||||||
10305 | if (!IsInstantiation) | ||||||
10306 | R.setHideTags(false); | ||||||
10307 | |||||||
10308 | // For the purposes of this lookup, we have a base object type | ||||||
10309 | // equal to that of the current context. | ||||||
10310 | if (CurContext->isRecord()) { | ||||||
10311 | R.setBaseObjectType( | ||||||
10312 | Context.getTypeDeclType(cast<CXXRecordDecl>(CurContext))); | ||||||
10313 | } | ||||||
10314 | |||||||
10315 | LookupQualifiedName(R, LookupContext); | ||||||
10316 | |||||||
10317 | // Try to correct typos if possible. If constructor name lookup finds no | ||||||
10318 | // results, that means the named class has no explicit constructors, and we | ||||||
10319 | // suppressed declaring implicit ones (probably because it's dependent or | ||||||
10320 | // invalid). | ||||||
10321 | if (R.empty() && | ||||||
10322 | NameInfo.getName().getNameKind() != DeclarationName::CXXConstructorName) { | ||||||
10323 | // HACK: Work around a bug in libstdc++'s detection of ::gets. Sometimes | ||||||
10324 | // it will believe that glibc provides a ::gets in cases where it does not, | ||||||
10325 | // and will try to pull it into namespace std with a using-declaration. | ||||||
10326 | // Just ignore the using-declaration in that case. | ||||||
10327 | auto *II = NameInfo.getName().getAsIdentifierInfo(); | ||||||
10328 | if (getLangOpts().CPlusPlus14 && II && II->isStr("gets") && | ||||||
10329 | CurContext->isStdNamespace() && | ||||||
10330 | isa<TranslationUnitDecl>(LookupContext) && | ||||||
10331 | getSourceManager().isInSystemHeader(UsingLoc)) | ||||||
10332 | return nullptr; | ||||||
10333 | UsingValidatorCCC CCC(HasTypenameKeyword, IsInstantiation, SS.getScopeRep(), | ||||||
10334 | dyn_cast<CXXRecordDecl>(CurContext)); | ||||||
10335 | if (TypoCorrection Corrected = | ||||||
10336 | CorrectTypo(R.getLookupNameInfo(), R.getLookupKind(), S, &SS, CCC, | ||||||
10337 | CTK_ErrorRecovery)) { | ||||||
10338 | // We reject candidates where DroppedSpecifier == true, hence the | ||||||
10339 | // literal '0' below. | ||||||
10340 | diagnoseTypo(Corrected, PDiag(diag::err_no_member_suggest) | ||||||
10341 | << NameInfo.getName() << LookupContext << 0 | ||||||
10342 | << SS.getRange()); | ||||||
10343 | |||||||
10344 | // If we picked a correction with no attached Decl we can't do anything | ||||||
10345 | // useful with it, bail out. | ||||||
10346 | NamedDecl *ND = Corrected.getCorrectionDecl(); | ||||||
10347 | if (!ND) | ||||||
10348 | return BuildInvalid(); | ||||||
10349 | |||||||
10350 | // If we corrected to an inheriting constructor, handle it as one. | ||||||
10351 | auto *RD = dyn_cast<CXXRecordDecl>(ND); | ||||||
10352 | if (RD && RD->isInjectedClassName()) { | ||||||
10353 | // The parent of the injected class name is the class itself. | ||||||
10354 | RD = cast<CXXRecordDecl>(RD->getParent()); | ||||||
10355 | |||||||
10356 | // Fix up the information we'll use to build the using declaration. | ||||||
10357 | if (Corrected.WillReplaceSpecifier()) { | ||||||
10358 | NestedNameSpecifierLocBuilder Builder; | ||||||
10359 | Builder.MakeTrivial(Context, Corrected.getCorrectionSpecifier(), | ||||||
10360 | QualifierLoc.getSourceRange()); | ||||||
10361 | QualifierLoc = Builder.getWithLocInContext(Context); | ||||||
10362 | } | ||||||
10363 | |||||||
10364 | // In this case, the name we introduce is the name of a derived class | ||||||
10365 | // constructor. | ||||||
10366 | auto *CurClass = cast<CXXRecordDecl>(CurContext); | ||||||
10367 | UsingName.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||
10368 | Context.getCanonicalType(Context.getRecordType(CurClass)))); | ||||||
10369 | UsingName.setNamedTypeInfo(nullptr); | ||||||
10370 | for (auto *Ctor : LookupConstructors(RD)) | ||||||
10371 | R.addDecl(Ctor); | ||||||
10372 | R.resolveKind(); | ||||||
10373 | } else { | ||||||
10374 | // FIXME: Pick up all the declarations if we found an overloaded | ||||||
10375 | // function. | ||||||
10376 | UsingName.setName(ND->getDeclName()); | ||||||
10377 | R.addDecl(ND); | ||||||
10378 | } | ||||||
10379 | } else { | ||||||
10380 | Diag(IdentLoc, diag::err_no_member) | ||||||
10381 | << NameInfo.getName() << LookupContext << SS.getRange(); | ||||||
10382 | return BuildInvalid(); | ||||||
10383 | } | ||||||
10384 | } | ||||||
10385 | |||||||
10386 | if (R.isAmbiguous()) | ||||||
10387 | return BuildInvalid(); | ||||||
10388 | |||||||
10389 | if (HasTypenameKeyword) { | ||||||
10390 | // If we asked for a typename and got a non-type decl, error out. | ||||||
10391 | if (!R.getAsSingle<TypeDecl>()) { | ||||||
10392 | Diag(IdentLoc, diag::err_using_typename_non_type); | ||||||
10393 | for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) | ||||||
10394 | Diag((*I)->getUnderlyingDecl()->getLocation(), | ||||||
10395 | diag::note_using_decl_target); | ||||||
10396 | return BuildInvalid(); | ||||||
10397 | } | ||||||
10398 | } else { | ||||||
10399 | // If we asked for a non-typename and we got a type, error out, | ||||||
10400 | // but only if this is an instantiation of an unresolved using | ||||||
10401 | // decl. Otherwise just silently find the type name. | ||||||
10402 | if (IsInstantiation && R.getAsSingle<TypeDecl>()) { | ||||||
10403 | Diag(IdentLoc, diag::err_using_dependent_value_is_type); | ||||||
10404 | Diag(R.getFoundDecl()->getLocation(), diag::note_using_decl_target); | ||||||
10405 | return BuildInvalid(); | ||||||
10406 | } | ||||||
10407 | } | ||||||
10408 | |||||||
10409 | // C++14 [namespace.udecl]p6: | ||||||
10410 | // A using-declaration shall not name a namespace. | ||||||
10411 | if (R.getAsSingle<NamespaceDecl>()) { | ||||||
10412 | Diag(IdentLoc, diag::err_using_decl_can_not_refer_to_namespace) | ||||||
10413 | << SS.getRange(); | ||||||
10414 | return BuildInvalid(); | ||||||
10415 | } | ||||||
10416 | |||||||
10417 | // C++14 [namespace.udecl]p7: | ||||||
10418 | // A using-declaration shall not name a scoped enumerator. | ||||||
10419 | if (auto *ED = R.getAsSingle<EnumConstantDecl>()) { | ||||||
10420 | if (cast<EnumDecl>(ED->getDeclContext())->isScoped()) { | ||||||
10421 | Diag(IdentLoc, diag::err_using_decl_can_not_refer_to_scoped_enum) | ||||||
10422 | << SS.getRange(); | ||||||
10423 | return BuildInvalid(); | ||||||
10424 | } | ||||||
10425 | } | ||||||
10426 | |||||||
10427 | UsingDecl *UD = BuildValid(); | ||||||
10428 | |||||||
10429 | // Some additional rules apply to inheriting constructors. | ||||||
10430 | if (UsingName.getName().getNameKind() == | ||||||
10431 | DeclarationName::CXXConstructorName) { | ||||||
10432 | // Suppress access diagnostics; the access check is instead performed at the | ||||||
10433 | // point of use for an inheriting constructor. | ||||||
10434 | R.suppressDiagnostics(); | ||||||
10435 | if (CheckInheritingConstructorUsingDecl(UD)) | ||||||
10436 | return UD; | ||||||
10437 | } | ||||||
10438 | |||||||
10439 | for (LookupResult::iterator I = R.begin(), E = R.end(); I != E; ++I) { | ||||||
10440 | UsingShadowDecl *PrevDecl = nullptr; | ||||||
10441 | if (!CheckUsingShadowDecl(UD, *I, Previous, PrevDecl)) | ||||||
10442 | BuildUsingShadowDecl(S, UD, *I, PrevDecl); | ||||||
10443 | } | ||||||
10444 | |||||||
10445 | return UD; | ||||||
10446 | } | ||||||
10447 | |||||||
10448 | NamedDecl *Sema::BuildUsingPackDecl(NamedDecl *InstantiatedFrom, | ||||||
10449 | ArrayRef<NamedDecl *> Expansions) { | ||||||
10450 | assert(isa<UnresolvedUsingValueDecl>(InstantiatedFrom) ||((isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa <UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa< UsingPackDecl>(InstantiatedFrom)) ? static_cast<void> (0) : __assert_fail ("isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10452, __PRETTY_FUNCTION__)) | ||||||
10451 | isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) ||((isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa <UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa< UsingPackDecl>(InstantiatedFrom)) ? static_cast<void> (0) : __assert_fail ("isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10452, __PRETTY_FUNCTION__)) | ||||||
10452 | isa<UsingPackDecl>(InstantiatedFrom))((isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa <UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa< UsingPackDecl>(InstantiatedFrom)) ? static_cast<void> (0) : __assert_fail ("isa<UnresolvedUsingValueDecl>(InstantiatedFrom) || isa<UnresolvedUsingTypenameDecl>(InstantiatedFrom) || isa<UsingPackDecl>(InstantiatedFrom)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10452, __PRETTY_FUNCTION__)); | ||||||
10453 | |||||||
10454 | auto *UPD = | ||||||
10455 | UsingPackDecl::Create(Context, CurContext, InstantiatedFrom, Expansions); | ||||||
10456 | UPD->setAccess(InstantiatedFrom->getAccess()); | ||||||
10457 | CurContext->addDecl(UPD); | ||||||
10458 | return UPD; | ||||||
10459 | } | ||||||
10460 | |||||||
10461 | /// Additional checks for a using declaration referring to a constructor name. | ||||||
10462 | bool Sema::CheckInheritingConstructorUsingDecl(UsingDecl *UD) { | ||||||
10463 | assert(!UD->hasTypename() && "expecting a constructor name")((!UD->hasTypename() && "expecting a constructor name" ) ? static_cast<void> (0) : __assert_fail ("!UD->hasTypename() && \"expecting a constructor name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10463, __PRETTY_FUNCTION__)); | ||||||
10464 | |||||||
10465 | const Type *SourceType = UD->getQualifier()->getAsType(); | ||||||
10466 | assert(SourceType &&((SourceType && "Using decl naming constructor doesn't have type in scope spec." ) ? static_cast<void> (0) : __assert_fail ("SourceType && \"Using decl naming constructor doesn't have type in scope spec.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10467, __PRETTY_FUNCTION__)) | ||||||
10467 | "Using decl naming constructor doesn't have type in scope spec.")((SourceType && "Using decl naming constructor doesn't have type in scope spec." ) ? static_cast<void> (0) : __assert_fail ("SourceType && \"Using decl naming constructor doesn't have type in scope spec.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10467, __PRETTY_FUNCTION__)); | ||||||
10468 | CXXRecordDecl *TargetClass = cast<CXXRecordDecl>(CurContext); | ||||||
10469 | |||||||
10470 | // Check whether the named type is a direct base class. | ||||||
10471 | bool AnyDependentBases = false; | ||||||
10472 | auto *Base = findDirectBaseWithType(TargetClass, QualType(SourceType, 0), | ||||||
10473 | AnyDependentBases); | ||||||
10474 | if (!Base && !AnyDependentBases) { | ||||||
10475 | Diag(UD->getUsingLoc(), | ||||||
10476 | diag::err_using_decl_constructor_not_in_direct_base) | ||||||
10477 | << UD->getNameInfo().getSourceRange() | ||||||
10478 | << QualType(SourceType, 0) << TargetClass; | ||||||
10479 | UD->setInvalidDecl(); | ||||||
10480 | return true; | ||||||
10481 | } | ||||||
10482 | |||||||
10483 | if (Base) | ||||||
10484 | Base->setInheritConstructors(); | ||||||
10485 | |||||||
10486 | return false; | ||||||
10487 | } | ||||||
10488 | |||||||
10489 | /// Checks that the given using declaration is not an invalid | ||||||
10490 | /// redeclaration. Note that this is checking only for the using decl | ||||||
10491 | /// itself, not for any ill-formedness among the UsingShadowDecls. | ||||||
10492 | bool Sema::CheckUsingDeclRedeclaration(SourceLocation UsingLoc, | ||||||
10493 | bool HasTypenameKeyword, | ||||||
10494 | const CXXScopeSpec &SS, | ||||||
10495 | SourceLocation NameLoc, | ||||||
10496 | const LookupResult &Prev) { | ||||||
10497 | NestedNameSpecifier *Qual = SS.getScopeRep(); | ||||||
10498 | |||||||
10499 | // C++03 [namespace.udecl]p8: | ||||||
10500 | // C++0x [namespace.udecl]p10: | ||||||
10501 | // A using-declaration is a declaration and can therefore be used | ||||||
10502 | // repeatedly where (and only where) multiple declarations are | ||||||
10503 | // allowed. | ||||||
10504 | // | ||||||
10505 | // That's in non-member contexts. | ||||||
10506 | if (!CurContext->getRedeclContext()->isRecord()) { | ||||||
10507 | // A dependent qualifier outside a class can only ever resolve to an | ||||||
10508 | // enumeration type. Therefore it conflicts with any other non-type | ||||||
10509 | // declaration in the same scope. | ||||||
10510 | // FIXME: How should we check for dependent type-type conflicts at block | ||||||
10511 | // scope? | ||||||
10512 | if (Qual->isDependent() && !HasTypenameKeyword) { | ||||||
10513 | for (auto *D : Prev) { | ||||||
10514 | if (!isa<TypeDecl>(D) && !isa<UsingDecl>(D) && !isa<UsingPackDecl>(D)) { | ||||||
10515 | bool OldCouldBeEnumerator = | ||||||
10516 | isa<UnresolvedUsingValueDecl>(D) || isa<EnumConstantDecl>(D); | ||||||
10517 | Diag(NameLoc, | ||||||
10518 | OldCouldBeEnumerator ? diag::err_redefinition | ||||||
10519 | : diag::err_redefinition_different_kind) | ||||||
10520 | << Prev.getLookupName(); | ||||||
10521 | Diag(D->getLocation(), diag::note_previous_definition); | ||||||
10522 | return true; | ||||||
10523 | } | ||||||
10524 | } | ||||||
10525 | } | ||||||
10526 | return false; | ||||||
10527 | } | ||||||
10528 | |||||||
10529 | for (LookupResult::iterator I = Prev.begin(), E = Prev.end(); I != E; ++I) { | ||||||
10530 | NamedDecl *D = *I; | ||||||
10531 | |||||||
10532 | bool DTypename; | ||||||
10533 | NestedNameSpecifier *DQual; | ||||||
10534 | if (UsingDecl *UD = dyn_cast<UsingDecl>(D)) { | ||||||
10535 | DTypename = UD->hasTypename(); | ||||||
10536 | DQual = UD->getQualifier(); | ||||||
10537 | } else if (UnresolvedUsingValueDecl *UD | ||||||
10538 | = dyn_cast<UnresolvedUsingValueDecl>(D)) { | ||||||
10539 | DTypename = false; | ||||||
10540 | DQual = UD->getQualifier(); | ||||||
10541 | } else if (UnresolvedUsingTypenameDecl *UD | ||||||
10542 | = dyn_cast<UnresolvedUsingTypenameDecl>(D)) { | ||||||
10543 | DTypename = true; | ||||||
10544 | DQual = UD->getQualifier(); | ||||||
10545 | } else continue; | ||||||
10546 | |||||||
10547 | // using decls differ if one says 'typename' and the other doesn't. | ||||||
10548 | // FIXME: non-dependent using decls? | ||||||
10549 | if (HasTypenameKeyword != DTypename) continue; | ||||||
10550 | |||||||
10551 | // using decls differ if they name different scopes (but note that | ||||||
10552 | // template instantiation can cause this check to trigger when it | ||||||
10553 | // didn't before instantiation). | ||||||
10554 | if (Context.getCanonicalNestedNameSpecifier(Qual) != | ||||||
10555 | Context.getCanonicalNestedNameSpecifier(DQual)) | ||||||
10556 | continue; | ||||||
10557 | |||||||
10558 | Diag(NameLoc, diag::err_using_decl_redeclaration) << SS.getRange(); | ||||||
10559 | Diag(D->getLocation(), diag::note_using_decl) << 1; | ||||||
10560 | return true; | ||||||
10561 | } | ||||||
10562 | |||||||
10563 | return false; | ||||||
10564 | } | ||||||
10565 | |||||||
10566 | |||||||
10567 | /// Checks that the given nested-name qualifier used in a using decl | ||||||
10568 | /// in the current context is appropriately related to the current | ||||||
10569 | /// scope. If an error is found, diagnoses it and returns true. | ||||||
10570 | bool Sema::CheckUsingDeclQualifier(SourceLocation UsingLoc, | ||||||
10571 | bool HasTypename, | ||||||
10572 | const CXXScopeSpec &SS, | ||||||
10573 | const DeclarationNameInfo &NameInfo, | ||||||
10574 | SourceLocation NameLoc) { | ||||||
10575 | DeclContext *NamedContext = computeDeclContext(SS); | ||||||
10576 | |||||||
10577 | if (!CurContext->isRecord()) { | ||||||
10578 | // C++03 [namespace.udecl]p3: | ||||||
10579 | // C++0x [namespace.udecl]p8: | ||||||
10580 | // A using-declaration for a class member shall be a member-declaration. | ||||||
10581 | |||||||
10582 | // If we weren't able to compute a valid scope, it might validly be a | ||||||
10583 | // dependent class scope or a dependent enumeration unscoped scope. If | ||||||
10584 | // we have a 'typename' keyword, the scope must resolve to a class type. | ||||||
10585 | if ((HasTypename && !NamedContext) || | ||||||
10586 | (NamedContext && NamedContext->getRedeclContext()->isRecord())) { | ||||||
10587 | auto *RD = NamedContext | ||||||
10588 | ? cast<CXXRecordDecl>(NamedContext->getRedeclContext()) | ||||||
10589 | : nullptr; | ||||||
10590 | if (RD && RequireCompleteDeclContext(const_cast<CXXScopeSpec&>(SS), RD)) | ||||||
10591 | RD = nullptr; | ||||||
10592 | |||||||
10593 | Diag(NameLoc, diag::err_using_decl_can_not_refer_to_class_member) | ||||||
10594 | << SS.getRange(); | ||||||
10595 | |||||||
10596 | // If we have a complete, non-dependent source type, try to suggest a | ||||||
10597 | // way to get the same effect. | ||||||
10598 | if (!RD) | ||||||
10599 | return true; | ||||||
10600 | |||||||
10601 | // Find what this using-declaration was referring to. | ||||||
10602 | LookupResult R(*this, NameInfo, LookupOrdinaryName); | ||||||
10603 | R.setHideTags(false); | ||||||
10604 | R.suppressDiagnostics(); | ||||||
10605 | LookupQualifiedName(R, RD); | ||||||
10606 | |||||||
10607 | if (R.getAsSingle<TypeDecl>()) { | ||||||
10608 | if (getLangOpts().CPlusPlus11) { | ||||||
10609 | // Convert 'using X::Y;' to 'using Y = X::Y;'. | ||||||
10610 | Diag(SS.getBeginLoc(), diag::note_using_decl_class_member_workaround) | ||||||
10611 | << 0 // alias declaration | ||||||
10612 | << FixItHint::CreateInsertion(SS.getBeginLoc(), | ||||||
10613 | NameInfo.getName().getAsString() + | ||||||
10614 | " = "); | ||||||
10615 | } else { | ||||||
10616 | // Convert 'using X::Y;' to 'typedef X::Y Y;'. | ||||||
10617 | SourceLocation InsertLoc = getLocForEndOfToken(NameInfo.getEndLoc()); | ||||||
10618 | Diag(InsertLoc, diag::note_using_decl_class_member_workaround) | ||||||
10619 | << 1 // typedef declaration | ||||||
10620 | << FixItHint::CreateReplacement(UsingLoc, "typedef") | ||||||
10621 | << FixItHint::CreateInsertion( | ||||||
10622 | InsertLoc, " " + NameInfo.getName().getAsString()); | ||||||
10623 | } | ||||||
10624 | } else if (R.getAsSingle<VarDecl>()) { | ||||||
10625 | // Don't provide a fixit outside C++11 mode; we don't want to suggest | ||||||
10626 | // repeating the type of the static data member here. | ||||||
10627 | FixItHint FixIt; | ||||||
10628 | if (getLangOpts().CPlusPlus11) { | ||||||
10629 | // Convert 'using X::Y;' to 'auto &Y = X::Y;'. | ||||||
10630 | FixIt = FixItHint::CreateReplacement( | ||||||
10631 | UsingLoc, "auto &" + NameInfo.getName().getAsString() + " = "); | ||||||
10632 | } | ||||||
10633 | |||||||
10634 | Diag(UsingLoc, diag::note_using_decl_class_member_workaround) | ||||||
10635 | << 2 // reference declaration | ||||||
10636 | << FixIt; | ||||||
10637 | } else if (R.getAsSingle<EnumConstantDecl>()) { | ||||||
10638 | // Don't provide a fixit outside C++11 mode; we don't want to suggest | ||||||
10639 | // repeating the type of the enumeration here, and we can't do so if | ||||||
10640 | // the type is anonymous. | ||||||
10641 | FixItHint FixIt; | ||||||
10642 | if (getLangOpts().CPlusPlus11) { | ||||||
10643 | // Convert 'using X::Y;' to 'auto &Y = X::Y;'. | ||||||
10644 | FixIt = FixItHint::CreateReplacement( | ||||||
10645 | UsingLoc, | ||||||
10646 | "constexpr auto " + NameInfo.getName().getAsString() + " = "); | ||||||
10647 | } | ||||||
10648 | |||||||
10649 | Diag(UsingLoc, diag::note_using_decl_class_member_workaround) | ||||||
10650 | << (getLangOpts().CPlusPlus11 ? 4 : 3) // const[expr] variable | ||||||
10651 | << FixIt; | ||||||
10652 | } | ||||||
10653 | return true; | ||||||
10654 | } | ||||||
10655 | |||||||
10656 | // Otherwise, this might be valid. | ||||||
10657 | return false; | ||||||
10658 | } | ||||||
10659 | |||||||
10660 | // The current scope is a record. | ||||||
10661 | |||||||
10662 | // If the named context is dependent, we can't decide much. | ||||||
10663 | if (!NamedContext) { | ||||||
10664 | // FIXME: in C++0x, we can diagnose if we can prove that the | ||||||
10665 | // nested-name-specifier does not refer to a base class, which is | ||||||
10666 | // still possible in some cases. | ||||||
10667 | |||||||
10668 | // Otherwise we have to conservatively report that things might be | ||||||
10669 | // okay. | ||||||
10670 | return false; | ||||||
10671 | } | ||||||
10672 | |||||||
10673 | if (!NamedContext->isRecord()) { | ||||||
10674 | // Ideally this would point at the last name in the specifier, | ||||||
10675 | // but we don't have that level of source info. | ||||||
10676 | Diag(SS.getRange().getBegin(), | ||||||
10677 | diag::err_using_decl_nested_name_specifier_is_not_class) | ||||||
10678 | << SS.getScopeRep() << SS.getRange(); | ||||||
10679 | return true; | ||||||
10680 | } | ||||||
10681 | |||||||
10682 | if (!NamedContext->isDependentContext() && | ||||||
10683 | RequireCompleteDeclContext(const_cast<CXXScopeSpec&>(SS), NamedContext)) | ||||||
10684 | return true; | ||||||
10685 | |||||||
10686 | if (getLangOpts().CPlusPlus11) { | ||||||
10687 | // C++11 [namespace.udecl]p3: | ||||||
10688 | // In a using-declaration used as a member-declaration, the | ||||||
10689 | // nested-name-specifier shall name a base class of the class | ||||||
10690 | // being defined. | ||||||
10691 | |||||||
10692 | if (cast<CXXRecordDecl>(CurContext)->isProvablyNotDerivedFrom( | ||||||
10693 | cast<CXXRecordDecl>(NamedContext))) { | ||||||
10694 | if (CurContext == NamedContext) { | ||||||
10695 | Diag(NameLoc, | ||||||
10696 | diag::err_using_decl_nested_name_specifier_is_current_class) | ||||||
10697 | << SS.getRange(); | ||||||
10698 | return true; | ||||||
10699 | } | ||||||
10700 | |||||||
10701 | if (!cast<CXXRecordDecl>(NamedContext)->isInvalidDecl()) { | ||||||
10702 | Diag(SS.getRange().getBegin(), | ||||||
10703 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||||
10704 | << SS.getScopeRep() | ||||||
10705 | << cast<CXXRecordDecl>(CurContext) | ||||||
10706 | << SS.getRange(); | ||||||
10707 | } | ||||||
10708 | return true; | ||||||
10709 | } | ||||||
10710 | |||||||
10711 | return false; | ||||||
10712 | } | ||||||
10713 | |||||||
10714 | // C++03 [namespace.udecl]p4: | ||||||
10715 | // A using-declaration used as a member-declaration shall refer | ||||||
10716 | // to a member of a base class of the class being defined [etc.]. | ||||||
10717 | |||||||
10718 | // Salient point: SS doesn't have to name a base class as long as | ||||||
10719 | // lookup only finds members from base classes. Therefore we can | ||||||
10720 | // diagnose here only if we can prove that that can't happen, | ||||||
10721 | // i.e. if the class hierarchies provably don't intersect. | ||||||
10722 | |||||||
10723 | // TODO: it would be nice if "definitely valid" results were cached | ||||||
10724 | // in the UsingDecl and UsingShadowDecl so that these checks didn't | ||||||
10725 | // need to be repeated. | ||||||
10726 | |||||||
10727 | llvm::SmallPtrSet<const CXXRecordDecl *, 4> Bases; | ||||||
10728 | auto Collect = [&Bases](const CXXRecordDecl *Base) { | ||||||
10729 | Bases.insert(Base); | ||||||
10730 | return true; | ||||||
10731 | }; | ||||||
10732 | |||||||
10733 | // Collect all bases. Return false if we find a dependent base. | ||||||
10734 | if (!cast<CXXRecordDecl>(CurContext)->forallBases(Collect)) | ||||||
10735 | return false; | ||||||
10736 | |||||||
10737 | // Returns true if the base is dependent or is one of the accumulated base | ||||||
10738 | // classes. | ||||||
10739 | auto IsNotBase = [&Bases](const CXXRecordDecl *Base) { | ||||||
10740 | return !Bases.count(Base); | ||||||
10741 | }; | ||||||
10742 | |||||||
10743 | // Return false if the class has a dependent base or if it or one | ||||||
10744 | // of its bases is present in the base set of the current context. | ||||||
10745 | if (Bases.count(cast<CXXRecordDecl>(NamedContext)) || | ||||||
10746 | !cast<CXXRecordDecl>(NamedContext)->forallBases(IsNotBase)) | ||||||
10747 | return false; | ||||||
10748 | |||||||
10749 | Diag(SS.getRange().getBegin(), | ||||||
10750 | diag::err_using_decl_nested_name_specifier_is_not_base_class) | ||||||
10751 | << SS.getScopeRep() | ||||||
10752 | << cast<CXXRecordDecl>(CurContext) | ||||||
10753 | << SS.getRange(); | ||||||
10754 | |||||||
10755 | return true; | ||||||
10756 | } | ||||||
10757 | |||||||
10758 | Decl *Sema::ActOnAliasDeclaration(Scope *S, AccessSpecifier AS, | ||||||
10759 | MultiTemplateParamsArg TemplateParamLists, | ||||||
10760 | SourceLocation UsingLoc, UnqualifiedId &Name, | ||||||
10761 | const ParsedAttributesView &AttrList, | ||||||
10762 | TypeResult Type, Decl *DeclFromDeclSpec) { | ||||||
10763 | // Skip up to the relevant declaration scope. | ||||||
10764 | while (S->isTemplateParamScope()) | ||||||
10765 | S = S->getParent(); | ||||||
10766 | assert((S->getFlags() & Scope::DeclScope) &&(((S->getFlags() & Scope::DeclScope) && "got alias-declaration outside of declaration scope" ) ? static_cast<void> (0) : __assert_fail ("(S->getFlags() & Scope::DeclScope) && \"got alias-declaration outside of declaration scope\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10767, __PRETTY_FUNCTION__)) | ||||||
10767 | "got alias-declaration outside of declaration scope")(((S->getFlags() & Scope::DeclScope) && "got alias-declaration outside of declaration scope" ) ? static_cast<void> (0) : __assert_fail ("(S->getFlags() & Scope::DeclScope) && \"got alias-declaration outside of declaration scope\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10767, __PRETTY_FUNCTION__)); | ||||||
10768 | |||||||
10769 | if (Type.isInvalid()) | ||||||
10770 | return nullptr; | ||||||
10771 | |||||||
10772 | bool Invalid = false; | ||||||
10773 | DeclarationNameInfo NameInfo = GetNameFromUnqualifiedId(Name); | ||||||
10774 | TypeSourceInfo *TInfo = nullptr; | ||||||
10775 | GetTypeFromParser(Type.get(), &TInfo); | ||||||
10776 | |||||||
10777 | if (DiagnoseClassNameShadow(CurContext, NameInfo)) | ||||||
10778 | return nullptr; | ||||||
10779 | |||||||
10780 | if (DiagnoseUnexpandedParameterPack(Name.StartLocation, TInfo, | ||||||
10781 | UPPC_DeclarationType)) { | ||||||
10782 | Invalid = true; | ||||||
10783 | TInfo = Context.getTrivialTypeSourceInfo(Context.IntTy, | ||||||
10784 | TInfo->getTypeLoc().getBeginLoc()); | ||||||
10785 | } | ||||||
10786 | |||||||
10787 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||
10788 | TemplateParamLists.size() | ||||||
10789 | ? forRedeclarationInCurContext() | ||||||
10790 | : ForVisibleRedeclaration); | ||||||
10791 | LookupName(Previous, S); | ||||||
10792 | |||||||
10793 | // Warn about shadowing the name of a template parameter. | ||||||
10794 | if (Previous.isSingleResult() && | ||||||
10795 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||
10796 | DiagnoseTemplateParameterShadow(Name.StartLocation,Previous.getFoundDecl()); | ||||||
10797 | Previous.clear(); | ||||||
10798 | } | ||||||
10799 | |||||||
10800 | assert(Name.Kind == UnqualifiedIdKind::IK_Identifier &&((Name.Kind == UnqualifiedIdKind::IK_Identifier && "name in alias declaration must be an identifier" ) ? static_cast<void> (0) : __assert_fail ("Name.Kind == UnqualifiedIdKind::IK_Identifier && \"name in alias declaration must be an identifier\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10801, __PRETTY_FUNCTION__)) | ||||||
10801 | "name in alias declaration must be an identifier")((Name.Kind == UnqualifiedIdKind::IK_Identifier && "name in alias declaration must be an identifier" ) ? static_cast<void> (0) : __assert_fail ("Name.Kind == UnqualifiedIdKind::IK_Identifier && \"name in alias declaration must be an identifier\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10801, __PRETTY_FUNCTION__)); | ||||||
10802 | TypeAliasDecl *NewTD = TypeAliasDecl::Create(Context, CurContext, UsingLoc, | ||||||
10803 | Name.StartLocation, | ||||||
10804 | Name.Identifier, TInfo); | ||||||
10805 | |||||||
10806 | NewTD->setAccess(AS); | ||||||
10807 | |||||||
10808 | if (Invalid) | ||||||
10809 | NewTD->setInvalidDecl(); | ||||||
10810 | |||||||
10811 | ProcessDeclAttributeList(S, NewTD, AttrList); | ||||||
10812 | AddPragmaAttributes(S, NewTD); | ||||||
10813 | |||||||
10814 | CheckTypedefForVariablyModifiedType(S, NewTD); | ||||||
10815 | Invalid |= NewTD->isInvalidDecl(); | ||||||
10816 | |||||||
10817 | bool Redeclaration = false; | ||||||
10818 | |||||||
10819 | NamedDecl *NewND; | ||||||
10820 | if (TemplateParamLists.size()) { | ||||||
10821 | TypeAliasTemplateDecl *OldDecl = nullptr; | ||||||
10822 | TemplateParameterList *OldTemplateParams = nullptr; | ||||||
10823 | |||||||
10824 | if (TemplateParamLists.size() != 1) { | ||||||
10825 | Diag(UsingLoc, diag::err_alias_template_extra_headers) | ||||||
10826 | << SourceRange(TemplateParamLists[1]->getTemplateLoc(), | ||||||
10827 | TemplateParamLists[TemplateParamLists.size()-1]->getRAngleLoc()); | ||||||
10828 | } | ||||||
10829 | TemplateParameterList *TemplateParams = TemplateParamLists[0]; | ||||||
10830 | |||||||
10831 | // Check that we can declare a template here. | ||||||
10832 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||||
10833 | return nullptr; | ||||||
10834 | |||||||
10835 | // Only consider previous declarations in the same scope. | ||||||
10836 | FilterLookupForScope(Previous, CurContext, S, /*ConsiderLinkage*/false, | ||||||
10837 | /*ExplicitInstantiationOrSpecialization*/false); | ||||||
10838 | if (!Previous.empty()) { | ||||||
10839 | Redeclaration = true; | ||||||
10840 | |||||||
10841 | OldDecl = Previous.getAsSingle<TypeAliasTemplateDecl>(); | ||||||
10842 | if (!OldDecl && !Invalid) { | ||||||
10843 | Diag(UsingLoc, diag::err_redefinition_different_kind) | ||||||
10844 | << Name.Identifier; | ||||||
10845 | |||||||
10846 | NamedDecl *OldD = Previous.getRepresentativeDecl(); | ||||||
10847 | if (OldD->getLocation().isValid()) | ||||||
10848 | Diag(OldD->getLocation(), diag::note_previous_definition); | ||||||
10849 | |||||||
10850 | Invalid = true; | ||||||
10851 | } | ||||||
10852 | |||||||
10853 | if (!Invalid && OldDecl && !OldDecl->isInvalidDecl()) { | ||||||
10854 | if (TemplateParameterListsAreEqual(TemplateParams, | ||||||
10855 | OldDecl->getTemplateParameters(), | ||||||
10856 | /*Complain=*/true, | ||||||
10857 | TPL_TemplateMatch)) | ||||||
10858 | OldTemplateParams = | ||||||
10859 | OldDecl->getMostRecentDecl()->getTemplateParameters(); | ||||||
10860 | else | ||||||
10861 | Invalid = true; | ||||||
10862 | |||||||
10863 | TypeAliasDecl *OldTD = OldDecl->getTemplatedDecl(); | ||||||
10864 | if (!Invalid && | ||||||
10865 | !Context.hasSameType(OldTD->getUnderlyingType(), | ||||||
10866 | NewTD->getUnderlyingType())) { | ||||||
10867 | // FIXME: The C++0x standard does not clearly say this is ill-formed, | ||||||
10868 | // but we can't reasonably accept it. | ||||||
10869 | Diag(NewTD->getLocation(), diag::err_redefinition_different_typedef) | ||||||
10870 | << 2 << NewTD->getUnderlyingType() << OldTD->getUnderlyingType(); | ||||||
10871 | if (OldTD->getLocation().isValid()) | ||||||
10872 | Diag(OldTD->getLocation(), diag::note_previous_definition); | ||||||
10873 | Invalid = true; | ||||||
10874 | } | ||||||
10875 | } | ||||||
10876 | } | ||||||
10877 | |||||||
10878 | // Merge any previous default template arguments into our parameters, | ||||||
10879 | // and check the parameter list. | ||||||
10880 | if (CheckTemplateParameterList(TemplateParams, OldTemplateParams, | ||||||
10881 | TPC_TypeAliasTemplate)) | ||||||
10882 | return nullptr; | ||||||
10883 | |||||||
10884 | TypeAliasTemplateDecl *NewDecl = | ||||||
10885 | TypeAliasTemplateDecl::Create(Context, CurContext, UsingLoc, | ||||||
10886 | Name.Identifier, TemplateParams, | ||||||
10887 | NewTD); | ||||||
10888 | NewTD->setDescribedAliasTemplate(NewDecl); | ||||||
10889 | |||||||
10890 | NewDecl->setAccess(AS); | ||||||
10891 | |||||||
10892 | if (Invalid) | ||||||
10893 | NewDecl->setInvalidDecl(); | ||||||
10894 | else if (OldDecl) { | ||||||
10895 | NewDecl->setPreviousDecl(OldDecl); | ||||||
10896 | CheckRedeclarationModuleOwnership(NewDecl, OldDecl); | ||||||
10897 | } | ||||||
10898 | |||||||
10899 | NewND = NewDecl; | ||||||
10900 | } else { | ||||||
10901 | if (auto *TD = dyn_cast_or_null<TagDecl>(DeclFromDeclSpec)) { | ||||||
10902 | setTagNameForLinkagePurposes(TD, NewTD); | ||||||
10903 | handleTagNumbering(TD, S); | ||||||
10904 | } | ||||||
10905 | ActOnTypedefNameDecl(S, CurContext, NewTD, Previous, Redeclaration); | ||||||
10906 | NewND = NewTD; | ||||||
10907 | } | ||||||
10908 | |||||||
10909 | PushOnScopeChains(NewND, S); | ||||||
10910 | ActOnDocumentableDecl(NewND); | ||||||
10911 | return NewND; | ||||||
10912 | } | ||||||
10913 | |||||||
10914 | Decl *Sema::ActOnNamespaceAliasDef(Scope *S, SourceLocation NamespaceLoc, | ||||||
10915 | SourceLocation AliasLoc, | ||||||
10916 | IdentifierInfo *Alias, CXXScopeSpec &SS, | ||||||
10917 | SourceLocation IdentLoc, | ||||||
10918 | IdentifierInfo *Ident) { | ||||||
10919 | |||||||
10920 | // Lookup the namespace name. | ||||||
10921 | LookupResult R(*this, Ident, IdentLoc, LookupNamespaceName); | ||||||
10922 | LookupParsedName(R, S, &SS); | ||||||
10923 | |||||||
10924 | if (R.isAmbiguous()) | ||||||
10925 | return nullptr; | ||||||
10926 | |||||||
10927 | if (R.empty()) { | ||||||
10928 | if (!TryNamespaceTypoCorrection(*this, R, S, SS, IdentLoc, Ident)) { | ||||||
10929 | Diag(IdentLoc, diag::err_expected_namespace_name) << SS.getRange(); | ||||||
10930 | return nullptr; | ||||||
10931 | } | ||||||
10932 | } | ||||||
10933 | assert(!R.isAmbiguous() && !R.empty())((!R.isAmbiguous() && !R.empty()) ? static_cast<void > (0) : __assert_fail ("!R.isAmbiguous() && !R.empty()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 10933, __PRETTY_FUNCTION__)); | ||||||
10934 | NamedDecl *ND = R.getRepresentativeDecl(); | ||||||
10935 | |||||||
10936 | // Check if we have a previous declaration with the same name. | ||||||
10937 | LookupResult PrevR(*this, Alias, AliasLoc, LookupOrdinaryName, | ||||||
10938 | ForVisibleRedeclaration); | ||||||
10939 | LookupName(PrevR, S); | ||||||
10940 | |||||||
10941 | // Check we're not shadowing a template parameter. | ||||||
10942 | if (PrevR.isSingleResult() && PrevR.getFoundDecl()->isTemplateParameter()) { | ||||||
10943 | DiagnoseTemplateParameterShadow(AliasLoc, PrevR.getFoundDecl()); | ||||||
10944 | PrevR.clear(); | ||||||
10945 | } | ||||||
10946 | |||||||
10947 | // Filter out any other lookup result from an enclosing scope. | ||||||
10948 | FilterLookupForScope(PrevR, CurContext, S, /*ConsiderLinkage*/false, | ||||||
10949 | /*AllowInlineNamespace*/false); | ||||||
10950 | |||||||
10951 | // Find the previous declaration and check that we can redeclare it. | ||||||
10952 | NamespaceAliasDecl *Prev = nullptr; | ||||||
10953 | if (PrevR.isSingleResult()) { | ||||||
10954 | NamedDecl *PrevDecl = PrevR.getRepresentativeDecl(); | ||||||
10955 | if (NamespaceAliasDecl *AD = dyn_cast<NamespaceAliasDecl>(PrevDecl)) { | ||||||
10956 | // We already have an alias with the same name that points to the same | ||||||
10957 | // namespace; check that it matches. | ||||||
10958 | if (AD->getNamespace()->Equals(getNamespaceDecl(ND))) { | ||||||
10959 | Prev = AD; | ||||||
10960 | } else if (isVisible(PrevDecl)) { | ||||||
10961 | Diag(AliasLoc, diag::err_redefinition_different_namespace_alias) | ||||||
10962 | << Alias; | ||||||
10963 | Diag(AD->getLocation(), diag::note_previous_namespace_alias) | ||||||
10964 | << AD->getNamespace(); | ||||||
10965 | return nullptr; | ||||||
10966 | } | ||||||
10967 | } else if (isVisible(PrevDecl)) { | ||||||
10968 | unsigned DiagID = isa<NamespaceDecl>(PrevDecl->getUnderlyingDecl()) | ||||||
10969 | ? diag::err_redefinition | ||||||
10970 | : diag::err_redefinition_different_kind; | ||||||
10971 | Diag(AliasLoc, DiagID) << Alias; | ||||||
10972 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||||
10973 | return nullptr; | ||||||
10974 | } | ||||||
10975 | } | ||||||
10976 | |||||||
10977 | // The use of a nested name specifier may trigger deprecation warnings. | ||||||
10978 | DiagnoseUseOfDecl(ND, IdentLoc); | ||||||
10979 | |||||||
10980 | NamespaceAliasDecl *AliasDecl = | ||||||
10981 | NamespaceAliasDecl::Create(Context, CurContext, NamespaceLoc, AliasLoc, | ||||||
10982 | Alias, SS.getWithLocInContext(Context), | ||||||
10983 | IdentLoc, ND); | ||||||
10984 | if (Prev) | ||||||
10985 | AliasDecl->setPreviousDecl(Prev); | ||||||
10986 | |||||||
10987 | PushOnScopeChains(AliasDecl, S); | ||||||
10988 | return AliasDecl; | ||||||
10989 | } | ||||||
10990 | |||||||
10991 | namespace { | ||||||
10992 | struct SpecialMemberExceptionSpecInfo | ||||||
10993 | : SpecialMemberVisitor<SpecialMemberExceptionSpecInfo> { | ||||||
10994 | SourceLocation Loc; | ||||||
10995 | Sema::ImplicitExceptionSpecification ExceptSpec; | ||||||
10996 | |||||||
10997 | SpecialMemberExceptionSpecInfo(Sema &S, CXXMethodDecl *MD, | ||||||
10998 | Sema::CXXSpecialMember CSM, | ||||||
10999 | Sema::InheritedConstructorInfo *ICI, | ||||||
11000 | SourceLocation Loc) | ||||||
11001 | : SpecialMemberVisitor(S, MD, CSM, ICI), Loc(Loc), ExceptSpec(S) {} | ||||||
11002 | |||||||
11003 | bool visitBase(CXXBaseSpecifier *Base); | ||||||
11004 | bool visitField(FieldDecl *FD); | ||||||
11005 | |||||||
11006 | void visitClassSubobject(CXXRecordDecl *Class, Subobject Subobj, | ||||||
11007 | unsigned Quals); | ||||||
11008 | |||||||
11009 | void visitSubobjectCall(Subobject Subobj, | ||||||
11010 | Sema::SpecialMemberOverloadResult SMOR); | ||||||
11011 | }; | ||||||
11012 | } | ||||||
11013 | |||||||
11014 | bool SpecialMemberExceptionSpecInfo::visitBase(CXXBaseSpecifier *Base) { | ||||||
11015 | auto *RT = Base->getType()->getAs<RecordType>(); | ||||||
11016 | if (!RT) | ||||||
11017 | return false; | ||||||
11018 | |||||||
11019 | auto *BaseClass = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
11020 | Sema::SpecialMemberOverloadResult SMOR = lookupInheritedCtor(BaseClass); | ||||||
11021 | if (auto *BaseCtor = SMOR.getMethod()) { | ||||||
11022 | visitSubobjectCall(Base, BaseCtor); | ||||||
11023 | return false; | ||||||
11024 | } | ||||||
11025 | |||||||
11026 | visitClassSubobject(BaseClass, Base, 0); | ||||||
11027 | return false; | ||||||
11028 | } | ||||||
11029 | |||||||
11030 | bool SpecialMemberExceptionSpecInfo::visitField(FieldDecl *FD) { | ||||||
11031 | if (CSM == Sema::CXXDefaultConstructor && FD->hasInClassInitializer()) { | ||||||
11032 | Expr *E = FD->getInClassInitializer(); | ||||||
11033 | if (!E) | ||||||
11034 | // FIXME: It's a little wasteful to build and throw away a | ||||||
11035 | // CXXDefaultInitExpr here. | ||||||
11036 | // FIXME: We should have a single context note pointing at Loc, and | ||||||
11037 | // this location should be MD->getLocation() instead, since that's | ||||||
11038 | // the location where we actually use the default init expression. | ||||||
11039 | E = S.BuildCXXDefaultInitExpr(Loc, FD).get(); | ||||||
11040 | if (E) | ||||||
11041 | ExceptSpec.CalledExpr(E); | ||||||
11042 | } else if (auto *RT = S.Context.getBaseElementType(FD->getType()) | ||||||
11043 | ->getAs<RecordType>()) { | ||||||
11044 | visitClassSubobject(cast<CXXRecordDecl>(RT->getDecl()), FD, | ||||||
11045 | FD->getType().getCVRQualifiers()); | ||||||
11046 | } | ||||||
11047 | return false; | ||||||
11048 | } | ||||||
11049 | |||||||
11050 | void SpecialMemberExceptionSpecInfo::visitClassSubobject(CXXRecordDecl *Class, | ||||||
11051 | Subobject Subobj, | ||||||
11052 | unsigned Quals) { | ||||||
11053 | FieldDecl *Field = Subobj.dyn_cast<FieldDecl*>(); | ||||||
11054 | bool IsMutable = Field && Field->isMutable(); | ||||||
11055 | visitSubobjectCall(Subobj, lookupIn(Class, Quals, IsMutable)); | ||||||
11056 | } | ||||||
11057 | |||||||
11058 | void SpecialMemberExceptionSpecInfo::visitSubobjectCall( | ||||||
11059 | Subobject Subobj, Sema::SpecialMemberOverloadResult SMOR) { | ||||||
11060 | // Note, if lookup fails, it doesn't matter what exception specification we | ||||||
11061 | // choose because the special member will be deleted. | ||||||
11062 | if (CXXMethodDecl *MD = SMOR.getMethod()) | ||||||
11063 | ExceptSpec.CalledDecl(getSubobjectLoc(Subobj), MD); | ||||||
11064 | } | ||||||
11065 | |||||||
11066 | namespace { | ||||||
11067 | /// RAII object to register a special member as being currently declared. | ||||||
11068 | struct ComputingExceptionSpec { | ||||||
11069 | Sema &S; | ||||||
11070 | |||||||
11071 | ComputingExceptionSpec(Sema &S, CXXMethodDecl *MD, SourceLocation Loc) | ||||||
11072 | : S(S) { | ||||||
11073 | Sema::CodeSynthesisContext Ctx; | ||||||
11074 | Ctx.Kind = Sema::CodeSynthesisContext::ExceptionSpecEvaluation; | ||||||
11075 | Ctx.PointOfInstantiation = Loc; | ||||||
11076 | Ctx.Entity = MD; | ||||||
11077 | S.pushCodeSynthesisContext(Ctx); | ||||||
11078 | } | ||||||
11079 | ~ComputingExceptionSpec() { | ||||||
11080 | S.popCodeSynthesisContext(); | ||||||
11081 | } | ||||||
11082 | }; | ||||||
11083 | } | ||||||
11084 | |||||||
11085 | bool Sema::tryResolveExplicitSpecifier(ExplicitSpecifier &ExplicitSpec) { | ||||||
11086 | llvm::APSInt Result; | ||||||
11087 | ExprResult Converted = CheckConvertedConstantExpression( | ||||||
11088 | ExplicitSpec.getExpr(), Context.BoolTy, Result, CCEK_ExplicitBool); | ||||||
11089 | ExplicitSpec.setExpr(Converted.get()); | ||||||
11090 | if (Converted.isUsable() && !Converted.get()->isValueDependent()) { | ||||||
11091 | ExplicitSpec.setKind(Result.getBoolValue() | ||||||
11092 | ? ExplicitSpecKind::ResolvedTrue | ||||||
11093 | : ExplicitSpecKind::ResolvedFalse); | ||||||
11094 | return true; | ||||||
11095 | } | ||||||
11096 | ExplicitSpec.setKind(ExplicitSpecKind::Unresolved); | ||||||
11097 | return false; | ||||||
11098 | } | ||||||
11099 | |||||||
11100 | ExplicitSpecifier Sema::ActOnExplicitBoolSpecifier(Expr *ExplicitExpr) { | ||||||
11101 | ExplicitSpecifier ES(ExplicitExpr, ExplicitSpecKind::Unresolved); | ||||||
11102 | if (!ExplicitExpr->isTypeDependent()) | ||||||
11103 | tryResolveExplicitSpecifier(ES); | ||||||
11104 | return ES; | ||||||
11105 | } | ||||||
11106 | |||||||
11107 | static Sema::ImplicitExceptionSpecification | ||||||
11108 | ComputeDefaultedSpecialMemberExceptionSpec( | ||||||
11109 | Sema &S, SourceLocation Loc, CXXMethodDecl *MD, Sema::CXXSpecialMember CSM, | ||||||
11110 | Sema::InheritedConstructorInfo *ICI) { | ||||||
11111 | ComputingExceptionSpec CES(S, MD, Loc); | ||||||
11112 | |||||||
11113 | CXXRecordDecl *ClassDecl = MD->getParent(); | ||||||
11114 | |||||||
11115 | // C++ [except.spec]p14: | ||||||
11116 | // An implicitly declared special member function (Clause 12) shall have an | ||||||
11117 | // exception-specification. [...] | ||||||
11118 | SpecialMemberExceptionSpecInfo Info(S, MD, CSM, ICI, MD->getLocation()); | ||||||
11119 | if (ClassDecl->isInvalidDecl()) | ||||||
11120 | return Info.ExceptSpec; | ||||||
11121 | |||||||
11122 | // FIXME: If this diagnostic fires, we're probably missing a check for | ||||||
11123 | // attempting to resolve an exception specification before it's known | ||||||
11124 | // at a higher level. | ||||||
11125 | if (S.RequireCompleteType(MD->getLocation(), | ||||||
11126 | S.Context.getRecordType(ClassDecl), | ||||||
11127 | diag::err_exception_spec_incomplete_type)) | ||||||
11128 | return Info.ExceptSpec; | ||||||
11129 | |||||||
11130 | // C++1z [except.spec]p7: | ||||||
11131 | // [Look for exceptions thrown by] a constructor selected [...] to | ||||||
11132 | // initialize a potentially constructed subobject, | ||||||
11133 | // C++1z [except.spec]p8: | ||||||
11134 | // The exception specification for an implicitly-declared destructor, or a | ||||||
11135 | // destructor without a noexcept-specifier, is potentially-throwing if and | ||||||
11136 | // only if any of the destructors for any of its potentially constructed | ||||||
11137 | // subojects is potentially throwing. | ||||||
11138 | // FIXME: We respect the first rule but ignore the "potentially constructed" | ||||||
11139 | // in the second rule to resolve a core issue (no number yet) that would have | ||||||
11140 | // us reject: | ||||||
11141 | // struct A { virtual void f() = 0; virtual ~A() noexcept(false) = 0; }; | ||||||
11142 | // struct B : A {}; | ||||||
11143 | // struct C : B { void f(); }; | ||||||
11144 | // ... due to giving B::~B() a non-throwing exception specification. | ||||||
11145 | Info.visit(Info.IsConstructor ? Info.VisitPotentiallyConstructedBases | ||||||
11146 | : Info.VisitAllBases); | ||||||
11147 | |||||||
11148 | return Info.ExceptSpec; | ||||||
11149 | } | ||||||
11150 | |||||||
11151 | namespace { | ||||||
11152 | /// RAII object to register a special member as being currently declared. | ||||||
11153 | struct DeclaringSpecialMember { | ||||||
11154 | Sema &S; | ||||||
11155 | Sema::SpecialMemberDecl D; | ||||||
11156 | Sema::ContextRAII SavedContext; | ||||||
11157 | bool WasAlreadyBeingDeclared; | ||||||
11158 | |||||||
11159 | DeclaringSpecialMember(Sema &S, CXXRecordDecl *RD, Sema::CXXSpecialMember CSM) | ||||||
11160 | : S(S), D(RD, CSM), SavedContext(S, RD) { | ||||||
11161 | WasAlreadyBeingDeclared = !S.SpecialMembersBeingDeclared.insert(D).second; | ||||||
11162 | if (WasAlreadyBeingDeclared) | ||||||
11163 | // This almost never happens, but if it does, ensure that our cache | ||||||
11164 | // doesn't contain a stale result. | ||||||
11165 | S.SpecialMemberCache.clear(); | ||||||
11166 | else { | ||||||
11167 | // Register a note to be produced if we encounter an error while | ||||||
11168 | // declaring the special member. | ||||||
11169 | Sema::CodeSynthesisContext Ctx; | ||||||
11170 | Ctx.Kind = Sema::CodeSynthesisContext::DeclaringSpecialMember; | ||||||
11171 | // FIXME: We don't have a location to use here. Using the class's | ||||||
11172 | // location maintains the fiction that we declare all special members | ||||||
11173 | // with the class, but (1) it's not clear that lying about that helps our | ||||||
11174 | // users understand what's going on, and (2) there may be outer contexts | ||||||
11175 | // on the stack (some of which are relevant) and printing them exposes | ||||||
11176 | // our lies. | ||||||
11177 | Ctx.PointOfInstantiation = RD->getLocation(); | ||||||
11178 | Ctx.Entity = RD; | ||||||
11179 | Ctx.SpecialMember = CSM; | ||||||
11180 | S.pushCodeSynthesisContext(Ctx); | ||||||
11181 | } | ||||||
11182 | } | ||||||
11183 | ~DeclaringSpecialMember() { | ||||||
11184 | if (!WasAlreadyBeingDeclared) { | ||||||
11185 | S.SpecialMembersBeingDeclared.erase(D); | ||||||
11186 | S.popCodeSynthesisContext(); | ||||||
11187 | } | ||||||
11188 | } | ||||||
11189 | |||||||
11190 | /// Are we already trying to declare this special member? | ||||||
11191 | bool isAlreadyBeingDeclared() const { | ||||||
11192 | return WasAlreadyBeingDeclared; | ||||||
11193 | } | ||||||
11194 | }; | ||||||
11195 | } | ||||||
11196 | |||||||
11197 | void Sema::CheckImplicitSpecialMemberDeclaration(Scope *S, FunctionDecl *FD) { | ||||||
11198 | // Look up any existing declarations, but don't trigger declaration of all | ||||||
11199 | // implicit special members with this name. | ||||||
11200 | DeclarationName Name = FD->getDeclName(); | ||||||
11201 | LookupResult R(*this, Name, SourceLocation(), LookupOrdinaryName, | ||||||
11202 | ForExternalRedeclaration); | ||||||
11203 | for (auto *D : FD->getParent()->lookup(Name)) | ||||||
11204 | if (auto *Acceptable = R.getAcceptableDecl(D)) | ||||||
11205 | R.addDecl(Acceptable); | ||||||
11206 | R.resolveKind(); | ||||||
11207 | R.suppressDiagnostics(); | ||||||
11208 | |||||||
11209 | CheckFunctionDeclaration(S, FD, R, /*IsMemberSpecialization*/false); | ||||||
11210 | } | ||||||
11211 | |||||||
11212 | void Sema::setupImplicitSpecialMemberType(CXXMethodDecl *SpecialMem, | ||||||
11213 | QualType ResultTy, | ||||||
11214 | ArrayRef<QualType> Args) { | ||||||
11215 | // Build an exception specification pointing back at this constructor. | ||||||
11216 | FunctionProtoType::ExtProtoInfo EPI = getImplicitMethodEPI(*this, SpecialMem); | ||||||
11217 | |||||||
11218 | if (getLangOpts().OpenCLCPlusPlus) { | ||||||
11219 | // OpenCL: Implicitly defaulted special member are of the generic address | ||||||
11220 | // space. | ||||||
11221 | EPI.TypeQuals.addAddressSpace(LangAS::opencl_generic); | ||||||
11222 | } | ||||||
11223 | |||||||
11224 | auto QT = Context.getFunctionType(ResultTy, Args, EPI); | ||||||
11225 | SpecialMem->setType(QT); | ||||||
11226 | } | ||||||
11227 | |||||||
11228 | CXXConstructorDecl *Sema::DeclareImplicitDefaultConstructor( | ||||||
11229 | CXXRecordDecl *ClassDecl) { | ||||||
11230 | // C++ [class.ctor]p5: | ||||||
11231 | // A default constructor for a class X is a constructor of class X | ||||||
11232 | // that can be called without an argument. If there is no | ||||||
11233 | // user-declared constructor for class X, a default constructor is | ||||||
11234 | // implicitly declared. An implicitly-declared default constructor | ||||||
11235 | // is an inline public member of its class. | ||||||
11236 | assert(ClassDecl->needsImplicitDefaultConstructor() &&((ClassDecl->needsImplicitDefaultConstructor() && "Should not build implicit default constructor!" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl->needsImplicitDefaultConstructor() && \"Should not build implicit default constructor!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11237, __PRETTY_FUNCTION__)) | ||||||
11237 | "Should not build implicit default constructor!")((ClassDecl->needsImplicitDefaultConstructor() && "Should not build implicit default constructor!" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl->needsImplicitDefaultConstructor() && \"Should not build implicit default constructor!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11237, __PRETTY_FUNCTION__)); | ||||||
11238 | |||||||
11239 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXDefaultConstructor); | ||||||
11240 | if (DSM.isAlreadyBeingDeclared()) | ||||||
11241 | return nullptr; | ||||||
11242 | |||||||
11243 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||
11244 | CXXDefaultConstructor, | ||||||
11245 | false); | ||||||
11246 | |||||||
11247 | // Create the actual constructor declaration. | ||||||
11248 | CanQualType ClassType | ||||||
11249 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||||
11250 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||
11251 | DeclarationName Name | ||||||
11252 | = Context.DeclarationNames.getCXXConstructorName(ClassType); | ||||||
11253 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||
11254 | CXXConstructorDecl *DefaultCon = CXXConstructorDecl::Create( | ||||||
11255 | Context, ClassDecl, ClassLoc, NameInfo, /*Type*/ QualType(), | ||||||
11256 | /*TInfo=*/nullptr, ExplicitSpecifier(), | ||||||
11257 | /*isInline=*/true, /*isImplicitlyDeclared=*/true, | ||||||
11258 | Constexpr ? CSK_constexpr : CSK_unspecified); | ||||||
11259 | DefaultCon->setAccess(AS_public); | ||||||
11260 | DefaultCon->setDefaulted(); | ||||||
11261 | |||||||
11262 | if (getLangOpts().CUDA) { | ||||||
11263 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXDefaultConstructor, | ||||||
11264 | DefaultCon, | ||||||
11265 | /* ConstRHS */ false, | ||||||
11266 | /* Diagnose */ false); | ||||||
11267 | } | ||||||
11268 | |||||||
11269 | setupImplicitSpecialMemberType(DefaultCon, Context.VoidTy, None); | ||||||
11270 | |||||||
11271 | // We don't need to use SpecialMemberIsTrivial here; triviality for default | ||||||
11272 | // constructors is easy to compute. | ||||||
11273 | DefaultCon->setTrivial(ClassDecl->hasTrivialDefaultConstructor()); | ||||||
11274 | |||||||
11275 | // Note that we have declared this constructor. | ||||||
11276 | ++getASTContext().NumImplicitDefaultConstructorsDeclared; | ||||||
11277 | |||||||
11278 | Scope *S = getScopeForContext(ClassDecl); | ||||||
11279 | CheckImplicitSpecialMemberDeclaration(S, DefaultCon); | ||||||
11280 | |||||||
11281 | if (ShouldDeleteSpecialMember(DefaultCon, CXXDefaultConstructor)) | ||||||
11282 | SetDeclDeleted(DefaultCon, ClassLoc); | ||||||
11283 | |||||||
11284 | if (S) | ||||||
11285 | PushOnScopeChains(DefaultCon, S, false); | ||||||
11286 | ClassDecl->addDecl(DefaultCon); | ||||||
11287 | |||||||
11288 | return DefaultCon; | ||||||
11289 | } | ||||||
11290 | |||||||
11291 | void Sema::DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, | ||||||
11292 | CXXConstructorDecl *Constructor) { | ||||||
11293 | assert((Constructor->isDefaulted() && Constructor->isDefaultConstructor() &&(((Constructor->isDefaulted() && Constructor->isDefaultConstructor () && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && "DefineImplicitDefaultConstructor - call it for implicit default ctor" ) ? static_cast<void> (0) : __assert_fail ("(Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && \"DefineImplicitDefaultConstructor - call it for implicit default ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11296, __PRETTY_FUNCTION__)) | ||||||
11294 | !Constructor->doesThisDeclarationHaveABody() &&(((Constructor->isDefaulted() && Constructor->isDefaultConstructor () && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && "DefineImplicitDefaultConstructor - call it for implicit default ctor" ) ? static_cast<void> (0) : __assert_fail ("(Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && \"DefineImplicitDefaultConstructor - call it for implicit default ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11296, __PRETTY_FUNCTION__)) | ||||||
11295 | !Constructor->isDeleted()) &&(((Constructor->isDefaulted() && Constructor->isDefaultConstructor () && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && "DefineImplicitDefaultConstructor - call it for implicit default ctor" ) ? static_cast<void> (0) : __assert_fail ("(Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && \"DefineImplicitDefaultConstructor - call it for implicit default ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11296, __PRETTY_FUNCTION__)) | ||||||
11296 | "DefineImplicitDefaultConstructor - call it for implicit default ctor")(((Constructor->isDefaulted() && Constructor->isDefaultConstructor () && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && "DefineImplicitDefaultConstructor - call it for implicit default ctor" ) ? static_cast<void> (0) : __assert_fail ("(Constructor->isDefaulted() && Constructor->isDefaultConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()) && \"DefineImplicitDefaultConstructor - call it for implicit default ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11296, __PRETTY_FUNCTION__)); | ||||||
11297 | if (Constructor->willHaveBody() || Constructor->isInvalidDecl()) | ||||||
11298 | return; | ||||||
11299 | |||||||
11300 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||||
11301 | assert(ClassDecl && "DefineImplicitDefaultConstructor - invalid constructor")((ClassDecl && "DefineImplicitDefaultConstructor - invalid constructor" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl && \"DefineImplicitDefaultConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11301, __PRETTY_FUNCTION__)); | ||||||
11302 | |||||||
11303 | SynthesizedFunctionScope Scope(*this, Constructor); | ||||||
11304 | |||||||
11305 | // The exception specification is needed because we are defining the | ||||||
11306 | // function. | ||||||
11307 | ResolveExceptionSpec(CurrentLocation, | ||||||
11308 | Constructor->getType()->castAs<FunctionProtoType>()); | ||||||
11309 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||
11310 | |||||||
11311 | // Add a context note for diagnostics produced after this point. | ||||||
11312 | Scope.addContextNote(CurrentLocation); | ||||||
11313 | |||||||
11314 | if (SetCtorInitializers(Constructor, /*AnyErrors=*/false)) { | ||||||
11315 | Constructor->setInvalidDecl(); | ||||||
11316 | return; | ||||||
11317 | } | ||||||
11318 | |||||||
11319 | SourceLocation Loc = Constructor->getEndLoc().isValid() | ||||||
11320 | ? Constructor->getEndLoc() | ||||||
11321 | : Constructor->getLocation(); | ||||||
11322 | Constructor->setBody(new (Context) CompoundStmt(Loc)); | ||||||
11323 | Constructor->markUsed(Context); | ||||||
11324 | |||||||
11325 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
11326 | L->CompletedImplicitDefinition(Constructor); | ||||||
11327 | } | ||||||
11328 | |||||||
11329 | DiagnoseUninitializedFields(*this, Constructor); | ||||||
11330 | } | ||||||
11331 | |||||||
11332 | void Sema::ActOnFinishDelayedMemberInitializers(Decl *D) { | ||||||
11333 | // Perform any delayed checks on exception specifications. | ||||||
11334 | CheckDelayedMemberExceptionSpecs(); | ||||||
11335 | } | ||||||
11336 | |||||||
11337 | /// Find or create the fake constructor we synthesize to model constructing an | ||||||
11338 | /// object of a derived class via a constructor of a base class. | ||||||
11339 | CXXConstructorDecl * | ||||||
11340 | Sema::findInheritingConstructor(SourceLocation Loc, | ||||||
11341 | CXXConstructorDecl *BaseCtor, | ||||||
11342 | ConstructorUsingShadowDecl *Shadow) { | ||||||
11343 | CXXRecordDecl *Derived = Shadow->getParent(); | ||||||
11344 | SourceLocation UsingLoc = Shadow->getLocation(); | ||||||
11345 | |||||||
11346 | // FIXME: Add a new kind of DeclarationName for an inherited constructor. | ||||||
11347 | // For now we use the name of the base class constructor as a member of the | ||||||
11348 | // derived class to indicate a (fake) inherited constructor name. | ||||||
11349 | DeclarationName Name = BaseCtor->getDeclName(); | ||||||
11350 | |||||||
11351 | // Check to see if we already have a fake constructor for this inherited | ||||||
11352 | // constructor call. | ||||||
11353 | for (NamedDecl *Ctor : Derived->lookup(Name)) | ||||||
11354 | if (declaresSameEntity(cast<CXXConstructorDecl>(Ctor) | ||||||
11355 | ->getInheritedConstructor() | ||||||
11356 | .getConstructor(), | ||||||
11357 | BaseCtor)) | ||||||
11358 | return cast<CXXConstructorDecl>(Ctor); | ||||||
11359 | |||||||
11360 | DeclarationNameInfo NameInfo(Name, UsingLoc); | ||||||
11361 | TypeSourceInfo *TInfo = | ||||||
11362 | Context.getTrivialTypeSourceInfo(BaseCtor->getType(), UsingLoc); | ||||||
11363 | FunctionProtoTypeLoc ProtoLoc = | ||||||
11364 | TInfo->getTypeLoc().IgnoreParens().castAs<FunctionProtoTypeLoc>(); | ||||||
11365 | |||||||
11366 | // Check the inherited constructor is valid and find the list of base classes | ||||||
11367 | // from which it was inherited. | ||||||
11368 | InheritedConstructorInfo ICI(*this, Loc, Shadow); | ||||||
11369 | |||||||
11370 | bool Constexpr = | ||||||
11371 | BaseCtor->isConstexpr() && | ||||||
11372 | defaultedSpecialMemberIsConstexpr(*this, Derived, CXXDefaultConstructor, | ||||||
11373 | false, BaseCtor, &ICI); | ||||||
11374 | |||||||
11375 | CXXConstructorDecl *DerivedCtor = CXXConstructorDecl::Create( | ||||||
11376 | Context, Derived, UsingLoc, NameInfo, TInfo->getType(), TInfo, | ||||||
11377 | BaseCtor->getExplicitSpecifier(), /*isInline=*/true, | ||||||
11378 | /*isImplicitlyDeclared=*/true, | ||||||
11379 | Constexpr ? BaseCtor->getConstexprKind() : CSK_unspecified, | ||||||
11380 | InheritedConstructor(Shadow, BaseCtor)); | ||||||
11381 | if (Shadow->isInvalidDecl()) | ||||||
11382 | DerivedCtor->setInvalidDecl(); | ||||||
11383 | |||||||
11384 | // Build an unevaluated exception specification for this fake constructor. | ||||||
11385 | const FunctionProtoType *FPT = TInfo->getType()->castAs<FunctionProtoType>(); | ||||||
11386 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||||
11387 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||
11388 | EPI.ExceptionSpec.SourceDecl = DerivedCtor; | ||||||
11389 | DerivedCtor->setType(Context.getFunctionType(FPT->getReturnType(), | ||||||
11390 | FPT->getParamTypes(), EPI)); | ||||||
11391 | |||||||
11392 | // Build the parameter declarations. | ||||||
11393 | SmallVector<ParmVarDecl *, 16> ParamDecls; | ||||||
11394 | for (unsigned I = 0, N = FPT->getNumParams(); I != N; ++I) { | ||||||
11395 | TypeSourceInfo *TInfo = | ||||||
11396 | Context.getTrivialTypeSourceInfo(FPT->getParamType(I), UsingLoc); | ||||||
11397 | ParmVarDecl *PD = ParmVarDecl::Create( | ||||||
11398 | Context, DerivedCtor, UsingLoc, UsingLoc, /*IdentifierInfo=*/nullptr, | ||||||
11399 | FPT->getParamType(I), TInfo, SC_None, /*DefArg=*/nullptr); | ||||||
11400 | PD->setScopeInfo(0, I); | ||||||
11401 | PD->setImplicit(); | ||||||
11402 | // Ensure attributes are propagated onto parameters (this matters for | ||||||
11403 | // format, pass_object_size, ...). | ||||||
11404 | mergeDeclAttributes(PD, BaseCtor->getParamDecl(I)); | ||||||
11405 | ParamDecls.push_back(PD); | ||||||
11406 | ProtoLoc.setParam(I, PD); | ||||||
11407 | } | ||||||
11408 | |||||||
11409 | // Set up the new constructor. | ||||||
11410 | assert(!BaseCtor->isDeleted() && "should not use deleted constructor")((!BaseCtor->isDeleted() && "should not use deleted constructor" ) ? static_cast<void> (0) : __assert_fail ("!BaseCtor->isDeleted() && \"should not use deleted constructor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11410, __PRETTY_FUNCTION__)); | ||||||
11411 | DerivedCtor->setAccess(BaseCtor->getAccess()); | ||||||
11412 | DerivedCtor->setParams(ParamDecls); | ||||||
11413 | Derived->addDecl(DerivedCtor); | ||||||
11414 | |||||||
11415 | if (ShouldDeleteSpecialMember(DerivedCtor, CXXDefaultConstructor, &ICI)) | ||||||
11416 | SetDeclDeleted(DerivedCtor, UsingLoc); | ||||||
11417 | |||||||
11418 | return DerivedCtor; | ||||||
11419 | } | ||||||
11420 | |||||||
11421 | void Sema::NoteDeletedInheritingConstructor(CXXConstructorDecl *Ctor) { | ||||||
11422 | InheritedConstructorInfo ICI(*this, Ctor->getLocation(), | ||||||
11423 | Ctor->getInheritedConstructor().getShadowDecl()); | ||||||
11424 | ShouldDeleteSpecialMember(Ctor, CXXDefaultConstructor, &ICI, | ||||||
11425 | /*Diagnose*/true); | ||||||
11426 | } | ||||||
11427 | |||||||
11428 | void Sema::DefineInheritingConstructor(SourceLocation CurrentLocation, | ||||||
11429 | CXXConstructorDecl *Constructor) { | ||||||
11430 | CXXRecordDecl *ClassDecl = Constructor->getParent(); | ||||||
11431 | assert(Constructor->getInheritedConstructor() &&((Constructor->getInheritedConstructor() && !Constructor ->doesThisDeclarationHaveABody() && !Constructor-> isDeleted()) ? static_cast<void> (0) : __assert_fail ("Constructor->getInheritedConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11433, __PRETTY_FUNCTION__)) | ||||||
11432 | !Constructor->doesThisDeclarationHaveABody() &&((Constructor->getInheritedConstructor() && !Constructor ->doesThisDeclarationHaveABody() && !Constructor-> isDeleted()) ? static_cast<void> (0) : __assert_fail ("Constructor->getInheritedConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11433, __PRETTY_FUNCTION__)) | ||||||
11433 | !Constructor->isDeleted())((Constructor->getInheritedConstructor() && !Constructor ->doesThisDeclarationHaveABody() && !Constructor-> isDeleted()) ? static_cast<void> (0) : __assert_fail ("Constructor->getInheritedConstructor() && !Constructor->doesThisDeclarationHaveABody() && !Constructor->isDeleted()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11433, __PRETTY_FUNCTION__)); | ||||||
11434 | if (Constructor->willHaveBody() || Constructor->isInvalidDecl()) | ||||||
11435 | return; | ||||||
11436 | |||||||
11437 | // Initializations are performed "as if by a defaulted default constructor", | ||||||
11438 | // so enter the appropriate scope. | ||||||
11439 | SynthesizedFunctionScope Scope(*this, Constructor); | ||||||
11440 | |||||||
11441 | // The exception specification is needed because we are defining the | ||||||
11442 | // function. | ||||||
11443 | ResolveExceptionSpec(CurrentLocation, | ||||||
11444 | Constructor->getType()->castAs<FunctionProtoType>()); | ||||||
11445 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||
11446 | |||||||
11447 | // Add a context note for diagnostics produced after this point. | ||||||
11448 | Scope.addContextNote(CurrentLocation); | ||||||
11449 | |||||||
11450 | ConstructorUsingShadowDecl *Shadow = | ||||||
11451 | Constructor->getInheritedConstructor().getShadowDecl(); | ||||||
11452 | CXXConstructorDecl *InheritedCtor = | ||||||
11453 | Constructor->getInheritedConstructor().getConstructor(); | ||||||
11454 | |||||||
11455 | // [class.inhctor.init]p1: | ||||||
11456 | // initialization proceeds as if a defaulted default constructor is used to | ||||||
11457 | // initialize the D object and each base class subobject from which the | ||||||
11458 | // constructor was inherited | ||||||
11459 | |||||||
11460 | InheritedConstructorInfo ICI(*this, CurrentLocation, Shadow); | ||||||
11461 | CXXRecordDecl *RD = Shadow->getParent(); | ||||||
11462 | SourceLocation InitLoc = Shadow->getLocation(); | ||||||
11463 | |||||||
11464 | // Build explicit initializers for all base classes from which the | ||||||
11465 | // constructor was inherited. | ||||||
11466 | SmallVector<CXXCtorInitializer*, 8> Inits; | ||||||
11467 | for (bool VBase : {false, true}) { | ||||||
11468 | for (CXXBaseSpecifier &B : VBase ? RD->vbases() : RD->bases()) { | ||||||
11469 | if (B.isVirtual() != VBase) | ||||||
11470 | continue; | ||||||
11471 | |||||||
11472 | auto *BaseRD = B.getType()->getAsCXXRecordDecl(); | ||||||
11473 | if (!BaseRD) | ||||||
11474 | continue; | ||||||
11475 | |||||||
11476 | auto BaseCtor = ICI.findConstructorForBase(BaseRD, InheritedCtor); | ||||||
11477 | if (!BaseCtor.first) | ||||||
11478 | continue; | ||||||
11479 | |||||||
11480 | MarkFunctionReferenced(CurrentLocation, BaseCtor.first); | ||||||
11481 | ExprResult Init = new (Context) CXXInheritedCtorInitExpr( | ||||||
11482 | InitLoc, B.getType(), BaseCtor.first, VBase, BaseCtor.second); | ||||||
11483 | |||||||
11484 | auto *TInfo = Context.getTrivialTypeSourceInfo(B.getType(), InitLoc); | ||||||
11485 | Inits.push_back(new (Context) CXXCtorInitializer( | ||||||
11486 | Context, TInfo, VBase, InitLoc, Init.get(), InitLoc, | ||||||
11487 | SourceLocation())); | ||||||
11488 | } | ||||||
11489 | } | ||||||
11490 | |||||||
11491 | // We now proceed as if for a defaulted default constructor, with the relevant | ||||||
11492 | // initializers replaced. | ||||||
11493 | |||||||
11494 | if (SetCtorInitializers(Constructor, /*AnyErrors*/false, Inits)) { | ||||||
11495 | Constructor->setInvalidDecl(); | ||||||
11496 | return; | ||||||
11497 | } | ||||||
11498 | |||||||
11499 | Constructor->setBody(new (Context) CompoundStmt(InitLoc)); | ||||||
11500 | Constructor->markUsed(Context); | ||||||
11501 | |||||||
11502 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
11503 | L->CompletedImplicitDefinition(Constructor); | ||||||
11504 | } | ||||||
11505 | |||||||
11506 | DiagnoseUninitializedFields(*this, Constructor); | ||||||
11507 | } | ||||||
11508 | |||||||
11509 | CXXDestructorDecl *Sema::DeclareImplicitDestructor(CXXRecordDecl *ClassDecl) { | ||||||
11510 | // C++ [class.dtor]p2: | ||||||
11511 | // If a class has no user-declared destructor, a destructor is | ||||||
11512 | // declared implicitly. An implicitly-declared destructor is an | ||||||
11513 | // inline public member of its class. | ||||||
11514 | assert(ClassDecl->needsImplicitDestructor())((ClassDecl->needsImplicitDestructor()) ? static_cast<void > (0) : __assert_fail ("ClassDecl->needsImplicitDestructor()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11514, __PRETTY_FUNCTION__)); | ||||||
11515 | |||||||
11516 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXDestructor); | ||||||
11517 | if (DSM.isAlreadyBeingDeclared()) | ||||||
11518 | return nullptr; | ||||||
11519 | |||||||
11520 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||
11521 | CXXDestructor, | ||||||
11522 | false); | ||||||
11523 | |||||||
11524 | // Create the actual destructor declaration. | ||||||
11525 | CanQualType ClassType | ||||||
11526 | = Context.getCanonicalType(Context.getTypeDeclType(ClassDecl)); | ||||||
11527 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||
11528 | DeclarationName Name | ||||||
11529 | = Context.DeclarationNames.getCXXDestructorName(ClassType); | ||||||
11530 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||
11531 | CXXDestructorDecl *Destructor = | ||||||
11532 | CXXDestructorDecl::Create(Context, ClassDecl, ClassLoc, NameInfo, | ||||||
11533 | QualType(), nullptr, /*isInline=*/true, | ||||||
11534 | /*isImplicitlyDeclared=*/true, | ||||||
11535 | Constexpr ? CSK_constexpr : CSK_unspecified); | ||||||
11536 | Destructor->setAccess(AS_public); | ||||||
11537 | Destructor->setDefaulted(); | ||||||
11538 | |||||||
11539 | if (getLangOpts().CUDA) { | ||||||
11540 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXDestructor, | ||||||
11541 | Destructor, | ||||||
11542 | /* ConstRHS */ false, | ||||||
11543 | /* Diagnose */ false); | ||||||
11544 | } | ||||||
11545 | |||||||
11546 | setupImplicitSpecialMemberType(Destructor, Context.VoidTy, None); | ||||||
11547 | |||||||
11548 | // We don't need to use SpecialMemberIsTrivial here; triviality for | ||||||
11549 | // destructors is easy to compute. | ||||||
11550 | Destructor->setTrivial(ClassDecl->hasTrivialDestructor()); | ||||||
11551 | Destructor->setTrivialForCall(ClassDecl->hasAttr<TrivialABIAttr>() || | ||||||
11552 | ClassDecl->hasTrivialDestructorForCall()); | ||||||
11553 | |||||||
11554 | // Note that we have declared this destructor. | ||||||
11555 | ++getASTContext().NumImplicitDestructorsDeclared; | ||||||
11556 | |||||||
11557 | Scope *S = getScopeForContext(ClassDecl); | ||||||
11558 | CheckImplicitSpecialMemberDeclaration(S, Destructor); | ||||||
11559 | |||||||
11560 | // We can't check whether an implicit destructor is deleted before we complete | ||||||
11561 | // the definition of the class, because its validity depends on the alignment | ||||||
11562 | // of the class. We'll check this from ActOnFields once the class is complete. | ||||||
11563 | if (ClassDecl->isCompleteDefinition() && | ||||||
11564 | ShouldDeleteSpecialMember(Destructor, CXXDestructor)) | ||||||
11565 | SetDeclDeleted(Destructor, ClassLoc); | ||||||
11566 | |||||||
11567 | // Introduce this destructor into its scope. | ||||||
11568 | if (S) | ||||||
11569 | PushOnScopeChains(Destructor, S, false); | ||||||
11570 | ClassDecl->addDecl(Destructor); | ||||||
11571 | |||||||
11572 | return Destructor; | ||||||
11573 | } | ||||||
11574 | |||||||
11575 | void Sema::DefineImplicitDestructor(SourceLocation CurrentLocation, | ||||||
11576 | CXXDestructorDecl *Destructor) { | ||||||
11577 | assert((Destructor->isDefaulted() &&(((Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody () && !Destructor->isDeleted()) && "DefineImplicitDestructor - call it for implicit default dtor" ) ? static_cast<void> (0) : __assert_fail ("(Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor->isDeleted()) && \"DefineImplicitDestructor - call it for implicit default dtor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11580, __PRETTY_FUNCTION__)) | ||||||
11578 | !Destructor->doesThisDeclarationHaveABody() &&(((Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody () && !Destructor->isDeleted()) && "DefineImplicitDestructor - call it for implicit default dtor" ) ? static_cast<void> (0) : __assert_fail ("(Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor->isDeleted()) && \"DefineImplicitDestructor - call it for implicit default dtor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11580, __PRETTY_FUNCTION__)) | ||||||
11579 | !Destructor->isDeleted()) &&(((Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody () && !Destructor->isDeleted()) && "DefineImplicitDestructor - call it for implicit default dtor" ) ? static_cast<void> (0) : __assert_fail ("(Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor->isDeleted()) && \"DefineImplicitDestructor - call it for implicit default dtor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11580, __PRETTY_FUNCTION__)) | ||||||
11580 | "DefineImplicitDestructor - call it for implicit default dtor")(((Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody () && !Destructor->isDeleted()) && "DefineImplicitDestructor - call it for implicit default dtor" ) ? static_cast<void> (0) : __assert_fail ("(Destructor->isDefaulted() && !Destructor->doesThisDeclarationHaveABody() && !Destructor->isDeleted()) && \"DefineImplicitDestructor - call it for implicit default dtor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11580, __PRETTY_FUNCTION__)); | ||||||
11581 | if (Destructor->willHaveBody() || Destructor->isInvalidDecl()) | ||||||
11582 | return; | ||||||
11583 | |||||||
11584 | CXXRecordDecl *ClassDecl = Destructor->getParent(); | ||||||
11585 | assert(ClassDecl && "DefineImplicitDestructor - invalid destructor")((ClassDecl && "DefineImplicitDestructor - invalid destructor" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl && \"DefineImplicitDestructor - invalid destructor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11585, __PRETTY_FUNCTION__)); | ||||||
11586 | |||||||
11587 | SynthesizedFunctionScope Scope(*this, Destructor); | ||||||
11588 | |||||||
11589 | // The exception specification is needed because we are defining the | ||||||
11590 | // function. | ||||||
11591 | ResolveExceptionSpec(CurrentLocation, | ||||||
11592 | Destructor->getType()->castAs<FunctionProtoType>()); | ||||||
11593 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||
11594 | |||||||
11595 | // Add a context note for diagnostics produced after this point. | ||||||
11596 | Scope.addContextNote(CurrentLocation); | ||||||
11597 | |||||||
11598 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), | ||||||
11599 | Destructor->getParent()); | ||||||
11600 | |||||||
11601 | if (CheckDestructor(Destructor)) { | ||||||
11602 | Destructor->setInvalidDecl(); | ||||||
11603 | return; | ||||||
11604 | } | ||||||
11605 | |||||||
11606 | SourceLocation Loc = Destructor->getEndLoc().isValid() | ||||||
11607 | ? Destructor->getEndLoc() | ||||||
11608 | : Destructor->getLocation(); | ||||||
11609 | Destructor->setBody(new (Context) CompoundStmt(Loc)); | ||||||
11610 | Destructor->markUsed(Context); | ||||||
11611 | |||||||
11612 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
11613 | L->CompletedImplicitDefinition(Destructor); | ||||||
11614 | } | ||||||
11615 | } | ||||||
11616 | |||||||
11617 | /// Perform any semantic analysis which needs to be delayed until all | ||||||
11618 | /// pending class member declarations have been parsed. | ||||||
11619 | void Sema::ActOnFinishCXXMemberDecls() { | ||||||
11620 | // If the context is an invalid C++ class, just suppress these checks. | ||||||
11621 | if (CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(CurContext)) { | ||||||
11622 | if (Record->isInvalidDecl()) { | ||||||
11623 | DelayedOverridingExceptionSpecChecks.clear(); | ||||||
11624 | DelayedEquivalentExceptionSpecChecks.clear(); | ||||||
11625 | return; | ||||||
11626 | } | ||||||
11627 | checkForMultipleExportedDefaultConstructors(*this, Record); | ||||||
11628 | } | ||||||
11629 | } | ||||||
11630 | |||||||
11631 | void Sema::ActOnFinishCXXNonNestedClass(Decl *D) { | ||||||
11632 | referenceDLLExportedClassMethods(); | ||||||
11633 | |||||||
11634 | if (!DelayedDllExportMemberFunctions.empty()) { | ||||||
11635 | SmallVector<CXXMethodDecl*, 4> WorkList; | ||||||
11636 | std::swap(DelayedDllExportMemberFunctions, WorkList); | ||||||
11637 | for (CXXMethodDecl *M : WorkList) { | ||||||
11638 | DefineImplicitSpecialMember(*this, M, M->getLocation()); | ||||||
11639 | |||||||
11640 | // Pass the method to the consumer to get emitted. This is not necessary | ||||||
11641 | // for explicit instantiation definitions, as they will get emitted | ||||||
11642 | // anyway. | ||||||
11643 | if (M->getParent()->getTemplateSpecializationKind() != | ||||||
11644 | TSK_ExplicitInstantiationDefinition) | ||||||
11645 | ActOnFinishInlineFunctionDef(M); | ||||||
11646 | } | ||||||
11647 | } | ||||||
11648 | } | ||||||
11649 | |||||||
11650 | void Sema::referenceDLLExportedClassMethods() { | ||||||
11651 | if (!DelayedDllExportClasses.empty()) { | ||||||
11652 | // Calling ReferenceDllExportedMembers might cause the current function to | ||||||
11653 | // be called again, so use a local copy of DelayedDllExportClasses. | ||||||
11654 | SmallVector<CXXRecordDecl *, 4> WorkList; | ||||||
11655 | std::swap(DelayedDllExportClasses, WorkList); | ||||||
11656 | for (CXXRecordDecl *Class : WorkList) | ||||||
11657 | ReferenceDllExportedMembers(*this, Class); | ||||||
11658 | } | ||||||
11659 | } | ||||||
11660 | |||||||
11661 | void Sema::AdjustDestructorExceptionSpec(CXXDestructorDecl *Destructor) { | ||||||
11662 | assert(getLangOpts().CPlusPlus11 &&((getLangOpts().CPlusPlus11 && "adjusting dtor exception specs was introduced in c++11" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus11 && \"adjusting dtor exception specs was introduced in c++11\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11663, __PRETTY_FUNCTION__)) | ||||||
11663 | "adjusting dtor exception specs was introduced in c++11")((getLangOpts().CPlusPlus11 && "adjusting dtor exception specs was introduced in c++11" ) ? static_cast<void> (0) : __assert_fail ("getLangOpts().CPlusPlus11 && \"adjusting dtor exception specs was introduced in c++11\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11663, __PRETTY_FUNCTION__)); | ||||||
11664 | |||||||
11665 | if (Destructor->isDependentContext()) | ||||||
11666 | return; | ||||||
11667 | |||||||
11668 | // C++11 [class.dtor]p3: | ||||||
11669 | // A declaration of a destructor that does not have an exception- | ||||||
11670 | // specification is implicitly considered to have the same exception- | ||||||
11671 | // specification as an implicit declaration. | ||||||
11672 | const FunctionProtoType *DtorType = Destructor->getType()-> | ||||||
11673 | getAs<FunctionProtoType>(); | ||||||
11674 | if (DtorType->hasExceptionSpec()) | ||||||
11675 | return; | ||||||
11676 | |||||||
11677 | // Replace the destructor's type, building off the existing one. Fortunately, | ||||||
11678 | // the only thing of interest in the destructor type is its extended info. | ||||||
11679 | // The return and arguments are fixed. | ||||||
11680 | FunctionProtoType::ExtProtoInfo EPI = DtorType->getExtProtoInfo(); | ||||||
11681 | EPI.ExceptionSpec.Type = EST_Unevaluated; | ||||||
11682 | EPI.ExceptionSpec.SourceDecl = Destructor; | ||||||
11683 | Destructor->setType(Context.getFunctionType(Context.VoidTy, None, EPI)); | ||||||
11684 | |||||||
11685 | // FIXME: If the destructor has a body that could throw, and the newly created | ||||||
11686 | // spec doesn't allow exceptions, we should emit a warning, because this | ||||||
11687 | // change in behavior can break conforming C++03 programs at runtime. | ||||||
11688 | // However, we don't have a body or an exception specification yet, so it | ||||||
11689 | // needs to be done somewhere else. | ||||||
11690 | } | ||||||
11691 | |||||||
11692 | namespace { | ||||||
11693 | /// An abstract base class for all helper classes used in building the | ||||||
11694 | // copy/move operators. These classes serve as factory functions and help us | ||||||
11695 | // avoid using the same Expr* in the AST twice. | ||||||
11696 | class ExprBuilder { | ||||||
11697 | ExprBuilder(const ExprBuilder&) = delete; | ||||||
11698 | ExprBuilder &operator=(const ExprBuilder&) = delete; | ||||||
11699 | |||||||
11700 | protected: | ||||||
11701 | static Expr *assertNotNull(Expr *E) { | ||||||
11702 | assert(E && "Expression construction must not fail.")((E && "Expression construction must not fail.") ? static_cast <void> (0) : __assert_fail ("E && \"Expression construction must not fail.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11702, __PRETTY_FUNCTION__)); | ||||||
11703 | return E; | ||||||
11704 | } | ||||||
11705 | |||||||
11706 | public: | ||||||
11707 | ExprBuilder() {} | ||||||
11708 | virtual ~ExprBuilder() {} | ||||||
11709 | |||||||
11710 | virtual Expr *build(Sema &S, SourceLocation Loc) const = 0; | ||||||
11711 | }; | ||||||
11712 | |||||||
11713 | class RefBuilder: public ExprBuilder { | ||||||
11714 | VarDecl *Var; | ||||||
11715 | QualType VarType; | ||||||
11716 | |||||||
11717 | public: | ||||||
11718 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||
11719 | return assertNotNull(S.BuildDeclRefExpr(Var, VarType, VK_LValue, Loc)); | ||||||
11720 | } | ||||||
11721 | |||||||
11722 | RefBuilder(VarDecl *Var, QualType VarType) | ||||||
11723 | : Var(Var), VarType(VarType) {} | ||||||
11724 | }; | ||||||
11725 | |||||||
11726 | class ThisBuilder: public ExprBuilder { | ||||||
11727 | public: | ||||||
11728 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||
11729 | return assertNotNull(S.ActOnCXXThis(Loc).getAs<Expr>()); | ||||||
11730 | } | ||||||
11731 | }; | ||||||
11732 | |||||||
11733 | class CastBuilder: public ExprBuilder { | ||||||
11734 | const ExprBuilder &Builder; | ||||||
11735 | QualType Type; | ||||||
11736 | ExprValueKind Kind; | ||||||
11737 | const CXXCastPath &Path; | ||||||
11738 | |||||||
11739 | public: | ||||||
11740 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||
11741 | return assertNotNull(S.ImpCastExprToType(Builder.build(S, Loc), Type, | ||||||
11742 | CK_UncheckedDerivedToBase, Kind, | ||||||
11743 | &Path).get()); | ||||||
11744 | } | ||||||
11745 | |||||||
11746 | CastBuilder(const ExprBuilder &Builder, QualType Type, ExprValueKind Kind, | ||||||
11747 | const CXXCastPath &Path) | ||||||
11748 | : Builder(Builder), Type(Type), Kind(Kind), Path(Path) {} | ||||||
11749 | }; | ||||||
11750 | |||||||
11751 | class DerefBuilder: public ExprBuilder { | ||||||
11752 | const ExprBuilder &Builder; | ||||||
11753 | |||||||
11754 | public: | ||||||
11755 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||
11756 | return assertNotNull( | ||||||
11757 | S.CreateBuiltinUnaryOp(Loc, UO_Deref, Builder.build(S, Loc)).get()); | ||||||
11758 | } | ||||||
11759 | |||||||
11760 | DerefBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||||
11761 | }; | ||||||
11762 | |||||||
11763 | class MemberBuilder: public ExprBuilder { | ||||||
11764 | const ExprBuilder &Builder; | ||||||
11765 | QualType Type; | ||||||
11766 | CXXScopeSpec SS; | ||||||
11767 | bool IsArrow; | ||||||
11768 | LookupResult &MemberLookup; | ||||||
11769 | |||||||
11770 | public: | ||||||
11771 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||
11772 | return assertNotNull(S.BuildMemberReferenceExpr( | ||||||
11773 | Builder.build(S, Loc), Type, Loc, IsArrow, SS, SourceLocation(), | ||||||
11774 | nullptr, MemberLookup, nullptr, nullptr).get()); | ||||||
11775 | } | ||||||
11776 | |||||||
11777 | MemberBuilder(const ExprBuilder &Builder, QualType Type, bool IsArrow, | ||||||
11778 | LookupResult &MemberLookup) | ||||||
11779 | : Builder(Builder), Type(Type), IsArrow(IsArrow), | ||||||
11780 | MemberLookup(MemberLookup) {} | ||||||
11781 | }; | ||||||
11782 | |||||||
11783 | class MoveCastBuilder: public ExprBuilder { | ||||||
11784 | const ExprBuilder &Builder; | ||||||
11785 | |||||||
11786 | public: | ||||||
11787 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||
11788 | return assertNotNull(CastForMoving(S, Builder.build(S, Loc))); | ||||||
11789 | } | ||||||
11790 | |||||||
11791 | MoveCastBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||||
11792 | }; | ||||||
11793 | |||||||
11794 | class LvalueConvBuilder: public ExprBuilder { | ||||||
11795 | const ExprBuilder &Builder; | ||||||
11796 | |||||||
11797 | public: | ||||||
11798 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||
11799 | return assertNotNull( | ||||||
11800 | S.DefaultLvalueConversion(Builder.build(S, Loc)).get()); | ||||||
11801 | } | ||||||
11802 | |||||||
11803 | LvalueConvBuilder(const ExprBuilder &Builder) : Builder(Builder) {} | ||||||
11804 | }; | ||||||
11805 | |||||||
11806 | class SubscriptBuilder: public ExprBuilder { | ||||||
11807 | const ExprBuilder &Base; | ||||||
11808 | const ExprBuilder &Index; | ||||||
11809 | |||||||
11810 | public: | ||||||
11811 | Expr *build(Sema &S, SourceLocation Loc) const override { | ||||||
11812 | return assertNotNull(S.CreateBuiltinArraySubscriptExpr( | ||||||
11813 | Base.build(S, Loc), Loc, Index.build(S, Loc), Loc).get()); | ||||||
11814 | } | ||||||
11815 | |||||||
11816 | SubscriptBuilder(const ExprBuilder &Base, const ExprBuilder &Index) | ||||||
11817 | : Base(Base), Index(Index) {} | ||||||
11818 | }; | ||||||
11819 | |||||||
11820 | } // end anonymous namespace | ||||||
11821 | |||||||
11822 | /// When generating a defaulted copy or move assignment operator, if a field | ||||||
11823 | /// should be copied with __builtin_memcpy rather than via explicit assignments, | ||||||
11824 | /// do so. This optimization only applies for arrays of scalars, and for arrays | ||||||
11825 | /// of class type where the selected copy/move-assignment operator is trivial. | ||||||
11826 | static StmtResult | ||||||
11827 | buildMemcpyForAssignmentOp(Sema &S, SourceLocation Loc, QualType T, | ||||||
11828 | const ExprBuilder &ToB, const ExprBuilder &FromB) { | ||||||
11829 | // Compute the size of the memory buffer to be copied. | ||||||
11830 | QualType SizeType = S.Context.getSizeType(); | ||||||
11831 | llvm::APInt Size(S.Context.getTypeSize(SizeType), | ||||||
11832 | S.Context.getTypeSizeInChars(T).getQuantity()); | ||||||
11833 | |||||||
11834 | // Take the address of the field references for "from" and "to". We | ||||||
11835 | // directly construct UnaryOperators here because semantic analysis | ||||||
11836 | // does not permit us to take the address of an xvalue. | ||||||
11837 | Expr *From = FromB.build(S, Loc); | ||||||
11838 | From = new (S.Context) UnaryOperator(From, UO_AddrOf, | ||||||
11839 | S.Context.getPointerType(From->getType()), | ||||||
11840 | VK_RValue, OK_Ordinary, Loc, false); | ||||||
11841 | Expr *To = ToB.build(S, Loc); | ||||||
11842 | To = new (S.Context) UnaryOperator(To, UO_AddrOf, | ||||||
11843 | S.Context.getPointerType(To->getType()), | ||||||
11844 | VK_RValue, OK_Ordinary, Loc, false); | ||||||
11845 | |||||||
11846 | const Type *E = T->getBaseElementTypeUnsafe(); | ||||||
11847 | bool NeedsCollectableMemCpy = | ||||||
11848 | E->isRecordType() && E->getAs<RecordType>()->getDecl()->hasObjectMember(); | ||||||
11849 | |||||||
11850 | // Create a reference to the __builtin_objc_memmove_collectable function | ||||||
11851 | StringRef MemCpyName = NeedsCollectableMemCpy ? | ||||||
11852 | "__builtin_objc_memmove_collectable" : | ||||||
11853 | "__builtin_memcpy"; | ||||||
11854 | LookupResult R(S, &S.Context.Idents.get(MemCpyName), Loc, | ||||||
11855 | Sema::LookupOrdinaryName); | ||||||
11856 | S.LookupName(R, S.TUScope, true); | ||||||
11857 | |||||||
11858 | FunctionDecl *MemCpy = R.getAsSingle<FunctionDecl>(); | ||||||
11859 | if (!MemCpy) | ||||||
11860 | // Something went horribly wrong earlier, and we will have complained | ||||||
11861 | // about it. | ||||||
11862 | return StmtError(); | ||||||
11863 | |||||||
11864 | ExprResult MemCpyRef = S.BuildDeclRefExpr(MemCpy, S.Context.BuiltinFnTy, | ||||||
11865 | VK_RValue, Loc, nullptr); | ||||||
11866 | assert(MemCpyRef.isUsable() && "Builtin reference cannot fail")((MemCpyRef.isUsable() && "Builtin reference cannot fail" ) ? static_cast<void> (0) : __assert_fail ("MemCpyRef.isUsable() && \"Builtin reference cannot fail\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11866, __PRETTY_FUNCTION__)); | ||||||
11867 | |||||||
11868 | Expr *CallArgs[] = { | ||||||
11869 | To, From, IntegerLiteral::Create(S.Context, Size, SizeType, Loc) | ||||||
11870 | }; | ||||||
11871 | ExprResult Call = S.BuildCallExpr(/*Scope=*/nullptr, MemCpyRef.get(), | ||||||
11872 | Loc, CallArgs, Loc); | ||||||
11873 | |||||||
11874 | assert(!Call.isInvalid() && "Call to __builtin_memcpy cannot fail!")((!Call.isInvalid() && "Call to __builtin_memcpy cannot fail!" ) ? static_cast<void> (0) : __assert_fail ("!Call.isInvalid() && \"Call to __builtin_memcpy cannot fail!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 11874, __PRETTY_FUNCTION__)); | ||||||
11875 | return Call.getAs<Stmt>(); | ||||||
11876 | } | ||||||
11877 | |||||||
11878 | /// Builds a statement that copies/moves the given entity from \p From to | ||||||
11879 | /// \c To. | ||||||
11880 | /// | ||||||
11881 | /// This routine is used to copy/move the members of a class with an | ||||||
11882 | /// implicitly-declared copy/move assignment operator. When the entities being | ||||||
11883 | /// copied are arrays, this routine builds for loops to copy them. | ||||||
11884 | /// | ||||||
11885 | /// \param S The Sema object used for type-checking. | ||||||
11886 | /// | ||||||
11887 | /// \param Loc The location where the implicit copy/move is being generated. | ||||||
11888 | /// | ||||||
11889 | /// \param T The type of the expressions being copied/moved. Both expressions | ||||||
11890 | /// must have this type. | ||||||
11891 | /// | ||||||
11892 | /// \param To The expression we are copying/moving to. | ||||||
11893 | /// | ||||||
11894 | /// \param From The expression we are copying/moving from. | ||||||
11895 | /// | ||||||
11896 | /// \param CopyingBaseSubobject Whether we're copying/moving a base subobject. | ||||||
11897 | /// Otherwise, it's a non-static member subobject. | ||||||
11898 | /// | ||||||
11899 | /// \param Copying Whether we're copying or moving. | ||||||
11900 | /// | ||||||
11901 | /// \param Depth Internal parameter recording the depth of the recursion. | ||||||
11902 | /// | ||||||
11903 | /// \returns A statement or a loop that copies the expressions, or StmtResult(0) | ||||||
11904 | /// if a memcpy should be used instead. | ||||||
11905 | static StmtResult | ||||||
11906 | buildSingleCopyAssignRecursively(Sema &S, SourceLocation Loc, QualType T, | ||||||
11907 | const ExprBuilder &To, const ExprBuilder &From, | ||||||
11908 | bool CopyingBaseSubobject, bool Copying, | ||||||
11909 | unsigned Depth = 0) { | ||||||
11910 | // C++11 [class.copy]p28: | ||||||
11911 | // Each subobject is assigned in the manner appropriate to its type: | ||||||
11912 | // | ||||||
11913 | // - if the subobject is of class type, as if by a call to operator= with | ||||||
11914 | // the subobject as the object expression and the corresponding | ||||||
11915 | // subobject of x as a single function argument (as if by explicit | ||||||
11916 | // qualification; that is, ignoring any possible virtual overriding | ||||||
11917 | // functions in more derived classes); | ||||||
11918 | // | ||||||
11919 | // C++03 [class.copy]p13: | ||||||
11920 | // - if the subobject is of class type, the copy assignment operator for | ||||||
11921 | // the class is used (as if by explicit qualification; that is, | ||||||
11922 | // ignoring any possible virtual overriding functions in more derived | ||||||
11923 | // classes); | ||||||
11924 | if (const RecordType *RecordTy = T->getAs<RecordType>()) { | ||||||
11925 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||||
11926 | |||||||
11927 | // Look for operator=. | ||||||
11928 | DeclarationName Name | ||||||
11929 | = S.Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||||
11930 | LookupResult OpLookup(S, Name, Loc, Sema::LookupOrdinaryName); | ||||||
11931 | S.LookupQualifiedName(OpLookup, ClassDecl, false); | ||||||
11932 | |||||||
11933 | // Prior to C++11, filter out any result that isn't a copy/move-assignment | ||||||
11934 | // operator. | ||||||
11935 | if (!S.getLangOpts().CPlusPlus11) { | ||||||
11936 | LookupResult::Filter F = OpLookup.makeFilter(); | ||||||
11937 | while (F.hasNext()) { | ||||||
11938 | NamedDecl *D = F.next(); | ||||||
11939 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(D)) | ||||||
11940 | if (Method->isCopyAssignmentOperator() || | ||||||
11941 | (!Copying && Method->isMoveAssignmentOperator())) | ||||||
11942 | continue; | ||||||
11943 | |||||||
11944 | F.erase(); | ||||||
11945 | } | ||||||
11946 | F.done(); | ||||||
11947 | } | ||||||
11948 | |||||||
11949 | // Suppress the protected check (C++ [class.protected]) for each of the | ||||||
11950 | // assignment operators we found. This strange dance is required when | ||||||
11951 | // we're assigning via a base classes's copy-assignment operator. To | ||||||
11952 | // ensure that we're getting the right base class subobject (without | ||||||
11953 | // ambiguities), we need to cast "this" to that subobject type; to | ||||||
11954 | // ensure that we don't go through the virtual call mechanism, we need | ||||||
11955 | // to qualify the operator= name with the base class (see below). However, | ||||||
11956 | // this means that if the base class has a protected copy assignment | ||||||
11957 | // operator, the protected member access check will fail. So, we | ||||||
11958 | // rewrite "protected" access to "public" access in this case, since we | ||||||
11959 | // know by construction that we're calling from a derived class. | ||||||
11960 | if (CopyingBaseSubobject) { | ||||||
11961 | for (LookupResult::iterator L = OpLookup.begin(), LEnd = OpLookup.end(); | ||||||
11962 | L != LEnd; ++L) { | ||||||
11963 | if (L.getAccess() == AS_protected) | ||||||
11964 | L.setAccess(AS_public); | ||||||
11965 | } | ||||||
11966 | } | ||||||
11967 | |||||||
11968 | // Create the nested-name-specifier that will be used to qualify the | ||||||
11969 | // reference to operator=; this is required to suppress the virtual | ||||||
11970 | // call mechanism. | ||||||
11971 | CXXScopeSpec SS; | ||||||
11972 | const Type *CanonicalT = S.Context.getCanonicalType(T.getTypePtr()); | ||||||
11973 | SS.MakeTrivial(S.Context, | ||||||
11974 | NestedNameSpecifier::Create(S.Context, nullptr, false, | ||||||
11975 | CanonicalT), | ||||||
11976 | Loc); | ||||||
11977 | |||||||
11978 | // Create the reference to operator=. | ||||||
11979 | ExprResult OpEqualRef | ||||||
11980 | = S.BuildMemberReferenceExpr(To.build(S, Loc), T, Loc, /*IsArrow=*/false, | ||||||
11981 | SS, /*TemplateKWLoc=*/SourceLocation(), | ||||||
11982 | /*FirstQualifierInScope=*/nullptr, | ||||||
11983 | OpLookup, | ||||||
11984 | /*TemplateArgs=*/nullptr, /*S*/nullptr, | ||||||
11985 | /*SuppressQualifierCheck=*/true); | ||||||
11986 | if (OpEqualRef.isInvalid()) | ||||||
11987 | return StmtError(); | ||||||
11988 | |||||||
11989 | // Build the call to the assignment operator. | ||||||
11990 | |||||||
11991 | Expr *FromInst = From.build(S, Loc); | ||||||
11992 | ExprResult Call = S.BuildCallToMemberFunction(/*Scope=*/nullptr, | ||||||
11993 | OpEqualRef.getAs<Expr>(), | ||||||
11994 | Loc, FromInst, Loc); | ||||||
11995 | if (Call.isInvalid()) | ||||||
11996 | return StmtError(); | ||||||
11997 | |||||||
11998 | // If we built a call to a trivial 'operator=' while copying an array, | ||||||
11999 | // bail out. We'll replace the whole shebang with a memcpy. | ||||||
12000 | CXXMemberCallExpr *CE = dyn_cast<CXXMemberCallExpr>(Call.get()); | ||||||
12001 | if (CE && CE->getMethodDecl()->isTrivial() && Depth) | ||||||
12002 | return StmtResult((Stmt*)nullptr); | ||||||
12003 | |||||||
12004 | // Convert to an expression-statement, and clean up any produced | ||||||
12005 | // temporaries. | ||||||
12006 | return S.ActOnExprStmt(Call); | ||||||
12007 | } | ||||||
12008 | |||||||
12009 | // - if the subobject is of scalar type, the built-in assignment | ||||||
12010 | // operator is used. | ||||||
12011 | const ConstantArrayType *ArrayTy = S.Context.getAsConstantArrayType(T); | ||||||
12012 | if (!ArrayTy) { | ||||||
12013 | ExprResult Assignment = S.CreateBuiltinBinOp( | ||||||
12014 | Loc, BO_Assign, To.build(S, Loc), From.build(S, Loc)); | ||||||
12015 | if (Assignment.isInvalid()) | ||||||
12016 | return StmtError(); | ||||||
12017 | return S.ActOnExprStmt(Assignment); | ||||||
12018 | } | ||||||
12019 | |||||||
12020 | // - if the subobject is an array, each element is assigned, in the | ||||||
12021 | // manner appropriate to the element type; | ||||||
12022 | |||||||
12023 | // Construct a loop over the array bounds, e.g., | ||||||
12024 | // | ||||||
12025 | // for (__SIZE_TYPE__ i0 = 0; i0 != array-size; ++i0) | ||||||
12026 | // | ||||||
12027 | // that will copy each of the array elements. | ||||||
12028 | QualType SizeType = S.Context.getSizeType(); | ||||||
12029 | |||||||
12030 | // Create the iteration variable. | ||||||
12031 | IdentifierInfo *IterationVarName = nullptr; | ||||||
12032 | { | ||||||
12033 | SmallString<8> Str; | ||||||
12034 | llvm::raw_svector_ostream OS(Str); | ||||||
12035 | OS << "__i" << Depth; | ||||||
12036 | IterationVarName = &S.Context.Idents.get(OS.str()); | ||||||
12037 | } | ||||||
12038 | VarDecl *IterationVar = VarDecl::Create(S.Context, S.CurContext, Loc, Loc, | ||||||
12039 | IterationVarName, SizeType, | ||||||
12040 | S.Context.getTrivialTypeSourceInfo(SizeType, Loc), | ||||||
12041 | SC_None); | ||||||
12042 | |||||||
12043 | // Initialize the iteration variable to zero. | ||||||
12044 | llvm::APInt Zero(S.Context.getTypeSize(SizeType), 0); | ||||||
12045 | IterationVar->setInit(IntegerLiteral::Create(S.Context, Zero, SizeType, Loc)); | ||||||
12046 | |||||||
12047 | // Creates a reference to the iteration variable. | ||||||
12048 | RefBuilder IterationVarRef(IterationVar, SizeType); | ||||||
12049 | LvalueConvBuilder IterationVarRefRVal(IterationVarRef); | ||||||
12050 | |||||||
12051 | // Create the DeclStmt that holds the iteration variable. | ||||||
12052 | Stmt *InitStmt = new (S.Context) DeclStmt(DeclGroupRef(IterationVar),Loc,Loc); | ||||||
12053 | |||||||
12054 | // Subscript the "from" and "to" expressions with the iteration variable. | ||||||
12055 | SubscriptBuilder FromIndexCopy(From, IterationVarRefRVal); | ||||||
12056 | MoveCastBuilder FromIndexMove(FromIndexCopy); | ||||||
12057 | const ExprBuilder *FromIndex; | ||||||
12058 | if (Copying) | ||||||
12059 | FromIndex = &FromIndexCopy; | ||||||
12060 | else | ||||||
12061 | FromIndex = &FromIndexMove; | ||||||
12062 | |||||||
12063 | SubscriptBuilder ToIndex(To, IterationVarRefRVal); | ||||||
12064 | |||||||
12065 | // Build the copy/move for an individual element of the array. | ||||||
12066 | StmtResult Copy = | ||||||
12067 | buildSingleCopyAssignRecursively(S, Loc, ArrayTy->getElementType(), | ||||||
12068 | ToIndex, *FromIndex, CopyingBaseSubobject, | ||||||
12069 | Copying, Depth + 1); | ||||||
12070 | // Bail out if copying fails or if we determined that we should use memcpy. | ||||||
12071 | if (Copy.isInvalid() || !Copy.get()) | ||||||
12072 | return Copy; | ||||||
12073 | |||||||
12074 | // Create the comparison against the array bound. | ||||||
12075 | llvm::APInt Upper | ||||||
12076 | = ArrayTy->getSize().zextOrTrunc(S.Context.getTypeSize(SizeType)); | ||||||
12077 | Expr *Comparison | ||||||
12078 | = new (S.Context) BinaryOperator(IterationVarRefRVal.build(S, Loc), | ||||||
12079 | IntegerLiteral::Create(S.Context, Upper, SizeType, Loc), | ||||||
12080 | BO_NE, S.Context.BoolTy, | ||||||
12081 | VK_RValue, OK_Ordinary, Loc, FPOptions()); | ||||||
12082 | |||||||
12083 | // Create the pre-increment of the iteration variable. We can determine | ||||||
12084 | // whether the increment will overflow based on the value of the array | ||||||
12085 | // bound. | ||||||
12086 | Expr *Increment = new (S.Context) | ||||||
12087 | UnaryOperator(IterationVarRef.build(S, Loc), UO_PreInc, SizeType, | ||||||
12088 | VK_LValue, OK_Ordinary, Loc, Upper.isMaxValue()); | ||||||
12089 | |||||||
12090 | // Construct the loop that copies all elements of this array. | ||||||
12091 | return S.ActOnForStmt( | ||||||
12092 | Loc, Loc, InitStmt, | ||||||
12093 | S.ActOnCondition(nullptr, Loc, Comparison, Sema::ConditionKind::Boolean), | ||||||
12094 | S.MakeFullDiscardedValueExpr(Increment), Loc, Copy.get()); | ||||||
12095 | } | ||||||
12096 | |||||||
12097 | static StmtResult | ||||||
12098 | buildSingleCopyAssign(Sema &S, SourceLocation Loc, QualType T, | ||||||
12099 | const ExprBuilder &To, const ExprBuilder &From, | ||||||
12100 | bool CopyingBaseSubobject, bool Copying) { | ||||||
12101 | // Maybe we should use a memcpy? | ||||||
12102 | if (T->isArrayType() && !T.isConstQualified() && !T.isVolatileQualified() && | ||||||
12103 | T.isTriviallyCopyableType(S.Context)) | ||||||
12104 | return buildMemcpyForAssignmentOp(S, Loc, T, To, From); | ||||||
12105 | |||||||
12106 | StmtResult Result(buildSingleCopyAssignRecursively(S, Loc, T, To, From, | ||||||
12107 | CopyingBaseSubobject, | ||||||
12108 | Copying, 0)); | ||||||
12109 | |||||||
12110 | // If we ended up picking a trivial assignment operator for an array of a | ||||||
12111 | // non-trivially-copyable class type, just emit a memcpy. | ||||||
12112 | if (!Result.isInvalid() && !Result.get()) | ||||||
12113 | return buildMemcpyForAssignmentOp(S, Loc, T, To, From); | ||||||
12114 | |||||||
12115 | return Result; | ||||||
12116 | } | ||||||
12117 | |||||||
12118 | CXXMethodDecl *Sema::DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl) { | ||||||
12119 | // Note: The following rules are largely analoguous to the copy | ||||||
12120 | // constructor rules. Note that virtual bases are not taken into account | ||||||
12121 | // for determining the argument type of the operator. Note also that | ||||||
12122 | // operators taking an object instead of a reference are allowed. | ||||||
12123 | assert(ClassDecl->needsImplicitCopyAssignment())((ClassDecl->needsImplicitCopyAssignment()) ? static_cast< void> (0) : __assert_fail ("ClassDecl->needsImplicitCopyAssignment()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12123, __PRETTY_FUNCTION__)); | ||||||
12124 | |||||||
12125 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXCopyAssignment); | ||||||
12126 | if (DSM.isAlreadyBeingDeclared()) | ||||||
12127 | return nullptr; | ||||||
12128 | |||||||
12129 | QualType ArgType = Context.getTypeDeclType(ClassDecl); | ||||||
12130 | if (Context.getLangOpts().OpenCLCPlusPlus) | ||||||
12131 | ArgType = Context.getAddrSpaceQualType(ArgType, LangAS::opencl_generic); | ||||||
12132 | QualType RetType = Context.getLValueReferenceType(ArgType); | ||||||
12133 | bool Const = ClassDecl->implicitCopyAssignmentHasConstParam(); | ||||||
12134 | if (Const) | ||||||
12135 | ArgType = ArgType.withConst(); | ||||||
12136 | |||||||
12137 | ArgType = Context.getLValueReferenceType(ArgType); | ||||||
12138 | |||||||
12139 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||
12140 | CXXCopyAssignment, | ||||||
12141 | Const); | ||||||
12142 | |||||||
12143 | // An implicitly-declared copy assignment operator is an inline public | ||||||
12144 | // member of its class. | ||||||
12145 | DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||||
12146 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||
12147 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||
12148 | CXXMethodDecl *CopyAssignment = CXXMethodDecl::Create( | ||||||
12149 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), | ||||||
12150 | /*TInfo=*/nullptr, /*StorageClass=*/SC_None, | ||||||
12151 | /*isInline=*/true, Constexpr ? CSK_constexpr : CSK_unspecified, | ||||||
12152 | SourceLocation()); | ||||||
12153 | CopyAssignment->setAccess(AS_public); | ||||||
12154 | CopyAssignment->setDefaulted(); | ||||||
12155 | CopyAssignment->setImplicit(); | ||||||
12156 | |||||||
12157 | if (getLangOpts().CUDA) { | ||||||
12158 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXCopyAssignment, | ||||||
12159 | CopyAssignment, | ||||||
12160 | /* ConstRHS */ Const, | ||||||
12161 | /* Diagnose */ false); | ||||||
12162 | } | ||||||
12163 | |||||||
12164 | setupImplicitSpecialMemberType(CopyAssignment, RetType, ArgType); | ||||||
12165 | |||||||
12166 | // Add the parameter to the operator. | ||||||
12167 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, CopyAssignment, | ||||||
12168 | ClassLoc, ClassLoc, | ||||||
12169 | /*Id=*/nullptr, ArgType, | ||||||
12170 | /*TInfo=*/nullptr, SC_None, | ||||||
12171 | nullptr); | ||||||
12172 | CopyAssignment->setParams(FromParam); | ||||||
12173 | |||||||
12174 | CopyAssignment->setTrivial( | ||||||
12175 | ClassDecl->needsOverloadResolutionForCopyAssignment() | ||||||
12176 | ? SpecialMemberIsTrivial(CopyAssignment, CXXCopyAssignment) | ||||||
12177 | : ClassDecl->hasTrivialCopyAssignment()); | ||||||
12178 | |||||||
12179 | // Note that we have added this copy-assignment operator. | ||||||
12180 | ++getASTContext().NumImplicitCopyAssignmentOperatorsDeclared; | ||||||
12181 | |||||||
12182 | Scope *S = getScopeForContext(ClassDecl); | ||||||
12183 | CheckImplicitSpecialMemberDeclaration(S, CopyAssignment); | ||||||
12184 | |||||||
12185 | if (ShouldDeleteSpecialMember(CopyAssignment, CXXCopyAssignment)) | ||||||
12186 | SetDeclDeleted(CopyAssignment, ClassLoc); | ||||||
12187 | |||||||
12188 | if (S) | ||||||
12189 | PushOnScopeChains(CopyAssignment, S, false); | ||||||
12190 | ClassDecl->addDecl(CopyAssignment); | ||||||
12191 | |||||||
12192 | return CopyAssignment; | ||||||
12193 | } | ||||||
12194 | |||||||
12195 | /// Diagnose an implicit copy operation for a class which is odr-used, but | ||||||
12196 | /// which is deprecated because the class has a user-declared copy constructor, | ||||||
12197 | /// copy assignment operator, or destructor. | ||||||
12198 | static void diagnoseDeprecatedCopyOperation(Sema &S, CXXMethodDecl *CopyOp) { | ||||||
12199 | assert(CopyOp->isImplicit())((CopyOp->isImplicit()) ? static_cast<void> (0) : __assert_fail ("CopyOp->isImplicit()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12199, __PRETTY_FUNCTION__)); | ||||||
12200 | |||||||
12201 | CXXRecordDecl *RD = CopyOp->getParent(); | ||||||
12202 | CXXMethodDecl *UserDeclaredOperation = nullptr; | ||||||
12203 | |||||||
12204 | // In Microsoft mode, assignment operations don't affect constructors and | ||||||
12205 | // vice versa. | ||||||
12206 | if (RD->hasUserDeclaredDestructor()) { | ||||||
12207 | UserDeclaredOperation = RD->getDestructor(); | ||||||
12208 | } else if (!isa<CXXConstructorDecl>(CopyOp) && | ||||||
12209 | RD->hasUserDeclaredCopyConstructor() && | ||||||
12210 | !S.getLangOpts().MSVCCompat) { | ||||||
12211 | // Find any user-declared copy constructor. | ||||||
12212 | for (auto *I : RD->ctors()) { | ||||||
12213 | if (I->isCopyConstructor()) { | ||||||
12214 | UserDeclaredOperation = I; | ||||||
12215 | break; | ||||||
12216 | } | ||||||
12217 | } | ||||||
12218 | assert(UserDeclaredOperation)((UserDeclaredOperation) ? static_cast<void> (0) : __assert_fail ("UserDeclaredOperation", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12218, __PRETTY_FUNCTION__)); | ||||||
12219 | } else if (isa<CXXConstructorDecl>(CopyOp) && | ||||||
12220 | RD->hasUserDeclaredCopyAssignment() && | ||||||
12221 | !S.getLangOpts().MSVCCompat) { | ||||||
12222 | // Find any user-declared move assignment operator. | ||||||
12223 | for (auto *I : RD->methods()) { | ||||||
12224 | if (I->isCopyAssignmentOperator()) { | ||||||
12225 | UserDeclaredOperation = I; | ||||||
12226 | break; | ||||||
12227 | } | ||||||
12228 | } | ||||||
12229 | assert(UserDeclaredOperation)((UserDeclaredOperation) ? static_cast<void> (0) : __assert_fail ("UserDeclaredOperation", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12229, __PRETTY_FUNCTION__)); | ||||||
12230 | } | ||||||
12231 | |||||||
12232 | if (UserDeclaredOperation) { | ||||||
12233 | S.Diag(UserDeclaredOperation->getLocation(), | ||||||
12234 | diag::warn_deprecated_copy_operation) | ||||||
12235 | << RD << /*copy assignment*/!isa<CXXConstructorDecl>(CopyOp) | ||||||
12236 | << /*destructor*/isa<CXXDestructorDecl>(UserDeclaredOperation); | ||||||
12237 | } | ||||||
12238 | } | ||||||
12239 | |||||||
12240 | void Sema::DefineImplicitCopyAssignment(SourceLocation CurrentLocation, | ||||||
12241 | CXXMethodDecl *CopyAssignOperator) { | ||||||
12242 | assert((CopyAssignOperator->isDefaulted() &&(((CopyAssignOperator->isDefaulted() && CopyAssignOperator ->isOverloadedOperator() && CopyAssignOperator-> getOverloadedOperator() == OO_Equal && !CopyAssignOperator ->doesThisDeclarationHaveABody() && !CopyAssignOperator ->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12247, __PRETTY_FUNCTION__)) | ||||||
12243 | CopyAssignOperator->isOverloadedOperator() &&(((CopyAssignOperator->isDefaulted() && CopyAssignOperator ->isOverloadedOperator() && CopyAssignOperator-> getOverloadedOperator() == OO_Equal && !CopyAssignOperator ->doesThisDeclarationHaveABody() && !CopyAssignOperator ->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12247, __PRETTY_FUNCTION__)) | ||||||
12244 | CopyAssignOperator->getOverloadedOperator() == OO_Equal &&(((CopyAssignOperator->isDefaulted() && CopyAssignOperator ->isOverloadedOperator() && CopyAssignOperator-> getOverloadedOperator() == OO_Equal && !CopyAssignOperator ->doesThisDeclarationHaveABody() && !CopyAssignOperator ->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12247, __PRETTY_FUNCTION__)) | ||||||
12245 | !CopyAssignOperator->doesThisDeclarationHaveABody() &&(((CopyAssignOperator->isDefaulted() && CopyAssignOperator ->isOverloadedOperator() && CopyAssignOperator-> getOverloadedOperator() == OO_Equal && !CopyAssignOperator ->doesThisDeclarationHaveABody() && !CopyAssignOperator ->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12247, __PRETTY_FUNCTION__)) | ||||||
12246 | !CopyAssignOperator->isDeleted()) &&(((CopyAssignOperator->isDefaulted() && CopyAssignOperator ->isOverloadedOperator() && CopyAssignOperator-> getOverloadedOperator() == OO_Equal && !CopyAssignOperator ->doesThisDeclarationHaveABody() && !CopyAssignOperator ->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12247, __PRETTY_FUNCTION__)) | ||||||
12247 | "DefineImplicitCopyAssignment called for wrong function")(((CopyAssignOperator->isDefaulted() && CopyAssignOperator ->isOverloadedOperator() && CopyAssignOperator-> getOverloadedOperator() == OO_Equal && !CopyAssignOperator ->doesThisDeclarationHaveABody() && !CopyAssignOperator ->isDeleted()) && "DefineImplicitCopyAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12247, __PRETTY_FUNCTION__)); | ||||||
12248 | if (CopyAssignOperator->willHaveBody() || CopyAssignOperator->isInvalidDecl()) | ||||||
12249 | return; | ||||||
12250 | |||||||
12251 | CXXRecordDecl *ClassDecl = CopyAssignOperator->getParent(); | ||||||
12252 | if (ClassDecl->isInvalidDecl()) { | ||||||
12253 | CopyAssignOperator->setInvalidDecl(); | ||||||
12254 | return; | ||||||
12255 | } | ||||||
12256 | |||||||
12257 | SynthesizedFunctionScope Scope(*this, CopyAssignOperator); | ||||||
12258 | |||||||
12259 | // The exception specification is needed because we are defining the | ||||||
12260 | // function. | ||||||
12261 | ResolveExceptionSpec(CurrentLocation, | ||||||
12262 | CopyAssignOperator->getType()->castAs<FunctionProtoType>()); | ||||||
12263 | |||||||
12264 | // Add a context note for diagnostics produced after this point. | ||||||
12265 | Scope.addContextNote(CurrentLocation); | ||||||
12266 | |||||||
12267 | // C++11 [class.copy]p18: | ||||||
12268 | // The [definition of an implicitly declared copy assignment operator] is | ||||||
12269 | // deprecated if the class has a user-declared copy constructor or a | ||||||
12270 | // user-declared destructor. | ||||||
12271 | if (getLangOpts().CPlusPlus11 && CopyAssignOperator->isImplicit()) | ||||||
12272 | diagnoseDeprecatedCopyOperation(*this, CopyAssignOperator); | ||||||
12273 | |||||||
12274 | // C++0x [class.copy]p30: | ||||||
12275 | // The implicitly-defined or explicitly-defaulted copy assignment operator | ||||||
12276 | // for a non-union class X performs memberwise copy assignment of its | ||||||
12277 | // subobjects. The direct base classes of X are assigned first, in the | ||||||
12278 | // order of their declaration in the base-specifier-list, and then the | ||||||
12279 | // immediate non-static data members of X are assigned, in the order in | ||||||
12280 | // which they were declared in the class definition. | ||||||
12281 | |||||||
12282 | // The statements that form the synthesized function body. | ||||||
12283 | SmallVector<Stmt*, 8> Statements; | ||||||
12284 | |||||||
12285 | // The parameter for the "other" object, which we are copying from. | ||||||
12286 | ParmVarDecl *Other = CopyAssignOperator->getParamDecl(0); | ||||||
12287 | Qualifiers OtherQuals = Other->getType().getQualifiers(); | ||||||
12288 | QualType OtherRefType = Other->getType(); | ||||||
12289 | if (const LValueReferenceType *OtherRef | ||||||
12290 | = OtherRefType->getAs<LValueReferenceType>()) { | ||||||
12291 | OtherRefType = OtherRef->getPointeeType(); | ||||||
12292 | OtherQuals = OtherRefType.getQualifiers(); | ||||||
12293 | } | ||||||
12294 | |||||||
12295 | // Our location for everything implicitly-generated. | ||||||
12296 | SourceLocation Loc = CopyAssignOperator->getEndLoc().isValid() | ||||||
12297 | ? CopyAssignOperator->getEndLoc() | ||||||
12298 | : CopyAssignOperator->getLocation(); | ||||||
12299 | |||||||
12300 | // Builds a DeclRefExpr for the "other" object. | ||||||
12301 | RefBuilder OtherRef(Other, OtherRefType); | ||||||
12302 | |||||||
12303 | // Builds the "this" pointer. | ||||||
12304 | ThisBuilder This; | ||||||
12305 | |||||||
12306 | // Assign base classes. | ||||||
12307 | bool Invalid = false; | ||||||
12308 | for (auto &Base : ClassDecl->bases()) { | ||||||
12309 | // Form the assignment: | ||||||
12310 | // static_cast<Base*>(this)->Base::operator=(static_cast<Base&>(other)); | ||||||
12311 | QualType BaseType = Base.getType().getUnqualifiedType(); | ||||||
12312 | if (!BaseType->isRecordType()) { | ||||||
12313 | Invalid = true; | ||||||
12314 | continue; | ||||||
12315 | } | ||||||
12316 | |||||||
12317 | CXXCastPath BasePath; | ||||||
12318 | BasePath.push_back(&Base); | ||||||
12319 | |||||||
12320 | // Construct the "from" expression, which is an implicit cast to the | ||||||
12321 | // appropriately-qualified base type. | ||||||
12322 | CastBuilder From(OtherRef, Context.getQualifiedType(BaseType, OtherQuals), | ||||||
12323 | VK_LValue, BasePath); | ||||||
12324 | |||||||
12325 | // Dereference "this". | ||||||
12326 | DerefBuilder DerefThis(This); | ||||||
12327 | CastBuilder To(DerefThis, | ||||||
12328 | Context.getQualifiedType( | ||||||
12329 | BaseType, CopyAssignOperator->getMethodQualifiers()), | ||||||
12330 | VK_LValue, BasePath); | ||||||
12331 | |||||||
12332 | // Build the copy. | ||||||
12333 | StmtResult Copy = buildSingleCopyAssign(*this, Loc, BaseType, | ||||||
12334 | To, From, | ||||||
12335 | /*CopyingBaseSubobject=*/true, | ||||||
12336 | /*Copying=*/true); | ||||||
12337 | if (Copy.isInvalid()) { | ||||||
12338 | CopyAssignOperator->setInvalidDecl(); | ||||||
12339 | return; | ||||||
12340 | } | ||||||
12341 | |||||||
12342 | // Success! Record the copy. | ||||||
12343 | Statements.push_back(Copy.getAs<Expr>()); | ||||||
12344 | } | ||||||
12345 | |||||||
12346 | // Assign non-static members. | ||||||
12347 | for (auto *Field : ClassDecl->fields()) { | ||||||
12348 | // FIXME: We should form some kind of AST representation for the implied | ||||||
12349 | // memcpy in a union copy operation. | ||||||
12350 | if (Field->isUnnamedBitfield() || Field->getParent()->isUnion()) | ||||||
12351 | continue; | ||||||
12352 | |||||||
12353 | if (Field->isInvalidDecl()) { | ||||||
12354 | Invalid = true; | ||||||
12355 | continue; | ||||||
12356 | } | ||||||
12357 | |||||||
12358 | // Check for members of reference type; we can't copy those. | ||||||
12359 | if (Field->getType()->isReferenceType()) { | ||||||
12360 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||||
12361 | << Context.getTagDeclType(ClassDecl) << 0 << Field->getDeclName(); | ||||||
12362 | Diag(Field->getLocation(), diag::note_declared_at); | ||||||
12363 | Invalid = true; | ||||||
12364 | continue; | ||||||
12365 | } | ||||||
12366 | |||||||
12367 | // Check for members of const-qualified, non-class type. | ||||||
12368 | QualType BaseType = Context.getBaseElementType(Field->getType()); | ||||||
12369 | if (!BaseType->getAs<RecordType>() && BaseType.isConstQualified()) { | ||||||
12370 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||||
12371 | << Context.getTagDeclType(ClassDecl) << 1 << Field->getDeclName(); | ||||||
12372 | Diag(Field->getLocation(), diag::note_declared_at); | ||||||
12373 | Invalid = true; | ||||||
12374 | continue; | ||||||
12375 | } | ||||||
12376 | |||||||
12377 | // Suppress assigning zero-width bitfields. | ||||||
12378 | if (Field->isZeroLengthBitField(Context)) | ||||||
12379 | continue; | ||||||
12380 | |||||||
12381 | QualType FieldType = Field->getType().getNonReferenceType(); | ||||||
12382 | if (FieldType->isIncompleteArrayType()) { | ||||||
12383 | assert(ClassDecl->hasFlexibleArrayMember() &&((ClassDecl->hasFlexibleArrayMember() && "Incomplete array type is not valid" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12384, __PRETTY_FUNCTION__)) | ||||||
12384 | "Incomplete array type is not valid")((ClassDecl->hasFlexibleArrayMember() && "Incomplete array type is not valid" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12384, __PRETTY_FUNCTION__)); | ||||||
12385 | continue; | ||||||
12386 | } | ||||||
12387 | |||||||
12388 | // Build references to the field in the object we're copying from and to. | ||||||
12389 | CXXScopeSpec SS; // Intentionally empty | ||||||
12390 | LookupResult MemberLookup(*this, Field->getDeclName(), Loc, | ||||||
12391 | LookupMemberName); | ||||||
12392 | MemberLookup.addDecl(Field); | ||||||
12393 | MemberLookup.resolveKind(); | ||||||
12394 | |||||||
12395 | MemberBuilder From(OtherRef, OtherRefType, /*IsArrow=*/false, MemberLookup); | ||||||
12396 | |||||||
12397 | MemberBuilder To(This, getCurrentThisType(), /*IsArrow=*/true, MemberLookup); | ||||||
12398 | |||||||
12399 | // Build the copy of this field. | ||||||
12400 | StmtResult Copy = buildSingleCopyAssign(*this, Loc, FieldType, | ||||||
12401 | To, From, | ||||||
12402 | /*CopyingBaseSubobject=*/false, | ||||||
12403 | /*Copying=*/true); | ||||||
12404 | if (Copy.isInvalid()) { | ||||||
12405 | CopyAssignOperator->setInvalidDecl(); | ||||||
12406 | return; | ||||||
12407 | } | ||||||
12408 | |||||||
12409 | // Success! Record the copy. | ||||||
12410 | Statements.push_back(Copy.getAs<Stmt>()); | ||||||
12411 | } | ||||||
12412 | |||||||
12413 | if (!Invalid) { | ||||||
12414 | // Add a "return *this;" | ||||||
12415 | ExprResult ThisObj = CreateBuiltinUnaryOp(Loc, UO_Deref, This.build(*this, Loc)); | ||||||
12416 | |||||||
12417 | StmtResult Return = BuildReturnStmt(Loc, ThisObj.get()); | ||||||
12418 | if (Return.isInvalid()) | ||||||
12419 | Invalid = true; | ||||||
12420 | else | ||||||
12421 | Statements.push_back(Return.getAs<Stmt>()); | ||||||
12422 | } | ||||||
12423 | |||||||
12424 | if (Invalid) { | ||||||
12425 | CopyAssignOperator->setInvalidDecl(); | ||||||
12426 | return; | ||||||
12427 | } | ||||||
12428 | |||||||
12429 | StmtResult Body; | ||||||
12430 | { | ||||||
12431 | CompoundScopeRAII CompoundScope(*this); | ||||||
12432 | Body = ActOnCompoundStmt(Loc, Loc, Statements, | ||||||
12433 | /*isStmtExpr=*/false); | ||||||
12434 | assert(!Body.isInvalid() && "Compound statement creation cannot fail")((!Body.isInvalid() && "Compound statement creation cannot fail" ) ? static_cast<void> (0) : __assert_fail ("!Body.isInvalid() && \"Compound statement creation cannot fail\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12434, __PRETTY_FUNCTION__)); | ||||||
12435 | } | ||||||
12436 | CopyAssignOperator->setBody(Body.getAs<Stmt>()); | ||||||
12437 | CopyAssignOperator->markUsed(Context); | ||||||
12438 | |||||||
12439 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
12440 | L->CompletedImplicitDefinition(CopyAssignOperator); | ||||||
12441 | } | ||||||
12442 | } | ||||||
12443 | |||||||
12444 | CXXMethodDecl *Sema::DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl) { | ||||||
12445 | assert(ClassDecl->needsImplicitMoveAssignment())((ClassDecl->needsImplicitMoveAssignment()) ? static_cast< void> (0) : __assert_fail ("ClassDecl->needsImplicitMoveAssignment()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12445, __PRETTY_FUNCTION__)); | ||||||
12446 | |||||||
12447 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXMoveAssignment); | ||||||
12448 | if (DSM.isAlreadyBeingDeclared()) | ||||||
12449 | return nullptr; | ||||||
12450 | |||||||
12451 | // Note: The following rules are largely analoguous to the move | ||||||
12452 | // constructor rules. | ||||||
12453 | |||||||
12454 | QualType ArgType = Context.getTypeDeclType(ClassDecl); | ||||||
12455 | if (Context.getLangOpts().OpenCLCPlusPlus) | ||||||
12456 | ArgType = Context.getAddrSpaceQualType(ArgType, LangAS::opencl_generic); | ||||||
12457 | QualType RetType = Context.getLValueReferenceType(ArgType); | ||||||
12458 | ArgType = Context.getRValueReferenceType(ArgType); | ||||||
12459 | |||||||
12460 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||
12461 | CXXMoveAssignment, | ||||||
12462 | false); | ||||||
12463 | |||||||
12464 | // An implicitly-declared move assignment operator is an inline public | ||||||
12465 | // member of its class. | ||||||
12466 | DeclarationName Name = Context.DeclarationNames.getCXXOperatorName(OO_Equal); | ||||||
12467 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||
12468 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||
12469 | CXXMethodDecl *MoveAssignment = CXXMethodDecl::Create( | ||||||
12470 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), | ||||||
12471 | /*TInfo=*/nullptr, /*StorageClass=*/SC_None, | ||||||
12472 | /*isInline=*/true, Constexpr ? CSK_constexpr : CSK_unspecified, | ||||||
12473 | SourceLocation()); | ||||||
12474 | MoveAssignment->setAccess(AS_public); | ||||||
12475 | MoveAssignment->setDefaulted(); | ||||||
12476 | MoveAssignment->setImplicit(); | ||||||
12477 | |||||||
12478 | if (getLangOpts().CUDA) { | ||||||
12479 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXMoveAssignment, | ||||||
12480 | MoveAssignment, | ||||||
12481 | /* ConstRHS */ false, | ||||||
12482 | /* Diagnose */ false); | ||||||
12483 | } | ||||||
12484 | |||||||
12485 | // Build an exception specification pointing back at this member. | ||||||
12486 | FunctionProtoType::ExtProtoInfo EPI = | ||||||
12487 | getImplicitMethodEPI(*this, MoveAssignment); | ||||||
12488 | MoveAssignment->setType(Context.getFunctionType(RetType, ArgType, EPI)); | ||||||
12489 | |||||||
12490 | // Add the parameter to the operator. | ||||||
12491 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, MoveAssignment, | ||||||
12492 | ClassLoc, ClassLoc, | ||||||
12493 | /*Id=*/nullptr, ArgType, | ||||||
12494 | /*TInfo=*/nullptr, SC_None, | ||||||
12495 | nullptr); | ||||||
12496 | MoveAssignment->setParams(FromParam); | ||||||
12497 | |||||||
12498 | MoveAssignment->setTrivial( | ||||||
12499 | ClassDecl->needsOverloadResolutionForMoveAssignment() | ||||||
12500 | ? SpecialMemberIsTrivial(MoveAssignment, CXXMoveAssignment) | ||||||
12501 | : ClassDecl->hasTrivialMoveAssignment()); | ||||||
12502 | |||||||
12503 | // Note that we have added this copy-assignment operator. | ||||||
12504 | ++getASTContext().NumImplicitMoveAssignmentOperatorsDeclared; | ||||||
12505 | |||||||
12506 | Scope *S = getScopeForContext(ClassDecl); | ||||||
12507 | CheckImplicitSpecialMemberDeclaration(S, MoveAssignment); | ||||||
12508 | |||||||
12509 | if (ShouldDeleteSpecialMember(MoveAssignment, CXXMoveAssignment)) { | ||||||
12510 | ClassDecl->setImplicitMoveAssignmentIsDeleted(); | ||||||
12511 | SetDeclDeleted(MoveAssignment, ClassLoc); | ||||||
12512 | } | ||||||
12513 | |||||||
12514 | if (S) | ||||||
12515 | PushOnScopeChains(MoveAssignment, S, false); | ||||||
12516 | ClassDecl->addDecl(MoveAssignment); | ||||||
12517 | |||||||
12518 | return MoveAssignment; | ||||||
12519 | } | ||||||
12520 | |||||||
12521 | /// Check if we're implicitly defining a move assignment operator for a class | ||||||
12522 | /// with virtual bases. Such a move assignment might move-assign the virtual | ||||||
12523 | /// base multiple times. | ||||||
12524 | static void checkMoveAssignmentForRepeatedMove(Sema &S, CXXRecordDecl *Class, | ||||||
12525 | SourceLocation CurrentLocation) { | ||||||
12526 | assert(!Class->isDependentContext() && "should not define dependent move")((!Class->isDependentContext() && "should not define dependent move" ) ? static_cast<void> (0) : __assert_fail ("!Class->isDependentContext() && \"should not define dependent move\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12526, __PRETTY_FUNCTION__)); | ||||||
12527 | |||||||
12528 | // Only a virtual base could get implicitly move-assigned multiple times. | ||||||
12529 | // Only a non-trivial move assignment can observe this. We only want to | ||||||
12530 | // diagnose if we implicitly define an assignment operator that assigns | ||||||
12531 | // two base classes, both of which move-assign the same virtual base. | ||||||
12532 | if (Class->getNumVBases() == 0 || Class->hasTrivialMoveAssignment() || | ||||||
12533 | Class->getNumBases() < 2) | ||||||
12534 | return; | ||||||
12535 | |||||||
12536 | llvm::SmallVector<CXXBaseSpecifier *, 16> Worklist; | ||||||
12537 | typedef llvm::DenseMap<CXXRecordDecl*, CXXBaseSpecifier*> VBaseMap; | ||||||
12538 | VBaseMap VBases; | ||||||
12539 | |||||||
12540 | for (auto &BI : Class->bases()) { | ||||||
12541 | Worklist.push_back(&BI); | ||||||
12542 | while (!Worklist.empty()) { | ||||||
12543 | CXXBaseSpecifier *BaseSpec = Worklist.pop_back_val(); | ||||||
12544 | CXXRecordDecl *Base = BaseSpec->getType()->getAsCXXRecordDecl(); | ||||||
12545 | |||||||
12546 | // If the base has no non-trivial move assignment operators, | ||||||
12547 | // we don't care about moves from it. | ||||||
12548 | if (!Base->hasNonTrivialMoveAssignment()) | ||||||
12549 | continue; | ||||||
12550 | |||||||
12551 | // If there's nothing virtual here, skip it. | ||||||
12552 | if (!BaseSpec->isVirtual() && !Base->getNumVBases()) | ||||||
12553 | continue; | ||||||
12554 | |||||||
12555 | // If we're not actually going to call a move assignment for this base, | ||||||
12556 | // or the selected move assignment is trivial, skip it. | ||||||
12557 | Sema::SpecialMemberOverloadResult SMOR = | ||||||
12558 | S.LookupSpecialMember(Base, Sema::CXXMoveAssignment, | ||||||
12559 | /*ConstArg*/false, /*VolatileArg*/false, | ||||||
12560 | /*RValueThis*/true, /*ConstThis*/false, | ||||||
12561 | /*VolatileThis*/false); | ||||||
12562 | if (!SMOR.getMethod() || SMOR.getMethod()->isTrivial() || | ||||||
12563 | !SMOR.getMethod()->isMoveAssignmentOperator()) | ||||||
12564 | continue; | ||||||
12565 | |||||||
12566 | if (BaseSpec->isVirtual()) { | ||||||
12567 | // We're going to move-assign this virtual base, and its move | ||||||
12568 | // assignment operator is not trivial. If this can happen for | ||||||
12569 | // multiple distinct direct bases of Class, diagnose it. (If it | ||||||
12570 | // only happens in one base, we'll diagnose it when synthesizing | ||||||
12571 | // that base class's move assignment operator.) | ||||||
12572 | CXXBaseSpecifier *&Existing = | ||||||
12573 | VBases.insert(std::make_pair(Base->getCanonicalDecl(), &BI)) | ||||||
12574 | .first->second; | ||||||
12575 | if (Existing && Existing != &BI) { | ||||||
12576 | S.Diag(CurrentLocation, diag::warn_vbase_moved_multiple_times) | ||||||
12577 | << Class << Base; | ||||||
12578 | S.Diag(Existing->getBeginLoc(), diag::note_vbase_moved_here) | ||||||
12579 | << (Base->getCanonicalDecl() == | ||||||
12580 | Existing->getType()->getAsCXXRecordDecl()->getCanonicalDecl()) | ||||||
12581 | << Base << Existing->getType() << Existing->getSourceRange(); | ||||||
12582 | S.Diag(BI.getBeginLoc(), diag::note_vbase_moved_here) | ||||||
12583 | << (Base->getCanonicalDecl() == | ||||||
12584 | BI.getType()->getAsCXXRecordDecl()->getCanonicalDecl()) | ||||||
12585 | << Base << BI.getType() << BaseSpec->getSourceRange(); | ||||||
12586 | |||||||
12587 | // Only diagnose each vbase once. | ||||||
12588 | Existing = nullptr; | ||||||
12589 | } | ||||||
12590 | } else { | ||||||
12591 | // Only walk over bases that have defaulted move assignment operators. | ||||||
12592 | // We assume that any user-provided move assignment operator handles | ||||||
12593 | // the multiple-moves-of-vbase case itself somehow. | ||||||
12594 | if (!SMOR.getMethod()->isDefaulted()) | ||||||
12595 | continue; | ||||||
12596 | |||||||
12597 | // We're going to move the base classes of Base. Add them to the list. | ||||||
12598 | for (auto &BI : Base->bases()) | ||||||
12599 | Worklist.push_back(&BI); | ||||||
12600 | } | ||||||
12601 | } | ||||||
12602 | } | ||||||
12603 | } | ||||||
12604 | |||||||
12605 | void Sema::DefineImplicitMoveAssignment(SourceLocation CurrentLocation, | ||||||
12606 | CXXMethodDecl *MoveAssignOperator) { | ||||||
12607 | assert((MoveAssignOperator->isDefaulted() &&(((MoveAssignOperator->isDefaulted() && MoveAssignOperator ->isOverloadedOperator() && MoveAssignOperator-> getOverloadedOperator() == OO_Equal && !MoveAssignOperator ->doesThisDeclarationHaveABody() && !MoveAssignOperator ->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12612, __PRETTY_FUNCTION__)) | ||||||
12608 | MoveAssignOperator->isOverloadedOperator() &&(((MoveAssignOperator->isDefaulted() && MoveAssignOperator ->isOverloadedOperator() && MoveAssignOperator-> getOverloadedOperator() == OO_Equal && !MoveAssignOperator ->doesThisDeclarationHaveABody() && !MoveAssignOperator ->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12612, __PRETTY_FUNCTION__)) | ||||||
12609 | MoveAssignOperator->getOverloadedOperator() == OO_Equal &&(((MoveAssignOperator->isDefaulted() && MoveAssignOperator ->isOverloadedOperator() && MoveAssignOperator-> getOverloadedOperator() == OO_Equal && !MoveAssignOperator ->doesThisDeclarationHaveABody() && !MoveAssignOperator ->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12612, __PRETTY_FUNCTION__)) | ||||||
12610 | !MoveAssignOperator->doesThisDeclarationHaveABody() &&(((MoveAssignOperator->isDefaulted() && MoveAssignOperator ->isOverloadedOperator() && MoveAssignOperator-> getOverloadedOperator() == OO_Equal && !MoveAssignOperator ->doesThisDeclarationHaveABody() && !MoveAssignOperator ->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12612, __PRETTY_FUNCTION__)) | ||||||
12611 | !MoveAssignOperator->isDeleted()) &&(((MoveAssignOperator->isDefaulted() && MoveAssignOperator ->isOverloadedOperator() && MoveAssignOperator-> getOverloadedOperator() == OO_Equal && !MoveAssignOperator ->doesThisDeclarationHaveABody() && !MoveAssignOperator ->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12612, __PRETTY_FUNCTION__)) | ||||||
12612 | "DefineImplicitMoveAssignment called for wrong function")(((MoveAssignOperator->isDefaulted() && MoveAssignOperator ->isOverloadedOperator() && MoveAssignOperator-> getOverloadedOperator() == OO_Equal && !MoveAssignOperator ->doesThisDeclarationHaveABody() && !MoveAssignOperator ->isDeleted()) && "DefineImplicitMoveAssignment called for wrong function" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12612, __PRETTY_FUNCTION__)); | ||||||
12613 | if (MoveAssignOperator->willHaveBody() || MoveAssignOperator->isInvalidDecl()) | ||||||
12614 | return; | ||||||
12615 | |||||||
12616 | CXXRecordDecl *ClassDecl = MoveAssignOperator->getParent(); | ||||||
12617 | if (ClassDecl->isInvalidDecl()) { | ||||||
12618 | MoveAssignOperator->setInvalidDecl(); | ||||||
12619 | return; | ||||||
12620 | } | ||||||
12621 | |||||||
12622 | // C++0x [class.copy]p28: | ||||||
12623 | // The implicitly-defined or move assignment operator for a non-union class | ||||||
12624 | // X performs memberwise move assignment of its subobjects. The direct base | ||||||
12625 | // classes of X are assigned first, in the order of their declaration in the | ||||||
12626 | // base-specifier-list, and then the immediate non-static data members of X | ||||||
12627 | // are assigned, in the order in which they were declared in the class | ||||||
12628 | // definition. | ||||||
12629 | |||||||
12630 | // Issue a warning if our implicit move assignment operator will move | ||||||
12631 | // from a virtual base more than once. | ||||||
12632 | checkMoveAssignmentForRepeatedMove(*this, ClassDecl, CurrentLocation); | ||||||
12633 | |||||||
12634 | SynthesizedFunctionScope Scope(*this, MoveAssignOperator); | ||||||
12635 | |||||||
12636 | // The exception specification is needed because we are defining the | ||||||
12637 | // function. | ||||||
12638 | ResolveExceptionSpec(CurrentLocation, | ||||||
12639 | MoveAssignOperator->getType()->castAs<FunctionProtoType>()); | ||||||
12640 | |||||||
12641 | // Add a context note for diagnostics produced after this point. | ||||||
12642 | Scope.addContextNote(CurrentLocation); | ||||||
12643 | |||||||
12644 | // The statements that form the synthesized function body. | ||||||
12645 | SmallVector<Stmt*, 8> Statements; | ||||||
12646 | |||||||
12647 | // The parameter for the "other" object, which we are move from. | ||||||
12648 | ParmVarDecl *Other = MoveAssignOperator->getParamDecl(0); | ||||||
12649 | QualType OtherRefType = Other->getType()-> | ||||||
12650 | getAs<RValueReferenceType>()->getPointeeType(); | ||||||
12651 | |||||||
12652 | // Our location for everything implicitly-generated. | ||||||
12653 | SourceLocation Loc = MoveAssignOperator->getEndLoc().isValid() | ||||||
12654 | ? MoveAssignOperator->getEndLoc() | ||||||
12655 | : MoveAssignOperator->getLocation(); | ||||||
12656 | |||||||
12657 | // Builds a reference to the "other" object. | ||||||
12658 | RefBuilder OtherRef(Other, OtherRefType); | ||||||
12659 | // Cast to rvalue. | ||||||
12660 | MoveCastBuilder MoveOther(OtherRef); | ||||||
12661 | |||||||
12662 | // Builds the "this" pointer. | ||||||
12663 | ThisBuilder This; | ||||||
12664 | |||||||
12665 | // Assign base classes. | ||||||
12666 | bool Invalid = false; | ||||||
12667 | for (auto &Base : ClassDecl->bases()) { | ||||||
12668 | // C++11 [class.copy]p28: | ||||||
12669 | // It is unspecified whether subobjects representing virtual base classes | ||||||
12670 | // are assigned more than once by the implicitly-defined copy assignment | ||||||
12671 | // operator. | ||||||
12672 | // FIXME: Do not assign to a vbase that will be assigned by some other base | ||||||
12673 | // class. For a move-assignment, this can result in the vbase being moved | ||||||
12674 | // multiple times. | ||||||
12675 | |||||||
12676 | // Form the assignment: | ||||||
12677 | // static_cast<Base*>(this)->Base::operator=(static_cast<Base&&>(other)); | ||||||
12678 | QualType BaseType = Base.getType().getUnqualifiedType(); | ||||||
12679 | if (!BaseType->isRecordType()) { | ||||||
12680 | Invalid = true; | ||||||
12681 | continue; | ||||||
12682 | } | ||||||
12683 | |||||||
12684 | CXXCastPath BasePath; | ||||||
12685 | BasePath.push_back(&Base); | ||||||
12686 | |||||||
12687 | // Construct the "from" expression, which is an implicit cast to the | ||||||
12688 | // appropriately-qualified base type. | ||||||
12689 | CastBuilder From(OtherRef, BaseType, VK_XValue, BasePath); | ||||||
12690 | |||||||
12691 | // Dereference "this". | ||||||
12692 | DerefBuilder DerefThis(This); | ||||||
12693 | |||||||
12694 | // Implicitly cast "this" to the appropriately-qualified base type. | ||||||
12695 | CastBuilder To(DerefThis, | ||||||
12696 | Context.getQualifiedType( | ||||||
12697 | BaseType, MoveAssignOperator->getMethodQualifiers()), | ||||||
12698 | VK_LValue, BasePath); | ||||||
12699 | |||||||
12700 | // Build the move. | ||||||
12701 | StmtResult Move = buildSingleCopyAssign(*this, Loc, BaseType, | ||||||
12702 | To, From, | ||||||
12703 | /*CopyingBaseSubobject=*/true, | ||||||
12704 | /*Copying=*/false); | ||||||
12705 | if (Move.isInvalid()) { | ||||||
12706 | MoveAssignOperator->setInvalidDecl(); | ||||||
12707 | return; | ||||||
12708 | } | ||||||
12709 | |||||||
12710 | // Success! Record the move. | ||||||
12711 | Statements.push_back(Move.getAs<Expr>()); | ||||||
12712 | } | ||||||
12713 | |||||||
12714 | // Assign non-static members. | ||||||
12715 | for (auto *Field : ClassDecl->fields()) { | ||||||
12716 | // FIXME: We should form some kind of AST representation for the implied | ||||||
12717 | // memcpy in a union copy operation. | ||||||
12718 | if (Field->isUnnamedBitfield() || Field->getParent()->isUnion()) | ||||||
12719 | continue; | ||||||
12720 | |||||||
12721 | if (Field->isInvalidDecl()) { | ||||||
12722 | Invalid = true; | ||||||
12723 | continue; | ||||||
12724 | } | ||||||
12725 | |||||||
12726 | // Check for members of reference type; we can't move those. | ||||||
12727 | if (Field->getType()->isReferenceType()) { | ||||||
12728 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||||
12729 | << Context.getTagDeclType(ClassDecl) << 0 << Field->getDeclName(); | ||||||
12730 | Diag(Field->getLocation(), diag::note_declared_at); | ||||||
12731 | Invalid = true; | ||||||
12732 | continue; | ||||||
12733 | } | ||||||
12734 | |||||||
12735 | // Check for members of const-qualified, non-class type. | ||||||
12736 | QualType BaseType = Context.getBaseElementType(Field->getType()); | ||||||
12737 | if (!BaseType->getAs<RecordType>() && BaseType.isConstQualified()) { | ||||||
12738 | Diag(ClassDecl->getLocation(), diag::err_uninitialized_member_for_assign) | ||||||
12739 | << Context.getTagDeclType(ClassDecl) << 1 << Field->getDeclName(); | ||||||
12740 | Diag(Field->getLocation(), diag::note_declared_at); | ||||||
12741 | Invalid = true; | ||||||
12742 | continue; | ||||||
12743 | } | ||||||
12744 | |||||||
12745 | // Suppress assigning zero-width bitfields. | ||||||
12746 | if (Field->isZeroLengthBitField(Context)) | ||||||
12747 | continue; | ||||||
12748 | |||||||
12749 | QualType FieldType = Field->getType().getNonReferenceType(); | ||||||
12750 | if (FieldType->isIncompleteArrayType()) { | ||||||
12751 | assert(ClassDecl->hasFlexibleArrayMember() &&((ClassDecl->hasFlexibleArrayMember() && "Incomplete array type is not valid" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12752, __PRETTY_FUNCTION__)) | ||||||
12752 | "Incomplete array type is not valid")((ClassDecl->hasFlexibleArrayMember() && "Incomplete array type is not valid" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl->hasFlexibleArrayMember() && \"Incomplete array type is not valid\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12752, __PRETTY_FUNCTION__)); | ||||||
12753 | continue; | ||||||
12754 | } | ||||||
12755 | |||||||
12756 | // Build references to the field in the object we're copying from and to. | ||||||
12757 | LookupResult MemberLookup(*this, Field->getDeclName(), Loc, | ||||||
12758 | LookupMemberName); | ||||||
12759 | MemberLookup.addDecl(Field); | ||||||
12760 | MemberLookup.resolveKind(); | ||||||
12761 | MemberBuilder From(MoveOther, OtherRefType, | ||||||
12762 | /*IsArrow=*/false, MemberLookup); | ||||||
12763 | MemberBuilder To(This, getCurrentThisType(), | ||||||
12764 | /*IsArrow=*/true, MemberLookup); | ||||||
12765 | |||||||
12766 | assert(!From.build(*this, Loc)->isLValue() && // could be xvalue or prvalue((!From.build(*this, Loc)->isLValue() && "Member reference with rvalue base must be rvalue except for reference " "members, which aren't allowed for move assignment.") ? static_cast <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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12768, __PRETTY_FUNCTION__)) | ||||||
12767 | "Member reference with rvalue base must be rvalue except for reference "((!From.build(*this, Loc)->isLValue() && "Member reference with rvalue base must be rvalue except for reference " "members, which aren't allowed for move assignment.") ? static_cast <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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12768, __PRETTY_FUNCTION__)) | ||||||
12768 | "members, which aren't allowed for move assignment.")((!From.build(*this, Loc)->isLValue() && "Member reference with rvalue base must be rvalue except for reference " "members, which aren't allowed for move assignment.") ? static_cast <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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12768, __PRETTY_FUNCTION__)); | ||||||
12769 | |||||||
12770 | // Build the move of this field. | ||||||
12771 | StmtResult Move = buildSingleCopyAssign(*this, Loc, FieldType, | ||||||
12772 | To, From, | ||||||
12773 | /*CopyingBaseSubobject=*/false, | ||||||
12774 | /*Copying=*/false); | ||||||
12775 | if (Move.isInvalid()) { | ||||||
12776 | MoveAssignOperator->setInvalidDecl(); | ||||||
12777 | return; | ||||||
12778 | } | ||||||
12779 | |||||||
12780 | // Success! Record the copy. | ||||||
12781 | Statements.push_back(Move.getAs<Stmt>()); | ||||||
12782 | } | ||||||
12783 | |||||||
12784 | if (!Invalid) { | ||||||
12785 | // Add a "return *this;" | ||||||
12786 | ExprResult ThisObj = | ||||||
12787 | CreateBuiltinUnaryOp(Loc, UO_Deref, This.build(*this, Loc)); | ||||||
12788 | |||||||
12789 | StmtResult Return = BuildReturnStmt(Loc, ThisObj.get()); | ||||||
12790 | if (Return.isInvalid()) | ||||||
12791 | Invalid = true; | ||||||
12792 | else | ||||||
12793 | Statements.push_back(Return.getAs<Stmt>()); | ||||||
12794 | } | ||||||
12795 | |||||||
12796 | if (Invalid) { | ||||||
12797 | MoveAssignOperator->setInvalidDecl(); | ||||||
12798 | return; | ||||||
12799 | } | ||||||
12800 | |||||||
12801 | StmtResult Body; | ||||||
12802 | { | ||||||
12803 | CompoundScopeRAII CompoundScope(*this); | ||||||
12804 | Body = ActOnCompoundStmt(Loc, Loc, Statements, | ||||||
12805 | /*isStmtExpr=*/false); | ||||||
12806 | assert(!Body.isInvalid() && "Compound statement creation cannot fail")((!Body.isInvalid() && "Compound statement creation cannot fail" ) ? static_cast<void> (0) : __assert_fail ("!Body.isInvalid() && \"Compound statement creation cannot fail\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12806, __PRETTY_FUNCTION__)); | ||||||
12807 | } | ||||||
12808 | MoveAssignOperator->setBody(Body.getAs<Stmt>()); | ||||||
12809 | MoveAssignOperator->markUsed(Context); | ||||||
12810 | |||||||
12811 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
12812 | L->CompletedImplicitDefinition(MoveAssignOperator); | ||||||
12813 | } | ||||||
12814 | } | ||||||
12815 | |||||||
12816 | CXXConstructorDecl *Sema::DeclareImplicitCopyConstructor( | ||||||
12817 | CXXRecordDecl *ClassDecl) { | ||||||
12818 | // C++ [class.copy]p4: | ||||||
12819 | // If the class definition does not explicitly declare a copy | ||||||
12820 | // constructor, one is declared implicitly. | ||||||
12821 | assert(ClassDecl->needsImplicitCopyConstructor())((ClassDecl->needsImplicitCopyConstructor()) ? static_cast <void> (0) : __assert_fail ("ClassDecl->needsImplicitCopyConstructor()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12821, __PRETTY_FUNCTION__)); | ||||||
12822 | |||||||
12823 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXCopyConstructor); | ||||||
12824 | if (DSM.isAlreadyBeingDeclared()) | ||||||
12825 | return nullptr; | ||||||
12826 | |||||||
12827 | QualType ClassType = Context.getTypeDeclType(ClassDecl); | ||||||
12828 | QualType ArgType = ClassType; | ||||||
12829 | bool Const = ClassDecl->implicitCopyConstructorHasConstParam(); | ||||||
12830 | if (Const) | ||||||
12831 | ArgType = ArgType.withConst(); | ||||||
12832 | |||||||
12833 | if (Context.getLangOpts().OpenCLCPlusPlus) | ||||||
12834 | ArgType = Context.getAddrSpaceQualType(ArgType, LangAS::opencl_generic); | ||||||
12835 | |||||||
12836 | ArgType = Context.getLValueReferenceType(ArgType); | ||||||
12837 | |||||||
12838 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||
12839 | CXXCopyConstructor, | ||||||
12840 | Const); | ||||||
12841 | |||||||
12842 | DeclarationName Name | ||||||
12843 | = Context.DeclarationNames.getCXXConstructorName( | ||||||
12844 | Context.getCanonicalType(ClassType)); | ||||||
12845 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||
12846 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||
12847 | |||||||
12848 | // An implicitly-declared copy constructor is an inline public | ||||||
12849 | // member of its class. | ||||||
12850 | CXXConstructorDecl *CopyConstructor = CXXConstructorDecl::Create( | ||||||
12851 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), /*TInfo=*/nullptr, | ||||||
12852 | ExplicitSpecifier(), | ||||||
12853 | /*isInline=*/true, | ||||||
12854 | /*isImplicitlyDeclared=*/true, | ||||||
12855 | Constexpr ? CSK_constexpr : CSK_unspecified); | ||||||
12856 | CopyConstructor->setAccess(AS_public); | ||||||
12857 | CopyConstructor->setDefaulted(); | ||||||
12858 | |||||||
12859 | if (getLangOpts().CUDA) { | ||||||
12860 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXCopyConstructor, | ||||||
12861 | CopyConstructor, | ||||||
12862 | /* ConstRHS */ Const, | ||||||
12863 | /* Diagnose */ false); | ||||||
12864 | } | ||||||
12865 | |||||||
12866 | setupImplicitSpecialMemberType(CopyConstructor, Context.VoidTy, ArgType); | ||||||
12867 | |||||||
12868 | // Add the parameter to the constructor. | ||||||
12869 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, CopyConstructor, | ||||||
12870 | ClassLoc, ClassLoc, | ||||||
12871 | /*IdentifierInfo=*/nullptr, | ||||||
12872 | ArgType, /*TInfo=*/nullptr, | ||||||
12873 | SC_None, nullptr); | ||||||
12874 | CopyConstructor->setParams(FromParam); | ||||||
12875 | |||||||
12876 | CopyConstructor->setTrivial( | ||||||
12877 | ClassDecl->needsOverloadResolutionForCopyConstructor() | ||||||
12878 | ? SpecialMemberIsTrivial(CopyConstructor, CXXCopyConstructor) | ||||||
12879 | : ClassDecl->hasTrivialCopyConstructor()); | ||||||
12880 | |||||||
12881 | CopyConstructor->setTrivialForCall( | ||||||
12882 | ClassDecl->hasAttr<TrivialABIAttr>() || | ||||||
12883 | (ClassDecl->needsOverloadResolutionForCopyConstructor() | ||||||
12884 | ? SpecialMemberIsTrivial(CopyConstructor, CXXCopyConstructor, | ||||||
12885 | TAH_ConsiderTrivialABI) | ||||||
12886 | : ClassDecl->hasTrivialCopyConstructorForCall())); | ||||||
12887 | |||||||
12888 | // Note that we have declared this constructor. | ||||||
12889 | ++getASTContext().NumImplicitCopyConstructorsDeclared; | ||||||
12890 | |||||||
12891 | Scope *S = getScopeForContext(ClassDecl); | ||||||
12892 | CheckImplicitSpecialMemberDeclaration(S, CopyConstructor); | ||||||
12893 | |||||||
12894 | if (ShouldDeleteSpecialMember(CopyConstructor, CXXCopyConstructor)) { | ||||||
12895 | ClassDecl->setImplicitCopyConstructorIsDeleted(); | ||||||
12896 | SetDeclDeleted(CopyConstructor, ClassLoc); | ||||||
12897 | } | ||||||
12898 | |||||||
12899 | if (S) | ||||||
12900 | PushOnScopeChains(CopyConstructor, S, false); | ||||||
12901 | ClassDecl->addDecl(CopyConstructor); | ||||||
12902 | |||||||
12903 | return CopyConstructor; | ||||||
12904 | } | ||||||
12905 | |||||||
12906 | void Sema::DefineImplicitCopyConstructor(SourceLocation CurrentLocation, | ||||||
12907 | CXXConstructorDecl *CopyConstructor) { | ||||||
12908 | assert((CopyConstructor->isDefaulted() &&(((CopyConstructor->isDefaulted() && CopyConstructor ->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody () && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? static_cast<void> (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12912, __PRETTY_FUNCTION__)) | ||||||
12909 | CopyConstructor->isCopyConstructor() &&(((CopyConstructor->isDefaulted() && CopyConstructor ->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody () && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? static_cast<void> (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12912, __PRETTY_FUNCTION__)) | ||||||
12910 | !CopyConstructor->doesThisDeclarationHaveABody() &&(((CopyConstructor->isDefaulted() && CopyConstructor ->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody () && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? static_cast<void> (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12912, __PRETTY_FUNCTION__)) | ||||||
12911 | !CopyConstructor->isDeleted()) &&(((CopyConstructor->isDefaulted() && CopyConstructor ->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody () && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? static_cast<void> (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12912, __PRETTY_FUNCTION__)) | ||||||
12912 | "DefineImplicitCopyConstructor - call it for implicit copy ctor")(((CopyConstructor->isDefaulted() && CopyConstructor ->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody () && !CopyConstructor->isDeleted()) && "DefineImplicitCopyConstructor - call it for implicit copy ctor" ) ? static_cast<void> (0) : __assert_fail ("(CopyConstructor->isDefaulted() && CopyConstructor->isCopyConstructor() && !CopyConstructor->doesThisDeclarationHaveABody() && !CopyConstructor->isDeleted()) && \"DefineImplicitCopyConstructor - call it for implicit copy ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12912, __PRETTY_FUNCTION__)); | ||||||
12913 | if (CopyConstructor->willHaveBody() || CopyConstructor->isInvalidDecl()) | ||||||
12914 | return; | ||||||
12915 | |||||||
12916 | CXXRecordDecl *ClassDecl = CopyConstructor->getParent(); | ||||||
12917 | assert(ClassDecl && "DefineImplicitCopyConstructor - invalid constructor")((ClassDecl && "DefineImplicitCopyConstructor - invalid constructor" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl && \"DefineImplicitCopyConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12917, __PRETTY_FUNCTION__)); | ||||||
12918 | |||||||
12919 | SynthesizedFunctionScope Scope(*this, CopyConstructor); | ||||||
12920 | |||||||
12921 | // The exception specification is needed because we are defining the | ||||||
12922 | // function. | ||||||
12923 | ResolveExceptionSpec(CurrentLocation, | ||||||
12924 | CopyConstructor->getType()->castAs<FunctionProtoType>()); | ||||||
12925 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||
12926 | |||||||
12927 | // Add a context note for diagnostics produced after this point. | ||||||
12928 | Scope.addContextNote(CurrentLocation); | ||||||
12929 | |||||||
12930 | // C++11 [class.copy]p7: | ||||||
12931 | // The [definition of an implicitly declared copy constructor] is | ||||||
12932 | // deprecated if the class has a user-declared copy assignment operator | ||||||
12933 | // or a user-declared destructor. | ||||||
12934 | if (getLangOpts().CPlusPlus11 && CopyConstructor->isImplicit()) | ||||||
12935 | diagnoseDeprecatedCopyOperation(*this, CopyConstructor); | ||||||
12936 | |||||||
12937 | if (SetCtorInitializers(CopyConstructor, /*AnyErrors=*/false)) { | ||||||
12938 | CopyConstructor->setInvalidDecl(); | ||||||
12939 | } else { | ||||||
12940 | SourceLocation Loc = CopyConstructor->getEndLoc().isValid() | ||||||
12941 | ? CopyConstructor->getEndLoc() | ||||||
12942 | : CopyConstructor->getLocation(); | ||||||
12943 | Sema::CompoundScopeRAII CompoundScope(*this); | ||||||
12944 | CopyConstructor->setBody( | ||||||
12945 | ActOnCompoundStmt(Loc, Loc, None, /*isStmtExpr=*/false).getAs<Stmt>()); | ||||||
12946 | CopyConstructor->markUsed(Context); | ||||||
12947 | } | ||||||
12948 | |||||||
12949 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
12950 | L->CompletedImplicitDefinition(CopyConstructor); | ||||||
12951 | } | ||||||
12952 | } | ||||||
12953 | |||||||
12954 | CXXConstructorDecl *Sema::DeclareImplicitMoveConstructor( | ||||||
12955 | CXXRecordDecl *ClassDecl) { | ||||||
12956 | assert(ClassDecl->needsImplicitMoveConstructor())((ClassDecl->needsImplicitMoveConstructor()) ? static_cast <void> (0) : __assert_fail ("ClassDecl->needsImplicitMoveConstructor()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 12956, __PRETTY_FUNCTION__)); | ||||||
12957 | |||||||
12958 | DeclaringSpecialMember DSM(*this, ClassDecl, CXXMoveConstructor); | ||||||
12959 | if (DSM.isAlreadyBeingDeclared()) | ||||||
12960 | return nullptr; | ||||||
12961 | |||||||
12962 | QualType ClassType = Context.getTypeDeclType(ClassDecl); | ||||||
12963 | |||||||
12964 | QualType ArgType = ClassType; | ||||||
12965 | if (Context.getLangOpts().OpenCLCPlusPlus) | ||||||
12966 | ArgType = Context.getAddrSpaceQualType(ClassType, LangAS::opencl_generic); | ||||||
12967 | ArgType = Context.getRValueReferenceType(ArgType); | ||||||
12968 | |||||||
12969 | bool Constexpr = defaultedSpecialMemberIsConstexpr(*this, ClassDecl, | ||||||
12970 | CXXMoveConstructor, | ||||||
12971 | false); | ||||||
12972 | |||||||
12973 | DeclarationName Name | ||||||
12974 | = Context.DeclarationNames.getCXXConstructorName( | ||||||
12975 | Context.getCanonicalType(ClassType)); | ||||||
12976 | SourceLocation ClassLoc = ClassDecl->getLocation(); | ||||||
12977 | DeclarationNameInfo NameInfo(Name, ClassLoc); | ||||||
12978 | |||||||
12979 | // C++11 [class.copy]p11: | ||||||
12980 | // An implicitly-declared copy/move constructor is an inline public | ||||||
12981 | // member of its class. | ||||||
12982 | CXXConstructorDecl *MoveConstructor = CXXConstructorDecl::Create( | ||||||
12983 | Context, ClassDecl, ClassLoc, NameInfo, QualType(), /*TInfo=*/nullptr, | ||||||
12984 | ExplicitSpecifier(), | ||||||
12985 | /*isInline=*/true, | ||||||
12986 | /*isImplicitlyDeclared=*/true, | ||||||
12987 | Constexpr ? CSK_constexpr : CSK_unspecified); | ||||||
12988 | MoveConstructor->setAccess(AS_public); | ||||||
12989 | MoveConstructor->setDefaulted(); | ||||||
12990 | |||||||
12991 | if (getLangOpts().CUDA) { | ||||||
12992 | inferCUDATargetForImplicitSpecialMember(ClassDecl, CXXMoveConstructor, | ||||||
12993 | MoveConstructor, | ||||||
12994 | /* ConstRHS */ false, | ||||||
12995 | /* Diagnose */ false); | ||||||
12996 | } | ||||||
12997 | |||||||
12998 | setupImplicitSpecialMemberType(MoveConstructor, Context.VoidTy, ArgType); | ||||||
12999 | |||||||
13000 | // Add the parameter to the constructor. | ||||||
13001 | ParmVarDecl *FromParam = ParmVarDecl::Create(Context, MoveConstructor, | ||||||
13002 | ClassLoc, ClassLoc, | ||||||
13003 | /*IdentifierInfo=*/nullptr, | ||||||
13004 | ArgType, /*TInfo=*/nullptr, | ||||||
13005 | SC_None, nullptr); | ||||||
13006 | MoveConstructor->setParams(FromParam); | ||||||
13007 | |||||||
13008 | MoveConstructor->setTrivial( | ||||||
13009 | ClassDecl->needsOverloadResolutionForMoveConstructor() | ||||||
13010 | ? SpecialMemberIsTrivial(MoveConstructor, CXXMoveConstructor) | ||||||
13011 | : ClassDecl->hasTrivialMoveConstructor()); | ||||||
13012 | |||||||
13013 | MoveConstructor->setTrivialForCall( | ||||||
13014 | ClassDecl->hasAttr<TrivialABIAttr>() || | ||||||
13015 | (ClassDecl->needsOverloadResolutionForMoveConstructor() | ||||||
13016 | ? SpecialMemberIsTrivial(MoveConstructor, CXXMoveConstructor, | ||||||
13017 | TAH_ConsiderTrivialABI) | ||||||
13018 | : ClassDecl->hasTrivialMoveConstructorForCall())); | ||||||
13019 | |||||||
13020 | // Note that we have declared this constructor. | ||||||
13021 | ++getASTContext().NumImplicitMoveConstructorsDeclared; | ||||||
13022 | |||||||
13023 | Scope *S = getScopeForContext(ClassDecl); | ||||||
13024 | CheckImplicitSpecialMemberDeclaration(S, MoveConstructor); | ||||||
13025 | |||||||
13026 | if (ShouldDeleteSpecialMember(MoveConstructor, CXXMoveConstructor)) { | ||||||
13027 | ClassDecl->setImplicitMoveConstructorIsDeleted(); | ||||||
13028 | SetDeclDeleted(MoveConstructor, ClassLoc); | ||||||
13029 | } | ||||||
13030 | |||||||
13031 | if (S) | ||||||
13032 | PushOnScopeChains(MoveConstructor, S, false); | ||||||
13033 | ClassDecl->addDecl(MoveConstructor); | ||||||
13034 | |||||||
13035 | return MoveConstructor; | ||||||
13036 | } | ||||||
13037 | |||||||
13038 | void Sema::DefineImplicitMoveConstructor(SourceLocation CurrentLocation, | ||||||
13039 | CXXConstructorDecl *MoveConstructor) { | ||||||
13040 | assert((MoveConstructor->isDefaulted() &&(((MoveConstructor->isDefaulted() && MoveConstructor ->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody () && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? static_cast<void> (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13044, __PRETTY_FUNCTION__)) | ||||||
13041 | MoveConstructor->isMoveConstructor() &&(((MoveConstructor->isDefaulted() && MoveConstructor ->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody () && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? static_cast<void> (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13044, __PRETTY_FUNCTION__)) | ||||||
13042 | !MoveConstructor->doesThisDeclarationHaveABody() &&(((MoveConstructor->isDefaulted() && MoveConstructor ->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody () && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? static_cast<void> (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13044, __PRETTY_FUNCTION__)) | ||||||
13043 | !MoveConstructor->isDeleted()) &&(((MoveConstructor->isDefaulted() && MoveConstructor ->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody () && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? static_cast<void> (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13044, __PRETTY_FUNCTION__)) | ||||||
13044 | "DefineImplicitMoveConstructor - call it for implicit move ctor")(((MoveConstructor->isDefaulted() && MoveConstructor ->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody () && !MoveConstructor->isDeleted()) && "DefineImplicitMoveConstructor - call it for implicit move ctor" ) ? static_cast<void> (0) : __assert_fail ("(MoveConstructor->isDefaulted() && MoveConstructor->isMoveConstructor() && !MoveConstructor->doesThisDeclarationHaveABody() && !MoveConstructor->isDeleted()) && \"DefineImplicitMoveConstructor - call it for implicit move ctor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13044, __PRETTY_FUNCTION__)); | ||||||
13045 | if (MoveConstructor->willHaveBody() || MoveConstructor->isInvalidDecl()) | ||||||
13046 | return; | ||||||
13047 | |||||||
13048 | CXXRecordDecl *ClassDecl = MoveConstructor->getParent(); | ||||||
13049 | assert(ClassDecl && "DefineImplicitMoveConstructor - invalid constructor")((ClassDecl && "DefineImplicitMoveConstructor - invalid constructor" ) ? static_cast<void> (0) : __assert_fail ("ClassDecl && \"DefineImplicitMoveConstructor - invalid constructor\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13049, __PRETTY_FUNCTION__)); | ||||||
13050 | |||||||
13051 | SynthesizedFunctionScope Scope(*this, MoveConstructor); | ||||||
13052 | |||||||
13053 | // The exception specification is needed because we are defining the | ||||||
13054 | // function. | ||||||
13055 | ResolveExceptionSpec(CurrentLocation, | ||||||
13056 | MoveConstructor->getType()->castAs<FunctionProtoType>()); | ||||||
13057 | MarkVTableUsed(CurrentLocation, ClassDecl); | ||||||
13058 | |||||||
13059 | // Add a context note for diagnostics produced after this point. | ||||||
13060 | Scope.addContextNote(CurrentLocation); | ||||||
13061 | |||||||
13062 | if (SetCtorInitializers(MoveConstructor, /*AnyErrors=*/false)) { | ||||||
13063 | MoveConstructor->setInvalidDecl(); | ||||||
13064 | } else { | ||||||
13065 | SourceLocation Loc = MoveConstructor->getEndLoc().isValid() | ||||||
13066 | ? MoveConstructor->getEndLoc() | ||||||
13067 | : MoveConstructor->getLocation(); | ||||||
13068 | Sema::CompoundScopeRAII CompoundScope(*this); | ||||||
13069 | MoveConstructor->setBody(ActOnCompoundStmt( | ||||||
13070 | Loc, Loc, None, /*isStmtExpr=*/ false).getAs<Stmt>()); | ||||||
13071 | MoveConstructor->markUsed(Context); | ||||||
13072 | } | ||||||
13073 | |||||||
13074 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
13075 | L->CompletedImplicitDefinition(MoveConstructor); | ||||||
13076 | } | ||||||
13077 | } | ||||||
13078 | |||||||
13079 | bool Sema::isImplicitlyDeleted(FunctionDecl *FD) { | ||||||
13080 | return FD->isDeleted() && FD->isDefaulted() && isa<CXXMethodDecl>(FD); | ||||||
13081 | } | ||||||
13082 | |||||||
13083 | void Sema::DefineImplicitLambdaToFunctionPointerConversion( | ||||||
13084 | SourceLocation CurrentLocation, | ||||||
13085 | CXXConversionDecl *Conv) { | ||||||
13086 | SynthesizedFunctionScope Scope(*this, Conv); | ||||||
13087 | assert(!Conv->getReturnType()->isUndeducedType())((!Conv->getReturnType()->isUndeducedType()) ? static_cast <void> (0) : __assert_fail ("!Conv->getReturnType()->isUndeducedType()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13087, __PRETTY_FUNCTION__)); | ||||||
13088 | |||||||
13089 | CXXRecordDecl *Lambda = Conv->getParent(); | ||||||
13090 | FunctionDecl *CallOp = Lambda->getLambdaCallOperator(); | ||||||
13091 | FunctionDecl *Invoker = Lambda->getLambdaStaticInvoker(); | ||||||
13092 | |||||||
13093 | if (auto *TemplateArgs = Conv->getTemplateSpecializationArgs()) { | ||||||
13094 | CallOp = InstantiateFunctionDeclaration( | ||||||
13095 | CallOp->getDescribedFunctionTemplate(), TemplateArgs, CurrentLocation); | ||||||
13096 | if (!CallOp) | ||||||
13097 | return; | ||||||
13098 | |||||||
13099 | Invoker = InstantiateFunctionDeclaration( | ||||||
13100 | Invoker->getDescribedFunctionTemplate(), TemplateArgs, CurrentLocation); | ||||||
13101 | if (!Invoker) | ||||||
13102 | return; | ||||||
13103 | } | ||||||
13104 | |||||||
13105 | if (CallOp->isInvalidDecl()) | ||||||
13106 | return; | ||||||
13107 | |||||||
13108 | // Mark the call operator referenced (and add to pending instantiations | ||||||
13109 | // if necessary). | ||||||
13110 | // For both the conversion and static-invoker template specializations | ||||||
13111 | // we construct their body's in this function, so no need to add them | ||||||
13112 | // to the PendingInstantiations. | ||||||
13113 | MarkFunctionReferenced(CurrentLocation, CallOp); | ||||||
13114 | |||||||
13115 | // Fill in the __invoke function with a dummy implementation. IR generation | ||||||
13116 | // will fill in the actual details. Update its type in case it contained | ||||||
13117 | // an 'auto'. | ||||||
13118 | Invoker->markUsed(Context); | ||||||
13119 | Invoker->setReferenced(); | ||||||
13120 | Invoker->setType(Conv->getReturnType()->getPointeeType()); | ||||||
13121 | Invoker->setBody(new (Context) CompoundStmt(Conv->getLocation())); | ||||||
13122 | |||||||
13123 | // Construct the body of the conversion function { return __invoke; }. | ||||||
13124 | Expr *FunctionRef = BuildDeclRefExpr(Invoker, Invoker->getType(), | ||||||
13125 | VK_LValue, Conv->getLocation()); | ||||||
13126 | assert(FunctionRef && "Can't refer to __invoke function?")((FunctionRef && "Can't refer to __invoke function?") ? static_cast<void> (0) : __assert_fail ("FunctionRef && \"Can't refer to __invoke function?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13126, __PRETTY_FUNCTION__)); | ||||||
13127 | Stmt *Return = BuildReturnStmt(Conv->getLocation(), FunctionRef).get(); | ||||||
13128 | Conv->setBody(CompoundStmt::Create(Context, Return, Conv->getLocation(), | ||||||
13129 | Conv->getLocation())); | ||||||
13130 | Conv->markUsed(Context); | ||||||
13131 | Conv->setReferenced(); | ||||||
13132 | |||||||
13133 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
13134 | L->CompletedImplicitDefinition(Conv); | ||||||
13135 | L->CompletedImplicitDefinition(Invoker); | ||||||
13136 | } | ||||||
13137 | } | ||||||
13138 | |||||||
13139 | |||||||
13140 | |||||||
13141 | void Sema::DefineImplicitLambdaToBlockPointerConversion( | ||||||
13142 | SourceLocation CurrentLocation, | ||||||
13143 | CXXConversionDecl *Conv) | ||||||
13144 | { | ||||||
13145 | assert(!Conv->getParent()->isGenericLambda())((!Conv->getParent()->isGenericLambda()) ? static_cast< void> (0) : __assert_fail ("!Conv->getParent()->isGenericLambda()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13145, __PRETTY_FUNCTION__)); | ||||||
13146 | |||||||
13147 | SynthesizedFunctionScope Scope(*this, Conv); | ||||||
13148 | |||||||
13149 | // Copy-initialize the lambda object as needed to capture it. | ||||||
13150 | Expr *This = ActOnCXXThis(CurrentLocation).get(); | ||||||
13151 | Expr *DerefThis =CreateBuiltinUnaryOp(CurrentLocation, UO_Deref, This).get(); | ||||||
13152 | |||||||
13153 | ExprResult BuildBlock = BuildBlockForLambdaConversion(CurrentLocation, | ||||||
13154 | Conv->getLocation(), | ||||||
13155 | Conv, DerefThis); | ||||||
13156 | |||||||
13157 | // If we're not under ARC, make sure we still get the _Block_copy/autorelease | ||||||
13158 | // behavior. Note that only the general conversion function does this | ||||||
13159 | // (since it's unusable otherwise); in the case where we inline the | ||||||
13160 | // block literal, it has block literal lifetime semantics. | ||||||
13161 | if (!BuildBlock.isInvalid() && !getLangOpts().ObjCAutoRefCount) | ||||||
13162 | BuildBlock = ImplicitCastExpr::Create(Context, BuildBlock.get()->getType(), | ||||||
13163 | CK_CopyAndAutoreleaseBlockObject, | ||||||
13164 | BuildBlock.get(), nullptr, VK_RValue); | ||||||
13165 | |||||||
13166 | if (BuildBlock.isInvalid()) { | ||||||
13167 | Diag(CurrentLocation, diag::note_lambda_to_block_conv); | ||||||
13168 | Conv->setInvalidDecl(); | ||||||
13169 | return; | ||||||
13170 | } | ||||||
13171 | |||||||
13172 | // Create the return statement that returns the block from the conversion | ||||||
13173 | // function. | ||||||
13174 | StmtResult Return = BuildReturnStmt(Conv->getLocation(), BuildBlock.get()); | ||||||
13175 | if (Return.isInvalid()) { | ||||||
13176 | Diag(CurrentLocation, diag::note_lambda_to_block_conv); | ||||||
13177 | Conv->setInvalidDecl(); | ||||||
13178 | return; | ||||||
13179 | } | ||||||
13180 | |||||||
13181 | // Set the body of the conversion function. | ||||||
13182 | Stmt *ReturnS = Return.get(); | ||||||
13183 | Conv->setBody(CompoundStmt::Create(Context, ReturnS, Conv->getLocation(), | ||||||
13184 | Conv->getLocation())); | ||||||
13185 | Conv->markUsed(Context); | ||||||
13186 | |||||||
13187 | // We're done; notify the mutation listener, if any. | ||||||
13188 | if (ASTMutationListener *L = getASTMutationListener()) { | ||||||
13189 | L->CompletedImplicitDefinition(Conv); | ||||||
13190 | } | ||||||
13191 | } | ||||||
13192 | |||||||
13193 | /// Determine whether the given list arguments contains exactly one | ||||||
13194 | /// "real" (non-default) argument. | ||||||
13195 | static bool hasOneRealArgument(MultiExprArg Args) { | ||||||
13196 | switch (Args.size()) { | ||||||
13197 | case 0: | ||||||
13198 | return false; | ||||||
13199 | |||||||
13200 | default: | ||||||
13201 | if (!Args[1]->isDefaultArgument()) | ||||||
13202 | return false; | ||||||
13203 | |||||||
13204 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
13205 | case 1: | ||||||
13206 | return !Args[0]->isDefaultArgument(); | ||||||
13207 | } | ||||||
13208 | |||||||
13209 | return false; | ||||||
13210 | } | ||||||
13211 | |||||||
13212 | ExprResult | ||||||
13213 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||||
13214 | NamedDecl *FoundDecl, | ||||||
13215 | CXXConstructorDecl *Constructor, | ||||||
13216 | MultiExprArg ExprArgs, | ||||||
13217 | bool HadMultipleCandidates, | ||||||
13218 | bool IsListInitialization, | ||||||
13219 | bool IsStdInitListInitialization, | ||||||
13220 | bool RequiresZeroInit, | ||||||
13221 | unsigned ConstructKind, | ||||||
13222 | SourceRange ParenRange) { | ||||||
13223 | bool Elidable = false; | ||||||
13224 | |||||||
13225 | // C++0x [class.copy]p34: | ||||||
13226 | // When certain criteria are met, an implementation is allowed to | ||||||
13227 | // omit the copy/move construction of a class object, even if the | ||||||
13228 | // copy/move constructor and/or destructor for the object have | ||||||
13229 | // side effects. [...] | ||||||
13230 | // - when a temporary class object that has not been bound to a | ||||||
13231 | // reference (12.2) would be copied/moved to a class object | ||||||
13232 | // with the same cv-unqualified type, the copy/move operation | ||||||
13233 | // can be omitted by constructing the temporary object | ||||||
13234 | // directly into the target of the omitted copy/move | ||||||
13235 | if (ConstructKind == CXXConstructExpr::CK_Complete && Constructor && | ||||||
13236 | Constructor->isCopyOrMoveConstructor() && hasOneRealArgument(ExprArgs)) { | ||||||
13237 | Expr *SubExpr = ExprArgs[0]; | ||||||
13238 | Elidable = SubExpr->isTemporaryObject( | ||||||
13239 | Context, cast<CXXRecordDecl>(FoundDecl->getDeclContext())); | ||||||
13240 | } | ||||||
13241 | |||||||
13242 | return BuildCXXConstructExpr(ConstructLoc, DeclInitType, | ||||||
13243 | FoundDecl, Constructor, | ||||||
13244 | Elidable, ExprArgs, HadMultipleCandidates, | ||||||
13245 | IsListInitialization, | ||||||
13246 | IsStdInitListInitialization, RequiresZeroInit, | ||||||
13247 | ConstructKind, ParenRange); | ||||||
13248 | } | ||||||
13249 | |||||||
13250 | ExprResult | ||||||
13251 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||||
13252 | NamedDecl *FoundDecl, | ||||||
13253 | CXXConstructorDecl *Constructor, | ||||||
13254 | bool Elidable, | ||||||
13255 | MultiExprArg ExprArgs, | ||||||
13256 | bool HadMultipleCandidates, | ||||||
13257 | bool IsListInitialization, | ||||||
13258 | bool IsStdInitListInitialization, | ||||||
13259 | bool RequiresZeroInit, | ||||||
13260 | unsigned ConstructKind, | ||||||
13261 | SourceRange ParenRange) { | ||||||
13262 | if (auto *Shadow = dyn_cast<ConstructorUsingShadowDecl>(FoundDecl)) { | ||||||
13263 | Constructor = findInheritingConstructor(ConstructLoc, Constructor, Shadow); | ||||||
13264 | if (DiagnoseUseOfDecl(Constructor, ConstructLoc)) | ||||||
13265 | return ExprError(); | ||||||
13266 | } | ||||||
13267 | |||||||
13268 | return BuildCXXConstructExpr( | ||||||
13269 | ConstructLoc, DeclInitType, Constructor, Elidable, ExprArgs, | ||||||
13270 | HadMultipleCandidates, IsListInitialization, IsStdInitListInitialization, | ||||||
13271 | RequiresZeroInit, ConstructKind, ParenRange); | ||||||
13272 | } | ||||||
13273 | |||||||
13274 | /// BuildCXXConstructExpr - Creates a complete call to a constructor, | ||||||
13275 | /// including handling of its default argument expressions. | ||||||
13276 | ExprResult | ||||||
13277 | Sema::BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, | ||||||
13278 | CXXConstructorDecl *Constructor, | ||||||
13279 | bool Elidable, | ||||||
13280 | MultiExprArg ExprArgs, | ||||||
13281 | bool HadMultipleCandidates, | ||||||
13282 | bool IsListInitialization, | ||||||
13283 | bool IsStdInitListInitialization, | ||||||
13284 | bool RequiresZeroInit, | ||||||
13285 | unsigned ConstructKind, | ||||||
13286 | SourceRange ParenRange) { | ||||||
13287 | assert(declaresSameEntity(((declaresSameEntity( Constructor->getParent(), DeclInitType ->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && "given constructor for wrong type") ? static_cast<void> (0) : __assert_fail ("declaresSameEntity( Constructor->getParent(), DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && \"given constructor for wrong type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13290, __PRETTY_FUNCTION__)) | ||||||
13288 | Constructor->getParent(),((declaresSameEntity( Constructor->getParent(), DeclInitType ->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && "given constructor for wrong type") ? static_cast<void> (0) : __assert_fail ("declaresSameEntity( Constructor->getParent(), DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && \"given constructor for wrong type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13290, __PRETTY_FUNCTION__)) | ||||||
13289 | DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) &&((declaresSameEntity( Constructor->getParent(), DeclInitType ->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && "given constructor for wrong type") ? static_cast<void> (0) : __assert_fail ("declaresSameEntity( Constructor->getParent(), DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && \"given constructor for wrong type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13290, __PRETTY_FUNCTION__)) | ||||||
13290 | "given constructor for wrong type")((declaresSameEntity( Constructor->getParent(), DeclInitType ->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && "given constructor for wrong type") ? static_cast<void> (0) : __assert_fail ("declaresSameEntity( Constructor->getParent(), DeclInitType->getBaseElementTypeUnsafe()->getAsCXXRecordDecl()) && \"given constructor for wrong type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13290, __PRETTY_FUNCTION__)); | ||||||
13291 | MarkFunctionReferenced(ConstructLoc, Constructor); | ||||||
13292 | if (getLangOpts().CUDA && !CheckCUDACall(ConstructLoc, Constructor)) | ||||||
13293 | return ExprError(); | ||||||
13294 | |||||||
13295 | return CXXConstructExpr::Create( | ||||||
13296 | Context, DeclInitType, ConstructLoc, Constructor, Elidable, | ||||||
13297 | ExprArgs, HadMultipleCandidates, IsListInitialization, | ||||||
13298 | IsStdInitListInitialization, RequiresZeroInit, | ||||||
13299 | static_cast<CXXConstructExpr::ConstructionKind>(ConstructKind), | ||||||
13300 | ParenRange); | ||||||
13301 | } | ||||||
13302 | |||||||
13303 | ExprResult Sema::BuildCXXDefaultInitExpr(SourceLocation Loc, FieldDecl *Field) { | ||||||
13304 | assert(Field->hasInClassInitializer())((Field->hasInClassInitializer()) ? static_cast<void> (0) : __assert_fail ("Field->hasInClassInitializer()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13304, __PRETTY_FUNCTION__)); | ||||||
13305 | |||||||
13306 | // If we already have the in-class initializer nothing needs to be done. | ||||||
13307 | if (Field->getInClassInitializer()) | ||||||
13308 | return CXXDefaultInitExpr::Create(Context, Loc, Field, CurContext); | ||||||
13309 | |||||||
13310 | // If we might have already tried and failed to instantiate, don't try again. | ||||||
13311 | if (Field->isInvalidDecl()) | ||||||
13312 | return ExprError(); | ||||||
13313 | |||||||
13314 | // Maybe we haven't instantiated the in-class initializer. Go check the | ||||||
13315 | // pattern FieldDecl to see if it has one. | ||||||
13316 | CXXRecordDecl *ParentRD = cast<CXXRecordDecl>(Field->getParent()); | ||||||
13317 | |||||||
13318 | if (isTemplateInstantiation(ParentRD->getTemplateSpecializationKind())) { | ||||||
13319 | CXXRecordDecl *ClassPattern = ParentRD->getTemplateInstantiationPattern(); | ||||||
13320 | DeclContext::lookup_result Lookup = | ||||||
13321 | ClassPattern->lookup(Field->getDeclName()); | ||||||
13322 | |||||||
13323 | // Lookup can return at most two results: the pattern for the field, or the | ||||||
13324 | // injected class name of the parent record. No other member can have the | ||||||
13325 | // same name as the field. | ||||||
13326 | // In modules mode, lookup can return multiple results (coming from | ||||||
13327 | // different modules). | ||||||
13328 | assert((getLangOpts().Modules || (!Lookup.empty() && Lookup.size() <= 2)) &&(((getLangOpts().Modules || (!Lookup.empty() && Lookup .size() <= 2)) && "more than two lookup results for field name" ) ? static_cast<void> (0) : __assert_fail ("(getLangOpts().Modules || (!Lookup.empty() && Lookup.size() <= 2)) && \"more than two lookup results for field name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13329, __PRETTY_FUNCTION__)) | ||||||
13329 | "more than two lookup results for field name")(((getLangOpts().Modules || (!Lookup.empty() && Lookup .size() <= 2)) && "more than two lookup results for field name" ) ? static_cast<void> (0) : __assert_fail ("(getLangOpts().Modules || (!Lookup.empty() && Lookup.size() <= 2)) && \"more than two lookup results for field name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13329, __PRETTY_FUNCTION__)); | ||||||
13330 | FieldDecl *Pattern = dyn_cast<FieldDecl>(Lookup[0]); | ||||||
13331 | if (!Pattern) { | ||||||
13332 | assert(isa<CXXRecordDecl>(Lookup[0]) &&((isa<CXXRecordDecl>(Lookup[0]) && "cannot have other non-field member with same name" ) ? static_cast<void> (0) : __assert_fail ("isa<CXXRecordDecl>(Lookup[0]) && \"cannot have other non-field member with same name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13333, __PRETTY_FUNCTION__)) | ||||||
13333 | "cannot have other non-field member with same name")((isa<CXXRecordDecl>(Lookup[0]) && "cannot have other non-field member with same name" ) ? static_cast<void> (0) : __assert_fail ("isa<CXXRecordDecl>(Lookup[0]) && \"cannot have other non-field member with same name\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13333, __PRETTY_FUNCTION__)); | ||||||
13334 | for (auto L : Lookup) | ||||||
13335 | if (isa<FieldDecl>(L)) { | ||||||
13336 | Pattern = cast<FieldDecl>(L); | ||||||
13337 | break; | ||||||
13338 | } | ||||||
13339 | assert(Pattern && "We must have set the Pattern!")((Pattern && "We must have set the Pattern!") ? static_cast <void> (0) : __assert_fail ("Pattern && \"We must have set the Pattern!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13339, __PRETTY_FUNCTION__)); | ||||||
13340 | } | ||||||
13341 | |||||||
13342 | if (!Pattern->hasInClassInitializer() || | ||||||
13343 | InstantiateInClassInitializer(Loc, Field, Pattern, | ||||||
13344 | getTemplateInstantiationArgs(Field))) { | ||||||
13345 | // Don't diagnose this again. | ||||||
13346 | Field->setInvalidDecl(); | ||||||
13347 | return ExprError(); | ||||||
13348 | } | ||||||
13349 | return CXXDefaultInitExpr::Create(Context, Loc, Field, CurContext); | ||||||
13350 | } | ||||||
13351 | |||||||
13352 | // DR1351: | ||||||
13353 | // If the brace-or-equal-initializer of a non-static data member | ||||||
13354 | // invokes a defaulted default constructor of its class or of an | ||||||
13355 | // enclosing class in a potentially evaluated subexpression, the | ||||||
13356 | // program is ill-formed. | ||||||
13357 | // | ||||||
13358 | // This resolution is unworkable: the exception specification of the | ||||||
13359 | // default constructor can be needed in an unevaluated context, in | ||||||
13360 | // particular, in the operand of a noexcept-expression, and we can be | ||||||
13361 | // unable to compute an exception specification for an enclosed class. | ||||||
13362 | // | ||||||
13363 | // Any attempt to resolve the exception specification of a defaulted default | ||||||
13364 | // constructor before the initializer is lexically complete will ultimately | ||||||
13365 | // come here at which point we can diagnose it. | ||||||
13366 | RecordDecl *OutermostClass = ParentRD->getOuterLexicalRecordContext(); | ||||||
13367 | Diag(Loc, diag::err_in_class_initializer_not_yet_parsed) | ||||||
13368 | << OutermostClass << Field; | ||||||
13369 | Diag(Field->getEndLoc(), diag::note_in_class_initializer_not_yet_parsed); | ||||||
13370 | // Recover by marking the field invalid, unless we're in a SFINAE context. | ||||||
13371 | if (!isSFINAEContext()) | ||||||
13372 | Field->setInvalidDecl(); | ||||||
13373 | return ExprError(); | ||||||
13374 | } | ||||||
13375 | |||||||
13376 | void Sema::FinalizeVarWithDestructor(VarDecl *VD, const RecordType *Record) { | ||||||
13377 | if (VD->isInvalidDecl()) return; | ||||||
13378 | |||||||
13379 | CXXRecordDecl *ClassDecl = cast<CXXRecordDecl>(Record->getDecl()); | ||||||
13380 | if (ClassDecl->isInvalidDecl()) return; | ||||||
13381 | if (ClassDecl->hasIrrelevantDestructor()) return; | ||||||
13382 | if (ClassDecl->isDependentContext()) return; | ||||||
13383 | |||||||
13384 | if (VD->isNoDestroy(getASTContext())) | ||||||
13385 | return; | ||||||
13386 | |||||||
13387 | CXXDestructorDecl *Destructor = LookupDestructor(ClassDecl); | ||||||
13388 | |||||||
13389 | // If this is an array, we'll require the destructor during initialization, so | ||||||
13390 | // we can skip over this. We still want to emit exit-time destructor warnings | ||||||
13391 | // though. | ||||||
13392 | if (!VD->getType()->isArrayType()) { | ||||||
13393 | MarkFunctionReferenced(VD->getLocation(), Destructor); | ||||||
13394 | CheckDestructorAccess(VD->getLocation(), Destructor, | ||||||
13395 | PDiag(diag::err_access_dtor_var) | ||||||
13396 | << VD->getDeclName() << VD->getType()); | ||||||
13397 | DiagnoseUseOfDecl(Destructor, VD->getLocation()); | ||||||
13398 | } | ||||||
13399 | |||||||
13400 | if (Destructor->isTrivial()) return; | ||||||
13401 | |||||||
13402 | // If the destructor is constexpr, check whether the variable has constant | ||||||
13403 | // destruction now. | ||||||
13404 | if (Destructor->isConstexpr() && VD->getInit() && | ||||||
13405 | !VD->getInit()->isValueDependent() && VD->evaluateValue()) { | ||||||
13406 | SmallVector<PartialDiagnosticAt, 8> Notes; | ||||||
13407 | if (!VD->evaluateDestruction(Notes) && VD->isConstexpr()) { | ||||||
13408 | Diag(VD->getLocation(), | ||||||
13409 | diag::err_constexpr_var_requires_const_destruction) << VD; | ||||||
13410 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) | ||||||
13411 | Diag(Notes[I].first, Notes[I].second); | ||||||
13412 | } | ||||||
13413 | } | ||||||
13414 | |||||||
13415 | if (!VD->hasGlobalStorage()) return; | ||||||
13416 | |||||||
13417 | // Emit warning for non-trivial dtor in global scope (a real global, | ||||||
13418 | // class-static, function-static). | ||||||
13419 | Diag(VD->getLocation(), diag::warn_exit_time_destructor); | ||||||
13420 | |||||||
13421 | // TODO: this should be re-enabled for static locals by !CXAAtExit | ||||||
13422 | if (!VD->isStaticLocal()) | ||||||
13423 | Diag(VD->getLocation(), diag::warn_global_destructor); | ||||||
13424 | } | ||||||
13425 | |||||||
13426 | /// Given a constructor and the set of arguments provided for the | ||||||
13427 | /// constructor, convert the arguments and add any required default arguments | ||||||
13428 | /// to form a proper call to this constructor. | ||||||
13429 | /// | ||||||
13430 | /// \returns true if an error occurred, false otherwise. | ||||||
13431 | bool | ||||||
13432 | Sema::CompleteConstructorCall(CXXConstructorDecl *Constructor, | ||||||
13433 | MultiExprArg ArgsPtr, | ||||||
13434 | SourceLocation Loc, | ||||||
13435 | SmallVectorImpl<Expr*> &ConvertedArgs, | ||||||
13436 | bool AllowExplicit, | ||||||
13437 | bool IsListInitialization) { | ||||||
13438 | // FIXME: This duplicates a lot of code from Sema::ConvertArgumentsForCall. | ||||||
13439 | unsigned NumArgs = ArgsPtr.size(); | ||||||
13440 | Expr **Args = ArgsPtr.data(); | ||||||
13441 | |||||||
13442 | const FunctionProtoType *Proto | ||||||
13443 | = Constructor->getType()->getAs<FunctionProtoType>(); | ||||||
13444 | assert(Proto && "Constructor without a prototype?")((Proto && "Constructor without a prototype?") ? static_cast <void> (0) : __assert_fail ("Proto && \"Constructor without a prototype?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13444, __PRETTY_FUNCTION__)); | ||||||
13445 | unsigned NumParams = Proto->getNumParams(); | ||||||
13446 | |||||||
13447 | // If too few arguments are available, we'll fill in the rest with defaults. | ||||||
13448 | if (NumArgs < NumParams) | ||||||
13449 | ConvertedArgs.reserve(NumParams); | ||||||
13450 | else | ||||||
13451 | ConvertedArgs.reserve(NumArgs); | ||||||
13452 | |||||||
13453 | VariadicCallType CallType = | ||||||
13454 | Proto->isVariadic() ? VariadicConstructor : VariadicDoesNotApply; | ||||||
13455 | SmallVector<Expr *, 8> AllArgs; | ||||||
13456 | bool Invalid = GatherArgumentsForCall(Loc, Constructor, | ||||||
13457 | Proto, 0, | ||||||
13458 | llvm::makeArrayRef(Args, NumArgs), | ||||||
13459 | AllArgs, | ||||||
13460 | CallType, AllowExplicit, | ||||||
13461 | IsListInitialization); | ||||||
13462 | ConvertedArgs.append(AllArgs.begin(), AllArgs.end()); | ||||||
13463 | |||||||
13464 | DiagnoseSentinelCalls(Constructor, Loc, AllArgs); | ||||||
13465 | |||||||
13466 | CheckConstructorCall(Constructor, | ||||||
13467 | llvm::makeArrayRef(AllArgs.data(), AllArgs.size()), | ||||||
13468 | Proto, Loc); | ||||||
13469 | |||||||
13470 | return Invalid; | ||||||
13471 | } | ||||||
13472 | |||||||
13473 | static inline bool | ||||||
13474 | CheckOperatorNewDeleteDeclarationScope(Sema &SemaRef, | ||||||
13475 | const FunctionDecl *FnDecl) { | ||||||
13476 | const DeclContext *DC = FnDecl->getDeclContext()->getRedeclContext(); | ||||||
13477 | if (isa<NamespaceDecl>(DC)) { | ||||||
13478 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||
13479 | diag::err_operator_new_delete_declared_in_namespace) | ||||||
13480 | << FnDecl->getDeclName(); | ||||||
13481 | } | ||||||
13482 | |||||||
13483 | if (isa<TranslationUnitDecl>(DC) && | ||||||
13484 | FnDecl->getStorageClass() == SC_Static) { | ||||||
13485 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||
13486 | diag::err_operator_new_delete_declared_static) | ||||||
13487 | << FnDecl->getDeclName(); | ||||||
13488 | } | ||||||
13489 | |||||||
13490 | return false; | ||||||
13491 | } | ||||||
13492 | |||||||
13493 | static QualType | ||||||
13494 | RemoveAddressSpaceFromPtr(Sema &SemaRef, const PointerType *PtrTy) { | ||||||
13495 | QualType QTy = PtrTy->getPointeeType(); | ||||||
13496 | QTy = SemaRef.Context.removeAddrSpaceQualType(QTy); | ||||||
13497 | return SemaRef.Context.getPointerType(QTy); | ||||||
13498 | } | ||||||
13499 | |||||||
13500 | static inline bool | ||||||
13501 | CheckOperatorNewDeleteTypes(Sema &SemaRef, const FunctionDecl *FnDecl, | ||||||
13502 | CanQualType ExpectedResultType, | ||||||
13503 | CanQualType ExpectedFirstParamType, | ||||||
13504 | unsigned DependentParamTypeDiag, | ||||||
13505 | unsigned InvalidParamTypeDiag) { | ||||||
13506 | QualType ResultType = | ||||||
13507 | FnDecl->getType()->getAs<FunctionType>()->getReturnType(); | ||||||
13508 | |||||||
13509 | // Check that the result type is not dependent. | ||||||
13510 | if (ResultType->isDependentType()) | ||||||
13511 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||
13512 | diag::err_operator_new_delete_dependent_result_type) | ||||||
13513 | << FnDecl->getDeclName() << ExpectedResultType; | ||||||
13514 | |||||||
13515 | // The operator is valid on any address space for OpenCL. | ||||||
13516 | if (SemaRef.getLangOpts().OpenCLCPlusPlus) { | ||||||
13517 | if (auto *PtrTy = ResultType->getAs<PointerType>()) { | ||||||
13518 | ResultType = RemoveAddressSpaceFromPtr(SemaRef, PtrTy); | ||||||
13519 | } | ||||||
13520 | } | ||||||
13521 | |||||||
13522 | // Check that the result type is what we expect. | ||||||
13523 | if (SemaRef.Context.getCanonicalType(ResultType) != ExpectedResultType) | ||||||
13524 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||
13525 | diag::err_operator_new_delete_invalid_result_type) | ||||||
13526 | << FnDecl->getDeclName() << ExpectedResultType; | ||||||
13527 | |||||||
13528 | // A function template must have at least 2 parameters. | ||||||
13529 | if (FnDecl->getDescribedFunctionTemplate() && FnDecl->getNumParams() < 2) | ||||||
13530 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||
13531 | diag::err_operator_new_delete_template_too_few_parameters) | ||||||
13532 | << FnDecl->getDeclName(); | ||||||
13533 | |||||||
13534 | // The function decl must have at least 1 parameter. | ||||||
13535 | if (FnDecl->getNumParams() == 0) | ||||||
13536 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||
13537 | diag::err_operator_new_delete_too_few_parameters) | ||||||
13538 | << FnDecl->getDeclName(); | ||||||
13539 | |||||||
13540 | // Check the first parameter type is not dependent. | ||||||
13541 | QualType FirstParamType = FnDecl->getParamDecl(0)->getType(); | ||||||
13542 | if (FirstParamType->isDependentType()) | ||||||
13543 | return SemaRef.Diag(FnDecl->getLocation(), DependentParamTypeDiag) | ||||||
13544 | << FnDecl->getDeclName() << ExpectedFirstParamType; | ||||||
13545 | |||||||
13546 | // Check that the first parameter type is what we expect. | ||||||
13547 | if (SemaRef.getLangOpts().OpenCLCPlusPlus) { | ||||||
13548 | // The operator is valid on any address space for OpenCL. | ||||||
13549 | if (auto *PtrTy = | ||||||
13550 | FnDecl->getParamDecl(0)->getType()->getAs<PointerType>()) { | ||||||
13551 | FirstParamType = RemoveAddressSpaceFromPtr(SemaRef, PtrTy); | ||||||
13552 | } | ||||||
13553 | } | ||||||
13554 | if (SemaRef.Context.getCanonicalType(FirstParamType).getUnqualifiedType() != | ||||||
13555 | ExpectedFirstParamType) | ||||||
13556 | return SemaRef.Diag(FnDecl->getLocation(), InvalidParamTypeDiag) | ||||||
13557 | << FnDecl->getDeclName() << ExpectedFirstParamType; | ||||||
13558 | |||||||
13559 | return false; | ||||||
13560 | } | ||||||
13561 | |||||||
13562 | static bool | ||||||
13563 | CheckOperatorNewDeclaration(Sema &SemaRef, const FunctionDecl *FnDecl) { | ||||||
13564 | // C++ [basic.stc.dynamic.allocation]p1: | ||||||
13565 | // A program is ill-formed if an allocation function is declared in a | ||||||
13566 | // namespace scope other than global scope or declared static in global | ||||||
13567 | // scope. | ||||||
13568 | if (CheckOperatorNewDeleteDeclarationScope(SemaRef, FnDecl)) | ||||||
13569 | return true; | ||||||
13570 | |||||||
13571 | CanQualType SizeTy = | ||||||
13572 | SemaRef.Context.getCanonicalType(SemaRef.Context.getSizeType()); | ||||||
13573 | |||||||
13574 | // C++ [basic.stc.dynamic.allocation]p1: | ||||||
13575 | // The return type shall be void*. The first parameter shall have type | ||||||
13576 | // std::size_t. | ||||||
13577 | if (CheckOperatorNewDeleteTypes(SemaRef, FnDecl, SemaRef.Context.VoidPtrTy, | ||||||
13578 | SizeTy, | ||||||
13579 | diag::err_operator_new_dependent_param_type, | ||||||
13580 | diag::err_operator_new_param_type)) | ||||||
13581 | return true; | ||||||
13582 | |||||||
13583 | // C++ [basic.stc.dynamic.allocation]p1: | ||||||
13584 | // The first parameter shall not have an associated default argument. | ||||||
13585 | if (FnDecl->getParamDecl(0)->hasDefaultArg()) | ||||||
13586 | return SemaRef.Diag(FnDecl->getLocation(), | ||||||
13587 | diag::err_operator_new_default_arg) | ||||||
13588 | << FnDecl->getDeclName() << FnDecl->getParamDecl(0)->getDefaultArgRange(); | ||||||
13589 | |||||||
13590 | return false; | ||||||
13591 | } | ||||||
13592 | |||||||
13593 | static bool | ||||||
13594 | CheckOperatorDeleteDeclaration(Sema &SemaRef, FunctionDecl *FnDecl) { | ||||||
13595 | // C++ [basic.stc.dynamic.deallocation]p1: | ||||||
13596 | // A program is ill-formed if deallocation functions are declared in a | ||||||
13597 | // namespace scope other than global scope or declared static in global | ||||||
13598 | // scope. | ||||||
13599 | if (CheckOperatorNewDeleteDeclarationScope(SemaRef, FnDecl)) | ||||||
13600 | return true; | ||||||
13601 | |||||||
13602 | auto *MD = dyn_cast<CXXMethodDecl>(FnDecl); | ||||||
13603 | |||||||
13604 | // C++ P0722: | ||||||
13605 | // Within a class C, the first parameter of a destroying operator delete | ||||||
13606 | // shall be of type C *. The first parameter of any other deallocation | ||||||
13607 | // function shall be of type void *. | ||||||
13608 | CanQualType ExpectedFirstParamType = | ||||||
13609 | MD && MD->isDestroyingOperatorDelete() | ||||||
13610 | ? SemaRef.Context.getCanonicalType(SemaRef.Context.getPointerType( | ||||||
13611 | SemaRef.Context.getRecordType(MD->getParent()))) | ||||||
13612 | : SemaRef.Context.VoidPtrTy; | ||||||
13613 | |||||||
13614 | // C++ [basic.stc.dynamic.deallocation]p2: | ||||||
13615 | // Each deallocation function shall return void | ||||||
13616 | if (CheckOperatorNewDeleteTypes( | ||||||
13617 | SemaRef, FnDecl, SemaRef.Context.VoidTy, ExpectedFirstParamType, | ||||||
13618 | diag::err_operator_delete_dependent_param_type, | ||||||
13619 | diag::err_operator_delete_param_type)) | ||||||
13620 | return true; | ||||||
13621 | |||||||
13622 | // C++ P0722: | ||||||
13623 | // A destroying operator delete shall be a usual deallocation function. | ||||||
13624 | if (MD && !MD->getParent()->isDependentContext() && | ||||||
13625 | MD->isDestroyingOperatorDelete() && | ||||||
13626 | !SemaRef.isUsualDeallocationFunction(MD)) { | ||||||
13627 | SemaRef.Diag(MD->getLocation(), | ||||||
13628 | diag::err_destroying_operator_delete_not_usual); | ||||||
13629 | return true; | ||||||
13630 | } | ||||||
13631 | |||||||
13632 | return false; | ||||||
13633 | } | ||||||
13634 | |||||||
13635 | /// CheckOverloadedOperatorDeclaration - Check whether the declaration | ||||||
13636 | /// of this overloaded operator is well-formed. If so, returns false; | ||||||
13637 | /// otherwise, emits appropriate diagnostics and returns true. | ||||||
13638 | bool Sema::CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl) { | ||||||
13639 | assert(FnDecl && FnDecl->isOverloadedOperator() &&((FnDecl && FnDecl->isOverloadedOperator() && "Expected an overloaded operator declaration") ? static_cast <void> (0) : __assert_fail ("FnDecl && FnDecl->isOverloadedOperator() && \"Expected an overloaded operator declaration\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13640, __PRETTY_FUNCTION__)) | ||||||
13640 | "Expected an overloaded operator declaration")((FnDecl && FnDecl->isOverloadedOperator() && "Expected an overloaded operator declaration") ? static_cast <void> (0) : __assert_fail ("FnDecl && FnDecl->isOverloadedOperator() && \"Expected an overloaded operator declaration\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13640, __PRETTY_FUNCTION__)); | ||||||
13641 | |||||||
13642 | OverloadedOperatorKind Op = FnDecl->getOverloadedOperator(); | ||||||
13643 | |||||||
13644 | // C++ [over.oper]p5: | ||||||
13645 | // The allocation and deallocation functions, operator new, | ||||||
13646 | // operator new[], operator delete and operator delete[], are | ||||||
13647 | // described completely in 3.7.3. The attributes and restrictions | ||||||
13648 | // found in the rest of this subclause do not apply to them unless | ||||||
13649 | // explicitly stated in 3.7.3. | ||||||
13650 | if (Op == OO_Delete || Op == OO_Array_Delete) | ||||||
13651 | return CheckOperatorDeleteDeclaration(*this, FnDecl); | ||||||
13652 | |||||||
13653 | if (Op == OO_New || Op == OO_Array_New) | ||||||
13654 | return CheckOperatorNewDeclaration(*this, FnDecl); | ||||||
13655 | |||||||
13656 | // C++ [over.oper]p6: | ||||||
13657 | // An operator function shall either be a non-static member | ||||||
13658 | // function or be a non-member function and have at least one | ||||||
13659 | // parameter whose type is a class, a reference to a class, an | ||||||
13660 | // enumeration, or a reference to an enumeration. | ||||||
13661 | if (CXXMethodDecl *MethodDecl = dyn_cast<CXXMethodDecl>(FnDecl)) { | ||||||
13662 | if (MethodDecl->isStatic()) | ||||||
13663 | return Diag(FnDecl->getLocation(), | ||||||
13664 | diag::err_operator_overload_static) << FnDecl->getDeclName(); | ||||||
13665 | } else { | ||||||
13666 | bool ClassOrEnumParam = false; | ||||||
13667 | for (auto Param : FnDecl->parameters()) { | ||||||
13668 | QualType ParamType = Param->getType().getNonReferenceType(); | ||||||
13669 | if (ParamType->isDependentType() || ParamType->isRecordType() || | ||||||
13670 | ParamType->isEnumeralType()) { | ||||||
13671 | ClassOrEnumParam = true; | ||||||
13672 | break; | ||||||
13673 | } | ||||||
13674 | } | ||||||
13675 | |||||||
13676 | if (!ClassOrEnumParam) | ||||||
13677 | return Diag(FnDecl->getLocation(), | ||||||
13678 | diag::err_operator_overload_needs_class_or_enum) | ||||||
13679 | << FnDecl->getDeclName(); | ||||||
13680 | } | ||||||
13681 | |||||||
13682 | // C++ [over.oper]p8: | ||||||
13683 | // An operator function cannot have default arguments (8.3.6), | ||||||
13684 | // except where explicitly stated below. | ||||||
13685 | // | ||||||
13686 | // Only the function-call operator allows default arguments | ||||||
13687 | // (C++ [over.call]p1). | ||||||
13688 | if (Op != OO_Call) { | ||||||
13689 | for (auto Param : FnDecl->parameters()) { | ||||||
13690 | if (Param->hasDefaultArg()) | ||||||
13691 | return Diag(Param->getLocation(), | ||||||
13692 | diag::err_operator_overload_default_arg) | ||||||
13693 | << FnDecl->getDeclName() << Param->getDefaultArgRange(); | ||||||
13694 | } | ||||||
13695 | } | ||||||
13696 | |||||||
13697 | static const bool OperatorUses[NUM_OVERLOADED_OPERATORS][3] = { | ||||||
13698 | { false, false, false } | ||||||
13699 | #define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \ | ||||||
13700 | , { Unary, Binary, MemberOnly } | ||||||
13701 | #include "clang/Basic/OperatorKinds.def" | ||||||
13702 | }; | ||||||
13703 | |||||||
13704 | bool CanBeUnaryOperator = OperatorUses[Op][0]; | ||||||
13705 | bool CanBeBinaryOperator = OperatorUses[Op][1]; | ||||||
13706 | bool MustBeMemberOperator = OperatorUses[Op][2]; | ||||||
13707 | |||||||
13708 | // C++ [over.oper]p8: | ||||||
13709 | // [...] Operator functions cannot have more or fewer parameters | ||||||
13710 | // than the number required for the corresponding operator, as | ||||||
13711 | // described in the rest of this subclause. | ||||||
13712 | unsigned NumParams = FnDecl->getNumParams() | ||||||
13713 | + (isa<CXXMethodDecl>(FnDecl)? 1 : 0); | ||||||
13714 | if (Op != OO_Call && | ||||||
13715 | ((NumParams == 1 && !CanBeUnaryOperator) || | ||||||
13716 | (NumParams == 2 && !CanBeBinaryOperator) || | ||||||
13717 | (NumParams < 1) || (NumParams > 2))) { | ||||||
13718 | // We have the wrong number of parameters. | ||||||
13719 | unsigned ErrorKind; | ||||||
13720 | if (CanBeUnaryOperator && CanBeBinaryOperator) { | ||||||
13721 | ErrorKind = 2; // 2 -> unary or binary. | ||||||
13722 | } else if (CanBeUnaryOperator) { | ||||||
13723 | ErrorKind = 0; // 0 -> unary | ||||||
13724 | } else { | ||||||
13725 | assert(CanBeBinaryOperator &&((CanBeBinaryOperator && "All non-call overloaded operators are unary or binary!" ) ? static_cast<void> (0) : __assert_fail ("CanBeBinaryOperator && \"All non-call overloaded operators are unary or binary!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13726, __PRETTY_FUNCTION__)) | ||||||
13726 | "All non-call overloaded operators are unary or binary!")((CanBeBinaryOperator && "All non-call overloaded operators are unary or binary!" ) ? static_cast<void> (0) : __assert_fail ("CanBeBinaryOperator && \"All non-call overloaded operators are unary or binary!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 13726, __PRETTY_FUNCTION__)); | ||||||
13727 | ErrorKind = 1; // 1 -> binary | ||||||
13728 | } | ||||||
13729 | |||||||
13730 | return Diag(FnDecl->getLocation(), diag::err_operator_overload_must_be) | ||||||
13731 | << FnDecl->getDeclName() << NumParams << ErrorKind; | ||||||
13732 | } | ||||||
13733 | |||||||
13734 | // Overloaded operators other than operator() cannot be variadic. | ||||||
13735 | if (Op != OO_Call && | ||||||
13736 | FnDecl->getType()->getAs<FunctionProtoType>()->isVariadic()) { | ||||||
13737 | return Diag(FnDecl->getLocation(), diag::err_operator_overload_variadic) | ||||||
13738 | << FnDecl->getDeclName(); | ||||||
13739 | } | ||||||
13740 | |||||||
13741 | // Some operators must be non-static member functions. | ||||||
13742 | if (MustBeMemberOperator && !isa<CXXMethodDecl>(FnDecl)) { | ||||||
13743 | return Diag(FnDecl->getLocation(), | ||||||
13744 | diag::err_operator_overload_must_be_member) | ||||||
13745 | << FnDecl->getDeclName(); | ||||||
13746 | } | ||||||
13747 | |||||||
13748 | // C++ [over.inc]p1: | ||||||
13749 | // The user-defined function called operator++ implements the | ||||||
13750 | // prefix and postfix ++ operator. If this function is a member | ||||||
13751 | // function with no parameters, or a non-member function with one | ||||||
13752 | // parameter of class or enumeration type, it defines the prefix | ||||||
13753 | // increment operator ++ for objects of that type. If the function | ||||||
13754 | // is a member function with one parameter (which shall be of type | ||||||
13755 | // int) or a non-member function with two parameters (the second | ||||||
13756 | // of which shall be of type int), it defines the postfix | ||||||
13757 | // increment operator ++ for objects of that type. | ||||||
13758 | if ((Op == OO_PlusPlus || Op == OO_MinusMinus) && NumParams == 2) { | ||||||
13759 | ParmVarDecl *LastParam = FnDecl->getParamDecl(FnDecl->getNumParams() - 1); | ||||||
13760 | QualType ParamType = LastParam->getType(); | ||||||
13761 | |||||||
13762 | if (!ParamType->isSpecificBuiltinType(BuiltinType::Int) && | ||||||
13763 | !ParamType->isDependentType()) | ||||||
13764 | return Diag(LastParam->getLocation(), | ||||||
13765 | diag::err_operator_overload_post_incdec_must_be_int) | ||||||
13766 | << LastParam->getType() << (Op == OO_MinusMinus); | ||||||
13767 | } | ||||||
13768 | |||||||
13769 | return false; | ||||||
13770 | } | ||||||
13771 | |||||||
13772 | static bool | ||||||
13773 | checkLiteralOperatorTemplateParameterList(Sema &SemaRef, | ||||||
13774 | FunctionTemplateDecl *TpDecl) { | ||||||
13775 | TemplateParameterList *TemplateParams = TpDecl->getTemplateParameters(); | ||||||
13776 | |||||||
13777 | // Must have one or two template parameters. | ||||||
13778 | if (TemplateParams->size() == 1) { | ||||||
13779 | NonTypeTemplateParmDecl *PmDecl = | ||||||
13780 | dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(0)); | ||||||
13781 | |||||||
13782 | // The template parameter must be a char parameter pack. | ||||||
13783 | if (PmDecl && PmDecl->isTemplateParameterPack() && | ||||||
13784 | SemaRef.Context.hasSameType(PmDecl->getType(), SemaRef.Context.CharTy)) | ||||||
13785 | return false; | ||||||
13786 | |||||||
13787 | } else if (TemplateParams->size() == 2) { | ||||||
13788 | TemplateTypeParmDecl *PmType = | ||||||
13789 | dyn_cast<TemplateTypeParmDecl>(TemplateParams->getParam(0)); | ||||||
13790 | NonTypeTemplateParmDecl *PmArgs = | ||||||
13791 | dyn_cast<NonTypeTemplateParmDecl>(TemplateParams->getParam(1)); | ||||||
13792 | |||||||
13793 | // The second template parameter must be a parameter pack with the | ||||||
13794 | // first template parameter as its type. | ||||||
13795 | if (PmType && PmArgs && !PmType->isTemplateParameterPack() && | ||||||
13796 | PmArgs->isTemplateParameterPack()) { | ||||||
13797 | const TemplateTypeParmType *TArgs = | ||||||
13798 | PmArgs->getType()->getAs<TemplateTypeParmType>(); | ||||||
13799 | if (TArgs && TArgs->getDepth() == PmType->getDepth() && | ||||||
13800 | TArgs->getIndex() == PmType->getIndex()) { | ||||||
13801 | if (!SemaRef.inTemplateInstantiation()) | ||||||
13802 | SemaRef.Diag(TpDecl->getLocation(), | ||||||
13803 | diag::ext_string_literal_operator_template); | ||||||
13804 | return false; | ||||||
13805 | } | ||||||
13806 | } | ||||||
13807 | } | ||||||
13808 | |||||||
13809 | SemaRef.Diag(TpDecl->getTemplateParameters()->getSourceRange().getBegin(), | ||||||
13810 | diag::err_literal_operator_template) | ||||||
13811 | << TpDecl->getTemplateParameters()->getSourceRange(); | ||||||
13812 | return true; | ||||||
13813 | } | ||||||
13814 | |||||||
13815 | /// CheckLiteralOperatorDeclaration - Check whether the declaration | ||||||
13816 | /// of this literal operator function is well-formed. If so, returns | ||||||
13817 | /// false; otherwise, emits appropriate diagnostics and returns true. | ||||||
13818 | bool Sema::CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl) { | ||||||
13819 | if (isa<CXXMethodDecl>(FnDecl)) { | ||||||
13820 | Diag(FnDecl->getLocation(), diag::err_literal_operator_outside_namespace) | ||||||
13821 | << FnDecl->getDeclName(); | ||||||
13822 | return true; | ||||||
13823 | } | ||||||
13824 | |||||||
13825 | if (FnDecl->isExternC()) { | ||||||
13826 | Diag(FnDecl->getLocation(), diag::err_literal_operator_extern_c); | ||||||
13827 | if (const LinkageSpecDecl *LSD = | ||||||
13828 | FnDecl->getDeclContext()->getExternCContext()) | ||||||
13829 | Diag(LSD->getExternLoc(), diag::note_extern_c_begins_here); | ||||||
13830 | return true; | ||||||
13831 | } | ||||||
13832 | |||||||
13833 | // This might be the definition of a literal operator template. | ||||||
13834 | FunctionTemplateDecl *TpDecl = FnDecl->getDescribedFunctionTemplate(); | ||||||
13835 | |||||||
13836 | // This might be a specialization of a literal operator template. | ||||||
13837 | if (!TpDecl) | ||||||
13838 | TpDecl = FnDecl->getPrimaryTemplate(); | ||||||
13839 | |||||||
13840 | // template <char...> type operator "" name() and | ||||||
13841 | // template <class T, T...> type operator "" name() are the only valid | ||||||
13842 | // template signatures, and the only valid signatures with no parameters. | ||||||
13843 | if (TpDecl) { | ||||||
13844 | if (FnDecl->param_size() != 0) { | ||||||
13845 | Diag(FnDecl->getLocation(), | ||||||
13846 | diag::err_literal_operator_template_with_params); | ||||||
13847 | return true; | ||||||
13848 | } | ||||||
13849 | |||||||
13850 | if (checkLiteralOperatorTemplateParameterList(*this, TpDecl)) | ||||||
13851 | return true; | ||||||
13852 | |||||||
13853 | } else if (FnDecl->param_size() == 1) { | ||||||
13854 | const ParmVarDecl *Param = FnDecl->getParamDecl(0); | ||||||
13855 | |||||||
13856 | QualType ParamType = Param->getType().getUnqualifiedType(); | ||||||
13857 | |||||||
13858 | // Only unsigned long long int, long double, any character type, and const | ||||||
13859 | // char * are allowed as the only parameters. | ||||||
13860 | if (ParamType->isSpecificBuiltinType(BuiltinType::ULongLong) || | ||||||
13861 | ParamType->isSpecificBuiltinType(BuiltinType::LongDouble) || | ||||||
13862 | Context.hasSameType(ParamType, Context.CharTy) || | ||||||
13863 | Context.hasSameType(ParamType, Context.WideCharTy) || | ||||||
13864 | Context.hasSameType(ParamType, Context.Char8Ty) || | ||||||
13865 | Context.hasSameType(ParamType, Context.Char16Ty) || | ||||||
13866 | Context.hasSameType(ParamType, Context.Char32Ty)) { | ||||||
13867 | } else if (const PointerType *Ptr = ParamType->getAs<PointerType>()) { | ||||||
13868 | QualType InnerType = Ptr->getPointeeType(); | ||||||
13869 | |||||||
13870 | // Pointer parameter must be a const char *. | ||||||
13871 | if (!(Context.hasSameType(InnerType.getUnqualifiedType(), | ||||||
13872 | Context.CharTy) && | ||||||
13873 | InnerType.isConstQualified() && !InnerType.isVolatileQualified())) { | ||||||
13874 | Diag(Param->getSourceRange().getBegin(), | ||||||
13875 | diag::err_literal_operator_param) | ||||||
13876 | << ParamType << "'const char *'" << Param->getSourceRange(); | ||||||
13877 | return true; | ||||||
13878 | } | ||||||
13879 | |||||||
13880 | } else if (ParamType->isRealFloatingType()) { | ||||||
13881 | Diag(Param->getSourceRange().getBegin(), diag::err_literal_operator_param) | ||||||
13882 | << ParamType << Context.LongDoubleTy << Param->getSourceRange(); | ||||||
13883 | return true; | ||||||
13884 | |||||||
13885 | } else if (ParamType->isIntegerType()) { | ||||||
13886 | Diag(Param->getSourceRange().getBegin(), diag::err_literal_operator_param) | ||||||
13887 | << ParamType << Context.UnsignedLongLongTy << Param->getSourceRange(); | ||||||
13888 | return true; | ||||||
13889 | |||||||
13890 | } else { | ||||||
13891 | Diag(Param->getSourceRange().getBegin(), | ||||||
13892 | diag::err_literal_operator_invalid_param) | ||||||
13893 | << ParamType << Param->getSourceRange(); | ||||||
13894 | return true; | ||||||
13895 | } | ||||||
13896 | |||||||
13897 | } else if (FnDecl->param_size() == 2) { | ||||||
13898 | FunctionDecl::param_iterator Param = FnDecl->param_begin(); | ||||||
13899 | |||||||
13900 | // First, verify that the first parameter is correct. | ||||||
13901 | |||||||
13902 | QualType FirstParamType = (*Param)->getType().getUnqualifiedType(); | ||||||
13903 | |||||||
13904 | // Two parameter function must have a pointer to const as a | ||||||
13905 | // first parameter; let's strip those qualifiers. | ||||||
13906 | const PointerType *PT = FirstParamType->getAs<PointerType>(); | ||||||
13907 | |||||||
13908 | if (!PT) { | ||||||
13909 | Diag((*Param)->getSourceRange().getBegin(), | ||||||
13910 | diag::err_literal_operator_param) | ||||||
13911 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||||
13912 | return true; | ||||||
13913 | } | ||||||
13914 | |||||||
13915 | QualType PointeeType = PT->getPointeeType(); | ||||||
13916 | // First parameter must be const | ||||||
13917 | if (!PointeeType.isConstQualified() || PointeeType.isVolatileQualified()) { | ||||||
13918 | Diag((*Param)->getSourceRange().getBegin(), | ||||||
13919 | diag::err_literal_operator_param) | ||||||
13920 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||||
13921 | return true; | ||||||
13922 | } | ||||||
13923 | |||||||
13924 | QualType InnerType = PointeeType.getUnqualifiedType(); | ||||||
13925 | // Only const char *, const wchar_t*, const char8_t*, const char16_t*, and | ||||||
13926 | // const char32_t* are allowed as the first parameter to a two-parameter | ||||||
13927 | // function | ||||||
13928 | if (!(Context.hasSameType(InnerType, Context.CharTy) || | ||||||
13929 | Context.hasSameType(InnerType, Context.WideCharTy) || | ||||||
13930 | Context.hasSameType(InnerType, Context.Char8Ty) || | ||||||
13931 | Context.hasSameType(InnerType, Context.Char16Ty) || | ||||||
13932 | Context.hasSameType(InnerType, Context.Char32Ty))) { | ||||||
13933 | Diag((*Param)->getSourceRange().getBegin(), | ||||||
13934 | diag::err_literal_operator_param) | ||||||
13935 | << FirstParamType << "'const char *'" << (*Param)->getSourceRange(); | ||||||
13936 | return true; | ||||||
13937 | } | ||||||
13938 | |||||||
13939 | // Move on to the second and final parameter. | ||||||
13940 | ++Param; | ||||||
13941 | |||||||
13942 | // The second parameter must be a std::size_t. | ||||||
13943 | QualType SecondParamType = (*Param)->getType().getUnqualifiedType(); | ||||||
13944 | if (!Context.hasSameType(SecondParamType, Context.getSizeType())) { | ||||||
13945 | Diag((*Param)->getSourceRange().getBegin(), | ||||||
13946 | diag::err_literal_operator_param) | ||||||
13947 | << SecondParamType << Context.getSizeType() | ||||||
13948 | << (*Param)->getSourceRange(); | ||||||
13949 | return true; | ||||||
13950 | } | ||||||
13951 | } else { | ||||||
13952 | Diag(FnDecl->getLocation(), diag::err_literal_operator_bad_param_count); | ||||||
13953 | return true; | ||||||
13954 | } | ||||||
13955 | |||||||
13956 | // Parameters are good. | ||||||
13957 | |||||||
13958 | // A parameter-declaration-clause containing a default argument is not | ||||||
13959 | // equivalent to any of the permitted forms. | ||||||
13960 | for (auto Param : FnDecl->parameters()) { | ||||||
13961 | if (Param->hasDefaultArg()) { | ||||||
13962 | Diag(Param->getDefaultArgRange().getBegin(), | ||||||
13963 | diag::err_literal_operator_default_argument) | ||||||
13964 | << Param->getDefaultArgRange(); | ||||||
13965 | break; | ||||||
13966 | } | ||||||
13967 | } | ||||||
13968 | |||||||
13969 | StringRef LiteralName | ||||||
13970 | = FnDecl->getDeclName().getCXXLiteralIdentifier()->getName(); | ||||||
13971 | if (LiteralName[0] != '_' && | ||||||
13972 | !getSourceManager().isInSystemHeader(FnDecl->getLocation())) { | ||||||
13973 | // C++11 [usrlit.suffix]p1: | ||||||
13974 | // Literal suffix identifiers that do not start with an underscore | ||||||
13975 | // are reserved for future standardization. | ||||||
13976 | Diag(FnDecl->getLocation(), diag::warn_user_literal_reserved) | ||||||
13977 | << StringLiteralParser::isValidUDSuffix(getLangOpts(), LiteralName); | ||||||
13978 | } | ||||||
13979 | |||||||
13980 | return false; | ||||||
13981 | } | ||||||
13982 | |||||||
13983 | /// ActOnStartLinkageSpecification - Parsed the beginning of a C++ | ||||||
13984 | /// linkage specification, including the language and (if present) | ||||||
13985 | /// the '{'. ExternLoc is the location of the 'extern', Lang is the | ||||||
13986 | /// language string literal. LBraceLoc, if valid, provides the location of | ||||||
13987 | /// the '{' brace. Otherwise, this linkage specification does not | ||||||
13988 | /// have any braces. | ||||||
13989 | Decl *Sema::ActOnStartLinkageSpecification(Scope *S, SourceLocation ExternLoc, | ||||||
13990 | Expr *LangStr, | ||||||
13991 | SourceLocation LBraceLoc) { | ||||||
13992 | StringLiteral *Lit = cast<StringLiteral>(LangStr); | ||||||
13993 | if (!Lit->isAscii()) { | ||||||
13994 | Diag(LangStr->getExprLoc(), diag::err_language_linkage_spec_not_ascii) | ||||||
13995 | << LangStr->getSourceRange(); | ||||||
13996 | return nullptr; | ||||||
13997 | } | ||||||
13998 | |||||||
13999 | StringRef Lang = Lit->getString(); | ||||||
14000 | LinkageSpecDecl::LanguageIDs Language; | ||||||
14001 | if (Lang == "C") | ||||||
14002 | Language = LinkageSpecDecl::lang_c; | ||||||
14003 | else if (Lang == "C++") | ||||||
14004 | Language = LinkageSpecDecl::lang_cxx; | ||||||
14005 | else if (Lang == "C++11") | ||||||
14006 | Language = LinkageSpecDecl::lang_cxx_11; | ||||||
14007 | else if (Lang == "C++14") | ||||||
14008 | Language = LinkageSpecDecl::lang_cxx_14; | ||||||
14009 | else { | ||||||
14010 | Diag(LangStr->getExprLoc(), diag::err_language_linkage_spec_unknown) | ||||||
14011 | << LangStr->getSourceRange(); | ||||||
14012 | return nullptr; | ||||||
14013 | } | ||||||
14014 | |||||||
14015 | // FIXME: Add all the various semantics of linkage specifications | ||||||
14016 | |||||||
14017 | LinkageSpecDecl *D = LinkageSpecDecl::Create(Context, CurContext, ExternLoc, | ||||||
14018 | LangStr->getExprLoc(), Language, | ||||||
14019 | LBraceLoc.isValid()); | ||||||
14020 | CurContext->addDecl(D); | ||||||
14021 | PushDeclContext(S, D); | ||||||
14022 | return D; | ||||||
14023 | } | ||||||
14024 | |||||||
14025 | /// ActOnFinishLinkageSpecification - Complete the definition of | ||||||
14026 | /// the C++ linkage specification LinkageSpec. If RBraceLoc is | ||||||
14027 | /// valid, it's the position of the closing '}' brace in a linkage | ||||||
14028 | /// specification that uses braces. | ||||||
14029 | Decl *Sema::ActOnFinishLinkageSpecification(Scope *S, | ||||||
14030 | Decl *LinkageSpec, | ||||||
14031 | SourceLocation RBraceLoc) { | ||||||
14032 | if (RBraceLoc.isValid()) { | ||||||
14033 | LinkageSpecDecl* LSDecl = cast<LinkageSpecDecl>(LinkageSpec); | ||||||
14034 | LSDecl->setRBraceLoc(RBraceLoc); | ||||||
14035 | } | ||||||
14036 | PopDeclContext(); | ||||||
14037 | return LinkageSpec; | ||||||
14038 | } | ||||||
14039 | |||||||
14040 | Decl *Sema::ActOnEmptyDeclaration(Scope *S, | ||||||
14041 | const ParsedAttributesView &AttrList, | ||||||
14042 | SourceLocation SemiLoc) { | ||||||
14043 | Decl *ED = EmptyDecl::Create(Context, CurContext, SemiLoc); | ||||||
14044 | // Attribute declarations appertain to empty declaration so we handle | ||||||
14045 | // them here. | ||||||
14046 | ProcessDeclAttributeList(S, ED, AttrList); | ||||||
14047 | |||||||
14048 | CurContext->addDecl(ED); | ||||||
14049 | return ED; | ||||||
14050 | } | ||||||
14051 | |||||||
14052 | /// Perform semantic analysis for the variable declaration that | ||||||
14053 | /// occurs within a C++ catch clause, returning the newly-created | ||||||
14054 | /// variable. | ||||||
14055 | VarDecl *Sema::BuildExceptionDeclaration(Scope *S, | ||||||
14056 | TypeSourceInfo *TInfo, | ||||||
14057 | SourceLocation StartLoc, | ||||||
14058 | SourceLocation Loc, | ||||||
14059 | IdentifierInfo *Name) { | ||||||
14060 | bool Invalid = false; | ||||||
14061 | QualType ExDeclType = TInfo->getType(); | ||||||
14062 | |||||||
14063 | // Arrays and functions decay. | ||||||
14064 | if (ExDeclType->isArrayType()) | ||||||
14065 | ExDeclType = Context.getArrayDecayedType(ExDeclType); | ||||||
14066 | else if (ExDeclType->isFunctionType()) | ||||||
14067 | ExDeclType = Context.getPointerType(ExDeclType); | ||||||
14068 | |||||||
14069 | // C++ 15.3p1: The exception-declaration shall not denote an incomplete type. | ||||||
14070 | // The exception-declaration shall not denote a pointer or reference to an | ||||||
14071 | // incomplete type, other than [cv] void*. | ||||||
14072 | // N2844 forbids rvalue references. | ||||||
14073 | if (!ExDeclType->isDependentType() && ExDeclType->isRValueReferenceType()) { | ||||||
14074 | Diag(Loc, diag::err_catch_rvalue_ref); | ||||||
14075 | Invalid = true; | ||||||
14076 | } | ||||||
14077 | |||||||
14078 | if (ExDeclType->isVariablyModifiedType()) { | ||||||
14079 | Diag(Loc, diag::err_catch_variably_modified) << ExDeclType; | ||||||
14080 | Invalid = true; | ||||||
14081 | } | ||||||
14082 | |||||||
14083 | QualType BaseType = ExDeclType; | ||||||
14084 | int Mode = 0; // 0 for direct type, 1 for pointer, 2 for reference | ||||||
14085 | unsigned DK = diag::err_catch_incomplete; | ||||||
14086 | if (const PointerType *Ptr = BaseType->getAs<PointerType>()) { | ||||||
14087 | BaseType = Ptr->getPointeeType(); | ||||||
14088 | Mode = 1; | ||||||
14089 | DK = diag::err_catch_incomplete_ptr; | ||||||
14090 | } else if (const ReferenceType *Ref = BaseType->getAs<ReferenceType>()) { | ||||||
14091 | // For the purpose of error recovery, we treat rvalue refs like lvalue refs. | ||||||
14092 | BaseType = Ref->getPointeeType(); | ||||||
14093 | Mode = 2; | ||||||
14094 | DK = diag::err_catch_incomplete_ref; | ||||||
14095 | } | ||||||
14096 | if (!Invalid && (Mode == 0 || !BaseType->isVoidType()) && | ||||||
14097 | !BaseType->isDependentType() && RequireCompleteType(Loc, BaseType, DK)) | ||||||
14098 | Invalid = true; | ||||||
14099 | |||||||
14100 | if (!Invalid && !ExDeclType->isDependentType() && | ||||||
14101 | RequireNonAbstractType(Loc, ExDeclType, | ||||||
14102 | diag::err_abstract_type_in_decl, | ||||||
14103 | AbstractVariableType)) | ||||||
14104 | Invalid = true; | ||||||
14105 | |||||||
14106 | // Only the non-fragile NeXT runtime currently supports C++ catches | ||||||
14107 | // of ObjC types, and no runtime supports catching ObjC types by value. | ||||||
14108 | if (!Invalid && getLangOpts().ObjC) { | ||||||
14109 | QualType T = ExDeclType; | ||||||
14110 | if (const ReferenceType *RT = T->getAs<ReferenceType>()) | ||||||
14111 | T = RT->getPointeeType(); | ||||||
14112 | |||||||
14113 | if (T->isObjCObjectType()) { | ||||||
14114 | Diag(Loc, diag::err_objc_object_catch); | ||||||
14115 | Invalid = true; | ||||||
14116 | } else if (T->isObjCObjectPointerType()) { | ||||||
14117 | // FIXME: should this be a test for macosx-fragile specifically? | ||||||
14118 | if (getLangOpts().ObjCRuntime.isFragile()) | ||||||
14119 | Diag(Loc, diag::warn_objc_pointer_cxx_catch_fragile); | ||||||
14120 | } | ||||||
14121 | } | ||||||
14122 | |||||||
14123 | VarDecl *ExDecl = VarDecl::Create(Context, CurContext, StartLoc, Loc, Name, | ||||||
14124 | ExDeclType, TInfo, SC_None); | ||||||
14125 | ExDecl->setExceptionVariable(true); | ||||||
14126 | |||||||
14127 | // In ARC, infer 'retaining' for variables of retainable type. | ||||||
14128 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(ExDecl)) | ||||||
14129 | Invalid = true; | ||||||
14130 | |||||||
14131 | if (!Invalid && !ExDeclType->isDependentType()) { | ||||||
14132 | if (const RecordType *recordType = ExDeclType->getAs<RecordType>()) { | ||||||
14133 | // Insulate this from anything else we might currently be parsing. | ||||||
14134 | EnterExpressionEvaluationContext scope( | ||||||
14135 | *this, ExpressionEvaluationContext::PotentiallyEvaluated); | ||||||
14136 | |||||||
14137 | // C++ [except.handle]p16: | ||||||
14138 | // The object declared in an exception-declaration or, if the | ||||||
14139 | // exception-declaration does not specify a name, a temporary (12.2) is | ||||||
14140 | // copy-initialized (8.5) from the exception object. [...] | ||||||
14141 | // The object is destroyed when the handler exits, after the destruction | ||||||
14142 | // of any automatic objects initialized within the handler. | ||||||
14143 | // | ||||||
14144 | // We just pretend to initialize the object with itself, then make sure | ||||||
14145 | // it can be destroyed later. | ||||||
14146 | QualType initType = Context.getExceptionObjectType(ExDeclType); | ||||||
14147 | |||||||
14148 | InitializedEntity entity = | ||||||
14149 | InitializedEntity::InitializeVariable(ExDecl); | ||||||
14150 | InitializationKind initKind = | ||||||
14151 | InitializationKind::CreateCopy(Loc, SourceLocation()); | ||||||
14152 | |||||||
14153 | Expr *opaqueValue = | ||||||
14154 | new (Context) OpaqueValueExpr(Loc, initType, VK_LValue, OK_Ordinary); | ||||||
14155 | InitializationSequence sequence(*this, entity, initKind, opaqueValue); | ||||||
14156 | ExprResult result = sequence.Perform(*this, entity, initKind, opaqueValue); | ||||||
14157 | if (result.isInvalid()) | ||||||
14158 | Invalid = true; | ||||||
14159 | else { | ||||||
14160 | // If the constructor used was non-trivial, set this as the | ||||||
14161 | // "initializer". | ||||||
14162 | CXXConstructExpr *construct = result.getAs<CXXConstructExpr>(); | ||||||
14163 | if (!construct->getConstructor()->isTrivial()) { | ||||||
14164 | Expr *init = MaybeCreateExprWithCleanups(construct); | ||||||
14165 | ExDecl->setInit(init); | ||||||
14166 | } | ||||||
14167 | |||||||
14168 | // And make sure it's destructable. | ||||||
14169 | FinalizeVarWithDestructor(ExDecl, recordType); | ||||||
14170 | } | ||||||
14171 | } | ||||||
14172 | } | ||||||
14173 | |||||||
14174 | if (Invalid) | ||||||
14175 | ExDecl->setInvalidDecl(); | ||||||
14176 | |||||||
14177 | return ExDecl; | ||||||
14178 | } | ||||||
14179 | |||||||
14180 | /// ActOnExceptionDeclarator - Parsed the exception-declarator in a C++ catch | ||||||
14181 | /// handler. | ||||||
14182 | Decl *Sema::ActOnExceptionDeclarator(Scope *S, Declarator &D) { | ||||||
14183 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
14184 | bool Invalid = D.isInvalidType(); | ||||||
14185 | |||||||
14186 | // Check for unexpanded parameter packs. | ||||||
14187 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
14188 | UPPC_ExceptionType)) { | ||||||
14189 | TInfo = Context.getTrivialTypeSourceInfo(Context.IntTy, | ||||||
14190 | D.getIdentifierLoc()); | ||||||
14191 | Invalid = true; | ||||||
14192 | } | ||||||
14193 | |||||||
14194 | IdentifierInfo *II = D.getIdentifier(); | ||||||
14195 | if (NamedDecl *PrevDecl = LookupSingleName(S, II, D.getIdentifierLoc(), | ||||||
14196 | LookupOrdinaryName, | ||||||
14197 | ForVisibleRedeclaration)) { | ||||||
14198 | // The scope should be freshly made just for us. There is just no way | ||||||
14199 | // it contains any previous declaration, except for function parameters in | ||||||
14200 | // a function-try-block's catch statement. | ||||||
14201 | assert(!S->isDeclScope(PrevDecl))((!S->isDeclScope(PrevDecl)) ? static_cast<void> (0) : __assert_fail ("!S->isDeclScope(PrevDecl)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14201, __PRETTY_FUNCTION__)); | ||||||
14202 | if (isDeclInScope(PrevDecl, CurContext, S)) { | ||||||
14203 | Diag(D.getIdentifierLoc(), diag::err_redefinition) | ||||||
14204 | << D.getIdentifier(); | ||||||
14205 | Diag(PrevDecl->getLocation(), diag::note_previous_definition); | ||||||
14206 | Invalid = true; | ||||||
14207 | } else if (PrevDecl->isTemplateParameter()) | ||||||
14208 | // Maybe we will complain about the shadowed template parameter. | ||||||
14209 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||
14210 | } | ||||||
14211 | |||||||
14212 | if (D.getCXXScopeSpec().isSet() && !Invalid) { | ||||||
14213 | Diag(D.getIdentifierLoc(), diag::err_qualified_catch_declarator) | ||||||
14214 | << D.getCXXScopeSpec().getRange(); | ||||||
14215 | Invalid = true; | ||||||
14216 | } | ||||||
14217 | |||||||
14218 | VarDecl *ExDecl = BuildExceptionDeclaration( | ||||||
14219 | S, TInfo, D.getBeginLoc(), D.getIdentifierLoc(), D.getIdentifier()); | ||||||
14220 | if (Invalid) | ||||||
14221 | ExDecl->setInvalidDecl(); | ||||||
14222 | |||||||
14223 | // Add the exception declaration into this scope. | ||||||
14224 | if (II) | ||||||
14225 | PushOnScopeChains(ExDecl, S); | ||||||
14226 | else | ||||||
14227 | CurContext->addDecl(ExDecl); | ||||||
14228 | |||||||
14229 | ProcessDeclAttributes(S, ExDecl, D); | ||||||
14230 | return ExDecl; | ||||||
14231 | } | ||||||
14232 | |||||||
14233 | Decl *Sema::ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, | ||||||
14234 | Expr *AssertExpr, | ||||||
14235 | Expr *AssertMessageExpr, | ||||||
14236 | SourceLocation RParenLoc) { | ||||||
14237 | StringLiteral *AssertMessage = | ||||||
14238 | AssertMessageExpr ? cast<StringLiteral>(AssertMessageExpr) : nullptr; | ||||||
14239 | |||||||
14240 | if (DiagnoseUnexpandedParameterPack(AssertExpr, UPPC_StaticAssertExpression)) | ||||||
14241 | return nullptr; | ||||||
14242 | |||||||
14243 | return BuildStaticAssertDeclaration(StaticAssertLoc, AssertExpr, | ||||||
14244 | AssertMessage, RParenLoc, false); | ||||||
14245 | } | ||||||
14246 | |||||||
14247 | Decl *Sema::BuildStaticAssertDeclaration(SourceLocation StaticAssertLoc, | ||||||
14248 | Expr *AssertExpr, | ||||||
14249 | StringLiteral *AssertMessage, | ||||||
14250 | SourceLocation RParenLoc, | ||||||
14251 | bool Failed) { | ||||||
14252 | assert(AssertExpr != nullptr && "Expected non-null condition")((AssertExpr != nullptr && "Expected non-null condition" ) ? static_cast<void> (0) : __assert_fail ("AssertExpr != nullptr && \"Expected non-null condition\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14252, __PRETTY_FUNCTION__)); | ||||||
14253 | if (!AssertExpr->isTypeDependent() && !AssertExpr->isValueDependent() && | ||||||
14254 | !Failed) { | ||||||
14255 | // In a static_assert-declaration, the constant-expression shall be a | ||||||
14256 | // constant expression that can be contextually converted to bool. | ||||||
14257 | ExprResult Converted = PerformContextuallyConvertToBool(AssertExpr); | ||||||
14258 | if (Converted.isInvalid()) | ||||||
14259 | Failed = true; | ||||||
14260 | |||||||
14261 | ExprResult FullAssertExpr = | ||||||
14262 | ActOnFinishFullExpr(Converted.get(), StaticAssertLoc, | ||||||
14263 | /*DiscardedValue*/ false, | ||||||
14264 | /*IsConstexpr*/ true); | ||||||
14265 | if (FullAssertExpr.isInvalid()) | ||||||
14266 | Failed = true; | ||||||
14267 | else | ||||||
14268 | AssertExpr = FullAssertExpr.get(); | ||||||
14269 | |||||||
14270 | llvm::APSInt Cond; | ||||||
14271 | if (!Failed && VerifyIntegerConstantExpression(AssertExpr, &Cond, | ||||||
14272 | diag::err_static_assert_expression_is_not_constant, | ||||||
14273 | /*AllowFold=*/false).isInvalid()) | ||||||
14274 | Failed = true; | ||||||
14275 | |||||||
14276 | if (!Failed && !Cond) { | ||||||
14277 | SmallString<256> MsgBuffer; | ||||||
14278 | llvm::raw_svector_ostream Msg(MsgBuffer); | ||||||
14279 | if (AssertMessage) | ||||||
14280 | AssertMessage->printPretty(Msg, nullptr, getPrintingPolicy()); | ||||||
14281 | |||||||
14282 | Expr *InnerCond = nullptr; | ||||||
14283 | std::string InnerCondDescription; | ||||||
14284 | std::tie(InnerCond, InnerCondDescription) = | ||||||
14285 | findFailedBooleanCondition(Converted.get()); | ||||||
14286 | if (InnerCond && !isa<CXXBoolLiteralExpr>(InnerCond) | ||||||
14287 | && !isa<IntegerLiteral>(InnerCond)) { | ||||||
14288 | Diag(StaticAssertLoc, diag::err_static_assert_requirement_failed) | ||||||
14289 | << InnerCondDescription << !AssertMessage | ||||||
14290 | << Msg.str() << InnerCond->getSourceRange(); | ||||||
14291 | } else { | ||||||
14292 | Diag(StaticAssertLoc, diag::err_static_assert_failed) | ||||||
14293 | << !AssertMessage << Msg.str() << AssertExpr->getSourceRange(); | ||||||
14294 | } | ||||||
14295 | Failed = true; | ||||||
14296 | } | ||||||
14297 | } else { | ||||||
14298 | ExprResult FullAssertExpr = ActOnFinishFullExpr(AssertExpr, StaticAssertLoc, | ||||||
14299 | /*DiscardedValue*/false, | ||||||
14300 | /*IsConstexpr*/true); | ||||||
14301 | if (FullAssertExpr.isInvalid()) | ||||||
14302 | Failed = true; | ||||||
14303 | else | ||||||
14304 | AssertExpr = FullAssertExpr.get(); | ||||||
14305 | } | ||||||
14306 | |||||||
14307 | Decl *Decl = StaticAssertDecl::Create(Context, CurContext, StaticAssertLoc, | ||||||
14308 | AssertExpr, AssertMessage, RParenLoc, | ||||||
14309 | Failed); | ||||||
14310 | |||||||
14311 | CurContext->addDecl(Decl); | ||||||
14312 | return Decl; | ||||||
14313 | } | ||||||
14314 | |||||||
14315 | /// Perform semantic analysis of the given friend type declaration. | ||||||
14316 | /// | ||||||
14317 | /// \returns A friend declaration that. | ||||||
14318 | FriendDecl *Sema::CheckFriendTypeDecl(SourceLocation LocStart, | ||||||
14319 | SourceLocation FriendLoc, | ||||||
14320 | TypeSourceInfo *TSInfo) { | ||||||
14321 | assert(TSInfo && "NULL TypeSourceInfo for friend type declaration")((TSInfo && "NULL TypeSourceInfo for friend type declaration" ) ? static_cast<void> (0) : __assert_fail ("TSInfo && \"NULL TypeSourceInfo for friend type declaration\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14321, __PRETTY_FUNCTION__)); | ||||||
14322 | |||||||
14323 | QualType T = TSInfo->getType(); | ||||||
14324 | SourceRange TypeRange = TSInfo->getTypeLoc().getLocalSourceRange(); | ||||||
14325 | |||||||
14326 | // C++03 [class.friend]p2: | ||||||
14327 | // An elaborated-type-specifier shall be used in a friend declaration | ||||||
14328 | // for a class.* | ||||||
14329 | // | ||||||
14330 | // * The class-key of the elaborated-type-specifier is required. | ||||||
14331 | if (!CodeSynthesisContexts.empty()) { | ||||||
14332 | // Do not complain about the form of friend template types during any kind | ||||||
14333 | // of code synthesis. For template instantiation, we will have complained | ||||||
14334 | // when the template was defined. | ||||||
14335 | } else { | ||||||
14336 | if (!T->isElaboratedTypeSpecifier()) { | ||||||
14337 | // If we evaluated the type to a record type, suggest putting | ||||||
14338 | // a tag in front. | ||||||
14339 | if (const RecordType *RT = T->getAs<RecordType>()) { | ||||||
14340 | RecordDecl *RD = RT->getDecl(); | ||||||
14341 | |||||||
14342 | SmallString<16> InsertionText(" "); | ||||||
14343 | InsertionText += RD->getKindName(); | ||||||
14344 | |||||||
14345 | Diag(TypeRange.getBegin(), | ||||||
14346 | getLangOpts().CPlusPlus11 ? | ||||||
14347 | diag::warn_cxx98_compat_unelaborated_friend_type : | ||||||
14348 | diag::ext_unelaborated_friend_type) | ||||||
14349 | << (unsigned) RD->getTagKind() | ||||||
14350 | << T | ||||||
14351 | << FixItHint::CreateInsertion(getLocForEndOfToken(FriendLoc), | ||||||
14352 | InsertionText); | ||||||
14353 | } else { | ||||||
14354 | Diag(FriendLoc, | ||||||
14355 | getLangOpts().CPlusPlus11 ? | ||||||
14356 | diag::warn_cxx98_compat_nonclass_type_friend : | ||||||
14357 | diag::ext_nonclass_type_friend) | ||||||
14358 | << T | ||||||
14359 | << TypeRange; | ||||||
14360 | } | ||||||
14361 | } else if (T->getAs<EnumType>()) { | ||||||
14362 | Diag(FriendLoc, | ||||||
14363 | getLangOpts().CPlusPlus11 ? | ||||||
14364 | diag::warn_cxx98_compat_enum_friend : | ||||||
14365 | diag::ext_enum_friend) | ||||||
14366 | << T | ||||||
14367 | << TypeRange; | ||||||
14368 | } | ||||||
14369 | |||||||
14370 | // C++11 [class.friend]p3: | ||||||
14371 | // A friend declaration that does not declare a function shall have one | ||||||
14372 | // of the following forms: | ||||||
14373 | // friend elaborated-type-specifier ; | ||||||
14374 | // friend simple-type-specifier ; | ||||||
14375 | // friend typename-specifier ; | ||||||
14376 | if (getLangOpts().CPlusPlus11 && LocStart != FriendLoc) | ||||||
14377 | Diag(FriendLoc, diag::err_friend_not_first_in_declaration) << T; | ||||||
14378 | } | ||||||
14379 | |||||||
14380 | // If the type specifier in a friend declaration designates a (possibly | ||||||
14381 | // cv-qualified) class type, that class is declared as a friend; otherwise, | ||||||
14382 | // the friend declaration is ignored. | ||||||
14383 | return FriendDecl::Create(Context, CurContext, | ||||||
14384 | TSInfo->getTypeLoc().getBeginLoc(), TSInfo, | ||||||
14385 | FriendLoc); | ||||||
14386 | } | ||||||
14387 | |||||||
14388 | /// Handle a friend tag declaration where the scope specifier was | ||||||
14389 | /// templated. | ||||||
14390 | Decl *Sema::ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, | ||||||
14391 | unsigned TagSpec, SourceLocation TagLoc, | ||||||
14392 | CXXScopeSpec &SS, IdentifierInfo *Name, | ||||||
14393 | SourceLocation NameLoc, | ||||||
14394 | const ParsedAttributesView &Attr, | ||||||
14395 | MultiTemplateParamsArg TempParamLists) { | ||||||
14396 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | ||||||
14397 | |||||||
14398 | bool IsMemberSpecialization = false; | ||||||
14399 | bool Invalid = false; | ||||||
14400 | |||||||
14401 | if (TemplateParameterList *TemplateParams = | ||||||
14402 | MatchTemplateParametersToScopeSpecifier( | ||||||
14403 | TagLoc, NameLoc, SS, nullptr, TempParamLists, /*friend*/ true, | ||||||
14404 | IsMemberSpecialization, Invalid)) { | ||||||
14405 | if (TemplateParams->size() > 0) { | ||||||
14406 | // This is a declaration of a class template. | ||||||
14407 | if (Invalid) | ||||||
14408 | return nullptr; | ||||||
14409 | |||||||
14410 | return CheckClassTemplate(S, TagSpec, TUK_Friend, TagLoc, SS, Name, | ||||||
14411 | NameLoc, Attr, TemplateParams, AS_public, | ||||||
14412 | /*ModulePrivateLoc=*/SourceLocation(), | ||||||
14413 | FriendLoc, TempParamLists.size() - 1, | ||||||
14414 | TempParamLists.data()).get(); | ||||||
14415 | } else { | ||||||
14416 | // The "template<>" header is extraneous. | ||||||
14417 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) | ||||||
14418 | << TypeWithKeyword::getTagTypeKindName(Kind) << Name; | ||||||
14419 | IsMemberSpecialization = true; | ||||||
14420 | } | ||||||
14421 | } | ||||||
14422 | |||||||
14423 | if (Invalid) return nullptr; | ||||||
14424 | |||||||
14425 | bool isAllExplicitSpecializations = true; | ||||||
14426 | for (unsigned I = TempParamLists.size(); I-- > 0; ) { | ||||||
14427 | if (TempParamLists[I]->size()) { | ||||||
14428 | isAllExplicitSpecializations = false; | ||||||
14429 | break; | ||||||
14430 | } | ||||||
14431 | } | ||||||
14432 | |||||||
14433 | // FIXME: don't ignore attributes. | ||||||
14434 | |||||||
14435 | // If it's explicit specializations all the way down, just forget | ||||||
14436 | // about the template header and build an appropriate non-templated | ||||||
14437 | // friend. TODO: for source fidelity, remember the headers. | ||||||
14438 | if (isAllExplicitSpecializations) { | ||||||
14439 | if (SS.isEmpty()) { | ||||||
14440 | bool Owned = false; | ||||||
14441 | bool IsDependent = false; | ||||||
14442 | return ActOnTag(S, TagSpec, TUK_Friend, TagLoc, SS, Name, NameLoc, | ||||||
14443 | Attr, AS_public, | ||||||
14444 | /*ModulePrivateLoc=*/SourceLocation(), | ||||||
14445 | MultiTemplateParamsArg(), Owned, IsDependent, | ||||||
14446 | /*ScopedEnumKWLoc=*/SourceLocation(), | ||||||
14447 | /*ScopedEnumUsesClassTag=*/false, | ||||||
14448 | /*UnderlyingType=*/TypeResult(), | ||||||
14449 | /*IsTypeSpecifier=*/false, | ||||||
14450 | /*IsTemplateParamOrArg=*/false); | ||||||
14451 | } | ||||||
14452 | |||||||
14453 | NestedNameSpecifierLoc QualifierLoc = SS.getWithLocInContext(Context); | ||||||
14454 | ElaboratedTypeKeyword Keyword | ||||||
14455 | = TypeWithKeyword::getKeywordForTagTypeKind(Kind); | ||||||
14456 | QualType T = CheckTypenameType(Keyword, TagLoc, QualifierLoc, | ||||||
14457 | *Name, NameLoc); | ||||||
14458 | if (T.isNull()) | ||||||
14459 | return nullptr; | ||||||
14460 | |||||||
14461 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); | ||||||
14462 | if (isa<DependentNameType>(T)) { | ||||||
14463 | DependentNameTypeLoc TL = | ||||||
14464 | TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||||
14465 | TL.setElaboratedKeywordLoc(TagLoc); | ||||||
14466 | TL.setQualifierLoc(QualifierLoc); | ||||||
14467 | TL.setNameLoc(NameLoc); | ||||||
14468 | } else { | ||||||
14469 | ElaboratedTypeLoc TL = TSI->getTypeLoc().castAs<ElaboratedTypeLoc>(); | ||||||
14470 | TL.setElaboratedKeywordLoc(TagLoc); | ||||||
14471 | TL.setQualifierLoc(QualifierLoc); | ||||||
14472 | TL.getNamedTypeLoc().castAs<TypeSpecTypeLoc>().setNameLoc(NameLoc); | ||||||
14473 | } | ||||||
14474 | |||||||
14475 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, NameLoc, | ||||||
14476 | TSI, FriendLoc, TempParamLists); | ||||||
14477 | Friend->setAccess(AS_public); | ||||||
14478 | CurContext->addDecl(Friend); | ||||||
14479 | return Friend; | ||||||
14480 | } | ||||||
14481 | |||||||
14482 | assert(SS.isNotEmpty() && "valid templated tag with no SS and no direct?")((SS.isNotEmpty() && "valid templated tag with no SS and no direct?" ) ? static_cast<void> (0) : __assert_fail ("SS.isNotEmpty() && \"valid templated tag with no SS and no direct?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14482, __PRETTY_FUNCTION__)); | ||||||
14483 | |||||||
14484 | |||||||
14485 | |||||||
14486 | // Handle the case of a templated-scope friend class. e.g. | ||||||
14487 | // template <class T> class A<T>::B; | ||||||
14488 | // FIXME: we don't support these right now. | ||||||
14489 | Diag(NameLoc, diag::warn_template_qualified_friend_unsupported) | ||||||
14490 | << SS.getScopeRep() << SS.getRange() << cast<CXXRecordDecl>(CurContext); | ||||||
14491 | ElaboratedTypeKeyword ETK = TypeWithKeyword::getKeywordForTagTypeKind(Kind); | ||||||
14492 | QualType T = Context.getDependentNameType(ETK, SS.getScopeRep(), Name); | ||||||
14493 | TypeSourceInfo *TSI = Context.CreateTypeSourceInfo(T); | ||||||
14494 | DependentNameTypeLoc TL = TSI->getTypeLoc().castAs<DependentNameTypeLoc>(); | ||||||
14495 | TL.setElaboratedKeywordLoc(TagLoc); | ||||||
14496 | TL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
14497 | TL.setNameLoc(NameLoc); | ||||||
14498 | |||||||
14499 | FriendDecl *Friend = FriendDecl::Create(Context, CurContext, NameLoc, | ||||||
14500 | TSI, FriendLoc, TempParamLists); | ||||||
14501 | Friend->setAccess(AS_public); | ||||||
14502 | Friend->setUnsupportedFriend(true); | ||||||
14503 | CurContext->addDecl(Friend); | ||||||
14504 | return Friend; | ||||||
14505 | } | ||||||
14506 | |||||||
14507 | /// Handle a friend type declaration. This works in tandem with | ||||||
14508 | /// ActOnTag. | ||||||
14509 | /// | ||||||
14510 | /// Notes on friend class templates: | ||||||
14511 | /// | ||||||
14512 | /// We generally treat friend class declarations as if they were | ||||||
14513 | /// declaring a class. So, for example, the elaborated type specifier | ||||||
14514 | /// in a friend declaration is required to obey the restrictions of a | ||||||
14515 | /// class-head (i.e. no typedefs in the scope chain), template | ||||||
14516 | /// parameters are required to match up with simple template-ids, &c. | ||||||
14517 | /// However, unlike when declaring a template specialization, it's | ||||||
14518 | /// okay to refer to a template specialization without an empty | ||||||
14519 | /// template parameter declaration, e.g. | ||||||
14520 | /// friend class A<T>::B<unsigned>; | ||||||
14521 | /// We permit this as a special case; if there are any template | ||||||
14522 | /// parameters present at all, require proper matching, i.e. | ||||||
14523 | /// template <> template \<class T> friend class A<int>::B; | ||||||
14524 | Decl *Sema::ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, | ||||||
14525 | MultiTemplateParamsArg TempParams) { | ||||||
14526 | SourceLocation Loc = DS.getBeginLoc(); | ||||||
14527 | |||||||
14528 | assert(DS.isFriendSpecified())((DS.isFriendSpecified()) ? static_cast<void> (0) : __assert_fail ("DS.isFriendSpecified()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14528, __PRETTY_FUNCTION__)); | ||||||
14529 | assert(DS.getStorageClassSpec() == DeclSpec::SCS_unspecified)((DS.getStorageClassSpec() == DeclSpec::SCS_unspecified) ? static_cast <void> (0) : __assert_fail ("DS.getStorageClassSpec() == DeclSpec::SCS_unspecified" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14529, __PRETTY_FUNCTION__)); | ||||||
14530 | |||||||
14531 | // C++ [class.friend]p3: | ||||||
14532 | // A friend declaration that does not declare a function shall have one of | ||||||
14533 | // the following forms: | ||||||
14534 | // friend elaborated-type-specifier ; | ||||||
14535 | // friend simple-type-specifier ; | ||||||
14536 | // friend typename-specifier ; | ||||||
14537 | // | ||||||
14538 | // Any declaration with a type qualifier does not have that form. (It's | ||||||
14539 | // legal to specify a qualified type as a friend, you just can't write the | ||||||
14540 | // keywords.) | ||||||
14541 | if (DS.getTypeQualifiers()) { | ||||||
14542 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||||
14543 | Diag(DS.getConstSpecLoc(), diag::err_friend_decl_spec) << "const"; | ||||||
14544 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||||
14545 | Diag(DS.getVolatileSpecLoc(), diag::err_friend_decl_spec) << "volatile"; | ||||||
14546 | if (DS.getTypeQualifiers() & DeclSpec::TQ_restrict) | ||||||
14547 | Diag(DS.getRestrictSpecLoc(), diag::err_friend_decl_spec) << "restrict"; | ||||||
14548 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||||
14549 | Diag(DS.getAtomicSpecLoc(), diag::err_friend_decl_spec) << "_Atomic"; | ||||||
14550 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||||
14551 | Diag(DS.getUnalignedSpecLoc(), diag::err_friend_decl_spec) << "__unaligned"; | ||||||
14552 | } | ||||||
14553 | |||||||
14554 | // Try to convert the decl specifier to a type. This works for | ||||||
14555 | // friend templates because ActOnTag never produces a ClassTemplateDecl | ||||||
14556 | // for a TUK_Friend. | ||||||
14557 | Declarator TheDeclarator(DS, DeclaratorContext::MemberContext); | ||||||
14558 | TypeSourceInfo *TSI = GetTypeForDeclarator(TheDeclarator, S); | ||||||
14559 | QualType T = TSI->getType(); | ||||||
14560 | if (TheDeclarator.isInvalidType()) | ||||||
14561 | return nullptr; | ||||||
14562 | |||||||
14563 | if (DiagnoseUnexpandedParameterPack(Loc, TSI, UPPC_FriendDeclaration)) | ||||||
14564 | return nullptr; | ||||||
14565 | |||||||
14566 | // This is definitely an error in C++98. It's probably meant to | ||||||
14567 | // be forbidden in C++0x, too, but the specification is just | ||||||
14568 | // poorly written. | ||||||
14569 | // | ||||||
14570 | // The problem is with declarations like the following: | ||||||
14571 | // template <T> friend A<T>::foo; | ||||||
14572 | // where deciding whether a class C is a friend or not now hinges | ||||||
14573 | // on whether there exists an instantiation of A that causes | ||||||
14574 | // 'foo' to equal C. There are restrictions on class-heads | ||||||
14575 | // (which we declare (by fiat) elaborated friend declarations to | ||||||
14576 | // be) that makes this tractable. | ||||||
14577 | // | ||||||
14578 | // FIXME: handle "template <> friend class A<T>;", which | ||||||
14579 | // is possibly well-formed? Who even knows? | ||||||
14580 | if (TempParams.size() && !T->isElaboratedTypeSpecifier()) { | ||||||
14581 | Diag(Loc, diag::err_tagless_friend_type_template) | ||||||
14582 | << DS.getSourceRange(); | ||||||
14583 | return nullptr; | ||||||
14584 | } | ||||||
14585 | |||||||
14586 | // C++98 [class.friend]p1: A friend of a class is a function | ||||||
14587 | // or class that is not a member of the class . . . | ||||||
14588 | // This is fixed in DR77, which just barely didn't make the C++03 | ||||||
14589 | // deadline. It's also a very silly restriction that seriously | ||||||
14590 | // affects inner classes and which nobody else seems to implement; | ||||||
14591 | // thus we never diagnose it, not even in -pedantic. | ||||||
14592 | // | ||||||
14593 | // But note that we could warn about it: it's always useless to | ||||||
14594 | // friend one of your own members (it's not, however, worthless to | ||||||
14595 | // friend a member of an arbitrary specialization of your template). | ||||||
14596 | |||||||
14597 | Decl *D; | ||||||
14598 | if (!TempParams.empty()) | ||||||
14599 | D = FriendTemplateDecl::Create(Context, CurContext, Loc, | ||||||
14600 | TempParams, | ||||||
14601 | TSI, | ||||||
14602 | DS.getFriendSpecLoc()); | ||||||
14603 | else | ||||||
14604 | D = CheckFriendTypeDecl(Loc, DS.getFriendSpecLoc(), TSI); | ||||||
14605 | |||||||
14606 | if (!D) | ||||||
14607 | return nullptr; | ||||||
14608 | |||||||
14609 | D->setAccess(AS_public); | ||||||
14610 | CurContext->addDecl(D); | ||||||
14611 | |||||||
14612 | return D; | ||||||
14613 | } | ||||||
14614 | |||||||
14615 | NamedDecl *Sema::ActOnFriendFunctionDecl(Scope *S, Declarator &D, | ||||||
14616 | MultiTemplateParamsArg TemplateParams) { | ||||||
14617 | const DeclSpec &DS = D.getDeclSpec(); | ||||||
14618 | |||||||
14619 | assert(DS.isFriendSpecified())((DS.isFriendSpecified()) ? static_cast<void> (0) : __assert_fail ("DS.isFriendSpecified()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14619, __PRETTY_FUNCTION__)); | ||||||
14620 | assert(DS.getStorageClassSpec() == DeclSpec::SCS_unspecified)((DS.getStorageClassSpec() == DeclSpec::SCS_unspecified) ? static_cast <void> (0) : __assert_fail ("DS.getStorageClassSpec() == DeclSpec::SCS_unspecified" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14620, __PRETTY_FUNCTION__)); | ||||||
14621 | |||||||
14622 | SourceLocation Loc = D.getIdentifierLoc(); | ||||||
14623 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
14624 | |||||||
14625 | // C++ [class.friend]p1 | ||||||
14626 | // A friend of a class is a function or class.... | ||||||
14627 | // Note that this sees through typedefs, which is intended. | ||||||
14628 | // It *doesn't* see through dependent types, which is correct | ||||||
14629 | // according to [temp.arg.type]p3: | ||||||
14630 | // If a declaration acquires a function type through a | ||||||
14631 | // type dependent on a template-parameter and this causes | ||||||
14632 | // a declaration that does not use the syntactic form of a | ||||||
14633 | // function declarator to have a function type, the program | ||||||
14634 | // is ill-formed. | ||||||
14635 | if (!TInfo->getType()->isFunctionType()) { | ||||||
14636 | Diag(Loc, diag::err_unexpected_friend); | ||||||
14637 | |||||||
14638 | // It might be worthwhile to try to recover by creating an | ||||||
14639 | // appropriate declaration. | ||||||
14640 | return nullptr; | ||||||
14641 | } | ||||||
14642 | |||||||
14643 | // C++ [namespace.memdef]p3 | ||||||
14644 | // - If a friend declaration in a non-local class first declares a | ||||||
14645 | // class or function, the friend class or function is a member | ||||||
14646 | // of the innermost enclosing namespace. | ||||||
14647 | // - The name of the friend is not found by simple name lookup | ||||||
14648 | // until a matching declaration is provided in that namespace | ||||||
14649 | // scope (either before or after the class declaration granting | ||||||
14650 | // friendship). | ||||||
14651 | // - If a friend function is called, its name may be found by the | ||||||
14652 | // name lookup that considers functions from namespaces and | ||||||
14653 | // classes associated with the types of the function arguments. | ||||||
14654 | // - When looking for a prior declaration of a class or a function | ||||||
14655 | // declared as a friend, scopes outside the innermost enclosing | ||||||
14656 | // namespace scope are not considered. | ||||||
14657 | |||||||
14658 | CXXScopeSpec &SS = D.getCXXScopeSpec(); | ||||||
14659 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||
14660 | assert(NameInfo.getName())((NameInfo.getName()) ? static_cast<void> (0) : __assert_fail ("NameInfo.getName()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14660, __PRETTY_FUNCTION__)); | ||||||
14661 | |||||||
14662 | // Check for unexpanded parameter packs. | ||||||
14663 | if (DiagnoseUnexpandedParameterPack(Loc, TInfo, UPPC_FriendDeclaration) || | ||||||
14664 | DiagnoseUnexpandedParameterPack(NameInfo, UPPC_FriendDeclaration) || | ||||||
14665 | DiagnoseUnexpandedParameterPack(SS, UPPC_FriendDeclaration)) | ||||||
14666 | return nullptr; | ||||||
14667 | |||||||
14668 | // The context we found the declaration in, or in which we should | ||||||
14669 | // create the declaration. | ||||||
14670 | DeclContext *DC; | ||||||
14671 | Scope *DCScope = S; | ||||||
14672 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||
14673 | ForExternalRedeclaration); | ||||||
14674 | |||||||
14675 | // There are five cases here. | ||||||
14676 | // - There's no scope specifier and we're in a local class. Only look | ||||||
14677 | // for functions declared in the immediately-enclosing block scope. | ||||||
14678 | // We recover from invalid scope qualifiers as if they just weren't there. | ||||||
14679 | FunctionDecl *FunctionContainingLocalClass = nullptr; | ||||||
14680 | if ((SS.isInvalid() || !SS.isSet()) && | ||||||
14681 | (FunctionContainingLocalClass = | ||||||
14682 | cast<CXXRecordDecl>(CurContext)->isLocalClass())) { | ||||||
14683 | // C++11 [class.friend]p11: | ||||||
14684 | // If a friend declaration appears in a local class and the name | ||||||
14685 | // specified is an unqualified name, a prior declaration is | ||||||
14686 | // looked up without considering scopes that are outside the | ||||||
14687 | // innermost enclosing non-class scope. For a friend function | ||||||
14688 | // declaration, if there is no prior declaration, the program is | ||||||
14689 | // ill-formed. | ||||||
14690 | |||||||
14691 | // Find the innermost enclosing non-class scope. This is the block | ||||||
14692 | // scope containing the local class definition (or for a nested class, | ||||||
14693 | // the outer local class). | ||||||
14694 | DCScope = S->getFnParent(); | ||||||
14695 | |||||||
14696 | // Look up the function name in the scope. | ||||||
14697 | Previous.clear(LookupLocalFriendName); | ||||||
14698 | LookupName(Previous, S, /*AllowBuiltinCreation*/false); | ||||||
14699 | |||||||
14700 | if (!Previous.empty()) { | ||||||
14701 | // All possible previous declarations must have the same context: | ||||||
14702 | // either they were declared at block scope or they are members of | ||||||
14703 | // one of the enclosing local classes. | ||||||
14704 | DC = Previous.getRepresentativeDecl()->getDeclContext(); | ||||||
14705 | } else { | ||||||
14706 | // This is ill-formed, but provide the context that we would have | ||||||
14707 | // declared the function in, if we were permitted to, for error recovery. | ||||||
14708 | DC = FunctionContainingLocalClass; | ||||||
14709 | } | ||||||
14710 | adjustContextForLocalExternDecl(DC); | ||||||
14711 | |||||||
14712 | // C++ [class.friend]p6: | ||||||
14713 | // A function can be defined in a friend declaration of a class if and | ||||||
14714 | // only if the class is a non-local class (9.8), the function name is | ||||||
14715 | // unqualified, and the function has namespace scope. | ||||||
14716 | if (D.isFunctionDefinition()) { | ||||||
14717 | Diag(NameInfo.getBeginLoc(), diag::err_friend_def_in_local_class); | ||||||
14718 | } | ||||||
14719 | |||||||
14720 | // - There's no scope specifier, in which case we just go to the | ||||||
14721 | // appropriate scope and look for a function or function template | ||||||
14722 | // there as appropriate. | ||||||
14723 | } else if (SS.isInvalid() || !SS.isSet()) { | ||||||
14724 | // C++11 [namespace.memdef]p3: | ||||||
14725 | // If the name in a friend declaration is neither qualified nor | ||||||
14726 | // a template-id and the declaration is a function or an | ||||||
14727 | // elaborated-type-specifier, the lookup to determine whether | ||||||
14728 | // the entity has been previously declared shall not consider | ||||||
14729 | // any scopes outside the innermost enclosing namespace. | ||||||
14730 | bool isTemplateId = | ||||||
14731 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId; | ||||||
14732 | |||||||
14733 | // Find the appropriate context according to the above. | ||||||
14734 | DC = CurContext; | ||||||
14735 | |||||||
14736 | // Skip class contexts. If someone can cite chapter and verse | ||||||
14737 | // for this behavior, that would be nice --- it's what GCC and | ||||||
14738 | // EDG do, and it seems like a reasonable intent, but the spec | ||||||
14739 | // really only says that checks for unqualified existing | ||||||
14740 | // declarations should stop at the nearest enclosing namespace, | ||||||
14741 | // not that they should only consider the nearest enclosing | ||||||
14742 | // namespace. | ||||||
14743 | while (DC->isRecord()) | ||||||
14744 | DC = DC->getParent(); | ||||||
14745 | |||||||
14746 | DeclContext *LookupDC = DC; | ||||||
14747 | while (LookupDC->isTransparentContext()) | ||||||
14748 | LookupDC = LookupDC->getParent(); | ||||||
14749 | |||||||
14750 | while (true) { | ||||||
14751 | LookupQualifiedName(Previous, LookupDC); | ||||||
14752 | |||||||
14753 | if (!Previous.empty()) { | ||||||
14754 | DC = LookupDC; | ||||||
14755 | break; | ||||||
14756 | } | ||||||
14757 | |||||||
14758 | if (isTemplateId) { | ||||||
14759 | if (isa<TranslationUnitDecl>(LookupDC)) break; | ||||||
14760 | } else { | ||||||
14761 | if (LookupDC->isFileContext()) break; | ||||||
14762 | } | ||||||
14763 | LookupDC = LookupDC->getParent(); | ||||||
14764 | } | ||||||
14765 | |||||||
14766 | DCScope = getScopeForDeclContext(S, DC); | ||||||
14767 | |||||||
14768 | // - There's a non-dependent scope specifier, in which case we | ||||||
14769 | // compute it and do a previous lookup there for a function | ||||||
14770 | // or function template. | ||||||
14771 | } else if (!SS.getScopeRep()->isDependent()) { | ||||||
14772 | DC = computeDeclContext(SS); | ||||||
14773 | if (!DC) return nullptr; | ||||||
14774 | |||||||
14775 | if (RequireCompleteDeclContext(SS, DC)) return nullptr; | ||||||
14776 | |||||||
14777 | LookupQualifiedName(Previous, DC); | ||||||
14778 | |||||||
14779 | // C++ [class.friend]p1: A friend of a class is a function or | ||||||
14780 | // class that is not a member of the class . . . | ||||||
14781 | if (DC->Equals(CurContext)) | ||||||
14782 | Diag(DS.getFriendSpecLoc(), | ||||||
14783 | getLangOpts().CPlusPlus11 ? | ||||||
14784 | diag::warn_cxx98_compat_friend_is_member : | ||||||
14785 | diag::err_friend_is_member); | ||||||
14786 | |||||||
14787 | if (D.isFunctionDefinition()) { | ||||||
14788 | // C++ [class.friend]p6: | ||||||
14789 | // A function can be defined in a friend declaration of a class if and | ||||||
14790 | // only if the class is a non-local class (9.8), the function name is | ||||||
14791 | // unqualified, and the function has namespace scope. | ||||||
14792 | // | ||||||
14793 | // FIXME: We should only do this if the scope specifier names the | ||||||
14794 | // innermost enclosing namespace; otherwise the fixit changes the | ||||||
14795 | // meaning of the code. | ||||||
14796 | SemaDiagnosticBuilder DB | ||||||
14797 | = Diag(SS.getRange().getBegin(), diag::err_qualified_friend_def); | ||||||
14798 | |||||||
14799 | DB << SS.getScopeRep(); | ||||||
14800 | if (DC->isFileContext()) | ||||||
14801 | DB << FixItHint::CreateRemoval(SS.getRange()); | ||||||
14802 | SS.clear(); | ||||||
14803 | } | ||||||
14804 | |||||||
14805 | // - There's a scope specifier that does not match any template | ||||||
14806 | // parameter lists, in which case we use some arbitrary context, | ||||||
14807 | // create a method or method template, and wait for instantiation. | ||||||
14808 | // - There's a scope specifier that does match some template | ||||||
14809 | // parameter lists, which we don't handle right now. | ||||||
14810 | } else { | ||||||
14811 | if (D.isFunctionDefinition()) { | ||||||
14812 | // C++ [class.friend]p6: | ||||||
14813 | // A function can be defined in a friend declaration of a class if and | ||||||
14814 | // only if the class is a non-local class (9.8), the function name is | ||||||
14815 | // unqualified, and the function has namespace scope. | ||||||
14816 | Diag(SS.getRange().getBegin(), diag::err_qualified_friend_def) | ||||||
14817 | << SS.getScopeRep(); | ||||||
14818 | } | ||||||
14819 | |||||||
14820 | DC = CurContext; | ||||||
14821 | assert(isa<CXXRecordDecl>(DC) && "friend declaration not in class?")((isa<CXXRecordDecl>(DC) && "friend declaration not in class?" ) ? static_cast<void> (0) : __assert_fail ("isa<CXXRecordDecl>(DC) && \"friend declaration not in class?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14821, __PRETTY_FUNCTION__)); | ||||||
14822 | } | ||||||
14823 | |||||||
14824 | if (!DC->isRecord()) { | ||||||
14825 | int DiagArg = -1; | ||||||
14826 | switch (D.getName().getKind()) { | ||||||
14827 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||||
14828 | case UnqualifiedIdKind::IK_ConstructorName: | ||||||
14829 | DiagArg = 0; | ||||||
14830 | break; | ||||||
14831 | case UnqualifiedIdKind::IK_DestructorName: | ||||||
14832 | DiagArg = 1; | ||||||
14833 | break; | ||||||
14834 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||||
14835 | DiagArg = 2; | ||||||
14836 | break; | ||||||
14837 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||||
14838 | DiagArg = 3; | ||||||
14839 | break; | ||||||
14840 | case UnqualifiedIdKind::IK_Identifier: | ||||||
14841 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||
14842 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||
14843 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||
14844 | case UnqualifiedIdKind::IK_TemplateId: | ||||||
14845 | break; | ||||||
14846 | } | ||||||
14847 | // This implies that it has to be an operator or function. | ||||||
14848 | if (DiagArg >= 0) { | ||||||
14849 | Diag(Loc, diag::err_introducing_special_friend) << DiagArg; | ||||||
14850 | return nullptr; | ||||||
14851 | } | ||||||
14852 | } | ||||||
14853 | |||||||
14854 | // FIXME: This is an egregious hack to cope with cases where the scope stack | ||||||
14855 | // does not contain the declaration context, i.e., in an out-of-line | ||||||
14856 | // definition of a class. | ||||||
14857 | Scope FakeDCScope(S, Scope::DeclScope, Diags); | ||||||
14858 | if (!DCScope) { | ||||||
14859 | FakeDCScope.setEntity(DC); | ||||||
14860 | DCScope = &FakeDCScope; | ||||||
14861 | } | ||||||
14862 | |||||||
14863 | bool AddToScope = true; | ||||||
14864 | NamedDecl *ND = ActOnFunctionDeclarator(DCScope, D, DC, TInfo, Previous, | ||||||
14865 | TemplateParams, AddToScope); | ||||||
14866 | if (!ND) return nullptr; | ||||||
14867 | |||||||
14868 | assert(ND->getLexicalDeclContext() == CurContext)((ND->getLexicalDeclContext() == CurContext) ? static_cast <void> (0) : __assert_fail ("ND->getLexicalDeclContext() == CurContext" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 14868, __PRETTY_FUNCTION__)); | ||||||
14869 | |||||||
14870 | // If we performed typo correction, we might have added a scope specifier | ||||||
14871 | // and changed the decl context. | ||||||
14872 | DC = ND->getDeclContext(); | ||||||
14873 | |||||||
14874 | // Add the function declaration to the appropriate lookup tables, | ||||||
14875 | // adjusting the redeclarations list as necessary. We don't | ||||||
14876 | // want to do this yet if the friending class is dependent. | ||||||
14877 | // | ||||||
14878 | // Also update the scope-based lookup if the target context's | ||||||
14879 | // lookup context is in lexical scope. | ||||||
14880 | if (!CurContext->isDependentContext()) { | ||||||
14881 | DC = DC->getRedeclContext(); | ||||||
14882 | DC->makeDeclVisibleInContext(ND); | ||||||
14883 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) | ||||||
14884 | PushOnScopeChains(ND, EnclosingScope, /*AddToContext=*/ false); | ||||||
14885 | } | ||||||
14886 | |||||||
14887 | FriendDecl *FrD = FriendDecl::Create(Context, CurContext, | ||||||
14888 | D.getIdentifierLoc(), ND, | ||||||
14889 | DS.getFriendSpecLoc()); | ||||||
14890 | FrD->setAccess(AS_public); | ||||||
14891 | CurContext->addDecl(FrD); | ||||||
14892 | |||||||
14893 | if (ND->isInvalidDecl()) { | ||||||
14894 | FrD->setInvalidDecl(); | ||||||
14895 | } else { | ||||||
14896 | if (DC->isRecord()) CheckFriendAccess(ND); | ||||||
14897 | |||||||
14898 | FunctionDecl *FD; | ||||||
14899 | if (FunctionTemplateDecl *FTD = dyn_cast<FunctionTemplateDecl>(ND)) | ||||||
14900 | FD = FTD->getTemplatedDecl(); | ||||||
14901 | else | ||||||
14902 | FD = cast<FunctionDecl>(ND); | ||||||
14903 | |||||||
14904 | // C++11 [dcl.fct.default]p4: If a friend declaration specifies a | ||||||
14905 | // default argument expression, that declaration shall be a definition | ||||||
14906 | // and shall be the only declaration of the function or function | ||||||
14907 | // template in the translation unit. | ||||||
14908 | if (functionDeclHasDefaultArgument(FD)) { | ||||||
14909 | // We can't look at FD->getPreviousDecl() because it may not have been set | ||||||
14910 | // if we're in a dependent context. If the function is known to be a | ||||||
14911 | // redeclaration, we will have narrowed Previous down to the right decl. | ||||||
14912 | if (D.isRedeclaration()) { | ||||||
14913 | Diag(FD->getLocation(), diag::err_friend_decl_with_def_arg_redeclared); | ||||||
14914 | Diag(Previous.getRepresentativeDecl()->getLocation(), | ||||||
14915 | diag::note_previous_declaration); | ||||||
14916 | } else if (!D.isFunctionDefinition()) | ||||||
14917 | Diag(FD->getLocation(), diag::err_friend_decl_with_def_arg_must_be_def); | ||||||
14918 | } | ||||||
14919 | |||||||
14920 | // Mark templated-scope function declarations as unsupported. | ||||||
14921 | if (FD->getNumTemplateParameterLists() && SS.isValid()) { | ||||||
14922 | Diag(FD->getLocation(), diag::warn_template_qualified_friend_unsupported) | ||||||
14923 | << SS.getScopeRep() << SS.getRange() | ||||||
14924 | << cast<CXXRecordDecl>(CurContext); | ||||||
14925 | FrD->setUnsupportedFriend(true); | ||||||
14926 | } | ||||||
14927 | } | ||||||
14928 | |||||||
14929 | return ND; | ||||||
14930 | } | ||||||
14931 | |||||||
14932 | void Sema::SetDeclDeleted(Decl *Dcl, SourceLocation DelLoc) { | ||||||
14933 | AdjustDeclIfTemplate(Dcl); | ||||||
14934 | |||||||
14935 | FunctionDecl *Fn = dyn_cast_or_null<FunctionDecl>(Dcl); | ||||||
14936 | if (!Fn) { | ||||||
14937 | Diag(DelLoc, diag::err_deleted_non_function); | ||||||
14938 | return; | ||||||
14939 | } | ||||||
14940 | |||||||
14941 | // Deleted function does not have a body. | ||||||
14942 | Fn->setWillHaveBody(false); | ||||||
14943 | |||||||
14944 | if (const FunctionDecl *Prev = Fn->getPreviousDecl()) { | ||||||
14945 | // Don't consider the implicit declaration we generate for explicit | ||||||
14946 | // specializations. FIXME: Do not generate these implicit declarations. | ||||||
14947 | if ((Prev->getTemplateSpecializationKind() != TSK_ExplicitSpecialization || | ||||||
14948 | Prev->getPreviousDecl()) && | ||||||
14949 | !Prev->isDefined()) { | ||||||
14950 | Diag(DelLoc, diag::err_deleted_decl_not_first); | ||||||
14951 | Diag(Prev->getLocation().isInvalid() ? DelLoc : Prev->getLocation(), | ||||||
14952 | Prev->isImplicit() ? diag::note_previous_implicit_declaration | ||||||
14953 | : diag::note_previous_declaration); | ||||||
14954 | } | ||||||
14955 | // If the declaration wasn't the first, we delete the function anyway for | ||||||
14956 | // recovery. | ||||||
14957 | Fn = Fn->getCanonicalDecl(); | ||||||
14958 | } | ||||||
14959 | |||||||
14960 | // dllimport/dllexport cannot be deleted. | ||||||
14961 | if (const InheritableAttr *DLLAttr = getDLLAttr(Fn)) { | ||||||
14962 | Diag(Fn->getLocation(), diag::err_attribute_dll_deleted) << DLLAttr; | ||||||
14963 | Fn->setInvalidDecl(); | ||||||
14964 | } | ||||||
14965 | |||||||
14966 | if (Fn->isDeleted()) | ||||||
14967 | return; | ||||||
14968 | |||||||
14969 | // See if we're deleting a function which is already known to override a | ||||||
14970 | // non-deleted virtual function. | ||||||
14971 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Fn)) { | ||||||
14972 | bool IssuedDiagnostic = false; | ||||||
14973 | for (const CXXMethodDecl *O : MD->overridden_methods()) { | ||||||
14974 | if (!(*MD->begin_overridden_methods())->isDeleted()) { | ||||||
14975 | if (!IssuedDiagnostic) { | ||||||
14976 | Diag(DelLoc, diag::err_deleted_override) << MD->getDeclName(); | ||||||
14977 | IssuedDiagnostic = true; | ||||||
14978 | } | ||||||
14979 | Diag(O->getLocation(), diag::note_overridden_virtual_function); | ||||||
14980 | } | ||||||
14981 | } | ||||||
14982 | // If this function was implicitly deleted because it was defaulted, | ||||||
14983 | // explain why it was deleted. | ||||||
14984 | if (IssuedDiagnostic && MD->isDefaulted()) | ||||||
14985 | ShouldDeleteSpecialMember(MD, getSpecialMember(MD), nullptr, | ||||||
14986 | /*Diagnose*/true); | ||||||
14987 | } | ||||||
14988 | |||||||
14989 | // C++11 [basic.start.main]p3: | ||||||
14990 | // A program that defines main as deleted [...] is ill-formed. | ||||||
14991 | if (Fn->isMain()) | ||||||
14992 | Diag(DelLoc, diag::err_deleted_main); | ||||||
14993 | |||||||
14994 | // C++11 [dcl.fct.def.delete]p4: | ||||||
14995 | // A deleted function is implicitly inline. | ||||||
14996 | Fn->setImplicitlyInline(); | ||||||
14997 | Fn->setDeletedAsWritten(); | ||||||
14998 | } | ||||||
14999 | |||||||
15000 | void Sema::SetDeclDefaulted(Decl *Dcl, SourceLocation DefaultLoc) { | ||||||
15001 | CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(Dcl); | ||||||
15002 | |||||||
15003 | if (MD) { | ||||||
15004 | if (MD->getParent()->isDependentType()) { | ||||||
15005 | MD->setDefaulted(); | ||||||
15006 | MD->setExplicitlyDefaulted(); | ||||||
15007 | return; | ||||||
15008 | } | ||||||
15009 | |||||||
15010 | CXXSpecialMember Member = getSpecialMember(MD); | ||||||
15011 | if (Member == CXXInvalid) { | ||||||
15012 | if (!MD->isInvalidDecl()) | ||||||
15013 | Diag(DefaultLoc, diag::err_default_special_members); | ||||||
15014 | return; | ||||||
15015 | } | ||||||
15016 | |||||||
15017 | MD->setDefaulted(); | ||||||
15018 | MD->setExplicitlyDefaulted(); | ||||||
15019 | |||||||
15020 | // Unset that we will have a body for this function. We might not, | ||||||
15021 | // if it turns out to be trivial, and we don't need this marking now | ||||||
15022 | // that we've marked it as defaulted. | ||||||
15023 | MD->setWillHaveBody(false); | ||||||
15024 | |||||||
15025 | // If this definition appears within the record, do the checking when | ||||||
15026 | // the record is complete. | ||||||
15027 | const FunctionDecl *Primary = MD; | ||||||
15028 | if (const FunctionDecl *Pattern = MD->getTemplateInstantiationPattern()) | ||||||
15029 | // Ask the template instantiation pattern that actually had the | ||||||
15030 | // '= default' on it. | ||||||
15031 | Primary = Pattern; | ||||||
15032 | |||||||
15033 | // If the method was defaulted on its first declaration, we will have | ||||||
15034 | // already performed the checking in CheckCompletedCXXClass. Such a | ||||||
15035 | // declaration doesn't trigger an implicit definition. | ||||||
15036 | if (Primary->getCanonicalDecl()->isDefaulted()) | ||||||
15037 | return; | ||||||
15038 | |||||||
15039 | CheckExplicitlyDefaultedSpecialMember(MD); | ||||||
15040 | |||||||
15041 | if (!MD->isInvalidDecl()) | ||||||
15042 | DefineImplicitSpecialMember(*this, MD, DefaultLoc); | ||||||
15043 | } else { | ||||||
15044 | Diag(DefaultLoc, diag::err_default_special_members); | ||||||
15045 | } | ||||||
15046 | } | ||||||
15047 | |||||||
15048 | static void SearchForReturnInStmt(Sema &Self, Stmt *S) { | ||||||
15049 | for (Stmt *SubStmt : S->children()) { | ||||||
15050 | if (!SubStmt) | ||||||
15051 | continue; | ||||||
15052 | if (isa<ReturnStmt>(SubStmt)) | ||||||
15053 | Self.Diag(SubStmt->getBeginLoc(), | ||||||
15054 | diag::err_return_in_constructor_handler); | ||||||
15055 | if (!isa<Expr>(SubStmt)) | ||||||
15056 | SearchForReturnInStmt(Self, SubStmt); | ||||||
15057 | } | ||||||
15058 | } | ||||||
15059 | |||||||
15060 | void Sema::DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock) { | ||||||
15061 | for (unsigned I = 0, E = TryBlock->getNumHandlers(); I != E; ++I) { | ||||||
15062 | CXXCatchStmt *Handler = TryBlock->getHandler(I); | ||||||
15063 | SearchForReturnInStmt(*this, Handler); | ||||||
15064 | } | ||||||
15065 | } | ||||||
15066 | |||||||
15067 | bool Sema::CheckOverridingFunctionAttributes(const CXXMethodDecl *New, | ||||||
15068 | const CXXMethodDecl *Old) { | ||||||
15069 | const auto *NewFT = New->getType()->getAs<FunctionProtoType>(); | ||||||
15070 | const auto *OldFT = Old->getType()->getAs<FunctionProtoType>(); | ||||||
15071 | |||||||
15072 | if (OldFT->hasExtParameterInfos()) { | ||||||
15073 | for (unsigned I = 0, E = OldFT->getNumParams(); I != E; ++I) | ||||||
15074 | // A parameter of the overriding method should be annotated with noescape | ||||||
15075 | // if the corresponding parameter of the overridden method is annotated. | ||||||
15076 | if (OldFT->getExtParameterInfo(I).isNoEscape() && | ||||||
15077 | !NewFT->getExtParameterInfo(I).isNoEscape()) { | ||||||
15078 | Diag(New->getParamDecl(I)->getLocation(), | ||||||
15079 | diag::warn_overriding_method_missing_noescape); | ||||||
15080 | Diag(Old->getParamDecl(I)->getLocation(), | ||||||
15081 | diag::note_overridden_marked_noescape); | ||||||
15082 | } | ||||||
15083 | } | ||||||
15084 | |||||||
15085 | // Virtual overrides must have the same code_seg. | ||||||
15086 | const auto *OldCSA = Old->getAttr<CodeSegAttr>(); | ||||||
15087 | const auto *NewCSA = New->getAttr<CodeSegAttr>(); | ||||||
15088 | if ((NewCSA || OldCSA) && | ||||||
15089 | (!OldCSA || !NewCSA || NewCSA->getName() != OldCSA->getName())) { | ||||||
15090 | Diag(New->getLocation(), diag::err_mismatched_code_seg_override); | ||||||
15091 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
15092 | return true; | ||||||
15093 | } | ||||||
15094 | |||||||
15095 | CallingConv NewCC = NewFT->getCallConv(), OldCC = OldFT->getCallConv(); | ||||||
15096 | |||||||
15097 | // If the calling conventions match, everything is fine | ||||||
15098 | if (NewCC == OldCC) | ||||||
15099 | return false; | ||||||
15100 | |||||||
15101 | // If the calling conventions mismatch because the new function is static, | ||||||
15102 | // suppress the calling convention mismatch error; the error about static | ||||||
15103 | // function override (err_static_overrides_virtual from | ||||||
15104 | // Sema::CheckFunctionDeclaration) is more clear. | ||||||
15105 | if (New->getStorageClass() == SC_Static) | ||||||
15106 | return false; | ||||||
15107 | |||||||
15108 | Diag(New->getLocation(), | ||||||
15109 | diag::err_conflicting_overriding_cc_attributes) | ||||||
15110 | << New->getDeclName() << New->getType() << Old->getType(); | ||||||
15111 | Diag(Old->getLocation(), diag::note_overridden_virtual_function); | ||||||
15112 | return true; | ||||||
15113 | } | ||||||
15114 | |||||||
15115 | bool Sema::CheckOverridingFunctionReturnType(const CXXMethodDecl *New, | ||||||
15116 | const CXXMethodDecl *Old) { | ||||||
15117 | QualType NewTy = New->getType()->getAs<FunctionType>()->getReturnType(); | ||||||
15118 | QualType OldTy = Old->getType()->getAs<FunctionType>()->getReturnType(); | ||||||
15119 | |||||||
15120 | if (Context.hasSameType(NewTy, OldTy) || | ||||||
15121 | NewTy->isDependentType() || OldTy->isDependentType()) | ||||||
15122 | return false; | ||||||
15123 | |||||||
15124 | // Check if the return types are covariant | ||||||
15125 | QualType NewClassTy, OldClassTy; | ||||||
15126 | |||||||
15127 | /// Both types must be pointers or references to classes. | ||||||
15128 | if (const PointerType *NewPT = NewTy->getAs<PointerType>()) { | ||||||
15129 | if (const PointerType *OldPT = OldTy->getAs<PointerType>()) { | ||||||
15130 | NewClassTy = NewPT->getPointeeType(); | ||||||
15131 | OldClassTy = OldPT->getPointeeType(); | ||||||
15132 | } | ||||||
15133 | } else if (const ReferenceType *NewRT = NewTy->getAs<ReferenceType>()) { | ||||||
15134 | if (const ReferenceType *OldRT = OldTy->getAs<ReferenceType>()) { | ||||||
15135 | if (NewRT->getTypeClass() == OldRT->getTypeClass()) { | ||||||
15136 | NewClassTy = NewRT->getPointeeType(); | ||||||
15137 | OldClassTy = OldRT->getPointeeType(); | ||||||
15138 | } | ||||||
15139 | } | ||||||
15140 | } | ||||||
15141 | |||||||
15142 | // The return types aren't either both pointers or references to a class type. | ||||||
15143 | if (NewClassTy.isNull()) { | ||||||
15144 | Diag(New->getLocation(), | ||||||
15145 | diag::err_different_return_type_for_overriding_virtual_function) | ||||||
15146 | << New->getDeclName() << NewTy << OldTy | ||||||
15147 | << New->getReturnTypeSourceRange(); | ||||||
15148 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||
15149 | << Old->getReturnTypeSourceRange(); | ||||||
15150 | |||||||
15151 | return true; | ||||||
15152 | } | ||||||
15153 | |||||||
15154 | if (!Context.hasSameUnqualifiedType(NewClassTy, OldClassTy)) { | ||||||
15155 | // C++14 [class.virtual]p8: | ||||||
15156 | // If the class type in the covariant return type of D::f differs from | ||||||
15157 | // that of B::f, the class type in the return type of D::f shall be | ||||||
15158 | // complete at the point of declaration of D::f or shall be the class | ||||||
15159 | // type D. | ||||||
15160 | if (const RecordType *RT = NewClassTy->getAs<RecordType>()) { | ||||||
15161 | if (!RT->isBeingDefined() && | ||||||
15162 | RequireCompleteType(New->getLocation(), NewClassTy, | ||||||
15163 | diag::err_covariant_return_incomplete, | ||||||
15164 | New->getDeclName())) | ||||||
15165 | return true; | ||||||
15166 | } | ||||||
15167 | |||||||
15168 | // Check if the new class derives from the old class. | ||||||
15169 | if (!IsDerivedFrom(New->getLocation(), NewClassTy, OldClassTy)) { | ||||||
15170 | Diag(New->getLocation(), diag::err_covariant_return_not_derived) | ||||||
15171 | << New->getDeclName() << NewTy << OldTy | ||||||
15172 | << New->getReturnTypeSourceRange(); | ||||||
15173 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||
15174 | << Old->getReturnTypeSourceRange(); | ||||||
15175 | return true; | ||||||
15176 | } | ||||||
15177 | |||||||
15178 | // Check if we the conversion from derived to base is valid. | ||||||
15179 | if (CheckDerivedToBaseConversion( | ||||||
15180 | NewClassTy, OldClassTy, | ||||||
15181 | diag::err_covariant_return_inaccessible_base, | ||||||
15182 | diag::err_covariant_return_ambiguous_derived_to_base_conv, | ||||||
15183 | New->getLocation(), New->getReturnTypeSourceRange(), | ||||||
15184 | New->getDeclName(), nullptr)) { | ||||||
15185 | // FIXME: this note won't trigger for delayed access control | ||||||
15186 | // diagnostics, and it's impossible to get an undelayed error | ||||||
15187 | // here from access control during the original parse because | ||||||
15188 | // the ParsingDeclSpec/ParsingDeclarator are still in scope. | ||||||
15189 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||
15190 | << Old->getReturnTypeSourceRange(); | ||||||
15191 | return true; | ||||||
15192 | } | ||||||
15193 | } | ||||||
15194 | |||||||
15195 | // The qualifiers of the return types must be the same. | ||||||
15196 | if (NewTy.getLocalCVRQualifiers() != OldTy.getLocalCVRQualifiers()) { | ||||||
15197 | Diag(New->getLocation(), | ||||||
15198 | diag::err_covariant_return_type_different_qualifications) | ||||||
15199 | << New->getDeclName() << NewTy << OldTy | ||||||
15200 | << New->getReturnTypeSourceRange(); | ||||||
15201 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||
15202 | << Old->getReturnTypeSourceRange(); | ||||||
15203 | return true; | ||||||
15204 | } | ||||||
15205 | |||||||
15206 | |||||||
15207 | // The new class type must have the same or less qualifiers as the old type. | ||||||
15208 | if (NewClassTy.isMoreQualifiedThan(OldClassTy)) { | ||||||
15209 | Diag(New->getLocation(), | ||||||
15210 | diag::err_covariant_return_type_class_type_more_qualified) | ||||||
15211 | << New->getDeclName() << NewTy << OldTy | ||||||
15212 | << New->getReturnTypeSourceRange(); | ||||||
15213 | Diag(Old->getLocation(), diag::note_overridden_virtual_function) | ||||||
15214 | << Old->getReturnTypeSourceRange(); | ||||||
15215 | return true; | ||||||
15216 | } | ||||||
15217 | |||||||
15218 | return false; | ||||||
15219 | } | ||||||
15220 | |||||||
15221 | /// Mark the given method pure. | ||||||
15222 | /// | ||||||
15223 | /// \param Method the method to be marked pure. | ||||||
15224 | /// | ||||||
15225 | /// \param InitRange the source range that covers the "0" initializer. | ||||||
15226 | bool Sema::CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange) { | ||||||
15227 | SourceLocation EndLoc = InitRange.getEnd(); | ||||||
15228 | if (EndLoc.isValid()) | ||||||
15229 | Method->setRangeEnd(EndLoc); | ||||||
15230 | |||||||
15231 | if (Method->isVirtual() || Method->getParent()->isDependentContext()) { | ||||||
15232 | Method->setPure(); | ||||||
15233 | return false; | ||||||
15234 | } | ||||||
15235 | |||||||
15236 | if (!Method->isInvalidDecl()) | ||||||
15237 | Diag(Method->getLocation(), diag::err_non_virtual_pure) | ||||||
15238 | << Method->getDeclName() << InitRange; | ||||||
15239 | return true; | ||||||
15240 | } | ||||||
15241 | |||||||
15242 | void Sema::ActOnPureSpecifier(Decl *D, SourceLocation ZeroLoc) { | ||||||
15243 | if (D->getFriendObjectKind()) | ||||||
15244 | Diag(D->getLocation(), diag::err_pure_friend); | ||||||
15245 | else if (auto *M = dyn_cast<CXXMethodDecl>(D)) | ||||||
15246 | CheckPureMethod(M, ZeroLoc); | ||||||
15247 | else | ||||||
15248 | Diag(D->getLocation(), diag::err_illegal_initializer); | ||||||
15249 | } | ||||||
15250 | |||||||
15251 | /// Determine whether the given declaration is a global variable or | ||||||
15252 | /// static data member. | ||||||
15253 | static bool isNonlocalVariable(const Decl *D) { | ||||||
15254 | if (const VarDecl *Var = dyn_cast_or_null<VarDecl>(D)) | ||||||
15255 | return Var->hasGlobalStorage(); | ||||||
15256 | |||||||
15257 | return false; | ||||||
15258 | } | ||||||
15259 | |||||||
15260 | /// Invoked when we are about to parse an initializer for the declaration | ||||||
15261 | /// 'Dcl'. | ||||||
15262 | /// | ||||||
15263 | /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a | ||||||
15264 | /// static data member of class X, names should be looked up in the scope of | ||||||
15265 | /// class X. If the declaration had a scope specifier, a scope will have | ||||||
15266 | /// been created and passed in for this purpose. Otherwise, S will be null. | ||||||
15267 | void Sema::ActOnCXXEnterDeclInitializer(Scope *S, Decl *D) { | ||||||
15268 | // If there is no declaration, there was an error parsing it. | ||||||
15269 | if (!D || D->isInvalidDecl()) | ||||||
15270 | return; | ||||||
15271 | |||||||
15272 | // We will always have a nested name specifier here, but this declaration | ||||||
15273 | // might not be out of line if the specifier names the current namespace: | ||||||
15274 | // extern int n; | ||||||
15275 | // int ::n = 0; | ||||||
15276 | if (S && D->isOutOfLine()) | ||||||
15277 | EnterDeclaratorContext(S, D->getDeclContext()); | ||||||
15278 | |||||||
15279 | // If we are parsing the initializer for a static data member, push a | ||||||
15280 | // new expression evaluation context that is associated with this static | ||||||
15281 | // data member. | ||||||
15282 | if (isNonlocalVariable(D)) | ||||||
15283 | PushExpressionEvaluationContext( | ||||||
15284 | ExpressionEvaluationContext::PotentiallyEvaluated, D); | ||||||
15285 | } | ||||||
15286 | |||||||
15287 | /// Invoked after we are finished parsing an initializer for the declaration D. | ||||||
15288 | void Sema::ActOnCXXExitDeclInitializer(Scope *S, Decl *D) { | ||||||
15289 | // If there is no declaration, there was an error parsing it. | ||||||
15290 | if (!D || D->isInvalidDecl()) | ||||||
15291 | return; | ||||||
15292 | |||||||
15293 | if (isNonlocalVariable(D)) | ||||||
15294 | PopExpressionEvaluationContext(); | ||||||
15295 | |||||||
15296 | if (S && D->isOutOfLine()) | ||||||
15297 | ExitDeclaratorContext(S); | ||||||
15298 | } | ||||||
15299 | |||||||
15300 | /// ActOnCXXConditionDeclarationExpr - Parsed a condition declaration of a | ||||||
15301 | /// C++ if/switch/while/for statement. | ||||||
15302 | /// e.g: "if (int x = f()) {...}" | ||||||
15303 | DeclResult Sema::ActOnCXXConditionDeclaration(Scope *S, Declarator &D) { | ||||||
15304 | // C++ 6.4p2: | ||||||
15305 | // The declarator shall not specify a function or an array. | ||||||
15306 | // The type-specifier-seq shall not contain typedef and shall not declare a | ||||||
15307 | // new class or enumeration. | ||||||
15308 | assert(D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef &&((D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class of condition decl." ) ? static_cast<void> (0) : __assert_fail ("D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class of condition decl.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15309, __PRETTY_FUNCTION__)) | ||||||
15309 | "Parser allowed 'typedef' as storage class of condition decl.")((D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class of condition decl." ) ? static_cast<void> (0) : __assert_fail ("D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class of condition decl.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15309, __PRETTY_FUNCTION__)); | ||||||
15310 | |||||||
15311 | Decl *Dcl = ActOnDeclarator(S, D); | ||||||
15312 | if (!Dcl) | ||||||
15313 | return true; | ||||||
15314 | |||||||
15315 | if (isa<FunctionDecl>(Dcl)) { // The declarator shall not specify a function. | ||||||
15316 | Diag(Dcl->getLocation(), diag::err_invalid_use_of_function_type) | ||||||
15317 | << D.getSourceRange(); | ||||||
15318 | return true; | ||||||
15319 | } | ||||||
15320 | |||||||
15321 | return Dcl; | ||||||
15322 | } | ||||||
15323 | |||||||
15324 | void Sema::LoadExternalVTableUses() { | ||||||
15325 | if (!ExternalSource) | ||||||
15326 | return; | ||||||
15327 | |||||||
15328 | SmallVector<ExternalVTableUse, 4> VTables; | ||||||
15329 | ExternalSource->ReadUsedVTables(VTables); | ||||||
15330 | SmallVector<VTableUse, 4> NewUses; | ||||||
15331 | for (unsigned I = 0, N = VTables.size(); I != N; ++I) { | ||||||
15332 | llvm::DenseMap<CXXRecordDecl *, bool>::iterator Pos | ||||||
15333 | = VTablesUsed.find(VTables[I].Record); | ||||||
15334 | // Even if a definition wasn't required before, it may be required now. | ||||||
15335 | if (Pos != VTablesUsed.end()) { | ||||||
15336 | if (!Pos->second && VTables[I].DefinitionRequired) | ||||||
15337 | Pos->second = true; | ||||||
15338 | continue; | ||||||
15339 | } | ||||||
15340 | |||||||
15341 | VTablesUsed[VTables[I].Record] = VTables[I].DefinitionRequired; | ||||||
15342 | NewUses.push_back(VTableUse(VTables[I].Record, VTables[I].Location)); | ||||||
15343 | } | ||||||
15344 | |||||||
15345 | VTableUses.insert(VTableUses.begin(), NewUses.begin(), NewUses.end()); | ||||||
15346 | } | ||||||
15347 | |||||||
15348 | void Sema::MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, | ||||||
15349 | bool DefinitionRequired) { | ||||||
15350 | // Ignore any vtable uses in unevaluated operands or for classes that do | ||||||
15351 | // not have a vtable. | ||||||
15352 | if (!Class->isDynamicClass() || Class->isDependentContext() || | ||||||
15353 | CurContext->isDependentContext() || isUnevaluatedContext()) | ||||||
15354 | return; | ||||||
15355 | // Do not mark as used if compiling for the device outside of the target | ||||||
15356 | // region. | ||||||
15357 | if (LangOpts.OpenMP && LangOpts.OpenMPIsDevice && | ||||||
15358 | !isInOpenMPDeclareTargetContext() && | ||||||
15359 | !isInOpenMPTargetExecutionDirective()) { | ||||||
15360 | if (!DefinitionRequired) | ||||||
15361 | MarkVirtualMembersReferenced(Loc, Class); | ||||||
15362 | return; | ||||||
15363 | } | ||||||
15364 | |||||||
15365 | // Try to insert this class into the map. | ||||||
15366 | LoadExternalVTableUses(); | ||||||
15367 | Class = Class->getCanonicalDecl(); | ||||||
15368 | std::pair<llvm::DenseMap<CXXRecordDecl *, bool>::iterator, bool> | ||||||
15369 | Pos = VTablesUsed.insert(std::make_pair(Class, DefinitionRequired)); | ||||||
15370 | if (!Pos.second) { | ||||||
15371 | // If we already had an entry, check to see if we are promoting this vtable | ||||||
15372 | // to require a definition. If so, we need to reappend to the VTableUses | ||||||
15373 | // list, since we may have already processed the first entry. | ||||||
15374 | if (DefinitionRequired && !Pos.first->second) { | ||||||
15375 | Pos.first->second = true; | ||||||
15376 | } else { | ||||||
15377 | // Otherwise, we can early exit. | ||||||
15378 | return; | ||||||
15379 | } | ||||||
15380 | } else { | ||||||
15381 | // The Microsoft ABI requires that we perform the destructor body | ||||||
15382 | // checks (i.e. operator delete() lookup) when the vtable is marked used, as | ||||||
15383 | // the deleting destructor is emitted with the vtable, not with the | ||||||
15384 | // destructor definition as in the Itanium ABI. | ||||||
15385 | if (Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
15386 | CXXDestructorDecl *DD = Class->getDestructor(); | ||||||
15387 | if (DD && DD->isVirtual() && !DD->isDeleted()) { | ||||||
15388 | if (Class->hasUserDeclaredDestructor() && !DD->isDefined()) { | ||||||
15389 | // If this is an out-of-line declaration, marking it referenced will | ||||||
15390 | // not do anything. Manually call CheckDestructor to look up operator | ||||||
15391 | // delete(). | ||||||
15392 | ContextRAII SavedContext(*this, DD); | ||||||
15393 | CheckDestructor(DD); | ||||||
15394 | } else { | ||||||
15395 | MarkFunctionReferenced(Loc, Class->getDestructor()); | ||||||
15396 | } | ||||||
15397 | } | ||||||
15398 | } | ||||||
15399 | } | ||||||
15400 | |||||||
15401 | // Local classes need to have their virtual members marked | ||||||
15402 | // immediately. For all other classes, we mark their virtual members | ||||||
15403 | // at the end of the translation unit. | ||||||
15404 | if (Class->isLocalClass()) | ||||||
15405 | MarkVirtualMembersReferenced(Loc, Class); | ||||||
15406 | else | ||||||
15407 | VTableUses.push_back(std::make_pair(Class, Loc)); | ||||||
15408 | } | ||||||
15409 | |||||||
15410 | bool Sema::DefineUsedVTables() { | ||||||
15411 | LoadExternalVTableUses(); | ||||||
15412 | if (VTableUses.empty()) | ||||||
15413 | return false; | ||||||
15414 | |||||||
15415 | // Note: The VTableUses vector could grow as a result of marking | ||||||
15416 | // the members of a class as "used", so we check the size each | ||||||
15417 | // time through the loop and prefer indices (which are stable) to | ||||||
15418 | // iterators (which are not). | ||||||
15419 | bool DefinedAnything = false; | ||||||
15420 | for (unsigned I = 0; I != VTableUses.size(); ++I) { | ||||||
15421 | CXXRecordDecl *Class = VTableUses[I].first->getDefinition(); | ||||||
15422 | if (!Class) | ||||||
15423 | continue; | ||||||
15424 | TemplateSpecializationKind ClassTSK = | ||||||
15425 | Class->getTemplateSpecializationKind(); | ||||||
15426 | |||||||
15427 | SourceLocation Loc = VTableUses[I].second; | ||||||
15428 | |||||||
15429 | bool DefineVTable = true; | ||||||
15430 | |||||||
15431 | // If this class has a key function, but that key function is | ||||||
15432 | // defined in another translation unit, we don't need to emit the | ||||||
15433 | // vtable even though we're using it. | ||||||
15434 | const CXXMethodDecl *KeyFunction = Context.getCurrentKeyFunction(Class); | ||||||
15435 | if (KeyFunction && !KeyFunction->hasBody()) { | ||||||
15436 | // The key function is in another translation unit. | ||||||
15437 | DefineVTable = false; | ||||||
15438 | TemplateSpecializationKind TSK = | ||||||
15439 | KeyFunction->getTemplateSpecializationKind(); | ||||||
15440 | assert(TSK != TSK_ExplicitInstantiationDefinition &&((TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && "Instantiations don't have key functions" ) ? static_cast<void> (0) : __assert_fail ("TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && \"Instantiations don't have key functions\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15442, __PRETTY_FUNCTION__)) | ||||||
15441 | TSK != TSK_ImplicitInstantiation &&((TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && "Instantiations don't have key functions" ) ? static_cast<void> (0) : __assert_fail ("TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && \"Instantiations don't have key functions\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15442, __PRETTY_FUNCTION__)) | ||||||
15442 | "Instantiations don't have key functions")((TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && "Instantiations don't have key functions" ) ? static_cast<void> (0) : __assert_fail ("TSK != TSK_ExplicitInstantiationDefinition && TSK != TSK_ImplicitInstantiation && \"Instantiations don't have key functions\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15442, __PRETTY_FUNCTION__)); | ||||||
15443 | (void)TSK; | ||||||
15444 | } else if (!KeyFunction) { | ||||||
15445 | // If we have a class with no key function that is the subject | ||||||
15446 | // of an explicit instantiation declaration, suppress the | ||||||
15447 | // vtable; it will live with the explicit instantiation | ||||||
15448 | // definition. | ||||||
15449 | bool IsExplicitInstantiationDeclaration = | ||||||
15450 | ClassTSK == TSK_ExplicitInstantiationDeclaration; | ||||||
15451 | for (auto R : Class->redecls()) { | ||||||
15452 | TemplateSpecializationKind TSK | ||||||
15453 | = cast<CXXRecordDecl>(R)->getTemplateSpecializationKind(); | ||||||
15454 | if (TSK == TSK_ExplicitInstantiationDeclaration) | ||||||
15455 | IsExplicitInstantiationDeclaration = true; | ||||||
15456 | else if (TSK == TSK_ExplicitInstantiationDefinition) { | ||||||
15457 | IsExplicitInstantiationDeclaration = false; | ||||||
15458 | break; | ||||||
15459 | } | ||||||
15460 | } | ||||||
15461 | |||||||
15462 | if (IsExplicitInstantiationDeclaration) | ||||||
15463 | DefineVTable = false; | ||||||
15464 | } | ||||||
15465 | |||||||
15466 | // The exception specifications for all virtual members may be needed even | ||||||
15467 | // if we are not providing an authoritative form of the vtable in this TU. | ||||||
15468 | // We may choose to emit it available_externally anyway. | ||||||
15469 | if (!DefineVTable) { | ||||||
15470 | MarkVirtualMemberExceptionSpecsNeeded(Loc, Class); | ||||||
15471 | continue; | ||||||
15472 | } | ||||||
15473 | |||||||
15474 | // Mark all of the virtual members of this class as referenced, so | ||||||
15475 | // that we can build a vtable. Then, tell the AST consumer that a | ||||||
15476 | // vtable for this class is required. | ||||||
15477 | DefinedAnything = true; | ||||||
15478 | MarkVirtualMembersReferenced(Loc, Class); | ||||||
15479 | CXXRecordDecl *Canonical = Class->getCanonicalDecl(); | ||||||
15480 | if (VTablesUsed[Canonical]) | ||||||
15481 | Consumer.HandleVTable(Class); | ||||||
15482 | |||||||
15483 | // Warn if we're emitting a weak vtable. The vtable will be weak if there is | ||||||
15484 | // no key function or the key function is inlined. Don't warn in C++ ABIs | ||||||
15485 | // that lack key functions, since the user won't be able to make one. | ||||||
15486 | if (Context.getTargetInfo().getCXXABI().hasKeyFunctions() && | ||||||
15487 | Class->isExternallyVisible() && ClassTSK != TSK_ImplicitInstantiation) { | ||||||
15488 | const FunctionDecl *KeyFunctionDef = nullptr; | ||||||
15489 | if (!KeyFunction || (KeyFunction->hasBody(KeyFunctionDef) && | ||||||
15490 | KeyFunctionDef->isInlined())) { | ||||||
15491 | Diag(Class->getLocation(), | ||||||
15492 | ClassTSK == TSK_ExplicitInstantiationDefinition | ||||||
15493 | ? diag::warn_weak_template_vtable | ||||||
15494 | : diag::warn_weak_vtable) | ||||||
15495 | << Class; | ||||||
15496 | } | ||||||
15497 | } | ||||||
15498 | } | ||||||
15499 | VTableUses.clear(); | ||||||
15500 | |||||||
15501 | return DefinedAnything; | ||||||
15502 | } | ||||||
15503 | |||||||
15504 | void Sema::MarkVirtualMemberExceptionSpecsNeeded(SourceLocation Loc, | ||||||
15505 | const CXXRecordDecl *RD) { | ||||||
15506 | for (const auto *I : RD->methods()) | ||||||
15507 | if (I->isVirtual() && !I->isPure()) | ||||||
15508 | ResolveExceptionSpec(Loc, I->getType()->castAs<FunctionProtoType>()); | ||||||
15509 | } | ||||||
15510 | |||||||
15511 | void Sema::MarkVirtualMembersReferenced(SourceLocation Loc, | ||||||
15512 | const CXXRecordDecl *RD, | ||||||
15513 | bool ConstexprOnly) { | ||||||
15514 | // Mark all functions which will appear in RD's vtable as used. | ||||||
15515 | CXXFinalOverriderMap FinalOverriders; | ||||||
15516 | RD->getFinalOverriders(FinalOverriders); | ||||||
15517 | for (CXXFinalOverriderMap::const_iterator I = FinalOverriders.begin(), | ||||||
15518 | E = FinalOverriders.end(); | ||||||
15519 | I != E; ++I) { | ||||||
15520 | for (OverridingMethods::const_iterator OI = I->second.begin(), | ||||||
15521 | OE = I->second.end(); | ||||||
15522 | OI != OE; ++OI) { | ||||||
15523 | assert(OI->second.size() > 0 && "no final overrider")((OI->second.size() > 0 && "no final overrider" ) ? static_cast<void> (0) : __assert_fail ("OI->second.size() > 0 && \"no final overrider\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15523, __PRETTY_FUNCTION__)); | ||||||
15524 | CXXMethodDecl *Overrider = OI->second.front().Method; | ||||||
15525 | |||||||
15526 | // C++ [basic.def.odr]p2: | ||||||
15527 | // [...] A virtual member function is used if it is not pure. [...] | ||||||
15528 | if (!Overrider->isPure() && (!ConstexprOnly || Overrider->isConstexpr())) | ||||||
15529 | MarkFunctionReferenced(Loc, Overrider); | ||||||
15530 | } | ||||||
15531 | } | ||||||
15532 | |||||||
15533 | // Only classes that have virtual bases need a VTT. | ||||||
15534 | if (RD->getNumVBases() == 0) | ||||||
15535 | return; | ||||||
15536 | |||||||
15537 | for (const auto &I : RD->bases()) { | ||||||
15538 | const CXXRecordDecl *Base = | ||||||
15539 | cast<CXXRecordDecl>(I.getType()->getAs<RecordType>()->getDecl()); | ||||||
15540 | if (Base->getNumVBases() == 0) | ||||||
15541 | continue; | ||||||
15542 | MarkVirtualMembersReferenced(Loc, Base); | ||||||
15543 | } | ||||||
15544 | } | ||||||
15545 | |||||||
15546 | /// SetIvarInitializers - This routine builds initialization ASTs for the | ||||||
15547 | /// Objective-C implementation whose ivars need be initialized. | ||||||
15548 | void Sema::SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation) { | ||||||
15549 | if (!getLangOpts().CPlusPlus) | ||||||
15550 | return; | ||||||
15551 | if (ObjCInterfaceDecl *OID = ObjCImplementation->getClassInterface()) { | ||||||
15552 | SmallVector<ObjCIvarDecl*, 8> ivars; | ||||||
15553 | CollectIvarsToConstructOrDestruct(OID, ivars); | ||||||
15554 | if (ivars.empty()) | ||||||
15555 | return; | ||||||
15556 | SmallVector<CXXCtorInitializer*, 32> AllToInit; | ||||||
15557 | for (unsigned i = 0; i < ivars.size(); i++) { | ||||||
15558 | FieldDecl *Field = ivars[i]; | ||||||
15559 | if (Field->isInvalidDecl()) | ||||||
15560 | continue; | ||||||
15561 | |||||||
15562 | CXXCtorInitializer *Member; | ||||||
15563 | InitializedEntity InitEntity = InitializedEntity::InitializeMember(Field); | ||||||
15564 | InitializationKind InitKind = | ||||||
15565 | InitializationKind::CreateDefault(ObjCImplementation->getLocation()); | ||||||
15566 | |||||||
15567 | InitializationSequence InitSeq(*this, InitEntity, InitKind, None); | ||||||
15568 | ExprResult MemberInit = | ||||||
15569 | InitSeq.Perform(*this, InitEntity, InitKind, None); | ||||||
15570 | MemberInit = MaybeCreateExprWithCleanups(MemberInit); | ||||||
15571 | // Note, MemberInit could actually come back empty if no initialization | ||||||
15572 | // is required (e.g., because it would call a trivial default constructor) | ||||||
15573 | if (!MemberInit.get() || MemberInit.isInvalid()) | ||||||
15574 | continue; | ||||||
15575 | |||||||
15576 | Member = | ||||||
15577 | new (Context) CXXCtorInitializer(Context, Field, SourceLocation(), | ||||||
15578 | SourceLocation(), | ||||||
15579 | MemberInit.getAs<Expr>(), | ||||||
15580 | SourceLocation()); | ||||||
15581 | AllToInit.push_back(Member); | ||||||
15582 | |||||||
15583 | // Be sure that the destructor is accessible and is marked as referenced. | ||||||
15584 | if (const RecordType *RecordTy = | ||||||
15585 | Context.getBaseElementType(Field->getType()) | ||||||
15586 | ->getAs<RecordType>()) { | ||||||
15587 | CXXRecordDecl *RD = cast<CXXRecordDecl>(RecordTy->getDecl()); | ||||||
15588 | if (CXXDestructorDecl *Destructor = LookupDestructor(RD)) { | ||||||
15589 | MarkFunctionReferenced(Field->getLocation(), Destructor); | ||||||
15590 | CheckDestructorAccess(Field->getLocation(), Destructor, | ||||||
15591 | PDiag(diag::err_access_dtor_ivar) | ||||||
15592 | << Context.getBaseElementType(Field->getType())); | ||||||
15593 | } | ||||||
15594 | } | ||||||
15595 | } | ||||||
15596 | ObjCImplementation->setIvarInitializers(Context, | ||||||
15597 | AllToInit.data(), AllToInit.size()); | ||||||
15598 | } | ||||||
15599 | } | ||||||
15600 | |||||||
15601 | static | ||||||
15602 | void DelegatingCycleHelper(CXXConstructorDecl* Ctor, | ||||||
15603 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Valid, | ||||||
15604 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Invalid, | ||||||
15605 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> &Current, | ||||||
15606 | Sema &S) { | ||||||
15607 | if (Ctor->isInvalidDecl()) | ||||||
15608 | return; | ||||||
15609 | |||||||
15610 | CXXConstructorDecl *Target = Ctor->getTargetConstructor(); | ||||||
15611 | |||||||
15612 | // Target may not be determinable yet, for instance if this is a dependent | ||||||
15613 | // call in an uninstantiated template. | ||||||
15614 | if (Target) { | ||||||
15615 | const FunctionDecl *FNTarget = nullptr; | ||||||
15616 | (void)Target->hasBody(FNTarget); | ||||||
15617 | Target = const_cast<CXXConstructorDecl*>( | ||||||
15618 | cast_or_null<CXXConstructorDecl>(FNTarget)); | ||||||
15619 | } | ||||||
15620 | |||||||
15621 | CXXConstructorDecl *Canonical = Ctor->getCanonicalDecl(), | ||||||
15622 | // Avoid dereferencing a null pointer here. | ||||||
15623 | *TCanonical = Target? Target->getCanonicalDecl() : nullptr; | ||||||
15624 | |||||||
15625 | if (!Current.insert(Canonical).second) | ||||||
15626 | return; | ||||||
15627 | |||||||
15628 | // We know that beyond here, we aren't chaining into a cycle. | ||||||
15629 | if (!Target || !Target->isDelegatingConstructor() || | ||||||
15630 | Target->isInvalidDecl() || Valid.count(TCanonical)) { | ||||||
15631 | Valid.insert(Current.begin(), Current.end()); | ||||||
15632 | Current.clear(); | ||||||
15633 | // We've hit a cycle. | ||||||
15634 | } else if (TCanonical == Canonical || Invalid.count(TCanonical) || | ||||||
15635 | Current.count(TCanonical)) { | ||||||
15636 | // If we haven't diagnosed this cycle yet, do so now. | ||||||
15637 | if (!Invalid.count(TCanonical)) { | ||||||
15638 | S.Diag((*Ctor->init_begin())->getSourceLocation(), | ||||||
15639 | diag::warn_delegating_ctor_cycle) | ||||||
15640 | << Ctor; | ||||||
15641 | |||||||
15642 | // Don't add a note for a function delegating directly to itself. | ||||||
15643 | if (TCanonical != Canonical) | ||||||
15644 | S.Diag(Target->getLocation(), diag::note_it_delegates_to); | ||||||
15645 | |||||||
15646 | CXXConstructorDecl *C = Target; | ||||||
15647 | while (C->getCanonicalDecl() != Canonical) { | ||||||
15648 | const FunctionDecl *FNTarget = nullptr; | ||||||
15649 | (void)C->getTargetConstructor()->hasBody(FNTarget); | ||||||
15650 | assert(FNTarget && "Ctor cycle through bodiless function")((FNTarget && "Ctor cycle through bodiless function") ? static_cast<void> (0) : __assert_fail ("FNTarget && \"Ctor cycle through bodiless function\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15650, __PRETTY_FUNCTION__)); | ||||||
15651 | |||||||
15652 | C = const_cast<CXXConstructorDecl*>( | ||||||
15653 | cast<CXXConstructorDecl>(FNTarget)); | ||||||
15654 | S.Diag(C->getLocation(), diag::note_which_delegates_to); | ||||||
15655 | } | ||||||
15656 | } | ||||||
15657 | |||||||
15658 | Invalid.insert(Current.begin(), Current.end()); | ||||||
15659 | Current.clear(); | ||||||
15660 | } else { | ||||||
15661 | DelegatingCycleHelper(Target, Valid, Invalid, Current, S); | ||||||
15662 | } | ||||||
15663 | } | ||||||
15664 | |||||||
15665 | |||||||
15666 | void Sema::CheckDelegatingCtorCycles() { | ||||||
15667 | llvm::SmallPtrSet<CXXConstructorDecl*, 4> Valid, Invalid, Current; | ||||||
15668 | |||||||
15669 | for (DelegatingCtorDeclsType::iterator | ||||||
15670 | I = DelegatingCtorDecls.begin(ExternalSource), | ||||||
15671 | E = DelegatingCtorDecls.end(); | ||||||
15672 | I != E; ++I) | ||||||
15673 | DelegatingCycleHelper(*I, Valid, Invalid, Current, *this); | ||||||
15674 | |||||||
15675 | for (auto CI = Invalid.begin(), CE = Invalid.end(); CI != CE; ++CI) | ||||||
15676 | (*CI)->setInvalidDecl(); | ||||||
15677 | } | ||||||
15678 | |||||||
15679 | namespace { | ||||||
15680 | /// AST visitor that finds references to the 'this' expression. | ||||||
15681 | class FindCXXThisExpr : public RecursiveASTVisitor<FindCXXThisExpr> { | ||||||
15682 | Sema &S; | ||||||
15683 | |||||||
15684 | public: | ||||||
15685 | explicit FindCXXThisExpr(Sema &S) : S(S) { } | ||||||
15686 | |||||||
15687 | bool VisitCXXThisExpr(CXXThisExpr *E) { | ||||||
15688 | S.Diag(E->getLocation(), diag::err_this_static_member_func) | ||||||
15689 | << E->isImplicit(); | ||||||
15690 | return false; | ||||||
15691 | } | ||||||
15692 | }; | ||||||
15693 | } | ||||||
15694 | |||||||
15695 | bool Sema::checkThisInStaticMemberFunctionType(CXXMethodDecl *Method) { | ||||||
15696 | TypeSourceInfo *TSInfo = Method->getTypeSourceInfo(); | ||||||
15697 | if (!TSInfo) | ||||||
15698 | return false; | ||||||
15699 | |||||||
15700 | TypeLoc TL = TSInfo->getTypeLoc(); | ||||||
15701 | FunctionProtoTypeLoc ProtoTL = TL.getAs<FunctionProtoTypeLoc>(); | ||||||
15702 | if (!ProtoTL) | ||||||
15703 | return false; | ||||||
15704 | |||||||
15705 | // C++11 [expr.prim.general]p3: | ||||||
15706 | // [The expression this] shall not appear before the optional | ||||||
15707 | // cv-qualifier-seq and it shall not appear within the declaration of a | ||||||
15708 | // static member function (although its type and value category are defined | ||||||
15709 | // within a static member function as they are within a non-static member | ||||||
15710 | // function). [ Note: this is because declaration matching does not occur | ||||||
15711 | // until the complete declarator is known. - end note ] | ||||||
15712 | const FunctionProtoType *Proto = ProtoTL.getTypePtr(); | ||||||
15713 | FindCXXThisExpr Finder(*this); | ||||||
15714 | |||||||
15715 | // If the return type came after the cv-qualifier-seq, check it now. | ||||||
15716 | if (Proto->hasTrailingReturn() && | ||||||
15717 | !Finder.TraverseTypeLoc(ProtoTL.getReturnLoc())) | ||||||
15718 | return true; | ||||||
15719 | |||||||
15720 | // Check the exception specification. | ||||||
15721 | if (checkThisInStaticMemberFunctionExceptionSpec(Method)) | ||||||
15722 | return true; | ||||||
15723 | |||||||
15724 | return checkThisInStaticMemberFunctionAttributes(Method); | ||||||
15725 | } | ||||||
15726 | |||||||
15727 | bool Sema::checkThisInStaticMemberFunctionExceptionSpec(CXXMethodDecl *Method) { | ||||||
15728 | TypeSourceInfo *TSInfo = Method->getTypeSourceInfo(); | ||||||
15729 | if (!TSInfo) | ||||||
15730 | return false; | ||||||
15731 | |||||||
15732 | TypeLoc TL = TSInfo->getTypeLoc(); | ||||||
15733 | FunctionProtoTypeLoc ProtoTL = TL.getAs<FunctionProtoTypeLoc>(); | ||||||
15734 | if (!ProtoTL) | ||||||
15735 | return false; | ||||||
15736 | |||||||
15737 | const FunctionProtoType *Proto = ProtoTL.getTypePtr(); | ||||||
15738 | FindCXXThisExpr Finder(*this); | ||||||
15739 | |||||||
15740 | switch (Proto->getExceptionSpecType()) { | ||||||
15741 | case EST_Unparsed: | ||||||
15742 | case EST_Uninstantiated: | ||||||
15743 | case EST_Unevaluated: | ||||||
15744 | case EST_BasicNoexcept: | ||||||
15745 | case EST_NoThrow: | ||||||
15746 | case EST_DynamicNone: | ||||||
15747 | case EST_MSAny: | ||||||
15748 | case EST_None: | ||||||
15749 | break; | ||||||
15750 | |||||||
15751 | case EST_DependentNoexcept: | ||||||
15752 | case EST_NoexceptFalse: | ||||||
15753 | case EST_NoexceptTrue: | ||||||
15754 | if (!Finder.TraverseStmt(Proto->getNoexceptExpr())) | ||||||
15755 | return true; | ||||||
15756 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
15757 | |||||||
15758 | case EST_Dynamic: | ||||||
15759 | for (const auto &E : Proto->exceptions()) { | ||||||
15760 | if (!Finder.TraverseType(E)) | ||||||
15761 | return true; | ||||||
15762 | } | ||||||
15763 | break; | ||||||
15764 | } | ||||||
15765 | |||||||
15766 | return false; | ||||||
15767 | } | ||||||
15768 | |||||||
15769 | bool Sema::checkThisInStaticMemberFunctionAttributes(CXXMethodDecl *Method) { | ||||||
15770 | FindCXXThisExpr Finder(*this); | ||||||
15771 | |||||||
15772 | // Check attributes. | ||||||
15773 | for (const auto *A : Method->attrs()) { | ||||||
15774 | // FIXME: This should be emitted by tblgen. | ||||||
15775 | Expr *Arg = nullptr; | ||||||
15776 | ArrayRef<Expr *> Args; | ||||||
15777 | if (const auto *G = dyn_cast<GuardedByAttr>(A)) | ||||||
15778 | Arg = G->getArg(); | ||||||
15779 | else if (const auto *G = dyn_cast<PtGuardedByAttr>(A)) | ||||||
15780 | Arg = G->getArg(); | ||||||
15781 | else if (const auto *AA = dyn_cast<AcquiredAfterAttr>(A)) | ||||||
15782 | Args = llvm::makeArrayRef(AA->args_begin(), AA->args_size()); | ||||||
15783 | else if (const auto *AB = dyn_cast<AcquiredBeforeAttr>(A)) | ||||||
15784 | Args = llvm::makeArrayRef(AB->args_begin(), AB->args_size()); | ||||||
15785 | else if (const auto *ETLF = dyn_cast<ExclusiveTrylockFunctionAttr>(A)) { | ||||||
15786 | Arg = ETLF->getSuccessValue(); | ||||||
15787 | Args = llvm::makeArrayRef(ETLF->args_begin(), ETLF->args_size()); | ||||||
15788 | } else if (const auto *STLF = dyn_cast<SharedTrylockFunctionAttr>(A)) { | ||||||
15789 | Arg = STLF->getSuccessValue(); | ||||||
15790 | Args = llvm::makeArrayRef(STLF->args_begin(), STLF->args_size()); | ||||||
15791 | } else if (const auto *LR = dyn_cast<LockReturnedAttr>(A)) | ||||||
15792 | Arg = LR->getArg(); | ||||||
15793 | else if (const auto *LE = dyn_cast<LocksExcludedAttr>(A)) | ||||||
15794 | Args = llvm::makeArrayRef(LE->args_begin(), LE->args_size()); | ||||||
15795 | else if (const auto *RC = dyn_cast<RequiresCapabilityAttr>(A)) | ||||||
15796 | Args = llvm::makeArrayRef(RC->args_begin(), RC->args_size()); | ||||||
15797 | else if (const auto *AC = dyn_cast<AcquireCapabilityAttr>(A)) | ||||||
15798 | Args = llvm::makeArrayRef(AC->args_begin(), AC->args_size()); | ||||||
15799 | else if (const auto *AC = dyn_cast<TryAcquireCapabilityAttr>(A)) | ||||||
15800 | Args = llvm::makeArrayRef(AC->args_begin(), AC->args_size()); | ||||||
15801 | else if (const auto *RC = dyn_cast<ReleaseCapabilityAttr>(A)) | ||||||
15802 | Args = llvm::makeArrayRef(RC->args_begin(), RC->args_size()); | ||||||
15803 | |||||||
15804 | if (Arg && !Finder.TraverseStmt(Arg)) | ||||||
15805 | return true; | ||||||
15806 | |||||||
15807 | for (unsigned I = 0, N = Args.size(); I != N; ++I) { | ||||||
15808 | if (!Finder.TraverseStmt(Args[I])) | ||||||
15809 | return true; | ||||||
15810 | } | ||||||
15811 | } | ||||||
15812 | |||||||
15813 | return false; | ||||||
15814 | } | ||||||
15815 | |||||||
15816 | void Sema::checkExceptionSpecification( | ||||||
15817 | bool IsTopLevel, ExceptionSpecificationType EST, | ||||||
15818 | ArrayRef<ParsedType> DynamicExceptions, | ||||||
15819 | ArrayRef<SourceRange> DynamicExceptionRanges, Expr *NoexceptExpr, | ||||||
15820 | SmallVectorImpl<QualType> &Exceptions, | ||||||
15821 | FunctionProtoType::ExceptionSpecInfo &ESI) { | ||||||
15822 | Exceptions.clear(); | ||||||
15823 | ESI.Type = EST; | ||||||
15824 | if (EST == EST_Dynamic) { | ||||||
15825 | Exceptions.reserve(DynamicExceptions.size()); | ||||||
15826 | for (unsigned ei = 0, ee = DynamicExceptions.size(); ei != ee; ++ei) { | ||||||
15827 | // FIXME: Preserve type source info. | ||||||
15828 | QualType ET = GetTypeFromParser(DynamicExceptions[ei]); | ||||||
15829 | |||||||
15830 | if (IsTopLevel) { | ||||||
15831 | SmallVector<UnexpandedParameterPack, 2> Unexpanded; | ||||||
15832 | collectUnexpandedParameterPacks(ET, Unexpanded); | ||||||
15833 | if (!Unexpanded.empty()) { | ||||||
15834 | DiagnoseUnexpandedParameterPacks( | ||||||
15835 | DynamicExceptionRanges[ei].getBegin(), UPPC_ExceptionType, | ||||||
15836 | Unexpanded); | ||||||
15837 | continue; | ||||||
15838 | } | ||||||
15839 | } | ||||||
15840 | |||||||
15841 | // Check that the type is valid for an exception spec, and | ||||||
15842 | // drop it if not. | ||||||
15843 | if (!CheckSpecifiedExceptionType(ET, DynamicExceptionRanges[ei])) | ||||||
15844 | Exceptions.push_back(ET); | ||||||
15845 | } | ||||||
15846 | ESI.Exceptions = Exceptions; | ||||||
15847 | return; | ||||||
15848 | } | ||||||
15849 | |||||||
15850 | if (isComputedNoexcept(EST)) { | ||||||
15851 | assert((NoexceptExpr->isTypeDependent() ||(((NoexceptExpr->isTypeDependent() || NoexceptExpr->getType ()->getCanonicalTypeUnqualified() == Context.BoolTy) && "Parser should have made sure that the expression is boolean" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15854, __PRETTY_FUNCTION__)) | ||||||
15852 | NoexceptExpr->getType()->getCanonicalTypeUnqualified() ==(((NoexceptExpr->isTypeDependent() || NoexceptExpr->getType ()->getCanonicalTypeUnqualified() == Context.BoolTy) && "Parser should have made sure that the expression is boolean" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15854, __PRETTY_FUNCTION__)) | ||||||
15853 | Context.BoolTy) &&(((NoexceptExpr->isTypeDependent() || NoexceptExpr->getType ()->getCanonicalTypeUnqualified() == Context.BoolTy) && "Parser should have made sure that the expression is boolean" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15854, __PRETTY_FUNCTION__)) | ||||||
15854 | "Parser should have made sure that the expression is boolean")(((NoexceptExpr->isTypeDependent() || NoexceptExpr->getType ()->getCanonicalTypeUnqualified() == Context.BoolTy) && "Parser should have made sure that the expression is boolean" ) ? static_cast<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-10~svn373517/tools/clang/lib/Sema/SemaDeclCXX.cpp" , 15854, __PRETTY_FUNCTION__)); | ||||||
15855 | if (IsTopLevel && DiagnoseUnexpandedParameterPack(NoexceptExpr)) { | ||||||
15856 | ESI.Type = EST_BasicNoexcept; | ||||||
15857 | return; | ||||||
15858 | } | ||||||
15859 | |||||||
15860 | ESI.NoexceptExpr = NoexceptExpr; | ||||||
15861 | return; | ||||||
15862 | } | ||||||
15863 | } | ||||||
15864 | |||||||
15865 | void Sema::actOnDelayedExceptionSpecification(Decl *MethodD, | ||||||
15866 | ExceptionSpecificationType EST, | ||||||
15867 | SourceRange SpecificationRange, | ||||||
15868 | ArrayRef<ParsedType> DynamicExceptions, | ||||||
15869 | ArrayRef<SourceRange> DynamicExceptionRanges, | ||||||
15870 | Expr *NoexceptExpr) { | ||||||
15871 | if (!MethodD) | ||||||
15872 | return; | ||||||
15873 | |||||||
15874 | // Dig out the method we're referring to. | ||||||
15875 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(MethodD)) | ||||||
15876 | MethodD = FunTmpl->getTemplatedDecl(); | ||||||
15877 | |||||||
15878 | CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(MethodD); | ||||||
15879 | if (!Method) | ||||||
15880 | return; | ||||||
15881 | |||||||
15882 | // Check the exception specification. | ||||||
15883 | llvm::SmallVector<QualType, 4> Exceptions; | ||||||
15884 | FunctionProtoType::ExceptionSpecInfo ESI; | ||||||
15885 | checkExceptionSpecification(/*IsTopLevel*/true, EST, DynamicExceptions, | ||||||
15886 | DynamicExceptionRanges, NoexceptExpr, Exceptions, | ||||||
15887 | ESI); | ||||||
15888 | |||||||
15889 | // Update the exception specification on the function type. | ||||||
15890 | Context.adjustExceptionSpec(Method, ESI, /*AsWritten*/true); | ||||||
15891 | |||||||
15892 | if (Method->isStatic()) | ||||||
15893 | checkThisInStaticMemberFunctionExceptionSpec(Method); | ||||||
15894 | |||||||
15895 | if (Method->isVirtual()) { | ||||||
15896 | // Check overrides, which we previously had to delay. | ||||||
15897 | for (const CXXMethodDecl *O : Method->overridden_methods()) | ||||||
15898 | CheckOverridingFunctionExceptionSpec(Method, O); | ||||||
15899 | } | ||||||
15900 | } | ||||||
15901 | |||||||
15902 | /// HandleMSProperty - Analyze a __delcspec(property) field of a C++ class. | ||||||
15903 | /// | ||||||
15904 | MSPropertyDecl *Sema::HandleMSProperty(Scope *S, RecordDecl *Record, | ||||||
15905 | SourceLocation DeclStart, Declarator &D, | ||||||
15906 | Expr *BitWidth, | ||||||
15907 | InClassInitStyle InitStyle, | ||||||
15908 | AccessSpecifier AS, | ||||||
15909 | const ParsedAttr &MSPropertyAttr) { | ||||||
15910 | IdentifierInfo *II = D.getIdentifier(); | ||||||
15911 | if (!II) { | ||||||
15912 | Diag(DeclStart, diag::err_anonymous_property); | ||||||
15913 | return nullptr; | ||||||
15914 | } | ||||||
15915 | SourceLocation Loc = D.getIdentifierLoc(); | ||||||
15916 | |||||||
15917 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
15918 | QualType T = TInfo->getType(); | ||||||
15919 | if (getLangOpts().CPlusPlus) { | ||||||
15920 | CheckExtraCXXDefaultArguments(D); | ||||||
15921 | |||||||
15922 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
15923 | UPPC_DataMemberType)) { | ||||||
15924 | D.setInvalidType(); | ||||||
15925 | T = Context.IntTy; | ||||||
15926 | TInfo = Context.getTrivialTypeSourceInfo(T, Loc); | ||||||
15927 | } | ||||||
15928 | } | ||||||
15929 | |||||||
15930 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
15931 | |||||||
15932 | if (D.getDeclSpec().isInlineSpecified()) | ||||||
15933 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
15934 | << getLangOpts().CPlusPlus17; | ||||||
15935 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||||
15936 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
15937 | diag::err_invalid_thread) | ||||||
15938 | << DeclSpec::getSpecifierName(TSCS); | ||||||
15939 | |||||||
15940 | // Check to see if this name was declared as a member previously | ||||||
15941 | NamedDecl *PrevDecl = nullptr; | ||||||
15942 | LookupResult Previous(*this, II, Loc, LookupMemberName, | ||||||
15943 | ForVisibleRedeclaration); | ||||||
15944 | LookupName(Previous, S); | ||||||
15945 | switch (Previous.getResultKind()) { | ||||||
15946 | case LookupResult::Found: | ||||||
15947 | case LookupResult::FoundUnresolvedValue: | ||||||
15948 | PrevDecl = Previous.getAsSingle<NamedDecl>(); | ||||||
15949 | break; | ||||||
15950 | |||||||
15951 | case LookupResult::FoundOverloaded: | ||||||
15952 | PrevDecl = Previous.getRepresentativeDecl(); | ||||||
15953 | break; | ||||||
15954 | |||||||
15955 | case LookupResult::NotFound: | ||||||
15956 | case LookupResult::NotFoundInCurrentInstantiation: | ||||||
15957 | case LookupResult::Ambiguous: | ||||||
15958 | break; | ||||||
15959 | } | ||||||
15960 | |||||||
15961 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | ||||||
15962 | // Maybe we will complain about the shadowed template parameter. | ||||||
15963 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||
15964 | // Just pretend that we didn't see the previous declaration. | ||||||
15965 | PrevDecl = nullptr; | ||||||
15966 | } | ||||||
15967 | |||||||
15968 | if (PrevDecl && !isDeclInScope(PrevDecl, Record, S)) | ||||||
15969 | PrevDecl = nullptr; | ||||||
15970 | |||||||
15971 | SourceLocation TSSL = D.getBeginLoc(); | ||||||
15972 | MSPropertyDecl *NewPD = | ||||||
15973 | MSPropertyDecl::Create(Context, Record, Loc, II, T, TInfo, TSSL, | ||||||
15974 | MSPropertyAttr.getPropertyDataGetter(), | ||||||
15975 | MSPropertyAttr.getPropertyDataSetter()); | ||||||
15976 | ProcessDeclAttributes(TUScope, NewPD, D); | ||||||
15977 | NewPD->setAccess(AS); | ||||||
15978 | |||||||
15979 | if (NewPD->isInvalidDecl()) | ||||||
15980 | Record->setInvalidDecl(); | ||||||
15981 | |||||||
15982 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
15983 | NewPD->setModulePrivate(); | ||||||
15984 | |||||||
15985 | if (NewPD->isInvalidDecl() && PrevDecl) { | ||||||
15986 | // Don't introduce NewFD into scope; there's already something | ||||||
15987 | // with the same name in the same scope. | ||||||
15988 | } else if (II) { | ||||||
15989 | PushOnScopeChains(NewPD, S); | ||||||
15990 | } else | ||||||
15991 | Record->addDecl(NewPD); | ||||||
15992 | |||||||
15993 | return NewPD; | ||||||
15994 | } |
1 | //===- Decl.h - Classes for representing 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 | // This file defines the Decl subclasses. |
10 | // |
11 | //===----------------------------------------------------------------------===// |
12 | |
13 | #ifndef LLVM_CLANG_AST_DECL_H |
14 | #define LLVM_CLANG_AST_DECL_H |
15 | |
16 | #include "clang/AST/APValue.h" |
17 | #include "clang/AST/ASTContextAllocate.h" |
18 | #include "clang/AST/DeclBase.h" |
19 | #include "clang/AST/DeclarationName.h" |
20 | #include "clang/AST/ExternalASTSource.h" |
21 | #include "clang/AST/NestedNameSpecifier.h" |
22 | #include "clang/AST/Redeclarable.h" |
23 | #include "clang/AST/Type.h" |
24 | #include "clang/Basic/AddressSpaces.h" |
25 | #include "clang/Basic/Diagnostic.h" |
26 | #include "clang/Basic/IdentifierTable.h" |
27 | #include "clang/Basic/LLVM.h" |
28 | #include "clang/Basic/Linkage.h" |
29 | #include "clang/Basic/OperatorKinds.h" |
30 | #include "clang/Basic/PartialDiagnostic.h" |
31 | #include "clang/Basic/PragmaKinds.h" |
32 | #include "clang/Basic/SourceLocation.h" |
33 | #include "clang/Basic/Specifiers.h" |
34 | #include "clang/Basic/Visibility.h" |
35 | #include "llvm/ADT/APSInt.h" |
36 | #include "llvm/ADT/ArrayRef.h" |
37 | #include "llvm/ADT/Optional.h" |
38 | #include "llvm/ADT/PointerIntPair.h" |
39 | #include "llvm/ADT/PointerUnion.h" |
40 | #include "llvm/ADT/StringRef.h" |
41 | #include "llvm/ADT/iterator_range.h" |
42 | #include "llvm/Support/Casting.h" |
43 | #include "llvm/Support/Compiler.h" |
44 | #include "llvm/Support/TrailingObjects.h" |
45 | #include <cassert> |
46 | #include <cstddef> |
47 | #include <cstdint> |
48 | #include <string> |
49 | #include <utility> |
50 | |
51 | namespace clang { |
52 | |
53 | class ASTContext; |
54 | struct ASTTemplateArgumentListInfo; |
55 | class Attr; |
56 | class CompoundStmt; |
57 | class DependentFunctionTemplateSpecializationInfo; |
58 | class EnumDecl; |
59 | class Expr; |
60 | class FunctionTemplateDecl; |
61 | class FunctionTemplateSpecializationInfo; |
62 | class LabelStmt; |
63 | class MemberSpecializationInfo; |
64 | class Module; |
65 | class NamespaceDecl; |
66 | class ParmVarDecl; |
67 | class RecordDecl; |
68 | class Stmt; |
69 | class StringLiteral; |
70 | class TagDecl; |
71 | class TemplateArgumentList; |
72 | class TemplateArgumentListInfo; |
73 | class TemplateParameterList; |
74 | class TypeAliasTemplateDecl; |
75 | class TypeLoc; |
76 | class UnresolvedSetImpl; |
77 | class VarTemplateDecl; |
78 | |
79 | /// A container of type source information. |
80 | /// |
81 | /// A client can read the relevant info using TypeLoc wrappers, e.g: |
82 | /// @code |
83 | /// TypeLoc TL = TypeSourceInfo->getTypeLoc(); |
84 | /// TL.getBeginLoc().print(OS, SrcMgr); |
85 | /// @endcode |
86 | class alignas(8) TypeSourceInfo { |
87 | // Contains a memory block after the class, used for type source information, |
88 | // allocated by ASTContext. |
89 | friend class ASTContext; |
90 | |
91 | QualType Ty; |
92 | |
93 | TypeSourceInfo(QualType ty) : Ty(ty) {} |
94 | |
95 | public: |
96 | /// Return the type wrapped by this type source info. |
97 | QualType getType() const { return Ty; } |
98 | |
99 | /// Return the TypeLoc wrapper for the type source info. |
100 | TypeLoc getTypeLoc() const; // implemented in TypeLoc.h |
101 | |
102 | /// Override the type stored in this TypeSourceInfo. Use with caution! |
103 | void overrideType(QualType T) { Ty = T; } |
104 | }; |
105 | |
106 | /// The top declaration context. |
107 | class TranslationUnitDecl : public Decl, public DeclContext { |
108 | ASTContext &Ctx; |
109 | |
110 | /// The (most recently entered) anonymous namespace for this |
111 | /// translation unit, if one has been created. |
112 | NamespaceDecl *AnonymousNamespace = nullptr; |
113 | |
114 | explicit TranslationUnitDecl(ASTContext &ctx); |
115 | |
116 | virtual void anchor(); |
117 | |
118 | public: |
119 | ASTContext &getASTContext() const { return Ctx; } |
120 | |
121 | NamespaceDecl *getAnonymousNamespace() const { return AnonymousNamespace; } |
122 | void setAnonymousNamespace(NamespaceDecl *D) { AnonymousNamespace = D; } |
123 | |
124 | static TranslationUnitDecl *Create(ASTContext &C); |
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 == TranslationUnit; } |
129 | static DeclContext *castToDeclContext(const TranslationUnitDecl *D) { |
130 | return static_cast<DeclContext *>(const_cast<TranslationUnitDecl*>(D)); |
131 | } |
132 | static TranslationUnitDecl *castFromDeclContext(const DeclContext *DC) { |
133 | return static_cast<TranslationUnitDecl *>(const_cast<DeclContext*>(DC)); |
134 | } |
135 | }; |
136 | |
137 | /// Represents a `#pragma comment` line. Always a child of |
138 | /// TranslationUnitDecl. |
139 | class PragmaCommentDecl final |
140 | : public Decl, |
141 | private llvm::TrailingObjects<PragmaCommentDecl, char> { |
142 | friend class ASTDeclReader; |
143 | friend class ASTDeclWriter; |
144 | friend TrailingObjects; |
145 | |
146 | PragmaMSCommentKind CommentKind; |
147 | |
148 | PragmaCommentDecl(TranslationUnitDecl *TU, SourceLocation CommentLoc, |
149 | PragmaMSCommentKind CommentKind) |
150 | : Decl(PragmaComment, TU, CommentLoc), CommentKind(CommentKind) {} |
151 | |
152 | virtual void anchor(); |
153 | |
154 | public: |
155 | static PragmaCommentDecl *Create(const ASTContext &C, TranslationUnitDecl *DC, |
156 | SourceLocation CommentLoc, |
157 | PragmaMSCommentKind CommentKind, |
158 | StringRef Arg); |
159 | static PragmaCommentDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
160 | unsigned ArgSize); |
161 | |
162 | PragmaMSCommentKind getCommentKind() const { return CommentKind; } |
163 | |
164 | StringRef getArg() const { return getTrailingObjects<char>(); } |
165 | |
166 | // Implement isa/cast/dyncast/etc. |
167 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
168 | static bool classofKind(Kind K) { return K == PragmaComment; } |
169 | }; |
170 | |
171 | /// Represents a `#pragma detect_mismatch` line. Always a child of |
172 | /// TranslationUnitDecl. |
173 | class PragmaDetectMismatchDecl final |
174 | : public Decl, |
175 | private llvm::TrailingObjects<PragmaDetectMismatchDecl, char> { |
176 | friend class ASTDeclReader; |
177 | friend class ASTDeclWriter; |
178 | friend TrailingObjects; |
179 | |
180 | size_t ValueStart; |
181 | |
182 | PragmaDetectMismatchDecl(TranslationUnitDecl *TU, SourceLocation Loc, |
183 | size_t ValueStart) |
184 | : Decl(PragmaDetectMismatch, TU, Loc), ValueStart(ValueStart) {} |
185 | |
186 | virtual void anchor(); |
187 | |
188 | public: |
189 | static PragmaDetectMismatchDecl *Create(const ASTContext &C, |
190 | TranslationUnitDecl *DC, |
191 | SourceLocation Loc, StringRef Name, |
192 | StringRef Value); |
193 | static PragmaDetectMismatchDecl * |
194 | CreateDeserialized(ASTContext &C, unsigned ID, unsigned NameValueSize); |
195 | |
196 | StringRef getName() const { return getTrailingObjects<char>(); } |
197 | StringRef getValue() const { return getTrailingObjects<char>() + ValueStart; } |
198 | |
199 | // Implement isa/cast/dyncast/etc. |
200 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
201 | static bool classofKind(Kind K) { return K == PragmaDetectMismatch; } |
202 | }; |
203 | |
204 | /// Declaration context for names declared as extern "C" in C++. This |
205 | /// is neither the semantic nor lexical context for such declarations, but is |
206 | /// used to check for conflicts with other extern "C" declarations. Example: |
207 | /// |
208 | /// \code |
209 | /// namespace N { extern "C" void f(); } // #1 |
210 | /// void N::f() {} // #2 |
211 | /// namespace M { extern "C" void f(); } // #3 |
212 | /// \endcode |
213 | /// |
214 | /// The semantic context of #1 is namespace N and its lexical context is the |
215 | /// LinkageSpecDecl; the semantic context of #2 is namespace N and its lexical |
216 | /// context is the TU. However, both declarations are also visible in the |
217 | /// extern "C" context. |
218 | /// |
219 | /// The declaration at #3 finds it is a redeclaration of \c N::f through |
220 | /// lookup in the extern "C" context. |
221 | class ExternCContextDecl : public Decl, public DeclContext { |
222 | explicit ExternCContextDecl(TranslationUnitDecl *TU) |
223 | : Decl(ExternCContext, TU, SourceLocation()), |
224 | DeclContext(ExternCContext) {} |
225 | |
226 | virtual void anchor(); |
227 | |
228 | public: |
229 | static ExternCContextDecl *Create(const ASTContext &C, |
230 | TranslationUnitDecl *TU); |
231 | |
232 | // Implement isa/cast/dyncast/etc. |
233 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
234 | static bool classofKind(Kind K) { return K == ExternCContext; } |
235 | static DeclContext *castToDeclContext(const ExternCContextDecl *D) { |
236 | return static_cast<DeclContext *>(const_cast<ExternCContextDecl*>(D)); |
237 | } |
238 | static ExternCContextDecl *castFromDeclContext(const DeclContext *DC) { |
239 | return static_cast<ExternCContextDecl *>(const_cast<DeclContext*>(DC)); |
240 | } |
241 | }; |
242 | |
243 | /// This represents a decl that may have a name. Many decls have names such |
244 | /// as ObjCMethodDecl, but not \@class, etc. |
245 | /// |
246 | /// Note that not every NamedDecl is actually named (e.g., a struct might |
247 | /// be anonymous), and not every name is an identifier. |
248 | class NamedDecl : public Decl { |
249 | /// The name of this declaration, which is typically a normal |
250 | /// identifier but may also be a special kind of name (C++ |
251 | /// constructor, Objective-C selector, etc.) |
252 | DeclarationName Name; |
253 | |
254 | virtual void anchor(); |
255 | |
256 | private: |
257 | NamedDecl *getUnderlyingDeclImpl() LLVM_READONLY__attribute__((__pure__)); |
258 | |
259 | protected: |
260 | NamedDecl(Kind DK, DeclContext *DC, SourceLocation L, DeclarationName N) |
261 | : Decl(DK, DC, L), Name(N) {} |
262 | |
263 | public: |
264 | /// Get the identifier that names this declaration, if there is one. |
265 | /// |
266 | /// This will return NULL if this declaration has no name (e.g., for |
267 | /// an unnamed class) or if the name is a special name (C++ constructor, |
268 | /// Objective-C selector, etc.). |
269 | IdentifierInfo *getIdentifier() const { return Name.getAsIdentifierInfo(); } |
270 | |
271 | /// Get the name of identifier for this declaration as a StringRef. |
272 | /// |
273 | /// This requires that the declaration have a name and that it be a simple |
274 | /// identifier. |
275 | StringRef getName() const { |
276 | assert(Name.isIdentifier() && "Name is not a simple identifier")((Name.isIdentifier() && "Name is not a simple identifier" ) ? static_cast<void> (0) : __assert_fail ("Name.isIdentifier() && \"Name is not a simple identifier\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 276, __PRETTY_FUNCTION__)); |
277 | return getIdentifier() ? getIdentifier()->getName() : ""; |
278 | } |
279 | |
280 | /// Get a human-readable name for the declaration, even if it is one of the |
281 | /// special kinds of names (C++ constructor, Objective-C selector, etc). |
282 | /// |
283 | /// Creating this name requires expensive string manipulation, so it should |
284 | /// be called only when performance doesn't matter. For simple declarations, |
285 | /// getNameAsCString() should suffice. |
286 | // |
287 | // FIXME: This function should be renamed to indicate that it is not just an |
288 | // alternate form of getName(), and clients should move as appropriate. |
289 | // |
290 | // FIXME: Deprecated, move clients to getName(). |
291 | std::string getNameAsString() const { return Name.getAsString(); } |
292 | |
293 | virtual void printName(raw_ostream &os) const; |
294 | |
295 | /// Get the actual, stored name of the declaration, which may be a special |
296 | /// name. |
297 | DeclarationName getDeclName() const { return Name; } |
298 | |
299 | /// Set the name of this declaration. |
300 | void setDeclName(DeclarationName N) { Name = N; } |
301 | |
302 | /// Returns a human-readable qualified name for this declaration, like |
303 | /// A::B::i, for i being member of namespace A::B. |
304 | /// |
305 | /// If the declaration is not a member of context which can be named (record, |
306 | /// namespace), it will return the same result as printName(). |
307 | /// |
308 | /// Creating this name is expensive, so it should be called only when |
309 | /// performance doesn't matter. |
310 | void printQualifiedName(raw_ostream &OS) const; |
311 | void printQualifiedName(raw_ostream &OS, const PrintingPolicy &Policy) const; |
312 | |
313 | /// Print only the nested name specifier part of a fully-qualified name, |
314 | /// including the '::' at the end. E.g. |
315 | /// when `printQualifiedName(D)` prints "A::B::i", |
316 | /// this function prints "A::B::". |
317 | void printNestedNameSpecifier(raw_ostream &OS) const; |
318 | void printNestedNameSpecifier(raw_ostream &OS, |
319 | const PrintingPolicy &Policy) const; |
320 | |
321 | // FIXME: Remove string version. |
322 | std::string getQualifiedNameAsString() const; |
323 | |
324 | /// Appends a human-readable name for this declaration into the given stream. |
325 | /// |
326 | /// This is the method invoked by Sema when displaying a NamedDecl |
327 | /// in a diagnostic. It does not necessarily produce the same |
328 | /// result as printName(); for example, class template |
329 | /// specializations are printed with their template arguments. |
330 | virtual void getNameForDiagnostic(raw_ostream &OS, |
331 | const PrintingPolicy &Policy, |
332 | bool Qualified) const; |
333 | |
334 | /// Determine whether this declaration, if known to be well-formed within |
335 | /// its context, will replace the declaration OldD if introduced into scope. |
336 | /// |
337 | /// A declaration will replace another declaration if, for example, it is |
338 | /// a redeclaration of the same variable or function, but not if it is a |
339 | /// declaration of a different kind (function vs. class) or an overloaded |
340 | /// function. |
341 | /// |
342 | /// \param IsKnownNewer \c true if this declaration is known to be newer |
343 | /// than \p OldD (for instance, if this declaration is newly-created). |
344 | bool declarationReplaces(NamedDecl *OldD, bool IsKnownNewer = true) const; |
345 | |
346 | /// Determine whether this declaration has linkage. |
347 | bool hasLinkage() const; |
348 | |
349 | using Decl::isModulePrivate; |
350 | using Decl::setModulePrivate; |
351 | |
352 | /// Determine whether this declaration is a C++ class member. |
353 | bool isCXXClassMember() const { |
354 | const DeclContext *DC = getDeclContext(); |
355 | |
356 | // C++0x [class.mem]p1: |
357 | // The enumerators of an unscoped enumeration defined in |
358 | // the class are members of the class. |
359 | if (isa<EnumDecl>(DC)) |
360 | DC = DC->getRedeclContext(); |
361 | |
362 | return DC->isRecord(); |
363 | } |
364 | |
365 | /// Determine whether the given declaration is an instance member of |
366 | /// a C++ class. |
367 | bool isCXXInstanceMember() const; |
368 | |
369 | /// Determine what kind of linkage this entity has. |
370 | /// |
371 | /// This is not the linkage as defined by the standard or the codegen notion |
372 | /// of linkage. It is just an implementation detail that is used to compute |
373 | /// those. |
374 | Linkage getLinkageInternal() const; |
375 | |
376 | /// Get the linkage from a semantic point of view. Entities in |
377 | /// anonymous namespaces are external (in c++98). |
378 | Linkage getFormalLinkage() const { |
379 | return clang::getFormalLinkage(getLinkageInternal()); |
380 | } |
381 | |
382 | /// True if this decl has external linkage. |
383 | bool hasExternalFormalLinkage() const { |
384 | return isExternalFormalLinkage(getLinkageInternal()); |
385 | } |
386 | |
387 | bool isExternallyVisible() const { |
388 | return clang::isExternallyVisible(getLinkageInternal()); |
389 | } |
390 | |
391 | /// Determine whether this declaration can be redeclared in a |
392 | /// different translation unit. |
393 | bool isExternallyDeclarable() const { |
394 | return isExternallyVisible() && !getOwningModuleForLinkage(); |
395 | } |
396 | |
397 | /// Determines the visibility of this entity. |
398 | Visibility getVisibility() const { |
399 | return getLinkageAndVisibility().getVisibility(); |
400 | } |
401 | |
402 | /// Determines the linkage and visibility of this entity. |
403 | LinkageInfo getLinkageAndVisibility() const; |
404 | |
405 | /// Kinds of explicit visibility. |
406 | enum ExplicitVisibilityKind { |
407 | /// Do an LV computation for, ultimately, a type. |
408 | /// Visibility may be restricted by type visibility settings and |
409 | /// the visibility of template arguments. |
410 | VisibilityForType, |
411 | |
412 | /// Do an LV computation for, ultimately, a non-type declaration. |
413 | /// Visibility may be restricted by value visibility settings and |
414 | /// the visibility of template arguments. |
415 | VisibilityForValue |
416 | }; |
417 | |
418 | /// If visibility was explicitly specified for this |
419 | /// declaration, return that visibility. |
420 | Optional<Visibility> |
421 | getExplicitVisibility(ExplicitVisibilityKind kind) const; |
422 | |
423 | /// True if the computed linkage is valid. Used for consistency |
424 | /// checking. Should always return true. |
425 | bool isLinkageValid() const; |
426 | |
427 | /// True if something has required us to compute the linkage |
428 | /// of this declaration. |
429 | /// |
430 | /// Language features which can retroactively change linkage (like a |
431 | /// typedef name for linkage purposes) may need to consider this, |
432 | /// but hopefully only in transitory ways during parsing. |
433 | bool hasLinkageBeenComputed() const { |
434 | return hasCachedLinkage(); |
435 | } |
436 | |
437 | /// Looks through UsingDecls and ObjCCompatibleAliasDecls for |
438 | /// the underlying named decl. |
439 | NamedDecl *getUnderlyingDecl() { |
440 | // Fast-path the common case. |
441 | if (this->getKind() != UsingShadow && |
442 | this->getKind() != ConstructorUsingShadow && |
443 | this->getKind() != ObjCCompatibleAlias && |
444 | this->getKind() != NamespaceAlias) |
445 | return this; |
446 | |
447 | return getUnderlyingDeclImpl(); |
448 | } |
449 | const NamedDecl *getUnderlyingDecl() const { |
450 | return const_cast<NamedDecl*>(this)->getUnderlyingDecl(); |
451 | } |
452 | |
453 | NamedDecl *getMostRecentDecl() { |
454 | return cast<NamedDecl>(static_cast<Decl *>(this)->getMostRecentDecl()); |
455 | } |
456 | const NamedDecl *getMostRecentDecl() const { |
457 | return const_cast<NamedDecl*>(this)->getMostRecentDecl(); |
458 | } |
459 | |
460 | ObjCStringFormatFamily getObjCFStringFormattingFamily() const; |
461 | |
462 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
463 | static bool classofKind(Kind K) { return K >= firstNamed && K <= lastNamed; } |
464 | }; |
465 | |
466 | inline raw_ostream &operator<<(raw_ostream &OS, const NamedDecl &ND) { |
467 | ND.printName(OS); |
468 | return OS; |
469 | } |
470 | |
471 | /// Represents the declaration of a label. Labels also have a |
472 | /// corresponding LabelStmt, which indicates the position that the label was |
473 | /// defined at. For normal labels, the location of the decl is the same as the |
474 | /// location of the statement. For GNU local labels (__label__), the decl |
475 | /// location is where the __label__ is. |
476 | class LabelDecl : public NamedDecl { |
477 | LabelStmt *TheStmt; |
478 | StringRef MSAsmName; |
479 | bool MSAsmNameResolved = false; |
480 | |
481 | /// For normal labels, this is the same as the main declaration |
482 | /// label, i.e., the location of the identifier; for GNU local labels, |
483 | /// this is the location of the __label__ keyword. |
484 | SourceLocation LocStart; |
485 | |
486 | LabelDecl(DeclContext *DC, SourceLocation IdentL, IdentifierInfo *II, |
487 | LabelStmt *S, SourceLocation StartL) |
488 | : NamedDecl(Label, DC, IdentL, II), TheStmt(S), LocStart(StartL) {} |
489 | |
490 | void anchor() override; |
491 | |
492 | public: |
493 | static LabelDecl *Create(ASTContext &C, DeclContext *DC, |
494 | SourceLocation IdentL, IdentifierInfo *II); |
495 | static LabelDecl *Create(ASTContext &C, DeclContext *DC, |
496 | SourceLocation IdentL, IdentifierInfo *II, |
497 | SourceLocation GnuLabelL); |
498 | static LabelDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
499 | |
500 | LabelStmt *getStmt() const { return TheStmt; } |
501 | void setStmt(LabelStmt *T) { TheStmt = T; } |
502 | |
503 | bool isGnuLocal() const { return LocStart != getLocation(); } |
504 | void setLocStart(SourceLocation L) { LocStart = L; } |
505 | |
506 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
507 | return SourceRange(LocStart, getLocation()); |
508 | } |
509 | |
510 | bool isMSAsmLabel() const { return !MSAsmName.empty(); } |
511 | bool isResolvedMSAsmLabel() const { return isMSAsmLabel() && MSAsmNameResolved; } |
512 | void setMSAsmLabel(StringRef Name); |
513 | StringRef getMSAsmLabel() const { return MSAsmName; } |
514 | void setMSAsmLabelResolved() { MSAsmNameResolved = true; } |
515 | |
516 | // Implement isa/cast/dyncast/etc. |
517 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
518 | static bool classofKind(Kind K) { return K == Label; } |
519 | }; |
520 | |
521 | /// Represent a C++ namespace. |
522 | class NamespaceDecl : public NamedDecl, public DeclContext, |
523 | public Redeclarable<NamespaceDecl> |
524 | { |
525 | /// The starting location of the source range, pointing |
526 | /// to either the namespace or the inline keyword. |
527 | SourceLocation LocStart; |
528 | |
529 | /// The ending location of the source range. |
530 | SourceLocation RBraceLoc; |
531 | |
532 | /// A pointer to either the anonymous namespace that lives just inside |
533 | /// this namespace or to the first namespace in the chain (the latter case |
534 | /// only when this is not the first in the chain), along with a |
535 | /// boolean value indicating whether this is an inline namespace. |
536 | llvm::PointerIntPair<NamespaceDecl *, 1, bool> AnonOrFirstNamespaceAndInline; |
537 | |
538 | NamespaceDecl(ASTContext &C, DeclContext *DC, bool Inline, |
539 | SourceLocation StartLoc, SourceLocation IdLoc, |
540 | IdentifierInfo *Id, NamespaceDecl *PrevDecl); |
541 | |
542 | using redeclarable_base = Redeclarable<NamespaceDecl>; |
543 | |
544 | NamespaceDecl *getNextRedeclarationImpl() override; |
545 | NamespaceDecl *getPreviousDeclImpl() override; |
546 | NamespaceDecl *getMostRecentDeclImpl() override; |
547 | |
548 | public: |
549 | friend class ASTDeclReader; |
550 | friend class ASTDeclWriter; |
551 | |
552 | static NamespaceDecl *Create(ASTContext &C, DeclContext *DC, |
553 | bool Inline, SourceLocation StartLoc, |
554 | SourceLocation IdLoc, IdentifierInfo *Id, |
555 | NamespaceDecl *PrevDecl); |
556 | |
557 | static NamespaceDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
558 | |
559 | using redecl_range = redeclarable_base::redecl_range; |
560 | using redecl_iterator = redeclarable_base::redecl_iterator; |
561 | |
562 | using redeclarable_base::redecls_begin; |
563 | using redeclarable_base::redecls_end; |
564 | using redeclarable_base::redecls; |
565 | using redeclarable_base::getPreviousDecl; |
566 | using redeclarable_base::getMostRecentDecl; |
567 | using redeclarable_base::isFirstDecl; |
568 | |
569 | /// Returns true if this is an anonymous namespace declaration. |
570 | /// |
571 | /// For example: |
572 | /// \code |
573 | /// namespace { |
574 | /// ... |
575 | /// }; |
576 | /// \endcode |
577 | /// q.v. C++ [namespace.unnamed] |
578 | bool isAnonymousNamespace() const { |
579 | return !getIdentifier(); |
580 | } |
581 | |
582 | /// Returns true if this is an inline namespace declaration. |
583 | bool isInline() const { |
584 | return AnonOrFirstNamespaceAndInline.getInt(); |
585 | } |
586 | |
587 | /// Set whether this is an inline namespace declaration. |
588 | void setInline(bool Inline) { |
589 | AnonOrFirstNamespaceAndInline.setInt(Inline); |
590 | } |
591 | |
592 | /// Get the original (first) namespace declaration. |
593 | NamespaceDecl *getOriginalNamespace(); |
594 | |
595 | /// Get the original (first) namespace declaration. |
596 | const NamespaceDecl *getOriginalNamespace() const; |
597 | |
598 | /// Return true if this declaration is an original (first) declaration |
599 | /// of the namespace. This is false for non-original (subsequent) namespace |
600 | /// declarations and anonymous namespaces. |
601 | bool isOriginalNamespace() const; |
602 | |
603 | /// Retrieve the anonymous namespace nested inside this namespace, |
604 | /// if any. |
605 | NamespaceDecl *getAnonymousNamespace() const { |
606 | return getOriginalNamespace()->AnonOrFirstNamespaceAndInline.getPointer(); |
607 | } |
608 | |
609 | void setAnonymousNamespace(NamespaceDecl *D) { |
610 | getOriginalNamespace()->AnonOrFirstNamespaceAndInline.setPointer(D); |
611 | } |
612 | |
613 | /// Retrieves the canonical declaration of this namespace. |
614 | NamespaceDecl *getCanonicalDecl() override { |
615 | return getOriginalNamespace(); |
616 | } |
617 | const NamespaceDecl *getCanonicalDecl() const { |
618 | return getOriginalNamespace(); |
619 | } |
620 | |
621 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
622 | return SourceRange(LocStart, RBraceLoc); |
623 | } |
624 | |
625 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return LocStart; } |
626 | SourceLocation getRBraceLoc() const { return RBraceLoc; } |
627 | void setLocStart(SourceLocation L) { LocStart = L; } |
628 | void setRBraceLoc(SourceLocation L) { RBraceLoc = L; } |
629 | |
630 | // Implement isa/cast/dyncast/etc. |
631 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
632 | static bool classofKind(Kind K) { return K == Namespace; } |
633 | static DeclContext *castToDeclContext(const NamespaceDecl *D) { |
634 | return static_cast<DeclContext *>(const_cast<NamespaceDecl*>(D)); |
635 | } |
636 | static NamespaceDecl *castFromDeclContext(const DeclContext *DC) { |
637 | return static_cast<NamespaceDecl *>(const_cast<DeclContext*>(DC)); |
638 | } |
639 | }; |
640 | |
641 | /// Represent the declaration of a variable (in which case it is |
642 | /// an lvalue) a function (in which case it is a function designator) or |
643 | /// an enum constant. |
644 | class ValueDecl : public NamedDecl { |
645 | QualType DeclType; |
646 | |
647 | void anchor() override; |
648 | |
649 | protected: |
650 | ValueDecl(Kind DK, DeclContext *DC, SourceLocation L, |
651 | DeclarationName N, QualType T) |
652 | : NamedDecl(DK, DC, L, N), DeclType(T) {} |
653 | |
654 | public: |
655 | QualType getType() const { return DeclType; } |
656 | void setType(QualType newType) { DeclType = newType; } |
657 | |
658 | /// Determine whether this symbol is weakly-imported, |
659 | /// or declared with the weak or weak-ref attr. |
660 | bool isWeak() const; |
661 | |
662 | // Implement isa/cast/dyncast/etc. |
663 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
664 | static bool classofKind(Kind K) { return K >= firstValue && K <= lastValue; } |
665 | }; |
666 | |
667 | /// A struct with extended info about a syntactic |
668 | /// name qualifier, to be used for the case of out-of-line declarations. |
669 | struct QualifierInfo { |
670 | NestedNameSpecifierLoc QualifierLoc; |
671 | |
672 | /// The number of "outer" template parameter lists. |
673 | /// The count includes all of the template parameter lists that were matched |
674 | /// against the template-ids occurring into the NNS and possibly (in the |
675 | /// case of an explicit specialization) a final "template <>". |
676 | unsigned NumTemplParamLists = 0; |
677 | |
678 | /// A new-allocated array of size NumTemplParamLists, |
679 | /// containing pointers to the "outer" template parameter lists. |
680 | /// It includes all of the template parameter lists that were matched |
681 | /// against the template-ids occurring into the NNS and possibly (in the |
682 | /// case of an explicit specialization) a final "template <>". |
683 | TemplateParameterList** TemplParamLists = nullptr; |
684 | |
685 | QualifierInfo() = default; |
686 | QualifierInfo(const QualifierInfo &) = delete; |
687 | QualifierInfo& operator=(const QualifierInfo &) = delete; |
688 | |
689 | /// Sets info about "outer" template parameter lists. |
690 | void setTemplateParameterListsInfo(ASTContext &Context, |
691 | ArrayRef<TemplateParameterList *> TPLists); |
692 | }; |
693 | |
694 | /// Represents a ValueDecl that came out of a declarator. |
695 | /// Contains type source information through TypeSourceInfo. |
696 | class DeclaratorDecl : public ValueDecl { |
697 | // A struct representing both a TInfo and a syntactic qualifier, |
698 | // to be used for the (uncommon) case of out-of-line declarations. |
699 | struct ExtInfo : public QualifierInfo { |
700 | TypeSourceInfo *TInfo; |
701 | }; |
702 | |
703 | llvm::PointerUnion<TypeSourceInfo *, ExtInfo *> DeclInfo; |
704 | |
705 | /// The start of the source range for this declaration, |
706 | /// ignoring outer template declarations. |
707 | SourceLocation InnerLocStart; |
708 | |
709 | bool hasExtInfo() const { return DeclInfo.is<ExtInfo*>(); } |
710 | ExtInfo *getExtInfo() { return DeclInfo.get<ExtInfo*>(); } |
711 | const ExtInfo *getExtInfo() const { return DeclInfo.get<ExtInfo*>(); } |
712 | |
713 | protected: |
714 | DeclaratorDecl(Kind DK, DeclContext *DC, SourceLocation L, |
715 | DeclarationName N, QualType T, TypeSourceInfo *TInfo, |
716 | SourceLocation StartL) |
717 | : ValueDecl(DK, DC, L, N, T), DeclInfo(TInfo), InnerLocStart(StartL) {} |
718 | |
719 | public: |
720 | friend class ASTDeclReader; |
721 | friend class ASTDeclWriter; |
722 | |
723 | TypeSourceInfo *getTypeSourceInfo() const { |
724 | return hasExtInfo() |
725 | ? getExtInfo()->TInfo |
726 | : DeclInfo.get<TypeSourceInfo*>(); |
727 | } |
728 | |
729 | void setTypeSourceInfo(TypeSourceInfo *TI) { |
730 | if (hasExtInfo()) |
731 | getExtInfo()->TInfo = TI; |
732 | else |
733 | DeclInfo = TI; |
734 | } |
735 | |
736 | /// Return start of source range ignoring outer template declarations. |
737 | SourceLocation getInnerLocStart() const { return InnerLocStart; } |
738 | void setInnerLocStart(SourceLocation L) { InnerLocStart = L; } |
739 | |
740 | /// Return start of source range taking into account any outer template |
741 | /// declarations. |
742 | SourceLocation getOuterLocStart() const; |
743 | |
744 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
745 | |
746 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { |
747 | return getOuterLocStart(); |
748 | } |
749 | |
750 | /// Retrieve the nested-name-specifier that qualifies the name of this |
751 | /// declaration, if it was present in the source. |
752 | NestedNameSpecifier *getQualifier() const { |
753 | return hasExtInfo() ? getExtInfo()->QualifierLoc.getNestedNameSpecifier() |
754 | : nullptr; |
755 | } |
756 | |
757 | /// Retrieve the nested-name-specifier (with source-location |
758 | /// information) that qualifies the name of this declaration, if it was |
759 | /// present in the source. |
760 | NestedNameSpecifierLoc getQualifierLoc() const { |
761 | return hasExtInfo() ? getExtInfo()->QualifierLoc |
762 | : NestedNameSpecifierLoc(); |
763 | } |
764 | |
765 | void setQualifierInfo(NestedNameSpecifierLoc QualifierLoc); |
766 | |
767 | unsigned getNumTemplateParameterLists() const { |
768 | return hasExtInfo() ? getExtInfo()->NumTemplParamLists : 0; |
769 | } |
770 | |
771 | TemplateParameterList *getTemplateParameterList(unsigned index) const { |
772 | assert(index < getNumTemplateParameterLists())((index < getNumTemplateParameterLists()) ? static_cast< void> (0) : __assert_fail ("index < getNumTemplateParameterLists()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 772, __PRETTY_FUNCTION__)); |
773 | return getExtInfo()->TemplParamLists[index]; |
774 | } |
775 | |
776 | void setTemplateParameterListsInfo(ASTContext &Context, |
777 | ArrayRef<TemplateParameterList *> TPLists); |
778 | |
779 | SourceLocation getTypeSpecStartLoc() const; |
780 | |
781 | // Implement isa/cast/dyncast/etc. |
782 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
783 | static bool classofKind(Kind K) { |
784 | return K >= firstDeclarator && K <= lastDeclarator; |
785 | } |
786 | }; |
787 | |
788 | /// Structure used to store a statement, the constant value to |
789 | /// which it was evaluated (if any), and whether or not the statement |
790 | /// is an integral constant expression (if known). |
791 | struct EvaluatedStmt { |
792 | /// Whether this statement was already evaluated. |
793 | bool WasEvaluated : 1; |
794 | |
795 | /// Whether this statement is being evaluated. |
796 | bool IsEvaluating : 1; |
797 | |
798 | /// Whether we already checked whether this statement was an |
799 | /// integral constant expression. |
800 | bool CheckedICE : 1; |
801 | |
802 | /// Whether we are checking whether this statement is an |
803 | /// integral constant expression. |
804 | bool CheckingICE : 1; |
805 | |
806 | /// Whether this statement is an integral constant expression, |
807 | /// or in C++11, whether the statement is a constant expression. Only |
808 | /// valid if CheckedICE is true. |
809 | bool IsICE : 1; |
810 | |
811 | /// Whether this variable is known to have constant destruction. That is, |
812 | /// whether running the destructor on the initial value is a side-effect |
813 | /// (and doesn't inspect any state that might have changed during program |
814 | /// execution). This is currently only computed if the destructor is |
815 | /// non-trivial. |
816 | bool HasConstantDestruction : 1; |
817 | |
818 | Stmt *Value; |
819 | APValue Evaluated; |
820 | |
821 | EvaluatedStmt() |
822 | : WasEvaluated(false), IsEvaluating(false), CheckedICE(false), |
823 | CheckingICE(false), IsICE(false), HasConstantDestruction(false) {} |
824 | }; |
825 | |
826 | /// Represents a variable declaration or definition. |
827 | class VarDecl : public DeclaratorDecl, public Redeclarable<VarDecl> { |
828 | public: |
829 | /// Initialization styles. |
830 | enum InitializationStyle { |
831 | /// C-style initialization with assignment |
832 | CInit, |
833 | |
834 | /// Call-style initialization (C++98) |
835 | CallInit, |
836 | |
837 | /// Direct list-initialization (C++11) |
838 | ListInit |
839 | }; |
840 | |
841 | /// Kinds of thread-local storage. |
842 | enum TLSKind { |
843 | /// Not a TLS variable. |
844 | TLS_None, |
845 | |
846 | /// TLS with a known-constant initializer. |
847 | TLS_Static, |
848 | |
849 | /// TLS with a dynamic initializer. |
850 | TLS_Dynamic |
851 | }; |
852 | |
853 | /// Return the string used to specify the storage class \p SC. |
854 | /// |
855 | /// It is illegal to call this function with SC == None. |
856 | static const char *getStorageClassSpecifierString(StorageClass SC); |
857 | |
858 | protected: |
859 | // A pointer union of Stmt * and EvaluatedStmt *. When an EvaluatedStmt, we |
860 | // have allocated the auxiliary struct of information there. |
861 | // |
862 | // TODO: It is a bit unfortunate to use a PointerUnion inside the VarDecl for |
863 | // this as *many* VarDecls are ParmVarDecls that don't have default |
864 | // arguments. We could save some space by moving this pointer union to be |
865 | // allocated in trailing space when necessary. |
866 | using InitType = llvm::PointerUnion<Stmt *, EvaluatedStmt *>; |
867 | |
868 | /// The initializer for this variable or, for a ParmVarDecl, the |
869 | /// C++ default argument. |
870 | mutable InitType Init; |
871 | |
872 | private: |
873 | friend class ASTDeclReader; |
874 | friend class ASTNodeImporter; |
875 | friend class StmtIteratorBase; |
876 | |
877 | class VarDeclBitfields { |
878 | friend class ASTDeclReader; |
879 | friend class VarDecl; |
880 | |
881 | unsigned SClass : 3; |
882 | unsigned TSCSpec : 2; |
883 | unsigned InitStyle : 2; |
884 | |
885 | /// Whether this variable is an ARC pseudo-__strong variable; see |
886 | /// isARCPseudoStrong() for details. |
887 | unsigned ARCPseudoStrong : 1; |
888 | }; |
889 | enum { NumVarDeclBits = 8 }; |
890 | |
891 | protected: |
892 | enum { NumParameterIndexBits = 8 }; |
893 | |
894 | enum DefaultArgKind { |
895 | DAK_None, |
896 | DAK_Unparsed, |
897 | DAK_Uninstantiated, |
898 | DAK_Normal |
899 | }; |
900 | |
901 | class ParmVarDeclBitfields { |
902 | friend class ASTDeclReader; |
903 | friend class ParmVarDecl; |
904 | |
905 | unsigned : NumVarDeclBits; |
906 | |
907 | /// Whether this parameter inherits a default argument from a |
908 | /// prior declaration. |
909 | unsigned HasInheritedDefaultArg : 1; |
910 | |
911 | /// Describes the kind of default argument for this parameter. By default |
912 | /// this is none. If this is normal, then the default argument is stored in |
913 | /// the \c VarDecl initializer expression unless we were unable to parse |
914 | /// (even an invalid) expression for the default argument. |
915 | unsigned DefaultArgKind : 2; |
916 | |
917 | /// Whether this parameter undergoes K&R argument promotion. |
918 | unsigned IsKNRPromoted : 1; |
919 | |
920 | /// Whether this parameter is an ObjC method parameter or not. |
921 | unsigned IsObjCMethodParam : 1; |
922 | |
923 | /// If IsObjCMethodParam, a Decl::ObjCDeclQualifier. |
924 | /// Otherwise, the number of function parameter scopes enclosing |
925 | /// the function parameter scope in which this parameter was |
926 | /// declared. |
927 | unsigned ScopeDepthOrObjCQuals : 7; |
928 | |
929 | /// The number of parameters preceding this parameter in the |
930 | /// function parameter scope in which it was declared. |
931 | unsigned ParameterIndex : NumParameterIndexBits; |
932 | }; |
933 | |
934 | class NonParmVarDeclBitfields { |
935 | friend class ASTDeclReader; |
936 | friend class ImplicitParamDecl; |
937 | friend class VarDecl; |
938 | |
939 | unsigned : NumVarDeclBits; |
940 | |
941 | // FIXME: We need something similar to CXXRecordDecl::DefinitionData. |
942 | /// Whether this variable is a definition which was demoted due to |
943 | /// module merge. |
944 | unsigned IsThisDeclarationADemotedDefinition : 1; |
945 | |
946 | /// Whether this variable is the exception variable in a C++ catch |
947 | /// or an Objective-C @catch statement. |
948 | unsigned ExceptionVar : 1; |
949 | |
950 | /// Whether this local variable could be allocated in the return |
951 | /// slot of its function, enabling the named return value optimization |
952 | /// (NRVO). |
953 | unsigned NRVOVariable : 1; |
954 | |
955 | /// Whether this variable is the for-range-declaration in a C++0x |
956 | /// for-range statement. |
957 | unsigned CXXForRangeDecl : 1; |
958 | |
959 | /// Whether this variable is the for-in loop declaration in Objective-C. |
960 | unsigned ObjCForDecl : 1; |
961 | |
962 | /// Whether this variable is (C++1z) inline. |
963 | unsigned IsInline : 1; |
964 | |
965 | /// Whether this variable has (C++1z) inline explicitly specified. |
966 | unsigned IsInlineSpecified : 1; |
967 | |
968 | /// Whether this variable is (C++0x) constexpr. |
969 | unsigned IsConstexpr : 1; |
970 | |
971 | /// Whether this variable is the implicit variable for a lambda |
972 | /// init-capture. |
973 | unsigned IsInitCapture : 1; |
974 | |
975 | /// Whether this local extern variable's previous declaration was |
976 | /// declared in the same block scope. This controls whether we should merge |
977 | /// the type of this declaration with its previous declaration. |
978 | unsigned PreviousDeclInSameBlockScope : 1; |
979 | |
980 | /// Defines kind of the ImplicitParamDecl: 'this', 'self', 'vtt', '_cmd' or |
981 | /// something else. |
982 | unsigned ImplicitParamKind : 3; |
983 | |
984 | unsigned EscapingByref : 1; |
985 | }; |
986 | |
987 | union { |
988 | unsigned AllBits; |
989 | VarDeclBitfields VarDeclBits; |
990 | ParmVarDeclBitfields ParmVarDeclBits; |
991 | NonParmVarDeclBitfields NonParmVarDeclBits; |
992 | }; |
993 | |
994 | VarDecl(Kind DK, ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
995 | SourceLocation IdLoc, IdentifierInfo *Id, QualType T, |
996 | TypeSourceInfo *TInfo, StorageClass SC); |
997 | |
998 | using redeclarable_base = Redeclarable<VarDecl>; |
999 | |
1000 | VarDecl *getNextRedeclarationImpl() override { |
1001 | return getNextRedeclaration(); |
1002 | } |
1003 | |
1004 | VarDecl *getPreviousDeclImpl() override { |
1005 | return getPreviousDecl(); |
1006 | } |
1007 | |
1008 | VarDecl *getMostRecentDeclImpl() override { |
1009 | return getMostRecentDecl(); |
1010 | } |
1011 | |
1012 | public: |
1013 | using redecl_range = redeclarable_base::redecl_range; |
1014 | using redecl_iterator = redeclarable_base::redecl_iterator; |
1015 | |
1016 | using redeclarable_base::redecls_begin; |
1017 | using redeclarable_base::redecls_end; |
1018 | using redeclarable_base::redecls; |
1019 | using redeclarable_base::getPreviousDecl; |
1020 | using redeclarable_base::getMostRecentDecl; |
1021 | using redeclarable_base::isFirstDecl; |
1022 | |
1023 | static VarDecl *Create(ASTContext &C, DeclContext *DC, |
1024 | SourceLocation StartLoc, SourceLocation IdLoc, |
1025 | IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo, |
1026 | StorageClass S); |
1027 | |
1028 | static VarDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1029 | |
1030 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
1031 | |
1032 | /// Returns the storage class as written in the source. For the |
1033 | /// computed linkage of symbol, see getLinkage. |
1034 | StorageClass getStorageClass() const { |
1035 | return (StorageClass) VarDeclBits.SClass; |
1036 | } |
1037 | void setStorageClass(StorageClass SC); |
1038 | |
1039 | void setTSCSpec(ThreadStorageClassSpecifier TSC) { |
1040 | VarDeclBits.TSCSpec = TSC; |
1041 | assert(VarDeclBits.TSCSpec == TSC && "truncation")((VarDeclBits.TSCSpec == TSC && "truncation") ? static_cast <void> (0) : __assert_fail ("VarDeclBits.TSCSpec == TSC && \"truncation\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1041, __PRETTY_FUNCTION__)); |
1042 | } |
1043 | ThreadStorageClassSpecifier getTSCSpec() const { |
1044 | return static_cast<ThreadStorageClassSpecifier>(VarDeclBits.TSCSpec); |
1045 | } |
1046 | TLSKind getTLSKind() const; |
1047 | |
1048 | /// Returns true if a variable with function scope is a non-static local |
1049 | /// variable. |
1050 | bool hasLocalStorage() const { |
1051 | if (getStorageClass() == SC_None) { |
1052 | // OpenCL v1.2 s6.5.3: The __constant or constant address space name is |
1053 | // used to describe variables allocated in global memory and which are |
1054 | // accessed inside a kernel(s) as read-only variables. As such, variables |
1055 | // in constant address space cannot have local storage. |
1056 | if (getType().getAddressSpace() == LangAS::opencl_constant) |
1057 | return false; |
1058 | // Second check is for C++11 [dcl.stc]p4. |
1059 | return !isFileVarDecl() && getTSCSpec() == TSCS_unspecified; |
1060 | } |
1061 | |
1062 | // Global Named Register (GNU extension) |
1063 | if (getStorageClass() == SC_Register && !isLocalVarDeclOrParm()) |
1064 | return false; |
1065 | |
1066 | // Return true for: Auto, Register. |
1067 | // Return false for: Extern, Static, PrivateExtern, OpenCLWorkGroupLocal. |
1068 | |
1069 | return getStorageClass() >= SC_Auto; |
1070 | } |
1071 | |
1072 | /// Returns true if a variable with function scope is a static local |
1073 | /// variable. |
1074 | bool isStaticLocal() const { |
1075 | return (getStorageClass() == SC_Static || |
1076 | // C++11 [dcl.stc]p4 |
1077 | (getStorageClass() == SC_None && getTSCSpec() == TSCS_thread_local)) |
1078 | && !isFileVarDecl(); |
1079 | } |
1080 | |
1081 | /// Returns true if a variable has extern or __private_extern__ |
1082 | /// storage. |
1083 | bool hasExternalStorage() const { |
1084 | return getStorageClass() == SC_Extern || |
1085 | getStorageClass() == SC_PrivateExtern; |
1086 | } |
1087 | |
1088 | /// Returns true for all variables that do not have local storage. |
1089 | /// |
1090 | /// This includes all global variables as well as static variables declared |
1091 | /// within a function. |
1092 | bool hasGlobalStorage() const { return !hasLocalStorage(); } |
1093 | |
1094 | /// Get the storage duration of this variable, per C++ [basic.stc]. |
1095 | StorageDuration getStorageDuration() const { |
1096 | return hasLocalStorage() ? SD_Automatic : |
1097 | getTSCSpec() ? SD_Thread : SD_Static; |
1098 | } |
1099 | |
1100 | /// Compute the language linkage. |
1101 | LanguageLinkage getLanguageLinkage() const; |
1102 | |
1103 | /// Determines whether this variable is a variable with external, C linkage. |
1104 | bool isExternC() const; |
1105 | |
1106 | /// Determines whether this variable's context is, or is nested within, |
1107 | /// a C++ extern "C" linkage spec. |
1108 | bool isInExternCContext() const; |
1109 | |
1110 | /// Determines whether this variable's context is, or is nested within, |
1111 | /// a C++ extern "C++" linkage spec. |
1112 | bool isInExternCXXContext() const; |
1113 | |
1114 | /// Returns true for local variable declarations other than parameters. |
1115 | /// Note that this includes static variables inside of functions. It also |
1116 | /// includes variables inside blocks. |
1117 | /// |
1118 | /// void foo() { int x; static int y; extern int z; } |
1119 | bool isLocalVarDecl() const { |
1120 | if (getKind() != Decl::Var && getKind() != Decl::Decomposition) |
1121 | return false; |
1122 | if (const DeclContext *DC = getLexicalDeclContext()) |
1123 | return DC->getRedeclContext()->isFunctionOrMethod(); |
1124 | return false; |
1125 | } |
1126 | |
1127 | /// Similar to isLocalVarDecl but also includes parameters. |
1128 | bool isLocalVarDeclOrParm() const { |
1129 | return isLocalVarDecl() || getKind() == Decl::ParmVar; |
1130 | } |
1131 | |
1132 | /// Similar to isLocalVarDecl, but excludes variables declared in blocks. |
1133 | bool isFunctionOrMethodVarDecl() const { |
1134 | if (getKind() != Decl::Var && getKind() != Decl::Decomposition) |
1135 | return false; |
1136 | const DeclContext *DC = getLexicalDeclContext()->getRedeclContext(); |
1137 | return DC->isFunctionOrMethod() && DC->getDeclKind() != Decl::Block; |
1138 | } |
1139 | |
1140 | /// Determines whether this is a static data member. |
1141 | /// |
1142 | /// This will only be true in C++, and applies to, e.g., the |
1143 | /// variable 'x' in: |
1144 | /// \code |
1145 | /// struct S { |
1146 | /// static int x; |
1147 | /// }; |
1148 | /// \endcode |
1149 | bool isStaticDataMember() const { |
1150 | // If it wasn't static, it would be a FieldDecl. |
1151 | return getKind() != Decl::ParmVar && getDeclContext()->isRecord(); |
1152 | } |
1153 | |
1154 | VarDecl *getCanonicalDecl() override; |
1155 | const VarDecl *getCanonicalDecl() const { |
1156 | return const_cast<VarDecl*>(this)->getCanonicalDecl(); |
1157 | } |
1158 | |
1159 | enum DefinitionKind { |
1160 | /// This declaration is only a declaration. |
1161 | DeclarationOnly, |
1162 | |
1163 | /// This declaration is a tentative definition. |
1164 | TentativeDefinition, |
1165 | |
1166 | /// This declaration is definitely a definition. |
1167 | Definition |
1168 | }; |
1169 | |
1170 | /// Check whether this declaration is a definition. If this could be |
1171 | /// a tentative definition (in C), don't check whether there's an overriding |
1172 | /// definition. |
1173 | DefinitionKind isThisDeclarationADefinition(ASTContext &) const; |
1174 | DefinitionKind isThisDeclarationADefinition() const { |
1175 | return isThisDeclarationADefinition(getASTContext()); |
1176 | } |
1177 | |
1178 | /// Check whether this variable is defined in this translation unit. |
1179 | DefinitionKind hasDefinition(ASTContext &) const; |
1180 | DefinitionKind hasDefinition() const { |
1181 | return hasDefinition(getASTContext()); |
1182 | } |
1183 | |
1184 | /// Get the tentative definition that acts as the real definition in a TU. |
1185 | /// Returns null if there is a proper definition available. |
1186 | VarDecl *getActingDefinition(); |
1187 | const VarDecl *getActingDefinition() const { |
1188 | return const_cast<VarDecl*>(this)->getActingDefinition(); |
1189 | } |
1190 | |
1191 | /// Get the real (not just tentative) definition for this declaration. |
1192 | VarDecl *getDefinition(ASTContext &); |
1193 | const VarDecl *getDefinition(ASTContext &C) const { |
1194 | return const_cast<VarDecl*>(this)->getDefinition(C); |
1195 | } |
1196 | VarDecl *getDefinition() { |
1197 | return getDefinition(getASTContext()); |
1198 | } |
1199 | const VarDecl *getDefinition() const { |
1200 | return const_cast<VarDecl*>(this)->getDefinition(); |
1201 | } |
1202 | |
1203 | /// Determine whether this is or was instantiated from an out-of-line |
1204 | /// definition of a static data member. |
1205 | bool isOutOfLine() const override; |
1206 | |
1207 | /// Returns true for file scoped variable declaration. |
1208 | bool isFileVarDecl() const { |
1209 | Kind K = getKind(); |
1210 | if (K == ParmVar || K == ImplicitParam) |
1211 | return false; |
1212 | |
1213 | if (getLexicalDeclContext()->getRedeclContext()->isFileContext()) |
1214 | return true; |
1215 | |
1216 | if (isStaticDataMember()) |
1217 | return true; |
1218 | |
1219 | return false; |
1220 | } |
1221 | |
1222 | /// Get the initializer for this variable, no matter which |
1223 | /// declaration it is attached to. |
1224 | const Expr *getAnyInitializer() const { |
1225 | const VarDecl *D; |
1226 | return getAnyInitializer(D); |
1227 | } |
1228 | |
1229 | /// Get the initializer for this variable, no matter which |
1230 | /// declaration it is attached to. Also get that declaration. |
1231 | const Expr *getAnyInitializer(const VarDecl *&D) const; |
1232 | |
1233 | bool hasInit() const; |
1234 | const Expr *getInit() const { |
1235 | return const_cast<VarDecl *>(this)->getInit(); |
1236 | } |
1237 | Expr *getInit(); |
1238 | |
1239 | /// Retrieve the address of the initializer expression. |
1240 | Stmt **getInitAddress(); |
1241 | |
1242 | void setInit(Expr *I); |
1243 | |
1244 | /// Get the initializing declaration of this variable, if any. This is |
1245 | /// usually the definition, except that for a static data member it can be |
1246 | /// the in-class declaration. |
1247 | VarDecl *getInitializingDeclaration(); |
1248 | const VarDecl *getInitializingDeclaration() const { |
1249 | return const_cast<VarDecl *>(this)->getInitializingDeclaration(); |
1250 | } |
1251 | |
1252 | /// Determine whether this variable's value might be usable in a |
1253 | /// constant expression, according to the relevant language standard. |
1254 | /// This only checks properties of the declaration, and does not check |
1255 | /// whether the initializer is in fact a constant expression. |
1256 | bool mightBeUsableInConstantExpressions(ASTContext &C) const; |
1257 | |
1258 | /// Determine whether this variable's value can be used in a |
1259 | /// constant expression, according to the relevant language standard, |
1260 | /// including checking whether it was initialized by a constant expression. |
1261 | bool isUsableInConstantExpressions(ASTContext &C) const; |
1262 | |
1263 | EvaluatedStmt *ensureEvaluatedStmt() const; |
1264 | |
1265 | /// Attempt to evaluate the value of the initializer attached to this |
1266 | /// declaration, and produce notes explaining why it cannot be evaluated or is |
1267 | /// not a constant expression. Returns a pointer to the value if evaluation |
1268 | /// succeeded, 0 otherwise. |
1269 | APValue *evaluateValue() const; |
1270 | APValue *evaluateValue(SmallVectorImpl<PartialDiagnosticAt> &Notes) const; |
1271 | |
1272 | /// Return the already-evaluated value of this variable's |
1273 | /// initializer, or NULL if the value is not yet known. Returns pointer |
1274 | /// to untyped APValue if the value could not be evaluated. |
1275 | APValue *getEvaluatedValue() const; |
1276 | |
1277 | /// Evaluate the destruction of this variable to determine if it constitutes |
1278 | /// constant destruction. |
1279 | /// |
1280 | /// \pre isInitICE() |
1281 | /// \return \c true if this variable has constant destruction, \c false if |
1282 | /// not. |
1283 | bool evaluateDestruction(SmallVectorImpl<PartialDiagnosticAt> &Notes) const; |
1284 | |
1285 | /// Determines whether it is already known whether the |
1286 | /// initializer is an integral constant expression or not. |
1287 | bool isInitKnownICE() const; |
1288 | |
1289 | /// Determines whether the initializer is an integral constant |
1290 | /// expression, or in C++11, whether the initializer is a constant |
1291 | /// expression. |
1292 | /// |
1293 | /// \pre isInitKnownICE() |
1294 | bool isInitICE() const; |
1295 | |
1296 | /// Determine whether the value of the initializer attached to this |
1297 | /// declaration is an integral constant expression. |
1298 | bool checkInitIsICE() const; |
1299 | |
1300 | void setInitStyle(InitializationStyle Style) { |
1301 | VarDeclBits.InitStyle = Style; |
1302 | } |
1303 | |
1304 | /// The style of initialization for this declaration. |
1305 | /// |
1306 | /// C-style initialization is "int x = 1;". Call-style initialization is |
1307 | /// a C++98 direct-initializer, e.g. "int x(1);". The Init expression will be |
1308 | /// the expression inside the parens or a "ClassType(a,b,c)" class constructor |
1309 | /// expression for class types. List-style initialization is C++11 syntax, |
1310 | /// e.g. "int x{1};". Clients can distinguish between different forms of |
1311 | /// initialization by checking this value. In particular, "int x = {1};" is |
1312 | /// C-style, "int x({1})" is call-style, and "int x{1};" is list-style; the |
1313 | /// Init expression in all three cases is an InitListExpr. |
1314 | InitializationStyle getInitStyle() const { |
1315 | return static_cast<InitializationStyle>(VarDeclBits.InitStyle); |
1316 | } |
1317 | |
1318 | /// Whether the initializer is a direct-initializer (list or call). |
1319 | bool isDirectInit() const { |
1320 | return getInitStyle() != CInit; |
1321 | } |
1322 | |
1323 | /// If this definition should pretend to be a declaration. |
1324 | bool isThisDeclarationADemotedDefinition() const { |
1325 | return isa<ParmVarDecl>(this) ? false : |
1326 | NonParmVarDeclBits.IsThisDeclarationADemotedDefinition; |
1327 | } |
1328 | |
1329 | /// This is a definition which should be demoted to a declaration. |
1330 | /// |
1331 | /// In some cases (mostly module merging) we can end up with two visible |
1332 | /// definitions one of which needs to be demoted to a declaration to keep |
1333 | /// the AST invariants. |
1334 | void demoteThisDefinitionToDeclaration() { |
1335 | assert(isThisDeclarationADefinition() && "Not a definition!")((isThisDeclarationADefinition() && "Not a definition!" ) ? static_cast<void> (0) : __assert_fail ("isThisDeclarationADefinition() && \"Not a definition!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1335, __PRETTY_FUNCTION__)); |
1336 | assert(!isa<ParmVarDecl>(this) && "Cannot demote ParmVarDecls!")((!isa<ParmVarDecl>(this) && "Cannot demote ParmVarDecls!" ) ? static_cast<void> (0) : __assert_fail ("!isa<ParmVarDecl>(this) && \"Cannot demote ParmVarDecls!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1336, __PRETTY_FUNCTION__)); |
1337 | NonParmVarDeclBits.IsThisDeclarationADemotedDefinition = 1; |
1338 | } |
1339 | |
1340 | /// Determine whether this variable is the exception variable in a |
1341 | /// C++ catch statememt or an Objective-C \@catch statement. |
1342 | bool isExceptionVariable() const { |
1343 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.ExceptionVar; |
1344 | } |
1345 | void setExceptionVariable(bool EV) { |
1346 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1346, __PRETTY_FUNCTION__)); |
1347 | NonParmVarDeclBits.ExceptionVar = EV; |
1348 | } |
1349 | |
1350 | /// Determine whether this local variable can be used with the named |
1351 | /// return value optimization (NRVO). |
1352 | /// |
1353 | /// The named return value optimization (NRVO) works by marking certain |
1354 | /// non-volatile local variables of class type as NRVO objects. These |
1355 | /// locals can be allocated within the return slot of their containing |
1356 | /// function, in which case there is no need to copy the object to the |
1357 | /// return slot when returning from the function. Within the function body, |
1358 | /// each return that returns the NRVO object will have this variable as its |
1359 | /// NRVO candidate. |
1360 | bool isNRVOVariable() const { |
1361 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.NRVOVariable; |
1362 | } |
1363 | void setNRVOVariable(bool NRVO) { |
1364 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1364, __PRETTY_FUNCTION__)); |
1365 | NonParmVarDeclBits.NRVOVariable = NRVO; |
1366 | } |
1367 | |
1368 | /// Determine whether this variable is the for-range-declaration in |
1369 | /// a C++0x for-range statement. |
1370 | bool isCXXForRangeDecl() const { |
1371 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.CXXForRangeDecl; |
1372 | } |
1373 | void setCXXForRangeDecl(bool FRD) { |
1374 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1374, __PRETTY_FUNCTION__)); |
1375 | NonParmVarDeclBits.CXXForRangeDecl = FRD; |
1376 | } |
1377 | |
1378 | /// Determine whether this variable is a for-loop declaration for a |
1379 | /// for-in statement in Objective-C. |
1380 | bool isObjCForDecl() const { |
1381 | return NonParmVarDeclBits.ObjCForDecl; |
1382 | } |
1383 | |
1384 | void setObjCForDecl(bool FRD) { |
1385 | NonParmVarDeclBits.ObjCForDecl = FRD; |
1386 | } |
1387 | |
1388 | /// Determine whether this variable is an ARC pseudo-__strong variable. A |
1389 | /// pseudo-__strong variable has a __strong-qualified type but does not |
1390 | /// actually retain the object written into it. Generally such variables are |
1391 | /// also 'const' for safety. There are 3 cases where this will be set, 1) if |
1392 | /// the variable is annotated with the objc_externally_retained attribute, 2) |
1393 | /// if its 'self' in a non-init method, or 3) if its the variable in an for-in |
1394 | /// loop. |
1395 | bool isARCPseudoStrong() const { return VarDeclBits.ARCPseudoStrong; } |
1396 | void setARCPseudoStrong(bool PS) { VarDeclBits.ARCPseudoStrong = PS; } |
1397 | |
1398 | /// Whether this variable is (C++1z) inline. |
1399 | bool isInline() const { |
1400 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsInline; |
1401 | } |
1402 | bool isInlineSpecified() const { |
1403 | return isa<ParmVarDecl>(this) ? false |
1404 | : NonParmVarDeclBits.IsInlineSpecified; |
1405 | } |
1406 | void setInlineSpecified() { |
1407 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1407, __PRETTY_FUNCTION__)); |
1408 | NonParmVarDeclBits.IsInline = true; |
1409 | NonParmVarDeclBits.IsInlineSpecified = true; |
1410 | } |
1411 | void setImplicitlyInline() { |
1412 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1412, __PRETTY_FUNCTION__)); |
1413 | NonParmVarDeclBits.IsInline = true; |
1414 | } |
1415 | |
1416 | /// Whether this variable is (C++11) constexpr. |
1417 | bool isConstexpr() const { |
1418 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsConstexpr; |
1419 | } |
1420 | void setConstexpr(bool IC) { |
1421 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1421, __PRETTY_FUNCTION__)); |
1422 | NonParmVarDeclBits.IsConstexpr = IC; |
1423 | } |
1424 | |
1425 | /// Whether this variable is the implicit variable for a lambda init-capture. |
1426 | bool isInitCapture() const { |
1427 | return isa<ParmVarDecl>(this) ? false : NonParmVarDeclBits.IsInitCapture; |
1428 | } |
1429 | void setInitCapture(bool IC) { |
1430 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1430, __PRETTY_FUNCTION__)); |
1431 | NonParmVarDeclBits.IsInitCapture = IC; |
1432 | } |
1433 | |
1434 | /// Determine whether this variable is actually a function parameter pack or |
1435 | /// init-capture pack. |
1436 | bool isParameterPack() const; |
1437 | |
1438 | /// Whether this local extern variable declaration's previous declaration |
1439 | /// was declared in the same block scope. Only correct in C++. |
1440 | bool isPreviousDeclInSameBlockScope() const { |
1441 | return isa<ParmVarDecl>(this) |
1442 | ? false |
1443 | : NonParmVarDeclBits.PreviousDeclInSameBlockScope; |
1444 | } |
1445 | void setPreviousDeclInSameBlockScope(bool Same) { |
1446 | assert(!isa<ParmVarDecl>(this))((!isa<ParmVarDecl>(this)) ? static_cast<void> (0 ) : __assert_fail ("!isa<ParmVarDecl>(this)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1446, __PRETTY_FUNCTION__)); |
1447 | NonParmVarDeclBits.PreviousDeclInSameBlockScope = Same; |
1448 | } |
1449 | |
1450 | /// Indicates the capture is a __block variable that is captured by a block |
1451 | /// that can potentially escape (a block for which BlockDecl::doesNotEscape |
1452 | /// returns false). |
1453 | bool isEscapingByref() const; |
1454 | |
1455 | /// Indicates the capture is a __block variable that is never captured by an |
1456 | /// escaping block. |
1457 | bool isNonEscapingByref() const; |
1458 | |
1459 | void setEscapingByref() { |
1460 | NonParmVarDeclBits.EscapingByref = true; |
1461 | } |
1462 | |
1463 | /// Retrieve the variable declaration from which this variable could |
1464 | /// be instantiated, if it is an instantiation (rather than a non-template). |
1465 | VarDecl *getTemplateInstantiationPattern() const; |
1466 | |
1467 | /// If this variable is an instantiated static data member of a |
1468 | /// class template specialization, returns the templated static data member |
1469 | /// from which it was instantiated. |
1470 | VarDecl *getInstantiatedFromStaticDataMember() const; |
1471 | |
1472 | /// If this variable is an instantiation of a variable template or a |
1473 | /// static data member of a class template, determine what kind of |
1474 | /// template specialization or instantiation this is. |
1475 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
1476 | |
1477 | /// Get the template specialization kind of this variable for the purposes of |
1478 | /// template instantiation. This differs from getTemplateSpecializationKind() |
1479 | /// for an instantiation of a class-scope explicit specialization. |
1480 | TemplateSpecializationKind |
1481 | getTemplateSpecializationKindForInstantiation() const; |
1482 | |
1483 | /// If this variable is an instantiation of a variable template or a |
1484 | /// static data member of a class template, determine its point of |
1485 | /// instantiation. |
1486 | SourceLocation getPointOfInstantiation() const; |
1487 | |
1488 | /// If this variable is an instantiation of a static data member of a |
1489 | /// class template specialization, retrieves the member specialization |
1490 | /// information. |
1491 | MemberSpecializationInfo *getMemberSpecializationInfo() const; |
1492 | |
1493 | /// For a static data member that was instantiated from a static |
1494 | /// data member of a class template, set the template specialiation kind. |
1495 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK, |
1496 | SourceLocation PointOfInstantiation = SourceLocation()); |
1497 | |
1498 | /// Specify that this variable is an instantiation of the |
1499 | /// static data member VD. |
1500 | void setInstantiationOfStaticDataMember(VarDecl *VD, |
1501 | TemplateSpecializationKind TSK); |
1502 | |
1503 | /// Retrieves the variable template that is described by this |
1504 | /// variable declaration. |
1505 | /// |
1506 | /// Every variable template is represented as a VarTemplateDecl and a |
1507 | /// VarDecl. The former contains template properties (such as |
1508 | /// the template parameter lists) while the latter contains the |
1509 | /// actual description of the template's |
1510 | /// contents. VarTemplateDecl::getTemplatedDecl() retrieves the |
1511 | /// VarDecl that from a VarTemplateDecl, while |
1512 | /// getDescribedVarTemplate() retrieves the VarTemplateDecl from |
1513 | /// a VarDecl. |
1514 | VarTemplateDecl *getDescribedVarTemplate() const; |
1515 | |
1516 | void setDescribedVarTemplate(VarTemplateDecl *Template); |
1517 | |
1518 | // Is this variable known to have a definition somewhere in the complete |
1519 | // program? This may be true even if the declaration has internal linkage and |
1520 | // has no definition within this source file. |
1521 | bool isKnownToBeDefined() const; |
1522 | |
1523 | /// Is destruction of this variable entirely suppressed? If so, the variable |
1524 | /// need not have a usable destructor at all. |
1525 | bool isNoDestroy(const ASTContext &) const; |
1526 | |
1527 | /// Do we need to emit an exit-time destructor for this variable, and if so, |
1528 | /// what kind? |
1529 | QualType::DestructionKind needsDestruction(const ASTContext &Ctx) const; |
1530 | |
1531 | // Implement isa/cast/dyncast/etc. |
1532 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1533 | static bool classofKind(Kind K) { return K >= firstVar && K <= lastVar; } |
1534 | }; |
1535 | |
1536 | class ImplicitParamDecl : public VarDecl { |
1537 | void anchor() override; |
1538 | |
1539 | public: |
1540 | /// Defines the kind of the implicit parameter: is this an implicit parameter |
1541 | /// with pointer to 'this', 'self', '_cmd', virtual table pointers, captured |
1542 | /// context or something else. |
1543 | enum ImplicitParamKind : unsigned { |
1544 | /// Parameter for Objective-C 'self' argument |
1545 | ObjCSelf, |
1546 | |
1547 | /// Parameter for Objective-C '_cmd' argument |
1548 | ObjCCmd, |
1549 | |
1550 | /// Parameter for C++ 'this' argument |
1551 | CXXThis, |
1552 | |
1553 | /// Parameter for C++ virtual table pointers |
1554 | CXXVTT, |
1555 | |
1556 | /// Parameter for captured context |
1557 | CapturedContext, |
1558 | |
1559 | /// Other implicit parameter |
1560 | Other, |
1561 | }; |
1562 | |
1563 | /// Create implicit parameter. |
1564 | static ImplicitParamDecl *Create(ASTContext &C, DeclContext *DC, |
1565 | SourceLocation IdLoc, IdentifierInfo *Id, |
1566 | QualType T, ImplicitParamKind ParamKind); |
1567 | static ImplicitParamDecl *Create(ASTContext &C, QualType T, |
1568 | ImplicitParamKind ParamKind); |
1569 | |
1570 | static ImplicitParamDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1571 | |
1572 | ImplicitParamDecl(ASTContext &C, DeclContext *DC, SourceLocation IdLoc, |
1573 | IdentifierInfo *Id, QualType Type, |
1574 | ImplicitParamKind ParamKind) |
1575 | : VarDecl(ImplicitParam, C, DC, IdLoc, IdLoc, Id, Type, |
1576 | /*TInfo=*/nullptr, SC_None) { |
1577 | NonParmVarDeclBits.ImplicitParamKind = ParamKind; |
1578 | setImplicit(); |
1579 | } |
1580 | |
1581 | ImplicitParamDecl(ASTContext &C, QualType Type, ImplicitParamKind ParamKind) |
1582 | : VarDecl(ImplicitParam, C, /*DC=*/nullptr, SourceLocation(), |
1583 | SourceLocation(), /*Id=*/nullptr, Type, |
1584 | /*TInfo=*/nullptr, SC_None) { |
1585 | NonParmVarDeclBits.ImplicitParamKind = ParamKind; |
1586 | setImplicit(); |
1587 | } |
1588 | |
1589 | /// Returns the implicit parameter kind. |
1590 | ImplicitParamKind getParameterKind() const { |
1591 | return static_cast<ImplicitParamKind>(NonParmVarDeclBits.ImplicitParamKind); |
1592 | } |
1593 | |
1594 | // Implement isa/cast/dyncast/etc. |
1595 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1596 | static bool classofKind(Kind K) { return K == ImplicitParam; } |
1597 | }; |
1598 | |
1599 | /// Represents a parameter to a function. |
1600 | class ParmVarDecl : public VarDecl { |
1601 | public: |
1602 | enum { MaxFunctionScopeDepth = 255 }; |
1603 | enum { MaxFunctionScopeIndex = 255 }; |
1604 | |
1605 | protected: |
1606 | ParmVarDecl(Kind DK, ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1607 | SourceLocation IdLoc, IdentifierInfo *Id, QualType T, |
1608 | TypeSourceInfo *TInfo, StorageClass S, Expr *DefArg) |
1609 | : VarDecl(DK, C, DC, StartLoc, IdLoc, Id, T, TInfo, S) { |
1610 | assert(ParmVarDeclBits.HasInheritedDefaultArg == false)((ParmVarDeclBits.HasInheritedDefaultArg == false) ? static_cast <void> (0) : __assert_fail ("ParmVarDeclBits.HasInheritedDefaultArg == false" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1610, __PRETTY_FUNCTION__)); |
1611 | assert(ParmVarDeclBits.DefaultArgKind == DAK_None)((ParmVarDeclBits.DefaultArgKind == DAK_None) ? static_cast< void> (0) : __assert_fail ("ParmVarDeclBits.DefaultArgKind == DAK_None" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1611, __PRETTY_FUNCTION__)); |
1612 | assert(ParmVarDeclBits.IsKNRPromoted == false)((ParmVarDeclBits.IsKNRPromoted == false) ? static_cast<void > (0) : __assert_fail ("ParmVarDeclBits.IsKNRPromoted == false" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1612, __PRETTY_FUNCTION__)); |
1613 | assert(ParmVarDeclBits.IsObjCMethodParam == false)((ParmVarDeclBits.IsObjCMethodParam == false) ? static_cast< void> (0) : __assert_fail ("ParmVarDeclBits.IsObjCMethodParam == false" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1613, __PRETTY_FUNCTION__)); |
1614 | setDefaultArg(DefArg); |
1615 | } |
1616 | |
1617 | public: |
1618 | static ParmVarDecl *Create(ASTContext &C, DeclContext *DC, |
1619 | SourceLocation StartLoc, |
1620 | SourceLocation IdLoc, IdentifierInfo *Id, |
1621 | QualType T, TypeSourceInfo *TInfo, |
1622 | StorageClass S, Expr *DefArg); |
1623 | |
1624 | static ParmVarDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1625 | |
1626 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
1627 | |
1628 | void setObjCMethodScopeInfo(unsigned parameterIndex) { |
1629 | ParmVarDeclBits.IsObjCMethodParam = true; |
1630 | setParameterIndex(parameterIndex); |
1631 | } |
1632 | |
1633 | void setScopeInfo(unsigned scopeDepth, unsigned parameterIndex) { |
1634 | assert(!ParmVarDeclBits.IsObjCMethodParam)((!ParmVarDeclBits.IsObjCMethodParam) ? static_cast<void> (0) : __assert_fail ("!ParmVarDeclBits.IsObjCMethodParam", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1634, __PRETTY_FUNCTION__)); |
1635 | |
1636 | ParmVarDeclBits.ScopeDepthOrObjCQuals = scopeDepth; |
1637 | assert(ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth((ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth && "truncation!") ? static_cast<void> (0) : __assert_fail ("ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth && \"truncation!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1638, __PRETTY_FUNCTION__)) |
1638 | && "truncation!")((ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth && "truncation!") ? static_cast<void> (0) : __assert_fail ("ParmVarDeclBits.ScopeDepthOrObjCQuals == scopeDepth && \"truncation!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1638, __PRETTY_FUNCTION__)); |
1639 | |
1640 | setParameterIndex(parameterIndex); |
1641 | } |
1642 | |
1643 | bool isObjCMethodParameter() const { |
1644 | return ParmVarDeclBits.IsObjCMethodParam; |
1645 | } |
1646 | |
1647 | unsigned getFunctionScopeDepth() const { |
1648 | if (ParmVarDeclBits.IsObjCMethodParam) return 0; |
1649 | return ParmVarDeclBits.ScopeDepthOrObjCQuals; |
1650 | } |
1651 | |
1652 | /// Returns the index of this parameter in its prototype or method scope. |
1653 | unsigned getFunctionScopeIndex() const { |
1654 | return getParameterIndex(); |
1655 | } |
1656 | |
1657 | ObjCDeclQualifier getObjCDeclQualifier() const { |
1658 | if (!ParmVarDeclBits.IsObjCMethodParam) return OBJC_TQ_None; |
1659 | return ObjCDeclQualifier(ParmVarDeclBits.ScopeDepthOrObjCQuals); |
1660 | } |
1661 | void setObjCDeclQualifier(ObjCDeclQualifier QTVal) { |
1662 | assert(ParmVarDeclBits.IsObjCMethodParam)((ParmVarDeclBits.IsObjCMethodParam) ? static_cast<void> (0) : __assert_fail ("ParmVarDeclBits.IsObjCMethodParam", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1662, __PRETTY_FUNCTION__)); |
1663 | ParmVarDeclBits.ScopeDepthOrObjCQuals = QTVal; |
1664 | } |
1665 | |
1666 | /// True if the value passed to this parameter must undergo |
1667 | /// K&R-style default argument promotion: |
1668 | /// |
1669 | /// C99 6.5.2.2. |
1670 | /// If the expression that denotes the called function has a type |
1671 | /// that does not include a prototype, the integer promotions are |
1672 | /// performed on each argument, and arguments that have type float |
1673 | /// are promoted to double. |
1674 | bool isKNRPromoted() const { |
1675 | return ParmVarDeclBits.IsKNRPromoted; |
1676 | } |
1677 | void setKNRPromoted(bool promoted) { |
1678 | ParmVarDeclBits.IsKNRPromoted = promoted; |
1679 | } |
1680 | |
1681 | Expr *getDefaultArg(); |
1682 | const Expr *getDefaultArg() const { |
1683 | return const_cast<ParmVarDecl *>(this)->getDefaultArg(); |
1684 | } |
1685 | |
1686 | void setDefaultArg(Expr *defarg); |
1687 | |
1688 | /// Retrieve the source range that covers the entire default |
1689 | /// argument. |
1690 | SourceRange getDefaultArgRange() const; |
1691 | void setUninstantiatedDefaultArg(Expr *arg); |
1692 | Expr *getUninstantiatedDefaultArg(); |
1693 | const Expr *getUninstantiatedDefaultArg() const { |
1694 | return const_cast<ParmVarDecl *>(this)->getUninstantiatedDefaultArg(); |
1695 | } |
1696 | |
1697 | /// Determines whether this parameter has a default argument, |
1698 | /// either parsed or not. |
1699 | bool hasDefaultArg() const; |
1700 | |
1701 | /// Determines whether this parameter has a default argument that has not |
1702 | /// yet been parsed. This will occur during the processing of a C++ class |
1703 | /// whose member functions have default arguments, e.g., |
1704 | /// @code |
1705 | /// class X { |
1706 | /// public: |
1707 | /// void f(int x = 17); // x has an unparsed default argument now |
1708 | /// }; // x has a regular default argument now |
1709 | /// @endcode |
1710 | bool hasUnparsedDefaultArg() const { |
1711 | return ParmVarDeclBits.DefaultArgKind == DAK_Unparsed; |
1712 | } |
1713 | |
1714 | bool hasUninstantiatedDefaultArg() const { |
1715 | return ParmVarDeclBits.DefaultArgKind == DAK_Uninstantiated; |
1716 | } |
1717 | |
1718 | /// Specify that this parameter has an unparsed default argument. |
1719 | /// The argument will be replaced with a real default argument via |
1720 | /// setDefaultArg when the class definition enclosing the function |
1721 | /// declaration that owns this default argument is completed. |
1722 | void setUnparsedDefaultArg() { |
1723 | ParmVarDeclBits.DefaultArgKind = DAK_Unparsed; |
1724 | } |
1725 | |
1726 | bool hasInheritedDefaultArg() const { |
1727 | return ParmVarDeclBits.HasInheritedDefaultArg; |
1728 | } |
1729 | |
1730 | void setHasInheritedDefaultArg(bool I = true) { |
1731 | ParmVarDeclBits.HasInheritedDefaultArg = I; |
1732 | } |
1733 | |
1734 | QualType getOriginalType() const; |
1735 | |
1736 | /// Sets the function declaration that owns this |
1737 | /// ParmVarDecl. Since ParmVarDecls are often created before the |
1738 | /// FunctionDecls that own them, this routine is required to update |
1739 | /// the DeclContext appropriately. |
1740 | void setOwningFunction(DeclContext *FD) { setDeclContext(FD); } |
1741 | |
1742 | // Implement isa/cast/dyncast/etc. |
1743 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
1744 | static bool classofKind(Kind K) { return K == ParmVar; } |
1745 | |
1746 | private: |
1747 | enum { ParameterIndexSentinel = (1 << NumParameterIndexBits) - 1 }; |
1748 | |
1749 | void setParameterIndex(unsigned parameterIndex) { |
1750 | if (parameterIndex >= ParameterIndexSentinel) { |
1751 | setParameterIndexLarge(parameterIndex); |
1752 | return; |
1753 | } |
1754 | |
1755 | ParmVarDeclBits.ParameterIndex = parameterIndex; |
1756 | assert(ParmVarDeclBits.ParameterIndex == parameterIndex && "truncation!")((ParmVarDeclBits.ParameterIndex == parameterIndex && "truncation!") ? static_cast<void> (0) : __assert_fail ("ParmVarDeclBits.ParameterIndex == parameterIndex && \"truncation!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 1756, __PRETTY_FUNCTION__)); |
1757 | } |
1758 | unsigned getParameterIndex() const { |
1759 | unsigned d = ParmVarDeclBits.ParameterIndex; |
1760 | return d == ParameterIndexSentinel ? getParameterIndexLarge() : d; |
1761 | } |
1762 | |
1763 | void setParameterIndexLarge(unsigned parameterIndex); |
1764 | unsigned getParameterIndexLarge() const; |
1765 | }; |
1766 | |
1767 | enum class MultiVersionKind { |
1768 | None, |
1769 | Target, |
1770 | CPUSpecific, |
1771 | CPUDispatch |
1772 | }; |
1773 | |
1774 | /// Represents a function declaration or definition. |
1775 | /// |
1776 | /// Since a given function can be declared several times in a program, |
1777 | /// there may be several FunctionDecls that correspond to that |
1778 | /// function. Only one of those FunctionDecls will be found when |
1779 | /// traversing the list of declarations in the context of the |
1780 | /// FunctionDecl (e.g., the translation unit); this FunctionDecl |
1781 | /// contains all of the information known about the function. Other, |
1782 | /// previous declarations of the function are available via the |
1783 | /// getPreviousDecl() chain. |
1784 | class FunctionDecl : public DeclaratorDecl, |
1785 | public DeclContext, |
1786 | public Redeclarable<FunctionDecl> { |
1787 | // This class stores some data in DeclContext::FunctionDeclBits |
1788 | // to save some space. Use the provided accessors to access it. |
1789 | public: |
1790 | /// The kind of templated function a FunctionDecl can be. |
1791 | enum TemplatedKind { |
1792 | // Not templated. |
1793 | TK_NonTemplate, |
1794 | // The pattern in a function template declaration. |
1795 | TK_FunctionTemplate, |
1796 | // A non-template function that is an instantiation or explicit |
1797 | // specialization of a member of a templated class. |
1798 | TK_MemberSpecialization, |
1799 | // An instantiation or explicit specialization of a function template. |
1800 | // Note: this might have been instantiated from a templated class if it |
1801 | // is a class-scope explicit specialization. |
1802 | TK_FunctionTemplateSpecialization, |
1803 | // A function template specialization that hasn't yet been resolved to a |
1804 | // particular specialized function template. |
1805 | TK_DependentFunctionTemplateSpecialization |
1806 | }; |
1807 | |
1808 | private: |
1809 | /// A new[]'d array of pointers to VarDecls for the formal |
1810 | /// parameters of this function. This is null if a prototype or if there are |
1811 | /// no formals. |
1812 | ParmVarDecl **ParamInfo = nullptr; |
1813 | |
1814 | LazyDeclStmtPtr Body; |
1815 | |
1816 | unsigned ODRHash; |
1817 | |
1818 | /// End part of this FunctionDecl's source range. |
1819 | /// |
1820 | /// We could compute the full range in getSourceRange(). However, when we're |
1821 | /// dealing with a function definition deserialized from a PCH/AST file, |
1822 | /// we can only compute the full range once the function body has been |
1823 | /// de-serialized, so it's far better to have the (sometimes-redundant) |
1824 | /// EndRangeLoc. |
1825 | SourceLocation EndRangeLoc; |
1826 | |
1827 | /// The template or declaration that this declaration |
1828 | /// describes or was instantiated from, respectively. |
1829 | /// |
1830 | /// For non-templates, this value will be NULL. For function |
1831 | /// declarations that describe a function template, this will be a |
1832 | /// pointer to a FunctionTemplateDecl. For member functions |
1833 | /// of class template specializations, this will be a MemberSpecializationInfo |
1834 | /// pointer containing information about the specialization. |
1835 | /// For function template specializations, this will be a |
1836 | /// FunctionTemplateSpecializationInfo, which contains information about |
1837 | /// the template being specialized and the template arguments involved in |
1838 | /// that specialization. |
1839 | llvm::PointerUnion4<FunctionTemplateDecl *, |
1840 | MemberSpecializationInfo *, |
1841 | FunctionTemplateSpecializationInfo *, |
1842 | DependentFunctionTemplateSpecializationInfo *> |
1843 | TemplateOrSpecialization; |
1844 | |
1845 | /// Provides source/type location info for the declaration name embedded in |
1846 | /// the DeclaratorDecl base class. |
1847 | DeclarationNameLoc DNLoc; |
1848 | |
1849 | /// Specify that this function declaration is actually a function |
1850 | /// template specialization. |
1851 | /// |
1852 | /// \param C the ASTContext. |
1853 | /// |
1854 | /// \param Template the function template that this function template |
1855 | /// specialization specializes. |
1856 | /// |
1857 | /// \param TemplateArgs the template arguments that produced this |
1858 | /// function template specialization from the template. |
1859 | /// |
1860 | /// \param InsertPos If non-NULL, the position in the function template |
1861 | /// specialization set where the function template specialization data will |
1862 | /// be inserted. |
1863 | /// |
1864 | /// \param TSK the kind of template specialization this is. |
1865 | /// |
1866 | /// \param TemplateArgsAsWritten location info of template arguments. |
1867 | /// |
1868 | /// \param PointOfInstantiation point at which the function template |
1869 | /// specialization was first instantiated. |
1870 | void setFunctionTemplateSpecialization(ASTContext &C, |
1871 | FunctionTemplateDecl *Template, |
1872 | const TemplateArgumentList *TemplateArgs, |
1873 | void *InsertPos, |
1874 | TemplateSpecializationKind TSK, |
1875 | const TemplateArgumentListInfo *TemplateArgsAsWritten, |
1876 | SourceLocation PointOfInstantiation); |
1877 | |
1878 | /// Specify that this record is an instantiation of the |
1879 | /// member function FD. |
1880 | void setInstantiationOfMemberFunction(ASTContext &C, FunctionDecl *FD, |
1881 | TemplateSpecializationKind TSK); |
1882 | |
1883 | void setParams(ASTContext &C, ArrayRef<ParmVarDecl *> NewParamInfo); |
1884 | |
1885 | // This is unfortunately needed because ASTDeclWriter::VisitFunctionDecl |
1886 | // need to access this bit but we want to avoid making ASTDeclWriter |
1887 | // a friend of FunctionDeclBitfields just for this. |
1888 | bool isDeletedBit() const { return FunctionDeclBits.IsDeleted; } |
1889 | |
1890 | /// Whether an ODRHash has been stored. |
1891 | bool hasODRHash() const { return FunctionDeclBits.HasODRHash; } |
1892 | |
1893 | /// State that an ODRHash has been stored. |
1894 | void setHasODRHash(bool B = true) { FunctionDeclBits.HasODRHash = B; } |
1895 | |
1896 | protected: |
1897 | FunctionDecl(Kind DK, ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1898 | const DeclarationNameInfo &NameInfo, QualType T, |
1899 | TypeSourceInfo *TInfo, StorageClass S, bool isInlineSpecified, |
1900 | ConstexprSpecKind ConstexprKind); |
1901 | |
1902 | using redeclarable_base = Redeclarable<FunctionDecl>; |
1903 | |
1904 | FunctionDecl *getNextRedeclarationImpl() override { |
1905 | return getNextRedeclaration(); |
1906 | } |
1907 | |
1908 | FunctionDecl *getPreviousDeclImpl() override { |
1909 | return getPreviousDecl(); |
1910 | } |
1911 | |
1912 | FunctionDecl *getMostRecentDeclImpl() override { |
1913 | return getMostRecentDecl(); |
1914 | } |
1915 | |
1916 | public: |
1917 | friend class ASTDeclReader; |
1918 | friend class ASTDeclWriter; |
1919 | |
1920 | using redecl_range = redeclarable_base::redecl_range; |
1921 | using redecl_iterator = redeclarable_base::redecl_iterator; |
1922 | |
1923 | using redeclarable_base::redecls_begin; |
1924 | using redeclarable_base::redecls_end; |
1925 | using redeclarable_base::redecls; |
1926 | using redeclarable_base::getPreviousDecl; |
1927 | using redeclarable_base::getMostRecentDecl; |
1928 | using redeclarable_base::isFirstDecl; |
1929 | |
1930 | static FunctionDecl * |
1931 | Create(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
1932 | SourceLocation NLoc, DeclarationName N, QualType T, |
1933 | TypeSourceInfo *TInfo, StorageClass SC, bool isInlineSpecified = false, |
1934 | bool hasWrittenPrototype = true, |
1935 | ConstexprSpecKind ConstexprKind = CSK_unspecified) { |
1936 | DeclarationNameInfo NameInfo(N, NLoc); |
1937 | return FunctionDecl::Create(C, DC, StartLoc, NameInfo, T, TInfo, SC, |
1938 | isInlineSpecified, hasWrittenPrototype, |
1939 | ConstexprKind); |
1940 | } |
1941 | |
1942 | static FunctionDecl *Create(ASTContext &C, DeclContext *DC, |
1943 | SourceLocation StartLoc, |
1944 | const DeclarationNameInfo &NameInfo, QualType T, |
1945 | TypeSourceInfo *TInfo, StorageClass SC, |
1946 | bool isInlineSpecified, bool hasWrittenPrototype, |
1947 | ConstexprSpecKind ConstexprKind); |
1948 | |
1949 | static FunctionDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
1950 | |
1951 | DeclarationNameInfo getNameInfo() const { |
1952 | return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc); |
1953 | } |
1954 | |
1955 | void getNameForDiagnostic(raw_ostream &OS, const PrintingPolicy &Policy, |
1956 | bool Qualified) const override; |
1957 | |
1958 | void setRangeEnd(SourceLocation E) { EndRangeLoc = E; } |
1959 | |
1960 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
1961 | |
1962 | // Function definitions. |
1963 | // |
1964 | // A function declaration may be: |
1965 | // - a non defining declaration, |
1966 | // - a definition. A function may be defined because: |
1967 | // - it has a body, or will have it in the case of late parsing. |
1968 | // - it has an uninstantiated body. The body does not exist because the |
1969 | // function is not used yet, but the declaration is considered a |
1970 | // definition and does not allow other definition of this function. |
1971 | // - it does not have a user specified body, but it does not allow |
1972 | // redefinition, because it is deleted/defaulted or is defined through |
1973 | // some other mechanism (alias, ifunc). |
1974 | |
1975 | /// Returns true if the function has a body. |
1976 | /// |
1977 | /// The function body might be in any of the (re-)declarations of this |
1978 | /// function. The variant that accepts a FunctionDecl pointer will set that |
1979 | /// function declaration to the actual declaration containing the body (if |
1980 | /// there is one). |
1981 | bool hasBody(const FunctionDecl *&Definition) const; |
1982 | |
1983 | bool hasBody() const override { |
1984 | const FunctionDecl* Definition; |
1985 | return hasBody(Definition); |
1986 | } |
1987 | |
1988 | /// Returns whether the function has a trivial body that does not require any |
1989 | /// specific codegen. |
1990 | bool hasTrivialBody() const; |
1991 | |
1992 | /// Returns true if the function has a definition that does not need to be |
1993 | /// instantiated. |
1994 | /// |
1995 | /// The variant that accepts a FunctionDecl pointer will set that function |
1996 | /// declaration to the declaration that is a definition (if there is one). |
1997 | bool isDefined(const FunctionDecl *&Definition) const; |
1998 | |
1999 | virtual bool isDefined() const { |
2000 | const FunctionDecl* Definition; |
2001 | return isDefined(Definition); |
2002 | } |
2003 | |
2004 | /// Get the definition for this declaration. |
2005 | FunctionDecl *getDefinition() { |
2006 | const FunctionDecl *Definition; |
2007 | if (isDefined(Definition)) |
2008 | return const_cast<FunctionDecl *>(Definition); |
2009 | return nullptr; |
2010 | } |
2011 | const FunctionDecl *getDefinition() const { |
2012 | return const_cast<FunctionDecl *>(this)->getDefinition(); |
2013 | } |
2014 | |
2015 | /// Retrieve the body (definition) of the function. The function body might be |
2016 | /// in any of the (re-)declarations of this function. The variant that accepts |
2017 | /// a FunctionDecl pointer will set that function declaration to the actual |
2018 | /// declaration containing the body (if there is one). |
2019 | /// NOTE: For checking if there is a body, use hasBody() instead, to avoid |
2020 | /// unnecessary AST de-serialization of the body. |
2021 | Stmt *getBody(const FunctionDecl *&Definition) const; |
2022 | |
2023 | Stmt *getBody() const override { |
2024 | const FunctionDecl* Definition; |
2025 | return getBody(Definition); |
2026 | } |
2027 | |
2028 | /// Returns whether this specific declaration of the function is also a |
2029 | /// definition that does not contain uninstantiated body. |
2030 | /// |
2031 | /// This does not determine whether the function has been defined (e.g., in a |
2032 | /// previous definition); for that information, use isDefined. |
2033 | bool isThisDeclarationADefinition() const { |
2034 | return isDeletedAsWritten() || isDefaulted() || Body || hasSkippedBody() || |
2035 | isLateTemplateParsed() || willHaveBody() || hasDefiningAttr(); |
2036 | } |
2037 | |
2038 | /// Returns whether this specific declaration of the function has a body. |
2039 | bool doesThisDeclarationHaveABody() const { |
2040 | return Body || isLateTemplateParsed(); |
2041 | } |
2042 | |
2043 | void setBody(Stmt *B); |
2044 | void setLazyBody(uint64_t Offset) { Body = Offset; } |
2045 | |
2046 | /// Whether this function is variadic. |
2047 | bool isVariadic() const; |
2048 | |
2049 | /// Whether this function is marked as virtual explicitly. |
2050 | bool isVirtualAsWritten() const { |
2051 | return FunctionDeclBits.IsVirtualAsWritten; |
2052 | } |
2053 | |
2054 | /// State that this function is marked as virtual explicitly. |
2055 | void setVirtualAsWritten(bool V) { FunctionDeclBits.IsVirtualAsWritten = V; } |
2056 | |
2057 | /// Whether this virtual function is pure, i.e. makes the containing class |
2058 | /// abstract. |
2059 | bool isPure() const { return FunctionDeclBits.IsPure; } |
2060 | void setPure(bool P = true); |
2061 | |
2062 | /// Whether this templated function will be late parsed. |
2063 | bool isLateTemplateParsed() const { |
2064 | return FunctionDeclBits.IsLateTemplateParsed; |
2065 | } |
2066 | |
2067 | /// State that this templated function will be late parsed. |
2068 | void setLateTemplateParsed(bool ILT = true) { |
2069 | FunctionDeclBits.IsLateTemplateParsed = ILT; |
2070 | } |
2071 | |
2072 | /// Whether this function is "trivial" in some specialized C++ senses. |
2073 | /// Can only be true for default constructors, copy constructors, |
2074 | /// copy assignment operators, and destructors. Not meaningful until |
2075 | /// the class has been fully built by Sema. |
2076 | bool isTrivial() const { return FunctionDeclBits.IsTrivial; } |
2077 | void setTrivial(bool IT) { FunctionDeclBits.IsTrivial = IT; } |
2078 | |
2079 | bool isTrivialForCall() const { return FunctionDeclBits.IsTrivialForCall; } |
2080 | void setTrivialForCall(bool IT) { FunctionDeclBits.IsTrivialForCall = IT; } |
2081 | |
2082 | /// Whether this function is defaulted per C++0x. Only valid for |
2083 | /// special member functions. |
2084 | bool isDefaulted() const { return FunctionDeclBits.IsDefaulted; } |
2085 | void setDefaulted(bool D = true) { FunctionDeclBits.IsDefaulted = D; } |
2086 | |
2087 | /// Whether this function is explicitly defaulted per C++0x. Only valid |
2088 | /// for special member functions. |
2089 | bool isExplicitlyDefaulted() const { |
2090 | return FunctionDeclBits.IsExplicitlyDefaulted; |
2091 | } |
2092 | |
2093 | /// State that this function is explicitly defaulted per C++0x. Only valid |
2094 | /// for special member functions. |
2095 | void setExplicitlyDefaulted(bool ED = true) { |
2096 | FunctionDeclBits.IsExplicitlyDefaulted = ED; |
2097 | } |
2098 | |
2099 | /// Whether falling off this function implicitly returns null/zero. |
2100 | /// If a more specific implicit return value is required, front-ends |
2101 | /// should synthesize the appropriate return statements. |
2102 | bool hasImplicitReturnZero() const { |
2103 | return FunctionDeclBits.HasImplicitReturnZero; |
2104 | } |
2105 | |
2106 | /// State that falling off this function implicitly returns null/zero. |
2107 | /// If a more specific implicit return value is required, front-ends |
2108 | /// should synthesize the appropriate return statements. |
2109 | void setHasImplicitReturnZero(bool IRZ) { |
2110 | FunctionDeclBits.HasImplicitReturnZero = IRZ; |
2111 | } |
2112 | |
2113 | /// Whether this function has a prototype, either because one |
2114 | /// was explicitly written or because it was "inherited" by merging |
2115 | /// a declaration without a prototype with a declaration that has a |
2116 | /// prototype. |
2117 | bool hasPrototype() const { |
2118 | return hasWrittenPrototype() || hasInheritedPrototype(); |
2119 | } |
2120 | |
2121 | /// Whether this function has a written prototype. |
2122 | bool hasWrittenPrototype() const { |
2123 | return FunctionDeclBits.HasWrittenPrototype; |
2124 | } |
2125 | |
2126 | /// State that this function has a written prototype. |
2127 | void setHasWrittenPrototype(bool P = true) { |
2128 | FunctionDeclBits.HasWrittenPrototype = P; |
2129 | } |
2130 | |
2131 | /// Whether this function inherited its prototype from a |
2132 | /// previous declaration. |
2133 | bool hasInheritedPrototype() const { |
2134 | return FunctionDeclBits.HasInheritedPrototype; |
2135 | } |
2136 | |
2137 | /// State that this function inherited its prototype from a |
2138 | /// previous declaration. |
2139 | void setHasInheritedPrototype(bool P = true) { |
2140 | FunctionDeclBits.HasInheritedPrototype = P; |
2141 | } |
2142 | |
2143 | /// Whether this is a (C++11) constexpr function or constexpr constructor. |
2144 | bool isConstexpr() const { |
2145 | return FunctionDeclBits.ConstexprKind != CSK_unspecified; |
2146 | } |
2147 | void setConstexprKind(ConstexprSpecKind CSK) { |
2148 | FunctionDeclBits.ConstexprKind = CSK; |
2149 | } |
2150 | ConstexprSpecKind getConstexprKind() const { |
2151 | return static_cast<ConstexprSpecKind>(FunctionDeclBits.ConstexprKind); |
2152 | } |
2153 | bool isConstexprSpecified() const { |
2154 | return FunctionDeclBits.ConstexprKind == CSK_constexpr; |
2155 | } |
2156 | bool isConsteval() const { |
2157 | return FunctionDeclBits.ConstexprKind == CSK_consteval; |
2158 | } |
2159 | |
2160 | /// Whether the instantiation of this function is pending. |
2161 | /// This bit is set when the decision to instantiate this function is made |
2162 | /// and unset if and when the function body is created. That leaves out |
2163 | /// cases where instantiation did not happen because the template definition |
2164 | /// was not seen in this TU. This bit remains set in those cases, under the |
2165 | /// assumption that the instantiation will happen in some other TU. |
2166 | bool instantiationIsPending() const { |
2167 | return FunctionDeclBits.InstantiationIsPending; |
2168 | } |
2169 | |
2170 | /// State that the instantiation of this function is pending. |
2171 | /// (see instantiationIsPending) |
2172 | void setInstantiationIsPending(bool IC) { |
2173 | FunctionDeclBits.InstantiationIsPending = IC; |
2174 | } |
2175 | |
2176 | /// Indicates the function uses __try. |
2177 | bool usesSEHTry() const { return FunctionDeclBits.UsesSEHTry; } |
2178 | void setUsesSEHTry(bool UST) { FunctionDeclBits.UsesSEHTry = UST; } |
2179 | |
2180 | /// Whether this function has been deleted. |
2181 | /// |
2182 | /// A function that is "deleted" (via the C++0x "= delete" syntax) |
2183 | /// acts like a normal function, except that it cannot actually be |
2184 | /// called or have its address taken. Deleted functions are |
2185 | /// typically used in C++ overload resolution to attract arguments |
2186 | /// whose type or lvalue/rvalue-ness would permit the use of a |
2187 | /// different overload that would behave incorrectly. For example, |
2188 | /// one might use deleted functions to ban implicit conversion from |
2189 | /// a floating-point number to an Integer type: |
2190 | /// |
2191 | /// @code |
2192 | /// struct Integer { |
2193 | /// Integer(long); // construct from a long |
2194 | /// Integer(double) = delete; // no construction from float or double |
2195 | /// Integer(long double) = delete; // no construction from long double |
2196 | /// }; |
2197 | /// @endcode |
2198 | // If a function is deleted, its first declaration must be. |
2199 | bool isDeleted() const { |
2200 | return getCanonicalDecl()->FunctionDeclBits.IsDeleted; |
2201 | } |
2202 | |
2203 | bool isDeletedAsWritten() const { |
2204 | return FunctionDeclBits.IsDeleted && !isDefaulted(); |
2205 | } |
2206 | |
2207 | void setDeletedAsWritten(bool D = true) { FunctionDeclBits.IsDeleted = D; } |
2208 | |
2209 | /// Determines whether this function is "main", which is the |
2210 | /// entry point into an executable program. |
2211 | bool isMain() const; |
2212 | |
2213 | /// Determines whether this function is a MSVCRT user defined entry |
2214 | /// point. |
2215 | bool isMSVCRTEntryPoint() const; |
2216 | |
2217 | /// Determines whether this operator new or delete is one |
2218 | /// of the reserved global placement operators: |
2219 | /// void *operator new(size_t, void *); |
2220 | /// void *operator new[](size_t, void *); |
2221 | /// void operator delete(void *, void *); |
2222 | /// void operator delete[](void *, void *); |
2223 | /// These functions have special behavior under [new.delete.placement]: |
2224 | /// These functions are reserved, a C++ program may not define |
2225 | /// functions that displace the versions in the Standard C++ library. |
2226 | /// The provisions of [basic.stc.dynamic] do not apply to these |
2227 | /// reserved placement forms of operator new and operator delete. |
2228 | /// |
2229 | /// This function must be an allocation or deallocation function. |
2230 | bool isReservedGlobalPlacementOperator() const; |
2231 | |
2232 | /// Determines whether this function is one of the replaceable |
2233 | /// global allocation functions: |
2234 | /// void *operator new(size_t); |
2235 | /// void *operator new(size_t, const std::nothrow_t &) noexcept; |
2236 | /// void *operator new[](size_t); |
2237 | /// void *operator new[](size_t, const std::nothrow_t &) noexcept; |
2238 | /// void operator delete(void *) noexcept; |
2239 | /// void operator delete(void *, std::size_t) noexcept; [C++1y] |
2240 | /// void operator delete(void *, const std::nothrow_t &) noexcept; |
2241 | /// void operator delete[](void *) noexcept; |
2242 | /// void operator delete[](void *, std::size_t) noexcept; [C++1y] |
2243 | /// void operator delete[](void *, const std::nothrow_t &) noexcept; |
2244 | /// These functions have special behavior under C++1y [expr.new]: |
2245 | /// An implementation is allowed to omit a call to a replaceable global |
2246 | /// allocation function. [...] |
2247 | /// |
2248 | /// If this function is an aligned allocation/deallocation function, return |
2249 | /// true through IsAligned. |
2250 | bool isReplaceableGlobalAllocationFunction(bool *IsAligned = nullptr) const; |
2251 | |
2252 | /// Determine whether this is a destroying operator delete. |
2253 | bool isDestroyingOperatorDelete() const; |
2254 | |
2255 | /// Compute the language linkage. |
2256 | LanguageLinkage getLanguageLinkage() const; |
2257 | |
2258 | /// Determines whether this function is a function with |
2259 | /// external, C linkage. |
2260 | bool isExternC() const; |
2261 | |
2262 | /// Determines whether this function's context is, or is nested within, |
2263 | /// a C++ extern "C" linkage spec. |
2264 | bool isInExternCContext() const; |
2265 | |
2266 | /// Determines whether this function's context is, or is nested within, |
2267 | /// a C++ extern "C++" linkage spec. |
2268 | bool isInExternCXXContext() const; |
2269 | |
2270 | /// Determines whether this is a global function. |
2271 | bool isGlobal() const; |
2272 | |
2273 | /// Determines whether this function is known to be 'noreturn', through |
2274 | /// an attribute on its declaration or its type. |
2275 | bool isNoReturn() const; |
2276 | |
2277 | /// True if the function was a definition but its body was skipped. |
2278 | bool hasSkippedBody() const { return FunctionDeclBits.HasSkippedBody; } |
2279 | void setHasSkippedBody(bool Skipped = true) { |
2280 | FunctionDeclBits.HasSkippedBody = Skipped; |
2281 | } |
2282 | |
2283 | /// True if this function will eventually have a body, once it's fully parsed. |
2284 | bool willHaveBody() const { return FunctionDeclBits.WillHaveBody; } |
2285 | void setWillHaveBody(bool V = true) { FunctionDeclBits.WillHaveBody = V; } |
2286 | |
2287 | /// True if this function is considered a multiversioned function. |
2288 | bool isMultiVersion() const { |
2289 | return getCanonicalDecl()->FunctionDeclBits.IsMultiVersion; |
2290 | } |
2291 | |
2292 | /// Sets the multiversion state for this declaration and all of its |
2293 | /// redeclarations. |
2294 | void setIsMultiVersion(bool V = true) { |
2295 | getCanonicalDecl()->FunctionDeclBits.IsMultiVersion = V; |
2296 | } |
2297 | |
2298 | /// Gets the kind of multiversioning attribute this declaration has. Note that |
2299 | /// this can return a value even if the function is not multiversion, such as |
2300 | /// the case of 'target'. |
2301 | MultiVersionKind getMultiVersionKind() const; |
2302 | |
2303 | |
2304 | /// True if this function is a multiversioned dispatch function as a part of |
2305 | /// the cpu_specific/cpu_dispatch functionality. |
2306 | bool isCPUDispatchMultiVersion() const; |
2307 | /// True if this function is a multiversioned processor specific function as a |
2308 | /// part of the cpu_specific/cpu_dispatch functionality. |
2309 | bool isCPUSpecificMultiVersion() const; |
2310 | |
2311 | /// True if this function is a multiversioned dispatch function as a part of |
2312 | /// the target functionality. |
2313 | bool isTargetMultiVersion() const; |
2314 | |
2315 | void setPreviousDeclaration(FunctionDecl * PrevDecl); |
2316 | |
2317 | FunctionDecl *getCanonicalDecl() override; |
2318 | const FunctionDecl *getCanonicalDecl() const { |
2319 | return const_cast<FunctionDecl*>(this)->getCanonicalDecl(); |
2320 | } |
2321 | |
2322 | unsigned getBuiltinID(bool ConsiderWrapperFunctions = false) const; |
2323 | |
2324 | // ArrayRef interface to parameters. |
2325 | ArrayRef<ParmVarDecl *> parameters() const { |
2326 | return {ParamInfo, getNumParams()}; |
2327 | } |
2328 | MutableArrayRef<ParmVarDecl *> parameters() { |
2329 | return {ParamInfo, getNumParams()}; |
2330 | } |
2331 | |
2332 | // Iterator access to formal parameters. |
2333 | using param_iterator = MutableArrayRef<ParmVarDecl *>::iterator; |
2334 | using param_const_iterator = ArrayRef<ParmVarDecl *>::const_iterator; |
2335 | |
2336 | bool param_empty() const { return parameters().empty(); } |
2337 | param_iterator param_begin() { return parameters().begin(); } |
2338 | param_iterator param_end() { return parameters().end(); } |
2339 | param_const_iterator param_begin() const { return parameters().begin(); } |
2340 | param_const_iterator param_end() const { return parameters().end(); } |
2341 | size_t param_size() const { return parameters().size(); } |
2342 | |
2343 | /// Return the number of parameters this function must have based on its |
2344 | /// FunctionType. This is the length of the ParamInfo array after it has been |
2345 | /// created. |
2346 | unsigned getNumParams() const; |
2347 | |
2348 | const ParmVarDecl *getParamDecl(unsigned i) const { |
2349 | assert(i < getNumParams() && "Illegal param #")((i < getNumParams() && "Illegal param #") ? static_cast <void> (0) : __assert_fail ("i < getNumParams() && \"Illegal param #\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2349, __PRETTY_FUNCTION__)); |
2350 | return ParamInfo[i]; |
2351 | } |
2352 | ParmVarDecl *getParamDecl(unsigned i) { |
2353 | assert(i < getNumParams() && "Illegal param #")((i < getNumParams() && "Illegal param #") ? static_cast <void> (0) : __assert_fail ("i < getNumParams() && \"Illegal param #\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2353, __PRETTY_FUNCTION__)); |
2354 | return ParamInfo[i]; |
2355 | } |
2356 | void setParams(ArrayRef<ParmVarDecl *> NewParamInfo) { |
2357 | setParams(getASTContext(), NewParamInfo); |
2358 | } |
2359 | |
2360 | /// Returns the minimum number of arguments needed to call this function. This |
2361 | /// may be fewer than the number of function parameters, if some of the |
2362 | /// parameters have default arguments (in C++). |
2363 | unsigned getMinRequiredArguments() const; |
2364 | |
2365 | QualType getReturnType() const { |
2366 | return getType()->castAs<FunctionType>()->getReturnType(); |
2367 | } |
2368 | |
2369 | /// Attempt to compute an informative source range covering the |
2370 | /// function return type. This may omit qualifiers and other information with |
2371 | /// limited representation in the AST. |
2372 | SourceRange getReturnTypeSourceRange() const; |
2373 | |
2374 | /// Get the declared return type, which may differ from the actual return |
2375 | /// type if the return type is deduced. |
2376 | QualType getDeclaredReturnType() const { |
2377 | auto *TSI = getTypeSourceInfo(); |
2378 | QualType T = TSI ? TSI->getType() : getType(); |
2379 | return T->castAs<FunctionType>()->getReturnType(); |
2380 | } |
2381 | |
2382 | /// Gets the ExceptionSpecificationType as declared. |
2383 | ExceptionSpecificationType getExceptionSpecType() const { |
2384 | auto *TSI = getTypeSourceInfo(); |
2385 | QualType T = TSI ? TSI->getType() : getType(); |
2386 | const auto *FPT = T->getAs<FunctionProtoType>(); |
2387 | return FPT ? FPT->getExceptionSpecType() : EST_None; |
2388 | } |
2389 | |
2390 | /// Attempt to compute an informative source range covering the |
2391 | /// function exception specification, if any. |
2392 | SourceRange getExceptionSpecSourceRange() const; |
2393 | |
2394 | /// Determine the type of an expression that calls this function. |
2395 | QualType getCallResultType() const { |
2396 | return getType()->castAs<FunctionType>()->getCallResultType( |
2397 | getASTContext()); |
2398 | } |
2399 | |
2400 | /// Returns the storage class as written in the source. For the |
2401 | /// computed linkage of symbol, see getLinkage. |
2402 | StorageClass getStorageClass() const { |
2403 | return static_cast<StorageClass>(FunctionDeclBits.SClass); |
2404 | } |
2405 | |
2406 | /// Sets the storage class as written in the source. |
2407 | void setStorageClass(StorageClass SClass) { |
2408 | FunctionDeclBits.SClass = SClass; |
2409 | } |
2410 | |
2411 | /// Determine whether the "inline" keyword was specified for this |
2412 | /// function. |
2413 | bool isInlineSpecified() const { return FunctionDeclBits.IsInlineSpecified; } |
2414 | |
2415 | /// Set whether the "inline" keyword was specified for this function. |
2416 | void setInlineSpecified(bool I) { |
2417 | FunctionDeclBits.IsInlineSpecified = I; |
2418 | FunctionDeclBits.IsInline = I; |
2419 | } |
2420 | |
2421 | /// Flag that this function is implicitly inline. |
2422 | void setImplicitlyInline(bool I = true) { FunctionDeclBits.IsInline = I; } |
2423 | |
2424 | /// Determine whether this function should be inlined, because it is |
2425 | /// either marked "inline" or "constexpr" or is a member function of a class |
2426 | /// that was defined in the class body. |
2427 | bool isInlined() const { return FunctionDeclBits.IsInline; } |
2428 | |
2429 | bool isInlineDefinitionExternallyVisible() const; |
2430 | |
2431 | bool isMSExternInline() const; |
2432 | |
2433 | bool doesDeclarationForceExternallyVisibleDefinition() const; |
2434 | |
2435 | bool isStatic() const { return getStorageClass() == SC_Static; } |
2436 | |
2437 | /// Whether this function declaration represents an C++ overloaded |
2438 | /// operator, e.g., "operator+". |
2439 | bool isOverloadedOperator() const { |
2440 | return getOverloadedOperator() != OO_None; |
2441 | } |
2442 | |
2443 | OverloadedOperatorKind getOverloadedOperator() const; |
2444 | |
2445 | const IdentifierInfo *getLiteralIdentifier() const; |
2446 | |
2447 | /// If this function is an instantiation of a member function |
2448 | /// of a class template specialization, retrieves the function from |
2449 | /// which it was instantiated. |
2450 | /// |
2451 | /// This routine will return non-NULL for (non-templated) member |
2452 | /// functions of class templates and for instantiations of function |
2453 | /// templates. For example, given: |
2454 | /// |
2455 | /// \code |
2456 | /// template<typename T> |
2457 | /// struct X { |
2458 | /// void f(T); |
2459 | /// }; |
2460 | /// \endcode |
2461 | /// |
2462 | /// The declaration for X<int>::f is a (non-templated) FunctionDecl |
2463 | /// whose parent is the class template specialization X<int>. For |
2464 | /// this declaration, getInstantiatedFromFunction() will return |
2465 | /// the FunctionDecl X<T>::A. When a complete definition of |
2466 | /// X<int>::A is required, it will be instantiated from the |
2467 | /// declaration returned by getInstantiatedFromMemberFunction(). |
2468 | FunctionDecl *getInstantiatedFromMemberFunction() const; |
2469 | |
2470 | /// What kind of templated function this is. |
2471 | TemplatedKind getTemplatedKind() const; |
2472 | |
2473 | /// If this function is an instantiation of a member function of a |
2474 | /// class template specialization, retrieves the member specialization |
2475 | /// information. |
2476 | MemberSpecializationInfo *getMemberSpecializationInfo() const; |
2477 | |
2478 | /// Specify that this record is an instantiation of the |
2479 | /// member function FD. |
2480 | void setInstantiationOfMemberFunction(FunctionDecl *FD, |
2481 | TemplateSpecializationKind TSK) { |
2482 | setInstantiationOfMemberFunction(getASTContext(), FD, TSK); |
2483 | } |
2484 | |
2485 | /// Retrieves the function template that is described by this |
2486 | /// function declaration. |
2487 | /// |
2488 | /// Every function template is represented as a FunctionTemplateDecl |
2489 | /// and a FunctionDecl (or something derived from FunctionDecl). The |
2490 | /// former contains template properties (such as the template |
2491 | /// parameter lists) while the latter contains the actual |
2492 | /// description of the template's |
2493 | /// contents. FunctionTemplateDecl::getTemplatedDecl() retrieves the |
2494 | /// FunctionDecl that describes the function template, |
2495 | /// getDescribedFunctionTemplate() retrieves the |
2496 | /// FunctionTemplateDecl from a FunctionDecl. |
2497 | FunctionTemplateDecl *getDescribedFunctionTemplate() const; |
2498 | |
2499 | void setDescribedFunctionTemplate(FunctionTemplateDecl *Template); |
2500 | |
2501 | /// Determine whether this function is a function template |
2502 | /// specialization. |
2503 | bool isFunctionTemplateSpecialization() const { |
2504 | return getPrimaryTemplate() != nullptr; |
2505 | } |
2506 | |
2507 | /// If this function is actually a function template specialization, |
2508 | /// retrieve information about this function template specialization. |
2509 | /// Otherwise, returns NULL. |
2510 | FunctionTemplateSpecializationInfo *getTemplateSpecializationInfo() const; |
2511 | |
2512 | /// Determines whether this function is a function template |
2513 | /// specialization or a member of a class template specialization that can |
2514 | /// be implicitly instantiated. |
2515 | bool isImplicitlyInstantiable() const; |
2516 | |
2517 | /// Determines if the given function was instantiated from a |
2518 | /// function template. |
2519 | bool isTemplateInstantiation() const; |
2520 | |
2521 | /// Retrieve the function declaration from which this function could |
2522 | /// be instantiated, if it is an instantiation (rather than a non-template |
2523 | /// or a specialization, for example). |
2524 | FunctionDecl *getTemplateInstantiationPattern() const; |
2525 | |
2526 | /// Retrieve the primary template that this function template |
2527 | /// specialization either specializes or was instantiated from. |
2528 | /// |
2529 | /// If this function declaration is not a function template specialization, |
2530 | /// returns NULL. |
2531 | FunctionTemplateDecl *getPrimaryTemplate() const; |
2532 | |
2533 | /// Retrieve the template arguments used to produce this function |
2534 | /// template specialization from the primary template. |
2535 | /// |
2536 | /// If this function declaration is not a function template specialization, |
2537 | /// returns NULL. |
2538 | const TemplateArgumentList *getTemplateSpecializationArgs() const; |
2539 | |
2540 | /// Retrieve the template argument list as written in the sources, |
2541 | /// if any. |
2542 | /// |
2543 | /// If this function declaration is not a function template specialization |
2544 | /// or if it had no explicit template argument list, returns NULL. |
2545 | /// Note that it an explicit template argument list may be written empty, |
2546 | /// e.g., template<> void foo<>(char* s); |
2547 | const ASTTemplateArgumentListInfo* |
2548 | getTemplateSpecializationArgsAsWritten() const; |
2549 | |
2550 | /// Specify that this function declaration is actually a function |
2551 | /// template specialization. |
2552 | /// |
2553 | /// \param Template the function template that this function template |
2554 | /// specialization specializes. |
2555 | /// |
2556 | /// \param TemplateArgs the template arguments that produced this |
2557 | /// function template specialization from the template. |
2558 | /// |
2559 | /// \param InsertPos If non-NULL, the position in the function template |
2560 | /// specialization set where the function template specialization data will |
2561 | /// be inserted. |
2562 | /// |
2563 | /// \param TSK the kind of template specialization this is. |
2564 | /// |
2565 | /// \param TemplateArgsAsWritten location info of template arguments. |
2566 | /// |
2567 | /// \param PointOfInstantiation point at which the function template |
2568 | /// specialization was first instantiated. |
2569 | void setFunctionTemplateSpecialization(FunctionTemplateDecl *Template, |
2570 | const TemplateArgumentList *TemplateArgs, |
2571 | void *InsertPos, |
2572 | TemplateSpecializationKind TSK = TSK_ImplicitInstantiation, |
2573 | const TemplateArgumentListInfo *TemplateArgsAsWritten = nullptr, |
2574 | SourceLocation PointOfInstantiation = SourceLocation()) { |
2575 | setFunctionTemplateSpecialization(getASTContext(), Template, TemplateArgs, |
2576 | InsertPos, TSK, TemplateArgsAsWritten, |
2577 | PointOfInstantiation); |
2578 | } |
2579 | |
2580 | /// Specifies that this function declaration is actually a |
2581 | /// dependent function template specialization. |
2582 | void setDependentTemplateSpecialization(ASTContext &Context, |
2583 | const UnresolvedSetImpl &Templates, |
2584 | const TemplateArgumentListInfo &TemplateArgs); |
2585 | |
2586 | DependentFunctionTemplateSpecializationInfo * |
2587 | getDependentSpecializationInfo() const; |
2588 | |
2589 | /// Determine what kind of template instantiation this function |
2590 | /// represents. |
2591 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
2592 | |
2593 | /// Determine the kind of template specialization this function represents |
2594 | /// for the purpose of template instantiation. |
2595 | TemplateSpecializationKind |
2596 | getTemplateSpecializationKindForInstantiation() const; |
2597 | |
2598 | /// Determine what kind of template instantiation this function |
2599 | /// represents. |
2600 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK, |
2601 | SourceLocation PointOfInstantiation = SourceLocation()); |
2602 | |
2603 | /// Retrieve the (first) point of instantiation of a function template |
2604 | /// specialization or a member of a class template specialization. |
2605 | /// |
2606 | /// \returns the first point of instantiation, if this function was |
2607 | /// instantiated from a template; otherwise, returns an invalid source |
2608 | /// location. |
2609 | SourceLocation getPointOfInstantiation() const; |
2610 | |
2611 | /// Determine whether this is or was instantiated from an out-of-line |
2612 | /// definition of a member function. |
2613 | bool isOutOfLine() const override; |
2614 | |
2615 | /// Identify a memory copying or setting function. |
2616 | /// If the given function is a memory copy or setting function, returns |
2617 | /// the corresponding Builtin ID. If the function is not a memory function, |
2618 | /// returns 0. |
2619 | unsigned getMemoryFunctionKind() const; |
2620 | |
2621 | /// Returns ODRHash of the function. This value is calculated and |
2622 | /// stored on first call, then the stored value returned on the other calls. |
2623 | unsigned getODRHash(); |
2624 | |
2625 | /// Returns cached ODRHash of the function. This must have been previously |
2626 | /// computed and stored. |
2627 | unsigned getODRHash() const; |
2628 | |
2629 | // Implement isa/cast/dyncast/etc. |
2630 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2631 | static bool classofKind(Kind K) { |
2632 | return K >= firstFunction && K <= lastFunction; |
2633 | } |
2634 | static DeclContext *castToDeclContext(const FunctionDecl *D) { |
2635 | return static_cast<DeclContext *>(const_cast<FunctionDecl*>(D)); |
2636 | } |
2637 | static FunctionDecl *castFromDeclContext(const DeclContext *DC) { |
2638 | return static_cast<FunctionDecl *>(const_cast<DeclContext*>(DC)); |
2639 | } |
2640 | }; |
2641 | |
2642 | /// Represents a member of a struct/union/class. |
2643 | class FieldDecl : public DeclaratorDecl, public Mergeable<FieldDecl> { |
2644 | unsigned BitField : 1; |
2645 | unsigned Mutable : 1; |
2646 | mutable unsigned CachedFieldIndex : 30; |
2647 | |
2648 | /// The kinds of value we can store in InitializerOrBitWidth. |
2649 | /// |
2650 | /// Note that this is compatible with InClassInitStyle except for |
2651 | /// ISK_CapturedVLAType. |
2652 | enum InitStorageKind { |
2653 | /// If the pointer is null, there's nothing special. Otherwise, |
2654 | /// this is a bitfield and the pointer is the Expr* storing the |
2655 | /// bit-width. |
2656 | ISK_NoInit = (unsigned) ICIS_NoInit, |
2657 | |
2658 | /// The pointer is an (optional due to delayed parsing) Expr* |
2659 | /// holding the copy-initializer. |
2660 | ISK_InClassCopyInit = (unsigned) ICIS_CopyInit, |
2661 | |
2662 | /// The pointer is an (optional due to delayed parsing) Expr* |
2663 | /// holding the list-initializer. |
2664 | ISK_InClassListInit = (unsigned) ICIS_ListInit, |
2665 | |
2666 | /// The pointer is a VariableArrayType* that's been captured; |
2667 | /// the enclosing context is a lambda or captured statement. |
2668 | ISK_CapturedVLAType, |
2669 | }; |
2670 | |
2671 | /// If this is a bitfield with a default member initializer, this |
2672 | /// structure is used to represent the two expressions. |
2673 | struct InitAndBitWidth { |
2674 | Expr *Init; |
2675 | Expr *BitWidth; |
2676 | }; |
2677 | |
2678 | /// Storage for either the bit-width, the in-class initializer, or |
2679 | /// both (via InitAndBitWidth), or the captured variable length array bound. |
2680 | /// |
2681 | /// If the storage kind is ISK_InClassCopyInit or |
2682 | /// ISK_InClassListInit, but the initializer is null, then this |
2683 | /// field has an in-class initializer that has not yet been parsed |
2684 | /// and attached. |
2685 | // FIXME: Tail-allocate this to reduce the size of FieldDecl in the |
2686 | // overwhelmingly common case that we have none of these things. |
2687 | llvm::PointerIntPair<void *, 2, InitStorageKind> InitStorage; |
2688 | |
2689 | protected: |
2690 | FieldDecl(Kind DK, DeclContext *DC, SourceLocation StartLoc, |
2691 | SourceLocation IdLoc, IdentifierInfo *Id, |
2692 | QualType T, TypeSourceInfo *TInfo, Expr *BW, bool Mutable, |
2693 | InClassInitStyle InitStyle) |
2694 | : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc), |
2695 | BitField(false), Mutable(Mutable), CachedFieldIndex(0), |
2696 | InitStorage(nullptr, (InitStorageKind) InitStyle) { |
2697 | if (BW) |
2698 | setBitWidth(BW); |
2699 | } |
2700 | |
2701 | public: |
2702 | friend class ASTDeclReader; |
2703 | friend class ASTDeclWriter; |
2704 | |
2705 | static FieldDecl *Create(const ASTContext &C, DeclContext *DC, |
2706 | SourceLocation StartLoc, SourceLocation IdLoc, |
2707 | IdentifierInfo *Id, QualType T, |
2708 | TypeSourceInfo *TInfo, Expr *BW, bool Mutable, |
2709 | InClassInitStyle InitStyle); |
2710 | |
2711 | static FieldDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
2712 | |
2713 | /// Returns the index of this field within its record, |
2714 | /// as appropriate for passing to ASTRecordLayout::getFieldOffset. |
2715 | unsigned getFieldIndex() const; |
2716 | |
2717 | /// Determines whether this field is mutable (C++ only). |
2718 | bool isMutable() const { return Mutable; } |
2719 | |
2720 | /// Determines whether this field is a bitfield. |
2721 | bool isBitField() const { return BitField; } |
2722 | |
2723 | /// Determines whether this is an unnamed bitfield. |
2724 | bool isUnnamedBitfield() const { return isBitField() && !getDeclName(); } |
2725 | |
2726 | /// Determines whether this field is a |
2727 | /// representative for an anonymous struct or union. Such fields are |
2728 | /// unnamed and are implicitly generated by the implementation to |
2729 | /// store the data for the anonymous union or struct. |
2730 | bool isAnonymousStructOrUnion() const; |
2731 | |
2732 | Expr *getBitWidth() const { |
2733 | if (!BitField) |
2734 | return nullptr; |
2735 | void *Ptr = InitStorage.getPointer(); |
2736 | if (getInClassInitStyle()) |
2737 | return static_cast<InitAndBitWidth*>(Ptr)->BitWidth; |
2738 | return static_cast<Expr*>(Ptr); |
2739 | } |
2740 | |
2741 | unsigned getBitWidthValue(const ASTContext &Ctx) const; |
2742 | |
2743 | /// Set the bit-field width for this member. |
2744 | // Note: used by some clients (i.e., do not remove it). |
2745 | void setBitWidth(Expr *Width) { |
2746 | assert(!hasCapturedVLAType() && !BitField &&((!hasCapturedVLAType() && !BitField && "bit width or captured type already set" ) ? static_cast<void> (0) : __assert_fail ("!hasCapturedVLAType() && !BitField && \"bit width or captured type already set\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2747, __PRETTY_FUNCTION__)) |
2747 | "bit width or captured type already set")((!hasCapturedVLAType() && !BitField && "bit width or captured type already set" ) ? static_cast<void> (0) : __assert_fail ("!hasCapturedVLAType() && !BitField && \"bit width or captured type already set\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2747, __PRETTY_FUNCTION__)); |
2748 | assert(Width && "no bit width specified")((Width && "no bit width specified") ? static_cast< void> (0) : __assert_fail ("Width && \"no bit width specified\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2748, __PRETTY_FUNCTION__)); |
2749 | InitStorage.setPointer( |
2750 | InitStorage.getInt() |
2751 | ? new (getASTContext()) |
2752 | InitAndBitWidth{getInClassInitializer(), Width} |
2753 | : static_cast<void*>(Width)); |
2754 | BitField = true; |
2755 | } |
2756 | |
2757 | /// Remove the bit-field width from this member. |
2758 | // Note: used by some clients (i.e., do not remove it). |
2759 | void removeBitWidth() { |
2760 | assert(isBitField() && "no bitfield width to remove")((isBitField() && "no bitfield width to remove") ? static_cast <void> (0) : __assert_fail ("isBitField() && \"no bitfield width to remove\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2760, __PRETTY_FUNCTION__)); |
2761 | InitStorage.setPointer(getInClassInitializer()); |
2762 | BitField = false; |
2763 | } |
2764 | |
2765 | /// Is this a zero-length bit-field? Such bit-fields aren't really bit-fields |
2766 | /// at all and instead act as a separator between contiguous runs of other |
2767 | /// bit-fields. |
2768 | bool isZeroLengthBitField(const ASTContext &Ctx) const; |
2769 | |
2770 | /// Determine if this field is a subobject of zero size, that is, either a |
2771 | /// zero-length bit-field or a field of empty class type with the |
2772 | /// [[no_unique_address]] attribute. |
2773 | bool isZeroSize(const ASTContext &Ctx) const; |
2774 | |
2775 | /// Get the kind of (C++11) default member initializer that this field has. |
2776 | InClassInitStyle getInClassInitStyle() const { |
2777 | InitStorageKind storageKind = InitStorage.getInt(); |
2778 | return (storageKind == ISK_CapturedVLAType |
2779 | ? ICIS_NoInit : (InClassInitStyle) storageKind); |
2780 | } |
2781 | |
2782 | /// Determine whether this member has a C++11 default member initializer. |
2783 | bool hasInClassInitializer() const { |
2784 | return getInClassInitStyle() != ICIS_NoInit; |
2785 | } |
2786 | |
2787 | /// Get the C++11 default member initializer for this member, or null if one |
2788 | /// has not been set. If a valid declaration has a default member initializer, |
2789 | /// but this returns null, then we have not parsed and attached it yet. |
2790 | Expr *getInClassInitializer() const { |
2791 | if (!hasInClassInitializer()) |
2792 | return nullptr; |
2793 | void *Ptr = InitStorage.getPointer(); |
2794 | if (BitField) |
2795 | return static_cast<InitAndBitWidth*>(Ptr)->Init; |
2796 | return static_cast<Expr*>(Ptr); |
2797 | } |
2798 | |
2799 | /// Set the C++11 in-class initializer for this member. |
2800 | void setInClassInitializer(Expr *Init) { |
2801 | assert(hasInClassInitializer() && !getInClassInitializer())((hasInClassInitializer() && !getInClassInitializer() ) ? static_cast<void> (0) : __assert_fail ("hasInClassInitializer() && !getInClassInitializer()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2801, __PRETTY_FUNCTION__)); |
2802 | if (BitField) |
2803 | static_cast<InitAndBitWidth*>(InitStorage.getPointer())->Init = Init; |
2804 | else |
2805 | InitStorage.setPointer(Init); |
2806 | } |
2807 | |
2808 | /// Remove the C++11 in-class initializer from this member. |
2809 | void removeInClassInitializer() { |
2810 | assert(hasInClassInitializer() && "no initializer to remove")((hasInClassInitializer() && "no initializer to remove" ) ? static_cast<void> (0) : __assert_fail ("hasInClassInitializer() && \"no initializer to remove\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2810, __PRETTY_FUNCTION__)); |
2811 | InitStorage.setPointerAndInt(getBitWidth(), ISK_NoInit); |
2812 | } |
2813 | |
2814 | /// Determine whether this member captures the variable length array |
2815 | /// type. |
2816 | bool hasCapturedVLAType() const { |
2817 | return InitStorage.getInt() == ISK_CapturedVLAType; |
2818 | } |
2819 | |
2820 | /// Get the captured variable length array type. |
2821 | const VariableArrayType *getCapturedVLAType() const { |
2822 | return hasCapturedVLAType() ? static_cast<const VariableArrayType *>( |
2823 | InitStorage.getPointer()) |
2824 | : nullptr; |
2825 | } |
2826 | |
2827 | /// Set the captured variable length array type for this field. |
2828 | void setCapturedVLAType(const VariableArrayType *VLAType); |
2829 | |
2830 | /// Returns the parent of this field declaration, which |
2831 | /// is the struct in which this field is defined. |
2832 | const RecordDecl *getParent() const { |
2833 | return cast<RecordDecl>(getDeclContext()); |
2834 | } |
2835 | |
2836 | RecordDecl *getParent() { |
2837 | return cast<RecordDecl>(getDeclContext()); |
2838 | } |
2839 | |
2840 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
2841 | |
2842 | /// Retrieves the canonical declaration of this field. |
2843 | FieldDecl *getCanonicalDecl() override { return getFirstDecl(); } |
2844 | const FieldDecl *getCanonicalDecl() const { return getFirstDecl(); } |
2845 | |
2846 | // Implement isa/cast/dyncast/etc. |
2847 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2848 | static bool classofKind(Kind K) { return K >= firstField && K <= lastField; } |
2849 | }; |
2850 | |
2851 | /// An instance of this object exists for each enum constant |
2852 | /// that is defined. For example, in "enum X {a,b}", each of a/b are |
2853 | /// EnumConstantDecl's, X is an instance of EnumDecl, and the type of a/b is a |
2854 | /// TagType for the X EnumDecl. |
2855 | class EnumConstantDecl : public ValueDecl, public Mergeable<EnumConstantDecl> { |
2856 | Stmt *Init; // an integer constant expression |
2857 | llvm::APSInt Val; // The value. |
2858 | |
2859 | protected: |
2860 | EnumConstantDecl(DeclContext *DC, SourceLocation L, |
2861 | IdentifierInfo *Id, QualType T, Expr *E, |
2862 | const llvm::APSInt &V) |
2863 | : ValueDecl(EnumConstant, DC, L, Id, T), Init((Stmt*)E), Val(V) {} |
2864 | |
2865 | public: |
2866 | friend class StmtIteratorBase; |
2867 | |
2868 | static EnumConstantDecl *Create(ASTContext &C, EnumDecl *DC, |
2869 | SourceLocation L, IdentifierInfo *Id, |
2870 | QualType T, Expr *E, |
2871 | const llvm::APSInt &V); |
2872 | static EnumConstantDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
2873 | |
2874 | const Expr *getInitExpr() const { return (const Expr*) Init; } |
2875 | Expr *getInitExpr() { return (Expr*) Init; } |
2876 | const llvm::APSInt &getInitVal() const { return Val; } |
2877 | |
2878 | void setInitExpr(Expr *E) { Init = (Stmt*) E; } |
2879 | void setInitVal(const llvm::APSInt &V) { Val = V; } |
2880 | |
2881 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
2882 | |
2883 | /// Retrieves the canonical declaration of this enumerator. |
2884 | EnumConstantDecl *getCanonicalDecl() override { return getFirstDecl(); } |
2885 | const EnumConstantDecl *getCanonicalDecl() const { return getFirstDecl(); } |
2886 | |
2887 | // Implement isa/cast/dyncast/etc. |
2888 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2889 | static bool classofKind(Kind K) { return K == EnumConstant; } |
2890 | }; |
2891 | |
2892 | /// Represents a field injected from an anonymous union/struct into the parent |
2893 | /// scope. These are always implicit. |
2894 | class IndirectFieldDecl : public ValueDecl, |
2895 | public Mergeable<IndirectFieldDecl> { |
2896 | NamedDecl **Chaining; |
2897 | unsigned ChainingSize; |
2898 | |
2899 | IndirectFieldDecl(ASTContext &C, DeclContext *DC, SourceLocation L, |
2900 | DeclarationName N, QualType T, |
2901 | MutableArrayRef<NamedDecl *> CH); |
2902 | |
2903 | void anchor() override; |
2904 | |
2905 | public: |
2906 | friend class ASTDeclReader; |
2907 | |
2908 | static IndirectFieldDecl *Create(ASTContext &C, DeclContext *DC, |
2909 | SourceLocation L, IdentifierInfo *Id, |
2910 | QualType T, llvm::MutableArrayRef<NamedDecl *> CH); |
2911 | |
2912 | static IndirectFieldDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
2913 | |
2914 | using chain_iterator = ArrayRef<NamedDecl *>::const_iterator; |
2915 | |
2916 | ArrayRef<NamedDecl *> chain() const { |
2917 | return llvm::makeArrayRef(Chaining, ChainingSize); |
2918 | } |
2919 | chain_iterator chain_begin() const { return chain().begin(); } |
2920 | chain_iterator chain_end() const { return chain().end(); } |
2921 | |
2922 | unsigned getChainingSize() const { return ChainingSize; } |
2923 | |
2924 | FieldDecl *getAnonField() const { |
2925 | assert(chain().size() >= 2)((chain().size() >= 2) ? static_cast<void> (0) : __assert_fail ("chain().size() >= 2", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2925, __PRETTY_FUNCTION__)); |
2926 | return cast<FieldDecl>(chain().back()); |
2927 | } |
2928 | |
2929 | VarDecl *getVarDecl() const { |
2930 | assert(chain().size() >= 2)((chain().size() >= 2) ? static_cast<void> (0) : __assert_fail ("chain().size() >= 2", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 2930, __PRETTY_FUNCTION__)); |
2931 | return dyn_cast<VarDecl>(chain().front()); |
2932 | } |
2933 | |
2934 | IndirectFieldDecl *getCanonicalDecl() override { return getFirstDecl(); } |
2935 | const IndirectFieldDecl *getCanonicalDecl() const { return getFirstDecl(); } |
2936 | |
2937 | // Implement isa/cast/dyncast/etc. |
2938 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2939 | static bool classofKind(Kind K) { return K == IndirectField; } |
2940 | }; |
2941 | |
2942 | /// Represents a declaration of a type. |
2943 | class TypeDecl : public NamedDecl { |
2944 | friend class ASTContext; |
2945 | |
2946 | /// This indicates the Type object that represents |
2947 | /// this TypeDecl. It is a cache maintained by |
2948 | /// ASTContext::getTypedefType, ASTContext::getTagDeclType, and |
2949 | /// ASTContext::getTemplateTypeParmType, and TemplateTypeParmDecl. |
2950 | mutable const Type *TypeForDecl = nullptr; |
2951 | |
2952 | /// The start of the source range for this declaration. |
2953 | SourceLocation LocStart; |
2954 | |
2955 | void anchor() override; |
2956 | |
2957 | protected: |
2958 | TypeDecl(Kind DK, DeclContext *DC, SourceLocation L, IdentifierInfo *Id, |
2959 | SourceLocation StartL = SourceLocation()) |
2960 | : NamedDecl(DK, DC, L, Id), LocStart(StartL) {} |
2961 | |
2962 | public: |
2963 | // Low-level accessor. If you just want the type defined by this node, |
2964 | // check out ASTContext::getTypeDeclType or one of |
2965 | // ASTContext::getTypedefType, ASTContext::getRecordType, etc. if you |
2966 | // already know the specific kind of node this is. |
2967 | const Type *getTypeForDecl() const { return TypeForDecl; } |
2968 | void setTypeForDecl(const Type *TD) { TypeForDecl = TD; } |
2969 | |
2970 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return LocStart; } |
2971 | void setLocStart(SourceLocation L) { LocStart = L; } |
2972 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
2973 | if (LocStart.isValid()) |
2974 | return SourceRange(LocStart, getLocation()); |
2975 | else |
2976 | return SourceRange(getLocation()); |
2977 | } |
2978 | |
2979 | // Implement isa/cast/dyncast/etc. |
2980 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
2981 | static bool classofKind(Kind K) { return K >= firstType && K <= lastType; } |
2982 | }; |
2983 | |
2984 | /// Base class for declarations which introduce a typedef-name. |
2985 | class TypedefNameDecl : public TypeDecl, public Redeclarable<TypedefNameDecl> { |
2986 | struct alignas(8) ModedTInfo { |
2987 | TypeSourceInfo *first; |
2988 | QualType second; |
2989 | }; |
2990 | |
2991 | /// If int part is 0, we have not computed IsTransparentTag. |
2992 | /// Otherwise, IsTransparentTag is (getInt() >> 1). |
2993 | mutable llvm::PointerIntPair< |
2994 | llvm::PointerUnion<TypeSourceInfo *, ModedTInfo *>, 2> |
2995 | MaybeModedTInfo; |
2996 | |
2997 | void anchor() override; |
2998 | |
2999 | protected: |
3000 | TypedefNameDecl(Kind DK, ASTContext &C, DeclContext *DC, |
3001 | SourceLocation StartLoc, SourceLocation IdLoc, |
3002 | IdentifierInfo *Id, TypeSourceInfo *TInfo) |
3003 | : TypeDecl(DK, DC, IdLoc, Id, StartLoc), redeclarable_base(C), |
3004 | MaybeModedTInfo(TInfo, 0) {} |
3005 | |
3006 | using redeclarable_base = Redeclarable<TypedefNameDecl>; |
3007 | |
3008 | TypedefNameDecl *getNextRedeclarationImpl() override { |
3009 | return getNextRedeclaration(); |
3010 | } |
3011 | |
3012 | TypedefNameDecl *getPreviousDeclImpl() override { |
3013 | return getPreviousDecl(); |
3014 | } |
3015 | |
3016 | TypedefNameDecl *getMostRecentDeclImpl() override { |
3017 | return getMostRecentDecl(); |
3018 | } |
3019 | |
3020 | public: |
3021 | using redecl_range = redeclarable_base::redecl_range; |
3022 | using redecl_iterator = redeclarable_base::redecl_iterator; |
3023 | |
3024 | using redeclarable_base::redecls_begin; |
3025 | using redeclarable_base::redecls_end; |
3026 | using redeclarable_base::redecls; |
3027 | using redeclarable_base::getPreviousDecl; |
3028 | using redeclarable_base::getMostRecentDecl; |
3029 | using redeclarable_base::isFirstDecl; |
3030 | |
3031 | bool isModed() const { |
3032 | return MaybeModedTInfo.getPointer().is<ModedTInfo *>(); |
3033 | } |
3034 | |
3035 | TypeSourceInfo *getTypeSourceInfo() const { |
3036 | return isModed() ? MaybeModedTInfo.getPointer().get<ModedTInfo *>()->first |
3037 | : MaybeModedTInfo.getPointer().get<TypeSourceInfo *>(); |
3038 | } |
3039 | |
3040 | QualType getUnderlyingType() const { |
3041 | return isModed() ? MaybeModedTInfo.getPointer().get<ModedTInfo *>()->second |
3042 | : MaybeModedTInfo.getPointer() |
3043 | .get<TypeSourceInfo *>() |
3044 | ->getType(); |
3045 | } |
3046 | |
3047 | void setTypeSourceInfo(TypeSourceInfo *newType) { |
3048 | MaybeModedTInfo.setPointer(newType); |
3049 | } |
3050 | |
3051 | void setModedTypeSourceInfo(TypeSourceInfo *unmodedTSI, QualType modedTy) { |
3052 | MaybeModedTInfo.setPointer(new (getASTContext(), 8) |
3053 | ModedTInfo({unmodedTSI, modedTy})); |
3054 | } |
3055 | |
3056 | /// Retrieves the canonical declaration of this typedef-name. |
3057 | TypedefNameDecl *getCanonicalDecl() override { return getFirstDecl(); } |
3058 | const TypedefNameDecl *getCanonicalDecl() const { return getFirstDecl(); } |
3059 | |
3060 | /// Retrieves the tag declaration for which this is the typedef name for |
3061 | /// linkage purposes, if any. |
3062 | /// |
3063 | /// \param AnyRedecl Look for the tag declaration in any redeclaration of |
3064 | /// this typedef declaration. |
3065 | TagDecl *getAnonDeclWithTypedefName(bool AnyRedecl = false) const; |
3066 | |
3067 | /// Determines if this typedef shares a name and spelling location with its |
3068 | /// underlying tag type, as is the case with the NS_ENUM macro. |
3069 | bool isTransparentTag() const { |
3070 | if (MaybeModedTInfo.getInt()) |
3071 | return MaybeModedTInfo.getInt() & 0x2; |
3072 | return isTransparentTagSlow(); |
3073 | } |
3074 | |
3075 | // Implement isa/cast/dyncast/etc. |
3076 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3077 | static bool classofKind(Kind K) { |
3078 | return K >= firstTypedefName && K <= lastTypedefName; |
3079 | } |
3080 | |
3081 | private: |
3082 | bool isTransparentTagSlow() const; |
3083 | }; |
3084 | |
3085 | /// Represents the declaration of a typedef-name via the 'typedef' |
3086 | /// type specifier. |
3087 | class TypedefDecl : public TypedefNameDecl { |
3088 | TypedefDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
3089 | SourceLocation IdLoc, IdentifierInfo *Id, TypeSourceInfo *TInfo) |
3090 | : TypedefNameDecl(Typedef, C, DC, StartLoc, IdLoc, Id, TInfo) {} |
3091 | |
3092 | public: |
3093 | static TypedefDecl *Create(ASTContext &C, DeclContext *DC, |
3094 | SourceLocation StartLoc, SourceLocation IdLoc, |
3095 | IdentifierInfo *Id, TypeSourceInfo *TInfo); |
3096 | static TypedefDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3097 | |
3098 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3099 | |
3100 | // Implement isa/cast/dyncast/etc. |
3101 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3102 | static bool classofKind(Kind K) { return K == Typedef; } |
3103 | }; |
3104 | |
3105 | /// Represents the declaration of a typedef-name via a C++11 |
3106 | /// alias-declaration. |
3107 | class TypeAliasDecl : public TypedefNameDecl { |
3108 | /// The template for which this is the pattern, if any. |
3109 | TypeAliasTemplateDecl *Template; |
3110 | |
3111 | TypeAliasDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
3112 | SourceLocation IdLoc, IdentifierInfo *Id, TypeSourceInfo *TInfo) |
3113 | : TypedefNameDecl(TypeAlias, C, DC, StartLoc, IdLoc, Id, TInfo), |
3114 | Template(nullptr) {} |
3115 | |
3116 | public: |
3117 | static TypeAliasDecl *Create(ASTContext &C, DeclContext *DC, |
3118 | SourceLocation StartLoc, SourceLocation IdLoc, |
3119 | IdentifierInfo *Id, TypeSourceInfo *TInfo); |
3120 | static TypeAliasDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3121 | |
3122 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3123 | |
3124 | TypeAliasTemplateDecl *getDescribedAliasTemplate() const { return Template; } |
3125 | void setDescribedAliasTemplate(TypeAliasTemplateDecl *TAT) { Template = TAT; } |
3126 | |
3127 | // Implement isa/cast/dyncast/etc. |
3128 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3129 | static bool classofKind(Kind K) { return K == TypeAlias; } |
3130 | }; |
3131 | |
3132 | /// Represents the declaration of a struct/union/class/enum. |
3133 | class TagDecl : public TypeDecl, |
3134 | public DeclContext, |
3135 | public Redeclarable<TagDecl> { |
3136 | // This class stores some data in DeclContext::TagDeclBits |
3137 | // to save some space. Use the provided accessors to access it. |
3138 | public: |
3139 | // This is really ugly. |
3140 | using TagKind = TagTypeKind; |
3141 | |
3142 | private: |
3143 | SourceRange BraceRange; |
3144 | |
3145 | // A struct representing syntactic qualifier info, |
3146 | // to be used for the (uncommon) case of out-of-line declarations. |
3147 | using ExtInfo = QualifierInfo; |
3148 | |
3149 | /// If the (out-of-line) tag declaration name |
3150 | /// is qualified, it points to the qualifier info (nns and range); |
3151 | /// otherwise, if the tag declaration is anonymous and it is part of |
3152 | /// a typedef or alias, it points to the TypedefNameDecl (used for mangling); |
3153 | /// otherwise, if the tag declaration is anonymous and it is used as a |
3154 | /// declaration specifier for variables, it points to the first VarDecl (used |
3155 | /// for mangling); |
3156 | /// otherwise, it is a null (TypedefNameDecl) pointer. |
3157 | llvm::PointerUnion<TypedefNameDecl *, ExtInfo *> TypedefNameDeclOrQualifier; |
3158 | |
3159 | bool hasExtInfo() const { return TypedefNameDeclOrQualifier.is<ExtInfo *>(); } |
3160 | ExtInfo *getExtInfo() { return TypedefNameDeclOrQualifier.get<ExtInfo *>(); } |
3161 | const ExtInfo *getExtInfo() const { |
3162 | return TypedefNameDeclOrQualifier.get<ExtInfo *>(); |
3163 | } |
3164 | |
3165 | protected: |
3166 | TagDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC, |
3167 | SourceLocation L, IdentifierInfo *Id, TagDecl *PrevDecl, |
3168 | SourceLocation StartL); |
3169 | |
3170 | using redeclarable_base = Redeclarable<TagDecl>; |
3171 | |
3172 | TagDecl *getNextRedeclarationImpl() override { |
3173 | return getNextRedeclaration(); |
3174 | } |
3175 | |
3176 | TagDecl *getPreviousDeclImpl() override { |
3177 | return getPreviousDecl(); |
3178 | } |
3179 | |
3180 | TagDecl *getMostRecentDeclImpl() override { |
3181 | return getMostRecentDecl(); |
3182 | } |
3183 | |
3184 | /// Completes the definition of this tag declaration. |
3185 | /// |
3186 | /// This is a helper function for derived classes. |
3187 | void completeDefinition(); |
3188 | |
3189 | /// True if this decl is currently being defined. |
3190 | void setBeingDefined(bool V = true) { TagDeclBits.IsBeingDefined = V; } |
3191 | |
3192 | /// Indicates whether it is possible for declarations of this kind |
3193 | /// to have an out-of-date definition. |
3194 | /// |
3195 | /// This option is only enabled when modules are enabled. |
3196 | void setMayHaveOutOfDateDef(bool V = true) { |
3197 | TagDeclBits.MayHaveOutOfDateDef = V; |
3198 | } |
3199 | |
3200 | public: |
3201 | friend class ASTDeclReader; |
3202 | friend class ASTDeclWriter; |
3203 | |
3204 | using redecl_range = redeclarable_base::redecl_range; |
3205 | using redecl_iterator = redeclarable_base::redecl_iterator; |
3206 | |
3207 | using redeclarable_base::redecls_begin; |
3208 | using redeclarable_base::redecls_end; |
3209 | using redeclarable_base::redecls; |
3210 | using redeclarable_base::getPreviousDecl; |
3211 | using redeclarable_base::getMostRecentDecl; |
3212 | using redeclarable_base::isFirstDecl; |
3213 | |
3214 | SourceRange getBraceRange() const { return BraceRange; } |
3215 | void setBraceRange(SourceRange R) { BraceRange = R; } |
3216 | |
3217 | /// Return SourceLocation representing start of source |
3218 | /// range ignoring outer template declarations. |
3219 | SourceLocation getInnerLocStart() const { return getBeginLoc(); } |
3220 | |
3221 | /// Return SourceLocation representing start of source |
3222 | /// range taking into account any outer template declarations. |
3223 | SourceLocation getOuterLocStart() const; |
3224 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
3225 | |
3226 | TagDecl *getCanonicalDecl() override; |
3227 | const TagDecl *getCanonicalDecl() const { |
3228 | return const_cast<TagDecl*>(this)->getCanonicalDecl(); |
3229 | } |
3230 | |
3231 | /// Return true if this declaration is a completion definition of the type. |
3232 | /// Provided for consistency. |
3233 | bool isThisDeclarationADefinition() const { |
3234 | return isCompleteDefinition(); |
3235 | } |
3236 | |
3237 | /// Return true if this decl has its body fully specified. |
3238 | bool isCompleteDefinition() const { return TagDeclBits.IsCompleteDefinition; } |
3239 | |
3240 | /// True if this decl has its body fully specified. |
3241 | void setCompleteDefinition(bool V = true) { |
3242 | TagDeclBits.IsCompleteDefinition = V; |
3243 | } |
3244 | |
3245 | /// Return true if this complete decl is |
3246 | /// required to be complete for some existing use. |
3247 | bool isCompleteDefinitionRequired() const { |
3248 | return TagDeclBits.IsCompleteDefinitionRequired; |
3249 | } |
3250 | |
3251 | /// True if this complete decl is |
3252 | /// required to be complete for some existing use. |
3253 | void setCompleteDefinitionRequired(bool V = true) { |
3254 | TagDeclBits.IsCompleteDefinitionRequired = V; |
3255 | } |
3256 | |
3257 | /// Return true if this decl is currently being defined. |
3258 | bool isBeingDefined() const { return TagDeclBits.IsBeingDefined; } |
3259 | |
3260 | /// True if this tag declaration is "embedded" (i.e., defined or declared |
3261 | /// for the very first time) in the syntax of a declarator. |
3262 | bool isEmbeddedInDeclarator() const { |
3263 | return TagDeclBits.IsEmbeddedInDeclarator; |
3264 | } |
3265 | |
3266 | /// True if this tag declaration is "embedded" (i.e., defined or declared |
3267 | /// for the very first time) in the syntax of a declarator. |
3268 | void setEmbeddedInDeclarator(bool isInDeclarator) { |
3269 | TagDeclBits.IsEmbeddedInDeclarator = isInDeclarator; |
3270 | } |
3271 | |
3272 | /// True if this tag is free standing, e.g. "struct foo;". |
3273 | bool isFreeStanding() const { return TagDeclBits.IsFreeStanding; } |
3274 | |
3275 | /// True if this tag is free standing, e.g. "struct foo;". |
3276 | void setFreeStanding(bool isFreeStanding = true) { |
3277 | TagDeclBits.IsFreeStanding = isFreeStanding; |
3278 | } |
3279 | |
3280 | /// Indicates whether it is possible for declarations of this kind |
3281 | /// to have an out-of-date definition. |
3282 | /// |
3283 | /// This option is only enabled when modules are enabled. |
3284 | bool mayHaveOutOfDateDef() const { return TagDeclBits.MayHaveOutOfDateDef; } |
3285 | |
3286 | /// Whether this declaration declares a type that is |
3287 | /// dependent, i.e., a type that somehow depends on template |
3288 | /// parameters. |
3289 | bool isDependentType() const { return isDependentContext(); } |
3290 | |
3291 | /// Starts the definition of this tag declaration. |
3292 | /// |
3293 | /// This method should be invoked at the beginning of the definition |
3294 | /// of this tag declaration. It will set the tag type into a state |
3295 | /// where it is in the process of being defined. |
3296 | void startDefinition(); |
3297 | |
3298 | /// Returns the TagDecl that actually defines this |
3299 | /// struct/union/class/enum. When determining whether or not a |
3300 | /// struct/union/class/enum has a definition, one should use this |
3301 | /// method as opposed to 'isDefinition'. 'isDefinition' indicates |
3302 | /// whether or not a specific TagDecl is defining declaration, not |
3303 | /// whether or not the struct/union/class/enum type is defined. |
3304 | /// This method returns NULL if there is no TagDecl that defines |
3305 | /// the struct/union/class/enum. |
3306 | TagDecl *getDefinition() const; |
3307 | |
3308 | StringRef getKindName() const { |
3309 | return TypeWithKeyword::getTagTypeKindName(getTagKind()); |
3310 | } |
3311 | |
3312 | TagKind getTagKind() const { |
3313 | return static_cast<TagKind>(TagDeclBits.TagDeclKind); |
3314 | } |
3315 | |
3316 | void setTagKind(TagKind TK) { TagDeclBits.TagDeclKind = TK; } |
3317 | |
3318 | bool isStruct() const { return getTagKind() == TTK_Struct; } |
3319 | bool isInterface() const { return getTagKind() == TTK_Interface; } |
3320 | bool isClass() const { return getTagKind() == TTK_Class; } |
3321 | bool isUnion() const { return getTagKind() == TTK_Union; } |
3322 | bool isEnum() const { return getTagKind() == TTK_Enum; } |
3323 | |
3324 | /// Is this tag type named, either directly or via being defined in |
3325 | /// a typedef of this type? |
3326 | /// |
3327 | /// C++11 [basic.link]p8: |
3328 | /// A type is said to have linkage if and only if: |
3329 | /// - it is a class or enumeration type that is named (or has a |
3330 | /// name for linkage purposes) and the name has linkage; ... |
3331 | /// C++11 [dcl.typedef]p9: |
3332 | /// If the typedef declaration defines an unnamed class (or enum), |
3333 | /// the first typedef-name declared by the declaration to be that |
3334 | /// class type (or enum type) is used to denote the class type (or |
3335 | /// enum type) for linkage purposes only. |
3336 | /// |
3337 | /// C does not have an analogous rule, but the same concept is |
3338 | /// nonetheless useful in some places. |
3339 | bool hasNameForLinkage() const { |
3340 | return (getDeclName() || getTypedefNameForAnonDecl()); |
3341 | } |
3342 | |
3343 | TypedefNameDecl *getTypedefNameForAnonDecl() const { |
3344 | return hasExtInfo() ? nullptr |
3345 | : TypedefNameDeclOrQualifier.get<TypedefNameDecl *>(); |
3346 | } |
3347 | |
3348 | void setTypedefNameForAnonDecl(TypedefNameDecl *TDD); |
3349 | |
3350 | /// Retrieve the nested-name-specifier that qualifies the name of this |
3351 | /// declaration, if it was present in the source. |
3352 | NestedNameSpecifier *getQualifier() const { |
3353 | return hasExtInfo() ? getExtInfo()->QualifierLoc.getNestedNameSpecifier() |
3354 | : nullptr; |
3355 | } |
3356 | |
3357 | /// Retrieve the nested-name-specifier (with source-location |
3358 | /// information) that qualifies the name of this declaration, if it was |
3359 | /// present in the source. |
3360 | NestedNameSpecifierLoc getQualifierLoc() const { |
3361 | return hasExtInfo() ? getExtInfo()->QualifierLoc |
3362 | : NestedNameSpecifierLoc(); |
3363 | } |
3364 | |
3365 | void setQualifierInfo(NestedNameSpecifierLoc QualifierLoc); |
3366 | |
3367 | unsigned getNumTemplateParameterLists() const { |
3368 | return hasExtInfo() ? getExtInfo()->NumTemplParamLists : 0; |
3369 | } |
3370 | |
3371 | TemplateParameterList *getTemplateParameterList(unsigned i) const { |
3372 | assert(i < getNumTemplateParameterLists())((i < getNumTemplateParameterLists()) ? static_cast<void > (0) : __assert_fail ("i < getNumTemplateParameterLists()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 3372, __PRETTY_FUNCTION__)); |
3373 | return getExtInfo()->TemplParamLists[i]; |
3374 | } |
3375 | |
3376 | void setTemplateParameterListsInfo(ASTContext &Context, |
3377 | ArrayRef<TemplateParameterList *> TPLists); |
3378 | |
3379 | // Implement isa/cast/dyncast/etc. |
3380 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3381 | static bool classofKind(Kind K) { return K >= firstTag && K <= lastTag; } |
3382 | |
3383 | static DeclContext *castToDeclContext(const TagDecl *D) { |
3384 | return static_cast<DeclContext *>(const_cast<TagDecl*>(D)); |
3385 | } |
3386 | |
3387 | static TagDecl *castFromDeclContext(const DeclContext *DC) { |
3388 | return static_cast<TagDecl *>(const_cast<DeclContext*>(DC)); |
3389 | } |
3390 | }; |
3391 | |
3392 | /// Represents an enum. In C++11, enums can be forward-declared |
3393 | /// with a fixed underlying type, and in C we allow them to be forward-declared |
3394 | /// with no underlying type as an extension. |
3395 | class EnumDecl : public TagDecl { |
3396 | // This class stores some data in DeclContext::EnumDeclBits |
3397 | // to save some space. Use the provided accessors to access it. |
3398 | |
3399 | /// This represent the integer type that the enum corresponds |
3400 | /// to for code generation purposes. Note that the enumerator constants may |
3401 | /// have a different type than this does. |
3402 | /// |
3403 | /// If the underlying integer type was explicitly stated in the source |
3404 | /// code, this is a TypeSourceInfo* for that type. Otherwise this type |
3405 | /// was automatically deduced somehow, and this is a Type*. |
3406 | /// |
3407 | /// Normally if IsFixed(), this would contain a TypeSourceInfo*, but in |
3408 | /// some cases it won't. |
3409 | /// |
3410 | /// The underlying type of an enumeration never has any qualifiers, so |
3411 | /// we can get away with just storing a raw Type*, and thus save an |
3412 | /// extra pointer when TypeSourceInfo is needed. |
3413 | llvm::PointerUnion<const Type *, TypeSourceInfo *> IntegerType; |
3414 | |
3415 | /// The integer type that values of this type should |
3416 | /// promote to. In C, enumerators are generally of an integer type |
3417 | /// directly, but gcc-style large enumerators (and all enumerators |
3418 | /// in C++) are of the enum type instead. |
3419 | QualType PromotionType; |
3420 | |
3421 | /// If this enumeration is an instantiation of a member enumeration |
3422 | /// of a class template specialization, this is the member specialization |
3423 | /// information. |
3424 | MemberSpecializationInfo *SpecializationInfo = nullptr; |
3425 | |
3426 | /// Store the ODRHash after first calculation. |
3427 | /// The corresponding flag HasODRHash is in EnumDeclBits |
3428 | /// and can be accessed with the provided accessors. |
3429 | unsigned ODRHash; |
3430 | |
3431 | EnumDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc, |
3432 | SourceLocation IdLoc, IdentifierInfo *Id, EnumDecl *PrevDecl, |
3433 | bool Scoped, bool ScopedUsingClassTag, bool Fixed); |
3434 | |
3435 | void anchor() override; |
3436 | |
3437 | void setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED, |
3438 | TemplateSpecializationKind TSK); |
3439 | |
3440 | /// Sets the width in bits required to store all the |
3441 | /// non-negative enumerators of this enum. |
3442 | void setNumPositiveBits(unsigned Num) { |
3443 | EnumDeclBits.NumPositiveBits = Num; |
3444 | assert(EnumDeclBits.NumPositiveBits == Num && "can't store this bitcount")((EnumDeclBits.NumPositiveBits == Num && "can't store this bitcount" ) ? static_cast<void> (0) : __assert_fail ("EnumDeclBits.NumPositiveBits == Num && \"can't store this bitcount\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 3444, __PRETTY_FUNCTION__)); |
3445 | } |
3446 | |
3447 | /// Returns the width in bits required to store all the |
3448 | /// negative enumerators of this enum. (see getNumNegativeBits) |
3449 | void setNumNegativeBits(unsigned Num) { EnumDeclBits.NumNegativeBits = Num; } |
3450 | |
3451 | /// True if this tag declaration is a scoped enumeration. Only |
3452 | /// possible in C++11 mode. |
3453 | void setScoped(bool Scoped = true) { EnumDeclBits.IsScoped = Scoped; } |
3454 | |
3455 | /// If this tag declaration is a scoped enum, |
3456 | /// then this is true if the scoped enum was declared using the class |
3457 | /// tag, false if it was declared with the struct tag. No meaning is |
3458 | /// associated if this tag declaration is not a scoped enum. |
3459 | void setScopedUsingClassTag(bool ScopedUCT = true) { |
3460 | EnumDeclBits.IsScopedUsingClassTag = ScopedUCT; |
3461 | } |
3462 | |
3463 | /// True if this is an Objective-C, C++11, or |
3464 | /// Microsoft-style enumeration with a fixed underlying type. |
3465 | void setFixed(bool Fixed = true) { EnumDeclBits.IsFixed = Fixed; } |
3466 | |
3467 | /// True if a valid hash is stored in ODRHash. |
3468 | bool hasODRHash() const { return EnumDeclBits.HasODRHash; } |
3469 | void setHasODRHash(bool Hash = true) { EnumDeclBits.HasODRHash = Hash; } |
3470 | |
3471 | public: |
3472 | friend class ASTDeclReader; |
3473 | |
3474 | EnumDecl *getCanonicalDecl() override { |
3475 | return cast<EnumDecl>(TagDecl::getCanonicalDecl()); |
3476 | } |
3477 | const EnumDecl *getCanonicalDecl() const { |
3478 | return const_cast<EnumDecl*>(this)->getCanonicalDecl(); |
3479 | } |
3480 | |
3481 | EnumDecl *getPreviousDecl() { |
3482 | return cast_or_null<EnumDecl>( |
3483 | static_cast<TagDecl *>(this)->getPreviousDecl()); |
3484 | } |
3485 | const EnumDecl *getPreviousDecl() const { |
3486 | return const_cast<EnumDecl*>(this)->getPreviousDecl(); |
3487 | } |
3488 | |
3489 | EnumDecl *getMostRecentDecl() { |
3490 | return cast<EnumDecl>(static_cast<TagDecl *>(this)->getMostRecentDecl()); |
3491 | } |
3492 | const EnumDecl *getMostRecentDecl() const { |
3493 | return const_cast<EnumDecl*>(this)->getMostRecentDecl(); |
3494 | } |
3495 | |
3496 | EnumDecl *getDefinition() const { |
3497 | return cast_or_null<EnumDecl>(TagDecl::getDefinition()); |
3498 | } |
3499 | |
3500 | static EnumDecl *Create(ASTContext &C, DeclContext *DC, |
3501 | SourceLocation StartLoc, SourceLocation IdLoc, |
3502 | IdentifierInfo *Id, EnumDecl *PrevDecl, |
3503 | bool IsScoped, bool IsScopedUsingClassTag, |
3504 | bool IsFixed); |
3505 | static EnumDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3506 | |
3507 | /// When created, the EnumDecl corresponds to a |
3508 | /// forward-declared enum. This method is used to mark the |
3509 | /// declaration as being defined; its enumerators have already been |
3510 | /// added (via DeclContext::addDecl). NewType is the new underlying |
3511 | /// type of the enumeration type. |
3512 | void completeDefinition(QualType NewType, |
3513 | QualType PromotionType, |
3514 | unsigned NumPositiveBits, |
3515 | unsigned NumNegativeBits); |
3516 | |
3517 | // Iterates through the enumerators of this enumeration. |
3518 | using enumerator_iterator = specific_decl_iterator<EnumConstantDecl>; |
3519 | using enumerator_range = |
3520 | llvm::iterator_range<specific_decl_iterator<EnumConstantDecl>>; |
3521 | |
3522 | enumerator_range enumerators() const { |
3523 | return enumerator_range(enumerator_begin(), enumerator_end()); |
3524 | } |
3525 | |
3526 | enumerator_iterator enumerator_begin() const { |
3527 | const EnumDecl *E = getDefinition(); |
3528 | if (!E) |
3529 | E = this; |
3530 | return enumerator_iterator(E->decls_begin()); |
3531 | } |
3532 | |
3533 | enumerator_iterator enumerator_end() const { |
3534 | const EnumDecl *E = getDefinition(); |
3535 | if (!E) |
3536 | E = this; |
3537 | return enumerator_iterator(E->decls_end()); |
3538 | } |
3539 | |
3540 | /// Return the integer type that enumerators should promote to. |
3541 | QualType getPromotionType() const { return PromotionType; } |
3542 | |
3543 | /// Set the promotion type. |
3544 | void setPromotionType(QualType T) { PromotionType = T; } |
3545 | |
3546 | /// Return the integer type this enum decl corresponds to. |
3547 | /// This returns a null QualType for an enum forward definition with no fixed |
3548 | /// underlying type. |
3549 | QualType getIntegerType() const { |
3550 | if (!IntegerType) |
3551 | return QualType(); |
3552 | if (const Type *T = IntegerType.dyn_cast<const Type*>()) |
3553 | return QualType(T, 0); |
3554 | return IntegerType.get<TypeSourceInfo*>()->getType().getUnqualifiedType(); |
3555 | } |
3556 | |
3557 | /// Set the underlying integer type. |
3558 | void setIntegerType(QualType T) { IntegerType = T.getTypePtrOrNull(); } |
3559 | |
3560 | /// Set the underlying integer type source info. |
3561 | void setIntegerTypeSourceInfo(TypeSourceInfo *TInfo) { IntegerType = TInfo; } |
3562 | |
3563 | /// Return the type source info for the underlying integer type, |
3564 | /// if no type source info exists, return 0. |
3565 | TypeSourceInfo *getIntegerTypeSourceInfo() const { |
3566 | return IntegerType.dyn_cast<TypeSourceInfo*>(); |
3567 | } |
3568 | |
3569 | /// Retrieve the source range that covers the underlying type if |
3570 | /// specified. |
3571 | SourceRange getIntegerTypeRange() const LLVM_READONLY__attribute__((__pure__)); |
3572 | |
3573 | /// Returns the width in bits required to store all the |
3574 | /// non-negative enumerators of this enum. |
3575 | unsigned getNumPositiveBits() const { return EnumDeclBits.NumPositiveBits; } |
3576 | |
3577 | /// Returns the width in bits required to store all the |
3578 | /// negative enumerators of this enum. These widths include |
3579 | /// the rightmost leading 1; that is: |
3580 | /// |
3581 | /// MOST NEGATIVE ENUMERATOR PATTERN NUM NEGATIVE BITS |
3582 | /// ------------------------ ------- ----------------- |
3583 | /// -1 1111111 1 |
3584 | /// -10 1110110 5 |
3585 | /// -101 1001011 8 |
3586 | unsigned getNumNegativeBits() const { return EnumDeclBits.NumNegativeBits; } |
3587 | |
3588 | /// Returns true if this is a C++11 scoped enumeration. |
3589 | bool isScoped() const { return EnumDeclBits.IsScoped; } |
3590 | |
3591 | /// Returns true if this is a C++11 scoped enumeration. |
3592 | bool isScopedUsingClassTag() const { |
3593 | return EnumDeclBits.IsScopedUsingClassTag; |
3594 | } |
3595 | |
3596 | /// Returns true if this is an Objective-C, C++11, or |
3597 | /// Microsoft-style enumeration with a fixed underlying type. |
3598 | bool isFixed() const { return EnumDeclBits.IsFixed; } |
3599 | |
3600 | unsigned getODRHash(); |
3601 | |
3602 | /// Returns true if this can be considered a complete type. |
3603 | bool isComplete() const { |
3604 | // IntegerType is set for fixed type enums and non-fixed but implicitly |
3605 | // int-sized Microsoft enums. |
3606 | return isCompleteDefinition() || IntegerType; |
3607 | } |
3608 | |
3609 | /// Returns true if this enum is either annotated with |
3610 | /// enum_extensibility(closed) or isn't annotated with enum_extensibility. |
3611 | bool isClosed() const; |
3612 | |
3613 | /// Returns true if this enum is annotated with flag_enum and isn't annotated |
3614 | /// with enum_extensibility(open). |
3615 | bool isClosedFlag() const; |
3616 | |
3617 | /// Returns true if this enum is annotated with neither flag_enum nor |
3618 | /// enum_extensibility(open). |
3619 | bool isClosedNonFlag() const; |
3620 | |
3621 | /// Retrieve the enum definition from which this enumeration could |
3622 | /// be instantiated, if it is an instantiation (rather than a non-template). |
3623 | EnumDecl *getTemplateInstantiationPattern() const; |
3624 | |
3625 | /// Returns the enumeration (declared within the template) |
3626 | /// from which this enumeration type was instantiated, or NULL if |
3627 | /// this enumeration was not instantiated from any template. |
3628 | EnumDecl *getInstantiatedFromMemberEnum() const; |
3629 | |
3630 | /// If this enumeration is a member of a specialization of a |
3631 | /// templated class, determine what kind of template specialization |
3632 | /// or instantiation this is. |
3633 | TemplateSpecializationKind getTemplateSpecializationKind() const; |
3634 | |
3635 | /// For an enumeration member that was instantiated from a member |
3636 | /// enumeration of a templated class, set the template specialiation kind. |
3637 | void setTemplateSpecializationKind(TemplateSpecializationKind TSK, |
3638 | SourceLocation PointOfInstantiation = SourceLocation()); |
3639 | |
3640 | /// If this enumeration is an instantiation of a member enumeration of |
3641 | /// a class template specialization, retrieves the member specialization |
3642 | /// information. |
3643 | MemberSpecializationInfo *getMemberSpecializationInfo() const { |
3644 | return SpecializationInfo; |
3645 | } |
3646 | |
3647 | /// Specify that this enumeration is an instantiation of the |
3648 | /// member enumeration ED. |
3649 | void setInstantiationOfMemberEnum(EnumDecl *ED, |
3650 | TemplateSpecializationKind TSK) { |
3651 | setInstantiationOfMemberEnum(getASTContext(), ED, TSK); |
3652 | } |
3653 | |
3654 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3655 | static bool classofKind(Kind K) { return K == Enum; } |
3656 | }; |
3657 | |
3658 | /// Represents a struct/union/class. For example: |
3659 | /// struct X; // Forward declaration, no "body". |
3660 | /// union Y { int A, B; }; // Has body with members A and B (FieldDecls). |
3661 | /// This decl will be marked invalid if *any* members are invalid. |
3662 | class RecordDecl : public TagDecl { |
3663 | // This class stores some data in DeclContext::RecordDeclBits |
3664 | // to save some space. Use the provided accessors to access it. |
3665 | public: |
3666 | friend class DeclContext; |
3667 | /// Enum that represents the different ways arguments are passed to and |
3668 | /// returned from function calls. This takes into account the target-specific |
3669 | /// and version-specific rules along with the rules determined by the |
3670 | /// language. |
3671 | enum ArgPassingKind : unsigned { |
3672 | /// The argument of this type can be passed directly in registers. |
3673 | APK_CanPassInRegs, |
3674 | |
3675 | /// The argument of this type cannot be passed directly in registers. |
3676 | /// Records containing this type as a subobject are not forced to be passed |
3677 | /// indirectly. This value is used only in C++. This value is required by |
3678 | /// C++ because, in uncommon situations, it is possible for a class to have |
3679 | /// only trivial copy/move constructors even when one of its subobjects has |
3680 | /// a non-trivial copy/move constructor (if e.g. the corresponding copy/move |
3681 | /// constructor in the derived class is deleted). |
3682 | APK_CannotPassInRegs, |
3683 | |
3684 | /// The argument of this type cannot be passed directly in registers. |
3685 | /// Records containing this type as a subobject are forced to be passed |
3686 | /// indirectly. |
3687 | APK_CanNeverPassInRegs |
3688 | }; |
3689 | |
3690 | protected: |
3691 | RecordDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC, |
3692 | SourceLocation StartLoc, SourceLocation IdLoc, |
3693 | IdentifierInfo *Id, RecordDecl *PrevDecl); |
3694 | |
3695 | public: |
3696 | static RecordDecl *Create(const ASTContext &C, TagKind TK, DeclContext *DC, |
3697 | SourceLocation StartLoc, SourceLocation IdLoc, |
3698 | IdentifierInfo *Id, RecordDecl* PrevDecl = nullptr); |
3699 | static RecordDecl *CreateDeserialized(const ASTContext &C, unsigned ID); |
3700 | |
3701 | RecordDecl *getPreviousDecl() { |
3702 | return cast_or_null<RecordDecl>( |
3703 | static_cast<TagDecl *>(this)->getPreviousDecl()); |
3704 | } |
3705 | const RecordDecl *getPreviousDecl() const { |
3706 | return const_cast<RecordDecl*>(this)->getPreviousDecl(); |
3707 | } |
3708 | |
3709 | RecordDecl *getMostRecentDecl() { |
3710 | return cast<RecordDecl>(static_cast<TagDecl *>(this)->getMostRecentDecl()); |
3711 | } |
3712 | const RecordDecl *getMostRecentDecl() const { |
3713 | return const_cast<RecordDecl*>(this)->getMostRecentDecl(); |
3714 | } |
3715 | |
3716 | bool hasFlexibleArrayMember() const { |
3717 | return RecordDeclBits.HasFlexibleArrayMember; |
3718 | } |
3719 | |
3720 | void setHasFlexibleArrayMember(bool V) { |
3721 | RecordDeclBits.HasFlexibleArrayMember = V; |
3722 | } |
3723 | |
3724 | /// Whether this is an anonymous struct or union. To be an anonymous |
3725 | /// struct or union, it must have been declared without a name and |
3726 | /// there must be no objects of this type declared, e.g., |
3727 | /// @code |
3728 | /// union { int i; float f; }; |
3729 | /// @endcode |
3730 | /// is an anonymous union but neither of the following are: |
3731 | /// @code |
3732 | /// union X { int i; float f; }; |
3733 | /// union { int i; float f; } obj; |
3734 | /// @endcode |
3735 | bool isAnonymousStructOrUnion() const { |
3736 | return RecordDeclBits.AnonymousStructOrUnion; |
3737 | } |
3738 | |
3739 | void setAnonymousStructOrUnion(bool Anon) { |
3740 | RecordDeclBits.AnonymousStructOrUnion = Anon; |
3741 | } |
3742 | |
3743 | bool hasObjectMember() const { return RecordDeclBits.HasObjectMember; } |
3744 | void setHasObjectMember(bool val) { RecordDeclBits.HasObjectMember = val; } |
3745 | |
3746 | bool hasVolatileMember() const { return RecordDeclBits.HasVolatileMember; } |
3747 | |
3748 | void setHasVolatileMember(bool val) { |
3749 | RecordDeclBits.HasVolatileMember = val; |
3750 | } |
3751 | |
3752 | bool hasLoadedFieldsFromExternalStorage() const { |
3753 | return RecordDeclBits.LoadedFieldsFromExternalStorage; |
3754 | } |
3755 | |
3756 | void setHasLoadedFieldsFromExternalStorage(bool val) const { |
3757 | RecordDeclBits.LoadedFieldsFromExternalStorage = val; |
3758 | } |
3759 | |
3760 | /// Functions to query basic properties of non-trivial C structs. |
3761 | bool isNonTrivialToPrimitiveDefaultInitialize() const { |
3762 | return RecordDeclBits.NonTrivialToPrimitiveDefaultInitialize; |
3763 | } |
3764 | |
3765 | void setNonTrivialToPrimitiveDefaultInitialize(bool V) { |
3766 | RecordDeclBits.NonTrivialToPrimitiveDefaultInitialize = V; |
3767 | } |
3768 | |
3769 | bool isNonTrivialToPrimitiveCopy() const { |
3770 | return RecordDeclBits.NonTrivialToPrimitiveCopy; |
3771 | } |
3772 | |
3773 | void setNonTrivialToPrimitiveCopy(bool V) { |
3774 | RecordDeclBits.NonTrivialToPrimitiveCopy = V; |
3775 | } |
3776 | |
3777 | bool isNonTrivialToPrimitiveDestroy() const { |
3778 | return RecordDeclBits.NonTrivialToPrimitiveDestroy; |
3779 | } |
3780 | |
3781 | void setNonTrivialToPrimitiveDestroy(bool V) { |
3782 | RecordDeclBits.NonTrivialToPrimitiveDestroy = V; |
3783 | } |
3784 | |
3785 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { |
3786 | return RecordDeclBits.HasNonTrivialToPrimitiveDefaultInitializeCUnion; |
3787 | } |
3788 | |
3789 | void setHasNonTrivialToPrimitiveDefaultInitializeCUnion(bool V) { |
3790 | RecordDeclBits.HasNonTrivialToPrimitiveDefaultInitializeCUnion = V; |
3791 | } |
3792 | |
3793 | bool hasNonTrivialToPrimitiveDestructCUnion() const { |
3794 | return RecordDeclBits.HasNonTrivialToPrimitiveDestructCUnion; |
3795 | } |
3796 | |
3797 | void setHasNonTrivialToPrimitiveDestructCUnion(bool V) { |
3798 | RecordDeclBits.HasNonTrivialToPrimitiveDestructCUnion = V; |
3799 | } |
3800 | |
3801 | bool hasNonTrivialToPrimitiveCopyCUnion() const { |
3802 | return RecordDeclBits.HasNonTrivialToPrimitiveCopyCUnion; |
3803 | } |
3804 | |
3805 | void setHasNonTrivialToPrimitiveCopyCUnion(bool V) { |
3806 | RecordDeclBits.HasNonTrivialToPrimitiveCopyCUnion = V; |
3807 | } |
3808 | |
3809 | /// Determine whether this class can be passed in registers. In C++ mode, |
3810 | /// it must have at least one trivial, non-deleted copy or move constructor. |
3811 | /// FIXME: This should be set as part of completeDefinition. |
3812 | bool canPassInRegisters() const { |
3813 | return getArgPassingRestrictions() == APK_CanPassInRegs; |
3814 | } |
3815 | |
3816 | ArgPassingKind getArgPassingRestrictions() const { |
3817 | return static_cast<ArgPassingKind>(RecordDeclBits.ArgPassingRestrictions); |
3818 | } |
3819 | |
3820 | void setArgPassingRestrictions(ArgPassingKind Kind) { |
3821 | RecordDeclBits.ArgPassingRestrictions = Kind; |
3822 | } |
3823 | |
3824 | bool isParamDestroyedInCallee() const { |
3825 | return RecordDeclBits.ParamDestroyedInCallee; |
3826 | } |
3827 | |
3828 | void setParamDestroyedInCallee(bool V) { |
3829 | RecordDeclBits.ParamDestroyedInCallee = V; |
3830 | } |
3831 | |
3832 | /// Determines whether this declaration represents the |
3833 | /// injected class name. |
3834 | /// |
3835 | /// The injected class name in C++ is the name of the class that |
3836 | /// appears inside the class itself. For example: |
3837 | /// |
3838 | /// \code |
3839 | /// struct C { |
3840 | /// // C is implicitly declared here as a synonym for the class name. |
3841 | /// }; |
3842 | /// |
3843 | /// C::C c; // same as "C c;" |
3844 | /// \endcode |
3845 | bool isInjectedClassName() const; |
3846 | |
3847 | /// Determine whether this record is a class describing a lambda |
3848 | /// function object. |
3849 | bool isLambda() const; |
3850 | |
3851 | /// Determine whether this record is a record for captured variables in |
3852 | /// CapturedStmt construct. |
3853 | bool isCapturedRecord() const; |
3854 | |
3855 | /// Mark the record as a record for captured variables in CapturedStmt |
3856 | /// construct. |
3857 | void setCapturedRecord(); |
3858 | |
3859 | /// Returns the RecordDecl that actually defines |
3860 | /// this struct/union/class. When determining whether or not a |
3861 | /// struct/union/class is completely defined, one should use this |
3862 | /// method as opposed to 'isCompleteDefinition'. |
3863 | /// 'isCompleteDefinition' indicates whether or not a specific |
3864 | /// RecordDecl is a completed definition, not whether or not the |
3865 | /// record type is defined. This method returns NULL if there is |
3866 | /// no RecordDecl that defines the struct/union/tag. |
3867 | RecordDecl *getDefinition() const { |
3868 | return cast_or_null<RecordDecl>(TagDecl::getDefinition()); |
3869 | } |
3870 | |
3871 | // Iterator access to field members. The field iterator only visits |
3872 | // the non-static data members of this class, ignoring any static |
3873 | // data members, functions, constructors, destructors, etc. |
3874 | using field_iterator = specific_decl_iterator<FieldDecl>; |
3875 | using field_range = llvm::iterator_range<specific_decl_iterator<FieldDecl>>; |
3876 | |
3877 | field_range fields() const { return field_range(field_begin(), field_end()); } |
3878 | field_iterator field_begin() const; |
3879 | |
3880 | field_iterator field_end() const { |
3881 | return field_iterator(decl_iterator()); |
3882 | } |
3883 | |
3884 | // Whether there are any fields (non-static data members) in this record. |
3885 | bool field_empty() const { |
3886 | return field_begin() == field_end(); |
3887 | } |
3888 | |
3889 | /// Note that the definition of this type is now complete. |
3890 | virtual void completeDefinition(); |
3891 | |
3892 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3893 | static bool classofKind(Kind K) { |
3894 | return K >= firstRecord && K <= lastRecord; |
3895 | } |
3896 | |
3897 | /// Get whether or not this is an ms_struct which can |
3898 | /// be turned on with an attribute, pragma, or -mms-bitfields |
3899 | /// commandline option. |
3900 | bool isMsStruct(const ASTContext &C) const; |
3901 | |
3902 | /// Whether we are allowed to insert extra padding between fields. |
3903 | /// These padding are added to help AddressSanitizer detect |
3904 | /// intra-object-overflow bugs. |
3905 | bool mayInsertExtraPadding(bool EmitRemark = false) const; |
3906 | |
3907 | /// Finds the first data member which has a name. |
3908 | /// nullptr is returned if no named data member exists. |
3909 | const FieldDecl *findFirstNamedDataMember() const; |
3910 | |
3911 | private: |
3912 | /// Deserialize just the fields. |
3913 | void LoadFieldsFromExternalStorage() const; |
3914 | }; |
3915 | |
3916 | class FileScopeAsmDecl : public Decl { |
3917 | StringLiteral *AsmString; |
3918 | SourceLocation RParenLoc; |
3919 | |
3920 | FileScopeAsmDecl(DeclContext *DC, StringLiteral *asmstring, |
3921 | SourceLocation StartL, SourceLocation EndL) |
3922 | : Decl(FileScopeAsm, DC, StartL), AsmString(asmstring), RParenLoc(EndL) {} |
3923 | |
3924 | virtual void anchor(); |
3925 | |
3926 | public: |
3927 | static FileScopeAsmDecl *Create(ASTContext &C, DeclContext *DC, |
3928 | StringLiteral *Str, SourceLocation AsmLoc, |
3929 | SourceLocation RParenLoc); |
3930 | |
3931 | static FileScopeAsmDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
3932 | |
3933 | SourceLocation getAsmLoc() const { return getLocation(); } |
3934 | SourceLocation getRParenLoc() const { return RParenLoc; } |
3935 | void setRParenLoc(SourceLocation L) { RParenLoc = L; } |
3936 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
3937 | return SourceRange(getAsmLoc(), getRParenLoc()); |
3938 | } |
3939 | |
3940 | const StringLiteral *getAsmString() const { return AsmString; } |
3941 | StringLiteral *getAsmString() { return AsmString; } |
3942 | void setAsmString(StringLiteral *Asm) { AsmString = Asm; } |
3943 | |
3944 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
3945 | static bool classofKind(Kind K) { return K == FileScopeAsm; } |
3946 | }; |
3947 | |
3948 | /// Represents a block literal declaration, which is like an |
3949 | /// unnamed FunctionDecl. For example: |
3950 | /// ^{ statement-body } or ^(int arg1, float arg2){ statement-body } |
3951 | class BlockDecl : public Decl, public DeclContext { |
3952 | // This class stores some data in DeclContext::BlockDeclBits |
3953 | // to save some space. Use the provided accessors to access it. |
3954 | public: |
3955 | /// A class which contains all the information about a particular |
3956 | /// captured value. |
3957 | class Capture { |
3958 | enum { |
3959 | flag_isByRef = 0x1, |
3960 | flag_isNested = 0x2 |
3961 | }; |
3962 | |
3963 | /// The variable being captured. |
3964 | llvm::PointerIntPair<VarDecl*, 2> VariableAndFlags; |
3965 | |
3966 | /// The copy expression, expressed in terms of a DeclRef (or |
3967 | /// BlockDeclRef) to the captured variable. Only required if the |
3968 | /// variable has a C++ class type. |
3969 | Expr *CopyExpr; |
3970 | |
3971 | public: |
3972 | Capture(VarDecl *variable, bool byRef, bool nested, Expr *copy) |
3973 | : VariableAndFlags(variable, |
3974 | (byRef ? flag_isByRef : 0) | (nested ? flag_isNested : 0)), |
3975 | CopyExpr(copy) {} |
3976 | |
3977 | /// The variable being captured. |
3978 | VarDecl *getVariable() const { return VariableAndFlags.getPointer(); } |
3979 | |
3980 | /// Whether this is a "by ref" capture, i.e. a capture of a __block |
3981 | /// variable. |
3982 | bool isByRef() const { return VariableAndFlags.getInt() & flag_isByRef; } |
3983 | |
3984 | bool isEscapingByref() const { |
3985 | return getVariable()->isEscapingByref(); |
3986 | } |
3987 | |
3988 | bool isNonEscapingByref() const { |
3989 | return getVariable()->isNonEscapingByref(); |
3990 | } |
3991 | |
3992 | /// Whether this is a nested capture, i.e. the variable captured |
3993 | /// is not from outside the immediately enclosing function/block. |
3994 | bool isNested() const { return VariableAndFlags.getInt() & flag_isNested; } |
3995 | |
3996 | bool hasCopyExpr() const { return CopyExpr != nullptr; } |
3997 | Expr *getCopyExpr() const { return CopyExpr; } |
3998 | void setCopyExpr(Expr *e) { CopyExpr = e; } |
3999 | }; |
4000 | |
4001 | private: |
4002 | /// A new[]'d array of pointers to ParmVarDecls for the formal |
4003 | /// parameters of this function. This is null if a prototype or if there are |
4004 | /// no formals. |
4005 | ParmVarDecl **ParamInfo = nullptr; |
4006 | unsigned NumParams = 0; |
4007 | |
4008 | Stmt *Body = nullptr; |
4009 | TypeSourceInfo *SignatureAsWritten = nullptr; |
4010 | |
4011 | const Capture *Captures = nullptr; |
4012 | unsigned NumCaptures = 0; |
4013 | |
4014 | unsigned ManglingNumber = 0; |
4015 | Decl *ManglingContextDecl = nullptr; |
4016 | |
4017 | protected: |
4018 | BlockDecl(DeclContext *DC, SourceLocation CaretLoc); |
4019 | |
4020 | public: |
4021 | static BlockDecl *Create(ASTContext &C, DeclContext *DC, SourceLocation L); |
4022 | static BlockDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4023 | |
4024 | SourceLocation getCaretLocation() const { return getLocation(); } |
4025 | |
4026 | bool isVariadic() const { return BlockDeclBits.IsVariadic; } |
4027 | void setIsVariadic(bool value) { BlockDeclBits.IsVariadic = value; } |
4028 | |
4029 | CompoundStmt *getCompoundBody() const { return (CompoundStmt*) Body; } |
4030 | Stmt *getBody() const override { return (Stmt*) Body; } |
4031 | void setBody(CompoundStmt *B) { Body = (Stmt*) B; } |
4032 | |
4033 | void setSignatureAsWritten(TypeSourceInfo *Sig) { SignatureAsWritten = Sig; } |
4034 | TypeSourceInfo *getSignatureAsWritten() const { return SignatureAsWritten; } |
4035 | |
4036 | // ArrayRef access to formal parameters. |
4037 | ArrayRef<ParmVarDecl *> parameters() const { |
4038 | return {ParamInfo, getNumParams()}; |
4039 | } |
4040 | MutableArrayRef<ParmVarDecl *> parameters() { |
4041 | return {ParamInfo, getNumParams()}; |
4042 | } |
4043 | |
4044 | // Iterator access to formal parameters. |
4045 | using param_iterator = MutableArrayRef<ParmVarDecl *>::iterator; |
4046 | using param_const_iterator = ArrayRef<ParmVarDecl *>::const_iterator; |
4047 | |
4048 | bool param_empty() const { return parameters().empty(); } |
4049 | param_iterator param_begin() { return parameters().begin(); } |
4050 | param_iterator param_end() { return parameters().end(); } |
4051 | param_const_iterator param_begin() const { return parameters().begin(); } |
4052 | param_const_iterator param_end() const { return parameters().end(); } |
4053 | size_t param_size() const { return parameters().size(); } |
4054 | |
4055 | unsigned getNumParams() const { return NumParams; } |
4056 | |
4057 | const ParmVarDecl *getParamDecl(unsigned i) const { |
4058 | assert(i < getNumParams() && "Illegal param #")((i < getNumParams() && "Illegal param #") ? static_cast <void> (0) : __assert_fail ("i < getNumParams() && \"Illegal param #\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4058, __PRETTY_FUNCTION__)); |
4059 | return ParamInfo[i]; |
4060 | } |
4061 | ParmVarDecl *getParamDecl(unsigned i) { |
4062 | assert(i < getNumParams() && "Illegal param #")((i < getNumParams() && "Illegal param #") ? static_cast <void> (0) : __assert_fail ("i < getNumParams() && \"Illegal param #\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4062, __PRETTY_FUNCTION__)); |
4063 | return ParamInfo[i]; |
4064 | } |
4065 | |
4066 | void setParams(ArrayRef<ParmVarDecl *> NewParamInfo); |
4067 | |
4068 | /// True if this block (or its nested blocks) captures |
4069 | /// anything of local storage from its enclosing scopes. |
4070 | bool hasCaptures() const { return NumCaptures || capturesCXXThis(); } |
4071 | |
4072 | /// Returns the number of captured variables. |
4073 | /// Does not include an entry for 'this'. |
4074 | unsigned getNumCaptures() const { return NumCaptures; } |
4075 | |
4076 | using capture_const_iterator = ArrayRef<Capture>::const_iterator; |
4077 | |
4078 | ArrayRef<Capture> captures() const { return {Captures, NumCaptures}; } |
4079 | |
4080 | capture_const_iterator capture_begin() const { return captures().begin(); } |
4081 | capture_const_iterator capture_end() const { return captures().end(); } |
4082 | |
4083 | bool capturesCXXThis() const { return BlockDeclBits.CapturesCXXThis; } |
4084 | void setCapturesCXXThis(bool B = true) { BlockDeclBits.CapturesCXXThis = B; } |
4085 | |
4086 | bool blockMissingReturnType() const { |
4087 | return BlockDeclBits.BlockMissingReturnType; |
4088 | } |
4089 | |
4090 | void setBlockMissingReturnType(bool val = true) { |
4091 | BlockDeclBits.BlockMissingReturnType = val; |
4092 | } |
4093 | |
4094 | bool isConversionFromLambda() const { |
4095 | return BlockDeclBits.IsConversionFromLambda; |
4096 | } |
4097 | |
4098 | void setIsConversionFromLambda(bool val = true) { |
4099 | BlockDeclBits.IsConversionFromLambda = val; |
4100 | } |
4101 | |
4102 | bool doesNotEscape() const { return BlockDeclBits.DoesNotEscape; } |
4103 | void setDoesNotEscape(bool B = true) { BlockDeclBits.DoesNotEscape = B; } |
4104 | |
4105 | bool canAvoidCopyToHeap() const { |
4106 | return BlockDeclBits.CanAvoidCopyToHeap; |
4107 | } |
4108 | void setCanAvoidCopyToHeap(bool B = true) { |
4109 | BlockDeclBits.CanAvoidCopyToHeap = B; |
4110 | } |
4111 | |
4112 | bool capturesVariable(const VarDecl *var) const; |
4113 | |
4114 | void setCaptures(ASTContext &Context, ArrayRef<Capture> Captures, |
4115 | bool CapturesCXXThis); |
4116 | |
4117 | unsigned getBlockManglingNumber() const { |
4118 | return ManglingNumber; |
4119 | } |
4120 | |
4121 | Decl *getBlockManglingContextDecl() const { |
4122 | return ManglingContextDecl; |
4123 | } |
4124 | |
4125 | void setBlockMangling(unsigned Number, Decl *Ctx) { |
4126 | ManglingNumber = Number; |
4127 | ManglingContextDecl = Ctx; |
4128 | } |
4129 | |
4130 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
4131 | |
4132 | // Implement isa/cast/dyncast/etc. |
4133 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4134 | static bool classofKind(Kind K) { return K == Block; } |
4135 | static DeclContext *castToDeclContext(const BlockDecl *D) { |
4136 | return static_cast<DeclContext *>(const_cast<BlockDecl*>(D)); |
4137 | } |
4138 | static BlockDecl *castFromDeclContext(const DeclContext *DC) { |
4139 | return static_cast<BlockDecl *>(const_cast<DeclContext*>(DC)); |
4140 | } |
4141 | }; |
4142 | |
4143 | /// Represents the body of a CapturedStmt, and serves as its DeclContext. |
4144 | class CapturedDecl final |
4145 | : public Decl, |
4146 | public DeclContext, |
4147 | private llvm::TrailingObjects<CapturedDecl, ImplicitParamDecl *> { |
4148 | protected: |
4149 | size_t numTrailingObjects(OverloadToken<ImplicitParamDecl>) { |
4150 | return NumParams; |
4151 | } |
4152 | |
4153 | private: |
4154 | /// The number of parameters to the outlined function. |
4155 | unsigned NumParams; |
4156 | |
4157 | /// The position of context parameter in list of parameters. |
4158 | unsigned ContextParam; |
4159 | |
4160 | /// The body of the outlined function. |
4161 | llvm::PointerIntPair<Stmt *, 1, bool> BodyAndNothrow; |
4162 | |
4163 | explicit CapturedDecl(DeclContext *DC, unsigned NumParams); |
4164 | |
4165 | ImplicitParamDecl *const *getParams() const { |
4166 | return getTrailingObjects<ImplicitParamDecl *>(); |
4167 | } |
4168 | |
4169 | ImplicitParamDecl **getParams() { |
4170 | return getTrailingObjects<ImplicitParamDecl *>(); |
4171 | } |
4172 | |
4173 | public: |
4174 | friend class ASTDeclReader; |
4175 | friend class ASTDeclWriter; |
4176 | friend TrailingObjects; |
4177 | |
4178 | static CapturedDecl *Create(ASTContext &C, DeclContext *DC, |
4179 | unsigned NumParams); |
4180 | static CapturedDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
4181 | unsigned NumParams); |
4182 | |
4183 | Stmt *getBody() const override; |
4184 | void setBody(Stmt *B); |
4185 | |
4186 | bool isNothrow() const; |
4187 | void setNothrow(bool Nothrow = true); |
4188 | |
4189 | unsigned getNumParams() const { return NumParams; } |
4190 | |
4191 | ImplicitParamDecl *getParam(unsigned i) const { |
4192 | assert(i < NumParams)((i < NumParams) ? static_cast<void> (0) : __assert_fail ("i < NumParams", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4192, __PRETTY_FUNCTION__)); |
4193 | return getParams()[i]; |
4194 | } |
4195 | void setParam(unsigned i, ImplicitParamDecl *P) { |
4196 | assert(i < NumParams)((i < NumParams) ? static_cast<void> (0) : __assert_fail ("i < NumParams", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4196, __PRETTY_FUNCTION__)); |
4197 | getParams()[i] = P; |
4198 | } |
4199 | |
4200 | // ArrayRef interface to parameters. |
4201 | ArrayRef<ImplicitParamDecl *> parameters() const { |
4202 | return {getParams(), getNumParams()}; |
4203 | } |
4204 | MutableArrayRef<ImplicitParamDecl *> parameters() { |
4205 | return {getParams(), getNumParams()}; |
4206 | } |
4207 | |
4208 | /// Retrieve the parameter containing captured variables. |
4209 | ImplicitParamDecl *getContextParam() const { |
4210 | assert(ContextParam < NumParams)((ContextParam < NumParams) ? static_cast<void> (0) : __assert_fail ("ContextParam < NumParams", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4210, __PRETTY_FUNCTION__)); |
4211 | return getParam(ContextParam); |
4212 | } |
4213 | void setContextParam(unsigned i, ImplicitParamDecl *P) { |
4214 | assert(i < NumParams)((i < NumParams) ? static_cast<void> (0) : __assert_fail ("i < NumParams", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4214, __PRETTY_FUNCTION__)); |
4215 | ContextParam = i; |
4216 | setParam(i, P); |
4217 | } |
4218 | unsigned getContextParamPosition() const { return ContextParam; } |
4219 | |
4220 | using param_iterator = ImplicitParamDecl *const *; |
4221 | using param_range = llvm::iterator_range<param_iterator>; |
4222 | |
4223 | /// Retrieve an iterator pointing to the first parameter decl. |
4224 | param_iterator param_begin() const { return getParams(); } |
4225 | /// Retrieve an iterator one past the last parameter decl. |
4226 | param_iterator param_end() const { return getParams() + NumParams; } |
4227 | |
4228 | // Implement isa/cast/dyncast/etc. |
4229 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4230 | static bool classofKind(Kind K) { return K == Captured; } |
4231 | static DeclContext *castToDeclContext(const CapturedDecl *D) { |
4232 | return static_cast<DeclContext *>(const_cast<CapturedDecl *>(D)); |
4233 | } |
4234 | static CapturedDecl *castFromDeclContext(const DeclContext *DC) { |
4235 | return static_cast<CapturedDecl *>(const_cast<DeclContext *>(DC)); |
4236 | } |
4237 | }; |
4238 | |
4239 | /// Describes a module import declaration, which makes the contents |
4240 | /// of the named module visible in the current translation unit. |
4241 | /// |
4242 | /// An import declaration imports the named module (or submodule). For example: |
4243 | /// \code |
4244 | /// @import std.vector; |
4245 | /// \endcode |
4246 | /// |
4247 | /// Import declarations can also be implicitly generated from |
4248 | /// \#include/\#import directives. |
4249 | class ImportDecl final : public Decl, |
4250 | llvm::TrailingObjects<ImportDecl, SourceLocation> { |
4251 | friend class ASTContext; |
4252 | friend class ASTDeclReader; |
4253 | friend class ASTReader; |
4254 | friend TrailingObjects; |
4255 | |
4256 | /// The imported module, along with a bit that indicates whether |
4257 | /// we have source-location information for each identifier in the module |
4258 | /// name. |
4259 | /// |
4260 | /// When the bit is false, we only have a single source location for the |
4261 | /// end of the import declaration. |
4262 | llvm::PointerIntPair<Module *, 1, bool> ImportedAndComplete; |
4263 | |
4264 | /// The next import in the list of imports local to the translation |
4265 | /// unit being parsed (not loaded from an AST file). |
4266 | ImportDecl *NextLocalImport = nullptr; |
4267 | |
4268 | ImportDecl(DeclContext *DC, SourceLocation StartLoc, Module *Imported, |
4269 | ArrayRef<SourceLocation> IdentifierLocs); |
4270 | |
4271 | ImportDecl(DeclContext *DC, SourceLocation StartLoc, Module *Imported, |
4272 | SourceLocation EndLoc); |
4273 | |
4274 | ImportDecl(EmptyShell Empty) : Decl(Import, Empty) {} |
4275 | |
4276 | public: |
4277 | /// Create a new module import declaration. |
4278 | static ImportDecl *Create(ASTContext &C, DeclContext *DC, |
4279 | SourceLocation StartLoc, Module *Imported, |
4280 | ArrayRef<SourceLocation> IdentifierLocs); |
4281 | |
4282 | /// Create a new module import declaration for an implicitly-generated |
4283 | /// import. |
4284 | static ImportDecl *CreateImplicit(ASTContext &C, DeclContext *DC, |
4285 | SourceLocation StartLoc, Module *Imported, |
4286 | SourceLocation EndLoc); |
4287 | |
4288 | /// Create a new, deserialized module import declaration. |
4289 | static ImportDecl *CreateDeserialized(ASTContext &C, unsigned ID, |
4290 | unsigned NumLocations); |
4291 | |
4292 | /// Retrieve the module that was imported by the import declaration. |
4293 | Module *getImportedModule() const { return ImportedAndComplete.getPointer(); } |
4294 | |
4295 | /// Retrieves the locations of each of the identifiers that make up |
4296 | /// the complete module name in the import declaration. |
4297 | /// |
4298 | /// This will return an empty array if the locations of the individual |
4299 | /// identifiers aren't available. |
4300 | ArrayRef<SourceLocation> getIdentifierLocs() const; |
4301 | |
4302 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)); |
4303 | |
4304 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4305 | static bool classofKind(Kind K) { return K == Import; } |
4306 | }; |
4307 | |
4308 | /// Represents a C++ Modules TS module export declaration. |
4309 | /// |
4310 | /// For example: |
4311 | /// \code |
4312 | /// export void foo(); |
4313 | /// \endcode |
4314 | class ExportDecl final : public Decl, public DeclContext { |
4315 | virtual void anchor(); |
4316 | |
4317 | private: |
4318 | friend class ASTDeclReader; |
4319 | |
4320 | /// The source location for the right brace (if valid). |
4321 | SourceLocation RBraceLoc; |
4322 | |
4323 | ExportDecl(DeclContext *DC, SourceLocation ExportLoc) |
4324 | : Decl(Export, DC, ExportLoc), DeclContext(Export), |
4325 | RBraceLoc(SourceLocation()) {} |
4326 | |
4327 | public: |
4328 | static ExportDecl *Create(ASTContext &C, DeclContext *DC, |
4329 | SourceLocation ExportLoc); |
4330 | static ExportDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4331 | |
4332 | SourceLocation getExportLoc() const { return getLocation(); } |
4333 | SourceLocation getRBraceLoc() const { return RBraceLoc; } |
4334 | void setRBraceLoc(SourceLocation L) { RBraceLoc = L; } |
4335 | |
4336 | bool hasBraces() const { return RBraceLoc.isValid(); } |
4337 | |
4338 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { |
4339 | if (hasBraces()) |
4340 | return RBraceLoc; |
4341 | // No braces: get the end location of the (only) declaration in context |
4342 | // (if present). |
4343 | return decls_empty() ? getLocation() : decls_begin()->getEndLoc(); |
4344 | } |
4345 | |
4346 | SourceRange getSourceRange() const override LLVM_READONLY__attribute__((__pure__)) { |
4347 | return SourceRange(getLocation(), getEndLoc()); |
4348 | } |
4349 | |
4350 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4351 | static bool classofKind(Kind K) { return K == Export; } |
4352 | static DeclContext *castToDeclContext(const ExportDecl *D) { |
4353 | return static_cast<DeclContext *>(const_cast<ExportDecl*>(D)); |
4354 | } |
4355 | static ExportDecl *castFromDeclContext(const DeclContext *DC) { |
4356 | return static_cast<ExportDecl *>(const_cast<DeclContext*>(DC)); |
4357 | } |
4358 | }; |
4359 | |
4360 | /// Represents an empty-declaration. |
4361 | class EmptyDecl : public Decl { |
4362 | EmptyDecl(DeclContext *DC, SourceLocation L) : Decl(Empty, DC, L) {} |
4363 | |
4364 | virtual void anchor(); |
4365 | |
4366 | public: |
4367 | static EmptyDecl *Create(ASTContext &C, DeclContext *DC, |
4368 | SourceLocation L); |
4369 | static EmptyDecl *CreateDeserialized(ASTContext &C, unsigned ID); |
4370 | |
4371 | static bool classof(const Decl *D) { return classofKind(D->getKind()); } |
4372 | static bool classofKind(Kind K) { return K == Empty; } |
4373 | }; |
4374 | |
4375 | /// Insertion operator for diagnostics. This allows sending NamedDecl's |
4376 | /// into a diagnostic with <<. |
4377 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, |
4378 | const NamedDecl* ND) { |
4379 | DB.AddTaggedVal(reinterpret_cast<intptr_t>(ND), |
4380 | DiagnosticsEngine::ak_nameddecl); |
4381 | return DB; |
4382 | } |
4383 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, |
4384 | const NamedDecl* ND) { |
4385 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(ND), |
4386 | DiagnosticsEngine::ak_nameddecl); |
4387 | return PD; |
4388 | } |
4389 | |
4390 | template<typename decl_type> |
4391 | void Redeclarable<decl_type>::setPreviousDecl(decl_type *PrevDecl) { |
4392 | // Note: This routine is implemented here because we need both NamedDecl |
4393 | // and Redeclarable to be defined. |
4394 | assert(RedeclLink.isFirst() &&((RedeclLink.isFirst() && "setPreviousDecl on a decl already in a redeclaration chain" ) ? static_cast<void> (0) : __assert_fail ("RedeclLink.isFirst() && \"setPreviousDecl on a decl already in a redeclaration chain\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4395, __PRETTY_FUNCTION__)) |
4395 | "setPreviousDecl on a decl already in a redeclaration chain")((RedeclLink.isFirst() && "setPreviousDecl on a decl already in a redeclaration chain" ) ? static_cast<void> (0) : __assert_fail ("RedeclLink.isFirst() && \"setPreviousDecl on a decl already in a redeclaration chain\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4395, __PRETTY_FUNCTION__)); |
4396 | |
4397 | if (PrevDecl) { |
4398 | // Point to previous. Make sure that this is actually the most recent |
4399 | // redeclaration, or we can build invalid chains. If the most recent |
4400 | // redeclaration is invalid, it won't be PrevDecl, but we want it anyway. |
4401 | First = PrevDecl->getFirstDecl(); |
4402 | assert(First->RedeclLink.isFirst() && "Expected first")((First->RedeclLink.isFirst() && "Expected first") ? static_cast<void> (0) : __assert_fail ("First->RedeclLink.isFirst() && \"Expected first\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4402, __PRETTY_FUNCTION__)); |
4403 | decl_type *MostRecent = First->getNextRedeclaration(); |
4404 | RedeclLink = PreviousDeclLink(cast<decl_type>(MostRecent)); |
4405 | |
4406 | // If the declaration was previously visible, a redeclaration of it remains |
4407 | // visible even if it wouldn't be visible by itself. |
4408 | static_cast<decl_type*>(this)->IdentifierNamespace |= |
4409 | MostRecent->getIdentifierNamespace() & |
4410 | (Decl::IDNS_Ordinary | Decl::IDNS_Tag | Decl::IDNS_Type); |
4411 | } else { |
4412 | // Make this first. |
4413 | First = static_cast<decl_type*>(this); |
4414 | } |
4415 | |
4416 | // First one will point to this one as latest. |
4417 | First->RedeclLink.setLatest(static_cast<decl_type*>(this)); |
4418 | |
4419 | assert(!isa<NamedDecl>(static_cast<decl_type*>(this)) ||((!isa<NamedDecl>(static_cast<decl_type*>(this)) || cast<NamedDecl>(static_cast<decl_type*>(this))-> isLinkageValid()) ? static_cast<void> (0) : __assert_fail ("!isa<NamedDecl>(static_cast<decl_type*>(this)) || cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4420, __PRETTY_FUNCTION__)) |
4420 | cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid())((!isa<NamedDecl>(static_cast<decl_type*>(this)) || cast<NamedDecl>(static_cast<decl_type*>(this))-> isLinkageValid()) ? static_cast<void> (0) : __assert_fail ("!isa<NamedDecl>(static_cast<decl_type*>(this)) || cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Decl.h" , 4420, __PRETTY_FUNCTION__)); |
4421 | } |
4422 | |
4423 | // Inline function definitions. |
4424 | |
4425 | /// Check if the given decl is complete. |
4426 | /// |
4427 | /// We use this function to break a cycle between the inline definitions in |
4428 | /// Type.h and Decl.h. |
4429 | inline bool IsEnumDeclComplete(EnumDecl *ED) { |
4430 | return ED->isComplete(); |
4431 | } |
4432 | |
4433 | /// Check if the given decl is scoped. |
4434 | /// |
4435 | /// We use this function to break a cycle between the inline definitions in |
4436 | /// Type.h and Decl.h. |
4437 | inline bool IsEnumDeclScoped(EnumDecl *ED) { |
4438 | return ED->isScoped(); |
4439 | } |
4440 | |
4441 | } // namespace clang |
4442 | |
4443 | #endif // LLVM_CLANG_AST_DECL_H |
1 | //===- Type.h - C Language Family Type Representation -----------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | /// \file |
10 | /// C Language Family Type Representation |
11 | /// |
12 | /// This file defines the clang::Type interface and subclasses, used to |
13 | /// represent types for languages in the C family. |
14 | // |
15 | //===----------------------------------------------------------------------===// |
16 | |
17 | #ifndef LLVM_CLANG_AST_TYPE_H |
18 | #define LLVM_CLANG_AST_TYPE_H |
19 | |
20 | #include "clang/AST/NestedNameSpecifier.h" |
21 | #include "clang/AST/TemplateName.h" |
22 | #include "clang/Basic/AddressSpaces.h" |
23 | #include "clang/Basic/AttrKinds.h" |
24 | #include "clang/Basic/Diagnostic.h" |
25 | #include "clang/Basic/ExceptionSpecificationType.h" |
26 | #include "clang/Basic/LLVM.h" |
27 | #include "clang/Basic/Linkage.h" |
28 | #include "clang/Basic/PartialDiagnostic.h" |
29 | #include "clang/Basic/SourceLocation.h" |
30 | #include "clang/Basic/Specifiers.h" |
31 | #include "clang/Basic/Visibility.h" |
32 | #include "llvm/ADT/APInt.h" |
33 | #include "llvm/ADT/APSInt.h" |
34 | #include "llvm/ADT/ArrayRef.h" |
35 | #include "llvm/ADT/FoldingSet.h" |
36 | #include "llvm/ADT/None.h" |
37 | #include "llvm/ADT/Optional.h" |
38 | #include "llvm/ADT/PointerIntPair.h" |
39 | #include "llvm/ADT/PointerUnion.h" |
40 | #include "llvm/ADT/StringRef.h" |
41 | #include "llvm/ADT/Twine.h" |
42 | #include "llvm/ADT/iterator_range.h" |
43 | #include "llvm/Support/Casting.h" |
44 | #include "llvm/Support/Compiler.h" |
45 | #include "llvm/Support/ErrorHandling.h" |
46 | #include "llvm/Support/PointerLikeTypeTraits.h" |
47 | #include "llvm/Support/type_traits.h" |
48 | #include "llvm/Support/TrailingObjects.h" |
49 | #include <cassert> |
50 | #include <cstddef> |
51 | #include <cstdint> |
52 | #include <cstring> |
53 | #include <string> |
54 | #include <type_traits> |
55 | #include <utility> |
56 | |
57 | namespace clang { |
58 | |
59 | class ExtQuals; |
60 | class QualType; |
61 | class TagDecl; |
62 | class Type; |
63 | |
64 | enum { |
65 | TypeAlignmentInBits = 4, |
66 | TypeAlignment = 1 << TypeAlignmentInBits |
67 | }; |
68 | |
69 | } // namespace clang |
70 | |
71 | namespace llvm { |
72 | |
73 | template <typename T> |
74 | struct PointerLikeTypeTraits; |
75 | template<> |
76 | struct PointerLikeTypeTraits< ::clang::Type*> { |
77 | static inline void *getAsVoidPointer(::clang::Type *P) { return P; } |
78 | |
79 | static inline ::clang::Type *getFromVoidPointer(void *P) { |
80 | return static_cast< ::clang::Type*>(P); |
81 | } |
82 | |
83 | enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; |
84 | }; |
85 | |
86 | template<> |
87 | struct PointerLikeTypeTraits< ::clang::ExtQuals*> { |
88 | static inline void *getAsVoidPointer(::clang::ExtQuals *P) { return P; } |
89 | |
90 | static inline ::clang::ExtQuals *getFromVoidPointer(void *P) { |
91 | return static_cast< ::clang::ExtQuals*>(P); |
92 | } |
93 | |
94 | enum { NumLowBitsAvailable = clang::TypeAlignmentInBits }; |
95 | }; |
96 | |
97 | } // namespace llvm |
98 | |
99 | namespace clang { |
100 | |
101 | class ASTContext; |
102 | template <typename> class CanQual; |
103 | class CXXRecordDecl; |
104 | class DeclContext; |
105 | class EnumDecl; |
106 | class Expr; |
107 | class ExtQualsTypeCommonBase; |
108 | class FunctionDecl; |
109 | class IdentifierInfo; |
110 | class NamedDecl; |
111 | class ObjCInterfaceDecl; |
112 | class ObjCProtocolDecl; |
113 | class ObjCTypeParamDecl; |
114 | struct PrintingPolicy; |
115 | class RecordDecl; |
116 | class Stmt; |
117 | class TagDecl; |
118 | class TemplateArgument; |
119 | class TemplateArgumentListInfo; |
120 | class TemplateArgumentLoc; |
121 | class TemplateTypeParmDecl; |
122 | class TypedefNameDecl; |
123 | class UnresolvedUsingTypenameDecl; |
124 | |
125 | using CanQualType = CanQual<Type>; |
126 | |
127 | // Provide forward declarations for all of the *Type classes. |
128 | #define TYPE(Class, Base) class Class##Type; |
129 | #include "clang/AST/TypeNodes.inc" |
130 | |
131 | /// The collection of all-type qualifiers we support. |
132 | /// Clang supports five independent qualifiers: |
133 | /// * C99: const, volatile, and restrict |
134 | /// * MS: __unaligned |
135 | /// * Embedded C (TR18037): address spaces |
136 | /// * Objective C: the GC attributes (none, weak, or strong) |
137 | class Qualifiers { |
138 | public: |
139 | enum TQ { // NOTE: These flags must be kept in sync with DeclSpec::TQ. |
140 | Const = 0x1, |
141 | Restrict = 0x2, |
142 | Volatile = 0x4, |
143 | CVRMask = Const | Volatile | Restrict |
144 | }; |
145 | |
146 | enum GC { |
147 | GCNone = 0, |
148 | Weak, |
149 | Strong |
150 | }; |
151 | |
152 | enum ObjCLifetime { |
153 | /// There is no lifetime qualification on this type. |
154 | OCL_None, |
155 | |
156 | /// This object can be modified without requiring retains or |
157 | /// releases. |
158 | OCL_ExplicitNone, |
159 | |
160 | /// Assigning into this object requires the old value to be |
161 | /// released and the new value to be retained. The timing of the |
162 | /// release of the old value is inexact: it may be moved to |
163 | /// immediately after the last known point where the value is |
164 | /// live. |
165 | OCL_Strong, |
166 | |
167 | /// Reading or writing from this object requires a barrier call. |
168 | OCL_Weak, |
169 | |
170 | /// Assigning into this object requires a lifetime extension. |
171 | OCL_Autoreleasing |
172 | }; |
173 | |
174 | enum { |
175 | /// The maximum supported address space number. |
176 | /// 23 bits should be enough for anyone. |
177 | MaxAddressSpace = 0x7fffffu, |
178 | |
179 | /// The width of the "fast" qualifier mask. |
180 | FastWidth = 3, |
181 | |
182 | /// The fast qualifier mask. |
183 | FastMask = (1 << FastWidth) - 1 |
184 | }; |
185 | |
186 | /// Returns the common set of qualifiers while removing them from |
187 | /// the given sets. |
188 | static Qualifiers removeCommonQualifiers(Qualifiers &L, Qualifiers &R) { |
189 | // If both are only CVR-qualified, bit operations are sufficient. |
190 | if (!(L.Mask & ~CVRMask) && !(R.Mask & ~CVRMask)) { |
191 | Qualifiers Q; |
192 | Q.Mask = L.Mask & R.Mask; |
193 | L.Mask &= ~Q.Mask; |
194 | R.Mask &= ~Q.Mask; |
195 | return Q; |
196 | } |
197 | |
198 | Qualifiers Q; |
199 | unsigned CommonCRV = L.getCVRQualifiers() & R.getCVRQualifiers(); |
200 | Q.addCVRQualifiers(CommonCRV); |
201 | L.removeCVRQualifiers(CommonCRV); |
202 | R.removeCVRQualifiers(CommonCRV); |
203 | |
204 | if (L.getObjCGCAttr() == R.getObjCGCAttr()) { |
205 | Q.setObjCGCAttr(L.getObjCGCAttr()); |
206 | L.removeObjCGCAttr(); |
207 | R.removeObjCGCAttr(); |
208 | } |
209 | |
210 | if (L.getObjCLifetime() == R.getObjCLifetime()) { |
211 | Q.setObjCLifetime(L.getObjCLifetime()); |
212 | L.removeObjCLifetime(); |
213 | R.removeObjCLifetime(); |
214 | } |
215 | |
216 | if (L.getAddressSpace() == R.getAddressSpace()) { |
217 | Q.setAddressSpace(L.getAddressSpace()); |
218 | L.removeAddressSpace(); |
219 | R.removeAddressSpace(); |
220 | } |
221 | return Q; |
222 | } |
223 | |
224 | static Qualifiers fromFastMask(unsigned Mask) { |
225 | Qualifiers Qs; |
226 | Qs.addFastQualifiers(Mask); |
227 | return Qs; |
228 | } |
229 | |
230 | static Qualifiers fromCVRMask(unsigned CVR) { |
231 | Qualifiers Qs; |
232 | Qs.addCVRQualifiers(CVR); |
233 | return Qs; |
234 | } |
235 | |
236 | static Qualifiers fromCVRUMask(unsigned CVRU) { |
237 | Qualifiers Qs; |
238 | Qs.addCVRUQualifiers(CVRU); |
239 | return Qs; |
240 | } |
241 | |
242 | // Deserialize qualifiers from an opaque representation. |
243 | static Qualifiers fromOpaqueValue(unsigned opaque) { |
244 | Qualifiers Qs; |
245 | Qs.Mask = opaque; |
246 | return Qs; |
247 | } |
248 | |
249 | // Serialize these qualifiers into an opaque representation. |
250 | unsigned getAsOpaqueValue() const { |
251 | return Mask; |
252 | } |
253 | |
254 | bool hasConst() const { return Mask & Const; } |
255 | bool hasOnlyConst() const { return Mask == Const; } |
256 | void removeConst() { Mask &= ~Const; } |
257 | void addConst() { Mask |= Const; } |
258 | |
259 | bool hasVolatile() const { return Mask & Volatile; } |
260 | bool hasOnlyVolatile() const { return Mask == Volatile; } |
261 | void removeVolatile() { Mask &= ~Volatile; } |
262 | void addVolatile() { Mask |= Volatile; } |
263 | |
264 | bool hasRestrict() const { return Mask & Restrict; } |
265 | bool hasOnlyRestrict() const { return Mask == Restrict; } |
266 | void removeRestrict() { Mask &= ~Restrict; } |
267 | void addRestrict() { Mask |= Restrict; } |
268 | |
269 | bool hasCVRQualifiers() const { return getCVRQualifiers(); } |
270 | unsigned getCVRQualifiers() const { return Mask & CVRMask; } |
271 | unsigned getCVRUQualifiers() const { return Mask & (CVRMask | UMask); } |
272 | |
273 | void setCVRQualifiers(unsigned mask) { |
274 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 274, __PRETTY_FUNCTION__)); |
275 | Mask = (Mask & ~CVRMask) | mask; |
276 | } |
277 | void removeCVRQualifiers(unsigned mask) { |
278 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 278, __PRETTY_FUNCTION__)); |
279 | Mask &= ~mask; |
280 | } |
281 | void removeCVRQualifiers() { |
282 | removeCVRQualifiers(CVRMask); |
283 | } |
284 | void addCVRQualifiers(unsigned mask) { |
285 | assert(!(mask & ~CVRMask) && "bitmask contains non-CVR bits")((!(mask & ~CVRMask) && "bitmask contains non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask) && \"bitmask contains non-CVR bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 285, __PRETTY_FUNCTION__)); |
286 | Mask |= mask; |
287 | } |
288 | void addCVRUQualifiers(unsigned mask) { |
289 | assert(!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits")((!(mask & ~CVRMask & ~UMask) && "bitmask contains non-CVRU bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~CVRMask & ~UMask) && \"bitmask contains non-CVRU bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 289, __PRETTY_FUNCTION__)); |
290 | Mask |= mask; |
291 | } |
292 | |
293 | bool hasUnaligned() const { return Mask & UMask; } |
294 | void setUnaligned(bool flag) { |
295 | Mask = (Mask & ~UMask) | (flag ? UMask : 0); |
296 | } |
297 | void removeUnaligned() { Mask &= ~UMask; } |
298 | void addUnaligned() { Mask |= UMask; } |
299 | |
300 | bool hasObjCGCAttr() const { return Mask & GCAttrMask; } |
301 | GC getObjCGCAttr() const { return GC((Mask & GCAttrMask) >> GCAttrShift); } |
302 | void setObjCGCAttr(GC type) { |
303 | Mask = (Mask & ~GCAttrMask) | (type << GCAttrShift); |
304 | } |
305 | void removeObjCGCAttr() { setObjCGCAttr(GCNone); } |
306 | void addObjCGCAttr(GC type) { |
307 | assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 307, __PRETTY_FUNCTION__)); |
308 | setObjCGCAttr(type); |
309 | } |
310 | Qualifiers withoutObjCGCAttr() const { |
311 | Qualifiers qs = *this; |
312 | qs.removeObjCGCAttr(); |
313 | return qs; |
314 | } |
315 | Qualifiers withoutObjCLifetime() const { |
316 | Qualifiers qs = *this; |
317 | qs.removeObjCLifetime(); |
318 | return qs; |
319 | } |
320 | Qualifiers withoutAddressSpace() const { |
321 | Qualifiers qs = *this; |
322 | qs.removeAddressSpace(); |
323 | return qs; |
324 | } |
325 | |
326 | bool hasObjCLifetime() const { return Mask & LifetimeMask; } |
327 | ObjCLifetime getObjCLifetime() const { |
328 | return ObjCLifetime((Mask & LifetimeMask) >> LifetimeShift); |
329 | } |
330 | void setObjCLifetime(ObjCLifetime type) { |
331 | Mask = (Mask & ~LifetimeMask) | (type << LifetimeShift); |
332 | } |
333 | void removeObjCLifetime() { setObjCLifetime(OCL_None); } |
334 | void addObjCLifetime(ObjCLifetime type) { |
335 | assert(type)((type) ? static_cast<void> (0) : __assert_fail ("type" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 335, __PRETTY_FUNCTION__)); |
336 | assert(!hasObjCLifetime())((!hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("!hasObjCLifetime()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 336, __PRETTY_FUNCTION__)); |
337 | Mask |= (type << LifetimeShift); |
338 | } |
339 | |
340 | /// True if the lifetime is neither None or ExplicitNone. |
341 | bool hasNonTrivialObjCLifetime() const { |
342 | ObjCLifetime lifetime = getObjCLifetime(); |
343 | return (lifetime > OCL_ExplicitNone); |
344 | } |
345 | |
346 | /// True if the lifetime is either strong or weak. |
347 | bool hasStrongOrWeakObjCLifetime() const { |
348 | ObjCLifetime lifetime = getObjCLifetime(); |
349 | return (lifetime == OCL_Strong || lifetime == OCL_Weak); |
350 | } |
351 | |
352 | bool hasAddressSpace() const { return Mask & AddressSpaceMask; } |
353 | LangAS getAddressSpace() const { |
354 | return static_cast<LangAS>(Mask >> AddressSpaceShift); |
355 | } |
356 | bool hasTargetSpecificAddressSpace() const { |
357 | return isTargetAddressSpace(getAddressSpace()); |
358 | } |
359 | /// Get the address space attribute value to be printed by diagnostics. |
360 | unsigned getAddressSpaceAttributePrintValue() const { |
361 | auto Addr = getAddressSpace(); |
362 | // This function is not supposed to be used with language specific |
363 | // address spaces. If that happens, the diagnostic message should consider |
364 | // printing the QualType instead of the address space value. |
365 | assert(Addr == LangAS::Default || hasTargetSpecificAddressSpace())((Addr == LangAS::Default || hasTargetSpecificAddressSpace()) ? static_cast<void> (0) : __assert_fail ("Addr == LangAS::Default || hasTargetSpecificAddressSpace()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 365, __PRETTY_FUNCTION__)); |
366 | if (Addr != LangAS::Default) |
367 | return toTargetAddressSpace(Addr); |
368 | // TODO: The diagnostic messages where Addr may be 0 should be fixed |
369 | // since it cannot differentiate the situation where 0 denotes the default |
370 | // address space or user specified __attribute__((address_space(0))). |
371 | return 0; |
372 | } |
373 | void setAddressSpace(LangAS space) { |
374 | assert((unsigned)space <= MaxAddressSpace)(((unsigned)space <= MaxAddressSpace) ? static_cast<void > (0) : __assert_fail ("(unsigned)space <= MaxAddressSpace" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 374, __PRETTY_FUNCTION__)); |
375 | Mask = (Mask & ~AddressSpaceMask) |
376 | | (((uint32_t) space) << AddressSpaceShift); |
377 | } |
378 | void removeAddressSpace() { setAddressSpace(LangAS::Default); } |
379 | void addAddressSpace(LangAS space) { |
380 | assert(space != LangAS::Default)((space != LangAS::Default) ? static_cast<void> (0) : __assert_fail ("space != LangAS::Default", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 380, __PRETTY_FUNCTION__)); |
381 | setAddressSpace(space); |
382 | } |
383 | |
384 | // Fast qualifiers are those that can be allocated directly |
385 | // on a QualType object. |
386 | bool hasFastQualifiers() const { return getFastQualifiers(); } |
387 | unsigned getFastQualifiers() const { return Mask & FastMask; } |
388 | void setFastQualifiers(unsigned mask) { |
389 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 389, __PRETTY_FUNCTION__)); |
390 | Mask = (Mask & ~FastMask) | mask; |
391 | } |
392 | void removeFastQualifiers(unsigned mask) { |
393 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 393, __PRETTY_FUNCTION__)); |
394 | Mask &= ~mask; |
395 | } |
396 | void removeFastQualifiers() { |
397 | removeFastQualifiers(FastMask); |
398 | } |
399 | void addFastQualifiers(unsigned mask) { |
400 | assert(!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits")((!(mask & ~FastMask) && "bitmask contains non-fast qualifier bits" ) ? static_cast<void> (0) : __assert_fail ("!(mask & ~FastMask) && \"bitmask contains non-fast qualifier bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 400, __PRETTY_FUNCTION__)); |
401 | Mask |= mask; |
402 | } |
403 | |
404 | /// Return true if the set contains any qualifiers which require an ExtQuals |
405 | /// node to be allocated. |
406 | bool hasNonFastQualifiers() const { return Mask & ~FastMask; } |
407 | Qualifiers getNonFastQualifiers() const { |
408 | Qualifiers Quals = *this; |
409 | Quals.setFastQualifiers(0); |
410 | return Quals; |
411 | } |
412 | |
413 | /// Return true if the set contains any qualifiers. |
414 | bool hasQualifiers() const { return Mask; } |
415 | bool empty() const { return !Mask; } |
416 | |
417 | /// Add the qualifiers from the given set to this set. |
418 | void addQualifiers(Qualifiers Q) { |
419 | // If the other set doesn't have any non-boolean qualifiers, just |
420 | // bit-or it in. |
421 | if (!(Q.Mask & ~CVRMask)) |
422 | Mask |= Q.Mask; |
423 | else { |
424 | Mask |= (Q.Mask & CVRMask); |
425 | if (Q.hasAddressSpace()) |
426 | addAddressSpace(Q.getAddressSpace()); |
427 | if (Q.hasObjCGCAttr()) |
428 | addObjCGCAttr(Q.getObjCGCAttr()); |
429 | if (Q.hasObjCLifetime()) |
430 | addObjCLifetime(Q.getObjCLifetime()); |
431 | } |
432 | } |
433 | |
434 | /// Remove the qualifiers from the given set from this set. |
435 | void removeQualifiers(Qualifiers Q) { |
436 | // If the other set doesn't have any non-boolean qualifiers, just |
437 | // bit-and the inverse in. |
438 | if (!(Q.Mask & ~CVRMask)) |
439 | Mask &= ~Q.Mask; |
440 | else { |
441 | Mask &= ~(Q.Mask & CVRMask); |
442 | if (getObjCGCAttr() == Q.getObjCGCAttr()) |
443 | removeObjCGCAttr(); |
444 | if (getObjCLifetime() == Q.getObjCLifetime()) |
445 | removeObjCLifetime(); |
446 | if (getAddressSpace() == Q.getAddressSpace()) |
447 | removeAddressSpace(); |
448 | } |
449 | } |
450 | |
451 | /// Add the qualifiers from the given set to this set, given that |
452 | /// they don't conflict. |
453 | void addConsistentQualifiers(Qualifiers qs) { |
454 | assert(getAddressSpace() == qs.getAddressSpace() ||((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace () || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 455, __PRETTY_FUNCTION__)) |
455 | !hasAddressSpace() || !qs.hasAddressSpace())((getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace () || !qs.hasAddressSpace()) ? static_cast<void> (0) : __assert_fail ("getAddressSpace() == qs.getAddressSpace() || !hasAddressSpace() || !qs.hasAddressSpace()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 455, __PRETTY_FUNCTION__)); |
456 | assert(getObjCGCAttr() == qs.getObjCGCAttr() ||((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 457, __PRETTY_FUNCTION__)) |
457 | !hasObjCGCAttr() || !qs.hasObjCGCAttr())((getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()) ? static_cast<void> (0) : __assert_fail ("getObjCGCAttr() == qs.getObjCGCAttr() || !hasObjCGCAttr() || !qs.hasObjCGCAttr()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 457, __PRETTY_FUNCTION__)); |
458 | assert(getObjCLifetime() == qs.getObjCLifetime() ||((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime () || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 459, __PRETTY_FUNCTION__)) |
459 | !hasObjCLifetime() || !qs.hasObjCLifetime())((getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime () || !qs.hasObjCLifetime()) ? static_cast<void> (0) : __assert_fail ("getObjCLifetime() == qs.getObjCLifetime() || !hasObjCLifetime() || !qs.hasObjCLifetime()" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 459, __PRETTY_FUNCTION__)); |
460 | Mask |= qs.Mask; |
461 | } |
462 | |
463 | /// Returns true if address space A is equal to or a superset of B. |
464 | /// OpenCL v2.0 defines conversion rules (OpenCLC v2.0 s6.5.5) and notion of |
465 | /// overlapping address spaces. |
466 | /// CL1.1 or CL1.2: |
467 | /// every address space is a superset of itself. |
468 | /// CL2.0 adds: |
469 | /// __generic is a superset of any address space except for __constant. |
470 | static bool isAddressSpaceSupersetOf(LangAS A, LangAS B) { |
471 | // Address spaces must match exactly. |
472 | return A == B || |
473 | // Otherwise in OpenCLC v2.0 s6.5.5: every address space except |
474 | // for __constant can be used as __generic. |
475 | (A == LangAS::opencl_generic && B != LangAS::opencl_constant); |
476 | } |
477 | |
478 | /// Returns true if the address space in these qualifiers is equal to or |
479 | /// a superset of the address space in the argument qualifiers. |
480 | bool isAddressSpaceSupersetOf(Qualifiers other) const { |
481 | return isAddressSpaceSupersetOf(getAddressSpace(), other.getAddressSpace()); |
482 | } |
483 | |
484 | /// Determines if these qualifiers compatibly include another set. |
485 | /// Generally this answers the question of whether an object with the other |
486 | /// qualifiers can be safely used as an object with these qualifiers. |
487 | bool compatiblyIncludes(Qualifiers other) const { |
488 | return isAddressSpaceSupersetOf(other) && |
489 | // ObjC GC qualifiers can match, be added, or be removed, but can't |
490 | // be changed. |
491 | (getObjCGCAttr() == other.getObjCGCAttr() || !hasObjCGCAttr() || |
492 | !other.hasObjCGCAttr()) && |
493 | // ObjC lifetime qualifiers must match exactly. |
494 | getObjCLifetime() == other.getObjCLifetime() && |
495 | // CVR qualifiers may subset. |
496 | (((Mask & CVRMask) | (other.Mask & CVRMask)) == (Mask & CVRMask)) && |
497 | // U qualifier may superset. |
498 | (!other.hasUnaligned() || hasUnaligned()); |
499 | } |
500 | |
501 | /// Determines if these qualifiers compatibly include another set of |
502 | /// qualifiers from the narrow perspective of Objective-C ARC lifetime. |
503 | /// |
504 | /// One set of Objective-C lifetime qualifiers compatibly includes the other |
505 | /// if the lifetime qualifiers match, or if both are non-__weak and the |
506 | /// including set also contains the 'const' qualifier, or both are non-__weak |
507 | /// and one is None (which can only happen in non-ARC modes). |
508 | bool compatiblyIncludesObjCLifetime(Qualifiers other) const { |
509 | if (getObjCLifetime() == other.getObjCLifetime()) |
510 | return true; |
511 | |
512 | if (getObjCLifetime() == OCL_Weak || other.getObjCLifetime() == OCL_Weak) |
513 | return false; |
514 | |
515 | if (getObjCLifetime() == OCL_None || other.getObjCLifetime() == OCL_None) |
516 | return true; |
517 | |
518 | return hasConst(); |
519 | } |
520 | |
521 | /// Determine whether this set of qualifiers is a strict superset of |
522 | /// another set of qualifiers, not considering qualifier compatibility. |
523 | bool isStrictSupersetOf(Qualifiers Other) const; |
524 | |
525 | bool operator==(Qualifiers Other) const { return Mask == Other.Mask; } |
526 | bool operator!=(Qualifiers Other) const { return Mask != Other.Mask; } |
527 | |
528 | explicit operator bool() const { return hasQualifiers(); } |
529 | |
530 | Qualifiers &operator+=(Qualifiers R) { |
531 | addQualifiers(R); |
532 | return *this; |
533 | } |
534 | |
535 | // Union two qualifier sets. If an enumerated qualifier appears |
536 | // in both sets, use the one from the right. |
537 | friend Qualifiers operator+(Qualifiers L, Qualifiers R) { |
538 | L += R; |
539 | return L; |
540 | } |
541 | |
542 | Qualifiers &operator-=(Qualifiers R) { |
543 | removeQualifiers(R); |
544 | return *this; |
545 | } |
546 | |
547 | /// Compute the difference between two qualifier sets. |
548 | friend Qualifiers operator-(Qualifiers L, Qualifiers R) { |
549 | L -= R; |
550 | return L; |
551 | } |
552 | |
553 | std::string getAsString() const; |
554 | std::string getAsString(const PrintingPolicy &Policy) const; |
555 | |
556 | bool isEmptyWhenPrinted(const PrintingPolicy &Policy) const; |
557 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
558 | bool appendSpaceIfNonEmpty = false) const; |
559 | |
560 | void Profile(llvm::FoldingSetNodeID &ID) const { |
561 | ID.AddInteger(Mask); |
562 | } |
563 | |
564 | private: |
565 | // bits: |0 1 2|3|4 .. 5|6 .. 8|9 ... 31| |
566 | // |C R V|U|GCAttr|Lifetime|AddressSpace| |
567 | uint32_t Mask = 0; |
568 | |
569 | static const uint32_t UMask = 0x8; |
570 | static const uint32_t UShift = 3; |
571 | static const uint32_t GCAttrMask = 0x30; |
572 | static const uint32_t GCAttrShift = 4; |
573 | static const uint32_t LifetimeMask = 0x1C0; |
574 | static const uint32_t LifetimeShift = 6; |
575 | static const uint32_t AddressSpaceMask = |
576 | ~(CVRMask | UMask | GCAttrMask | LifetimeMask); |
577 | static const uint32_t AddressSpaceShift = 9; |
578 | }; |
579 | |
580 | /// A std::pair-like structure for storing a qualified type split |
581 | /// into its local qualifiers and its locally-unqualified type. |
582 | struct SplitQualType { |
583 | /// The locally-unqualified type. |
584 | const Type *Ty = nullptr; |
585 | |
586 | /// The local qualifiers. |
587 | Qualifiers Quals; |
588 | |
589 | SplitQualType() = default; |
590 | SplitQualType(const Type *ty, Qualifiers qs) : Ty(ty), Quals(qs) {} |
591 | |
592 | SplitQualType getSingleStepDesugaredType() const; // end of this file |
593 | |
594 | // Make std::tie work. |
595 | std::pair<const Type *,Qualifiers> asPair() const { |
596 | return std::pair<const Type *, Qualifiers>(Ty, Quals); |
597 | } |
598 | |
599 | friend bool operator==(SplitQualType a, SplitQualType b) { |
600 | return a.Ty == b.Ty && a.Quals == b.Quals; |
601 | } |
602 | friend bool operator!=(SplitQualType a, SplitQualType b) { |
603 | return a.Ty != b.Ty || a.Quals != b.Quals; |
604 | } |
605 | }; |
606 | |
607 | /// The kind of type we are substituting Objective-C type arguments into. |
608 | /// |
609 | /// The kind of substitution affects the replacement of type parameters when |
610 | /// no concrete type information is provided, e.g., when dealing with an |
611 | /// unspecialized type. |
612 | enum class ObjCSubstitutionContext { |
613 | /// An ordinary type. |
614 | Ordinary, |
615 | |
616 | /// The result type of a method or function. |
617 | Result, |
618 | |
619 | /// The parameter type of a method or function. |
620 | Parameter, |
621 | |
622 | /// The type of a property. |
623 | Property, |
624 | |
625 | /// The superclass of a type. |
626 | Superclass, |
627 | }; |
628 | |
629 | /// A (possibly-)qualified type. |
630 | /// |
631 | /// For efficiency, we don't store CV-qualified types as nodes on their |
632 | /// own: instead each reference to a type stores the qualifiers. This |
633 | /// greatly reduces the number of nodes we need to allocate for types (for |
634 | /// example we only need one for 'int', 'const int', 'volatile int', |
635 | /// 'const volatile int', etc). |
636 | /// |
637 | /// As an added efficiency bonus, instead of making this a pair, we |
638 | /// just store the two bits we care about in the low bits of the |
639 | /// pointer. To handle the packing/unpacking, we make QualType be a |
640 | /// simple wrapper class that acts like a smart pointer. A third bit |
641 | /// indicates whether there are extended qualifiers present, in which |
642 | /// case the pointer points to a special structure. |
643 | class QualType { |
644 | friend class QualifierCollector; |
645 | |
646 | // Thankfully, these are efficiently composable. |
647 | llvm::PointerIntPair<llvm::PointerUnion<const Type *, const ExtQuals *>, |
648 | Qualifiers::FastWidth> Value; |
649 | |
650 | const ExtQuals *getExtQualsUnsafe() const { |
651 | return Value.getPointer().get<const ExtQuals*>(); |
652 | } |
653 | |
654 | const Type *getTypePtrUnsafe() const { |
655 | return Value.getPointer().get<const Type*>(); |
656 | } |
657 | |
658 | const ExtQualsTypeCommonBase *getCommonPtr() const { |
659 | assert(!isNull() && "Cannot retrieve a NULL type pointer")((!isNull() && "Cannot retrieve a NULL type pointer") ? static_cast<void> (0) : __assert_fail ("!isNull() && \"Cannot retrieve a NULL type pointer\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 659, __PRETTY_FUNCTION__)); |
660 | auto CommonPtrVal = reinterpret_cast<uintptr_t>(Value.getOpaqueValue()); |
661 | CommonPtrVal &= ~(uintptr_t)((1 << TypeAlignmentInBits) - 1); |
662 | return reinterpret_cast<ExtQualsTypeCommonBase*>(CommonPtrVal); |
663 | } |
664 | |
665 | public: |
666 | QualType() = default; |
667 | QualType(const Type *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
668 | QualType(const ExtQuals *Ptr, unsigned Quals) : Value(Ptr, Quals) {} |
669 | |
670 | unsigned getLocalFastQualifiers() const { return Value.getInt(); } |
671 | void setLocalFastQualifiers(unsigned Quals) { Value.setInt(Quals); } |
672 | |
673 | /// Retrieves a pointer to the underlying (unqualified) type. |
674 | /// |
675 | /// This function requires that the type not be NULL. If the type might be |
676 | /// NULL, use the (slightly less efficient) \c getTypePtrOrNull(). |
677 | const Type *getTypePtr() const; |
678 | |
679 | const Type *getTypePtrOrNull() const; |
680 | |
681 | /// Retrieves a pointer to the name of the base type. |
682 | const IdentifierInfo *getBaseTypeIdentifier() const; |
683 | |
684 | /// Divides a QualType into its unqualified type and a set of local |
685 | /// qualifiers. |
686 | SplitQualType split() const; |
687 | |
688 | void *getAsOpaquePtr() const { return Value.getOpaqueValue(); } |
689 | |
690 | static QualType getFromOpaquePtr(const void *Ptr) { |
691 | QualType T; |
692 | T.Value.setFromOpaqueValue(const_cast<void*>(Ptr)); |
693 | return T; |
694 | } |
695 | |
696 | const Type &operator*() const { |
697 | return *getTypePtr(); |
698 | } |
699 | |
700 | const Type *operator->() const { |
701 | return getTypePtr(); |
702 | } |
703 | |
704 | bool isCanonical() const; |
705 | bool isCanonicalAsParam() const; |
706 | |
707 | /// Return true if this QualType doesn't point to a type yet. |
708 | bool isNull() const { |
709 | return Value.getPointer().isNull(); |
710 | } |
711 | |
712 | /// Determine whether this particular QualType instance has the |
713 | /// "const" qualifier set, without looking through typedefs that may have |
714 | /// added "const" at a different level. |
715 | bool isLocalConstQualified() const { |
716 | return (getLocalFastQualifiers() & Qualifiers::Const); |
717 | } |
718 | |
719 | /// Determine whether this type is const-qualified. |
720 | bool isConstQualified() const; |
721 | |
722 | /// Determine whether this particular QualType instance has the |
723 | /// "restrict" qualifier set, without looking through typedefs that may have |
724 | /// added "restrict" at a different level. |
725 | bool isLocalRestrictQualified() const { |
726 | return (getLocalFastQualifiers() & Qualifiers::Restrict); |
727 | } |
728 | |
729 | /// Determine whether this type is restrict-qualified. |
730 | bool isRestrictQualified() const; |
731 | |
732 | /// Determine whether this particular QualType instance has the |
733 | /// "volatile" qualifier set, without looking through typedefs that may have |
734 | /// added "volatile" at a different level. |
735 | bool isLocalVolatileQualified() const { |
736 | return (getLocalFastQualifiers() & Qualifiers::Volatile); |
737 | } |
738 | |
739 | /// Determine whether this type is volatile-qualified. |
740 | bool isVolatileQualified() const; |
741 | |
742 | /// Determine whether this particular QualType instance has any |
743 | /// qualifiers, without looking through any typedefs that might add |
744 | /// qualifiers at a different level. |
745 | bool hasLocalQualifiers() const { |
746 | return getLocalFastQualifiers() || hasLocalNonFastQualifiers(); |
747 | } |
748 | |
749 | /// Determine whether this type has any qualifiers. |
750 | bool hasQualifiers() const; |
751 | |
752 | /// Determine whether this particular QualType instance has any |
753 | /// "non-fast" qualifiers, e.g., those that are stored in an ExtQualType |
754 | /// instance. |
755 | bool hasLocalNonFastQualifiers() const { |
756 | return Value.getPointer().is<const ExtQuals*>(); |
757 | } |
758 | |
759 | /// Retrieve the set of qualifiers local to this particular QualType |
760 | /// instance, not including any qualifiers acquired through typedefs or |
761 | /// other sugar. |
762 | Qualifiers getLocalQualifiers() const; |
763 | |
764 | /// Retrieve the set of qualifiers applied to this type. |
765 | Qualifiers getQualifiers() const; |
766 | |
767 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
768 | /// local to this particular QualType instance, not including any qualifiers |
769 | /// acquired through typedefs or other sugar. |
770 | unsigned getLocalCVRQualifiers() const { |
771 | return getLocalFastQualifiers(); |
772 | } |
773 | |
774 | /// Retrieve the set of CVR (const-volatile-restrict) qualifiers |
775 | /// applied to this type. |
776 | unsigned getCVRQualifiers() const; |
777 | |
778 | bool isConstant(const ASTContext& Ctx) const { |
779 | return QualType::isConstant(*this, Ctx); |
780 | } |
781 | |
782 | /// Determine whether this is a Plain Old Data (POD) type (C++ 3.9p10). |
783 | bool isPODType(const ASTContext &Context) const; |
784 | |
785 | /// Return true if this is a POD type according to the rules of the C++98 |
786 | /// standard, regardless of the current compilation's language. |
787 | bool isCXX98PODType(const ASTContext &Context) const; |
788 | |
789 | /// Return true if this is a POD type according to the more relaxed rules |
790 | /// of the C++11 standard, regardless of the current compilation's language. |
791 | /// (C++0x [basic.types]p9). Note that, unlike |
792 | /// CXXRecordDecl::isCXX11StandardLayout, this takes DRs into account. |
793 | bool isCXX11PODType(const ASTContext &Context) const; |
794 | |
795 | /// Return true if this is a trivial type per (C++0x [basic.types]p9) |
796 | bool isTrivialType(const ASTContext &Context) const; |
797 | |
798 | /// Return true if this is a trivially copyable type (C++0x [basic.types]p9) |
799 | bool isTriviallyCopyableType(const ASTContext &Context) const; |
800 | |
801 | |
802 | /// Returns true if it is a class and it might be dynamic. |
803 | bool mayBeDynamicClass() const; |
804 | |
805 | /// Returns true if it is not a class or if the class might not be dynamic. |
806 | bool mayBeNotDynamicClass() const; |
807 | |
808 | // Don't promise in the API that anything besides 'const' can be |
809 | // easily added. |
810 | |
811 | /// Add the `const` type qualifier to this QualType. |
812 | void addConst() { |
813 | addFastQualifiers(Qualifiers::Const); |
814 | } |
815 | QualType withConst() const { |
816 | return withFastQualifiers(Qualifiers::Const); |
817 | } |
818 | |
819 | /// Add the `volatile` type qualifier to this QualType. |
820 | void addVolatile() { |
821 | addFastQualifiers(Qualifiers::Volatile); |
822 | } |
823 | QualType withVolatile() const { |
824 | return withFastQualifiers(Qualifiers::Volatile); |
825 | } |
826 | |
827 | /// Add the `restrict` qualifier to this QualType. |
828 | void addRestrict() { |
829 | addFastQualifiers(Qualifiers::Restrict); |
830 | } |
831 | QualType withRestrict() const { |
832 | return withFastQualifiers(Qualifiers::Restrict); |
833 | } |
834 | |
835 | QualType withCVRQualifiers(unsigned CVR) const { |
836 | return withFastQualifiers(CVR); |
837 | } |
838 | |
839 | void addFastQualifiers(unsigned TQs) { |
840 | assert(!(TQs & ~Qualifiers::FastMask)((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!" ) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 841, __PRETTY_FUNCTION__)) |
841 | && "non-fast qualifier bits set in mask!")((!(TQs & ~Qualifiers::FastMask) && "non-fast qualifier bits set in mask!" ) ? static_cast<void> (0) : __assert_fail ("!(TQs & ~Qualifiers::FastMask) && \"non-fast qualifier bits set in mask!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 841, __PRETTY_FUNCTION__)); |
842 | Value.setInt(Value.getInt() | TQs); |
843 | } |
844 | |
845 | void removeLocalConst(); |
846 | void removeLocalVolatile(); |
847 | void removeLocalRestrict(); |
848 | void removeLocalCVRQualifiers(unsigned Mask); |
849 | |
850 | void removeLocalFastQualifiers() { Value.setInt(0); } |
851 | void removeLocalFastQualifiers(unsigned Mask) { |
852 | assert(!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers")((!(Mask & ~Qualifiers::FastMask) && "mask has non-fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::FastMask) && \"mask has non-fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 852, __PRETTY_FUNCTION__)); |
853 | Value.setInt(Value.getInt() & ~Mask); |
854 | } |
855 | |
856 | // Creates a type with the given qualifiers in addition to any |
857 | // qualifiers already on this type. |
858 | QualType withFastQualifiers(unsigned TQs) const { |
859 | QualType T = *this; |
860 | T.addFastQualifiers(TQs); |
861 | return T; |
862 | } |
863 | |
864 | // Creates a type with exactly the given fast qualifiers, removing |
865 | // any existing fast qualifiers. |
866 | QualType withExactLocalFastQualifiers(unsigned TQs) const { |
867 | return withoutLocalFastQualifiers().withFastQualifiers(TQs); |
868 | } |
869 | |
870 | // Removes fast qualifiers, but leaves any extended qualifiers in place. |
871 | QualType withoutLocalFastQualifiers() const { |
872 | QualType T = *this; |
873 | T.removeLocalFastQualifiers(); |
874 | return T; |
875 | } |
876 | |
877 | QualType getCanonicalType() const; |
878 | |
879 | /// Return this type with all of the instance-specific qualifiers |
880 | /// removed, but without removing any qualifiers that may have been applied |
881 | /// through typedefs. |
882 | QualType getLocalUnqualifiedType() const { return QualType(getTypePtr(), 0); } |
883 | |
884 | /// Retrieve the unqualified variant of the given type, |
885 | /// removing as little sugar as possible. |
886 | /// |
887 | /// This routine looks through various kinds of sugar to find the |
888 | /// least-desugared type that is unqualified. For example, given: |
889 | /// |
890 | /// \code |
891 | /// typedef int Integer; |
892 | /// typedef const Integer CInteger; |
893 | /// typedef CInteger DifferenceType; |
894 | /// \endcode |
895 | /// |
896 | /// Executing \c getUnqualifiedType() on the type \c DifferenceType will |
897 | /// desugar until we hit the type \c Integer, which has no qualifiers on it. |
898 | /// |
899 | /// The resulting type might still be qualified if it's sugar for an array |
900 | /// type. To strip qualifiers even from within a sugared array type, use |
901 | /// ASTContext::getUnqualifiedArrayType. |
902 | inline QualType getUnqualifiedType() const; |
903 | |
904 | /// Retrieve the unqualified variant of the given type, removing as little |
905 | /// sugar as possible. |
906 | /// |
907 | /// Like getUnqualifiedType(), but also returns the set of |
908 | /// qualifiers that were built up. |
909 | /// |
910 | /// The resulting type might still be qualified if it's sugar for an array |
911 | /// type. To strip qualifiers even from within a sugared array type, use |
912 | /// ASTContext::getUnqualifiedArrayType. |
913 | inline SplitQualType getSplitUnqualifiedType() const; |
914 | |
915 | /// Determine whether this type is more qualified than the other |
916 | /// given type, requiring exact equality for non-CVR qualifiers. |
917 | bool isMoreQualifiedThan(QualType Other) const; |
918 | |
919 | /// Determine whether this type is at least as qualified as the other |
920 | /// given type, requiring exact equality for non-CVR qualifiers. |
921 | bool isAtLeastAsQualifiedAs(QualType Other) const; |
922 | |
923 | QualType getNonReferenceType() const; |
924 | |
925 | /// Determine the type of a (typically non-lvalue) expression with the |
926 | /// specified result type. |
927 | /// |
928 | /// This routine should be used for expressions for which the return type is |
929 | /// explicitly specified (e.g., in a cast or call) and isn't necessarily |
930 | /// an lvalue. It removes a top-level reference (since there are no |
931 | /// expressions of reference type) and deletes top-level cvr-qualifiers |
932 | /// from non-class types (in C++) or all types (in C). |
933 | QualType getNonLValueExprType(const ASTContext &Context) const; |
934 | |
935 | /// Return the specified type with any "sugar" removed from |
936 | /// the type. This takes off typedefs, typeof's etc. If the outer level of |
937 | /// the type is already concrete, it returns it unmodified. This is similar |
938 | /// to getting the canonical type, but it doesn't remove *all* typedefs. For |
939 | /// example, it returns "T*" as "T*", (not as "int*"), because the pointer is |
940 | /// concrete. |
941 | /// |
942 | /// Qualifiers are left in place. |
943 | QualType getDesugaredType(const ASTContext &Context) const { |
944 | return getDesugaredType(*this, Context); |
945 | } |
946 | |
947 | SplitQualType getSplitDesugaredType() const { |
948 | return getSplitDesugaredType(*this); |
949 | } |
950 | |
951 | /// Return the specified type with one level of "sugar" removed from |
952 | /// the type. |
953 | /// |
954 | /// This routine takes off the first typedef, typeof, etc. If the outer level |
955 | /// of the type is already concrete, it returns it unmodified. |
956 | QualType getSingleStepDesugaredType(const ASTContext &Context) const { |
957 | return getSingleStepDesugaredTypeImpl(*this, Context); |
958 | } |
959 | |
960 | /// Returns the specified type after dropping any |
961 | /// outer-level parentheses. |
962 | QualType IgnoreParens() const { |
963 | if (isa<ParenType>(*this)) |
964 | return QualType::IgnoreParens(*this); |
965 | return *this; |
966 | } |
967 | |
968 | /// Indicate whether the specified types and qualifiers are identical. |
969 | friend bool operator==(const QualType &LHS, const QualType &RHS) { |
970 | return LHS.Value == RHS.Value; |
971 | } |
972 | friend bool operator!=(const QualType &LHS, const QualType &RHS) { |
973 | return LHS.Value != RHS.Value; |
974 | } |
975 | friend bool operator<(const QualType &LHS, const QualType &RHS) { |
976 | return LHS.Value < RHS.Value; |
977 | } |
978 | |
979 | static std::string getAsString(SplitQualType split, |
980 | const PrintingPolicy &Policy) { |
981 | return getAsString(split.Ty, split.Quals, Policy); |
982 | } |
983 | static std::string getAsString(const Type *ty, Qualifiers qs, |
984 | const PrintingPolicy &Policy); |
985 | |
986 | std::string getAsString() const; |
987 | std::string getAsString(const PrintingPolicy &Policy) const; |
988 | |
989 | void print(raw_ostream &OS, const PrintingPolicy &Policy, |
990 | const Twine &PlaceHolder = Twine(), |
991 | unsigned Indentation = 0) const; |
992 | |
993 | static void print(SplitQualType split, raw_ostream &OS, |
994 | const PrintingPolicy &policy, const Twine &PlaceHolder, |
995 | unsigned Indentation = 0) { |
996 | return print(split.Ty, split.Quals, OS, policy, PlaceHolder, Indentation); |
997 | } |
998 | |
999 | static void print(const Type *ty, Qualifiers qs, |
1000 | raw_ostream &OS, const PrintingPolicy &policy, |
1001 | const Twine &PlaceHolder, |
1002 | unsigned Indentation = 0); |
1003 | |
1004 | void getAsStringInternal(std::string &Str, |
1005 | const PrintingPolicy &Policy) const; |
1006 | |
1007 | static void getAsStringInternal(SplitQualType split, std::string &out, |
1008 | const PrintingPolicy &policy) { |
1009 | return getAsStringInternal(split.Ty, split.Quals, out, policy); |
1010 | } |
1011 | |
1012 | static void getAsStringInternal(const Type *ty, Qualifiers qs, |
1013 | std::string &out, |
1014 | const PrintingPolicy &policy); |
1015 | |
1016 | class StreamedQualTypeHelper { |
1017 | const QualType &T; |
1018 | const PrintingPolicy &Policy; |
1019 | const Twine &PlaceHolder; |
1020 | unsigned Indentation; |
1021 | |
1022 | public: |
1023 | StreamedQualTypeHelper(const QualType &T, const PrintingPolicy &Policy, |
1024 | const Twine &PlaceHolder, unsigned Indentation) |
1025 | : T(T), Policy(Policy), PlaceHolder(PlaceHolder), |
1026 | Indentation(Indentation) {} |
1027 | |
1028 | friend raw_ostream &operator<<(raw_ostream &OS, |
1029 | const StreamedQualTypeHelper &SQT) { |
1030 | SQT.T.print(OS, SQT.Policy, SQT.PlaceHolder, SQT.Indentation); |
1031 | return OS; |
1032 | } |
1033 | }; |
1034 | |
1035 | StreamedQualTypeHelper stream(const PrintingPolicy &Policy, |
1036 | const Twine &PlaceHolder = Twine(), |
1037 | unsigned Indentation = 0) const { |
1038 | return StreamedQualTypeHelper(*this, Policy, PlaceHolder, Indentation); |
1039 | } |
1040 | |
1041 | void dump(const char *s) const; |
1042 | void dump() const; |
1043 | void dump(llvm::raw_ostream &OS) const; |
1044 | |
1045 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1046 | ID.AddPointer(getAsOpaquePtr()); |
1047 | } |
1048 | |
1049 | /// Return the address space of this type. |
1050 | inline LangAS getAddressSpace() const; |
1051 | |
1052 | /// Returns gc attribute of this type. |
1053 | inline Qualifiers::GC getObjCGCAttr() const; |
1054 | |
1055 | /// true when Type is objc's weak. |
1056 | bool isObjCGCWeak() const { |
1057 | return getObjCGCAttr() == Qualifiers::Weak; |
1058 | } |
1059 | |
1060 | /// true when Type is objc's strong. |
1061 | bool isObjCGCStrong() const { |
1062 | return getObjCGCAttr() == Qualifiers::Strong; |
1063 | } |
1064 | |
1065 | /// Returns lifetime attribute of this type. |
1066 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1067 | return getQualifiers().getObjCLifetime(); |
1068 | } |
1069 | |
1070 | bool hasNonTrivialObjCLifetime() const { |
1071 | return getQualifiers().hasNonTrivialObjCLifetime(); |
1072 | } |
1073 | |
1074 | bool hasStrongOrWeakObjCLifetime() const { |
1075 | return getQualifiers().hasStrongOrWeakObjCLifetime(); |
1076 | } |
1077 | |
1078 | // true when Type is objc's weak and weak is enabled but ARC isn't. |
1079 | bool isNonWeakInMRRWithObjCWeak(const ASTContext &Context) const; |
1080 | |
1081 | enum PrimitiveDefaultInitializeKind { |
1082 | /// The type does not fall into any of the following categories. Note that |
1083 | /// this case is zero-valued so that values of this enum can be used as a |
1084 | /// boolean condition for non-triviality. |
1085 | PDIK_Trivial, |
1086 | |
1087 | /// The type is an Objective-C retainable pointer type that is qualified |
1088 | /// with the ARC __strong qualifier. |
1089 | PDIK_ARCStrong, |
1090 | |
1091 | /// The type is an Objective-C retainable pointer type that is qualified |
1092 | /// with the ARC __weak qualifier. |
1093 | PDIK_ARCWeak, |
1094 | |
1095 | /// The type is a struct containing a field whose type is not PCK_Trivial. |
1096 | PDIK_Struct |
1097 | }; |
1098 | |
1099 | /// Functions to query basic properties of non-trivial C struct types. |
1100 | |
1101 | /// Check if this is a non-trivial type that would cause a C struct |
1102 | /// transitively containing this type to be non-trivial to default initialize |
1103 | /// and return the kind. |
1104 | PrimitiveDefaultInitializeKind |
1105 | isNonTrivialToPrimitiveDefaultInitialize() const; |
1106 | |
1107 | enum PrimitiveCopyKind { |
1108 | /// The type does not fall into any of the following categories. Note that |
1109 | /// this case is zero-valued so that values of this enum can be used as a |
1110 | /// boolean condition for non-triviality. |
1111 | PCK_Trivial, |
1112 | |
1113 | /// The type would be trivial except that it is volatile-qualified. Types |
1114 | /// that fall into one of the other non-trivial cases may additionally be |
1115 | /// volatile-qualified. |
1116 | PCK_VolatileTrivial, |
1117 | |
1118 | /// The type is an Objective-C retainable pointer type that is qualified |
1119 | /// with the ARC __strong qualifier. |
1120 | PCK_ARCStrong, |
1121 | |
1122 | /// The type is an Objective-C retainable pointer type that is qualified |
1123 | /// with the ARC __weak qualifier. |
1124 | PCK_ARCWeak, |
1125 | |
1126 | /// The type is a struct containing a field whose type is neither |
1127 | /// PCK_Trivial nor PCK_VolatileTrivial. |
1128 | /// Note that a C++ struct type does not necessarily match this; C++ copying |
1129 | /// semantics are too complex to express here, in part because they depend |
1130 | /// on the exact constructor or assignment operator that is chosen by |
1131 | /// overload resolution to do the copy. |
1132 | PCK_Struct |
1133 | }; |
1134 | |
1135 | /// Check if this is a non-trivial type that would cause a C struct |
1136 | /// transitively containing this type to be non-trivial to copy and return the |
1137 | /// kind. |
1138 | PrimitiveCopyKind isNonTrivialToPrimitiveCopy() const; |
1139 | |
1140 | /// Check if this is a non-trivial type that would cause a C struct |
1141 | /// transitively containing this type to be non-trivial to destructively |
1142 | /// move and return the kind. Destructive move in this context is a C++-style |
1143 | /// move in which the source object is placed in a valid but unspecified state |
1144 | /// after it is moved, as opposed to a truly destructive move in which the |
1145 | /// source object is placed in an uninitialized state. |
1146 | PrimitiveCopyKind isNonTrivialToPrimitiveDestructiveMove() const; |
1147 | |
1148 | enum DestructionKind { |
1149 | DK_none, |
1150 | DK_cxx_destructor, |
1151 | DK_objc_strong_lifetime, |
1152 | DK_objc_weak_lifetime, |
1153 | DK_nontrivial_c_struct |
1154 | }; |
1155 | |
1156 | /// Returns a nonzero value if objects of this type require |
1157 | /// non-trivial work to clean up after. Non-zero because it's |
1158 | /// conceivable that qualifiers (objc_gc(weak)?) could make |
1159 | /// something require destruction. |
1160 | DestructionKind isDestructedType() const { |
1161 | return isDestructedTypeImpl(*this); |
1162 | } |
1163 | |
1164 | /// Check if this is or contains a C union that is non-trivial to |
1165 | /// default-initialize, which is a union that has a member that is non-trivial |
1166 | /// to default-initialize. If this returns true, |
1167 | /// isNonTrivialToPrimitiveDefaultInitialize returns PDIK_Struct. |
1168 | bool hasNonTrivialToPrimitiveDefaultInitializeCUnion() const; |
1169 | |
1170 | /// Check if this is or contains a C union that is non-trivial to destruct, |
1171 | /// which is a union that has a member that is non-trivial to destruct. If |
1172 | /// this returns true, isDestructedType returns DK_nontrivial_c_struct. |
1173 | bool hasNonTrivialToPrimitiveDestructCUnion() const; |
1174 | |
1175 | /// Check if this is or contains a C union that is non-trivial to copy, which |
1176 | /// is a union that has a member that is non-trivial to copy. If this returns |
1177 | /// true, isNonTrivialToPrimitiveCopy returns PCK_Struct. |
1178 | bool hasNonTrivialToPrimitiveCopyCUnion() const; |
1179 | |
1180 | /// Determine whether expressions of the given type are forbidden |
1181 | /// from being lvalues in C. |
1182 | /// |
1183 | /// The expression types that are forbidden to be lvalues are: |
1184 | /// - 'void', but not qualified void |
1185 | /// - function types |
1186 | /// |
1187 | /// The exact rule here is C99 6.3.2.1: |
1188 | /// An lvalue is an expression with an object type or an incomplete |
1189 | /// type other than void. |
1190 | bool isCForbiddenLValueType() const; |
1191 | |
1192 | /// Substitute type arguments for the Objective-C type parameters used in the |
1193 | /// subject type. |
1194 | /// |
1195 | /// \param ctx ASTContext in which the type exists. |
1196 | /// |
1197 | /// \param typeArgs The type arguments that will be substituted for the |
1198 | /// Objective-C type parameters in the subject type, which are generally |
1199 | /// computed via \c Type::getObjCSubstitutions. If empty, the type |
1200 | /// parameters will be replaced with their bounds or id/Class, as appropriate |
1201 | /// for the context. |
1202 | /// |
1203 | /// \param context The context in which the subject type was written. |
1204 | /// |
1205 | /// \returns the resulting type. |
1206 | QualType substObjCTypeArgs(ASTContext &ctx, |
1207 | ArrayRef<QualType> typeArgs, |
1208 | ObjCSubstitutionContext context) const; |
1209 | |
1210 | /// Substitute type arguments from an object type for the Objective-C type |
1211 | /// parameters used in the subject type. |
1212 | /// |
1213 | /// This operation combines the computation of type arguments for |
1214 | /// substitution (\c Type::getObjCSubstitutions) with the actual process of |
1215 | /// substitution (\c QualType::substObjCTypeArgs) for the convenience of |
1216 | /// callers that need to perform a single substitution in isolation. |
1217 | /// |
1218 | /// \param objectType The type of the object whose member type we're |
1219 | /// substituting into. For example, this might be the receiver of a message |
1220 | /// or the base of a property access. |
1221 | /// |
1222 | /// \param dc The declaration context from which the subject type was |
1223 | /// retrieved, which indicates (for example) which type parameters should |
1224 | /// be substituted. |
1225 | /// |
1226 | /// \param context The context in which the subject type was written. |
1227 | /// |
1228 | /// \returns the subject type after replacing all of the Objective-C type |
1229 | /// parameters with their corresponding arguments. |
1230 | QualType substObjCMemberType(QualType objectType, |
1231 | const DeclContext *dc, |
1232 | ObjCSubstitutionContext context) const; |
1233 | |
1234 | /// Strip Objective-C "__kindof" types from the given type. |
1235 | QualType stripObjCKindOfType(const ASTContext &ctx) const; |
1236 | |
1237 | /// Remove all qualifiers including _Atomic. |
1238 | QualType getAtomicUnqualifiedType() const; |
1239 | |
1240 | private: |
1241 | // These methods are implemented in a separate translation unit; |
1242 | // "static"-ize them to avoid creating temporary QualTypes in the |
1243 | // caller. |
1244 | static bool isConstant(QualType T, const ASTContext& Ctx); |
1245 | static QualType getDesugaredType(QualType T, const ASTContext &Context); |
1246 | static SplitQualType getSplitDesugaredType(QualType T); |
1247 | static SplitQualType getSplitUnqualifiedTypeImpl(QualType type); |
1248 | static QualType getSingleStepDesugaredTypeImpl(QualType type, |
1249 | const ASTContext &C); |
1250 | static QualType IgnoreParens(QualType T); |
1251 | static DestructionKind isDestructedTypeImpl(QualType type); |
1252 | |
1253 | /// Check if \param RD is or contains a non-trivial C union. |
1254 | static bool hasNonTrivialToPrimitiveDefaultInitializeCUnion(const RecordDecl *RD); |
1255 | static bool hasNonTrivialToPrimitiveDestructCUnion(const RecordDecl *RD); |
1256 | static bool hasNonTrivialToPrimitiveCopyCUnion(const RecordDecl *RD); |
1257 | }; |
1258 | |
1259 | } // namespace clang |
1260 | |
1261 | namespace llvm { |
1262 | |
1263 | /// Implement simplify_type for QualType, so that we can dyn_cast from QualType |
1264 | /// to a specific Type class. |
1265 | template<> struct simplify_type< ::clang::QualType> { |
1266 | using SimpleType = const ::clang::Type *; |
1267 | |
1268 | static SimpleType getSimplifiedValue(::clang::QualType Val) { |
1269 | return Val.getTypePtr(); |
1270 | } |
1271 | }; |
1272 | |
1273 | // Teach SmallPtrSet that QualType is "basically a pointer". |
1274 | template<> |
1275 | struct PointerLikeTypeTraits<clang::QualType> { |
1276 | static inline void *getAsVoidPointer(clang::QualType P) { |
1277 | return P.getAsOpaquePtr(); |
1278 | } |
1279 | |
1280 | static inline clang::QualType getFromVoidPointer(void *P) { |
1281 | return clang::QualType::getFromOpaquePtr(P); |
1282 | } |
1283 | |
1284 | // Various qualifiers go in low bits. |
1285 | enum { NumLowBitsAvailable = 0 }; |
1286 | }; |
1287 | |
1288 | } // namespace llvm |
1289 | |
1290 | namespace clang { |
1291 | |
1292 | /// Base class that is common to both the \c ExtQuals and \c Type |
1293 | /// classes, which allows \c QualType to access the common fields between the |
1294 | /// two. |
1295 | class ExtQualsTypeCommonBase { |
1296 | friend class ExtQuals; |
1297 | friend class QualType; |
1298 | friend class Type; |
1299 | |
1300 | /// The "base" type of an extended qualifiers type (\c ExtQuals) or |
1301 | /// a self-referential pointer (for \c Type). |
1302 | /// |
1303 | /// This pointer allows an efficient mapping from a QualType to its |
1304 | /// underlying type pointer. |
1305 | const Type *const BaseType; |
1306 | |
1307 | /// The canonical type of this type. A QualType. |
1308 | QualType CanonicalType; |
1309 | |
1310 | ExtQualsTypeCommonBase(const Type *baseType, QualType canon) |
1311 | : BaseType(baseType), CanonicalType(canon) {} |
1312 | }; |
1313 | |
1314 | /// We can encode up to four bits in the low bits of a |
1315 | /// type pointer, but there are many more type qualifiers that we want |
1316 | /// to be able to apply to an arbitrary type. Therefore we have this |
1317 | /// struct, intended to be heap-allocated and used by QualType to |
1318 | /// store qualifiers. |
1319 | /// |
1320 | /// The current design tags the 'const', 'restrict', and 'volatile' qualifiers |
1321 | /// in three low bits on the QualType pointer; a fourth bit records whether |
1322 | /// the pointer is an ExtQuals node. The extended qualifiers (address spaces, |
1323 | /// Objective-C GC attributes) are much more rare. |
1324 | class ExtQuals : public ExtQualsTypeCommonBase, public llvm::FoldingSetNode { |
1325 | // NOTE: changing the fast qualifiers should be straightforward as |
1326 | // long as you don't make 'const' non-fast. |
1327 | // 1. Qualifiers: |
1328 | // a) Modify the bitmasks (Qualifiers::TQ and DeclSpec::TQ). |
1329 | // Fast qualifiers must occupy the low-order bits. |
1330 | // b) Update Qualifiers::FastWidth and FastMask. |
1331 | // 2. QualType: |
1332 | // a) Update is{Volatile,Restrict}Qualified(), defined inline. |
1333 | // b) Update remove{Volatile,Restrict}, defined near the end of |
1334 | // this header. |
1335 | // 3. ASTContext: |
1336 | // a) Update get{Volatile,Restrict}Type. |
1337 | |
1338 | /// The immutable set of qualifiers applied by this node. Always contains |
1339 | /// extended qualifiers. |
1340 | Qualifiers Quals; |
1341 | |
1342 | ExtQuals *this_() { return this; } |
1343 | |
1344 | public: |
1345 | ExtQuals(const Type *baseType, QualType canon, Qualifiers quals) |
1346 | : ExtQualsTypeCommonBase(baseType, |
1347 | canon.isNull() ? QualType(this_(), 0) : canon), |
1348 | Quals(quals) { |
1349 | assert(Quals.hasNonFastQualifiers()((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1350, __PRETTY_FUNCTION__)) |
1350 | && "ExtQuals created with no fast qualifiers")((Quals.hasNonFastQualifiers() && "ExtQuals created with no fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("Quals.hasNonFastQualifiers() && \"ExtQuals created with no fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1350, __PRETTY_FUNCTION__)); |
1351 | assert(!Quals.hasFastQualifiers()((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1352, __PRETTY_FUNCTION__)) |
1352 | && "ExtQuals created with fast qualifiers")((!Quals.hasFastQualifiers() && "ExtQuals created with fast qualifiers" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"ExtQuals created with fast qualifiers\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1352, __PRETTY_FUNCTION__)); |
1353 | } |
1354 | |
1355 | Qualifiers getQualifiers() const { return Quals; } |
1356 | |
1357 | bool hasObjCGCAttr() const { return Quals.hasObjCGCAttr(); } |
1358 | Qualifiers::GC getObjCGCAttr() const { return Quals.getObjCGCAttr(); } |
1359 | |
1360 | bool hasObjCLifetime() const { return Quals.hasObjCLifetime(); } |
1361 | Qualifiers::ObjCLifetime getObjCLifetime() const { |
1362 | return Quals.getObjCLifetime(); |
1363 | } |
1364 | |
1365 | bool hasAddressSpace() const { return Quals.hasAddressSpace(); } |
1366 | LangAS getAddressSpace() const { return Quals.getAddressSpace(); } |
1367 | |
1368 | const Type *getBaseType() const { return BaseType; } |
1369 | |
1370 | public: |
1371 | void Profile(llvm::FoldingSetNodeID &ID) const { |
1372 | Profile(ID, getBaseType(), Quals); |
1373 | } |
1374 | |
1375 | static void Profile(llvm::FoldingSetNodeID &ID, |
1376 | const Type *BaseType, |
1377 | Qualifiers Quals) { |
1378 | assert(!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!")((!Quals.hasFastQualifiers() && "fast qualifiers in ExtQuals hash!" ) ? static_cast<void> (0) : __assert_fail ("!Quals.hasFastQualifiers() && \"fast qualifiers in ExtQuals hash!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1378, __PRETTY_FUNCTION__)); |
1379 | ID.AddPointer(BaseType); |
1380 | Quals.Profile(ID); |
1381 | } |
1382 | }; |
1383 | |
1384 | /// The kind of C++11 ref-qualifier associated with a function type. |
1385 | /// This determines whether a member function's "this" object can be an |
1386 | /// lvalue, rvalue, or neither. |
1387 | enum RefQualifierKind { |
1388 | /// No ref-qualifier was provided. |
1389 | RQ_None = 0, |
1390 | |
1391 | /// An lvalue ref-qualifier was provided (\c &). |
1392 | RQ_LValue, |
1393 | |
1394 | /// An rvalue ref-qualifier was provided (\c &&). |
1395 | RQ_RValue |
1396 | }; |
1397 | |
1398 | /// Which keyword(s) were used to create an AutoType. |
1399 | enum class AutoTypeKeyword { |
1400 | /// auto |
1401 | Auto, |
1402 | |
1403 | /// decltype(auto) |
1404 | DecltypeAuto, |
1405 | |
1406 | /// __auto_type (GNU extension) |
1407 | GNUAutoType |
1408 | }; |
1409 | |
1410 | /// The base class of the type hierarchy. |
1411 | /// |
1412 | /// A central concept with types is that each type always has a canonical |
1413 | /// type. A canonical type is the type with any typedef names stripped out |
1414 | /// of it or the types it references. For example, consider: |
1415 | /// |
1416 | /// typedef int foo; |
1417 | /// typedef foo* bar; |
1418 | /// 'int *' 'foo *' 'bar' |
1419 | /// |
1420 | /// There will be a Type object created for 'int'. Since int is canonical, its |
1421 | /// CanonicalType pointer points to itself. There is also a Type for 'foo' (a |
1422 | /// TypedefType). Its CanonicalType pointer points to the 'int' Type. Next |
1423 | /// there is a PointerType that represents 'int*', which, like 'int', is |
1424 | /// canonical. Finally, there is a PointerType type for 'foo*' whose canonical |
1425 | /// type is 'int*', and there is a TypedefType for 'bar', whose canonical type |
1426 | /// is also 'int*'. |
1427 | /// |
1428 | /// Non-canonical types are useful for emitting diagnostics, without losing |
1429 | /// information about typedefs being used. Canonical types are useful for type |
1430 | /// comparisons (they allow by-pointer equality tests) and useful for reasoning |
1431 | /// about whether something has a particular form (e.g. is a function type), |
1432 | /// because they implicitly, recursively, strip all typedefs out of a type. |
1433 | /// |
1434 | /// Types, once created, are immutable. |
1435 | /// |
1436 | class alignas(8) Type : public ExtQualsTypeCommonBase { |
1437 | public: |
1438 | enum TypeClass { |
1439 | #define TYPE(Class, Base) Class, |
1440 | #define LAST_TYPE(Class) TypeLast = Class |
1441 | #define ABSTRACT_TYPE(Class, Base) |
1442 | #include "clang/AST/TypeNodes.inc" |
1443 | }; |
1444 | |
1445 | private: |
1446 | /// Bitfields required by the Type class. |
1447 | class TypeBitfields { |
1448 | friend class Type; |
1449 | template <class T> friend class TypePropertyCache; |
1450 | |
1451 | /// TypeClass bitfield - Enum that specifies what subclass this belongs to. |
1452 | unsigned TC : 8; |
1453 | |
1454 | /// Whether this type is a dependent type (C++ [temp.dep.type]). |
1455 | unsigned Dependent : 1; |
1456 | |
1457 | /// Whether this type somehow involves a template parameter, even |
1458 | /// if the resolution of the type does not depend on a template parameter. |
1459 | unsigned InstantiationDependent : 1; |
1460 | |
1461 | /// Whether this type is a variably-modified type (C99 6.7.5). |
1462 | unsigned VariablyModified : 1; |
1463 | |
1464 | /// Whether this type contains an unexpanded parameter pack |
1465 | /// (for C++11 variadic templates). |
1466 | unsigned ContainsUnexpandedParameterPack : 1; |
1467 | |
1468 | /// True if the cache (i.e. the bitfields here starting with |
1469 | /// 'Cache') is valid. |
1470 | mutable unsigned CacheValid : 1; |
1471 | |
1472 | /// Linkage of this type. |
1473 | mutable unsigned CachedLinkage : 3; |
1474 | |
1475 | /// Whether this type involves and local or unnamed types. |
1476 | mutable unsigned CachedLocalOrUnnamed : 1; |
1477 | |
1478 | /// Whether this type comes from an AST file. |
1479 | mutable unsigned FromAST : 1; |
1480 | |
1481 | bool isCacheValid() const { |
1482 | return CacheValid; |
1483 | } |
1484 | |
1485 | Linkage getLinkage() const { |
1486 | assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache" ) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1486, __PRETTY_FUNCTION__)); |
1487 | return static_cast<Linkage>(CachedLinkage); |
1488 | } |
1489 | |
1490 | bool hasLocalOrUnnamedType() const { |
1491 | assert(isCacheValid() && "getting linkage from invalid cache")((isCacheValid() && "getting linkage from invalid cache" ) ? static_cast<void> (0) : __assert_fail ("isCacheValid() && \"getting linkage from invalid cache\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 1491, __PRETTY_FUNCTION__)); |
1492 | return CachedLocalOrUnnamed; |
1493 | } |
1494 | }; |
1495 | enum { NumTypeBits = 18 }; |
1496 | |
1497 | protected: |
1498 | // These classes allow subclasses to somewhat cleanly pack bitfields |
1499 | // into Type. |
1500 | |
1501 | class ArrayTypeBitfields { |
1502 | friend class ArrayType; |
1503 | |
1504 | unsigned : NumTypeBits; |
1505 | |
1506 | /// CVR qualifiers from declarations like |
1507 | /// 'int X[static restrict 4]'. For function parameters only. |
1508 | unsigned IndexTypeQuals : 3; |
1509 | |
1510 | /// Storage class qualifiers from declarations like |
1511 | /// 'int X[static restrict 4]'. For function parameters only. |
1512 | /// Actually an ArrayType::ArraySizeModifier. |
1513 | unsigned SizeModifier : 3; |
1514 | }; |
1515 | |
1516 | class BuiltinTypeBitfields { |
1517 | friend class BuiltinType; |
1518 | |
1519 | unsigned : NumTypeBits; |
1520 | |
1521 | /// The kind (BuiltinType::Kind) of builtin type this is. |
1522 | unsigned Kind : 8; |
1523 | }; |
1524 | |
1525 | /// FunctionTypeBitfields store various bits belonging to FunctionProtoType. |
1526 | /// Only common bits are stored here. Additional uncommon bits are stored |
1527 | /// in a trailing object after FunctionProtoType. |
1528 | class FunctionTypeBitfields { |
1529 | friend class FunctionProtoType; |
1530 | friend class FunctionType; |
1531 | |
1532 | unsigned : NumTypeBits; |
1533 | |
1534 | /// Extra information which affects how the function is called, like |
1535 | /// regparm and the calling convention. |
1536 | unsigned ExtInfo : 12; |
1537 | |
1538 | /// The ref-qualifier associated with a \c FunctionProtoType. |
1539 | /// |
1540 | /// This is a value of type \c RefQualifierKind. |
1541 | unsigned RefQualifier : 2; |
1542 | |
1543 | /// Used only by FunctionProtoType, put here to pack with the |
1544 | /// other bitfields. |
1545 | /// The qualifiers are part of FunctionProtoType because... |
1546 | /// |
1547 | /// C++ 8.3.5p4: The return type, the parameter type list and the |
1548 | /// cv-qualifier-seq, [...], are part of the function type. |
1549 | unsigned FastTypeQuals : Qualifiers::FastWidth; |
1550 | /// Whether this function has extended Qualifiers. |
1551 | unsigned HasExtQuals : 1; |
1552 | |
1553 | /// The number of parameters this function has, not counting '...'. |
1554 | /// According to [implimits] 8 bits should be enough here but this is |
1555 | /// somewhat easy to exceed with metaprogramming and so we would like to |
1556 | /// keep NumParams as wide as reasonably possible. |
1557 | unsigned NumParams : 16; |
1558 | |
1559 | /// The type of exception specification this function has. |
1560 | unsigned ExceptionSpecType : 4; |
1561 | |
1562 | /// Whether this function has extended parameter information. |
1563 | unsigned HasExtParameterInfos : 1; |
1564 | |
1565 | /// Whether the function is variadic. |
1566 | unsigned Variadic : 1; |
1567 | |
1568 | /// Whether this function has a trailing return type. |
1569 | unsigned HasTrailingReturn : 1; |
1570 | }; |
1571 | |
1572 | class ObjCObjectTypeBitfields { |
1573 | friend class ObjCObjectType; |
1574 | |
1575 | unsigned : NumTypeBits; |
1576 | |
1577 | /// The number of type arguments stored directly on this object type. |
1578 | unsigned NumTypeArgs : 7; |
1579 | |
1580 | /// The number of protocols stored directly on this object type. |
1581 | unsigned NumProtocols : 6; |
1582 | |
1583 | /// Whether this is a "kindof" type. |
1584 | unsigned IsKindOf : 1; |
1585 | }; |
1586 | |
1587 | class ReferenceTypeBitfields { |
1588 | friend class ReferenceType; |
1589 | |
1590 | unsigned : NumTypeBits; |
1591 | |
1592 | /// True if the type was originally spelled with an lvalue sigil. |
1593 | /// This is never true of rvalue references but can also be false |
1594 | /// on lvalue references because of C++0x [dcl.typedef]p9, |
1595 | /// as follows: |
1596 | /// |
1597 | /// typedef int &ref; // lvalue, spelled lvalue |
1598 | /// typedef int &&rvref; // rvalue |
1599 | /// ref &a; // lvalue, inner ref, spelled lvalue |
1600 | /// ref &&a; // lvalue, inner ref |
1601 | /// rvref &a; // lvalue, inner ref, spelled lvalue |
1602 | /// rvref &&a; // rvalue, inner ref |
1603 | unsigned SpelledAsLValue : 1; |
1604 | |
1605 | /// True if the inner type is a reference type. This only happens |
1606 | /// in non-canonical forms. |
1607 | unsigned InnerRef : 1; |
1608 | }; |
1609 | |
1610 | class TypeWithKeywordBitfields { |
1611 | friend class TypeWithKeyword; |
1612 | |
1613 | unsigned : NumTypeBits; |
1614 | |
1615 | /// An ElaboratedTypeKeyword. 8 bits for efficient access. |
1616 | unsigned Keyword : 8; |
1617 | }; |
1618 | |
1619 | enum { NumTypeWithKeywordBits = 8 }; |
1620 | |
1621 | class ElaboratedTypeBitfields { |
1622 | friend class ElaboratedType; |
1623 | |
1624 | unsigned : NumTypeBits; |
1625 | unsigned : NumTypeWithKeywordBits; |
1626 | |
1627 | /// Whether the ElaboratedType has a trailing OwnedTagDecl. |
1628 | unsigned HasOwnedTagDecl : 1; |
1629 | }; |
1630 | |
1631 | class VectorTypeBitfields { |
1632 | friend class VectorType; |
1633 | friend class DependentVectorType; |
1634 | |
1635 | unsigned : NumTypeBits; |
1636 | |
1637 | /// The kind of vector, either a generic vector type or some |
1638 | /// target-specific vector type such as for AltiVec or Neon. |
1639 | unsigned VecKind : 3; |
1640 | |
1641 | /// The number of elements in the vector. |
1642 | unsigned NumElements : 29 - NumTypeBits; |
1643 | |
1644 | enum { MaxNumElements = (1 << (29 - NumTypeBits)) - 1 }; |
1645 | }; |
1646 | |
1647 | class AttributedTypeBitfields { |
1648 | friend class AttributedType; |
1649 | |
1650 | unsigned : NumTypeBits; |
1651 | |
1652 | /// An AttributedType::Kind |
1653 | unsigned AttrKind : 32 - NumTypeBits; |
1654 | }; |
1655 | |
1656 | class AutoTypeBitfields { |
1657 | friend class AutoType; |
1658 | |
1659 | unsigned : NumTypeBits; |
1660 | |
1661 | /// Was this placeholder type spelled as 'auto', 'decltype(auto)', |
1662 | /// or '__auto_type'? AutoTypeKeyword value. |
1663 | unsigned Keyword : 2; |
1664 | }; |
1665 | |
1666 | class SubstTemplateTypeParmPackTypeBitfields { |
1667 | friend class SubstTemplateTypeParmPackType; |
1668 | |
1669 | unsigned : NumTypeBits; |
1670 | |
1671 | /// The number of template arguments in \c Arguments, which is |
1672 | /// expected to be able to hold at least 1024 according to [implimits]. |
1673 | /// However as this limit is somewhat easy to hit with template |
1674 | /// metaprogramming we'd prefer to keep it as large as possible. |
1675 | /// At the moment it has been left as a non-bitfield since this type |
1676 | /// safely fits in 64 bits as an unsigned, so there is no reason to |
1677 | /// introduce the performance impact of a bitfield. |
1678 | unsigned NumArgs; |
1679 | }; |
1680 | |
1681 | class TemplateSpecializationTypeBitfields { |
1682 | friend class TemplateSpecializationType; |
1683 | |
1684 | unsigned : NumTypeBits; |
1685 | |
1686 | /// Whether this template specialization type is a substituted type alias. |
1687 | unsigned TypeAlias : 1; |
1688 | |
1689 | /// The number of template arguments named in this class template |
1690 | /// specialization, which is expected to be able to hold at least 1024 |
1691 | /// according to [implimits]. However, as this limit is somewhat easy to |
1692 | /// hit with template metaprogramming we'd prefer to keep it as large |
1693 | /// as possible. At the moment it has been left as a non-bitfield since |
1694 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1695 | /// to introduce the performance impact of a bitfield. |
1696 | unsigned NumArgs; |
1697 | }; |
1698 | |
1699 | class DependentTemplateSpecializationTypeBitfields { |
1700 | friend class DependentTemplateSpecializationType; |
1701 | |
1702 | unsigned : NumTypeBits; |
1703 | unsigned : NumTypeWithKeywordBits; |
1704 | |
1705 | /// The number of template arguments named in this class template |
1706 | /// specialization, which is expected to be able to hold at least 1024 |
1707 | /// according to [implimits]. However, as this limit is somewhat easy to |
1708 | /// hit with template metaprogramming we'd prefer to keep it as large |
1709 | /// as possible. At the moment it has been left as a non-bitfield since |
1710 | /// this type safely fits in 64 bits as an unsigned, so there is no reason |
1711 | /// to introduce the performance impact of a bitfield. |
1712 | unsigned NumArgs; |
1713 | }; |
1714 | |
1715 | class PackExpansionTypeBitfields { |
1716 | friend class PackExpansionType; |
1717 | |
1718 | unsigned : NumTypeBits; |
1719 | |
1720 | /// The number of expansions that this pack expansion will |
1721 | /// generate when substituted (+1), which is expected to be able to |
1722 | /// hold at least 1024 according to [implimits]. However, as this limit |
1723 | /// is somewhat easy to hit with template metaprogramming we'd prefer to |
1724 | /// keep it as large as possible. At the moment it has been left as a |
1725 | /// non-bitfield since this type safely fits in 64 bits as an unsigned, so |
1726 | /// there is no reason to introduce the performance impact of a bitfield. |
1727 | /// |
1728 | /// This field will only have a non-zero value when some of the parameter |
1729 | /// packs that occur within the pattern have been substituted but others |
1730 | /// have not. |
1731 | unsigned NumExpansions; |
1732 | }; |
1733 | |
1734 | union { |
1735 | TypeBitfields TypeBits; |
1736 | ArrayTypeBitfields ArrayTypeBits; |
1737 | AttributedTypeBitfields AttributedTypeBits; |
1738 | AutoTypeBitfields AutoTypeBits; |
1739 | BuiltinTypeBitfields BuiltinTypeBits; |
1740 | FunctionTypeBitfields FunctionTypeBits; |
1741 | ObjCObjectTypeBitfields ObjCObjectTypeBits; |
1742 | ReferenceTypeBitfields ReferenceTypeBits; |
1743 | TypeWithKeywordBitfields TypeWithKeywordBits; |
1744 | ElaboratedTypeBitfields ElaboratedTypeBits; |
1745 | VectorTypeBitfields VectorTypeBits; |
1746 | SubstTemplateTypeParmPackTypeBitfields SubstTemplateTypeParmPackTypeBits; |
1747 | TemplateSpecializationTypeBitfields TemplateSpecializationTypeBits; |
1748 | DependentTemplateSpecializationTypeBitfields |
1749 | DependentTemplateSpecializationTypeBits; |
1750 | PackExpansionTypeBitfields PackExpansionTypeBits; |
1751 | |
1752 | static_assert(sizeof(TypeBitfields) <= 8, |
1753 | "TypeBitfields is larger than 8 bytes!"); |
1754 | static_assert(sizeof(ArrayTypeBitfields) <= 8, |
1755 | "ArrayTypeBitfields is larger than 8 bytes!"); |
1756 | static_assert(sizeof(AttributedTypeBitfields) <= 8, |
1757 | "AttributedTypeBitfields is larger than 8 bytes!"); |
1758 | static_assert(sizeof(AutoTypeBitfields) <= 8, |
1759 | "AutoTypeBitfields is larger than 8 bytes!"); |
1760 | static_assert(sizeof(BuiltinTypeBitfields) <= 8, |
1761 | "BuiltinTypeBitfields is larger than 8 bytes!"); |
1762 | static_assert(sizeof(FunctionTypeBitfields) <= 8, |
1763 | "FunctionTypeBitfields is larger than 8 bytes!"); |
1764 | static_assert(sizeof(ObjCObjectTypeBitfields) <= 8, |
1765 | "ObjCObjectTypeBitfields is larger than 8 bytes!"); |
1766 | static_assert(sizeof(ReferenceTypeBitfields) <= 8, |
1767 | "ReferenceTypeBitfields is larger than 8 bytes!"); |
1768 | static_assert(sizeof(TypeWithKeywordBitfields) <= 8, |
1769 | "TypeWithKeywordBitfields is larger than 8 bytes!"); |
1770 | static_assert(sizeof(ElaboratedTypeBitfields) <= 8, |
1771 | "ElaboratedTypeBitfields is larger than 8 bytes!"); |
1772 | static_assert(sizeof(VectorTypeBitfields) <= 8, |
1773 | "VectorTypeBitfields is larger than 8 bytes!"); |
1774 | static_assert(sizeof(SubstTemplateTypeParmPackTypeBitfields) <= 8, |
1775 | "SubstTemplateTypeParmPackTypeBitfields is larger" |
1776 | " than 8 bytes!"); |
1777 | static_assert(sizeof(TemplateSpecializationTypeBitfields) <= 8, |
1778 | "TemplateSpecializationTypeBitfields is larger" |
1779 | " than 8 bytes!"); |
1780 | static_assert(sizeof(DependentTemplateSpecializationTypeBitfields) <= 8, |
1781 | "DependentTemplateSpecializationTypeBitfields is larger" |
1782 | " than 8 bytes!"); |
1783 | static_assert(sizeof(PackExpansionTypeBitfields) <= 8, |
1784 | "PackExpansionTypeBitfields is larger than 8 bytes"); |
1785 | }; |
1786 | |
1787 | private: |
1788 | template <class T> friend class TypePropertyCache; |
1789 | |
1790 | /// Set whether this type comes from an AST file. |
1791 | void setFromAST(bool V = true) const { |
1792 | TypeBits.FromAST = V; |
1793 | } |
1794 | |
1795 | protected: |
1796 | friend class ASTContext; |
1797 | |
1798 | Type(TypeClass tc, QualType canon, bool Dependent, |
1799 | bool InstantiationDependent, bool VariablyModified, |
1800 | bool ContainsUnexpandedParameterPack) |
1801 | : ExtQualsTypeCommonBase(this, |
1802 | canon.isNull() ? QualType(this_(), 0) : canon) { |
1803 | TypeBits.TC = tc; |
1804 | TypeBits.Dependent = Dependent; |
1805 | TypeBits.InstantiationDependent = Dependent || InstantiationDependent; |
1806 | TypeBits.VariablyModified = VariablyModified; |
1807 | TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack; |
1808 | TypeBits.CacheValid = false; |
1809 | TypeBits.CachedLocalOrUnnamed = false; |
1810 | TypeBits.CachedLinkage = NoLinkage; |
1811 | TypeBits.FromAST = false; |
1812 | } |
1813 | |
1814 | // silence VC++ warning C4355: 'this' : used in base member initializer list |
1815 | Type *this_() { return this; } |
1816 | |
1817 | void setDependent(bool D = true) { |
1818 | TypeBits.Dependent = D; |
1819 | if (D) |
1820 | TypeBits.InstantiationDependent = true; |
1821 | } |
1822 | |
1823 | void setInstantiationDependent(bool D = true) { |
1824 | TypeBits.InstantiationDependent = D; } |
1825 | |
1826 | void setVariablyModified(bool VM = true) { TypeBits.VariablyModified = VM; } |
1827 | |
1828 | void setContainsUnexpandedParameterPack(bool PP = true) { |
1829 | TypeBits.ContainsUnexpandedParameterPack = PP; |
1830 | } |
1831 | |
1832 | public: |
1833 | friend class ASTReader; |
1834 | friend class ASTWriter; |
1835 | |
1836 | Type(const Type &) = delete; |
1837 | Type(Type &&) = delete; |
1838 | Type &operator=(const Type &) = delete; |
1839 | Type &operator=(Type &&) = delete; |
1840 | |
1841 | TypeClass getTypeClass() const { return static_cast<TypeClass>(TypeBits.TC); } |
1842 | |
1843 | /// Whether this type comes from an AST file. |
1844 | bool isFromAST() const { return TypeBits.FromAST; } |
1845 | |
1846 | /// Whether this type is or contains an unexpanded parameter |
1847 | /// pack, used to support C++0x variadic templates. |
1848 | /// |
1849 | /// A type that contains a parameter pack shall be expanded by the |
1850 | /// ellipsis operator at some point. For example, the typedef in the |
1851 | /// following example contains an unexpanded parameter pack 'T': |
1852 | /// |
1853 | /// \code |
1854 | /// template<typename ...T> |
1855 | /// struct X { |
1856 | /// typedef T* pointer_types; // ill-formed; T is a parameter pack. |
1857 | /// }; |
1858 | /// \endcode |
1859 | /// |
1860 | /// Note that this routine does not specify which |
1861 | bool containsUnexpandedParameterPack() const { |
1862 | return TypeBits.ContainsUnexpandedParameterPack; |
1863 | } |
1864 | |
1865 | /// Determines if this type would be canonical if it had no further |
1866 | /// qualification. |
1867 | bool isCanonicalUnqualified() const { |
1868 | return CanonicalType == QualType(this, 0); |
1869 | } |
1870 | |
1871 | /// Pull a single level of sugar off of this locally-unqualified type. |
1872 | /// Users should generally prefer SplitQualType::getSingleStepDesugaredType() |
1873 | /// or QualType::getSingleStepDesugaredType(const ASTContext&). |
1874 | QualType getLocallyUnqualifiedSingleStepDesugaredType() const; |
1875 | |
1876 | /// Types are partitioned into 3 broad categories (C99 6.2.5p1): |
1877 | /// object types, function types, and incomplete types. |
1878 | |
1879 | /// Return true if this is an incomplete type. |
1880 | /// A type that can describe objects, but which lacks information needed to |
1881 | /// determine its size (e.g. void, or a fwd declared struct). Clients of this |
1882 | /// routine will need to determine if the size is actually required. |
1883 | /// |
1884 | /// Def If non-null, and the type refers to some kind of declaration |
1885 | /// that can be completed (such as a C struct, C++ class, or Objective-C |
1886 | /// class), will be set to the declaration. |
1887 | bool isIncompleteType(NamedDecl **Def = nullptr) const; |
1888 | |
1889 | /// Return true if this is an incomplete or object |
1890 | /// type, in other words, not a function type. |
1891 | bool isIncompleteOrObjectType() const { |
1892 | return !isFunctionType(); |
1893 | } |
1894 | |
1895 | /// Determine whether this type is an object type. |
1896 | bool isObjectType() const { |
1897 | // C++ [basic.types]p8: |
1898 | // An object type is a (possibly cv-qualified) type that is not a |
1899 | // function type, not a reference type, and not a void type. |
1900 | return !isReferenceType() && !isFunctionType() && !isVoidType(); |
1901 | } |
1902 | |
1903 | /// Return true if this is a literal type |
1904 | /// (C++11 [basic.types]p10) |
1905 | bool isLiteralType(const ASTContext &Ctx) const; |
1906 | |
1907 | /// Test if this type is a standard-layout type. |
1908 | /// (C++0x [basic.type]p9) |
1909 | bool isStandardLayoutType() const; |
1910 | |
1911 | /// Helper methods to distinguish type categories. All type predicates |
1912 | /// operate on the canonical type, ignoring typedefs and qualifiers. |
1913 | |
1914 | /// Returns true if the type is a builtin type. |
1915 | bool isBuiltinType() const; |
1916 | |
1917 | /// Test for a particular builtin type. |
1918 | bool isSpecificBuiltinType(unsigned K) const; |
1919 | |
1920 | /// Test for a type which does not represent an actual type-system type but |
1921 | /// is instead used as a placeholder for various convenient purposes within |
1922 | /// Clang. All such types are BuiltinTypes. |
1923 | bool isPlaceholderType() const; |
1924 | const BuiltinType *getAsPlaceholderType() const; |
1925 | |
1926 | /// Test for a specific placeholder type. |
1927 | bool isSpecificPlaceholderType(unsigned K) const; |
1928 | |
1929 | /// Test for a placeholder type other than Overload; see |
1930 | /// BuiltinType::isNonOverloadPlaceholderType. |
1931 | bool isNonOverloadPlaceholderType() const; |
1932 | |
1933 | /// isIntegerType() does *not* include complex integers (a GCC extension). |
1934 | /// isComplexIntegerType() can be used to test for complex integers. |
1935 | bool isIntegerType() const; // C99 6.2.5p17 (int, char, bool, enum) |
1936 | bool isEnumeralType() const; |
1937 | |
1938 | /// Determine whether this type is a scoped enumeration type. |
1939 | bool isScopedEnumeralType() const; |
1940 | bool isBooleanType() const; |
1941 | bool isCharType() const; |
1942 | bool isWideCharType() const; |
1943 | bool isChar8Type() const; |
1944 | bool isChar16Type() const; |
1945 | bool isChar32Type() const; |
1946 | bool isAnyCharacterType() const; |
1947 | bool isIntegralType(const ASTContext &Ctx) const; |
1948 | |
1949 | /// Determine whether this type is an integral or enumeration type. |
1950 | bool isIntegralOrEnumerationType() const; |
1951 | |
1952 | /// Determine whether this type is an integral or unscoped enumeration type. |
1953 | bool isIntegralOrUnscopedEnumerationType() const; |
1954 | |
1955 | /// Floating point categories. |
1956 | bool isRealFloatingType() const; // C99 6.2.5p10 (float, double, long double) |
1957 | /// isComplexType() does *not* include complex integers (a GCC extension). |
1958 | /// isComplexIntegerType() can be used to test for complex integers. |
1959 | bool isComplexType() const; // C99 6.2.5p11 (complex) |
1960 | bool isAnyComplexType() const; // C99 6.2.5p11 (complex) + Complex Int. |
1961 | bool isFloatingType() const; // C99 6.2.5p11 (real floating + complex) |
1962 | bool isHalfType() const; // OpenCL 6.1.1.1, NEON (IEEE 754-2008 half) |
1963 | bool isFloat16Type() const; // C11 extension ISO/IEC TS 18661 |
1964 | bool isFloat128Type() const; |
1965 | bool isRealType() const; // C99 6.2.5p17 (real floating + integer) |
1966 | bool isArithmeticType() const; // C99 6.2.5p18 (integer + floating) |
1967 | bool isVoidType() const; // C99 6.2.5p19 |
1968 | bool isScalarType() const; // C99 6.2.5p21 (arithmetic + pointers) |
1969 | bool isAggregateType() const; |
1970 | bool isFundamentalType() const; |
1971 | bool isCompoundType() const; |
1972 | |
1973 | // Type Predicates: Check to see if this type is structurally the specified |
1974 | // type, ignoring typedefs and qualifiers. |
1975 | bool isFunctionType() const; |
1976 | bool isFunctionNoProtoType() const { return getAs<FunctionNoProtoType>(); } |
1977 | bool isFunctionProtoType() const { return getAs<FunctionProtoType>(); } |
1978 | bool isPointerType() const; |
1979 | bool isAnyPointerType() const; // Any C pointer or ObjC object pointer |
1980 | bool isBlockPointerType() const; |
1981 | bool isVoidPointerType() const; |
1982 | bool isReferenceType() const; |
1983 | bool isLValueReferenceType() const; |
1984 | bool isRValueReferenceType() const; |
1985 | bool isFunctionPointerType() const; |
1986 | bool isFunctionReferenceType() const; |
1987 | bool isMemberPointerType() const; |
1988 | bool isMemberFunctionPointerType() const; |
1989 | bool isMemberDataPointerType() const; |
1990 | bool isArrayType() const; |
1991 | bool isConstantArrayType() const; |
1992 | bool isIncompleteArrayType() const; |
1993 | bool isVariableArrayType() const; |
1994 | bool isDependentSizedArrayType() const; |
1995 | bool isRecordType() const; |
1996 | bool isClassType() const; |
1997 | bool isStructureType() const; |
1998 | bool isObjCBoxableRecordType() const; |
1999 | bool isInterfaceType() const; |
2000 | bool isStructureOrClassType() const; |
2001 | bool isUnionType() const; |
2002 | bool isComplexIntegerType() const; // GCC _Complex integer type. |
2003 | bool isVectorType() const; // GCC vector type. |
2004 | bool isExtVectorType() const; // Extended vector type. |
2005 | bool isDependentAddressSpaceType() const; // value-dependent address space qualifier |
2006 | bool isObjCObjectPointerType() const; // pointer to ObjC object |
2007 | bool isObjCRetainableType() const; // ObjC object or block pointer |
2008 | bool isObjCLifetimeType() const; // (array of)* retainable type |
2009 | bool isObjCIndirectLifetimeType() const; // (pointer to)* lifetime type |
2010 | bool isObjCNSObjectType() const; // __attribute__((NSObject)) |
2011 | bool isObjCIndependentClassType() const; // __attribute__((objc_independent_class)) |
2012 | // FIXME: change this to 'raw' interface type, so we can used 'interface' type |
2013 | // for the common case. |
2014 | bool isObjCObjectType() const; // NSString or typeof(*(id)0) |
2015 | bool isObjCQualifiedInterfaceType() const; // NSString<foo> |
2016 | bool isObjCQualifiedIdType() const; // id<foo> |
2017 | bool isObjCQualifiedClassType() const; // Class<foo> |
2018 | bool isObjCObjectOrInterfaceType() const; |
2019 | bool isObjCIdType() const; // id |
2020 | bool isDecltypeType() const; |
2021 | /// Was this type written with the special inert-in-ARC __unsafe_unretained |
2022 | /// qualifier? |
2023 | /// |
2024 | /// This approximates the answer to the following question: if this |
2025 | /// translation unit were compiled in ARC, would this type be qualified |
2026 | /// with __unsafe_unretained? |
2027 | bool isObjCInertUnsafeUnretainedType() const { |
2028 | return hasAttr(attr::ObjCInertUnsafeUnretained); |
2029 | } |
2030 | |
2031 | /// Whether the type is Objective-C 'id' or a __kindof type of an |
2032 | /// object type, e.g., __kindof NSView * or __kindof id |
2033 | /// <NSCopying>. |
2034 | /// |
2035 | /// \param bound Will be set to the bound on non-id subtype types, |
2036 | /// which will be (possibly specialized) Objective-C class type, or |
2037 | /// null for 'id. |
2038 | bool isObjCIdOrObjectKindOfType(const ASTContext &ctx, |
2039 | const ObjCObjectType *&bound) const; |
2040 | |
2041 | bool isObjCClassType() const; // Class |
2042 | |
2043 | /// Whether the type is Objective-C 'Class' or a __kindof type of an |
2044 | /// Class type, e.g., __kindof Class <NSCopying>. |
2045 | /// |
2046 | /// Unlike \c isObjCIdOrObjectKindOfType, there is no relevant bound |
2047 | /// here because Objective-C's type system cannot express "a class |
2048 | /// object for a subclass of NSFoo". |
2049 | bool isObjCClassOrClassKindOfType() const; |
2050 | |
2051 | bool isBlockCompatibleObjCPointerType(ASTContext &ctx) const; |
2052 | bool isObjCSelType() const; // Class |
2053 | bool isObjCBuiltinType() const; // 'id' or 'Class' |
2054 | bool isObjCARCBridgableType() const; |
2055 | bool isCARCBridgableType() const; |
2056 | bool isTemplateTypeParmType() const; // C++ template type parameter |
2057 | bool isNullPtrType() const; // C++11 std::nullptr_t |
2058 | bool isNothrowT() const; // C++ std::nothrow_t |
2059 | bool isAlignValT() const; // C++17 std::align_val_t |
2060 | bool isStdByteType() const; // C++17 std::byte |
2061 | bool isAtomicType() const; // C11 _Atomic() |
2062 | |
2063 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
2064 | bool is##Id##Type() const; |
2065 | #include "clang/Basic/OpenCLImageTypes.def" |
2066 | |
2067 | bool isImageType() const; // Any OpenCL image type |
2068 | |
2069 | bool isSamplerT() const; // OpenCL sampler_t |
2070 | bool isEventT() const; // OpenCL event_t |
2071 | bool isClkEventT() const; // OpenCL clk_event_t |
2072 | bool isQueueT() const; // OpenCL queue_t |
2073 | bool isReserveIDT() const; // OpenCL reserve_id_t |
2074 | |
2075 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
2076 | bool is##Id##Type() const; |
2077 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2078 | // Type defined in cl_intel_device_side_avc_motion_estimation OpenCL extension |
2079 | bool isOCLIntelSubgroupAVCType() const; |
2080 | bool isOCLExtOpaqueType() const; // Any OpenCL extension type |
2081 | |
2082 | bool isPipeType() const; // OpenCL pipe type |
2083 | bool isOpenCLSpecificType() const; // Any OpenCL specific type |
2084 | |
2085 | /// Determines if this type, which must satisfy |
2086 | /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather |
2087 | /// than implicitly __strong. |
2088 | bool isObjCARCImplicitlyUnretainedType() const; |
2089 | |
2090 | /// Return the implicit lifetime for this type, which must not be dependent. |
2091 | Qualifiers::ObjCLifetime getObjCARCImplicitLifetime() const; |
2092 | |
2093 | enum ScalarTypeKind { |
2094 | STK_CPointer, |
2095 | STK_BlockPointer, |
2096 | STK_ObjCObjectPointer, |
2097 | STK_MemberPointer, |
2098 | STK_Bool, |
2099 | STK_Integral, |
2100 | STK_Floating, |
2101 | STK_IntegralComplex, |
2102 | STK_FloatingComplex, |
2103 | STK_FixedPoint |
2104 | }; |
2105 | |
2106 | /// Given that this is a scalar type, classify it. |
2107 | ScalarTypeKind getScalarTypeKind() const; |
2108 | |
2109 | /// Whether this type is a dependent type, meaning that its definition |
2110 | /// somehow depends on a template parameter (C++ [temp.dep.type]). |
2111 | bool isDependentType() const { return TypeBits.Dependent; } |
2112 | |
2113 | /// Determine whether this type is an instantiation-dependent type, |
2114 | /// meaning that the type involves a template parameter (even if the |
2115 | /// definition does not actually depend on the type substituted for that |
2116 | /// template parameter). |
2117 | bool isInstantiationDependentType() const { |
2118 | return TypeBits.InstantiationDependent; |
2119 | } |
2120 | |
2121 | /// Determine whether this type is an undeduced type, meaning that |
2122 | /// it somehow involves a C++11 'auto' type or similar which has not yet been |
2123 | /// deduced. |
2124 | bool isUndeducedType() const; |
2125 | |
2126 | /// Whether this type is a variably-modified type (C99 6.7.5). |
2127 | bool isVariablyModifiedType() const { return TypeBits.VariablyModified; } |
2128 | |
2129 | /// Whether this type involves a variable-length array type |
2130 | /// with a definite size. |
2131 | bool hasSizedVLAType() const; |
2132 | |
2133 | /// Whether this type is or contains a local or unnamed type. |
2134 | bool hasUnnamedOrLocalType() const; |
2135 | |
2136 | bool isOverloadableType() const; |
2137 | |
2138 | /// Determine wither this type is a C++ elaborated-type-specifier. |
2139 | bool isElaboratedTypeSpecifier() const; |
2140 | |
2141 | bool canDecayToPointerType() const; |
2142 | |
2143 | /// Whether this type is represented natively as a pointer. This includes |
2144 | /// pointers, references, block pointers, and Objective-C interface, |
2145 | /// qualified id, and qualified interface types, as well as nullptr_t. |
2146 | bool hasPointerRepresentation() const; |
2147 | |
2148 | /// Whether this type can represent an objective pointer type for the |
2149 | /// purpose of GC'ability |
2150 | bool hasObjCPointerRepresentation() const; |
2151 | |
2152 | /// Determine whether this type has an integer representation |
2153 | /// of some sort, e.g., it is an integer type or a vector. |
2154 | bool hasIntegerRepresentation() const; |
2155 | |
2156 | /// Determine whether this type has an signed integer representation |
2157 | /// of some sort, e.g., it is an signed integer type or a vector. |
2158 | bool hasSignedIntegerRepresentation() const; |
2159 | |
2160 | /// Determine whether this type has an unsigned integer representation |
2161 | /// of some sort, e.g., it is an unsigned integer type or a vector. |
2162 | bool hasUnsignedIntegerRepresentation() const; |
2163 | |
2164 | /// Determine whether this type has a floating-point representation |
2165 | /// of some sort, e.g., it is a floating-point type or a vector thereof. |
2166 | bool hasFloatingRepresentation() const; |
2167 | |
2168 | // Type Checking Functions: Check to see if this type is structurally the |
2169 | // specified type, ignoring typedefs and qualifiers, and return a pointer to |
2170 | // the best type we can. |
2171 | const RecordType *getAsStructureType() const; |
2172 | /// NOTE: getAs*ArrayType are methods on ASTContext. |
2173 | const RecordType *getAsUnionType() const; |
2174 | const ComplexType *getAsComplexIntegerType() const; // GCC complex int type. |
2175 | const ObjCObjectType *getAsObjCInterfaceType() const; |
2176 | |
2177 | // The following is a convenience method that returns an ObjCObjectPointerType |
2178 | // for object declared using an interface. |
2179 | const ObjCObjectPointerType *getAsObjCInterfacePointerType() const; |
2180 | const ObjCObjectPointerType *getAsObjCQualifiedIdType() const; |
2181 | const ObjCObjectPointerType *getAsObjCQualifiedClassType() const; |
2182 | const ObjCObjectType *getAsObjCQualifiedInterfaceType() const; |
2183 | |
2184 | /// Retrieves the CXXRecordDecl that this type refers to, either |
2185 | /// because the type is a RecordType or because it is the injected-class-name |
2186 | /// type of a class template or class template partial specialization. |
2187 | CXXRecordDecl *getAsCXXRecordDecl() const; |
2188 | |
2189 | /// Retrieves the RecordDecl this type refers to. |
2190 | RecordDecl *getAsRecordDecl() const; |
2191 | |
2192 | /// Retrieves the TagDecl that this type refers to, either |
2193 | /// because the type is a TagType or because it is the injected-class-name |
2194 | /// type of a class template or class template partial specialization. |
2195 | TagDecl *getAsTagDecl() const; |
2196 | |
2197 | /// If this is a pointer or reference to a RecordType, return the |
2198 | /// CXXRecordDecl that the type refers to. |
2199 | /// |
2200 | /// If this is not a pointer or reference, or the type being pointed to does |
2201 | /// not refer to a CXXRecordDecl, returns NULL. |
2202 | const CXXRecordDecl *getPointeeCXXRecordDecl() const; |
2203 | |
2204 | /// Get the DeducedType whose type will be deduced for a variable with |
2205 | /// an initializer of this type. This looks through declarators like pointer |
2206 | /// types, but not through decltype or typedefs. |
2207 | DeducedType *getContainedDeducedType() const; |
2208 | |
2209 | /// Get the AutoType whose type will be deduced for a variable with |
2210 | /// an initializer of this type. This looks through declarators like pointer |
2211 | /// types, but not through decltype or typedefs. |
2212 | AutoType *getContainedAutoType() const { |
2213 | return dyn_cast_or_null<AutoType>(getContainedDeducedType()); |
2214 | } |
2215 | |
2216 | /// Determine whether this type was written with a leading 'auto' |
2217 | /// corresponding to a trailing return type (possibly for a nested |
2218 | /// function type within a pointer to function type or similar). |
2219 | bool hasAutoForTrailingReturnType() const; |
2220 | |
2221 | /// Member-template getAs<specific type>'. Look through sugar for |
2222 | /// an instance of \<specific type>. This scheme will eventually |
2223 | /// replace the specific getAsXXXX methods above. |
2224 | /// |
2225 | /// There are some specializations of this member template listed |
2226 | /// immediately following this class. |
2227 | template <typename T> const T *getAs() const; |
2228 | |
2229 | /// Member-template getAsAdjusted<specific type>. Look through specific kinds |
2230 | /// of sugar (parens, attributes, etc) for an instance of \<specific type>. |
2231 | /// This is used when you need to walk over sugar nodes that represent some |
2232 | /// kind of type adjustment from a type that was written as a \<specific type> |
2233 | /// to another type that is still canonically a \<specific type>. |
2234 | template <typename T> const T *getAsAdjusted() const; |
2235 | |
2236 | /// A variant of getAs<> for array types which silently discards |
2237 | /// qualifiers from the outermost type. |
2238 | const ArrayType *getAsArrayTypeUnsafe() const; |
2239 | |
2240 | /// Member-template castAs<specific type>. Look through sugar for |
2241 | /// the underlying instance of \<specific type>. |
2242 | /// |
2243 | /// This method has the same relationship to getAs<T> as cast<T> has |
2244 | /// to dyn_cast<T>; which is to say, the underlying type *must* |
2245 | /// have the intended type, and this method will never return null. |
2246 | template <typename T> const T *castAs() const; |
2247 | |
2248 | /// A variant of castAs<> for array type which silently discards |
2249 | /// qualifiers from the outermost type. |
2250 | const ArrayType *castAsArrayTypeUnsafe() const; |
2251 | |
2252 | /// Determine whether this type had the specified attribute applied to it |
2253 | /// (looking through top-level type sugar). |
2254 | bool hasAttr(attr::Kind AK) const; |
2255 | |
2256 | /// Get the base element type of this type, potentially discarding type |
2257 | /// qualifiers. This should never be used when type qualifiers |
2258 | /// are meaningful. |
2259 | const Type *getBaseElementTypeUnsafe() const; |
2260 | |
2261 | /// If this is an array type, return the element type of the array, |
2262 | /// potentially with type qualifiers missing. |
2263 | /// This should never be used when type qualifiers are meaningful. |
2264 | const Type *getArrayElementTypeNoTypeQual() const; |
2265 | |
2266 | /// If this is a pointer type, return the pointee type. |
2267 | /// If this is an array type, return the array element type. |
2268 | /// This should never be used when type qualifiers are meaningful. |
2269 | const Type *getPointeeOrArrayElementType() const; |
2270 | |
2271 | /// If this is a pointer, ObjC object pointer, or block |
2272 | /// pointer, this returns the respective pointee. |
2273 | QualType getPointeeType() const; |
2274 | |
2275 | /// Return the specified type with any "sugar" removed from the type, |
2276 | /// removing any typedefs, typeofs, etc., as well as any qualifiers. |
2277 | const Type *getUnqualifiedDesugaredType() const; |
2278 | |
2279 | /// More type predicates useful for type checking/promotion |
2280 | bool isPromotableIntegerType() const; // C99 6.3.1.1p2 |
2281 | |
2282 | /// Return true if this is an integer type that is |
2283 | /// signed, according to C99 6.2.5p4 [char, signed char, short, int, long..], |
2284 | /// or an enum decl which has a signed representation. |
2285 | bool isSignedIntegerType() const; |
2286 | |
2287 | /// Return true if this is an integer type that is |
2288 | /// unsigned, according to C99 6.2.5p6 [which returns true for _Bool], |
2289 | /// or an enum decl which has an unsigned representation. |
2290 | bool isUnsignedIntegerType() const; |
2291 | |
2292 | /// Determines whether this is an integer type that is signed or an |
2293 | /// enumeration types whose underlying type is a signed integer type. |
2294 | bool isSignedIntegerOrEnumerationType() const; |
2295 | |
2296 | /// Determines whether this is an integer type that is unsigned or an |
2297 | /// enumeration types whose underlying type is a unsigned integer type. |
2298 | bool isUnsignedIntegerOrEnumerationType() const; |
2299 | |
2300 | /// Return true if this is a fixed point type according to |
2301 | /// ISO/IEC JTC1 SC22 WG14 N1169. |
2302 | bool isFixedPointType() const; |
2303 | |
2304 | /// Return true if this is a fixed point or integer type. |
2305 | bool isFixedPointOrIntegerType() const; |
2306 | |
2307 | /// Return true if this is a saturated fixed point type according to |
2308 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2309 | bool isSaturatedFixedPointType() const; |
2310 | |
2311 | /// Return true if this is a saturated fixed point type according to |
2312 | /// ISO/IEC JTC1 SC22 WG14 N1169. This type can be signed or unsigned. |
2313 | bool isUnsaturatedFixedPointType() const; |
2314 | |
2315 | /// Return true if this is a fixed point type that is signed according |
2316 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2317 | bool isSignedFixedPointType() const; |
2318 | |
2319 | /// Return true if this is a fixed point type that is unsigned according |
2320 | /// to ISO/IEC JTC1 SC22 WG14 N1169. This type can also be saturated. |
2321 | bool isUnsignedFixedPointType() const; |
2322 | |
2323 | /// Return true if this is not a variable sized type, |
2324 | /// according to the rules of C99 6.7.5p3. It is not legal to call this on |
2325 | /// incomplete types. |
2326 | bool isConstantSizeType() const; |
2327 | |
2328 | /// Returns true if this type can be represented by some |
2329 | /// set of type specifiers. |
2330 | bool isSpecifierType() const; |
2331 | |
2332 | /// Determine the linkage of this type. |
2333 | Linkage getLinkage() const; |
2334 | |
2335 | /// Determine the visibility of this type. |
2336 | Visibility getVisibility() const { |
2337 | return getLinkageAndVisibility().getVisibility(); |
2338 | } |
2339 | |
2340 | /// Return true if the visibility was explicitly set is the code. |
2341 | bool isVisibilityExplicit() const { |
2342 | return getLinkageAndVisibility().isVisibilityExplicit(); |
2343 | } |
2344 | |
2345 | /// Determine the linkage and visibility of this type. |
2346 | LinkageInfo getLinkageAndVisibility() const; |
2347 | |
2348 | /// True if the computed linkage is valid. Used for consistency |
2349 | /// checking. Should always return true. |
2350 | bool isLinkageValid() const; |
2351 | |
2352 | /// Determine the nullability of the given type. |
2353 | /// |
2354 | /// Note that nullability is only captured as sugar within the type |
2355 | /// system, not as part of the canonical type, so nullability will |
2356 | /// be lost by canonicalization and desugaring. |
2357 | Optional<NullabilityKind> getNullability(const ASTContext &context) const; |
2358 | |
2359 | /// Determine whether the given type can have a nullability |
2360 | /// specifier applied to it, i.e., if it is any kind of pointer type. |
2361 | /// |
2362 | /// \param ResultIfUnknown The value to return if we don't yet know whether |
2363 | /// this type can have nullability because it is dependent. |
2364 | bool canHaveNullability(bool ResultIfUnknown = true) const; |
2365 | |
2366 | /// Retrieve the set of substitutions required when accessing a member |
2367 | /// of the Objective-C receiver type that is declared in the given context. |
2368 | /// |
2369 | /// \c *this is the type of the object we're operating on, e.g., the |
2370 | /// receiver for a message send or the base of a property access, and is |
2371 | /// expected to be of some object or object pointer type. |
2372 | /// |
2373 | /// \param dc The declaration context for which we are building up a |
2374 | /// substitution mapping, which should be an Objective-C class, extension, |
2375 | /// category, or method within. |
2376 | /// |
2377 | /// \returns an array of type arguments that can be substituted for |
2378 | /// the type parameters of the given declaration context in any type described |
2379 | /// within that context, or an empty optional to indicate that no |
2380 | /// substitution is required. |
2381 | Optional<ArrayRef<QualType>> |
2382 | getObjCSubstitutions(const DeclContext *dc) const; |
2383 | |
2384 | /// Determines if this is an ObjC interface type that may accept type |
2385 | /// parameters. |
2386 | bool acceptsObjCTypeParams() const; |
2387 | |
2388 | const char *getTypeClassName() const; |
2389 | |
2390 | QualType getCanonicalTypeInternal() const { |
2391 | return CanonicalType; |
2392 | } |
2393 | |
2394 | CanQualType getCanonicalTypeUnqualified() const; // in CanonicalType.h |
2395 | void dump() const; |
2396 | void dump(llvm::raw_ostream &OS) const; |
2397 | }; |
2398 | |
2399 | /// This will check for a TypedefType by removing any existing sugar |
2400 | /// until it reaches a TypedefType or a non-sugared type. |
2401 | template <> const TypedefType *Type::getAs() const; |
2402 | |
2403 | /// This will check for a TemplateSpecializationType by removing any |
2404 | /// existing sugar until it reaches a TemplateSpecializationType or a |
2405 | /// non-sugared type. |
2406 | template <> const TemplateSpecializationType *Type::getAs() const; |
2407 | |
2408 | /// This will check for an AttributedType by removing any existing sugar |
2409 | /// until it reaches an AttributedType or a non-sugared type. |
2410 | template <> const AttributedType *Type::getAs() const; |
2411 | |
2412 | // We can do canonical leaf types faster, because we don't have to |
2413 | // worry about preserving child type decoration. |
2414 | #define TYPE(Class, Base) |
2415 | #define LEAF_TYPE(Class) \ |
2416 | template <> inline const Class##Type *Type::getAs() const { \ |
2417 | return dyn_cast<Class##Type>(CanonicalType); \ |
2418 | } \ |
2419 | template <> inline const Class##Type *Type::castAs() const { \ |
2420 | return cast<Class##Type>(CanonicalType); \ |
2421 | } |
2422 | #include "clang/AST/TypeNodes.inc" |
2423 | |
2424 | /// This class is used for builtin types like 'int'. Builtin |
2425 | /// types are always canonical and have a literal name field. |
2426 | class BuiltinType : public Type { |
2427 | public: |
2428 | enum Kind { |
2429 | // OpenCL image types |
2430 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) Id, |
2431 | #include "clang/Basic/OpenCLImageTypes.def" |
2432 | // OpenCL extension types |
2433 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) Id, |
2434 | #include "clang/Basic/OpenCLExtensionTypes.def" |
2435 | // SVE Types |
2436 | #define SVE_TYPE(Name, Id, SingletonId) Id, |
2437 | #include "clang/Basic/AArch64SVEACLETypes.def" |
2438 | // All other builtin types |
2439 | #define BUILTIN_TYPE(Id, SingletonId) Id, |
2440 | #define LAST_BUILTIN_TYPE(Id) LastKind = Id |
2441 | #include "clang/AST/BuiltinTypes.def" |
2442 | }; |
2443 | |
2444 | private: |
2445 | friend class ASTContext; // ASTContext creates these. |
2446 | |
2447 | BuiltinType(Kind K) |
2448 | : Type(Builtin, QualType(), /*Dependent=*/(K == Dependent), |
2449 | /*InstantiationDependent=*/(K == Dependent), |
2450 | /*VariablyModified=*/false, |
2451 | /*Unexpanded parameter pack=*/false) { |
2452 | BuiltinTypeBits.Kind = K; |
2453 | } |
2454 | |
2455 | public: |
2456 | Kind getKind() const { return static_cast<Kind>(BuiltinTypeBits.Kind); } |
2457 | StringRef getName(const PrintingPolicy &Policy) const; |
2458 | |
2459 | const char *getNameAsCString(const PrintingPolicy &Policy) const { |
2460 | // The StringRef is null-terminated. |
2461 | StringRef str = getName(Policy); |
2462 | assert(!str.empty() && str.data()[str.size()] == '\0')((!str.empty() && str.data()[str.size()] == '\0') ? static_cast <void> (0) : __assert_fail ("!str.empty() && str.data()[str.size()] == '\\0'" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 2462, __PRETTY_FUNCTION__)); |
2463 | return str.data(); |
2464 | } |
2465 | |
2466 | bool isSugared() const { return false; } |
2467 | QualType desugar() const { return QualType(this, 0); } |
2468 | |
2469 | bool isInteger() const { |
2470 | return getKind() >= Bool && getKind() <= Int128; |
2471 | } |
2472 | |
2473 | bool isSignedInteger() const { |
2474 | return getKind() >= Char_S && getKind() <= Int128; |
2475 | } |
2476 | |
2477 | bool isUnsignedInteger() const { |
2478 | return getKind() >= Bool && getKind() <= UInt128; |
2479 | } |
2480 | |
2481 | bool isFloatingPoint() const { |
2482 | return getKind() >= Half && getKind() <= Float128; |
2483 | } |
2484 | |
2485 | /// Determines whether the given kind corresponds to a placeholder type. |
2486 | static bool isPlaceholderTypeKind(Kind K) { |
2487 | return K >= Overload; |
2488 | } |
2489 | |
2490 | /// Determines whether this type is a placeholder type, i.e. a type |
2491 | /// which cannot appear in arbitrary positions in a fully-formed |
2492 | /// expression. |
2493 | bool isPlaceholderType() const { |
2494 | return isPlaceholderTypeKind(getKind()); |
2495 | } |
2496 | |
2497 | /// Determines whether this type is a placeholder type other than |
2498 | /// Overload. Most placeholder types require only syntactic |
2499 | /// information about their context in order to be resolved (e.g. |
2500 | /// whether it is a call expression), which means they can (and |
2501 | /// should) be resolved in an earlier "phase" of analysis. |
2502 | /// Overload expressions sometimes pick up further information |
2503 | /// from their context, like whether the context expects a |
2504 | /// specific function-pointer type, and so frequently need |
2505 | /// special treatment. |
2506 | bool isNonOverloadPlaceholderType() const { |
2507 | return getKind() > Overload; |
2508 | } |
2509 | |
2510 | static bool classof(const Type *T) { return T->getTypeClass() == Builtin; } |
2511 | }; |
2512 | |
2513 | /// Complex values, per C99 6.2.5p11. This supports the C99 complex |
2514 | /// types (_Complex float etc) as well as the GCC integer complex extensions. |
2515 | class ComplexType : public Type, public llvm::FoldingSetNode { |
2516 | friend class ASTContext; // ASTContext creates these. |
2517 | |
2518 | QualType ElementType; |
2519 | |
2520 | ComplexType(QualType Element, QualType CanonicalPtr) |
2521 | : Type(Complex, CanonicalPtr, Element->isDependentType(), |
2522 | Element->isInstantiationDependentType(), |
2523 | Element->isVariablyModifiedType(), |
2524 | Element->containsUnexpandedParameterPack()), |
2525 | ElementType(Element) {} |
2526 | |
2527 | public: |
2528 | QualType getElementType() const { return ElementType; } |
2529 | |
2530 | bool isSugared() const { return false; } |
2531 | QualType desugar() const { return QualType(this, 0); } |
2532 | |
2533 | void Profile(llvm::FoldingSetNodeID &ID) { |
2534 | Profile(ID, getElementType()); |
2535 | } |
2536 | |
2537 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Element) { |
2538 | ID.AddPointer(Element.getAsOpaquePtr()); |
2539 | } |
2540 | |
2541 | static bool classof(const Type *T) { return T->getTypeClass() == Complex; } |
2542 | }; |
2543 | |
2544 | /// Sugar for parentheses used when specifying types. |
2545 | class ParenType : public Type, public llvm::FoldingSetNode { |
2546 | friend class ASTContext; // ASTContext creates these. |
2547 | |
2548 | QualType Inner; |
2549 | |
2550 | ParenType(QualType InnerType, QualType CanonType) |
2551 | : Type(Paren, CanonType, InnerType->isDependentType(), |
2552 | InnerType->isInstantiationDependentType(), |
2553 | InnerType->isVariablyModifiedType(), |
2554 | InnerType->containsUnexpandedParameterPack()), |
2555 | Inner(InnerType) {} |
2556 | |
2557 | public: |
2558 | QualType getInnerType() const { return Inner; } |
2559 | |
2560 | bool isSugared() const { return true; } |
2561 | QualType desugar() const { return getInnerType(); } |
2562 | |
2563 | void Profile(llvm::FoldingSetNodeID &ID) { |
2564 | Profile(ID, getInnerType()); |
2565 | } |
2566 | |
2567 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Inner) { |
2568 | Inner.Profile(ID); |
2569 | } |
2570 | |
2571 | static bool classof(const Type *T) { return T->getTypeClass() == Paren; } |
2572 | }; |
2573 | |
2574 | /// PointerType - C99 6.7.5.1 - Pointer Declarators. |
2575 | class PointerType : public Type, public llvm::FoldingSetNode { |
2576 | friend class ASTContext; // ASTContext creates these. |
2577 | |
2578 | QualType PointeeType; |
2579 | |
2580 | PointerType(QualType Pointee, QualType CanonicalPtr) |
2581 | : Type(Pointer, CanonicalPtr, Pointee->isDependentType(), |
2582 | Pointee->isInstantiationDependentType(), |
2583 | Pointee->isVariablyModifiedType(), |
2584 | Pointee->containsUnexpandedParameterPack()), |
2585 | PointeeType(Pointee) {} |
2586 | |
2587 | public: |
2588 | QualType getPointeeType() const { return PointeeType; } |
2589 | |
2590 | /// Returns true if address spaces of pointers overlap. |
2591 | /// OpenCL v2.0 defines conversion rules for pointers to different |
2592 | /// address spaces (OpenCLC v2.0 s6.5.5) and notion of overlapping |
2593 | /// address spaces. |
2594 | /// CL1.1 or CL1.2: |
2595 | /// address spaces overlap iff they are they same. |
2596 | /// CL2.0 adds: |
2597 | /// __generic overlaps with any address space except for __constant. |
2598 | bool isAddressSpaceOverlapping(const PointerType &other) const { |
2599 | Qualifiers thisQuals = PointeeType.getQualifiers(); |
2600 | Qualifiers otherQuals = other.getPointeeType().getQualifiers(); |
2601 | // Address spaces overlap if at least one of them is a superset of another |
2602 | return thisQuals.isAddressSpaceSupersetOf(otherQuals) || |
2603 | otherQuals.isAddressSpaceSupersetOf(thisQuals); |
2604 | } |
2605 | |
2606 | bool isSugared() const { return false; } |
2607 | QualType desugar() const { return QualType(this, 0); } |
2608 | |
2609 | void Profile(llvm::FoldingSetNodeID &ID) { |
2610 | Profile(ID, getPointeeType()); |
2611 | } |
2612 | |
2613 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2614 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2615 | } |
2616 | |
2617 | static bool classof(const Type *T) { return T->getTypeClass() == Pointer; } |
2618 | }; |
2619 | |
2620 | /// Represents a type which was implicitly adjusted by the semantic |
2621 | /// engine for arbitrary reasons. For example, array and function types can |
2622 | /// decay, and function types can have their calling conventions adjusted. |
2623 | class AdjustedType : public Type, public llvm::FoldingSetNode { |
2624 | QualType OriginalTy; |
2625 | QualType AdjustedTy; |
2626 | |
2627 | protected: |
2628 | friend class ASTContext; // ASTContext creates these. |
2629 | |
2630 | AdjustedType(TypeClass TC, QualType OriginalTy, QualType AdjustedTy, |
2631 | QualType CanonicalPtr) |
2632 | : Type(TC, CanonicalPtr, OriginalTy->isDependentType(), |
2633 | OriginalTy->isInstantiationDependentType(), |
2634 | OriginalTy->isVariablyModifiedType(), |
2635 | OriginalTy->containsUnexpandedParameterPack()), |
2636 | OriginalTy(OriginalTy), AdjustedTy(AdjustedTy) {} |
2637 | |
2638 | public: |
2639 | QualType getOriginalType() const { return OriginalTy; } |
2640 | QualType getAdjustedType() const { return AdjustedTy; } |
2641 | |
2642 | bool isSugared() const { return true; } |
2643 | QualType desugar() const { return AdjustedTy; } |
2644 | |
2645 | void Profile(llvm::FoldingSetNodeID &ID) { |
2646 | Profile(ID, OriginalTy, AdjustedTy); |
2647 | } |
2648 | |
2649 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Orig, QualType New) { |
2650 | ID.AddPointer(Orig.getAsOpaquePtr()); |
2651 | ID.AddPointer(New.getAsOpaquePtr()); |
2652 | } |
2653 | |
2654 | static bool classof(const Type *T) { |
2655 | return T->getTypeClass() == Adjusted || T->getTypeClass() == Decayed; |
2656 | } |
2657 | }; |
2658 | |
2659 | /// Represents a pointer type decayed from an array or function type. |
2660 | class DecayedType : public AdjustedType { |
2661 | friend class ASTContext; // ASTContext creates these. |
2662 | |
2663 | inline |
2664 | DecayedType(QualType OriginalType, QualType Decayed, QualType Canonical); |
2665 | |
2666 | public: |
2667 | QualType getDecayedType() const { return getAdjustedType(); } |
2668 | |
2669 | inline QualType getPointeeType() const; |
2670 | |
2671 | static bool classof(const Type *T) { return T->getTypeClass() == Decayed; } |
2672 | }; |
2673 | |
2674 | /// Pointer to a block type. |
2675 | /// This type is to represent types syntactically represented as |
2676 | /// "void (^)(int)", etc. Pointee is required to always be a function type. |
2677 | class BlockPointerType : public Type, public llvm::FoldingSetNode { |
2678 | friend class ASTContext; // ASTContext creates these. |
2679 | |
2680 | // Block is some kind of pointer type |
2681 | QualType PointeeType; |
2682 | |
2683 | BlockPointerType(QualType Pointee, QualType CanonicalCls) |
2684 | : Type(BlockPointer, CanonicalCls, Pointee->isDependentType(), |
2685 | Pointee->isInstantiationDependentType(), |
2686 | Pointee->isVariablyModifiedType(), |
2687 | Pointee->containsUnexpandedParameterPack()), |
2688 | PointeeType(Pointee) {} |
2689 | |
2690 | public: |
2691 | // Get the pointee type. Pointee is required to always be a function type. |
2692 | QualType getPointeeType() const { return PointeeType; } |
2693 | |
2694 | bool isSugared() const { return false; } |
2695 | QualType desugar() const { return QualType(this, 0); } |
2696 | |
2697 | void Profile(llvm::FoldingSetNodeID &ID) { |
2698 | Profile(ID, getPointeeType()); |
2699 | } |
2700 | |
2701 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee) { |
2702 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2703 | } |
2704 | |
2705 | static bool classof(const Type *T) { |
2706 | return T->getTypeClass() == BlockPointer; |
2707 | } |
2708 | }; |
2709 | |
2710 | /// Base for LValueReferenceType and RValueReferenceType |
2711 | class ReferenceType : public Type, public llvm::FoldingSetNode { |
2712 | QualType PointeeType; |
2713 | |
2714 | protected: |
2715 | ReferenceType(TypeClass tc, QualType Referencee, QualType CanonicalRef, |
2716 | bool SpelledAsLValue) |
2717 | : Type(tc, CanonicalRef, Referencee->isDependentType(), |
2718 | Referencee->isInstantiationDependentType(), |
2719 | Referencee->isVariablyModifiedType(), |
2720 | Referencee->containsUnexpandedParameterPack()), |
2721 | PointeeType(Referencee) { |
2722 | ReferenceTypeBits.SpelledAsLValue = SpelledAsLValue; |
2723 | ReferenceTypeBits.InnerRef = Referencee->isReferenceType(); |
2724 | } |
2725 | |
2726 | public: |
2727 | bool isSpelledAsLValue() const { return ReferenceTypeBits.SpelledAsLValue; } |
2728 | bool isInnerRef() const { return ReferenceTypeBits.InnerRef; } |
2729 | |
2730 | QualType getPointeeTypeAsWritten() const { return PointeeType; } |
2731 | |
2732 | QualType getPointeeType() const { |
2733 | // FIXME: this might strip inner qualifiers; okay? |
2734 | const ReferenceType *T = this; |
2735 | while (T->isInnerRef()) |
2736 | T = T->PointeeType->castAs<ReferenceType>(); |
2737 | return T->PointeeType; |
2738 | } |
2739 | |
2740 | void Profile(llvm::FoldingSetNodeID &ID) { |
2741 | Profile(ID, PointeeType, isSpelledAsLValue()); |
2742 | } |
2743 | |
2744 | static void Profile(llvm::FoldingSetNodeID &ID, |
2745 | QualType Referencee, |
2746 | bool SpelledAsLValue) { |
2747 | ID.AddPointer(Referencee.getAsOpaquePtr()); |
2748 | ID.AddBoolean(SpelledAsLValue); |
2749 | } |
2750 | |
2751 | static bool classof(const Type *T) { |
2752 | return T->getTypeClass() == LValueReference || |
2753 | T->getTypeClass() == RValueReference; |
2754 | } |
2755 | }; |
2756 | |
2757 | /// An lvalue reference type, per C++11 [dcl.ref]. |
2758 | class LValueReferenceType : public ReferenceType { |
2759 | friend class ASTContext; // ASTContext creates these |
2760 | |
2761 | LValueReferenceType(QualType Referencee, QualType CanonicalRef, |
2762 | bool SpelledAsLValue) |
2763 | : ReferenceType(LValueReference, Referencee, CanonicalRef, |
2764 | SpelledAsLValue) {} |
2765 | |
2766 | public: |
2767 | bool isSugared() const { return false; } |
2768 | QualType desugar() const { return QualType(this, 0); } |
2769 | |
2770 | static bool classof(const Type *T) { |
2771 | return T->getTypeClass() == LValueReference; |
2772 | } |
2773 | }; |
2774 | |
2775 | /// An rvalue reference type, per C++11 [dcl.ref]. |
2776 | class RValueReferenceType : public ReferenceType { |
2777 | friend class ASTContext; // ASTContext creates these |
2778 | |
2779 | RValueReferenceType(QualType Referencee, QualType CanonicalRef) |
2780 | : ReferenceType(RValueReference, Referencee, CanonicalRef, false) {} |
2781 | |
2782 | public: |
2783 | bool isSugared() const { return false; } |
2784 | QualType desugar() const { return QualType(this, 0); } |
2785 | |
2786 | static bool classof(const Type *T) { |
2787 | return T->getTypeClass() == RValueReference; |
2788 | } |
2789 | }; |
2790 | |
2791 | /// A pointer to member type per C++ 8.3.3 - Pointers to members. |
2792 | /// |
2793 | /// This includes both pointers to data members and pointer to member functions. |
2794 | class MemberPointerType : public Type, public llvm::FoldingSetNode { |
2795 | friend class ASTContext; // ASTContext creates these. |
2796 | |
2797 | QualType PointeeType; |
2798 | |
2799 | /// The class of which the pointee is a member. Must ultimately be a |
2800 | /// RecordType, but could be a typedef or a template parameter too. |
2801 | const Type *Class; |
2802 | |
2803 | MemberPointerType(QualType Pointee, const Type *Cls, QualType CanonicalPtr) |
2804 | : Type(MemberPointer, CanonicalPtr, |
2805 | Cls->isDependentType() || Pointee->isDependentType(), |
2806 | (Cls->isInstantiationDependentType() || |
2807 | Pointee->isInstantiationDependentType()), |
2808 | Pointee->isVariablyModifiedType(), |
2809 | (Cls->containsUnexpandedParameterPack() || |
2810 | Pointee->containsUnexpandedParameterPack())), |
2811 | PointeeType(Pointee), Class(Cls) {} |
2812 | |
2813 | public: |
2814 | QualType getPointeeType() const { return PointeeType; } |
2815 | |
2816 | /// Returns true if the member type (i.e. the pointee type) is a |
2817 | /// function type rather than a data-member type. |
2818 | bool isMemberFunctionPointer() const { |
2819 | return PointeeType->isFunctionProtoType(); |
2820 | } |
2821 | |
2822 | /// Returns true if the member type (i.e. the pointee type) is a |
2823 | /// data type rather than a function type. |
2824 | bool isMemberDataPointer() const { |
2825 | return !PointeeType->isFunctionProtoType(); |
2826 | } |
2827 | |
2828 | const Type *getClass() const { return Class; } |
2829 | CXXRecordDecl *getMostRecentCXXRecordDecl() const; |
2830 | |
2831 | bool isSugared() const { return false; } |
2832 | QualType desugar() const { return QualType(this, 0); } |
2833 | |
2834 | void Profile(llvm::FoldingSetNodeID &ID) { |
2835 | Profile(ID, getPointeeType(), getClass()); |
2836 | } |
2837 | |
2838 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pointee, |
2839 | const Type *Class) { |
2840 | ID.AddPointer(Pointee.getAsOpaquePtr()); |
2841 | ID.AddPointer(Class); |
2842 | } |
2843 | |
2844 | static bool classof(const Type *T) { |
2845 | return T->getTypeClass() == MemberPointer; |
2846 | } |
2847 | }; |
2848 | |
2849 | /// Represents an array type, per C99 6.7.5.2 - Array Declarators. |
2850 | class ArrayType : public Type, public llvm::FoldingSetNode { |
2851 | public: |
2852 | /// Capture whether this is a normal array (e.g. int X[4]) |
2853 | /// an array with a static size (e.g. int X[static 4]), or an array |
2854 | /// with a star size (e.g. int X[*]). |
2855 | /// 'static' is only allowed on function parameters. |
2856 | enum ArraySizeModifier { |
2857 | Normal, Static, Star |
2858 | }; |
2859 | |
2860 | private: |
2861 | /// The element type of the array. |
2862 | QualType ElementType; |
2863 | |
2864 | protected: |
2865 | friend class ASTContext; // ASTContext creates these. |
2866 | |
2867 | // C++ [temp.dep.type]p1: |
2868 | // A type is dependent if it is... |
2869 | // - an array type constructed from any dependent type or whose |
2870 | // size is specified by a constant expression that is |
2871 | // value-dependent, |
2872 | ArrayType(TypeClass tc, QualType et, QualType can, |
2873 | ArraySizeModifier sm, unsigned tq, |
2874 | bool ContainsUnexpandedParameterPack) |
2875 | : Type(tc, can, et->isDependentType() || tc == DependentSizedArray, |
2876 | et->isInstantiationDependentType() || tc == DependentSizedArray, |
2877 | (tc == VariableArray || et->isVariablyModifiedType()), |
2878 | ContainsUnexpandedParameterPack), |
2879 | ElementType(et) { |
2880 | ArrayTypeBits.IndexTypeQuals = tq; |
2881 | ArrayTypeBits.SizeModifier = sm; |
2882 | } |
2883 | |
2884 | public: |
2885 | QualType getElementType() const { return ElementType; } |
2886 | |
2887 | ArraySizeModifier getSizeModifier() const { |
2888 | return ArraySizeModifier(ArrayTypeBits.SizeModifier); |
2889 | } |
2890 | |
2891 | Qualifiers getIndexTypeQualifiers() const { |
2892 | return Qualifiers::fromCVRMask(getIndexTypeCVRQualifiers()); |
2893 | } |
2894 | |
2895 | unsigned getIndexTypeCVRQualifiers() const { |
2896 | return ArrayTypeBits.IndexTypeQuals; |
2897 | } |
2898 | |
2899 | static bool classof(const Type *T) { |
2900 | return T->getTypeClass() == ConstantArray || |
2901 | T->getTypeClass() == VariableArray || |
2902 | T->getTypeClass() == IncompleteArray || |
2903 | T->getTypeClass() == DependentSizedArray; |
2904 | } |
2905 | }; |
2906 | |
2907 | /// Represents the canonical version of C arrays with a specified constant size. |
2908 | /// For example, the canonical type for 'int A[4 + 4*100]' is a |
2909 | /// ConstantArrayType where the element type is 'int' and the size is 404. |
2910 | class ConstantArrayType : public ArrayType { |
2911 | llvm::APInt Size; // Allows us to unique the type. |
2912 | |
2913 | ConstantArrayType(QualType et, QualType can, const llvm::APInt &size, |
2914 | ArraySizeModifier sm, unsigned tq) |
2915 | : ArrayType(ConstantArray, et, can, sm, tq, |
2916 | et->containsUnexpandedParameterPack()), |
2917 | Size(size) {} |
2918 | |
2919 | protected: |
2920 | friend class ASTContext; // ASTContext creates these. |
2921 | |
2922 | ConstantArrayType(TypeClass tc, QualType et, QualType can, |
2923 | const llvm::APInt &size, ArraySizeModifier sm, unsigned tq) |
2924 | : ArrayType(tc, et, can, sm, tq, et->containsUnexpandedParameterPack()), |
2925 | Size(size) {} |
2926 | |
2927 | public: |
2928 | const llvm::APInt &getSize() const { return Size; } |
2929 | bool isSugared() const { return false; } |
2930 | QualType desugar() const { return QualType(this, 0); } |
2931 | |
2932 | /// Determine the number of bits required to address a member of |
2933 | // an array with the given element type and number of elements. |
2934 | static unsigned getNumAddressingBits(const ASTContext &Context, |
2935 | QualType ElementType, |
2936 | const llvm::APInt &NumElements); |
2937 | |
2938 | /// Determine the maximum number of active bits that an array's size |
2939 | /// can require, which limits the maximum size of the array. |
2940 | static unsigned getMaxSizeBits(const ASTContext &Context); |
2941 | |
2942 | void Profile(llvm::FoldingSetNodeID &ID) { |
2943 | Profile(ID, getElementType(), getSize(), |
2944 | getSizeModifier(), getIndexTypeCVRQualifiers()); |
2945 | } |
2946 | |
2947 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, |
2948 | const llvm::APInt &ArraySize, ArraySizeModifier SizeMod, |
2949 | unsigned TypeQuals) { |
2950 | ID.AddPointer(ET.getAsOpaquePtr()); |
2951 | ID.AddInteger(ArraySize.getZExtValue()); |
2952 | ID.AddInteger(SizeMod); |
2953 | ID.AddInteger(TypeQuals); |
2954 | } |
2955 | |
2956 | static bool classof(const Type *T) { |
2957 | return T->getTypeClass() == ConstantArray; |
2958 | } |
2959 | }; |
2960 | |
2961 | /// Represents a C array with an unspecified size. For example 'int A[]' has |
2962 | /// an IncompleteArrayType where the element type is 'int' and the size is |
2963 | /// unspecified. |
2964 | class IncompleteArrayType : public ArrayType { |
2965 | friend class ASTContext; // ASTContext creates these. |
2966 | |
2967 | IncompleteArrayType(QualType et, QualType can, |
2968 | ArraySizeModifier sm, unsigned tq) |
2969 | : ArrayType(IncompleteArray, et, can, sm, tq, |
2970 | et->containsUnexpandedParameterPack()) {} |
2971 | |
2972 | public: |
2973 | friend class StmtIteratorBase; |
2974 | |
2975 | bool isSugared() const { return false; } |
2976 | QualType desugar() const { return QualType(this, 0); } |
2977 | |
2978 | static bool classof(const Type *T) { |
2979 | return T->getTypeClass() == IncompleteArray; |
2980 | } |
2981 | |
2982 | void Profile(llvm::FoldingSetNodeID &ID) { |
2983 | Profile(ID, getElementType(), getSizeModifier(), |
2984 | getIndexTypeCVRQualifiers()); |
2985 | } |
2986 | |
2987 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ET, |
2988 | ArraySizeModifier SizeMod, unsigned TypeQuals) { |
2989 | ID.AddPointer(ET.getAsOpaquePtr()); |
2990 | ID.AddInteger(SizeMod); |
2991 | ID.AddInteger(TypeQuals); |
2992 | } |
2993 | }; |
2994 | |
2995 | /// Represents a C array with a specified size that is not an |
2996 | /// integer-constant-expression. For example, 'int s[x+foo()]'. |
2997 | /// Since the size expression is an arbitrary expression, we store it as such. |
2998 | /// |
2999 | /// Note: VariableArrayType's aren't uniqued (since the expressions aren't) and |
3000 | /// should not be: two lexically equivalent variable array types could mean |
3001 | /// different things, for example, these variables do not have the same type |
3002 | /// dynamically: |
3003 | /// |
3004 | /// void foo(int x) { |
3005 | /// int Y[x]; |
3006 | /// ++x; |
3007 | /// int Z[x]; |
3008 | /// } |
3009 | class VariableArrayType : public ArrayType { |
3010 | friend class ASTContext; // ASTContext creates these. |
3011 | |
3012 | /// An assignment-expression. VLA's are only permitted within |
3013 | /// a function block. |
3014 | Stmt *SizeExpr; |
3015 | |
3016 | /// The range spanned by the left and right array brackets. |
3017 | SourceRange Brackets; |
3018 | |
3019 | VariableArrayType(QualType et, QualType can, Expr *e, |
3020 | ArraySizeModifier sm, unsigned tq, |
3021 | SourceRange brackets) |
3022 | : ArrayType(VariableArray, et, can, sm, tq, |
3023 | et->containsUnexpandedParameterPack()), |
3024 | SizeExpr((Stmt*) e), Brackets(brackets) {} |
3025 | |
3026 | public: |
3027 | friend class StmtIteratorBase; |
3028 | |
3029 | Expr *getSizeExpr() const { |
3030 | // We use C-style casts instead of cast<> here because we do not wish |
3031 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3032 | return (Expr*) SizeExpr; |
3033 | } |
3034 | |
3035 | SourceRange getBracketsRange() const { return Brackets; } |
3036 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3037 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3038 | |
3039 | bool isSugared() const { return false; } |
3040 | QualType desugar() const { return QualType(this, 0); } |
3041 | |
3042 | static bool classof(const Type *T) { |
3043 | return T->getTypeClass() == VariableArray; |
3044 | } |
3045 | |
3046 | void Profile(llvm::FoldingSetNodeID &ID) { |
3047 | llvm_unreachable("Cannot unique VariableArrayTypes.")::llvm::llvm_unreachable_internal("Cannot unique VariableArrayTypes." , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3047); |
3048 | } |
3049 | }; |
3050 | |
3051 | /// Represents an array type in C++ whose size is a value-dependent expression. |
3052 | /// |
3053 | /// For example: |
3054 | /// \code |
3055 | /// template<typename T, int Size> |
3056 | /// class array { |
3057 | /// T data[Size]; |
3058 | /// }; |
3059 | /// \endcode |
3060 | /// |
3061 | /// For these types, we won't actually know what the array bound is |
3062 | /// until template instantiation occurs, at which point this will |
3063 | /// become either a ConstantArrayType or a VariableArrayType. |
3064 | class DependentSizedArrayType : public ArrayType { |
3065 | friend class ASTContext; // ASTContext creates these. |
3066 | |
3067 | const ASTContext &Context; |
3068 | |
3069 | /// An assignment expression that will instantiate to the |
3070 | /// size of the array. |
3071 | /// |
3072 | /// The expression itself might be null, in which case the array |
3073 | /// type will have its size deduced from an initializer. |
3074 | Stmt *SizeExpr; |
3075 | |
3076 | /// The range spanned by the left and right array brackets. |
3077 | SourceRange Brackets; |
3078 | |
3079 | DependentSizedArrayType(const ASTContext &Context, QualType et, QualType can, |
3080 | Expr *e, ArraySizeModifier sm, unsigned tq, |
3081 | SourceRange brackets); |
3082 | |
3083 | public: |
3084 | friend class StmtIteratorBase; |
3085 | |
3086 | Expr *getSizeExpr() const { |
3087 | // We use C-style casts instead of cast<> here because we do not wish |
3088 | // to have a dependency of Type.h on Stmt.h/Expr.h. |
3089 | return (Expr*) SizeExpr; |
3090 | } |
3091 | |
3092 | SourceRange getBracketsRange() const { return Brackets; } |
3093 | SourceLocation getLBracketLoc() const { return Brackets.getBegin(); } |
3094 | SourceLocation getRBracketLoc() const { return Brackets.getEnd(); } |
3095 | |
3096 | bool isSugared() const { return false; } |
3097 | QualType desugar() const { return QualType(this, 0); } |
3098 | |
3099 | static bool classof(const Type *T) { |
3100 | return T->getTypeClass() == DependentSizedArray; |
3101 | } |
3102 | |
3103 | void Profile(llvm::FoldingSetNodeID &ID) { |
3104 | Profile(ID, Context, getElementType(), |
3105 | getSizeModifier(), getIndexTypeCVRQualifiers(), getSizeExpr()); |
3106 | } |
3107 | |
3108 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3109 | QualType ET, ArraySizeModifier SizeMod, |
3110 | unsigned TypeQuals, Expr *E); |
3111 | }; |
3112 | |
3113 | /// Represents an extended address space qualifier where the input address space |
3114 | /// value is dependent. Non-dependent address spaces are not represented with a |
3115 | /// special Type subclass; they are stored on an ExtQuals node as part of a QualType. |
3116 | /// |
3117 | /// For example: |
3118 | /// \code |
3119 | /// template<typename T, int AddrSpace> |
3120 | /// class AddressSpace { |
3121 | /// typedef T __attribute__((address_space(AddrSpace))) type; |
3122 | /// } |
3123 | /// \endcode |
3124 | class DependentAddressSpaceType : public Type, public llvm::FoldingSetNode { |
3125 | friend class ASTContext; |
3126 | |
3127 | const ASTContext &Context; |
3128 | Expr *AddrSpaceExpr; |
3129 | QualType PointeeType; |
3130 | SourceLocation loc; |
3131 | |
3132 | DependentAddressSpaceType(const ASTContext &Context, QualType PointeeType, |
3133 | QualType can, Expr *AddrSpaceExpr, |
3134 | SourceLocation loc); |
3135 | |
3136 | public: |
3137 | Expr *getAddrSpaceExpr() const { return AddrSpaceExpr; } |
3138 | QualType getPointeeType() const { return PointeeType; } |
3139 | SourceLocation getAttributeLoc() const { return loc; } |
3140 | |
3141 | bool isSugared() const { return false; } |
3142 | QualType desugar() const { return QualType(this, 0); } |
3143 | |
3144 | static bool classof(const Type *T) { |
3145 | return T->getTypeClass() == DependentAddressSpace; |
3146 | } |
3147 | |
3148 | void Profile(llvm::FoldingSetNodeID &ID) { |
3149 | Profile(ID, Context, getPointeeType(), getAddrSpaceExpr()); |
3150 | } |
3151 | |
3152 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3153 | QualType PointeeType, Expr *AddrSpaceExpr); |
3154 | }; |
3155 | |
3156 | /// Represents an extended vector type where either the type or size is |
3157 | /// dependent. |
3158 | /// |
3159 | /// For example: |
3160 | /// \code |
3161 | /// template<typename T, int Size> |
3162 | /// class vector { |
3163 | /// typedef T __attribute__((ext_vector_type(Size))) type; |
3164 | /// } |
3165 | /// \endcode |
3166 | class DependentSizedExtVectorType : public Type, public llvm::FoldingSetNode { |
3167 | friend class ASTContext; |
3168 | |
3169 | const ASTContext &Context; |
3170 | Expr *SizeExpr; |
3171 | |
3172 | /// The element type of the array. |
3173 | QualType ElementType; |
3174 | |
3175 | SourceLocation loc; |
3176 | |
3177 | DependentSizedExtVectorType(const ASTContext &Context, QualType ElementType, |
3178 | QualType can, Expr *SizeExpr, SourceLocation loc); |
3179 | |
3180 | public: |
3181 | Expr *getSizeExpr() const { return SizeExpr; } |
3182 | QualType getElementType() const { return ElementType; } |
3183 | SourceLocation getAttributeLoc() const { return loc; } |
3184 | |
3185 | bool isSugared() const { return false; } |
3186 | QualType desugar() const { return QualType(this, 0); } |
3187 | |
3188 | static bool classof(const Type *T) { |
3189 | return T->getTypeClass() == DependentSizedExtVector; |
3190 | } |
3191 | |
3192 | void Profile(llvm::FoldingSetNodeID &ID) { |
3193 | Profile(ID, Context, getElementType(), getSizeExpr()); |
3194 | } |
3195 | |
3196 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3197 | QualType ElementType, Expr *SizeExpr); |
3198 | }; |
3199 | |
3200 | |
3201 | /// Represents a GCC generic vector type. This type is created using |
3202 | /// __attribute__((vector_size(n)), where "n" specifies the vector size in |
3203 | /// bytes; or from an Altivec __vector or vector declaration. |
3204 | /// Since the constructor takes the number of vector elements, the |
3205 | /// client is responsible for converting the size into the number of elements. |
3206 | class VectorType : public Type, public llvm::FoldingSetNode { |
3207 | public: |
3208 | enum VectorKind { |
3209 | /// not a target-specific vector type |
3210 | GenericVector, |
3211 | |
3212 | /// is AltiVec vector |
3213 | AltiVecVector, |
3214 | |
3215 | /// is AltiVec 'vector Pixel' |
3216 | AltiVecPixel, |
3217 | |
3218 | /// is AltiVec 'vector bool ...' |
3219 | AltiVecBool, |
3220 | |
3221 | /// is ARM Neon vector |
3222 | NeonVector, |
3223 | |
3224 | /// is ARM Neon polynomial vector |
3225 | NeonPolyVector |
3226 | }; |
3227 | |
3228 | protected: |
3229 | friend class ASTContext; // ASTContext creates these. |
3230 | |
3231 | /// The element type of the vector. |
3232 | QualType ElementType; |
3233 | |
3234 | VectorType(QualType vecType, unsigned nElements, QualType canonType, |
3235 | VectorKind vecKind); |
3236 | |
3237 | VectorType(TypeClass tc, QualType vecType, unsigned nElements, |
3238 | QualType canonType, VectorKind vecKind); |
3239 | |
3240 | public: |
3241 | QualType getElementType() const { return ElementType; } |
3242 | unsigned getNumElements() const { return VectorTypeBits.NumElements; } |
3243 | |
3244 | static bool isVectorSizeTooLarge(unsigned NumElements) { |
3245 | return NumElements > VectorTypeBitfields::MaxNumElements; |
3246 | } |
3247 | |
3248 | bool isSugared() const { return false; } |
3249 | QualType desugar() const { return QualType(this, 0); } |
3250 | |
3251 | VectorKind getVectorKind() const { |
3252 | return VectorKind(VectorTypeBits.VecKind); |
3253 | } |
3254 | |
3255 | void Profile(llvm::FoldingSetNodeID &ID) { |
3256 | Profile(ID, getElementType(), getNumElements(), |
3257 | getTypeClass(), getVectorKind()); |
3258 | } |
3259 | |
3260 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ElementType, |
3261 | unsigned NumElements, TypeClass TypeClass, |
3262 | VectorKind VecKind) { |
3263 | ID.AddPointer(ElementType.getAsOpaquePtr()); |
3264 | ID.AddInteger(NumElements); |
3265 | ID.AddInteger(TypeClass); |
3266 | ID.AddInteger(VecKind); |
3267 | } |
3268 | |
3269 | static bool classof(const Type *T) { |
3270 | return T->getTypeClass() == Vector || T->getTypeClass() == ExtVector; |
3271 | } |
3272 | }; |
3273 | |
3274 | /// Represents a vector type where either the type or size is dependent. |
3275 | //// |
3276 | /// For example: |
3277 | /// \code |
3278 | /// template<typename T, int Size> |
3279 | /// class vector { |
3280 | /// typedef T __attribute__((vector_size(Size))) type; |
3281 | /// } |
3282 | /// \endcode |
3283 | class DependentVectorType : public Type, public llvm::FoldingSetNode { |
3284 | friend class ASTContext; |
3285 | |
3286 | const ASTContext &Context; |
3287 | QualType ElementType; |
3288 | Expr *SizeExpr; |
3289 | SourceLocation Loc; |
3290 | |
3291 | DependentVectorType(const ASTContext &Context, QualType ElementType, |
3292 | QualType CanonType, Expr *SizeExpr, |
3293 | SourceLocation Loc, VectorType::VectorKind vecKind); |
3294 | |
3295 | public: |
3296 | Expr *getSizeExpr() const { return SizeExpr; } |
3297 | QualType getElementType() const { return ElementType; } |
3298 | SourceLocation getAttributeLoc() const { return Loc; } |
3299 | VectorType::VectorKind getVectorKind() const { |
3300 | return VectorType::VectorKind(VectorTypeBits.VecKind); |
3301 | } |
3302 | |
3303 | bool isSugared() const { return false; } |
3304 | QualType desugar() const { return QualType(this, 0); } |
3305 | |
3306 | static bool classof(const Type *T) { |
3307 | return T->getTypeClass() == DependentVector; |
3308 | } |
3309 | |
3310 | void Profile(llvm::FoldingSetNodeID &ID) { |
3311 | Profile(ID, Context, getElementType(), getSizeExpr(), getVectorKind()); |
3312 | } |
3313 | |
3314 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
3315 | QualType ElementType, const Expr *SizeExpr, |
3316 | VectorType::VectorKind VecKind); |
3317 | }; |
3318 | |
3319 | /// ExtVectorType - Extended vector type. This type is created using |
3320 | /// __attribute__((ext_vector_type(n)), where "n" is the number of elements. |
3321 | /// Unlike vector_size, ext_vector_type is only allowed on typedef's. This |
3322 | /// class enables syntactic extensions, like Vector Components for accessing |
3323 | /// points (as .xyzw), colors (as .rgba), and textures (modeled after OpenGL |
3324 | /// Shading Language). |
3325 | class ExtVectorType : public VectorType { |
3326 | friend class ASTContext; // ASTContext creates these. |
3327 | |
3328 | ExtVectorType(QualType vecType, unsigned nElements, QualType canonType) |
3329 | : VectorType(ExtVector, vecType, nElements, canonType, GenericVector) {} |
3330 | |
3331 | public: |
3332 | static int getPointAccessorIdx(char c) { |
3333 | switch (c) { |
3334 | default: return -1; |
3335 | case 'x': case 'r': return 0; |
3336 | case 'y': case 'g': return 1; |
3337 | case 'z': case 'b': return 2; |
3338 | case 'w': case 'a': return 3; |
3339 | } |
3340 | } |
3341 | |
3342 | static int getNumericAccessorIdx(char c) { |
3343 | switch (c) { |
3344 | default: return -1; |
3345 | case '0': return 0; |
3346 | case '1': return 1; |
3347 | case '2': return 2; |
3348 | case '3': return 3; |
3349 | case '4': return 4; |
3350 | case '5': return 5; |
3351 | case '6': return 6; |
3352 | case '7': return 7; |
3353 | case '8': return 8; |
3354 | case '9': return 9; |
3355 | case 'A': |
3356 | case 'a': return 10; |
3357 | case 'B': |
3358 | case 'b': return 11; |
3359 | case 'C': |
3360 | case 'c': return 12; |
3361 | case 'D': |
3362 | case 'd': return 13; |
3363 | case 'E': |
3364 | case 'e': return 14; |
3365 | case 'F': |
3366 | case 'f': return 15; |
3367 | } |
3368 | } |
3369 | |
3370 | static int getAccessorIdx(char c, bool isNumericAccessor) { |
3371 | if (isNumericAccessor) |
3372 | return getNumericAccessorIdx(c); |
3373 | else |
3374 | return getPointAccessorIdx(c); |
3375 | } |
3376 | |
3377 | bool isAccessorWithinNumElements(char c, bool isNumericAccessor) const { |
3378 | if (int idx = getAccessorIdx(c, isNumericAccessor)+1) |
3379 | return unsigned(idx-1) < getNumElements(); |
3380 | return false; |
3381 | } |
3382 | |
3383 | bool isSugared() const { return false; } |
3384 | QualType desugar() const { return QualType(this, 0); } |
3385 | |
3386 | static bool classof(const Type *T) { |
3387 | return T->getTypeClass() == ExtVector; |
3388 | } |
3389 | }; |
3390 | |
3391 | /// FunctionType - C99 6.7.5.3 - Function Declarators. This is the common base |
3392 | /// class of FunctionNoProtoType and FunctionProtoType. |
3393 | class FunctionType : public Type { |
3394 | // The type returned by the function. |
3395 | QualType ResultType; |
3396 | |
3397 | public: |
3398 | /// Interesting information about a specific parameter that can't simply |
3399 | /// be reflected in parameter's type. This is only used by FunctionProtoType |
3400 | /// but is in FunctionType to make this class available during the |
3401 | /// specification of the bases of FunctionProtoType. |
3402 | /// |
3403 | /// It makes sense to model language features this way when there's some |
3404 | /// sort of parameter-specific override (such as an attribute) that |
3405 | /// affects how the function is called. For example, the ARC ns_consumed |
3406 | /// attribute changes whether a parameter is passed at +0 (the default) |
3407 | /// or +1 (ns_consumed). This must be reflected in the function type, |
3408 | /// but isn't really a change to the parameter type. |
3409 | /// |
3410 | /// One serious disadvantage of modelling language features this way is |
3411 | /// that they generally do not work with language features that attempt |
3412 | /// to destructure types. For example, template argument deduction will |
3413 | /// not be able to match a parameter declared as |
3414 | /// T (*)(U) |
3415 | /// against an argument of type |
3416 | /// void (*)(__attribute__((ns_consumed)) id) |
3417 | /// because the substitution of T=void, U=id into the former will |
3418 | /// not produce the latter. |
3419 | class ExtParameterInfo { |
3420 | enum { |
3421 | ABIMask = 0x0F, |
3422 | IsConsumed = 0x10, |
3423 | HasPassObjSize = 0x20, |
3424 | IsNoEscape = 0x40, |
3425 | }; |
3426 | unsigned char Data = 0; |
3427 | |
3428 | public: |
3429 | ExtParameterInfo() = default; |
3430 | |
3431 | /// Return the ABI treatment of this parameter. |
3432 | ParameterABI getABI() const { return ParameterABI(Data & ABIMask); } |
3433 | ExtParameterInfo withABI(ParameterABI kind) const { |
3434 | ExtParameterInfo copy = *this; |
3435 | copy.Data = (copy.Data & ~ABIMask) | unsigned(kind); |
3436 | return copy; |
3437 | } |
3438 | |
3439 | /// Is this parameter considered "consumed" by Objective-C ARC? |
3440 | /// Consumed parameters must have retainable object type. |
3441 | bool isConsumed() const { return (Data & IsConsumed); } |
3442 | ExtParameterInfo withIsConsumed(bool consumed) const { |
3443 | ExtParameterInfo copy = *this; |
3444 | if (consumed) |
3445 | copy.Data |= IsConsumed; |
3446 | else |
3447 | copy.Data &= ~IsConsumed; |
3448 | return copy; |
3449 | } |
3450 | |
3451 | bool hasPassObjectSize() const { return Data & HasPassObjSize; } |
3452 | ExtParameterInfo withHasPassObjectSize() const { |
3453 | ExtParameterInfo Copy = *this; |
3454 | Copy.Data |= HasPassObjSize; |
3455 | return Copy; |
3456 | } |
3457 | |
3458 | bool isNoEscape() const { return Data & IsNoEscape; } |
3459 | ExtParameterInfo withIsNoEscape(bool NoEscape) const { |
3460 | ExtParameterInfo Copy = *this; |
3461 | if (NoEscape) |
3462 | Copy.Data |= IsNoEscape; |
3463 | else |
3464 | Copy.Data &= ~IsNoEscape; |
3465 | return Copy; |
3466 | } |
3467 | |
3468 | unsigned char getOpaqueValue() const { return Data; } |
3469 | static ExtParameterInfo getFromOpaqueValue(unsigned char data) { |
3470 | ExtParameterInfo result; |
3471 | result.Data = data; |
3472 | return result; |
3473 | } |
3474 | |
3475 | friend bool operator==(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3476 | return lhs.Data == rhs.Data; |
3477 | } |
3478 | |
3479 | friend bool operator!=(ExtParameterInfo lhs, ExtParameterInfo rhs) { |
3480 | return lhs.Data != rhs.Data; |
3481 | } |
3482 | }; |
3483 | |
3484 | /// A class which abstracts out some details necessary for |
3485 | /// making a call. |
3486 | /// |
3487 | /// It is not actually used directly for storing this information in |
3488 | /// a FunctionType, although FunctionType does currently use the |
3489 | /// same bit-pattern. |
3490 | /// |
3491 | // If you add a field (say Foo), other than the obvious places (both, |
3492 | // constructors, compile failures), what you need to update is |
3493 | // * Operator== |
3494 | // * getFoo |
3495 | // * withFoo |
3496 | // * functionType. Add Foo, getFoo. |
3497 | // * ASTContext::getFooType |
3498 | // * ASTContext::mergeFunctionTypes |
3499 | // * FunctionNoProtoType::Profile |
3500 | // * FunctionProtoType::Profile |
3501 | // * TypePrinter::PrintFunctionProto |
3502 | // * AST read and write |
3503 | // * Codegen |
3504 | class ExtInfo { |
3505 | friend class FunctionType; |
3506 | |
3507 | // Feel free to rearrange or add bits, but if you go over 12, |
3508 | // you'll need to adjust both the Bits field below and |
3509 | // Type::FunctionTypeBitfields. |
3510 | |
3511 | // | CC |noreturn|produces|nocallersavedregs|regparm|nocfcheck| |
3512 | // |0 .. 4| 5 | 6 | 7 |8 .. 10| 11 | |
3513 | // |
3514 | // regparm is either 0 (no regparm attribute) or the regparm value+1. |
3515 | enum { CallConvMask = 0x1F }; |
3516 | enum { NoReturnMask = 0x20 }; |
3517 | enum { ProducesResultMask = 0x40 }; |
3518 | enum { NoCallerSavedRegsMask = 0x80 }; |
3519 | enum { NoCfCheckMask = 0x800 }; |
3520 | enum { |
3521 | RegParmMask = ~(CallConvMask | NoReturnMask | ProducesResultMask | |
3522 | NoCallerSavedRegsMask | NoCfCheckMask), |
3523 | RegParmOffset = 8 |
3524 | }; // Assumed to be the last field |
3525 | uint16_t Bits = CC_C; |
3526 | |
3527 | ExtInfo(unsigned Bits) : Bits(static_cast<uint16_t>(Bits)) {} |
3528 | |
3529 | public: |
3530 | // Constructor with no defaults. Use this when you know that you |
3531 | // have all the elements (when reading an AST file for example). |
3532 | ExtInfo(bool noReturn, bool hasRegParm, unsigned regParm, CallingConv cc, |
3533 | bool producesResult, bool noCallerSavedRegs, bool NoCfCheck) { |
3534 | assert((!hasRegParm || regParm < 7) && "Invalid regparm value")(((!hasRegParm || regParm < 7) && "Invalid regparm value" ) ? static_cast<void> (0) : __assert_fail ("(!hasRegParm || regParm < 7) && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3534, __PRETTY_FUNCTION__)); |
3535 | Bits = ((unsigned)cc) | (noReturn ? NoReturnMask : 0) | |
3536 | (producesResult ? ProducesResultMask : 0) | |
3537 | (noCallerSavedRegs ? NoCallerSavedRegsMask : 0) | |
3538 | (hasRegParm ? ((regParm + 1) << RegParmOffset) : 0) | |
3539 | (NoCfCheck ? NoCfCheckMask : 0); |
3540 | } |
3541 | |
3542 | // Constructor with all defaults. Use when for example creating a |
3543 | // function known to use defaults. |
3544 | ExtInfo() = default; |
3545 | |
3546 | // Constructor with just the calling convention, which is an important part |
3547 | // of the canonical type. |
3548 | ExtInfo(CallingConv CC) : Bits(CC) {} |
3549 | |
3550 | bool getNoReturn() const { return Bits & NoReturnMask; } |
3551 | bool getProducesResult() const { return Bits & ProducesResultMask; } |
3552 | bool getNoCallerSavedRegs() const { return Bits & NoCallerSavedRegsMask; } |
3553 | bool getNoCfCheck() const { return Bits & NoCfCheckMask; } |
3554 | bool getHasRegParm() const { return (Bits >> RegParmOffset) != 0; } |
3555 | |
3556 | unsigned getRegParm() const { |
3557 | unsigned RegParm = (Bits & RegParmMask) >> RegParmOffset; |
3558 | if (RegParm > 0) |
3559 | --RegParm; |
3560 | return RegParm; |
3561 | } |
3562 | |
3563 | CallingConv getCC() const { return CallingConv(Bits & CallConvMask); } |
3564 | |
3565 | bool operator==(ExtInfo Other) const { |
3566 | return Bits == Other.Bits; |
3567 | } |
3568 | bool operator!=(ExtInfo Other) const { |
3569 | return Bits != Other.Bits; |
3570 | } |
3571 | |
3572 | // Note that we don't have setters. That is by design, use |
3573 | // the following with methods instead of mutating these objects. |
3574 | |
3575 | ExtInfo withNoReturn(bool noReturn) const { |
3576 | if (noReturn) |
3577 | return ExtInfo(Bits | NoReturnMask); |
3578 | else |
3579 | return ExtInfo(Bits & ~NoReturnMask); |
3580 | } |
3581 | |
3582 | ExtInfo withProducesResult(bool producesResult) const { |
3583 | if (producesResult) |
3584 | return ExtInfo(Bits | ProducesResultMask); |
3585 | else |
3586 | return ExtInfo(Bits & ~ProducesResultMask); |
3587 | } |
3588 | |
3589 | ExtInfo withNoCallerSavedRegs(bool noCallerSavedRegs) const { |
3590 | if (noCallerSavedRegs) |
3591 | return ExtInfo(Bits | NoCallerSavedRegsMask); |
3592 | else |
3593 | return ExtInfo(Bits & ~NoCallerSavedRegsMask); |
3594 | } |
3595 | |
3596 | ExtInfo withNoCfCheck(bool noCfCheck) const { |
3597 | if (noCfCheck) |
3598 | return ExtInfo(Bits | NoCfCheckMask); |
3599 | else |
3600 | return ExtInfo(Bits & ~NoCfCheckMask); |
3601 | } |
3602 | |
3603 | ExtInfo withRegParm(unsigned RegParm) const { |
3604 | assert(RegParm < 7 && "Invalid regparm value")((RegParm < 7 && "Invalid regparm value") ? static_cast <void> (0) : __assert_fail ("RegParm < 7 && \"Invalid regparm value\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3604, __PRETTY_FUNCTION__)); |
3605 | return ExtInfo((Bits & ~RegParmMask) | |
3606 | ((RegParm + 1) << RegParmOffset)); |
3607 | } |
3608 | |
3609 | ExtInfo withCallingConv(CallingConv cc) const { |
3610 | return ExtInfo((Bits & ~CallConvMask) | (unsigned) cc); |
3611 | } |
3612 | |
3613 | void Profile(llvm::FoldingSetNodeID &ID) const { |
3614 | ID.AddInteger(Bits); |
3615 | } |
3616 | }; |
3617 | |
3618 | /// A simple holder for a QualType representing a type in an |
3619 | /// exception specification. Unfortunately needed by FunctionProtoType |
3620 | /// because TrailingObjects cannot handle repeated types. |
3621 | struct ExceptionType { QualType Type; }; |
3622 | |
3623 | /// A simple holder for various uncommon bits which do not fit in |
3624 | /// FunctionTypeBitfields. Aligned to alignof(void *) to maintain the |
3625 | /// alignment of subsequent objects in TrailingObjects. You must update |
3626 | /// hasExtraBitfields in FunctionProtoType after adding extra data here. |
3627 | struct alignas(void *) FunctionTypeExtraBitfields { |
3628 | /// The number of types in the exception specification. |
3629 | /// A whole unsigned is not needed here and according to |
3630 | /// [implimits] 8 bits would be enough here. |
3631 | unsigned NumExceptionType; |
3632 | }; |
3633 | |
3634 | protected: |
3635 | FunctionType(TypeClass tc, QualType res, |
3636 | QualType Canonical, bool Dependent, |
3637 | bool InstantiationDependent, |
3638 | bool VariablyModified, bool ContainsUnexpandedParameterPack, |
3639 | ExtInfo Info) |
3640 | : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, |
3641 | ContainsUnexpandedParameterPack), |
3642 | ResultType(res) { |
3643 | FunctionTypeBits.ExtInfo = Info.Bits; |
3644 | } |
3645 | |
3646 | Qualifiers getFastTypeQuals() const { |
3647 | return Qualifiers::fromFastMask(FunctionTypeBits.FastTypeQuals); |
3648 | } |
3649 | |
3650 | public: |
3651 | QualType getReturnType() const { return ResultType; } |
3652 | |
3653 | bool getHasRegParm() const { return getExtInfo().getHasRegParm(); } |
3654 | unsigned getRegParmType() const { return getExtInfo().getRegParm(); } |
3655 | |
3656 | /// Determine whether this function type includes the GNU noreturn |
3657 | /// attribute. The C++11 [[noreturn]] attribute does not affect the function |
3658 | /// type. |
3659 | bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); } |
3660 | |
3661 | CallingConv getCallConv() const { return getExtInfo().getCC(); } |
3662 | ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); } |
3663 | |
3664 | static_assert((~Qualifiers::FastMask & Qualifiers::CVRMask) == 0, |
3665 | "Const, volatile and restrict are assumed to be a subset of " |
3666 | "the fast qualifiers."); |
3667 | |
3668 | bool isConst() const { return getFastTypeQuals().hasConst(); } |
3669 | bool isVolatile() const { return getFastTypeQuals().hasVolatile(); } |
3670 | bool isRestrict() const { return getFastTypeQuals().hasRestrict(); } |
3671 | |
3672 | /// Determine the type of an expression that calls a function of |
3673 | /// this type. |
3674 | QualType getCallResultType(const ASTContext &Context) const { |
3675 | return getReturnType().getNonLValueExprType(Context); |
3676 | } |
3677 | |
3678 | static StringRef getNameForCallConv(CallingConv CC); |
3679 | |
3680 | static bool classof(const Type *T) { |
3681 | return T->getTypeClass() == FunctionNoProto || |
3682 | T->getTypeClass() == FunctionProto; |
3683 | } |
3684 | }; |
3685 | |
3686 | /// Represents a K&R-style 'int foo()' function, which has |
3687 | /// no information available about its arguments. |
3688 | class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode { |
3689 | friend class ASTContext; // ASTContext creates these. |
3690 | |
3691 | FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info) |
3692 | : FunctionType(FunctionNoProto, Result, Canonical, |
3693 | /*Dependent=*/false, /*InstantiationDependent=*/false, |
3694 | Result->isVariablyModifiedType(), |
3695 | /*ContainsUnexpandedParameterPack=*/false, Info) {} |
3696 | |
3697 | public: |
3698 | // No additional state past what FunctionType provides. |
3699 | |
3700 | bool isSugared() const { return false; } |
3701 | QualType desugar() const { return QualType(this, 0); } |
3702 | |
3703 | void Profile(llvm::FoldingSetNodeID &ID) { |
3704 | Profile(ID, getReturnType(), getExtInfo()); |
3705 | } |
3706 | |
3707 | static void Profile(llvm::FoldingSetNodeID &ID, QualType ResultType, |
3708 | ExtInfo Info) { |
3709 | Info.Profile(ID); |
3710 | ID.AddPointer(ResultType.getAsOpaquePtr()); |
3711 | } |
3712 | |
3713 | static bool classof(const Type *T) { |
3714 | return T->getTypeClass() == FunctionNoProto; |
3715 | } |
3716 | }; |
3717 | |
3718 | /// Represents a prototype with parameter type info, e.g. |
3719 | /// 'int foo(int)' or 'int foo(void)'. 'void' is represented as having no |
3720 | /// parameters, not as having a single void parameter. Such a type can have |
3721 | /// an exception specification, but this specification is not part of the |
3722 | /// canonical type. FunctionProtoType has several trailing objects, some of |
3723 | /// which optional. For more information about the trailing objects see |
3724 | /// the first comment inside FunctionProtoType. |
3725 | class FunctionProtoType final |
3726 | : public FunctionType, |
3727 | public llvm::FoldingSetNode, |
3728 | private llvm::TrailingObjects< |
3729 | FunctionProtoType, QualType, FunctionType::FunctionTypeExtraBitfields, |
3730 | FunctionType::ExceptionType, Expr *, FunctionDecl *, |
3731 | FunctionType::ExtParameterInfo, Qualifiers> { |
3732 | friend class ASTContext; // ASTContext creates these. |
3733 | friend TrailingObjects; |
3734 | |
3735 | // FunctionProtoType is followed by several trailing objects, some of |
3736 | // which optional. They are in order: |
3737 | // |
3738 | // * An array of getNumParams() QualType holding the parameter types. |
3739 | // Always present. Note that for the vast majority of FunctionProtoType, |
3740 | // these will be the only trailing objects. |
3741 | // |
3742 | // * Optionally if some extra data is stored in FunctionTypeExtraBitfields |
3743 | // (see FunctionTypeExtraBitfields and FunctionTypeBitfields): |
3744 | // a single FunctionTypeExtraBitfields. Present if and only if |
3745 | // hasExtraBitfields() is true. |
3746 | // |
3747 | // * Optionally exactly one of: |
3748 | // * an array of getNumExceptions() ExceptionType, |
3749 | // * a single Expr *, |
3750 | // * a pair of FunctionDecl *, |
3751 | // * a single FunctionDecl * |
3752 | // used to store information about the various types of exception |
3753 | // specification. See getExceptionSpecSize for the details. |
3754 | // |
3755 | // * Optionally an array of getNumParams() ExtParameterInfo holding |
3756 | // an ExtParameterInfo for each of the parameters. Present if and |
3757 | // only if hasExtParameterInfos() is true. |
3758 | // |
3759 | // * Optionally a Qualifiers object to represent extra qualifiers that can't |
3760 | // be represented by FunctionTypeBitfields.FastTypeQuals. Present if and only |
3761 | // if hasExtQualifiers() is true. |
3762 | // |
3763 | // The optional FunctionTypeExtraBitfields has to be before the data |
3764 | // related to the exception specification since it contains the number |
3765 | // of exception types. |
3766 | // |
3767 | // We put the ExtParameterInfos last. If all were equal, it would make |
3768 | // more sense to put these before the exception specification, because |
3769 | // it's much easier to skip past them compared to the elaborate switch |
3770 | // required to skip the exception specification. However, all is not |
3771 | // equal; ExtParameterInfos are used to model very uncommon features, |
3772 | // and it's better not to burden the more common paths. |
3773 | |
3774 | public: |
3775 | /// Holds information about the various types of exception specification. |
3776 | /// ExceptionSpecInfo is not stored as such in FunctionProtoType but is |
3777 | /// used to group together the various bits of information about the |
3778 | /// exception specification. |
3779 | struct ExceptionSpecInfo { |
3780 | /// The kind of exception specification this is. |
3781 | ExceptionSpecificationType Type = EST_None; |
3782 | |
3783 | /// Explicitly-specified list of exception types. |
3784 | ArrayRef<QualType> Exceptions; |
3785 | |
3786 | /// Noexcept expression, if this is a computed noexcept specification. |
3787 | Expr *NoexceptExpr = nullptr; |
3788 | |
3789 | /// The function whose exception specification this is, for |
3790 | /// EST_Unevaluated and EST_Uninstantiated. |
3791 | FunctionDecl *SourceDecl = nullptr; |
3792 | |
3793 | /// The function template whose exception specification this is instantiated |
3794 | /// from, for EST_Uninstantiated. |
3795 | FunctionDecl *SourceTemplate = nullptr; |
3796 | |
3797 | ExceptionSpecInfo() = default; |
3798 | |
3799 | ExceptionSpecInfo(ExceptionSpecificationType EST) : Type(EST) {} |
3800 | }; |
3801 | |
3802 | /// Extra information about a function prototype. ExtProtoInfo is not |
3803 | /// stored as such in FunctionProtoType but is used to group together |
3804 | /// the various bits of extra information about a function prototype. |
3805 | struct ExtProtoInfo { |
3806 | FunctionType::ExtInfo ExtInfo; |
3807 | bool Variadic : 1; |
3808 | bool HasTrailingReturn : 1; |
3809 | Qualifiers TypeQuals; |
3810 | RefQualifierKind RefQualifier = RQ_None; |
3811 | ExceptionSpecInfo ExceptionSpec; |
3812 | const ExtParameterInfo *ExtParameterInfos = nullptr; |
3813 | |
3814 | ExtProtoInfo() : Variadic(false), HasTrailingReturn(false) {} |
3815 | |
3816 | ExtProtoInfo(CallingConv CC) |
3817 | : ExtInfo(CC), Variadic(false), HasTrailingReturn(false) {} |
3818 | |
3819 | ExtProtoInfo withExceptionSpec(const ExceptionSpecInfo &ESI) { |
3820 | ExtProtoInfo Result(*this); |
3821 | Result.ExceptionSpec = ESI; |
3822 | return Result; |
3823 | } |
3824 | }; |
3825 | |
3826 | private: |
3827 | unsigned numTrailingObjects(OverloadToken<QualType>) const { |
3828 | return getNumParams(); |
3829 | } |
3830 | |
3831 | unsigned numTrailingObjects(OverloadToken<FunctionTypeExtraBitfields>) const { |
3832 | return hasExtraBitfields(); |
3833 | } |
3834 | |
3835 | unsigned numTrailingObjects(OverloadToken<ExceptionType>) const { |
3836 | return getExceptionSpecSize().NumExceptionType; |
3837 | } |
3838 | |
3839 | unsigned numTrailingObjects(OverloadToken<Expr *>) const { |
3840 | return getExceptionSpecSize().NumExprPtr; |
3841 | } |
3842 | |
3843 | unsigned numTrailingObjects(OverloadToken<FunctionDecl *>) const { |
3844 | return getExceptionSpecSize().NumFunctionDeclPtr; |
3845 | } |
3846 | |
3847 | unsigned numTrailingObjects(OverloadToken<ExtParameterInfo>) const { |
3848 | return hasExtParameterInfos() ? getNumParams() : 0; |
3849 | } |
3850 | |
3851 | /// Determine whether there are any argument types that |
3852 | /// contain an unexpanded parameter pack. |
3853 | static bool containsAnyUnexpandedParameterPack(const QualType *ArgArray, |
3854 | unsigned numArgs) { |
3855 | for (unsigned Idx = 0; Idx < numArgs; ++Idx) |
3856 | if (ArgArray[Idx]->containsUnexpandedParameterPack()) |
3857 | return true; |
3858 | |
3859 | return false; |
3860 | } |
3861 | |
3862 | FunctionProtoType(QualType result, ArrayRef<QualType> params, |
3863 | QualType canonical, const ExtProtoInfo &epi); |
3864 | |
3865 | /// This struct is returned by getExceptionSpecSize and is used to |
3866 | /// translate an ExceptionSpecificationType to the number and kind |
3867 | /// of trailing objects related to the exception specification. |
3868 | struct ExceptionSpecSizeHolder { |
3869 | unsigned NumExceptionType; |
3870 | unsigned NumExprPtr; |
3871 | unsigned NumFunctionDeclPtr; |
3872 | }; |
3873 | |
3874 | /// Return the number and kind of trailing objects |
3875 | /// related to the exception specification. |
3876 | static ExceptionSpecSizeHolder |
3877 | getExceptionSpecSize(ExceptionSpecificationType EST, unsigned NumExceptions) { |
3878 | switch (EST) { |
3879 | case EST_None: |
3880 | case EST_DynamicNone: |
3881 | case EST_MSAny: |
3882 | case EST_BasicNoexcept: |
3883 | case EST_Unparsed: |
3884 | case EST_NoThrow: |
3885 | return {0, 0, 0}; |
3886 | |
3887 | case EST_Dynamic: |
3888 | return {NumExceptions, 0, 0}; |
3889 | |
3890 | case EST_DependentNoexcept: |
3891 | case EST_NoexceptFalse: |
3892 | case EST_NoexceptTrue: |
3893 | return {0, 1, 0}; |
3894 | |
3895 | case EST_Uninstantiated: |
3896 | return {0, 0, 2}; |
3897 | |
3898 | case EST_Unevaluated: |
3899 | return {0, 0, 1}; |
3900 | } |
3901 | llvm_unreachable("bad exception specification kind")::llvm::llvm_unreachable_internal("bad exception specification kind" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3901); |
3902 | } |
3903 | |
3904 | /// Return the number and kind of trailing objects |
3905 | /// related to the exception specification. |
3906 | ExceptionSpecSizeHolder getExceptionSpecSize() const { |
3907 | return getExceptionSpecSize(getExceptionSpecType(), getNumExceptions()); |
3908 | } |
3909 | |
3910 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
3911 | static bool hasExtraBitfields(ExceptionSpecificationType EST) { |
3912 | // If the exception spec type is EST_Dynamic then we have > 0 exception |
3913 | // types and the exact number is stored in FunctionTypeExtraBitfields. |
3914 | return EST == EST_Dynamic; |
3915 | } |
3916 | |
3917 | /// Whether the trailing FunctionTypeExtraBitfields is present. |
3918 | bool hasExtraBitfields() const { |
3919 | return hasExtraBitfields(getExceptionSpecType()); |
3920 | } |
3921 | |
3922 | bool hasExtQualifiers() const { |
3923 | return FunctionTypeBits.HasExtQuals; |
3924 | } |
3925 | |
3926 | public: |
3927 | unsigned getNumParams() const { return FunctionTypeBits.NumParams; } |
3928 | |
3929 | QualType getParamType(unsigned i) const { |
3930 | assert(i < getNumParams() && "invalid parameter index")((i < getNumParams() && "invalid parameter index") ? static_cast<void> (0) : __assert_fail ("i < getNumParams() && \"invalid parameter index\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3930, __PRETTY_FUNCTION__)); |
3931 | return param_type_begin()[i]; |
3932 | } |
3933 | |
3934 | ArrayRef<QualType> getParamTypes() const { |
3935 | return llvm::makeArrayRef(param_type_begin(), param_type_end()); |
3936 | } |
3937 | |
3938 | ExtProtoInfo getExtProtoInfo() const { |
3939 | ExtProtoInfo EPI; |
3940 | EPI.ExtInfo = getExtInfo(); |
3941 | EPI.Variadic = isVariadic(); |
3942 | EPI.HasTrailingReturn = hasTrailingReturn(); |
3943 | EPI.ExceptionSpec.Type = getExceptionSpecType(); |
3944 | EPI.TypeQuals = getMethodQuals(); |
3945 | EPI.RefQualifier = getRefQualifier(); |
3946 | if (EPI.ExceptionSpec.Type == EST_Dynamic) { |
3947 | EPI.ExceptionSpec.Exceptions = exceptions(); |
3948 | } else if (isComputedNoexcept(EPI.ExceptionSpec.Type)) { |
3949 | EPI.ExceptionSpec.NoexceptExpr = getNoexceptExpr(); |
3950 | } else if (EPI.ExceptionSpec.Type == EST_Uninstantiated) { |
3951 | EPI.ExceptionSpec.SourceDecl = getExceptionSpecDecl(); |
3952 | EPI.ExceptionSpec.SourceTemplate = getExceptionSpecTemplate(); |
3953 | } else if (EPI.ExceptionSpec.Type == EST_Unevaluated) { |
3954 | EPI.ExceptionSpec.SourceDecl = getExceptionSpecDecl(); |
3955 | } |
3956 | EPI.ExtParameterInfos = getExtParameterInfosOrNull(); |
3957 | return EPI; |
3958 | } |
3959 | |
3960 | /// Get the kind of exception specification on this function. |
3961 | ExceptionSpecificationType getExceptionSpecType() const { |
3962 | return static_cast<ExceptionSpecificationType>( |
3963 | FunctionTypeBits.ExceptionSpecType); |
3964 | } |
3965 | |
3966 | /// Return whether this function has any kind of exception spec. |
3967 | bool hasExceptionSpec() const { return getExceptionSpecType() != EST_None; } |
3968 | |
3969 | /// Return whether this function has a dynamic (throw) exception spec. |
3970 | bool hasDynamicExceptionSpec() const { |
3971 | return isDynamicExceptionSpec(getExceptionSpecType()); |
3972 | } |
3973 | |
3974 | /// Return whether this function has a noexcept exception spec. |
3975 | bool hasNoexceptExceptionSpec() const { |
3976 | return isNoexceptExceptionSpec(getExceptionSpecType()); |
3977 | } |
3978 | |
3979 | /// Return whether this function has a dependent exception spec. |
3980 | bool hasDependentExceptionSpec() const; |
3981 | |
3982 | /// Return whether this function has an instantiation-dependent exception |
3983 | /// spec. |
3984 | bool hasInstantiationDependentExceptionSpec() const; |
3985 | |
3986 | /// Return the number of types in the exception specification. |
3987 | unsigned getNumExceptions() const { |
3988 | return getExceptionSpecType() == EST_Dynamic |
3989 | ? getTrailingObjects<FunctionTypeExtraBitfields>() |
3990 | ->NumExceptionType |
3991 | : 0; |
3992 | } |
3993 | |
3994 | /// Return the ith exception type, where 0 <= i < getNumExceptions(). |
3995 | QualType getExceptionType(unsigned i) const { |
3996 | assert(i < getNumExceptions() && "Invalid exception number!")((i < getNumExceptions() && "Invalid exception number!" ) ? static_cast<void> (0) : __assert_fail ("i < getNumExceptions() && \"Invalid exception number!\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 3996, __PRETTY_FUNCTION__)); |
3997 | return exception_begin()[i]; |
3998 | } |
3999 | |
4000 | /// Return the expression inside noexcept(expression), or a null pointer |
4001 | /// if there is none (because the exception spec is not of this form). |
4002 | Expr *getNoexceptExpr() const { |
4003 | if (!isComputedNoexcept(getExceptionSpecType())) |
4004 | return nullptr; |
4005 | return *getTrailingObjects<Expr *>(); |
4006 | } |
4007 | |
4008 | /// If this function type has an exception specification which hasn't |
4009 | /// been determined yet (either because it has not been evaluated or because |
4010 | /// it has not been instantiated), this is the function whose exception |
4011 | /// specification is represented by this type. |
4012 | FunctionDecl *getExceptionSpecDecl() const { |
4013 | if (getExceptionSpecType() != EST_Uninstantiated && |
4014 | getExceptionSpecType() != EST_Unevaluated) |
4015 | return nullptr; |
4016 | return getTrailingObjects<FunctionDecl *>()[0]; |
4017 | } |
4018 | |
4019 | /// If this function type has an uninstantiated exception |
4020 | /// specification, this is the function whose exception specification |
4021 | /// should be instantiated to find the exception specification for |
4022 | /// this type. |
4023 | FunctionDecl *getExceptionSpecTemplate() const { |
4024 | if (getExceptionSpecType() != EST_Uninstantiated) |
4025 | return nullptr; |
4026 | return getTrailingObjects<FunctionDecl *>()[1]; |
4027 | } |
4028 | |
4029 | /// Determine whether this function type has a non-throwing exception |
4030 | /// specification. |
4031 | CanThrowResult canThrow() const; |
4032 | |
4033 | /// Determine whether this function type has a non-throwing exception |
4034 | /// specification. If this depends on template arguments, returns |
4035 | /// \c ResultIfDependent. |
4036 | bool isNothrow(bool ResultIfDependent = false) const { |
4037 | return ResultIfDependent ? canThrow() != CT_Can : canThrow() == CT_Cannot; |
4038 | } |
4039 | |
4040 | /// Whether this function prototype is variadic. |
4041 | bool isVariadic() const { return FunctionTypeBits.Variadic; } |
4042 | |
4043 | /// Determines whether this function prototype contains a |
4044 | /// parameter pack at the end. |
4045 | /// |
4046 | /// A function template whose last parameter is a parameter pack can be |
4047 | /// called with an arbitrary number of arguments, much like a variadic |
4048 | /// function. |
4049 | bool isTemplateVariadic() const; |
4050 | |
4051 | /// Whether this function prototype has a trailing return type. |
4052 | bool hasTrailingReturn() const { return FunctionTypeBits.HasTrailingReturn; } |
4053 | |
4054 | Qualifiers getMethodQuals() const { |
4055 | if (hasExtQualifiers()) |
4056 | return *getTrailingObjects<Qualifiers>(); |
4057 | else |
4058 | return getFastTypeQuals(); |
4059 | } |
4060 | |
4061 | /// Retrieve the ref-qualifier associated with this function type. |
4062 | RefQualifierKind getRefQualifier() const { |
4063 | return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier); |
4064 | } |
4065 | |
4066 | using param_type_iterator = const QualType *; |
4067 | using param_type_range = llvm::iterator_range<param_type_iterator>; |
4068 | |
4069 | param_type_range param_types() const { |
4070 | return param_type_range(param_type_begin(), param_type_end()); |
4071 | } |
4072 | |
4073 | param_type_iterator param_type_begin() const { |
4074 | return getTrailingObjects<QualType>(); |
4075 | } |
4076 | |
4077 | param_type_iterator param_type_end() const { |
4078 | return param_type_begin() + getNumParams(); |
4079 | } |
4080 | |
4081 | using exception_iterator = const QualType *; |
4082 | |
4083 | ArrayRef<QualType> exceptions() const { |
4084 | return llvm::makeArrayRef(exception_begin(), exception_end()); |
4085 | } |
4086 | |
4087 | exception_iterator exception_begin() const { |
4088 | return reinterpret_cast<exception_iterator>( |
4089 | getTrailingObjects<ExceptionType>()); |
4090 | } |
4091 | |
4092 | exception_iterator exception_end() const { |
4093 | return exception_begin() + getNumExceptions(); |
4094 | } |
4095 | |
4096 | /// Is there any interesting extra information for any of the parameters |
4097 | /// of this function type? |
4098 | bool hasExtParameterInfos() const { |
4099 | return FunctionTypeBits.HasExtParameterInfos; |
4100 | } |
4101 | |
4102 | ArrayRef<ExtParameterInfo> getExtParameterInfos() const { |
4103 | assert(hasExtParameterInfos())((hasExtParameterInfos()) ? static_cast<void> (0) : __assert_fail ("hasExtParameterInfos()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4103, __PRETTY_FUNCTION__)); |
4104 | return ArrayRef<ExtParameterInfo>(getTrailingObjects<ExtParameterInfo>(), |
4105 | getNumParams()); |
4106 | } |
4107 | |
4108 | /// Return a pointer to the beginning of the array of extra parameter |
4109 | /// information, if present, or else null if none of the parameters |
4110 | /// carry it. This is equivalent to getExtProtoInfo().ExtParameterInfos. |
4111 | const ExtParameterInfo *getExtParameterInfosOrNull() const { |
4112 | if (!hasExtParameterInfos()) |
4113 | return nullptr; |
4114 | return getTrailingObjects<ExtParameterInfo>(); |
4115 | } |
4116 | |
4117 | ExtParameterInfo getExtParameterInfo(unsigned I) const { |
4118 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4118, __PRETTY_FUNCTION__)); |
4119 | if (hasExtParameterInfos()) |
4120 | return getTrailingObjects<ExtParameterInfo>()[I]; |
4121 | return ExtParameterInfo(); |
4122 | } |
4123 | |
4124 | ParameterABI getParameterABI(unsigned I) const { |
4125 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4125, __PRETTY_FUNCTION__)); |
4126 | if (hasExtParameterInfos()) |
4127 | return getTrailingObjects<ExtParameterInfo>()[I].getABI(); |
4128 | return ParameterABI::Ordinary; |
4129 | } |
4130 | |
4131 | bool isParamConsumed(unsigned I) const { |
4132 | assert(I < getNumParams() && "parameter index out of range")((I < getNumParams() && "parameter index out of range" ) ? static_cast<void> (0) : __assert_fail ("I < getNumParams() && \"parameter index out of range\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4132, __PRETTY_FUNCTION__)); |
4133 | if (hasExtParameterInfos()) |
4134 | return getTrailingObjects<ExtParameterInfo>()[I].isConsumed(); |
4135 | return false; |
4136 | } |
4137 | |
4138 | bool isSugared() const { return false; } |
4139 | QualType desugar() const { return QualType(this, 0); } |
4140 | |
4141 | void printExceptionSpecification(raw_ostream &OS, |
4142 | const PrintingPolicy &Policy) const; |
4143 | |
4144 | static bool classof(const Type *T) { |
4145 | return T->getTypeClass() == FunctionProto; |
4146 | } |
4147 | |
4148 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx); |
4149 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Result, |
4150 | param_type_iterator ArgTys, unsigned NumArgs, |
4151 | const ExtProtoInfo &EPI, const ASTContext &Context, |
4152 | bool Canonical); |
4153 | }; |
4154 | |
4155 | /// Represents the dependent type named by a dependently-scoped |
4156 | /// typename using declaration, e.g. |
4157 | /// using typename Base<T>::foo; |
4158 | /// |
4159 | /// Template instantiation turns these into the underlying type. |
4160 | class UnresolvedUsingType : public Type { |
4161 | friend class ASTContext; // ASTContext creates these. |
4162 | |
4163 | UnresolvedUsingTypenameDecl *Decl; |
4164 | |
4165 | UnresolvedUsingType(const UnresolvedUsingTypenameDecl *D) |
4166 | : Type(UnresolvedUsing, QualType(), true, true, false, |
4167 | /*ContainsUnexpandedParameterPack=*/false), |
4168 | Decl(const_cast<UnresolvedUsingTypenameDecl*>(D)) {} |
4169 | |
4170 | public: |
4171 | UnresolvedUsingTypenameDecl *getDecl() const { return Decl; } |
4172 | |
4173 | bool isSugared() const { return false; } |
4174 | QualType desugar() const { return QualType(this, 0); } |
4175 | |
4176 | static bool classof(const Type *T) { |
4177 | return T->getTypeClass() == UnresolvedUsing; |
4178 | } |
4179 | |
4180 | void Profile(llvm::FoldingSetNodeID &ID) { |
4181 | return Profile(ID, Decl); |
4182 | } |
4183 | |
4184 | static void Profile(llvm::FoldingSetNodeID &ID, |
4185 | UnresolvedUsingTypenameDecl *D) { |
4186 | ID.AddPointer(D); |
4187 | } |
4188 | }; |
4189 | |
4190 | class TypedefType : public Type { |
4191 | TypedefNameDecl *Decl; |
4192 | |
4193 | protected: |
4194 | friend class ASTContext; // ASTContext creates these. |
4195 | |
4196 | TypedefType(TypeClass tc, const TypedefNameDecl *D, QualType can) |
4197 | : Type(tc, can, can->isDependentType(), |
4198 | can->isInstantiationDependentType(), |
4199 | can->isVariablyModifiedType(), |
4200 | /*ContainsUnexpandedParameterPack=*/false), |
4201 | Decl(const_cast<TypedefNameDecl*>(D)) { |
4202 | assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type" ) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4202, __PRETTY_FUNCTION__)); |
4203 | } |
4204 | |
4205 | public: |
4206 | TypedefNameDecl *getDecl() const { return Decl; } |
4207 | |
4208 | bool isSugared() const { return true; } |
4209 | QualType desugar() const; |
4210 | |
4211 | static bool classof(const Type *T) { return T->getTypeClass() == Typedef; } |
4212 | }; |
4213 | |
4214 | /// Sugar type that represents a type that was qualified by a qualifier written |
4215 | /// as a macro invocation. |
4216 | class MacroQualifiedType : public Type { |
4217 | friend class ASTContext; // ASTContext creates these. |
4218 | |
4219 | QualType UnderlyingTy; |
4220 | const IdentifierInfo *MacroII; |
4221 | |
4222 | MacroQualifiedType(QualType UnderlyingTy, QualType CanonTy, |
4223 | const IdentifierInfo *MacroII) |
4224 | : Type(MacroQualified, CanonTy, UnderlyingTy->isDependentType(), |
4225 | UnderlyingTy->isInstantiationDependentType(), |
4226 | UnderlyingTy->isVariablyModifiedType(), |
4227 | UnderlyingTy->containsUnexpandedParameterPack()), |
4228 | UnderlyingTy(UnderlyingTy), MacroII(MacroII) { |
4229 | assert(isa<AttributedType>(UnderlyingTy) &&((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types." ) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4230, __PRETTY_FUNCTION__)) |
4230 | "Expected a macro qualified type to only wrap attributed types.")((isa<AttributedType>(UnderlyingTy) && "Expected a macro qualified type to only wrap attributed types." ) ? static_cast<void> (0) : __assert_fail ("isa<AttributedType>(UnderlyingTy) && \"Expected a macro qualified type to only wrap attributed types.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4230, __PRETTY_FUNCTION__)); |
4231 | } |
4232 | |
4233 | public: |
4234 | const IdentifierInfo *getMacroIdentifier() const { return MacroII; } |
4235 | QualType getUnderlyingType() const { return UnderlyingTy; } |
4236 | |
4237 | /// Return this attributed type's modified type with no qualifiers attached to |
4238 | /// it. |
4239 | QualType getModifiedType() const; |
4240 | |
4241 | bool isSugared() const { return true; } |
4242 | QualType desugar() const; |
4243 | |
4244 | static bool classof(const Type *T) { |
4245 | return T->getTypeClass() == MacroQualified; |
4246 | } |
4247 | }; |
4248 | |
4249 | /// Represents a `typeof` (or __typeof__) expression (a GCC extension). |
4250 | class TypeOfExprType : public Type { |
4251 | Expr *TOExpr; |
4252 | |
4253 | protected: |
4254 | friend class ASTContext; // ASTContext creates these. |
4255 | |
4256 | TypeOfExprType(Expr *E, QualType can = QualType()); |
4257 | |
4258 | public: |
4259 | Expr *getUnderlyingExpr() const { return TOExpr; } |
4260 | |
4261 | /// Remove a single level of sugar. |
4262 | QualType desugar() const; |
4263 | |
4264 | /// Returns whether this type directly provides sugar. |
4265 | bool isSugared() const; |
4266 | |
4267 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOfExpr; } |
4268 | }; |
4269 | |
4270 | /// Internal representation of canonical, dependent |
4271 | /// `typeof(expr)` types. |
4272 | /// |
4273 | /// This class is used internally by the ASTContext to manage |
4274 | /// canonical, dependent types, only. Clients will only see instances |
4275 | /// of this class via TypeOfExprType nodes. |
4276 | class DependentTypeOfExprType |
4277 | : public TypeOfExprType, public llvm::FoldingSetNode { |
4278 | const ASTContext &Context; |
4279 | |
4280 | public: |
4281 | DependentTypeOfExprType(const ASTContext &Context, Expr *E) |
4282 | : TypeOfExprType(E), Context(Context) {} |
4283 | |
4284 | void Profile(llvm::FoldingSetNodeID &ID) { |
4285 | Profile(ID, Context, getUnderlyingExpr()); |
4286 | } |
4287 | |
4288 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4289 | Expr *E); |
4290 | }; |
4291 | |
4292 | /// Represents `typeof(type)`, a GCC extension. |
4293 | class TypeOfType : public Type { |
4294 | friend class ASTContext; // ASTContext creates these. |
4295 | |
4296 | QualType TOType; |
4297 | |
4298 | TypeOfType(QualType T, QualType can) |
4299 | : Type(TypeOf, can, T->isDependentType(), |
4300 | T->isInstantiationDependentType(), |
4301 | T->isVariablyModifiedType(), |
4302 | T->containsUnexpandedParameterPack()), |
4303 | TOType(T) { |
4304 | assert(!isa<TypedefType>(can) && "Invalid canonical type")((!isa<TypedefType>(can) && "Invalid canonical type" ) ? static_cast<void> (0) : __assert_fail ("!isa<TypedefType>(can) && \"Invalid canonical type\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4304, __PRETTY_FUNCTION__)); |
4305 | } |
4306 | |
4307 | public: |
4308 | QualType getUnderlyingType() const { return TOType; } |
4309 | |
4310 | /// Remove a single level of sugar. |
4311 | QualType desugar() const { return getUnderlyingType(); } |
4312 | |
4313 | /// Returns whether this type directly provides sugar. |
4314 | bool isSugared() const { return true; } |
4315 | |
4316 | static bool classof(const Type *T) { return T->getTypeClass() == TypeOf; } |
4317 | }; |
4318 | |
4319 | /// Represents the type `decltype(expr)` (C++11). |
4320 | class DecltypeType : public Type { |
4321 | Expr *E; |
4322 | QualType UnderlyingType; |
4323 | |
4324 | protected: |
4325 | friend class ASTContext; // ASTContext creates these. |
4326 | |
4327 | DecltypeType(Expr *E, QualType underlyingType, QualType can = QualType()); |
4328 | |
4329 | public: |
4330 | Expr *getUnderlyingExpr() const { return E; } |
4331 | QualType getUnderlyingType() const { return UnderlyingType; } |
4332 | |
4333 | /// Remove a single level of sugar. |
4334 | QualType desugar() const; |
4335 | |
4336 | /// Returns whether this type directly provides sugar. |
4337 | bool isSugared() const; |
4338 | |
4339 | static bool classof(const Type *T) { return T->getTypeClass() == Decltype; } |
4340 | }; |
4341 | |
4342 | /// Internal representation of canonical, dependent |
4343 | /// decltype(expr) types. |
4344 | /// |
4345 | /// This class is used internally by the ASTContext to manage |
4346 | /// canonical, dependent types, only. Clients will only see instances |
4347 | /// of this class via DecltypeType nodes. |
4348 | class DependentDecltypeType : public DecltypeType, public llvm::FoldingSetNode { |
4349 | const ASTContext &Context; |
4350 | |
4351 | public: |
4352 | DependentDecltypeType(const ASTContext &Context, Expr *E); |
4353 | |
4354 | void Profile(llvm::FoldingSetNodeID &ID) { |
4355 | Profile(ID, Context, getUnderlyingExpr()); |
4356 | } |
4357 | |
4358 | static void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context, |
4359 | Expr *E); |
4360 | }; |
4361 | |
4362 | /// A unary type transform, which is a type constructed from another. |
4363 | class UnaryTransformType : public Type { |
4364 | public: |
4365 | enum UTTKind { |
4366 | EnumUnderlyingType |
4367 | }; |
4368 | |
4369 | private: |
4370 | /// The untransformed type. |
4371 | QualType BaseType; |
4372 | |
4373 | /// The transformed type if not dependent, otherwise the same as BaseType. |
4374 | QualType UnderlyingType; |
4375 | |
4376 | UTTKind UKind; |
4377 | |
4378 | protected: |
4379 | friend class ASTContext; |
4380 | |
4381 | UnaryTransformType(QualType BaseTy, QualType UnderlyingTy, UTTKind UKind, |
4382 | QualType CanonicalTy); |
4383 | |
4384 | public: |
4385 | bool isSugared() const { return !isDependentType(); } |
4386 | QualType desugar() const { return UnderlyingType; } |
4387 | |
4388 | QualType getUnderlyingType() const { return UnderlyingType; } |
4389 | QualType getBaseType() const { return BaseType; } |
4390 | |
4391 | UTTKind getUTTKind() const { return UKind; } |
4392 | |
4393 | static bool classof(const Type *T) { |
4394 | return T->getTypeClass() == UnaryTransform; |
4395 | } |
4396 | }; |
4397 | |
4398 | /// Internal representation of canonical, dependent |
4399 | /// __underlying_type(type) types. |
4400 | /// |
4401 | /// This class is used internally by the ASTContext to manage |
4402 | /// canonical, dependent types, only. Clients will only see instances |
4403 | /// of this class via UnaryTransformType nodes. |
4404 | class DependentUnaryTransformType : public UnaryTransformType, |
4405 | public llvm::FoldingSetNode { |
4406 | public: |
4407 | DependentUnaryTransformType(const ASTContext &C, QualType BaseType, |
4408 | UTTKind UKind); |
4409 | |
4410 | void Profile(llvm::FoldingSetNodeID &ID) { |
4411 | Profile(ID, getBaseType(), getUTTKind()); |
4412 | } |
4413 | |
4414 | static void Profile(llvm::FoldingSetNodeID &ID, QualType BaseType, |
4415 | UTTKind UKind) { |
4416 | ID.AddPointer(BaseType.getAsOpaquePtr()); |
4417 | ID.AddInteger((unsigned)UKind); |
4418 | } |
4419 | }; |
4420 | |
4421 | class TagType : public Type { |
4422 | friend class ASTReader; |
4423 | |
4424 | /// Stores the TagDecl associated with this type. The decl may point to any |
4425 | /// TagDecl that declares the entity. |
4426 | TagDecl *decl; |
4427 | |
4428 | protected: |
4429 | TagType(TypeClass TC, const TagDecl *D, QualType can); |
4430 | |
4431 | public: |
4432 | TagDecl *getDecl() const; |
4433 | |
4434 | /// Determines whether this type is in the process of being defined. |
4435 | bool isBeingDefined() const; |
4436 | |
4437 | static bool classof(const Type *T) { |
4438 | return T->getTypeClass() == Enum || T->getTypeClass() == Record; |
4439 | } |
4440 | }; |
4441 | |
4442 | /// A helper class that allows the use of isa/cast/dyncast |
4443 | /// to detect TagType objects of structs/unions/classes. |
4444 | class RecordType : public TagType { |
4445 | protected: |
4446 | friend class ASTContext; // ASTContext creates these. |
4447 | |
4448 | explicit RecordType(const RecordDecl *D) |
4449 | : TagType(Record, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4450 | explicit RecordType(TypeClass TC, RecordDecl *D) |
4451 | : TagType(TC, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4452 | |
4453 | public: |
4454 | RecordDecl *getDecl() const { |
4455 | return reinterpret_cast<RecordDecl*>(TagType::getDecl()); |
4456 | } |
4457 | |
4458 | /// Recursively check all fields in the record for const-ness. If any field |
4459 | /// is declared const, return true. Otherwise, return false. |
4460 | bool hasConstFields() const; |
4461 | |
4462 | bool isSugared() const { return false; } |
4463 | QualType desugar() const { return QualType(this, 0); } |
4464 | |
4465 | static bool classof(const Type *T) { return T->getTypeClass() == Record; } |
4466 | }; |
4467 | |
4468 | /// A helper class that allows the use of isa/cast/dyncast |
4469 | /// to detect TagType objects of enums. |
4470 | class EnumType : public TagType { |
4471 | friend class ASTContext; // ASTContext creates these. |
4472 | |
4473 | explicit EnumType(const EnumDecl *D) |
4474 | : TagType(Enum, reinterpret_cast<const TagDecl*>(D), QualType()) {} |
4475 | |
4476 | public: |
4477 | EnumDecl *getDecl() const { |
4478 | return reinterpret_cast<EnumDecl*>(TagType::getDecl()); |
4479 | } |
4480 | |
4481 | bool isSugared() const { return false; } |
4482 | QualType desugar() const { return QualType(this, 0); } |
4483 | |
4484 | static bool classof(const Type *T) { return T->getTypeClass() == Enum; } |
4485 | }; |
4486 | |
4487 | /// An attributed type is a type to which a type attribute has been applied. |
4488 | /// |
4489 | /// The "modified type" is the fully-sugared type to which the attributed |
4490 | /// type was applied; generally it is not canonically equivalent to the |
4491 | /// attributed type. The "equivalent type" is the minimally-desugared type |
4492 | /// which the type is canonically equivalent to. |
4493 | /// |
4494 | /// For example, in the following attributed type: |
4495 | /// int32_t __attribute__((vector_size(16))) |
4496 | /// - the modified type is the TypedefType for int32_t |
4497 | /// - the equivalent type is VectorType(16, int32_t) |
4498 | /// - the canonical type is VectorType(16, int) |
4499 | class AttributedType : public Type, public llvm::FoldingSetNode { |
4500 | public: |
4501 | using Kind = attr::Kind; |
4502 | |
4503 | private: |
4504 | friend class ASTContext; // ASTContext creates these |
4505 | |
4506 | QualType ModifiedType; |
4507 | QualType EquivalentType; |
4508 | |
4509 | AttributedType(QualType canon, attr::Kind attrKind, QualType modified, |
4510 | QualType equivalent) |
4511 | : Type(Attributed, canon, equivalent->isDependentType(), |
4512 | equivalent->isInstantiationDependentType(), |
4513 | equivalent->isVariablyModifiedType(), |
4514 | equivalent->containsUnexpandedParameterPack()), |
4515 | ModifiedType(modified), EquivalentType(equivalent) { |
4516 | AttributedTypeBits.AttrKind = attrKind; |
4517 | } |
4518 | |
4519 | public: |
4520 | Kind getAttrKind() const { |
4521 | return static_cast<Kind>(AttributedTypeBits.AttrKind); |
4522 | } |
4523 | |
4524 | QualType getModifiedType() const { return ModifiedType; } |
4525 | QualType getEquivalentType() const { return EquivalentType; } |
4526 | |
4527 | bool isSugared() const { return true; } |
4528 | QualType desugar() const { return getEquivalentType(); } |
4529 | |
4530 | /// Does this attribute behave like a type qualifier? |
4531 | /// |
4532 | /// A type qualifier adjusts a type to provide specialized rules for |
4533 | /// a specific object, like the standard const and volatile qualifiers. |
4534 | /// This includes attributes controlling things like nullability, |
4535 | /// address spaces, and ARC ownership. The value of the object is still |
4536 | /// largely described by the modified type. |
4537 | /// |
4538 | /// In contrast, many type attributes "rewrite" their modified type to |
4539 | /// produce a fundamentally different type, not necessarily related in any |
4540 | /// formalizable way to the original type. For example, calling convention |
4541 | /// and vector attributes are not simple type qualifiers. |
4542 | /// |
4543 | /// Type qualifiers are often, but not always, reflected in the canonical |
4544 | /// type. |
4545 | bool isQualifier() const; |
4546 | |
4547 | bool isMSTypeSpec() const; |
4548 | |
4549 | bool isCallingConv() const; |
4550 | |
4551 | llvm::Optional<NullabilityKind> getImmediateNullability() const; |
4552 | |
4553 | /// Retrieve the attribute kind corresponding to the given |
4554 | /// nullability kind. |
4555 | static Kind getNullabilityAttrKind(NullabilityKind kind) { |
4556 | switch (kind) { |
4557 | case NullabilityKind::NonNull: |
4558 | return attr::TypeNonNull; |
4559 | |
4560 | case NullabilityKind::Nullable: |
4561 | return attr::TypeNullable; |
4562 | |
4563 | case NullabilityKind::Unspecified: |
4564 | return attr::TypeNullUnspecified; |
4565 | } |
4566 | llvm_unreachable("Unknown nullability kind.")::llvm::llvm_unreachable_internal("Unknown nullability kind." , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4566); |
4567 | } |
4568 | |
4569 | /// Strip off the top-level nullability annotation on the given |
4570 | /// type, if it's there. |
4571 | /// |
4572 | /// \param T The type to strip. If the type is exactly an |
4573 | /// AttributedType specifying nullability (without looking through |
4574 | /// type sugar), the nullability is returned and this type changed |
4575 | /// to the underlying modified type. |
4576 | /// |
4577 | /// \returns the top-level nullability, if present. |
4578 | static Optional<NullabilityKind> stripOuterNullability(QualType &T); |
4579 | |
4580 | void Profile(llvm::FoldingSetNodeID &ID) { |
4581 | Profile(ID, getAttrKind(), ModifiedType, EquivalentType); |
4582 | } |
4583 | |
4584 | static void Profile(llvm::FoldingSetNodeID &ID, Kind attrKind, |
4585 | QualType modified, QualType equivalent) { |
4586 | ID.AddInteger(attrKind); |
4587 | ID.AddPointer(modified.getAsOpaquePtr()); |
4588 | ID.AddPointer(equivalent.getAsOpaquePtr()); |
4589 | } |
4590 | |
4591 | static bool classof(const Type *T) { |
4592 | return T->getTypeClass() == Attributed; |
4593 | } |
4594 | }; |
4595 | |
4596 | class TemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4597 | friend class ASTContext; // ASTContext creates these |
4598 | |
4599 | // Helper data collector for canonical types. |
4600 | struct CanonicalTTPTInfo { |
4601 | unsigned Depth : 15; |
4602 | unsigned ParameterPack : 1; |
4603 | unsigned Index : 16; |
4604 | }; |
4605 | |
4606 | union { |
4607 | // Info for the canonical type. |
4608 | CanonicalTTPTInfo CanTTPTInfo; |
4609 | |
4610 | // Info for the non-canonical type. |
4611 | TemplateTypeParmDecl *TTPDecl; |
4612 | }; |
4613 | |
4614 | /// Build a non-canonical type. |
4615 | TemplateTypeParmType(TemplateTypeParmDecl *TTPDecl, QualType Canon) |
4616 | : Type(TemplateTypeParm, Canon, /*Dependent=*/true, |
4617 | /*InstantiationDependent=*/true, |
4618 | /*VariablyModified=*/false, |
4619 | Canon->containsUnexpandedParameterPack()), |
4620 | TTPDecl(TTPDecl) {} |
4621 | |
4622 | /// Build the canonical type. |
4623 | TemplateTypeParmType(unsigned D, unsigned I, bool PP) |
4624 | : Type(TemplateTypeParm, QualType(this, 0), |
4625 | /*Dependent=*/true, |
4626 | /*InstantiationDependent=*/true, |
4627 | /*VariablyModified=*/false, PP) { |
4628 | CanTTPTInfo.Depth = D; |
4629 | CanTTPTInfo.Index = I; |
4630 | CanTTPTInfo.ParameterPack = PP; |
4631 | } |
4632 | |
4633 | const CanonicalTTPTInfo& getCanTTPTInfo() const { |
4634 | QualType Can = getCanonicalTypeInternal(); |
4635 | return Can->castAs<TemplateTypeParmType>()->CanTTPTInfo; |
4636 | } |
4637 | |
4638 | public: |
4639 | unsigned getDepth() const { return getCanTTPTInfo().Depth; } |
4640 | unsigned getIndex() const { return getCanTTPTInfo().Index; } |
4641 | bool isParameterPack() const { return getCanTTPTInfo().ParameterPack; } |
4642 | |
4643 | TemplateTypeParmDecl *getDecl() const { |
4644 | return isCanonicalUnqualified() ? nullptr : TTPDecl; |
4645 | } |
4646 | |
4647 | IdentifierInfo *getIdentifier() const; |
4648 | |
4649 | bool isSugared() const { return false; } |
4650 | QualType desugar() const { return QualType(this, 0); } |
4651 | |
4652 | void Profile(llvm::FoldingSetNodeID &ID) { |
4653 | Profile(ID, getDepth(), getIndex(), isParameterPack(), getDecl()); |
4654 | } |
4655 | |
4656 | static void Profile(llvm::FoldingSetNodeID &ID, unsigned Depth, |
4657 | unsigned Index, bool ParameterPack, |
4658 | TemplateTypeParmDecl *TTPDecl) { |
4659 | ID.AddInteger(Depth); |
4660 | ID.AddInteger(Index); |
4661 | ID.AddBoolean(ParameterPack); |
4662 | ID.AddPointer(TTPDecl); |
4663 | } |
4664 | |
4665 | static bool classof(const Type *T) { |
4666 | return T->getTypeClass() == TemplateTypeParm; |
4667 | } |
4668 | }; |
4669 | |
4670 | /// Represents the result of substituting a type for a template |
4671 | /// type parameter. |
4672 | /// |
4673 | /// Within an instantiated template, all template type parameters have |
4674 | /// been replaced with these. They are used solely to record that a |
4675 | /// type was originally written as a template type parameter; |
4676 | /// therefore they are never canonical. |
4677 | class SubstTemplateTypeParmType : public Type, public llvm::FoldingSetNode { |
4678 | friend class ASTContext; |
4679 | |
4680 | // The original type parameter. |
4681 | const TemplateTypeParmType *Replaced; |
4682 | |
4683 | SubstTemplateTypeParmType(const TemplateTypeParmType *Param, QualType Canon) |
4684 | : Type(SubstTemplateTypeParm, Canon, Canon->isDependentType(), |
4685 | Canon->isInstantiationDependentType(), |
4686 | Canon->isVariablyModifiedType(), |
4687 | Canon->containsUnexpandedParameterPack()), |
4688 | Replaced(Param) {} |
4689 | |
4690 | public: |
4691 | /// Gets the template parameter that was substituted for. |
4692 | const TemplateTypeParmType *getReplacedParameter() const { |
4693 | return Replaced; |
4694 | } |
4695 | |
4696 | /// Gets the type that was substituted for the template |
4697 | /// parameter. |
4698 | QualType getReplacementType() const { |
4699 | return getCanonicalTypeInternal(); |
4700 | } |
4701 | |
4702 | bool isSugared() const { return true; } |
4703 | QualType desugar() const { return getReplacementType(); } |
4704 | |
4705 | void Profile(llvm::FoldingSetNodeID &ID) { |
4706 | Profile(ID, getReplacedParameter(), getReplacementType()); |
4707 | } |
4708 | |
4709 | static void Profile(llvm::FoldingSetNodeID &ID, |
4710 | const TemplateTypeParmType *Replaced, |
4711 | QualType Replacement) { |
4712 | ID.AddPointer(Replaced); |
4713 | ID.AddPointer(Replacement.getAsOpaquePtr()); |
4714 | } |
4715 | |
4716 | static bool classof(const Type *T) { |
4717 | return T->getTypeClass() == SubstTemplateTypeParm; |
4718 | } |
4719 | }; |
4720 | |
4721 | /// Represents the result of substituting a set of types for a template |
4722 | /// type parameter pack. |
4723 | /// |
4724 | /// When a pack expansion in the source code contains multiple parameter packs |
4725 | /// and those parameter packs correspond to different levels of template |
4726 | /// parameter lists, this type node is used to represent a template type |
4727 | /// parameter pack from an outer level, which has already had its argument pack |
4728 | /// substituted but that still lives within a pack expansion that itself |
4729 | /// could not be instantiated. When actually performing a substitution into |
4730 | /// that pack expansion (e.g., when all template parameters have corresponding |
4731 | /// arguments), this type will be replaced with the \c SubstTemplateTypeParmType |
4732 | /// at the current pack substitution index. |
4733 | class SubstTemplateTypeParmPackType : public Type, public llvm::FoldingSetNode { |
4734 | friend class ASTContext; |
4735 | |
4736 | /// The original type parameter. |
4737 | const TemplateTypeParmType *Replaced; |
4738 | |
4739 | /// A pointer to the set of template arguments that this |
4740 | /// parameter pack is instantiated with. |
4741 | const TemplateArgument *Arguments; |
4742 | |
4743 | SubstTemplateTypeParmPackType(const TemplateTypeParmType *Param, |
4744 | QualType Canon, |
4745 | const TemplateArgument &ArgPack); |
4746 | |
4747 | public: |
4748 | IdentifierInfo *getIdentifier() const { return Replaced->getIdentifier(); } |
4749 | |
4750 | /// Gets the template parameter that was substituted for. |
4751 | const TemplateTypeParmType *getReplacedParameter() const { |
4752 | return Replaced; |
4753 | } |
4754 | |
4755 | unsigned getNumArgs() const { |
4756 | return SubstTemplateTypeParmPackTypeBits.NumArgs; |
4757 | } |
4758 | |
4759 | bool isSugared() const { return false; } |
4760 | QualType desugar() const { return QualType(this, 0); } |
4761 | |
4762 | TemplateArgument getArgumentPack() const; |
4763 | |
4764 | void Profile(llvm::FoldingSetNodeID &ID); |
4765 | static void Profile(llvm::FoldingSetNodeID &ID, |
4766 | const TemplateTypeParmType *Replaced, |
4767 | const TemplateArgument &ArgPack); |
4768 | |
4769 | static bool classof(const Type *T) { |
4770 | return T->getTypeClass() == SubstTemplateTypeParmPack; |
4771 | } |
4772 | }; |
4773 | |
4774 | /// Common base class for placeholders for types that get replaced by |
4775 | /// placeholder type deduction: C++11 auto, C++14 decltype(auto), C++17 deduced |
4776 | /// class template types, and (eventually) constrained type names from the C++ |
4777 | /// Concepts TS. |
4778 | /// |
4779 | /// These types are usually a placeholder for a deduced type. However, before |
4780 | /// the initializer is attached, or (usually) if the initializer is |
4781 | /// type-dependent, there is no deduced type and the type is canonical. In |
4782 | /// the latter case, it is also a dependent type. |
4783 | class DeducedType : public Type { |
4784 | protected: |
4785 | DeducedType(TypeClass TC, QualType DeducedAsType, bool IsDependent, |
4786 | bool IsInstantiationDependent, bool ContainsParameterPack) |
4787 | : Type(TC, |
4788 | // FIXME: Retain the sugared deduced type? |
4789 | DeducedAsType.isNull() ? QualType(this, 0) |
4790 | : DeducedAsType.getCanonicalType(), |
4791 | IsDependent, IsInstantiationDependent, |
4792 | /*VariablyModified=*/false, ContainsParameterPack) { |
4793 | if (!DeducedAsType.isNull()) { |
4794 | if (DeducedAsType->isDependentType()) |
4795 | setDependent(); |
4796 | if (DeducedAsType->isInstantiationDependentType()) |
4797 | setInstantiationDependent(); |
4798 | if (DeducedAsType->containsUnexpandedParameterPack()) |
4799 | setContainsUnexpandedParameterPack(); |
4800 | } |
4801 | } |
4802 | |
4803 | public: |
4804 | bool isSugared() const { return !isCanonicalUnqualified(); } |
4805 | QualType desugar() const { return getCanonicalTypeInternal(); } |
4806 | |
4807 | /// Get the type deduced for this placeholder type, or null if it's |
4808 | /// either not been deduced or was deduced to a dependent type. |
4809 | QualType getDeducedType() const { |
4810 | return !isCanonicalUnqualified() ? getCanonicalTypeInternal() : QualType(); |
4811 | } |
4812 | bool isDeduced() const { |
4813 | return !isCanonicalUnqualified() || isDependentType(); |
4814 | } |
4815 | |
4816 | static bool classof(const Type *T) { |
4817 | return T->getTypeClass() == Auto || |
4818 | T->getTypeClass() == DeducedTemplateSpecialization; |
4819 | } |
4820 | }; |
4821 | |
4822 | /// Represents a C++11 auto or C++14 decltype(auto) type. |
4823 | class AutoType : public DeducedType, public llvm::FoldingSetNode { |
4824 | friend class ASTContext; // ASTContext creates these |
4825 | |
4826 | AutoType(QualType DeducedAsType, AutoTypeKeyword Keyword, |
4827 | bool IsDeducedAsDependent, bool IsDeducedAsPack) |
4828 | : DeducedType(Auto, DeducedAsType, IsDeducedAsDependent, |
4829 | IsDeducedAsDependent, IsDeducedAsPack) { |
4830 | AutoTypeBits.Keyword = (unsigned)Keyword; |
4831 | } |
4832 | |
4833 | public: |
4834 | bool isDecltypeAuto() const { |
4835 | return getKeyword() == AutoTypeKeyword::DecltypeAuto; |
4836 | } |
4837 | |
4838 | AutoTypeKeyword getKeyword() const { |
4839 | return (AutoTypeKeyword)AutoTypeBits.Keyword; |
4840 | } |
4841 | |
4842 | void Profile(llvm::FoldingSetNodeID &ID) { |
4843 | Profile(ID, getDeducedType(), getKeyword(), isDependentType(), |
4844 | containsUnexpandedParameterPack()); |
4845 | } |
4846 | |
4847 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Deduced, |
4848 | AutoTypeKeyword Keyword, bool IsDependent, bool IsPack) { |
4849 | ID.AddPointer(Deduced.getAsOpaquePtr()); |
4850 | ID.AddInteger((unsigned)Keyword); |
4851 | ID.AddBoolean(IsDependent); |
4852 | ID.AddBoolean(IsPack); |
4853 | } |
4854 | |
4855 | static bool classof(const Type *T) { |
4856 | return T->getTypeClass() == Auto; |
4857 | } |
4858 | }; |
4859 | |
4860 | /// Represents a C++17 deduced template specialization type. |
4861 | class DeducedTemplateSpecializationType : public DeducedType, |
4862 | public llvm::FoldingSetNode { |
4863 | friend class ASTContext; // ASTContext creates these |
4864 | |
4865 | /// The name of the template whose arguments will be deduced. |
4866 | TemplateName Template; |
4867 | |
4868 | DeducedTemplateSpecializationType(TemplateName Template, |
4869 | QualType DeducedAsType, |
4870 | bool IsDeducedAsDependent) |
4871 | : DeducedType(DeducedTemplateSpecialization, DeducedAsType, |
4872 | IsDeducedAsDependent || Template.isDependent(), |
4873 | IsDeducedAsDependent || Template.isInstantiationDependent(), |
4874 | Template.containsUnexpandedParameterPack()), |
4875 | Template(Template) {} |
4876 | |
4877 | public: |
4878 | /// Retrieve the name of the template that we are deducing. |
4879 | TemplateName getTemplateName() const { return Template;} |
4880 | |
4881 | void Profile(llvm::FoldingSetNodeID &ID) { |
4882 | Profile(ID, getTemplateName(), getDeducedType(), isDependentType()); |
4883 | } |
4884 | |
4885 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName Template, |
4886 | QualType Deduced, bool IsDependent) { |
4887 | Template.Profile(ID); |
4888 | ID.AddPointer(Deduced.getAsOpaquePtr()); |
4889 | ID.AddBoolean(IsDependent); |
4890 | } |
4891 | |
4892 | static bool classof(const Type *T) { |
4893 | return T->getTypeClass() == DeducedTemplateSpecialization; |
4894 | } |
4895 | }; |
4896 | |
4897 | /// Represents a type template specialization; the template |
4898 | /// must be a class template, a type alias template, or a template |
4899 | /// template parameter. A template which cannot be resolved to one of |
4900 | /// these, e.g. because it is written with a dependent scope |
4901 | /// specifier, is instead represented as a |
4902 | /// @c DependentTemplateSpecializationType. |
4903 | /// |
4904 | /// A non-dependent template specialization type is always "sugar", |
4905 | /// typically for a \c RecordType. For example, a class template |
4906 | /// specialization type of \c vector<int> will refer to a tag type for |
4907 | /// the instantiation \c std::vector<int, std::allocator<int>> |
4908 | /// |
4909 | /// Template specializations are dependent if either the template or |
4910 | /// any of the template arguments are dependent, in which case the |
4911 | /// type may also be canonical. |
4912 | /// |
4913 | /// Instances of this type are allocated with a trailing array of |
4914 | /// TemplateArguments, followed by a QualType representing the |
4915 | /// non-canonical aliased type when the template is a type alias |
4916 | /// template. |
4917 | class alignas(8) TemplateSpecializationType |
4918 | : public Type, |
4919 | public llvm::FoldingSetNode { |
4920 | friend class ASTContext; // ASTContext creates these |
4921 | |
4922 | /// The name of the template being specialized. This is |
4923 | /// either a TemplateName::Template (in which case it is a |
4924 | /// ClassTemplateDecl*, a TemplateTemplateParmDecl*, or a |
4925 | /// TypeAliasTemplateDecl*), a |
4926 | /// TemplateName::SubstTemplateTemplateParmPack, or a |
4927 | /// TemplateName::SubstTemplateTemplateParm (in which case the |
4928 | /// replacement must, recursively, be one of these). |
4929 | TemplateName Template; |
4930 | |
4931 | TemplateSpecializationType(TemplateName T, |
4932 | ArrayRef<TemplateArgument> Args, |
4933 | QualType Canon, |
4934 | QualType Aliased); |
4935 | |
4936 | public: |
4937 | /// Determine whether any of the given template arguments are dependent. |
4938 | static bool anyDependentTemplateArguments(ArrayRef<TemplateArgumentLoc> Args, |
4939 | bool &InstantiationDependent); |
4940 | |
4941 | static bool anyDependentTemplateArguments(const TemplateArgumentListInfo &, |
4942 | bool &InstantiationDependent); |
4943 | |
4944 | /// True if this template specialization type matches a current |
4945 | /// instantiation in the context in which it is found. |
4946 | bool isCurrentInstantiation() const { |
4947 | return isa<InjectedClassNameType>(getCanonicalTypeInternal()); |
4948 | } |
4949 | |
4950 | /// Determine if this template specialization type is for a type alias |
4951 | /// template that has been substituted. |
4952 | /// |
4953 | /// Nearly every template specialization type whose template is an alias |
4954 | /// template will be substituted. However, this is not the case when |
4955 | /// the specialization contains a pack expansion but the template alias |
4956 | /// does not have a corresponding parameter pack, e.g., |
4957 | /// |
4958 | /// \code |
4959 | /// template<typename T, typename U, typename V> struct S; |
4960 | /// template<typename T, typename U> using A = S<T, int, U>; |
4961 | /// template<typename... Ts> struct X { |
4962 | /// typedef A<Ts...> type; // not a type alias |
4963 | /// }; |
4964 | /// \endcode |
4965 | bool isTypeAlias() const { return TemplateSpecializationTypeBits.TypeAlias; } |
4966 | |
4967 | /// Get the aliased type, if this is a specialization of a type alias |
4968 | /// template. |
4969 | QualType getAliasedType() const { |
4970 | assert(isTypeAlias() && "not a type alias template specialization")((isTypeAlias() && "not a type alias template specialization" ) ? static_cast<void> (0) : __assert_fail ("isTypeAlias() && \"not a type alias template specialization\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 4970, __PRETTY_FUNCTION__)); |
4971 | return *reinterpret_cast<const QualType*>(end()); |
4972 | } |
4973 | |
4974 | using iterator = const TemplateArgument *; |
4975 | |
4976 | iterator begin() const { return getArgs(); } |
4977 | iterator end() const; // defined inline in TemplateBase.h |
4978 | |
4979 | /// Retrieve the name of the template that we are specializing. |
4980 | TemplateName getTemplateName() const { return Template; } |
4981 | |
4982 | /// Retrieve the template arguments. |
4983 | const TemplateArgument *getArgs() const { |
4984 | return reinterpret_cast<const TemplateArgument *>(this + 1); |
4985 | } |
4986 | |
4987 | /// Retrieve the number of template arguments. |
4988 | unsigned getNumArgs() const { |
4989 | return TemplateSpecializationTypeBits.NumArgs; |
4990 | } |
4991 | |
4992 | /// Retrieve a specific template argument as a type. |
4993 | /// \pre \c isArgType(Arg) |
4994 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
4995 | |
4996 | ArrayRef<TemplateArgument> template_arguments() const { |
4997 | return {getArgs(), getNumArgs()}; |
4998 | } |
4999 | |
5000 | bool isSugared() const { |
5001 | return !isDependentType() || isCurrentInstantiation() || isTypeAlias(); |
5002 | } |
5003 | |
5004 | QualType desugar() const { |
5005 | return isTypeAlias() ? getAliasedType() : getCanonicalTypeInternal(); |
5006 | } |
5007 | |
5008 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Ctx) { |
5009 | Profile(ID, Template, template_arguments(), Ctx); |
5010 | if (isTypeAlias()) |
5011 | getAliasedType().Profile(ID); |
5012 | } |
5013 | |
5014 | static void Profile(llvm::FoldingSetNodeID &ID, TemplateName T, |
5015 | ArrayRef<TemplateArgument> Args, |
5016 | const ASTContext &Context); |
5017 | |
5018 | static bool classof(const Type *T) { |
5019 | return T->getTypeClass() == TemplateSpecialization; |
5020 | } |
5021 | }; |
5022 | |
5023 | /// Print a template argument list, including the '<' and '>' |
5024 | /// enclosing the template arguments. |
5025 | void printTemplateArgumentList(raw_ostream &OS, |
5026 | ArrayRef<TemplateArgument> Args, |
5027 | const PrintingPolicy &Policy); |
5028 | |
5029 | void printTemplateArgumentList(raw_ostream &OS, |
5030 | ArrayRef<TemplateArgumentLoc> Args, |
5031 | const PrintingPolicy &Policy); |
5032 | |
5033 | void printTemplateArgumentList(raw_ostream &OS, |
5034 | const TemplateArgumentListInfo &Args, |
5035 | const PrintingPolicy &Policy); |
5036 | |
5037 | /// The injected class name of a C++ class template or class |
5038 | /// template partial specialization. Used to record that a type was |
5039 | /// spelled with a bare identifier rather than as a template-id; the |
5040 | /// equivalent for non-templated classes is just RecordType. |
5041 | /// |
5042 | /// Injected class name types are always dependent. Template |
5043 | /// instantiation turns these into RecordTypes. |
5044 | /// |
5045 | /// Injected class name types are always canonical. This works |
5046 | /// because it is impossible to compare an injected class name type |
5047 | /// with the corresponding non-injected template type, for the same |
5048 | /// reason that it is impossible to directly compare template |
5049 | /// parameters from different dependent contexts: injected class name |
5050 | /// types can only occur within the scope of a particular templated |
5051 | /// declaration, and within that scope every template specialization |
5052 | /// will canonicalize to the injected class name (when appropriate |
5053 | /// according to the rules of the language). |
5054 | class InjectedClassNameType : public Type { |
5055 | friend class ASTContext; // ASTContext creates these. |
5056 | friend class ASTNodeImporter; |
5057 | friend class ASTReader; // FIXME: ASTContext::getInjectedClassNameType is not |
5058 | // currently suitable for AST reading, too much |
5059 | // interdependencies. |
5060 | |
5061 | CXXRecordDecl *Decl; |
5062 | |
5063 | /// The template specialization which this type represents. |
5064 | /// For example, in |
5065 | /// template <class T> class A { ... }; |
5066 | /// this is A<T>, whereas in |
5067 | /// template <class X, class Y> class A<B<X,Y> > { ... }; |
5068 | /// this is A<B<X,Y> >. |
5069 | /// |
5070 | /// It is always unqualified, always a template specialization type, |
5071 | /// and always dependent. |
5072 | QualType InjectedType; |
5073 | |
5074 | InjectedClassNameType(CXXRecordDecl *D, QualType TST) |
5075 | : Type(InjectedClassName, QualType(), /*Dependent=*/true, |
5076 | /*InstantiationDependent=*/true, |
5077 | /*VariablyModified=*/false, |
5078 | /*ContainsUnexpandedParameterPack=*/false), |
5079 | Decl(D), InjectedType(TST) { |
5080 | assert(isa<TemplateSpecializationType>(TST))((isa<TemplateSpecializationType>(TST)) ? static_cast< void> (0) : __assert_fail ("isa<TemplateSpecializationType>(TST)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5080, __PRETTY_FUNCTION__)); |
5081 | assert(!TST.hasQualifiers())((!TST.hasQualifiers()) ? static_cast<void> (0) : __assert_fail ("!TST.hasQualifiers()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5081, __PRETTY_FUNCTION__)); |
5082 | assert(TST->isDependentType())((TST->isDependentType()) ? static_cast<void> (0) : __assert_fail ("TST->isDependentType()", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5082, __PRETTY_FUNCTION__)); |
5083 | } |
5084 | |
5085 | public: |
5086 | QualType getInjectedSpecializationType() const { return InjectedType; } |
5087 | |
5088 | const TemplateSpecializationType *getInjectedTST() const { |
5089 | return cast<TemplateSpecializationType>(InjectedType.getTypePtr()); |
5090 | } |
5091 | |
5092 | TemplateName getTemplateName() const { |
5093 | return getInjectedTST()->getTemplateName(); |
5094 | } |
5095 | |
5096 | CXXRecordDecl *getDecl() const; |
5097 | |
5098 | bool isSugared() const { return false; } |
5099 | QualType desugar() const { return QualType(this, 0); } |
5100 | |
5101 | static bool classof(const Type *T) { |
5102 | return T->getTypeClass() == InjectedClassName; |
5103 | } |
5104 | }; |
5105 | |
5106 | /// The kind of a tag type. |
5107 | enum TagTypeKind { |
5108 | /// The "struct" keyword. |
5109 | TTK_Struct, |
5110 | |
5111 | /// The "__interface" keyword. |
5112 | TTK_Interface, |
5113 | |
5114 | /// The "union" keyword. |
5115 | TTK_Union, |
5116 | |
5117 | /// The "class" keyword. |
5118 | TTK_Class, |
5119 | |
5120 | /// The "enum" keyword. |
5121 | TTK_Enum |
5122 | }; |
5123 | |
5124 | /// The elaboration keyword that precedes a qualified type name or |
5125 | /// introduces an elaborated-type-specifier. |
5126 | enum ElaboratedTypeKeyword { |
5127 | /// The "struct" keyword introduces the elaborated-type-specifier. |
5128 | ETK_Struct, |
5129 | |
5130 | /// The "__interface" keyword introduces the elaborated-type-specifier. |
5131 | ETK_Interface, |
5132 | |
5133 | /// The "union" keyword introduces the elaborated-type-specifier. |
5134 | ETK_Union, |
5135 | |
5136 | /// The "class" keyword introduces the elaborated-type-specifier. |
5137 | ETK_Class, |
5138 | |
5139 | /// The "enum" keyword introduces the elaborated-type-specifier. |
5140 | ETK_Enum, |
5141 | |
5142 | /// The "typename" keyword precedes the qualified type name, e.g., |
5143 | /// \c typename T::type. |
5144 | ETK_Typename, |
5145 | |
5146 | /// No keyword precedes the qualified type name. |
5147 | ETK_None |
5148 | }; |
5149 | |
5150 | /// A helper class for Type nodes having an ElaboratedTypeKeyword. |
5151 | /// The keyword in stored in the free bits of the base class. |
5152 | /// Also provides a few static helpers for converting and printing |
5153 | /// elaborated type keyword and tag type kind enumerations. |
5154 | class TypeWithKeyword : public Type { |
5155 | protected: |
5156 | TypeWithKeyword(ElaboratedTypeKeyword Keyword, TypeClass tc, |
5157 | QualType Canonical, bool Dependent, |
5158 | bool InstantiationDependent, bool VariablyModified, |
5159 | bool ContainsUnexpandedParameterPack) |
5160 | : Type(tc, Canonical, Dependent, InstantiationDependent, VariablyModified, |
5161 | ContainsUnexpandedParameterPack) { |
5162 | TypeWithKeywordBits.Keyword = Keyword; |
5163 | } |
5164 | |
5165 | public: |
5166 | ElaboratedTypeKeyword getKeyword() const { |
5167 | return static_cast<ElaboratedTypeKeyword>(TypeWithKeywordBits.Keyword); |
5168 | } |
5169 | |
5170 | /// Converts a type specifier (DeclSpec::TST) into an elaborated type keyword. |
5171 | static ElaboratedTypeKeyword getKeywordForTypeSpec(unsigned TypeSpec); |
5172 | |
5173 | /// Converts a type specifier (DeclSpec::TST) into a tag type kind. |
5174 | /// It is an error to provide a type specifier which *isn't* a tag kind here. |
5175 | static TagTypeKind getTagTypeKindForTypeSpec(unsigned TypeSpec); |
5176 | |
5177 | /// Converts a TagTypeKind into an elaborated type keyword. |
5178 | static ElaboratedTypeKeyword getKeywordForTagTypeKind(TagTypeKind Tag); |
5179 | |
5180 | /// Converts an elaborated type keyword into a TagTypeKind. |
5181 | /// It is an error to provide an elaborated type keyword |
5182 | /// which *isn't* a tag kind here. |
5183 | static TagTypeKind getTagTypeKindForKeyword(ElaboratedTypeKeyword Keyword); |
5184 | |
5185 | static bool KeywordIsTagTypeKind(ElaboratedTypeKeyword Keyword); |
5186 | |
5187 | static StringRef getKeywordName(ElaboratedTypeKeyword Keyword); |
5188 | |
5189 | static StringRef getTagTypeKindName(TagTypeKind Kind) { |
5190 | return getKeywordName(getKeywordForTagTypeKind(Kind)); |
5191 | } |
5192 | |
5193 | class CannotCastToThisType {}; |
5194 | static CannotCastToThisType classof(const Type *); |
5195 | }; |
5196 | |
5197 | /// Represents a type that was referred to using an elaborated type |
5198 | /// keyword, e.g., struct S, or via a qualified name, e.g., N::M::type, |
5199 | /// or both. |
5200 | /// |
5201 | /// This type is used to keep track of a type name as written in the |
5202 | /// source code, including tag keywords and any nested-name-specifiers. |
5203 | /// The type itself is always "sugar", used to express what was written |
5204 | /// in the source code but containing no additional semantic information. |
5205 | class ElaboratedType final |
5206 | : public TypeWithKeyword, |
5207 | public llvm::FoldingSetNode, |
5208 | private llvm::TrailingObjects<ElaboratedType, TagDecl *> { |
5209 | friend class ASTContext; // ASTContext creates these |
5210 | friend TrailingObjects; |
5211 | |
5212 | /// The nested name specifier containing the qualifier. |
5213 | NestedNameSpecifier *NNS; |
5214 | |
5215 | /// The type that this qualified name refers to. |
5216 | QualType NamedType; |
5217 | |
5218 | /// The (re)declaration of this tag type owned by this occurrence is stored |
5219 | /// as a trailing object if there is one. Use getOwnedTagDecl to obtain |
5220 | /// it, or obtain a null pointer if there is none. |
5221 | |
5222 | ElaboratedType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5223 | QualType NamedType, QualType CanonType, TagDecl *OwnedTagDecl) |
5224 | : TypeWithKeyword(Keyword, Elaborated, CanonType, |
5225 | NamedType->isDependentType(), |
5226 | NamedType->isInstantiationDependentType(), |
5227 | NamedType->isVariablyModifiedType(), |
5228 | NamedType->containsUnexpandedParameterPack()), |
5229 | NNS(NNS), NamedType(NamedType) { |
5230 | ElaboratedTypeBits.HasOwnedTagDecl = false; |
5231 | if (OwnedTagDecl) { |
5232 | ElaboratedTypeBits.HasOwnedTagDecl = true; |
5233 | *getTrailingObjects<TagDecl *>() = OwnedTagDecl; |
5234 | } |
5235 | assert(!(Keyword == ETK_None && NNS == nullptr) &&((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5237, __PRETTY_FUNCTION__)) |
5236 | "ElaboratedType cannot have elaborated type keyword "((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5237, __PRETTY_FUNCTION__)) |
5237 | "and name qualifier both null.")((!(Keyword == ETK_None && NNS == nullptr) && "ElaboratedType cannot have elaborated type keyword " "and name qualifier both null." ) ? static_cast<void> (0) : __assert_fail ("!(Keyword == ETK_None && NNS == nullptr) && \"ElaboratedType cannot have elaborated type keyword \" \"and name qualifier both null.\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5237, __PRETTY_FUNCTION__)); |
5238 | } |
5239 | |
5240 | public: |
5241 | /// Retrieve the qualification on this type. |
5242 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5243 | |
5244 | /// Retrieve the type named by the qualified-id. |
5245 | QualType getNamedType() const { return NamedType; } |
5246 | |
5247 | /// Remove a single level of sugar. |
5248 | QualType desugar() const { return getNamedType(); } |
5249 | |
5250 | /// Returns whether this type directly provides sugar. |
5251 | bool isSugared() const { return true; } |
5252 | |
5253 | /// Return the (re)declaration of this type owned by this occurrence of this |
5254 | /// type, or nullptr if there is none. |
5255 | TagDecl *getOwnedTagDecl() const { |
5256 | return ElaboratedTypeBits.HasOwnedTagDecl ? *getTrailingObjects<TagDecl *>() |
5257 | : nullptr; |
5258 | } |
5259 | |
5260 | void Profile(llvm::FoldingSetNodeID &ID) { |
5261 | Profile(ID, getKeyword(), NNS, NamedType, getOwnedTagDecl()); |
5262 | } |
5263 | |
5264 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5265 | NestedNameSpecifier *NNS, QualType NamedType, |
5266 | TagDecl *OwnedTagDecl) { |
5267 | ID.AddInteger(Keyword); |
5268 | ID.AddPointer(NNS); |
5269 | NamedType.Profile(ID); |
5270 | ID.AddPointer(OwnedTagDecl); |
5271 | } |
5272 | |
5273 | static bool classof(const Type *T) { return T->getTypeClass() == Elaborated; } |
5274 | }; |
5275 | |
5276 | /// Represents a qualified type name for which the type name is |
5277 | /// dependent. |
5278 | /// |
5279 | /// DependentNameType represents a class of dependent types that involve a |
5280 | /// possibly dependent nested-name-specifier (e.g., "T::") followed by a |
5281 | /// name of a type. The DependentNameType may start with a "typename" (for a |
5282 | /// typename-specifier), "class", "struct", "union", or "enum" (for a |
5283 | /// dependent elaborated-type-specifier), or nothing (in contexts where we |
5284 | /// know that we must be referring to a type, e.g., in a base class specifier). |
5285 | /// Typically the nested-name-specifier is dependent, but in MSVC compatibility |
5286 | /// mode, this type is used with non-dependent names to delay name lookup until |
5287 | /// instantiation. |
5288 | class DependentNameType : public TypeWithKeyword, public llvm::FoldingSetNode { |
5289 | friend class ASTContext; // ASTContext creates these |
5290 | |
5291 | /// The nested name specifier containing the qualifier. |
5292 | NestedNameSpecifier *NNS; |
5293 | |
5294 | /// The type that this typename specifier refers to. |
5295 | const IdentifierInfo *Name; |
5296 | |
5297 | DependentNameType(ElaboratedTypeKeyword Keyword, NestedNameSpecifier *NNS, |
5298 | const IdentifierInfo *Name, QualType CanonType) |
5299 | : TypeWithKeyword(Keyword, DependentName, CanonType, /*Dependent=*/true, |
5300 | /*InstantiationDependent=*/true, |
5301 | /*VariablyModified=*/false, |
5302 | NNS->containsUnexpandedParameterPack()), |
5303 | NNS(NNS), Name(Name) {} |
5304 | |
5305 | public: |
5306 | /// Retrieve the qualification on this type. |
5307 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5308 | |
5309 | /// Retrieve the type named by the typename specifier as an identifier. |
5310 | /// |
5311 | /// This routine will return a non-NULL identifier pointer when the |
5312 | /// form of the original typename was terminated by an identifier, |
5313 | /// e.g., "typename T::type". |
5314 | const IdentifierInfo *getIdentifier() const { |
5315 | return Name; |
5316 | } |
5317 | |
5318 | bool isSugared() const { return false; } |
5319 | QualType desugar() const { return QualType(this, 0); } |
5320 | |
5321 | void Profile(llvm::FoldingSetNodeID &ID) { |
5322 | Profile(ID, getKeyword(), NNS, Name); |
5323 | } |
5324 | |
5325 | static void Profile(llvm::FoldingSetNodeID &ID, ElaboratedTypeKeyword Keyword, |
5326 | NestedNameSpecifier *NNS, const IdentifierInfo *Name) { |
5327 | ID.AddInteger(Keyword); |
5328 | ID.AddPointer(NNS); |
5329 | ID.AddPointer(Name); |
5330 | } |
5331 | |
5332 | static bool classof(const Type *T) { |
5333 | return T->getTypeClass() == DependentName; |
5334 | } |
5335 | }; |
5336 | |
5337 | /// Represents a template specialization type whose template cannot be |
5338 | /// resolved, e.g. |
5339 | /// A<T>::template B<T> |
5340 | class alignas(8) DependentTemplateSpecializationType |
5341 | : public TypeWithKeyword, |
5342 | public llvm::FoldingSetNode { |
5343 | friend class ASTContext; // ASTContext creates these |
5344 | |
5345 | /// The nested name specifier containing the qualifier. |
5346 | NestedNameSpecifier *NNS; |
5347 | |
5348 | /// The identifier of the template. |
5349 | const IdentifierInfo *Name; |
5350 | |
5351 | DependentTemplateSpecializationType(ElaboratedTypeKeyword Keyword, |
5352 | NestedNameSpecifier *NNS, |
5353 | const IdentifierInfo *Name, |
5354 | ArrayRef<TemplateArgument> Args, |
5355 | QualType Canon); |
5356 | |
5357 | const TemplateArgument *getArgBuffer() const { |
5358 | return reinterpret_cast<const TemplateArgument*>(this+1); |
5359 | } |
5360 | |
5361 | TemplateArgument *getArgBuffer() { |
5362 | return reinterpret_cast<TemplateArgument*>(this+1); |
5363 | } |
5364 | |
5365 | public: |
5366 | NestedNameSpecifier *getQualifier() const { return NNS; } |
5367 | const IdentifierInfo *getIdentifier() const { return Name; } |
5368 | |
5369 | /// Retrieve the template arguments. |
5370 | const TemplateArgument *getArgs() const { |
5371 | return getArgBuffer(); |
5372 | } |
5373 | |
5374 | /// Retrieve the number of template arguments. |
5375 | unsigned getNumArgs() const { |
5376 | return DependentTemplateSpecializationTypeBits.NumArgs; |
5377 | } |
5378 | |
5379 | const TemplateArgument &getArg(unsigned Idx) const; // in TemplateBase.h |
5380 | |
5381 | ArrayRef<TemplateArgument> template_arguments() const { |
5382 | return {getArgs(), getNumArgs()}; |
5383 | } |
5384 | |
5385 | using iterator = const TemplateArgument *; |
5386 | |
5387 | iterator begin() const { return getArgs(); } |
5388 | iterator end() const; // inline in TemplateBase.h |
5389 | |
5390 | bool isSugared() const { return false; } |
5391 | QualType desugar() const { return QualType(this, 0); } |
5392 | |
5393 | void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &Context) { |
5394 | Profile(ID, Context, getKeyword(), NNS, Name, {getArgs(), getNumArgs()}); |
5395 | } |
5396 | |
5397 | static void Profile(llvm::FoldingSetNodeID &ID, |
5398 | const ASTContext &Context, |
5399 | ElaboratedTypeKeyword Keyword, |
5400 | NestedNameSpecifier *Qualifier, |
5401 | const IdentifierInfo *Name, |
5402 | ArrayRef<TemplateArgument> Args); |
5403 | |
5404 | static bool classof(const Type *T) { |
5405 | return T->getTypeClass() == DependentTemplateSpecialization; |
5406 | } |
5407 | }; |
5408 | |
5409 | /// Represents a pack expansion of types. |
5410 | /// |
5411 | /// Pack expansions are part of C++11 variadic templates. A pack |
5412 | /// expansion contains a pattern, which itself contains one or more |
5413 | /// "unexpanded" parameter packs. When instantiated, a pack expansion |
5414 | /// produces a series of types, each instantiated from the pattern of |
5415 | /// the expansion, where the Ith instantiation of the pattern uses the |
5416 | /// Ith arguments bound to each of the unexpanded parameter packs. The |
5417 | /// pack expansion is considered to "expand" these unexpanded |
5418 | /// parameter packs. |
5419 | /// |
5420 | /// \code |
5421 | /// template<typename ...Types> struct tuple; |
5422 | /// |
5423 | /// template<typename ...Types> |
5424 | /// struct tuple_of_references { |
5425 | /// typedef tuple<Types&...> type; |
5426 | /// }; |
5427 | /// \endcode |
5428 | /// |
5429 | /// Here, the pack expansion \c Types&... is represented via a |
5430 | /// PackExpansionType whose pattern is Types&. |
5431 | class PackExpansionType : public Type, public llvm::FoldingSetNode { |
5432 | friend class ASTContext; // ASTContext creates these |
5433 | |
5434 | /// The pattern of the pack expansion. |
5435 | QualType Pattern; |
5436 | |
5437 | PackExpansionType(QualType Pattern, QualType Canon, |
5438 | Optional<unsigned> NumExpansions) |
5439 | : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(), |
5440 | /*InstantiationDependent=*/true, |
5441 | /*VariablyModified=*/Pattern->isVariablyModifiedType(), |
5442 | /*ContainsUnexpandedParameterPack=*/false), |
5443 | Pattern(Pattern) { |
5444 | PackExpansionTypeBits.NumExpansions = |
5445 | NumExpansions ? *NumExpansions + 1 : 0; |
5446 | } |
5447 | |
5448 | public: |
5449 | /// Retrieve the pattern of this pack expansion, which is the |
5450 | /// type that will be repeatedly instantiated when instantiating the |
5451 | /// pack expansion itself. |
5452 | QualType getPattern() const { return Pattern; } |
5453 | |
5454 | /// Retrieve the number of expansions that this pack expansion will |
5455 | /// generate, if known. |
5456 | Optional<unsigned> getNumExpansions() const { |
5457 | if (PackExpansionTypeBits.NumExpansions) |
5458 | return PackExpansionTypeBits.NumExpansions - 1; |
5459 | return None; |
5460 | } |
5461 | |
5462 | bool isSugared() const { return !Pattern->isDependentType(); } |
5463 | QualType desugar() const { return isSugared() ? Pattern : QualType(this, 0); } |
5464 | |
5465 | void Profile(llvm::FoldingSetNodeID &ID) { |
5466 | Profile(ID, getPattern(), getNumExpansions()); |
5467 | } |
5468 | |
5469 | static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern, |
5470 | Optional<unsigned> NumExpansions) { |
5471 | ID.AddPointer(Pattern.getAsOpaquePtr()); |
5472 | ID.AddBoolean(NumExpansions.hasValue()); |
5473 | if (NumExpansions) |
5474 | ID.AddInteger(*NumExpansions); |
5475 | } |
5476 | |
5477 | static bool classof(const Type *T) { |
5478 | return T->getTypeClass() == PackExpansion; |
5479 | } |
5480 | }; |
5481 | |
5482 | /// This class wraps the list of protocol qualifiers. For types that can |
5483 | /// take ObjC protocol qualifers, they can subclass this class. |
5484 | template <class T> |
5485 | class ObjCProtocolQualifiers { |
5486 | protected: |
5487 | ObjCProtocolQualifiers() = default; |
5488 | |
5489 | ObjCProtocolDecl * const *getProtocolStorage() const { |
5490 | return const_cast<ObjCProtocolQualifiers*>(this)->getProtocolStorage(); |
5491 | } |
5492 | |
5493 | ObjCProtocolDecl **getProtocolStorage() { |
5494 | return static_cast<T*>(this)->getProtocolStorageImpl(); |
5495 | } |
5496 | |
5497 | void setNumProtocols(unsigned N) { |
5498 | static_cast<T*>(this)->setNumProtocolsImpl(N); |
5499 | } |
5500 | |
5501 | void initialize(ArrayRef<ObjCProtocolDecl *> protocols) { |
5502 | setNumProtocols(protocols.size()); |
5503 | assert(getNumProtocols() == protocols.size() &&((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count" ) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5504, __PRETTY_FUNCTION__)) |
5504 | "bitfield overflow in protocol count")((getNumProtocols() == protocols.size() && "bitfield overflow in protocol count" ) ? static_cast<void> (0) : __assert_fail ("getNumProtocols() == protocols.size() && \"bitfield overflow in protocol count\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5504, __PRETTY_FUNCTION__)); |
5505 | if (!protocols.empty()) |
5506 | memcpy(getProtocolStorage(), protocols.data(), |
5507 | protocols.size() * sizeof(ObjCProtocolDecl*)); |
5508 | } |
5509 | |
5510 | public: |
5511 | using qual_iterator = ObjCProtocolDecl * const *; |
5512 | using qual_range = llvm::iterator_range<qual_iterator>; |
5513 | |
5514 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
5515 | qual_iterator qual_begin() const { return getProtocolStorage(); } |
5516 | qual_iterator qual_end() const { return qual_begin() + getNumProtocols(); } |
5517 | |
5518 | bool qual_empty() const { return getNumProtocols() == 0; } |
5519 | |
5520 | /// Return the number of qualifying protocols in this type, or 0 if |
5521 | /// there are none. |
5522 | unsigned getNumProtocols() const { |
5523 | return static_cast<const T*>(this)->getNumProtocolsImpl(); |
5524 | } |
5525 | |
5526 | /// Fetch a protocol by index. |
5527 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
5528 | assert(I < getNumProtocols() && "Out-of-range protocol access")((I < getNumProtocols() && "Out-of-range protocol access" ) ? static_cast<void> (0) : __assert_fail ("I < getNumProtocols() && \"Out-of-range protocol access\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5528, __PRETTY_FUNCTION__)); |
5529 | return qual_begin()[I]; |
5530 | } |
5531 | |
5532 | /// Retrieve all of the protocol qualifiers. |
5533 | ArrayRef<ObjCProtocolDecl *> getProtocols() const { |
5534 | return ArrayRef<ObjCProtocolDecl *>(qual_begin(), getNumProtocols()); |
5535 | } |
5536 | }; |
5537 | |
5538 | /// Represents a type parameter type in Objective C. It can take |
5539 | /// a list of protocols. |
5540 | class ObjCTypeParamType : public Type, |
5541 | public ObjCProtocolQualifiers<ObjCTypeParamType>, |
5542 | public llvm::FoldingSetNode { |
5543 | friend class ASTContext; |
5544 | friend class ObjCProtocolQualifiers<ObjCTypeParamType>; |
5545 | |
5546 | /// The number of protocols stored on this type. |
5547 | unsigned NumProtocols : 6; |
5548 | |
5549 | ObjCTypeParamDecl *OTPDecl; |
5550 | |
5551 | /// The protocols are stored after the ObjCTypeParamType node. In the |
5552 | /// canonical type, the list of protocols are sorted alphabetically |
5553 | /// and uniqued. |
5554 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5555 | |
5556 | /// Return the number of qualifying protocols in this interface type, |
5557 | /// or 0 if there are none. |
5558 | unsigned getNumProtocolsImpl() const { |
5559 | return NumProtocols; |
5560 | } |
5561 | |
5562 | void setNumProtocolsImpl(unsigned N) { |
5563 | NumProtocols = N; |
5564 | } |
5565 | |
5566 | ObjCTypeParamType(const ObjCTypeParamDecl *D, |
5567 | QualType can, |
5568 | ArrayRef<ObjCProtocolDecl *> protocols); |
5569 | |
5570 | public: |
5571 | bool isSugared() const { return true; } |
5572 | QualType desugar() const { return getCanonicalTypeInternal(); } |
5573 | |
5574 | static bool classof(const Type *T) { |
5575 | return T->getTypeClass() == ObjCTypeParam; |
5576 | } |
5577 | |
5578 | void Profile(llvm::FoldingSetNodeID &ID); |
5579 | static void Profile(llvm::FoldingSetNodeID &ID, |
5580 | const ObjCTypeParamDecl *OTPDecl, |
5581 | ArrayRef<ObjCProtocolDecl *> protocols); |
5582 | |
5583 | ObjCTypeParamDecl *getDecl() const { return OTPDecl; } |
5584 | }; |
5585 | |
5586 | /// Represents a class type in Objective C. |
5587 | /// |
5588 | /// Every Objective C type is a combination of a base type, a set of |
5589 | /// type arguments (optional, for parameterized classes) and a list of |
5590 | /// protocols. |
5591 | /// |
5592 | /// Given the following declarations: |
5593 | /// \code |
5594 | /// \@class C<T>; |
5595 | /// \@protocol P; |
5596 | /// \endcode |
5597 | /// |
5598 | /// 'C' is an ObjCInterfaceType C. It is sugar for an ObjCObjectType |
5599 | /// with base C and no protocols. |
5600 | /// |
5601 | /// 'C<P>' is an unspecialized ObjCObjectType with base C and protocol list [P]. |
5602 | /// 'C<C*>' is a specialized ObjCObjectType with type arguments 'C*' and no |
5603 | /// protocol list. |
5604 | /// 'C<C*><P>' is a specialized ObjCObjectType with base C, type arguments 'C*', |
5605 | /// and protocol list [P]. |
5606 | /// |
5607 | /// 'id' is a TypedefType which is sugar for an ObjCObjectPointerType whose |
5608 | /// pointee is an ObjCObjectType with base BuiltinType::ObjCIdType |
5609 | /// and no protocols. |
5610 | /// |
5611 | /// 'id<P>' is an ObjCObjectPointerType whose pointee is an ObjCObjectType |
5612 | /// with base BuiltinType::ObjCIdType and protocol list [P]. Eventually |
5613 | /// this should get its own sugar class to better represent the source. |
5614 | class ObjCObjectType : public Type, |
5615 | public ObjCProtocolQualifiers<ObjCObjectType> { |
5616 | friend class ObjCProtocolQualifiers<ObjCObjectType>; |
5617 | |
5618 | // ObjCObjectType.NumTypeArgs - the number of type arguments stored |
5619 | // after the ObjCObjectPointerType node. |
5620 | // ObjCObjectType.NumProtocols - the number of protocols stored |
5621 | // after the type arguments of ObjCObjectPointerType node. |
5622 | // |
5623 | // These protocols are those written directly on the type. If |
5624 | // protocol qualifiers ever become additive, the iterators will need |
5625 | // to get kindof complicated. |
5626 | // |
5627 | // In the canonical object type, these are sorted alphabetically |
5628 | // and uniqued. |
5629 | |
5630 | /// Either a BuiltinType or an InterfaceType or sugar for either. |
5631 | QualType BaseType; |
5632 | |
5633 | /// Cached superclass type. |
5634 | mutable llvm::PointerIntPair<const ObjCObjectType *, 1, bool> |
5635 | CachedSuperClassType; |
5636 | |
5637 | QualType *getTypeArgStorage(); |
5638 | const QualType *getTypeArgStorage() const { |
5639 | return const_cast<ObjCObjectType *>(this)->getTypeArgStorage(); |
5640 | } |
5641 | |
5642 | ObjCProtocolDecl **getProtocolStorageImpl(); |
5643 | /// Return the number of qualifying protocols in this interface type, |
5644 | /// or 0 if there are none. |
5645 | unsigned getNumProtocolsImpl() const { |
5646 | return ObjCObjectTypeBits.NumProtocols; |
5647 | } |
5648 | void setNumProtocolsImpl(unsigned N) { |
5649 | ObjCObjectTypeBits.NumProtocols = N; |
5650 | } |
5651 | |
5652 | protected: |
5653 | enum Nonce_ObjCInterface { Nonce_ObjCInterface }; |
5654 | |
5655 | ObjCObjectType(QualType Canonical, QualType Base, |
5656 | ArrayRef<QualType> typeArgs, |
5657 | ArrayRef<ObjCProtocolDecl *> protocols, |
5658 | bool isKindOf); |
5659 | |
5660 | ObjCObjectType(enum Nonce_ObjCInterface) |
5661 | : Type(ObjCInterface, QualType(), false, false, false, false), |
5662 | BaseType(QualType(this_(), 0)) { |
5663 | ObjCObjectTypeBits.NumProtocols = 0; |
5664 | ObjCObjectTypeBits.NumTypeArgs = 0; |
5665 | ObjCObjectTypeBits.IsKindOf = 0; |
5666 | } |
5667 | |
5668 | void computeSuperClassTypeSlow() const; |
5669 | |
5670 | public: |
5671 | /// Gets the base type of this object type. This is always (possibly |
5672 | /// sugar for) one of: |
5673 | /// - the 'id' builtin type (as opposed to the 'id' type visible to the |
5674 | /// user, which is a typedef for an ObjCObjectPointerType) |
5675 | /// - the 'Class' builtin type (same caveat) |
5676 | /// - an ObjCObjectType (currently always an ObjCInterfaceType) |
5677 | QualType getBaseType() const { return BaseType; } |
5678 | |
5679 | bool isObjCId() const { |
5680 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCId); |
5681 | } |
5682 | |
5683 | bool isObjCClass() const { |
5684 | return getBaseType()->isSpecificBuiltinType(BuiltinType::ObjCClass); |
5685 | } |
5686 | |
5687 | bool isObjCUnqualifiedId() const { return qual_empty() && isObjCId(); } |
5688 | bool isObjCUnqualifiedClass() const { return qual_empty() && isObjCClass(); } |
5689 | bool isObjCUnqualifiedIdOrClass() const { |
5690 | if (!qual_empty()) return false; |
5691 | if (const BuiltinType *T = getBaseType()->getAs<BuiltinType>()) |
5692 | return T->getKind() == BuiltinType::ObjCId || |
5693 | T->getKind() == BuiltinType::ObjCClass; |
5694 | return false; |
5695 | } |
5696 | bool isObjCQualifiedId() const { return !qual_empty() && isObjCId(); } |
5697 | bool isObjCQualifiedClass() const { return !qual_empty() && isObjCClass(); } |
5698 | |
5699 | /// Gets the interface declaration for this object type, if the base type |
5700 | /// really is an interface. |
5701 | ObjCInterfaceDecl *getInterface() const; |
5702 | |
5703 | /// Determine whether this object type is "specialized", meaning |
5704 | /// that it has type arguments. |
5705 | bool isSpecialized() const; |
5706 | |
5707 | /// Determine whether this object type was written with type arguments. |
5708 | bool isSpecializedAsWritten() const { |
5709 | return ObjCObjectTypeBits.NumTypeArgs > 0; |
5710 | } |
5711 | |
5712 | /// Determine whether this object type is "unspecialized", meaning |
5713 | /// that it has no type arguments. |
5714 | bool isUnspecialized() const { return !isSpecialized(); } |
5715 | |
5716 | /// Determine whether this object type is "unspecialized" as |
5717 | /// written, meaning that it has no type arguments. |
5718 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
5719 | |
5720 | /// Retrieve the type arguments of this object type (semantically). |
5721 | ArrayRef<QualType> getTypeArgs() const; |
5722 | |
5723 | /// Retrieve the type arguments of this object type as they were |
5724 | /// written. |
5725 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
5726 | return llvm::makeArrayRef(getTypeArgStorage(), |
5727 | ObjCObjectTypeBits.NumTypeArgs); |
5728 | } |
5729 | |
5730 | /// Whether this is a "__kindof" type as written. |
5731 | bool isKindOfTypeAsWritten() const { return ObjCObjectTypeBits.IsKindOf; } |
5732 | |
5733 | /// Whether this ia a "__kindof" type (semantically). |
5734 | bool isKindOfType() const; |
5735 | |
5736 | /// Retrieve the type of the superclass of this object type. |
5737 | /// |
5738 | /// This operation substitutes any type arguments into the |
5739 | /// superclass of the current class type, potentially producing a |
5740 | /// specialization of the superclass type. Produces a null type if |
5741 | /// there is no superclass. |
5742 | QualType getSuperClassType() const { |
5743 | if (!CachedSuperClassType.getInt()) |
5744 | computeSuperClassTypeSlow(); |
5745 | |
5746 | assert(CachedSuperClassType.getInt() && "Superclass not set?")((CachedSuperClassType.getInt() && "Superclass not set?" ) ? static_cast<void> (0) : __assert_fail ("CachedSuperClassType.getInt() && \"Superclass not set?\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 5746, __PRETTY_FUNCTION__)); |
5747 | return QualType(CachedSuperClassType.getPointer(), 0); |
5748 | } |
5749 | |
5750 | /// Strip off the Objective-C "kindof" type and (with it) any |
5751 | /// protocol qualifiers. |
5752 | QualType stripObjCKindOfTypeAndQuals(const ASTContext &ctx) const; |
5753 | |
5754 | bool isSugared() const { return false; } |
5755 | QualType desugar() const { return QualType(this, 0); } |
5756 | |
5757 | static bool classof(const Type *T) { |
5758 | return T->getTypeClass() == ObjCObject || |
5759 | T->getTypeClass() == ObjCInterface; |
5760 | } |
5761 | }; |
5762 | |
5763 | /// A class providing a concrete implementation |
5764 | /// of ObjCObjectType, so as to not increase the footprint of |
5765 | /// ObjCInterfaceType. Code outside of ASTContext and the core type |
5766 | /// system should not reference this type. |
5767 | class ObjCObjectTypeImpl : public ObjCObjectType, public llvm::FoldingSetNode { |
5768 | friend class ASTContext; |
5769 | |
5770 | // If anyone adds fields here, ObjCObjectType::getProtocolStorage() |
5771 | // will need to be modified. |
5772 | |
5773 | ObjCObjectTypeImpl(QualType Canonical, QualType Base, |
5774 | ArrayRef<QualType> typeArgs, |
5775 | ArrayRef<ObjCProtocolDecl *> protocols, |
5776 | bool isKindOf) |
5777 | : ObjCObjectType(Canonical, Base, typeArgs, protocols, isKindOf) {} |
5778 | |
5779 | public: |
5780 | void Profile(llvm::FoldingSetNodeID &ID); |
5781 | static void Profile(llvm::FoldingSetNodeID &ID, |
5782 | QualType Base, |
5783 | ArrayRef<QualType> typeArgs, |
5784 | ArrayRef<ObjCProtocolDecl *> protocols, |
5785 | bool isKindOf); |
5786 | }; |
5787 | |
5788 | inline QualType *ObjCObjectType::getTypeArgStorage() { |
5789 | return reinterpret_cast<QualType *>(static_cast<ObjCObjectTypeImpl*>(this)+1); |
5790 | } |
5791 | |
5792 | inline ObjCProtocolDecl **ObjCObjectType::getProtocolStorageImpl() { |
5793 | return reinterpret_cast<ObjCProtocolDecl**>( |
5794 | getTypeArgStorage() + ObjCObjectTypeBits.NumTypeArgs); |
5795 | } |
5796 | |
5797 | inline ObjCProtocolDecl **ObjCTypeParamType::getProtocolStorageImpl() { |
5798 | return reinterpret_cast<ObjCProtocolDecl**>( |
5799 | static_cast<ObjCTypeParamType*>(this)+1); |
5800 | } |
5801 | |
5802 | /// Interfaces are the core concept in Objective-C for object oriented design. |
5803 | /// They basically correspond to C++ classes. There are two kinds of interface |
5804 | /// types: normal interfaces like `NSString`, and qualified interfaces, which |
5805 | /// are qualified with a protocol list like `NSString<NSCopyable, NSAmazing>`. |
5806 | /// |
5807 | /// ObjCInterfaceType guarantees the following properties when considered |
5808 | /// as a subtype of its superclass, ObjCObjectType: |
5809 | /// - There are no protocol qualifiers. To reinforce this, code which |
5810 | /// tries to invoke the protocol methods via an ObjCInterfaceType will |
5811 | /// fail to compile. |
5812 | /// - It is its own base type. That is, if T is an ObjCInterfaceType*, |
5813 | /// T->getBaseType() == QualType(T, 0). |
5814 | class ObjCInterfaceType : public ObjCObjectType { |
5815 | friend class ASTContext; // ASTContext creates these. |
5816 | friend class ASTReader; |
5817 | friend class ObjCInterfaceDecl; |
5818 | |
5819 | mutable ObjCInterfaceDecl *Decl; |
5820 | |
5821 | ObjCInterfaceType(const ObjCInterfaceDecl *D) |
5822 | : ObjCObjectType(Nonce_ObjCInterface), |
5823 | Decl(const_cast<ObjCInterfaceDecl*>(D)) {} |
5824 | |
5825 | public: |
5826 | /// Get the declaration of this interface. |
5827 | ObjCInterfaceDecl *getDecl() const { return Decl; } |
5828 | |
5829 | bool isSugared() const { return false; } |
5830 | QualType desugar() const { return QualType(this, 0); } |
5831 | |
5832 | static bool classof(const Type *T) { |
5833 | return T->getTypeClass() == ObjCInterface; |
5834 | } |
5835 | |
5836 | // Nonsense to "hide" certain members of ObjCObjectType within this |
5837 | // class. People asking for protocols on an ObjCInterfaceType are |
5838 | // not going to get what they want: ObjCInterfaceTypes are |
5839 | // guaranteed to have no protocols. |
5840 | enum { |
5841 | qual_iterator, |
5842 | qual_begin, |
5843 | qual_end, |
5844 | getNumProtocols, |
5845 | getProtocol |
5846 | }; |
5847 | }; |
5848 | |
5849 | inline ObjCInterfaceDecl *ObjCObjectType::getInterface() const { |
5850 | QualType baseType = getBaseType(); |
5851 | while (const auto *ObjT = baseType->getAs<ObjCObjectType>()) { |
5852 | if (const auto *T = dyn_cast<ObjCInterfaceType>(ObjT)) |
5853 | return T->getDecl(); |
5854 | |
5855 | baseType = ObjT->getBaseType(); |
5856 | } |
5857 | |
5858 | return nullptr; |
5859 | } |
5860 | |
5861 | /// Represents a pointer to an Objective C object. |
5862 | /// |
5863 | /// These are constructed from pointer declarators when the pointee type is |
5864 | /// an ObjCObjectType (or sugar for one). In addition, the 'id' and 'Class' |
5865 | /// types are typedefs for these, and the protocol-qualified types 'id<P>' |
5866 | /// and 'Class<P>' are translated into these. |
5867 | /// |
5868 | /// Pointers to pointers to Objective C objects are still PointerTypes; |
5869 | /// only the first level of pointer gets it own type implementation. |
5870 | class ObjCObjectPointerType : public Type, public llvm::FoldingSetNode { |
5871 | friend class ASTContext; // ASTContext creates these. |
5872 | |
5873 | QualType PointeeType; |
5874 | |
5875 | ObjCObjectPointerType(QualType Canonical, QualType Pointee) |
5876 | : Type(ObjCObjectPointer, Canonical, |
5877 | Pointee->isDependentType(), |
5878 | Pointee->isInstantiationDependentType(), |
5879 | Pointee->isVariablyModifiedType(), |
5880 | Pointee->containsUnexpandedParameterPack()), |
5881 | PointeeType(Pointee) {} |
5882 | |
5883 | public: |
5884 | /// Gets the type pointed to by this ObjC pointer. |
5885 | /// The result will always be an ObjCObjectType or sugar thereof. |
5886 | QualType getPointeeType() const { return PointeeType; } |
5887 | |
5888 | /// Gets the type pointed to by this ObjC pointer. Always returns non-null. |
5889 | /// |
5890 | /// This method is equivalent to getPointeeType() except that |
5891 | /// it discards any typedefs (or other sugar) between this |
5892 | /// type and the "outermost" object type. So for: |
5893 | /// \code |
5894 | /// \@class A; \@protocol P; \@protocol Q; |
5895 | /// typedef A<P> AP; |
5896 | /// typedef A A1; |
5897 | /// typedef A1<P> A1P; |
5898 | /// typedef A1P<Q> A1PQ; |
5899 | /// \endcode |
5900 | /// For 'A*', getObjectType() will return 'A'. |
5901 | /// For 'A<P>*', getObjectType() will return 'A<P>'. |
5902 | /// For 'AP*', getObjectType() will return 'A<P>'. |
5903 | /// For 'A1*', getObjectType() will return 'A'. |
5904 | /// For 'A1<P>*', getObjectType() will return 'A1<P>'. |
5905 | /// For 'A1P*', getObjectType() will return 'A1<P>'. |
5906 | /// For 'A1PQ*', getObjectType() will return 'A1<Q>', because |
5907 | /// adding protocols to a protocol-qualified base discards the |
5908 | /// old qualifiers (for now). But if it didn't, getObjectType() |
5909 | /// would return 'A1P<Q>' (and we'd have to make iterating over |
5910 | /// qualifiers more complicated). |
5911 | const ObjCObjectType *getObjectType() const { |
5912 | return PointeeType->castAs<ObjCObjectType>(); |
5913 | } |
5914 | |
5915 | /// If this pointer points to an Objective C |
5916 | /// \@interface type, gets the type for that interface. Any protocol |
5917 | /// qualifiers on the interface are ignored. |
5918 | /// |
5919 | /// \return null if the base type for this pointer is 'id' or 'Class' |
5920 | const ObjCInterfaceType *getInterfaceType() const; |
5921 | |
5922 | /// If this pointer points to an Objective \@interface |
5923 | /// type, gets the declaration for that interface. |
5924 | /// |
5925 | /// \return null if the base type for this pointer is 'id' or 'Class' |
5926 | ObjCInterfaceDecl *getInterfaceDecl() const { |
5927 | return getObjectType()->getInterface(); |
5928 | } |
5929 | |
5930 | /// True if this is equivalent to the 'id' type, i.e. if |
5931 | /// its object type is the primitive 'id' type with no protocols. |
5932 | bool isObjCIdType() const { |
5933 | return getObjectType()->isObjCUnqualifiedId(); |
5934 | } |
5935 | |
5936 | /// True if this is equivalent to the 'Class' type, |
5937 | /// i.e. if its object tive is the primitive 'Class' type with no protocols. |
5938 | bool isObjCClassType() const { |
5939 | return getObjectType()->isObjCUnqualifiedClass(); |
5940 | } |
5941 | |
5942 | /// True if this is equivalent to the 'id' or 'Class' type, |
5943 | bool isObjCIdOrClassType() const { |
5944 | return getObjectType()->isObjCUnqualifiedIdOrClass(); |
5945 | } |
5946 | |
5947 | /// True if this is equivalent to 'id<P>' for some non-empty set of |
5948 | /// protocols. |
5949 | bool isObjCQualifiedIdType() const { |
5950 | return getObjectType()->isObjCQualifiedId(); |
5951 | } |
5952 | |
5953 | /// True if this is equivalent to 'Class<P>' for some non-empty set of |
5954 | /// protocols. |
5955 | bool isObjCQualifiedClassType() const { |
5956 | return getObjectType()->isObjCQualifiedClass(); |
5957 | } |
5958 | |
5959 | /// Whether this is a "__kindof" type. |
5960 | bool isKindOfType() const { return getObjectType()->isKindOfType(); } |
5961 | |
5962 | /// Whether this type is specialized, meaning that it has type arguments. |
5963 | bool isSpecialized() const { return getObjectType()->isSpecialized(); } |
5964 | |
5965 | /// Whether this type is specialized, meaning that it has type arguments. |
5966 | bool isSpecializedAsWritten() const { |
5967 | return getObjectType()->isSpecializedAsWritten(); |
5968 | } |
5969 | |
5970 | /// Whether this type is unspecialized, meaning that is has no type arguments. |
5971 | bool isUnspecialized() const { return getObjectType()->isUnspecialized(); } |
5972 | |
5973 | /// Determine whether this object type is "unspecialized" as |
5974 | /// written, meaning that it has no type arguments. |
5975 | bool isUnspecializedAsWritten() const { return !isSpecializedAsWritten(); } |
5976 | |
5977 | /// Retrieve the type arguments for this type. |
5978 | ArrayRef<QualType> getTypeArgs() const { |
5979 | return getObjectType()->getTypeArgs(); |
5980 | } |
5981 | |
5982 | /// Retrieve the type arguments for this type. |
5983 | ArrayRef<QualType> getTypeArgsAsWritten() const { |
5984 | return getObjectType()->getTypeArgsAsWritten(); |
5985 | } |
5986 | |
5987 | /// An iterator over the qualifiers on the object type. Provided |
5988 | /// for convenience. This will always iterate over the full set of |
5989 | /// protocols on a type, not just those provided directly. |
5990 | using qual_iterator = ObjCObjectType::qual_iterator; |
5991 | using qual_range = llvm::iterator_range<qual_iterator>; |
5992 | |
5993 | qual_range quals() const { return qual_range(qual_begin(), qual_end()); } |
5994 | |
5995 | qual_iterator qual_begin() const { |
5996 | return getObjectType()->qual_begin(); |
5997 | } |
5998 | |
5999 | qual_iterator qual_end() const { |
6000 | return getObjectType()->qual_end(); |
6001 | } |
6002 | |
6003 | bool qual_empty() const { return getObjectType()->qual_empty(); } |
6004 | |
6005 | /// Return the number of qualifying protocols on the object type. |
6006 | unsigned getNumProtocols() const { |
6007 | return getObjectType()->getNumProtocols(); |
6008 | } |
6009 | |
6010 | /// Retrieve a qualifying protocol by index on the object type. |
6011 | ObjCProtocolDecl *getProtocol(unsigned I) const { |
6012 | return getObjectType()->getProtocol(I); |
6013 | } |
6014 | |
6015 | bool isSugared() const { return false; } |
6016 | QualType desugar() const { return QualType(this, 0); } |
6017 | |
6018 | /// Retrieve the type of the superclass of this object pointer type. |
6019 | /// |
6020 | /// This operation substitutes any type arguments into the |
6021 | /// superclass of the current class type, potentially producing a |
6022 | /// pointer to a specialization of the superclass type. Produces a |
6023 | /// null type if there is no superclass. |
6024 | QualType getSuperClassType() const; |
6025 | |
6026 | /// Strip off the Objective-C "kindof" type and (with it) any |
6027 | /// protocol qualifiers. |
6028 | const ObjCObjectPointerType *stripObjCKindOfTypeAndQuals( |
6029 | const ASTContext &ctx) const; |
6030 | |
6031 | void Profile(llvm::FoldingSetNodeID &ID) { |
6032 | Profile(ID, getPointeeType()); |
6033 | } |
6034 | |
6035 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6036 | ID.AddPointer(T.getAsOpaquePtr()); |
6037 | } |
6038 | |
6039 | static bool classof(const Type *T) { |
6040 | return T->getTypeClass() == ObjCObjectPointer; |
6041 | } |
6042 | }; |
6043 | |
6044 | class AtomicType : public Type, public llvm::FoldingSetNode { |
6045 | friend class ASTContext; // ASTContext creates these. |
6046 | |
6047 | QualType ValueType; |
6048 | |
6049 | AtomicType(QualType ValTy, QualType Canonical) |
6050 | : Type(Atomic, Canonical, ValTy->isDependentType(), |
6051 | ValTy->isInstantiationDependentType(), |
6052 | ValTy->isVariablyModifiedType(), |
6053 | ValTy->containsUnexpandedParameterPack()), |
6054 | ValueType(ValTy) {} |
6055 | |
6056 | public: |
6057 | /// Gets the type contained by this atomic type, i.e. |
6058 | /// the type returned by performing an atomic load of this atomic type. |
6059 | QualType getValueType() const { return ValueType; } |
6060 | |
6061 | bool isSugared() const { return false; } |
6062 | QualType desugar() const { return QualType(this, 0); } |
6063 | |
6064 | void Profile(llvm::FoldingSetNodeID &ID) { |
6065 | Profile(ID, getValueType()); |
6066 | } |
6067 | |
6068 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T) { |
6069 | ID.AddPointer(T.getAsOpaquePtr()); |
6070 | } |
6071 | |
6072 | static bool classof(const Type *T) { |
6073 | return T->getTypeClass() == Atomic; |
6074 | } |
6075 | }; |
6076 | |
6077 | /// PipeType - OpenCL20. |
6078 | class PipeType : public Type, public llvm::FoldingSetNode { |
6079 | friend class ASTContext; // ASTContext creates these. |
6080 | |
6081 | QualType ElementType; |
6082 | bool isRead; |
6083 | |
6084 | PipeType(QualType elemType, QualType CanonicalPtr, bool isRead) |
6085 | : Type(Pipe, CanonicalPtr, elemType->isDependentType(), |
6086 | elemType->isInstantiationDependentType(), |
6087 | elemType->isVariablyModifiedType(), |
6088 | elemType->containsUnexpandedParameterPack()), |
6089 | ElementType(elemType), isRead(isRead) {} |
6090 | |
6091 | public: |
6092 | QualType getElementType() const { return ElementType; } |
6093 | |
6094 | bool isSugared() const { return false; } |
6095 | |
6096 | QualType desugar() const { return QualType(this, 0); } |
6097 | |
6098 | void Profile(llvm::FoldingSetNodeID &ID) { |
6099 | Profile(ID, getElementType(), isReadOnly()); |
6100 | } |
6101 | |
6102 | static void Profile(llvm::FoldingSetNodeID &ID, QualType T, bool isRead) { |
6103 | ID.AddPointer(T.getAsOpaquePtr()); |
6104 | ID.AddBoolean(isRead); |
6105 | } |
6106 | |
6107 | static bool classof(const Type *T) { |
6108 | return T->getTypeClass() == Pipe; |
6109 | } |
6110 | |
6111 | bool isReadOnly() const { return isRead; } |
6112 | }; |
6113 | |
6114 | /// A qualifier set is used to build a set of qualifiers. |
6115 | class QualifierCollector : public Qualifiers { |
6116 | public: |
6117 | QualifierCollector(Qualifiers Qs = Qualifiers()) : Qualifiers(Qs) {} |
6118 | |
6119 | /// Collect any qualifiers on the given type and return an |
6120 | /// unqualified type. The qualifiers are assumed to be consistent |
6121 | /// with those already in the type. |
6122 | const Type *strip(QualType type) { |
6123 | addFastQualifiers(type.getLocalFastQualifiers()); |
6124 | if (!type.hasLocalNonFastQualifiers()) |
6125 | return type.getTypePtrUnsafe(); |
6126 | |
6127 | const ExtQuals *extQuals = type.getExtQualsUnsafe(); |
6128 | addConsistentQualifiers(extQuals->getQualifiers()); |
6129 | return extQuals->getBaseType(); |
6130 | } |
6131 | |
6132 | /// Apply the collected qualifiers to the given type. |
6133 | QualType apply(const ASTContext &Context, QualType QT) const; |
6134 | |
6135 | /// Apply the collected qualifiers to the given type. |
6136 | QualType apply(const ASTContext &Context, const Type* T) const; |
6137 | }; |
6138 | |
6139 | // Inline function definitions. |
6140 | |
6141 | inline SplitQualType SplitQualType::getSingleStepDesugaredType() const { |
6142 | SplitQualType desugar = |
6143 | Ty->getLocallyUnqualifiedSingleStepDesugaredType().split(); |
6144 | desugar.Quals.addConsistentQualifiers(Quals); |
6145 | return desugar; |
6146 | } |
6147 | |
6148 | inline const Type *QualType::getTypePtr() const { |
6149 | return getCommonPtr()->BaseType; |
6150 | } |
6151 | |
6152 | inline const Type *QualType::getTypePtrOrNull() const { |
6153 | return (isNull() ? nullptr : getCommonPtr()->BaseType); |
6154 | } |
6155 | |
6156 | inline SplitQualType QualType::split() const { |
6157 | if (!hasLocalNonFastQualifiers()) |
6158 | return SplitQualType(getTypePtrUnsafe(), |
6159 | Qualifiers::fromFastMask(getLocalFastQualifiers())); |
6160 | |
6161 | const ExtQuals *eq = getExtQualsUnsafe(); |
6162 | Qualifiers qs = eq->getQualifiers(); |
6163 | qs.addFastQualifiers(getLocalFastQualifiers()); |
6164 | return SplitQualType(eq->getBaseType(), qs); |
6165 | } |
6166 | |
6167 | inline Qualifiers QualType::getLocalQualifiers() const { |
6168 | Qualifiers Quals; |
6169 | if (hasLocalNonFastQualifiers()) |
6170 | Quals = getExtQualsUnsafe()->getQualifiers(); |
6171 | Quals.addFastQualifiers(getLocalFastQualifiers()); |
6172 | return Quals; |
6173 | } |
6174 | |
6175 | inline Qualifiers QualType::getQualifiers() const { |
6176 | Qualifiers quals = getCommonPtr()->CanonicalType.getLocalQualifiers(); |
6177 | quals.addFastQualifiers(getLocalFastQualifiers()); |
6178 | return quals; |
6179 | } |
6180 | |
6181 | inline unsigned QualType::getCVRQualifiers() const { |
6182 | unsigned cvr = getCommonPtr()->CanonicalType.getLocalCVRQualifiers(); |
6183 | cvr |= getLocalCVRQualifiers(); |
6184 | return cvr; |
6185 | } |
6186 | |
6187 | inline QualType QualType::getCanonicalType() const { |
6188 | QualType canon = getCommonPtr()->CanonicalType; |
6189 | return canon.withFastQualifiers(getLocalFastQualifiers()); |
6190 | } |
6191 | |
6192 | inline bool QualType::isCanonical() const { |
6193 | return getTypePtr()->isCanonicalUnqualified(); |
6194 | } |
6195 | |
6196 | inline bool QualType::isCanonicalAsParam() const { |
6197 | if (!isCanonical()) return false; |
6198 | if (hasLocalQualifiers()) return false; |
6199 | |
6200 | const Type *T = getTypePtr(); |
6201 | if (T->isVariablyModifiedType() && T->hasSizedVLAType()) |
6202 | return false; |
6203 | |
6204 | return !isa<FunctionType>(T) && !isa<ArrayType>(T); |
6205 | } |
6206 | |
6207 | inline bool QualType::isConstQualified() const { |
6208 | return isLocalConstQualified() || |
6209 | getCommonPtr()->CanonicalType.isLocalConstQualified(); |
6210 | } |
6211 | |
6212 | inline bool QualType::isRestrictQualified() const { |
6213 | return isLocalRestrictQualified() || |
6214 | getCommonPtr()->CanonicalType.isLocalRestrictQualified(); |
6215 | } |
6216 | |
6217 | |
6218 | inline bool QualType::isVolatileQualified() const { |
6219 | return isLocalVolatileQualified() || |
6220 | getCommonPtr()->CanonicalType.isLocalVolatileQualified(); |
6221 | } |
6222 | |
6223 | inline bool QualType::hasQualifiers() const { |
6224 | return hasLocalQualifiers() || |
6225 | getCommonPtr()->CanonicalType.hasLocalQualifiers(); |
6226 | } |
6227 | |
6228 | inline QualType QualType::getUnqualifiedType() const { |
6229 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6230 | return QualType(getTypePtr(), 0); |
6231 | |
6232 | return QualType(getSplitUnqualifiedTypeImpl(*this).Ty, 0); |
6233 | } |
6234 | |
6235 | inline SplitQualType QualType::getSplitUnqualifiedType() const { |
6236 | if (!getTypePtr()->getCanonicalTypeInternal().hasLocalQualifiers()) |
6237 | return split(); |
6238 | |
6239 | return getSplitUnqualifiedTypeImpl(*this); |
6240 | } |
6241 | |
6242 | inline void QualType::removeLocalConst() { |
6243 | removeLocalFastQualifiers(Qualifiers::Const); |
6244 | } |
6245 | |
6246 | inline void QualType::removeLocalRestrict() { |
6247 | removeLocalFastQualifiers(Qualifiers::Restrict); |
6248 | } |
6249 | |
6250 | inline void QualType::removeLocalVolatile() { |
6251 | removeLocalFastQualifiers(Qualifiers::Volatile); |
6252 | } |
6253 | |
6254 | inline void QualType::removeLocalCVRQualifiers(unsigned Mask) { |
6255 | assert(!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits")((!(Mask & ~Qualifiers::CVRMask) && "mask has non-CVR bits" ) ? static_cast<void> (0) : __assert_fail ("!(Mask & ~Qualifiers::CVRMask) && \"mask has non-CVR bits\"" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6255, __PRETTY_FUNCTION__)); |
6256 | static_assert((int)Qualifiers::CVRMask == (int)Qualifiers::FastMask, |
6257 | "Fast bits differ from CVR bits!"); |
6258 | |
6259 | // Fast path: we don't need to touch the slow qualifiers. |
6260 | removeLocalFastQualifiers(Mask); |
6261 | } |
6262 | |
6263 | /// Return the address space of this type. |
6264 | inline LangAS QualType::getAddressSpace() const { |
6265 | return getQualifiers().getAddressSpace(); |
6266 | } |
6267 | |
6268 | /// Return the gc attribute of this type. |
6269 | inline Qualifiers::GC QualType::getObjCGCAttr() const { |
6270 | return getQualifiers().getObjCGCAttr(); |
6271 | } |
6272 | |
6273 | inline bool QualType::hasNonTrivialToPrimitiveDefaultInitializeCUnion() const { |
6274 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6275 | return hasNonTrivialToPrimitiveDefaultInitializeCUnion(RD); |
6276 | return false; |
6277 | } |
6278 | |
6279 | inline bool QualType::hasNonTrivialToPrimitiveDestructCUnion() const { |
6280 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6281 | return hasNonTrivialToPrimitiveDestructCUnion(RD); |
6282 | return false; |
6283 | } |
6284 | |
6285 | inline bool QualType::hasNonTrivialToPrimitiveCopyCUnion() const { |
6286 | if (auto *RD = getTypePtr()->getBaseElementTypeUnsafe()->getAsRecordDecl()) |
6287 | return hasNonTrivialToPrimitiveCopyCUnion(RD); |
6288 | return false; |
6289 | } |
6290 | |
6291 | inline FunctionType::ExtInfo getFunctionExtInfo(const Type &t) { |
6292 | if (const auto *PT = t.getAs<PointerType>()) { |
6293 | if (const auto *FT = PT->getPointeeType()->getAs<FunctionType>()) |
6294 | return FT->getExtInfo(); |
6295 | } else if (const auto *FT = t.getAs<FunctionType>()) |
6296 | return FT->getExtInfo(); |
6297 | |
6298 | return FunctionType::ExtInfo(); |
6299 | } |
6300 | |
6301 | inline FunctionType::ExtInfo getFunctionExtInfo(QualType t) { |
6302 | return getFunctionExtInfo(*t); |
6303 | } |
6304 | |
6305 | /// Determine whether this type is more |
6306 | /// qualified than the Other type. For example, "const volatile int" |
6307 | /// is more qualified than "const int", "volatile int", and |
6308 | /// "int". However, it is not more qualified than "const volatile |
6309 | /// int". |
6310 | inline bool QualType::isMoreQualifiedThan(QualType other) const { |
6311 | Qualifiers MyQuals = getQualifiers(); |
6312 | Qualifiers OtherQuals = other.getQualifiers(); |
6313 | return (MyQuals != OtherQuals && MyQuals.compatiblyIncludes(OtherQuals)); |
6314 | } |
6315 | |
6316 | /// Determine whether this type is at last |
6317 | /// as qualified as the Other type. For example, "const volatile |
6318 | /// int" is at least as qualified as "const int", "volatile int", |
6319 | /// "int", and "const volatile int". |
6320 | inline bool QualType::isAtLeastAsQualifiedAs(QualType other) const { |
6321 | Qualifiers OtherQuals = other.getQualifiers(); |
6322 | |
6323 | // Ignore __unaligned qualifier if this type is a void. |
6324 | if (getUnqualifiedType()->isVoidType()) |
6325 | OtherQuals.removeUnaligned(); |
6326 | |
6327 | return getQualifiers().compatiblyIncludes(OtherQuals); |
6328 | } |
6329 | |
6330 | /// If Type is a reference type (e.g., const |
6331 | /// int&), returns the type that the reference refers to ("const |
6332 | /// int"). Otherwise, returns the type itself. This routine is used |
6333 | /// throughout Sema to implement C++ 5p6: |
6334 | /// |
6335 | /// If an expression initially has the type "reference to T" (8.3.2, |
6336 | /// 8.5.3), the type is adjusted to "T" prior to any further |
6337 | /// analysis, the expression designates the object or function |
6338 | /// denoted by the reference, and the expression is an lvalue. |
6339 | inline QualType QualType::getNonReferenceType() const { |
6340 | if (const auto *RefType = (*this)->getAs<ReferenceType>()) |
6341 | return RefType->getPointeeType(); |
6342 | else |
6343 | return *this; |
6344 | } |
6345 | |
6346 | inline bool QualType::isCForbiddenLValueType() const { |
6347 | return ((getTypePtr()->isVoidType() && !hasQualifiers()) || |
6348 | getTypePtr()->isFunctionType()); |
6349 | } |
6350 | |
6351 | /// Tests whether the type is categorized as a fundamental type. |
6352 | /// |
6353 | /// \returns True for types specified in C++0x [basic.fundamental]. |
6354 | inline bool Type::isFundamentalType() const { |
6355 | return isVoidType() || |
6356 | isNullPtrType() || |
6357 | // FIXME: It's really annoying that we don't have an |
6358 | // 'isArithmeticType()' which agrees with the standard definition. |
6359 | (isArithmeticType() && !isEnumeralType()); |
6360 | } |
6361 | |
6362 | /// Tests whether the type is categorized as a compound type. |
6363 | /// |
6364 | /// \returns True for types specified in C++0x [basic.compound]. |
6365 | inline bool Type::isCompoundType() const { |
6366 | // C++0x [basic.compound]p1: |
6367 | // Compound types can be constructed in the following ways: |
6368 | // -- arrays of objects of a given type [...]; |
6369 | return isArrayType() || |
6370 | // -- functions, which have parameters of given types [...]; |
6371 | isFunctionType() || |
6372 | // -- pointers to void or objects or functions [...]; |
6373 | isPointerType() || |
6374 | // -- references to objects or functions of a given type. [...] |
6375 | isReferenceType() || |
6376 | // -- classes containing a sequence of objects of various types, [...]; |
6377 | isRecordType() || |
6378 | // -- unions, which are classes capable of containing objects of different |
6379 | // types at different times; |
6380 | isUnionType() || |
6381 | // -- enumerations, which comprise a set of named constant values. [...]; |
6382 | isEnumeralType() || |
6383 | // -- pointers to non-static class members, [...]. |
6384 | isMemberPointerType(); |
6385 | } |
6386 | |
6387 | inline bool Type::isFunctionType() const { |
6388 | return isa<FunctionType>(CanonicalType); |
6389 | } |
6390 | |
6391 | inline bool Type::isPointerType() const { |
6392 | return isa<PointerType>(CanonicalType); |
6393 | } |
6394 | |
6395 | inline bool Type::isAnyPointerType() const { |
6396 | return isPointerType() || isObjCObjectPointerType(); |
6397 | } |
6398 | |
6399 | inline bool Type::isBlockPointerType() const { |
6400 | return isa<BlockPointerType>(CanonicalType); |
6401 | } |
6402 | |
6403 | inline bool Type::isReferenceType() const { |
6404 | return isa<ReferenceType>(CanonicalType); |
6405 | } |
6406 | |
6407 | inline bool Type::isLValueReferenceType() const { |
6408 | return isa<LValueReferenceType>(CanonicalType); |
6409 | } |
6410 | |
6411 | inline bool Type::isRValueReferenceType() const { |
6412 | return isa<RValueReferenceType>(CanonicalType); |
6413 | } |
6414 | |
6415 | inline bool Type::isFunctionPointerType() const { |
6416 | if (const auto *T = getAs<PointerType>()) |
6417 | return T->getPointeeType()->isFunctionType(); |
6418 | else |
6419 | return false; |
6420 | } |
6421 | |
6422 | inline bool Type::isFunctionReferenceType() const { |
6423 | if (const auto *T = getAs<ReferenceType>()) |
6424 | return T->getPointeeType()->isFunctionType(); |
6425 | else |
6426 | return false; |
6427 | } |
6428 | |
6429 | inline bool Type::isMemberPointerType() const { |
6430 | return isa<MemberPointerType>(CanonicalType); |
6431 | } |
6432 | |
6433 | inline bool Type::isMemberFunctionPointerType() const { |
6434 | if (const auto *T = getAs<MemberPointerType>()) |
6435 | return T->isMemberFunctionPointer(); |
6436 | else |
6437 | return false; |
6438 | } |
6439 | |
6440 | inline bool Type::isMemberDataPointerType() const { |
6441 | if (const auto *T = getAs<MemberPointerType>()) |
6442 | return T->isMemberDataPointer(); |
6443 | else |
6444 | return false; |
6445 | } |
6446 | |
6447 | inline bool Type::isArrayType() const { |
6448 | return isa<ArrayType>(CanonicalType); |
6449 | } |
6450 | |
6451 | inline bool Type::isConstantArrayType() const { |
6452 | return isa<ConstantArrayType>(CanonicalType); |
6453 | } |
6454 | |
6455 | inline bool Type::isIncompleteArrayType() const { |
6456 | return isa<IncompleteArrayType>(CanonicalType); |
6457 | } |
6458 | |
6459 | inline bool Type::isVariableArrayType() const { |
6460 | return isa<VariableArrayType>(CanonicalType); |
6461 | } |
6462 | |
6463 | inline bool Type::isDependentSizedArrayType() const { |
6464 | return isa<DependentSizedArrayType>(CanonicalType); |
6465 | } |
6466 | |
6467 | inline bool Type::isBuiltinType() const { |
6468 | return isa<BuiltinType>(CanonicalType); |
6469 | } |
6470 | |
6471 | inline bool Type::isRecordType() const { |
6472 | return isa<RecordType>(CanonicalType); |
6473 | } |
6474 | |
6475 | inline bool Type::isEnumeralType() const { |
6476 | return isa<EnumType>(CanonicalType); |
6477 | } |
6478 | |
6479 | inline bool Type::isAnyComplexType() const { |
6480 | return isa<ComplexType>(CanonicalType); |
6481 | } |
6482 | |
6483 | inline bool Type::isVectorType() const { |
6484 | return isa<VectorType>(CanonicalType); |
6485 | } |
6486 | |
6487 | inline bool Type::isExtVectorType() const { |
6488 | return isa<ExtVectorType>(CanonicalType); |
6489 | } |
6490 | |
6491 | inline bool Type::isDependentAddressSpaceType() const { |
6492 | return isa<DependentAddressSpaceType>(CanonicalType); |
6493 | } |
6494 | |
6495 | inline bool Type::isObjCObjectPointerType() const { |
6496 | return isa<ObjCObjectPointerType>(CanonicalType); |
6497 | } |
6498 | |
6499 | inline bool Type::isObjCObjectType() const { |
6500 | return isa<ObjCObjectType>(CanonicalType); |
6501 | } |
6502 | |
6503 | inline bool Type::isObjCObjectOrInterfaceType() const { |
6504 | return isa<ObjCInterfaceType>(CanonicalType) || |
6505 | isa<ObjCObjectType>(CanonicalType); |
6506 | } |
6507 | |
6508 | inline bool Type::isAtomicType() const { |
6509 | return isa<AtomicType>(CanonicalType); |
6510 | } |
6511 | |
6512 | inline bool Type::isObjCQualifiedIdType() const { |
6513 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6514 | return OPT->isObjCQualifiedIdType(); |
6515 | return false; |
6516 | } |
6517 | |
6518 | inline bool Type::isObjCQualifiedClassType() const { |
6519 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6520 | return OPT->isObjCQualifiedClassType(); |
6521 | return false; |
6522 | } |
6523 | |
6524 | inline bool Type::isObjCIdType() const { |
6525 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6526 | return OPT->isObjCIdType(); |
6527 | return false; |
6528 | } |
6529 | |
6530 | inline bool Type::isObjCClassType() const { |
6531 | if (const auto *OPT = getAs<ObjCObjectPointerType>()) |
6532 | return OPT->isObjCClassType(); |
6533 | return false; |
6534 | } |
6535 | |
6536 | inline bool Type::isObjCSelType() const { |
6537 | if (const auto *OPT = getAs<PointerType>()) |
6538 | return OPT->getPointeeType()->isSpecificBuiltinType(BuiltinType::ObjCSel); |
6539 | return false; |
6540 | } |
6541 | |
6542 | inline bool Type::isObjCBuiltinType() const { |
6543 | return isObjCIdType() || isObjCClassType() || isObjCSelType(); |
6544 | } |
6545 | |
6546 | inline bool Type::isDecltypeType() const { |
6547 | return isa<DecltypeType>(this); |
6548 | } |
6549 | |
6550 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \ |
6551 | inline bool Type::is##Id##Type() const { \ |
6552 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6553 | } |
6554 | #include "clang/Basic/OpenCLImageTypes.def" |
6555 | |
6556 | inline bool Type::isSamplerT() const { |
6557 | return isSpecificBuiltinType(BuiltinType::OCLSampler); |
6558 | } |
6559 | |
6560 | inline bool Type::isEventT() const { |
6561 | return isSpecificBuiltinType(BuiltinType::OCLEvent); |
6562 | } |
6563 | |
6564 | inline bool Type::isClkEventT() const { |
6565 | return isSpecificBuiltinType(BuiltinType::OCLClkEvent); |
6566 | } |
6567 | |
6568 | inline bool Type::isQueueT() const { |
6569 | return isSpecificBuiltinType(BuiltinType::OCLQueue); |
6570 | } |
6571 | |
6572 | inline bool Type::isReserveIDT() const { |
6573 | return isSpecificBuiltinType(BuiltinType::OCLReserveID); |
6574 | } |
6575 | |
6576 | inline bool Type::isImageType() const { |
6577 | #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) is##Id##Type() || |
6578 | return |
6579 | #include "clang/Basic/OpenCLImageTypes.def" |
6580 | false; // end boolean or operation |
6581 | } |
6582 | |
6583 | inline bool Type::isPipeType() const { |
6584 | return isa<PipeType>(CanonicalType); |
6585 | } |
6586 | |
6587 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \ |
6588 | inline bool Type::is##Id##Type() const { \ |
6589 | return isSpecificBuiltinType(BuiltinType::Id); \ |
6590 | } |
6591 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6592 | |
6593 | inline bool Type::isOCLIntelSubgroupAVCType() const { |
6594 | #define INTEL_SUBGROUP_AVC_TYPE(ExtType, Id) \ |
6595 | isOCLIntelSubgroupAVC##Id##Type() || |
6596 | return |
6597 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6598 | false; // end of boolean or operation |
6599 | } |
6600 | |
6601 | inline bool Type::isOCLExtOpaqueType() const { |
6602 | #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) is##Id##Type() || |
6603 | return |
6604 | #include "clang/Basic/OpenCLExtensionTypes.def" |
6605 | false; // end of boolean or operation |
6606 | } |
6607 | |
6608 | inline bool Type::isOpenCLSpecificType() const { |
6609 | return isSamplerT() || isEventT() || isImageType() || isClkEventT() || |
6610 | isQueueT() || isReserveIDT() || isPipeType() || isOCLExtOpaqueType(); |
6611 | } |
6612 | |
6613 | inline bool Type::isTemplateTypeParmType() const { |
6614 | return isa<TemplateTypeParmType>(CanonicalType); |
6615 | } |
6616 | |
6617 | inline bool Type::isSpecificBuiltinType(unsigned K) const { |
6618 | if (const BuiltinType *BT = getAs<BuiltinType>()) |
6619 | if (BT->getKind() == (BuiltinType::Kind) K) |
6620 | return true; |
6621 | return false; |
6622 | } |
6623 | |
6624 | inline bool Type::isPlaceholderType() const { |
6625 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6626 | return BT->isPlaceholderType(); |
6627 | return false; |
6628 | } |
6629 | |
6630 | inline const BuiltinType *Type::getAsPlaceholderType() const { |
6631 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6632 | if (BT->isPlaceholderType()) |
6633 | return BT; |
6634 | return nullptr; |
6635 | } |
6636 | |
6637 | inline bool Type::isSpecificPlaceholderType(unsigned K) const { |
6638 | assert(BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K))((BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)) ? static_cast<void> (0) : __assert_fail ("BuiltinType::isPlaceholderTypeKind((BuiltinType::Kind) K)" , "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6638, __PRETTY_FUNCTION__)); |
6639 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6640 | return (BT->getKind() == (BuiltinType::Kind) K); |
6641 | return false; |
6642 | } |
6643 | |
6644 | inline bool Type::isNonOverloadPlaceholderType() const { |
6645 | if (const auto *BT = dyn_cast<BuiltinType>(this)) |
6646 | return BT->isNonOverloadPlaceholderType(); |
6647 | return false; |
6648 | } |
6649 | |
6650 | inline bool Type::isVoidType() const { |
6651 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6652 | return BT->getKind() == BuiltinType::Void; |
6653 | return false; |
6654 | } |
6655 | |
6656 | inline bool Type::isHalfType() const { |
6657 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6658 | return BT->getKind() == BuiltinType::Half; |
6659 | // FIXME: Should we allow complex __fp16? Probably not. |
6660 | return false; |
6661 | } |
6662 | |
6663 | inline bool Type::isFloat16Type() const { |
6664 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6665 | return BT->getKind() == BuiltinType::Float16; |
6666 | return false; |
6667 | } |
6668 | |
6669 | inline bool Type::isFloat128Type() const { |
6670 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6671 | return BT->getKind() == BuiltinType::Float128; |
6672 | return false; |
6673 | } |
6674 | |
6675 | inline bool Type::isNullPtrType() const { |
6676 | if (const auto *BT = getAs<BuiltinType>()) |
6677 | return BT->getKind() == BuiltinType::NullPtr; |
6678 | return false; |
6679 | } |
6680 | |
6681 | bool IsEnumDeclComplete(EnumDecl *); |
6682 | bool IsEnumDeclScoped(EnumDecl *); |
6683 | |
6684 | inline bool Type::isIntegerType() const { |
6685 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6686 | return BT->getKind() >= BuiltinType::Bool && |
6687 | BT->getKind() <= BuiltinType::Int128; |
6688 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) { |
6689 | // Incomplete enum types are not treated as integer types. |
6690 | // FIXME: In C++, enum types are never integer types. |
6691 | return IsEnumDeclComplete(ET->getDecl()) && |
6692 | !IsEnumDeclScoped(ET->getDecl()); |
6693 | } |
6694 | return false; |
6695 | } |
6696 | |
6697 | inline bool Type::isFixedPointType() const { |
6698 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
6699 | return BT->getKind() >= BuiltinType::ShortAccum && |
6700 | BT->getKind() <= BuiltinType::SatULongFract; |
6701 | } |
6702 | return false; |
6703 | } |
6704 | |
6705 | inline bool Type::isFixedPointOrIntegerType() const { |
6706 | return isFixedPointType() || isIntegerType(); |
6707 | } |
6708 | |
6709 | inline bool Type::isSaturatedFixedPointType() const { |
6710 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
6711 | return BT->getKind() >= BuiltinType::SatShortAccum && |
6712 | BT->getKind() <= BuiltinType::SatULongFract; |
6713 | } |
6714 | return false; |
6715 | } |
6716 | |
6717 | inline bool Type::isUnsaturatedFixedPointType() const { |
6718 | return isFixedPointType() && !isSaturatedFixedPointType(); |
6719 | } |
6720 | |
6721 | inline bool Type::isSignedFixedPointType() const { |
6722 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) { |
6723 | return ((BT->getKind() >= BuiltinType::ShortAccum && |
6724 | BT->getKind() <= BuiltinType::LongAccum) || |
6725 | (BT->getKind() >= BuiltinType::ShortFract && |
6726 | BT->getKind() <= BuiltinType::LongFract) || |
6727 | (BT->getKind() >= BuiltinType::SatShortAccum && |
6728 | BT->getKind() <= BuiltinType::SatLongAccum) || |
6729 | (BT->getKind() >= BuiltinType::SatShortFract && |
6730 | BT->getKind() <= BuiltinType::SatLongFract)); |
6731 | } |
6732 | return false; |
6733 | } |
6734 | |
6735 | inline bool Type::isUnsignedFixedPointType() const { |
6736 | return isFixedPointType() && !isSignedFixedPointType(); |
6737 | } |
6738 | |
6739 | inline bool Type::isScalarType() const { |
6740 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6741 | return BT->getKind() > BuiltinType::Void && |
6742 | BT->getKind() <= BuiltinType::NullPtr; |
6743 | if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) |
6744 | // Enums are scalar types, but only if they are defined. Incomplete enums |
6745 | // are not treated as scalar types. |
6746 | return IsEnumDeclComplete(ET->getDecl()); |
6747 | return isa<PointerType>(CanonicalType) || |
6748 | isa<BlockPointerType>(CanonicalType) || |
6749 | isa<MemberPointerType>(CanonicalType) || |
6750 | isa<ComplexType>(CanonicalType) || |
6751 | isa<ObjCObjectPointerType>(CanonicalType); |
6752 | } |
6753 | |
6754 | inline bool Type::isIntegralOrEnumerationType() const { |
6755 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6756 | return BT->getKind() >= BuiltinType::Bool && |
6757 | BT->getKind() <= BuiltinType::Int128; |
6758 | |
6759 | // Check for a complete enum type; incomplete enum types are not properly an |
6760 | // enumeration type in the sense required here. |
6761 | if (const auto *ET = dyn_cast<EnumType>(CanonicalType)) |
6762 | return IsEnumDeclComplete(ET->getDecl()); |
6763 | |
6764 | return false; |
6765 | } |
6766 | |
6767 | inline bool Type::isBooleanType() const { |
6768 | if (const auto *BT = dyn_cast<BuiltinType>(CanonicalType)) |
6769 | return BT->getKind() == BuiltinType::Bool; |
6770 | return false; |
6771 | } |
6772 | |
6773 | inline bool Type::isUndeducedType() const { |
6774 | auto *DT = getContainedDeducedType(); |
6775 | return DT && !DT->isDeduced(); |
6776 | } |
6777 | |
6778 | /// Determines whether this is a type for which one can define |
6779 | /// an overloaded operator. |
6780 | inline bool Type::isOverloadableType() const { |
6781 | return isDependentType() || isRecordType() || isEnumeralType(); |
6782 | } |
6783 | |
6784 | /// Determines whether this type can decay to a pointer type. |
6785 | inline bool Type::canDecayToPointerType() const { |
6786 | return isFunctionType() || isArrayType(); |
6787 | } |
6788 | |
6789 | inline bool Type::hasPointerRepresentation() const { |
6790 | return (isPointerType() || isReferenceType() || isBlockPointerType() || |
6791 | isObjCObjectPointerType() || isNullPtrType()); |
6792 | } |
6793 | |
6794 | inline bool Type::hasObjCPointerRepresentation() const { |
6795 | return isObjCObjectPointerType(); |
6796 | } |
6797 | |
6798 | inline const Type *Type::getBaseElementTypeUnsafe() const { |
6799 | const Type *type = this; |
6800 | while (const ArrayType *arrayType = type->getAsArrayTypeUnsafe()) |
6801 | type = arrayType->getElementType().getTypePtr(); |
6802 | return type; |
6803 | } |
6804 | |
6805 | inline const Type *Type::getPointeeOrArrayElementType() const { |
6806 | const Type *type = this; |
6807 | if (type->isAnyPointerType()) |
6808 | return type->getPointeeType().getTypePtr(); |
6809 | else if (type->isArrayType()) |
6810 | return type->getBaseElementTypeUnsafe(); |
6811 | return type; |
6812 | } |
6813 | |
6814 | /// Insertion operator for diagnostics. This allows sending Qualifiers into a |
6815 | /// diagnostic with <<. |
6816 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, |
6817 | Qualifiers Q) { |
6818 | DB.AddTaggedVal(Q.getAsOpaqueValue(), |
6819 | DiagnosticsEngine::ArgumentKind::ak_qual); |
6820 | return DB; |
6821 | } |
6822 | |
6823 | /// Insertion operator for partial diagnostics. This allows sending Qualifiers |
6824 | /// into a diagnostic with <<. |
6825 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, |
6826 | Qualifiers Q) { |
6827 | PD.AddTaggedVal(Q.getAsOpaqueValue(), |
6828 | DiagnosticsEngine::ArgumentKind::ak_qual); |
6829 | return PD; |
6830 | } |
6831 | |
6832 | /// Insertion operator for diagnostics. This allows sending QualType's into a |
6833 | /// diagnostic with <<. |
6834 | inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB, |
6835 | QualType T) { |
6836 | DB.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), |
6837 | DiagnosticsEngine::ak_qualtype); |
6838 | return DB; |
6839 | } |
6840 | |
6841 | /// Insertion operator for partial diagnostics. This allows sending QualType's |
6842 | /// into a diagnostic with <<. |
6843 | inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD, |
6844 | QualType T) { |
6845 | PD.AddTaggedVal(reinterpret_cast<intptr_t>(T.getAsOpaquePtr()), |
6846 | DiagnosticsEngine::ak_qualtype); |
6847 | return PD; |
6848 | } |
6849 | |
6850 | // Helper class template that is used by Type::getAs to ensure that one does |
6851 | // not try to look through a qualified type to get to an array type. |
6852 | template <typename T> |
6853 | using TypeIsArrayType = |
6854 | std::integral_constant<bool, std::is_same<T, ArrayType>::value || |
6855 | std::is_base_of<ArrayType, T>::value>; |
6856 | |
6857 | // Member-template getAs<specific type>'. |
6858 | template <typename T> const T *Type::getAs() const { |
6859 | static_assert(!TypeIsArrayType<T>::value, |
6860 | "ArrayType cannot be used with getAs!"); |
6861 | |
6862 | // If this is directly a T type, return it. |
6863 | if (const auto *Ty = dyn_cast<T>(this)) |
6864 | return Ty; |
6865 | |
6866 | // If the canonical form of this type isn't the right kind, reject it. |
6867 | if (!isa<T>(CanonicalType)) |
6868 | return nullptr; |
6869 | |
6870 | // If this is a typedef for the type, strip the typedef off without |
6871 | // losing all typedef information. |
6872 | return cast<T>(getUnqualifiedDesugaredType()); |
6873 | } |
6874 | |
6875 | template <typename T> const T *Type::getAsAdjusted() const { |
6876 | static_assert(!TypeIsArrayType<T>::value, "ArrayType cannot be used with getAsAdjusted!"); |
6877 | |
6878 | // If this is directly a T type, return it. |
6879 | if (const auto *Ty = dyn_cast<T>(this)) |
6880 | return Ty; |
6881 | |
6882 | // If the canonical form of this type isn't the right kind, reject it. |
6883 | if (!isa<T>(CanonicalType)) |
6884 | return nullptr; |
6885 | |
6886 | // Strip off type adjustments that do not modify the underlying nature of the |
6887 | // type. |
6888 | const Type *Ty = this; |
6889 | while (Ty) { |
6890 | if (const auto *A = dyn_cast<AttributedType>(Ty)) |
6891 | Ty = A->getModifiedType().getTypePtr(); |
6892 | else if (const auto *E = dyn_cast<ElaboratedType>(Ty)) |
6893 | Ty = E->desugar().getTypePtr(); |
6894 | else if (const auto *P = dyn_cast<ParenType>(Ty)) |
6895 | Ty = P->desugar().getTypePtr(); |
6896 | else if (const auto *A = dyn_cast<AdjustedType>(Ty)) |
6897 | Ty = A->desugar().getTypePtr(); |
6898 | else if (const auto *M = dyn_cast<MacroQualifiedType>(Ty)) |
6899 | Ty = M->desugar().getTypePtr(); |
6900 | else |
6901 | break; |
6902 | } |
6903 | |
6904 | // Just because the canonical type is correct does not mean we can use cast<>, |
6905 | // since we may not have stripped off all the sugar down to the base type. |
6906 | return dyn_cast<T>(Ty); |
6907 | } |
6908 | |
6909 | inline const ArrayType *Type::getAsArrayTypeUnsafe() const { |
6910 | // If this is directly an array type, return it. |
6911 | if (const auto *arr = dyn_cast<ArrayType>(this)) |
6912 | return arr; |
6913 | |
6914 | // If the canonical form of this type isn't the right kind, reject it. |
6915 | if (!isa<ArrayType>(CanonicalType)) |
6916 | return nullptr; |
6917 | |
6918 | // If this is a typedef for the type, strip the typedef off without |
6919 | // losing all typedef information. |
6920 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
6921 | } |
6922 | |
6923 | template <typename T> const T *Type::castAs() const { |
6924 | static_assert(!TypeIsArrayType<T>::value, |
6925 | "ArrayType cannot be used with castAs!"); |
6926 | |
6927 | if (const auto *ty = dyn_cast<T>(this)) return ty; |
6928 | assert(isa<T>(CanonicalType))((isa<T>(CanonicalType)) ? static_cast<void> (0) : __assert_fail ("isa<T>(CanonicalType)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6928, __PRETTY_FUNCTION__)); |
6929 | return cast<T>(getUnqualifiedDesugaredType()); |
6930 | } |
6931 | |
6932 | inline const ArrayType *Type::castAsArrayTypeUnsafe() const { |
6933 | assert(isa<ArrayType>(CanonicalType))((isa<ArrayType>(CanonicalType)) ? static_cast<void> (0) : __assert_fail ("isa<ArrayType>(CanonicalType)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6933, __PRETTY_FUNCTION__)); |
6934 | if (const auto *arr = dyn_cast<ArrayType>(this)) return arr; |
6935 | return cast<ArrayType>(getUnqualifiedDesugaredType()); |
6936 | } |
6937 | |
6938 | DecayedType::DecayedType(QualType OriginalType, QualType DecayedPtr, |
6939 | QualType CanonicalPtr) |
6940 | : AdjustedType(Decayed, OriginalType, DecayedPtr, CanonicalPtr) { |
6941 | #ifndef NDEBUG |
6942 | QualType Adjusted = getAdjustedType(); |
6943 | (void)AttributedType::stripOuterNullability(Adjusted); |
6944 | assert(isa<PointerType>(Adjusted))((isa<PointerType>(Adjusted)) ? static_cast<void> (0) : __assert_fail ("isa<PointerType>(Adjusted)", "/build/llvm-toolchain-snapshot-10~svn373517/tools/clang/include/clang/AST/Type.h" , 6944, __PRETTY_FUNCTION__)); |
6945 | #endif |
6946 | } |
6947 | |
6948 | QualType DecayedType::getPointeeType() const { |
6949 | QualType Decayed = getDecayedType(); |
6950 | (void)AttributedType::stripOuterNullability(Decayed); |
6951 | return cast<PointerType>(Decayed)->getPointeeType(); |
6952 | } |
6953 | |
6954 | // Get the decimal string representation of a fixed point type, represented |
6955 | // as a scaled integer. |
6956 | // TODO: At some point, we should change the arguments to instead just accept an |
6957 | // APFixedPoint instead of APSInt and scale. |
6958 | void FixedPointValueToString(SmallVectorImpl<char> &Str, llvm::APSInt Val, |
6959 | unsigned Scale); |
6960 | |
6961 | } // namespace clang |
6962 | |
6963 | #endif // LLVM_CLANG_AST_TYPE_H |