File: | clang/lib/Sema/SemaDecl.cpp |
Warning: | line 16809, column 5 Called C++ object pointer is null |
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1 | //===--- SemaDecl.cpp - Semantic Analysis for 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 declarations. | ||||||
10 | // | ||||||
11 | //===----------------------------------------------------------------------===// | ||||||
12 | |||||||
13 | #include "TypeLocBuilder.h" | ||||||
14 | #include "clang/AST/ASTConsumer.h" | ||||||
15 | #include "clang/AST/ASTContext.h" | ||||||
16 | #include "clang/AST/ASTLambda.h" | ||||||
17 | #include "clang/AST/CXXInheritance.h" | ||||||
18 | #include "clang/AST/CharUnits.h" | ||||||
19 | #include "clang/AST/CommentDiagnostic.h" | ||||||
20 | #include "clang/AST/DeclCXX.h" | ||||||
21 | #include "clang/AST/DeclObjC.h" | ||||||
22 | #include "clang/AST/DeclTemplate.h" | ||||||
23 | #include "clang/AST/EvaluatedExprVisitor.h" | ||||||
24 | #include "clang/AST/Expr.h" | ||||||
25 | #include "clang/AST/ExprCXX.h" | ||||||
26 | #include "clang/AST/NonTrivialTypeVisitor.h" | ||||||
27 | #include "clang/AST/StmtCXX.h" | ||||||
28 | #include "clang/Basic/Builtins.h" | ||||||
29 | #include "clang/Basic/PartialDiagnostic.h" | ||||||
30 | #include "clang/Basic/SourceManager.h" | ||||||
31 | #include "clang/Basic/TargetInfo.h" | ||||||
32 | #include "clang/Lex/HeaderSearch.h" // TODO: Sema shouldn't depend on Lex | ||||||
33 | #include "clang/Lex/Lexer.h" // TODO: Extract static functions to fix layering. | ||||||
34 | #include "clang/Lex/ModuleLoader.h" // TODO: Sema shouldn't depend on Lex | ||||||
35 | #include "clang/Lex/Preprocessor.h" // Included for isCodeCompletionEnabled() | ||||||
36 | #include "clang/Sema/CXXFieldCollector.h" | ||||||
37 | #include "clang/Sema/DeclSpec.h" | ||||||
38 | #include "clang/Sema/DelayedDiagnostic.h" | ||||||
39 | #include "clang/Sema/Initialization.h" | ||||||
40 | #include "clang/Sema/Lookup.h" | ||||||
41 | #include "clang/Sema/ParsedTemplate.h" | ||||||
42 | #include "clang/Sema/Scope.h" | ||||||
43 | #include "clang/Sema/ScopeInfo.h" | ||||||
44 | #include "clang/Sema/SemaInternal.h" | ||||||
45 | #include "clang/Sema/Template.h" | ||||||
46 | #include "llvm/ADT/SmallString.h" | ||||||
47 | #include "llvm/ADT/Triple.h" | ||||||
48 | #include <algorithm> | ||||||
49 | #include <cstring> | ||||||
50 | #include <functional> | ||||||
51 | #include <unordered_map> | ||||||
52 | |||||||
53 | using namespace clang; | ||||||
54 | using namespace sema; | ||||||
55 | |||||||
56 | Sema::DeclGroupPtrTy Sema::ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType) { | ||||||
57 | if (OwnedType) { | ||||||
58 | Decl *Group[2] = { OwnedType, Ptr }; | ||||||
59 | return DeclGroupPtrTy::make(DeclGroupRef::Create(Context, Group, 2)); | ||||||
60 | } | ||||||
61 | |||||||
62 | return DeclGroupPtrTy::make(DeclGroupRef(Ptr)); | ||||||
63 | } | ||||||
64 | |||||||
65 | namespace { | ||||||
66 | |||||||
67 | class TypeNameValidatorCCC final : public CorrectionCandidateCallback { | ||||||
68 | public: | ||||||
69 | TypeNameValidatorCCC(bool AllowInvalid, bool WantClass = false, | ||||||
70 | bool AllowTemplates = false, | ||||||
71 | bool AllowNonTemplates = true) | ||||||
72 | : AllowInvalidDecl(AllowInvalid), WantClassName(WantClass), | ||||||
73 | AllowTemplates(AllowTemplates), AllowNonTemplates(AllowNonTemplates) { | ||||||
74 | WantExpressionKeywords = false; | ||||||
75 | WantCXXNamedCasts = false; | ||||||
76 | WantRemainingKeywords = false; | ||||||
77 | } | ||||||
78 | |||||||
79 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
80 | if (NamedDecl *ND = candidate.getCorrectionDecl()) { | ||||||
81 | if (!AllowInvalidDecl && ND->isInvalidDecl()) | ||||||
82 | return false; | ||||||
83 | |||||||
84 | if (getAsTypeTemplateDecl(ND)) | ||||||
85 | return AllowTemplates; | ||||||
86 | |||||||
87 | bool IsType = isa<TypeDecl>(ND) || isa<ObjCInterfaceDecl>(ND); | ||||||
88 | if (!IsType) | ||||||
89 | return false; | ||||||
90 | |||||||
91 | if (AllowNonTemplates) | ||||||
92 | return true; | ||||||
93 | |||||||
94 | // An injected-class-name of a class template (specialization) is valid | ||||||
95 | // as a template or as a non-template. | ||||||
96 | if (AllowTemplates) { | ||||||
97 | auto *RD = dyn_cast<CXXRecordDecl>(ND); | ||||||
98 | if (!RD || !RD->isInjectedClassName()) | ||||||
99 | return false; | ||||||
100 | RD = cast<CXXRecordDecl>(RD->getDeclContext()); | ||||||
101 | return RD->getDescribedClassTemplate() || | ||||||
102 | isa<ClassTemplateSpecializationDecl>(RD); | ||||||
103 | } | ||||||
104 | |||||||
105 | return false; | ||||||
106 | } | ||||||
107 | |||||||
108 | return !WantClassName && candidate.isKeyword(); | ||||||
109 | } | ||||||
110 | |||||||
111 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
112 | return std::make_unique<TypeNameValidatorCCC>(*this); | ||||||
113 | } | ||||||
114 | |||||||
115 | private: | ||||||
116 | bool AllowInvalidDecl; | ||||||
117 | bool WantClassName; | ||||||
118 | bool AllowTemplates; | ||||||
119 | bool AllowNonTemplates; | ||||||
120 | }; | ||||||
121 | |||||||
122 | } // end anonymous namespace | ||||||
123 | |||||||
124 | /// Determine whether the token kind starts a simple-type-specifier. | ||||||
125 | bool Sema::isSimpleTypeSpecifier(tok::TokenKind Kind) const { | ||||||
126 | switch (Kind) { | ||||||
127 | // FIXME: Take into account the current language when deciding whether a | ||||||
128 | // token kind is a valid type specifier | ||||||
129 | case tok::kw_short: | ||||||
130 | case tok::kw_long: | ||||||
131 | case tok::kw___int64: | ||||||
132 | case tok::kw___int128: | ||||||
133 | case tok::kw_signed: | ||||||
134 | case tok::kw_unsigned: | ||||||
135 | case tok::kw_void: | ||||||
136 | case tok::kw_char: | ||||||
137 | case tok::kw_int: | ||||||
138 | case tok::kw_half: | ||||||
139 | case tok::kw_float: | ||||||
140 | case tok::kw_double: | ||||||
141 | case tok::kw___bf16: | ||||||
142 | case tok::kw__Float16: | ||||||
143 | case tok::kw___float128: | ||||||
144 | case tok::kw_wchar_t: | ||||||
145 | case tok::kw_bool: | ||||||
146 | case tok::kw___underlying_type: | ||||||
147 | case tok::kw___auto_type: | ||||||
148 | return true; | ||||||
149 | |||||||
150 | case tok::annot_typename: | ||||||
151 | case tok::kw_char16_t: | ||||||
152 | case tok::kw_char32_t: | ||||||
153 | case tok::kw_typeof: | ||||||
154 | case tok::annot_decltype: | ||||||
155 | case tok::kw_decltype: | ||||||
156 | return getLangOpts().CPlusPlus; | ||||||
157 | |||||||
158 | case tok::kw_char8_t: | ||||||
159 | return getLangOpts().Char8; | ||||||
160 | |||||||
161 | default: | ||||||
162 | break; | ||||||
163 | } | ||||||
164 | |||||||
165 | return false; | ||||||
166 | } | ||||||
167 | |||||||
168 | namespace { | ||||||
169 | enum class UnqualifiedTypeNameLookupResult { | ||||||
170 | NotFound, | ||||||
171 | FoundNonType, | ||||||
172 | FoundType | ||||||
173 | }; | ||||||
174 | } // end anonymous namespace | ||||||
175 | |||||||
176 | /// Tries to perform unqualified lookup of the type decls in bases for | ||||||
177 | /// dependent class. | ||||||
178 | /// \return \a NotFound if no any decls is found, \a FoundNotType if found not a | ||||||
179 | /// type decl, \a FoundType if only type decls are found. | ||||||
180 | static UnqualifiedTypeNameLookupResult | ||||||
181 | lookupUnqualifiedTypeNameInBase(Sema &S, const IdentifierInfo &II, | ||||||
182 | SourceLocation NameLoc, | ||||||
183 | const CXXRecordDecl *RD) { | ||||||
184 | if (!RD->hasDefinition()) | ||||||
185 | return UnqualifiedTypeNameLookupResult::NotFound; | ||||||
186 | // Look for type decls in base classes. | ||||||
187 | UnqualifiedTypeNameLookupResult FoundTypeDecl = | ||||||
188 | UnqualifiedTypeNameLookupResult::NotFound; | ||||||
189 | for (const auto &Base : RD->bases()) { | ||||||
190 | const CXXRecordDecl *BaseRD = nullptr; | ||||||
191 | if (auto *BaseTT = Base.getType()->getAs<TagType>()) | ||||||
192 | BaseRD = BaseTT->getAsCXXRecordDecl(); | ||||||
193 | else if (auto *TST = Base.getType()->getAs<TemplateSpecializationType>()) { | ||||||
194 | // Look for type decls in dependent base classes that have known primary | ||||||
195 | // templates. | ||||||
196 | if (!TST || !TST->isDependentType()) | ||||||
197 | continue; | ||||||
198 | auto *TD = TST->getTemplateName().getAsTemplateDecl(); | ||||||
199 | if (!TD) | ||||||
200 | continue; | ||||||
201 | if (auto *BasePrimaryTemplate = | ||||||
202 | dyn_cast_or_null<CXXRecordDecl>(TD->getTemplatedDecl())) { | ||||||
203 | if (BasePrimaryTemplate->getCanonicalDecl() != RD->getCanonicalDecl()) | ||||||
204 | BaseRD = BasePrimaryTemplate; | ||||||
205 | else if (auto *CTD = dyn_cast<ClassTemplateDecl>(TD)) { | ||||||
206 | if (const ClassTemplatePartialSpecializationDecl *PS = | ||||||
207 | CTD->findPartialSpecialization(Base.getType())) | ||||||
208 | if (PS->getCanonicalDecl() != RD->getCanonicalDecl()) | ||||||
209 | BaseRD = PS; | ||||||
210 | } | ||||||
211 | } | ||||||
212 | } | ||||||
213 | if (BaseRD) { | ||||||
214 | for (NamedDecl *ND : BaseRD->lookup(&II)) { | ||||||
215 | if (!isa<TypeDecl>(ND)) | ||||||
216 | return UnqualifiedTypeNameLookupResult::FoundNonType; | ||||||
217 | FoundTypeDecl = UnqualifiedTypeNameLookupResult::FoundType; | ||||||
218 | } | ||||||
219 | if (FoundTypeDecl == UnqualifiedTypeNameLookupResult::NotFound) { | ||||||
220 | switch (lookupUnqualifiedTypeNameInBase(S, II, NameLoc, BaseRD)) { | ||||||
221 | case UnqualifiedTypeNameLookupResult::FoundNonType: | ||||||
222 | return UnqualifiedTypeNameLookupResult::FoundNonType; | ||||||
223 | case UnqualifiedTypeNameLookupResult::FoundType: | ||||||
224 | FoundTypeDecl = UnqualifiedTypeNameLookupResult::FoundType; | ||||||
225 | break; | ||||||
226 | case UnqualifiedTypeNameLookupResult::NotFound: | ||||||
227 | break; | ||||||
228 | } | ||||||
229 | } | ||||||
230 | } | ||||||
231 | } | ||||||
232 | |||||||
233 | return FoundTypeDecl; | ||||||
234 | } | ||||||
235 | |||||||
236 | static ParsedType recoverFromTypeInKnownDependentBase(Sema &S, | ||||||
237 | const IdentifierInfo &II, | ||||||
238 | SourceLocation NameLoc) { | ||||||
239 | // Lookup in the parent class template context, if any. | ||||||
240 | const CXXRecordDecl *RD = nullptr; | ||||||
241 | UnqualifiedTypeNameLookupResult FoundTypeDecl = | ||||||
242 | UnqualifiedTypeNameLookupResult::NotFound; | ||||||
243 | for (DeclContext *DC = S.CurContext; | ||||||
244 | DC && FoundTypeDecl == UnqualifiedTypeNameLookupResult::NotFound; | ||||||
245 | DC = DC->getParent()) { | ||||||
246 | // Look for type decls in dependent base classes that have known primary | ||||||
247 | // templates. | ||||||
248 | RD = dyn_cast<CXXRecordDecl>(DC); | ||||||
249 | if (RD && RD->getDescribedClassTemplate()) | ||||||
250 | FoundTypeDecl = lookupUnqualifiedTypeNameInBase(S, II, NameLoc, RD); | ||||||
251 | } | ||||||
252 | if (FoundTypeDecl != UnqualifiedTypeNameLookupResult::FoundType) | ||||||
253 | return nullptr; | ||||||
254 | |||||||
255 | // We found some types in dependent base classes. Recover as if the user | ||||||
256 | // wrote 'typename MyClass::II' instead of 'II'. We'll fully resolve the | ||||||
257 | // lookup during template instantiation. | ||||||
258 | S.Diag(NameLoc, diag::ext_found_in_dependent_base) << &II; | ||||||
259 | |||||||
260 | ASTContext &Context = S.Context; | ||||||
261 | auto *NNS = NestedNameSpecifier::Create(Context, nullptr, false, | ||||||
262 | cast<Type>(Context.getRecordType(RD))); | ||||||
263 | QualType T = Context.getDependentNameType(ETK_Typename, NNS, &II); | ||||||
264 | |||||||
265 | CXXScopeSpec SS; | ||||||
266 | SS.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
267 | |||||||
268 | TypeLocBuilder Builder; | ||||||
269 | DependentNameTypeLoc DepTL = Builder.push<DependentNameTypeLoc>(T); | ||||||
270 | DepTL.setNameLoc(NameLoc); | ||||||
271 | DepTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
272 | DepTL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
273 | return S.CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
274 | } | ||||||
275 | |||||||
276 | /// If the identifier refers to a type name within this scope, | ||||||
277 | /// return the declaration of that type. | ||||||
278 | /// | ||||||
279 | /// This routine performs ordinary name lookup of the identifier II | ||||||
280 | /// within the given scope, with optional C++ scope specifier SS, to | ||||||
281 | /// determine whether the name refers to a type. If so, returns an | ||||||
282 | /// opaque pointer (actually a QualType) corresponding to that | ||||||
283 | /// type. Otherwise, returns NULL. | ||||||
284 | ParsedType Sema::getTypeName(const IdentifierInfo &II, SourceLocation NameLoc, | ||||||
285 | Scope *S, CXXScopeSpec *SS, | ||||||
286 | bool isClassName, bool HasTrailingDot, | ||||||
287 | ParsedType ObjectTypePtr, | ||||||
288 | bool IsCtorOrDtorName, | ||||||
289 | bool WantNontrivialTypeSourceInfo, | ||||||
290 | bool IsClassTemplateDeductionContext, | ||||||
291 | IdentifierInfo **CorrectedII) { | ||||||
292 | // FIXME: Consider allowing this outside C++1z mode as an extension. | ||||||
293 | bool AllowDeducedTemplate = IsClassTemplateDeductionContext && | ||||||
294 | getLangOpts().CPlusPlus17 && !IsCtorOrDtorName && | ||||||
295 | !isClassName && !HasTrailingDot; | ||||||
296 | |||||||
297 | // Determine where we will perform name lookup. | ||||||
298 | DeclContext *LookupCtx = nullptr; | ||||||
299 | if (ObjectTypePtr) { | ||||||
300 | QualType ObjectType = ObjectTypePtr.get(); | ||||||
301 | if (ObjectType->isRecordType()) | ||||||
302 | LookupCtx = computeDeclContext(ObjectType); | ||||||
303 | } else if (SS && SS->isNotEmpty()) { | ||||||
304 | LookupCtx = computeDeclContext(*SS, false); | ||||||
305 | |||||||
306 | if (!LookupCtx) { | ||||||
307 | if (isDependentScopeSpecifier(*SS)) { | ||||||
308 | // C++ [temp.res]p3: | ||||||
309 | // A qualified-id that refers to a type and in which the | ||||||
310 | // nested-name-specifier depends on a template-parameter (14.6.2) | ||||||
311 | // shall be prefixed by the keyword typename to indicate that the | ||||||
312 | // qualified-id denotes a type, forming an | ||||||
313 | // elaborated-type-specifier (7.1.5.3). | ||||||
314 | // | ||||||
315 | // We therefore do not perform any name lookup if the result would | ||||||
316 | // refer to a member of an unknown specialization. | ||||||
317 | if (!isClassName && !IsCtorOrDtorName) | ||||||
318 | return nullptr; | ||||||
319 | |||||||
320 | // We know from the grammar that this name refers to a type, | ||||||
321 | // so build a dependent node to describe the type. | ||||||
322 | if (WantNontrivialTypeSourceInfo) | ||||||
323 | return ActOnTypenameType(S, SourceLocation(), *SS, II, NameLoc).get(); | ||||||
324 | |||||||
325 | NestedNameSpecifierLoc QualifierLoc = SS->getWithLocInContext(Context); | ||||||
326 | QualType T = CheckTypenameType(ETK_None, SourceLocation(), QualifierLoc, | ||||||
327 | II, NameLoc); | ||||||
328 | return ParsedType::make(T); | ||||||
329 | } | ||||||
330 | |||||||
331 | return nullptr; | ||||||
332 | } | ||||||
333 | |||||||
334 | if (!LookupCtx->isDependentContext() && | ||||||
335 | RequireCompleteDeclContext(*SS, LookupCtx)) | ||||||
336 | return nullptr; | ||||||
337 | } | ||||||
338 | |||||||
339 | // FIXME: LookupNestedNameSpecifierName isn't the right kind of | ||||||
340 | // lookup for class-names. | ||||||
341 | LookupNameKind Kind = isClassName ? LookupNestedNameSpecifierName : | ||||||
342 | LookupOrdinaryName; | ||||||
343 | LookupResult Result(*this, &II, NameLoc, Kind); | ||||||
344 | if (LookupCtx) { | ||||||
345 | // Perform "qualified" name lookup into the declaration context we | ||||||
346 | // computed, which is either the type of the base of a member access | ||||||
347 | // expression or the declaration context associated with a prior | ||||||
348 | // nested-name-specifier. | ||||||
349 | LookupQualifiedName(Result, LookupCtx); | ||||||
350 | |||||||
351 | if (ObjectTypePtr && Result.empty()) { | ||||||
352 | // C++ [basic.lookup.classref]p3: | ||||||
353 | // If the unqualified-id is ~type-name, the type-name is looked up | ||||||
354 | // in the context of the entire postfix-expression. If the type T of | ||||||
355 | // the object expression is of a class type C, the type-name is also | ||||||
356 | // looked up in the scope of class C. At least one of the lookups shall | ||||||
357 | // find a name that refers to (possibly cv-qualified) T. | ||||||
358 | LookupName(Result, S); | ||||||
359 | } | ||||||
360 | } else { | ||||||
361 | // Perform unqualified name lookup. | ||||||
362 | LookupName(Result, S); | ||||||
363 | |||||||
364 | // For unqualified lookup in a class template in MSVC mode, look into | ||||||
365 | // dependent base classes where the primary class template is known. | ||||||
366 | if (Result.empty() && getLangOpts().MSVCCompat && (!SS || SS->isEmpty())) { | ||||||
367 | if (ParsedType TypeInBase = | ||||||
368 | recoverFromTypeInKnownDependentBase(*this, II, NameLoc)) | ||||||
369 | return TypeInBase; | ||||||
370 | } | ||||||
371 | } | ||||||
372 | |||||||
373 | NamedDecl *IIDecl = nullptr; | ||||||
374 | switch (Result.getResultKind()) { | ||||||
375 | case LookupResult::NotFound: | ||||||
376 | case LookupResult::NotFoundInCurrentInstantiation: | ||||||
377 | if (CorrectedII) { | ||||||
378 | TypeNameValidatorCCC CCC(/*AllowInvalid=*/true, isClassName, | ||||||
379 | AllowDeducedTemplate); | ||||||
380 | TypoCorrection Correction = CorrectTypo(Result.getLookupNameInfo(), Kind, | ||||||
381 | S, SS, CCC, CTK_ErrorRecovery); | ||||||
382 | IdentifierInfo *NewII = Correction.getCorrectionAsIdentifierInfo(); | ||||||
383 | TemplateTy Template; | ||||||
384 | bool MemberOfUnknownSpecialization; | ||||||
385 | UnqualifiedId TemplateName; | ||||||
386 | TemplateName.setIdentifier(NewII, NameLoc); | ||||||
387 | NestedNameSpecifier *NNS = Correction.getCorrectionSpecifier(); | ||||||
388 | CXXScopeSpec NewSS, *NewSSPtr = SS; | ||||||
389 | if (SS && NNS) { | ||||||
390 | NewSS.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
391 | NewSSPtr = &NewSS; | ||||||
392 | } | ||||||
393 | if (Correction && (NNS || NewII != &II) && | ||||||
394 | // Ignore a correction to a template type as the to-be-corrected | ||||||
395 | // identifier is not a template (typo correction for template names | ||||||
396 | // is handled elsewhere). | ||||||
397 | !(getLangOpts().CPlusPlus && NewSSPtr && | ||||||
398 | isTemplateName(S, *NewSSPtr, false, TemplateName, nullptr, false, | ||||||
399 | Template, MemberOfUnknownSpecialization))) { | ||||||
400 | ParsedType Ty = getTypeName(*NewII, NameLoc, S, NewSSPtr, | ||||||
401 | isClassName, HasTrailingDot, ObjectTypePtr, | ||||||
402 | IsCtorOrDtorName, | ||||||
403 | WantNontrivialTypeSourceInfo, | ||||||
404 | IsClassTemplateDeductionContext); | ||||||
405 | if (Ty) { | ||||||
406 | diagnoseTypo(Correction, | ||||||
407 | PDiag(diag::err_unknown_type_or_class_name_suggest) | ||||||
408 | << Result.getLookupName() << isClassName); | ||||||
409 | if (SS && NNS) | ||||||
410 | SS->MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
411 | *CorrectedII = NewII; | ||||||
412 | return Ty; | ||||||
413 | } | ||||||
414 | } | ||||||
415 | } | ||||||
416 | // If typo correction failed or was not performed, fall through | ||||||
417 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
418 | case LookupResult::FoundOverloaded: | ||||||
419 | case LookupResult::FoundUnresolvedValue: | ||||||
420 | Result.suppressDiagnostics(); | ||||||
421 | return nullptr; | ||||||
422 | |||||||
423 | case LookupResult::Ambiguous: | ||||||
424 | // Recover from type-hiding ambiguities by hiding the type. We'll | ||||||
425 | // do the lookup again when looking for an object, and we can | ||||||
426 | // diagnose the error then. If we don't do this, then the error | ||||||
427 | // about hiding the type will be immediately followed by an error | ||||||
428 | // that only makes sense if the identifier was treated like a type. | ||||||
429 | if (Result.getAmbiguityKind() == LookupResult::AmbiguousTagHiding) { | ||||||
430 | Result.suppressDiagnostics(); | ||||||
431 | return nullptr; | ||||||
432 | } | ||||||
433 | |||||||
434 | // Look to see if we have a type anywhere in the list of results. | ||||||
435 | for (LookupResult::iterator Res = Result.begin(), ResEnd = Result.end(); | ||||||
436 | Res != ResEnd; ++Res) { | ||||||
437 | NamedDecl *RealRes = (*Res)->getUnderlyingDecl(); | ||||||
438 | if (isa<TypeDecl, ObjCInterfaceDecl, UnresolvedUsingIfExistsDecl>( | ||||||
439 | RealRes) || | ||||||
440 | (AllowDeducedTemplate && getAsTypeTemplateDecl(RealRes))) { | ||||||
441 | if (!IIDecl || | ||||||
442 | // Make the selection of the recovery decl deterministic. | ||||||
443 | RealRes->getLocation() < IIDecl->getLocation()) | ||||||
444 | IIDecl = RealRes; | ||||||
445 | } | ||||||
446 | } | ||||||
447 | |||||||
448 | if (!IIDecl) { | ||||||
449 | // None of the entities we found is a type, so there is no way | ||||||
450 | // to even assume that the result is a type. In this case, don't | ||||||
451 | // complain about the ambiguity. The parser will either try to | ||||||
452 | // perform this lookup again (e.g., as an object name), which | ||||||
453 | // will produce the ambiguity, or will complain that it expected | ||||||
454 | // a type name. | ||||||
455 | Result.suppressDiagnostics(); | ||||||
456 | return nullptr; | ||||||
457 | } | ||||||
458 | |||||||
459 | // We found a type within the ambiguous lookup; diagnose the | ||||||
460 | // ambiguity and then return that type. This might be the right | ||||||
461 | // answer, or it might not be, but it suppresses any attempt to | ||||||
462 | // perform the name lookup again. | ||||||
463 | break; | ||||||
464 | |||||||
465 | case LookupResult::Found: | ||||||
466 | IIDecl = Result.getFoundDecl(); | ||||||
467 | break; | ||||||
468 | } | ||||||
469 | |||||||
470 | assert(IIDecl && "Didn't find decl")(static_cast <bool> (IIDecl && "Didn't find decl" ) ? void (0) : __assert_fail ("IIDecl && \"Didn't find decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 470, __extension__ __PRETTY_FUNCTION__)); | ||||||
471 | |||||||
472 | QualType T; | ||||||
473 | if (TypeDecl *TD = dyn_cast<TypeDecl>(IIDecl)) { | ||||||
474 | // C++ [class.qual]p2: A lookup that would find the injected-class-name | ||||||
475 | // instead names the constructors of the class, except when naming a class. | ||||||
476 | // This is ill-formed when we're not actually forming a ctor or dtor name. | ||||||
477 | auto *LookupRD = dyn_cast_or_null<CXXRecordDecl>(LookupCtx); | ||||||
478 | auto *FoundRD = dyn_cast<CXXRecordDecl>(TD); | ||||||
479 | if (!isClassName && !IsCtorOrDtorName && LookupRD && FoundRD && | ||||||
480 | FoundRD->isInjectedClassName() && | ||||||
481 | declaresSameEntity(LookupRD, cast<Decl>(FoundRD->getParent()))) | ||||||
482 | Diag(NameLoc, diag::err_out_of_line_qualified_id_type_names_constructor) | ||||||
483 | << &II << /*Type*/1; | ||||||
484 | |||||||
485 | DiagnoseUseOfDecl(IIDecl, NameLoc); | ||||||
486 | |||||||
487 | T = Context.getTypeDeclType(TD); | ||||||
488 | MarkAnyDeclReferenced(TD->getLocation(), TD, /*OdrUse=*/false); | ||||||
489 | } else if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(IIDecl)) { | ||||||
490 | (void)DiagnoseUseOfDecl(IDecl, NameLoc); | ||||||
491 | if (!HasTrailingDot) | ||||||
492 | T = Context.getObjCInterfaceType(IDecl); | ||||||
493 | } else if (auto *UD = dyn_cast<UnresolvedUsingIfExistsDecl>(IIDecl)) { | ||||||
494 | (void)DiagnoseUseOfDecl(UD, NameLoc); | ||||||
495 | // Recover with 'int' | ||||||
496 | T = Context.IntTy; | ||||||
497 | } else if (AllowDeducedTemplate) { | ||||||
498 | if (auto *TD = getAsTypeTemplateDecl(IIDecl)) | ||||||
499 | T = Context.getDeducedTemplateSpecializationType(TemplateName(TD), | ||||||
500 | QualType(), false); | ||||||
501 | } | ||||||
502 | |||||||
503 | if (T.isNull()) { | ||||||
504 | // If it's not plausibly a type, suppress diagnostics. | ||||||
505 | Result.suppressDiagnostics(); | ||||||
506 | return nullptr; | ||||||
507 | } | ||||||
508 | |||||||
509 | // NOTE: avoid constructing an ElaboratedType(Loc) if this is a | ||||||
510 | // constructor or destructor name (in such a case, the scope specifier | ||||||
511 | // will be attached to the enclosing Expr or Decl node). | ||||||
512 | if (SS && SS->isNotEmpty() && !IsCtorOrDtorName && | ||||||
513 | !isa<ObjCInterfaceDecl, UnresolvedUsingIfExistsDecl>(IIDecl)) { | ||||||
514 | if (WantNontrivialTypeSourceInfo) { | ||||||
515 | // Construct a type with type-source information. | ||||||
516 | TypeLocBuilder Builder; | ||||||
517 | Builder.pushTypeSpec(T).setNameLoc(NameLoc); | ||||||
518 | |||||||
519 | T = getElaboratedType(ETK_None, *SS, T); | ||||||
520 | ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T); | ||||||
521 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
522 | ElabTL.setQualifierLoc(SS->getWithLocInContext(Context)); | ||||||
523 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
524 | } else { | ||||||
525 | T = getElaboratedType(ETK_None, *SS, T); | ||||||
526 | } | ||||||
527 | } | ||||||
528 | |||||||
529 | return ParsedType::make(T); | ||||||
530 | } | ||||||
531 | |||||||
532 | // Builds a fake NNS for the given decl context. | ||||||
533 | static NestedNameSpecifier * | ||||||
534 | synthesizeCurrentNestedNameSpecifier(ASTContext &Context, DeclContext *DC) { | ||||||
535 | for (;; DC = DC->getLookupParent()) { | ||||||
536 | DC = DC->getPrimaryContext(); | ||||||
537 | auto *ND = dyn_cast<NamespaceDecl>(DC); | ||||||
538 | if (ND && !ND->isInline() && !ND->isAnonymousNamespace()) | ||||||
539 | return NestedNameSpecifier::Create(Context, nullptr, ND); | ||||||
540 | else if (auto *RD = dyn_cast<CXXRecordDecl>(DC)) | ||||||
541 | return NestedNameSpecifier::Create(Context, nullptr, RD->isTemplateDecl(), | ||||||
542 | RD->getTypeForDecl()); | ||||||
543 | else if (isa<TranslationUnitDecl>(DC)) | ||||||
544 | return NestedNameSpecifier::GlobalSpecifier(Context); | ||||||
545 | } | ||||||
546 | llvm_unreachable("something isn't in TU scope?")::llvm::llvm_unreachable_internal("something isn't in TU scope?" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 546); | ||||||
547 | } | ||||||
548 | |||||||
549 | /// Find the parent class with dependent bases of the innermost enclosing method | ||||||
550 | /// context. Do not look for enclosing CXXRecordDecls directly, or we will end | ||||||
551 | /// up allowing unqualified dependent type names at class-level, which MSVC | ||||||
552 | /// correctly rejects. | ||||||
553 | static const CXXRecordDecl * | ||||||
554 | findRecordWithDependentBasesOfEnclosingMethod(const DeclContext *DC) { | ||||||
555 | for (; DC && DC->isDependentContext(); DC = DC->getLookupParent()) { | ||||||
556 | DC = DC->getPrimaryContext(); | ||||||
557 | if (const auto *MD = dyn_cast<CXXMethodDecl>(DC)) | ||||||
558 | if (MD->getParent()->hasAnyDependentBases()) | ||||||
559 | return MD->getParent(); | ||||||
560 | } | ||||||
561 | return nullptr; | ||||||
562 | } | ||||||
563 | |||||||
564 | ParsedType Sema::ActOnMSVCUnknownTypeName(const IdentifierInfo &II, | ||||||
565 | SourceLocation NameLoc, | ||||||
566 | bool IsTemplateTypeArg) { | ||||||
567 | assert(getLangOpts().MSVCCompat && "shouldn't be called in non-MSVC mode")(static_cast <bool> (getLangOpts().MSVCCompat && "shouldn't be called in non-MSVC mode") ? void (0) : __assert_fail ("getLangOpts().MSVCCompat && \"shouldn't be called in non-MSVC mode\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 567, __extension__ __PRETTY_FUNCTION__)); | ||||||
568 | |||||||
569 | NestedNameSpecifier *NNS = nullptr; | ||||||
570 | if (IsTemplateTypeArg && getCurScope()->isTemplateParamScope()) { | ||||||
571 | // If we weren't able to parse a default template argument, delay lookup | ||||||
572 | // until instantiation time by making a non-dependent DependentTypeName. We | ||||||
573 | // pretend we saw a NestedNameSpecifier referring to the current scope, and | ||||||
574 | // lookup is retried. | ||||||
575 | // FIXME: This hurts our diagnostic quality, since we get errors like "no | ||||||
576 | // type named 'Foo' in 'current_namespace'" when the user didn't write any | ||||||
577 | // name specifiers. | ||||||
578 | NNS = synthesizeCurrentNestedNameSpecifier(Context, CurContext); | ||||||
579 | Diag(NameLoc, diag::ext_ms_delayed_template_argument) << &II; | ||||||
580 | } else if (const CXXRecordDecl *RD = | ||||||
581 | findRecordWithDependentBasesOfEnclosingMethod(CurContext)) { | ||||||
582 | // Build a DependentNameType that will perform lookup into RD at | ||||||
583 | // instantiation time. | ||||||
584 | NNS = NestedNameSpecifier::Create(Context, nullptr, RD->isTemplateDecl(), | ||||||
585 | RD->getTypeForDecl()); | ||||||
586 | |||||||
587 | // Diagnose that this identifier was undeclared, and retry the lookup during | ||||||
588 | // template instantiation. | ||||||
589 | Diag(NameLoc, diag::ext_undeclared_unqual_id_with_dependent_base) << &II | ||||||
590 | << RD; | ||||||
591 | } else { | ||||||
592 | // This is not a situation that we should recover from. | ||||||
593 | return ParsedType(); | ||||||
594 | } | ||||||
595 | |||||||
596 | QualType T = Context.getDependentNameType(ETK_None, NNS, &II); | ||||||
597 | |||||||
598 | // Build type location information. We synthesized the qualifier, so we have | ||||||
599 | // to build a fake NestedNameSpecifierLoc. | ||||||
600 | NestedNameSpecifierLocBuilder NNSLocBuilder; | ||||||
601 | NNSLocBuilder.MakeTrivial(Context, NNS, SourceRange(NameLoc)); | ||||||
602 | NestedNameSpecifierLoc QualifierLoc = NNSLocBuilder.getWithLocInContext(Context); | ||||||
603 | |||||||
604 | TypeLocBuilder Builder; | ||||||
605 | DependentNameTypeLoc DepTL = Builder.push<DependentNameTypeLoc>(T); | ||||||
606 | DepTL.setNameLoc(NameLoc); | ||||||
607 | DepTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
608 | DepTL.setQualifierLoc(QualifierLoc); | ||||||
609 | return CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
610 | } | ||||||
611 | |||||||
612 | /// isTagName() - This method is called *for error recovery purposes only* | ||||||
613 | /// to determine if the specified name is a valid tag name ("struct foo"). If | ||||||
614 | /// so, this returns the TST for the tag corresponding to it (TST_enum, | ||||||
615 | /// TST_union, TST_struct, TST_interface, TST_class). This is used to diagnose | ||||||
616 | /// cases in C where the user forgot to specify the tag. | ||||||
617 | DeclSpec::TST Sema::isTagName(IdentifierInfo &II, Scope *S) { | ||||||
618 | // Do a tag name lookup in this scope. | ||||||
619 | LookupResult R(*this, &II, SourceLocation(), LookupTagName); | ||||||
620 | LookupName(R, S, false); | ||||||
621 | R.suppressDiagnostics(); | ||||||
622 | if (R.getResultKind() == LookupResult::Found) | ||||||
623 | if (const TagDecl *TD = R.getAsSingle<TagDecl>()) { | ||||||
624 | switch (TD->getTagKind()) { | ||||||
625 | case TTK_Struct: return DeclSpec::TST_struct; | ||||||
626 | case TTK_Interface: return DeclSpec::TST_interface; | ||||||
627 | case TTK_Union: return DeclSpec::TST_union; | ||||||
628 | case TTK_Class: return DeclSpec::TST_class; | ||||||
629 | case TTK_Enum: return DeclSpec::TST_enum; | ||||||
630 | } | ||||||
631 | } | ||||||
632 | |||||||
633 | return DeclSpec::TST_unspecified; | ||||||
634 | } | ||||||
635 | |||||||
636 | /// isMicrosoftMissingTypename - In Microsoft mode, within class scope, | ||||||
637 | /// if a CXXScopeSpec's type is equal to the type of one of the base classes | ||||||
638 | /// then downgrade the missing typename error to a warning. | ||||||
639 | /// This is needed for MSVC compatibility; Example: | ||||||
640 | /// @code | ||||||
641 | /// template<class T> class A { | ||||||
642 | /// public: | ||||||
643 | /// typedef int TYPE; | ||||||
644 | /// }; | ||||||
645 | /// template<class T> class B : public A<T> { | ||||||
646 | /// public: | ||||||
647 | /// A<T>::TYPE a; // no typename required because A<T> is a base class. | ||||||
648 | /// }; | ||||||
649 | /// @endcode | ||||||
650 | bool Sema::isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S) { | ||||||
651 | if (CurContext->isRecord()) { | ||||||
652 | if (SS->getScopeRep()->getKind() == NestedNameSpecifier::Super) | ||||||
653 | return true; | ||||||
654 | |||||||
655 | const Type *Ty = SS->getScopeRep()->getAsType(); | ||||||
656 | |||||||
657 | CXXRecordDecl *RD = cast<CXXRecordDecl>(CurContext); | ||||||
658 | for (const auto &Base : RD->bases()) | ||||||
659 | if (Ty && Context.hasSameUnqualifiedType(QualType(Ty, 1), Base.getType())) | ||||||
660 | return true; | ||||||
661 | return S->isFunctionPrototypeScope(); | ||||||
662 | } | ||||||
663 | return CurContext->isFunctionOrMethod() || S->isFunctionPrototypeScope(); | ||||||
664 | } | ||||||
665 | |||||||
666 | void Sema::DiagnoseUnknownTypeName(IdentifierInfo *&II, | ||||||
667 | SourceLocation IILoc, | ||||||
668 | Scope *S, | ||||||
669 | CXXScopeSpec *SS, | ||||||
670 | ParsedType &SuggestedType, | ||||||
671 | bool IsTemplateName) { | ||||||
672 | // Don't report typename errors for editor placeholders. | ||||||
673 | if (II->isEditorPlaceholder()) | ||||||
674 | return; | ||||||
675 | // We don't have anything to suggest (yet). | ||||||
676 | SuggestedType = nullptr; | ||||||
677 | |||||||
678 | // There may have been a typo in the name of the type. Look up typo | ||||||
679 | // results, in case we have something that we can suggest. | ||||||
680 | TypeNameValidatorCCC CCC(/*AllowInvalid=*/false, /*WantClass=*/false, | ||||||
681 | /*AllowTemplates=*/IsTemplateName, | ||||||
682 | /*AllowNonTemplates=*/!IsTemplateName); | ||||||
683 | if (TypoCorrection Corrected = | ||||||
684 | CorrectTypo(DeclarationNameInfo(II, IILoc), LookupOrdinaryName, S, SS, | ||||||
685 | CCC, CTK_ErrorRecovery)) { | ||||||
686 | // FIXME: Support error recovery for the template-name case. | ||||||
687 | bool CanRecover = !IsTemplateName; | ||||||
688 | if (Corrected.isKeyword()) { | ||||||
689 | // We corrected to a keyword. | ||||||
690 | diagnoseTypo(Corrected, | ||||||
691 | PDiag(IsTemplateName ? diag::err_no_template_suggest | ||||||
692 | : diag::err_unknown_typename_suggest) | ||||||
693 | << II); | ||||||
694 | II = Corrected.getCorrectionAsIdentifierInfo(); | ||||||
695 | } else { | ||||||
696 | // We found a similarly-named type or interface; suggest that. | ||||||
697 | if (!SS || !SS->isSet()) { | ||||||
698 | diagnoseTypo(Corrected, | ||||||
699 | PDiag(IsTemplateName ? diag::err_no_template_suggest | ||||||
700 | : diag::err_unknown_typename_suggest) | ||||||
701 | << II, CanRecover); | ||||||
702 | } else if (DeclContext *DC = computeDeclContext(*SS, false)) { | ||||||
703 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | ||||||
704 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||||
705 | II->getName().equals(CorrectedStr); | ||||||
706 | diagnoseTypo(Corrected, | ||||||
707 | PDiag(IsTemplateName | ||||||
708 | ? diag::err_no_member_template_suggest | ||||||
709 | : diag::err_unknown_nested_typename_suggest) | ||||||
710 | << II << DC << DroppedSpecifier << SS->getRange(), | ||||||
711 | CanRecover); | ||||||
712 | } else { | ||||||
713 | llvm_unreachable("could not have corrected a typo here")::llvm::llvm_unreachable_internal("could not have corrected a typo here" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 713); | ||||||
714 | } | ||||||
715 | |||||||
716 | if (!CanRecover) | ||||||
717 | return; | ||||||
718 | |||||||
719 | CXXScopeSpec tmpSS; | ||||||
720 | if (Corrected.getCorrectionSpecifier()) | ||||||
721 | tmpSS.MakeTrivial(Context, Corrected.getCorrectionSpecifier(), | ||||||
722 | SourceRange(IILoc)); | ||||||
723 | // FIXME: Support class template argument deduction here. | ||||||
724 | SuggestedType = | ||||||
725 | getTypeName(*Corrected.getCorrectionAsIdentifierInfo(), IILoc, S, | ||||||
726 | tmpSS.isSet() ? &tmpSS : SS, false, false, nullptr, | ||||||
727 | /*IsCtorOrDtorName=*/false, | ||||||
728 | /*WantNontrivialTypeSourceInfo=*/true); | ||||||
729 | } | ||||||
730 | return; | ||||||
731 | } | ||||||
732 | |||||||
733 | if (getLangOpts().CPlusPlus && !IsTemplateName) { | ||||||
734 | // See if II is a class template that the user forgot to pass arguments to. | ||||||
735 | UnqualifiedId Name; | ||||||
736 | Name.setIdentifier(II, IILoc); | ||||||
737 | CXXScopeSpec EmptySS; | ||||||
738 | TemplateTy TemplateResult; | ||||||
739 | bool MemberOfUnknownSpecialization; | ||||||
740 | if (isTemplateName(S, SS ? *SS : EmptySS, /*hasTemplateKeyword=*/false, | ||||||
741 | Name, nullptr, true, TemplateResult, | ||||||
742 | MemberOfUnknownSpecialization) == TNK_Type_template) { | ||||||
743 | diagnoseMissingTemplateArguments(TemplateResult.get(), IILoc); | ||||||
744 | return; | ||||||
745 | } | ||||||
746 | } | ||||||
747 | |||||||
748 | // FIXME: Should we move the logic that tries to recover from a missing tag | ||||||
749 | // (struct, union, enum) from Parser::ParseImplicitInt here, instead? | ||||||
750 | |||||||
751 | if (!SS || (!SS->isSet() && !SS->isInvalid())) | ||||||
752 | Diag(IILoc, IsTemplateName ? diag::err_no_template | ||||||
753 | : diag::err_unknown_typename) | ||||||
754 | << II; | ||||||
755 | else if (DeclContext *DC = computeDeclContext(*SS, false)) | ||||||
756 | Diag(IILoc, IsTemplateName ? diag::err_no_member_template | ||||||
757 | : diag::err_typename_nested_not_found) | ||||||
758 | << II << DC << SS->getRange(); | ||||||
759 | else if (SS->isValid() && SS->getScopeRep()->containsErrors()) { | ||||||
760 | SuggestedType = | ||||||
761 | ActOnTypenameType(S, SourceLocation(), *SS, *II, IILoc).get(); | ||||||
762 | } else if (isDependentScopeSpecifier(*SS)) { | ||||||
763 | unsigned DiagID = diag::err_typename_missing; | ||||||
764 | if (getLangOpts().MSVCCompat && isMicrosoftMissingTypename(SS, S)) | ||||||
765 | DiagID = diag::ext_typename_missing; | ||||||
766 | |||||||
767 | Diag(SS->getRange().getBegin(), DiagID) | ||||||
768 | << SS->getScopeRep() << II->getName() | ||||||
769 | << SourceRange(SS->getRange().getBegin(), IILoc) | ||||||
770 | << FixItHint::CreateInsertion(SS->getRange().getBegin(), "typename "); | ||||||
771 | SuggestedType = ActOnTypenameType(S, SourceLocation(), | ||||||
772 | *SS, *II, IILoc).get(); | ||||||
773 | } else { | ||||||
774 | assert(SS && SS->isInvalid() &&(static_cast <bool> (SS && SS->isInvalid() && "Invalid scope specifier has already been diagnosed") ? void (0) : __assert_fail ("SS && SS->isInvalid() && \"Invalid scope specifier has already been diagnosed\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 775, __extension__ __PRETTY_FUNCTION__)) | ||||||
775 | "Invalid scope specifier has already been diagnosed")(static_cast <bool> (SS && SS->isInvalid() && "Invalid scope specifier has already been diagnosed") ? void (0) : __assert_fail ("SS && SS->isInvalid() && \"Invalid scope specifier has already been diagnosed\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 775, __extension__ __PRETTY_FUNCTION__)); | ||||||
776 | } | ||||||
777 | } | ||||||
778 | |||||||
779 | /// Determine whether the given result set contains either a type name | ||||||
780 | /// or | ||||||
781 | static bool isResultTypeOrTemplate(LookupResult &R, const Token &NextToken) { | ||||||
782 | bool CheckTemplate = R.getSema().getLangOpts().CPlusPlus && | ||||||
783 | NextToken.is(tok::less); | ||||||
784 | |||||||
785 | for (LookupResult::iterator I = R.begin(), IEnd = R.end(); I != IEnd; ++I) { | ||||||
786 | if (isa<TypeDecl>(*I) || isa<ObjCInterfaceDecl>(*I)) | ||||||
787 | return true; | ||||||
788 | |||||||
789 | if (CheckTemplate && isa<TemplateDecl>(*I)) | ||||||
790 | return true; | ||||||
791 | } | ||||||
792 | |||||||
793 | return false; | ||||||
794 | } | ||||||
795 | |||||||
796 | static bool isTagTypeWithMissingTag(Sema &SemaRef, LookupResult &Result, | ||||||
797 | Scope *S, CXXScopeSpec &SS, | ||||||
798 | IdentifierInfo *&Name, | ||||||
799 | SourceLocation NameLoc) { | ||||||
800 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupTagName); | ||||||
801 | SemaRef.LookupParsedName(R, S, &SS); | ||||||
802 | if (TagDecl *Tag = R.getAsSingle<TagDecl>()) { | ||||||
803 | StringRef FixItTagName; | ||||||
804 | switch (Tag->getTagKind()) { | ||||||
805 | case TTK_Class: | ||||||
806 | FixItTagName = "class "; | ||||||
807 | break; | ||||||
808 | |||||||
809 | case TTK_Enum: | ||||||
810 | FixItTagName = "enum "; | ||||||
811 | break; | ||||||
812 | |||||||
813 | case TTK_Struct: | ||||||
814 | FixItTagName = "struct "; | ||||||
815 | break; | ||||||
816 | |||||||
817 | case TTK_Interface: | ||||||
818 | FixItTagName = "__interface "; | ||||||
819 | break; | ||||||
820 | |||||||
821 | case TTK_Union: | ||||||
822 | FixItTagName = "union "; | ||||||
823 | break; | ||||||
824 | } | ||||||
825 | |||||||
826 | StringRef TagName = FixItTagName.drop_back(); | ||||||
827 | SemaRef.Diag(NameLoc, diag::err_use_of_tag_name_without_tag) | ||||||
828 | << Name << TagName << SemaRef.getLangOpts().CPlusPlus | ||||||
829 | << FixItHint::CreateInsertion(NameLoc, FixItTagName); | ||||||
830 | |||||||
831 | for (LookupResult::iterator I = Result.begin(), IEnd = Result.end(); | ||||||
832 | I != IEnd; ++I) | ||||||
833 | SemaRef.Diag((*I)->getLocation(), diag::note_decl_hiding_tag_type) | ||||||
834 | << Name << TagName; | ||||||
835 | |||||||
836 | // Replace lookup results with just the tag decl. | ||||||
837 | Result.clear(Sema::LookupTagName); | ||||||
838 | SemaRef.LookupParsedName(Result, S, &SS); | ||||||
839 | return true; | ||||||
840 | } | ||||||
841 | |||||||
842 | return false; | ||||||
843 | } | ||||||
844 | |||||||
845 | /// Build a ParsedType for a simple-type-specifier with a nested-name-specifier. | ||||||
846 | static ParsedType buildNestedType(Sema &S, CXXScopeSpec &SS, | ||||||
847 | QualType T, SourceLocation NameLoc) { | ||||||
848 | ASTContext &Context = S.Context; | ||||||
849 | |||||||
850 | TypeLocBuilder Builder; | ||||||
851 | Builder.pushTypeSpec(T).setNameLoc(NameLoc); | ||||||
852 | |||||||
853 | T = S.getElaboratedType(ETK_None, SS, T); | ||||||
854 | ElaboratedTypeLoc ElabTL = Builder.push<ElaboratedTypeLoc>(T); | ||||||
855 | ElabTL.setElaboratedKeywordLoc(SourceLocation()); | ||||||
856 | ElabTL.setQualifierLoc(SS.getWithLocInContext(Context)); | ||||||
857 | return S.CreateParsedType(T, Builder.getTypeSourceInfo(Context, T)); | ||||||
858 | } | ||||||
859 | |||||||
860 | Sema::NameClassification Sema::ClassifyName(Scope *S, CXXScopeSpec &SS, | ||||||
861 | IdentifierInfo *&Name, | ||||||
862 | SourceLocation NameLoc, | ||||||
863 | const Token &NextToken, | ||||||
864 | CorrectionCandidateCallback *CCC) { | ||||||
865 | DeclarationNameInfo NameInfo(Name, NameLoc); | ||||||
866 | ObjCMethodDecl *CurMethod = getCurMethodDecl(); | ||||||
867 | |||||||
868 | assert(NextToken.isNot(tok::coloncolon) &&(static_cast <bool> (NextToken.isNot(tok::coloncolon) && "parse nested name specifiers before calling ClassifyName") ? void (0) : __assert_fail ("NextToken.isNot(tok::coloncolon) && \"parse nested name specifiers before calling ClassifyName\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 869, __extension__ __PRETTY_FUNCTION__)) | ||||||
869 | "parse nested name specifiers before calling ClassifyName")(static_cast <bool> (NextToken.isNot(tok::coloncolon) && "parse nested name specifiers before calling ClassifyName") ? void (0) : __assert_fail ("NextToken.isNot(tok::coloncolon) && \"parse nested name specifiers before calling ClassifyName\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 869, __extension__ __PRETTY_FUNCTION__)); | ||||||
870 | if (getLangOpts().CPlusPlus && SS.isSet() && | ||||||
871 | isCurrentClassName(*Name, S, &SS)) { | ||||||
872 | // Per [class.qual]p2, this names the constructors of SS, not the | ||||||
873 | // injected-class-name. We don't have a classification for that. | ||||||
874 | // There's not much point caching this result, since the parser | ||||||
875 | // will reject it later. | ||||||
876 | return NameClassification::Unknown(); | ||||||
877 | } | ||||||
878 | |||||||
879 | LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName); | ||||||
880 | LookupParsedName(Result, S, &SS, !CurMethod); | ||||||
881 | |||||||
882 | if (SS.isInvalid()) | ||||||
883 | return NameClassification::Error(); | ||||||
884 | |||||||
885 | // For unqualified lookup in a class template in MSVC mode, look into | ||||||
886 | // dependent base classes where the primary class template is known. | ||||||
887 | if (Result.empty() && SS.isEmpty() && getLangOpts().MSVCCompat) { | ||||||
888 | if (ParsedType TypeInBase = | ||||||
889 | recoverFromTypeInKnownDependentBase(*this, *Name, NameLoc)) | ||||||
890 | return TypeInBase; | ||||||
891 | } | ||||||
892 | |||||||
893 | // Perform lookup for Objective-C instance variables (including automatically | ||||||
894 | // synthesized instance variables), if we're in an Objective-C method. | ||||||
895 | // FIXME: This lookup really, really needs to be folded in to the normal | ||||||
896 | // unqualified lookup mechanism. | ||||||
897 | if (SS.isEmpty() && CurMethod && !isResultTypeOrTemplate(Result, NextToken)) { | ||||||
898 | DeclResult Ivar = LookupIvarInObjCMethod(Result, S, Name); | ||||||
899 | if (Ivar.isInvalid()) | ||||||
900 | return NameClassification::Error(); | ||||||
901 | if (Ivar.isUsable()) | ||||||
902 | return NameClassification::NonType(cast<NamedDecl>(Ivar.get())); | ||||||
903 | |||||||
904 | // We defer builtin creation until after ivar lookup inside ObjC methods. | ||||||
905 | if (Result.empty()) | ||||||
906 | LookupBuiltin(Result); | ||||||
907 | } | ||||||
908 | |||||||
909 | bool SecondTry = false; | ||||||
910 | bool IsFilteredTemplateName = false; | ||||||
911 | |||||||
912 | Corrected: | ||||||
913 | switch (Result.getResultKind()) { | ||||||
914 | case LookupResult::NotFound: | ||||||
915 | // If an unqualified-id is followed by a '(', then we have a function | ||||||
916 | // call. | ||||||
917 | if (SS.isEmpty() && NextToken.is(tok::l_paren)) { | ||||||
918 | // In C++, this is an ADL-only call. | ||||||
919 | // FIXME: Reference? | ||||||
920 | if (getLangOpts().CPlusPlus) | ||||||
921 | return NameClassification::UndeclaredNonType(); | ||||||
922 | |||||||
923 | // C90 6.3.2.2: | ||||||
924 | // If the expression that precedes the parenthesized argument list in a | ||||||
925 | // function call consists solely of an identifier, and if no | ||||||
926 | // declaration is visible for this identifier, the identifier is | ||||||
927 | // implicitly declared exactly as if, in the innermost block containing | ||||||
928 | // the function call, the declaration | ||||||
929 | // | ||||||
930 | // extern int identifier (); | ||||||
931 | // | ||||||
932 | // appeared. | ||||||
933 | // | ||||||
934 | // We also allow this in C99 as an extension. | ||||||
935 | if (NamedDecl *D = ImplicitlyDefineFunction(NameLoc, *Name, S)) | ||||||
936 | return NameClassification::NonType(D); | ||||||
937 | } | ||||||
938 | |||||||
939 | if (getLangOpts().CPlusPlus20 && SS.isEmpty() && NextToken.is(tok::less)) { | ||||||
940 | // In C++20 onwards, this could be an ADL-only call to a function | ||||||
941 | // template, and we're required to assume that this is a template name. | ||||||
942 | // | ||||||
943 | // FIXME: Find a way to still do typo correction in this case. | ||||||
944 | TemplateName Template = | ||||||
945 | Context.getAssumedTemplateName(NameInfo.getName()); | ||||||
946 | return NameClassification::UndeclaredTemplate(Template); | ||||||
947 | } | ||||||
948 | |||||||
949 | // In C, we first see whether there is a tag type by the same name, in | ||||||
950 | // which case it's likely that the user just forgot to write "enum", | ||||||
951 | // "struct", or "union". | ||||||
952 | if (!getLangOpts().CPlusPlus && !SecondTry && | ||||||
953 | isTagTypeWithMissingTag(*this, Result, S, SS, Name, NameLoc)) { | ||||||
954 | break; | ||||||
955 | } | ||||||
956 | |||||||
957 | // Perform typo correction to determine if there is another name that is | ||||||
958 | // close to this name. | ||||||
959 | if (!SecondTry && CCC) { | ||||||
960 | SecondTry = true; | ||||||
961 | if (TypoCorrection Corrected = | ||||||
962 | CorrectTypo(Result.getLookupNameInfo(), Result.getLookupKind(), S, | ||||||
963 | &SS, *CCC, CTK_ErrorRecovery)) { | ||||||
964 | unsigned UnqualifiedDiag = diag::err_undeclared_var_use_suggest; | ||||||
965 | unsigned QualifiedDiag = diag::err_no_member_suggest; | ||||||
966 | |||||||
967 | NamedDecl *FirstDecl = Corrected.getFoundDecl(); | ||||||
968 | NamedDecl *UnderlyingFirstDecl = Corrected.getCorrectionDecl(); | ||||||
969 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
970 | UnderlyingFirstDecl && isa<TemplateDecl>(UnderlyingFirstDecl)) { | ||||||
971 | UnqualifiedDiag = diag::err_no_template_suggest; | ||||||
972 | QualifiedDiag = diag::err_no_member_template_suggest; | ||||||
973 | } else if (UnderlyingFirstDecl && | ||||||
974 | (isa<TypeDecl>(UnderlyingFirstDecl) || | ||||||
975 | isa<ObjCInterfaceDecl>(UnderlyingFirstDecl) || | ||||||
976 | isa<ObjCCompatibleAliasDecl>(UnderlyingFirstDecl))) { | ||||||
977 | UnqualifiedDiag = diag::err_unknown_typename_suggest; | ||||||
978 | QualifiedDiag = diag::err_unknown_nested_typename_suggest; | ||||||
979 | } | ||||||
980 | |||||||
981 | if (SS.isEmpty()) { | ||||||
982 | diagnoseTypo(Corrected, PDiag(UnqualifiedDiag) << Name); | ||||||
983 | } else {// FIXME: is this even reachable? Test it. | ||||||
984 | std::string CorrectedStr(Corrected.getAsString(getLangOpts())); | ||||||
985 | bool DroppedSpecifier = Corrected.WillReplaceSpecifier() && | ||||||
986 | Name->getName().equals(CorrectedStr); | ||||||
987 | diagnoseTypo(Corrected, PDiag(QualifiedDiag) | ||||||
988 | << Name << computeDeclContext(SS, false) | ||||||
989 | << DroppedSpecifier << SS.getRange()); | ||||||
990 | } | ||||||
991 | |||||||
992 | // Update the name, so that the caller has the new name. | ||||||
993 | Name = Corrected.getCorrectionAsIdentifierInfo(); | ||||||
994 | |||||||
995 | // Typo correction corrected to a keyword. | ||||||
996 | if (Corrected.isKeyword()) | ||||||
997 | return Name; | ||||||
998 | |||||||
999 | // Also update the LookupResult... | ||||||
1000 | // FIXME: This should probably go away at some point | ||||||
1001 | Result.clear(); | ||||||
1002 | Result.setLookupName(Corrected.getCorrection()); | ||||||
1003 | if (FirstDecl) | ||||||
1004 | Result.addDecl(FirstDecl); | ||||||
1005 | |||||||
1006 | // If we found an Objective-C instance variable, let | ||||||
1007 | // LookupInObjCMethod build the appropriate expression to | ||||||
1008 | // reference the ivar. | ||||||
1009 | // FIXME: This is a gross hack. | ||||||
1010 | if (ObjCIvarDecl *Ivar = Result.getAsSingle<ObjCIvarDecl>()) { | ||||||
1011 | DeclResult R = | ||||||
1012 | LookupIvarInObjCMethod(Result, S, Ivar->getIdentifier()); | ||||||
1013 | if (R.isInvalid()) | ||||||
1014 | return NameClassification::Error(); | ||||||
1015 | if (R.isUsable()) | ||||||
1016 | return NameClassification::NonType(Ivar); | ||||||
1017 | } | ||||||
1018 | |||||||
1019 | goto Corrected; | ||||||
1020 | } | ||||||
1021 | } | ||||||
1022 | |||||||
1023 | // We failed to correct; just fall through and let the parser deal with it. | ||||||
1024 | Result.suppressDiagnostics(); | ||||||
1025 | return NameClassification::Unknown(); | ||||||
1026 | |||||||
1027 | case LookupResult::NotFoundInCurrentInstantiation: { | ||||||
1028 | // We performed name lookup into the current instantiation, and there were | ||||||
1029 | // dependent bases, so we treat this result the same way as any other | ||||||
1030 | // dependent nested-name-specifier. | ||||||
1031 | |||||||
1032 | // C++ [temp.res]p2: | ||||||
1033 | // A name used in a template declaration or definition and that is | ||||||
1034 | // dependent on a template-parameter is assumed not to name a type | ||||||
1035 | // unless the applicable name lookup finds a type name or the name is | ||||||
1036 | // qualified by the keyword typename. | ||||||
1037 | // | ||||||
1038 | // FIXME: If the next token is '<', we might want to ask the parser to | ||||||
1039 | // perform some heroics to see if we actually have a | ||||||
1040 | // template-argument-list, which would indicate a missing 'template' | ||||||
1041 | // keyword here. | ||||||
1042 | return NameClassification::DependentNonType(); | ||||||
1043 | } | ||||||
1044 | |||||||
1045 | case LookupResult::Found: | ||||||
1046 | case LookupResult::FoundOverloaded: | ||||||
1047 | case LookupResult::FoundUnresolvedValue: | ||||||
1048 | break; | ||||||
1049 | |||||||
1050 | case LookupResult::Ambiguous: | ||||||
1051 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
1052 | hasAnyAcceptableTemplateNames(Result, /*AllowFunctionTemplates=*/true, | ||||||
1053 | /*AllowDependent=*/false)) { | ||||||
1054 | // C++ [temp.local]p3: | ||||||
1055 | // A lookup that finds an injected-class-name (10.2) can result in an | ||||||
1056 | // ambiguity in certain cases (for example, if it is found in more than | ||||||
1057 | // one base class). If all of the injected-class-names that are found | ||||||
1058 | // refer to specializations of the same class template, and if the name | ||||||
1059 | // is followed by a template-argument-list, the reference refers to the | ||||||
1060 | // class template itself and not a specialization thereof, and is not | ||||||
1061 | // ambiguous. | ||||||
1062 | // | ||||||
1063 | // This filtering can make an ambiguous result into an unambiguous one, | ||||||
1064 | // so try again after filtering out template names. | ||||||
1065 | FilterAcceptableTemplateNames(Result); | ||||||
1066 | if (!Result.isAmbiguous()) { | ||||||
1067 | IsFilteredTemplateName = true; | ||||||
1068 | break; | ||||||
1069 | } | ||||||
1070 | } | ||||||
1071 | |||||||
1072 | // Diagnose the ambiguity and return an error. | ||||||
1073 | return NameClassification::Error(); | ||||||
1074 | } | ||||||
1075 | |||||||
1076 | if (getLangOpts().CPlusPlus && NextToken.is(tok::less) && | ||||||
1077 | (IsFilteredTemplateName || | ||||||
1078 | hasAnyAcceptableTemplateNames( | ||||||
1079 | Result, /*AllowFunctionTemplates=*/true, | ||||||
1080 | /*AllowDependent=*/false, | ||||||
1081 | /*AllowNonTemplateFunctions*/ SS.isEmpty() && | ||||||
1082 | getLangOpts().CPlusPlus20))) { | ||||||
1083 | // C++ [temp.names]p3: | ||||||
1084 | // After name lookup (3.4) finds that a name is a template-name or that | ||||||
1085 | // an operator-function-id or a literal- operator-id refers to a set of | ||||||
1086 | // overloaded functions any member of which is a function template if | ||||||
1087 | // this is followed by a <, the < is always taken as the delimiter of a | ||||||
1088 | // template-argument-list and never as the less-than operator. | ||||||
1089 | // C++2a [temp.names]p2: | ||||||
1090 | // A name is also considered to refer to a template if it is an | ||||||
1091 | // unqualified-id followed by a < and name lookup finds either one | ||||||
1092 | // or more functions or finds nothing. | ||||||
1093 | if (!IsFilteredTemplateName) | ||||||
1094 | FilterAcceptableTemplateNames(Result); | ||||||
1095 | |||||||
1096 | bool IsFunctionTemplate; | ||||||
1097 | bool IsVarTemplate; | ||||||
1098 | TemplateName Template; | ||||||
1099 | if (Result.end() - Result.begin() > 1) { | ||||||
1100 | IsFunctionTemplate = true; | ||||||
1101 | Template = Context.getOverloadedTemplateName(Result.begin(), | ||||||
1102 | Result.end()); | ||||||
1103 | } else if (!Result.empty()) { | ||||||
1104 | auto *TD = cast<TemplateDecl>(getAsTemplateNameDecl( | ||||||
1105 | *Result.begin(), /*AllowFunctionTemplates=*/true, | ||||||
1106 | /*AllowDependent=*/false)); | ||||||
1107 | IsFunctionTemplate = isa<FunctionTemplateDecl>(TD); | ||||||
1108 | IsVarTemplate = isa<VarTemplateDecl>(TD); | ||||||
1109 | |||||||
1110 | if (SS.isNotEmpty()) | ||||||
1111 | Template = | ||||||
1112 | Context.getQualifiedTemplateName(SS.getScopeRep(), | ||||||
1113 | /*TemplateKeyword=*/false, TD); | ||||||
1114 | else | ||||||
1115 | Template = TemplateName(TD); | ||||||
1116 | } else { | ||||||
1117 | // All results were non-template functions. This is a function template | ||||||
1118 | // name. | ||||||
1119 | IsFunctionTemplate = true; | ||||||
1120 | Template = Context.getAssumedTemplateName(NameInfo.getName()); | ||||||
1121 | } | ||||||
1122 | |||||||
1123 | if (IsFunctionTemplate) { | ||||||
1124 | // Function templates always go through overload resolution, at which | ||||||
1125 | // point we'll perform the various checks (e.g., accessibility) we need | ||||||
1126 | // to based on which function we selected. | ||||||
1127 | Result.suppressDiagnostics(); | ||||||
1128 | |||||||
1129 | return NameClassification::FunctionTemplate(Template); | ||||||
1130 | } | ||||||
1131 | |||||||
1132 | return IsVarTemplate ? NameClassification::VarTemplate(Template) | ||||||
1133 | : NameClassification::TypeTemplate(Template); | ||||||
1134 | } | ||||||
1135 | |||||||
1136 | NamedDecl *FirstDecl = (*Result.begin())->getUnderlyingDecl(); | ||||||
1137 | if (TypeDecl *Type = dyn_cast<TypeDecl>(FirstDecl)) { | ||||||
1138 | DiagnoseUseOfDecl(Type, NameLoc); | ||||||
1139 | MarkAnyDeclReferenced(Type->getLocation(), Type, /*OdrUse=*/false); | ||||||
1140 | QualType T = Context.getTypeDeclType(Type); | ||||||
1141 | if (SS.isNotEmpty()) | ||||||
1142 | return buildNestedType(*this, SS, T, NameLoc); | ||||||
1143 | return ParsedType::make(T); | ||||||
1144 | } | ||||||
1145 | |||||||
1146 | ObjCInterfaceDecl *Class = dyn_cast<ObjCInterfaceDecl>(FirstDecl); | ||||||
1147 | if (!Class) { | ||||||
1148 | // FIXME: It's unfortunate that we don't have a Type node for handling this. | ||||||
1149 | if (ObjCCompatibleAliasDecl *Alias = | ||||||
1150 | dyn_cast<ObjCCompatibleAliasDecl>(FirstDecl)) | ||||||
1151 | Class = Alias->getClassInterface(); | ||||||
1152 | } | ||||||
1153 | |||||||
1154 | if (Class) { | ||||||
1155 | DiagnoseUseOfDecl(Class, NameLoc); | ||||||
1156 | |||||||
1157 | if (NextToken.is(tok::period)) { | ||||||
1158 | // Interface. <something> is parsed as a property reference expression. | ||||||
1159 | // Just return "unknown" as a fall-through for now. | ||||||
1160 | Result.suppressDiagnostics(); | ||||||
1161 | return NameClassification::Unknown(); | ||||||
1162 | } | ||||||
1163 | |||||||
1164 | QualType T = Context.getObjCInterfaceType(Class); | ||||||
1165 | return ParsedType::make(T); | ||||||
1166 | } | ||||||
1167 | |||||||
1168 | if (isa<ConceptDecl>(FirstDecl)) | ||||||
1169 | return NameClassification::Concept( | ||||||
1170 | TemplateName(cast<TemplateDecl>(FirstDecl))); | ||||||
1171 | |||||||
1172 | if (auto *EmptyD = dyn_cast<UnresolvedUsingIfExistsDecl>(FirstDecl)) { | ||||||
1173 | (void)DiagnoseUseOfDecl(EmptyD, NameLoc); | ||||||
1174 | return NameClassification::Error(); | ||||||
1175 | } | ||||||
1176 | |||||||
1177 | // We can have a type template here if we're classifying a template argument. | ||||||
1178 | if (isa<TemplateDecl>(FirstDecl) && !isa<FunctionTemplateDecl>(FirstDecl) && | ||||||
1179 | !isa<VarTemplateDecl>(FirstDecl)) | ||||||
1180 | return NameClassification::TypeTemplate( | ||||||
1181 | TemplateName(cast<TemplateDecl>(FirstDecl))); | ||||||
1182 | |||||||
1183 | // Check for a tag type hidden by a non-type decl in a few cases where it | ||||||
1184 | // seems likely a type is wanted instead of the non-type that was found. | ||||||
1185 | bool NextIsOp = NextToken.isOneOf(tok::amp, tok::star); | ||||||
1186 | if ((NextToken.is(tok::identifier) || | ||||||
1187 | (NextIsOp && | ||||||
1188 | FirstDecl->getUnderlyingDecl()->isFunctionOrFunctionTemplate())) && | ||||||
1189 | isTagTypeWithMissingTag(*this, Result, S, SS, Name, NameLoc)) { | ||||||
1190 | TypeDecl *Type = Result.getAsSingle<TypeDecl>(); | ||||||
1191 | DiagnoseUseOfDecl(Type, NameLoc); | ||||||
1192 | QualType T = Context.getTypeDeclType(Type); | ||||||
1193 | if (SS.isNotEmpty()) | ||||||
1194 | return buildNestedType(*this, SS, T, NameLoc); | ||||||
1195 | return ParsedType::make(T); | ||||||
1196 | } | ||||||
1197 | |||||||
1198 | // If we already know which single declaration is referenced, just annotate | ||||||
1199 | // that declaration directly. Defer resolving even non-overloaded class | ||||||
1200 | // member accesses, as we need to defer certain access checks until we know | ||||||
1201 | // the context. | ||||||
1202 | bool ADL = UseArgumentDependentLookup(SS, Result, NextToken.is(tok::l_paren)); | ||||||
1203 | if (Result.isSingleResult() && !ADL && !FirstDecl->isCXXClassMember()) | ||||||
1204 | return NameClassification::NonType(Result.getRepresentativeDecl()); | ||||||
1205 | |||||||
1206 | // Otherwise, this is an overload set that we will need to resolve later. | ||||||
1207 | Result.suppressDiagnostics(); | ||||||
1208 | return NameClassification::OverloadSet(UnresolvedLookupExpr::Create( | ||||||
1209 | Context, Result.getNamingClass(), SS.getWithLocInContext(Context), | ||||||
1210 | Result.getLookupNameInfo(), ADL, Result.isOverloadedResult(), | ||||||
1211 | Result.begin(), Result.end())); | ||||||
1212 | } | ||||||
1213 | |||||||
1214 | ExprResult | ||||||
1215 | Sema::ActOnNameClassifiedAsUndeclaredNonType(IdentifierInfo *Name, | ||||||
1216 | SourceLocation NameLoc) { | ||||||
1217 | assert(getLangOpts().CPlusPlus && "ADL-only call in C?")(static_cast <bool> (getLangOpts().CPlusPlus && "ADL-only call in C?") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"ADL-only call in C?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1217, __extension__ __PRETTY_FUNCTION__)); | ||||||
1218 | CXXScopeSpec SS; | ||||||
1219 | LookupResult Result(*this, Name, NameLoc, LookupOrdinaryName); | ||||||
1220 | return BuildDeclarationNameExpr(SS, Result, /*ADL=*/true); | ||||||
1221 | } | ||||||
1222 | |||||||
1223 | ExprResult | ||||||
1224 | Sema::ActOnNameClassifiedAsDependentNonType(const CXXScopeSpec &SS, | ||||||
1225 | IdentifierInfo *Name, | ||||||
1226 | SourceLocation NameLoc, | ||||||
1227 | bool IsAddressOfOperand) { | ||||||
1228 | DeclarationNameInfo NameInfo(Name, NameLoc); | ||||||
1229 | return ActOnDependentIdExpression(SS, /*TemplateKWLoc=*/SourceLocation(), | ||||||
1230 | NameInfo, IsAddressOfOperand, | ||||||
1231 | /*TemplateArgs=*/nullptr); | ||||||
1232 | } | ||||||
1233 | |||||||
1234 | ExprResult Sema::ActOnNameClassifiedAsNonType(Scope *S, const CXXScopeSpec &SS, | ||||||
1235 | NamedDecl *Found, | ||||||
1236 | SourceLocation NameLoc, | ||||||
1237 | const Token &NextToken) { | ||||||
1238 | if (getCurMethodDecl() && SS.isEmpty()) | ||||||
1239 | if (auto *Ivar = dyn_cast<ObjCIvarDecl>(Found->getUnderlyingDecl())) | ||||||
1240 | return BuildIvarRefExpr(S, NameLoc, Ivar); | ||||||
1241 | |||||||
1242 | // Reconstruct the lookup result. | ||||||
1243 | LookupResult Result(*this, Found->getDeclName(), NameLoc, LookupOrdinaryName); | ||||||
1244 | Result.addDecl(Found); | ||||||
1245 | Result.resolveKind(); | ||||||
1246 | |||||||
1247 | bool ADL = UseArgumentDependentLookup(SS, Result, NextToken.is(tok::l_paren)); | ||||||
1248 | return BuildDeclarationNameExpr(SS, Result, ADL); | ||||||
1249 | } | ||||||
1250 | |||||||
1251 | ExprResult Sema::ActOnNameClassifiedAsOverloadSet(Scope *S, Expr *E) { | ||||||
1252 | // For an implicit class member access, transform the result into a member | ||||||
1253 | // access expression if necessary. | ||||||
1254 | auto *ULE = cast<UnresolvedLookupExpr>(E); | ||||||
1255 | if ((*ULE->decls_begin())->isCXXClassMember()) { | ||||||
1256 | CXXScopeSpec SS; | ||||||
1257 | SS.Adopt(ULE->getQualifierLoc()); | ||||||
1258 | |||||||
1259 | // Reconstruct the lookup result. | ||||||
1260 | LookupResult Result(*this, ULE->getName(), ULE->getNameLoc(), | ||||||
1261 | LookupOrdinaryName); | ||||||
1262 | Result.setNamingClass(ULE->getNamingClass()); | ||||||
1263 | for (auto I = ULE->decls_begin(), E = ULE->decls_end(); I != E; ++I) | ||||||
1264 | Result.addDecl(*I, I.getAccess()); | ||||||
1265 | Result.resolveKind(); | ||||||
1266 | return BuildPossibleImplicitMemberExpr(SS, SourceLocation(), Result, | ||||||
1267 | nullptr, S); | ||||||
1268 | } | ||||||
1269 | |||||||
1270 | // Otherwise, this is already in the form we needed, and no further checks | ||||||
1271 | // are necessary. | ||||||
1272 | return ULE; | ||||||
1273 | } | ||||||
1274 | |||||||
1275 | Sema::TemplateNameKindForDiagnostics | ||||||
1276 | Sema::getTemplateNameKindForDiagnostics(TemplateName Name) { | ||||||
1277 | auto *TD = Name.getAsTemplateDecl(); | ||||||
1278 | if (!TD) | ||||||
1279 | return TemplateNameKindForDiagnostics::DependentTemplate; | ||||||
1280 | if (isa<ClassTemplateDecl>(TD)) | ||||||
1281 | return TemplateNameKindForDiagnostics::ClassTemplate; | ||||||
1282 | if (isa<FunctionTemplateDecl>(TD)) | ||||||
1283 | return TemplateNameKindForDiagnostics::FunctionTemplate; | ||||||
1284 | if (isa<VarTemplateDecl>(TD)) | ||||||
1285 | return TemplateNameKindForDiagnostics::VarTemplate; | ||||||
1286 | if (isa<TypeAliasTemplateDecl>(TD)) | ||||||
1287 | return TemplateNameKindForDiagnostics::AliasTemplate; | ||||||
1288 | if (isa<TemplateTemplateParmDecl>(TD)) | ||||||
1289 | return TemplateNameKindForDiagnostics::TemplateTemplateParam; | ||||||
1290 | if (isa<ConceptDecl>(TD)) | ||||||
1291 | return TemplateNameKindForDiagnostics::Concept; | ||||||
1292 | return TemplateNameKindForDiagnostics::DependentTemplate; | ||||||
1293 | } | ||||||
1294 | |||||||
1295 | void Sema::PushDeclContext(Scope *S, DeclContext *DC) { | ||||||
1296 | assert(DC->getLexicalParent() == CurContext &&(static_cast <bool> (DC->getLexicalParent() == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("DC->getLexicalParent() == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1297, __extension__ __PRETTY_FUNCTION__)) | ||||||
1297 | "The next DeclContext should be lexically contained in the current one.")(static_cast <bool> (DC->getLexicalParent() == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("DC->getLexicalParent() == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1297, __extension__ __PRETTY_FUNCTION__)); | ||||||
1298 | CurContext = DC; | ||||||
1299 | S->setEntity(DC); | ||||||
1300 | } | ||||||
1301 | |||||||
1302 | void Sema::PopDeclContext() { | ||||||
1303 | assert(CurContext && "DeclContext imbalance!")(static_cast <bool> (CurContext && "DeclContext imbalance!" ) ? void (0) : __assert_fail ("CurContext && \"DeclContext imbalance!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1303, __extension__ __PRETTY_FUNCTION__)); | ||||||
1304 | |||||||
1305 | CurContext = CurContext->getLexicalParent(); | ||||||
1306 | assert(CurContext && "Popped translation unit!")(static_cast <bool> (CurContext && "Popped translation unit!" ) ? void (0) : __assert_fail ("CurContext && \"Popped translation unit!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1306, __extension__ __PRETTY_FUNCTION__)); | ||||||
1307 | } | ||||||
1308 | |||||||
1309 | Sema::SkippedDefinitionContext Sema::ActOnTagStartSkippedDefinition(Scope *S, | ||||||
1310 | Decl *D) { | ||||||
1311 | // Unlike PushDeclContext, the context to which we return is not necessarily | ||||||
1312 | // the containing DC of TD, because the new context will be some pre-existing | ||||||
1313 | // TagDecl definition instead of a fresh one. | ||||||
1314 | auto Result = static_cast<SkippedDefinitionContext>(CurContext); | ||||||
1315 | CurContext = cast<TagDecl>(D)->getDefinition(); | ||||||
1316 | assert(CurContext && "skipping definition of undefined tag")(static_cast <bool> (CurContext && "skipping definition of undefined tag" ) ? void (0) : __assert_fail ("CurContext && \"skipping definition of undefined tag\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1316, __extension__ __PRETTY_FUNCTION__)); | ||||||
1317 | // Start lookups from the parent of the current context; we don't want to look | ||||||
1318 | // into the pre-existing complete definition. | ||||||
1319 | S->setEntity(CurContext->getLookupParent()); | ||||||
1320 | return Result; | ||||||
1321 | } | ||||||
1322 | |||||||
1323 | void Sema::ActOnTagFinishSkippedDefinition(SkippedDefinitionContext Context) { | ||||||
1324 | CurContext = static_cast<decltype(CurContext)>(Context); | ||||||
1325 | } | ||||||
1326 | |||||||
1327 | /// EnterDeclaratorContext - Used when we must lookup names in the context | ||||||
1328 | /// of a declarator's nested name specifier. | ||||||
1329 | /// | ||||||
1330 | void Sema::EnterDeclaratorContext(Scope *S, DeclContext *DC) { | ||||||
1331 | // C++0x [basic.lookup.unqual]p13: | ||||||
1332 | // A name used in the definition of a static data member of class | ||||||
1333 | // X (after the qualified-id of the static member) is looked up as | ||||||
1334 | // if the name was used in a member function of X. | ||||||
1335 | // C++0x [basic.lookup.unqual]p14: | ||||||
1336 | // If a variable member of a namespace is defined outside of the | ||||||
1337 | // scope of its namespace then any name used in the definition of | ||||||
1338 | // the variable member (after the declarator-id) is looked up as | ||||||
1339 | // if the definition of the variable member occurred in its | ||||||
1340 | // namespace. | ||||||
1341 | // Both of these imply that we should push a scope whose context | ||||||
1342 | // is the semantic context of the declaration. We can't use | ||||||
1343 | // PushDeclContext here because that context is not necessarily | ||||||
1344 | // lexically contained in the current context. Fortunately, | ||||||
1345 | // the containing scope should have the appropriate information. | ||||||
1346 | |||||||
1347 | assert(!S->getEntity() && "scope already has entity")(static_cast <bool> (!S->getEntity() && "scope already has entity" ) ? void (0) : __assert_fail ("!S->getEntity() && \"scope already has entity\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1347, __extension__ __PRETTY_FUNCTION__)); | ||||||
1348 | |||||||
1349 | #ifndef NDEBUG | ||||||
1350 | Scope *Ancestor = S->getParent(); | ||||||
1351 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); | ||||||
1352 | assert(Ancestor->getEntity() == CurContext && "ancestor context mismatch")(static_cast <bool> (Ancestor->getEntity() == CurContext && "ancestor context mismatch") ? void (0) : __assert_fail ("Ancestor->getEntity() == CurContext && \"ancestor context mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1352, __extension__ __PRETTY_FUNCTION__)); | ||||||
1353 | #endif | ||||||
1354 | |||||||
1355 | CurContext = DC; | ||||||
1356 | S->setEntity(DC); | ||||||
1357 | |||||||
1358 | if (S->getParent()->isTemplateParamScope()) { | ||||||
1359 | // Also set the corresponding entities for all immediately-enclosing | ||||||
1360 | // template parameter scopes. | ||||||
1361 | EnterTemplatedContext(S->getParent(), DC); | ||||||
1362 | } | ||||||
1363 | } | ||||||
1364 | |||||||
1365 | void Sema::ExitDeclaratorContext(Scope *S) { | ||||||
1366 | assert(S->getEntity() == CurContext && "Context imbalance!")(static_cast <bool> (S->getEntity() == CurContext && "Context imbalance!") ? void (0) : __assert_fail ("S->getEntity() == CurContext && \"Context imbalance!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1366, __extension__ __PRETTY_FUNCTION__)); | ||||||
1367 | |||||||
1368 | // Switch back to the lexical context. The safety of this is | ||||||
1369 | // enforced by an assert in EnterDeclaratorContext. | ||||||
1370 | Scope *Ancestor = S->getParent(); | ||||||
1371 | while (!Ancestor->getEntity()) Ancestor = Ancestor->getParent(); | ||||||
1372 | CurContext = Ancestor->getEntity(); | ||||||
1373 | |||||||
1374 | // We don't need to do anything with the scope, which is going to | ||||||
1375 | // disappear. | ||||||
1376 | } | ||||||
1377 | |||||||
1378 | void Sema::EnterTemplatedContext(Scope *S, DeclContext *DC) { | ||||||
1379 | assert(S->isTemplateParamScope() &&(static_cast <bool> (S->isTemplateParamScope() && "expected to be initializing a template parameter scope") ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"expected to be initializing a template parameter scope\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1380, __extension__ __PRETTY_FUNCTION__)) | ||||||
1380 | "expected to be initializing a template parameter scope")(static_cast <bool> (S->isTemplateParamScope() && "expected to be initializing a template parameter scope") ? void (0) : __assert_fail ("S->isTemplateParamScope() && \"expected to be initializing a template parameter scope\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1380, __extension__ __PRETTY_FUNCTION__)); | ||||||
1381 | |||||||
1382 | // C++20 [temp.local]p7: | ||||||
1383 | // In the definition of a member of a class template that appears outside | ||||||
1384 | // of the class template definition, the name of a member of the class | ||||||
1385 | // template hides the name of a template-parameter of any enclosing class | ||||||
1386 | // templates (but not a template-parameter of the member if the member is a | ||||||
1387 | // class or function template). | ||||||
1388 | // C++20 [temp.local]p9: | ||||||
1389 | // In the definition of a class template or in the definition of a member | ||||||
1390 | // of such a template that appears outside of the template definition, for | ||||||
1391 | // each non-dependent base class (13.8.2.1), if the name of the base class | ||||||
1392 | // or the name of a member of the base class is the same as the name of a | ||||||
1393 | // template-parameter, the base class name or member name hides the | ||||||
1394 | // template-parameter name (6.4.10). | ||||||
1395 | // | ||||||
1396 | // This means that a template parameter scope should be searched immediately | ||||||
1397 | // after searching the DeclContext for which it is a template parameter | ||||||
1398 | // scope. For example, for | ||||||
1399 | // template<typename T> template<typename U> template<typename V> | ||||||
1400 | // void N::A<T>::B<U>::f(...) | ||||||
1401 | // we search V then B<U> (and base classes) then U then A<T> (and base | ||||||
1402 | // classes) then T then N then ::. | ||||||
1403 | unsigned ScopeDepth = getTemplateDepth(S); | ||||||
1404 | for (; S && S->isTemplateParamScope(); S = S->getParent(), --ScopeDepth) { | ||||||
1405 | DeclContext *SearchDCAfterScope = DC; | ||||||
1406 | for (; DC; DC = DC->getLookupParent()) { | ||||||
1407 | if (const TemplateParameterList *TPL = | ||||||
1408 | cast<Decl>(DC)->getDescribedTemplateParams()) { | ||||||
1409 | unsigned DCDepth = TPL->getDepth() + 1; | ||||||
1410 | if (DCDepth > ScopeDepth) | ||||||
1411 | continue; | ||||||
1412 | if (ScopeDepth == DCDepth) | ||||||
1413 | SearchDCAfterScope = DC = DC->getLookupParent(); | ||||||
1414 | break; | ||||||
1415 | } | ||||||
1416 | } | ||||||
1417 | S->setLookupEntity(SearchDCAfterScope); | ||||||
1418 | } | ||||||
1419 | } | ||||||
1420 | |||||||
1421 | void Sema::ActOnReenterFunctionContext(Scope* S, Decl *D) { | ||||||
1422 | // We assume that the caller has already called | ||||||
1423 | // ActOnReenterTemplateScope so getTemplatedDecl() works. | ||||||
1424 | FunctionDecl *FD = D->getAsFunction(); | ||||||
1425 | if (!FD) | ||||||
1426 | return; | ||||||
1427 | |||||||
1428 | // Same implementation as PushDeclContext, but enters the context | ||||||
1429 | // from the lexical parent, rather than the top-level class. | ||||||
1430 | assert(CurContext == FD->getLexicalParent() &&(static_cast <bool> (CurContext == FD->getLexicalParent () && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("CurContext == FD->getLexicalParent() && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1431, __extension__ __PRETTY_FUNCTION__)) | ||||||
1431 | "The next DeclContext should be lexically contained in the current one.")(static_cast <bool> (CurContext == FD->getLexicalParent () && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("CurContext == FD->getLexicalParent() && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1431, __extension__ __PRETTY_FUNCTION__)); | ||||||
1432 | CurContext = FD; | ||||||
1433 | S->setEntity(CurContext); | ||||||
1434 | |||||||
1435 | for (unsigned P = 0, NumParams = FD->getNumParams(); P < NumParams; ++P) { | ||||||
1436 | ParmVarDecl *Param = FD->getParamDecl(P); | ||||||
1437 | // If the parameter has an identifier, then add it to the scope | ||||||
1438 | if (Param->getIdentifier()) { | ||||||
1439 | S->AddDecl(Param); | ||||||
1440 | IdResolver.AddDecl(Param); | ||||||
1441 | } | ||||||
1442 | } | ||||||
1443 | } | ||||||
1444 | |||||||
1445 | void Sema::ActOnExitFunctionContext() { | ||||||
1446 | // Same implementation as PopDeclContext, but returns to the lexical parent, | ||||||
1447 | // rather than the top-level class. | ||||||
1448 | assert(CurContext && "DeclContext imbalance!")(static_cast <bool> (CurContext && "DeclContext imbalance!" ) ? void (0) : __assert_fail ("CurContext && \"DeclContext imbalance!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1448, __extension__ __PRETTY_FUNCTION__)); | ||||||
1449 | CurContext = CurContext->getLexicalParent(); | ||||||
1450 | assert(CurContext && "Popped translation unit!")(static_cast <bool> (CurContext && "Popped translation unit!" ) ? void (0) : __assert_fail ("CurContext && \"Popped translation unit!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1450, __extension__ __PRETTY_FUNCTION__)); | ||||||
1451 | } | ||||||
1452 | |||||||
1453 | /// Determine whether we allow overloading of the function | ||||||
1454 | /// PrevDecl with another declaration. | ||||||
1455 | /// | ||||||
1456 | /// This routine determines whether overloading is possible, not | ||||||
1457 | /// whether some new function is actually an overload. It will return | ||||||
1458 | /// true in C++ (where we can always provide overloads) or, as an | ||||||
1459 | /// extension, in C when the previous function is already an | ||||||
1460 | /// overloaded function declaration or has the "overloadable" | ||||||
1461 | /// attribute. | ||||||
1462 | static bool AllowOverloadingOfFunction(LookupResult &Previous, | ||||||
1463 | ASTContext &Context, | ||||||
1464 | const FunctionDecl *New) { | ||||||
1465 | if (Context.getLangOpts().CPlusPlus) | ||||||
1466 | return true; | ||||||
1467 | |||||||
1468 | if (Previous.getResultKind() == LookupResult::FoundOverloaded) | ||||||
1469 | return true; | ||||||
1470 | |||||||
1471 | return Previous.getResultKind() == LookupResult::Found && | ||||||
1472 | (Previous.getFoundDecl()->hasAttr<OverloadableAttr>() || | ||||||
1473 | New->hasAttr<OverloadableAttr>()); | ||||||
1474 | } | ||||||
1475 | |||||||
1476 | /// Add this decl to the scope shadowed decl chains. | ||||||
1477 | void Sema::PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext) { | ||||||
1478 | // Move up the scope chain until we find the nearest enclosing | ||||||
1479 | // non-transparent context. The declaration will be introduced into this | ||||||
1480 | // scope. | ||||||
1481 | while (S->getEntity() && S->getEntity()->isTransparentContext()) | ||||||
1482 | S = S->getParent(); | ||||||
1483 | |||||||
1484 | // Add scoped declarations into their context, so that they can be | ||||||
1485 | // found later. Declarations without a context won't be inserted | ||||||
1486 | // into any context. | ||||||
1487 | if (AddToContext) | ||||||
1488 | CurContext->addDecl(D); | ||||||
1489 | |||||||
1490 | // Out-of-line definitions shouldn't be pushed into scope in C++, unless they | ||||||
1491 | // are function-local declarations. | ||||||
1492 | if (getLangOpts().CPlusPlus && D->isOutOfLine() && !S->getFnParent()) | ||||||
1493 | return; | ||||||
1494 | |||||||
1495 | // Template instantiations should also not be pushed into scope. | ||||||
1496 | if (isa<FunctionDecl>(D) && | ||||||
1497 | cast<FunctionDecl>(D)->isFunctionTemplateSpecialization()) | ||||||
1498 | return; | ||||||
1499 | |||||||
1500 | // If this replaces anything in the current scope, | ||||||
1501 | IdentifierResolver::iterator I = IdResolver.begin(D->getDeclName()), | ||||||
1502 | IEnd = IdResolver.end(); | ||||||
1503 | for (; I != IEnd; ++I) { | ||||||
1504 | if (S->isDeclScope(*I) && D->declarationReplaces(*I)) { | ||||||
1505 | S->RemoveDecl(*I); | ||||||
1506 | IdResolver.RemoveDecl(*I); | ||||||
1507 | |||||||
1508 | // Should only need to replace one decl. | ||||||
1509 | break; | ||||||
1510 | } | ||||||
1511 | } | ||||||
1512 | |||||||
1513 | S->AddDecl(D); | ||||||
1514 | |||||||
1515 | if (isa<LabelDecl>(D) && !cast<LabelDecl>(D)->isGnuLocal()) { | ||||||
1516 | // Implicitly-generated labels may end up getting generated in an order that | ||||||
1517 | // isn't strictly lexical, which breaks name lookup. Be careful to insert | ||||||
1518 | // the label at the appropriate place in the identifier chain. | ||||||
1519 | for (I = IdResolver.begin(D->getDeclName()); I != IEnd; ++I) { | ||||||
1520 | DeclContext *IDC = (*I)->getLexicalDeclContext()->getRedeclContext(); | ||||||
1521 | if (IDC == CurContext) { | ||||||
1522 | if (!S->isDeclScope(*I)) | ||||||
1523 | continue; | ||||||
1524 | } else if (IDC->Encloses(CurContext)) | ||||||
1525 | break; | ||||||
1526 | } | ||||||
1527 | |||||||
1528 | IdResolver.InsertDeclAfter(I, D); | ||||||
1529 | } else { | ||||||
1530 | IdResolver.AddDecl(D); | ||||||
1531 | } | ||||||
1532 | warnOnReservedIdentifier(D); | ||||||
1533 | } | ||||||
1534 | |||||||
1535 | bool Sema::isDeclInScope(NamedDecl *D, DeclContext *Ctx, Scope *S, | ||||||
1536 | bool AllowInlineNamespace) { | ||||||
1537 | return IdResolver.isDeclInScope(D, Ctx, S, AllowInlineNamespace); | ||||||
1538 | } | ||||||
1539 | |||||||
1540 | Scope *Sema::getScopeForDeclContext(Scope *S, DeclContext *DC) { | ||||||
1541 | DeclContext *TargetDC = DC->getPrimaryContext(); | ||||||
1542 | do { | ||||||
1543 | if (DeclContext *ScopeDC = S->getEntity()) | ||||||
1544 | if (ScopeDC->getPrimaryContext() == TargetDC) | ||||||
1545 | return S; | ||||||
1546 | } while ((S = S->getParent())); | ||||||
1547 | |||||||
1548 | return nullptr; | ||||||
1549 | } | ||||||
1550 | |||||||
1551 | static bool isOutOfScopePreviousDeclaration(NamedDecl *, | ||||||
1552 | DeclContext*, | ||||||
1553 | ASTContext&); | ||||||
1554 | |||||||
1555 | /// Filters out lookup results that don't fall within the given scope | ||||||
1556 | /// as determined by isDeclInScope. | ||||||
1557 | void Sema::FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, | ||||||
1558 | bool ConsiderLinkage, | ||||||
1559 | bool AllowInlineNamespace) { | ||||||
1560 | LookupResult::Filter F = R.makeFilter(); | ||||||
1561 | while (F.hasNext()) { | ||||||
1562 | NamedDecl *D = F.next(); | ||||||
1563 | |||||||
1564 | if (isDeclInScope(D, Ctx, S, AllowInlineNamespace)) | ||||||
1565 | continue; | ||||||
1566 | |||||||
1567 | if (ConsiderLinkage && isOutOfScopePreviousDeclaration(D, Ctx, Context)) | ||||||
1568 | continue; | ||||||
1569 | |||||||
1570 | F.erase(); | ||||||
1571 | } | ||||||
1572 | |||||||
1573 | F.done(); | ||||||
1574 | } | ||||||
1575 | |||||||
1576 | /// We've determined that \p New is a redeclaration of \p Old. Check that they | ||||||
1577 | /// have compatible owning modules. | ||||||
1578 | bool Sema::CheckRedeclarationModuleOwnership(NamedDecl *New, NamedDecl *Old) { | ||||||
1579 | // FIXME: The Modules TS is not clear about how friend declarations are | ||||||
1580 | // to be treated. It's not meaningful to have different owning modules for | ||||||
1581 | // linkage in redeclarations of the same entity, so for now allow the | ||||||
1582 | // redeclaration and change the owning modules to match. | ||||||
1583 | if (New->getFriendObjectKind() && | ||||||
1584 | Old->getOwningModuleForLinkage() != New->getOwningModuleForLinkage()) { | ||||||
1585 | New->setLocalOwningModule(Old->getOwningModule()); | ||||||
1586 | makeMergedDefinitionVisible(New); | ||||||
1587 | return false; | ||||||
1588 | } | ||||||
1589 | |||||||
1590 | Module *NewM = New->getOwningModule(); | ||||||
1591 | Module *OldM = Old->getOwningModule(); | ||||||
1592 | |||||||
1593 | if (NewM && NewM->Kind == Module::PrivateModuleFragment) | ||||||
1594 | NewM = NewM->Parent; | ||||||
1595 | if (OldM && OldM->Kind == Module::PrivateModuleFragment) | ||||||
1596 | OldM = OldM->Parent; | ||||||
1597 | |||||||
1598 | if (NewM == OldM) | ||||||
1599 | return false; | ||||||
1600 | |||||||
1601 | bool NewIsModuleInterface = NewM && NewM->isModulePurview(); | ||||||
1602 | bool OldIsModuleInterface = OldM && OldM->isModulePurview(); | ||||||
1603 | if (NewIsModuleInterface || OldIsModuleInterface) { | ||||||
1604 | // C++ Modules TS [basic.def.odr] 6.2/6.7 [sic]: | ||||||
1605 | // if a declaration of D [...] appears in the purview of a module, all | ||||||
1606 | // other such declarations shall appear in the purview of the same module | ||||||
1607 | Diag(New->getLocation(), diag::err_mismatched_owning_module) | ||||||
1608 | << New | ||||||
1609 | << NewIsModuleInterface | ||||||
1610 | << (NewIsModuleInterface ? NewM->getFullModuleName() : "") | ||||||
1611 | << OldIsModuleInterface | ||||||
1612 | << (OldIsModuleInterface ? OldM->getFullModuleName() : ""); | ||||||
1613 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
1614 | New->setInvalidDecl(); | ||||||
1615 | return true; | ||||||
1616 | } | ||||||
1617 | |||||||
1618 | return false; | ||||||
1619 | } | ||||||
1620 | |||||||
1621 | static bool isUsingDecl(NamedDecl *D) { | ||||||
1622 | return isa<UsingShadowDecl>(D) || | ||||||
1623 | isa<UnresolvedUsingTypenameDecl>(D) || | ||||||
1624 | isa<UnresolvedUsingValueDecl>(D); | ||||||
1625 | } | ||||||
1626 | |||||||
1627 | /// Removes using shadow declarations from the lookup results. | ||||||
1628 | static void RemoveUsingDecls(LookupResult &R) { | ||||||
1629 | LookupResult::Filter F = R.makeFilter(); | ||||||
1630 | while (F.hasNext()) | ||||||
1631 | if (isUsingDecl(F.next())) | ||||||
1632 | F.erase(); | ||||||
1633 | |||||||
1634 | F.done(); | ||||||
1635 | } | ||||||
1636 | |||||||
1637 | /// Check for this common pattern: | ||||||
1638 | /// @code | ||||||
1639 | /// class S { | ||||||
1640 | /// S(const S&); // DO NOT IMPLEMENT | ||||||
1641 | /// void operator=(const S&); // DO NOT IMPLEMENT | ||||||
1642 | /// }; | ||||||
1643 | /// @endcode | ||||||
1644 | static bool IsDisallowedCopyOrAssign(const CXXMethodDecl *D) { | ||||||
1645 | // FIXME: Should check for private access too but access is set after we get | ||||||
1646 | // the decl here. | ||||||
1647 | if (D->doesThisDeclarationHaveABody()) | ||||||
1648 | return false; | ||||||
1649 | |||||||
1650 | if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(D)) | ||||||
1651 | return CD->isCopyConstructor(); | ||||||
1652 | return D->isCopyAssignmentOperator(); | ||||||
1653 | } | ||||||
1654 | |||||||
1655 | // We need this to handle | ||||||
1656 | // | ||||||
1657 | // typedef struct { | ||||||
1658 | // void *foo() { return 0; } | ||||||
1659 | // } A; | ||||||
1660 | // | ||||||
1661 | // When we see foo we don't know if after the typedef we will get 'A' or '*A' | ||||||
1662 | // for example. If 'A', foo will have external linkage. If we have '*A', | ||||||
1663 | // foo will have no linkage. Since we can't know until we get to the end | ||||||
1664 | // of the typedef, this function finds out if D might have non-external linkage. | ||||||
1665 | // Callers should verify at the end of the TU if it D has external linkage or | ||||||
1666 | // not. | ||||||
1667 | bool Sema::mightHaveNonExternalLinkage(const DeclaratorDecl *D) { | ||||||
1668 | const DeclContext *DC = D->getDeclContext(); | ||||||
1669 | while (!DC->isTranslationUnit()) { | ||||||
1670 | if (const RecordDecl *RD = dyn_cast<RecordDecl>(DC)){ | ||||||
1671 | if (!RD->hasNameForLinkage()) | ||||||
1672 | return true; | ||||||
1673 | } | ||||||
1674 | DC = DC->getParent(); | ||||||
1675 | } | ||||||
1676 | |||||||
1677 | return !D->isExternallyVisible(); | ||||||
1678 | } | ||||||
1679 | |||||||
1680 | // FIXME: This needs to be refactored; some other isInMainFile users want | ||||||
1681 | // these semantics. | ||||||
1682 | static bool isMainFileLoc(const Sema &S, SourceLocation Loc) { | ||||||
1683 | if (S.TUKind != TU_Complete) | ||||||
1684 | return false; | ||||||
1685 | return S.SourceMgr.isInMainFile(Loc); | ||||||
1686 | } | ||||||
1687 | |||||||
1688 | bool Sema::ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const { | ||||||
1689 | assert(D)(static_cast <bool> (D) ? void (0) : __assert_fail ("D" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1689, __extension__ __PRETTY_FUNCTION__)); | ||||||
1690 | |||||||
1691 | if (D->isInvalidDecl() || D->isUsed() || D->hasAttr<UnusedAttr>()) | ||||||
1692 | return false; | ||||||
1693 | |||||||
1694 | // Ignore all entities declared within templates, and out-of-line definitions | ||||||
1695 | // of members of class templates. | ||||||
1696 | if (D->getDeclContext()->isDependentContext() || | ||||||
1697 | D->getLexicalDeclContext()->isDependentContext()) | ||||||
1698 | return false; | ||||||
1699 | |||||||
1700 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
1701 | if (FD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | ||||||
1702 | return false; | ||||||
1703 | // A non-out-of-line declaration of a member specialization was implicitly | ||||||
1704 | // instantiated; it's the out-of-line declaration that we're interested in. | ||||||
1705 | if (FD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && | ||||||
1706 | FD->getMemberSpecializationInfo() && !FD->isOutOfLine()) | ||||||
1707 | return false; | ||||||
1708 | |||||||
1709 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
1710 | if (MD->isVirtual() || IsDisallowedCopyOrAssign(MD)) | ||||||
1711 | return false; | ||||||
1712 | } else { | ||||||
1713 | // 'static inline' functions are defined in headers; don't warn. | ||||||
1714 | if (FD->isInlined() && !isMainFileLoc(*this, FD->getLocation())) | ||||||
1715 | return false; | ||||||
1716 | } | ||||||
1717 | |||||||
1718 | if (FD->doesThisDeclarationHaveABody() && | ||||||
1719 | Context.DeclMustBeEmitted(FD)) | ||||||
1720 | return false; | ||||||
1721 | } else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1722 | // Constants and utility variables are defined in headers with internal | ||||||
1723 | // linkage; don't warn. (Unlike functions, there isn't a convenient marker | ||||||
1724 | // like "inline".) | ||||||
1725 | if (!isMainFileLoc(*this, VD->getLocation())) | ||||||
1726 | return false; | ||||||
1727 | |||||||
1728 | if (Context.DeclMustBeEmitted(VD)) | ||||||
1729 | return false; | ||||||
1730 | |||||||
1731 | if (VD->isStaticDataMember() && | ||||||
1732 | VD->getTemplateSpecializationKind() == TSK_ImplicitInstantiation) | ||||||
1733 | return false; | ||||||
1734 | if (VD->isStaticDataMember() && | ||||||
1735 | VD->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && | ||||||
1736 | VD->getMemberSpecializationInfo() && !VD->isOutOfLine()) | ||||||
1737 | return false; | ||||||
1738 | |||||||
1739 | if (VD->isInline() && !isMainFileLoc(*this, VD->getLocation())) | ||||||
1740 | return false; | ||||||
1741 | } else { | ||||||
1742 | return false; | ||||||
1743 | } | ||||||
1744 | |||||||
1745 | // Only warn for unused decls internal to the translation unit. | ||||||
1746 | // FIXME: This seems like a bogus check; it suppresses -Wunused-function | ||||||
1747 | // for inline functions defined in the main source file, for instance. | ||||||
1748 | return mightHaveNonExternalLinkage(D); | ||||||
1749 | } | ||||||
1750 | |||||||
1751 | void Sema::MarkUnusedFileScopedDecl(const DeclaratorDecl *D) { | ||||||
1752 | if (!D) | ||||||
1753 | return; | ||||||
1754 | |||||||
1755 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
1756 | const FunctionDecl *First = FD->getFirstDecl(); | ||||||
1757 | if (FD != First && ShouldWarnIfUnusedFileScopedDecl(First)) | ||||||
1758 | return; // First should already be in the vector. | ||||||
1759 | } | ||||||
1760 | |||||||
1761 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1762 | const VarDecl *First = VD->getFirstDecl(); | ||||||
1763 | if (VD != First && ShouldWarnIfUnusedFileScopedDecl(First)) | ||||||
1764 | return; // First should already be in the vector. | ||||||
1765 | } | ||||||
1766 | |||||||
1767 | if (ShouldWarnIfUnusedFileScopedDecl(D)) | ||||||
1768 | UnusedFileScopedDecls.push_back(D); | ||||||
1769 | } | ||||||
1770 | |||||||
1771 | static bool ShouldDiagnoseUnusedDecl(const NamedDecl *D) { | ||||||
1772 | if (D->isInvalidDecl()) | ||||||
1773 | return false; | ||||||
1774 | |||||||
1775 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) { | ||||||
1776 | // For a decomposition declaration, warn if none of the bindings are | ||||||
1777 | // referenced, instead of if the variable itself is referenced (which | ||||||
1778 | // it is, by the bindings' expressions). | ||||||
1779 | for (auto *BD : DD->bindings()) | ||||||
1780 | if (BD->isReferenced()) | ||||||
1781 | return false; | ||||||
1782 | } else if (!D->getDeclName()) { | ||||||
1783 | return false; | ||||||
1784 | } else if (D->isReferenced() || D->isUsed()) { | ||||||
1785 | return false; | ||||||
1786 | } | ||||||
1787 | |||||||
1788 | if (D->hasAttr<UnusedAttr>() || D->hasAttr<ObjCPreciseLifetimeAttr>()) | ||||||
1789 | return false; | ||||||
1790 | |||||||
1791 | if (isa<LabelDecl>(D)) | ||||||
1792 | return true; | ||||||
1793 | |||||||
1794 | // Except for labels, we only care about unused decls that are local to | ||||||
1795 | // functions. | ||||||
1796 | bool WithinFunction = D->getDeclContext()->isFunctionOrMethod(); | ||||||
1797 | if (const auto *R = dyn_cast<CXXRecordDecl>(D->getDeclContext())) | ||||||
1798 | // For dependent types, the diagnostic is deferred. | ||||||
1799 | WithinFunction = | ||||||
1800 | WithinFunction || (R->isLocalClass() && !R->isDependentType()); | ||||||
1801 | if (!WithinFunction) | ||||||
1802 | return false; | ||||||
1803 | |||||||
1804 | if (isa<TypedefNameDecl>(D)) | ||||||
1805 | return true; | ||||||
1806 | |||||||
1807 | // White-list anything that isn't a local variable. | ||||||
1808 | if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D) || isa<ImplicitParamDecl>(D)) | ||||||
1809 | return false; | ||||||
1810 | |||||||
1811 | // Types of valid local variables should be complete, so this should succeed. | ||||||
1812 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1813 | |||||||
1814 | // White-list anything with an __attribute__((unused)) type. | ||||||
1815 | const auto *Ty = VD->getType().getTypePtr(); | ||||||
1816 | |||||||
1817 | // Only look at the outermost level of typedef. | ||||||
1818 | if (const TypedefType *TT = Ty->getAs<TypedefType>()) { | ||||||
1819 | if (TT->getDecl()->hasAttr<UnusedAttr>()) | ||||||
1820 | return false; | ||||||
1821 | } | ||||||
1822 | |||||||
1823 | // If we failed to complete the type for some reason, or if the type is | ||||||
1824 | // dependent, don't diagnose the variable. | ||||||
1825 | if (Ty->isIncompleteType() || Ty->isDependentType()) | ||||||
1826 | return false; | ||||||
1827 | |||||||
1828 | // Look at the element type to ensure that the warning behaviour is | ||||||
1829 | // consistent for both scalars and arrays. | ||||||
1830 | Ty = Ty->getBaseElementTypeUnsafe(); | ||||||
1831 | |||||||
1832 | if (const TagType *TT = Ty->getAs<TagType>()) { | ||||||
1833 | const TagDecl *Tag = TT->getDecl(); | ||||||
1834 | if (Tag->hasAttr<UnusedAttr>()) | ||||||
1835 | return false; | ||||||
1836 | |||||||
1837 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Tag)) { | ||||||
1838 | if (!RD->hasTrivialDestructor() && !RD->hasAttr<WarnUnusedAttr>()) | ||||||
1839 | return false; | ||||||
1840 | |||||||
1841 | if (const Expr *Init = VD->getInit()) { | ||||||
1842 | if (const ExprWithCleanups *Cleanups = | ||||||
1843 | dyn_cast<ExprWithCleanups>(Init)) | ||||||
1844 | Init = Cleanups->getSubExpr(); | ||||||
1845 | const CXXConstructExpr *Construct = | ||||||
1846 | dyn_cast<CXXConstructExpr>(Init); | ||||||
1847 | if (Construct && !Construct->isElidable()) { | ||||||
1848 | CXXConstructorDecl *CD = Construct->getConstructor(); | ||||||
1849 | if (!CD->isTrivial() && !RD->hasAttr<WarnUnusedAttr>() && | ||||||
1850 | (VD->getInit()->isValueDependent() || !VD->evaluateValue())) | ||||||
1851 | return false; | ||||||
1852 | } | ||||||
1853 | |||||||
1854 | // Suppress the warning if we don't know how this is constructed, and | ||||||
1855 | // it could possibly be non-trivial constructor. | ||||||
1856 | if (Init->isTypeDependent()) | ||||||
1857 | for (const CXXConstructorDecl *Ctor : RD->ctors()) | ||||||
1858 | if (!Ctor->isTrivial()) | ||||||
1859 | return false; | ||||||
1860 | } | ||||||
1861 | } | ||||||
1862 | } | ||||||
1863 | |||||||
1864 | // TODO: __attribute__((unused)) templates? | ||||||
1865 | } | ||||||
1866 | |||||||
1867 | return true; | ||||||
1868 | } | ||||||
1869 | |||||||
1870 | static void GenerateFixForUnusedDecl(const NamedDecl *D, ASTContext &Ctx, | ||||||
1871 | FixItHint &Hint) { | ||||||
1872 | if (isa<LabelDecl>(D)) { | ||||||
1873 | SourceLocation AfterColon = Lexer::findLocationAfterToken( | ||||||
1874 | D->getEndLoc(), tok::colon, Ctx.getSourceManager(), Ctx.getLangOpts(), | ||||||
1875 | true); | ||||||
1876 | if (AfterColon.isInvalid()) | ||||||
1877 | return; | ||||||
1878 | Hint = FixItHint::CreateRemoval( | ||||||
1879 | CharSourceRange::getCharRange(D->getBeginLoc(), AfterColon)); | ||||||
1880 | } | ||||||
1881 | } | ||||||
1882 | |||||||
1883 | void Sema::DiagnoseUnusedNestedTypedefs(const RecordDecl *D) { | ||||||
1884 | if (D->getTypeForDecl()->isDependentType()) | ||||||
1885 | return; | ||||||
1886 | |||||||
1887 | for (auto *TmpD : D->decls()) { | ||||||
1888 | if (const auto *T = dyn_cast<TypedefNameDecl>(TmpD)) | ||||||
1889 | DiagnoseUnusedDecl(T); | ||||||
1890 | else if(const auto *R = dyn_cast<RecordDecl>(TmpD)) | ||||||
1891 | DiagnoseUnusedNestedTypedefs(R); | ||||||
1892 | } | ||||||
1893 | } | ||||||
1894 | |||||||
1895 | /// DiagnoseUnusedDecl - Emit warnings about declarations that are not used | ||||||
1896 | /// unless they are marked attr(unused). | ||||||
1897 | void Sema::DiagnoseUnusedDecl(const NamedDecl *D) { | ||||||
1898 | if (!ShouldDiagnoseUnusedDecl(D)) | ||||||
1899 | return; | ||||||
1900 | |||||||
1901 | if (auto *TD = dyn_cast<TypedefNameDecl>(D)) { | ||||||
1902 | // typedefs can be referenced later on, so the diagnostics are emitted | ||||||
1903 | // at end-of-translation-unit. | ||||||
1904 | UnusedLocalTypedefNameCandidates.insert(TD); | ||||||
1905 | return; | ||||||
1906 | } | ||||||
1907 | |||||||
1908 | FixItHint Hint; | ||||||
1909 | GenerateFixForUnusedDecl(D, Context, Hint); | ||||||
1910 | |||||||
1911 | unsigned DiagID; | ||||||
1912 | if (isa<VarDecl>(D) && cast<VarDecl>(D)->isExceptionVariable()) | ||||||
1913 | DiagID = diag::warn_unused_exception_param; | ||||||
1914 | else if (isa<LabelDecl>(D)) | ||||||
1915 | DiagID = diag::warn_unused_label; | ||||||
1916 | else | ||||||
1917 | DiagID = diag::warn_unused_variable; | ||||||
1918 | |||||||
1919 | Diag(D->getLocation(), DiagID) << D << Hint; | ||||||
1920 | } | ||||||
1921 | |||||||
1922 | void Sema::DiagnoseUnusedButSetDecl(const VarDecl *VD) { | ||||||
1923 | // If it's not referenced, it can't be set. | ||||||
1924 | if (!VD->isReferenced() || !VD->getDeclName() || VD->hasAttr<UnusedAttr>()) | ||||||
1925 | return; | ||||||
1926 | |||||||
1927 | const auto *Ty = VD->getType().getTypePtr()->getBaseElementTypeUnsafe(); | ||||||
1928 | |||||||
1929 | if (Ty->isReferenceType() || Ty->isDependentType()) | ||||||
1930 | return; | ||||||
1931 | |||||||
1932 | if (const TagType *TT = Ty->getAs<TagType>()) { | ||||||
1933 | const TagDecl *Tag = TT->getDecl(); | ||||||
1934 | if (Tag->hasAttr<UnusedAttr>()) | ||||||
1935 | return; | ||||||
1936 | // In C++, don't warn for record types that don't have WarnUnusedAttr, to | ||||||
1937 | // mimic gcc's behavior. | ||||||
1938 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Tag)) { | ||||||
1939 | if (!RD->hasAttr<WarnUnusedAttr>()) | ||||||
1940 | return; | ||||||
1941 | } | ||||||
1942 | } | ||||||
1943 | |||||||
1944 | auto iter = RefsMinusAssignments.find(VD); | ||||||
1945 | if (iter == RefsMinusAssignments.end()) | ||||||
1946 | return; | ||||||
1947 | |||||||
1948 | assert(iter->getSecond() >= 0 &&(static_cast <bool> (iter->getSecond() >= 0 && "Found a negative number of references to a VarDecl") ? void (0) : __assert_fail ("iter->getSecond() >= 0 && \"Found a negative number of references to a VarDecl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1949, __extension__ __PRETTY_FUNCTION__)) | ||||||
1949 | "Found a negative number of references to a VarDecl")(static_cast <bool> (iter->getSecond() >= 0 && "Found a negative number of references to a VarDecl") ? void (0) : __assert_fail ("iter->getSecond() >= 0 && \"Found a negative number of references to a VarDecl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1949, __extension__ __PRETTY_FUNCTION__)); | ||||||
1950 | if (iter->getSecond() != 0) | ||||||
1951 | return; | ||||||
1952 | unsigned DiagID = isa<ParmVarDecl>(VD) ? diag::warn_unused_but_set_parameter | ||||||
1953 | : diag::warn_unused_but_set_variable; | ||||||
1954 | Diag(VD->getLocation(), DiagID) << VD; | ||||||
1955 | } | ||||||
1956 | |||||||
1957 | static void CheckPoppedLabel(LabelDecl *L, Sema &S) { | ||||||
1958 | // Verify that we have no forward references left. If so, there was a goto | ||||||
1959 | // or address of a label taken, but no definition of it. Label fwd | ||||||
1960 | // definitions are indicated with a null substmt which is also not a resolved | ||||||
1961 | // MS inline assembly label name. | ||||||
1962 | bool Diagnose = false; | ||||||
1963 | if (L->isMSAsmLabel()) | ||||||
1964 | Diagnose = !L->isResolvedMSAsmLabel(); | ||||||
1965 | else | ||||||
1966 | Diagnose = L->getStmt() == nullptr; | ||||||
1967 | if (Diagnose) | ||||||
1968 | S.Diag(L->getLocation(), diag::err_undeclared_label_use) << L; | ||||||
1969 | } | ||||||
1970 | |||||||
1971 | void Sema::ActOnPopScope(SourceLocation Loc, Scope *S) { | ||||||
1972 | S->mergeNRVOIntoParent(); | ||||||
1973 | |||||||
1974 | if (S->decl_empty()) return; | ||||||
1975 | assert((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) &&(static_cast <bool> ((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && "Scope shouldn't contain decls!" ) ? void (0) : __assert_fail ("(S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && \"Scope shouldn't contain decls!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1976, __extension__ __PRETTY_FUNCTION__)) | ||||||
1976 | "Scope shouldn't contain decls!")(static_cast <bool> ((S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && "Scope shouldn't contain decls!" ) ? void (0) : __assert_fail ("(S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope)) && \"Scope shouldn't contain decls!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1976, __extension__ __PRETTY_FUNCTION__)); | ||||||
1977 | |||||||
1978 | for (auto *TmpD : S->decls()) { | ||||||
1979 | assert(TmpD && "This decl didn't get pushed??")(static_cast <bool> (TmpD && "This decl didn't get pushed??" ) ? void (0) : __assert_fail ("TmpD && \"This decl didn't get pushed??\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1979, __extension__ __PRETTY_FUNCTION__)); | ||||||
1980 | |||||||
1981 | assert(isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?")(static_cast <bool> (isa<NamedDecl>(TmpD) && "Decl isn't NamedDecl?") ? void (0) : __assert_fail ("isa<NamedDecl>(TmpD) && \"Decl isn't NamedDecl?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 1981, __extension__ __PRETTY_FUNCTION__)); | ||||||
1982 | NamedDecl *D = cast<NamedDecl>(TmpD); | ||||||
1983 | |||||||
1984 | // Diagnose unused variables in this scope. | ||||||
1985 | if (!S->hasUnrecoverableErrorOccurred()) { | ||||||
1986 | DiagnoseUnusedDecl(D); | ||||||
1987 | if (const auto *RD = dyn_cast<RecordDecl>(D)) | ||||||
1988 | DiagnoseUnusedNestedTypedefs(RD); | ||||||
1989 | if (VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
1990 | DiagnoseUnusedButSetDecl(VD); | ||||||
1991 | RefsMinusAssignments.erase(VD); | ||||||
1992 | } | ||||||
1993 | } | ||||||
1994 | |||||||
1995 | if (!D->getDeclName()) continue; | ||||||
1996 | |||||||
1997 | // If this was a forward reference to a label, verify it was defined. | ||||||
1998 | if (LabelDecl *LD = dyn_cast<LabelDecl>(D)) | ||||||
1999 | CheckPoppedLabel(LD, *this); | ||||||
2000 | |||||||
2001 | // Remove this name from our lexical scope, and warn on it if we haven't | ||||||
2002 | // already. | ||||||
2003 | IdResolver.RemoveDecl(D); | ||||||
2004 | auto ShadowI = ShadowingDecls.find(D); | ||||||
2005 | if (ShadowI != ShadowingDecls.end()) { | ||||||
2006 | if (const auto *FD = dyn_cast<FieldDecl>(ShadowI->second)) { | ||||||
2007 | Diag(D->getLocation(), diag::warn_ctor_parm_shadows_field) | ||||||
2008 | << D << FD << FD->getParent(); | ||||||
2009 | Diag(FD->getLocation(), diag::note_previous_declaration); | ||||||
2010 | } | ||||||
2011 | ShadowingDecls.erase(ShadowI); | ||||||
2012 | } | ||||||
2013 | } | ||||||
2014 | } | ||||||
2015 | |||||||
2016 | /// Look for an Objective-C class in the translation unit. | ||||||
2017 | /// | ||||||
2018 | /// \param Id The name of the Objective-C class we're looking for. If | ||||||
2019 | /// typo-correction fixes this name, the Id will be updated | ||||||
2020 | /// to the fixed name. | ||||||
2021 | /// | ||||||
2022 | /// \param IdLoc The location of the name in the translation unit. | ||||||
2023 | /// | ||||||
2024 | /// \param DoTypoCorrection If true, this routine will attempt typo correction | ||||||
2025 | /// if there is no class with the given name. | ||||||
2026 | /// | ||||||
2027 | /// \returns The declaration of the named Objective-C class, or NULL if the | ||||||
2028 | /// class could not be found. | ||||||
2029 | ObjCInterfaceDecl *Sema::getObjCInterfaceDecl(IdentifierInfo *&Id, | ||||||
2030 | SourceLocation IdLoc, | ||||||
2031 | bool DoTypoCorrection) { | ||||||
2032 | // The third "scope" argument is 0 since we aren't enabling lazy built-in | ||||||
2033 | // creation from this context. | ||||||
2034 | NamedDecl *IDecl = LookupSingleName(TUScope, Id, IdLoc, LookupOrdinaryName); | ||||||
2035 | |||||||
2036 | if (!IDecl && DoTypoCorrection) { | ||||||
2037 | // Perform typo correction at the given location, but only if we | ||||||
2038 | // find an Objective-C class name. | ||||||
2039 | DeclFilterCCC<ObjCInterfaceDecl> CCC{}; | ||||||
2040 | if (TypoCorrection C = | ||||||
2041 | CorrectTypo(DeclarationNameInfo(Id, IdLoc), LookupOrdinaryName, | ||||||
2042 | TUScope, nullptr, CCC, CTK_ErrorRecovery)) { | ||||||
2043 | diagnoseTypo(C, PDiag(diag::err_undef_interface_suggest) << Id); | ||||||
2044 | IDecl = C.getCorrectionDeclAs<ObjCInterfaceDecl>(); | ||||||
2045 | Id = IDecl->getIdentifier(); | ||||||
2046 | } | ||||||
2047 | } | ||||||
2048 | ObjCInterfaceDecl *Def = dyn_cast_or_null<ObjCInterfaceDecl>(IDecl); | ||||||
2049 | // This routine must always return a class definition, if any. | ||||||
2050 | if (Def && Def->getDefinition()) | ||||||
2051 | Def = Def->getDefinition(); | ||||||
2052 | return Def; | ||||||
2053 | } | ||||||
2054 | |||||||
2055 | /// getNonFieldDeclScope - Retrieves the innermost scope, starting | ||||||
2056 | /// from S, where a non-field would be declared. This routine copes | ||||||
2057 | /// with the difference between C and C++ scoping rules in structs and | ||||||
2058 | /// unions. For example, the following code is well-formed in C but | ||||||
2059 | /// ill-formed in C++: | ||||||
2060 | /// @code | ||||||
2061 | /// struct S6 { | ||||||
2062 | /// enum { BAR } e; | ||||||
2063 | /// }; | ||||||
2064 | /// | ||||||
2065 | /// void test_S6() { | ||||||
2066 | /// struct S6 a; | ||||||
2067 | /// a.e = BAR; | ||||||
2068 | /// } | ||||||
2069 | /// @endcode | ||||||
2070 | /// For the declaration of BAR, this routine will return a different | ||||||
2071 | /// scope. The scope S will be the scope of the unnamed enumeration | ||||||
2072 | /// within S6. In C++, this routine will return the scope associated | ||||||
2073 | /// with S6, because the enumeration's scope is a transparent | ||||||
2074 | /// context but structures can contain non-field names. In C, this | ||||||
2075 | /// routine will return the translation unit scope, since the | ||||||
2076 | /// enumeration's scope is a transparent context and structures cannot | ||||||
2077 | /// contain non-field names. | ||||||
2078 | Scope *Sema::getNonFieldDeclScope(Scope *S) { | ||||||
2079 | while (((S->getFlags() & Scope::DeclScope) == 0) || | ||||||
2080 | (S->getEntity() && S->getEntity()->isTransparentContext()) || | ||||||
2081 | (S->isClassScope() && !getLangOpts().CPlusPlus)) | ||||||
2082 | S = S->getParent(); | ||||||
2083 | return S; | ||||||
2084 | } | ||||||
2085 | |||||||
2086 | static StringRef getHeaderName(Builtin::Context &BuiltinInfo, unsigned ID, | ||||||
2087 | ASTContext::GetBuiltinTypeError Error) { | ||||||
2088 | switch (Error) { | ||||||
2089 | case ASTContext::GE_None: | ||||||
2090 | return ""; | ||||||
2091 | case ASTContext::GE_Missing_type: | ||||||
2092 | return BuiltinInfo.getHeaderName(ID); | ||||||
2093 | case ASTContext::GE_Missing_stdio: | ||||||
2094 | return "stdio.h"; | ||||||
2095 | case ASTContext::GE_Missing_setjmp: | ||||||
2096 | return "setjmp.h"; | ||||||
2097 | case ASTContext::GE_Missing_ucontext: | ||||||
2098 | return "ucontext.h"; | ||||||
2099 | } | ||||||
2100 | llvm_unreachable("unhandled error kind")::llvm::llvm_unreachable_internal("unhandled error kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 2100); | ||||||
2101 | } | ||||||
2102 | |||||||
2103 | FunctionDecl *Sema::CreateBuiltin(IdentifierInfo *II, QualType Type, | ||||||
2104 | unsigned ID, SourceLocation Loc) { | ||||||
2105 | DeclContext *Parent = Context.getTranslationUnitDecl(); | ||||||
2106 | |||||||
2107 | if (getLangOpts().CPlusPlus) { | ||||||
2108 | LinkageSpecDecl *CLinkageDecl = LinkageSpecDecl::Create( | ||||||
2109 | Context, Parent, Loc, Loc, LinkageSpecDecl::lang_c, false); | ||||||
2110 | CLinkageDecl->setImplicit(); | ||||||
2111 | Parent->addDecl(CLinkageDecl); | ||||||
2112 | Parent = CLinkageDecl; | ||||||
2113 | } | ||||||
2114 | |||||||
2115 | FunctionDecl *New = FunctionDecl::Create(Context, Parent, Loc, Loc, II, Type, | ||||||
2116 | /*TInfo=*/nullptr, SC_Extern, | ||||||
2117 | getCurFPFeatures().isFPConstrained(), | ||||||
2118 | false, Type->isFunctionProtoType()); | ||||||
2119 | New->setImplicit(); | ||||||
2120 | New->addAttr(BuiltinAttr::CreateImplicit(Context, ID)); | ||||||
2121 | |||||||
2122 | // Create Decl objects for each parameter, adding them to the | ||||||
2123 | // FunctionDecl. | ||||||
2124 | if (const FunctionProtoType *FT = dyn_cast<FunctionProtoType>(Type)) { | ||||||
2125 | SmallVector<ParmVarDecl *, 16> Params; | ||||||
2126 | for (unsigned i = 0, e = FT->getNumParams(); i != e; ++i) { | ||||||
2127 | ParmVarDecl *parm = ParmVarDecl::Create( | ||||||
2128 | Context, New, SourceLocation(), SourceLocation(), nullptr, | ||||||
2129 | FT->getParamType(i), /*TInfo=*/nullptr, SC_None, nullptr); | ||||||
2130 | parm->setScopeInfo(0, i); | ||||||
2131 | Params.push_back(parm); | ||||||
2132 | } | ||||||
2133 | New->setParams(Params); | ||||||
2134 | } | ||||||
2135 | |||||||
2136 | AddKnownFunctionAttributes(New); | ||||||
2137 | return New; | ||||||
2138 | } | ||||||
2139 | |||||||
2140 | /// LazilyCreateBuiltin - The specified Builtin-ID was first used at | ||||||
2141 | /// file scope. lazily create a decl for it. ForRedeclaration is true | ||||||
2142 | /// if we're creating this built-in in anticipation of redeclaring the | ||||||
2143 | /// built-in. | ||||||
2144 | NamedDecl *Sema::LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, | ||||||
2145 | Scope *S, bool ForRedeclaration, | ||||||
2146 | SourceLocation Loc) { | ||||||
2147 | LookupNecessaryTypesForBuiltin(S, ID); | ||||||
2148 | |||||||
2149 | ASTContext::GetBuiltinTypeError Error; | ||||||
2150 | QualType R = Context.GetBuiltinType(ID, Error); | ||||||
2151 | if (Error) { | ||||||
2152 | if (!ForRedeclaration) | ||||||
2153 | return nullptr; | ||||||
2154 | |||||||
2155 | // If we have a builtin without an associated type we should not emit a | ||||||
2156 | // warning when we were not able to find a type for it. | ||||||
2157 | if (Error == ASTContext::GE_Missing_type || | ||||||
2158 | Context.BuiltinInfo.allowTypeMismatch(ID)) | ||||||
2159 | return nullptr; | ||||||
2160 | |||||||
2161 | // If we could not find a type for setjmp it is because the jmp_buf type was | ||||||
2162 | // not defined prior to the setjmp declaration. | ||||||
2163 | if (Error == ASTContext::GE_Missing_setjmp) { | ||||||
2164 | Diag(Loc, diag::warn_implicit_decl_no_jmp_buf) | ||||||
2165 | << Context.BuiltinInfo.getName(ID); | ||||||
2166 | return nullptr; | ||||||
2167 | } | ||||||
2168 | |||||||
2169 | // Generally, we emit a warning that the declaration requires the | ||||||
2170 | // appropriate header. | ||||||
2171 | Diag(Loc, diag::warn_implicit_decl_requires_sysheader) | ||||||
2172 | << getHeaderName(Context.BuiltinInfo, ID, Error) | ||||||
2173 | << Context.BuiltinInfo.getName(ID); | ||||||
2174 | return nullptr; | ||||||
2175 | } | ||||||
2176 | |||||||
2177 | if (!ForRedeclaration && | ||||||
2178 | (Context.BuiltinInfo.isPredefinedLibFunction(ID) || | ||||||
2179 | Context.BuiltinInfo.isHeaderDependentFunction(ID))) { | ||||||
2180 | Diag(Loc, diag::ext_implicit_lib_function_decl) | ||||||
2181 | << Context.BuiltinInfo.getName(ID) << R; | ||||||
2182 | if (const char *Header = Context.BuiltinInfo.getHeaderName(ID)) | ||||||
2183 | Diag(Loc, diag::note_include_header_or_declare) | ||||||
2184 | << Header << Context.BuiltinInfo.getName(ID); | ||||||
2185 | } | ||||||
2186 | |||||||
2187 | if (R.isNull()) | ||||||
2188 | return nullptr; | ||||||
2189 | |||||||
2190 | FunctionDecl *New = CreateBuiltin(II, R, ID, Loc); | ||||||
2191 | RegisterLocallyScopedExternCDecl(New, S); | ||||||
2192 | |||||||
2193 | // TUScope is the translation-unit scope to insert this function into. | ||||||
2194 | // FIXME: This is hideous. We need to teach PushOnScopeChains to | ||||||
2195 | // relate Scopes to DeclContexts, and probably eliminate CurContext | ||||||
2196 | // entirely, but we're not there yet. | ||||||
2197 | DeclContext *SavedContext = CurContext; | ||||||
2198 | CurContext = New->getDeclContext(); | ||||||
2199 | PushOnScopeChains(New, TUScope); | ||||||
2200 | CurContext = SavedContext; | ||||||
2201 | return New; | ||||||
2202 | } | ||||||
2203 | |||||||
2204 | /// Typedef declarations don't have linkage, but they still denote the same | ||||||
2205 | /// entity if their types are the same. | ||||||
2206 | /// FIXME: This is notionally doing the same thing as ASTReaderDecl's | ||||||
2207 | /// isSameEntity. | ||||||
2208 | static void filterNonConflictingPreviousTypedefDecls(Sema &S, | ||||||
2209 | TypedefNameDecl *Decl, | ||||||
2210 | LookupResult &Previous) { | ||||||
2211 | // This is only interesting when modules are enabled. | ||||||
2212 | if (!S.getLangOpts().Modules && !S.getLangOpts().ModulesLocalVisibility) | ||||||
2213 | return; | ||||||
2214 | |||||||
2215 | // Empty sets are uninteresting. | ||||||
2216 | if (Previous.empty()) | ||||||
2217 | return; | ||||||
2218 | |||||||
2219 | LookupResult::Filter Filter = Previous.makeFilter(); | ||||||
2220 | while (Filter.hasNext()) { | ||||||
2221 | NamedDecl *Old = Filter.next(); | ||||||
2222 | |||||||
2223 | // Non-hidden declarations are never ignored. | ||||||
2224 | if (S.isVisible(Old)) | ||||||
2225 | continue; | ||||||
2226 | |||||||
2227 | // Declarations of the same entity are not ignored, even if they have | ||||||
2228 | // different linkages. | ||||||
2229 | if (auto *OldTD = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2230 | if (S.Context.hasSameType(OldTD->getUnderlyingType(), | ||||||
2231 | Decl->getUnderlyingType())) | ||||||
2232 | continue; | ||||||
2233 | |||||||
2234 | // If both declarations give a tag declaration a typedef name for linkage | ||||||
2235 | // purposes, then they declare the same entity. | ||||||
2236 | if (OldTD->getAnonDeclWithTypedefName(/*AnyRedecl*/true) && | ||||||
2237 | Decl->getAnonDeclWithTypedefName()) | ||||||
2238 | continue; | ||||||
2239 | } | ||||||
2240 | |||||||
2241 | Filter.erase(); | ||||||
2242 | } | ||||||
2243 | |||||||
2244 | Filter.done(); | ||||||
2245 | } | ||||||
2246 | |||||||
2247 | bool Sema::isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New) { | ||||||
2248 | QualType OldType; | ||||||
2249 | if (TypedefNameDecl *OldTypedef = dyn_cast<TypedefNameDecl>(Old)) | ||||||
2250 | OldType = OldTypedef->getUnderlyingType(); | ||||||
2251 | else | ||||||
2252 | OldType = Context.getTypeDeclType(Old); | ||||||
2253 | QualType NewType = New->getUnderlyingType(); | ||||||
2254 | |||||||
2255 | if (NewType->isVariablyModifiedType()) { | ||||||
2256 | // Must not redefine a typedef with a variably-modified type. | ||||||
2257 | int Kind = isa<TypeAliasDecl>(Old) ? 1 : 0; | ||||||
2258 | Diag(New->getLocation(), diag::err_redefinition_variably_modified_typedef) | ||||||
2259 | << Kind << NewType; | ||||||
2260 | if (Old->getLocation().isValid()) | ||||||
2261 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2262 | New->setInvalidDecl(); | ||||||
2263 | return true; | ||||||
2264 | } | ||||||
2265 | |||||||
2266 | if (OldType != NewType && | ||||||
2267 | !OldType->isDependentType() && | ||||||
2268 | !NewType->isDependentType() && | ||||||
2269 | !Context.hasSameType(OldType, NewType)) { | ||||||
2270 | int Kind = isa<TypeAliasDecl>(Old) ? 1 : 0; | ||||||
2271 | Diag(New->getLocation(), diag::err_redefinition_different_typedef) | ||||||
2272 | << Kind << NewType << OldType; | ||||||
2273 | if (Old->getLocation().isValid()) | ||||||
2274 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2275 | New->setInvalidDecl(); | ||||||
2276 | return true; | ||||||
2277 | } | ||||||
2278 | return false; | ||||||
2279 | } | ||||||
2280 | |||||||
2281 | /// MergeTypedefNameDecl - We just parsed a typedef 'New' which has the | ||||||
2282 | /// same name and scope as a previous declaration 'Old'. Figure out | ||||||
2283 | /// how to resolve this situation, merging decls or emitting | ||||||
2284 | /// diagnostics as appropriate. If there was an error, set New to be invalid. | ||||||
2285 | /// | ||||||
2286 | void Sema::MergeTypedefNameDecl(Scope *S, TypedefNameDecl *New, | ||||||
2287 | LookupResult &OldDecls) { | ||||||
2288 | // If the new decl is known invalid already, don't bother doing any | ||||||
2289 | // merging checks. | ||||||
2290 | if (New->isInvalidDecl()) return; | ||||||
2291 | |||||||
2292 | // Allow multiple definitions for ObjC built-in typedefs. | ||||||
2293 | // FIXME: Verify the underlying types are equivalent! | ||||||
2294 | if (getLangOpts().ObjC) { | ||||||
2295 | const IdentifierInfo *TypeID = New->getIdentifier(); | ||||||
2296 | switch (TypeID->getLength()) { | ||||||
2297 | default: break; | ||||||
2298 | case 2: | ||||||
2299 | { | ||||||
2300 | if (!TypeID->isStr("id")) | ||||||
2301 | break; | ||||||
2302 | QualType T = New->getUnderlyingType(); | ||||||
2303 | if (!T->isPointerType()) | ||||||
2304 | break; | ||||||
2305 | if (!T->isVoidPointerType()) { | ||||||
2306 | QualType PT = T->castAs<PointerType>()->getPointeeType(); | ||||||
2307 | if (!PT->isStructureType()) | ||||||
2308 | break; | ||||||
2309 | } | ||||||
2310 | Context.setObjCIdRedefinitionType(T); | ||||||
2311 | // Install the built-in type for 'id', ignoring the current definition. | ||||||
2312 | New->setTypeForDecl(Context.getObjCIdType().getTypePtr()); | ||||||
2313 | return; | ||||||
2314 | } | ||||||
2315 | case 5: | ||||||
2316 | if (!TypeID->isStr("Class")) | ||||||
2317 | break; | ||||||
2318 | Context.setObjCClassRedefinitionType(New->getUnderlyingType()); | ||||||
2319 | // Install the built-in type for 'Class', ignoring the current definition. | ||||||
2320 | New->setTypeForDecl(Context.getObjCClassType().getTypePtr()); | ||||||
2321 | return; | ||||||
2322 | case 3: | ||||||
2323 | if (!TypeID->isStr("SEL")) | ||||||
2324 | break; | ||||||
2325 | Context.setObjCSelRedefinitionType(New->getUnderlyingType()); | ||||||
2326 | // Install the built-in type for 'SEL', ignoring the current definition. | ||||||
2327 | New->setTypeForDecl(Context.getObjCSelType().getTypePtr()); | ||||||
2328 | return; | ||||||
2329 | } | ||||||
2330 | // Fall through - the typedef name was not a builtin type. | ||||||
2331 | } | ||||||
2332 | |||||||
2333 | // Verify the old decl was also a type. | ||||||
2334 | TypeDecl *Old = OldDecls.getAsSingle<TypeDecl>(); | ||||||
2335 | if (!Old) { | ||||||
2336 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
2337 | << New->getDeclName(); | ||||||
2338 | |||||||
2339 | NamedDecl *OldD = OldDecls.getRepresentativeDecl(); | ||||||
2340 | if (OldD->getLocation().isValid()) | ||||||
2341 | notePreviousDefinition(OldD, New->getLocation()); | ||||||
2342 | |||||||
2343 | return New->setInvalidDecl(); | ||||||
2344 | } | ||||||
2345 | |||||||
2346 | // If the old declaration is invalid, just give up here. | ||||||
2347 | if (Old->isInvalidDecl()) | ||||||
2348 | return New->setInvalidDecl(); | ||||||
2349 | |||||||
2350 | if (auto *OldTD = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2351 | auto *OldTag = OldTD->getAnonDeclWithTypedefName(/*AnyRedecl*/true); | ||||||
2352 | auto *NewTag = New->getAnonDeclWithTypedefName(); | ||||||
2353 | NamedDecl *Hidden = nullptr; | ||||||
2354 | if (OldTag && NewTag && | ||||||
2355 | OldTag->getCanonicalDecl() != NewTag->getCanonicalDecl() && | ||||||
2356 | !hasVisibleDefinition(OldTag, &Hidden)) { | ||||||
2357 | // There is a definition of this tag, but it is not visible. Use it | ||||||
2358 | // instead of our tag. | ||||||
2359 | New->setTypeForDecl(OldTD->getTypeForDecl()); | ||||||
2360 | if (OldTD->isModed()) | ||||||
2361 | New->setModedTypeSourceInfo(OldTD->getTypeSourceInfo(), | ||||||
2362 | OldTD->getUnderlyingType()); | ||||||
2363 | else | ||||||
2364 | New->setTypeSourceInfo(OldTD->getTypeSourceInfo()); | ||||||
2365 | |||||||
2366 | // Make the old tag definition visible. | ||||||
2367 | makeMergedDefinitionVisible(Hidden); | ||||||
2368 | |||||||
2369 | // If this was an unscoped enumeration, yank all of its enumerators | ||||||
2370 | // out of the scope. | ||||||
2371 | if (isa<EnumDecl>(NewTag)) { | ||||||
2372 | Scope *EnumScope = getNonFieldDeclScope(S); | ||||||
2373 | for (auto *D : NewTag->decls()) { | ||||||
2374 | auto *ED = cast<EnumConstantDecl>(D); | ||||||
2375 | assert(EnumScope->isDeclScope(ED))(static_cast <bool> (EnumScope->isDeclScope(ED)) ? void (0) : __assert_fail ("EnumScope->isDeclScope(ED)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 2375, __extension__ __PRETTY_FUNCTION__)); | ||||||
2376 | EnumScope->RemoveDecl(ED); | ||||||
2377 | IdResolver.RemoveDecl(ED); | ||||||
2378 | ED->getLexicalDeclContext()->removeDecl(ED); | ||||||
2379 | } | ||||||
2380 | } | ||||||
2381 | } | ||||||
2382 | } | ||||||
2383 | |||||||
2384 | // If the typedef types are not identical, reject them in all languages and | ||||||
2385 | // with any extensions enabled. | ||||||
2386 | if (isIncompatibleTypedef(Old, New)) | ||||||
2387 | return; | ||||||
2388 | |||||||
2389 | // The types match. Link up the redeclaration chain and merge attributes if | ||||||
2390 | // the old declaration was a typedef. | ||||||
2391 | if (TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Old)) { | ||||||
2392 | New->setPreviousDecl(Typedef); | ||||||
2393 | mergeDeclAttributes(New, Old); | ||||||
2394 | } | ||||||
2395 | |||||||
2396 | if (getLangOpts().MicrosoftExt) | ||||||
2397 | return; | ||||||
2398 | |||||||
2399 | if (getLangOpts().CPlusPlus) { | ||||||
2400 | // C++ [dcl.typedef]p2: | ||||||
2401 | // In a given non-class scope, a typedef specifier can be used to | ||||||
2402 | // redefine the name of any type declared in that scope to refer | ||||||
2403 | // to the type to which it already refers. | ||||||
2404 | if (!isa<CXXRecordDecl>(CurContext)) | ||||||
2405 | return; | ||||||
2406 | |||||||
2407 | // C++0x [dcl.typedef]p4: | ||||||
2408 | // In a given class scope, a typedef specifier can be used to redefine | ||||||
2409 | // any class-name declared in that scope that is not also a typedef-name | ||||||
2410 | // to refer to the type to which it already refers. | ||||||
2411 | // | ||||||
2412 | // This wording came in via DR424, which was a correction to the | ||||||
2413 | // wording in DR56, which accidentally banned code like: | ||||||
2414 | // | ||||||
2415 | // struct S { | ||||||
2416 | // typedef struct A { } A; | ||||||
2417 | // }; | ||||||
2418 | // | ||||||
2419 | // in the C++03 standard. We implement the C++0x semantics, which | ||||||
2420 | // allow the above but disallow | ||||||
2421 | // | ||||||
2422 | // struct S { | ||||||
2423 | // typedef int I; | ||||||
2424 | // typedef int I; | ||||||
2425 | // }; | ||||||
2426 | // | ||||||
2427 | // since that was the intent of DR56. | ||||||
2428 | if (!isa<TypedefNameDecl>(Old)) | ||||||
2429 | return; | ||||||
2430 | |||||||
2431 | Diag(New->getLocation(), diag::err_redefinition) | ||||||
2432 | << New->getDeclName(); | ||||||
2433 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2434 | return New->setInvalidDecl(); | ||||||
2435 | } | ||||||
2436 | |||||||
2437 | // Modules always permit redefinition of typedefs, as does C11. | ||||||
2438 | if (getLangOpts().Modules || getLangOpts().C11) | ||||||
2439 | return; | ||||||
2440 | |||||||
2441 | // If we have a redefinition of a typedef in C, emit a warning. This warning | ||||||
2442 | // is normally mapped to an error, but can be controlled with | ||||||
2443 | // -Wtypedef-redefinition. If either the original or the redefinition is | ||||||
2444 | // in a system header, don't emit this for compatibility with GCC. | ||||||
2445 | if (getDiagnostics().getSuppressSystemWarnings() && | ||||||
2446 | // Some standard types are defined implicitly in Clang (e.g. OpenCL). | ||||||
2447 | (Old->isImplicit() || | ||||||
2448 | Context.getSourceManager().isInSystemHeader(Old->getLocation()) || | ||||||
2449 | Context.getSourceManager().isInSystemHeader(New->getLocation()))) | ||||||
2450 | return; | ||||||
2451 | |||||||
2452 | Diag(New->getLocation(), diag::ext_redefinition_of_typedef) | ||||||
2453 | << New->getDeclName(); | ||||||
2454 | notePreviousDefinition(Old, New->getLocation()); | ||||||
2455 | } | ||||||
2456 | |||||||
2457 | /// DeclhasAttr - returns true if decl Declaration already has the target | ||||||
2458 | /// attribute. | ||||||
2459 | static bool DeclHasAttr(const Decl *D, const Attr *A) { | ||||||
2460 | const OwnershipAttr *OA = dyn_cast<OwnershipAttr>(A); | ||||||
2461 | const AnnotateAttr *Ann = dyn_cast<AnnotateAttr>(A); | ||||||
2462 | for (const auto *i : D->attrs()) | ||||||
2463 | if (i->getKind() == A->getKind()) { | ||||||
2464 | if (Ann) { | ||||||
2465 | if (Ann->getAnnotation() == cast<AnnotateAttr>(i)->getAnnotation()) | ||||||
2466 | return true; | ||||||
2467 | continue; | ||||||
2468 | } | ||||||
2469 | // FIXME: Don't hardcode this check | ||||||
2470 | if (OA && isa<OwnershipAttr>(i)) | ||||||
2471 | return OA->getOwnKind() == cast<OwnershipAttr>(i)->getOwnKind(); | ||||||
2472 | return true; | ||||||
2473 | } | ||||||
2474 | |||||||
2475 | return false; | ||||||
2476 | } | ||||||
2477 | |||||||
2478 | static bool isAttributeTargetADefinition(Decl *D) { | ||||||
2479 | if (VarDecl *VD = dyn_cast<VarDecl>(D)) | ||||||
2480 | return VD->isThisDeclarationADefinition(); | ||||||
2481 | if (TagDecl *TD = dyn_cast<TagDecl>(D)) | ||||||
2482 | return TD->isCompleteDefinition() || TD->isBeingDefined(); | ||||||
2483 | return true; | ||||||
2484 | } | ||||||
2485 | |||||||
2486 | /// Merge alignment attributes from \p Old to \p New, taking into account the | ||||||
2487 | /// special semantics of C11's _Alignas specifier and C++11's alignas attribute. | ||||||
2488 | /// | ||||||
2489 | /// \return \c true if any attributes were added to \p New. | ||||||
2490 | static bool mergeAlignedAttrs(Sema &S, NamedDecl *New, Decl *Old) { | ||||||
2491 | // Look for alignas attributes on Old, and pick out whichever attribute | ||||||
2492 | // specifies the strictest alignment requirement. | ||||||
2493 | AlignedAttr *OldAlignasAttr = nullptr; | ||||||
2494 | AlignedAttr *OldStrictestAlignAttr = nullptr; | ||||||
2495 | unsigned OldAlign = 0; | ||||||
2496 | for (auto *I : Old->specific_attrs<AlignedAttr>()) { | ||||||
2497 | // FIXME: We have no way of representing inherited dependent alignments | ||||||
2498 | // in a case like: | ||||||
2499 | // template<int A, int B> struct alignas(A) X; | ||||||
2500 | // template<int A, int B> struct alignas(B) X {}; | ||||||
2501 | // For now, we just ignore any alignas attributes which are not on the | ||||||
2502 | // definition in such a case. | ||||||
2503 | if (I->isAlignmentDependent()) | ||||||
2504 | return false; | ||||||
2505 | |||||||
2506 | if (I->isAlignas()) | ||||||
2507 | OldAlignasAttr = I; | ||||||
2508 | |||||||
2509 | unsigned Align = I->getAlignment(S.Context); | ||||||
2510 | if (Align > OldAlign) { | ||||||
2511 | OldAlign = Align; | ||||||
2512 | OldStrictestAlignAttr = I; | ||||||
2513 | } | ||||||
2514 | } | ||||||
2515 | |||||||
2516 | // Look for alignas attributes on New. | ||||||
2517 | AlignedAttr *NewAlignasAttr = nullptr; | ||||||
2518 | unsigned NewAlign = 0; | ||||||
2519 | for (auto *I : New->specific_attrs<AlignedAttr>()) { | ||||||
2520 | if (I->isAlignmentDependent()) | ||||||
2521 | return false; | ||||||
2522 | |||||||
2523 | if (I->isAlignas()) | ||||||
2524 | NewAlignasAttr = I; | ||||||
2525 | |||||||
2526 | unsigned Align = I->getAlignment(S.Context); | ||||||
2527 | if (Align > NewAlign) | ||||||
2528 | NewAlign = Align; | ||||||
2529 | } | ||||||
2530 | |||||||
2531 | if (OldAlignasAttr && NewAlignasAttr && OldAlign != NewAlign) { | ||||||
2532 | // Both declarations have 'alignas' attributes. We require them to match. | ||||||
2533 | // C++11 [dcl.align]p6 and C11 6.7.5/7 both come close to saying this, but | ||||||
2534 | // fall short. (If two declarations both have alignas, they must both match | ||||||
2535 | // every definition, and so must match each other if there is a definition.) | ||||||
2536 | |||||||
2537 | // If either declaration only contains 'alignas(0)' specifiers, then it | ||||||
2538 | // specifies the natural alignment for the type. | ||||||
2539 | if (OldAlign == 0 || NewAlign == 0) { | ||||||
2540 | QualType Ty; | ||||||
2541 | if (ValueDecl *VD = dyn_cast<ValueDecl>(New)) | ||||||
2542 | Ty = VD->getType(); | ||||||
2543 | else | ||||||
2544 | Ty = S.Context.getTagDeclType(cast<TagDecl>(New)); | ||||||
2545 | |||||||
2546 | if (OldAlign == 0) | ||||||
2547 | OldAlign = S.Context.getTypeAlign(Ty); | ||||||
2548 | if (NewAlign == 0) | ||||||
2549 | NewAlign = S.Context.getTypeAlign(Ty); | ||||||
2550 | } | ||||||
2551 | |||||||
2552 | if (OldAlign != NewAlign) { | ||||||
2553 | S.Diag(NewAlignasAttr->getLocation(), diag::err_alignas_mismatch) | ||||||
2554 | << (unsigned)S.Context.toCharUnitsFromBits(OldAlign).getQuantity() | ||||||
2555 | << (unsigned)S.Context.toCharUnitsFromBits(NewAlign).getQuantity(); | ||||||
2556 | S.Diag(OldAlignasAttr->getLocation(), diag::note_previous_declaration); | ||||||
2557 | } | ||||||
2558 | } | ||||||
2559 | |||||||
2560 | if (OldAlignasAttr && !NewAlignasAttr && isAttributeTargetADefinition(New)) { | ||||||
2561 | // C++11 [dcl.align]p6: | ||||||
2562 | // if any declaration of an entity has an alignment-specifier, | ||||||
2563 | // every defining declaration of that entity shall specify an | ||||||
2564 | // equivalent alignment. | ||||||
2565 | // C11 6.7.5/7: | ||||||
2566 | // If the definition of an object does not have an alignment | ||||||
2567 | // specifier, any other declaration of that object shall also | ||||||
2568 | // have no alignment specifier. | ||||||
2569 | S.Diag(New->getLocation(), diag::err_alignas_missing_on_definition) | ||||||
2570 | << OldAlignasAttr; | ||||||
2571 | S.Diag(OldAlignasAttr->getLocation(), diag::note_alignas_on_declaration) | ||||||
2572 | << OldAlignasAttr; | ||||||
2573 | } | ||||||
2574 | |||||||
2575 | bool AnyAdded = false; | ||||||
2576 | |||||||
2577 | // Ensure we have an attribute representing the strictest alignment. | ||||||
2578 | if (OldAlign > NewAlign) { | ||||||
2579 | AlignedAttr *Clone = OldStrictestAlignAttr->clone(S.Context); | ||||||
2580 | Clone->setInherited(true); | ||||||
2581 | New->addAttr(Clone); | ||||||
2582 | AnyAdded = true; | ||||||
2583 | } | ||||||
2584 | |||||||
2585 | // Ensure we have an alignas attribute if the old declaration had one. | ||||||
2586 | if (OldAlignasAttr && !NewAlignasAttr && | ||||||
2587 | !(AnyAdded && OldStrictestAlignAttr->isAlignas())) { | ||||||
2588 | AlignedAttr *Clone = OldAlignasAttr->clone(S.Context); | ||||||
2589 | Clone->setInherited(true); | ||||||
2590 | New->addAttr(Clone); | ||||||
2591 | AnyAdded = true; | ||||||
2592 | } | ||||||
2593 | |||||||
2594 | return AnyAdded; | ||||||
2595 | } | ||||||
2596 | |||||||
2597 | #define WANT_DECL_MERGE_LOGIC | ||||||
2598 | #include "clang/Sema/AttrParsedAttrImpl.inc" | ||||||
2599 | #undef WANT_DECL_MERGE_LOGIC | ||||||
2600 | |||||||
2601 | static bool mergeDeclAttribute(Sema &S, NamedDecl *D, | ||||||
2602 | const InheritableAttr *Attr, | ||||||
2603 | Sema::AvailabilityMergeKind AMK) { | ||||||
2604 | // Diagnose any mutual exclusions between the attribute that we want to add | ||||||
2605 | // and attributes that already exist on the declaration. | ||||||
2606 | if (!DiagnoseMutualExclusions(S, D, Attr)) | ||||||
2607 | return false; | ||||||
2608 | |||||||
2609 | // This function copies an attribute Attr from a previous declaration to the | ||||||
2610 | // new declaration D if the new declaration doesn't itself have that attribute | ||||||
2611 | // yet or if that attribute allows duplicates. | ||||||
2612 | // If you're adding a new attribute that requires logic different from | ||||||
2613 | // "use explicit attribute on decl if present, else use attribute from | ||||||
2614 | // previous decl", for example if the attribute needs to be consistent | ||||||
2615 | // between redeclarations, you need to call a custom merge function here. | ||||||
2616 | InheritableAttr *NewAttr = nullptr; | ||||||
2617 | if (const auto *AA = dyn_cast<AvailabilityAttr>(Attr)) | ||||||
2618 | NewAttr = S.mergeAvailabilityAttr( | ||||||
2619 | D, *AA, AA->getPlatform(), AA->isImplicit(), AA->getIntroduced(), | ||||||
2620 | AA->getDeprecated(), AA->getObsoleted(), AA->getUnavailable(), | ||||||
2621 | AA->getMessage(), AA->getStrict(), AA->getReplacement(), AMK, | ||||||
2622 | AA->getPriority()); | ||||||
2623 | else if (const auto *VA = dyn_cast<VisibilityAttr>(Attr)) | ||||||
2624 | NewAttr = S.mergeVisibilityAttr(D, *VA, VA->getVisibility()); | ||||||
2625 | else if (const auto *VA = dyn_cast<TypeVisibilityAttr>(Attr)) | ||||||
2626 | NewAttr = S.mergeTypeVisibilityAttr(D, *VA, VA->getVisibility()); | ||||||
2627 | else if (const auto *ImportA = dyn_cast<DLLImportAttr>(Attr)) | ||||||
2628 | NewAttr = S.mergeDLLImportAttr(D, *ImportA); | ||||||
2629 | else if (const auto *ExportA = dyn_cast<DLLExportAttr>(Attr)) | ||||||
2630 | NewAttr = S.mergeDLLExportAttr(D, *ExportA); | ||||||
2631 | else if (const auto *EA = dyn_cast<ErrorAttr>(Attr)) | ||||||
2632 | NewAttr = S.mergeErrorAttr(D, *EA, EA->getUserDiagnostic()); | ||||||
2633 | else if (const auto *FA = dyn_cast<FormatAttr>(Attr)) | ||||||
2634 | NewAttr = S.mergeFormatAttr(D, *FA, FA->getType(), FA->getFormatIdx(), | ||||||
2635 | FA->getFirstArg()); | ||||||
2636 | else if (const auto *SA = dyn_cast<SectionAttr>(Attr)) | ||||||
2637 | NewAttr = S.mergeSectionAttr(D, *SA, SA->getName()); | ||||||
2638 | else if (const auto *CSA = dyn_cast<CodeSegAttr>(Attr)) | ||||||
2639 | NewAttr = S.mergeCodeSegAttr(D, *CSA, CSA->getName()); | ||||||
2640 | else if (const auto *IA = dyn_cast<MSInheritanceAttr>(Attr)) | ||||||
2641 | NewAttr = S.mergeMSInheritanceAttr(D, *IA, IA->getBestCase(), | ||||||
2642 | IA->getInheritanceModel()); | ||||||
2643 | else if (const auto *AA = dyn_cast<AlwaysInlineAttr>(Attr)) | ||||||
2644 | NewAttr = S.mergeAlwaysInlineAttr(D, *AA, | ||||||
2645 | &S.Context.Idents.get(AA->getSpelling())); | ||||||
2646 | else if (S.getLangOpts().CUDA && isa<FunctionDecl>(D) && | ||||||
2647 | (isa<CUDAHostAttr>(Attr) || isa<CUDADeviceAttr>(Attr) || | ||||||
2648 | isa<CUDAGlobalAttr>(Attr))) { | ||||||
2649 | // CUDA target attributes are part of function signature for | ||||||
2650 | // overloading purposes and must not be merged. | ||||||
2651 | return false; | ||||||
2652 | } else if (const auto *MA = dyn_cast<MinSizeAttr>(Attr)) | ||||||
2653 | NewAttr = S.mergeMinSizeAttr(D, *MA); | ||||||
2654 | else if (const auto *SNA = dyn_cast<SwiftNameAttr>(Attr)) | ||||||
2655 | NewAttr = S.mergeSwiftNameAttr(D, *SNA, SNA->getName()); | ||||||
2656 | else if (const auto *OA = dyn_cast<OptimizeNoneAttr>(Attr)) | ||||||
2657 | NewAttr = S.mergeOptimizeNoneAttr(D, *OA); | ||||||
2658 | else if (const auto *InternalLinkageA = dyn_cast<InternalLinkageAttr>(Attr)) | ||||||
2659 | NewAttr = S.mergeInternalLinkageAttr(D, *InternalLinkageA); | ||||||
2660 | else if (isa<AlignedAttr>(Attr)) | ||||||
2661 | // AlignedAttrs are handled separately, because we need to handle all | ||||||
2662 | // such attributes on a declaration at the same time. | ||||||
2663 | NewAttr = nullptr; | ||||||
2664 | else if ((isa<DeprecatedAttr>(Attr) || isa<UnavailableAttr>(Attr)) && | ||||||
2665 | (AMK == Sema::AMK_Override || | ||||||
2666 | AMK == Sema::AMK_ProtocolImplementation || | ||||||
2667 | AMK == Sema::AMK_OptionalProtocolImplementation)) | ||||||
2668 | NewAttr = nullptr; | ||||||
2669 | else if (const auto *UA = dyn_cast<UuidAttr>(Attr)) | ||||||
2670 | NewAttr = S.mergeUuidAttr(D, *UA, UA->getGuid(), UA->getGuidDecl()); | ||||||
2671 | else if (const auto *IMA = dyn_cast<WebAssemblyImportModuleAttr>(Attr)) | ||||||
2672 | NewAttr = S.mergeImportModuleAttr(D, *IMA); | ||||||
2673 | else if (const auto *INA = dyn_cast<WebAssemblyImportNameAttr>(Attr)) | ||||||
2674 | NewAttr = S.mergeImportNameAttr(D, *INA); | ||||||
2675 | else if (const auto *TCBA = dyn_cast<EnforceTCBAttr>(Attr)) | ||||||
2676 | NewAttr = S.mergeEnforceTCBAttr(D, *TCBA); | ||||||
2677 | else if (const auto *TCBLA = dyn_cast<EnforceTCBLeafAttr>(Attr)) | ||||||
2678 | NewAttr = S.mergeEnforceTCBLeafAttr(D, *TCBLA); | ||||||
2679 | else if (const auto *BTFA = dyn_cast<BTFTagAttr>(Attr)) | ||||||
2680 | NewAttr = S.mergeBTFTagAttr(D, *BTFA); | ||||||
2681 | else if (Attr->shouldInheritEvenIfAlreadyPresent() || !DeclHasAttr(D, Attr)) | ||||||
2682 | NewAttr = cast<InheritableAttr>(Attr->clone(S.Context)); | ||||||
2683 | |||||||
2684 | if (NewAttr) { | ||||||
2685 | NewAttr->setInherited(true); | ||||||
2686 | D->addAttr(NewAttr); | ||||||
2687 | if (isa<MSInheritanceAttr>(NewAttr)) | ||||||
2688 | S.Consumer.AssignInheritanceModel(cast<CXXRecordDecl>(D)); | ||||||
2689 | return true; | ||||||
2690 | } | ||||||
2691 | |||||||
2692 | return false; | ||||||
2693 | } | ||||||
2694 | |||||||
2695 | static const NamedDecl *getDefinition(const Decl *D) { | ||||||
2696 | if (const TagDecl *TD = dyn_cast<TagDecl>(D)) | ||||||
2697 | return TD->getDefinition(); | ||||||
2698 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { | ||||||
2699 | const VarDecl *Def = VD->getDefinition(); | ||||||
2700 | if (Def) | ||||||
2701 | return Def; | ||||||
2702 | return VD->getActingDefinition(); | ||||||
2703 | } | ||||||
2704 | if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { | ||||||
2705 | const FunctionDecl *Def = nullptr; | ||||||
2706 | if (FD->isDefined(Def, true)) | ||||||
2707 | return Def; | ||||||
2708 | } | ||||||
2709 | return nullptr; | ||||||
2710 | } | ||||||
2711 | |||||||
2712 | static bool hasAttribute(const Decl *D, attr::Kind Kind) { | ||||||
2713 | for (const auto *Attribute : D->attrs()) | ||||||
2714 | if (Attribute->getKind() == Kind) | ||||||
2715 | return true; | ||||||
2716 | return false; | ||||||
2717 | } | ||||||
2718 | |||||||
2719 | /// checkNewAttributesAfterDef - If we already have a definition, check that | ||||||
2720 | /// there are no new attributes in this declaration. | ||||||
2721 | static void checkNewAttributesAfterDef(Sema &S, Decl *New, const Decl *Old) { | ||||||
2722 | if (!New->hasAttrs()) | ||||||
2723 | return; | ||||||
2724 | |||||||
2725 | const NamedDecl *Def = getDefinition(Old); | ||||||
2726 | if (!Def || Def == New) | ||||||
2727 | return; | ||||||
2728 | |||||||
2729 | AttrVec &NewAttributes = New->getAttrs(); | ||||||
2730 | for (unsigned I = 0, E = NewAttributes.size(); I != E;) { | ||||||
2731 | const Attr *NewAttribute = NewAttributes[I]; | ||||||
2732 | |||||||
2733 | if (isa<AliasAttr>(NewAttribute) || isa<IFuncAttr>(NewAttribute)) { | ||||||
2734 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(New)) { | ||||||
2735 | Sema::SkipBodyInfo SkipBody; | ||||||
2736 | S.CheckForFunctionRedefinition(FD, cast<FunctionDecl>(Def), &SkipBody); | ||||||
2737 | |||||||
2738 | // If we're skipping this definition, drop the "alias" attribute. | ||||||
2739 | if (SkipBody.ShouldSkip) { | ||||||
2740 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2741 | --E; | ||||||
2742 | continue; | ||||||
2743 | } | ||||||
2744 | } else { | ||||||
2745 | VarDecl *VD = cast<VarDecl>(New); | ||||||
2746 | unsigned Diag = cast<VarDecl>(Def)->isThisDeclarationADefinition() == | ||||||
2747 | VarDecl::TentativeDefinition | ||||||
2748 | ? diag::err_alias_after_tentative | ||||||
2749 | : diag::err_redefinition; | ||||||
2750 | S.Diag(VD->getLocation(), Diag) << VD->getDeclName(); | ||||||
2751 | if (Diag == diag::err_redefinition) | ||||||
2752 | S.notePreviousDefinition(Def, VD->getLocation()); | ||||||
2753 | else | ||||||
2754 | S.Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
2755 | VD->setInvalidDecl(); | ||||||
2756 | } | ||||||
2757 | ++I; | ||||||
2758 | continue; | ||||||
2759 | } | ||||||
2760 | |||||||
2761 | if (const VarDecl *VD = dyn_cast<VarDecl>(Def)) { | ||||||
2762 | // Tentative definitions are only interesting for the alias check above. | ||||||
2763 | if (VD->isThisDeclarationADefinition() != VarDecl::Definition) { | ||||||
2764 | ++I; | ||||||
2765 | continue; | ||||||
2766 | } | ||||||
2767 | } | ||||||
2768 | |||||||
2769 | if (hasAttribute(Def, NewAttribute->getKind())) { | ||||||
2770 | ++I; | ||||||
2771 | continue; // regular attr merging will take care of validating this. | ||||||
2772 | } | ||||||
2773 | |||||||
2774 | if (isa<C11NoReturnAttr>(NewAttribute)) { | ||||||
2775 | // C's _Noreturn is allowed to be added to a function after it is defined. | ||||||
2776 | ++I; | ||||||
2777 | continue; | ||||||
2778 | } else if (isa<UuidAttr>(NewAttribute)) { | ||||||
2779 | // msvc will allow a subsequent definition to add an uuid to a class | ||||||
2780 | ++I; | ||||||
2781 | continue; | ||||||
2782 | } else if (const AlignedAttr *AA = dyn_cast<AlignedAttr>(NewAttribute)) { | ||||||
2783 | if (AA->isAlignas()) { | ||||||
2784 | // C++11 [dcl.align]p6: | ||||||
2785 | // if any declaration of an entity has an alignment-specifier, | ||||||
2786 | // every defining declaration of that entity shall specify an | ||||||
2787 | // equivalent alignment. | ||||||
2788 | // C11 6.7.5/7: | ||||||
2789 | // If the definition of an object does not have an alignment | ||||||
2790 | // specifier, any other declaration of that object shall also | ||||||
2791 | // have no alignment specifier. | ||||||
2792 | S.Diag(Def->getLocation(), diag::err_alignas_missing_on_definition) | ||||||
2793 | << AA; | ||||||
2794 | S.Diag(NewAttribute->getLocation(), diag::note_alignas_on_declaration) | ||||||
2795 | << AA; | ||||||
2796 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2797 | --E; | ||||||
2798 | continue; | ||||||
2799 | } | ||||||
2800 | } else if (isa<LoaderUninitializedAttr>(NewAttribute)) { | ||||||
2801 | // If there is a C definition followed by a redeclaration with this | ||||||
2802 | // attribute then there are two different definitions. In C++, prefer the | ||||||
2803 | // standard diagnostics. | ||||||
2804 | if (!S.getLangOpts().CPlusPlus) { | ||||||
2805 | S.Diag(NewAttribute->getLocation(), | ||||||
2806 | diag::err_loader_uninitialized_redeclaration); | ||||||
2807 | S.Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
2808 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2809 | --E; | ||||||
2810 | continue; | ||||||
2811 | } | ||||||
2812 | } else if (isa<SelectAnyAttr>(NewAttribute) && | ||||||
2813 | cast<VarDecl>(New)->isInline() && | ||||||
2814 | !cast<VarDecl>(New)->isInlineSpecified()) { | ||||||
2815 | // Don't warn about applying selectany to implicitly inline variables. | ||||||
2816 | // Older compilers and language modes would require the use of selectany | ||||||
2817 | // to make such variables inline, and it would have no effect if we | ||||||
2818 | // honored it. | ||||||
2819 | ++I; | ||||||
2820 | continue; | ||||||
2821 | } else if (isa<OMPDeclareVariantAttr>(NewAttribute)) { | ||||||
2822 | // We allow to add OMP[Begin]DeclareVariantAttr to be added to | ||||||
2823 | // declarations after defintions. | ||||||
2824 | ++I; | ||||||
2825 | continue; | ||||||
2826 | } | ||||||
2827 | |||||||
2828 | S.Diag(NewAttribute->getLocation(), | ||||||
2829 | diag::warn_attribute_precede_definition); | ||||||
2830 | S.Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
2831 | NewAttributes.erase(NewAttributes.begin() + I); | ||||||
2832 | --E; | ||||||
2833 | } | ||||||
2834 | } | ||||||
2835 | |||||||
2836 | static void diagnoseMissingConstinit(Sema &S, const VarDecl *InitDecl, | ||||||
2837 | const ConstInitAttr *CIAttr, | ||||||
2838 | bool AttrBeforeInit) { | ||||||
2839 | SourceLocation InsertLoc = InitDecl->getInnerLocStart(); | ||||||
2840 | |||||||
2841 | // Figure out a good way to write this specifier on the old declaration. | ||||||
2842 | // FIXME: We should just use the spelling of CIAttr, but we don't preserve | ||||||
2843 | // enough of the attribute list spelling information to extract that without | ||||||
2844 | // heroics. | ||||||
2845 | std::string SuitableSpelling; | ||||||
2846 | if (S.getLangOpts().CPlusPlus20) | ||||||
2847 | SuitableSpelling = std::string( | ||||||
2848 | S.PP.getLastMacroWithSpelling(InsertLoc, {tok::kw_constinit})); | ||||||
2849 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus11) | ||||||
2850 | SuitableSpelling = std::string(S.PP.getLastMacroWithSpelling( | ||||||
2851 | InsertLoc, {tok::l_square, tok::l_square, | ||||||
2852 | S.PP.getIdentifierInfo("clang"), tok::coloncolon, | ||||||
2853 | S.PP.getIdentifierInfo("require_constant_initialization"), | ||||||
2854 | tok::r_square, tok::r_square})); | ||||||
2855 | if (SuitableSpelling.empty()) | ||||||
2856 | SuitableSpelling = std::string(S.PP.getLastMacroWithSpelling( | ||||||
2857 | InsertLoc, {tok::kw___attribute, tok::l_paren, tok::r_paren, | ||||||
2858 | S.PP.getIdentifierInfo("require_constant_initialization"), | ||||||
2859 | tok::r_paren, tok::r_paren})); | ||||||
2860 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus20) | ||||||
2861 | SuitableSpelling = "constinit"; | ||||||
2862 | if (SuitableSpelling.empty() && S.getLangOpts().CPlusPlus11) | ||||||
2863 | SuitableSpelling = "[[clang::require_constant_initialization]]"; | ||||||
2864 | if (SuitableSpelling.empty()) | ||||||
2865 | SuitableSpelling = "__attribute__((require_constant_initialization))"; | ||||||
2866 | SuitableSpelling += " "; | ||||||
2867 | |||||||
2868 | if (AttrBeforeInit) { | ||||||
2869 | // extern constinit int a; | ||||||
2870 | // int a = 0; // error (missing 'constinit'), accepted as extension | ||||||
2871 | assert(CIAttr->isConstinit() && "should not diagnose this for attribute")(static_cast <bool> (CIAttr->isConstinit() && "should not diagnose this for attribute") ? void (0) : __assert_fail ("CIAttr->isConstinit() && \"should not diagnose this for attribute\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 2871, __extension__ __PRETTY_FUNCTION__)); | ||||||
2872 | S.Diag(InitDecl->getLocation(), diag::ext_constinit_missing) | ||||||
2873 | << InitDecl << FixItHint::CreateInsertion(InsertLoc, SuitableSpelling); | ||||||
2874 | S.Diag(CIAttr->getLocation(), diag::note_constinit_specified_here); | ||||||
2875 | } else { | ||||||
2876 | // int a = 0; | ||||||
2877 | // constinit extern int a; // error (missing 'constinit') | ||||||
2878 | S.Diag(CIAttr->getLocation(), | ||||||
2879 | CIAttr->isConstinit() ? diag::err_constinit_added_too_late | ||||||
2880 | : diag::warn_require_const_init_added_too_late) | ||||||
2881 | << FixItHint::CreateRemoval(SourceRange(CIAttr->getLocation())); | ||||||
2882 | S.Diag(InitDecl->getLocation(), diag::note_constinit_missing_here) | ||||||
2883 | << CIAttr->isConstinit() | ||||||
2884 | << FixItHint::CreateInsertion(InsertLoc, SuitableSpelling); | ||||||
2885 | } | ||||||
2886 | } | ||||||
2887 | |||||||
2888 | /// mergeDeclAttributes - Copy attributes from the Old decl to the New one. | ||||||
2889 | void Sema::mergeDeclAttributes(NamedDecl *New, Decl *Old, | ||||||
2890 | AvailabilityMergeKind AMK) { | ||||||
2891 | if (UsedAttr *OldAttr = Old->getMostRecentDecl()->getAttr<UsedAttr>()) { | ||||||
2892 | UsedAttr *NewAttr = OldAttr->clone(Context); | ||||||
2893 | NewAttr->setInherited(true); | ||||||
2894 | New->addAttr(NewAttr); | ||||||
2895 | } | ||||||
2896 | if (RetainAttr *OldAttr = Old->getMostRecentDecl()->getAttr<RetainAttr>()) { | ||||||
2897 | RetainAttr *NewAttr = OldAttr->clone(Context); | ||||||
2898 | NewAttr->setInherited(true); | ||||||
2899 | New->addAttr(NewAttr); | ||||||
2900 | } | ||||||
2901 | |||||||
2902 | if (!Old->hasAttrs() && !New->hasAttrs()) | ||||||
2903 | return; | ||||||
2904 | |||||||
2905 | // [dcl.constinit]p1: | ||||||
2906 | // If the [constinit] specifier is applied to any declaration of a | ||||||
2907 | // variable, it shall be applied to the initializing declaration. | ||||||
2908 | const auto *OldConstInit = Old->getAttr<ConstInitAttr>(); | ||||||
2909 | const auto *NewConstInit = New->getAttr<ConstInitAttr>(); | ||||||
2910 | if (bool(OldConstInit) != bool(NewConstInit)) { | ||||||
2911 | const auto *OldVD = cast<VarDecl>(Old); | ||||||
2912 | auto *NewVD = cast<VarDecl>(New); | ||||||
2913 | |||||||
2914 | // Find the initializing declaration. Note that we might not have linked | ||||||
2915 | // the new declaration into the redeclaration chain yet. | ||||||
2916 | const VarDecl *InitDecl = OldVD->getInitializingDeclaration(); | ||||||
2917 | if (!InitDecl && | ||||||
2918 | (NewVD->hasInit() || NewVD->isThisDeclarationADefinition())) | ||||||
2919 | InitDecl = NewVD; | ||||||
2920 | |||||||
2921 | if (InitDecl == NewVD) { | ||||||
2922 | // This is the initializing declaration. If it would inherit 'constinit', | ||||||
2923 | // that's ill-formed. (Note that we do not apply this to the attribute | ||||||
2924 | // form). | ||||||
2925 | if (OldConstInit && OldConstInit->isConstinit()) | ||||||
2926 | diagnoseMissingConstinit(*this, NewVD, OldConstInit, | ||||||
2927 | /*AttrBeforeInit=*/true); | ||||||
2928 | } else if (NewConstInit) { | ||||||
2929 | // This is the first time we've been told that this declaration should | ||||||
2930 | // have a constant initializer. If we already saw the initializing | ||||||
2931 | // declaration, this is too late. | ||||||
2932 | if (InitDecl && InitDecl != NewVD) { | ||||||
2933 | diagnoseMissingConstinit(*this, InitDecl, NewConstInit, | ||||||
2934 | /*AttrBeforeInit=*/false); | ||||||
2935 | NewVD->dropAttr<ConstInitAttr>(); | ||||||
2936 | } | ||||||
2937 | } | ||||||
2938 | } | ||||||
2939 | |||||||
2940 | // Attributes declared post-definition are currently ignored. | ||||||
2941 | checkNewAttributesAfterDef(*this, New, Old); | ||||||
2942 | |||||||
2943 | if (AsmLabelAttr *NewA = New->getAttr<AsmLabelAttr>()) { | ||||||
2944 | if (AsmLabelAttr *OldA = Old->getAttr<AsmLabelAttr>()) { | ||||||
2945 | if (!OldA->isEquivalent(NewA)) { | ||||||
2946 | // This redeclaration changes __asm__ label. | ||||||
2947 | Diag(New->getLocation(), diag::err_different_asm_label); | ||||||
2948 | Diag(OldA->getLocation(), diag::note_previous_declaration); | ||||||
2949 | } | ||||||
2950 | } else if (Old->isUsed()) { | ||||||
2951 | // This redeclaration adds an __asm__ label to a declaration that has | ||||||
2952 | // already been ODR-used. | ||||||
2953 | Diag(New->getLocation(), diag::err_late_asm_label_name) | ||||||
2954 | << isa<FunctionDecl>(Old) << New->getAttr<AsmLabelAttr>()->getRange(); | ||||||
2955 | } | ||||||
2956 | } | ||||||
2957 | |||||||
2958 | // Re-declaration cannot add abi_tag's. | ||||||
2959 | if (const auto *NewAbiTagAttr = New->getAttr<AbiTagAttr>()) { | ||||||
2960 | if (const auto *OldAbiTagAttr = Old->getAttr<AbiTagAttr>()) { | ||||||
2961 | for (const auto &NewTag : NewAbiTagAttr->tags()) { | ||||||
2962 | if (std::find(OldAbiTagAttr->tags_begin(), OldAbiTagAttr->tags_end(), | ||||||
2963 | NewTag) == OldAbiTagAttr->tags_end()) { | ||||||
2964 | Diag(NewAbiTagAttr->getLocation(), | ||||||
2965 | diag::err_new_abi_tag_on_redeclaration) | ||||||
2966 | << NewTag; | ||||||
2967 | Diag(OldAbiTagAttr->getLocation(), diag::note_previous_declaration); | ||||||
2968 | } | ||||||
2969 | } | ||||||
2970 | } else { | ||||||
2971 | Diag(NewAbiTagAttr->getLocation(), diag::err_abi_tag_on_redeclaration); | ||||||
2972 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
2973 | } | ||||||
2974 | } | ||||||
2975 | |||||||
2976 | // This redeclaration adds a section attribute. | ||||||
2977 | if (New->hasAttr<SectionAttr>() && !Old->hasAttr<SectionAttr>()) { | ||||||
2978 | if (auto *VD = dyn_cast<VarDecl>(New)) { | ||||||
2979 | if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) { | ||||||
2980 | Diag(New->getLocation(), diag::warn_attribute_section_on_redeclaration); | ||||||
2981 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
2982 | } | ||||||
2983 | } | ||||||
2984 | } | ||||||
2985 | |||||||
2986 | // Redeclaration adds code-seg attribute. | ||||||
2987 | const auto *NewCSA = New->getAttr<CodeSegAttr>(); | ||||||
2988 | if (NewCSA && !Old->hasAttr<CodeSegAttr>() && | ||||||
2989 | !NewCSA->isImplicit() && isa<CXXMethodDecl>(New)) { | ||||||
2990 | Diag(New->getLocation(), diag::warn_mismatched_section) | ||||||
2991 | << 0 /*codeseg*/; | ||||||
2992 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
2993 | } | ||||||
2994 | |||||||
2995 | if (!Old->hasAttrs()) | ||||||
2996 | return; | ||||||
2997 | |||||||
2998 | bool foundAny = New->hasAttrs(); | ||||||
2999 | |||||||
3000 | // Ensure that any moving of objects within the allocated map is done before | ||||||
3001 | // we process them. | ||||||
3002 | if (!foundAny) New->setAttrs(AttrVec()); | ||||||
3003 | |||||||
3004 | for (auto *I : Old->specific_attrs<InheritableAttr>()) { | ||||||
3005 | // Ignore deprecated/unavailable/availability attributes if requested. | ||||||
3006 | AvailabilityMergeKind LocalAMK = AMK_None; | ||||||
3007 | if (isa<DeprecatedAttr>(I) || | ||||||
3008 | isa<UnavailableAttr>(I) || | ||||||
3009 | isa<AvailabilityAttr>(I)) { | ||||||
3010 | switch (AMK) { | ||||||
3011 | case AMK_None: | ||||||
3012 | continue; | ||||||
3013 | |||||||
3014 | case AMK_Redeclaration: | ||||||
3015 | case AMK_Override: | ||||||
3016 | case AMK_ProtocolImplementation: | ||||||
3017 | case AMK_OptionalProtocolImplementation: | ||||||
3018 | LocalAMK = AMK; | ||||||
3019 | break; | ||||||
3020 | } | ||||||
3021 | } | ||||||
3022 | |||||||
3023 | // Already handled. | ||||||
3024 | if (isa<UsedAttr>(I) || isa<RetainAttr>(I)) | ||||||
3025 | continue; | ||||||
3026 | |||||||
3027 | if (mergeDeclAttribute(*this, New, I, LocalAMK)) | ||||||
3028 | foundAny = true; | ||||||
3029 | } | ||||||
3030 | |||||||
3031 | if (mergeAlignedAttrs(*this, New, Old)) | ||||||
3032 | foundAny = true; | ||||||
3033 | |||||||
3034 | if (!foundAny) New->dropAttrs(); | ||||||
3035 | } | ||||||
3036 | |||||||
3037 | /// mergeParamDeclAttributes - Copy attributes from the old parameter | ||||||
3038 | /// to the new one. | ||||||
3039 | static void mergeParamDeclAttributes(ParmVarDecl *newDecl, | ||||||
3040 | const ParmVarDecl *oldDecl, | ||||||
3041 | Sema &S) { | ||||||
3042 | // C++11 [dcl.attr.depend]p2: | ||||||
3043 | // The first declaration of a function shall specify the | ||||||
3044 | // carries_dependency attribute for its declarator-id if any declaration | ||||||
3045 | // of the function specifies the carries_dependency attribute. | ||||||
3046 | const CarriesDependencyAttr *CDA = newDecl->getAttr<CarriesDependencyAttr>(); | ||||||
3047 | if (CDA && !oldDecl->hasAttr<CarriesDependencyAttr>()) { | ||||||
3048 | S.Diag(CDA->getLocation(), | ||||||
3049 | diag::err_carries_dependency_missing_on_first_decl) << 1/*Param*/; | ||||||
3050 | // Find the first declaration of the parameter. | ||||||
3051 | // FIXME: Should we build redeclaration chains for function parameters? | ||||||
3052 | const FunctionDecl *FirstFD = | ||||||
3053 | cast<FunctionDecl>(oldDecl->getDeclContext())->getFirstDecl(); | ||||||
3054 | const ParmVarDecl *FirstVD = | ||||||
3055 | FirstFD->getParamDecl(oldDecl->getFunctionScopeIndex()); | ||||||
3056 | S.Diag(FirstVD->getLocation(), | ||||||
3057 | diag::note_carries_dependency_missing_first_decl) << 1/*Param*/; | ||||||
3058 | } | ||||||
3059 | |||||||
3060 | if (!oldDecl->hasAttrs()) | ||||||
3061 | return; | ||||||
3062 | |||||||
3063 | bool foundAny = newDecl->hasAttrs(); | ||||||
3064 | |||||||
3065 | // Ensure that any moving of objects within the allocated map is | ||||||
3066 | // done before we process them. | ||||||
3067 | if (!foundAny) newDecl->setAttrs(AttrVec()); | ||||||
3068 | |||||||
3069 | for (const auto *I : oldDecl->specific_attrs<InheritableParamAttr>()) { | ||||||
3070 | if (!DeclHasAttr(newDecl, I)) { | ||||||
3071 | InheritableAttr *newAttr = | ||||||
3072 | cast<InheritableParamAttr>(I->clone(S.Context)); | ||||||
3073 | newAttr->setInherited(true); | ||||||
3074 | newDecl->addAttr(newAttr); | ||||||
3075 | foundAny = true; | ||||||
3076 | } | ||||||
3077 | } | ||||||
3078 | |||||||
3079 | if (!foundAny) newDecl->dropAttrs(); | ||||||
3080 | } | ||||||
3081 | |||||||
3082 | static void mergeParamDeclTypes(ParmVarDecl *NewParam, | ||||||
3083 | const ParmVarDecl *OldParam, | ||||||
3084 | Sema &S) { | ||||||
3085 | if (auto Oldnullability = OldParam->getType()->getNullability(S.Context)) { | ||||||
3086 | if (auto Newnullability = NewParam->getType()->getNullability(S.Context)) { | ||||||
3087 | if (*Oldnullability != *Newnullability) { | ||||||
3088 | S.Diag(NewParam->getLocation(), diag::warn_mismatched_nullability_attr) | ||||||
3089 | << DiagNullabilityKind( | ||||||
3090 | *Newnullability, | ||||||
3091 | ((NewParam->getObjCDeclQualifier() & Decl::OBJC_TQ_CSNullability) | ||||||
3092 | != 0)) | ||||||
3093 | << DiagNullabilityKind( | ||||||
3094 | *Oldnullability, | ||||||
3095 | ((OldParam->getObjCDeclQualifier() & Decl::OBJC_TQ_CSNullability) | ||||||
3096 | != 0)); | ||||||
3097 | S.Diag(OldParam->getLocation(), diag::note_previous_declaration); | ||||||
3098 | } | ||||||
3099 | } else { | ||||||
3100 | QualType NewT = NewParam->getType(); | ||||||
3101 | NewT = S.Context.getAttributedType( | ||||||
3102 | AttributedType::getNullabilityAttrKind(*Oldnullability), | ||||||
3103 | NewT, NewT); | ||||||
3104 | NewParam->setType(NewT); | ||||||
3105 | } | ||||||
3106 | } | ||||||
3107 | } | ||||||
3108 | |||||||
3109 | namespace { | ||||||
3110 | |||||||
3111 | /// Used in MergeFunctionDecl to keep track of function parameters in | ||||||
3112 | /// C. | ||||||
3113 | struct GNUCompatibleParamWarning { | ||||||
3114 | ParmVarDecl *OldParm; | ||||||
3115 | ParmVarDecl *NewParm; | ||||||
3116 | QualType PromotedType; | ||||||
3117 | }; | ||||||
3118 | |||||||
3119 | } // end anonymous namespace | ||||||
3120 | |||||||
3121 | // Determine whether the previous declaration was a definition, implicit | ||||||
3122 | // declaration, or a declaration. | ||||||
3123 | template <typename T> | ||||||
3124 | static std::pair<diag::kind, SourceLocation> | ||||||
3125 | getNoteDiagForInvalidRedeclaration(const T *Old, const T *New) { | ||||||
3126 | diag::kind PrevDiag; | ||||||
3127 | SourceLocation OldLocation = Old->getLocation(); | ||||||
3128 | if (Old->isThisDeclarationADefinition()) | ||||||
3129 | PrevDiag = diag::note_previous_definition; | ||||||
3130 | else if (Old->isImplicit()) { | ||||||
3131 | PrevDiag = diag::note_previous_implicit_declaration; | ||||||
3132 | if (OldLocation.isInvalid()) | ||||||
3133 | OldLocation = New->getLocation(); | ||||||
3134 | } else | ||||||
3135 | PrevDiag = diag::note_previous_declaration; | ||||||
3136 | return std::make_pair(PrevDiag, OldLocation); | ||||||
3137 | } | ||||||
3138 | |||||||
3139 | /// canRedefineFunction - checks if a function can be redefined. Currently, | ||||||
3140 | /// only extern inline functions can be redefined, and even then only in | ||||||
3141 | /// GNU89 mode. | ||||||
3142 | static bool canRedefineFunction(const FunctionDecl *FD, | ||||||
3143 | const LangOptions& LangOpts) { | ||||||
3144 | return ((FD->hasAttr<GNUInlineAttr>() || LangOpts.GNUInline) && | ||||||
3145 | !LangOpts.CPlusPlus && | ||||||
3146 | FD->isInlineSpecified() && | ||||||
3147 | FD->getStorageClass() == SC_Extern); | ||||||
3148 | } | ||||||
3149 | |||||||
3150 | const AttributedType *Sema::getCallingConvAttributedType(QualType T) const { | ||||||
3151 | const AttributedType *AT = T->getAs<AttributedType>(); | ||||||
3152 | while (AT && !AT->isCallingConv()) | ||||||
3153 | AT = AT->getModifiedType()->getAs<AttributedType>(); | ||||||
3154 | return AT; | ||||||
3155 | } | ||||||
3156 | |||||||
3157 | template <typename T> | ||||||
3158 | static bool haveIncompatibleLanguageLinkages(const T *Old, const T *New) { | ||||||
3159 | const DeclContext *DC = Old->getDeclContext(); | ||||||
3160 | if (DC->isRecord()) | ||||||
3161 | return false; | ||||||
3162 | |||||||
3163 | LanguageLinkage OldLinkage = Old->getLanguageLinkage(); | ||||||
3164 | if (OldLinkage == CXXLanguageLinkage && New->isInExternCContext()) | ||||||
3165 | return true; | ||||||
3166 | if (OldLinkage == CLanguageLinkage && New->isInExternCXXContext()) | ||||||
3167 | return true; | ||||||
3168 | return false; | ||||||
3169 | } | ||||||
3170 | |||||||
3171 | template<typename T> static bool isExternC(T *D) { return D->isExternC(); } | ||||||
3172 | static bool isExternC(VarTemplateDecl *) { return false; } | ||||||
3173 | static bool isExternC(FunctionTemplateDecl *) { return false; } | ||||||
3174 | |||||||
3175 | /// Check whether a redeclaration of an entity introduced by a | ||||||
3176 | /// using-declaration is valid, given that we know it's not an overload | ||||||
3177 | /// (nor a hidden tag declaration). | ||||||
3178 | template<typename ExpectedDecl> | ||||||
3179 | static bool checkUsingShadowRedecl(Sema &S, UsingShadowDecl *OldS, | ||||||
3180 | ExpectedDecl *New) { | ||||||
3181 | // C++11 [basic.scope.declarative]p4: | ||||||
3182 | // Given a set of declarations in a single declarative region, each of | ||||||
3183 | // which specifies the same unqualified name, | ||||||
3184 | // -- they shall all refer to the same entity, or all refer to functions | ||||||
3185 | // and function templates; or | ||||||
3186 | // -- exactly one declaration shall declare a class name or enumeration | ||||||
3187 | // name that is not a typedef name and the other declarations shall all | ||||||
3188 | // refer to the same variable or enumerator, or all refer to functions | ||||||
3189 | // and function templates; in this case the class name or enumeration | ||||||
3190 | // name is hidden (3.3.10). | ||||||
3191 | |||||||
3192 | // C++11 [namespace.udecl]p14: | ||||||
3193 | // If a function declaration in namespace scope or block scope has the | ||||||
3194 | // same name and the same parameter-type-list as a function introduced | ||||||
3195 | // by a using-declaration, and the declarations do not declare the same | ||||||
3196 | // function, the program is ill-formed. | ||||||
3197 | |||||||
3198 | auto *Old = dyn_cast<ExpectedDecl>(OldS->getTargetDecl()); | ||||||
3199 | if (Old && | ||||||
3200 | !Old->getDeclContext()->getRedeclContext()->Equals( | ||||||
3201 | New->getDeclContext()->getRedeclContext()) && | ||||||
3202 | !(isExternC(Old) && isExternC(New))) | ||||||
3203 | Old = nullptr; | ||||||
3204 | |||||||
3205 | if (!Old) { | ||||||
3206 | S.Diag(New->getLocation(), diag::err_using_decl_conflict_reverse); | ||||||
3207 | S.Diag(OldS->getTargetDecl()->getLocation(), diag::note_using_decl_target); | ||||||
3208 | S.Diag(OldS->getIntroducer()->getLocation(), diag::note_using_decl) << 0; | ||||||
3209 | return true; | ||||||
3210 | } | ||||||
3211 | return false; | ||||||
3212 | } | ||||||
3213 | |||||||
3214 | static bool hasIdenticalPassObjectSizeAttrs(const FunctionDecl *A, | ||||||
3215 | const FunctionDecl *B) { | ||||||
3216 | assert(A->getNumParams() == B->getNumParams())(static_cast <bool> (A->getNumParams() == B->getNumParams ()) ? void (0) : __assert_fail ("A->getNumParams() == B->getNumParams()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 3216, __extension__ __PRETTY_FUNCTION__)); | ||||||
3217 | |||||||
3218 | auto AttrEq = [](const ParmVarDecl *A, const ParmVarDecl *B) { | ||||||
3219 | const auto *AttrA = A->getAttr<PassObjectSizeAttr>(); | ||||||
3220 | const auto *AttrB = B->getAttr<PassObjectSizeAttr>(); | ||||||
3221 | if (AttrA == AttrB) | ||||||
3222 | return true; | ||||||
3223 | return AttrA && AttrB && AttrA->getType() == AttrB->getType() && | ||||||
3224 | AttrA->isDynamic() == AttrB->isDynamic(); | ||||||
3225 | }; | ||||||
3226 | |||||||
3227 | return std::equal(A->param_begin(), A->param_end(), B->param_begin(), AttrEq); | ||||||
3228 | } | ||||||
3229 | |||||||
3230 | /// If necessary, adjust the semantic declaration context for a qualified | ||||||
3231 | /// declaration to name the correct inline namespace within the qualifier. | ||||||
3232 | static void adjustDeclContextForDeclaratorDecl(DeclaratorDecl *NewD, | ||||||
3233 | DeclaratorDecl *OldD) { | ||||||
3234 | // The only case where we need to update the DeclContext is when | ||||||
3235 | // redeclaration lookup for a qualified name finds a declaration | ||||||
3236 | // in an inline namespace within the context named by the qualifier: | ||||||
3237 | // | ||||||
3238 | // inline namespace N { int f(); } | ||||||
3239 | // int ::f(); // Sema DC needs adjusting from :: to N::. | ||||||
3240 | // | ||||||
3241 | // For unqualified declarations, the semantic context *can* change | ||||||
3242 | // along the redeclaration chain (for local extern declarations, | ||||||
3243 | // extern "C" declarations, and friend declarations in particular). | ||||||
3244 | if (!NewD->getQualifier()) | ||||||
3245 | return; | ||||||
3246 | |||||||
3247 | // NewD is probably already in the right context. | ||||||
3248 | auto *NamedDC = NewD->getDeclContext()->getRedeclContext(); | ||||||
3249 | auto *SemaDC = OldD->getDeclContext()->getRedeclContext(); | ||||||
3250 | if (NamedDC->Equals(SemaDC)) | ||||||
3251 | return; | ||||||
3252 | |||||||
3253 | assert((NamedDC->InEnclosingNamespaceSetOf(SemaDC) ||(static_cast <bool> ((NamedDC->InEnclosingNamespaceSetOf (SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl ()) && "unexpected context for redeclaration") ? void (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 3255, __extension__ __PRETTY_FUNCTION__)) | ||||||
3254 | NewD->isInvalidDecl() || OldD->isInvalidDecl()) &&(static_cast <bool> ((NamedDC->InEnclosingNamespaceSetOf (SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl ()) && "unexpected context for redeclaration") ? void (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 3255, __extension__ __PRETTY_FUNCTION__)) | ||||||
3255 | "unexpected context for redeclaration")(static_cast <bool> ((NamedDC->InEnclosingNamespaceSetOf (SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl ()) && "unexpected context for redeclaration") ? void (0) : __assert_fail ("(NamedDC->InEnclosingNamespaceSetOf(SemaDC) || NewD->isInvalidDecl() || OldD->isInvalidDecl()) && \"unexpected context for redeclaration\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 3255, __extension__ __PRETTY_FUNCTION__)); | ||||||
3256 | |||||||
3257 | auto *LexDC = NewD->getLexicalDeclContext(); | ||||||
3258 | auto FixSemaDC = [=](NamedDecl *D) { | ||||||
3259 | if (!D) | ||||||
3260 | return; | ||||||
3261 | D->setDeclContext(SemaDC); | ||||||
3262 | D->setLexicalDeclContext(LexDC); | ||||||
3263 | }; | ||||||
3264 | |||||||
3265 | FixSemaDC(NewD); | ||||||
3266 | if (auto *FD = dyn_cast<FunctionDecl>(NewD)) | ||||||
3267 | FixSemaDC(FD->getDescribedFunctionTemplate()); | ||||||
3268 | else if (auto *VD = dyn_cast<VarDecl>(NewD)) | ||||||
3269 | FixSemaDC(VD->getDescribedVarTemplate()); | ||||||
3270 | } | ||||||
3271 | |||||||
3272 | /// MergeFunctionDecl - We just parsed a function 'New' from | ||||||
3273 | /// declarator D which has the same name and scope as a previous | ||||||
3274 | /// declaration 'Old'. Figure out how to resolve this situation, | ||||||
3275 | /// merging decls or emitting diagnostics as appropriate. | ||||||
3276 | /// | ||||||
3277 | /// In C++, New and Old must be declarations that are not | ||||||
3278 | /// overloaded. Use IsOverload to determine whether New and Old are | ||||||
3279 | /// overloaded, and to select the Old declaration that New should be | ||||||
3280 | /// merged with. | ||||||
3281 | /// | ||||||
3282 | /// Returns true if there was an error, false otherwise. | ||||||
3283 | bool Sema::MergeFunctionDecl(FunctionDecl *New, NamedDecl *&OldD, | ||||||
3284 | Scope *S, bool MergeTypeWithOld) { | ||||||
3285 | // Verify the old decl was also a function. | ||||||
3286 | FunctionDecl *Old = OldD->getAsFunction(); | ||||||
3287 | if (!Old) { | ||||||
3288 | if (UsingShadowDecl *Shadow = dyn_cast<UsingShadowDecl>(OldD)) { | ||||||
3289 | if (New->getFriendObjectKind()) { | ||||||
3290 | Diag(New->getLocation(), diag::err_using_decl_friend); | ||||||
3291 | Diag(Shadow->getTargetDecl()->getLocation(), | ||||||
3292 | diag::note_using_decl_target); | ||||||
3293 | Diag(Shadow->getIntroducer()->getLocation(), diag::note_using_decl) | ||||||
3294 | << 0; | ||||||
3295 | return true; | ||||||
3296 | } | ||||||
3297 | |||||||
3298 | // Check whether the two declarations might declare the same function or | ||||||
3299 | // function template. | ||||||
3300 | if (FunctionTemplateDecl *NewTemplate = | ||||||
3301 | New->getDescribedFunctionTemplate()) { | ||||||
3302 | if (checkUsingShadowRedecl<FunctionTemplateDecl>(*this, Shadow, | ||||||
3303 | NewTemplate)) | ||||||
3304 | return true; | ||||||
3305 | OldD = Old = cast<FunctionTemplateDecl>(Shadow->getTargetDecl()) | ||||||
3306 | ->getAsFunction(); | ||||||
3307 | } else { | ||||||
3308 | if (checkUsingShadowRedecl<FunctionDecl>(*this, Shadow, New)) | ||||||
3309 | return true; | ||||||
3310 | OldD = Old = cast<FunctionDecl>(Shadow->getTargetDecl()); | ||||||
3311 | } | ||||||
3312 | } else { | ||||||
3313 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
3314 | << New->getDeclName(); | ||||||
3315 | notePreviousDefinition(OldD, New->getLocation()); | ||||||
3316 | return true; | ||||||
3317 | } | ||||||
3318 | } | ||||||
3319 | |||||||
3320 | // If the old declaration was found in an inline namespace and the new | ||||||
3321 | // declaration was qualified, update the DeclContext to match. | ||||||
3322 | adjustDeclContextForDeclaratorDecl(New, Old); | ||||||
3323 | |||||||
3324 | // If the old declaration is invalid, just give up here. | ||||||
3325 | if (Old->isInvalidDecl()) | ||||||
3326 | return true; | ||||||
3327 | |||||||
3328 | // Disallow redeclaration of some builtins. | ||||||
3329 | if (!getASTContext().canBuiltinBeRedeclared(Old)) { | ||||||
3330 | Diag(New->getLocation(), diag::err_builtin_redeclare) << Old->getDeclName(); | ||||||
3331 | Diag(Old->getLocation(), diag::note_previous_builtin_declaration) | ||||||
3332 | << Old << Old->getType(); | ||||||
3333 | return true; | ||||||
3334 | } | ||||||
3335 | |||||||
3336 | diag::kind PrevDiag; | ||||||
3337 | SourceLocation OldLocation; | ||||||
3338 | std::tie(PrevDiag, OldLocation) = | ||||||
3339 | getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
3340 | |||||||
3341 | // Don't complain about this if we're in GNU89 mode and the old function | ||||||
3342 | // is an extern inline function. | ||||||
3343 | // Don't complain about specializations. They are not supposed to have | ||||||
3344 | // storage classes. | ||||||
3345 | if (!isa<CXXMethodDecl>(New) && !isa<CXXMethodDecl>(Old) && | ||||||
3346 | New->getStorageClass() == SC_Static && | ||||||
3347 | Old->hasExternalFormalLinkage() && | ||||||
3348 | !New->getTemplateSpecializationInfo() && | ||||||
3349 | !canRedefineFunction(Old, getLangOpts())) { | ||||||
3350 | if (getLangOpts().MicrosoftExt) { | ||||||
3351 | Diag(New->getLocation(), diag::ext_static_non_static) << New; | ||||||
3352 | Diag(OldLocation, PrevDiag); | ||||||
3353 | } else { | ||||||
3354 | Diag(New->getLocation(), diag::err_static_non_static) << New; | ||||||
3355 | Diag(OldLocation, PrevDiag); | ||||||
3356 | return true; | ||||||
3357 | } | ||||||
3358 | } | ||||||
3359 | |||||||
3360 | if (const auto *ILA = New->getAttr<InternalLinkageAttr>()) | ||||||
3361 | if (!Old->hasAttr<InternalLinkageAttr>()) { | ||||||
3362 | Diag(New->getLocation(), diag::err_attribute_missing_on_first_decl) | ||||||
3363 | << ILA; | ||||||
3364 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
3365 | New->dropAttr<InternalLinkageAttr>(); | ||||||
3366 | } | ||||||
3367 | |||||||
3368 | if (auto *EA = New->getAttr<ErrorAttr>()) { | ||||||
3369 | if (!Old->hasAttr<ErrorAttr>()) { | ||||||
3370 | Diag(EA->getLocation(), diag::err_attribute_missing_on_first_decl) << EA; | ||||||
3371 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
3372 | New->dropAttr<ErrorAttr>(); | ||||||
3373 | } | ||||||
3374 | } | ||||||
3375 | |||||||
3376 | if (CheckRedeclarationModuleOwnership(New, Old)) | ||||||
3377 | return true; | ||||||
3378 | |||||||
3379 | if (!getLangOpts().CPlusPlus) { | ||||||
3380 | bool OldOvl = Old->hasAttr<OverloadableAttr>(); | ||||||
3381 | if (OldOvl != New->hasAttr<OverloadableAttr>() && !Old->isImplicit()) { | ||||||
3382 | Diag(New->getLocation(), diag::err_attribute_overloadable_mismatch) | ||||||
3383 | << New << OldOvl; | ||||||
3384 | |||||||
3385 | // Try our best to find a decl that actually has the overloadable | ||||||
3386 | // attribute for the note. In most cases (e.g. programs with only one | ||||||
3387 | // broken declaration/definition), this won't matter. | ||||||
3388 | // | ||||||
3389 | // FIXME: We could do this if we juggled some extra state in | ||||||
3390 | // OverloadableAttr, rather than just removing it. | ||||||
3391 | const Decl *DiagOld = Old; | ||||||
3392 | if (OldOvl) { | ||||||
3393 | auto OldIter = llvm::find_if(Old->redecls(), [](const Decl *D) { | ||||||
3394 | const auto *A = D->getAttr<OverloadableAttr>(); | ||||||
3395 | return A && !A->isImplicit(); | ||||||
3396 | }); | ||||||
3397 | // If we've implicitly added *all* of the overloadable attrs to this | ||||||
3398 | // chain, emitting a "previous redecl" note is pointless. | ||||||
3399 | DiagOld = OldIter == Old->redecls_end() ? nullptr : *OldIter; | ||||||
3400 | } | ||||||
3401 | |||||||
3402 | if (DiagOld) | ||||||
3403 | Diag(DiagOld->getLocation(), | ||||||
3404 | diag::note_attribute_overloadable_prev_overload) | ||||||
3405 | << OldOvl; | ||||||
3406 | |||||||
3407 | if (OldOvl) | ||||||
3408 | New->addAttr(OverloadableAttr::CreateImplicit(Context)); | ||||||
3409 | else | ||||||
3410 | New->dropAttr<OverloadableAttr>(); | ||||||
3411 | } | ||||||
3412 | } | ||||||
3413 | |||||||
3414 | // If a function is first declared with a calling convention, but is later | ||||||
3415 | // declared or defined without one, all following decls assume the calling | ||||||
3416 | // convention of the first. | ||||||
3417 | // | ||||||
3418 | // It's OK if a function is first declared without a calling convention, | ||||||
3419 | // but is later declared or defined with the default calling convention. | ||||||
3420 | // | ||||||
3421 | // To test if either decl has an explicit calling convention, we look for | ||||||
3422 | // AttributedType sugar nodes on the type as written. If they are missing or | ||||||
3423 | // were canonicalized away, we assume the calling convention was implicit. | ||||||
3424 | // | ||||||
3425 | // Note also that we DO NOT return at this point, because we still have | ||||||
3426 | // other tests to run. | ||||||
3427 | QualType OldQType = Context.getCanonicalType(Old->getType()); | ||||||
3428 | QualType NewQType = Context.getCanonicalType(New->getType()); | ||||||
3429 | const FunctionType *OldType = cast<FunctionType>(OldQType); | ||||||
3430 | const FunctionType *NewType = cast<FunctionType>(NewQType); | ||||||
3431 | FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo(); | ||||||
3432 | FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo(); | ||||||
3433 | bool RequiresAdjustment = false; | ||||||
3434 | |||||||
3435 | if (OldTypeInfo.getCC() != NewTypeInfo.getCC()) { | ||||||
3436 | FunctionDecl *First = Old->getFirstDecl(); | ||||||
3437 | const FunctionType *FT = | ||||||
3438 | First->getType().getCanonicalType()->castAs<FunctionType>(); | ||||||
3439 | FunctionType::ExtInfo FI = FT->getExtInfo(); | ||||||
3440 | bool NewCCExplicit = getCallingConvAttributedType(New->getType()); | ||||||
3441 | if (!NewCCExplicit) { | ||||||
3442 | // Inherit the CC from the previous declaration if it was specified | ||||||
3443 | // there but not here. | ||||||
3444 | NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC()); | ||||||
3445 | RequiresAdjustment = true; | ||||||
3446 | } else if (Old->getBuiltinID()) { | ||||||
3447 | // Builtin attribute isn't propagated to the new one yet at this point, | ||||||
3448 | // so we check if the old one is a builtin. | ||||||
3449 | |||||||
3450 | // Calling Conventions on a Builtin aren't really useful and setting a | ||||||
3451 | // default calling convention and cdecl'ing some builtin redeclarations is | ||||||
3452 | // common, so warn and ignore the calling convention on the redeclaration. | ||||||
3453 | Diag(New->getLocation(), diag::warn_cconv_unsupported) | ||||||
3454 | << FunctionType::getNameForCallConv(NewTypeInfo.getCC()) | ||||||
3455 | << (int)CallingConventionIgnoredReason::BuiltinFunction; | ||||||
3456 | NewTypeInfo = NewTypeInfo.withCallingConv(OldTypeInfo.getCC()); | ||||||
3457 | RequiresAdjustment = true; | ||||||
3458 | } else { | ||||||
3459 | // Calling conventions aren't compatible, so complain. | ||||||
3460 | bool FirstCCExplicit = getCallingConvAttributedType(First->getType()); | ||||||
3461 | Diag(New->getLocation(), diag::err_cconv_change) | ||||||
3462 | << FunctionType::getNameForCallConv(NewTypeInfo.getCC()) | ||||||
3463 | << !FirstCCExplicit | ||||||
3464 | << (!FirstCCExplicit ? "" : | ||||||
3465 | FunctionType::getNameForCallConv(FI.getCC())); | ||||||
3466 | |||||||
3467 | // Put the note on the first decl, since it is the one that matters. | ||||||
3468 | Diag(First->getLocation(), diag::note_previous_declaration); | ||||||
3469 | return true; | ||||||
3470 | } | ||||||
3471 | } | ||||||
3472 | |||||||
3473 | // FIXME: diagnose the other way around? | ||||||
3474 | if (OldTypeInfo.getNoReturn() && !NewTypeInfo.getNoReturn()) { | ||||||
3475 | NewTypeInfo = NewTypeInfo.withNoReturn(true); | ||||||
3476 | RequiresAdjustment = true; | ||||||
3477 | } | ||||||
3478 | |||||||
3479 | // Merge regparm attribute. | ||||||
3480 | if (OldTypeInfo.getHasRegParm() != NewTypeInfo.getHasRegParm() || | ||||||
3481 | OldTypeInfo.getRegParm() != NewTypeInfo.getRegParm()) { | ||||||
3482 | if (NewTypeInfo.getHasRegParm()) { | ||||||
3483 | Diag(New->getLocation(), diag::err_regparm_mismatch) | ||||||
3484 | << NewType->getRegParmType() | ||||||
3485 | << OldType->getRegParmType(); | ||||||
3486 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3487 | return true; | ||||||
3488 | } | ||||||
3489 | |||||||
3490 | NewTypeInfo = NewTypeInfo.withRegParm(OldTypeInfo.getRegParm()); | ||||||
3491 | RequiresAdjustment = true; | ||||||
3492 | } | ||||||
3493 | |||||||
3494 | // Merge ns_returns_retained attribute. | ||||||
3495 | if (OldTypeInfo.getProducesResult() != NewTypeInfo.getProducesResult()) { | ||||||
3496 | if (NewTypeInfo.getProducesResult()) { | ||||||
3497 | Diag(New->getLocation(), diag::err_function_attribute_mismatch) | ||||||
3498 | << "'ns_returns_retained'"; | ||||||
3499 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3500 | return true; | ||||||
3501 | } | ||||||
3502 | |||||||
3503 | NewTypeInfo = NewTypeInfo.withProducesResult(true); | ||||||
3504 | RequiresAdjustment = true; | ||||||
3505 | } | ||||||
3506 | |||||||
3507 | if (OldTypeInfo.getNoCallerSavedRegs() != | ||||||
3508 | NewTypeInfo.getNoCallerSavedRegs()) { | ||||||
3509 | if (NewTypeInfo.getNoCallerSavedRegs()) { | ||||||
3510 | AnyX86NoCallerSavedRegistersAttr *Attr = | ||||||
3511 | New->getAttr<AnyX86NoCallerSavedRegistersAttr>(); | ||||||
3512 | Diag(New->getLocation(), diag::err_function_attribute_mismatch) << Attr; | ||||||
3513 | Diag(OldLocation, diag::note_previous_declaration); | ||||||
3514 | return true; | ||||||
3515 | } | ||||||
3516 | |||||||
3517 | NewTypeInfo = NewTypeInfo.withNoCallerSavedRegs(true); | ||||||
3518 | RequiresAdjustment = true; | ||||||
3519 | } | ||||||
3520 | |||||||
3521 | if (RequiresAdjustment) { | ||||||
3522 | const FunctionType *AdjustedType = New->getType()->getAs<FunctionType>(); | ||||||
3523 | AdjustedType = Context.adjustFunctionType(AdjustedType, NewTypeInfo); | ||||||
3524 | New->setType(QualType(AdjustedType, 0)); | ||||||
3525 | NewQType = Context.getCanonicalType(New->getType()); | ||||||
3526 | } | ||||||
3527 | |||||||
3528 | // If this redeclaration makes the function inline, we may need to add it to | ||||||
3529 | // UndefinedButUsed. | ||||||
3530 | if (!Old->isInlined() && New->isInlined() && | ||||||
3531 | !New->hasAttr<GNUInlineAttr>() && | ||||||
3532 | !getLangOpts().GNUInline && | ||||||
3533 | Old->isUsed(false) && | ||||||
3534 | !Old->isDefined() && !New->isThisDeclarationADefinition()) | ||||||
3535 | UndefinedButUsed.insert(std::make_pair(Old->getCanonicalDecl(), | ||||||
3536 | SourceLocation())); | ||||||
3537 | |||||||
3538 | // If this redeclaration makes it newly gnu_inline, we don't want to warn | ||||||
3539 | // about it. | ||||||
3540 | if (New->hasAttr<GNUInlineAttr>() && | ||||||
3541 | Old->isInlined() && !Old->hasAttr<GNUInlineAttr>()) { | ||||||
3542 | UndefinedButUsed.erase(Old->getCanonicalDecl()); | ||||||
3543 | } | ||||||
3544 | |||||||
3545 | // If pass_object_size params don't match up perfectly, this isn't a valid | ||||||
3546 | // redeclaration. | ||||||
3547 | if (Old->getNumParams() > 0 && Old->getNumParams() == New->getNumParams() && | ||||||
3548 | !hasIdenticalPassObjectSizeAttrs(Old, New)) { | ||||||
3549 | Diag(New->getLocation(), diag::err_different_pass_object_size_params) | ||||||
3550 | << New->getDeclName(); | ||||||
3551 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3552 | return true; | ||||||
3553 | } | ||||||
3554 | |||||||
3555 | if (getLangOpts().CPlusPlus) { | ||||||
3556 | // C++1z [over.load]p2 | ||||||
3557 | // Certain function declarations cannot be overloaded: | ||||||
3558 | // -- Function declarations that differ only in the return type, | ||||||
3559 | // the exception specification, or both cannot be overloaded. | ||||||
3560 | |||||||
3561 | // Check the exception specifications match. This may recompute the type of | ||||||
3562 | // both Old and New if it resolved exception specifications, so grab the | ||||||
3563 | // types again after this. Because this updates the type, we do this before | ||||||
3564 | // any of the other checks below, which may update the "de facto" NewQType | ||||||
3565 | // but do not necessarily update the type of New. | ||||||
3566 | if (CheckEquivalentExceptionSpec(Old, New)) | ||||||
3567 | return true; | ||||||
3568 | OldQType = Context.getCanonicalType(Old->getType()); | ||||||
3569 | NewQType = Context.getCanonicalType(New->getType()); | ||||||
3570 | |||||||
3571 | // Go back to the type source info to compare the declared return types, | ||||||
3572 | // per C++1y [dcl.type.auto]p13: | ||||||
3573 | // Redeclarations or specializations of a function or function template | ||||||
3574 | // with a declared return type that uses a placeholder type shall also | ||||||
3575 | // use that placeholder, not a deduced type. | ||||||
3576 | QualType OldDeclaredReturnType = Old->getDeclaredReturnType(); | ||||||
3577 | QualType NewDeclaredReturnType = New->getDeclaredReturnType(); | ||||||
3578 | if (!Context.hasSameType(OldDeclaredReturnType, NewDeclaredReturnType) && | ||||||
3579 | canFullyTypeCheckRedeclaration(New, Old, NewDeclaredReturnType, | ||||||
3580 | OldDeclaredReturnType)) { | ||||||
3581 | QualType ResQT; | ||||||
3582 | if (NewDeclaredReturnType->isObjCObjectPointerType() && | ||||||
3583 | OldDeclaredReturnType->isObjCObjectPointerType()) | ||||||
3584 | // FIXME: This does the wrong thing for a deduced return type. | ||||||
3585 | ResQT = Context.mergeObjCGCQualifiers(NewQType, OldQType); | ||||||
3586 | if (ResQT.isNull()) { | ||||||
3587 | if (New->isCXXClassMember() && New->isOutOfLine()) | ||||||
3588 | Diag(New->getLocation(), diag::err_member_def_does_not_match_ret_type) | ||||||
3589 | << New << New->getReturnTypeSourceRange(); | ||||||
3590 | else | ||||||
3591 | Diag(New->getLocation(), diag::err_ovl_diff_return_type) | ||||||
3592 | << New->getReturnTypeSourceRange(); | ||||||
3593 | Diag(OldLocation, PrevDiag) << Old << Old->getType() | ||||||
3594 | << Old->getReturnTypeSourceRange(); | ||||||
3595 | return true; | ||||||
3596 | } | ||||||
3597 | else | ||||||
3598 | NewQType = ResQT; | ||||||
3599 | } | ||||||
3600 | |||||||
3601 | QualType OldReturnType = OldType->getReturnType(); | ||||||
3602 | QualType NewReturnType = cast<FunctionType>(NewQType)->getReturnType(); | ||||||
3603 | if (OldReturnType != NewReturnType) { | ||||||
3604 | // If this function has a deduced return type and has already been | ||||||
3605 | // defined, copy the deduced value from the old declaration. | ||||||
3606 | AutoType *OldAT = Old->getReturnType()->getContainedAutoType(); | ||||||
3607 | if (OldAT && OldAT->isDeduced()) { | ||||||
3608 | New->setType( | ||||||
3609 | SubstAutoType(New->getType(), | ||||||
3610 | OldAT->isDependentType() ? Context.DependentTy | ||||||
3611 | : OldAT->getDeducedType())); | ||||||
3612 | NewQType = Context.getCanonicalType( | ||||||
3613 | SubstAutoType(NewQType, | ||||||
3614 | OldAT->isDependentType() ? Context.DependentTy | ||||||
3615 | : OldAT->getDeducedType())); | ||||||
3616 | } | ||||||
3617 | } | ||||||
3618 | |||||||
3619 | const CXXMethodDecl *OldMethod = dyn_cast<CXXMethodDecl>(Old); | ||||||
3620 | CXXMethodDecl *NewMethod = dyn_cast<CXXMethodDecl>(New); | ||||||
3621 | if (OldMethod && NewMethod) { | ||||||
3622 | // Preserve triviality. | ||||||
3623 | NewMethod->setTrivial(OldMethod->isTrivial()); | ||||||
3624 | |||||||
3625 | // MSVC allows explicit template specialization at class scope: | ||||||
3626 | // 2 CXXMethodDecls referring to the same function will be injected. | ||||||
3627 | // We don't want a redeclaration error. | ||||||
3628 | bool IsClassScopeExplicitSpecialization = | ||||||
3629 | OldMethod->isFunctionTemplateSpecialization() && | ||||||
3630 | NewMethod->isFunctionTemplateSpecialization(); | ||||||
3631 | bool isFriend = NewMethod->getFriendObjectKind(); | ||||||
3632 | |||||||
3633 | if (!isFriend && NewMethod->getLexicalDeclContext()->isRecord() && | ||||||
3634 | !IsClassScopeExplicitSpecialization) { | ||||||
3635 | // -- Member function declarations with the same name and the | ||||||
3636 | // same parameter types cannot be overloaded if any of them | ||||||
3637 | // is a static member function declaration. | ||||||
3638 | if (OldMethod->isStatic() != NewMethod->isStatic()) { | ||||||
3639 | Diag(New->getLocation(), diag::err_ovl_static_nonstatic_member); | ||||||
3640 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3641 | return true; | ||||||
3642 | } | ||||||
3643 | |||||||
3644 | // C++ [class.mem]p1: | ||||||
3645 | // [...] A member shall not be declared twice in the | ||||||
3646 | // member-specification, except that a nested class or member | ||||||
3647 | // class template can be declared and then later defined. | ||||||
3648 | if (!inTemplateInstantiation()) { | ||||||
3649 | unsigned NewDiag; | ||||||
3650 | if (isa<CXXConstructorDecl>(OldMethod)) | ||||||
3651 | NewDiag = diag::err_constructor_redeclared; | ||||||
3652 | else if (isa<CXXDestructorDecl>(NewMethod)) | ||||||
3653 | NewDiag = diag::err_destructor_redeclared; | ||||||
3654 | else if (isa<CXXConversionDecl>(NewMethod)) | ||||||
3655 | NewDiag = diag::err_conv_function_redeclared; | ||||||
3656 | else | ||||||
3657 | NewDiag = diag::err_member_redeclared; | ||||||
3658 | |||||||
3659 | Diag(New->getLocation(), NewDiag); | ||||||
3660 | } else { | ||||||
3661 | Diag(New->getLocation(), diag::err_member_redeclared_in_instantiation) | ||||||
3662 | << New << New->getType(); | ||||||
3663 | } | ||||||
3664 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3665 | return true; | ||||||
3666 | |||||||
3667 | // Complain if this is an explicit declaration of a special | ||||||
3668 | // member that was initially declared implicitly. | ||||||
3669 | // | ||||||
3670 | // As an exception, it's okay to befriend such methods in order | ||||||
3671 | // to permit the implicit constructor/destructor/operator calls. | ||||||
3672 | } else if (OldMethod->isImplicit()) { | ||||||
3673 | if (isFriend) { | ||||||
3674 | NewMethod->setImplicit(); | ||||||
3675 | } else { | ||||||
3676 | Diag(NewMethod->getLocation(), | ||||||
3677 | diag::err_definition_of_implicitly_declared_member) | ||||||
3678 | << New << getSpecialMember(OldMethod); | ||||||
3679 | return true; | ||||||
3680 | } | ||||||
3681 | } else if (OldMethod->getFirstDecl()->isExplicitlyDefaulted() && !isFriend) { | ||||||
3682 | Diag(NewMethod->getLocation(), | ||||||
3683 | diag::err_definition_of_explicitly_defaulted_member) | ||||||
3684 | << getSpecialMember(OldMethod); | ||||||
3685 | return true; | ||||||
3686 | } | ||||||
3687 | } | ||||||
3688 | |||||||
3689 | // C++11 [dcl.attr.noreturn]p1: | ||||||
3690 | // The first declaration of a function shall specify the noreturn | ||||||
3691 | // attribute if any declaration of that function specifies the noreturn | ||||||
3692 | // attribute. | ||||||
3693 | if (const auto *NRA = New->getAttr<CXX11NoReturnAttr>()) | ||||||
3694 | if (!Old->hasAttr<CXX11NoReturnAttr>()) { | ||||||
3695 | Diag(NRA->getLocation(), diag::err_attribute_missing_on_first_decl) | ||||||
3696 | << NRA; | ||||||
3697 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
3698 | } | ||||||
3699 | |||||||
3700 | // C++11 [dcl.attr.depend]p2: | ||||||
3701 | // The first declaration of a function shall specify the | ||||||
3702 | // carries_dependency attribute for its declarator-id if any declaration | ||||||
3703 | // of the function specifies the carries_dependency attribute. | ||||||
3704 | const CarriesDependencyAttr *CDA = New->getAttr<CarriesDependencyAttr>(); | ||||||
3705 | if (CDA && !Old->hasAttr<CarriesDependencyAttr>()) { | ||||||
3706 | Diag(CDA->getLocation(), | ||||||
3707 | diag::err_carries_dependency_missing_on_first_decl) << 0/*Function*/; | ||||||
3708 | Diag(Old->getFirstDecl()->getLocation(), | ||||||
3709 | diag::note_carries_dependency_missing_first_decl) << 0/*Function*/; | ||||||
3710 | } | ||||||
3711 | |||||||
3712 | // (C++98 8.3.5p3): | ||||||
3713 | // All declarations for a function shall agree exactly in both the | ||||||
3714 | // return type and the parameter-type-list. | ||||||
3715 | // We also want to respect all the extended bits except noreturn. | ||||||
3716 | |||||||
3717 | // noreturn should now match unless the old type info didn't have it. | ||||||
3718 | QualType OldQTypeForComparison = OldQType; | ||||||
3719 | if (!OldTypeInfo.getNoReturn() && NewTypeInfo.getNoReturn()) { | ||||||
3720 | auto *OldType = OldQType->castAs<FunctionProtoType>(); | ||||||
3721 | const FunctionType *OldTypeForComparison | ||||||
3722 | = Context.adjustFunctionType(OldType, OldTypeInfo.withNoReturn(true)); | ||||||
3723 | OldQTypeForComparison = QualType(OldTypeForComparison, 0); | ||||||
3724 | assert(OldQTypeForComparison.isCanonical())(static_cast <bool> (OldQTypeForComparison.isCanonical( )) ? void (0) : __assert_fail ("OldQTypeForComparison.isCanonical()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 3724, __extension__ __PRETTY_FUNCTION__)); | ||||||
3725 | } | ||||||
3726 | |||||||
3727 | if (haveIncompatibleLanguageLinkages(Old, New)) { | ||||||
3728 | // As a special case, retain the language linkage from previous | ||||||
3729 | // declarations of a friend function as an extension. | ||||||
3730 | // | ||||||
3731 | // This liberal interpretation of C++ [class.friend]p3 matches GCC/MSVC | ||||||
3732 | // and is useful because there's otherwise no way to specify language | ||||||
3733 | // linkage within class scope. | ||||||
3734 | // | ||||||
3735 | // Check cautiously as the friend object kind isn't yet complete. | ||||||
3736 | if (New->getFriendObjectKind() != Decl::FOK_None) { | ||||||
3737 | Diag(New->getLocation(), diag::ext_retained_language_linkage) << New; | ||||||
3738 | Diag(OldLocation, PrevDiag); | ||||||
3739 | } else { | ||||||
3740 | Diag(New->getLocation(), diag::err_different_language_linkage) << New; | ||||||
3741 | Diag(OldLocation, PrevDiag); | ||||||
3742 | return true; | ||||||
3743 | } | ||||||
3744 | } | ||||||
3745 | |||||||
3746 | // If the function types are compatible, merge the declarations. Ignore the | ||||||
3747 | // exception specifier because it was already checked above in | ||||||
3748 | // CheckEquivalentExceptionSpec, and we don't want follow-on diagnostics | ||||||
3749 | // about incompatible types under -fms-compatibility. | ||||||
3750 | if (Context.hasSameFunctionTypeIgnoringExceptionSpec(OldQTypeForComparison, | ||||||
3751 | NewQType)) | ||||||
3752 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3753 | |||||||
3754 | // If the types are imprecise (due to dependent constructs in friends or | ||||||
3755 | // local extern declarations), it's OK if they differ. We'll check again | ||||||
3756 | // during instantiation. | ||||||
3757 | if (!canFullyTypeCheckRedeclaration(New, Old, NewQType, OldQType)) | ||||||
3758 | return false; | ||||||
3759 | |||||||
3760 | // Fall through for conflicting redeclarations and redefinitions. | ||||||
3761 | } | ||||||
3762 | |||||||
3763 | // C: Function types need to be compatible, not identical. This handles | ||||||
3764 | // duplicate function decls like "void f(int); void f(enum X);" properly. | ||||||
3765 | if (!getLangOpts().CPlusPlus && | ||||||
3766 | Context.typesAreCompatible(OldQType, NewQType)) { | ||||||
3767 | const FunctionType *OldFuncType = OldQType->getAs<FunctionType>(); | ||||||
3768 | const FunctionType *NewFuncType = NewQType->getAs<FunctionType>(); | ||||||
3769 | const FunctionProtoType *OldProto = nullptr; | ||||||
3770 | if (MergeTypeWithOld && isa<FunctionNoProtoType>(NewFuncType) && | ||||||
3771 | (OldProto = dyn_cast<FunctionProtoType>(OldFuncType))) { | ||||||
3772 | // The old declaration provided a function prototype, but the | ||||||
3773 | // new declaration does not. Merge in the prototype. | ||||||
3774 | assert(!OldProto->hasExceptionSpec() && "Exception spec in C")(static_cast <bool> (!OldProto->hasExceptionSpec() && "Exception spec in C") ? void (0) : __assert_fail ("!OldProto->hasExceptionSpec() && \"Exception spec in C\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 3774, __extension__ __PRETTY_FUNCTION__)); | ||||||
3775 | SmallVector<QualType, 16> ParamTypes(OldProto->param_types()); | ||||||
3776 | NewQType = | ||||||
3777 | Context.getFunctionType(NewFuncType->getReturnType(), ParamTypes, | ||||||
3778 | OldProto->getExtProtoInfo()); | ||||||
3779 | New->setType(NewQType); | ||||||
3780 | New->setHasInheritedPrototype(); | ||||||
3781 | |||||||
3782 | // Synthesize parameters with the same types. | ||||||
3783 | SmallVector<ParmVarDecl*, 16> Params; | ||||||
3784 | for (const auto &ParamType : OldProto->param_types()) { | ||||||
3785 | ParmVarDecl *Param = ParmVarDecl::Create(Context, New, SourceLocation(), | ||||||
3786 | SourceLocation(), nullptr, | ||||||
3787 | ParamType, /*TInfo=*/nullptr, | ||||||
3788 | SC_None, nullptr); | ||||||
3789 | Param->setScopeInfo(0, Params.size()); | ||||||
3790 | Param->setImplicit(); | ||||||
3791 | Params.push_back(Param); | ||||||
3792 | } | ||||||
3793 | |||||||
3794 | New->setParams(Params); | ||||||
3795 | } | ||||||
3796 | |||||||
3797 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3798 | } | ||||||
3799 | |||||||
3800 | // Check if the function types are compatible when pointer size address | ||||||
3801 | // spaces are ignored. | ||||||
3802 | if (Context.hasSameFunctionTypeIgnoringPtrSizes(OldQType, NewQType)) | ||||||
3803 | return false; | ||||||
3804 | |||||||
3805 | // GNU C permits a K&R definition to follow a prototype declaration | ||||||
3806 | // if the declared types of the parameters in the K&R definition | ||||||
3807 | // match the types in the prototype declaration, even when the | ||||||
3808 | // promoted types of the parameters from the K&R definition differ | ||||||
3809 | // from the types in the prototype. GCC then keeps the types from | ||||||
3810 | // the prototype. | ||||||
3811 | // | ||||||
3812 | // If a variadic prototype is followed by a non-variadic K&R definition, | ||||||
3813 | // the K&R definition becomes variadic. This is sort of an edge case, but | ||||||
3814 | // it's legal per the standard depending on how you read C99 6.7.5.3p15 and | ||||||
3815 | // C99 6.9.1p8. | ||||||
3816 | if (!getLangOpts().CPlusPlus && | ||||||
3817 | Old->hasPrototype() && !New->hasPrototype() && | ||||||
3818 | New->getType()->getAs<FunctionProtoType>() && | ||||||
3819 | Old->getNumParams() == New->getNumParams()) { | ||||||
3820 | SmallVector<QualType, 16> ArgTypes; | ||||||
3821 | SmallVector<GNUCompatibleParamWarning, 16> Warnings; | ||||||
3822 | const FunctionProtoType *OldProto | ||||||
3823 | = Old->getType()->getAs<FunctionProtoType>(); | ||||||
3824 | const FunctionProtoType *NewProto | ||||||
3825 | = New->getType()->getAs<FunctionProtoType>(); | ||||||
3826 | |||||||
3827 | // Determine whether this is the GNU C extension. | ||||||
3828 | QualType MergedReturn = Context.mergeTypes(OldProto->getReturnType(), | ||||||
3829 | NewProto->getReturnType()); | ||||||
3830 | bool LooseCompatible = !MergedReturn.isNull(); | ||||||
3831 | for (unsigned Idx = 0, End = Old->getNumParams(); | ||||||
3832 | LooseCompatible && Idx != End; ++Idx) { | ||||||
3833 | ParmVarDecl *OldParm = Old->getParamDecl(Idx); | ||||||
3834 | ParmVarDecl *NewParm = New->getParamDecl(Idx); | ||||||
3835 | if (Context.typesAreCompatible(OldParm->getType(), | ||||||
3836 | NewProto->getParamType(Idx))) { | ||||||
3837 | ArgTypes.push_back(NewParm->getType()); | ||||||
3838 | } else if (Context.typesAreCompatible(OldParm->getType(), | ||||||
3839 | NewParm->getType(), | ||||||
3840 | /*CompareUnqualified=*/true)) { | ||||||
3841 | GNUCompatibleParamWarning Warn = { OldParm, NewParm, | ||||||
3842 | NewProto->getParamType(Idx) }; | ||||||
3843 | Warnings.push_back(Warn); | ||||||
3844 | ArgTypes.push_back(NewParm->getType()); | ||||||
3845 | } else | ||||||
3846 | LooseCompatible = false; | ||||||
3847 | } | ||||||
3848 | |||||||
3849 | if (LooseCompatible) { | ||||||
3850 | for (unsigned Warn = 0; Warn < Warnings.size(); ++Warn) { | ||||||
3851 | Diag(Warnings[Warn].NewParm->getLocation(), | ||||||
3852 | diag::ext_param_promoted_not_compatible_with_prototype) | ||||||
3853 | << Warnings[Warn].PromotedType | ||||||
3854 | << Warnings[Warn].OldParm->getType(); | ||||||
3855 | if (Warnings[Warn].OldParm->getLocation().isValid()) | ||||||
3856 | Diag(Warnings[Warn].OldParm->getLocation(), | ||||||
3857 | diag::note_previous_declaration); | ||||||
3858 | } | ||||||
3859 | |||||||
3860 | if (MergeTypeWithOld) | ||||||
3861 | New->setType(Context.getFunctionType(MergedReturn, ArgTypes, | ||||||
3862 | OldProto->getExtProtoInfo())); | ||||||
3863 | return MergeCompatibleFunctionDecls(New, Old, S, MergeTypeWithOld); | ||||||
3864 | } | ||||||
3865 | |||||||
3866 | // Fall through to diagnose conflicting types. | ||||||
3867 | } | ||||||
3868 | |||||||
3869 | // A function that has already been declared has been redeclared or | ||||||
3870 | // defined with a different type; show an appropriate diagnostic. | ||||||
3871 | |||||||
3872 | // If the previous declaration was an implicitly-generated builtin | ||||||
3873 | // declaration, then at the very least we should use a specialized note. | ||||||
3874 | unsigned BuiltinID; | ||||||
3875 | if (Old->isImplicit() && (BuiltinID = Old->getBuiltinID())) { | ||||||
3876 | // If it's actually a library-defined builtin function like 'malloc' | ||||||
3877 | // or 'printf', just warn about the incompatible redeclaration. | ||||||
3878 | if (Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID)) { | ||||||
3879 | Diag(New->getLocation(), diag::warn_redecl_library_builtin) << New; | ||||||
3880 | Diag(OldLocation, diag::note_previous_builtin_declaration) | ||||||
3881 | << Old << Old->getType(); | ||||||
3882 | return false; | ||||||
3883 | } | ||||||
3884 | |||||||
3885 | PrevDiag = diag::note_previous_builtin_declaration; | ||||||
3886 | } | ||||||
3887 | |||||||
3888 | Diag(New->getLocation(), diag::err_conflicting_types) << New->getDeclName(); | ||||||
3889 | Diag(OldLocation, PrevDiag) << Old << Old->getType(); | ||||||
3890 | return true; | ||||||
3891 | } | ||||||
3892 | |||||||
3893 | /// Completes the merge of two function declarations that are | ||||||
3894 | /// known to be compatible. | ||||||
3895 | /// | ||||||
3896 | /// This routine handles the merging of attributes and other | ||||||
3897 | /// properties of function declarations from the old declaration to | ||||||
3898 | /// the new declaration, once we know that New is in fact a | ||||||
3899 | /// redeclaration of Old. | ||||||
3900 | /// | ||||||
3901 | /// \returns false | ||||||
3902 | bool Sema::MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, | ||||||
3903 | Scope *S, bool MergeTypeWithOld) { | ||||||
3904 | // Merge the attributes | ||||||
3905 | mergeDeclAttributes(New, Old); | ||||||
3906 | |||||||
3907 | // Merge "pure" flag. | ||||||
3908 | if (Old->isPure()) | ||||||
3909 | New->setPure(); | ||||||
3910 | |||||||
3911 | // Merge "used" flag. | ||||||
3912 | if (Old->getMostRecentDecl()->isUsed(false)) | ||||||
3913 | New->setIsUsed(); | ||||||
3914 | |||||||
3915 | // Merge attributes from the parameters. These can mismatch with K&R | ||||||
3916 | // declarations. | ||||||
3917 | if (New->getNumParams() == Old->getNumParams()) | ||||||
3918 | for (unsigned i = 0, e = New->getNumParams(); i != e; ++i) { | ||||||
3919 | ParmVarDecl *NewParam = New->getParamDecl(i); | ||||||
3920 | ParmVarDecl *OldParam = Old->getParamDecl(i); | ||||||
3921 | mergeParamDeclAttributes(NewParam, OldParam, *this); | ||||||
3922 | mergeParamDeclTypes(NewParam, OldParam, *this); | ||||||
3923 | } | ||||||
3924 | |||||||
3925 | if (getLangOpts().CPlusPlus) | ||||||
3926 | return MergeCXXFunctionDecl(New, Old, S); | ||||||
3927 | |||||||
3928 | // Merge the function types so the we get the composite types for the return | ||||||
3929 | // and argument types. Per C11 6.2.7/4, only update the type if the old decl | ||||||
3930 | // was visible. | ||||||
3931 | QualType Merged = Context.mergeTypes(Old->getType(), New->getType()); | ||||||
3932 | if (!Merged.isNull() && MergeTypeWithOld) | ||||||
3933 | New->setType(Merged); | ||||||
3934 | |||||||
3935 | return false; | ||||||
3936 | } | ||||||
3937 | |||||||
3938 | void Sema::mergeObjCMethodDecls(ObjCMethodDecl *newMethod, | ||||||
3939 | ObjCMethodDecl *oldMethod) { | ||||||
3940 | // Merge the attributes, including deprecated/unavailable | ||||||
3941 | AvailabilityMergeKind MergeKind = | ||||||
3942 | isa<ObjCProtocolDecl>(oldMethod->getDeclContext()) | ||||||
3943 | ? (oldMethod->isOptional() ? AMK_OptionalProtocolImplementation | ||||||
3944 | : AMK_ProtocolImplementation) | ||||||
3945 | : isa<ObjCImplDecl>(newMethod->getDeclContext()) ? AMK_Redeclaration | ||||||
3946 | : AMK_Override; | ||||||
3947 | |||||||
3948 | mergeDeclAttributes(newMethod, oldMethod, MergeKind); | ||||||
3949 | |||||||
3950 | // Merge attributes from the parameters. | ||||||
3951 | ObjCMethodDecl::param_const_iterator oi = oldMethod->param_begin(), | ||||||
3952 | oe = oldMethod->param_end(); | ||||||
3953 | for (ObjCMethodDecl::param_iterator | ||||||
3954 | ni = newMethod->param_begin(), ne = newMethod->param_end(); | ||||||
3955 | ni != ne && oi != oe; ++ni, ++oi) | ||||||
3956 | mergeParamDeclAttributes(*ni, *oi, *this); | ||||||
3957 | |||||||
3958 | CheckObjCMethodOverride(newMethod, oldMethod); | ||||||
3959 | } | ||||||
3960 | |||||||
3961 | static void diagnoseVarDeclTypeMismatch(Sema &S, VarDecl *New, VarDecl* Old) { | ||||||
3962 | assert(!S.Context.hasSameType(New->getType(), Old->getType()))(static_cast <bool> (!S.Context.hasSameType(New->getType (), Old->getType())) ? void (0) : __assert_fail ("!S.Context.hasSameType(New->getType(), Old->getType())" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 3962, __extension__ __PRETTY_FUNCTION__)); | ||||||
3963 | |||||||
3964 | S.Diag(New->getLocation(), New->isThisDeclarationADefinition() | ||||||
3965 | ? diag::err_redefinition_different_type | ||||||
3966 | : diag::err_redeclaration_different_type) | ||||||
3967 | << New->getDeclName() << New->getType() << Old->getType(); | ||||||
3968 | |||||||
3969 | diag::kind PrevDiag; | ||||||
3970 | SourceLocation OldLocation; | ||||||
3971 | std::tie(PrevDiag, OldLocation) | ||||||
3972 | = getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
3973 | S.Diag(OldLocation, PrevDiag); | ||||||
3974 | New->setInvalidDecl(); | ||||||
3975 | } | ||||||
3976 | |||||||
3977 | /// MergeVarDeclTypes - We parsed a variable 'New' which has the same name and | ||||||
3978 | /// scope as a previous declaration 'Old'. Figure out how to merge their types, | ||||||
3979 | /// emitting diagnostics as appropriate. | ||||||
3980 | /// | ||||||
3981 | /// Declarations using the auto type specifier (C++ [decl.spec.auto]) call back | ||||||
3982 | /// to here in AddInitializerToDecl. We can't check them before the initializer | ||||||
3983 | /// is attached. | ||||||
3984 | void Sema::MergeVarDeclTypes(VarDecl *New, VarDecl *Old, | ||||||
3985 | bool MergeTypeWithOld) { | ||||||
3986 | if (New->isInvalidDecl() || Old->isInvalidDecl()) | ||||||
3987 | return; | ||||||
3988 | |||||||
3989 | QualType MergedT; | ||||||
3990 | if (getLangOpts().CPlusPlus) { | ||||||
3991 | if (New->getType()->isUndeducedType()) { | ||||||
3992 | // We don't know what the new type is until the initializer is attached. | ||||||
3993 | return; | ||||||
3994 | } else if (Context.hasSameType(New->getType(), Old->getType())) { | ||||||
3995 | // These could still be something that needs exception specs checked. | ||||||
3996 | return MergeVarDeclExceptionSpecs(New, Old); | ||||||
3997 | } | ||||||
3998 | // C++ [basic.link]p10: | ||||||
3999 | // [...] the types specified by all declarations referring to a given | ||||||
4000 | // object or function shall be identical, except that declarations for an | ||||||
4001 | // array object can specify array types that differ by the presence or | ||||||
4002 | // absence of a major array bound (8.3.4). | ||||||
4003 | else if (Old->getType()->isArrayType() && New->getType()->isArrayType()) { | ||||||
4004 | const ArrayType *OldArray = Context.getAsArrayType(Old->getType()); | ||||||
4005 | const ArrayType *NewArray = Context.getAsArrayType(New->getType()); | ||||||
4006 | |||||||
4007 | // We are merging a variable declaration New into Old. If it has an array | ||||||
4008 | // bound, and that bound differs from Old's bound, we should diagnose the | ||||||
4009 | // mismatch. | ||||||
4010 | if (!NewArray->isIncompleteArrayType() && !NewArray->isDependentType()) { | ||||||
4011 | for (VarDecl *PrevVD = Old->getMostRecentDecl(); PrevVD; | ||||||
4012 | PrevVD = PrevVD->getPreviousDecl()) { | ||||||
4013 | QualType PrevVDTy = PrevVD->getType(); | ||||||
4014 | if (PrevVDTy->isIncompleteArrayType() || PrevVDTy->isDependentType()) | ||||||
4015 | continue; | ||||||
4016 | |||||||
4017 | if (!Context.hasSameType(New->getType(), PrevVDTy)) | ||||||
4018 | return diagnoseVarDeclTypeMismatch(*this, New, PrevVD); | ||||||
4019 | } | ||||||
4020 | } | ||||||
4021 | |||||||
4022 | if (OldArray->isIncompleteArrayType() && NewArray->isArrayType()) { | ||||||
4023 | if (Context.hasSameType(OldArray->getElementType(), | ||||||
4024 | NewArray->getElementType())) | ||||||
4025 | MergedT = New->getType(); | ||||||
4026 | } | ||||||
4027 | // FIXME: Check visibility. New is hidden but has a complete type. If New | ||||||
4028 | // has no array bound, it should not inherit one from Old, if Old is not | ||||||
4029 | // visible. | ||||||
4030 | else if (OldArray->isArrayType() && NewArray->isIncompleteArrayType()) { | ||||||
4031 | if (Context.hasSameType(OldArray->getElementType(), | ||||||
4032 | NewArray->getElementType())) | ||||||
4033 | MergedT = Old->getType(); | ||||||
4034 | } | ||||||
4035 | } | ||||||
4036 | else if (New->getType()->isObjCObjectPointerType() && | ||||||
4037 | Old->getType()->isObjCObjectPointerType()) { | ||||||
4038 | MergedT = Context.mergeObjCGCQualifiers(New->getType(), | ||||||
4039 | Old->getType()); | ||||||
4040 | } | ||||||
4041 | } else { | ||||||
4042 | // C 6.2.7p2: | ||||||
4043 | // All declarations that refer to the same object or function shall have | ||||||
4044 | // compatible type. | ||||||
4045 | MergedT = Context.mergeTypes(New->getType(), Old->getType()); | ||||||
4046 | } | ||||||
4047 | if (MergedT.isNull()) { | ||||||
4048 | // It's OK if we couldn't merge types if either type is dependent, for a | ||||||
4049 | // block-scope variable. In other cases (static data members of class | ||||||
4050 | // templates, variable templates, ...), we require the types to be | ||||||
4051 | // equivalent. | ||||||
4052 | // FIXME: The C++ standard doesn't say anything about this. | ||||||
4053 | if ((New->getType()->isDependentType() || | ||||||
4054 | Old->getType()->isDependentType()) && New->isLocalVarDecl()) { | ||||||
4055 | // If the old type was dependent, we can't merge with it, so the new type | ||||||
4056 | // becomes dependent for now. We'll reproduce the original type when we | ||||||
4057 | // instantiate the TypeSourceInfo for the variable. | ||||||
4058 | if (!New->getType()->isDependentType() && MergeTypeWithOld) | ||||||
4059 | New->setType(Context.DependentTy); | ||||||
4060 | return; | ||||||
4061 | } | ||||||
4062 | return diagnoseVarDeclTypeMismatch(*this, New, Old); | ||||||
4063 | } | ||||||
4064 | |||||||
4065 | // Don't actually update the type on the new declaration if the old | ||||||
4066 | // declaration was an extern declaration in a different scope. | ||||||
4067 | if (MergeTypeWithOld) | ||||||
4068 | New->setType(MergedT); | ||||||
4069 | } | ||||||
4070 | |||||||
4071 | static bool mergeTypeWithPrevious(Sema &S, VarDecl *NewVD, VarDecl *OldVD, | ||||||
4072 | LookupResult &Previous) { | ||||||
4073 | // C11 6.2.7p4: | ||||||
4074 | // For an identifier with internal or external linkage declared | ||||||
4075 | // in a scope in which a prior declaration of that identifier is | ||||||
4076 | // visible, if the prior declaration specifies internal or | ||||||
4077 | // external linkage, the type of the identifier at the later | ||||||
4078 | // declaration becomes the composite type. | ||||||
4079 | // | ||||||
4080 | // If the variable isn't visible, we do not merge with its type. | ||||||
4081 | if (Previous.isShadowed()) | ||||||
4082 | return false; | ||||||
4083 | |||||||
4084 | if (S.getLangOpts().CPlusPlus) { | ||||||
4085 | // C++11 [dcl.array]p3: | ||||||
4086 | // If there is a preceding declaration of the entity in the same | ||||||
4087 | // scope in which the bound was specified, an omitted array bound | ||||||
4088 | // is taken to be the same as in that earlier declaration. | ||||||
4089 | return NewVD->isPreviousDeclInSameBlockScope() || | ||||||
4090 | (!OldVD->getLexicalDeclContext()->isFunctionOrMethod() && | ||||||
4091 | !NewVD->getLexicalDeclContext()->isFunctionOrMethod()); | ||||||
4092 | } else { | ||||||
4093 | // If the old declaration was function-local, don't merge with its | ||||||
4094 | // type unless we're in the same function. | ||||||
4095 | return !OldVD->getLexicalDeclContext()->isFunctionOrMethod() || | ||||||
4096 | OldVD->getLexicalDeclContext() == NewVD->getLexicalDeclContext(); | ||||||
4097 | } | ||||||
4098 | } | ||||||
4099 | |||||||
4100 | /// MergeVarDecl - We just parsed a variable 'New' which has the same name | ||||||
4101 | /// and scope as a previous declaration 'Old'. Figure out how to resolve this | ||||||
4102 | /// situation, merging decls or emitting diagnostics as appropriate. | ||||||
4103 | /// | ||||||
4104 | /// Tentative definition rules (C99 6.9.2p2) are checked by | ||||||
4105 | /// FinalizeDeclaratorGroup. Unfortunately, we can't analyze tentative | ||||||
4106 | /// definitions here, since the initializer hasn't been attached. | ||||||
4107 | /// | ||||||
4108 | void Sema::MergeVarDecl(VarDecl *New, LookupResult &Previous) { | ||||||
4109 | // If the new decl is already invalid, don't do any other checking. | ||||||
4110 | if (New->isInvalidDecl()) | ||||||
4111 | return; | ||||||
4112 | |||||||
4113 | if (!shouldLinkPossiblyHiddenDecl(Previous, New)) | ||||||
4114 | return; | ||||||
4115 | |||||||
4116 | VarTemplateDecl *NewTemplate = New->getDescribedVarTemplate(); | ||||||
4117 | |||||||
4118 | // Verify the old decl was also a variable or variable template. | ||||||
4119 | VarDecl *Old = nullptr; | ||||||
4120 | VarTemplateDecl *OldTemplate = nullptr; | ||||||
4121 | if (Previous.isSingleResult()) { | ||||||
4122 | if (NewTemplate) { | ||||||
4123 | OldTemplate = dyn_cast<VarTemplateDecl>(Previous.getFoundDecl()); | ||||||
4124 | Old = OldTemplate ? OldTemplate->getTemplatedDecl() : nullptr; | ||||||
4125 | |||||||
4126 | if (auto *Shadow = | ||||||
4127 | dyn_cast<UsingShadowDecl>(Previous.getRepresentativeDecl())) | ||||||
4128 | if (checkUsingShadowRedecl<VarTemplateDecl>(*this, Shadow, NewTemplate)) | ||||||
4129 | return New->setInvalidDecl(); | ||||||
4130 | } else { | ||||||
4131 | Old = dyn_cast<VarDecl>(Previous.getFoundDecl()); | ||||||
4132 | |||||||
4133 | if (auto *Shadow = | ||||||
4134 | dyn_cast<UsingShadowDecl>(Previous.getRepresentativeDecl())) | ||||||
4135 | if (checkUsingShadowRedecl<VarDecl>(*this, Shadow, New)) | ||||||
4136 | return New->setInvalidDecl(); | ||||||
4137 | } | ||||||
4138 | } | ||||||
4139 | if (!Old) { | ||||||
4140 | Diag(New->getLocation(), diag::err_redefinition_different_kind) | ||||||
4141 | << New->getDeclName(); | ||||||
4142 | notePreviousDefinition(Previous.getRepresentativeDecl(), | ||||||
4143 | New->getLocation()); | ||||||
4144 | return New->setInvalidDecl(); | ||||||
4145 | } | ||||||
4146 | |||||||
4147 | // If the old declaration was found in an inline namespace and the new | ||||||
4148 | // declaration was qualified, update the DeclContext to match. | ||||||
4149 | adjustDeclContextForDeclaratorDecl(New, Old); | ||||||
4150 | |||||||
4151 | // Ensure the template parameters are compatible. | ||||||
4152 | if (NewTemplate && | ||||||
4153 | !TemplateParameterListsAreEqual(NewTemplate->getTemplateParameters(), | ||||||
4154 | OldTemplate->getTemplateParameters(), | ||||||
4155 | /*Complain=*/true, TPL_TemplateMatch)) | ||||||
4156 | return New->setInvalidDecl(); | ||||||
4157 | |||||||
4158 | // C++ [class.mem]p1: | ||||||
4159 | // A member shall not be declared twice in the member-specification [...] | ||||||
4160 | // | ||||||
4161 | // Here, we need only consider static data members. | ||||||
4162 | if (Old->isStaticDataMember() && !New->isOutOfLine()) { | ||||||
4163 | Diag(New->getLocation(), diag::err_duplicate_member) | ||||||
4164 | << New->getIdentifier(); | ||||||
4165 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
4166 | New->setInvalidDecl(); | ||||||
4167 | } | ||||||
4168 | |||||||
4169 | mergeDeclAttributes(New, Old); | ||||||
4170 | // Warn if an already-declared variable is made a weak_import in a subsequent | ||||||
4171 | // declaration | ||||||
4172 | if (New->hasAttr<WeakImportAttr>() && | ||||||
4173 | Old->getStorageClass() == SC_None && | ||||||
4174 | !Old->hasAttr<WeakImportAttr>()) { | ||||||
4175 | Diag(New->getLocation(), diag::warn_weak_import) << New->getDeclName(); | ||||||
4176 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
4177 | // Remove weak_import attribute on new declaration. | ||||||
4178 | New->dropAttr<WeakImportAttr>(); | ||||||
4179 | } | ||||||
4180 | |||||||
4181 | if (const auto *ILA = New->getAttr<InternalLinkageAttr>()) | ||||||
4182 | if (!Old->hasAttr<InternalLinkageAttr>()) { | ||||||
4183 | Diag(New->getLocation(), diag::err_attribute_missing_on_first_decl) | ||||||
4184 | << ILA; | ||||||
4185 | Diag(Old->getLocation(), diag::note_previous_declaration); | ||||||
4186 | New->dropAttr<InternalLinkageAttr>(); | ||||||
4187 | } | ||||||
4188 | |||||||
4189 | // Merge the types. | ||||||
4190 | VarDecl *MostRecent = Old->getMostRecentDecl(); | ||||||
4191 | if (MostRecent != Old) { | ||||||
4192 | MergeVarDeclTypes(New, MostRecent, | ||||||
4193 | mergeTypeWithPrevious(*this, New, MostRecent, Previous)); | ||||||
4194 | if (New->isInvalidDecl()) | ||||||
4195 | return; | ||||||
4196 | } | ||||||
4197 | |||||||
4198 | MergeVarDeclTypes(New, Old, mergeTypeWithPrevious(*this, New, Old, Previous)); | ||||||
4199 | if (New->isInvalidDecl()) | ||||||
4200 | return; | ||||||
4201 | |||||||
4202 | diag::kind PrevDiag; | ||||||
4203 | SourceLocation OldLocation; | ||||||
4204 | std::tie(PrevDiag, OldLocation) = | ||||||
4205 | getNoteDiagForInvalidRedeclaration(Old, New); | ||||||
4206 | |||||||
4207 | // [dcl.stc]p8: Check if we have a non-static decl followed by a static. | ||||||
4208 | if (New->getStorageClass() == SC_Static && | ||||||
4209 | !New->isStaticDataMember() && | ||||||
4210 | Old->hasExternalFormalLinkage()) { | ||||||
4211 | if (getLangOpts().MicrosoftExt) { | ||||||
4212 | Diag(New->getLocation(), diag::ext_static_non_static) | ||||||
4213 | << New->getDeclName(); | ||||||
4214 | Diag(OldLocation, PrevDiag); | ||||||
4215 | } else { | ||||||
4216 | Diag(New->getLocation(), diag::err_static_non_static) | ||||||
4217 | << New->getDeclName(); | ||||||
4218 | Diag(OldLocation, PrevDiag); | ||||||
4219 | return New->setInvalidDecl(); | ||||||
4220 | } | ||||||
4221 | } | ||||||
4222 | // C99 6.2.2p4: | ||||||
4223 | // For an identifier declared with the storage-class specifier | ||||||
4224 | // extern in a scope in which a prior declaration of that | ||||||
4225 | // identifier is visible,23) if the prior declaration specifies | ||||||
4226 | // internal or external linkage, the linkage of the identifier at | ||||||
4227 | // the later declaration is the same as the linkage specified at | ||||||
4228 | // the prior declaration. If no prior declaration is visible, or | ||||||
4229 | // if the prior declaration specifies no linkage, then the | ||||||
4230 | // identifier has external linkage. | ||||||
4231 | if (New->hasExternalStorage() && Old->hasLinkage()) | ||||||
4232 | /* Okay */; | ||||||
4233 | else if (New->getCanonicalDecl()->getStorageClass() != SC_Static && | ||||||
4234 | !New->isStaticDataMember() && | ||||||
4235 | Old->getCanonicalDecl()->getStorageClass() == SC_Static) { | ||||||
4236 | Diag(New->getLocation(), diag::err_non_static_static) << New->getDeclName(); | ||||||
4237 | Diag(OldLocation, PrevDiag); | ||||||
4238 | return New->setInvalidDecl(); | ||||||
4239 | } | ||||||
4240 | |||||||
4241 | // Check if extern is followed by non-extern and vice-versa. | ||||||
4242 | if (New->hasExternalStorage() && | ||||||
4243 | !Old->hasLinkage() && Old->isLocalVarDeclOrParm()) { | ||||||
4244 | Diag(New->getLocation(), diag::err_extern_non_extern) << New->getDeclName(); | ||||||
4245 | Diag(OldLocation, PrevDiag); | ||||||
4246 | return New->setInvalidDecl(); | ||||||
4247 | } | ||||||
4248 | if (Old->hasLinkage() && New->isLocalVarDeclOrParm() && | ||||||
4249 | !New->hasExternalStorage()) { | ||||||
4250 | Diag(New->getLocation(), diag::err_non_extern_extern) << New->getDeclName(); | ||||||
4251 | Diag(OldLocation, PrevDiag); | ||||||
4252 | return New->setInvalidDecl(); | ||||||
4253 | } | ||||||
4254 | |||||||
4255 | if (CheckRedeclarationModuleOwnership(New, Old)) | ||||||
4256 | return; | ||||||
4257 | |||||||
4258 | // Variables with external linkage are analyzed in FinalizeDeclaratorGroup. | ||||||
4259 | |||||||
4260 | // FIXME: The test for external storage here seems wrong? We still | ||||||
4261 | // need to check for mismatches. | ||||||
4262 | if (!New->hasExternalStorage() && !New->isFileVarDecl() && | ||||||
4263 | // Don't complain about out-of-line definitions of static members. | ||||||
4264 | !(Old->getLexicalDeclContext()->isRecord() && | ||||||
4265 | !New->getLexicalDeclContext()->isRecord())) { | ||||||
4266 | Diag(New->getLocation(), diag::err_redefinition) << New->getDeclName(); | ||||||
4267 | Diag(OldLocation, PrevDiag); | ||||||
4268 | return New->setInvalidDecl(); | ||||||
4269 | } | ||||||
4270 | |||||||
4271 | if (New->isInline() && !Old->getMostRecentDecl()->isInline()) { | ||||||
4272 | if (VarDecl *Def = Old->getDefinition()) { | ||||||
4273 | // C++1z [dcl.fcn.spec]p4: | ||||||
4274 | // If the definition of a variable appears in a translation unit before | ||||||
4275 | // its first declaration as inline, the program is ill-formed. | ||||||
4276 | Diag(New->getLocation(), diag::err_inline_decl_follows_def) << New; | ||||||
4277 | Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
4278 | } | ||||||
4279 | } | ||||||
4280 | |||||||
4281 | // If this redeclaration makes the variable inline, we may need to add it to | ||||||
4282 | // UndefinedButUsed. | ||||||
4283 | if (!Old->isInline() && New->isInline() && Old->isUsed(false) && | ||||||
4284 | !Old->getDefinition() && !New->isThisDeclarationADefinition()) | ||||||
4285 | UndefinedButUsed.insert(std::make_pair(Old->getCanonicalDecl(), | ||||||
4286 | SourceLocation())); | ||||||
4287 | |||||||
4288 | if (New->getTLSKind() != Old->getTLSKind()) { | ||||||
4289 | if (!Old->getTLSKind()) { | ||||||
4290 | Diag(New->getLocation(), diag::err_thread_non_thread) << New->getDeclName(); | ||||||
4291 | Diag(OldLocation, PrevDiag); | ||||||
4292 | } else if (!New->getTLSKind()) { | ||||||
4293 | Diag(New->getLocation(), diag::err_non_thread_thread) << New->getDeclName(); | ||||||
4294 | Diag(OldLocation, PrevDiag); | ||||||
4295 | } else { | ||||||
4296 | // Do not allow redeclaration to change the variable between requiring | ||||||
4297 | // static and dynamic initialization. | ||||||
4298 | // FIXME: GCC allows this, but uses the TLS keyword on the first | ||||||
4299 | // declaration to determine the kind. Do we need to be compatible here? | ||||||
4300 | Diag(New->getLocation(), diag::err_thread_thread_different_kind) | ||||||
4301 | << New->getDeclName() << (New->getTLSKind() == VarDecl::TLS_Dynamic); | ||||||
4302 | Diag(OldLocation, PrevDiag); | ||||||
4303 | } | ||||||
4304 | } | ||||||
4305 | |||||||
4306 | // C++ doesn't have tentative definitions, so go right ahead and check here. | ||||||
4307 | if (getLangOpts().CPlusPlus && | ||||||
4308 | New->isThisDeclarationADefinition() == VarDecl::Definition) { | ||||||
4309 | if (Old->isStaticDataMember() && Old->getCanonicalDecl()->isInline() && | ||||||
4310 | Old->getCanonicalDecl()->isConstexpr()) { | ||||||
4311 | // This definition won't be a definition any more once it's been merged. | ||||||
4312 | Diag(New->getLocation(), | ||||||
4313 | diag::warn_deprecated_redundant_constexpr_static_def); | ||||||
4314 | } else if (VarDecl *Def = Old->getDefinition()) { | ||||||
4315 | if (checkVarDeclRedefinition(Def, New)) | ||||||
4316 | return; | ||||||
4317 | } | ||||||
4318 | } | ||||||
4319 | |||||||
4320 | if (haveIncompatibleLanguageLinkages(Old, New)) { | ||||||
4321 | Diag(New->getLocation(), diag::err_different_language_linkage) << New; | ||||||
4322 | Diag(OldLocation, PrevDiag); | ||||||
4323 | New->setInvalidDecl(); | ||||||
4324 | return; | ||||||
4325 | } | ||||||
4326 | |||||||
4327 | // Merge "used" flag. | ||||||
4328 | if (Old->getMostRecentDecl()->isUsed(false)) | ||||||
4329 | New->setIsUsed(); | ||||||
4330 | |||||||
4331 | // Keep a chain of previous declarations. | ||||||
4332 | New->setPreviousDecl(Old); | ||||||
4333 | if (NewTemplate) | ||||||
4334 | NewTemplate->setPreviousDecl(OldTemplate); | ||||||
4335 | |||||||
4336 | // Inherit access appropriately. | ||||||
4337 | New->setAccess(Old->getAccess()); | ||||||
4338 | if (NewTemplate) | ||||||
4339 | NewTemplate->setAccess(New->getAccess()); | ||||||
4340 | |||||||
4341 | if (Old->isInline()) | ||||||
4342 | New->setImplicitlyInline(); | ||||||
4343 | } | ||||||
4344 | |||||||
4345 | void Sema::notePreviousDefinition(const NamedDecl *Old, SourceLocation New) { | ||||||
4346 | SourceManager &SrcMgr = getSourceManager(); | ||||||
4347 | auto FNewDecLoc = SrcMgr.getDecomposedLoc(New); | ||||||
4348 | auto FOldDecLoc = SrcMgr.getDecomposedLoc(Old->getLocation()); | ||||||
4349 | auto *FNew = SrcMgr.getFileEntryForID(FNewDecLoc.first); | ||||||
4350 | auto *FOld = SrcMgr.getFileEntryForID(FOldDecLoc.first); | ||||||
4351 | auto &HSI = PP.getHeaderSearchInfo(); | ||||||
4352 | StringRef HdrFilename = | ||||||
4353 | SrcMgr.getFilename(SrcMgr.getSpellingLoc(Old->getLocation())); | ||||||
4354 | |||||||
4355 | auto noteFromModuleOrInclude = [&](Module *Mod, | ||||||
4356 | SourceLocation IncLoc) -> bool { | ||||||
4357 | // Redefinition errors with modules are common with non modular mapped | ||||||
4358 | // headers, example: a non-modular header H in module A that also gets | ||||||
4359 | // included directly in a TU. Pointing twice to the same header/definition | ||||||
4360 | // is confusing, try to get better diagnostics when modules is on. | ||||||
4361 | if (IncLoc.isValid()) { | ||||||
4362 | if (Mod) { | ||||||
4363 | Diag(IncLoc, diag::note_redefinition_modules_same_file) | ||||||
4364 | << HdrFilename.str() << Mod->getFullModuleName(); | ||||||
4365 | if (!Mod->DefinitionLoc.isInvalid()) | ||||||
4366 | Diag(Mod->DefinitionLoc, diag::note_defined_here) | ||||||
4367 | << Mod->getFullModuleName(); | ||||||
4368 | } else { | ||||||
4369 | Diag(IncLoc, diag::note_redefinition_include_same_file) | ||||||
4370 | << HdrFilename.str(); | ||||||
4371 | } | ||||||
4372 | return true; | ||||||
4373 | } | ||||||
4374 | |||||||
4375 | return false; | ||||||
4376 | }; | ||||||
4377 | |||||||
4378 | // Is it the same file and same offset? Provide more information on why | ||||||
4379 | // this leads to a redefinition error. | ||||||
4380 | if (FNew == FOld && FNewDecLoc.second == FOldDecLoc.second) { | ||||||
4381 | SourceLocation OldIncLoc = SrcMgr.getIncludeLoc(FOldDecLoc.first); | ||||||
4382 | SourceLocation NewIncLoc = SrcMgr.getIncludeLoc(FNewDecLoc.first); | ||||||
4383 | bool EmittedDiag = | ||||||
4384 | noteFromModuleOrInclude(Old->getOwningModule(), OldIncLoc); | ||||||
4385 | EmittedDiag |= noteFromModuleOrInclude(getCurrentModule(), NewIncLoc); | ||||||
4386 | |||||||
4387 | // If the header has no guards, emit a note suggesting one. | ||||||
4388 | if (FOld && !HSI.isFileMultipleIncludeGuarded(FOld)) | ||||||
4389 | Diag(Old->getLocation(), diag::note_use_ifdef_guards); | ||||||
4390 | |||||||
4391 | if (EmittedDiag) | ||||||
4392 | return; | ||||||
4393 | } | ||||||
4394 | |||||||
4395 | // Redefinition coming from different files or couldn't do better above. | ||||||
4396 | if (Old->getLocation().isValid()) | ||||||
4397 | Diag(Old->getLocation(), diag::note_previous_definition); | ||||||
4398 | } | ||||||
4399 | |||||||
4400 | /// We've just determined that \p Old and \p New both appear to be definitions | ||||||
4401 | /// of the same variable. Either diagnose or fix the problem. | ||||||
4402 | bool Sema::checkVarDeclRedefinition(VarDecl *Old, VarDecl *New) { | ||||||
4403 | if (!hasVisibleDefinition(Old) && | ||||||
4404 | (New->getFormalLinkage() == InternalLinkage || | ||||||
4405 | New->isInline() || | ||||||
4406 | New->getDescribedVarTemplate() || | ||||||
4407 | New->getNumTemplateParameterLists() || | ||||||
4408 | New->getDeclContext()->isDependentContext())) { | ||||||
4409 | // The previous definition is hidden, and multiple definitions are | ||||||
4410 | // permitted (in separate TUs). Demote this to a declaration. | ||||||
4411 | New->demoteThisDefinitionToDeclaration(); | ||||||
4412 | |||||||
4413 | // Make the canonical definition visible. | ||||||
4414 | if (auto *OldTD = Old->getDescribedVarTemplate()) | ||||||
4415 | makeMergedDefinitionVisible(OldTD); | ||||||
4416 | makeMergedDefinitionVisible(Old); | ||||||
4417 | return false; | ||||||
4418 | } else { | ||||||
4419 | Diag(New->getLocation(), diag::err_redefinition) << New; | ||||||
4420 | notePreviousDefinition(Old, New->getLocation()); | ||||||
4421 | New->setInvalidDecl(); | ||||||
4422 | return true; | ||||||
4423 | } | ||||||
4424 | } | ||||||
4425 | |||||||
4426 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with | ||||||
4427 | /// no declarator (e.g. "struct foo;") is parsed. | ||||||
4428 | Decl * | ||||||
4429 | Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, | ||||||
4430 | RecordDecl *&AnonRecord) { | ||||||
4431 | return ParsedFreeStandingDeclSpec(S, AS, DS, MultiTemplateParamsArg(), false, | ||||||
4432 | AnonRecord); | ||||||
4433 | } | ||||||
4434 | |||||||
4435 | // The MS ABI changed between VS2013 and VS2015 with regard to numbers used to | ||||||
4436 | // disambiguate entities defined in different scopes. | ||||||
4437 | // While the VS2015 ABI fixes potential miscompiles, it is also breaks | ||||||
4438 | // compatibility. | ||||||
4439 | // We will pick our mangling number depending on which version of MSVC is being | ||||||
4440 | // targeted. | ||||||
4441 | static unsigned getMSManglingNumber(const LangOptions &LO, Scope *S) { | ||||||
4442 | return LO.isCompatibleWithMSVC(LangOptions::MSVC2015) | ||||||
4443 | ? S->getMSCurManglingNumber() | ||||||
4444 | : S->getMSLastManglingNumber(); | ||||||
4445 | } | ||||||
4446 | |||||||
4447 | void Sema::handleTagNumbering(const TagDecl *Tag, Scope *TagScope) { | ||||||
4448 | if (!Context.getLangOpts().CPlusPlus) | ||||||
4449 | return; | ||||||
4450 | |||||||
4451 | if (isa<CXXRecordDecl>(Tag->getParent())) { | ||||||
4452 | // If this tag is the direct child of a class, number it if | ||||||
4453 | // it is anonymous. | ||||||
4454 | if (!Tag->getName().empty() || Tag->getTypedefNameForAnonDecl()) | ||||||
4455 | return; | ||||||
4456 | MangleNumberingContext &MCtx = | ||||||
4457 | Context.getManglingNumberContext(Tag->getParent()); | ||||||
4458 | Context.setManglingNumber( | ||||||
4459 | Tag, MCtx.getManglingNumber( | ||||||
4460 | Tag, getMSManglingNumber(getLangOpts(), TagScope))); | ||||||
4461 | return; | ||||||
4462 | } | ||||||
4463 | |||||||
4464 | // If this tag isn't a direct child of a class, number it if it is local. | ||||||
4465 | MangleNumberingContext *MCtx; | ||||||
4466 | Decl *ManglingContextDecl; | ||||||
4467 | std::tie(MCtx, ManglingContextDecl) = | ||||||
4468 | getCurrentMangleNumberContext(Tag->getDeclContext()); | ||||||
4469 | if (MCtx) { | ||||||
4470 | Context.setManglingNumber( | ||||||
4471 | Tag, MCtx->getManglingNumber( | ||||||
4472 | Tag, getMSManglingNumber(getLangOpts(), TagScope))); | ||||||
4473 | } | ||||||
4474 | } | ||||||
4475 | |||||||
4476 | namespace { | ||||||
4477 | struct NonCLikeKind { | ||||||
4478 | enum { | ||||||
4479 | None, | ||||||
4480 | BaseClass, | ||||||
4481 | DefaultMemberInit, | ||||||
4482 | Lambda, | ||||||
4483 | Friend, | ||||||
4484 | OtherMember, | ||||||
4485 | Invalid, | ||||||
4486 | } Kind = None; | ||||||
4487 | SourceRange Range; | ||||||
4488 | |||||||
4489 | explicit operator bool() { return Kind != None; } | ||||||
4490 | }; | ||||||
4491 | } | ||||||
4492 | |||||||
4493 | /// Determine whether a class is C-like, according to the rules of C++ | ||||||
4494 | /// [dcl.typedef] for anonymous classes with typedef names for linkage. | ||||||
4495 | static NonCLikeKind getNonCLikeKindForAnonymousStruct(const CXXRecordDecl *RD) { | ||||||
4496 | if (RD->isInvalidDecl()) | ||||||
4497 | return {NonCLikeKind::Invalid, {}}; | ||||||
4498 | |||||||
4499 | // C++ [dcl.typedef]p9: [P1766R1] | ||||||
4500 | // An unnamed class with a typedef name for linkage purposes shall not | ||||||
4501 | // | ||||||
4502 | // -- have any base classes | ||||||
4503 | if (RD->getNumBases()) | ||||||
4504 | return {NonCLikeKind::BaseClass, | ||||||
4505 | SourceRange(RD->bases_begin()->getBeginLoc(), | ||||||
4506 | RD->bases_end()[-1].getEndLoc())}; | ||||||
4507 | bool Invalid = false; | ||||||
4508 | for (Decl *D : RD->decls()) { | ||||||
4509 | // Don't complain about things we already diagnosed. | ||||||
4510 | if (D->isInvalidDecl()) { | ||||||
4511 | Invalid = true; | ||||||
4512 | continue; | ||||||
4513 | } | ||||||
4514 | |||||||
4515 | // -- have any [...] default member initializers | ||||||
4516 | if (auto *FD = dyn_cast<FieldDecl>(D)) { | ||||||
4517 | if (FD->hasInClassInitializer()) { | ||||||
4518 | auto *Init = FD->getInClassInitializer(); | ||||||
4519 | return {NonCLikeKind::DefaultMemberInit, | ||||||
4520 | Init ? Init->getSourceRange() : D->getSourceRange()}; | ||||||
4521 | } | ||||||
4522 | continue; | ||||||
4523 | } | ||||||
4524 | |||||||
4525 | // FIXME: We don't allow friend declarations. This violates the wording of | ||||||
4526 | // P1766, but not the intent. | ||||||
4527 | if (isa<FriendDecl>(D)) | ||||||
4528 | return {NonCLikeKind::Friend, D->getSourceRange()}; | ||||||
4529 | |||||||
4530 | // -- declare any members other than non-static data members, member | ||||||
4531 | // enumerations, or member classes, | ||||||
4532 | if (isa<StaticAssertDecl>(D) || isa<IndirectFieldDecl>(D) || | ||||||
4533 | isa<EnumDecl>(D)) | ||||||
4534 | continue; | ||||||
4535 | auto *MemberRD = dyn_cast<CXXRecordDecl>(D); | ||||||
4536 | if (!MemberRD) { | ||||||
4537 | if (D->isImplicit()) | ||||||
4538 | continue; | ||||||
4539 | return {NonCLikeKind::OtherMember, D->getSourceRange()}; | ||||||
4540 | } | ||||||
4541 | |||||||
4542 | // -- contain a lambda-expression, | ||||||
4543 | if (MemberRD->isLambda()) | ||||||
4544 | return {NonCLikeKind::Lambda, MemberRD->getSourceRange()}; | ||||||
4545 | |||||||
4546 | // and all member classes shall also satisfy these requirements | ||||||
4547 | // (recursively). | ||||||
4548 | if (MemberRD->isThisDeclarationADefinition()) { | ||||||
4549 | if (auto Kind = getNonCLikeKindForAnonymousStruct(MemberRD)) | ||||||
4550 | return Kind; | ||||||
4551 | } | ||||||
4552 | } | ||||||
4553 | |||||||
4554 | return {Invalid ? NonCLikeKind::Invalid : NonCLikeKind::None, {}}; | ||||||
4555 | } | ||||||
4556 | |||||||
4557 | void Sema::setTagNameForLinkagePurposes(TagDecl *TagFromDeclSpec, | ||||||
4558 | TypedefNameDecl *NewTD) { | ||||||
4559 | if (TagFromDeclSpec->isInvalidDecl()) | ||||||
4560 | return; | ||||||
4561 | |||||||
4562 | // Do nothing if the tag already has a name for linkage purposes. | ||||||
4563 | if (TagFromDeclSpec->hasNameForLinkage()) | ||||||
4564 | return; | ||||||
4565 | |||||||
4566 | // A well-formed anonymous tag must always be a TUK_Definition. | ||||||
4567 | assert(TagFromDeclSpec->isThisDeclarationADefinition())(static_cast <bool> (TagFromDeclSpec->isThisDeclarationADefinition ()) ? void (0) : __assert_fail ("TagFromDeclSpec->isThisDeclarationADefinition()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 4567, __extension__ __PRETTY_FUNCTION__)); | ||||||
4568 | |||||||
4569 | // The type must match the tag exactly; no qualifiers allowed. | ||||||
4570 | if (!Context.hasSameType(NewTD->getUnderlyingType(), | ||||||
4571 | Context.getTagDeclType(TagFromDeclSpec))) { | ||||||
4572 | if (getLangOpts().CPlusPlus) | ||||||
4573 | Context.addTypedefNameForUnnamedTagDecl(TagFromDeclSpec, NewTD); | ||||||
4574 | return; | ||||||
4575 | } | ||||||
4576 | |||||||
4577 | // C++ [dcl.typedef]p9: [P1766R1, applied as DR] | ||||||
4578 | // An unnamed class with a typedef name for linkage purposes shall [be | ||||||
4579 | // C-like]. | ||||||
4580 | // | ||||||
4581 | // FIXME: Also diagnose if we've already computed the linkage. That ideally | ||||||
4582 | // shouldn't happen, but there are constructs that the language rule doesn't | ||||||
4583 | // disallow for which we can't reasonably avoid computing linkage early. | ||||||
4584 | const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(TagFromDeclSpec); | ||||||
4585 | NonCLikeKind NonCLike = RD ? getNonCLikeKindForAnonymousStruct(RD) | ||||||
4586 | : NonCLikeKind(); | ||||||
4587 | bool ChangesLinkage = TagFromDeclSpec->hasLinkageBeenComputed(); | ||||||
4588 | if (NonCLike || ChangesLinkage) { | ||||||
4589 | if (NonCLike.Kind == NonCLikeKind::Invalid) | ||||||
4590 | return; | ||||||
4591 | |||||||
4592 | unsigned DiagID = diag::ext_non_c_like_anon_struct_in_typedef; | ||||||
4593 | if (ChangesLinkage) { | ||||||
4594 | // If the linkage changes, we can't accept this as an extension. | ||||||
4595 | if (NonCLike.Kind == NonCLikeKind::None) | ||||||
4596 | DiagID = diag::err_typedef_changes_linkage; | ||||||
4597 | else | ||||||
4598 | DiagID = diag::err_non_c_like_anon_struct_in_typedef; | ||||||
4599 | } | ||||||
4600 | |||||||
4601 | SourceLocation FixitLoc = | ||||||
4602 | getLocForEndOfToken(TagFromDeclSpec->getInnerLocStart()); | ||||||
4603 | llvm::SmallString<40> TextToInsert; | ||||||
4604 | TextToInsert += ' '; | ||||||
4605 | TextToInsert += NewTD->getIdentifier()->getName(); | ||||||
4606 | |||||||
4607 | Diag(FixitLoc, DiagID) | ||||||
4608 | << isa<TypeAliasDecl>(NewTD) | ||||||
4609 | << FixItHint::CreateInsertion(FixitLoc, TextToInsert); | ||||||
4610 | if (NonCLike.Kind != NonCLikeKind::None) { | ||||||
4611 | Diag(NonCLike.Range.getBegin(), diag::note_non_c_like_anon_struct) | ||||||
4612 | << NonCLike.Kind - 1 << NonCLike.Range; | ||||||
4613 | } | ||||||
4614 | Diag(NewTD->getLocation(), diag::note_typedef_for_linkage_here) | ||||||
4615 | << NewTD << isa<TypeAliasDecl>(NewTD); | ||||||
4616 | |||||||
4617 | if (ChangesLinkage) | ||||||
4618 | return; | ||||||
4619 | } | ||||||
4620 | |||||||
4621 | // Otherwise, set this as the anon-decl typedef for the tag. | ||||||
4622 | TagFromDeclSpec->setTypedefNameForAnonDecl(NewTD); | ||||||
4623 | } | ||||||
4624 | |||||||
4625 | static unsigned GetDiagnosticTypeSpecifierID(DeclSpec::TST T) { | ||||||
4626 | switch (T) { | ||||||
4627 | case DeclSpec::TST_class: | ||||||
4628 | return 0; | ||||||
4629 | case DeclSpec::TST_struct: | ||||||
4630 | return 1; | ||||||
4631 | case DeclSpec::TST_interface: | ||||||
4632 | return 2; | ||||||
4633 | case DeclSpec::TST_union: | ||||||
4634 | return 3; | ||||||
4635 | case DeclSpec::TST_enum: | ||||||
4636 | return 4; | ||||||
4637 | default: | ||||||
4638 | llvm_unreachable("unexpected type specifier")::llvm::llvm_unreachable_internal("unexpected type specifier" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 4638); | ||||||
4639 | } | ||||||
4640 | } | ||||||
4641 | |||||||
4642 | /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with | ||||||
4643 | /// no declarator (e.g. "struct foo;") is parsed. It also accepts template | ||||||
4644 | /// parameters to cope with template friend declarations. | ||||||
4645 | Decl * | ||||||
4646 | Sema::ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, DeclSpec &DS, | ||||||
4647 | MultiTemplateParamsArg TemplateParams, | ||||||
4648 | bool IsExplicitInstantiation, | ||||||
4649 | RecordDecl *&AnonRecord) { | ||||||
4650 | Decl *TagD = nullptr; | ||||||
4651 | TagDecl *Tag = nullptr; | ||||||
4652 | if (DS.getTypeSpecType() == DeclSpec::TST_class || | ||||||
4653 | DS.getTypeSpecType() == DeclSpec::TST_struct || | ||||||
4654 | DS.getTypeSpecType() == DeclSpec::TST_interface || | ||||||
4655 | DS.getTypeSpecType() == DeclSpec::TST_union || | ||||||
4656 | DS.getTypeSpecType() == DeclSpec::TST_enum) { | ||||||
4657 | TagD = DS.getRepAsDecl(); | ||||||
4658 | |||||||
4659 | if (!TagD) // We probably had an error | ||||||
4660 | return nullptr; | ||||||
4661 | |||||||
4662 | // Note that the above type specs guarantee that the | ||||||
4663 | // type rep is a Decl, whereas in many of the others | ||||||
4664 | // it's a Type. | ||||||
4665 | if (isa<TagDecl>(TagD)) | ||||||
4666 | Tag = cast<TagDecl>(TagD); | ||||||
4667 | else if (ClassTemplateDecl *CTD = dyn_cast<ClassTemplateDecl>(TagD)) | ||||||
4668 | Tag = CTD->getTemplatedDecl(); | ||||||
4669 | } | ||||||
4670 | |||||||
4671 | if (Tag) { | ||||||
4672 | handleTagNumbering(Tag, S); | ||||||
4673 | Tag->setFreeStanding(); | ||||||
4674 | if (Tag->isInvalidDecl()) | ||||||
4675 | return Tag; | ||||||
4676 | } | ||||||
4677 | |||||||
4678 | if (unsigned TypeQuals = DS.getTypeQualifiers()) { | ||||||
4679 | // Enforce C99 6.7.3p2: "Types other than pointer types derived from object | ||||||
4680 | // or incomplete types shall not be restrict-qualified." | ||||||
4681 | if (TypeQuals & DeclSpec::TQ_restrict) | ||||||
4682 | Diag(DS.getRestrictSpecLoc(), | ||||||
4683 | diag::err_typecheck_invalid_restrict_not_pointer_noarg) | ||||||
4684 | << DS.getSourceRange(); | ||||||
4685 | } | ||||||
4686 | |||||||
4687 | if (DS.isInlineSpecified()) | ||||||
4688 | Diag(DS.getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
4689 | << getLangOpts().CPlusPlus17; | ||||||
4690 | |||||||
4691 | if (DS.hasConstexprSpecifier()) { | ||||||
4692 | // C++0x [dcl.constexpr]p1: constexpr can only be applied to declarations | ||||||
4693 | // and definitions of functions and variables. | ||||||
4694 | // C++2a [dcl.constexpr]p1: The consteval specifier shall be applied only to | ||||||
4695 | // the declaration of a function or function template | ||||||
4696 | if (Tag) | ||||||
4697 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_tag) | ||||||
4698 | << GetDiagnosticTypeSpecifierID(DS.getTypeSpecType()) | ||||||
4699 | << static_cast<int>(DS.getConstexprSpecifier()); | ||||||
4700 | else | ||||||
4701 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_wrong_decl_kind) | ||||||
4702 | << static_cast<int>(DS.getConstexprSpecifier()); | ||||||
4703 | // Don't emit warnings after this error. | ||||||
4704 | return TagD; | ||||||
4705 | } | ||||||
4706 | |||||||
4707 | DiagnoseFunctionSpecifiers(DS); | ||||||
4708 | |||||||
4709 | if (DS.isFriendSpecified()) { | ||||||
4710 | // If we're dealing with a decl but not a TagDecl, assume that | ||||||
4711 | // whatever routines created it handled the friendship aspect. | ||||||
4712 | if (TagD && !Tag) | ||||||
4713 | return nullptr; | ||||||
4714 | return ActOnFriendTypeDecl(S, DS, TemplateParams); | ||||||
4715 | } | ||||||
4716 | |||||||
4717 | const CXXScopeSpec &SS = DS.getTypeSpecScope(); | ||||||
4718 | bool IsExplicitSpecialization = | ||||||
4719 | !TemplateParams.empty() && TemplateParams.back()->size() == 0; | ||||||
4720 | if (Tag && SS.isNotEmpty() && !Tag->isCompleteDefinition() && | ||||||
4721 | !IsExplicitInstantiation && !IsExplicitSpecialization && | ||||||
4722 | !isa<ClassTemplatePartialSpecializationDecl>(Tag)) { | ||||||
4723 | // Per C++ [dcl.type.elab]p1, a class declaration cannot have a | ||||||
4724 | // nested-name-specifier unless it is an explicit instantiation | ||||||
4725 | // or an explicit specialization. | ||||||
4726 | // | ||||||
4727 | // FIXME: We allow class template partial specializations here too, per the | ||||||
4728 | // obvious intent of DR1819. | ||||||
4729 | // | ||||||
4730 | // Per C++ [dcl.enum]p1, an opaque-enum-declaration can't either. | ||||||
4731 | Diag(SS.getBeginLoc(), diag::err_standalone_class_nested_name_specifier) | ||||||
4732 | << GetDiagnosticTypeSpecifierID(DS.getTypeSpecType()) << SS.getRange(); | ||||||
4733 | return nullptr; | ||||||
4734 | } | ||||||
4735 | |||||||
4736 | // Track whether this decl-specifier declares anything. | ||||||
4737 | bool DeclaresAnything = true; | ||||||
4738 | |||||||
4739 | // Handle anonymous struct definitions. | ||||||
4740 | if (RecordDecl *Record = dyn_cast_or_null<RecordDecl>(Tag)) { | ||||||
4741 | if (!Record->getDeclName() && Record->isCompleteDefinition() && | ||||||
4742 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) { | ||||||
4743 | if (getLangOpts().CPlusPlus || | ||||||
4744 | Record->getDeclContext()->isRecord()) { | ||||||
4745 | // If CurContext is a DeclContext that can contain statements, | ||||||
4746 | // RecursiveASTVisitor won't visit the decls that | ||||||
4747 | // BuildAnonymousStructOrUnion() will put into CurContext. | ||||||
4748 | // Also store them here so that they can be part of the | ||||||
4749 | // DeclStmt that gets created in this case. | ||||||
4750 | // FIXME: Also return the IndirectFieldDecls created by | ||||||
4751 | // BuildAnonymousStructOr union, for the same reason? | ||||||
4752 | if (CurContext->isFunctionOrMethod()) | ||||||
4753 | AnonRecord = Record; | ||||||
4754 | return BuildAnonymousStructOrUnion(S, DS, AS, Record, | ||||||
4755 | Context.getPrintingPolicy()); | ||||||
4756 | } | ||||||
4757 | |||||||
4758 | DeclaresAnything = false; | ||||||
4759 | } | ||||||
4760 | } | ||||||
4761 | |||||||
4762 | // C11 6.7.2.1p2: | ||||||
4763 | // A struct-declaration that does not declare an anonymous structure or | ||||||
4764 | // anonymous union shall contain a struct-declarator-list. | ||||||
4765 | // | ||||||
4766 | // This rule also existed in C89 and C99; the grammar for struct-declaration | ||||||
4767 | // did not permit a struct-declaration without a struct-declarator-list. | ||||||
4768 | if (!getLangOpts().CPlusPlus && CurContext->isRecord() && | ||||||
4769 | DS.getStorageClassSpec() == DeclSpec::SCS_unspecified) { | ||||||
4770 | // Check for Microsoft C extension: anonymous struct/union member. | ||||||
4771 | // Handle 2 kinds of anonymous struct/union: | ||||||
4772 | // struct STRUCT; | ||||||
4773 | // union UNION; | ||||||
4774 | // and | ||||||
4775 | // STRUCT_TYPE; <- where STRUCT_TYPE is a typedef struct. | ||||||
4776 | // UNION_TYPE; <- where UNION_TYPE is a typedef union. | ||||||
4777 | if ((Tag && Tag->getDeclName()) || | ||||||
4778 | DS.getTypeSpecType() == DeclSpec::TST_typename) { | ||||||
4779 | RecordDecl *Record = nullptr; | ||||||
4780 | if (Tag) | ||||||
4781 | Record = dyn_cast<RecordDecl>(Tag); | ||||||
4782 | else if (const RecordType *RT = | ||||||
4783 | DS.getRepAsType().get()->getAsStructureType()) | ||||||
4784 | Record = RT->getDecl(); | ||||||
4785 | else if (const RecordType *UT = DS.getRepAsType().get()->getAsUnionType()) | ||||||
4786 | Record = UT->getDecl(); | ||||||
4787 | |||||||
4788 | if (Record && getLangOpts().MicrosoftExt) { | ||||||
4789 | Diag(DS.getBeginLoc(), diag::ext_ms_anonymous_record) | ||||||
4790 | << Record->isUnion() << DS.getSourceRange(); | ||||||
4791 | return BuildMicrosoftCAnonymousStruct(S, DS, Record); | ||||||
4792 | } | ||||||
4793 | |||||||
4794 | DeclaresAnything = false; | ||||||
4795 | } | ||||||
4796 | } | ||||||
4797 | |||||||
4798 | // Skip all the checks below if we have a type error. | ||||||
4799 | if (DS.getTypeSpecType() == DeclSpec::TST_error || | ||||||
4800 | (TagD && TagD->isInvalidDecl())) | ||||||
4801 | return TagD; | ||||||
4802 | |||||||
4803 | if (getLangOpts().CPlusPlus && | ||||||
4804 | DS.getStorageClassSpec() != DeclSpec::SCS_typedef) | ||||||
4805 | if (EnumDecl *Enum = dyn_cast_or_null<EnumDecl>(Tag)) | ||||||
4806 | if (Enum->enumerator_begin() == Enum->enumerator_end() && | ||||||
4807 | !Enum->getIdentifier() && !Enum->isInvalidDecl()) | ||||||
4808 | DeclaresAnything = false; | ||||||
4809 | |||||||
4810 | if (!DS.isMissingDeclaratorOk()) { | ||||||
4811 | // Customize diagnostic for a typedef missing a name. | ||||||
4812 | if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||||
4813 | Diag(DS.getBeginLoc(), diag::ext_typedef_without_a_name) | ||||||
4814 | << DS.getSourceRange(); | ||||||
4815 | else | ||||||
4816 | DeclaresAnything = false; | ||||||
4817 | } | ||||||
4818 | |||||||
4819 | if (DS.isModulePrivateSpecified() && | ||||||
4820 | Tag && Tag->getDeclContext()->isFunctionOrMethod()) | ||||||
4821 | Diag(DS.getModulePrivateSpecLoc(), diag::err_module_private_local_class) | ||||||
4822 | << Tag->getTagKind() | ||||||
4823 | << FixItHint::CreateRemoval(DS.getModulePrivateSpecLoc()); | ||||||
4824 | |||||||
4825 | ActOnDocumentableDecl(TagD); | ||||||
4826 | |||||||
4827 | // C 6.7/2: | ||||||
4828 | // A declaration [...] shall declare at least a declarator [...], a tag, | ||||||
4829 | // or the members of an enumeration. | ||||||
4830 | // C++ [dcl.dcl]p3: | ||||||
4831 | // [If there are no declarators], and except for the declaration of an | ||||||
4832 | // unnamed bit-field, the decl-specifier-seq shall introduce one or more | ||||||
4833 | // names into the program, or shall redeclare a name introduced by a | ||||||
4834 | // previous declaration. | ||||||
4835 | if (!DeclaresAnything) { | ||||||
4836 | // In C, we allow this as a (popular) extension / bug. Don't bother | ||||||
4837 | // producing further diagnostics for redundant qualifiers after this. | ||||||
4838 | Diag(DS.getBeginLoc(), (IsExplicitInstantiation || !TemplateParams.empty()) | ||||||
4839 | ? diag::err_no_declarators | ||||||
4840 | : diag::ext_no_declarators) | ||||||
4841 | << DS.getSourceRange(); | ||||||
4842 | return TagD; | ||||||
4843 | } | ||||||
4844 | |||||||
4845 | // C++ [dcl.stc]p1: | ||||||
4846 | // If a storage-class-specifier appears in a decl-specifier-seq, [...] the | ||||||
4847 | // init-declarator-list of the declaration shall not be empty. | ||||||
4848 | // C++ [dcl.fct.spec]p1: | ||||||
4849 | // If a cv-qualifier appears in a decl-specifier-seq, the | ||||||
4850 | // init-declarator-list of the declaration shall not be empty. | ||||||
4851 | // | ||||||
4852 | // Spurious qualifiers here appear to be valid in C. | ||||||
4853 | unsigned DiagID = diag::warn_standalone_specifier; | ||||||
4854 | if (getLangOpts().CPlusPlus) | ||||||
4855 | DiagID = diag::ext_standalone_specifier; | ||||||
4856 | |||||||
4857 | // Note that a linkage-specification sets a storage class, but | ||||||
4858 | // 'extern "C" struct foo;' is actually valid and not theoretically | ||||||
4859 | // useless. | ||||||
4860 | if (DeclSpec::SCS SCS = DS.getStorageClassSpec()) { | ||||||
4861 | if (SCS == DeclSpec::SCS_mutable) | ||||||
4862 | // Since mutable is not a viable storage class specifier in C, there is | ||||||
4863 | // no reason to treat it as an extension. Instead, diagnose as an error. | ||||||
4864 | Diag(DS.getStorageClassSpecLoc(), diag::err_mutable_nonmember); | ||||||
4865 | else if (!DS.isExternInLinkageSpec() && SCS != DeclSpec::SCS_typedef) | ||||||
4866 | Diag(DS.getStorageClassSpecLoc(), DiagID) | ||||||
4867 | << DeclSpec::getSpecifierName(SCS); | ||||||
4868 | } | ||||||
4869 | |||||||
4870 | if (DeclSpec::TSCS TSCS = DS.getThreadStorageClassSpec()) | ||||||
4871 | Diag(DS.getThreadStorageClassSpecLoc(), DiagID) | ||||||
4872 | << DeclSpec::getSpecifierName(TSCS); | ||||||
4873 | if (DS.getTypeQualifiers()) { | ||||||
4874 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||||
4875 | Diag(DS.getConstSpecLoc(), DiagID) << "const"; | ||||||
4876 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||||
4877 | Diag(DS.getConstSpecLoc(), DiagID) << "volatile"; | ||||||
4878 | // Restrict is covered above. | ||||||
4879 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||||
4880 | Diag(DS.getAtomicSpecLoc(), DiagID) << "_Atomic"; | ||||||
4881 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||||
4882 | Diag(DS.getUnalignedSpecLoc(), DiagID) << "__unaligned"; | ||||||
4883 | } | ||||||
4884 | |||||||
4885 | // Warn about ignored type attributes, for example: | ||||||
4886 | // __attribute__((aligned)) struct A; | ||||||
4887 | // Attributes should be placed after tag to apply to type declaration. | ||||||
4888 | if (!DS.getAttributes().empty()) { | ||||||
4889 | DeclSpec::TST TypeSpecType = DS.getTypeSpecType(); | ||||||
4890 | if (TypeSpecType == DeclSpec::TST_class || | ||||||
4891 | TypeSpecType == DeclSpec::TST_struct || | ||||||
4892 | TypeSpecType == DeclSpec::TST_interface || | ||||||
4893 | TypeSpecType == DeclSpec::TST_union || | ||||||
4894 | TypeSpecType == DeclSpec::TST_enum) { | ||||||
4895 | for (const ParsedAttr &AL : DS.getAttributes()) | ||||||
4896 | Diag(AL.getLoc(), diag::warn_declspec_attribute_ignored) | ||||||
4897 | << AL << GetDiagnosticTypeSpecifierID(TypeSpecType); | ||||||
4898 | } | ||||||
4899 | } | ||||||
4900 | |||||||
4901 | return TagD; | ||||||
4902 | } | ||||||
4903 | |||||||
4904 | /// We are trying to inject an anonymous member into the given scope; | ||||||
4905 | /// check if there's an existing declaration that can't be overloaded. | ||||||
4906 | /// | ||||||
4907 | /// \return true if this is a forbidden redeclaration | ||||||
4908 | static bool CheckAnonMemberRedeclaration(Sema &SemaRef, | ||||||
4909 | Scope *S, | ||||||
4910 | DeclContext *Owner, | ||||||
4911 | DeclarationName Name, | ||||||
4912 | SourceLocation NameLoc, | ||||||
4913 | bool IsUnion) { | ||||||
4914 | LookupResult R(SemaRef, Name, NameLoc, Sema::LookupMemberName, | ||||||
4915 | Sema::ForVisibleRedeclaration); | ||||||
4916 | if (!SemaRef.LookupName(R, S)) return false; | ||||||
4917 | |||||||
4918 | // Pick a representative declaration. | ||||||
4919 | NamedDecl *PrevDecl = R.getRepresentativeDecl()->getUnderlyingDecl(); | ||||||
4920 | assert(PrevDecl && "Expected a non-null Decl")(static_cast <bool> (PrevDecl && "Expected a non-null Decl" ) ? void (0) : __assert_fail ("PrevDecl && \"Expected a non-null Decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 4920, __extension__ __PRETTY_FUNCTION__)); | ||||||
4921 | |||||||
4922 | if (!SemaRef.isDeclInScope(PrevDecl, Owner, S)) | ||||||
4923 | return false; | ||||||
4924 | |||||||
4925 | SemaRef.Diag(NameLoc, diag::err_anonymous_record_member_redecl) | ||||||
4926 | << IsUnion << Name; | ||||||
4927 | SemaRef.Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
4928 | |||||||
4929 | return true; | ||||||
4930 | } | ||||||
4931 | |||||||
4932 | /// InjectAnonymousStructOrUnionMembers - Inject the members of the | ||||||
4933 | /// anonymous struct or union AnonRecord into the owning context Owner | ||||||
4934 | /// and scope S. This routine will be invoked just after we realize | ||||||
4935 | /// that an unnamed union or struct is actually an anonymous union or | ||||||
4936 | /// struct, e.g., | ||||||
4937 | /// | ||||||
4938 | /// @code | ||||||
4939 | /// union { | ||||||
4940 | /// int i; | ||||||
4941 | /// float f; | ||||||
4942 | /// }; // InjectAnonymousStructOrUnionMembers called here to inject i and | ||||||
4943 | /// // f into the surrounding scope.x | ||||||
4944 | /// @endcode | ||||||
4945 | /// | ||||||
4946 | /// This routine is recursive, injecting the names of nested anonymous | ||||||
4947 | /// structs/unions into the owning context and scope as well. | ||||||
4948 | static bool | ||||||
4949 | InjectAnonymousStructOrUnionMembers(Sema &SemaRef, Scope *S, DeclContext *Owner, | ||||||
4950 | RecordDecl *AnonRecord, AccessSpecifier AS, | ||||||
4951 | SmallVectorImpl<NamedDecl *> &Chaining) { | ||||||
4952 | bool Invalid = false; | ||||||
4953 | |||||||
4954 | // Look every FieldDecl and IndirectFieldDecl with a name. | ||||||
4955 | for (auto *D : AnonRecord->decls()) { | ||||||
4956 | if ((isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D)) && | ||||||
4957 | cast<NamedDecl>(D)->getDeclName()) { | ||||||
4958 | ValueDecl *VD = cast<ValueDecl>(D); | ||||||
4959 | if (CheckAnonMemberRedeclaration(SemaRef, S, Owner, VD->getDeclName(), | ||||||
4960 | VD->getLocation(), | ||||||
4961 | AnonRecord->isUnion())) { | ||||||
4962 | // C++ [class.union]p2: | ||||||
4963 | // The names of the members of an anonymous union shall be | ||||||
4964 | // distinct from the names of any other entity in the | ||||||
4965 | // scope in which the anonymous union is declared. | ||||||
4966 | Invalid = true; | ||||||
4967 | } else { | ||||||
4968 | // C++ [class.union]p2: | ||||||
4969 | // For the purpose of name lookup, after the anonymous union | ||||||
4970 | // definition, the members of the anonymous union are | ||||||
4971 | // considered to have been defined in the scope in which the | ||||||
4972 | // anonymous union is declared. | ||||||
4973 | unsigned OldChainingSize = Chaining.size(); | ||||||
4974 | if (IndirectFieldDecl *IF = dyn_cast<IndirectFieldDecl>(VD)) | ||||||
4975 | Chaining.append(IF->chain_begin(), IF->chain_end()); | ||||||
4976 | else | ||||||
4977 | Chaining.push_back(VD); | ||||||
4978 | |||||||
4979 | assert(Chaining.size() >= 2)(static_cast <bool> (Chaining.size() >= 2) ? void (0 ) : __assert_fail ("Chaining.size() >= 2", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 4979, __extension__ __PRETTY_FUNCTION__)); | ||||||
4980 | NamedDecl **NamedChain = | ||||||
4981 | new (SemaRef.Context)NamedDecl*[Chaining.size()]; | ||||||
4982 | for (unsigned i = 0; i < Chaining.size(); i++) | ||||||
4983 | NamedChain[i] = Chaining[i]; | ||||||
4984 | |||||||
4985 | IndirectFieldDecl *IndirectField = IndirectFieldDecl::Create( | ||||||
4986 | SemaRef.Context, Owner, VD->getLocation(), VD->getIdentifier(), | ||||||
4987 | VD->getType(), {NamedChain, Chaining.size()}); | ||||||
4988 | |||||||
4989 | for (const auto *Attr : VD->attrs()) | ||||||
4990 | IndirectField->addAttr(Attr->clone(SemaRef.Context)); | ||||||
4991 | |||||||
4992 | IndirectField->setAccess(AS); | ||||||
4993 | IndirectField->setImplicit(); | ||||||
4994 | SemaRef.PushOnScopeChains(IndirectField, S); | ||||||
4995 | |||||||
4996 | // That includes picking up the appropriate access specifier. | ||||||
4997 | if (AS != AS_none) IndirectField->setAccess(AS); | ||||||
4998 | |||||||
4999 | Chaining.resize(OldChainingSize); | ||||||
5000 | } | ||||||
5001 | } | ||||||
5002 | } | ||||||
5003 | |||||||
5004 | return Invalid; | ||||||
5005 | } | ||||||
5006 | |||||||
5007 | /// StorageClassSpecToVarDeclStorageClass - Maps a DeclSpec::SCS to | ||||||
5008 | /// a VarDecl::StorageClass. Any error reporting is up to the caller: | ||||||
5009 | /// illegal input values are mapped to SC_None. | ||||||
5010 | static StorageClass | ||||||
5011 | StorageClassSpecToVarDeclStorageClass(const DeclSpec &DS) { | ||||||
5012 | DeclSpec::SCS StorageClassSpec = DS.getStorageClassSpec(); | ||||||
5013 | assert(StorageClassSpec != DeclSpec::SCS_typedef &&(static_cast <bool> (StorageClassSpec != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class VarDecl." ) ? void (0) : __assert_fail ("StorageClassSpec != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class VarDecl.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5014, __extension__ __PRETTY_FUNCTION__)) | ||||||
5014 | "Parser allowed 'typedef' as storage class VarDecl.")(static_cast <bool> (StorageClassSpec != DeclSpec::SCS_typedef && "Parser allowed 'typedef' as storage class VarDecl." ) ? void (0) : __assert_fail ("StorageClassSpec != DeclSpec::SCS_typedef && \"Parser allowed 'typedef' as storage class VarDecl.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5014, __extension__ __PRETTY_FUNCTION__)); | ||||||
5015 | switch (StorageClassSpec) { | ||||||
5016 | case DeclSpec::SCS_unspecified: return SC_None; | ||||||
5017 | case DeclSpec::SCS_extern: | ||||||
5018 | if (DS.isExternInLinkageSpec()) | ||||||
5019 | return SC_None; | ||||||
5020 | return SC_Extern; | ||||||
5021 | case DeclSpec::SCS_static: return SC_Static; | ||||||
5022 | case DeclSpec::SCS_auto: return SC_Auto; | ||||||
5023 | case DeclSpec::SCS_register: return SC_Register; | ||||||
5024 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; | ||||||
5025 | // Illegal SCSs map to None: error reporting is up to the caller. | ||||||
5026 | case DeclSpec::SCS_mutable: // Fall through. | ||||||
5027 | case DeclSpec::SCS_typedef: return SC_None; | ||||||
5028 | } | ||||||
5029 | llvm_unreachable("unknown storage class specifier")::llvm::llvm_unreachable_internal("unknown storage class specifier" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5029); | ||||||
5030 | } | ||||||
5031 | |||||||
5032 | static SourceLocation findDefaultInitializer(const CXXRecordDecl *Record) { | ||||||
5033 | assert(Record->hasInClassInitializer())(static_cast <bool> (Record->hasInClassInitializer() ) ? void (0) : __assert_fail ("Record->hasInClassInitializer()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5033, __extension__ __PRETTY_FUNCTION__)); | ||||||
5034 | |||||||
5035 | for (const auto *I : Record->decls()) { | ||||||
5036 | const auto *FD = dyn_cast<FieldDecl>(I); | ||||||
5037 | if (const auto *IFD = dyn_cast<IndirectFieldDecl>(I)) | ||||||
5038 | FD = IFD->getAnonField(); | ||||||
5039 | if (FD && FD->hasInClassInitializer()) | ||||||
5040 | return FD->getLocation(); | ||||||
5041 | } | ||||||
5042 | |||||||
5043 | llvm_unreachable("couldn't find in-class initializer")::llvm::llvm_unreachable_internal("couldn't find in-class initializer" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5043); | ||||||
5044 | } | ||||||
5045 | |||||||
5046 | static void checkDuplicateDefaultInit(Sema &S, CXXRecordDecl *Parent, | ||||||
5047 | SourceLocation DefaultInitLoc) { | ||||||
5048 | if (!Parent->isUnion() || !Parent->hasInClassInitializer()) | ||||||
5049 | return; | ||||||
5050 | |||||||
5051 | S.Diag(DefaultInitLoc, diag::err_multiple_mem_union_initialization); | ||||||
5052 | S.Diag(findDefaultInitializer(Parent), diag::note_previous_initializer) << 0; | ||||||
5053 | } | ||||||
5054 | |||||||
5055 | static void checkDuplicateDefaultInit(Sema &S, CXXRecordDecl *Parent, | ||||||
5056 | CXXRecordDecl *AnonUnion) { | ||||||
5057 | if (!Parent->isUnion() || !Parent->hasInClassInitializer()) | ||||||
5058 | return; | ||||||
5059 | |||||||
5060 | checkDuplicateDefaultInit(S, Parent, findDefaultInitializer(AnonUnion)); | ||||||
5061 | } | ||||||
5062 | |||||||
5063 | /// BuildAnonymousStructOrUnion - Handle the declaration of an | ||||||
5064 | /// anonymous structure or union. Anonymous unions are a C++ feature | ||||||
5065 | /// (C++ [class.union]) and a C11 feature; anonymous structures | ||||||
5066 | /// are a C11 feature and GNU C++ extension. | ||||||
5067 | Decl *Sema::BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, | ||||||
5068 | AccessSpecifier AS, | ||||||
5069 | RecordDecl *Record, | ||||||
5070 | const PrintingPolicy &Policy) { | ||||||
5071 | DeclContext *Owner = Record->getDeclContext(); | ||||||
5072 | |||||||
5073 | // Diagnose whether this anonymous struct/union is an extension. | ||||||
5074 | if (Record->isUnion() && !getLangOpts().CPlusPlus && !getLangOpts().C11) | ||||||
5075 | Diag(Record->getLocation(), diag::ext_anonymous_union); | ||||||
5076 | else if (!Record->isUnion() && getLangOpts().CPlusPlus) | ||||||
5077 | Diag(Record->getLocation(), diag::ext_gnu_anonymous_struct); | ||||||
5078 | else if (!Record->isUnion() && !getLangOpts().C11) | ||||||
5079 | Diag(Record->getLocation(), diag::ext_c11_anonymous_struct); | ||||||
5080 | |||||||
5081 | // C and C++ require different kinds of checks for anonymous | ||||||
5082 | // structs/unions. | ||||||
5083 | bool Invalid = false; | ||||||
5084 | if (getLangOpts().CPlusPlus) { | ||||||
5085 | const char *PrevSpec = nullptr; | ||||||
5086 | if (Record->isUnion()) { | ||||||
5087 | // C++ [class.union]p6: | ||||||
5088 | // C++17 [class.union.anon]p2: | ||||||
5089 | // Anonymous unions declared in a named namespace or in the | ||||||
5090 | // global namespace shall be declared static. | ||||||
5091 | unsigned DiagID; | ||||||
5092 | DeclContext *OwnerScope = Owner->getRedeclContext(); | ||||||
5093 | if (DS.getStorageClassSpec() != DeclSpec::SCS_static && | ||||||
5094 | (OwnerScope->isTranslationUnit() || | ||||||
5095 | (OwnerScope->isNamespace() && | ||||||
5096 | !cast<NamespaceDecl>(OwnerScope)->isAnonymousNamespace()))) { | ||||||
5097 | Diag(Record->getLocation(), diag::err_anonymous_union_not_static) | ||||||
5098 | << FixItHint::CreateInsertion(Record->getLocation(), "static "); | ||||||
5099 | |||||||
5100 | // Recover by adding 'static'. | ||||||
5101 | DS.SetStorageClassSpec(*this, DeclSpec::SCS_static, SourceLocation(), | ||||||
5102 | PrevSpec, DiagID, Policy); | ||||||
5103 | } | ||||||
5104 | // C++ [class.union]p6: | ||||||
5105 | // A storage class is not allowed in a declaration of an | ||||||
5106 | // anonymous union in a class scope. | ||||||
5107 | else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified && | ||||||
5108 | isa<RecordDecl>(Owner)) { | ||||||
5109 | Diag(DS.getStorageClassSpecLoc(), | ||||||
5110 | diag::err_anonymous_union_with_storage_spec) | ||||||
5111 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
5112 | |||||||
5113 | // Recover by removing the storage specifier. | ||||||
5114 | DS.SetStorageClassSpec(*this, DeclSpec::SCS_unspecified, | ||||||
5115 | SourceLocation(), | ||||||
5116 | PrevSpec, DiagID, Context.getPrintingPolicy()); | ||||||
5117 | } | ||||||
5118 | } | ||||||
5119 | |||||||
5120 | // Ignore const/volatile/restrict qualifiers. | ||||||
5121 | if (DS.getTypeQualifiers()) { | ||||||
5122 | if (DS.getTypeQualifiers() & DeclSpec::TQ_const) | ||||||
5123 | Diag(DS.getConstSpecLoc(), diag::ext_anonymous_struct_union_qualified) | ||||||
5124 | << Record->isUnion() << "const" | ||||||
5125 | << FixItHint::CreateRemoval(DS.getConstSpecLoc()); | ||||||
5126 | if (DS.getTypeQualifiers() & DeclSpec::TQ_volatile) | ||||||
5127 | Diag(DS.getVolatileSpecLoc(), | ||||||
5128 | diag::ext_anonymous_struct_union_qualified) | ||||||
5129 | << Record->isUnion() << "volatile" | ||||||
5130 | << FixItHint::CreateRemoval(DS.getVolatileSpecLoc()); | ||||||
5131 | if (DS.getTypeQualifiers() & DeclSpec::TQ_restrict) | ||||||
5132 | Diag(DS.getRestrictSpecLoc(), | ||||||
5133 | diag::ext_anonymous_struct_union_qualified) | ||||||
5134 | << Record->isUnion() << "restrict" | ||||||
5135 | << FixItHint::CreateRemoval(DS.getRestrictSpecLoc()); | ||||||
5136 | if (DS.getTypeQualifiers() & DeclSpec::TQ_atomic) | ||||||
5137 | Diag(DS.getAtomicSpecLoc(), | ||||||
5138 | diag::ext_anonymous_struct_union_qualified) | ||||||
5139 | << Record->isUnion() << "_Atomic" | ||||||
5140 | << FixItHint::CreateRemoval(DS.getAtomicSpecLoc()); | ||||||
5141 | if (DS.getTypeQualifiers() & DeclSpec::TQ_unaligned) | ||||||
5142 | Diag(DS.getUnalignedSpecLoc(), | ||||||
5143 | diag::ext_anonymous_struct_union_qualified) | ||||||
5144 | << Record->isUnion() << "__unaligned" | ||||||
5145 | << FixItHint::CreateRemoval(DS.getUnalignedSpecLoc()); | ||||||
5146 | |||||||
5147 | DS.ClearTypeQualifiers(); | ||||||
5148 | } | ||||||
5149 | |||||||
5150 | // C++ [class.union]p2: | ||||||
5151 | // The member-specification of an anonymous union shall only | ||||||
5152 | // define non-static data members. [Note: nested types and | ||||||
5153 | // functions cannot be declared within an anonymous union. ] | ||||||
5154 | for (auto *Mem : Record->decls()) { | ||||||
5155 | // Ignore invalid declarations; we already diagnosed them. | ||||||
5156 | if (Mem->isInvalidDecl()) | ||||||
5157 | continue; | ||||||
5158 | |||||||
5159 | if (auto *FD = dyn_cast<FieldDecl>(Mem)) { | ||||||
5160 | // C++ [class.union]p3: | ||||||
5161 | // An anonymous union shall not have private or protected | ||||||
5162 | // members (clause 11). | ||||||
5163 | assert(FD->getAccess() != AS_none)(static_cast <bool> (FD->getAccess() != AS_none) ? void (0) : __assert_fail ("FD->getAccess() != AS_none", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5163, __extension__ __PRETTY_FUNCTION__)); | ||||||
5164 | if (FD->getAccess() != AS_public) { | ||||||
5165 | Diag(FD->getLocation(), diag::err_anonymous_record_nonpublic_member) | ||||||
5166 | << Record->isUnion() << (FD->getAccess() == AS_protected); | ||||||
5167 | Invalid = true; | ||||||
5168 | } | ||||||
5169 | |||||||
5170 | // C++ [class.union]p1 | ||||||
5171 | // An object of a class with a non-trivial constructor, a non-trivial | ||||||
5172 | // copy constructor, a non-trivial destructor, or a non-trivial copy | ||||||
5173 | // assignment operator cannot be a member of a union, nor can an | ||||||
5174 | // array of such objects. | ||||||
5175 | if (CheckNontrivialField(FD)) | ||||||
5176 | Invalid = true; | ||||||
5177 | } else if (Mem->isImplicit()) { | ||||||
5178 | // Any implicit members are fine. | ||||||
5179 | } else if (isa<TagDecl>(Mem) && Mem->getDeclContext() != Record) { | ||||||
5180 | // This is a type that showed up in an | ||||||
5181 | // elaborated-type-specifier inside the anonymous struct or | ||||||
5182 | // union, but which actually declares a type outside of the | ||||||
5183 | // anonymous struct or union. It's okay. | ||||||
5184 | } else if (auto *MemRecord = dyn_cast<RecordDecl>(Mem)) { | ||||||
5185 | if (!MemRecord->isAnonymousStructOrUnion() && | ||||||
5186 | MemRecord->getDeclName()) { | ||||||
5187 | // Visual C++ allows type definition in anonymous struct or union. | ||||||
5188 | if (getLangOpts().MicrosoftExt) | ||||||
5189 | Diag(MemRecord->getLocation(), diag::ext_anonymous_record_with_type) | ||||||
5190 | << Record->isUnion(); | ||||||
5191 | else { | ||||||
5192 | // This is a nested type declaration. | ||||||
5193 | Diag(MemRecord->getLocation(), diag::err_anonymous_record_with_type) | ||||||
5194 | << Record->isUnion(); | ||||||
5195 | Invalid = true; | ||||||
5196 | } | ||||||
5197 | } else { | ||||||
5198 | // This is an anonymous type definition within another anonymous type. | ||||||
5199 | // This is a popular extension, provided by Plan9, MSVC and GCC, but | ||||||
5200 | // not part of standard C++. | ||||||
5201 | Diag(MemRecord->getLocation(), | ||||||
5202 | diag::ext_anonymous_record_with_anonymous_type) | ||||||
5203 | << Record->isUnion(); | ||||||
5204 | } | ||||||
5205 | } else if (isa<AccessSpecDecl>(Mem)) { | ||||||
5206 | // Any access specifier is fine. | ||||||
5207 | } else if (isa<StaticAssertDecl>(Mem)) { | ||||||
5208 | // In C++1z, static_assert declarations are also fine. | ||||||
5209 | } else { | ||||||
5210 | // We have something that isn't a non-static data | ||||||
5211 | // member. Complain about it. | ||||||
5212 | unsigned DK = diag::err_anonymous_record_bad_member; | ||||||
5213 | if (isa<TypeDecl>(Mem)) | ||||||
5214 | DK = diag::err_anonymous_record_with_type; | ||||||
5215 | else if (isa<FunctionDecl>(Mem)) | ||||||
5216 | DK = diag::err_anonymous_record_with_function; | ||||||
5217 | else if (isa<VarDecl>(Mem)) | ||||||
5218 | DK = diag::err_anonymous_record_with_static; | ||||||
5219 | |||||||
5220 | // Visual C++ allows type definition in anonymous struct or union. | ||||||
5221 | if (getLangOpts().MicrosoftExt && | ||||||
5222 | DK == diag::err_anonymous_record_with_type) | ||||||
5223 | Diag(Mem->getLocation(), diag::ext_anonymous_record_with_type) | ||||||
5224 | << Record->isUnion(); | ||||||
5225 | else { | ||||||
5226 | Diag(Mem->getLocation(), DK) << Record->isUnion(); | ||||||
5227 | Invalid = true; | ||||||
5228 | } | ||||||
5229 | } | ||||||
5230 | } | ||||||
5231 | |||||||
5232 | // C++11 [class.union]p8 (DR1460): | ||||||
5233 | // At most one variant member of a union may have a | ||||||
5234 | // brace-or-equal-initializer. | ||||||
5235 | if (cast<CXXRecordDecl>(Record)->hasInClassInitializer() && | ||||||
5236 | Owner->isRecord()) | ||||||
5237 | checkDuplicateDefaultInit(*this, cast<CXXRecordDecl>(Owner), | ||||||
5238 | cast<CXXRecordDecl>(Record)); | ||||||
5239 | } | ||||||
5240 | |||||||
5241 | if (!Record->isUnion() && !Owner->isRecord()) { | ||||||
5242 | Diag(Record->getLocation(), diag::err_anonymous_struct_not_member) | ||||||
5243 | << getLangOpts().CPlusPlus; | ||||||
5244 | Invalid = true; | ||||||
5245 | } | ||||||
5246 | |||||||
5247 | // C++ [dcl.dcl]p3: | ||||||
5248 | // [If there are no declarators], and except for the declaration of an | ||||||
5249 | // unnamed bit-field, the decl-specifier-seq shall introduce one or more | ||||||
5250 | // names into the program | ||||||
5251 | // C++ [class.mem]p2: | ||||||
5252 | // each such member-declaration shall either declare at least one member | ||||||
5253 | // name of the class or declare at least one unnamed bit-field | ||||||
5254 | // | ||||||
5255 | // For C this is an error even for a named struct, and is diagnosed elsewhere. | ||||||
5256 | if (getLangOpts().CPlusPlus && Record->field_empty()) | ||||||
5257 | Diag(DS.getBeginLoc(), diag::ext_no_declarators) << DS.getSourceRange(); | ||||||
5258 | |||||||
5259 | // Mock up a declarator. | ||||||
5260 | Declarator Dc(DS, DeclaratorContext::Member); | ||||||
5261 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); | ||||||
5262 | assert(TInfo && "couldn't build declarator info for anonymous struct/union")(static_cast <bool> (TInfo && "couldn't build declarator info for anonymous struct/union" ) ? void (0) : __assert_fail ("TInfo && \"couldn't build declarator info for anonymous struct/union\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5262, __extension__ __PRETTY_FUNCTION__)); | ||||||
5263 | |||||||
5264 | // Create a declaration for this anonymous struct/union. | ||||||
5265 | NamedDecl *Anon = nullptr; | ||||||
5266 | if (RecordDecl *OwningClass = dyn_cast<RecordDecl>(Owner)) { | ||||||
5267 | Anon = FieldDecl::Create( | ||||||
5268 | Context, OwningClass, DS.getBeginLoc(), Record->getLocation(), | ||||||
5269 | /*IdentifierInfo=*/nullptr, Context.getTypeDeclType(Record), TInfo, | ||||||
5270 | /*BitWidth=*/nullptr, /*Mutable=*/false, | ||||||
5271 | /*InitStyle=*/ICIS_NoInit); | ||||||
5272 | Anon->setAccess(AS); | ||||||
5273 | ProcessDeclAttributes(S, Anon, Dc); | ||||||
5274 | |||||||
5275 | if (getLangOpts().CPlusPlus) | ||||||
5276 | FieldCollector->Add(cast<FieldDecl>(Anon)); | ||||||
5277 | } else { | ||||||
5278 | DeclSpec::SCS SCSpec = DS.getStorageClassSpec(); | ||||||
5279 | StorageClass SC = StorageClassSpecToVarDeclStorageClass(DS); | ||||||
5280 | if (SCSpec == DeclSpec::SCS_mutable) { | ||||||
5281 | // mutable can only appear on non-static class members, so it's always | ||||||
5282 | // an error here | ||||||
5283 | Diag(Record->getLocation(), diag::err_mutable_nonmember); | ||||||
5284 | Invalid = true; | ||||||
5285 | SC = SC_None; | ||||||
5286 | } | ||||||
5287 | |||||||
5288 | assert(DS.getAttributes().empty() && "No attribute expected")(static_cast <bool> (DS.getAttributes().empty() && "No attribute expected") ? void (0) : __assert_fail ("DS.getAttributes().empty() && \"No attribute expected\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5288, __extension__ __PRETTY_FUNCTION__)); | ||||||
5289 | Anon = VarDecl::Create(Context, Owner, DS.getBeginLoc(), | ||||||
5290 | Record->getLocation(), /*IdentifierInfo=*/nullptr, | ||||||
5291 | Context.getTypeDeclType(Record), TInfo, SC); | ||||||
5292 | |||||||
5293 | // Default-initialize the implicit variable. This initialization will be | ||||||
5294 | // trivial in almost all cases, except if a union member has an in-class | ||||||
5295 | // initializer: | ||||||
5296 | // union { int n = 0; }; | ||||||
5297 | if (!Invalid) | ||||||
5298 | ActOnUninitializedDecl(Anon); | ||||||
5299 | } | ||||||
5300 | Anon->setImplicit(); | ||||||
5301 | |||||||
5302 | // Mark this as an anonymous struct/union type. | ||||||
5303 | Record->setAnonymousStructOrUnion(true); | ||||||
5304 | |||||||
5305 | // Add the anonymous struct/union object to the current | ||||||
5306 | // context. We'll be referencing this object when we refer to one of | ||||||
5307 | // its members. | ||||||
5308 | Owner->addDecl(Anon); | ||||||
5309 | |||||||
5310 | // Inject the members of the anonymous struct/union into the owning | ||||||
5311 | // context and into the identifier resolver chain for name lookup | ||||||
5312 | // purposes. | ||||||
5313 | SmallVector<NamedDecl*, 2> Chain; | ||||||
5314 | Chain.push_back(Anon); | ||||||
5315 | |||||||
5316 | if (InjectAnonymousStructOrUnionMembers(*this, S, Owner, Record, AS, Chain)) | ||||||
5317 | Invalid = true; | ||||||
5318 | |||||||
5319 | if (VarDecl *NewVD = dyn_cast<VarDecl>(Anon)) { | ||||||
5320 | if (getLangOpts().CPlusPlus && NewVD->isStaticLocal()) { | ||||||
5321 | MangleNumberingContext *MCtx; | ||||||
5322 | Decl *ManglingContextDecl; | ||||||
5323 | std::tie(MCtx, ManglingContextDecl) = | ||||||
5324 | getCurrentMangleNumberContext(NewVD->getDeclContext()); | ||||||
5325 | if (MCtx) { | ||||||
5326 | Context.setManglingNumber( | ||||||
5327 | NewVD, MCtx->getManglingNumber( | ||||||
5328 | NewVD, getMSManglingNumber(getLangOpts(), S))); | ||||||
5329 | Context.setStaticLocalNumber(NewVD, MCtx->getStaticLocalNumber(NewVD)); | ||||||
5330 | } | ||||||
5331 | } | ||||||
5332 | } | ||||||
5333 | |||||||
5334 | if (Invalid) | ||||||
5335 | Anon->setInvalidDecl(); | ||||||
5336 | |||||||
5337 | return Anon; | ||||||
5338 | } | ||||||
5339 | |||||||
5340 | /// BuildMicrosoftCAnonymousStruct - Handle the declaration of an | ||||||
5341 | /// Microsoft C anonymous structure. | ||||||
5342 | /// Ref: http://msdn.microsoft.com/en-us/library/z2cx9y4f.aspx | ||||||
5343 | /// Example: | ||||||
5344 | /// | ||||||
5345 | /// struct A { int a; }; | ||||||
5346 | /// struct B { struct A; int b; }; | ||||||
5347 | /// | ||||||
5348 | /// void foo() { | ||||||
5349 | /// B var; | ||||||
5350 | /// var.a = 3; | ||||||
5351 | /// } | ||||||
5352 | /// | ||||||
5353 | Decl *Sema::BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, | ||||||
5354 | RecordDecl *Record) { | ||||||
5355 | assert(Record && "expected a record!")(static_cast <bool> (Record && "expected a record!" ) ? void (0) : __assert_fail ("Record && \"expected a record!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5355, __extension__ __PRETTY_FUNCTION__)); | ||||||
5356 | |||||||
5357 | // Mock up a declarator. | ||||||
5358 | Declarator Dc(DS, DeclaratorContext::TypeName); | ||||||
5359 | TypeSourceInfo *TInfo = GetTypeForDeclarator(Dc, S); | ||||||
5360 | assert(TInfo && "couldn't build declarator info for anonymous struct")(static_cast <bool> (TInfo && "couldn't build declarator info for anonymous struct" ) ? void (0) : __assert_fail ("TInfo && \"couldn't build declarator info for anonymous struct\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5360, __extension__ __PRETTY_FUNCTION__)); | ||||||
5361 | |||||||
5362 | auto *ParentDecl = cast<RecordDecl>(CurContext); | ||||||
5363 | QualType RecTy = Context.getTypeDeclType(Record); | ||||||
5364 | |||||||
5365 | // Create a declaration for this anonymous struct. | ||||||
5366 | NamedDecl *Anon = | ||||||
5367 | FieldDecl::Create(Context, ParentDecl, DS.getBeginLoc(), DS.getBeginLoc(), | ||||||
5368 | /*IdentifierInfo=*/nullptr, RecTy, TInfo, | ||||||
5369 | /*BitWidth=*/nullptr, /*Mutable=*/false, | ||||||
5370 | /*InitStyle=*/ICIS_NoInit); | ||||||
5371 | Anon->setImplicit(); | ||||||
5372 | |||||||
5373 | // Add the anonymous struct object to the current context. | ||||||
5374 | CurContext->addDecl(Anon); | ||||||
5375 | |||||||
5376 | // Inject the members of the anonymous struct into the current | ||||||
5377 | // context and into the identifier resolver chain for name lookup | ||||||
5378 | // purposes. | ||||||
5379 | SmallVector<NamedDecl*, 2> Chain; | ||||||
5380 | Chain.push_back(Anon); | ||||||
5381 | |||||||
5382 | RecordDecl *RecordDef = Record->getDefinition(); | ||||||
5383 | if (RequireCompleteSizedType(Anon->getLocation(), RecTy, | ||||||
5384 | diag::err_field_incomplete_or_sizeless) || | ||||||
5385 | InjectAnonymousStructOrUnionMembers(*this, S, CurContext, RecordDef, | ||||||
5386 | AS_none, Chain)) { | ||||||
5387 | Anon->setInvalidDecl(); | ||||||
5388 | ParentDecl->setInvalidDecl(); | ||||||
5389 | } | ||||||
5390 | |||||||
5391 | return Anon; | ||||||
5392 | } | ||||||
5393 | |||||||
5394 | /// GetNameForDeclarator - Determine the full declaration name for the | ||||||
5395 | /// given Declarator. | ||||||
5396 | DeclarationNameInfo Sema::GetNameForDeclarator(Declarator &D) { | ||||||
5397 | return GetNameFromUnqualifiedId(D.getName()); | ||||||
5398 | } | ||||||
5399 | |||||||
5400 | /// Retrieves the declaration name from a parsed unqualified-id. | ||||||
5401 | DeclarationNameInfo | ||||||
5402 | Sema::GetNameFromUnqualifiedId(const UnqualifiedId &Name) { | ||||||
5403 | DeclarationNameInfo NameInfo; | ||||||
5404 | NameInfo.setLoc(Name.StartLocation); | ||||||
5405 | |||||||
5406 | switch (Name.getKind()) { | ||||||
5407 | |||||||
5408 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||
5409 | case UnqualifiedIdKind::IK_Identifier: | ||||||
5410 | NameInfo.setName(Name.Identifier); | ||||||
5411 | return NameInfo; | ||||||
5412 | |||||||
5413 | case UnqualifiedIdKind::IK_DeductionGuideName: { | ||||||
5414 | // C++ [temp.deduct.guide]p3: | ||||||
5415 | // The simple-template-id shall name a class template specialization. | ||||||
5416 | // The template-name shall be the same identifier as the template-name | ||||||
5417 | // of the simple-template-id. | ||||||
5418 | // These together intend to imply that the template-name shall name a | ||||||
5419 | // class template. | ||||||
5420 | // FIXME: template<typename T> struct X {}; | ||||||
5421 | // template<typename T> using Y = X<T>; | ||||||
5422 | // Y(int) -> Y<int>; | ||||||
5423 | // satisfies these rules but does not name a class template. | ||||||
5424 | TemplateName TN = Name.TemplateName.get().get(); | ||||||
5425 | auto *Template = TN.getAsTemplateDecl(); | ||||||
5426 | if (!Template || !isa<ClassTemplateDecl>(Template)) { | ||||||
5427 | Diag(Name.StartLocation, | ||||||
5428 | diag::err_deduction_guide_name_not_class_template) | ||||||
5429 | << (int)getTemplateNameKindForDiagnostics(TN) << TN; | ||||||
5430 | if (Template) | ||||||
5431 | Diag(Template->getLocation(), diag::note_template_decl_here); | ||||||
5432 | return DeclarationNameInfo(); | ||||||
5433 | } | ||||||
5434 | |||||||
5435 | NameInfo.setName( | ||||||
5436 | Context.DeclarationNames.getCXXDeductionGuideName(Template)); | ||||||
5437 | return NameInfo; | ||||||
5438 | } | ||||||
5439 | |||||||
5440 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||
5441 | NameInfo.setName(Context.DeclarationNames.getCXXOperatorName( | ||||||
5442 | Name.OperatorFunctionId.Operator)); | ||||||
5443 | NameInfo.setCXXOperatorNameRange(SourceRange( | ||||||
5444 | Name.OperatorFunctionId.SymbolLocations[0], Name.EndLocation)); | ||||||
5445 | return NameInfo; | ||||||
5446 | |||||||
5447 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||
5448 | NameInfo.setName(Context.DeclarationNames.getCXXLiteralOperatorName( | ||||||
5449 | Name.Identifier)); | ||||||
5450 | NameInfo.setCXXLiteralOperatorNameLoc(Name.EndLocation); | ||||||
5451 | return NameInfo; | ||||||
5452 | |||||||
5453 | case UnqualifiedIdKind::IK_ConversionFunctionId: { | ||||||
5454 | TypeSourceInfo *TInfo; | ||||||
5455 | QualType Ty = GetTypeFromParser(Name.ConversionFunctionId, &TInfo); | ||||||
5456 | if (Ty.isNull()) | ||||||
5457 | return DeclarationNameInfo(); | ||||||
5458 | NameInfo.setName(Context.DeclarationNames.getCXXConversionFunctionName( | ||||||
5459 | Context.getCanonicalType(Ty))); | ||||||
5460 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5461 | return NameInfo; | ||||||
5462 | } | ||||||
5463 | |||||||
5464 | case UnqualifiedIdKind::IK_ConstructorName: { | ||||||
5465 | TypeSourceInfo *TInfo; | ||||||
5466 | QualType Ty = GetTypeFromParser(Name.ConstructorName, &TInfo); | ||||||
5467 | if (Ty.isNull()) | ||||||
5468 | return DeclarationNameInfo(); | ||||||
5469 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||
5470 | Context.getCanonicalType(Ty))); | ||||||
5471 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5472 | return NameInfo; | ||||||
5473 | } | ||||||
5474 | |||||||
5475 | case UnqualifiedIdKind::IK_ConstructorTemplateId: { | ||||||
5476 | // In well-formed code, we can only have a constructor | ||||||
5477 | // template-id that refers to the current context, so go there | ||||||
5478 | // to find the actual type being constructed. | ||||||
5479 | CXXRecordDecl *CurClass = dyn_cast<CXXRecordDecl>(CurContext); | ||||||
5480 | if (!CurClass || CurClass->getIdentifier() != Name.TemplateId->Name) | ||||||
5481 | return DeclarationNameInfo(); | ||||||
5482 | |||||||
5483 | // Determine the type of the class being constructed. | ||||||
5484 | QualType CurClassType = Context.getTypeDeclType(CurClass); | ||||||
5485 | |||||||
5486 | // FIXME: Check two things: that the template-id names the same type as | ||||||
5487 | // CurClassType, and that the template-id does not occur when the name | ||||||
5488 | // was qualified. | ||||||
5489 | |||||||
5490 | NameInfo.setName(Context.DeclarationNames.getCXXConstructorName( | ||||||
5491 | Context.getCanonicalType(CurClassType))); | ||||||
5492 | // FIXME: should we retrieve TypeSourceInfo? | ||||||
5493 | NameInfo.setNamedTypeInfo(nullptr); | ||||||
5494 | return NameInfo; | ||||||
5495 | } | ||||||
5496 | |||||||
5497 | case UnqualifiedIdKind::IK_DestructorName: { | ||||||
5498 | TypeSourceInfo *TInfo; | ||||||
5499 | QualType Ty = GetTypeFromParser(Name.DestructorName, &TInfo); | ||||||
5500 | if (Ty.isNull()) | ||||||
5501 | return DeclarationNameInfo(); | ||||||
5502 | NameInfo.setName(Context.DeclarationNames.getCXXDestructorName( | ||||||
5503 | Context.getCanonicalType(Ty))); | ||||||
5504 | NameInfo.setNamedTypeInfo(TInfo); | ||||||
5505 | return NameInfo; | ||||||
5506 | } | ||||||
5507 | |||||||
5508 | case UnqualifiedIdKind::IK_TemplateId: { | ||||||
5509 | TemplateName TName = Name.TemplateId->Template.get(); | ||||||
5510 | SourceLocation TNameLoc = Name.TemplateId->TemplateNameLoc; | ||||||
5511 | return Context.getNameForTemplate(TName, TNameLoc); | ||||||
5512 | } | ||||||
5513 | |||||||
5514 | } // switch (Name.getKind()) | ||||||
5515 | |||||||
5516 | llvm_unreachable("Unknown name kind")::llvm::llvm_unreachable_internal("Unknown name kind", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 5516); | ||||||
5517 | } | ||||||
5518 | |||||||
5519 | static QualType getCoreType(QualType Ty) { | ||||||
5520 | do { | ||||||
5521 | if (Ty->isPointerType() || Ty->isReferenceType()) | ||||||
5522 | Ty = Ty->getPointeeType(); | ||||||
5523 | else if (Ty->isArrayType()) | ||||||
5524 | Ty = Ty->castAsArrayTypeUnsafe()->getElementType(); | ||||||
5525 | else | ||||||
5526 | return Ty.withoutLocalFastQualifiers(); | ||||||
5527 | } while (true); | ||||||
5528 | } | ||||||
5529 | |||||||
5530 | /// hasSimilarParameters - Determine whether the C++ functions Declaration | ||||||
5531 | /// and Definition have "nearly" matching parameters. This heuristic is | ||||||
5532 | /// used to improve diagnostics in the case where an out-of-line function | ||||||
5533 | /// definition doesn't match any declaration within the class or namespace. | ||||||
5534 | /// Also sets Params to the list of indices to the parameters that differ | ||||||
5535 | /// between the declaration and the definition. If hasSimilarParameters | ||||||
5536 | /// returns true and Params is empty, then all of the parameters match. | ||||||
5537 | static bool hasSimilarParameters(ASTContext &Context, | ||||||
5538 | FunctionDecl *Declaration, | ||||||
5539 | FunctionDecl *Definition, | ||||||
5540 | SmallVectorImpl<unsigned> &Params) { | ||||||
5541 | Params.clear(); | ||||||
5542 | if (Declaration->param_size() != Definition->param_size()) | ||||||
5543 | return false; | ||||||
5544 | for (unsigned Idx = 0; Idx < Declaration->param_size(); ++Idx) { | ||||||
5545 | QualType DeclParamTy = Declaration->getParamDecl(Idx)->getType(); | ||||||
5546 | QualType DefParamTy = Definition->getParamDecl(Idx)->getType(); | ||||||
5547 | |||||||
5548 | // The parameter types are identical | ||||||
5549 | if (Context.hasSameUnqualifiedType(DefParamTy, DeclParamTy)) | ||||||
5550 | continue; | ||||||
5551 | |||||||
5552 | QualType DeclParamBaseTy = getCoreType(DeclParamTy); | ||||||
5553 | QualType DefParamBaseTy = getCoreType(DefParamTy); | ||||||
5554 | const IdentifierInfo *DeclTyName = DeclParamBaseTy.getBaseTypeIdentifier(); | ||||||
5555 | const IdentifierInfo *DefTyName = DefParamBaseTy.getBaseTypeIdentifier(); | ||||||
5556 | |||||||
5557 | if (Context.hasSameUnqualifiedType(DeclParamBaseTy, DefParamBaseTy) || | ||||||
5558 | (DeclTyName && DeclTyName == DefTyName)) | ||||||
5559 | Params.push_back(Idx); | ||||||
5560 | else // The two parameters aren't even close | ||||||
5561 | return false; | ||||||
5562 | } | ||||||
5563 | |||||||
5564 | return true; | ||||||
5565 | } | ||||||
5566 | |||||||
5567 | /// NeedsRebuildingInCurrentInstantiation - Checks whether the given | ||||||
5568 | /// declarator needs to be rebuilt in the current instantiation. | ||||||
5569 | /// Any bits of declarator which appear before the name are valid for | ||||||
5570 | /// consideration here. That's specifically the type in the decl spec | ||||||
5571 | /// and the base type in any member-pointer chunks. | ||||||
5572 | static bool RebuildDeclaratorInCurrentInstantiation(Sema &S, Declarator &D, | ||||||
5573 | DeclarationName Name) { | ||||||
5574 | // The types we specifically need to rebuild are: | ||||||
5575 | // - typenames, typeofs, and decltypes | ||||||
5576 | // - types which will become injected class names | ||||||
5577 | // Of course, we also need to rebuild any type referencing such a | ||||||
5578 | // type. It's safest to just say "dependent", but we call out a | ||||||
5579 | // few cases here. | ||||||
5580 | |||||||
5581 | DeclSpec &DS = D.getMutableDeclSpec(); | ||||||
5582 | switch (DS.getTypeSpecType()) { | ||||||
5583 | case DeclSpec::TST_typename: | ||||||
5584 | case DeclSpec::TST_typeofType: | ||||||
5585 | case DeclSpec::TST_underlyingType: | ||||||
5586 | case DeclSpec::TST_atomic: { | ||||||
5587 | // Grab the type from the parser. | ||||||
5588 | TypeSourceInfo *TSI = nullptr; | ||||||
5589 | QualType T = S.GetTypeFromParser(DS.getRepAsType(), &TSI); | ||||||
5590 | if (T.isNull() || !T->isInstantiationDependentType()) break; | ||||||
5591 | |||||||
5592 | // Make sure there's a type source info. This isn't really much | ||||||
5593 | // of a waste; most dependent types should have type source info | ||||||
5594 | // attached already. | ||||||
5595 | if (!TSI) | ||||||
5596 | TSI = S.Context.getTrivialTypeSourceInfo(T, DS.getTypeSpecTypeLoc()); | ||||||
5597 | |||||||
5598 | // Rebuild the type in the current instantiation. | ||||||
5599 | TSI = S.RebuildTypeInCurrentInstantiation(TSI, D.getIdentifierLoc(), Name); | ||||||
5600 | if (!TSI) return true; | ||||||
5601 | |||||||
5602 | // Store the new type back in the decl spec. | ||||||
5603 | ParsedType LocType = S.CreateParsedType(TSI->getType(), TSI); | ||||||
5604 | DS.UpdateTypeRep(LocType); | ||||||
5605 | break; | ||||||
5606 | } | ||||||
5607 | |||||||
5608 | case DeclSpec::TST_decltype: | ||||||
5609 | case DeclSpec::TST_typeofExpr: { | ||||||
5610 | Expr *E = DS.getRepAsExpr(); | ||||||
5611 | ExprResult Result = S.RebuildExprInCurrentInstantiation(E); | ||||||
5612 | if (Result.isInvalid()) return true; | ||||||
5613 | DS.UpdateExprRep(Result.get()); | ||||||
5614 | break; | ||||||
5615 | } | ||||||
5616 | |||||||
5617 | default: | ||||||
5618 | // Nothing to do for these decl specs. | ||||||
5619 | break; | ||||||
5620 | } | ||||||
5621 | |||||||
5622 | // It doesn't matter what order we do this in. | ||||||
5623 | for (unsigned I = 0, E = D.getNumTypeObjects(); I != E; ++I) { | ||||||
5624 | DeclaratorChunk &Chunk = D.getTypeObject(I); | ||||||
5625 | |||||||
5626 | // The only type information in the declarator which can come | ||||||
5627 | // before the declaration name is the base type of a member | ||||||
5628 | // pointer. | ||||||
5629 | if (Chunk.Kind != DeclaratorChunk::MemberPointer) | ||||||
5630 | continue; | ||||||
5631 | |||||||
5632 | // Rebuild the scope specifier in-place. | ||||||
5633 | CXXScopeSpec &SS = Chunk.Mem.Scope(); | ||||||
5634 | if (S.RebuildNestedNameSpecifierInCurrentInstantiation(SS)) | ||||||
5635 | return true; | ||||||
5636 | } | ||||||
5637 | |||||||
5638 | return false; | ||||||
5639 | } | ||||||
5640 | |||||||
5641 | void Sema::warnOnReservedIdentifier(const NamedDecl *D) { | ||||||
5642 | // Avoid warning twice on the same identifier, and don't warn on redeclaration | ||||||
5643 | // of system decl. | ||||||
5644 | if (D->getPreviousDecl() || D->isImplicit()) | ||||||
5645 | return; | ||||||
5646 | ReservedIdentifierStatus Status = D->isReserved(getLangOpts()); | ||||||
5647 | if (Status != ReservedIdentifierStatus::NotReserved && | ||||||
5648 | !Context.getSourceManager().isInSystemHeader(D->getLocation())) | ||||||
5649 | Diag(D->getLocation(), diag::warn_reserved_extern_symbol) | ||||||
5650 | << D << static_cast<int>(Status); | ||||||
5651 | } | ||||||
5652 | |||||||
5653 | Decl *Sema::ActOnDeclarator(Scope *S, Declarator &D) { | ||||||
5654 | D.setFunctionDefinitionKind(FunctionDefinitionKind::Declaration); | ||||||
5655 | Decl *Dcl = HandleDeclarator(S, D, MultiTemplateParamsArg()); | ||||||
5656 | |||||||
5657 | if (OriginalLexicalContext && OriginalLexicalContext->isObjCContainer() && | ||||||
5658 | Dcl && Dcl->getDeclContext()->isFileContext()) | ||||||
5659 | Dcl->setTopLevelDeclInObjCContainer(); | ||||||
5660 | |||||||
5661 | return Dcl; | ||||||
5662 | } | ||||||
5663 | |||||||
5664 | /// DiagnoseClassNameShadow - Implement C++ [class.mem]p13: | ||||||
5665 | /// If T is the name of a class, then each of the following shall have a | ||||||
5666 | /// name different from T: | ||||||
5667 | /// - every static data member of class T; | ||||||
5668 | /// - every member function of class T | ||||||
5669 | /// - every member of class T that is itself a type; | ||||||
5670 | /// \returns true if the declaration name violates these rules. | ||||||
5671 | bool Sema::DiagnoseClassNameShadow(DeclContext *DC, | ||||||
5672 | DeclarationNameInfo NameInfo) { | ||||||
5673 | DeclarationName Name = NameInfo.getName(); | ||||||
5674 | |||||||
5675 | CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(DC); | ||||||
5676 | while (Record && Record->isAnonymousStructOrUnion()) | ||||||
5677 | Record = dyn_cast<CXXRecordDecl>(Record->getParent()); | ||||||
5678 | if (Record && Record->getIdentifier() && Record->getDeclName() == Name) { | ||||||
5679 | Diag(NameInfo.getLoc(), diag::err_member_name_of_class) << Name; | ||||||
5680 | return true; | ||||||
5681 | } | ||||||
5682 | |||||||
5683 | return false; | ||||||
5684 | } | ||||||
5685 | |||||||
5686 | /// Diagnose a declaration whose declarator-id has the given | ||||||
5687 | /// nested-name-specifier. | ||||||
5688 | /// | ||||||
5689 | /// \param SS The nested-name-specifier of the declarator-id. | ||||||
5690 | /// | ||||||
5691 | /// \param DC The declaration context to which the nested-name-specifier | ||||||
5692 | /// resolves. | ||||||
5693 | /// | ||||||
5694 | /// \param Name The name of the entity being declared. | ||||||
5695 | /// | ||||||
5696 | /// \param Loc The location of the name of the entity being declared. | ||||||
5697 | /// | ||||||
5698 | /// \param IsTemplateId Whether the name is a (simple-)template-id, and thus | ||||||
5699 | /// we're declaring an explicit / partial specialization / instantiation. | ||||||
5700 | /// | ||||||
5701 | /// \returns true if we cannot safely recover from this error, false otherwise. | ||||||
5702 | bool Sema::diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC, | ||||||
5703 | DeclarationName Name, | ||||||
5704 | SourceLocation Loc, bool IsTemplateId) { | ||||||
5705 | DeclContext *Cur = CurContext; | ||||||
5706 | while (isa<LinkageSpecDecl>(Cur) || isa<CapturedDecl>(Cur)) | ||||||
5707 | Cur = Cur->getParent(); | ||||||
5708 | |||||||
5709 | // If the user provided a superfluous scope specifier that refers back to the | ||||||
5710 | // class in which the entity is already declared, diagnose and ignore it. | ||||||
5711 | // | ||||||
5712 | // class X { | ||||||
5713 | // void X::f(); | ||||||
5714 | // }; | ||||||
5715 | // | ||||||
5716 | // Note, it was once ill-formed to give redundant qualification in all | ||||||
5717 | // contexts, but that rule was removed by DR482. | ||||||
5718 | if (Cur->Equals(DC)) { | ||||||
5719 | if (Cur->isRecord()) { | ||||||
5720 | Diag(Loc, LangOpts.MicrosoftExt ? diag::warn_member_extra_qualification | ||||||
5721 | : diag::err_member_extra_qualification) | ||||||
5722 | << Name << FixItHint::CreateRemoval(SS.getRange()); | ||||||
5723 | SS.clear(); | ||||||
5724 | } else { | ||||||
5725 | Diag(Loc, diag::warn_namespace_member_extra_qualification) << Name; | ||||||
5726 | } | ||||||
5727 | return false; | ||||||
5728 | } | ||||||
5729 | |||||||
5730 | // Check whether the qualifying scope encloses the scope of the original | ||||||
5731 | // declaration. For a template-id, we perform the checks in | ||||||
5732 | // CheckTemplateSpecializationScope. | ||||||
5733 | if (!Cur->Encloses(DC) && !IsTemplateId) { | ||||||
5734 | if (Cur->isRecord()) | ||||||
5735 | Diag(Loc, diag::err_member_qualification) | ||||||
5736 | << Name << SS.getRange(); | ||||||
5737 | else if (isa<TranslationUnitDecl>(DC)) | ||||||
5738 | Diag(Loc, diag::err_invalid_declarator_global_scope) | ||||||
5739 | << Name << SS.getRange(); | ||||||
5740 | else if (isa<FunctionDecl>(Cur)) | ||||||
5741 | Diag(Loc, diag::err_invalid_declarator_in_function) | ||||||
5742 | << Name << SS.getRange(); | ||||||
5743 | else if (isa<BlockDecl>(Cur)) | ||||||
5744 | Diag(Loc, diag::err_invalid_declarator_in_block) | ||||||
5745 | << Name << SS.getRange(); | ||||||
5746 | else | ||||||
5747 | Diag(Loc, diag::err_invalid_declarator_scope) | ||||||
5748 | << Name << cast<NamedDecl>(Cur) << cast<NamedDecl>(DC) << SS.getRange(); | ||||||
5749 | |||||||
5750 | return true; | ||||||
5751 | } | ||||||
5752 | |||||||
5753 | if (Cur->isRecord()) { | ||||||
5754 | // Cannot qualify members within a class. | ||||||
5755 | Diag(Loc, diag::err_member_qualification) | ||||||
5756 | << Name << SS.getRange(); | ||||||
5757 | SS.clear(); | ||||||
5758 | |||||||
5759 | // C++ constructors and destructors with incorrect scopes can break | ||||||
5760 | // our AST invariants by having the wrong underlying types. If | ||||||
5761 | // that's the case, then drop this declaration entirely. | ||||||
5762 | if ((Name.getNameKind() == DeclarationName::CXXConstructorName || | ||||||
5763 | Name.getNameKind() == DeclarationName::CXXDestructorName) && | ||||||
5764 | !Context.hasSameType(Name.getCXXNameType(), | ||||||
5765 | Context.getTypeDeclType(cast<CXXRecordDecl>(Cur)))) | ||||||
5766 | return true; | ||||||
5767 | |||||||
5768 | return false; | ||||||
5769 | } | ||||||
5770 | |||||||
5771 | // C++11 [dcl.meaning]p1: | ||||||
5772 | // [...] "The nested-name-specifier of the qualified declarator-id shall | ||||||
5773 | // not begin with a decltype-specifer" | ||||||
5774 | NestedNameSpecifierLoc SpecLoc(SS.getScopeRep(), SS.location_data()); | ||||||
5775 | while (SpecLoc.getPrefix()) | ||||||
5776 | SpecLoc = SpecLoc.getPrefix(); | ||||||
5777 | if (dyn_cast_or_null<DecltypeType>( | ||||||
5778 | SpecLoc.getNestedNameSpecifier()->getAsType())) | ||||||
5779 | Diag(Loc, diag::err_decltype_in_declarator) | ||||||
5780 | << SpecLoc.getTypeLoc().getSourceRange(); | ||||||
5781 | |||||||
5782 | return false; | ||||||
5783 | } | ||||||
5784 | |||||||
5785 | NamedDecl *Sema::HandleDeclarator(Scope *S, Declarator &D, | ||||||
5786 | MultiTemplateParamsArg TemplateParamLists) { | ||||||
5787 | // TODO: consider using NameInfo for diagnostic. | ||||||
5788 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||
5789 | DeclarationName Name = NameInfo.getName(); | ||||||
5790 | |||||||
5791 | // All of these full declarators require an identifier. If it doesn't have | ||||||
5792 | // one, the ParsedFreeStandingDeclSpec action should be used. | ||||||
5793 | if (D.isDecompositionDeclarator()) { | ||||||
5794 | return ActOnDecompositionDeclarator(S, D, TemplateParamLists); | ||||||
5795 | } else if (!Name) { | ||||||
5796 | if (!D.isInvalidType()) // Reject this if we think it is valid. | ||||||
5797 | Diag(D.getDeclSpec().getBeginLoc(), diag::err_declarator_need_ident) | ||||||
5798 | << D.getDeclSpec().getSourceRange() << D.getSourceRange(); | ||||||
5799 | return nullptr; | ||||||
5800 | } else if (DiagnoseUnexpandedParameterPack(NameInfo, UPPC_DeclarationType)) | ||||||
5801 | return nullptr; | ||||||
5802 | |||||||
5803 | // The scope passed in may not be a decl scope. Zip up the scope tree until | ||||||
5804 | // we find one that is. | ||||||
5805 | while ((S->getFlags() & Scope::DeclScope) == 0 || | ||||||
5806 | (S->getFlags() & Scope::TemplateParamScope) != 0) | ||||||
5807 | S = S->getParent(); | ||||||
5808 | |||||||
5809 | DeclContext *DC = CurContext; | ||||||
5810 | if (D.getCXXScopeSpec().isInvalid()) | ||||||
5811 | D.setInvalidType(); | ||||||
5812 | else if (D.getCXXScopeSpec().isSet()) { | ||||||
5813 | if (DiagnoseUnexpandedParameterPack(D.getCXXScopeSpec(), | ||||||
5814 | UPPC_DeclarationQualifier)) | ||||||
5815 | return nullptr; | ||||||
5816 | |||||||
5817 | bool EnteringContext = !D.getDeclSpec().isFriendSpecified(); | ||||||
5818 | DC = computeDeclContext(D.getCXXScopeSpec(), EnteringContext); | ||||||
5819 | if (!DC || isa<EnumDecl>(DC)) { | ||||||
5820 | // If we could not compute the declaration context, it's because the | ||||||
5821 | // declaration context is dependent but does not refer to a class, | ||||||
5822 | // class template, or class template partial specialization. Complain | ||||||
5823 | // and return early, to avoid the coming semantic disaster. | ||||||
5824 | Diag(D.getIdentifierLoc(), | ||||||
5825 | diag::err_template_qualified_declarator_no_match) | ||||||
5826 | << D.getCXXScopeSpec().getScopeRep() | ||||||
5827 | << D.getCXXScopeSpec().getRange(); | ||||||
5828 | return nullptr; | ||||||
5829 | } | ||||||
5830 | bool IsDependentContext = DC->isDependentContext(); | ||||||
5831 | |||||||
5832 | if (!IsDependentContext && | ||||||
5833 | RequireCompleteDeclContext(D.getCXXScopeSpec(), DC)) | ||||||
5834 | return nullptr; | ||||||
5835 | |||||||
5836 | // If a class is incomplete, do not parse entities inside it. | ||||||
5837 | if (isa<CXXRecordDecl>(DC) && !cast<CXXRecordDecl>(DC)->hasDefinition()) { | ||||||
5838 | Diag(D.getIdentifierLoc(), | ||||||
5839 | diag::err_member_def_undefined_record) | ||||||
5840 | << Name << DC << D.getCXXScopeSpec().getRange(); | ||||||
5841 | return nullptr; | ||||||
5842 | } | ||||||
5843 | if (!D.getDeclSpec().isFriendSpecified()) { | ||||||
5844 | if (diagnoseQualifiedDeclaration( | ||||||
5845 | D.getCXXScopeSpec(), DC, Name, D.getIdentifierLoc(), | ||||||
5846 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId)) { | ||||||
5847 | if (DC->isRecord()) | ||||||
5848 | return nullptr; | ||||||
5849 | |||||||
5850 | D.setInvalidType(); | ||||||
5851 | } | ||||||
5852 | } | ||||||
5853 | |||||||
5854 | // Check whether we need to rebuild the type of the given | ||||||
5855 | // declaration in the current instantiation. | ||||||
5856 | if (EnteringContext && IsDependentContext && | ||||||
5857 | TemplateParamLists.size() != 0) { | ||||||
5858 | ContextRAII SavedContext(*this, DC); | ||||||
5859 | if (RebuildDeclaratorInCurrentInstantiation(*this, D, Name)) | ||||||
5860 | D.setInvalidType(); | ||||||
5861 | } | ||||||
5862 | } | ||||||
5863 | |||||||
5864 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
5865 | QualType R = TInfo->getType(); | ||||||
5866 | |||||||
5867 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
5868 | UPPC_DeclarationType)) | ||||||
5869 | D.setInvalidType(); | ||||||
5870 | |||||||
5871 | LookupResult Previous(*this, NameInfo, LookupOrdinaryName, | ||||||
5872 | forRedeclarationInCurContext()); | ||||||
5873 | |||||||
5874 | // See if this is a redefinition of a variable in the same scope. | ||||||
5875 | if (!D.getCXXScopeSpec().isSet()) { | ||||||
5876 | bool IsLinkageLookup = false; | ||||||
5877 | bool CreateBuiltins = false; | ||||||
5878 | |||||||
5879 | // If the declaration we're planning to build will be a function | ||||||
5880 | // or object with linkage, then look for another declaration with | ||||||
5881 | // linkage (C99 6.2.2p4-5 and C++ [basic.link]p6). | ||||||
5882 | // | ||||||
5883 | // If the declaration we're planning to build will be declared with | ||||||
5884 | // external linkage in the translation unit, create any builtin with | ||||||
5885 | // the same name. | ||||||
5886 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) | ||||||
5887 | /* Do nothing*/; | ||||||
5888 | else if (CurContext->isFunctionOrMethod() && | ||||||
5889 | (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern || | ||||||
5890 | R->isFunctionType())) { | ||||||
5891 | IsLinkageLookup = true; | ||||||
5892 | CreateBuiltins = | ||||||
5893 | CurContext->getEnclosingNamespaceContext()->isTranslationUnit(); | ||||||
5894 | } else if (CurContext->getRedeclContext()->isTranslationUnit() && | ||||||
5895 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static) | ||||||
5896 | CreateBuiltins = true; | ||||||
5897 | |||||||
5898 | if (IsLinkageLookup) { | ||||||
5899 | Previous.clear(LookupRedeclarationWithLinkage); | ||||||
5900 | Previous.setRedeclarationKind(ForExternalRedeclaration); | ||||||
5901 | } | ||||||
5902 | |||||||
5903 | LookupName(Previous, S, CreateBuiltins); | ||||||
5904 | } else { // Something like "int foo::x;" | ||||||
5905 | LookupQualifiedName(Previous, DC); | ||||||
5906 | |||||||
5907 | // C++ [dcl.meaning]p1: | ||||||
5908 | // When the declarator-id is qualified, the declaration shall refer to a | ||||||
5909 | // previously declared member of the class or namespace to which the | ||||||
5910 | // qualifier refers (or, in the case of a namespace, of an element of the | ||||||
5911 | // inline namespace set of that namespace (7.3.1)) or to a specialization | ||||||
5912 | // thereof; [...] | ||||||
5913 | // | ||||||
5914 | // Note that we already checked the context above, and that we do not have | ||||||
5915 | // enough information to make sure that Previous contains the declaration | ||||||
5916 | // we want to match. For example, given: | ||||||
5917 | // | ||||||
5918 | // class X { | ||||||
5919 | // void f(); | ||||||
5920 | // void f(float); | ||||||
5921 | // }; | ||||||
5922 | // | ||||||
5923 | // void X::f(int) { } // ill-formed | ||||||
5924 | // | ||||||
5925 | // In this case, Previous will point to the overload set | ||||||
5926 | // containing the two f's declared in X, but neither of them | ||||||
5927 | // matches. | ||||||
5928 | |||||||
5929 | // C++ [dcl.meaning]p1: | ||||||
5930 | // [...] the member shall not merely have been introduced by a | ||||||
5931 | // using-declaration in the scope of the class or namespace nominated by | ||||||
5932 | // the nested-name-specifier of the declarator-id. | ||||||
5933 | RemoveUsingDecls(Previous); | ||||||
5934 | } | ||||||
5935 | |||||||
5936 | if (Previous.isSingleResult() && | ||||||
5937 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||
5938 | // Maybe we will complain about the shadowed template parameter. | ||||||
5939 | if (!D.isInvalidType()) | ||||||
5940 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), | ||||||
5941 | Previous.getFoundDecl()); | ||||||
5942 | |||||||
5943 | // Just pretend that we didn't see the previous declaration. | ||||||
5944 | Previous.clear(); | ||||||
5945 | } | ||||||
5946 | |||||||
5947 | if (!R->isFunctionType() && DiagnoseClassNameShadow(DC, NameInfo)) | ||||||
5948 | // Forget that the previous declaration is the injected-class-name. | ||||||
5949 | Previous.clear(); | ||||||
5950 | |||||||
5951 | // In C++, the previous declaration we find might be a tag type | ||||||
5952 | // (class or enum). In this case, the new declaration will hide the | ||||||
5953 | // tag type. Note that this applies to functions, function templates, and | ||||||
5954 | // variables, but not to typedefs (C++ [dcl.typedef]p4) or variable templates. | ||||||
5955 | if (Previous.isSingleTagDecl() && | ||||||
5956 | D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_typedef && | ||||||
5957 | (TemplateParamLists.size() == 0 || R->isFunctionType())) | ||||||
5958 | Previous.clear(); | ||||||
5959 | |||||||
5960 | // Check that there are no default arguments other than in the parameters | ||||||
5961 | // of a function declaration (C++ only). | ||||||
5962 | if (getLangOpts().CPlusPlus) | ||||||
5963 | CheckExtraCXXDefaultArguments(D); | ||||||
5964 | |||||||
5965 | NamedDecl *New; | ||||||
5966 | |||||||
5967 | bool AddToScope = true; | ||||||
5968 | if (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) { | ||||||
5969 | if (TemplateParamLists.size()) { | ||||||
5970 | Diag(D.getIdentifierLoc(), diag::err_template_typedef); | ||||||
5971 | return nullptr; | ||||||
5972 | } | ||||||
5973 | |||||||
5974 | New = ActOnTypedefDeclarator(S, D, DC, TInfo, Previous); | ||||||
5975 | } else if (R->isFunctionType()) { | ||||||
5976 | New = ActOnFunctionDeclarator(S, D, DC, TInfo, Previous, | ||||||
5977 | TemplateParamLists, | ||||||
5978 | AddToScope); | ||||||
5979 | } else { | ||||||
5980 | New = ActOnVariableDeclarator(S, D, DC, TInfo, Previous, TemplateParamLists, | ||||||
5981 | AddToScope); | ||||||
5982 | } | ||||||
5983 | |||||||
5984 | if (!New) | ||||||
5985 | return nullptr; | ||||||
5986 | |||||||
5987 | // If this has an identifier and is not a function template specialization, | ||||||
5988 | // add it to the scope stack. | ||||||
5989 | if (New->getDeclName() && AddToScope) | ||||||
5990 | PushOnScopeChains(New, S); | ||||||
5991 | |||||||
5992 | if (isInOpenMPDeclareTargetContext()) | ||||||
5993 | checkDeclIsAllowedInOpenMPTarget(nullptr, New); | ||||||
5994 | |||||||
5995 | return New; | ||||||
5996 | } | ||||||
5997 | |||||||
5998 | /// Helper method to turn variable array types into constant array | ||||||
5999 | /// types in certain situations which would otherwise be errors (for | ||||||
6000 | /// GCC compatibility). | ||||||
6001 | static QualType TryToFixInvalidVariablyModifiedType(QualType T, | ||||||
6002 | ASTContext &Context, | ||||||
6003 | bool &SizeIsNegative, | ||||||
6004 | llvm::APSInt &Oversized) { | ||||||
6005 | // This method tries to turn a variable array into a constant | ||||||
6006 | // array even when the size isn't an ICE. This is necessary | ||||||
6007 | // for compatibility with code that depends on gcc's buggy | ||||||
6008 | // constant expression folding, like struct {char x[(int)(char*)2];} | ||||||
6009 | SizeIsNegative = false; | ||||||
6010 | Oversized = 0; | ||||||
6011 | |||||||
6012 | if (T->isDependentType()) | ||||||
6013 | return QualType(); | ||||||
6014 | |||||||
6015 | QualifierCollector Qs; | ||||||
6016 | const Type *Ty = Qs.strip(T); | ||||||
6017 | |||||||
6018 | if (const PointerType* PTy = dyn_cast<PointerType>(Ty)) { | ||||||
6019 | QualType Pointee = PTy->getPointeeType(); | ||||||
6020 | QualType FixedType = | ||||||
6021 | TryToFixInvalidVariablyModifiedType(Pointee, Context, SizeIsNegative, | ||||||
6022 | Oversized); | ||||||
6023 | if (FixedType.isNull()) return FixedType; | ||||||
6024 | FixedType = Context.getPointerType(FixedType); | ||||||
6025 | return Qs.apply(Context, FixedType); | ||||||
6026 | } | ||||||
6027 | if (const ParenType* PTy = dyn_cast<ParenType>(Ty)) { | ||||||
6028 | QualType Inner = PTy->getInnerType(); | ||||||
6029 | QualType FixedType = | ||||||
6030 | TryToFixInvalidVariablyModifiedType(Inner, Context, SizeIsNegative, | ||||||
6031 | Oversized); | ||||||
6032 | if (FixedType.isNull()) return FixedType; | ||||||
6033 | FixedType = Context.getParenType(FixedType); | ||||||
6034 | return Qs.apply(Context, FixedType); | ||||||
6035 | } | ||||||
6036 | |||||||
6037 | const VariableArrayType* VLATy = dyn_cast<VariableArrayType>(T); | ||||||
6038 | if (!VLATy) | ||||||
6039 | return QualType(); | ||||||
6040 | |||||||
6041 | QualType ElemTy = VLATy->getElementType(); | ||||||
6042 | if (ElemTy->isVariablyModifiedType()) { | ||||||
6043 | ElemTy = TryToFixInvalidVariablyModifiedType(ElemTy, Context, | ||||||
6044 | SizeIsNegative, Oversized); | ||||||
6045 | if (ElemTy.isNull()) | ||||||
6046 | return QualType(); | ||||||
6047 | } | ||||||
6048 | |||||||
6049 | Expr::EvalResult Result; | ||||||
6050 | if (!VLATy->getSizeExpr() || | ||||||
6051 | !VLATy->getSizeExpr()->EvaluateAsInt(Result, Context)) | ||||||
6052 | return QualType(); | ||||||
6053 | |||||||
6054 | llvm::APSInt Res = Result.Val.getInt(); | ||||||
6055 | |||||||
6056 | // Check whether the array size is negative. | ||||||
6057 | if (Res.isSigned() && Res.isNegative()) { | ||||||
6058 | SizeIsNegative = true; | ||||||
6059 | return QualType(); | ||||||
6060 | } | ||||||
6061 | |||||||
6062 | // Check whether the array is too large to be addressed. | ||||||
6063 | unsigned ActiveSizeBits = | ||||||
6064 | (!ElemTy->isDependentType() && !ElemTy->isVariablyModifiedType() && | ||||||
6065 | !ElemTy->isIncompleteType() && !ElemTy->isUndeducedType()) | ||||||
6066 | ? ConstantArrayType::getNumAddressingBits(Context, ElemTy, Res) | ||||||
6067 | : Res.getActiveBits(); | ||||||
6068 | if (ActiveSizeBits > ConstantArrayType::getMaxSizeBits(Context)) { | ||||||
6069 | Oversized = Res; | ||||||
6070 | return QualType(); | ||||||
6071 | } | ||||||
6072 | |||||||
6073 | QualType FoldedArrayType = Context.getConstantArrayType( | ||||||
6074 | ElemTy, Res, VLATy->getSizeExpr(), ArrayType::Normal, 0); | ||||||
6075 | return Qs.apply(Context, FoldedArrayType); | ||||||
6076 | } | ||||||
6077 | |||||||
6078 | static void | ||||||
6079 | FixInvalidVariablyModifiedTypeLoc(TypeLoc SrcTL, TypeLoc DstTL) { | ||||||
6080 | SrcTL = SrcTL.getUnqualifiedLoc(); | ||||||
6081 | DstTL = DstTL.getUnqualifiedLoc(); | ||||||
6082 | if (PointerTypeLoc SrcPTL = SrcTL.getAs<PointerTypeLoc>()) { | ||||||
6083 | PointerTypeLoc DstPTL = DstTL.castAs<PointerTypeLoc>(); | ||||||
6084 | FixInvalidVariablyModifiedTypeLoc(SrcPTL.getPointeeLoc(), | ||||||
6085 | DstPTL.getPointeeLoc()); | ||||||
6086 | DstPTL.setStarLoc(SrcPTL.getStarLoc()); | ||||||
6087 | return; | ||||||
6088 | } | ||||||
6089 | if (ParenTypeLoc SrcPTL = SrcTL.getAs<ParenTypeLoc>()) { | ||||||
6090 | ParenTypeLoc DstPTL = DstTL.castAs<ParenTypeLoc>(); | ||||||
6091 | FixInvalidVariablyModifiedTypeLoc(SrcPTL.getInnerLoc(), | ||||||
6092 | DstPTL.getInnerLoc()); | ||||||
6093 | DstPTL.setLParenLoc(SrcPTL.getLParenLoc()); | ||||||
6094 | DstPTL.setRParenLoc(SrcPTL.getRParenLoc()); | ||||||
6095 | return; | ||||||
6096 | } | ||||||
6097 | ArrayTypeLoc SrcATL = SrcTL.castAs<ArrayTypeLoc>(); | ||||||
6098 | ArrayTypeLoc DstATL = DstTL.castAs<ArrayTypeLoc>(); | ||||||
6099 | TypeLoc SrcElemTL = SrcATL.getElementLoc(); | ||||||
6100 | TypeLoc DstElemTL = DstATL.getElementLoc(); | ||||||
6101 | if (VariableArrayTypeLoc SrcElemATL = | ||||||
6102 | SrcElemTL.getAs<VariableArrayTypeLoc>()) { | ||||||
6103 | ConstantArrayTypeLoc DstElemATL = DstElemTL.castAs<ConstantArrayTypeLoc>(); | ||||||
6104 | FixInvalidVariablyModifiedTypeLoc(SrcElemATL, DstElemATL); | ||||||
6105 | } else { | ||||||
6106 | DstElemTL.initializeFullCopy(SrcElemTL); | ||||||
6107 | } | ||||||
6108 | DstATL.setLBracketLoc(SrcATL.getLBracketLoc()); | ||||||
6109 | DstATL.setSizeExpr(SrcATL.getSizeExpr()); | ||||||
6110 | DstATL.setRBracketLoc(SrcATL.getRBracketLoc()); | ||||||
6111 | } | ||||||
6112 | |||||||
6113 | /// Helper method to turn variable array types into constant array | ||||||
6114 | /// types in certain situations which would otherwise be errors (for | ||||||
6115 | /// GCC compatibility). | ||||||
6116 | static TypeSourceInfo* | ||||||
6117 | TryToFixInvalidVariablyModifiedTypeSourceInfo(TypeSourceInfo *TInfo, | ||||||
6118 | ASTContext &Context, | ||||||
6119 | bool &SizeIsNegative, | ||||||
6120 | llvm::APSInt &Oversized) { | ||||||
6121 | QualType FixedTy | ||||||
6122 | = TryToFixInvalidVariablyModifiedType(TInfo->getType(), Context, | ||||||
6123 | SizeIsNegative, Oversized); | ||||||
6124 | if (FixedTy.isNull()) | ||||||
6125 | return nullptr; | ||||||
6126 | TypeSourceInfo *FixedTInfo = Context.getTrivialTypeSourceInfo(FixedTy); | ||||||
6127 | FixInvalidVariablyModifiedTypeLoc(TInfo->getTypeLoc(), | ||||||
6128 | FixedTInfo->getTypeLoc()); | ||||||
6129 | return FixedTInfo; | ||||||
6130 | } | ||||||
6131 | |||||||
6132 | /// Attempt to fold a variable-sized type to a constant-sized type, returning | ||||||
6133 | /// true if we were successful. | ||||||
6134 | bool Sema::tryToFixVariablyModifiedVarType(TypeSourceInfo *&TInfo, | ||||||
6135 | QualType &T, SourceLocation Loc, | ||||||
6136 | unsigned FailedFoldDiagID) { | ||||||
6137 | bool SizeIsNegative; | ||||||
6138 | llvm::APSInt Oversized; | ||||||
6139 | TypeSourceInfo *FixedTInfo = TryToFixInvalidVariablyModifiedTypeSourceInfo( | ||||||
6140 | TInfo, Context, SizeIsNegative, Oversized); | ||||||
6141 | if (FixedTInfo) { | ||||||
6142 | Diag(Loc, diag::ext_vla_folded_to_constant); | ||||||
6143 | TInfo = FixedTInfo; | ||||||
6144 | T = FixedTInfo->getType(); | ||||||
6145 | return true; | ||||||
6146 | } | ||||||
6147 | |||||||
6148 | if (SizeIsNegative) | ||||||
6149 | Diag(Loc, diag::err_typecheck_negative_array_size); | ||||||
6150 | else if (Oversized.getBoolValue()) | ||||||
6151 | Diag(Loc, diag::err_array_too_large) << toString(Oversized, 10); | ||||||
6152 | else if (FailedFoldDiagID) | ||||||
6153 | Diag(Loc, FailedFoldDiagID); | ||||||
6154 | return false; | ||||||
6155 | } | ||||||
6156 | |||||||
6157 | /// Register the given locally-scoped extern "C" declaration so | ||||||
6158 | /// that it can be found later for redeclarations. We include any extern "C" | ||||||
6159 | /// declaration that is not visible in the translation unit here, not just | ||||||
6160 | /// function-scope declarations. | ||||||
6161 | void | ||||||
6162 | Sema::RegisterLocallyScopedExternCDecl(NamedDecl *ND, Scope *S) { | ||||||
6163 | if (!getLangOpts().CPlusPlus && | ||||||
6164 | ND->getLexicalDeclContext()->getRedeclContext()->isTranslationUnit()) | ||||||
6165 | // Don't need to track declarations in the TU in C. | ||||||
6166 | return; | ||||||
6167 | |||||||
6168 | // Note that we have a locally-scoped external with this name. | ||||||
6169 | Context.getExternCContextDecl()->makeDeclVisibleInContext(ND); | ||||||
6170 | } | ||||||
6171 | |||||||
6172 | NamedDecl *Sema::findLocallyScopedExternCDecl(DeclarationName Name) { | ||||||
6173 | // FIXME: We can have multiple results via __attribute__((overloadable)). | ||||||
6174 | auto Result = Context.getExternCContextDecl()->lookup(Name); | ||||||
6175 | return Result.empty() ? nullptr : *Result.begin(); | ||||||
6176 | } | ||||||
6177 | |||||||
6178 | /// Diagnose function specifiers on a declaration of an identifier that | ||||||
6179 | /// does not identify a function. | ||||||
6180 | void Sema::DiagnoseFunctionSpecifiers(const DeclSpec &DS) { | ||||||
6181 | // FIXME: We should probably indicate the identifier in question to avoid | ||||||
6182 | // confusion for constructs like "virtual int a(), b;" | ||||||
6183 | if (DS.isVirtualSpecified()) | ||||||
6184 | Diag(DS.getVirtualSpecLoc(), | ||||||
6185 | diag::err_virtual_non_function); | ||||||
6186 | |||||||
6187 | if (DS.hasExplicitSpecifier()) | ||||||
6188 | Diag(DS.getExplicitSpecLoc(), | ||||||
6189 | diag::err_explicit_non_function); | ||||||
6190 | |||||||
6191 | if (DS.isNoreturnSpecified()) | ||||||
6192 | Diag(DS.getNoreturnSpecLoc(), | ||||||
6193 | diag::err_noreturn_non_function); | ||||||
6194 | } | ||||||
6195 | |||||||
6196 | NamedDecl* | ||||||
6197 | Sema::ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, | ||||||
6198 | TypeSourceInfo *TInfo, LookupResult &Previous) { | ||||||
6199 | // Typedef declarators cannot be qualified (C++ [dcl.meaning]p1). | ||||||
6200 | if (D.getCXXScopeSpec().isSet()) { | ||||||
6201 | Diag(D.getIdentifierLoc(), diag::err_qualified_typedef_declarator) | ||||||
6202 | << D.getCXXScopeSpec().getRange(); | ||||||
6203 | D.setInvalidType(); | ||||||
6204 | // Pretend we didn't see the scope specifier. | ||||||
6205 | DC = CurContext; | ||||||
6206 | Previous.clear(); | ||||||
6207 | } | ||||||
6208 | |||||||
6209 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
6210 | |||||||
6211 | if (D.getDeclSpec().isInlineSpecified()) | ||||||
6212 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
6213 | << getLangOpts().CPlusPlus17; | ||||||
6214 | if (D.getDeclSpec().hasConstexprSpecifier()) | ||||||
6215 | Diag(D.getDeclSpec().getConstexprSpecLoc(), diag::err_invalid_constexpr) | ||||||
6216 | << 1 << static_cast<int>(D.getDeclSpec().getConstexprSpecifier()); | ||||||
6217 | |||||||
6218 | if (D.getName().Kind != UnqualifiedIdKind::IK_Identifier) { | ||||||
6219 | if (D.getName().Kind == UnqualifiedIdKind::IK_DeductionGuideName) | ||||||
6220 | Diag(D.getName().StartLocation, | ||||||
6221 | diag::err_deduction_guide_invalid_specifier) | ||||||
6222 | << "typedef"; | ||||||
6223 | else | ||||||
6224 | Diag(D.getName().StartLocation, diag::err_typedef_not_identifier) | ||||||
6225 | << D.getName().getSourceRange(); | ||||||
6226 | return nullptr; | ||||||
6227 | } | ||||||
6228 | |||||||
6229 | TypedefDecl *NewTD = ParseTypedefDecl(S, D, TInfo->getType(), TInfo); | ||||||
6230 | if (!NewTD) return nullptr; | ||||||
6231 | |||||||
6232 | // Handle attributes prior to checking for duplicates in MergeVarDecl | ||||||
6233 | ProcessDeclAttributes(S, NewTD, D); | ||||||
6234 | |||||||
6235 | CheckTypedefForVariablyModifiedType(S, NewTD); | ||||||
6236 | |||||||
6237 | bool Redeclaration = D.isRedeclaration(); | ||||||
6238 | NamedDecl *ND = ActOnTypedefNameDecl(S, DC, NewTD, Previous, Redeclaration); | ||||||
6239 | D.setRedeclaration(Redeclaration); | ||||||
6240 | return ND; | ||||||
6241 | } | ||||||
6242 | |||||||
6243 | void | ||||||
6244 | Sema::CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *NewTD) { | ||||||
6245 | // C99 6.7.7p2: If a typedef name specifies a variably modified type | ||||||
6246 | // then it shall have block scope. | ||||||
6247 | // Note that variably modified types must be fixed before merging the decl so | ||||||
6248 | // that redeclarations will match. | ||||||
6249 | TypeSourceInfo *TInfo = NewTD->getTypeSourceInfo(); | ||||||
6250 | QualType T = TInfo->getType(); | ||||||
6251 | if (T->isVariablyModifiedType()) { | ||||||
6252 | setFunctionHasBranchProtectedScope(); | ||||||
6253 | |||||||
6254 | if (S->getFnParent() == nullptr) { | ||||||
6255 | bool SizeIsNegative; | ||||||
6256 | llvm::APSInt Oversized; | ||||||
6257 | TypeSourceInfo *FixedTInfo = | ||||||
6258 | TryToFixInvalidVariablyModifiedTypeSourceInfo(TInfo, Context, | ||||||
6259 | SizeIsNegative, | ||||||
6260 | Oversized); | ||||||
6261 | if (FixedTInfo) { | ||||||
6262 | Diag(NewTD->getLocation(), diag::ext_vla_folded_to_constant); | ||||||
6263 | NewTD->setTypeSourceInfo(FixedTInfo); | ||||||
6264 | } else { | ||||||
6265 | if (SizeIsNegative) | ||||||
6266 | Diag(NewTD->getLocation(), diag::err_typecheck_negative_array_size); | ||||||
6267 | else if (T->isVariableArrayType()) | ||||||
6268 | Diag(NewTD->getLocation(), diag::err_vla_decl_in_file_scope); | ||||||
6269 | else if (Oversized.getBoolValue()) | ||||||
6270 | Diag(NewTD->getLocation(), diag::err_array_too_large) | ||||||
6271 | << toString(Oversized, 10); | ||||||
6272 | else | ||||||
6273 | Diag(NewTD->getLocation(), diag::err_vm_decl_in_file_scope); | ||||||
6274 | NewTD->setInvalidDecl(); | ||||||
6275 | } | ||||||
6276 | } | ||||||
6277 | } | ||||||
6278 | } | ||||||
6279 | |||||||
6280 | /// ActOnTypedefNameDecl - Perform semantic checking for a declaration which | ||||||
6281 | /// declares a typedef-name, either using the 'typedef' type specifier or via | ||||||
6282 | /// a C++0x [dcl.typedef]p2 alias-declaration: 'using T = A;'. | ||||||
6283 | NamedDecl* | ||||||
6284 | Sema::ActOnTypedefNameDecl(Scope *S, DeclContext *DC, TypedefNameDecl *NewTD, | ||||||
6285 | LookupResult &Previous, bool &Redeclaration) { | ||||||
6286 | |||||||
6287 | // Find the shadowed declaration before filtering for scope. | ||||||
6288 | NamedDecl *ShadowedDecl = getShadowedDeclaration(NewTD, Previous); | ||||||
6289 | |||||||
6290 | // Merge the decl with the existing one if appropriate. If the decl is | ||||||
6291 | // in an outer scope, it isn't the same thing. | ||||||
6292 | FilterLookupForScope(Previous, DC, S, /*ConsiderLinkage*/false, | ||||||
6293 | /*AllowInlineNamespace*/false); | ||||||
6294 | filterNonConflictingPreviousTypedefDecls(*this, NewTD, Previous); | ||||||
6295 | if (!Previous.empty()) { | ||||||
6296 | Redeclaration = true; | ||||||
6297 | MergeTypedefNameDecl(S, NewTD, Previous); | ||||||
6298 | } else { | ||||||
6299 | inferGslPointerAttribute(NewTD); | ||||||
6300 | } | ||||||
6301 | |||||||
6302 | if (ShadowedDecl && !Redeclaration) | ||||||
6303 | CheckShadow(NewTD, ShadowedDecl, Previous); | ||||||
6304 | |||||||
6305 | // If this is the C FILE type, notify the AST context. | ||||||
6306 | if (IdentifierInfo *II = NewTD->getIdentifier()) | ||||||
6307 | if (!NewTD->isInvalidDecl() && | ||||||
6308 | NewTD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
6309 | if (II->isStr("FILE")) | ||||||
6310 | Context.setFILEDecl(NewTD); | ||||||
6311 | else if (II->isStr("jmp_buf")) | ||||||
6312 | Context.setjmp_bufDecl(NewTD); | ||||||
6313 | else if (II->isStr("sigjmp_buf")) | ||||||
6314 | Context.setsigjmp_bufDecl(NewTD); | ||||||
6315 | else if (II->isStr("ucontext_t")) | ||||||
6316 | Context.setucontext_tDecl(NewTD); | ||||||
6317 | } | ||||||
6318 | |||||||
6319 | return NewTD; | ||||||
6320 | } | ||||||
6321 | |||||||
6322 | /// Determines whether the given declaration is an out-of-scope | ||||||
6323 | /// previous declaration. | ||||||
6324 | /// | ||||||
6325 | /// This routine should be invoked when name lookup has found a | ||||||
6326 | /// previous declaration (PrevDecl) that is not in the scope where a | ||||||
6327 | /// new declaration by the same name is being introduced. If the new | ||||||
6328 | /// declaration occurs in a local scope, previous declarations with | ||||||
6329 | /// linkage may still be considered previous declarations (C99 | ||||||
6330 | /// 6.2.2p4-5, C++ [basic.link]p6). | ||||||
6331 | /// | ||||||
6332 | /// \param PrevDecl the previous declaration found by name | ||||||
6333 | /// lookup | ||||||
6334 | /// | ||||||
6335 | /// \param DC the context in which the new declaration is being | ||||||
6336 | /// declared. | ||||||
6337 | /// | ||||||
6338 | /// \returns true if PrevDecl is an out-of-scope previous declaration | ||||||
6339 | /// for a new delcaration with the same name. | ||||||
6340 | static bool | ||||||
6341 | isOutOfScopePreviousDeclaration(NamedDecl *PrevDecl, DeclContext *DC, | ||||||
6342 | ASTContext &Context) { | ||||||
6343 | if (!PrevDecl) | ||||||
6344 | return false; | ||||||
6345 | |||||||
6346 | if (!PrevDecl->hasLinkage()) | ||||||
6347 | return false; | ||||||
6348 | |||||||
6349 | if (Context.getLangOpts().CPlusPlus) { | ||||||
6350 | // C++ [basic.link]p6: | ||||||
6351 | // If there is a visible declaration of an entity with linkage | ||||||
6352 | // having the same name and type, ignoring entities declared | ||||||
6353 | // outside the innermost enclosing namespace scope, the block | ||||||
6354 | // scope declaration declares that same entity and receives the | ||||||
6355 | // linkage of the previous declaration. | ||||||
6356 | DeclContext *OuterContext = DC->getRedeclContext(); | ||||||
6357 | if (!OuterContext->isFunctionOrMethod()) | ||||||
6358 | // This rule only applies to block-scope declarations. | ||||||
6359 | return false; | ||||||
6360 | |||||||
6361 | DeclContext *PrevOuterContext = PrevDecl->getDeclContext(); | ||||||
6362 | if (PrevOuterContext->isRecord()) | ||||||
6363 | // We found a member function: ignore it. | ||||||
6364 | return false; | ||||||
6365 | |||||||
6366 | // Find the innermost enclosing namespace for the new and | ||||||
6367 | // previous declarations. | ||||||
6368 | OuterContext = OuterContext->getEnclosingNamespaceContext(); | ||||||
6369 | PrevOuterContext = PrevOuterContext->getEnclosingNamespaceContext(); | ||||||
6370 | |||||||
6371 | // The previous declaration is in a different namespace, so it | ||||||
6372 | // isn't the same function. | ||||||
6373 | if (!OuterContext->Equals(PrevOuterContext)) | ||||||
6374 | return false; | ||||||
6375 | } | ||||||
6376 | |||||||
6377 | return true; | ||||||
6378 | } | ||||||
6379 | |||||||
6380 | static void SetNestedNameSpecifier(Sema &S, DeclaratorDecl *DD, Declarator &D) { | ||||||
6381 | CXXScopeSpec &SS = D.getCXXScopeSpec(); | ||||||
6382 | if (!SS.isSet()) return; | ||||||
6383 | DD->setQualifierInfo(SS.getWithLocInContext(S.Context)); | ||||||
6384 | } | ||||||
6385 | |||||||
6386 | bool Sema::inferObjCARCLifetime(ValueDecl *decl) { | ||||||
6387 | QualType type = decl->getType(); | ||||||
6388 | Qualifiers::ObjCLifetime lifetime = type.getObjCLifetime(); | ||||||
6389 | if (lifetime == Qualifiers::OCL_Autoreleasing) { | ||||||
6390 | // Various kinds of declaration aren't allowed to be __autoreleasing. | ||||||
6391 | unsigned kind = -1U; | ||||||
6392 | if (VarDecl *var = dyn_cast<VarDecl>(decl)) { | ||||||
6393 | if (var->hasAttr<BlocksAttr>()) | ||||||
6394 | kind = 0; // __block | ||||||
6395 | else if (!var->hasLocalStorage()) | ||||||
6396 | kind = 1; // global | ||||||
6397 | } else if (isa<ObjCIvarDecl>(decl)) { | ||||||
6398 | kind = 3; // ivar | ||||||
6399 | } else if (isa<FieldDecl>(decl)) { | ||||||
6400 | kind = 2; // field | ||||||
6401 | } | ||||||
6402 | |||||||
6403 | if (kind != -1U) { | ||||||
6404 | Diag(decl->getLocation(), diag::err_arc_autoreleasing_var) | ||||||
6405 | << kind; | ||||||
6406 | } | ||||||
6407 | } else if (lifetime == Qualifiers::OCL_None) { | ||||||
6408 | // Try to infer lifetime. | ||||||
6409 | if (!type->isObjCLifetimeType()) | ||||||
6410 | return false; | ||||||
6411 | |||||||
6412 | lifetime = type->getObjCARCImplicitLifetime(); | ||||||
6413 | type = Context.getLifetimeQualifiedType(type, lifetime); | ||||||
6414 | decl->setType(type); | ||||||
6415 | } | ||||||
6416 | |||||||
6417 | if (VarDecl *var = dyn_cast<VarDecl>(decl)) { | ||||||
6418 | // Thread-local variables cannot have lifetime. | ||||||
6419 | if (lifetime && lifetime != Qualifiers::OCL_ExplicitNone && | ||||||
6420 | var->getTLSKind()) { | ||||||
6421 | Diag(var->getLocation(), diag::err_arc_thread_ownership) | ||||||
6422 | << var->getType(); | ||||||
6423 | return true; | ||||||
6424 | } | ||||||
6425 | } | ||||||
6426 | |||||||
6427 | return false; | ||||||
6428 | } | ||||||
6429 | |||||||
6430 | void Sema::deduceOpenCLAddressSpace(ValueDecl *Decl) { | ||||||
6431 | if (Decl->getType().hasAddressSpace()) | ||||||
6432 | return; | ||||||
6433 | if (Decl->getType()->isDependentType()) | ||||||
6434 | return; | ||||||
6435 | if (VarDecl *Var = dyn_cast<VarDecl>(Decl)) { | ||||||
6436 | QualType Type = Var->getType(); | ||||||
6437 | if (Type->isSamplerT() || Type->isVoidType()) | ||||||
6438 | return; | ||||||
6439 | LangAS ImplAS = LangAS::opencl_private; | ||||||
6440 | // OpenCL C v3.0 s6.7.8 - For OpenCL C 2.0 or with the | ||||||
6441 | // __opencl_c_program_scope_global_variables feature, the address space | ||||||
6442 | // for a variable at program scope or a static or extern variable inside | ||||||
6443 | // a function are inferred to be __global. | ||||||
6444 | if (getOpenCLOptions().areProgramScopeVariablesSupported(getLangOpts()) && | ||||||
6445 | Var->hasGlobalStorage()) | ||||||
6446 | ImplAS = LangAS::opencl_global; | ||||||
6447 | // If the original type from a decayed type is an array type and that array | ||||||
6448 | // type has no address space yet, deduce it now. | ||||||
6449 | if (auto DT = dyn_cast<DecayedType>(Type)) { | ||||||
6450 | auto OrigTy = DT->getOriginalType(); | ||||||
6451 | if (!OrigTy.hasAddressSpace() && OrigTy->isArrayType()) { | ||||||
6452 | // Add the address space to the original array type and then propagate | ||||||
6453 | // that to the element type through `getAsArrayType`. | ||||||
6454 | OrigTy = Context.getAddrSpaceQualType(OrigTy, ImplAS); | ||||||
6455 | OrigTy = QualType(Context.getAsArrayType(OrigTy), 0); | ||||||
6456 | // Re-generate the decayed type. | ||||||
6457 | Type = Context.getDecayedType(OrigTy); | ||||||
6458 | } | ||||||
6459 | } | ||||||
6460 | Type = Context.getAddrSpaceQualType(Type, ImplAS); | ||||||
6461 | // Apply any qualifiers (including address space) from the array type to | ||||||
6462 | // the element type. This implements C99 6.7.3p8: "If the specification of | ||||||
6463 | // an array type includes any type qualifiers, the element type is so | ||||||
6464 | // qualified, not the array type." | ||||||
6465 | if (Type->isArrayType()) | ||||||
6466 | Type = QualType(Context.getAsArrayType(Type), 0); | ||||||
6467 | Decl->setType(Type); | ||||||
6468 | } | ||||||
6469 | } | ||||||
6470 | |||||||
6471 | static void checkAttributesAfterMerging(Sema &S, NamedDecl &ND) { | ||||||
6472 | // Ensure that an auto decl is deduced otherwise the checks below might cache | ||||||
6473 | // the wrong linkage. | ||||||
6474 | assert(S.ParsingInitForAutoVars.count(&ND) == 0)(static_cast <bool> (S.ParsingInitForAutoVars.count(& ND) == 0) ? void (0) : __assert_fail ("S.ParsingInitForAutoVars.count(&ND) == 0" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 6474, __extension__ __PRETTY_FUNCTION__)); | ||||||
6475 | |||||||
6476 | // 'weak' only applies to declarations with external linkage. | ||||||
6477 | if (WeakAttr *Attr = ND.getAttr<WeakAttr>()) { | ||||||
6478 | if (!ND.isExternallyVisible()) { | ||||||
6479 | S.Diag(Attr->getLocation(), diag::err_attribute_weak_static); | ||||||
6480 | ND.dropAttr<WeakAttr>(); | ||||||
6481 | } | ||||||
6482 | } | ||||||
6483 | if (WeakRefAttr *Attr = ND.getAttr<WeakRefAttr>()) { | ||||||
6484 | if (ND.isExternallyVisible()) { | ||||||
6485 | S.Diag(Attr->getLocation(), diag::err_attribute_weakref_not_static); | ||||||
6486 | ND.dropAttr<WeakRefAttr>(); | ||||||
6487 | ND.dropAttr<AliasAttr>(); | ||||||
6488 | } | ||||||
6489 | } | ||||||
6490 | |||||||
6491 | if (auto *VD = dyn_cast<VarDecl>(&ND)) { | ||||||
6492 | if (VD->hasInit()) { | ||||||
6493 | if (const auto *Attr = VD->getAttr<AliasAttr>()) { | ||||||
6494 | assert(VD->isThisDeclarationADefinition() &&(static_cast <bool> (VD->isThisDeclarationADefinition () && !VD->isExternallyVisible() && "Broken AliasAttr handled late!" ) ? void (0) : __assert_fail ("VD->isThisDeclarationADefinition() && !VD->isExternallyVisible() && \"Broken AliasAttr handled late!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 6495, __extension__ __PRETTY_FUNCTION__)) | ||||||
6495 | !VD->isExternallyVisible() && "Broken AliasAttr handled late!")(static_cast <bool> (VD->isThisDeclarationADefinition () && !VD->isExternallyVisible() && "Broken AliasAttr handled late!" ) ? void (0) : __assert_fail ("VD->isThisDeclarationADefinition() && !VD->isExternallyVisible() && \"Broken AliasAttr handled late!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 6495, __extension__ __PRETTY_FUNCTION__)); | ||||||
6496 | S.Diag(Attr->getLocation(), diag::err_alias_is_definition) << VD << 0; | ||||||
6497 | VD->dropAttr<AliasAttr>(); | ||||||
6498 | } | ||||||
6499 | } | ||||||
6500 | } | ||||||
6501 | |||||||
6502 | // 'selectany' only applies to externally visible variable declarations. | ||||||
6503 | // It does not apply to functions. | ||||||
6504 | if (SelectAnyAttr *Attr = ND.getAttr<SelectAnyAttr>()) { | ||||||
6505 | if (isa<FunctionDecl>(ND) || !ND.isExternallyVisible()) { | ||||||
6506 | S.Diag(Attr->getLocation(), | ||||||
6507 | diag::err_attribute_selectany_non_extern_data); | ||||||
6508 | ND.dropAttr<SelectAnyAttr>(); | ||||||
6509 | } | ||||||
6510 | } | ||||||
6511 | |||||||
6512 | if (const InheritableAttr *Attr = getDLLAttr(&ND)) { | ||||||
6513 | auto *VD = dyn_cast<VarDecl>(&ND); | ||||||
6514 | bool IsAnonymousNS = false; | ||||||
6515 | bool IsMicrosoft = S.Context.getTargetInfo().getCXXABI().isMicrosoft(); | ||||||
6516 | if (VD) { | ||||||
6517 | const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(VD->getDeclContext()); | ||||||
6518 | while (NS && !IsAnonymousNS) { | ||||||
6519 | IsAnonymousNS = NS->isAnonymousNamespace(); | ||||||
6520 | NS = dyn_cast<NamespaceDecl>(NS->getParent()); | ||||||
6521 | } | ||||||
6522 | } | ||||||
6523 | // dll attributes require external linkage. Static locals may have external | ||||||
6524 | // linkage but still cannot be explicitly imported or exported. | ||||||
6525 | // In Microsoft mode, a variable defined in anonymous namespace must have | ||||||
6526 | // external linkage in order to be exported. | ||||||
6527 | bool AnonNSInMicrosoftMode = IsAnonymousNS && IsMicrosoft; | ||||||
6528 | if ((ND.isExternallyVisible() && AnonNSInMicrosoftMode) || | ||||||
6529 | (!AnonNSInMicrosoftMode && | ||||||
6530 | (!ND.isExternallyVisible() || (VD && VD->isStaticLocal())))) { | ||||||
6531 | S.Diag(ND.getLocation(), diag::err_attribute_dll_not_extern) | ||||||
6532 | << &ND << Attr; | ||||||
6533 | ND.setInvalidDecl(); | ||||||
6534 | } | ||||||
6535 | } | ||||||
6536 | |||||||
6537 | // Check the attributes on the function type, if any. | ||||||
6538 | if (const auto *FD = dyn_cast<FunctionDecl>(&ND)) { | ||||||
6539 | // Don't declare this variable in the second operand of the for-statement; | ||||||
6540 | // GCC miscompiles that by ending its lifetime before evaluating the | ||||||
6541 | // third operand. See gcc.gnu.org/PR86769. | ||||||
6542 | AttributedTypeLoc ATL; | ||||||
6543 | for (TypeLoc TL = FD->getTypeSourceInfo()->getTypeLoc(); | ||||||
6544 | (ATL = TL.getAsAdjusted<AttributedTypeLoc>()); | ||||||
6545 | TL = ATL.getModifiedLoc()) { | ||||||
6546 | // The [[lifetimebound]] attribute can be applied to the implicit object | ||||||
6547 | // parameter of a non-static member function (other than a ctor or dtor) | ||||||
6548 | // by applying it to the function type. | ||||||
6549 | if (const auto *A = ATL.getAttrAs<LifetimeBoundAttr>()) { | ||||||
6550 | const auto *MD = dyn_cast<CXXMethodDecl>(FD); | ||||||
6551 | if (!MD || MD->isStatic()) { | ||||||
6552 | S.Diag(A->getLocation(), diag::err_lifetimebound_no_object_param) | ||||||
6553 | << !MD << A->getRange(); | ||||||
6554 | } else if (isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) { | ||||||
6555 | S.Diag(A->getLocation(), diag::err_lifetimebound_ctor_dtor) | ||||||
6556 | << isa<CXXDestructorDecl>(MD) << A->getRange(); | ||||||
6557 | } | ||||||
6558 | } | ||||||
6559 | } | ||||||
6560 | } | ||||||
6561 | } | ||||||
6562 | |||||||
6563 | static void checkDLLAttributeRedeclaration(Sema &S, NamedDecl *OldDecl, | ||||||
6564 | NamedDecl *NewDecl, | ||||||
6565 | bool IsSpecialization, | ||||||
6566 | bool IsDefinition) { | ||||||
6567 | if (OldDecl->isInvalidDecl() || NewDecl->isInvalidDecl()) | ||||||
6568 | return; | ||||||
6569 | |||||||
6570 | bool IsTemplate = false; | ||||||
6571 | if (TemplateDecl *OldTD = dyn_cast<TemplateDecl>(OldDecl)) { | ||||||
6572 | OldDecl = OldTD->getTemplatedDecl(); | ||||||
6573 | IsTemplate = true; | ||||||
6574 | if (!IsSpecialization) | ||||||
6575 | IsDefinition = false; | ||||||
6576 | } | ||||||
6577 | if (TemplateDecl *NewTD = dyn_cast<TemplateDecl>(NewDecl)) { | ||||||
6578 | NewDecl = NewTD->getTemplatedDecl(); | ||||||
6579 | IsTemplate = true; | ||||||
6580 | } | ||||||
6581 | |||||||
6582 | if (!OldDecl || !NewDecl) | ||||||
6583 | return; | ||||||
6584 | |||||||
6585 | const DLLImportAttr *OldImportAttr = OldDecl->getAttr<DLLImportAttr>(); | ||||||
6586 | const DLLExportAttr *OldExportAttr = OldDecl->getAttr<DLLExportAttr>(); | ||||||
6587 | const DLLImportAttr *NewImportAttr = NewDecl->getAttr<DLLImportAttr>(); | ||||||
6588 | const DLLExportAttr *NewExportAttr = NewDecl->getAttr<DLLExportAttr>(); | ||||||
6589 | |||||||
6590 | // dllimport and dllexport are inheritable attributes so we have to exclude | ||||||
6591 | // inherited attribute instances. | ||||||
6592 | bool HasNewAttr = (NewImportAttr && !NewImportAttr->isInherited()) || | ||||||
6593 | (NewExportAttr && !NewExportAttr->isInherited()); | ||||||
6594 | |||||||
6595 | // A redeclaration is not allowed to add a dllimport or dllexport attribute, | ||||||
6596 | // the only exception being explicit specializations. | ||||||
6597 | // Implicitly generated declarations are also excluded for now because there | ||||||
6598 | // is no other way to switch these to use dllimport or dllexport. | ||||||
6599 | bool AddsAttr = !(OldImportAttr || OldExportAttr) && HasNewAttr; | ||||||
6600 | |||||||
6601 | if (AddsAttr && !IsSpecialization && !OldDecl->isImplicit()) { | ||||||
6602 | // Allow with a warning for free functions and global variables. | ||||||
6603 | bool JustWarn = false; | ||||||
6604 | if (!OldDecl->isCXXClassMember()) { | ||||||
6605 | auto *VD = dyn_cast<VarDecl>(OldDecl); | ||||||
6606 | if (VD && !VD->getDescribedVarTemplate()) | ||||||
6607 | JustWarn = true; | ||||||
6608 | auto *FD = dyn_cast<FunctionDecl>(OldDecl); | ||||||
6609 | if (FD && FD->getTemplatedKind() == FunctionDecl::TK_NonTemplate) | ||||||
6610 | JustWarn = true; | ||||||
6611 | } | ||||||
6612 | |||||||
6613 | // We cannot change a declaration that's been used because IR has already | ||||||
6614 | // been emitted. Dllimported functions will still work though (modulo | ||||||
6615 | // address equality) as they can use the thunk. | ||||||
6616 | if (OldDecl->isUsed()) | ||||||
6617 | if (!isa<FunctionDecl>(OldDecl) || !NewImportAttr) | ||||||
6618 | JustWarn = false; | ||||||
6619 | |||||||
6620 | unsigned DiagID = JustWarn ? diag::warn_attribute_dll_redeclaration | ||||||
6621 | : diag::err_attribute_dll_redeclaration; | ||||||
6622 | S.Diag(NewDecl->getLocation(), DiagID) | ||||||
6623 | << NewDecl | ||||||
6624 | << (NewImportAttr ? (const Attr *)NewImportAttr : NewExportAttr); | ||||||
6625 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6626 | if (!JustWarn) { | ||||||
6627 | NewDecl->setInvalidDecl(); | ||||||
6628 | return; | ||||||
6629 | } | ||||||
6630 | } | ||||||
6631 | |||||||
6632 | // A redeclaration is not allowed to drop a dllimport attribute, the only | ||||||
6633 | // exceptions being inline function definitions (except for function | ||||||
6634 | // templates), local extern declarations, qualified friend declarations or | ||||||
6635 | // special MSVC extension: in the last case, the declaration is treated as if | ||||||
6636 | // it were marked dllexport. | ||||||
6637 | bool IsInline = false, IsStaticDataMember = false, IsQualifiedFriend = false; | ||||||
6638 | bool IsMicrosoftABI = S.Context.getTargetInfo().shouldDLLImportComdatSymbols(); | ||||||
6639 | if (const auto *VD = dyn_cast<VarDecl>(NewDecl)) { | ||||||
6640 | // Ignore static data because out-of-line definitions are diagnosed | ||||||
6641 | // separately. | ||||||
6642 | IsStaticDataMember = VD->isStaticDataMember(); | ||||||
6643 | IsDefinition = VD->isThisDeclarationADefinition(S.Context) != | ||||||
6644 | VarDecl::DeclarationOnly; | ||||||
6645 | } else if (const auto *FD = dyn_cast<FunctionDecl>(NewDecl)) { | ||||||
6646 | IsInline = FD->isInlined(); | ||||||
6647 | IsQualifiedFriend = FD->getQualifier() && | ||||||
6648 | FD->getFriendObjectKind() == Decl::FOK_Declared; | ||||||
6649 | } | ||||||
6650 | |||||||
6651 | if (OldImportAttr && !HasNewAttr && | ||||||
6652 | (!IsInline || (IsMicrosoftABI && IsTemplate)) && !IsStaticDataMember && | ||||||
6653 | !NewDecl->isLocalExternDecl() && !IsQualifiedFriend) { | ||||||
6654 | if (IsMicrosoftABI && IsDefinition) { | ||||||
6655 | S.Diag(NewDecl->getLocation(), | ||||||
6656 | diag::warn_redeclaration_without_import_attribute) | ||||||
6657 | << NewDecl; | ||||||
6658 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6659 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6660 | NewDecl->addAttr( | ||||||
6661 | DLLExportAttr::CreateImplicit(S.Context, NewImportAttr->getRange())); | ||||||
6662 | } else { | ||||||
6663 | S.Diag(NewDecl->getLocation(), | ||||||
6664 | diag::warn_redeclaration_without_attribute_prev_attribute_ignored) | ||||||
6665 | << NewDecl << OldImportAttr; | ||||||
6666 | S.Diag(OldDecl->getLocation(), diag::note_previous_declaration); | ||||||
6667 | S.Diag(OldImportAttr->getLocation(), diag::note_previous_attribute); | ||||||
6668 | OldDecl->dropAttr<DLLImportAttr>(); | ||||||
6669 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6670 | } | ||||||
6671 | } else if (IsInline && OldImportAttr && !IsMicrosoftABI) { | ||||||
6672 | // In MinGW, seeing a function declared inline drops the dllimport | ||||||
6673 | // attribute. | ||||||
6674 | OldDecl->dropAttr<DLLImportAttr>(); | ||||||
6675 | NewDecl->dropAttr<DLLImportAttr>(); | ||||||
6676 | S.Diag(NewDecl->getLocation(), | ||||||
6677 | diag::warn_dllimport_dropped_from_inline_function) | ||||||
6678 | << NewDecl << OldImportAttr; | ||||||
6679 | } | ||||||
6680 | |||||||
6681 | // A specialization of a class template member function is processed here | ||||||
6682 | // since it's a redeclaration. If the parent class is dllexport, the | ||||||
6683 | // specialization inherits that attribute. This doesn't happen automatically | ||||||
6684 | // since the parent class isn't instantiated until later. | ||||||
6685 | if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewDecl)) { | ||||||
6686 | if (MD->getTemplatedKind() == FunctionDecl::TK_MemberSpecialization && | ||||||
6687 | !NewImportAttr && !NewExportAttr) { | ||||||
6688 | if (const DLLExportAttr *ParentExportAttr = | ||||||
6689 | MD->getParent()->getAttr<DLLExportAttr>()) { | ||||||
6690 | DLLExportAttr *NewAttr = ParentExportAttr->clone(S.Context); | ||||||
6691 | NewAttr->setInherited(true); | ||||||
6692 | NewDecl->addAttr(NewAttr); | ||||||
6693 | } | ||||||
6694 | } | ||||||
6695 | } | ||||||
6696 | } | ||||||
6697 | |||||||
6698 | /// Given that we are within the definition of the given function, | ||||||
6699 | /// will that definition behave like C99's 'inline', where the | ||||||
6700 | /// definition is discarded except for optimization purposes? | ||||||
6701 | static bool isFunctionDefinitionDiscarded(Sema &S, FunctionDecl *FD) { | ||||||
6702 | // Try to avoid calling GetGVALinkageForFunction. | ||||||
6703 | |||||||
6704 | // All cases of this require the 'inline' keyword. | ||||||
6705 | if (!FD->isInlined()) return false; | ||||||
6706 | |||||||
6707 | // This is only possible in C++ with the gnu_inline attribute. | ||||||
6708 | if (S.getLangOpts().CPlusPlus && !FD->hasAttr<GNUInlineAttr>()) | ||||||
6709 | return false; | ||||||
6710 | |||||||
6711 | // Okay, go ahead and call the relatively-more-expensive function. | ||||||
6712 | return S.Context.GetGVALinkageForFunction(FD) == GVA_AvailableExternally; | ||||||
6713 | } | ||||||
6714 | |||||||
6715 | /// Determine whether a variable is extern "C" prior to attaching | ||||||
6716 | /// an initializer. We can't just call isExternC() here, because that | ||||||
6717 | /// will also compute and cache whether the declaration is externally | ||||||
6718 | /// visible, which might change when we attach the initializer. | ||||||
6719 | /// | ||||||
6720 | /// This can only be used if the declaration is known to not be a | ||||||
6721 | /// redeclaration of an internal linkage declaration. | ||||||
6722 | /// | ||||||
6723 | /// For instance: | ||||||
6724 | /// | ||||||
6725 | /// auto x = []{}; | ||||||
6726 | /// | ||||||
6727 | /// Attaching the initializer here makes this declaration not externally | ||||||
6728 | /// visible, because its type has internal linkage. | ||||||
6729 | /// | ||||||
6730 | /// FIXME: This is a hack. | ||||||
6731 | template<typename T> | ||||||
6732 | static bool isIncompleteDeclExternC(Sema &S, const T *D) { | ||||||
6733 | if (S.getLangOpts().CPlusPlus) { | ||||||
6734 | // In C++, the overloadable attribute negates the effects of extern "C". | ||||||
6735 | if (!D->isInExternCContext() || D->template hasAttr<OverloadableAttr>()) | ||||||
6736 | return false; | ||||||
6737 | |||||||
6738 | // So do CUDA's host/device attributes. | ||||||
6739 | if (S.getLangOpts().CUDA && (D->template hasAttr<CUDADeviceAttr>() || | ||||||
6740 | D->template hasAttr<CUDAHostAttr>())) | ||||||
6741 | return false; | ||||||
6742 | } | ||||||
6743 | return D->isExternC(); | ||||||
6744 | } | ||||||
6745 | |||||||
6746 | static bool shouldConsiderLinkage(const VarDecl *VD) { | ||||||
6747 | const DeclContext *DC = VD->getDeclContext()->getRedeclContext(); | ||||||
6748 | if (DC->isFunctionOrMethod() || isa<OMPDeclareReductionDecl>(DC) || | ||||||
6749 | isa<OMPDeclareMapperDecl>(DC)) | ||||||
6750 | return VD->hasExternalStorage(); | ||||||
6751 | if (DC->isFileContext()) | ||||||
6752 | return true; | ||||||
6753 | if (DC->isRecord()) | ||||||
6754 | return false; | ||||||
6755 | if (isa<RequiresExprBodyDecl>(DC)) | ||||||
6756 | return false; | ||||||
6757 | llvm_unreachable("Unexpected context")::llvm::llvm_unreachable_internal("Unexpected context", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 6757); | ||||||
6758 | } | ||||||
6759 | |||||||
6760 | static bool shouldConsiderLinkage(const FunctionDecl *FD) { | ||||||
6761 | const DeclContext *DC = FD->getDeclContext()->getRedeclContext(); | ||||||
6762 | if (DC->isFileContext() || DC->isFunctionOrMethod() || | ||||||
6763 | isa<OMPDeclareReductionDecl>(DC) || isa<OMPDeclareMapperDecl>(DC)) | ||||||
6764 | return true; | ||||||
6765 | if (DC->isRecord()) | ||||||
6766 | return false; | ||||||
6767 | llvm_unreachable("Unexpected context")::llvm::llvm_unreachable_internal("Unexpected context", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 6767); | ||||||
6768 | } | ||||||
6769 | |||||||
6770 | static bool hasParsedAttr(Scope *S, const Declarator &PD, | ||||||
6771 | ParsedAttr::Kind Kind) { | ||||||
6772 | // Check decl attributes on the DeclSpec. | ||||||
6773 | if (PD.getDeclSpec().getAttributes().hasAttribute(Kind)) | ||||||
6774 | return true; | ||||||
6775 | |||||||
6776 | // Walk the declarator structure, checking decl attributes that were in a type | ||||||
6777 | // position to the decl itself. | ||||||
6778 | for (unsigned I = 0, E = PD.getNumTypeObjects(); I != E; ++I) { | ||||||
6779 | if (PD.getTypeObject(I).getAttrs().hasAttribute(Kind)) | ||||||
6780 | return true; | ||||||
6781 | } | ||||||
6782 | |||||||
6783 | // Finally, check attributes on the decl itself. | ||||||
6784 | return PD.getAttributes().hasAttribute(Kind); | ||||||
6785 | } | ||||||
6786 | |||||||
6787 | /// Adjust the \c DeclContext for a function or variable that might be a | ||||||
6788 | /// function-local external declaration. | ||||||
6789 | bool Sema::adjustContextForLocalExternDecl(DeclContext *&DC) { | ||||||
6790 | if (!DC->isFunctionOrMethod()) | ||||||
6791 | return false; | ||||||
6792 | |||||||
6793 | // If this is a local extern function or variable declared within a function | ||||||
6794 | // template, don't add it into the enclosing namespace scope until it is | ||||||
6795 | // instantiated; it might have a dependent type right now. | ||||||
6796 | if (DC->isDependentContext()) | ||||||
6797 | return true; | ||||||
6798 | |||||||
6799 | // C++11 [basic.link]p7: | ||||||
6800 | // When a block scope declaration of an entity with linkage is not found to | ||||||
6801 | // refer to some other declaration, then that entity is a member of the | ||||||
6802 | // innermost enclosing namespace. | ||||||
6803 | // | ||||||
6804 | // Per C++11 [namespace.def]p6, the innermost enclosing namespace is a | ||||||
6805 | // semantically-enclosing namespace, not a lexically-enclosing one. | ||||||
6806 | while (!DC->isFileContext() && !isa<LinkageSpecDecl>(DC)) | ||||||
6807 | DC = DC->getParent(); | ||||||
6808 | return true; | ||||||
6809 | } | ||||||
6810 | |||||||
6811 | /// Returns true if given declaration has external C language linkage. | ||||||
6812 | static bool isDeclExternC(const Decl *D) { | ||||||
6813 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) | ||||||
6814 | return FD->isExternC(); | ||||||
6815 | if (const auto *VD = dyn_cast<VarDecl>(D)) | ||||||
6816 | return VD->isExternC(); | ||||||
6817 | |||||||
6818 | llvm_unreachable("Unknown type of decl!")::llvm::llvm_unreachable_internal("Unknown type of decl!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 6818); | ||||||
6819 | } | ||||||
6820 | |||||||
6821 | /// Returns true if there hasn't been any invalid type diagnosed. | ||||||
6822 | static bool diagnoseOpenCLTypes(Sema &Se, VarDecl *NewVD) { | ||||||
6823 | DeclContext *DC = NewVD->getDeclContext(); | ||||||
6824 | QualType R = NewVD->getType(); | ||||||
6825 | |||||||
6826 | // OpenCL v2.0 s6.9.b - Image type can only be used as a function argument. | ||||||
6827 | // OpenCL v2.0 s6.13.16.1 - Pipe type can only be used as a function | ||||||
6828 | // argument. | ||||||
6829 | if (R->isImageType() || R->isPipeType()) { | ||||||
6830 | Se.Diag(NewVD->getLocation(), | ||||||
6831 | diag::err_opencl_type_can_only_be_used_as_function_parameter) | ||||||
6832 | << R; | ||||||
6833 | NewVD->setInvalidDecl(); | ||||||
6834 | return false; | ||||||
6835 | } | ||||||
6836 | |||||||
6837 | // OpenCL v1.2 s6.9.r: | ||||||
6838 | // The event type cannot be used to declare a program scope variable. | ||||||
6839 | // OpenCL v2.0 s6.9.q: | ||||||
6840 | // The clk_event_t and reserve_id_t types cannot be declared in program | ||||||
6841 | // scope. | ||||||
6842 | if (NewVD->hasGlobalStorage() && !NewVD->isStaticLocal()) { | ||||||
6843 | if (R->isReserveIDT() || R->isClkEventT() || R->isEventT()) { | ||||||
6844 | Se.Diag(NewVD->getLocation(), | ||||||
6845 | diag::err_invalid_type_for_program_scope_var) | ||||||
6846 | << R; | ||||||
6847 | NewVD->setInvalidDecl(); | ||||||
6848 | return false; | ||||||
6849 | } | ||||||
6850 | } | ||||||
6851 | |||||||
6852 | // OpenCL v1.0 s6.8.a.3: Pointers to functions are not allowed. | ||||||
6853 | if (!Se.getOpenCLOptions().isAvailableOption("__cl_clang_function_pointers", | ||||||
6854 | Se.getLangOpts())) { | ||||||
6855 | QualType NR = R.getCanonicalType(); | ||||||
6856 | while (NR->isPointerType() || NR->isMemberFunctionPointerType() || | ||||||
6857 | NR->isReferenceType()) { | ||||||
6858 | if (NR->isFunctionPointerType() || NR->isMemberFunctionPointerType() || | ||||||
6859 | NR->isFunctionReferenceType()) { | ||||||
6860 | Se.Diag(NewVD->getLocation(), diag::err_opencl_function_pointer) | ||||||
6861 | << NR->isReferenceType(); | ||||||
6862 | NewVD->setInvalidDecl(); | ||||||
6863 | return false; | ||||||
6864 | } | ||||||
6865 | NR = NR->getPointeeType(); | ||||||
6866 | } | ||||||
6867 | } | ||||||
6868 | |||||||
6869 | if (!Se.getOpenCLOptions().isAvailableOption("cl_khr_fp16", | ||||||
6870 | Se.getLangOpts())) { | ||||||
6871 | // OpenCL v1.2 s6.1.1.1: reject declaring variables of the half and | ||||||
6872 | // half array type (unless the cl_khr_fp16 extension is enabled). | ||||||
6873 | if (Se.Context.getBaseElementType(R)->isHalfType()) { | ||||||
6874 | Se.Diag(NewVD->getLocation(), diag::err_opencl_half_declaration) << R; | ||||||
6875 | NewVD->setInvalidDecl(); | ||||||
6876 | return false; | ||||||
6877 | } | ||||||
6878 | } | ||||||
6879 | |||||||
6880 | // OpenCL v1.2 s6.9.r: | ||||||
6881 | // The event type cannot be used with the __local, __constant and __global | ||||||
6882 | // address space qualifiers. | ||||||
6883 | if (R->isEventT()) { | ||||||
6884 | if (R.getAddressSpace() != LangAS::opencl_private) { | ||||||
6885 | Se.Diag(NewVD->getBeginLoc(), diag::err_event_t_addr_space_qual); | ||||||
6886 | NewVD->setInvalidDecl(); | ||||||
6887 | return false; | ||||||
6888 | } | ||||||
6889 | } | ||||||
6890 | |||||||
6891 | if (R->isSamplerT()) { | ||||||
6892 | // OpenCL v1.2 s6.9.b p4: | ||||||
6893 | // The sampler type cannot be used with the __local and __global address | ||||||
6894 | // space qualifiers. | ||||||
6895 | if (R.getAddressSpace() == LangAS::opencl_local || | ||||||
6896 | R.getAddressSpace() == LangAS::opencl_global) { | ||||||
6897 | Se.Diag(NewVD->getLocation(), diag::err_wrong_sampler_addressspace); | ||||||
6898 | NewVD->setInvalidDecl(); | ||||||
6899 | } | ||||||
6900 | |||||||
6901 | // OpenCL v1.2 s6.12.14.1: | ||||||
6902 | // A global sampler must be declared with either the constant address | ||||||
6903 | // space qualifier or with the const qualifier. | ||||||
6904 | if (DC->isTranslationUnit() && | ||||||
6905 | !(R.getAddressSpace() == LangAS::opencl_constant || | ||||||
6906 | R.isConstQualified())) { | ||||||
6907 | Se.Diag(NewVD->getLocation(), diag::err_opencl_nonconst_global_sampler); | ||||||
6908 | NewVD->setInvalidDecl(); | ||||||
6909 | } | ||||||
6910 | if (NewVD->isInvalidDecl()) | ||||||
6911 | return false; | ||||||
6912 | } | ||||||
6913 | |||||||
6914 | return true; | ||||||
6915 | } | ||||||
6916 | |||||||
6917 | template <typename AttrTy> | ||||||
6918 | static void copyAttrFromTypedefToDecl(Sema &S, Decl *D, const TypedefType *TT) { | ||||||
6919 | const TypedefNameDecl *TND = TT->getDecl(); | ||||||
6920 | if (const auto *Attribute = TND->getAttr<AttrTy>()) { | ||||||
6921 | AttrTy *Clone = Attribute->clone(S.Context); | ||||||
6922 | Clone->setInherited(true); | ||||||
6923 | D->addAttr(Clone); | ||||||
6924 | } | ||||||
6925 | } | ||||||
6926 | |||||||
6927 | NamedDecl *Sema::ActOnVariableDeclarator( | ||||||
6928 | Scope *S, Declarator &D, DeclContext *DC, TypeSourceInfo *TInfo, | ||||||
6929 | LookupResult &Previous, MultiTemplateParamsArg TemplateParamLists, | ||||||
6930 | bool &AddToScope, ArrayRef<BindingDecl *> Bindings) { | ||||||
6931 | QualType R = TInfo->getType(); | ||||||
6932 | DeclarationName Name = GetNameForDeclarator(D).getName(); | ||||||
6933 | |||||||
6934 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | ||||||
6935 | |||||||
6936 | if (D.isDecompositionDeclarator()) { | ||||||
6937 | // Take the name of the first declarator as our name for diagnostic | ||||||
6938 | // purposes. | ||||||
6939 | auto &Decomp = D.getDecompositionDeclarator(); | ||||||
6940 | if (!Decomp.bindings().empty()) { | ||||||
6941 | II = Decomp.bindings()[0].Name; | ||||||
6942 | Name = II; | ||||||
6943 | } | ||||||
6944 | } else if (!II) { | ||||||
6945 | Diag(D.getIdentifierLoc(), diag::err_bad_variable_name) << Name; | ||||||
6946 | return nullptr; | ||||||
6947 | } | ||||||
6948 | |||||||
6949 | |||||||
6950 | DeclSpec::SCS SCSpec = D.getDeclSpec().getStorageClassSpec(); | ||||||
6951 | StorageClass SC = StorageClassSpecToVarDeclStorageClass(D.getDeclSpec()); | ||||||
6952 | |||||||
6953 | // dllimport globals without explicit storage class are treated as extern. We | ||||||
6954 | // have to change the storage class this early to get the right DeclContext. | ||||||
6955 | if (SC == SC_None && !DC->isRecord() && | ||||||
6956 | hasParsedAttr(S, D, ParsedAttr::AT_DLLImport) && | ||||||
6957 | !hasParsedAttr(S, D, ParsedAttr::AT_DLLExport)) | ||||||
6958 | SC = SC_Extern; | ||||||
6959 | |||||||
6960 | DeclContext *OriginalDC = DC; | ||||||
6961 | bool IsLocalExternDecl = SC == SC_Extern && | ||||||
6962 | adjustContextForLocalExternDecl(DC); | ||||||
6963 | |||||||
6964 | if (SCSpec == DeclSpec::SCS_mutable) { | ||||||
6965 | // mutable can only appear on non-static class members, so it's always | ||||||
6966 | // an error here | ||||||
6967 | Diag(D.getIdentifierLoc(), diag::err_mutable_nonmember); | ||||||
6968 | D.setInvalidType(); | ||||||
6969 | SC = SC_None; | ||||||
6970 | } | ||||||
6971 | |||||||
6972 | if (getLangOpts().CPlusPlus11 && SCSpec == DeclSpec::SCS_register && | ||||||
6973 | !D.getAsmLabel() && !getSourceManager().isInSystemMacro( | ||||||
6974 | D.getDeclSpec().getStorageClassSpecLoc())) { | ||||||
6975 | // In C++11, the 'register' storage class specifier is deprecated. | ||||||
6976 | // Suppress the warning in system macros, it's used in macros in some | ||||||
6977 | // popular C system headers, such as in glibc's htonl() macro. | ||||||
6978 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
6979 | getLangOpts().CPlusPlus17 ? diag::ext_register_storage_class | ||||||
6980 | : diag::warn_deprecated_register) | ||||||
6981 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
6982 | } | ||||||
6983 | |||||||
6984 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
6985 | |||||||
6986 | if (!DC->isRecord() && S->getFnParent() == nullptr) { | ||||||
6987 | // C99 6.9p2: The storage-class specifiers auto and register shall not | ||||||
6988 | // appear in the declaration specifiers in an external declaration. | ||||||
6989 | // Global Register+Asm is a GNU extension we support. | ||||||
6990 | if (SC == SC_Auto || (SC == SC_Register && !D.getAsmLabel())) { | ||||||
6991 | Diag(D.getIdentifierLoc(), diag::err_typecheck_sclass_fscope); | ||||||
6992 | D.setInvalidType(); | ||||||
6993 | } | ||||||
6994 | } | ||||||
6995 | |||||||
6996 | // If this variable has a VLA type and an initializer, try to | ||||||
6997 | // fold to a constant-sized type. This is otherwise invalid. | ||||||
6998 | if (D.hasInitializer() && R->isVariableArrayType()) | ||||||
6999 | tryToFixVariablyModifiedVarType(TInfo, R, D.getIdentifierLoc(), | ||||||
7000 | /*DiagID=*/0); | ||||||
7001 | |||||||
7002 | bool IsMemberSpecialization = false; | ||||||
7003 | bool IsVariableTemplateSpecialization = false; | ||||||
7004 | bool IsPartialSpecialization = false; | ||||||
7005 | bool IsVariableTemplate = false; | ||||||
7006 | VarDecl *NewVD = nullptr; | ||||||
7007 | VarTemplateDecl *NewTemplate = nullptr; | ||||||
7008 | TemplateParameterList *TemplateParams = nullptr; | ||||||
7009 | if (!getLangOpts().CPlusPlus) { | ||||||
7010 | NewVD = VarDecl::Create(Context, DC, D.getBeginLoc(), D.getIdentifierLoc(), | ||||||
7011 | II, R, TInfo, SC); | ||||||
7012 | |||||||
7013 | if (R->getContainedDeducedType()) | ||||||
7014 | ParsingInitForAutoVars.insert(NewVD); | ||||||
7015 | |||||||
7016 | if (D.isInvalidType()) | ||||||
7017 | NewVD->setInvalidDecl(); | ||||||
7018 | |||||||
7019 | if (NewVD->getType().hasNonTrivialToPrimitiveDestructCUnion() && | ||||||
7020 | NewVD->hasLocalStorage()) | ||||||
7021 | checkNonTrivialCUnion(NewVD->getType(), NewVD->getLocation(), | ||||||
7022 | NTCUC_AutoVar, NTCUK_Destruct); | ||||||
7023 | } else { | ||||||
7024 | bool Invalid = false; | ||||||
7025 | |||||||
7026 | if (DC->isRecord() && !CurContext->isRecord()) { | ||||||
7027 | // This is an out-of-line definition of a static data member. | ||||||
7028 | switch (SC) { | ||||||
7029 | case SC_None: | ||||||
7030 | break; | ||||||
7031 | case SC_Static: | ||||||
7032 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
7033 | diag::err_static_out_of_line) | ||||||
7034 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
7035 | break; | ||||||
7036 | case SC_Auto: | ||||||
7037 | case SC_Register: | ||||||
7038 | case SC_Extern: | ||||||
7039 | // [dcl.stc] p2: The auto or register specifiers shall be applied only | ||||||
7040 | // to names of variables declared in a block or to function parameters. | ||||||
7041 | // [dcl.stc] p6: The extern specifier cannot be used in the declaration | ||||||
7042 | // of class members | ||||||
7043 | |||||||
7044 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
7045 | diag::err_storage_class_for_static_member) | ||||||
7046 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
7047 | break; | ||||||
7048 | case SC_PrivateExtern: | ||||||
7049 | llvm_unreachable("C storage class in c++!")::llvm::llvm_unreachable_internal("C storage class in c++!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7049); | ||||||
7050 | } | ||||||
7051 | } | ||||||
7052 | |||||||
7053 | if (SC == SC_Static && CurContext->isRecord()) { | ||||||
7054 | if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(DC)) { | ||||||
7055 | // Walk up the enclosing DeclContexts to check for any that are | ||||||
7056 | // incompatible with static data members. | ||||||
7057 | const DeclContext *FunctionOrMethod = nullptr; | ||||||
7058 | const CXXRecordDecl *AnonStruct = nullptr; | ||||||
7059 | for (DeclContext *Ctxt = DC; Ctxt; Ctxt = Ctxt->getParent()) { | ||||||
7060 | if (Ctxt->isFunctionOrMethod()) { | ||||||
7061 | FunctionOrMethod = Ctxt; | ||||||
7062 | break; | ||||||
7063 | } | ||||||
7064 | const CXXRecordDecl *ParentDecl = dyn_cast<CXXRecordDecl>(Ctxt); | ||||||
7065 | if (ParentDecl && !ParentDecl->getDeclName()) { | ||||||
7066 | AnonStruct = ParentDecl; | ||||||
7067 | break; | ||||||
7068 | } | ||||||
7069 | } | ||||||
7070 | if (FunctionOrMethod) { | ||||||
7071 | // C++ [class.static.data]p5: A local class shall not have static data | ||||||
7072 | // members. | ||||||
7073 | Diag(D.getIdentifierLoc(), | ||||||
7074 | diag::err_static_data_member_not_allowed_in_local_class) | ||||||
7075 | << Name << RD->getDeclName() << RD->getTagKind(); | ||||||
7076 | } else if (AnonStruct) { | ||||||
7077 | // C++ [class.static.data]p4: Unnamed classes and classes contained | ||||||
7078 | // directly or indirectly within unnamed classes shall not contain | ||||||
7079 | // static data members. | ||||||
7080 | Diag(D.getIdentifierLoc(), | ||||||
7081 | diag::err_static_data_member_not_allowed_in_anon_struct) | ||||||
7082 | << Name << AnonStruct->getTagKind(); | ||||||
7083 | Invalid = true; | ||||||
7084 | } else if (RD->isUnion()) { | ||||||
7085 | // C++98 [class.union]p1: If a union contains a static data member, | ||||||
7086 | // the program is ill-formed. C++11 drops this restriction. | ||||||
7087 | Diag(D.getIdentifierLoc(), | ||||||
7088 | getLangOpts().CPlusPlus11 | ||||||
7089 | ? diag::warn_cxx98_compat_static_data_member_in_union | ||||||
7090 | : diag::ext_static_data_member_in_union) << Name; | ||||||
7091 | } | ||||||
7092 | } | ||||||
7093 | } | ||||||
7094 | |||||||
7095 | // Match up the template parameter lists with the scope specifier, then | ||||||
7096 | // determine whether we have a template or a template specialization. | ||||||
7097 | bool InvalidScope = false; | ||||||
7098 | TemplateParams = MatchTemplateParametersToScopeSpecifier( | ||||||
7099 | D.getDeclSpec().getBeginLoc(), D.getIdentifierLoc(), | ||||||
7100 | D.getCXXScopeSpec(), | ||||||
7101 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId | ||||||
7102 | ? D.getName().TemplateId | ||||||
7103 | : nullptr, | ||||||
7104 | TemplateParamLists, | ||||||
7105 | /*never a friend*/ false, IsMemberSpecialization, InvalidScope); | ||||||
7106 | Invalid |= InvalidScope; | ||||||
7107 | |||||||
7108 | if (TemplateParams) { | ||||||
7109 | if (!TemplateParams->size() && | ||||||
7110 | D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) { | ||||||
7111 | // There is an extraneous 'template<>' for this variable. Complain | ||||||
7112 | // about it, but allow the declaration of the variable. | ||||||
7113 | Diag(TemplateParams->getTemplateLoc(), | ||||||
7114 | diag::err_template_variable_noparams) | ||||||
7115 | << II | ||||||
7116 | << SourceRange(TemplateParams->getTemplateLoc(), | ||||||
7117 | TemplateParams->getRAngleLoc()); | ||||||
7118 | TemplateParams = nullptr; | ||||||
7119 | } else { | ||||||
7120 | // Check that we can declare a template here. | ||||||
7121 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||||
7122 | return nullptr; | ||||||
7123 | |||||||
7124 | if (D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId) { | ||||||
7125 | // This is an explicit specialization or a partial specialization. | ||||||
7126 | IsVariableTemplateSpecialization = true; | ||||||
7127 | IsPartialSpecialization = TemplateParams->size() > 0; | ||||||
7128 | } else { // if (TemplateParams->size() > 0) | ||||||
7129 | // This is a template declaration. | ||||||
7130 | IsVariableTemplate = true; | ||||||
7131 | |||||||
7132 | // Only C++1y supports variable templates (N3651). | ||||||
7133 | Diag(D.getIdentifierLoc(), | ||||||
7134 | getLangOpts().CPlusPlus14 | ||||||
7135 | ? diag::warn_cxx11_compat_variable_template | ||||||
7136 | : diag::ext_variable_template); | ||||||
7137 | } | ||||||
7138 | } | ||||||
7139 | } else { | ||||||
7140 | // Check that we can declare a member specialization here. | ||||||
7141 | if (!TemplateParamLists.empty() && IsMemberSpecialization && | ||||||
7142 | CheckTemplateDeclScope(S, TemplateParamLists.back())) | ||||||
7143 | return nullptr; | ||||||
7144 | assert((Invalid ||(static_cast <bool> ((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7146, __extension__ __PRETTY_FUNCTION__)) | ||||||
7145 | D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) &&(static_cast <bool> ((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7146, __extension__ __PRETTY_FUNCTION__)) | ||||||
7146 | "should have a 'template<>' for this decl")(static_cast <bool> ((Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(Invalid || D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7146, __extension__ __PRETTY_FUNCTION__)); | ||||||
7147 | } | ||||||
7148 | |||||||
7149 | if (IsVariableTemplateSpecialization) { | ||||||
7150 | SourceLocation TemplateKWLoc = | ||||||
7151 | TemplateParamLists.size() > 0 | ||||||
7152 | ? TemplateParamLists[0]->getTemplateLoc() | ||||||
7153 | : SourceLocation(); | ||||||
7154 | DeclResult Res = ActOnVarTemplateSpecialization( | ||||||
7155 | S, D, TInfo, TemplateKWLoc, TemplateParams, SC, | ||||||
7156 | IsPartialSpecialization); | ||||||
7157 | if (Res.isInvalid()) | ||||||
7158 | return nullptr; | ||||||
7159 | NewVD = cast<VarDecl>(Res.get()); | ||||||
7160 | AddToScope = false; | ||||||
7161 | } else if (D.isDecompositionDeclarator()) { | ||||||
7162 | NewVD = DecompositionDecl::Create(Context, DC, D.getBeginLoc(), | ||||||
7163 | D.getIdentifierLoc(), R, TInfo, SC, | ||||||
7164 | Bindings); | ||||||
7165 | } else | ||||||
7166 | NewVD = VarDecl::Create(Context, DC, D.getBeginLoc(), | ||||||
7167 | D.getIdentifierLoc(), II, R, TInfo, SC); | ||||||
7168 | |||||||
7169 | // If this is supposed to be a variable template, create it as such. | ||||||
7170 | if (IsVariableTemplate) { | ||||||
7171 | NewTemplate = | ||||||
7172 | VarTemplateDecl::Create(Context, DC, D.getIdentifierLoc(), Name, | ||||||
7173 | TemplateParams, NewVD); | ||||||
7174 | NewVD->setDescribedVarTemplate(NewTemplate); | ||||||
7175 | } | ||||||
7176 | |||||||
7177 | // If this decl has an auto type in need of deduction, make a note of the | ||||||
7178 | // Decl so we can diagnose uses of it in its own initializer. | ||||||
7179 | if (R->getContainedDeducedType()) | ||||||
7180 | ParsingInitForAutoVars.insert(NewVD); | ||||||
7181 | |||||||
7182 | if (D.isInvalidType() || Invalid) { | ||||||
7183 | NewVD->setInvalidDecl(); | ||||||
7184 | if (NewTemplate) | ||||||
7185 | NewTemplate->setInvalidDecl(); | ||||||
7186 | } | ||||||
7187 | |||||||
7188 | SetNestedNameSpecifier(*this, NewVD, D); | ||||||
7189 | |||||||
7190 | // If we have any template parameter lists that don't directly belong to | ||||||
7191 | // the variable (matching the scope specifier), store them. | ||||||
7192 | unsigned VDTemplateParamLists = TemplateParams ? 1 : 0; | ||||||
7193 | if (TemplateParamLists.size() > VDTemplateParamLists) | ||||||
7194 | NewVD->setTemplateParameterListsInfo( | ||||||
7195 | Context, TemplateParamLists.drop_back(VDTemplateParamLists)); | ||||||
7196 | } | ||||||
7197 | |||||||
7198 | if (D.getDeclSpec().isInlineSpecified()) { | ||||||
7199 | if (!getLangOpts().CPlusPlus) { | ||||||
7200 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
7201 | << 0; | ||||||
7202 | } else if (CurContext->isFunctionOrMethod()) { | ||||||
7203 | // 'inline' is not allowed on block scope variable declaration. | ||||||
7204 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
7205 | diag::err_inline_declaration_block_scope) << Name | ||||||
7206 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); | ||||||
7207 | } else { | ||||||
7208 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
7209 | getLangOpts().CPlusPlus17 ? diag::warn_cxx14_compat_inline_variable | ||||||
7210 | : diag::ext_inline_variable); | ||||||
7211 | NewVD->setInlineSpecified(); | ||||||
7212 | } | ||||||
7213 | } | ||||||
7214 | |||||||
7215 | // Set the lexical context. If the declarator has a C++ scope specifier, the | ||||||
7216 | // lexical context will be different from the semantic context. | ||||||
7217 | NewVD->setLexicalDeclContext(CurContext); | ||||||
7218 | if (NewTemplate) | ||||||
7219 | NewTemplate->setLexicalDeclContext(CurContext); | ||||||
7220 | |||||||
7221 | if (IsLocalExternDecl) { | ||||||
7222 | if (D.isDecompositionDeclarator()) | ||||||
7223 | for (auto *B : Bindings) | ||||||
7224 | B->setLocalExternDecl(); | ||||||
7225 | else | ||||||
7226 | NewVD->setLocalExternDecl(); | ||||||
7227 | } | ||||||
7228 | |||||||
7229 | bool EmitTLSUnsupportedError = false; | ||||||
7230 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) { | ||||||
7231 | // C++11 [dcl.stc]p4: | ||||||
7232 | // When thread_local is applied to a variable of block scope the | ||||||
7233 | // storage-class-specifier static is implied if it does not appear | ||||||
7234 | // explicitly. | ||||||
7235 | // Core issue: 'static' is not implied if the variable is declared | ||||||
7236 | // 'extern'. | ||||||
7237 | if (NewVD->hasLocalStorage() && | ||||||
7238 | (SCSpec != DeclSpec::SCS_unspecified || | ||||||
7239 | TSCS != DeclSpec::TSCS_thread_local || | ||||||
7240 | !DC->isFunctionOrMethod())) | ||||||
7241 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7242 | diag::err_thread_non_global) | ||||||
7243 | << DeclSpec::getSpecifierName(TSCS); | ||||||
7244 | else if (!Context.getTargetInfo().isTLSSupported()) { | ||||||
7245 | if (getLangOpts().CUDA || getLangOpts().OpenMPIsDevice || | ||||||
7246 | getLangOpts().SYCLIsDevice) { | ||||||
7247 | // Postpone error emission until we've collected attributes required to | ||||||
7248 | // figure out whether it's a host or device variable and whether the | ||||||
7249 | // error should be ignored. | ||||||
7250 | EmitTLSUnsupportedError = true; | ||||||
7251 | // We still need to mark the variable as TLS so it shows up in AST with | ||||||
7252 | // proper storage class for other tools to use even if we're not going | ||||||
7253 | // to emit any code for it. | ||||||
7254 | NewVD->setTSCSpec(TSCS); | ||||||
7255 | } else | ||||||
7256 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7257 | diag::err_thread_unsupported); | ||||||
7258 | } else | ||||||
7259 | NewVD->setTSCSpec(TSCS); | ||||||
7260 | } | ||||||
7261 | |||||||
7262 | switch (D.getDeclSpec().getConstexprSpecifier()) { | ||||||
7263 | case ConstexprSpecKind::Unspecified: | ||||||
7264 | break; | ||||||
7265 | |||||||
7266 | case ConstexprSpecKind::Consteval: | ||||||
7267 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7268 | diag::err_constexpr_wrong_decl_kind) | ||||||
7269 | << static_cast<int>(D.getDeclSpec().getConstexprSpecifier()); | ||||||
7270 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
7271 | |||||||
7272 | case ConstexprSpecKind::Constexpr: | ||||||
7273 | NewVD->setConstexpr(true); | ||||||
7274 | // C++1z [dcl.spec.constexpr]p1: | ||||||
7275 | // A static data member declared with the constexpr specifier is | ||||||
7276 | // implicitly an inline variable. | ||||||
7277 | if (NewVD->isStaticDataMember() && | ||||||
7278 | (getLangOpts().CPlusPlus17 || | ||||||
7279 | Context.getTargetInfo().getCXXABI().isMicrosoft())) | ||||||
7280 | NewVD->setImplicitlyInline(); | ||||||
7281 | break; | ||||||
7282 | |||||||
7283 | case ConstexprSpecKind::Constinit: | ||||||
7284 | if (!NewVD->hasGlobalStorage()) | ||||||
7285 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7286 | diag::err_constinit_local_variable); | ||||||
7287 | else | ||||||
7288 | NewVD->addAttr(ConstInitAttr::Create( | ||||||
7289 | Context, D.getDeclSpec().getConstexprSpecLoc(), | ||||||
7290 | AttributeCommonInfo::AS_Keyword, ConstInitAttr::Keyword_constinit)); | ||||||
7291 | break; | ||||||
7292 | } | ||||||
7293 | |||||||
7294 | // C99 6.7.4p3 | ||||||
7295 | // An inline definition of a function with external linkage shall | ||||||
7296 | // not contain a definition of a modifiable object with static or | ||||||
7297 | // thread storage duration... | ||||||
7298 | // We only apply this when the function is required to be defined | ||||||
7299 | // elsewhere, i.e. when the function is not 'extern inline'. Note | ||||||
7300 | // that a local variable with thread storage duration still has to | ||||||
7301 | // be marked 'static'. Also note that it's possible to get these | ||||||
7302 | // semantics in C++ using __attribute__((gnu_inline)). | ||||||
7303 | if (SC == SC_Static && S->getFnParent() != nullptr && | ||||||
7304 | !NewVD->getType().isConstQualified()) { | ||||||
7305 | FunctionDecl *CurFD = getCurFunctionDecl(); | ||||||
7306 | if (CurFD && isFunctionDefinitionDiscarded(*this, CurFD)) { | ||||||
7307 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
7308 | diag::warn_static_local_in_extern_inline); | ||||||
7309 | MaybeSuggestAddingStaticToDecl(CurFD); | ||||||
7310 | } | ||||||
7311 | } | ||||||
7312 | |||||||
7313 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
7314 | if (IsVariableTemplateSpecialization) | ||||||
7315 | Diag(NewVD->getLocation(), diag::err_module_private_specialization) | ||||||
7316 | << (IsPartialSpecialization ? 1 : 0) | ||||||
7317 | << FixItHint::CreateRemoval( | ||||||
7318 | D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7319 | else if (IsMemberSpecialization) | ||||||
7320 | Diag(NewVD->getLocation(), diag::err_module_private_specialization) | ||||||
7321 | << 2 | ||||||
7322 | << FixItHint::CreateRemoval(D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7323 | else if (NewVD->hasLocalStorage()) | ||||||
7324 | Diag(NewVD->getLocation(), diag::err_module_private_local) | ||||||
7325 | << 0 << NewVD | ||||||
7326 | << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
7327 | << FixItHint::CreateRemoval( | ||||||
7328 | D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
7329 | else { | ||||||
7330 | NewVD->setModulePrivate(); | ||||||
7331 | if (NewTemplate) | ||||||
7332 | NewTemplate->setModulePrivate(); | ||||||
7333 | for (auto *B : Bindings) | ||||||
7334 | B->setModulePrivate(); | ||||||
7335 | } | ||||||
7336 | } | ||||||
7337 | |||||||
7338 | if (getLangOpts().OpenCL) { | ||||||
7339 | deduceOpenCLAddressSpace(NewVD); | ||||||
7340 | |||||||
7341 | DeclSpec::TSCS TSC = D.getDeclSpec().getThreadStorageClassSpec(); | ||||||
7342 | if (TSC != TSCS_unspecified) { | ||||||
7343 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7344 | diag::err_opencl_unknown_type_specifier) | ||||||
7345 | << getLangOpts().getOpenCLVersionString() | ||||||
7346 | << DeclSpec::getSpecifierName(TSC) << 1; | ||||||
7347 | NewVD->setInvalidDecl(); | ||||||
7348 | } | ||||||
7349 | } | ||||||
7350 | |||||||
7351 | // Handle attributes prior to checking for duplicates in MergeVarDecl | ||||||
7352 | ProcessDeclAttributes(S, NewVD, D); | ||||||
7353 | |||||||
7354 | // FIXME: This is probably the wrong location to be doing this and we should | ||||||
7355 | // probably be doing this for more attributes (especially for function | ||||||
7356 | // pointer attributes such as format, warn_unused_result, etc.). Ideally | ||||||
7357 | // the code to copy attributes would be generated by TableGen. | ||||||
7358 | if (R->isFunctionPointerType()) | ||||||
7359 | if (const auto *TT = R->getAs<TypedefType>()) | ||||||
7360 | copyAttrFromTypedefToDecl<AllocSizeAttr>(*this, NewVD, TT); | ||||||
7361 | |||||||
7362 | if (getLangOpts().CUDA || getLangOpts().OpenMPIsDevice || | ||||||
7363 | getLangOpts().SYCLIsDevice) { | ||||||
7364 | if (EmitTLSUnsupportedError && | ||||||
7365 | ((getLangOpts().CUDA && DeclAttrsMatchCUDAMode(getLangOpts(), NewVD)) || | ||||||
7366 | (getLangOpts().OpenMPIsDevice && | ||||||
7367 | OMPDeclareTargetDeclAttr::isDeclareTargetDeclaration(NewVD)))) | ||||||
7368 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
7369 | diag::err_thread_unsupported); | ||||||
7370 | |||||||
7371 | if (EmitTLSUnsupportedError && | ||||||
7372 | (LangOpts.SYCLIsDevice || (LangOpts.OpenMP && LangOpts.OpenMPIsDevice))) | ||||||
7373 | targetDiag(D.getIdentifierLoc(), diag::err_thread_unsupported); | ||||||
7374 | // CUDA B.2.5: "__shared__ and __constant__ variables have implied static | ||||||
7375 | // storage [duration]." | ||||||
7376 | if (SC == SC_None && S->getFnParent() != nullptr && | ||||||
7377 | (NewVD->hasAttr<CUDASharedAttr>() || | ||||||
7378 | NewVD->hasAttr<CUDAConstantAttr>())) { | ||||||
7379 | NewVD->setStorageClass(SC_Static); | ||||||
7380 | } | ||||||
7381 | } | ||||||
7382 | |||||||
7383 | // Ensure that dllimport globals without explicit storage class are treated as | ||||||
7384 | // extern. The storage class is set above using parsed attributes. Now we can | ||||||
7385 | // check the VarDecl itself. | ||||||
7386 | assert(!NewVD->hasAttr<DLLImportAttr>() ||(static_cast <bool> (!NewVD->hasAttr<DLLImportAttr >() || NewVD->getAttr<DLLImportAttr>()->isInherited () || NewVD->isStaticDataMember() || NewVD->getStorageClass () != SC_None) ? void (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7388, __extension__ __PRETTY_FUNCTION__)) | ||||||
7387 | NewVD->getAttr<DLLImportAttr>()->isInherited() ||(static_cast <bool> (!NewVD->hasAttr<DLLImportAttr >() || NewVD->getAttr<DLLImportAttr>()->isInherited () || NewVD->isStaticDataMember() || NewVD->getStorageClass () != SC_None) ? void (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7388, __extension__ __PRETTY_FUNCTION__)) | ||||||
7388 | NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None)(static_cast <bool> (!NewVD->hasAttr<DLLImportAttr >() || NewVD->getAttr<DLLImportAttr>()->isInherited () || NewVD->isStaticDataMember() || NewVD->getStorageClass () != SC_None) ? void (0) : __assert_fail ("!NewVD->hasAttr<DLLImportAttr>() || NewVD->getAttr<DLLImportAttr>()->isInherited() || NewVD->isStaticDataMember() || NewVD->getStorageClass() != SC_None" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7388, __extension__ __PRETTY_FUNCTION__)); | ||||||
7389 | |||||||
7390 | // In auto-retain/release, infer strong retension for variables of | ||||||
7391 | // retainable type. | ||||||
7392 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewVD)) | ||||||
7393 | NewVD->setInvalidDecl(); | ||||||
7394 | |||||||
7395 | // Handle GNU asm-label extension (encoded as an attribute). | ||||||
7396 | if (Expr *E = (Expr*)D.getAsmLabel()) { | ||||||
7397 | // The parser guarantees this is a string. | ||||||
7398 | StringLiteral *SE = cast<StringLiteral>(E); | ||||||
7399 | StringRef Label = SE->getString(); | ||||||
7400 | if (S->getFnParent() != nullptr) { | ||||||
7401 | switch (SC) { | ||||||
7402 | case SC_None: | ||||||
7403 | case SC_Auto: | ||||||
7404 | Diag(E->getExprLoc(), diag::warn_asm_label_on_auto_decl) << Label; | ||||||
7405 | break; | ||||||
7406 | case SC_Register: | ||||||
7407 | // Local Named register | ||||||
7408 | if (!Context.getTargetInfo().isValidGCCRegisterName(Label) && | ||||||
7409 | DeclAttrsMatchCUDAMode(getLangOpts(), getCurFunctionDecl())) | ||||||
7410 | Diag(E->getExprLoc(), diag::err_asm_unknown_register_name) << Label; | ||||||
7411 | break; | ||||||
7412 | case SC_Static: | ||||||
7413 | case SC_Extern: | ||||||
7414 | case SC_PrivateExtern: | ||||||
7415 | break; | ||||||
7416 | } | ||||||
7417 | } else if (SC == SC_Register) { | ||||||
7418 | // Global Named register | ||||||
7419 | if (DeclAttrsMatchCUDAMode(getLangOpts(), NewVD)) { | ||||||
7420 | const auto &TI = Context.getTargetInfo(); | ||||||
7421 | bool HasSizeMismatch; | ||||||
7422 | |||||||
7423 | if (!TI.isValidGCCRegisterName(Label)) | ||||||
7424 | Diag(E->getExprLoc(), diag::err_asm_unknown_register_name) << Label; | ||||||
7425 | else if (!TI.validateGlobalRegisterVariable(Label, | ||||||
7426 | Context.getTypeSize(R), | ||||||
7427 | HasSizeMismatch)) | ||||||
7428 | Diag(E->getExprLoc(), diag::err_asm_invalid_global_var_reg) << Label; | ||||||
7429 | else if (HasSizeMismatch) | ||||||
7430 | Diag(E->getExprLoc(), diag::err_asm_register_size_mismatch) << Label; | ||||||
7431 | } | ||||||
7432 | |||||||
7433 | if (!R->isIntegralType(Context) && !R->isPointerType()) { | ||||||
7434 | Diag(D.getBeginLoc(), diag::err_asm_bad_register_type); | ||||||
7435 | NewVD->setInvalidDecl(true); | ||||||
7436 | } | ||||||
7437 | } | ||||||
7438 | |||||||
7439 | NewVD->addAttr(AsmLabelAttr::Create(Context, Label, | ||||||
7440 | /*IsLiteralLabel=*/true, | ||||||
7441 | SE->getStrTokenLoc(0))); | ||||||
7442 | } else if (!ExtnameUndeclaredIdentifiers.empty()) { | ||||||
7443 | llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*>::iterator I = | ||||||
7444 | ExtnameUndeclaredIdentifiers.find(NewVD->getIdentifier()); | ||||||
7445 | if (I != ExtnameUndeclaredIdentifiers.end()) { | ||||||
7446 | if (isDeclExternC(NewVD)) { | ||||||
7447 | NewVD->addAttr(I->second); | ||||||
7448 | ExtnameUndeclaredIdentifiers.erase(I); | ||||||
7449 | } else | ||||||
7450 | Diag(NewVD->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
7451 | << /*Variable*/1 << NewVD; | ||||||
7452 | } | ||||||
7453 | } | ||||||
7454 | |||||||
7455 | // Find the shadowed declaration before filtering for scope. | ||||||
7456 | NamedDecl *ShadowedDecl = D.getCXXScopeSpec().isEmpty() | ||||||
7457 | ? getShadowedDeclaration(NewVD, Previous) | ||||||
7458 | : nullptr; | ||||||
7459 | |||||||
7460 | // Don't consider existing declarations that are in a different | ||||||
7461 | // scope and are out-of-semantic-context declarations (if the new | ||||||
7462 | // declaration has linkage). | ||||||
7463 | FilterLookupForScope(Previous, OriginalDC, S, shouldConsiderLinkage(NewVD), | ||||||
7464 | D.getCXXScopeSpec().isNotEmpty() || | ||||||
7465 | IsMemberSpecialization || | ||||||
7466 | IsVariableTemplateSpecialization); | ||||||
7467 | |||||||
7468 | // Check whether the previous declaration is in the same block scope. This | ||||||
7469 | // affects whether we merge types with it, per C++11 [dcl.array]p3. | ||||||
7470 | if (getLangOpts().CPlusPlus && | ||||||
7471 | NewVD->isLocalVarDecl() && NewVD->hasExternalStorage()) | ||||||
7472 | NewVD->setPreviousDeclInSameBlockScope( | ||||||
7473 | Previous.isSingleResult() && !Previous.isShadowed() && | ||||||
7474 | isDeclInScope(Previous.getFoundDecl(), OriginalDC, S, false)); | ||||||
7475 | |||||||
7476 | if (!getLangOpts().CPlusPlus) { | ||||||
7477 | D.setRedeclaration(CheckVariableDeclaration(NewVD, Previous)); | ||||||
7478 | } else { | ||||||
7479 | // If this is an explicit specialization of a static data member, check it. | ||||||
7480 | if (IsMemberSpecialization && !NewVD->isInvalidDecl() && | ||||||
7481 | CheckMemberSpecialization(NewVD, Previous)) | ||||||
7482 | NewVD->setInvalidDecl(); | ||||||
7483 | |||||||
7484 | // Merge the decl with the existing one if appropriate. | ||||||
7485 | if (!Previous.empty()) { | ||||||
7486 | if (Previous.isSingleResult() && | ||||||
7487 | isa<FieldDecl>(Previous.getFoundDecl()) && | ||||||
7488 | D.getCXXScopeSpec().isSet()) { | ||||||
7489 | // The user tried to define a non-static data member | ||||||
7490 | // out-of-line (C++ [dcl.meaning]p1). | ||||||
7491 | Diag(NewVD->getLocation(), diag::err_nonstatic_member_out_of_line) | ||||||
7492 | << D.getCXXScopeSpec().getRange(); | ||||||
7493 | Previous.clear(); | ||||||
7494 | NewVD->setInvalidDecl(); | ||||||
7495 | } | ||||||
7496 | } else if (D.getCXXScopeSpec().isSet()) { | ||||||
7497 | // No previous declaration in the qualifying scope. | ||||||
7498 | Diag(D.getIdentifierLoc(), diag::err_no_member) | ||||||
7499 | << Name << computeDeclContext(D.getCXXScopeSpec(), true) | ||||||
7500 | << D.getCXXScopeSpec().getRange(); | ||||||
7501 | NewVD->setInvalidDecl(); | ||||||
7502 | } | ||||||
7503 | |||||||
7504 | if (!IsVariableTemplateSpecialization) | ||||||
7505 | D.setRedeclaration(CheckVariableDeclaration(NewVD, Previous)); | ||||||
7506 | |||||||
7507 | if (NewTemplate) { | ||||||
7508 | VarTemplateDecl *PrevVarTemplate = | ||||||
7509 | NewVD->getPreviousDecl() | ||||||
7510 | ? NewVD->getPreviousDecl()->getDescribedVarTemplate() | ||||||
7511 | : nullptr; | ||||||
7512 | |||||||
7513 | // Check the template parameter list of this declaration, possibly | ||||||
7514 | // merging in the template parameter list from the previous variable | ||||||
7515 | // template declaration. | ||||||
7516 | if (CheckTemplateParameterList( | ||||||
7517 | TemplateParams, | ||||||
7518 | PrevVarTemplate ? PrevVarTemplate->getTemplateParameters() | ||||||
7519 | : nullptr, | ||||||
7520 | (D.getCXXScopeSpec().isSet() && DC && DC->isRecord() && | ||||||
7521 | DC->isDependentContext()) | ||||||
7522 | ? TPC_ClassTemplateMember | ||||||
7523 | : TPC_VarTemplate)) | ||||||
7524 | NewVD->setInvalidDecl(); | ||||||
7525 | |||||||
7526 | // If we are providing an explicit specialization of a static variable | ||||||
7527 | // template, make a note of that. | ||||||
7528 | if (PrevVarTemplate && | ||||||
7529 | PrevVarTemplate->getInstantiatedFromMemberTemplate()) | ||||||
7530 | PrevVarTemplate->setMemberSpecialization(); | ||||||
7531 | } | ||||||
7532 | } | ||||||
7533 | |||||||
7534 | // Diagnose shadowed variables iff this isn't a redeclaration. | ||||||
7535 | if (ShadowedDecl && !D.isRedeclaration()) | ||||||
7536 | CheckShadow(NewVD, ShadowedDecl, Previous); | ||||||
7537 | |||||||
7538 | ProcessPragmaWeak(S, NewVD); | ||||||
7539 | |||||||
7540 | // If this is the first declaration of an extern C variable, update | ||||||
7541 | // the map of such variables. | ||||||
7542 | if (NewVD->isFirstDecl() && !NewVD->isInvalidDecl() && | ||||||
7543 | isIncompleteDeclExternC(*this, NewVD)) | ||||||
7544 | RegisterLocallyScopedExternCDecl(NewVD, S); | ||||||
7545 | |||||||
7546 | if (getLangOpts().CPlusPlus && NewVD->isStaticLocal()) { | ||||||
7547 | MangleNumberingContext *MCtx; | ||||||
7548 | Decl *ManglingContextDecl; | ||||||
7549 | std::tie(MCtx, ManglingContextDecl) = | ||||||
7550 | getCurrentMangleNumberContext(NewVD->getDeclContext()); | ||||||
7551 | if (MCtx) { | ||||||
7552 | Context.setManglingNumber( | ||||||
7553 | NewVD, MCtx->getManglingNumber( | ||||||
7554 | NewVD, getMSManglingNumber(getLangOpts(), S))); | ||||||
7555 | Context.setStaticLocalNumber(NewVD, MCtx->getStaticLocalNumber(NewVD)); | ||||||
7556 | } | ||||||
7557 | } | ||||||
7558 | |||||||
7559 | // Special handling of variable named 'main'. | ||||||
7560 | if (Name.getAsIdentifierInfo() && Name.getAsIdentifierInfo()->isStr("main") && | ||||||
7561 | NewVD->getDeclContext()->getRedeclContext()->isTranslationUnit() && | ||||||
7562 | !getLangOpts().Freestanding && !NewVD->getDescribedVarTemplate()) { | ||||||
7563 | |||||||
7564 | // C++ [basic.start.main]p3 | ||||||
7565 | // A program that declares a variable main at global scope is ill-formed. | ||||||
7566 | if (getLangOpts().CPlusPlus) | ||||||
7567 | Diag(D.getBeginLoc(), diag::err_main_global_variable); | ||||||
7568 | |||||||
7569 | // In C, and external-linkage variable named main results in undefined | ||||||
7570 | // behavior. | ||||||
7571 | else if (NewVD->hasExternalFormalLinkage()) | ||||||
7572 | Diag(D.getBeginLoc(), diag::warn_main_redefined); | ||||||
7573 | } | ||||||
7574 | |||||||
7575 | if (D.isRedeclaration() && !Previous.empty()) { | ||||||
7576 | NamedDecl *Prev = Previous.getRepresentativeDecl(); | ||||||
7577 | checkDLLAttributeRedeclaration(*this, Prev, NewVD, IsMemberSpecialization, | ||||||
7578 | D.isFunctionDefinition()); | ||||||
7579 | } | ||||||
7580 | |||||||
7581 | if (NewTemplate) { | ||||||
7582 | if (NewVD->isInvalidDecl()) | ||||||
7583 | NewTemplate->setInvalidDecl(); | ||||||
7584 | ActOnDocumentableDecl(NewTemplate); | ||||||
7585 | return NewTemplate; | ||||||
7586 | } | ||||||
7587 | |||||||
7588 | if (IsMemberSpecialization && !NewVD->isInvalidDecl()) | ||||||
7589 | CompleteMemberSpecialization(NewVD, Previous); | ||||||
7590 | |||||||
7591 | return NewVD; | ||||||
7592 | } | ||||||
7593 | |||||||
7594 | /// Enum describing the %select options in diag::warn_decl_shadow. | ||||||
7595 | enum ShadowedDeclKind { | ||||||
7596 | SDK_Local, | ||||||
7597 | SDK_Global, | ||||||
7598 | SDK_StaticMember, | ||||||
7599 | SDK_Field, | ||||||
7600 | SDK_Typedef, | ||||||
7601 | SDK_Using, | ||||||
7602 | SDK_StructuredBinding | ||||||
7603 | }; | ||||||
7604 | |||||||
7605 | /// Determine what kind of declaration we're shadowing. | ||||||
7606 | static ShadowedDeclKind computeShadowedDeclKind(const NamedDecl *ShadowedDecl, | ||||||
7607 | const DeclContext *OldDC) { | ||||||
7608 | if (isa<TypeAliasDecl>(ShadowedDecl)) | ||||||
7609 | return SDK_Using; | ||||||
7610 | else if (isa<TypedefDecl>(ShadowedDecl)) | ||||||
7611 | return SDK_Typedef; | ||||||
7612 | else if (isa<BindingDecl>(ShadowedDecl)) | ||||||
7613 | return SDK_StructuredBinding; | ||||||
7614 | else if (isa<RecordDecl>(OldDC)) | ||||||
7615 | return isa<FieldDecl>(ShadowedDecl) ? SDK_Field : SDK_StaticMember; | ||||||
7616 | |||||||
7617 | return OldDC->isFileContext() ? SDK_Global : SDK_Local; | ||||||
7618 | } | ||||||
7619 | |||||||
7620 | /// Return the location of the capture if the given lambda captures the given | ||||||
7621 | /// variable \p VD, or an invalid source location otherwise. | ||||||
7622 | static SourceLocation getCaptureLocation(const LambdaScopeInfo *LSI, | ||||||
7623 | const VarDecl *VD) { | ||||||
7624 | for (const Capture &Capture : LSI->Captures) { | ||||||
7625 | if (Capture.isVariableCapture() && Capture.getVariable() == VD) | ||||||
7626 | return Capture.getLocation(); | ||||||
7627 | } | ||||||
7628 | return SourceLocation(); | ||||||
7629 | } | ||||||
7630 | |||||||
7631 | static bool shouldWarnIfShadowedDecl(const DiagnosticsEngine &Diags, | ||||||
7632 | const LookupResult &R) { | ||||||
7633 | // Only diagnose if we're shadowing an unambiguous field or variable. | ||||||
7634 | if (R.getResultKind() != LookupResult::Found) | ||||||
7635 | return false; | ||||||
7636 | |||||||
7637 | // Return false if warning is ignored. | ||||||
7638 | return !Diags.isIgnored(diag::warn_decl_shadow, R.getNameLoc()); | ||||||
7639 | } | ||||||
7640 | |||||||
7641 | /// Return the declaration shadowed by the given variable \p D, or null | ||||||
7642 | /// if it doesn't shadow any declaration or shadowing warnings are disabled. | ||||||
7643 | NamedDecl *Sema::getShadowedDeclaration(const VarDecl *D, | ||||||
7644 | const LookupResult &R) { | ||||||
7645 | if (!shouldWarnIfShadowedDecl(Diags, R)) | ||||||
7646 | return nullptr; | ||||||
7647 | |||||||
7648 | // Don't diagnose declarations at file scope. | ||||||
7649 | if (D->hasGlobalStorage()) | ||||||
7650 | return nullptr; | ||||||
7651 | |||||||
7652 | NamedDecl *ShadowedDecl = R.getFoundDecl(); | ||||||
7653 | return isa<VarDecl, FieldDecl, BindingDecl>(ShadowedDecl) ? ShadowedDecl | ||||||
7654 | : nullptr; | ||||||
7655 | } | ||||||
7656 | |||||||
7657 | /// Return the declaration shadowed by the given typedef \p D, or null | ||||||
7658 | /// if it doesn't shadow any declaration or shadowing warnings are disabled. | ||||||
7659 | NamedDecl *Sema::getShadowedDeclaration(const TypedefNameDecl *D, | ||||||
7660 | const LookupResult &R) { | ||||||
7661 | // Don't warn if typedef declaration is part of a class | ||||||
7662 | if (D->getDeclContext()->isRecord()) | ||||||
7663 | return nullptr; | ||||||
7664 | |||||||
7665 | if (!shouldWarnIfShadowedDecl(Diags, R)) | ||||||
7666 | return nullptr; | ||||||
7667 | |||||||
7668 | NamedDecl *ShadowedDecl = R.getFoundDecl(); | ||||||
7669 | return isa<TypedefNameDecl>(ShadowedDecl) ? ShadowedDecl : nullptr; | ||||||
7670 | } | ||||||
7671 | |||||||
7672 | /// Return the declaration shadowed by the given variable \p D, or null | ||||||
7673 | /// if it doesn't shadow any declaration or shadowing warnings are disabled. | ||||||
7674 | NamedDecl *Sema::getShadowedDeclaration(const BindingDecl *D, | ||||||
7675 | const LookupResult &R) { | ||||||
7676 | if (!shouldWarnIfShadowedDecl(Diags, R)) | ||||||
7677 | return nullptr; | ||||||
7678 | |||||||
7679 | NamedDecl *ShadowedDecl = R.getFoundDecl(); | ||||||
7680 | return isa<VarDecl, FieldDecl, BindingDecl>(ShadowedDecl) ? ShadowedDecl | ||||||
7681 | : nullptr; | ||||||
7682 | } | ||||||
7683 | |||||||
7684 | /// Diagnose variable or built-in function shadowing. Implements | ||||||
7685 | /// -Wshadow. | ||||||
7686 | /// | ||||||
7687 | /// This method is called whenever a VarDecl is added to a "useful" | ||||||
7688 | /// scope. | ||||||
7689 | /// | ||||||
7690 | /// \param ShadowedDecl the declaration that is shadowed by the given variable | ||||||
7691 | /// \param R the lookup of the name | ||||||
7692 | /// | ||||||
7693 | void Sema::CheckShadow(NamedDecl *D, NamedDecl *ShadowedDecl, | ||||||
7694 | const LookupResult &R) { | ||||||
7695 | DeclContext *NewDC = D->getDeclContext(); | ||||||
7696 | |||||||
7697 | if (FieldDecl *FD = dyn_cast<FieldDecl>(ShadowedDecl)) { | ||||||
7698 | // Fields are not shadowed by variables in C++ static methods. | ||||||
7699 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewDC)) | ||||||
7700 | if (MD->isStatic()) | ||||||
7701 | return; | ||||||
7702 | |||||||
7703 | // Fields shadowed by constructor parameters are a special case. Usually | ||||||
7704 | // the constructor initializes the field with the parameter. | ||||||
7705 | if (isa<CXXConstructorDecl>(NewDC)) | ||||||
7706 | if (const auto PVD = dyn_cast<ParmVarDecl>(D)) { | ||||||
7707 | // Remember that this was shadowed so we can either warn about its | ||||||
7708 | // modification or its existence depending on warning settings. | ||||||
7709 | ShadowingDecls.insert({PVD->getCanonicalDecl(), FD}); | ||||||
7710 | return; | ||||||
7711 | } | ||||||
7712 | } | ||||||
7713 | |||||||
7714 | if (VarDecl *shadowedVar = dyn_cast<VarDecl>(ShadowedDecl)) | ||||||
7715 | if (shadowedVar->isExternC()) { | ||||||
7716 | // For shadowing external vars, make sure that we point to the global | ||||||
7717 | // declaration, not a locally scoped extern declaration. | ||||||
7718 | for (auto I : shadowedVar->redecls()) | ||||||
7719 | if (I->isFileVarDecl()) { | ||||||
7720 | ShadowedDecl = I; | ||||||
7721 | break; | ||||||
7722 | } | ||||||
7723 | } | ||||||
7724 | |||||||
7725 | DeclContext *OldDC = ShadowedDecl->getDeclContext()->getRedeclContext(); | ||||||
7726 | |||||||
7727 | unsigned WarningDiag = diag::warn_decl_shadow; | ||||||
7728 | SourceLocation CaptureLoc; | ||||||
7729 | if (isa<VarDecl>(D) && isa<VarDecl>(ShadowedDecl) && NewDC && | ||||||
7730 | isa<CXXMethodDecl>(NewDC)) { | ||||||
7731 | if (const auto *RD = dyn_cast<CXXRecordDecl>(NewDC->getParent())) { | ||||||
7732 | if (RD->isLambda() && OldDC->Encloses(NewDC->getLexicalParent())) { | ||||||
7733 | if (RD->getLambdaCaptureDefault() == LCD_None) { | ||||||
7734 | // Try to avoid warnings for lambdas with an explicit capture list. | ||||||
7735 | const auto *LSI = cast<LambdaScopeInfo>(getCurFunction()); | ||||||
7736 | // Warn only when the lambda captures the shadowed decl explicitly. | ||||||
7737 | CaptureLoc = getCaptureLocation(LSI, cast<VarDecl>(ShadowedDecl)); | ||||||
7738 | if (CaptureLoc.isInvalid()) | ||||||
7739 | WarningDiag = diag::warn_decl_shadow_uncaptured_local; | ||||||
7740 | } else { | ||||||
7741 | // Remember that this was shadowed so we can avoid the warning if the | ||||||
7742 | // shadowed decl isn't captured and the warning settings allow it. | ||||||
7743 | cast<LambdaScopeInfo>(getCurFunction()) | ||||||
7744 | ->ShadowingDecls.push_back( | ||||||
7745 | {cast<VarDecl>(D), cast<VarDecl>(ShadowedDecl)}); | ||||||
7746 | return; | ||||||
7747 | } | ||||||
7748 | } | ||||||
7749 | |||||||
7750 | if (cast<VarDecl>(ShadowedDecl)->hasLocalStorage()) { | ||||||
7751 | // A variable can't shadow a local variable in an enclosing scope, if | ||||||
7752 | // they are separated by a non-capturing declaration context. | ||||||
7753 | for (DeclContext *ParentDC = NewDC; | ||||||
7754 | ParentDC && !ParentDC->Equals(OldDC); | ||||||
7755 | ParentDC = getLambdaAwareParentOfDeclContext(ParentDC)) { | ||||||
7756 | // Only block literals, captured statements, and lambda expressions | ||||||
7757 | // can capture; other scopes don't. | ||||||
7758 | if (!isa<BlockDecl>(ParentDC) && !isa<CapturedDecl>(ParentDC) && | ||||||
7759 | !isLambdaCallOperator(ParentDC)) { | ||||||
7760 | return; | ||||||
7761 | } | ||||||
7762 | } | ||||||
7763 | } | ||||||
7764 | } | ||||||
7765 | } | ||||||
7766 | |||||||
7767 | // Only warn about certain kinds of shadowing for class members. | ||||||
7768 | if (NewDC && NewDC->isRecord()) { | ||||||
7769 | // In particular, don't warn about shadowing non-class members. | ||||||
7770 | if (!OldDC->isRecord()) | ||||||
7771 | return; | ||||||
7772 | |||||||
7773 | // TODO: should we warn about static data members shadowing | ||||||
7774 | // static data members from base classes? | ||||||
7775 | |||||||
7776 | // TODO: don't diagnose for inaccessible shadowed members. | ||||||
7777 | // This is hard to do perfectly because we might friend the | ||||||
7778 | // shadowing context, but that's just a false negative. | ||||||
7779 | } | ||||||
7780 | |||||||
7781 | |||||||
7782 | DeclarationName Name = R.getLookupName(); | ||||||
7783 | |||||||
7784 | // Emit warning and note. | ||||||
7785 | if (getSourceManager().isInSystemMacro(R.getNameLoc())) | ||||||
7786 | return; | ||||||
7787 | ShadowedDeclKind Kind = computeShadowedDeclKind(ShadowedDecl, OldDC); | ||||||
7788 | Diag(R.getNameLoc(), WarningDiag) << Name << Kind << OldDC; | ||||||
7789 | if (!CaptureLoc.isInvalid()) | ||||||
7790 | Diag(CaptureLoc, diag::note_var_explicitly_captured_here) | ||||||
7791 | << Name << /*explicitly*/ 1; | ||||||
7792 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7793 | } | ||||||
7794 | |||||||
7795 | /// Diagnose shadowing for variables shadowed in the lambda record \p LambdaRD | ||||||
7796 | /// when these variables are captured by the lambda. | ||||||
7797 | void Sema::DiagnoseShadowingLambdaDecls(const LambdaScopeInfo *LSI) { | ||||||
7798 | for (const auto &Shadow : LSI->ShadowingDecls) { | ||||||
7799 | const VarDecl *ShadowedDecl = Shadow.ShadowedDecl; | ||||||
7800 | // Try to avoid the warning when the shadowed decl isn't captured. | ||||||
7801 | SourceLocation CaptureLoc = getCaptureLocation(LSI, ShadowedDecl); | ||||||
7802 | const DeclContext *OldDC = ShadowedDecl->getDeclContext(); | ||||||
7803 | Diag(Shadow.VD->getLocation(), CaptureLoc.isInvalid() | ||||||
7804 | ? diag::warn_decl_shadow_uncaptured_local | ||||||
7805 | : diag::warn_decl_shadow) | ||||||
7806 | << Shadow.VD->getDeclName() | ||||||
7807 | << computeShadowedDeclKind(ShadowedDecl, OldDC) << OldDC; | ||||||
7808 | if (!CaptureLoc.isInvalid()) | ||||||
7809 | Diag(CaptureLoc, diag::note_var_explicitly_captured_here) | ||||||
7810 | << Shadow.VD->getDeclName() << /*explicitly*/ 0; | ||||||
7811 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7812 | } | ||||||
7813 | } | ||||||
7814 | |||||||
7815 | /// Check -Wshadow without the advantage of a previous lookup. | ||||||
7816 | void Sema::CheckShadow(Scope *S, VarDecl *D) { | ||||||
7817 | if (Diags.isIgnored(diag::warn_decl_shadow, D->getLocation())) | ||||||
7818 | return; | ||||||
7819 | |||||||
7820 | LookupResult R(*this, D->getDeclName(), D->getLocation(), | ||||||
7821 | Sema::LookupOrdinaryName, Sema::ForVisibleRedeclaration); | ||||||
7822 | LookupName(R, S); | ||||||
7823 | if (NamedDecl *ShadowedDecl = getShadowedDeclaration(D, R)) | ||||||
7824 | CheckShadow(D, ShadowedDecl, R); | ||||||
7825 | } | ||||||
7826 | |||||||
7827 | /// Check if 'E', which is an expression that is about to be modified, refers | ||||||
7828 | /// to a constructor parameter that shadows a field. | ||||||
7829 | void Sema::CheckShadowingDeclModification(Expr *E, SourceLocation Loc) { | ||||||
7830 | // Quickly ignore expressions that can't be shadowing ctor parameters. | ||||||
7831 | if (!getLangOpts().CPlusPlus || ShadowingDecls.empty()) | ||||||
7832 | return; | ||||||
7833 | E = E->IgnoreParenImpCasts(); | ||||||
7834 | auto *DRE = dyn_cast<DeclRefExpr>(E); | ||||||
7835 | if (!DRE) | ||||||
7836 | return; | ||||||
7837 | const NamedDecl *D = cast<NamedDecl>(DRE->getDecl()->getCanonicalDecl()); | ||||||
7838 | auto I = ShadowingDecls.find(D); | ||||||
7839 | if (I == ShadowingDecls.end()) | ||||||
7840 | return; | ||||||
7841 | const NamedDecl *ShadowedDecl = I->second; | ||||||
7842 | const DeclContext *OldDC = ShadowedDecl->getDeclContext(); | ||||||
7843 | Diag(Loc, diag::warn_modifying_shadowing_decl) << D << OldDC; | ||||||
7844 | Diag(D->getLocation(), diag::note_var_declared_here) << D; | ||||||
7845 | Diag(ShadowedDecl->getLocation(), diag::note_previous_declaration); | ||||||
7846 | |||||||
7847 | // Avoid issuing multiple warnings about the same decl. | ||||||
7848 | ShadowingDecls.erase(I); | ||||||
7849 | } | ||||||
7850 | |||||||
7851 | /// Check for conflict between this global or extern "C" declaration and | ||||||
7852 | /// previous global or extern "C" declarations. This is only used in C++. | ||||||
7853 | template<typename T> | ||||||
7854 | static bool checkGlobalOrExternCConflict( | ||||||
7855 | Sema &S, const T *ND, bool IsGlobal, LookupResult &Previous) { | ||||||
7856 | assert(S.getLangOpts().CPlusPlus && "only C++ has extern \"C\"")(static_cast <bool> (S.getLangOpts().CPlusPlus && "only C++ has extern \"C\"") ? void (0) : __assert_fail ("S.getLangOpts().CPlusPlus && \"only C++ has extern \\\"C\\\"\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7856, __extension__ __PRETTY_FUNCTION__)); | ||||||
7857 | NamedDecl *Prev = S.findLocallyScopedExternCDecl(ND->getDeclName()); | ||||||
7858 | |||||||
7859 | if (!Prev && IsGlobal && !isIncompleteDeclExternC(S, ND)) { | ||||||
7860 | // The common case: this global doesn't conflict with any extern "C" | ||||||
7861 | // declaration. | ||||||
7862 | return false; | ||||||
7863 | } | ||||||
7864 | |||||||
7865 | if (Prev) { | ||||||
7866 | if (!IsGlobal || isIncompleteDeclExternC(S, ND)) { | ||||||
7867 | // Both the old and new declarations have C language linkage. This is a | ||||||
7868 | // redeclaration. | ||||||
7869 | Previous.clear(); | ||||||
7870 | Previous.addDecl(Prev); | ||||||
7871 | return true; | ||||||
7872 | } | ||||||
7873 | |||||||
7874 | // This is a global, non-extern "C" declaration, and there is a previous | ||||||
7875 | // non-global extern "C" declaration. Diagnose if this is a variable | ||||||
7876 | // declaration. | ||||||
7877 | if (!isa<VarDecl>(ND)) | ||||||
7878 | return false; | ||||||
7879 | } else { | ||||||
7880 | // The declaration is extern "C". Check for any declaration in the | ||||||
7881 | // translation unit which might conflict. | ||||||
7882 | if (IsGlobal) { | ||||||
7883 | // We have already performed the lookup into the translation unit. | ||||||
7884 | IsGlobal = false; | ||||||
7885 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||||
7886 | I != E; ++I) { | ||||||
7887 | if (isa<VarDecl>(*I)) { | ||||||
7888 | Prev = *I; | ||||||
7889 | break; | ||||||
7890 | } | ||||||
7891 | } | ||||||
7892 | } else { | ||||||
7893 | DeclContext::lookup_result R = | ||||||
7894 | S.Context.getTranslationUnitDecl()->lookup(ND->getDeclName()); | ||||||
7895 | for (DeclContext::lookup_result::iterator I = R.begin(), E = R.end(); | ||||||
7896 | I != E; ++I) { | ||||||
7897 | if (isa<VarDecl>(*I)) { | ||||||
7898 | Prev = *I; | ||||||
7899 | break; | ||||||
7900 | } | ||||||
7901 | // FIXME: If we have any other entity with this name in global scope, | ||||||
7902 | // the declaration is ill-formed, but that is a defect: it breaks the | ||||||
7903 | // 'stat' hack, for instance. Only variables can have mangled name | ||||||
7904 | // clashes with extern "C" declarations, so only they deserve a | ||||||
7905 | // diagnostic. | ||||||
7906 | } | ||||||
7907 | } | ||||||
7908 | |||||||
7909 | if (!Prev) | ||||||
7910 | return false; | ||||||
7911 | } | ||||||
7912 | |||||||
7913 | // Use the first declaration's location to ensure we point at something which | ||||||
7914 | // is lexically inside an extern "C" linkage-spec. | ||||||
7915 | assert(Prev && "should have found a previous declaration to diagnose")(static_cast <bool> (Prev && "should have found a previous declaration to diagnose" ) ? void (0) : __assert_fail ("Prev && \"should have found a previous declaration to diagnose\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 7915, __extension__ __PRETTY_FUNCTION__)); | ||||||
7916 | if (FunctionDecl *FD = dyn_cast<FunctionDecl>(Prev)) | ||||||
7917 | Prev = FD->getFirstDecl(); | ||||||
7918 | else | ||||||
7919 | Prev = cast<VarDecl>(Prev)->getFirstDecl(); | ||||||
7920 | |||||||
7921 | S.Diag(ND->getLocation(), diag::err_extern_c_global_conflict) | ||||||
7922 | << IsGlobal << ND; | ||||||
7923 | S.Diag(Prev->getLocation(), diag::note_extern_c_global_conflict) | ||||||
7924 | << IsGlobal; | ||||||
7925 | return false; | ||||||
7926 | } | ||||||
7927 | |||||||
7928 | /// Apply special rules for handling extern "C" declarations. Returns \c true | ||||||
7929 | /// if we have found that this is a redeclaration of some prior entity. | ||||||
7930 | /// | ||||||
7931 | /// Per C++ [dcl.link]p6: | ||||||
7932 | /// Two declarations [for a function or variable] with C language linkage | ||||||
7933 | /// with the same name that appear in different scopes refer to the same | ||||||
7934 | /// [entity]. An entity with C language linkage shall not be declared with | ||||||
7935 | /// the same name as an entity in global scope. | ||||||
7936 | template<typename T> | ||||||
7937 | static bool checkForConflictWithNonVisibleExternC(Sema &S, const T *ND, | ||||||
7938 | LookupResult &Previous) { | ||||||
7939 | if (!S.getLangOpts().CPlusPlus) { | ||||||
7940 | // In C, when declaring a global variable, look for a corresponding 'extern' | ||||||
7941 | // variable declared in function scope. We don't need this in C++, because | ||||||
7942 | // we find local extern decls in the surrounding file-scope DeclContext. | ||||||
7943 | if (ND->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
7944 | if (NamedDecl *Prev = S.findLocallyScopedExternCDecl(ND->getDeclName())) { | ||||||
7945 | Previous.clear(); | ||||||
7946 | Previous.addDecl(Prev); | ||||||
7947 | return true; | ||||||
7948 | } | ||||||
7949 | } | ||||||
7950 | return false; | ||||||
7951 | } | ||||||
7952 | |||||||
7953 | // A declaration in the translation unit can conflict with an extern "C" | ||||||
7954 | // declaration. | ||||||
7955 | if (ND->getDeclContext()->getRedeclContext()->isTranslationUnit()) | ||||||
7956 | return checkGlobalOrExternCConflict(S, ND, /*IsGlobal*/true, Previous); | ||||||
7957 | |||||||
7958 | // An extern "C" declaration can conflict with a declaration in the | ||||||
7959 | // translation unit or can be a redeclaration of an extern "C" declaration | ||||||
7960 | // in another scope. | ||||||
7961 | if (isIncompleteDeclExternC(S,ND)) | ||||||
7962 | return checkGlobalOrExternCConflict(S, ND, /*IsGlobal*/false, Previous); | ||||||
7963 | |||||||
7964 | // Neither global nor extern "C": nothing to do. | ||||||
7965 | return false; | ||||||
7966 | } | ||||||
7967 | |||||||
7968 | void Sema::CheckVariableDeclarationType(VarDecl *NewVD) { | ||||||
7969 | // If the decl is already known invalid, don't check it. | ||||||
7970 | if (NewVD->isInvalidDecl()) | ||||||
7971 | return; | ||||||
7972 | |||||||
7973 | QualType T = NewVD->getType(); | ||||||
7974 | |||||||
7975 | // Defer checking an 'auto' type until its initializer is attached. | ||||||
7976 | if (T->isUndeducedType()) | ||||||
7977 | return; | ||||||
7978 | |||||||
7979 | if (NewVD->hasAttrs()) | ||||||
7980 | CheckAlignasUnderalignment(NewVD); | ||||||
7981 | |||||||
7982 | if (T->isObjCObjectType()) { | ||||||
7983 | Diag(NewVD->getLocation(), diag::err_statically_allocated_object) | ||||||
7984 | << FixItHint::CreateInsertion(NewVD->getLocation(), "*"); | ||||||
7985 | T = Context.getObjCObjectPointerType(T); | ||||||
7986 | NewVD->setType(T); | ||||||
7987 | } | ||||||
7988 | |||||||
7989 | // Emit an error if an address space was applied to decl with local storage. | ||||||
7990 | // This includes arrays of objects with address space qualifiers, but not | ||||||
7991 | // automatic variables that point to other address spaces. | ||||||
7992 | // ISO/IEC TR 18037 S5.1.2 | ||||||
7993 | if (!getLangOpts().OpenCL && NewVD->hasLocalStorage() && | ||||||
7994 | T.getAddressSpace() != LangAS::Default) { | ||||||
7995 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl) << 0; | ||||||
7996 | NewVD->setInvalidDecl(); | ||||||
7997 | return; | ||||||
7998 | } | ||||||
7999 | |||||||
8000 | // OpenCL v1.2 s6.8 - The static qualifier is valid only in program | ||||||
8001 | // scope. | ||||||
8002 | if (getLangOpts().OpenCLVersion == 120 && | ||||||
8003 | !getOpenCLOptions().isAvailableOption("cl_clang_storage_class_specifiers", | ||||||
8004 | getLangOpts()) && | ||||||
8005 | NewVD->isStaticLocal()) { | ||||||
8006 | Diag(NewVD->getLocation(), diag::err_static_function_scope); | ||||||
8007 | NewVD->setInvalidDecl(); | ||||||
8008 | return; | ||||||
8009 | } | ||||||
8010 | |||||||
8011 | if (getLangOpts().OpenCL) { | ||||||
8012 | if (!diagnoseOpenCLTypes(*this, NewVD)) | ||||||
8013 | return; | ||||||
8014 | |||||||
8015 | // OpenCL v2.0 s6.12.5 - The __block storage type is not supported. | ||||||
8016 | if (NewVD->hasAttr<BlocksAttr>()) { | ||||||
8017 | Diag(NewVD->getLocation(), diag::err_opencl_block_storage_type); | ||||||
8018 | return; | ||||||
8019 | } | ||||||
8020 | |||||||
8021 | if (T->isBlockPointerType()) { | ||||||
8022 | // OpenCL v2.0 s6.12.5 - Any block declaration must be const qualified and | ||||||
8023 | // can't use 'extern' storage class. | ||||||
8024 | if (!T.isConstQualified()) { | ||||||
8025 | Diag(NewVD->getLocation(), diag::err_opencl_invalid_block_declaration) | ||||||
8026 | << 0 /*const*/; | ||||||
8027 | NewVD->setInvalidDecl(); | ||||||
8028 | return; | ||||||
8029 | } | ||||||
8030 | if (NewVD->hasExternalStorage()) { | ||||||
8031 | Diag(NewVD->getLocation(), diag::err_opencl_extern_block_declaration); | ||||||
8032 | NewVD->setInvalidDecl(); | ||||||
8033 | return; | ||||||
8034 | } | ||||||
8035 | } | ||||||
8036 | |||||||
8037 | // FIXME: Adding local AS in C++ for OpenCL might make sense. | ||||||
8038 | if (NewVD->isFileVarDecl() || NewVD->isStaticLocal() || | ||||||
8039 | NewVD->hasExternalStorage()) { | ||||||
8040 | if (!T->isSamplerT() && !T->isDependentType() && | ||||||
8041 | !(T.getAddressSpace() == LangAS::opencl_constant || | ||||||
8042 | (T.getAddressSpace() == LangAS::opencl_global && | ||||||
8043 | getOpenCLOptions().areProgramScopeVariablesSupported( | ||||||
8044 | getLangOpts())))) { | ||||||
8045 | int Scope = NewVD->isStaticLocal() | NewVD->hasExternalStorage() << 1; | ||||||
8046 | if (getOpenCLOptions().areProgramScopeVariablesSupported(getLangOpts())) | ||||||
8047 | Diag(NewVD->getLocation(), diag::err_opencl_global_invalid_addr_space) | ||||||
8048 | << Scope << "global or constant"; | ||||||
8049 | else | ||||||
8050 | Diag(NewVD->getLocation(), diag::err_opencl_global_invalid_addr_space) | ||||||
8051 | << Scope << "constant"; | ||||||
8052 | NewVD->setInvalidDecl(); | ||||||
8053 | return; | ||||||
8054 | } | ||||||
8055 | } else { | ||||||
8056 | if (T.getAddressSpace() == LangAS::opencl_global) { | ||||||
8057 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
8058 | << 1 /*is any function*/ << "global"; | ||||||
8059 | NewVD->setInvalidDecl(); | ||||||
8060 | return; | ||||||
8061 | } | ||||||
8062 | if (T.getAddressSpace() == LangAS::opencl_constant || | ||||||
8063 | T.getAddressSpace() == LangAS::opencl_local) { | ||||||
8064 | FunctionDecl *FD = getCurFunctionDecl(); | ||||||
8065 | // OpenCL v1.1 s6.5.2 and s6.5.3: no local or constant variables | ||||||
8066 | // in functions. | ||||||
8067 | if (FD && !FD->hasAttr<OpenCLKernelAttr>()) { | ||||||
8068 | if (T.getAddressSpace() == LangAS::opencl_constant) | ||||||
8069 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
8070 | << 0 /*non-kernel only*/ << "constant"; | ||||||
8071 | else | ||||||
8072 | Diag(NewVD->getLocation(), diag::err_opencl_function_variable) | ||||||
8073 | << 0 /*non-kernel only*/ << "local"; | ||||||
8074 | NewVD->setInvalidDecl(); | ||||||
8075 | return; | ||||||
8076 | } | ||||||
8077 | // OpenCL v2.0 s6.5.2 and s6.5.3: local and constant variables must be | ||||||
8078 | // in the outermost scope of a kernel function. | ||||||
8079 | if (FD && FD->hasAttr<OpenCLKernelAttr>()) { | ||||||
8080 | if (!getCurScope()->isFunctionScope()) { | ||||||
8081 | if (T.getAddressSpace() == LangAS::opencl_constant) | ||||||
8082 | Diag(NewVD->getLocation(), diag::err_opencl_addrspace_scope) | ||||||
8083 | << "constant"; | ||||||
8084 | else | ||||||
8085 | Diag(NewVD->getLocation(), diag::err_opencl_addrspace_scope) | ||||||
8086 | << "local"; | ||||||
8087 | NewVD->setInvalidDecl(); | ||||||
8088 | return; | ||||||
8089 | } | ||||||
8090 | } | ||||||
8091 | } else if (T.getAddressSpace() != LangAS::opencl_private && | ||||||
8092 | // If we are parsing a template we didn't deduce an addr | ||||||
8093 | // space yet. | ||||||
8094 | T.getAddressSpace() != LangAS::Default) { | ||||||
8095 | // Do not allow other address spaces on automatic variable. | ||||||
8096 | Diag(NewVD->getLocation(), diag::err_as_qualified_auto_decl) << 1; | ||||||
8097 | NewVD->setInvalidDecl(); | ||||||
8098 | return; | ||||||
8099 | } | ||||||
8100 | } | ||||||
8101 | } | ||||||
8102 | |||||||
8103 | if (NewVD->hasLocalStorage() && T.isObjCGCWeak() | ||||||
8104 | && !NewVD->hasAttr<BlocksAttr>()) { | ||||||
8105 | if (getLangOpts().getGC() != LangOptions::NonGC) | ||||||
8106 | Diag(NewVD->getLocation(), diag::warn_gc_attribute_weak_on_local); | ||||||
8107 | else { | ||||||
8108 | assert(!getLangOpts().ObjCAutoRefCount)(static_cast <bool> (!getLangOpts().ObjCAutoRefCount) ? void (0) : __assert_fail ("!getLangOpts().ObjCAutoRefCount", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8108, __extension__ __PRETTY_FUNCTION__)); | ||||||
8109 | Diag(NewVD->getLocation(), diag::warn_attribute_weak_on_local); | ||||||
8110 | } | ||||||
8111 | } | ||||||
8112 | |||||||
8113 | bool isVM = T->isVariablyModifiedType(); | ||||||
8114 | if (isVM || NewVD->hasAttr<CleanupAttr>() || | ||||||
8115 | NewVD->hasAttr<BlocksAttr>()) | ||||||
8116 | setFunctionHasBranchProtectedScope(); | ||||||
8117 | |||||||
8118 | if ((isVM && NewVD->hasLinkage()) || | ||||||
8119 | (T->isVariableArrayType() && NewVD->hasGlobalStorage())) { | ||||||
8120 | bool SizeIsNegative; | ||||||
8121 | llvm::APSInt Oversized; | ||||||
8122 | TypeSourceInfo *FixedTInfo = TryToFixInvalidVariablyModifiedTypeSourceInfo( | ||||||
8123 | NewVD->getTypeSourceInfo(), Context, SizeIsNegative, Oversized); | ||||||
8124 | QualType FixedT; | ||||||
8125 | if (FixedTInfo && T == NewVD->getTypeSourceInfo()->getType()) | ||||||
8126 | FixedT = FixedTInfo->getType(); | ||||||
8127 | else if (FixedTInfo) { | ||||||
8128 | // Type and type-as-written are canonically different. We need to fix up | ||||||
8129 | // both types separately. | ||||||
8130 | FixedT = TryToFixInvalidVariablyModifiedType(T, Context, SizeIsNegative, | ||||||
8131 | Oversized); | ||||||
8132 | } | ||||||
8133 | if ((!FixedTInfo || FixedT.isNull()) && T->isVariableArrayType()) { | ||||||
8134 | const VariableArrayType *VAT = Context.getAsVariableArrayType(T); | ||||||
8135 | // FIXME: This won't give the correct result for | ||||||
8136 | // int a[10][n]; | ||||||
8137 | SourceRange SizeRange = VAT->getSizeExpr()->getSourceRange(); | ||||||
8138 | |||||||
8139 | if (NewVD->isFileVarDecl()) | ||||||
8140 | Diag(NewVD->getLocation(), diag::err_vla_decl_in_file_scope) | ||||||
8141 | << SizeRange; | ||||||
8142 | else if (NewVD->isStaticLocal()) | ||||||
8143 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_static_storage) | ||||||
8144 | << SizeRange; | ||||||
8145 | else | ||||||
8146 | Diag(NewVD->getLocation(), diag::err_vla_decl_has_extern_linkage) | ||||||
8147 | << SizeRange; | ||||||
8148 | NewVD->setInvalidDecl(); | ||||||
8149 | return; | ||||||
8150 | } | ||||||
8151 | |||||||
8152 | if (!FixedTInfo) { | ||||||
8153 | if (NewVD->isFileVarDecl()) | ||||||
8154 | Diag(NewVD->getLocation(), diag::err_vm_decl_in_file_scope); | ||||||
8155 | else | ||||||
8156 | Diag(NewVD->getLocation(), diag::err_vm_decl_has_extern_linkage); | ||||||
8157 | NewVD->setInvalidDecl(); | ||||||
8158 | return; | ||||||
8159 | } | ||||||
8160 | |||||||
8161 | Diag(NewVD->getLocation(), diag::ext_vla_folded_to_constant); | ||||||
8162 | NewVD->setType(FixedT); | ||||||
8163 | NewVD->setTypeSourceInfo(FixedTInfo); | ||||||
8164 | } | ||||||
8165 | |||||||
8166 | if (T->isVoidType()) { | ||||||
8167 | // C++98 [dcl.stc]p5: The extern specifier can be applied only to the names | ||||||
8168 | // of objects and functions. | ||||||
8169 | if (NewVD->isThisDeclarationADefinition() || getLangOpts().CPlusPlus) { | ||||||
8170 | Diag(NewVD->getLocation(), diag::err_typecheck_decl_incomplete_type) | ||||||
8171 | << T; | ||||||
8172 | NewVD->setInvalidDecl(); | ||||||
8173 | return; | ||||||
8174 | } | ||||||
8175 | } | ||||||
8176 | |||||||
8177 | if (!NewVD->hasLocalStorage() && NewVD->hasAttr<BlocksAttr>()) { | ||||||
8178 | Diag(NewVD->getLocation(), diag::err_block_on_nonlocal); | ||||||
8179 | NewVD->setInvalidDecl(); | ||||||
8180 | return; | ||||||
8181 | } | ||||||
8182 | |||||||
8183 | if (!NewVD->hasLocalStorage() && T->isSizelessType()) { | ||||||
8184 | Diag(NewVD->getLocation(), diag::err_sizeless_nonlocal) << T; | ||||||
8185 | NewVD->setInvalidDecl(); | ||||||
8186 | return; | ||||||
8187 | } | ||||||
8188 | |||||||
8189 | if (isVM && NewVD->hasAttr<BlocksAttr>()) { | ||||||
8190 | Diag(NewVD->getLocation(), diag::err_block_on_vm); | ||||||
8191 | NewVD->setInvalidDecl(); | ||||||
8192 | return; | ||||||
8193 | } | ||||||
8194 | |||||||
8195 | if (NewVD->isConstexpr() && !T->isDependentType() && | ||||||
8196 | RequireLiteralType(NewVD->getLocation(), T, | ||||||
8197 | diag::err_constexpr_var_non_literal)) { | ||||||
8198 | NewVD->setInvalidDecl(); | ||||||
8199 | return; | ||||||
8200 | } | ||||||
8201 | |||||||
8202 | // PPC MMA non-pointer types are not allowed as non-local variable types. | ||||||
8203 | if (Context.getTargetInfo().getTriple().isPPC64() && | ||||||
8204 | !NewVD->isLocalVarDecl() && | ||||||
8205 | CheckPPCMMAType(T, NewVD->getLocation())) { | ||||||
8206 | NewVD->setInvalidDecl(); | ||||||
8207 | return; | ||||||
8208 | } | ||||||
8209 | } | ||||||
8210 | |||||||
8211 | /// Perform semantic checking on a newly-created variable | ||||||
8212 | /// declaration. | ||||||
8213 | /// | ||||||
8214 | /// This routine performs all of the type-checking required for a | ||||||
8215 | /// variable declaration once it has been built. It is used both to | ||||||
8216 | /// check variables after they have been parsed and their declarators | ||||||
8217 | /// have been translated into a declaration, and to check variables | ||||||
8218 | /// that have been instantiated from a template. | ||||||
8219 | /// | ||||||
8220 | /// Sets NewVD->isInvalidDecl() if an error was encountered. | ||||||
8221 | /// | ||||||
8222 | /// Returns true if the variable declaration is a redeclaration. | ||||||
8223 | bool Sema::CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous) { | ||||||
8224 | CheckVariableDeclarationType(NewVD); | ||||||
8225 | |||||||
8226 | // If the decl is already known invalid, don't check it. | ||||||
8227 | if (NewVD->isInvalidDecl()) | ||||||
8228 | return false; | ||||||
8229 | |||||||
8230 | // If we did not find anything by this name, look for a non-visible | ||||||
8231 | // extern "C" declaration with the same name. | ||||||
8232 | if (Previous.empty() && | ||||||
8233 | checkForConflictWithNonVisibleExternC(*this, NewVD, Previous)) | ||||||
8234 | Previous.setShadowed(); | ||||||
8235 | |||||||
8236 | if (!Previous.empty()) { | ||||||
8237 | MergeVarDecl(NewVD, Previous); | ||||||
8238 | return true; | ||||||
8239 | } | ||||||
8240 | return false; | ||||||
8241 | } | ||||||
8242 | |||||||
8243 | /// AddOverriddenMethods - See if a method overrides any in the base classes, | ||||||
8244 | /// and if so, check that it's a valid override and remember it. | ||||||
8245 | bool Sema::AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD) { | ||||||
8246 | llvm::SmallPtrSet<const CXXMethodDecl*, 4> Overridden; | ||||||
8247 | |||||||
8248 | // Look for methods in base classes that this method might override. | ||||||
8249 | CXXBasePaths Paths(/*FindAmbiguities=*/true, /*RecordPaths=*/false, | ||||||
8250 | /*DetectVirtual=*/false); | ||||||
8251 | auto VisitBase = [&] (const CXXBaseSpecifier *Specifier, CXXBasePath &Path) { | ||||||
8252 | CXXRecordDecl *BaseRecord = Specifier->getType()->getAsCXXRecordDecl(); | ||||||
8253 | DeclarationName Name = MD->getDeclName(); | ||||||
8254 | |||||||
8255 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
8256 | // We really want to find the base class destructor here. | ||||||
8257 | QualType T = Context.getTypeDeclType(BaseRecord); | ||||||
8258 | CanQualType CT = Context.getCanonicalType(T); | ||||||
8259 | Name = Context.DeclarationNames.getCXXDestructorName(CT); | ||||||
8260 | } | ||||||
8261 | |||||||
8262 | for (NamedDecl *BaseND : BaseRecord->lookup(Name)) { | ||||||
8263 | CXXMethodDecl *BaseMD = | ||||||
8264 | dyn_cast<CXXMethodDecl>(BaseND->getCanonicalDecl()); | ||||||
8265 | if (!BaseMD || !BaseMD->isVirtual() || | ||||||
8266 | IsOverload(MD, BaseMD, /*UseMemberUsingDeclRules=*/false, | ||||||
8267 | /*ConsiderCudaAttrs=*/true, | ||||||
8268 | // C++2a [class.virtual]p2 does not consider requires | ||||||
8269 | // clauses when overriding. | ||||||
8270 | /*ConsiderRequiresClauses=*/false)) | ||||||
8271 | continue; | ||||||
8272 | |||||||
8273 | if (Overridden.insert(BaseMD).second) { | ||||||
8274 | MD->addOverriddenMethod(BaseMD); | ||||||
8275 | CheckOverridingFunctionReturnType(MD, BaseMD); | ||||||
8276 | CheckOverridingFunctionAttributes(MD, BaseMD); | ||||||
8277 | CheckOverridingFunctionExceptionSpec(MD, BaseMD); | ||||||
8278 | CheckIfOverriddenFunctionIsMarkedFinal(MD, BaseMD); | ||||||
8279 | } | ||||||
8280 | |||||||
8281 | // A method can only override one function from each base class. We | ||||||
8282 | // don't track indirectly overridden methods from bases of bases. | ||||||
8283 | return true; | ||||||
8284 | } | ||||||
8285 | |||||||
8286 | return false; | ||||||
8287 | }; | ||||||
8288 | |||||||
8289 | DC->lookupInBases(VisitBase, Paths); | ||||||
8290 | return !Overridden.empty(); | ||||||
8291 | } | ||||||
8292 | |||||||
8293 | namespace { | ||||||
8294 | // Struct for holding all of the extra arguments needed by | ||||||
8295 | // DiagnoseInvalidRedeclaration to call Sema::ActOnFunctionDeclarator. | ||||||
8296 | struct ActOnFDArgs { | ||||||
8297 | Scope *S; | ||||||
8298 | Declarator &D; | ||||||
8299 | MultiTemplateParamsArg TemplateParamLists; | ||||||
8300 | bool AddToScope; | ||||||
8301 | }; | ||||||
8302 | } // end anonymous namespace | ||||||
8303 | |||||||
8304 | namespace { | ||||||
8305 | |||||||
8306 | // Callback to only accept typo corrections that have a non-zero edit distance. | ||||||
8307 | // Also only accept corrections that have the same parent decl. | ||||||
8308 | class DifferentNameValidatorCCC final : public CorrectionCandidateCallback { | ||||||
8309 | public: | ||||||
8310 | DifferentNameValidatorCCC(ASTContext &Context, FunctionDecl *TypoFD, | ||||||
8311 | CXXRecordDecl *Parent) | ||||||
8312 | : Context(Context), OriginalFD(TypoFD), | ||||||
8313 | ExpectedParent(Parent ? Parent->getCanonicalDecl() : nullptr) {} | ||||||
8314 | |||||||
8315 | bool ValidateCandidate(const TypoCorrection &candidate) override { | ||||||
8316 | if (candidate.getEditDistance() == 0) | ||||||
8317 | return false; | ||||||
8318 | |||||||
8319 | SmallVector<unsigned, 1> MismatchedParams; | ||||||
8320 | for (TypoCorrection::const_decl_iterator CDecl = candidate.begin(), | ||||||
8321 | CDeclEnd = candidate.end(); | ||||||
8322 | CDecl != CDeclEnd; ++CDecl) { | ||||||
8323 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*CDecl); | ||||||
8324 | |||||||
8325 | if (FD && !FD->hasBody() && | ||||||
8326 | hasSimilarParameters(Context, FD, OriginalFD, MismatchedParams)) { | ||||||
8327 | if (CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
8328 | CXXRecordDecl *Parent = MD->getParent(); | ||||||
8329 | if (Parent && Parent->getCanonicalDecl() == ExpectedParent) | ||||||
8330 | return true; | ||||||
8331 | } else if (!ExpectedParent) { | ||||||
8332 | return true; | ||||||
8333 | } | ||||||
8334 | } | ||||||
8335 | } | ||||||
8336 | |||||||
8337 | return false; | ||||||
8338 | } | ||||||
8339 | |||||||
8340 | std::unique_ptr<CorrectionCandidateCallback> clone() override { | ||||||
8341 | return std::make_unique<DifferentNameValidatorCCC>(*this); | ||||||
8342 | } | ||||||
8343 | |||||||
8344 | private: | ||||||
8345 | ASTContext &Context; | ||||||
8346 | FunctionDecl *OriginalFD; | ||||||
8347 | CXXRecordDecl *ExpectedParent; | ||||||
8348 | }; | ||||||
8349 | |||||||
8350 | } // end anonymous namespace | ||||||
8351 | |||||||
8352 | void Sema::MarkTypoCorrectedFunctionDefinition(const NamedDecl *F) { | ||||||
8353 | TypoCorrectedFunctionDefinitions.insert(F); | ||||||
8354 | } | ||||||
8355 | |||||||
8356 | /// Generate diagnostics for an invalid function redeclaration. | ||||||
8357 | /// | ||||||
8358 | /// This routine handles generating the diagnostic messages for an invalid | ||||||
8359 | /// function redeclaration, including finding possible similar declarations | ||||||
8360 | /// or performing typo correction if there are no previous declarations with | ||||||
8361 | /// the same name. | ||||||
8362 | /// | ||||||
8363 | /// Returns a NamedDecl iff typo correction was performed and substituting in | ||||||
8364 | /// the new declaration name does not cause new errors. | ||||||
8365 | static NamedDecl *DiagnoseInvalidRedeclaration( | ||||||
8366 | Sema &SemaRef, LookupResult &Previous, FunctionDecl *NewFD, | ||||||
8367 | ActOnFDArgs &ExtraArgs, bool IsLocalFriend, Scope *S) { | ||||||
8368 | DeclarationName Name = NewFD->getDeclName(); | ||||||
8369 | DeclContext *NewDC = NewFD->getDeclContext(); | ||||||
8370 | SmallVector<unsigned, 1> MismatchedParams; | ||||||
8371 | SmallVector<std::pair<FunctionDecl *, unsigned>, 1> NearMatches; | ||||||
8372 | TypoCorrection Correction; | ||||||
8373 | bool IsDefinition = ExtraArgs.D.isFunctionDefinition(); | ||||||
8374 | unsigned DiagMsg = | ||||||
8375 | IsLocalFriend ? diag::err_no_matching_local_friend : | ||||||
8376 | NewFD->getFriendObjectKind() ? diag::err_qualified_friend_no_match : | ||||||
8377 | diag::err_member_decl_does_not_match; | ||||||
8378 | LookupResult Prev(SemaRef, Name, NewFD->getLocation(), | ||||||
8379 | IsLocalFriend ? Sema::LookupLocalFriendName | ||||||
8380 | : Sema::LookupOrdinaryName, | ||||||
8381 | Sema::ForVisibleRedeclaration); | ||||||
8382 | |||||||
8383 | NewFD->setInvalidDecl(); | ||||||
8384 | if (IsLocalFriend) | ||||||
8385 | SemaRef.LookupName(Prev, S); | ||||||
8386 | else | ||||||
8387 | SemaRef.LookupQualifiedName(Prev, NewDC); | ||||||
8388 | assert(!Prev.isAmbiguous() &&(static_cast <bool> (!Prev.isAmbiguous() && "Cannot have an ambiguity in previous-declaration lookup" ) ? void (0) : __assert_fail ("!Prev.isAmbiguous() && \"Cannot have an ambiguity in previous-declaration lookup\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8389, __extension__ __PRETTY_FUNCTION__)) | ||||||
8389 | "Cannot have an ambiguity in previous-declaration lookup")(static_cast <bool> (!Prev.isAmbiguous() && "Cannot have an ambiguity in previous-declaration lookup" ) ? void (0) : __assert_fail ("!Prev.isAmbiguous() && \"Cannot have an ambiguity in previous-declaration lookup\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8389, __extension__ __PRETTY_FUNCTION__)); | ||||||
8390 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD); | ||||||
8391 | DifferentNameValidatorCCC CCC(SemaRef.Context, NewFD, | ||||||
8392 | MD ? MD->getParent() : nullptr); | ||||||
8393 | if (!Prev.empty()) { | ||||||
8394 | for (LookupResult::iterator Func = Prev.begin(), FuncEnd = Prev.end(); | ||||||
8395 | Func != FuncEnd; ++Func) { | ||||||
8396 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*Func); | ||||||
8397 | if (FD && | ||||||
8398 | hasSimilarParameters(SemaRef.Context, FD, NewFD, MismatchedParams)) { | ||||||
8399 | // Add 1 to the index so that 0 can mean the mismatch didn't | ||||||
8400 | // involve a parameter | ||||||
8401 | unsigned ParamNum = | ||||||
8402 | MismatchedParams.empty() ? 0 : MismatchedParams.front() + 1; | ||||||
8403 | NearMatches.push_back(std::make_pair(FD, ParamNum)); | ||||||
8404 | } | ||||||
8405 | } | ||||||
8406 | // If the qualified name lookup yielded nothing, try typo correction | ||||||
8407 | } else if ((Correction = SemaRef.CorrectTypo( | ||||||
8408 | Prev.getLookupNameInfo(), Prev.getLookupKind(), S, | ||||||
8409 | &ExtraArgs.D.getCXXScopeSpec(), CCC, Sema::CTK_ErrorRecovery, | ||||||
8410 | IsLocalFriend ? nullptr : NewDC))) { | ||||||
8411 | // Set up everything for the call to ActOnFunctionDeclarator | ||||||
8412 | ExtraArgs.D.SetIdentifier(Correction.getCorrectionAsIdentifierInfo(), | ||||||
8413 | ExtraArgs.D.getIdentifierLoc()); | ||||||
8414 | Previous.clear(); | ||||||
8415 | Previous.setLookupName(Correction.getCorrection()); | ||||||
8416 | for (TypoCorrection::decl_iterator CDecl = Correction.begin(), | ||||||
8417 | CDeclEnd = Correction.end(); | ||||||
8418 | CDecl != CDeclEnd; ++CDecl) { | ||||||
8419 | FunctionDecl *FD = dyn_cast<FunctionDecl>(*CDecl); | ||||||
8420 | if (FD && !FD->hasBody() && | ||||||
8421 | hasSimilarParameters(SemaRef.Context, FD, NewFD, MismatchedParams)) { | ||||||
8422 | Previous.addDecl(FD); | ||||||
8423 | } | ||||||
8424 | } | ||||||
8425 | bool wasRedeclaration = ExtraArgs.D.isRedeclaration(); | ||||||
8426 | |||||||
8427 | NamedDecl *Result; | ||||||
8428 | // Retry building the function declaration with the new previous | ||||||
8429 | // declarations, and with errors suppressed. | ||||||
8430 | { | ||||||
8431 | // Trap errors. | ||||||
8432 | Sema::SFINAETrap Trap(SemaRef); | ||||||
8433 | |||||||
8434 | // TODO: Refactor ActOnFunctionDeclarator so that we can call only the | ||||||
8435 | // pieces need to verify the typo-corrected C++ declaration and hopefully | ||||||
8436 | // eliminate the need for the parameter pack ExtraArgs. | ||||||
8437 | Result = SemaRef.ActOnFunctionDeclarator( | ||||||
8438 | ExtraArgs.S, ExtraArgs.D, | ||||||
8439 | Correction.getCorrectionDecl()->getDeclContext(), | ||||||
8440 | NewFD->getTypeSourceInfo(), Previous, ExtraArgs.TemplateParamLists, | ||||||
8441 | ExtraArgs.AddToScope); | ||||||
8442 | |||||||
8443 | if (Trap.hasErrorOccurred()) | ||||||
8444 | Result = nullptr; | ||||||
8445 | } | ||||||
8446 | |||||||
8447 | if (Result) { | ||||||
8448 | // Determine which correction we picked. | ||||||
8449 | Decl *Canonical = Result->getCanonicalDecl(); | ||||||
8450 | for (LookupResult::iterator I = Previous.begin(), E = Previous.end(); | ||||||
8451 | I != E; ++I) | ||||||
8452 | if ((*I)->getCanonicalDecl() == Canonical) | ||||||
8453 | Correction.setCorrectionDecl(*I); | ||||||
8454 | |||||||
8455 | // Let Sema know about the correction. | ||||||
8456 | SemaRef.MarkTypoCorrectedFunctionDefinition(Result); | ||||||
8457 | SemaRef.diagnoseTypo( | ||||||
8458 | Correction, | ||||||
8459 | SemaRef.PDiag(IsLocalFriend | ||||||
8460 | ? diag::err_no_matching_local_friend_suggest | ||||||
8461 | : diag::err_member_decl_does_not_match_suggest) | ||||||
8462 | << Name << NewDC << IsDefinition); | ||||||
8463 | return Result; | ||||||
8464 | } | ||||||
8465 | |||||||
8466 | // Pretend the typo correction never occurred | ||||||
8467 | ExtraArgs.D.SetIdentifier(Name.getAsIdentifierInfo(), | ||||||
8468 | ExtraArgs.D.getIdentifierLoc()); | ||||||
8469 | ExtraArgs.D.setRedeclaration(wasRedeclaration); | ||||||
8470 | Previous.clear(); | ||||||
8471 | Previous.setLookupName(Name); | ||||||
8472 | } | ||||||
8473 | |||||||
8474 | SemaRef.Diag(NewFD->getLocation(), DiagMsg) | ||||||
8475 | << Name << NewDC << IsDefinition << NewFD->getLocation(); | ||||||
8476 | |||||||
8477 | bool NewFDisConst = false; | ||||||
8478 | if (CXXMethodDecl *NewMD = dyn_cast<CXXMethodDecl>(NewFD)) | ||||||
8479 | NewFDisConst = NewMD->isConst(); | ||||||
8480 | |||||||
8481 | for (SmallVectorImpl<std::pair<FunctionDecl *, unsigned> >::iterator | ||||||
8482 | NearMatch = NearMatches.begin(), NearMatchEnd = NearMatches.end(); | ||||||
8483 | NearMatch != NearMatchEnd; ++NearMatch) { | ||||||
8484 | FunctionDecl *FD = NearMatch->first; | ||||||
8485 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD); | ||||||
8486 | bool FDisConst = MD && MD->isConst(); | ||||||
8487 | bool IsMember = MD || !IsLocalFriend; | ||||||
8488 | |||||||
8489 | // FIXME: These notes are poorly worded for the local friend case. | ||||||
8490 | if (unsigned Idx = NearMatch->second) { | ||||||
8491 | ParmVarDecl *FDParam = FD->getParamDecl(Idx-1); | ||||||
8492 | SourceLocation Loc = FDParam->getTypeSpecStartLoc(); | ||||||
8493 | if (Loc.isInvalid()) Loc = FD->getLocation(); | ||||||
8494 | SemaRef.Diag(Loc, IsMember ? diag::note_member_def_close_param_match | ||||||
8495 | : diag::note_local_decl_close_param_match) | ||||||
8496 | << Idx << FDParam->getType() | ||||||
8497 | << NewFD->getParamDecl(Idx - 1)->getType(); | ||||||
8498 | } else if (FDisConst != NewFDisConst) { | ||||||
8499 | SemaRef.Diag(FD->getLocation(), diag::note_member_def_close_const_match) | ||||||
8500 | << NewFDisConst << FD->getSourceRange().getEnd(); | ||||||
8501 | } else | ||||||
8502 | SemaRef.Diag(FD->getLocation(), | ||||||
8503 | IsMember ? diag::note_member_def_close_match | ||||||
8504 | : diag::note_local_decl_close_match); | ||||||
8505 | } | ||||||
8506 | return nullptr; | ||||||
8507 | } | ||||||
8508 | |||||||
8509 | static StorageClass getFunctionStorageClass(Sema &SemaRef, Declarator &D) { | ||||||
8510 | switch (D.getDeclSpec().getStorageClassSpec()) { | ||||||
8511 | default: llvm_unreachable("Unknown storage class!")::llvm::llvm_unreachable_internal("Unknown storage class!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8511); | ||||||
8512 | case DeclSpec::SCS_auto: | ||||||
8513 | case DeclSpec::SCS_register: | ||||||
8514 | case DeclSpec::SCS_mutable: | ||||||
8515 | SemaRef.Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
8516 | diag::err_typecheck_sclass_func); | ||||||
8517 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||
8518 | D.setInvalidType(); | ||||||
8519 | break; | ||||||
8520 | case DeclSpec::SCS_unspecified: break; | ||||||
8521 | case DeclSpec::SCS_extern: | ||||||
8522 | if (D.getDeclSpec().isExternInLinkageSpec()) | ||||||
8523 | return SC_None; | ||||||
8524 | return SC_Extern; | ||||||
8525 | case DeclSpec::SCS_static: { | ||||||
8526 | if (SemaRef.CurContext->getRedeclContext()->isFunctionOrMethod()) { | ||||||
8527 | // C99 6.7.1p5: | ||||||
8528 | // The declaration of an identifier for a function that has | ||||||
8529 | // block scope shall have no explicit storage-class specifier | ||||||
8530 | // other than extern | ||||||
8531 | // See also (C++ [dcl.stc]p4). | ||||||
8532 | SemaRef.Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
8533 | diag::err_static_block_func); | ||||||
8534 | break; | ||||||
8535 | } else | ||||||
8536 | return SC_Static; | ||||||
8537 | } | ||||||
8538 | case DeclSpec::SCS_private_extern: return SC_PrivateExtern; | ||||||
8539 | } | ||||||
8540 | |||||||
8541 | // No explicit storage class has already been returned | ||||||
8542 | return SC_None; | ||||||
8543 | } | ||||||
8544 | |||||||
8545 | static FunctionDecl *CreateNewFunctionDecl(Sema &SemaRef, Declarator &D, | ||||||
8546 | DeclContext *DC, QualType &R, | ||||||
8547 | TypeSourceInfo *TInfo, | ||||||
8548 | StorageClass SC, | ||||||
8549 | bool &IsVirtualOkay) { | ||||||
8550 | DeclarationNameInfo NameInfo = SemaRef.GetNameForDeclarator(D); | ||||||
8551 | DeclarationName Name = NameInfo.getName(); | ||||||
8552 | |||||||
8553 | FunctionDecl *NewFD = nullptr; | ||||||
8554 | bool isInline = D.getDeclSpec().isInlineSpecified(); | ||||||
8555 | |||||||
8556 | if (!SemaRef.getLangOpts().CPlusPlus) { | ||||||
8557 | // Determine whether the function was written with a | ||||||
8558 | // prototype. This true when: | ||||||
8559 | // - there is a prototype in the declarator, or | ||||||
8560 | // - the type R of the function is some kind of typedef or other non- | ||||||
8561 | // attributed reference to a type name (which eventually refers to a | ||||||
8562 | // function type). | ||||||
8563 | bool HasPrototype = | ||||||
8564 | (D.isFunctionDeclarator() && D.getFunctionTypeInfo().hasPrototype) || | ||||||
8565 | (!R->getAsAdjusted<FunctionType>() && R->isFunctionProtoType()); | ||||||
8566 | |||||||
8567 | NewFD = FunctionDecl::Create( | ||||||
8568 | SemaRef.Context, DC, D.getBeginLoc(), NameInfo, R, TInfo, SC, | ||||||
8569 | SemaRef.getCurFPFeatures().isFPConstrained(), isInline, HasPrototype, | ||||||
8570 | ConstexprSpecKind::Unspecified, | ||||||
8571 | /*TrailingRequiresClause=*/nullptr); | ||||||
8572 | if (D.isInvalidType()) | ||||||
8573 | NewFD->setInvalidDecl(); | ||||||
8574 | |||||||
8575 | return NewFD; | ||||||
8576 | } | ||||||
8577 | |||||||
8578 | ExplicitSpecifier ExplicitSpecifier = D.getDeclSpec().getExplicitSpecifier(); | ||||||
8579 | |||||||
8580 | ConstexprSpecKind ConstexprKind = D.getDeclSpec().getConstexprSpecifier(); | ||||||
8581 | if (ConstexprKind == ConstexprSpecKind::Constinit) { | ||||||
8582 | SemaRef.Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
8583 | diag::err_constexpr_wrong_decl_kind) | ||||||
8584 | << static_cast<int>(ConstexprKind); | ||||||
8585 | ConstexprKind = ConstexprSpecKind::Unspecified; | ||||||
8586 | D.getMutableDeclSpec().ClearConstexprSpec(); | ||||||
8587 | } | ||||||
8588 | Expr *TrailingRequiresClause = D.getTrailingRequiresClause(); | ||||||
8589 | |||||||
8590 | // Check that the return type is not an abstract class type. | ||||||
8591 | // For record types, this is done by the AbstractClassUsageDiagnoser once | ||||||
8592 | // the class has been completely parsed. | ||||||
8593 | if (!DC->isRecord() && | ||||||
8594 | SemaRef.RequireNonAbstractType( | ||||||
8595 | D.getIdentifierLoc(), R->castAs<FunctionType>()->getReturnType(), | ||||||
8596 | diag::err_abstract_type_in_decl, SemaRef.AbstractReturnType)) | ||||||
8597 | D.setInvalidType(); | ||||||
8598 | |||||||
8599 | if (Name.getNameKind() == DeclarationName::CXXConstructorName) { | ||||||
8600 | // This is a C++ constructor declaration. | ||||||
8601 | assert(DC->isRecord() &&(static_cast <bool> (DC->isRecord() && "Constructors can only be declared in a member context" ) ? void (0) : __assert_fail ("DC->isRecord() && \"Constructors can only be declared in a member context\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8602, __extension__ __PRETTY_FUNCTION__)) | ||||||
8602 | "Constructors can only be declared in a member context")(static_cast <bool> (DC->isRecord() && "Constructors can only be declared in a member context" ) ? void (0) : __assert_fail ("DC->isRecord() && \"Constructors can only be declared in a member context\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8602, __extension__ __PRETTY_FUNCTION__)); | ||||||
8603 | |||||||
8604 | R = SemaRef.CheckConstructorDeclarator(D, R, SC); | ||||||
8605 | return CXXConstructorDecl::Create( | ||||||
8606 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8607 | TInfo, ExplicitSpecifier, SemaRef.getCurFPFeatures().isFPConstrained(), | ||||||
8608 | isInline, /*isImplicitlyDeclared=*/false, ConstexprKind, | ||||||
8609 | InheritedConstructor(), TrailingRequiresClause); | ||||||
8610 | |||||||
8611 | } else if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
8612 | // This is a C++ destructor declaration. | ||||||
8613 | if (DC->isRecord()) { | ||||||
8614 | R = SemaRef.CheckDestructorDeclarator(D, R, SC); | ||||||
8615 | CXXRecordDecl *Record = cast<CXXRecordDecl>(DC); | ||||||
8616 | CXXDestructorDecl *NewDD = CXXDestructorDecl::Create( | ||||||
8617 | SemaRef.Context, Record, D.getBeginLoc(), NameInfo, R, TInfo, | ||||||
8618 | SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8619 | /*isImplicitlyDeclared=*/false, ConstexprKind, | ||||||
8620 | TrailingRequiresClause); | ||||||
8621 | |||||||
8622 | // If the destructor needs an implicit exception specification, set it | ||||||
8623 | // now. FIXME: It'd be nice to be able to create the right type to start | ||||||
8624 | // with, but the type needs to reference the destructor declaration. | ||||||
8625 | if (SemaRef.getLangOpts().CPlusPlus11) | ||||||
8626 | SemaRef.AdjustDestructorExceptionSpec(NewDD); | ||||||
8627 | |||||||
8628 | IsVirtualOkay = true; | ||||||
8629 | return NewDD; | ||||||
8630 | |||||||
8631 | } else { | ||||||
8632 | SemaRef.Diag(D.getIdentifierLoc(), diag::err_destructor_not_member); | ||||||
8633 | D.setInvalidType(); | ||||||
8634 | |||||||
8635 | // Create a FunctionDecl to satisfy the function definition parsing | ||||||
8636 | // code path. | ||||||
8637 | return FunctionDecl::Create( | ||||||
8638 | SemaRef.Context, DC, D.getBeginLoc(), D.getIdentifierLoc(), Name, R, | ||||||
8639 | TInfo, SC, SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8640 | /*hasPrototype=*/true, ConstexprKind, TrailingRequiresClause); | ||||||
8641 | } | ||||||
8642 | |||||||
8643 | } else if (Name.getNameKind() == DeclarationName::CXXConversionFunctionName) { | ||||||
8644 | if (!DC->isRecord()) { | ||||||
8645 | SemaRef.Diag(D.getIdentifierLoc(), | ||||||
8646 | diag::err_conv_function_not_member); | ||||||
8647 | return nullptr; | ||||||
8648 | } | ||||||
8649 | |||||||
8650 | SemaRef.CheckConversionDeclarator(D, R, SC); | ||||||
8651 | if (D.isInvalidType()) | ||||||
8652 | return nullptr; | ||||||
8653 | |||||||
8654 | IsVirtualOkay = true; | ||||||
8655 | return CXXConversionDecl::Create( | ||||||
8656 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8657 | TInfo, SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8658 | ExplicitSpecifier, ConstexprKind, SourceLocation(), | ||||||
8659 | TrailingRequiresClause); | ||||||
8660 | |||||||
8661 | } else if (Name.getNameKind() == DeclarationName::CXXDeductionGuideName) { | ||||||
8662 | if (TrailingRequiresClause) | ||||||
8663 | SemaRef.Diag(TrailingRequiresClause->getBeginLoc(), | ||||||
8664 | diag::err_trailing_requires_clause_on_deduction_guide) | ||||||
8665 | << TrailingRequiresClause->getSourceRange(); | ||||||
8666 | SemaRef.CheckDeductionGuideDeclarator(D, R, SC); | ||||||
8667 | |||||||
8668 | return CXXDeductionGuideDecl::Create(SemaRef.Context, DC, D.getBeginLoc(), | ||||||
8669 | ExplicitSpecifier, NameInfo, R, TInfo, | ||||||
8670 | D.getEndLoc()); | ||||||
8671 | } else if (DC->isRecord()) { | ||||||
8672 | // If the name of the function is the same as the name of the record, | ||||||
8673 | // then this must be an invalid constructor that has a return type. | ||||||
8674 | // (The parser checks for a return type and makes the declarator a | ||||||
8675 | // constructor if it has no return type). | ||||||
8676 | if (Name.getAsIdentifierInfo() && | ||||||
8677 | Name.getAsIdentifierInfo() == cast<CXXRecordDecl>(DC)->getIdentifier()){ | ||||||
8678 | SemaRef.Diag(D.getIdentifierLoc(), diag::err_constructor_return_type) | ||||||
8679 | << SourceRange(D.getDeclSpec().getTypeSpecTypeLoc()) | ||||||
8680 | << SourceRange(D.getIdentifierLoc()); | ||||||
8681 | return nullptr; | ||||||
8682 | } | ||||||
8683 | |||||||
8684 | // This is a C++ method declaration. | ||||||
8685 | CXXMethodDecl *Ret = CXXMethodDecl::Create( | ||||||
8686 | SemaRef.Context, cast<CXXRecordDecl>(DC), D.getBeginLoc(), NameInfo, R, | ||||||
8687 | TInfo, SC, SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8688 | ConstexprKind, SourceLocation(), TrailingRequiresClause); | ||||||
8689 | IsVirtualOkay = !Ret->isStatic(); | ||||||
8690 | return Ret; | ||||||
8691 | } else { | ||||||
8692 | bool isFriend = | ||||||
8693 | SemaRef.getLangOpts().CPlusPlus && D.getDeclSpec().isFriendSpecified(); | ||||||
8694 | if (!isFriend && SemaRef.CurContext->isRecord()) | ||||||
8695 | return nullptr; | ||||||
8696 | |||||||
8697 | // Determine whether the function was written with a | ||||||
8698 | // prototype. This true when: | ||||||
8699 | // - we're in C++ (where every function has a prototype), | ||||||
8700 | return FunctionDecl::Create( | ||||||
8701 | SemaRef.Context, DC, D.getBeginLoc(), NameInfo, R, TInfo, SC, | ||||||
8702 | SemaRef.getCurFPFeatures().isFPConstrained(), isInline, | ||||||
8703 | true /*HasPrototype*/, ConstexprKind, TrailingRequiresClause); | ||||||
8704 | } | ||||||
8705 | } | ||||||
8706 | |||||||
8707 | enum OpenCLParamType { | ||||||
8708 | ValidKernelParam, | ||||||
8709 | PtrPtrKernelParam, | ||||||
8710 | PtrKernelParam, | ||||||
8711 | InvalidAddrSpacePtrKernelParam, | ||||||
8712 | InvalidKernelParam, | ||||||
8713 | RecordKernelParam | ||||||
8714 | }; | ||||||
8715 | |||||||
8716 | static bool isOpenCLSizeDependentType(ASTContext &C, QualType Ty) { | ||||||
8717 | // Size dependent types are just typedefs to normal integer types | ||||||
8718 | // (e.g. unsigned long), so we cannot distinguish them from other typedefs to | ||||||
8719 | // integers other than by their names. | ||||||
8720 | StringRef SizeTypeNames[] = {"size_t", "intptr_t", "uintptr_t", "ptrdiff_t"}; | ||||||
8721 | |||||||
8722 | // Remove typedefs one by one until we reach a typedef | ||||||
8723 | // for a size dependent type. | ||||||
8724 | QualType DesugaredTy = Ty; | ||||||
8725 | do { | ||||||
8726 | ArrayRef<StringRef> Names(SizeTypeNames); | ||||||
8727 | auto Match = llvm::find(Names, DesugaredTy.getUnqualifiedType().getAsString()); | ||||||
8728 | if (Names.end() != Match) | ||||||
8729 | return true; | ||||||
8730 | |||||||
8731 | Ty = DesugaredTy; | ||||||
8732 | DesugaredTy = Ty.getSingleStepDesugaredType(C); | ||||||
8733 | } while (DesugaredTy != Ty); | ||||||
8734 | |||||||
8735 | return false; | ||||||
8736 | } | ||||||
8737 | |||||||
8738 | static OpenCLParamType getOpenCLKernelParameterType(Sema &S, QualType PT) { | ||||||
8739 | if (PT->isDependentType()) | ||||||
8740 | return InvalidKernelParam; | ||||||
8741 | |||||||
8742 | if (PT->isPointerType() || PT->isReferenceType()) { | ||||||
8743 | QualType PointeeType = PT->getPointeeType(); | ||||||
8744 | if (PointeeType.getAddressSpace() == LangAS::opencl_generic || | ||||||
8745 | PointeeType.getAddressSpace() == LangAS::opencl_private || | ||||||
8746 | PointeeType.getAddressSpace() == LangAS::Default) | ||||||
8747 | return InvalidAddrSpacePtrKernelParam; | ||||||
8748 | |||||||
8749 | if (PointeeType->isPointerType()) { | ||||||
8750 | // This is a pointer to pointer parameter. | ||||||
8751 | // Recursively check inner type. | ||||||
8752 | OpenCLParamType ParamKind = getOpenCLKernelParameterType(S, PointeeType); | ||||||
8753 | if (ParamKind == InvalidAddrSpacePtrKernelParam || | ||||||
8754 | ParamKind == InvalidKernelParam) | ||||||
8755 | return ParamKind; | ||||||
8756 | |||||||
8757 | return PtrPtrKernelParam; | ||||||
8758 | } | ||||||
8759 | |||||||
8760 | // C++ for OpenCL v1.0 s2.4: | ||||||
8761 | // Moreover the types used in parameters of the kernel functions must be: | ||||||
8762 | // Standard layout types for pointer parameters. The same applies to | ||||||
8763 | // reference if an implementation supports them in kernel parameters. | ||||||
8764 | if (S.getLangOpts().OpenCLCPlusPlus && | ||||||
8765 | !S.getOpenCLOptions().isAvailableOption( | ||||||
8766 | "__cl_clang_non_portable_kernel_param_types", S.getLangOpts()) && | ||||||
8767 | !PointeeType->isAtomicType() && !PointeeType->isVoidType() && | ||||||
8768 | !PointeeType->isStandardLayoutType()) | ||||||
8769 | return InvalidKernelParam; | ||||||
8770 | |||||||
8771 | return PtrKernelParam; | ||||||
8772 | } | ||||||
8773 | |||||||
8774 | // OpenCL v1.2 s6.9.k: | ||||||
8775 | // Arguments to kernel functions in a program cannot be declared with the | ||||||
8776 | // built-in scalar types bool, half, size_t, ptrdiff_t, intptr_t, and | ||||||
8777 | // uintptr_t or a struct and/or union that contain fields declared to be one | ||||||
8778 | // of these built-in scalar types. | ||||||
8779 | if (isOpenCLSizeDependentType(S.getASTContext(), PT)) | ||||||
8780 | return InvalidKernelParam; | ||||||
8781 | |||||||
8782 | if (PT->isImageType()) | ||||||
8783 | return PtrKernelParam; | ||||||
8784 | |||||||
8785 | if (PT->isBooleanType() || PT->isEventT() || PT->isReserveIDT()) | ||||||
8786 | return InvalidKernelParam; | ||||||
8787 | |||||||
8788 | // OpenCL extension spec v1.2 s9.5: | ||||||
8789 | // This extension adds support for half scalar and vector types as built-in | ||||||
8790 | // types that can be used for arithmetic operations, conversions etc. | ||||||
8791 | if (!S.getOpenCLOptions().isAvailableOption("cl_khr_fp16", S.getLangOpts()) && | ||||||
8792 | PT->isHalfType()) | ||||||
8793 | return InvalidKernelParam; | ||||||
8794 | |||||||
8795 | // Look into an array argument to check if it has a forbidden type. | ||||||
8796 | if (PT->isArrayType()) { | ||||||
8797 | const Type *UnderlyingTy = PT->getPointeeOrArrayElementType(); | ||||||
8798 | // Call ourself to check an underlying type of an array. Since the | ||||||
8799 | // getPointeeOrArrayElementType returns an innermost type which is not an | ||||||
8800 | // array, this recursive call only happens once. | ||||||
8801 | return getOpenCLKernelParameterType(S, QualType(UnderlyingTy, 0)); | ||||||
8802 | } | ||||||
8803 | |||||||
8804 | // C++ for OpenCL v1.0 s2.4: | ||||||
8805 | // Moreover the types used in parameters of the kernel functions must be: | ||||||
8806 | // Trivial and standard-layout types C++17 [basic.types] (plain old data | ||||||
8807 | // types) for parameters passed by value; | ||||||
8808 | if (S.getLangOpts().OpenCLCPlusPlus && | ||||||
8809 | !S.getOpenCLOptions().isAvailableOption( | ||||||
8810 | "__cl_clang_non_portable_kernel_param_types", S.getLangOpts()) && | ||||||
8811 | !PT->isOpenCLSpecificType() && !PT.isPODType(S.Context)) | ||||||
8812 | return InvalidKernelParam; | ||||||
8813 | |||||||
8814 | if (PT->isRecordType()) | ||||||
8815 | return RecordKernelParam; | ||||||
8816 | |||||||
8817 | return ValidKernelParam; | ||||||
8818 | } | ||||||
8819 | |||||||
8820 | static void checkIsValidOpenCLKernelParameter( | ||||||
8821 | Sema &S, | ||||||
8822 | Declarator &D, | ||||||
8823 | ParmVarDecl *Param, | ||||||
8824 | llvm::SmallPtrSetImpl<const Type *> &ValidTypes) { | ||||||
8825 | QualType PT = Param->getType(); | ||||||
8826 | |||||||
8827 | // Cache the valid types we encounter to avoid rechecking structs that are | ||||||
8828 | // used again | ||||||
8829 | if (ValidTypes.count(PT.getTypePtr())) | ||||||
8830 | return; | ||||||
8831 | |||||||
8832 | switch (getOpenCLKernelParameterType(S, PT)) { | ||||||
8833 | case PtrPtrKernelParam: | ||||||
8834 | // OpenCL v3.0 s6.11.a: | ||||||
8835 | // A kernel function argument cannot be declared as a pointer to a pointer | ||||||
8836 | // type. [...] This restriction only applies to OpenCL C 1.2 or below. | ||||||
8837 | if (S.getLangOpts().OpenCLVersion <= 120 && | ||||||
8838 | !S.getLangOpts().OpenCLCPlusPlus) { | ||||||
8839 | S.Diag(Param->getLocation(), diag::err_opencl_ptrptr_kernel_param); | ||||||
8840 | D.setInvalidType(); | ||||||
8841 | return; | ||||||
8842 | } | ||||||
8843 | |||||||
8844 | ValidTypes.insert(PT.getTypePtr()); | ||||||
8845 | return; | ||||||
8846 | |||||||
8847 | case InvalidAddrSpacePtrKernelParam: | ||||||
8848 | // OpenCL v1.0 s6.5: | ||||||
8849 | // __kernel function arguments declared to be a pointer of a type can point | ||||||
8850 | // to one of the following address spaces only : __global, __local or | ||||||
8851 | // __constant. | ||||||
8852 | S.Diag(Param->getLocation(), diag::err_kernel_arg_address_space); | ||||||
8853 | D.setInvalidType(); | ||||||
8854 | return; | ||||||
8855 | |||||||
8856 | // OpenCL v1.2 s6.9.k: | ||||||
8857 | // Arguments to kernel functions in a program cannot be declared with the | ||||||
8858 | // built-in scalar types bool, half, size_t, ptrdiff_t, intptr_t, and | ||||||
8859 | // uintptr_t or a struct and/or union that contain fields declared to be | ||||||
8860 | // one of these built-in scalar types. | ||||||
8861 | |||||||
8862 | case InvalidKernelParam: | ||||||
8863 | // OpenCL v1.2 s6.8 n: | ||||||
8864 | // A kernel function argument cannot be declared | ||||||
8865 | // of event_t type. | ||||||
8866 | // Do not diagnose half type since it is diagnosed as invalid argument | ||||||
8867 | // type for any function elsewhere. | ||||||
8868 | if (!PT->isHalfType()) { | ||||||
8869 | S.Diag(Param->getLocation(), diag::err_bad_kernel_param_type) << PT; | ||||||
8870 | |||||||
8871 | // Explain what typedefs are involved. | ||||||
8872 | const TypedefType *Typedef = nullptr; | ||||||
8873 | while ((Typedef = PT->getAs<TypedefType>())) { | ||||||
8874 | SourceLocation Loc = Typedef->getDecl()->getLocation(); | ||||||
8875 | // SourceLocation may be invalid for a built-in type. | ||||||
8876 | if (Loc.isValid()) | ||||||
8877 | S.Diag(Loc, diag::note_entity_declared_at) << PT; | ||||||
8878 | PT = Typedef->desugar(); | ||||||
8879 | } | ||||||
8880 | } | ||||||
8881 | |||||||
8882 | D.setInvalidType(); | ||||||
8883 | return; | ||||||
8884 | |||||||
8885 | case PtrKernelParam: | ||||||
8886 | case ValidKernelParam: | ||||||
8887 | ValidTypes.insert(PT.getTypePtr()); | ||||||
8888 | return; | ||||||
8889 | |||||||
8890 | case RecordKernelParam: | ||||||
8891 | break; | ||||||
8892 | } | ||||||
8893 | |||||||
8894 | // Track nested structs we will inspect | ||||||
8895 | SmallVector<const Decl *, 4> VisitStack; | ||||||
8896 | |||||||
8897 | // Track where we are in the nested structs. Items will migrate from | ||||||
8898 | // VisitStack to HistoryStack as we do the DFS for bad field. | ||||||
8899 | SmallVector<const FieldDecl *, 4> HistoryStack; | ||||||
8900 | HistoryStack.push_back(nullptr); | ||||||
8901 | |||||||
8902 | // At this point we already handled everything except of a RecordType or | ||||||
8903 | // an ArrayType of a RecordType. | ||||||
8904 | assert((PT->isArrayType() || PT->isRecordType()) && "Unexpected type.")(static_cast <bool> ((PT->isArrayType() || PT->isRecordType ()) && "Unexpected type.") ? void (0) : __assert_fail ("(PT->isArrayType() || PT->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8904, __extension__ __PRETTY_FUNCTION__)); | ||||||
8905 | const RecordType *RecTy = | ||||||
8906 | PT->getPointeeOrArrayElementType()->getAs<RecordType>(); | ||||||
8907 | const RecordDecl *OrigRecDecl = RecTy->getDecl(); | ||||||
8908 | |||||||
8909 | VisitStack.push_back(RecTy->getDecl()); | ||||||
8910 | assert(VisitStack.back() && "First decl null?")(static_cast <bool> (VisitStack.back() && "First decl null?" ) ? void (0) : __assert_fail ("VisitStack.back() && \"First decl null?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8910, __extension__ __PRETTY_FUNCTION__)); | ||||||
8911 | |||||||
8912 | do { | ||||||
8913 | const Decl *Next = VisitStack.pop_back_val(); | ||||||
8914 | if (!Next) { | ||||||
8915 | assert(!HistoryStack.empty())(static_cast <bool> (!HistoryStack.empty()) ? void (0) : __assert_fail ("!HistoryStack.empty()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8915, __extension__ __PRETTY_FUNCTION__)); | ||||||
8916 | // Found a marker, we have gone up a level | ||||||
8917 | if (const FieldDecl *Hist = HistoryStack.pop_back_val()) | ||||||
8918 | ValidTypes.insert(Hist->getType().getTypePtr()); | ||||||
8919 | |||||||
8920 | continue; | ||||||
8921 | } | ||||||
8922 | |||||||
8923 | // Adds everything except the original parameter declaration (which is not a | ||||||
8924 | // field itself) to the history stack. | ||||||
8925 | const RecordDecl *RD; | ||||||
8926 | if (const FieldDecl *Field = dyn_cast<FieldDecl>(Next)) { | ||||||
8927 | HistoryStack.push_back(Field); | ||||||
8928 | |||||||
8929 | QualType FieldTy = Field->getType(); | ||||||
8930 | // Other field types (known to be valid or invalid) are handled while we | ||||||
8931 | // walk around RecordDecl::fields(). | ||||||
8932 | assert((FieldTy->isArrayType() || FieldTy->isRecordType()) &&(static_cast <bool> ((FieldTy->isArrayType() || FieldTy ->isRecordType()) && "Unexpected type.") ? void (0 ) : __assert_fail ("(FieldTy->isArrayType() || FieldTy->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8933, __extension__ __PRETTY_FUNCTION__)) | ||||||
8933 | "Unexpected type.")(static_cast <bool> ((FieldTy->isArrayType() || FieldTy ->isRecordType()) && "Unexpected type.") ? void (0 ) : __assert_fail ("(FieldTy->isArrayType() || FieldTy->isRecordType()) && \"Unexpected type.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 8933, __extension__ __PRETTY_FUNCTION__)); | ||||||
8934 | const Type *FieldRecTy = FieldTy->getPointeeOrArrayElementType(); | ||||||
8935 | |||||||
8936 | RD = FieldRecTy->castAs<RecordType>()->getDecl(); | ||||||
8937 | } else { | ||||||
8938 | RD = cast<RecordDecl>(Next); | ||||||
8939 | } | ||||||
8940 | |||||||
8941 | // Add a null marker so we know when we've gone back up a level | ||||||
8942 | VisitStack.push_back(nullptr); | ||||||
8943 | |||||||
8944 | for (const auto *FD : RD->fields()) { | ||||||
8945 | QualType QT = FD->getType(); | ||||||
8946 | |||||||
8947 | if (ValidTypes.count(QT.getTypePtr())) | ||||||
8948 | continue; | ||||||
8949 | |||||||
8950 | OpenCLParamType ParamType = getOpenCLKernelParameterType(S, QT); | ||||||
8951 | if (ParamType == ValidKernelParam) | ||||||
8952 | continue; | ||||||
8953 | |||||||
8954 | if (ParamType == RecordKernelParam) { | ||||||
8955 | VisitStack.push_back(FD); | ||||||
8956 | continue; | ||||||
8957 | } | ||||||
8958 | |||||||
8959 | // OpenCL v1.2 s6.9.p: | ||||||
8960 | // Arguments to kernel functions that are declared to be a struct or union | ||||||
8961 | // do not allow OpenCL objects to be passed as elements of the struct or | ||||||
8962 | // union. | ||||||
8963 | if (ParamType == PtrKernelParam || ParamType == PtrPtrKernelParam || | ||||||
8964 | ParamType == InvalidAddrSpacePtrKernelParam) { | ||||||
8965 | S.Diag(Param->getLocation(), | ||||||
8966 | diag::err_record_with_pointers_kernel_param) | ||||||
8967 | << PT->isUnionType() | ||||||
8968 | << PT; | ||||||
8969 | } else { | ||||||
8970 | S.Diag(Param->getLocation(), diag::err_bad_kernel_param_type) << PT; | ||||||
8971 | } | ||||||
8972 | |||||||
8973 | S.Diag(OrigRecDecl->getLocation(), diag::note_within_field_of_type) | ||||||
8974 | << OrigRecDecl->getDeclName(); | ||||||
8975 | |||||||
8976 | // We have an error, now let's go back up through history and show where | ||||||
8977 | // the offending field came from | ||||||
8978 | for (ArrayRef<const FieldDecl *>::const_iterator | ||||||
8979 | I = HistoryStack.begin() + 1, | ||||||
8980 | E = HistoryStack.end(); | ||||||
8981 | I != E; ++I) { | ||||||
8982 | const FieldDecl *OuterField = *I; | ||||||
8983 | S.Diag(OuterField->getLocation(), diag::note_within_field_of_type) | ||||||
8984 | << OuterField->getType(); | ||||||
8985 | } | ||||||
8986 | |||||||
8987 | S.Diag(FD->getLocation(), diag::note_illegal_field_declared_here) | ||||||
8988 | << QT->isPointerType() | ||||||
8989 | << QT; | ||||||
8990 | D.setInvalidType(); | ||||||
8991 | return; | ||||||
8992 | } | ||||||
8993 | } while (!VisitStack.empty()); | ||||||
8994 | } | ||||||
8995 | |||||||
8996 | /// Find the DeclContext in which a tag is implicitly declared if we see an | ||||||
8997 | /// elaborated type specifier in the specified context, and lookup finds | ||||||
8998 | /// nothing. | ||||||
8999 | static DeclContext *getTagInjectionContext(DeclContext *DC) { | ||||||
9000 | while (!DC->isFileContext() && !DC->isFunctionOrMethod()) | ||||||
9001 | DC = DC->getParent(); | ||||||
9002 | return DC; | ||||||
9003 | } | ||||||
9004 | |||||||
9005 | /// Find the Scope in which a tag is implicitly declared if we see an | ||||||
9006 | /// elaborated type specifier in the specified context, and lookup finds | ||||||
9007 | /// nothing. | ||||||
9008 | static Scope *getTagInjectionScope(Scope *S, const LangOptions &LangOpts) { | ||||||
9009 | while (S->isClassScope() || | ||||||
9010 | (LangOpts.CPlusPlus && | ||||||
9011 | S->isFunctionPrototypeScope()) || | ||||||
9012 | ((S->getFlags() & Scope::DeclScope) == 0) || | ||||||
9013 | (S->getEntity() && S->getEntity()->isTransparentContext())) | ||||||
9014 | S = S->getParent(); | ||||||
9015 | return S; | ||||||
9016 | } | ||||||
9017 | |||||||
9018 | NamedDecl* | ||||||
9019 | Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC, | ||||||
9020 | TypeSourceInfo *TInfo, LookupResult &Previous, | ||||||
9021 | MultiTemplateParamsArg TemplateParamListsRef, | ||||||
9022 | bool &AddToScope) { | ||||||
9023 | QualType R = TInfo->getType(); | ||||||
9024 | |||||||
9025 | assert(R->isFunctionType())(static_cast <bool> (R->isFunctionType()) ? void (0) : __assert_fail ("R->isFunctionType()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9025, __extension__ __PRETTY_FUNCTION__)); | ||||||
9026 | if (R.getCanonicalType()->castAs<FunctionType>()->getCmseNSCallAttr()) | ||||||
9027 | Diag(D.getIdentifierLoc(), diag::err_function_decl_cmse_ns_call); | ||||||
9028 | |||||||
9029 | SmallVector<TemplateParameterList *, 4> TemplateParamLists; | ||||||
9030 | for (TemplateParameterList *TPL : TemplateParamListsRef) | ||||||
9031 | TemplateParamLists.push_back(TPL); | ||||||
9032 | if (TemplateParameterList *Invented = D.getInventedTemplateParameterList()) { | ||||||
9033 | if (!TemplateParamLists.empty() && | ||||||
9034 | Invented->getDepth() == TemplateParamLists.back()->getDepth()) | ||||||
9035 | TemplateParamLists.back() = Invented; | ||||||
9036 | else | ||||||
9037 | TemplateParamLists.push_back(Invented); | ||||||
9038 | } | ||||||
9039 | |||||||
9040 | // TODO: consider using NameInfo for diagnostic. | ||||||
9041 | DeclarationNameInfo NameInfo = GetNameForDeclarator(D); | ||||||
9042 | DeclarationName Name = NameInfo.getName(); | ||||||
9043 | StorageClass SC = getFunctionStorageClass(*this, D); | ||||||
9044 | |||||||
9045 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||||
9046 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
9047 | diag::err_invalid_thread) | ||||||
9048 | << DeclSpec::getSpecifierName(TSCS); | ||||||
9049 | |||||||
9050 | if (D.isFirstDeclarationOfMember()) | ||||||
9051 | adjustMemberFunctionCC(R, D.isStaticMember(), D.isCtorOrDtor(), | ||||||
9052 | D.getIdentifierLoc()); | ||||||
9053 | |||||||
9054 | bool isFriend = false; | ||||||
9055 | FunctionTemplateDecl *FunctionTemplate = nullptr; | ||||||
9056 | bool isMemberSpecialization = false; | ||||||
9057 | bool isFunctionTemplateSpecialization = false; | ||||||
9058 | |||||||
9059 | bool isDependentClassScopeExplicitSpecialization = false; | ||||||
9060 | bool HasExplicitTemplateArgs = false; | ||||||
9061 | TemplateArgumentListInfo TemplateArgs; | ||||||
9062 | |||||||
9063 | bool isVirtualOkay = false; | ||||||
9064 | |||||||
9065 | DeclContext *OriginalDC = DC; | ||||||
9066 | bool IsLocalExternDecl = adjustContextForLocalExternDecl(DC); | ||||||
9067 | |||||||
9068 | FunctionDecl *NewFD = CreateNewFunctionDecl(*this, D, DC, R, TInfo, SC, | ||||||
9069 | isVirtualOkay); | ||||||
9070 | if (!NewFD) return nullptr; | ||||||
9071 | |||||||
9072 | if (OriginalLexicalContext && OriginalLexicalContext->isObjCContainer()) | ||||||
9073 | NewFD->setTopLevelDeclInObjCContainer(); | ||||||
9074 | |||||||
9075 | // Set the lexical context. If this is a function-scope declaration, or has a | ||||||
9076 | // C++ scope specifier, or is the object of a friend declaration, the lexical | ||||||
9077 | // context will be different from the semantic context. | ||||||
9078 | NewFD->setLexicalDeclContext(CurContext); | ||||||
9079 | |||||||
9080 | if (IsLocalExternDecl) | ||||||
9081 | NewFD->setLocalExternDecl(); | ||||||
9082 | |||||||
9083 | if (getLangOpts().CPlusPlus) { | ||||||
9084 | bool isInline = D.getDeclSpec().isInlineSpecified(); | ||||||
9085 | bool isVirtual = D.getDeclSpec().isVirtualSpecified(); | ||||||
9086 | bool hasExplicit = D.getDeclSpec().hasExplicitSpecifier(); | ||||||
9087 | isFriend = D.getDeclSpec().isFriendSpecified(); | ||||||
9088 | if (isFriend && !isInline && D.isFunctionDefinition()) { | ||||||
9089 | // C++ [class.friend]p5 | ||||||
9090 | // A function can be defined in a friend declaration of a | ||||||
9091 | // class . . . . Such a function is implicitly inline. | ||||||
9092 | NewFD->setImplicitlyInline(); | ||||||
9093 | } | ||||||
9094 | |||||||
9095 | // If this is a method defined in an __interface, and is not a constructor | ||||||
9096 | // or an overloaded operator, then set the pure flag (isVirtual will already | ||||||
9097 | // return true). | ||||||
9098 | if (const CXXRecordDecl *Parent = | ||||||
9099 | dyn_cast<CXXRecordDecl>(NewFD->getDeclContext())) { | ||||||
9100 | if (Parent->isInterface() && cast<CXXMethodDecl>(NewFD)->isUserProvided()) | ||||||
9101 | NewFD->setPure(true); | ||||||
9102 | |||||||
9103 | // C++ [class.union]p2 | ||||||
9104 | // A union can have member functions, but not virtual functions. | ||||||
9105 | if (isVirtual && Parent->isUnion()) | ||||||
9106 | Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_virtual_in_union); | ||||||
9107 | } | ||||||
9108 | |||||||
9109 | SetNestedNameSpecifier(*this, NewFD, D); | ||||||
9110 | isMemberSpecialization = false; | ||||||
9111 | isFunctionTemplateSpecialization = false; | ||||||
9112 | if (D.isInvalidType()) | ||||||
9113 | NewFD->setInvalidDecl(); | ||||||
9114 | |||||||
9115 | // Match up the template parameter lists with the scope specifier, then | ||||||
9116 | // determine whether we have a template or a template specialization. | ||||||
9117 | bool Invalid = false; | ||||||
9118 | TemplateParameterList *TemplateParams = | ||||||
9119 | MatchTemplateParametersToScopeSpecifier( | ||||||
9120 | D.getDeclSpec().getBeginLoc(), D.getIdentifierLoc(), | ||||||
9121 | D.getCXXScopeSpec(), | ||||||
9122 | D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId | ||||||
9123 | ? D.getName().TemplateId | ||||||
9124 | : nullptr, | ||||||
9125 | TemplateParamLists, isFriend, isMemberSpecialization, | ||||||
9126 | Invalid); | ||||||
9127 | if (TemplateParams) { | ||||||
9128 | // Check that we can declare a template here. | ||||||
9129 | if (CheckTemplateDeclScope(S, TemplateParams)) | ||||||
9130 | NewFD->setInvalidDecl(); | ||||||
9131 | |||||||
9132 | if (TemplateParams->size() > 0) { | ||||||
9133 | // This is a function template | ||||||
9134 | |||||||
9135 | // A destructor cannot be a template. | ||||||
9136 | if (Name.getNameKind() == DeclarationName::CXXDestructorName) { | ||||||
9137 | Diag(NewFD->getLocation(), diag::err_destructor_template); | ||||||
9138 | NewFD->setInvalidDecl(); | ||||||
9139 | } | ||||||
9140 | |||||||
9141 | // If we're adding a template to a dependent context, we may need to | ||||||
9142 | // rebuilding some of the types used within the template parameter list, | ||||||
9143 | // now that we know what the current instantiation is. | ||||||
9144 | if (DC->isDependentContext()) { | ||||||
9145 | ContextRAII SavedContext(*this, DC); | ||||||
9146 | if (RebuildTemplateParamsInCurrentInstantiation(TemplateParams)) | ||||||
9147 | Invalid = true; | ||||||
9148 | } | ||||||
9149 | |||||||
9150 | FunctionTemplate = FunctionTemplateDecl::Create(Context, DC, | ||||||
9151 | NewFD->getLocation(), | ||||||
9152 | Name, TemplateParams, | ||||||
9153 | NewFD); | ||||||
9154 | FunctionTemplate->setLexicalDeclContext(CurContext); | ||||||
9155 | NewFD->setDescribedFunctionTemplate(FunctionTemplate); | ||||||
9156 | |||||||
9157 | // For source fidelity, store the other template param lists. | ||||||
9158 | if (TemplateParamLists.size() > 1) { | ||||||
9159 | NewFD->setTemplateParameterListsInfo(Context, | ||||||
9160 | ArrayRef<TemplateParameterList *>(TemplateParamLists) | ||||||
9161 | .drop_back(1)); | ||||||
9162 | } | ||||||
9163 | } else { | ||||||
9164 | // This is a function template specialization. | ||||||
9165 | isFunctionTemplateSpecialization = true; | ||||||
9166 | // For source fidelity, store all the template param lists. | ||||||
9167 | if (TemplateParamLists.size() > 0) | ||||||
9168 | NewFD->setTemplateParameterListsInfo(Context, TemplateParamLists); | ||||||
9169 | |||||||
9170 | // C++0x [temp.expl.spec]p20 forbids "template<> friend void foo(int);". | ||||||
9171 | if (isFriend) { | ||||||
9172 | // We want to remove the "template<>", found here. | ||||||
9173 | SourceRange RemoveRange = TemplateParams->getSourceRange(); | ||||||
9174 | |||||||
9175 | // If we remove the template<> and the name is not a | ||||||
9176 | // template-id, we're actually silently creating a problem: | ||||||
9177 | // the friend declaration will refer to an untemplated decl, | ||||||
9178 | // and clearly the user wants a template specialization. So | ||||||
9179 | // we need to insert '<>' after the name. | ||||||
9180 | SourceLocation InsertLoc; | ||||||
9181 | if (D.getName().getKind() != UnqualifiedIdKind::IK_TemplateId) { | ||||||
9182 | InsertLoc = D.getName().getSourceRange().getEnd(); | ||||||
9183 | InsertLoc = getLocForEndOfToken(InsertLoc); | ||||||
9184 | } | ||||||
9185 | |||||||
9186 | Diag(D.getIdentifierLoc(), diag::err_template_spec_decl_friend) | ||||||
9187 | << Name << RemoveRange | ||||||
9188 | << FixItHint::CreateRemoval(RemoveRange) | ||||||
9189 | << FixItHint::CreateInsertion(InsertLoc, "<>"); | ||||||
9190 | } | ||||||
9191 | } | ||||||
9192 | } else { | ||||||
9193 | // Check that we can declare a template here. | ||||||
9194 | if (!TemplateParamLists.empty() && isMemberSpecialization && | ||||||
9195 | CheckTemplateDeclScope(S, TemplateParamLists.back())) | ||||||
9196 | NewFD->setInvalidDecl(); | ||||||
9197 | |||||||
9198 | // All template param lists were matched against the scope specifier: | ||||||
9199 | // this is NOT (an explicit specialization of) a template. | ||||||
9200 | if (TemplateParamLists.size() > 0) | ||||||
9201 | // For source fidelity, store all the template param lists. | ||||||
9202 | NewFD->setTemplateParameterListsInfo(Context, TemplateParamLists); | ||||||
9203 | } | ||||||
9204 | |||||||
9205 | if (Invalid) { | ||||||
9206 | NewFD->setInvalidDecl(); | ||||||
9207 | if (FunctionTemplate) | ||||||
9208 | FunctionTemplate->setInvalidDecl(); | ||||||
9209 | } | ||||||
9210 | |||||||
9211 | // C++ [dcl.fct.spec]p5: | ||||||
9212 | // The virtual specifier shall only be used in declarations of | ||||||
9213 | // nonstatic class member functions that appear within a | ||||||
9214 | // member-specification of a class declaration; see 10.3. | ||||||
9215 | // | ||||||
9216 | if (isVirtual && !NewFD->isInvalidDecl()) { | ||||||
9217 | if (!isVirtualOkay) { | ||||||
9218 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
9219 | diag::err_virtual_non_function); | ||||||
9220 | } else if (!CurContext->isRecord()) { | ||||||
9221 | // 'virtual' was specified outside of the class. | ||||||
9222 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
9223 | diag::err_virtual_out_of_class) | ||||||
9224 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); | ||||||
9225 | } else if (NewFD->getDescribedFunctionTemplate()) { | ||||||
9226 | // C++ [temp.mem]p3: | ||||||
9227 | // A member function template shall not be virtual. | ||||||
9228 | Diag(D.getDeclSpec().getVirtualSpecLoc(), | ||||||
9229 | diag::err_virtual_member_function_template) | ||||||
9230 | << FixItHint::CreateRemoval(D.getDeclSpec().getVirtualSpecLoc()); | ||||||
9231 | } else { | ||||||
9232 | // Okay: Add virtual to the method. | ||||||
9233 | NewFD->setVirtualAsWritten(true); | ||||||
9234 | } | ||||||
9235 | |||||||
9236 | if (getLangOpts().CPlusPlus14 && | ||||||
9237 | NewFD->getReturnType()->isUndeducedType()) | ||||||
9238 | Diag(D.getDeclSpec().getVirtualSpecLoc(), diag::err_auto_fn_virtual); | ||||||
9239 | } | ||||||
9240 | |||||||
9241 | if (getLangOpts().CPlusPlus14 && | ||||||
9242 | (NewFD->isDependentContext() || | ||||||
9243 | (isFriend && CurContext->isDependentContext())) && | ||||||
9244 | NewFD->getReturnType()->isUndeducedType()) { | ||||||
9245 | // If the function template is referenced directly (for instance, as a | ||||||
9246 | // member of the current instantiation), pretend it has a dependent type. | ||||||
9247 | // This is not really justified by the standard, but is the only sane | ||||||
9248 | // thing to do. | ||||||
9249 | // FIXME: For a friend function, we have not marked the function as being | ||||||
9250 | // a friend yet, so 'isDependentContext' on the FD doesn't work. | ||||||
9251 | const FunctionProtoType *FPT = | ||||||
9252 | NewFD->getType()->castAs<FunctionProtoType>(); | ||||||
9253 | QualType Result = | ||||||
9254 | SubstAutoType(FPT->getReturnType(), Context.DependentTy); | ||||||
9255 | NewFD->setType(Context.getFunctionType(Result, FPT->getParamTypes(), | ||||||
9256 | FPT->getExtProtoInfo())); | ||||||
9257 | } | ||||||
9258 | |||||||
9259 | // C++ [dcl.fct.spec]p3: | ||||||
9260 | // The inline specifier shall not appear on a block scope function | ||||||
9261 | // declaration. | ||||||
9262 | if (isInline && !NewFD->isInvalidDecl()) { | ||||||
9263 | if (CurContext->isFunctionOrMethod()) { | ||||||
9264 | // 'inline' is not allowed on block scope function declaration. | ||||||
9265 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
9266 | diag::err_inline_declaration_block_scope) << Name | ||||||
9267 | << FixItHint::CreateRemoval(D.getDeclSpec().getInlineSpecLoc()); | ||||||
9268 | } | ||||||
9269 | } | ||||||
9270 | |||||||
9271 | // C++ [dcl.fct.spec]p6: | ||||||
9272 | // The explicit specifier shall be used only in the declaration of a | ||||||
9273 | // constructor or conversion function within its class definition; | ||||||
9274 | // see 12.3.1 and 12.3.2. | ||||||
9275 | if (hasExplicit && !NewFD->isInvalidDecl() && | ||||||
9276 | !isa<CXXDeductionGuideDecl>(NewFD)) { | ||||||
9277 | if (!CurContext->isRecord()) { | ||||||
9278 | // 'explicit' was specified outside of the class. | ||||||
9279 | Diag(D.getDeclSpec().getExplicitSpecLoc(), | ||||||
9280 | diag::err_explicit_out_of_class) | ||||||
9281 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecRange()); | ||||||
9282 | } else if (!isa<CXXConstructorDecl>(NewFD) && | ||||||
9283 | !isa<CXXConversionDecl>(NewFD)) { | ||||||
9284 | // 'explicit' was specified on a function that wasn't a constructor | ||||||
9285 | // or conversion function. | ||||||
9286 | Diag(D.getDeclSpec().getExplicitSpecLoc(), | ||||||
9287 | diag::err_explicit_non_ctor_or_conv_function) | ||||||
9288 | << FixItHint::CreateRemoval(D.getDeclSpec().getExplicitSpecRange()); | ||||||
9289 | } | ||||||
9290 | } | ||||||
9291 | |||||||
9292 | ConstexprSpecKind ConstexprKind = D.getDeclSpec().getConstexprSpecifier(); | ||||||
9293 | if (ConstexprKind != ConstexprSpecKind::Unspecified) { | ||||||
9294 | // C++11 [dcl.constexpr]p2: constexpr functions and constexpr constructors | ||||||
9295 | // are implicitly inline. | ||||||
9296 | NewFD->setImplicitlyInline(); | ||||||
9297 | |||||||
9298 | // C++11 [dcl.constexpr]p3: functions declared constexpr are required to | ||||||
9299 | // be either constructors or to return a literal type. Therefore, | ||||||
9300 | // destructors cannot be declared constexpr. | ||||||
9301 | if (isa<CXXDestructorDecl>(NewFD) && | ||||||
9302 | (!getLangOpts().CPlusPlus20 || | ||||||
9303 | ConstexprKind == ConstexprSpecKind::Consteval)) { | ||||||
9304 | Diag(D.getDeclSpec().getConstexprSpecLoc(), diag::err_constexpr_dtor) | ||||||
9305 | << static_cast<int>(ConstexprKind); | ||||||
9306 | NewFD->setConstexprKind(getLangOpts().CPlusPlus20 | ||||||
9307 | ? ConstexprSpecKind::Unspecified | ||||||
9308 | : ConstexprSpecKind::Constexpr); | ||||||
9309 | } | ||||||
9310 | // C++20 [dcl.constexpr]p2: An allocation function, or a | ||||||
9311 | // deallocation function shall not be declared with the consteval | ||||||
9312 | // specifier. | ||||||
9313 | if (ConstexprKind == ConstexprSpecKind::Consteval && | ||||||
9314 | (NewFD->getOverloadedOperator() == OO_New || | ||||||
9315 | NewFD->getOverloadedOperator() == OO_Array_New || | ||||||
9316 | NewFD->getOverloadedOperator() == OO_Delete || | ||||||
9317 | NewFD->getOverloadedOperator() == OO_Array_Delete)) { | ||||||
9318 | Diag(D.getDeclSpec().getConstexprSpecLoc(), | ||||||
9319 | diag::err_invalid_consteval_decl_kind) | ||||||
9320 | << NewFD; | ||||||
9321 | NewFD->setConstexprKind(ConstexprSpecKind::Constexpr); | ||||||
9322 | } | ||||||
9323 | } | ||||||
9324 | |||||||
9325 | // If __module_private__ was specified, mark the function accordingly. | ||||||
9326 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
9327 | if (isFunctionTemplateSpecialization) { | ||||||
9328 | SourceLocation ModulePrivateLoc | ||||||
9329 | = D.getDeclSpec().getModulePrivateSpecLoc(); | ||||||
9330 | Diag(ModulePrivateLoc, diag::err_module_private_specialization) | ||||||
9331 | << 0 | ||||||
9332 | << FixItHint::CreateRemoval(ModulePrivateLoc); | ||||||
9333 | } else { | ||||||
9334 | NewFD->setModulePrivate(); | ||||||
9335 | if (FunctionTemplate) | ||||||
9336 | FunctionTemplate->setModulePrivate(); | ||||||
9337 | } | ||||||
9338 | } | ||||||
9339 | |||||||
9340 | if (isFriend) { | ||||||
9341 | if (FunctionTemplate) { | ||||||
9342 | FunctionTemplate->setObjectOfFriendDecl(); | ||||||
9343 | FunctionTemplate->setAccess(AS_public); | ||||||
9344 | } | ||||||
9345 | NewFD->setObjectOfFriendDecl(); | ||||||
9346 | NewFD->setAccess(AS_public); | ||||||
9347 | } | ||||||
9348 | |||||||
9349 | // If a function is defined as defaulted or deleted, mark it as such now. | ||||||
9350 | // We'll do the relevant checks on defaulted / deleted functions later. | ||||||
9351 | switch (D.getFunctionDefinitionKind()) { | ||||||
9352 | case FunctionDefinitionKind::Declaration: | ||||||
9353 | case FunctionDefinitionKind::Definition: | ||||||
9354 | break; | ||||||
9355 | |||||||
9356 | case FunctionDefinitionKind::Defaulted: | ||||||
9357 | NewFD->setDefaulted(); | ||||||
9358 | break; | ||||||
9359 | |||||||
9360 | case FunctionDefinitionKind::Deleted: | ||||||
9361 | NewFD->setDeletedAsWritten(); | ||||||
9362 | break; | ||||||
9363 | } | ||||||
9364 | |||||||
9365 | if (isa<CXXMethodDecl>(NewFD) && DC == CurContext && | ||||||
9366 | D.isFunctionDefinition()) { | ||||||
9367 | // C++ [class.mfct]p2: | ||||||
9368 | // A member function may be defined (8.4) in its class definition, in | ||||||
9369 | // which case it is an inline member function (7.1.2) | ||||||
9370 | NewFD->setImplicitlyInline(); | ||||||
9371 | } | ||||||
9372 | |||||||
9373 | if (SC == SC_Static && isa<CXXMethodDecl>(NewFD) && | ||||||
9374 | !CurContext->isRecord()) { | ||||||
9375 | // C++ [class.static]p1: | ||||||
9376 | // A data or function member of a class may be declared static | ||||||
9377 | // in a class definition, in which case it is a static member of | ||||||
9378 | // the class. | ||||||
9379 | |||||||
9380 | // Complain about the 'static' specifier if it's on an out-of-line | ||||||
9381 | // member function definition. | ||||||
9382 | |||||||
9383 | // MSVC permits the use of a 'static' storage specifier on an out-of-line | ||||||
9384 | // member function template declaration and class member template | ||||||
9385 | // declaration (MSVC versions before 2015), warn about this. | ||||||
9386 | Diag(D.getDeclSpec().getStorageClassSpecLoc(), | ||||||
9387 | ((!getLangOpts().isCompatibleWithMSVC(LangOptions::MSVC2015) && | ||||||
9388 | cast<CXXRecordDecl>(DC)->getDescribedClassTemplate()) || | ||||||
9389 | (getLangOpts().MSVCCompat && NewFD->getDescribedFunctionTemplate())) | ||||||
9390 | ? diag::ext_static_out_of_line : diag::err_static_out_of_line) | ||||||
9391 | << FixItHint::CreateRemoval(D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9392 | } | ||||||
9393 | |||||||
9394 | // C++11 [except.spec]p15: | ||||||
9395 | // A deallocation function with no exception-specification is treated | ||||||
9396 | // as if it were specified with noexcept(true). | ||||||
9397 | const FunctionProtoType *FPT = R->getAs<FunctionProtoType>(); | ||||||
9398 | if ((Name.getCXXOverloadedOperator() == OO_Delete || | ||||||
9399 | Name.getCXXOverloadedOperator() == OO_Array_Delete) && | ||||||
9400 | getLangOpts().CPlusPlus11 && FPT && !FPT->hasExceptionSpec()) | ||||||
9401 | NewFD->setType(Context.getFunctionType( | ||||||
9402 | FPT->getReturnType(), FPT->getParamTypes(), | ||||||
9403 | FPT->getExtProtoInfo().withExceptionSpec(EST_BasicNoexcept))); | ||||||
9404 | } | ||||||
9405 | |||||||
9406 | // Filter out previous declarations that don't match the scope. | ||||||
9407 | FilterLookupForScope(Previous, OriginalDC, S, shouldConsiderLinkage(NewFD), | ||||||
9408 | D.getCXXScopeSpec().isNotEmpty() || | ||||||
9409 | isMemberSpecialization || | ||||||
9410 | isFunctionTemplateSpecialization); | ||||||
9411 | |||||||
9412 | // Handle GNU asm-label extension (encoded as an attribute). | ||||||
9413 | if (Expr *E = (Expr*) D.getAsmLabel()) { | ||||||
9414 | // The parser guarantees this is a string. | ||||||
9415 | StringLiteral *SE = cast<StringLiteral>(E); | ||||||
9416 | NewFD->addAttr(AsmLabelAttr::Create(Context, SE->getString(), | ||||||
9417 | /*IsLiteralLabel=*/true, | ||||||
9418 | SE->getStrTokenLoc(0))); | ||||||
9419 | } else if (!ExtnameUndeclaredIdentifiers.empty()) { | ||||||
9420 | llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*>::iterator I = | ||||||
9421 | ExtnameUndeclaredIdentifiers.find(NewFD->getIdentifier()); | ||||||
9422 | if (I != ExtnameUndeclaredIdentifiers.end()) { | ||||||
9423 | if (isDeclExternC(NewFD)) { | ||||||
9424 | NewFD->addAttr(I->second); | ||||||
9425 | ExtnameUndeclaredIdentifiers.erase(I); | ||||||
9426 | } else | ||||||
9427 | Diag(NewFD->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
9428 | << /*Variable*/0 << NewFD; | ||||||
9429 | } | ||||||
9430 | } | ||||||
9431 | |||||||
9432 | // Copy the parameter declarations from the declarator D to the function | ||||||
9433 | // declaration NewFD, if they are available. First scavenge them into Params. | ||||||
9434 | SmallVector<ParmVarDecl*, 16> Params; | ||||||
9435 | unsigned FTIIdx; | ||||||
9436 | if (D.isFunctionDeclarator(FTIIdx)) { | ||||||
9437 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getTypeObject(FTIIdx).Fun; | ||||||
9438 | |||||||
9439 | // Check for C99 6.7.5.3p10 - foo(void) is a non-varargs | ||||||
9440 | // function that takes no arguments, not a function that takes a | ||||||
9441 | // single void argument. | ||||||
9442 | // We let through "const void" here because Sema::GetTypeForDeclarator | ||||||
9443 | // already checks for that case. | ||||||
9444 | if (FTIHasNonVoidParameters(FTI) && FTI.Params[0].Param) { | ||||||
9445 | for (unsigned i = 0, e = FTI.NumParams; i != e; ++i) { | ||||||
9446 | ParmVarDecl *Param = cast<ParmVarDecl>(FTI.Params[i].Param); | ||||||
9447 | assert(Param->getDeclContext() != NewFD && "Was set before ?")(static_cast <bool> (Param->getDeclContext() != NewFD && "Was set before ?") ? void (0) : __assert_fail ("Param->getDeclContext() != NewFD && \"Was set before ?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9447, __extension__ __PRETTY_FUNCTION__)); | ||||||
9448 | Param->setDeclContext(NewFD); | ||||||
9449 | Params.push_back(Param); | ||||||
9450 | |||||||
9451 | if (Param->isInvalidDecl()) | ||||||
9452 | NewFD->setInvalidDecl(); | ||||||
9453 | } | ||||||
9454 | } | ||||||
9455 | |||||||
9456 | if (!getLangOpts().CPlusPlus) { | ||||||
9457 | // In C, find all the tag declarations from the prototype and move them | ||||||
9458 | // into the function DeclContext. Remove them from the surrounding tag | ||||||
9459 | // injection context of the function, which is typically but not always | ||||||
9460 | // the TU. | ||||||
9461 | DeclContext *PrototypeTagContext = | ||||||
9462 | getTagInjectionContext(NewFD->getLexicalDeclContext()); | ||||||
9463 | for (NamedDecl *NonParmDecl : FTI.getDeclsInPrototype()) { | ||||||
9464 | auto *TD = dyn_cast<TagDecl>(NonParmDecl); | ||||||
9465 | |||||||
9466 | // We don't want to reparent enumerators. Look at their parent enum | ||||||
9467 | // instead. | ||||||
9468 | if (!TD) { | ||||||
9469 | if (auto *ECD = dyn_cast<EnumConstantDecl>(NonParmDecl)) | ||||||
9470 | TD = cast<EnumDecl>(ECD->getDeclContext()); | ||||||
9471 | } | ||||||
9472 | if (!TD) | ||||||
9473 | continue; | ||||||
9474 | DeclContext *TagDC = TD->getLexicalDeclContext(); | ||||||
9475 | if (!TagDC->containsDecl(TD)) | ||||||
9476 | continue; | ||||||
9477 | TagDC->removeDecl(TD); | ||||||
9478 | TD->setDeclContext(NewFD); | ||||||
9479 | NewFD->addDecl(TD); | ||||||
9480 | |||||||
9481 | // Preserve the lexical DeclContext if it is not the surrounding tag | ||||||
9482 | // injection context of the FD. In this example, the semantic context of | ||||||
9483 | // E will be f and the lexical context will be S, while both the | ||||||
9484 | // semantic and lexical contexts of S will be f: | ||||||
9485 | // void f(struct S { enum E { a } f; } s); | ||||||
9486 | if (TagDC != PrototypeTagContext) | ||||||
9487 | TD->setLexicalDeclContext(TagDC); | ||||||
9488 | } | ||||||
9489 | } | ||||||
9490 | } else if (const FunctionProtoType *FT = R->getAs<FunctionProtoType>()) { | ||||||
9491 | // When we're declaring a function with a typedef, typeof, etc as in the | ||||||
9492 | // following example, we'll need to synthesize (unnamed) | ||||||
9493 | // parameters for use in the declaration. | ||||||
9494 | // | ||||||
9495 | // @code | ||||||
9496 | // typedef void fn(int); | ||||||
9497 | // fn f; | ||||||
9498 | // @endcode | ||||||
9499 | |||||||
9500 | // Synthesize a parameter for each argument type. | ||||||
9501 | for (const auto &AI : FT->param_types()) { | ||||||
9502 | ParmVarDecl *Param = | ||||||
9503 | BuildParmVarDeclForTypedef(NewFD, D.getIdentifierLoc(), AI); | ||||||
9504 | Param->setScopeInfo(0, Params.size()); | ||||||
9505 | Params.push_back(Param); | ||||||
9506 | } | ||||||
9507 | } else { | ||||||
9508 | assert(R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 &&(static_cast <bool> (R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && "Should not need args for typedef of non-prototype fn" ) ? void (0) : __assert_fail ("R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && \"Should not need args for typedef of non-prototype fn\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9509, __extension__ __PRETTY_FUNCTION__)) | ||||||
9509 | "Should not need args for typedef of non-prototype fn")(static_cast <bool> (R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && "Should not need args for typedef of non-prototype fn" ) ? void (0) : __assert_fail ("R->isFunctionNoProtoType() && NewFD->getNumParams() == 0 && \"Should not need args for typedef of non-prototype fn\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9509, __extension__ __PRETTY_FUNCTION__)); | ||||||
9510 | } | ||||||
9511 | |||||||
9512 | // Finally, we know we have the right number of parameters, install them. | ||||||
9513 | NewFD->setParams(Params); | ||||||
9514 | |||||||
9515 | if (D.getDeclSpec().isNoreturnSpecified()) | ||||||
9516 | NewFD->addAttr(C11NoReturnAttr::Create(Context, | ||||||
9517 | D.getDeclSpec().getNoreturnSpecLoc(), | ||||||
9518 | AttributeCommonInfo::AS_Keyword)); | ||||||
9519 | |||||||
9520 | // Functions returning a variably modified type violate C99 6.7.5.2p2 | ||||||
9521 | // because all functions have linkage. | ||||||
9522 | if (!NewFD->isInvalidDecl() && | ||||||
9523 | NewFD->getReturnType()->isVariablyModifiedType()) { | ||||||
9524 | Diag(NewFD->getLocation(), diag::err_vm_func_decl); | ||||||
9525 | NewFD->setInvalidDecl(); | ||||||
9526 | } | ||||||
9527 | |||||||
9528 | // Apply an implicit SectionAttr if '#pragma clang section text' is active | ||||||
9529 | if (PragmaClangTextSection.Valid && D.isFunctionDefinition() && | ||||||
9530 | !NewFD->hasAttr<SectionAttr>()) | ||||||
9531 | NewFD->addAttr(PragmaClangTextSectionAttr::CreateImplicit( | ||||||
9532 | Context, PragmaClangTextSection.SectionName, | ||||||
9533 | PragmaClangTextSection.PragmaLocation, AttributeCommonInfo::AS_Pragma)); | ||||||
9534 | |||||||
9535 | // Apply an implicit SectionAttr if #pragma code_seg is active. | ||||||
9536 | if (CodeSegStack.CurrentValue && D.isFunctionDefinition() && | ||||||
9537 | !NewFD->hasAttr<SectionAttr>()) { | ||||||
9538 | NewFD->addAttr(SectionAttr::CreateImplicit( | ||||||
9539 | Context, CodeSegStack.CurrentValue->getString(), | ||||||
9540 | CodeSegStack.CurrentPragmaLocation, AttributeCommonInfo::AS_Pragma, | ||||||
9541 | SectionAttr::Declspec_allocate)); | ||||||
9542 | if (UnifySection(CodeSegStack.CurrentValue->getString(), | ||||||
9543 | ASTContext::PSF_Implicit | ASTContext::PSF_Execute | | ||||||
9544 | ASTContext::PSF_Read, | ||||||
9545 | NewFD)) | ||||||
9546 | NewFD->dropAttr<SectionAttr>(); | ||||||
9547 | } | ||||||
9548 | |||||||
9549 | // Apply an implicit CodeSegAttr from class declspec or | ||||||
9550 | // apply an implicit SectionAttr from #pragma code_seg if active. | ||||||
9551 | if (!NewFD->hasAttr<CodeSegAttr>()) { | ||||||
9552 | if (Attr *SAttr = getImplicitCodeSegOrSectionAttrForFunction(NewFD, | ||||||
9553 | D.isFunctionDefinition())) { | ||||||
9554 | NewFD->addAttr(SAttr); | ||||||
9555 | } | ||||||
9556 | } | ||||||
9557 | |||||||
9558 | // Handle attributes. | ||||||
9559 | ProcessDeclAttributes(S, NewFD, D); | ||||||
9560 | |||||||
9561 | if (getLangOpts().OpenCL) { | ||||||
9562 | // OpenCL v1.1 s6.5: Using an address space qualifier in a function return | ||||||
9563 | // type declaration will generate a compilation error. | ||||||
9564 | LangAS AddressSpace = NewFD->getReturnType().getAddressSpace(); | ||||||
9565 | if (AddressSpace != LangAS::Default) { | ||||||
9566 | Diag(NewFD->getLocation(), | ||||||
9567 | diag::err_opencl_return_value_with_address_space); | ||||||
9568 | NewFD->setInvalidDecl(); | ||||||
9569 | } | ||||||
9570 | } | ||||||
9571 | |||||||
9572 | if (LangOpts.SYCLIsDevice || (LangOpts.OpenMP && LangOpts.OpenMPIsDevice)) | ||||||
9573 | checkDeviceDecl(NewFD, D.getBeginLoc()); | ||||||
9574 | |||||||
9575 | if (!getLangOpts().CPlusPlus) { | ||||||
9576 | // Perform semantic checking on the function declaration. | ||||||
9577 | if (!NewFD->isInvalidDecl() && NewFD->isMain()) | ||||||
9578 | CheckMain(NewFD, D.getDeclSpec()); | ||||||
9579 | |||||||
9580 | if (!NewFD->isInvalidDecl() && NewFD->isMSVCRTEntryPoint()) | ||||||
9581 | CheckMSVCRTEntryPoint(NewFD); | ||||||
9582 | |||||||
9583 | if (!NewFD->isInvalidDecl()) | ||||||
9584 | D.setRedeclaration(CheckFunctionDeclaration(S, NewFD, Previous, | ||||||
9585 | isMemberSpecialization)); | ||||||
9586 | else if (!Previous.empty()) | ||||||
9587 | // Recover gracefully from an invalid redeclaration. | ||||||
9588 | D.setRedeclaration(true); | ||||||
9589 | assert((NewFD->isInvalidDecl() || !D.isRedeclaration() ||(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9591, __extension__ __PRETTY_FUNCTION__)) | ||||||
9590 | Previous.getResultKind() != LookupResult::FoundOverloaded) &&(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9591, __extension__ __PRETTY_FUNCTION__)) | ||||||
9591 | "previous declaration set still overloaded")(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9591, __extension__ __PRETTY_FUNCTION__)); | ||||||
9592 | |||||||
9593 | // Diagnose no-prototype function declarations with calling conventions that | ||||||
9594 | // don't support variadic calls. Only do this in C and do it after merging | ||||||
9595 | // possibly prototyped redeclarations. | ||||||
9596 | const FunctionType *FT = NewFD->getType()->castAs<FunctionType>(); | ||||||
9597 | if (isa<FunctionNoProtoType>(FT) && !D.isFunctionDefinition()) { | ||||||
9598 | CallingConv CC = FT->getExtInfo().getCC(); | ||||||
9599 | if (!supportsVariadicCall(CC)) { | ||||||
9600 | // Windows system headers sometimes accidentally use stdcall without | ||||||
9601 | // (void) parameters, so we relax this to a warning. | ||||||
9602 | int DiagID = | ||||||
9603 | CC == CC_X86StdCall ? diag::warn_cconv_knr : diag::err_cconv_knr; | ||||||
9604 | Diag(NewFD->getLocation(), DiagID) | ||||||
9605 | << FunctionType::getNameForCallConv(CC); | ||||||
9606 | } | ||||||
9607 | } | ||||||
9608 | |||||||
9609 | if (NewFD->getReturnType().hasNonTrivialToPrimitiveDestructCUnion() || | ||||||
9610 | NewFD->getReturnType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
9611 | checkNonTrivialCUnion(NewFD->getReturnType(), | ||||||
9612 | NewFD->getReturnTypeSourceRange().getBegin(), | ||||||
9613 | NTCUC_FunctionReturn, NTCUK_Destruct|NTCUK_Copy); | ||||||
9614 | } else { | ||||||
9615 | // C++11 [replacement.functions]p3: | ||||||
9616 | // The program's definitions shall not be specified as inline. | ||||||
9617 | // | ||||||
9618 | // N.B. We diagnose declarations instead of definitions per LWG issue 2340. | ||||||
9619 | // | ||||||
9620 | // Suppress the diagnostic if the function is __attribute__((used)), since | ||||||
9621 | // that forces an external definition to be emitted. | ||||||
9622 | if (D.getDeclSpec().isInlineSpecified() && | ||||||
9623 | NewFD->isReplaceableGlobalAllocationFunction() && | ||||||
9624 | !NewFD->hasAttr<UsedAttr>()) | ||||||
9625 | Diag(D.getDeclSpec().getInlineSpecLoc(), | ||||||
9626 | diag::ext_operator_new_delete_declared_inline) | ||||||
9627 | << NewFD->getDeclName(); | ||||||
9628 | |||||||
9629 | // If the declarator is a template-id, translate the parser's template | ||||||
9630 | // argument list into our AST format. | ||||||
9631 | if (D.getName().getKind() == UnqualifiedIdKind::IK_TemplateId) { | ||||||
9632 | TemplateIdAnnotation *TemplateId = D.getName().TemplateId; | ||||||
9633 | TemplateArgs.setLAngleLoc(TemplateId->LAngleLoc); | ||||||
9634 | TemplateArgs.setRAngleLoc(TemplateId->RAngleLoc); | ||||||
9635 | ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(), | ||||||
9636 | TemplateId->NumArgs); | ||||||
9637 | translateTemplateArguments(TemplateArgsPtr, | ||||||
9638 | TemplateArgs); | ||||||
9639 | |||||||
9640 | HasExplicitTemplateArgs = true; | ||||||
9641 | |||||||
9642 | if (NewFD->isInvalidDecl()) { | ||||||
9643 | HasExplicitTemplateArgs = false; | ||||||
9644 | } else if (FunctionTemplate) { | ||||||
9645 | // Function template with explicit template arguments. | ||||||
9646 | Diag(D.getIdentifierLoc(), diag::err_function_template_partial_spec) | ||||||
9647 | << SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc); | ||||||
9648 | |||||||
9649 | HasExplicitTemplateArgs = false; | ||||||
9650 | } else { | ||||||
9651 | assert((isFunctionTemplateSpecialization ||(static_cast <bool> ((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9653, __extension__ __PRETTY_FUNCTION__)) | ||||||
9652 | D.getDeclSpec().isFriendSpecified()) &&(static_cast <bool> ((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9653, __extension__ __PRETTY_FUNCTION__)) | ||||||
9653 | "should have a 'template<>' for this decl")(static_cast <bool> ((isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && "should have a 'template<>' for this decl" ) ? void (0) : __assert_fail ("(isFunctionTemplateSpecialization || D.getDeclSpec().isFriendSpecified()) && \"should have a 'template<>' for this decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9653, __extension__ __PRETTY_FUNCTION__)); | ||||||
9654 | // "friend void foo<>(int);" is an implicit specialization decl. | ||||||
9655 | isFunctionTemplateSpecialization = true; | ||||||
9656 | } | ||||||
9657 | } else if (isFriend && isFunctionTemplateSpecialization) { | ||||||
9658 | // This combination is only possible in a recovery case; the user | ||||||
9659 | // wrote something like: | ||||||
9660 | // template <> friend void foo(int); | ||||||
9661 | // which we're recovering from as if the user had written: | ||||||
9662 | // friend void foo<>(int); | ||||||
9663 | // Go ahead and fake up a template id. | ||||||
9664 | HasExplicitTemplateArgs = true; | ||||||
9665 | TemplateArgs.setLAngleLoc(D.getIdentifierLoc()); | ||||||
9666 | TemplateArgs.setRAngleLoc(D.getIdentifierLoc()); | ||||||
9667 | } | ||||||
9668 | |||||||
9669 | // We do not add HD attributes to specializations here because | ||||||
9670 | // they may have different constexpr-ness compared to their | ||||||
9671 | // templates and, after maybeAddCUDAHostDeviceAttrs() is applied, | ||||||
9672 | // may end up with different effective targets. Instead, a | ||||||
9673 | // specialization inherits its target attributes from its template | ||||||
9674 | // in the CheckFunctionTemplateSpecialization() call below. | ||||||
9675 | if (getLangOpts().CUDA && !isFunctionTemplateSpecialization) | ||||||
9676 | maybeAddCUDAHostDeviceAttrs(NewFD, Previous); | ||||||
9677 | |||||||
9678 | // If it's a friend (and only if it's a friend), it's possible | ||||||
9679 | // that either the specialized function type or the specialized | ||||||
9680 | // template is dependent, and therefore matching will fail. In | ||||||
9681 | // this case, don't check the specialization yet. | ||||||
9682 | if (isFunctionTemplateSpecialization && isFriend && | ||||||
9683 | (NewFD->getType()->isDependentType() || DC->isDependentContext() || | ||||||
9684 | TemplateSpecializationType::anyInstantiationDependentTemplateArguments( | ||||||
9685 | TemplateArgs.arguments()))) { | ||||||
9686 | assert(HasExplicitTemplateArgs &&(static_cast <bool> (HasExplicitTemplateArgs && "friend function specialization without template args") ? void (0) : __assert_fail ("HasExplicitTemplateArgs && \"friend function specialization without template args\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9687, __extension__ __PRETTY_FUNCTION__)) | ||||||
9687 | "friend function specialization without template args")(static_cast <bool> (HasExplicitTemplateArgs && "friend function specialization without template args") ? void (0) : __assert_fail ("HasExplicitTemplateArgs && \"friend function specialization without template args\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9687, __extension__ __PRETTY_FUNCTION__)); | ||||||
9688 | if (CheckDependentFunctionTemplateSpecialization(NewFD, TemplateArgs, | ||||||
9689 | Previous)) | ||||||
9690 | NewFD->setInvalidDecl(); | ||||||
9691 | } else if (isFunctionTemplateSpecialization) { | ||||||
9692 | if (CurContext->isDependentContext() && CurContext->isRecord() | ||||||
9693 | && !isFriend) { | ||||||
9694 | isDependentClassScopeExplicitSpecialization = true; | ||||||
9695 | } else if (!NewFD->isInvalidDecl() && | ||||||
9696 | CheckFunctionTemplateSpecialization( | ||||||
9697 | NewFD, (HasExplicitTemplateArgs ? &TemplateArgs : nullptr), | ||||||
9698 | Previous)) | ||||||
9699 | NewFD->setInvalidDecl(); | ||||||
9700 | |||||||
9701 | // C++ [dcl.stc]p1: | ||||||
9702 | // A storage-class-specifier shall not be specified in an explicit | ||||||
9703 | // specialization (14.7.3) | ||||||
9704 | FunctionTemplateSpecializationInfo *Info = | ||||||
9705 | NewFD->getTemplateSpecializationInfo(); | ||||||
9706 | if (Info && SC != SC_None) { | ||||||
9707 | if (SC != Info->getTemplate()->getTemplatedDecl()->getStorageClass()) | ||||||
9708 | Diag(NewFD->getLocation(), | ||||||
9709 | diag::err_explicit_specialization_inconsistent_storage_class) | ||||||
9710 | << SC | ||||||
9711 | << FixItHint::CreateRemoval( | ||||||
9712 | D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9713 | |||||||
9714 | else | ||||||
9715 | Diag(NewFD->getLocation(), | ||||||
9716 | diag::ext_explicit_specialization_storage_class) | ||||||
9717 | << FixItHint::CreateRemoval( | ||||||
9718 | D.getDeclSpec().getStorageClassSpecLoc()); | ||||||
9719 | } | ||||||
9720 | } else if (isMemberSpecialization && isa<CXXMethodDecl>(NewFD)) { | ||||||
9721 | if (CheckMemberSpecialization(NewFD, Previous)) | ||||||
9722 | NewFD->setInvalidDecl(); | ||||||
9723 | } | ||||||
9724 | |||||||
9725 | // Perform semantic checking on the function declaration. | ||||||
9726 | if (!isDependentClassScopeExplicitSpecialization) { | ||||||
9727 | if (!NewFD->isInvalidDecl() && NewFD->isMain()) | ||||||
9728 | CheckMain(NewFD, D.getDeclSpec()); | ||||||
9729 | |||||||
9730 | if (!NewFD->isInvalidDecl() && NewFD->isMSVCRTEntryPoint()) | ||||||
9731 | CheckMSVCRTEntryPoint(NewFD); | ||||||
9732 | |||||||
9733 | if (!NewFD->isInvalidDecl()) | ||||||
9734 | D.setRedeclaration(CheckFunctionDeclaration(S, NewFD, Previous, | ||||||
9735 | isMemberSpecialization)); | ||||||
9736 | else if (!Previous.empty()) | ||||||
9737 | // Recover gracefully from an invalid redeclaration. | ||||||
9738 | D.setRedeclaration(true); | ||||||
9739 | } | ||||||
9740 | |||||||
9741 | assert((NewFD->isInvalidDecl() || !D.isRedeclaration() ||(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9743, __extension__ __PRETTY_FUNCTION__)) | ||||||
9742 | Previous.getResultKind() != LookupResult::FoundOverloaded) &&(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9743, __extension__ __PRETTY_FUNCTION__)) | ||||||
9743 | "previous declaration set still overloaded")(static_cast <bool> ((NewFD->isInvalidDecl() || !D.isRedeclaration () || Previous.getResultKind() != LookupResult::FoundOverloaded ) && "previous declaration set still overloaded") ? void (0) : __assert_fail ("(NewFD->isInvalidDecl() || !D.isRedeclaration() || Previous.getResultKind() != LookupResult::FoundOverloaded) && \"previous declaration set still overloaded\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 9743, __extension__ __PRETTY_FUNCTION__)); | ||||||
9744 | |||||||
9745 | NamedDecl *PrincipalDecl = (FunctionTemplate | ||||||
9746 | ? cast<NamedDecl>(FunctionTemplate) | ||||||
9747 | : NewFD); | ||||||
9748 | |||||||
9749 | if (isFriend && NewFD->getPreviousDecl()) { | ||||||
9750 | AccessSpecifier Access = AS_public; | ||||||
9751 | if (!NewFD->isInvalidDecl()) | ||||||
9752 | Access = NewFD->getPreviousDecl()->getAccess(); | ||||||
9753 | |||||||
9754 | NewFD->setAccess(Access); | ||||||
9755 | if (FunctionTemplate) FunctionTemplate->setAccess(Access); | ||||||
9756 | } | ||||||
9757 | |||||||
9758 | if (NewFD->isOverloadedOperator() && !DC->isRecord() && | ||||||
9759 | PrincipalDecl->isInIdentifierNamespace(Decl::IDNS_Ordinary)) | ||||||
9760 | PrincipalDecl->setNonMemberOperator(); | ||||||
9761 | |||||||
9762 | // If we have a function template, check the template parameter | ||||||
9763 | // list. This will check and merge default template arguments. | ||||||
9764 | if (FunctionTemplate) { | ||||||
9765 | FunctionTemplateDecl *PrevTemplate = | ||||||
9766 | FunctionTemplate->getPreviousDecl(); | ||||||
9767 | CheckTemplateParameterList(FunctionTemplate->getTemplateParameters(), | ||||||
9768 | PrevTemplate ? PrevTemplate->getTemplateParameters() | ||||||
9769 | : nullptr, | ||||||
9770 | D.getDeclSpec().isFriendSpecified() | ||||||
9771 | ? (D.isFunctionDefinition() | ||||||
9772 | ? TPC_FriendFunctionTemplateDefinition | ||||||
9773 | : TPC_FriendFunctionTemplate) | ||||||
9774 | : (D.getCXXScopeSpec().isSet() && | ||||||
9775 | DC && DC->isRecord() && | ||||||
9776 | DC->isDependentContext()) | ||||||
9777 | ? TPC_ClassTemplateMember | ||||||
9778 | : TPC_FunctionTemplate); | ||||||
9779 | } | ||||||
9780 | |||||||
9781 | if (NewFD->isInvalidDecl()) { | ||||||
9782 | // Ignore all the rest of this. | ||||||
9783 | } else if (!D.isRedeclaration()) { | ||||||
9784 | struct ActOnFDArgs ExtraArgs = { S, D, TemplateParamLists, | ||||||
9785 | AddToScope }; | ||||||
9786 | // Fake up an access specifier if it's supposed to be a class member. | ||||||
9787 | if (isa<CXXRecordDecl>(NewFD->getDeclContext())) | ||||||
9788 | NewFD->setAccess(AS_public); | ||||||
9789 | |||||||
9790 | // Qualified decls generally require a previous declaration. | ||||||
9791 | if (D.getCXXScopeSpec().isSet()) { | ||||||
9792 | // ...with the major exception of templated-scope or | ||||||
9793 | // dependent-scope friend declarations. | ||||||
9794 | |||||||
9795 | // TODO: we currently also suppress this check in dependent | ||||||
9796 | // contexts because (1) the parameter depth will be off when | ||||||
9797 | // matching friend templates and (2) we might actually be | ||||||
9798 | // selecting a friend based on a dependent factor. But there | ||||||
9799 | // are situations where these conditions don't apply and we | ||||||
9800 | // can actually do this check immediately. | ||||||
9801 | // | ||||||
9802 | // Unless the scope is dependent, it's always an error if qualified | ||||||
9803 | // redeclaration lookup found nothing at all. Diagnose that now; | ||||||
9804 | // nothing will diagnose that error later. | ||||||
9805 | if (isFriend && | ||||||
9806 | (D.getCXXScopeSpec().getScopeRep()->isDependent() || | ||||||
9807 | (!Previous.empty() && CurContext->isDependentContext()))) { | ||||||
9808 | // ignore these | ||||||
9809 | } else if (NewFD->isCPUDispatchMultiVersion() || | ||||||
9810 | NewFD->isCPUSpecificMultiVersion()) { | ||||||
9811 | // ignore this, we allow the redeclaration behavior here to create new | ||||||
9812 | // versions of the function. | ||||||
9813 | } else { | ||||||
9814 | // The user tried to provide an out-of-line definition for a | ||||||
9815 | // function that is a member of a class or namespace, but there | ||||||
9816 | // was no such member function declared (C++ [class.mfct]p2, | ||||||
9817 | // C++ [namespace.memdef]p2). For example: | ||||||
9818 | // | ||||||
9819 | // class X { | ||||||
9820 | // void f() const; | ||||||
9821 | // }; | ||||||
9822 | // | ||||||
9823 | // void X::f() { } // ill-formed | ||||||
9824 | // | ||||||
9825 | // Complain about this problem, and attempt to suggest close | ||||||
9826 | // matches (e.g., those that differ only in cv-qualifiers and | ||||||
9827 | // whether the parameter types are references). | ||||||
9828 | |||||||
9829 | if (NamedDecl *Result = DiagnoseInvalidRedeclaration( | ||||||
9830 | *this, Previous, NewFD, ExtraArgs, false, nullptr)) { | ||||||
9831 | AddToScope = ExtraArgs.AddToScope; | ||||||
9832 | return Result; | ||||||
9833 | } | ||||||
9834 | } | ||||||
9835 | |||||||
9836 | // Unqualified local friend declarations are required to resolve | ||||||
9837 | // to something. | ||||||
9838 | } else if (isFriend && cast<CXXRecordDecl>(CurContext)->isLocalClass()) { | ||||||
9839 | if (NamedDecl *Result = DiagnoseInvalidRedeclaration( | ||||||
9840 | *this, Previous, NewFD, ExtraArgs, true, S)) { | ||||||
9841 | AddToScope = ExtraArgs.AddToScope; | ||||||
9842 | return Result; | ||||||
9843 | } | ||||||
9844 | } | ||||||
9845 | } else if (!D.isFunctionDefinition() && | ||||||
9846 | isa<CXXMethodDecl>(NewFD) && NewFD->isOutOfLine() && | ||||||
9847 | !isFriend && !isFunctionTemplateSpecialization && | ||||||
9848 | !isMemberSpecialization) { | ||||||
9849 | // An out-of-line member function declaration must also be a | ||||||
9850 | // definition (C++ [class.mfct]p2). | ||||||
9851 | // Note that this is not the case for explicit specializations of | ||||||
9852 | // function templates or member functions of class templates, per | ||||||
9853 | // C++ [temp.expl.spec]p2. We also allow these declarations as an | ||||||
9854 | // extension for compatibility with old SWIG code which likes to | ||||||
9855 | // generate them. | ||||||
9856 | Diag(NewFD->getLocation(), diag::ext_out_of_line_declaration) | ||||||
9857 | << D.getCXXScopeSpec().getRange(); | ||||||
9858 | } | ||||||
9859 | } | ||||||
9860 | |||||||
9861 | // If this is the first declaration of a library builtin function, add | ||||||
9862 | // attributes as appropriate. | ||||||
9863 | if (!D.isRedeclaration() && | ||||||
9864 | NewFD->getDeclContext()->getRedeclContext()->isFileContext()) { | ||||||
9865 | if (IdentifierInfo *II = Previous.getLookupName().getAsIdentifierInfo()) { | ||||||
9866 | if (unsigned BuiltinID = II->getBuiltinID()) { | ||||||
9867 | if (NewFD->getLanguageLinkage() == CLanguageLinkage) { | ||||||
9868 | // Validate the type matches unless this builtin is specified as | ||||||
9869 | // matching regardless of its declared type. | ||||||
9870 | if (Context.BuiltinInfo.allowTypeMismatch(BuiltinID)) { | ||||||
9871 | NewFD->addAttr(BuiltinAttr::CreateImplicit(Context, BuiltinID)); | ||||||
9872 | } else { | ||||||
9873 | ASTContext::GetBuiltinTypeError Error; | ||||||
9874 | LookupNecessaryTypesForBuiltin(S, BuiltinID); | ||||||
9875 | QualType BuiltinType = Context.GetBuiltinType(BuiltinID, Error); | ||||||
9876 | |||||||
9877 | if (!Error && !BuiltinType.isNull() && | ||||||
9878 | Context.hasSameFunctionTypeIgnoringExceptionSpec( | ||||||
9879 | NewFD->getType(), BuiltinType)) | ||||||
9880 | NewFD->addAttr(BuiltinAttr::CreateImplicit(Context, BuiltinID)); | ||||||
9881 | } | ||||||
9882 | } else if (BuiltinID == Builtin::BI__GetExceptionInfo && | ||||||
9883 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
9884 | // FIXME: We should consider this a builtin only in the std namespace. | ||||||
9885 | NewFD->addAttr(BuiltinAttr::CreateImplicit(Context, BuiltinID)); | ||||||
9886 | } | ||||||
9887 | } | ||||||
9888 | } | ||||||
9889 | } | ||||||
9890 | |||||||
9891 | ProcessPragmaWeak(S, NewFD); | ||||||
9892 | checkAttributesAfterMerging(*this, *NewFD); | ||||||
9893 | |||||||
9894 | AddKnownFunctionAttributes(NewFD); | ||||||
9895 | |||||||
9896 | if (NewFD->hasAttr<OverloadableAttr>() && | ||||||
9897 | !NewFD->getType()->getAs<FunctionProtoType>()) { | ||||||
9898 | Diag(NewFD->getLocation(), | ||||||
9899 | diag::err_attribute_overloadable_no_prototype) | ||||||
9900 | << NewFD; | ||||||
9901 | |||||||
9902 | // Turn this into a variadic function with no parameters. | ||||||
9903 | const FunctionType *FT = NewFD->getType()->getAs<FunctionType>(); | ||||||
9904 | FunctionProtoType::ExtProtoInfo EPI( | ||||||
9905 | Context.getDefaultCallingConvention(true, false)); | ||||||
9906 | EPI.Variadic = true; | ||||||
9907 | EPI.ExtInfo = FT->getExtInfo(); | ||||||
9908 | |||||||
9909 | QualType R = Context.getFunctionType(FT->getReturnType(), None, EPI); | ||||||
9910 | NewFD->setType(R); | ||||||
9911 | } | ||||||
9912 | |||||||
9913 | // If there's a #pragma GCC visibility in scope, and this isn't a class | ||||||
9914 | // member, set the visibility of this function. | ||||||
9915 | if (!DC->isRecord() && NewFD->isExternallyVisible()) | ||||||
9916 | AddPushedVisibilityAttribute(NewFD); | ||||||
9917 | |||||||
9918 | // If there's a #pragma clang arc_cf_code_audited in scope, consider | ||||||
9919 | // marking the function. | ||||||
9920 | AddCFAuditedAttribute(NewFD); | ||||||
9921 | |||||||
9922 | // If this is a function definition, check if we have to apply optnone due to | ||||||
9923 | // a pragma. | ||||||
9924 | if(D.isFunctionDefinition()) | ||||||
9925 | AddRangeBasedOptnone(NewFD); | ||||||
9926 | |||||||
9927 | // If this is the first declaration of an extern C variable, update | ||||||
9928 | // the map of such variables. | ||||||
9929 | if (NewFD->isFirstDecl() && !NewFD->isInvalidDecl() && | ||||||
9930 | isIncompleteDeclExternC(*this, NewFD)) | ||||||
9931 | RegisterLocallyScopedExternCDecl(NewFD, S); | ||||||
9932 | |||||||
9933 | // Set this FunctionDecl's range up to the right paren. | ||||||
9934 | NewFD->setRangeEnd(D.getSourceRange().getEnd()); | ||||||
9935 | |||||||
9936 | if (D.isRedeclaration() && !Previous.empty()) { | ||||||
9937 | NamedDecl *Prev = Previous.getRepresentativeDecl(); | ||||||
9938 | checkDLLAttributeRedeclaration(*this, Prev, NewFD, | ||||||
9939 | isMemberSpecialization || | ||||||
9940 | isFunctionTemplateSpecialization, | ||||||
9941 | D.isFunctionDefinition()); | ||||||
9942 | } | ||||||
9943 | |||||||
9944 | if (getLangOpts().CUDA) { | ||||||
9945 | IdentifierInfo *II = NewFD->getIdentifier(); | ||||||
9946 | if (II && II->isStr(getCudaConfigureFuncName()) && | ||||||
9947 | !NewFD->isInvalidDecl() && | ||||||
9948 | NewFD->getDeclContext()->getRedeclContext()->isTranslationUnit()) { | ||||||
9949 | if (!R->castAs<FunctionType>()->getReturnType()->isScalarType()) | ||||||
9950 | Diag(NewFD->getLocation(), diag::err_config_scalar_return) | ||||||
9951 | << getCudaConfigureFuncName(); | ||||||
9952 | Context.setcudaConfigureCallDecl(NewFD); | ||||||
9953 | } | ||||||
9954 | |||||||
9955 | // Variadic functions, other than a *declaration* of printf, are not allowed | ||||||
9956 | // in device-side CUDA code, unless someone passed | ||||||
9957 | // -fcuda-allow-variadic-functions. | ||||||
9958 | if (!getLangOpts().CUDAAllowVariadicFunctions && NewFD->isVariadic() && | ||||||
9959 | (NewFD->hasAttr<CUDADeviceAttr>() || | ||||||
9960 | NewFD->hasAttr<CUDAGlobalAttr>()) && | ||||||
9961 | !(II && II->isStr("printf") && NewFD->isExternC() && | ||||||
9962 | !D.isFunctionDefinition())) { | ||||||
9963 | Diag(NewFD->getLocation(), diag::err_variadic_device_fn); | ||||||
9964 | } | ||||||
9965 | } | ||||||
9966 | |||||||
9967 | MarkUnusedFileScopedDecl(NewFD); | ||||||
9968 | |||||||
9969 | |||||||
9970 | |||||||
9971 | if (getLangOpts().OpenCL && NewFD->hasAttr<OpenCLKernelAttr>()) { | ||||||
9972 | // OpenCL v1.2 s6.8 static is invalid for kernel functions. | ||||||
9973 | if ((getLangOpts().OpenCLVersion >= 120) | ||||||
9974 | && (SC == SC_Static)) { | ||||||
9975 | Diag(D.getIdentifierLoc(), diag::err_static_kernel); | ||||||
9976 | D.setInvalidType(); | ||||||
9977 | } | ||||||
9978 | |||||||
9979 | // OpenCL v1.2, s6.9 -- Kernels can only have return type void. | ||||||
9980 | if (!NewFD->getReturnType()->isVoidType()) { | ||||||
9981 | SourceRange RTRange = NewFD->getReturnTypeSourceRange(); | ||||||
9982 | Diag(D.getIdentifierLoc(), diag::err_expected_kernel_void_return_type) | ||||||
9983 | << (RTRange.isValid() ? FixItHint::CreateReplacement(RTRange, "void") | ||||||
9984 | : FixItHint()); | ||||||
9985 | D.setInvalidType(); | ||||||
9986 | } | ||||||
9987 | |||||||
9988 | llvm::SmallPtrSet<const Type *, 16> ValidTypes; | ||||||
9989 | for (auto Param : NewFD->parameters()) | ||||||
9990 | checkIsValidOpenCLKernelParameter(*this, D, Param, ValidTypes); | ||||||
9991 | |||||||
9992 | if (getLangOpts().OpenCLCPlusPlus) { | ||||||
9993 | if (DC->isRecord()) { | ||||||
9994 | Diag(D.getIdentifierLoc(), diag::err_method_kernel); | ||||||
9995 | D.setInvalidType(); | ||||||
9996 | } | ||||||
9997 | if (FunctionTemplate) { | ||||||
9998 | Diag(D.getIdentifierLoc(), diag::err_template_kernel); | ||||||
9999 | D.setInvalidType(); | ||||||
10000 | } | ||||||
10001 | } | ||||||
10002 | } | ||||||
10003 | |||||||
10004 | if (getLangOpts().CPlusPlus) { | ||||||
10005 | if (FunctionTemplate) { | ||||||
10006 | if (NewFD->isInvalidDecl()) | ||||||
10007 | FunctionTemplate->setInvalidDecl(); | ||||||
10008 | return FunctionTemplate; | ||||||
10009 | } | ||||||
10010 | |||||||
10011 | if (isMemberSpecialization && !NewFD->isInvalidDecl()) | ||||||
10012 | CompleteMemberSpecialization(NewFD, Previous); | ||||||
10013 | } | ||||||
10014 | |||||||
10015 | for (const ParmVarDecl *Param : NewFD->parameters()) { | ||||||
10016 | QualType PT = Param->getType(); | ||||||
10017 | |||||||
10018 | // OpenCL 2.0 pipe restrictions forbids pipe packet types to be non-value | ||||||
10019 | // types. | ||||||
10020 | if (getLangOpts().OpenCLVersion >= 200 || getLangOpts().OpenCLCPlusPlus) { | ||||||
10021 | if(const PipeType *PipeTy = PT->getAs<PipeType>()) { | ||||||
10022 | QualType ElemTy = PipeTy->getElementType(); | ||||||
10023 | if (ElemTy->isReferenceType() || ElemTy->isPointerType()) { | ||||||
10024 | Diag(Param->getTypeSpecStartLoc(), diag::err_reference_pipe_type ); | ||||||
10025 | D.setInvalidType(); | ||||||
10026 | } | ||||||
10027 | } | ||||||
10028 | } | ||||||
10029 | } | ||||||
10030 | |||||||
10031 | // Here we have an function template explicit specialization at class scope. | ||||||
10032 | // The actual specialization will be postponed to template instatiation | ||||||
10033 | // time via the ClassScopeFunctionSpecializationDecl node. | ||||||
10034 | if (isDependentClassScopeExplicitSpecialization) { | ||||||
10035 | ClassScopeFunctionSpecializationDecl *NewSpec = | ||||||
10036 | ClassScopeFunctionSpecializationDecl::Create( | ||||||
10037 | Context, CurContext, NewFD->getLocation(), | ||||||
10038 | cast<CXXMethodDecl>(NewFD), | ||||||
10039 | HasExplicitTemplateArgs, TemplateArgs); | ||||||
10040 | CurContext->addDecl(NewSpec); | ||||||
10041 | AddToScope = false; | ||||||
10042 | } | ||||||
10043 | |||||||
10044 | // Diagnose availability attributes. Availability cannot be used on functions | ||||||
10045 | // that are run during load/unload. | ||||||
10046 | if (const auto *attr = NewFD->getAttr<AvailabilityAttr>()) { | ||||||
10047 | if (NewFD->hasAttr<ConstructorAttr>()) { | ||||||
10048 | Diag(attr->getLocation(), diag::warn_availability_on_static_initializer) | ||||||
10049 | << 1; | ||||||
10050 | NewFD->dropAttr<AvailabilityAttr>(); | ||||||
10051 | } | ||||||
10052 | if (NewFD->hasAttr<DestructorAttr>()) { | ||||||
10053 | Diag(attr->getLocation(), diag::warn_availability_on_static_initializer) | ||||||
10054 | << 2; | ||||||
10055 | NewFD->dropAttr<AvailabilityAttr>(); | ||||||
10056 | } | ||||||
10057 | } | ||||||
10058 | |||||||
10059 | // Diagnose no_builtin attribute on function declaration that are not a | ||||||
10060 | // definition. | ||||||
10061 | // FIXME: We should really be doing this in | ||||||
10062 | // SemaDeclAttr.cpp::handleNoBuiltinAttr, unfortunately we only have access to | ||||||
10063 | // the FunctionDecl and at this point of the code | ||||||
10064 | // FunctionDecl::isThisDeclarationADefinition() which always returns `false` | ||||||
10065 | // because Sema::ActOnStartOfFunctionDef has not been called yet. | ||||||
10066 | if (const auto *NBA = NewFD->getAttr<NoBuiltinAttr>()) | ||||||
10067 | switch (D.getFunctionDefinitionKind()) { | ||||||
10068 | case FunctionDefinitionKind::Defaulted: | ||||||
10069 | case FunctionDefinitionKind::Deleted: | ||||||
10070 | Diag(NBA->getLocation(), | ||||||
10071 | diag::err_attribute_no_builtin_on_defaulted_deleted_function) | ||||||
10072 | << NBA->getSpelling(); | ||||||
10073 | break; | ||||||
10074 | case FunctionDefinitionKind::Declaration: | ||||||
10075 | Diag(NBA->getLocation(), diag::err_attribute_no_builtin_on_non_definition) | ||||||
10076 | << NBA->getSpelling(); | ||||||
10077 | break; | ||||||
10078 | case FunctionDefinitionKind::Definition: | ||||||
10079 | break; | ||||||
10080 | } | ||||||
10081 | |||||||
10082 | return NewFD; | ||||||
10083 | } | ||||||
10084 | |||||||
10085 | /// Return a CodeSegAttr from a containing class. The Microsoft docs say | ||||||
10086 | /// when __declspec(code_seg) "is applied to a class, all member functions of | ||||||
10087 | /// the class and nested classes -- this includes compiler-generated special | ||||||
10088 | /// member functions -- are put in the specified segment." | ||||||
10089 | /// The actual behavior is a little more complicated. The Microsoft compiler | ||||||
10090 | /// won't check outer classes if there is an active value from #pragma code_seg. | ||||||
10091 | /// The CodeSeg is always applied from the direct parent but only from outer | ||||||
10092 | /// classes when the #pragma code_seg stack is empty. See: | ||||||
10093 | /// https://reviews.llvm.org/D22931, the Microsoft feedback page is no longer | ||||||
10094 | /// available since MS has removed the page. | ||||||
10095 | static Attr *getImplicitCodeSegAttrFromClass(Sema &S, const FunctionDecl *FD) { | ||||||
10096 | const auto *Method = dyn_cast<CXXMethodDecl>(FD); | ||||||
10097 | if (!Method) | ||||||
10098 | return nullptr; | ||||||
10099 | const CXXRecordDecl *Parent = Method->getParent(); | ||||||
10100 | if (const auto *SAttr = Parent->getAttr<CodeSegAttr>()) { | ||||||
10101 | Attr *NewAttr = SAttr->clone(S.getASTContext()); | ||||||
10102 | NewAttr->setImplicit(true); | ||||||
10103 | return NewAttr; | ||||||
10104 | } | ||||||
10105 | |||||||
10106 | // The Microsoft compiler won't check outer classes for the CodeSeg | ||||||
10107 | // when the #pragma code_seg stack is active. | ||||||
10108 | if (S.CodeSegStack.CurrentValue) | ||||||
10109 | return nullptr; | ||||||
10110 | |||||||
10111 | while ((Parent = dyn_cast<CXXRecordDecl>(Parent->getParent()))) { | ||||||
10112 | if (const auto *SAttr = Parent->getAttr<CodeSegAttr>()) { | ||||||
10113 | Attr *NewAttr = SAttr->clone(S.getASTContext()); | ||||||
10114 | NewAttr->setImplicit(true); | ||||||
10115 | return NewAttr; | ||||||
10116 | } | ||||||
10117 | } | ||||||
10118 | return nullptr; | ||||||
10119 | } | ||||||
10120 | |||||||
10121 | /// Returns an implicit CodeSegAttr if a __declspec(code_seg) is found on a | ||||||
10122 | /// containing class. Otherwise it will return implicit SectionAttr if the | ||||||
10123 | /// function is a definition and there is an active value on CodeSegStack | ||||||
10124 | /// (from the current #pragma code-seg value). | ||||||
10125 | /// | ||||||
10126 | /// \param FD Function being declared. | ||||||
10127 | /// \param IsDefinition Whether it is a definition or just a declarartion. | ||||||
10128 | /// \returns A CodeSegAttr or SectionAttr to apply to the function or | ||||||
10129 | /// nullptr if no attribute should be added. | ||||||
10130 | Attr *Sema::getImplicitCodeSegOrSectionAttrForFunction(const FunctionDecl *FD, | ||||||
10131 | bool IsDefinition) { | ||||||
10132 | if (Attr *A = getImplicitCodeSegAttrFromClass(*this, FD)) | ||||||
10133 | return A; | ||||||
10134 | if (!FD->hasAttr<SectionAttr>() && IsDefinition && | ||||||
10135 | CodeSegStack.CurrentValue) | ||||||
10136 | return SectionAttr::CreateImplicit( | ||||||
10137 | getASTContext(), CodeSegStack.CurrentValue->getString(), | ||||||
10138 | CodeSegStack.CurrentPragmaLocation, AttributeCommonInfo::AS_Pragma, | ||||||
10139 | SectionAttr::Declspec_allocate); | ||||||
10140 | return nullptr; | ||||||
10141 | } | ||||||
10142 | |||||||
10143 | /// Determines if we can perform a correct type check for \p D as a | ||||||
10144 | /// redeclaration of \p PrevDecl. If not, we can generally still perform a | ||||||
10145 | /// best-effort check. | ||||||
10146 | /// | ||||||
10147 | /// \param NewD The new declaration. | ||||||
10148 | /// \param OldD The old declaration. | ||||||
10149 | /// \param NewT The portion of the type of the new declaration to check. | ||||||
10150 | /// \param OldT The portion of the type of the old declaration to check. | ||||||
10151 | bool Sema::canFullyTypeCheckRedeclaration(ValueDecl *NewD, ValueDecl *OldD, | ||||||
10152 | QualType NewT, QualType OldT) { | ||||||
10153 | if (!NewD->getLexicalDeclContext()->isDependentContext()) | ||||||
10154 | return true; | ||||||
10155 | |||||||
10156 | // For dependently-typed local extern declarations and friends, we can't | ||||||
10157 | // perform a correct type check in general until instantiation: | ||||||
10158 | // | ||||||
10159 | // int f(); | ||||||
10160 | // template<typename T> void g() { T f(); } | ||||||
10161 | // | ||||||
10162 | // (valid if g() is only instantiated with T = int). | ||||||
10163 | if (NewT->isDependentType() && | ||||||
10164 | (NewD->isLocalExternDecl() || NewD->getFriendObjectKind())) | ||||||
10165 | return false; | ||||||
10166 | |||||||
10167 | // Similarly, if the previous declaration was a dependent local extern | ||||||
10168 | // declaration, we don't really know its type yet. | ||||||
10169 | if (OldT->isDependentType() && OldD->isLocalExternDecl()) | ||||||
10170 | return false; | ||||||
10171 | |||||||
10172 | return true; | ||||||
10173 | } | ||||||
10174 | |||||||
10175 | /// Checks if the new declaration declared in dependent context must be | ||||||
10176 | /// put in the same redeclaration chain as the specified declaration. | ||||||
10177 | /// | ||||||
10178 | /// \param D Declaration that is checked. | ||||||
10179 | /// \param PrevDecl Previous declaration found with proper lookup method for the | ||||||
10180 | /// same declaration name. | ||||||
10181 | /// \returns True if D must be added to the redeclaration chain which PrevDecl | ||||||
10182 | /// belongs to. | ||||||
10183 | /// | ||||||
10184 | bool Sema::shouldLinkDependentDeclWithPrevious(Decl *D, Decl *PrevDecl) { | ||||||
10185 | if (!D->getLexicalDeclContext()->isDependentContext()) | ||||||
10186 | return true; | ||||||
10187 | |||||||
10188 | // Don't chain dependent friend function definitions until instantiation, to | ||||||
10189 | // permit cases like | ||||||
10190 | // | ||||||
10191 | // void func(); | ||||||
10192 | // template<typename T> class C1 { friend void func() {} }; | ||||||
10193 | // template<typename T> class C2 { friend void func() {} }; | ||||||
10194 | // | ||||||
10195 | // ... which is valid if only one of C1 and C2 is ever instantiated. | ||||||
10196 | // | ||||||
10197 | // FIXME: This need only apply to function definitions. For now, we proxy | ||||||
10198 | // this by checking for a file-scope function. We do not want this to apply | ||||||
10199 | // to friend declarations nominating member functions, because that gets in | ||||||
10200 | // the way of access checks. | ||||||
10201 | if (D->getFriendObjectKind() && D->getDeclContext()->isFileContext()) | ||||||
10202 | return false; | ||||||
10203 | |||||||
10204 | auto *VD = dyn_cast<ValueDecl>(D); | ||||||
10205 | auto *PrevVD = dyn_cast<ValueDecl>(PrevDecl); | ||||||
10206 | return !VD || !PrevVD || | ||||||
10207 | canFullyTypeCheckRedeclaration(VD, PrevVD, VD->getType(), | ||||||
10208 | PrevVD->getType()); | ||||||
10209 | } | ||||||
10210 | |||||||
10211 | /// Check the target attribute of the function for MultiVersion | ||||||
10212 | /// validity. | ||||||
10213 | /// | ||||||
10214 | /// Returns true if there was an error, false otherwise. | ||||||
10215 | static bool CheckMultiVersionValue(Sema &S, const FunctionDecl *FD) { | ||||||
10216 | const auto *TA = FD->getAttr<TargetAttr>(); | ||||||
10217 | assert(TA && "MultiVersion Candidate requires a target attribute")(static_cast <bool> (TA && "MultiVersion Candidate requires a target attribute" ) ? void (0) : __assert_fail ("TA && \"MultiVersion Candidate requires a target attribute\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10217, __extension__ __PRETTY_FUNCTION__)); | ||||||
10218 | ParsedTargetAttr ParseInfo = TA->parse(); | ||||||
10219 | const TargetInfo &TargetInfo = S.Context.getTargetInfo(); | ||||||
10220 | enum ErrType { Feature = 0, Architecture = 1 }; | ||||||
10221 | |||||||
10222 | if (!ParseInfo.Architecture.empty() && | ||||||
10223 | !TargetInfo.validateCpuIs(ParseInfo.Architecture)) { | ||||||
10224 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
10225 | << Architecture << ParseInfo.Architecture; | ||||||
10226 | return true; | ||||||
10227 | } | ||||||
10228 | |||||||
10229 | for (const auto &Feat : ParseInfo.Features) { | ||||||
10230 | auto BareFeat = StringRef{Feat}.substr(1); | ||||||
10231 | if (Feat[0] == '-') { | ||||||
10232 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
10233 | << Feature << ("no-" + BareFeat).str(); | ||||||
10234 | return true; | ||||||
10235 | } | ||||||
10236 | |||||||
10237 | if (!TargetInfo.validateCpuSupports(BareFeat) || | ||||||
10238 | !TargetInfo.isValidFeatureName(BareFeat)) { | ||||||
10239 | S.Diag(FD->getLocation(), diag::err_bad_multiversion_option) | ||||||
10240 | << Feature << BareFeat; | ||||||
10241 | return true; | ||||||
10242 | } | ||||||
10243 | } | ||||||
10244 | return false; | ||||||
10245 | } | ||||||
10246 | |||||||
10247 | // Provide a white-list of attributes that are allowed to be combined with | ||||||
10248 | // multiversion functions. | ||||||
10249 | static bool AttrCompatibleWithMultiVersion(attr::Kind Kind, | ||||||
10250 | MultiVersionKind MVType) { | ||||||
10251 | // Note: this list/diagnosis must match the list in | ||||||
10252 | // checkMultiversionAttributesAllSame. | ||||||
10253 | switch (Kind) { | ||||||
10254 | default: | ||||||
10255 | return false; | ||||||
10256 | case attr::Used: | ||||||
10257 | return MVType == MultiVersionKind::Target; | ||||||
10258 | case attr::NonNull: | ||||||
10259 | case attr::NoThrow: | ||||||
10260 | return true; | ||||||
10261 | } | ||||||
10262 | } | ||||||
10263 | |||||||
10264 | static bool checkNonMultiVersionCompatAttributes(Sema &S, | ||||||
10265 | const FunctionDecl *FD, | ||||||
10266 | const FunctionDecl *CausedFD, | ||||||
10267 | MultiVersionKind MVType) { | ||||||
10268 | bool IsCPUSpecificCPUDispatchMVType = | ||||||
10269 | MVType == MultiVersionKind::CPUDispatch || | ||||||
10270 | MVType == MultiVersionKind::CPUSpecific; | ||||||
10271 | const auto Diagnose = [FD, CausedFD, IsCPUSpecificCPUDispatchMVType]( | ||||||
10272 | Sema &S, const Attr *A) { | ||||||
10273 | S.Diag(FD->getLocation(), diag::err_multiversion_disallowed_other_attr) | ||||||
10274 | << IsCPUSpecificCPUDispatchMVType << A; | ||||||
10275 | if (CausedFD) | ||||||
10276 | S.Diag(CausedFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10277 | return true; | ||||||
10278 | }; | ||||||
10279 | |||||||
10280 | for (const Attr *A : FD->attrs()) { | ||||||
10281 | switch (A->getKind()) { | ||||||
10282 | case attr::CPUDispatch: | ||||||
10283 | case attr::CPUSpecific: | ||||||
10284 | if (MVType != MultiVersionKind::CPUDispatch && | ||||||
10285 | MVType != MultiVersionKind::CPUSpecific) | ||||||
10286 | return Diagnose(S, A); | ||||||
10287 | break; | ||||||
10288 | case attr::Target: | ||||||
10289 | if (MVType != MultiVersionKind::Target) | ||||||
10290 | return Diagnose(S, A); | ||||||
10291 | break; | ||||||
10292 | default: | ||||||
10293 | if (!AttrCompatibleWithMultiVersion(A->getKind(), MVType)) | ||||||
10294 | return Diagnose(S, A); | ||||||
10295 | break; | ||||||
10296 | } | ||||||
10297 | } | ||||||
10298 | return false; | ||||||
10299 | } | ||||||
10300 | |||||||
10301 | bool Sema::areMultiversionVariantFunctionsCompatible( | ||||||
10302 | const FunctionDecl *OldFD, const FunctionDecl *NewFD, | ||||||
10303 | const PartialDiagnostic &NoProtoDiagID, | ||||||
10304 | const PartialDiagnosticAt &NoteCausedDiagIDAt, | ||||||
10305 | const PartialDiagnosticAt &NoSupportDiagIDAt, | ||||||
10306 | const PartialDiagnosticAt &DiffDiagIDAt, bool TemplatesSupported, | ||||||
10307 | bool ConstexprSupported, bool CLinkageMayDiffer) { | ||||||
10308 | enum DoesntSupport { | ||||||
10309 | FuncTemplates = 0, | ||||||
10310 | VirtFuncs = 1, | ||||||
10311 | DeducedReturn = 2, | ||||||
10312 | Constructors = 3, | ||||||
10313 | Destructors = 4, | ||||||
10314 | DeletedFuncs = 5, | ||||||
10315 | DefaultedFuncs = 6, | ||||||
10316 | ConstexprFuncs = 7, | ||||||
10317 | ConstevalFuncs = 8, | ||||||
10318 | }; | ||||||
10319 | enum Different { | ||||||
10320 | CallingConv = 0, | ||||||
10321 | ReturnType = 1, | ||||||
10322 | ConstexprSpec = 2, | ||||||
10323 | InlineSpec = 3, | ||||||
10324 | StorageClass = 4, | ||||||
10325 | Linkage = 5, | ||||||
10326 | }; | ||||||
10327 | |||||||
10328 | if (NoProtoDiagID.getDiagID() != 0 && OldFD && | ||||||
10329 | !OldFD->getType()->getAs<FunctionProtoType>()) { | ||||||
10330 | Diag(OldFD->getLocation(), NoProtoDiagID); | ||||||
10331 | Diag(NoteCausedDiagIDAt.first, NoteCausedDiagIDAt.second); | ||||||
10332 | return true; | ||||||
10333 | } | ||||||
10334 | |||||||
10335 | if (NoProtoDiagID.getDiagID() != 0 && | ||||||
10336 | !NewFD->getType()->getAs<FunctionProtoType>()) | ||||||
10337 | return Diag(NewFD->getLocation(), NoProtoDiagID); | ||||||
10338 | |||||||
10339 | if (!TemplatesSupported && | ||||||
10340 | NewFD->getTemplatedKind() == FunctionDecl::TK_FunctionTemplate) | ||||||
10341 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10342 | << FuncTemplates; | ||||||
10343 | |||||||
10344 | if (const auto *NewCXXFD = dyn_cast<CXXMethodDecl>(NewFD)) { | ||||||
10345 | if (NewCXXFD->isVirtual()) | ||||||
10346 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10347 | << VirtFuncs; | ||||||
10348 | |||||||
10349 | if (isa<CXXConstructorDecl>(NewCXXFD)) | ||||||
10350 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10351 | << Constructors; | ||||||
10352 | |||||||
10353 | if (isa<CXXDestructorDecl>(NewCXXFD)) | ||||||
10354 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10355 | << Destructors; | ||||||
10356 | } | ||||||
10357 | |||||||
10358 | if (NewFD->isDeleted()) | ||||||
10359 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10360 | << DeletedFuncs; | ||||||
10361 | |||||||
10362 | if (NewFD->isDefaulted()) | ||||||
10363 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10364 | << DefaultedFuncs; | ||||||
10365 | |||||||
10366 | if (!ConstexprSupported && NewFD->isConstexpr()) | ||||||
10367 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10368 | << (NewFD->isConsteval() ? ConstevalFuncs : ConstexprFuncs); | ||||||
10369 | |||||||
10370 | QualType NewQType = Context.getCanonicalType(NewFD->getType()); | ||||||
10371 | const auto *NewType = cast<FunctionType>(NewQType); | ||||||
10372 | QualType NewReturnType = NewType->getReturnType(); | ||||||
10373 | |||||||
10374 | if (NewReturnType->isUndeducedType()) | ||||||
10375 | return Diag(NoSupportDiagIDAt.first, NoSupportDiagIDAt.second) | ||||||
10376 | << DeducedReturn; | ||||||
10377 | |||||||
10378 | // Ensure the return type is identical. | ||||||
10379 | if (OldFD) { | ||||||
10380 | QualType OldQType = Context.getCanonicalType(OldFD->getType()); | ||||||
10381 | const auto *OldType = cast<FunctionType>(OldQType); | ||||||
10382 | FunctionType::ExtInfo OldTypeInfo = OldType->getExtInfo(); | ||||||
10383 | FunctionType::ExtInfo NewTypeInfo = NewType->getExtInfo(); | ||||||
10384 | |||||||
10385 | if (OldTypeInfo.getCC() != NewTypeInfo.getCC()) | ||||||
10386 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << CallingConv; | ||||||
10387 | |||||||
10388 | QualType OldReturnType = OldType->getReturnType(); | ||||||
10389 | |||||||
10390 | if (OldReturnType != NewReturnType) | ||||||
10391 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << ReturnType; | ||||||
10392 | |||||||
10393 | if (OldFD->getConstexprKind() != NewFD->getConstexprKind()) | ||||||
10394 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << ConstexprSpec; | ||||||
10395 | |||||||
10396 | if (OldFD->isInlineSpecified() != NewFD->isInlineSpecified()) | ||||||
10397 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << InlineSpec; | ||||||
10398 | |||||||
10399 | if (OldFD->getStorageClass() != NewFD->getStorageClass()) | ||||||
10400 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << StorageClass; | ||||||
10401 | |||||||
10402 | if (!CLinkageMayDiffer && OldFD->isExternC() != NewFD->isExternC()) | ||||||
10403 | return Diag(DiffDiagIDAt.first, DiffDiagIDAt.second) << Linkage; | ||||||
10404 | |||||||
10405 | if (CheckEquivalentExceptionSpec( | ||||||
10406 | OldFD->getType()->getAs<FunctionProtoType>(), OldFD->getLocation(), | ||||||
10407 | NewFD->getType()->getAs<FunctionProtoType>(), NewFD->getLocation())) | ||||||
10408 | return true; | ||||||
10409 | } | ||||||
10410 | return false; | ||||||
10411 | } | ||||||
10412 | |||||||
10413 | static bool CheckMultiVersionAdditionalRules(Sema &S, const FunctionDecl *OldFD, | ||||||
10414 | const FunctionDecl *NewFD, | ||||||
10415 | bool CausesMV, | ||||||
10416 | MultiVersionKind MVType) { | ||||||
10417 | if (!S.getASTContext().getTargetInfo().supportsMultiVersioning()) { | ||||||
10418 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_supported); | ||||||
10419 | if (OldFD) | ||||||
10420 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10421 | return true; | ||||||
10422 | } | ||||||
10423 | |||||||
10424 | bool IsCPUSpecificCPUDispatchMVType = | ||||||
10425 | MVType == MultiVersionKind::CPUDispatch || | ||||||
10426 | MVType == MultiVersionKind::CPUSpecific; | ||||||
10427 | |||||||
10428 | if (CausesMV && OldFD && | ||||||
10429 | checkNonMultiVersionCompatAttributes(S, OldFD, NewFD, MVType)) | ||||||
10430 | return true; | ||||||
10431 | |||||||
10432 | if (checkNonMultiVersionCompatAttributes(S, NewFD, nullptr, MVType)) | ||||||
10433 | return true; | ||||||
10434 | |||||||
10435 | // Only allow transition to MultiVersion if it hasn't been used. | ||||||
10436 | if (OldFD && CausesMV && OldFD->isUsed(false)) | ||||||
10437 | return S.Diag(NewFD->getLocation(), diag::err_multiversion_after_used); | ||||||
10438 | |||||||
10439 | return S.areMultiversionVariantFunctionsCompatible( | ||||||
10440 | OldFD, NewFD, S.PDiag(diag::err_multiversion_noproto), | ||||||
10441 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10442 | S.PDiag(diag::note_multiversioning_caused_here)), | ||||||
10443 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10444 | S.PDiag(diag::err_multiversion_doesnt_support) | ||||||
10445 | << IsCPUSpecificCPUDispatchMVType), | ||||||
10446 | PartialDiagnosticAt(NewFD->getLocation(), | ||||||
10447 | S.PDiag(diag::err_multiversion_diff)), | ||||||
10448 | /*TemplatesSupported=*/false, | ||||||
10449 | /*ConstexprSupported=*/!IsCPUSpecificCPUDispatchMVType, | ||||||
10450 | /*CLinkageMayDiffer=*/false); | ||||||
10451 | } | ||||||
10452 | |||||||
10453 | /// Check the validity of a multiversion function declaration that is the | ||||||
10454 | /// first of its kind. Also sets the multiversion'ness' of the function itself. | ||||||
10455 | /// | ||||||
10456 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10457 | /// | ||||||
10458 | /// Returns true if there was an error, false otherwise. | ||||||
10459 | static bool CheckMultiVersionFirstFunction(Sema &S, FunctionDecl *FD, | ||||||
10460 | MultiVersionKind MVType, | ||||||
10461 | const TargetAttr *TA) { | ||||||
10462 | assert(MVType != MultiVersionKind::None &&(static_cast <bool> (MVType != MultiVersionKind::None && "Function lacks multiversion attribute") ? void (0) : __assert_fail ("MVType != MultiVersionKind::None && \"Function lacks multiversion attribute\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10463, __extension__ __PRETTY_FUNCTION__)) | ||||||
10463 | "Function lacks multiversion attribute")(static_cast <bool> (MVType != MultiVersionKind::None && "Function lacks multiversion attribute") ? void (0) : __assert_fail ("MVType != MultiVersionKind::None && \"Function lacks multiversion attribute\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10463, __extension__ __PRETTY_FUNCTION__)); | ||||||
10464 | |||||||
10465 | // Target only causes MV if it is default, otherwise this is a normal | ||||||
10466 | // function. | ||||||
10467 | if (MVType == MultiVersionKind::Target && !TA->isDefaultVersion()) | ||||||
10468 | return false; | ||||||
10469 | |||||||
10470 | if (MVType == MultiVersionKind::Target && CheckMultiVersionValue(S, FD)) { | ||||||
10471 | FD->setInvalidDecl(); | ||||||
10472 | return true; | ||||||
10473 | } | ||||||
10474 | |||||||
10475 | if (CheckMultiVersionAdditionalRules(S, nullptr, FD, true, MVType)) { | ||||||
10476 | FD->setInvalidDecl(); | ||||||
10477 | return true; | ||||||
10478 | } | ||||||
10479 | |||||||
10480 | FD->setIsMultiVersion(); | ||||||
10481 | return false; | ||||||
10482 | } | ||||||
10483 | |||||||
10484 | static bool PreviousDeclsHaveMultiVersionAttribute(const FunctionDecl *FD) { | ||||||
10485 | for (const Decl *D = FD->getPreviousDecl(); D; D = D->getPreviousDecl()) { | ||||||
10486 | if (D->getAsFunction()->getMultiVersionKind() != MultiVersionKind::None) | ||||||
10487 | return true; | ||||||
10488 | } | ||||||
10489 | |||||||
10490 | return false; | ||||||
10491 | } | ||||||
10492 | |||||||
10493 | static bool CheckTargetCausesMultiVersioning( | ||||||
10494 | Sema &S, FunctionDecl *OldFD, FunctionDecl *NewFD, const TargetAttr *NewTA, | ||||||
10495 | bool &Redeclaration, NamedDecl *&OldDecl, bool &MergeTypeWithPrevious, | ||||||
10496 | LookupResult &Previous) { | ||||||
10497 | const auto *OldTA = OldFD->getAttr<TargetAttr>(); | ||||||
10498 | ParsedTargetAttr NewParsed = NewTA->parse(); | ||||||
10499 | // Sort order doesn't matter, it just needs to be consistent. | ||||||
10500 | llvm::sort(NewParsed.Features); | ||||||
10501 | |||||||
10502 | // If the old decl is NOT MultiVersioned yet, and we don't cause that | ||||||
10503 | // to change, this is a simple redeclaration. | ||||||
10504 | if (!NewTA->isDefaultVersion() && | ||||||
10505 | (!OldTA || OldTA->getFeaturesStr() == NewTA->getFeaturesStr())) | ||||||
10506 | return false; | ||||||
10507 | |||||||
10508 | // Otherwise, this decl causes MultiVersioning. | ||||||
10509 | if (!S.getASTContext().getTargetInfo().supportsMultiVersioning()) { | ||||||
10510 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_supported); | ||||||
10511 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10512 | NewFD->setInvalidDecl(); | ||||||
10513 | return true; | ||||||
10514 | } | ||||||
10515 | |||||||
10516 | if (CheckMultiVersionAdditionalRules(S, OldFD, NewFD, true, | ||||||
10517 | MultiVersionKind::Target)) { | ||||||
10518 | NewFD->setInvalidDecl(); | ||||||
10519 | return true; | ||||||
10520 | } | ||||||
10521 | |||||||
10522 | if (CheckMultiVersionValue(S, NewFD)) { | ||||||
10523 | NewFD->setInvalidDecl(); | ||||||
10524 | return true; | ||||||
10525 | } | ||||||
10526 | |||||||
10527 | // If this is 'default', permit the forward declaration. | ||||||
10528 | if (!OldFD->isMultiVersion() && !OldTA && NewTA->isDefaultVersion()) { | ||||||
10529 | Redeclaration = true; | ||||||
10530 | OldDecl = OldFD; | ||||||
10531 | OldFD->setIsMultiVersion(); | ||||||
10532 | NewFD->setIsMultiVersion(); | ||||||
10533 | return false; | ||||||
10534 | } | ||||||
10535 | |||||||
10536 | if (CheckMultiVersionValue(S, OldFD)) { | ||||||
10537 | S.Diag(NewFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10538 | NewFD->setInvalidDecl(); | ||||||
10539 | return true; | ||||||
10540 | } | ||||||
10541 | |||||||
10542 | ParsedTargetAttr OldParsed = OldTA->parse(std::less<std::string>()); | ||||||
10543 | |||||||
10544 | if (OldParsed == NewParsed) { | ||||||
10545 | S.Diag(NewFD->getLocation(), diag::err_multiversion_duplicate); | ||||||
10546 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10547 | NewFD->setInvalidDecl(); | ||||||
10548 | return true; | ||||||
10549 | } | ||||||
10550 | |||||||
10551 | for (const auto *FD : OldFD->redecls()) { | ||||||
10552 | const auto *CurTA = FD->getAttr<TargetAttr>(); | ||||||
10553 | // We allow forward declarations before ANY multiversioning attributes, but | ||||||
10554 | // nothing after the fact. | ||||||
10555 | if (PreviousDeclsHaveMultiVersionAttribute(FD) && | ||||||
10556 | (!CurTA || CurTA->isInherited())) { | ||||||
10557 | S.Diag(FD->getLocation(), diag::err_multiversion_required_in_redecl) | ||||||
10558 | << 0; | ||||||
10559 | S.Diag(NewFD->getLocation(), diag::note_multiversioning_caused_here); | ||||||
10560 | NewFD->setInvalidDecl(); | ||||||
10561 | return true; | ||||||
10562 | } | ||||||
10563 | } | ||||||
10564 | |||||||
10565 | OldFD->setIsMultiVersion(); | ||||||
10566 | NewFD->setIsMultiVersion(); | ||||||
10567 | Redeclaration = false; | ||||||
10568 | MergeTypeWithPrevious = false; | ||||||
10569 | OldDecl = nullptr; | ||||||
10570 | Previous.clear(); | ||||||
10571 | return false; | ||||||
10572 | } | ||||||
10573 | |||||||
10574 | /// Check the validity of a new function declaration being added to an existing | ||||||
10575 | /// multiversioned declaration collection. | ||||||
10576 | static bool CheckMultiVersionAdditionalDecl( | ||||||
10577 | Sema &S, FunctionDecl *OldFD, FunctionDecl *NewFD, | ||||||
10578 | MultiVersionKind NewMVType, const TargetAttr *NewTA, | ||||||
10579 | const CPUDispatchAttr *NewCPUDisp, const CPUSpecificAttr *NewCPUSpec, | ||||||
10580 | bool &Redeclaration, NamedDecl *&OldDecl, bool &MergeTypeWithPrevious, | ||||||
10581 | LookupResult &Previous) { | ||||||
10582 | |||||||
10583 | MultiVersionKind OldMVType = OldFD->getMultiVersionKind(); | ||||||
10584 | // Disallow mixing of multiversioning types. | ||||||
10585 | if ((OldMVType == MultiVersionKind::Target && | ||||||
10586 | NewMVType != MultiVersionKind::Target) || | ||||||
10587 | (NewMVType == MultiVersionKind::Target && | ||||||
10588 | OldMVType != MultiVersionKind::Target)) { | ||||||
10589 | S.Diag(NewFD->getLocation(), diag::err_multiversion_types_mixed); | ||||||
10590 | S.Diag(OldFD->getLocation(), diag::note_previous_declaration); | ||||||
10591 | NewFD->setInvalidDecl(); | ||||||
10592 | return true; | ||||||
10593 | } | ||||||
10594 | |||||||
10595 | ParsedTargetAttr NewParsed; | ||||||
10596 | if (NewTA) { | ||||||
10597 | NewParsed = NewTA->parse(); | ||||||
10598 | llvm::sort(NewParsed.Features); | ||||||
10599 | } | ||||||
10600 | |||||||
10601 | bool UseMemberUsingDeclRules = | ||||||
10602 | S.CurContext->isRecord() && !NewFD->getFriendObjectKind(); | ||||||
10603 | |||||||
10604 | // Next, check ALL non-overloads to see if this is a redeclaration of a | ||||||
10605 | // previous member of the MultiVersion set. | ||||||
10606 | for (NamedDecl *ND : Previous) { | ||||||
10607 | FunctionDecl *CurFD = ND->getAsFunction(); | ||||||
10608 | if (!CurFD) | ||||||
10609 | continue; | ||||||
10610 | if (S.IsOverload(NewFD, CurFD, UseMemberUsingDeclRules)) | ||||||
10611 | continue; | ||||||
10612 | |||||||
10613 | if (NewMVType == MultiVersionKind::Target) { | ||||||
10614 | const auto *CurTA = CurFD->getAttr<TargetAttr>(); | ||||||
10615 | if (CurTA->getFeaturesStr() == NewTA->getFeaturesStr()) { | ||||||
10616 | NewFD->setIsMultiVersion(); | ||||||
10617 | Redeclaration = true; | ||||||
10618 | OldDecl = ND; | ||||||
10619 | return false; | ||||||
10620 | } | ||||||
10621 | |||||||
10622 | ParsedTargetAttr CurParsed = CurTA->parse(std::less<std::string>()); | ||||||
10623 | if (CurParsed == NewParsed) { | ||||||
10624 | S.Diag(NewFD->getLocation(), diag::err_multiversion_duplicate); | ||||||
10625 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10626 | NewFD->setInvalidDecl(); | ||||||
10627 | return true; | ||||||
10628 | } | ||||||
10629 | } else { | ||||||
10630 | const auto *CurCPUSpec = CurFD->getAttr<CPUSpecificAttr>(); | ||||||
10631 | const auto *CurCPUDisp = CurFD->getAttr<CPUDispatchAttr>(); | ||||||
10632 | // Handle CPUDispatch/CPUSpecific versions. | ||||||
10633 | // Only 1 CPUDispatch function is allowed, this will make it go through | ||||||
10634 | // the redeclaration errors. | ||||||
10635 | if (NewMVType == MultiVersionKind::CPUDispatch && | ||||||
10636 | CurFD->hasAttr<CPUDispatchAttr>()) { | ||||||
10637 | if (CurCPUDisp->cpus_size() == NewCPUDisp->cpus_size() && | ||||||
10638 | std::equal( | ||||||
10639 | CurCPUDisp->cpus_begin(), CurCPUDisp->cpus_end(), | ||||||
10640 | NewCPUDisp->cpus_begin(), | ||||||
10641 | [](const IdentifierInfo *Cur, const IdentifierInfo *New) { | ||||||
10642 | return Cur->getName() == New->getName(); | ||||||
10643 | })) { | ||||||
10644 | NewFD->setIsMultiVersion(); | ||||||
10645 | Redeclaration = true; | ||||||
10646 | OldDecl = ND; | ||||||
10647 | return false; | ||||||
10648 | } | ||||||
10649 | |||||||
10650 | // If the declarations don't match, this is an error condition. | ||||||
10651 | S.Diag(NewFD->getLocation(), diag::err_cpu_dispatch_mismatch); | ||||||
10652 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10653 | NewFD->setInvalidDecl(); | ||||||
10654 | return true; | ||||||
10655 | } | ||||||
10656 | if (NewMVType == MultiVersionKind::CPUSpecific && CurCPUSpec) { | ||||||
10657 | |||||||
10658 | if (CurCPUSpec->cpus_size() == NewCPUSpec->cpus_size() && | ||||||
10659 | std::equal( | ||||||
10660 | CurCPUSpec->cpus_begin(), CurCPUSpec->cpus_end(), | ||||||
10661 | NewCPUSpec->cpus_begin(), | ||||||
10662 | [](const IdentifierInfo *Cur, const IdentifierInfo *New) { | ||||||
10663 | return Cur->getName() == New->getName(); | ||||||
10664 | })) { | ||||||
10665 | NewFD->setIsMultiVersion(); | ||||||
10666 | Redeclaration = true; | ||||||
10667 | OldDecl = ND; | ||||||
10668 | return false; | ||||||
10669 | } | ||||||
10670 | |||||||
10671 | // Only 1 version of CPUSpecific is allowed for each CPU. | ||||||
10672 | for (const IdentifierInfo *CurII : CurCPUSpec->cpus()) { | ||||||
10673 | for (const IdentifierInfo *NewII : NewCPUSpec->cpus()) { | ||||||
10674 | if (CurII == NewII) { | ||||||
10675 | S.Diag(NewFD->getLocation(), diag::err_cpu_specific_multiple_defs) | ||||||
10676 | << NewII; | ||||||
10677 | S.Diag(CurFD->getLocation(), diag::note_previous_declaration); | ||||||
10678 | NewFD->setInvalidDecl(); | ||||||
10679 | return true; | ||||||
10680 | } | ||||||
10681 | } | ||||||
10682 | } | ||||||
10683 | } | ||||||
10684 | // If the two decls aren't the same MVType, there is no possible error | ||||||
10685 | // condition. | ||||||
10686 | } | ||||||
10687 | } | ||||||
10688 | |||||||
10689 | // Else, this is simply a non-redecl case. Checking the 'value' is only | ||||||
10690 | // necessary in the Target case, since The CPUSpecific/Dispatch cases are | ||||||
10691 | // handled in the attribute adding step. | ||||||
10692 | if (NewMVType == MultiVersionKind::Target && | ||||||
10693 | CheckMultiVersionValue(S, NewFD)) { | ||||||
10694 | NewFD->setInvalidDecl(); | ||||||
10695 | return true; | ||||||
10696 | } | ||||||
10697 | |||||||
10698 | if (CheckMultiVersionAdditionalRules(S, OldFD, NewFD, | ||||||
10699 | !OldFD->isMultiVersion(), NewMVType)) { | ||||||
10700 | NewFD->setInvalidDecl(); | ||||||
10701 | return true; | ||||||
10702 | } | ||||||
10703 | |||||||
10704 | // Permit forward declarations in the case where these two are compatible. | ||||||
10705 | if (!OldFD->isMultiVersion()) { | ||||||
10706 | OldFD->setIsMultiVersion(); | ||||||
10707 | NewFD->setIsMultiVersion(); | ||||||
10708 | Redeclaration = true; | ||||||
10709 | OldDecl = OldFD; | ||||||
10710 | return false; | ||||||
10711 | } | ||||||
10712 | |||||||
10713 | NewFD->setIsMultiVersion(); | ||||||
10714 | Redeclaration = false; | ||||||
10715 | MergeTypeWithPrevious = false; | ||||||
10716 | OldDecl = nullptr; | ||||||
10717 | Previous.clear(); | ||||||
10718 | return false; | ||||||
10719 | } | ||||||
10720 | |||||||
10721 | |||||||
10722 | /// Check the validity of a mulitversion function declaration. | ||||||
10723 | /// Also sets the multiversion'ness' of the function itself. | ||||||
10724 | /// | ||||||
10725 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10726 | /// | ||||||
10727 | /// Returns true if there was an error, false otherwise. | ||||||
10728 | static bool CheckMultiVersionFunction(Sema &S, FunctionDecl *NewFD, | ||||||
10729 | bool &Redeclaration, NamedDecl *&OldDecl, | ||||||
10730 | bool &MergeTypeWithPrevious, | ||||||
10731 | LookupResult &Previous) { | ||||||
10732 | const auto *NewTA = NewFD->getAttr<TargetAttr>(); | ||||||
10733 | const auto *NewCPUDisp = NewFD->getAttr<CPUDispatchAttr>(); | ||||||
10734 | const auto *NewCPUSpec = NewFD->getAttr<CPUSpecificAttr>(); | ||||||
10735 | |||||||
10736 | // Mixing Multiversioning types is prohibited. | ||||||
10737 | if ((NewTA && NewCPUDisp) || (NewTA && NewCPUSpec) || | ||||||
10738 | (NewCPUDisp && NewCPUSpec)) { | ||||||
10739 | S.Diag(NewFD->getLocation(), diag::err_multiversion_types_mixed); | ||||||
10740 | NewFD->setInvalidDecl(); | ||||||
10741 | return true; | ||||||
10742 | } | ||||||
10743 | |||||||
10744 | MultiVersionKind MVType = NewFD->getMultiVersionKind(); | ||||||
10745 | |||||||
10746 | // Main isn't allowed to become a multiversion function, however it IS | ||||||
10747 | // permitted to have 'main' be marked with the 'target' optimization hint. | ||||||
10748 | if (NewFD->isMain()) { | ||||||
10749 | if ((MVType == MultiVersionKind::Target && NewTA->isDefaultVersion()) || | ||||||
10750 | MVType == MultiVersionKind::CPUDispatch || | ||||||
10751 | MVType == MultiVersionKind::CPUSpecific) { | ||||||
10752 | S.Diag(NewFD->getLocation(), diag::err_multiversion_not_allowed_on_main); | ||||||
10753 | NewFD->setInvalidDecl(); | ||||||
10754 | return true; | ||||||
10755 | } | ||||||
10756 | return false; | ||||||
10757 | } | ||||||
10758 | |||||||
10759 | if (!OldDecl || !OldDecl->getAsFunction() || | ||||||
10760 | OldDecl->getDeclContext()->getRedeclContext() != | ||||||
10761 | NewFD->getDeclContext()->getRedeclContext()) { | ||||||
10762 | // If there's no previous declaration, AND this isn't attempting to cause | ||||||
10763 | // multiversioning, this isn't an error condition. | ||||||
10764 | if (MVType == MultiVersionKind::None) | ||||||
10765 | return false; | ||||||
10766 | return CheckMultiVersionFirstFunction(S, NewFD, MVType, NewTA); | ||||||
10767 | } | ||||||
10768 | |||||||
10769 | FunctionDecl *OldFD = OldDecl->getAsFunction(); | ||||||
10770 | |||||||
10771 | if (!OldFD->isMultiVersion() && MVType == MultiVersionKind::None) | ||||||
10772 | return false; | ||||||
10773 | |||||||
10774 | if (OldFD->isMultiVersion() && MVType == MultiVersionKind::None) { | ||||||
10775 | S.Diag(NewFD->getLocation(), diag::err_multiversion_required_in_redecl) | ||||||
10776 | << (OldFD->getMultiVersionKind() != MultiVersionKind::Target); | ||||||
10777 | NewFD->setInvalidDecl(); | ||||||
10778 | return true; | ||||||
10779 | } | ||||||
10780 | |||||||
10781 | // Handle the target potentially causes multiversioning case. | ||||||
10782 | if (!OldFD->isMultiVersion() && MVType == MultiVersionKind::Target) | ||||||
10783 | return CheckTargetCausesMultiVersioning(S, OldFD, NewFD, NewTA, | ||||||
10784 | Redeclaration, OldDecl, | ||||||
10785 | MergeTypeWithPrevious, Previous); | ||||||
10786 | |||||||
10787 | // At this point, we have a multiversion function decl (in OldFD) AND an | ||||||
10788 | // appropriate attribute in the current function decl. Resolve that these are | ||||||
10789 | // still compatible with previous declarations. | ||||||
10790 | return CheckMultiVersionAdditionalDecl( | ||||||
10791 | S, OldFD, NewFD, MVType, NewTA, NewCPUDisp, NewCPUSpec, Redeclaration, | ||||||
10792 | OldDecl, MergeTypeWithPrevious, Previous); | ||||||
10793 | } | ||||||
10794 | |||||||
10795 | /// Perform semantic checking of a new function declaration. | ||||||
10796 | /// | ||||||
10797 | /// Performs semantic analysis of the new function declaration | ||||||
10798 | /// NewFD. This routine performs all semantic checking that does not | ||||||
10799 | /// require the actual declarator involved in the declaration, and is | ||||||
10800 | /// used both for the declaration of functions as they are parsed | ||||||
10801 | /// (called via ActOnDeclarator) and for the declaration of functions | ||||||
10802 | /// that have been instantiated via C++ template instantiation (called | ||||||
10803 | /// via InstantiateDecl). | ||||||
10804 | /// | ||||||
10805 | /// \param IsMemberSpecialization whether this new function declaration is | ||||||
10806 | /// a member specialization (that replaces any definition provided by the | ||||||
10807 | /// previous declaration). | ||||||
10808 | /// | ||||||
10809 | /// This sets NewFD->isInvalidDecl() to true if there was an error. | ||||||
10810 | /// | ||||||
10811 | /// \returns true if the function declaration is a redeclaration. | ||||||
10812 | bool Sema::CheckFunctionDeclaration(Scope *S, FunctionDecl *NewFD, | ||||||
10813 | LookupResult &Previous, | ||||||
10814 | bool IsMemberSpecialization) { | ||||||
10815 | assert(!NewFD->getReturnType()->isVariablyModifiedType() &&(static_cast <bool> (!NewFD->getReturnType()->isVariablyModifiedType () && "Variably modified return types are not handled here" ) ? void (0) : __assert_fail ("!NewFD->getReturnType()->isVariablyModifiedType() && \"Variably modified return types are not handled here\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10816, __extension__ __PRETTY_FUNCTION__)) | ||||||
10816 | "Variably modified return types are not handled here")(static_cast <bool> (!NewFD->getReturnType()->isVariablyModifiedType () && "Variably modified return types are not handled here" ) ? void (0) : __assert_fail ("!NewFD->getReturnType()->isVariablyModifiedType() && \"Variably modified return types are not handled here\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10816, __extension__ __PRETTY_FUNCTION__)); | ||||||
10817 | |||||||
10818 | // Determine whether the type of this function should be merged with | ||||||
10819 | // a previous visible declaration. This never happens for functions in C++, | ||||||
10820 | // and always happens in C if the previous declaration was visible. | ||||||
10821 | bool MergeTypeWithPrevious = !getLangOpts().CPlusPlus && | ||||||
10822 | !Previous.isShadowed(); | ||||||
10823 | |||||||
10824 | bool Redeclaration = false; | ||||||
10825 | NamedDecl *OldDecl = nullptr; | ||||||
10826 | bool MayNeedOverloadableChecks = false; | ||||||
10827 | |||||||
10828 | // Merge or overload the declaration with an existing declaration of | ||||||
10829 | // the same name, if appropriate. | ||||||
10830 | if (!Previous.empty()) { | ||||||
10831 | // Determine whether NewFD is an overload of PrevDecl or | ||||||
10832 | // a declaration that requires merging. If it's an overload, | ||||||
10833 | // there's no more work to do here; we'll just add the new | ||||||
10834 | // function to the scope. | ||||||
10835 | if (!AllowOverloadingOfFunction(Previous, Context, NewFD)) { | ||||||
10836 | NamedDecl *Candidate = Previous.getRepresentativeDecl(); | ||||||
10837 | if (shouldLinkPossiblyHiddenDecl(Candidate, NewFD)) { | ||||||
10838 | Redeclaration = true; | ||||||
10839 | OldDecl = Candidate; | ||||||
10840 | } | ||||||
10841 | } else { | ||||||
10842 | MayNeedOverloadableChecks = true; | ||||||
10843 | switch (CheckOverload(S, NewFD, Previous, OldDecl, | ||||||
10844 | /*NewIsUsingDecl*/ false)) { | ||||||
10845 | case Ovl_Match: | ||||||
10846 | Redeclaration = true; | ||||||
10847 | break; | ||||||
10848 | |||||||
10849 | case Ovl_NonFunction: | ||||||
10850 | Redeclaration = true; | ||||||
10851 | break; | ||||||
10852 | |||||||
10853 | case Ovl_Overload: | ||||||
10854 | Redeclaration = false; | ||||||
10855 | break; | ||||||
10856 | } | ||||||
10857 | } | ||||||
10858 | } | ||||||
10859 | |||||||
10860 | // Check for a previous extern "C" declaration with this name. | ||||||
10861 | if (!Redeclaration && | ||||||
10862 | checkForConflictWithNonVisibleExternC(*this, NewFD, Previous)) { | ||||||
10863 | if (!Previous.empty()) { | ||||||
10864 | // This is an extern "C" declaration with the same name as a previous | ||||||
10865 | // declaration, and thus redeclares that entity... | ||||||
10866 | Redeclaration = true; | ||||||
10867 | OldDecl = Previous.getFoundDecl(); | ||||||
10868 | MergeTypeWithPrevious = false; | ||||||
10869 | |||||||
10870 | // ... except in the presence of __attribute__((overloadable)). | ||||||
10871 | if (OldDecl->hasAttr<OverloadableAttr>() || | ||||||
10872 | NewFD->hasAttr<OverloadableAttr>()) { | ||||||
10873 | if (IsOverload(NewFD, cast<FunctionDecl>(OldDecl), false)) { | ||||||
10874 | MayNeedOverloadableChecks = true; | ||||||
10875 | Redeclaration = false; | ||||||
10876 | OldDecl = nullptr; | ||||||
10877 | } | ||||||
10878 | } | ||||||
10879 | } | ||||||
10880 | } | ||||||
10881 | |||||||
10882 | if (CheckMultiVersionFunction(*this, NewFD, Redeclaration, OldDecl, | ||||||
10883 | MergeTypeWithPrevious, Previous)) | ||||||
10884 | return Redeclaration; | ||||||
10885 | |||||||
10886 | // PPC MMA non-pointer types are not allowed as function return types. | ||||||
10887 | if (Context.getTargetInfo().getTriple().isPPC64() && | ||||||
10888 | CheckPPCMMAType(NewFD->getReturnType(), NewFD->getLocation())) { | ||||||
10889 | NewFD->setInvalidDecl(); | ||||||
10890 | } | ||||||
10891 | |||||||
10892 | // C++11 [dcl.constexpr]p8: | ||||||
10893 | // A constexpr specifier for a non-static member function that is not | ||||||
10894 | // a constructor declares that member function to be const. | ||||||
10895 | // | ||||||
10896 | // This needs to be delayed until we know whether this is an out-of-line | ||||||
10897 | // definition of a static member function. | ||||||
10898 | // | ||||||
10899 | // This rule is not present in C++1y, so we produce a backwards | ||||||
10900 | // compatibility warning whenever it happens in C++11. | ||||||
10901 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(NewFD); | ||||||
10902 | if (!getLangOpts().CPlusPlus14 && MD && MD->isConstexpr() && | ||||||
10903 | !MD->isStatic() && !isa<CXXConstructorDecl>(MD) && | ||||||
10904 | !isa<CXXDestructorDecl>(MD) && !MD->getMethodQualifiers().hasConst()) { | ||||||
10905 | CXXMethodDecl *OldMD = nullptr; | ||||||
10906 | if (OldDecl) | ||||||
10907 | OldMD = dyn_cast_or_null<CXXMethodDecl>(OldDecl->getAsFunction()); | ||||||
10908 | if (!OldMD || !OldMD->isStatic()) { | ||||||
10909 | const FunctionProtoType *FPT = | ||||||
10910 | MD->getType()->castAs<FunctionProtoType>(); | ||||||
10911 | FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); | ||||||
10912 | EPI.TypeQuals.addConst(); | ||||||
10913 | MD->setType(Context.getFunctionType(FPT->getReturnType(), | ||||||
10914 | FPT->getParamTypes(), EPI)); | ||||||
10915 | |||||||
10916 | // Warn that we did this, if we're not performing template instantiation. | ||||||
10917 | // In that case, we'll have warned already when the template was defined. | ||||||
10918 | if (!inTemplateInstantiation()) { | ||||||
10919 | SourceLocation AddConstLoc; | ||||||
10920 | if (FunctionTypeLoc FTL = MD->getTypeSourceInfo()->getTypeLoc() | ||||||
10921 | .IgnoreParens().getAs<FunctionTypeLoc>()) | ||||||
10922 | AddConstLoc = getLocForEndOfToken(FTL.getRParenLoc()); | ||||||
10923 | |||||||
10924 | Diag(MD->getLocation(), diag::warn_cxx14_compat_constexpr_not_const) | ||||||
10925 | << FixItHint::CreateInsertion(AddConstLoc, " const"); | ||||||
10926 | } | ||||||
10927 | } | ||||||
10928 | } | ||||||
10929 | |||||||
10930 | if (Redeclaration) { | ||||||
10931 | // NewFD and OldDecl represent declarations that need to be | ||||||
10932 | // merged. | ||||||
10933 | if (MergeFunctionDecl(NewFD, OldDecl, S, MergeTypeWithPrevious)) { | ||||||
10934 | NewFD->setInvalidDecl(); | ||||||
10935 | return Redeclaration; | ||||||
10936 | } | ||||||
10937 | |||||||
10938 | Previous.clear(); | ||||||
10939 | Previous.addDecl(OldDecl); | ||||||
10940 | |||||||
10941 | if (FunctionTemplateDecl *OldTemplateDecl = | ||||||
10942 | dyn_cast<FunctionTemplateDecl>(OldDecl)) { | ||||||
10943 | auto *OldFD = OldTemplateDecl->getTemplatedDecl(); | ||||||
10944 | FunctionTemplateDecl *NewTemplateDecl | ||||||
10945 | = NewFD->getDescribedFunctionTemplate(); | ||||||
10946 | assert(NewTemplateDecl && "Template/non-template mismatch")(static_cast <bool> (NewTemplateDecl && "Template/non-template mismatch" ) ? void (0) : __assert_fail ("NewTemplateDecl && \"Template/non-template mismatch\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10946, __extension__ __PRETTY_FUNCTION__)); | ||||||
10947 | |||||||
10948 | // The call to MergeFunctionDecl above may have created some state in | ||||||
10949 | // NewTemplateDecl that needs to be merged with OldTemplateDecl before we | ||||||
10950 | // can add it as a redeclaration. | ||||||
10951 | NewTemplateDecl->mergePrevDecl(OldTemplateDecl); | ||||||
10952 | |||||||
10953 | NewFD->setPreviousDeclaration(OldFD); | ||||||
10954 | if (NewFD->isCXXClassMember()) { | ||||||
10955 | NewFD->setAccess(OldTemplateDecl->getAccess()); | ||||||
10956 | NewTemplateDecl->setAccess(OldTemplateDecl->getAccess()); | ||||||
10957 | } | ||||||
10958 | |||||||
10959 | // If this is an explicit specialization of a member that is a function | ||||||
10960 | // template, mark it as a member specialization. | ||||||
10961 | if (IsMemberSpecialization && | ||||||
10962 | NewTemplateDecl->getInstantiatedFromMemberTemplate()) { | ||||||
10963 | NewTemplateDecl->setMemberSpecialization(); | ||||||
10964 | assert(OldTemplateDecl->isMemberSpecialization())(static_cast <bool> (OldTemplateDecl->isMemberSpecialization ()) ? void (0) : __assert_fail ("OldTemplateDecl->isMemberSpecialization()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10964, __extension__ __PRETTY_FUNCTION__)); | ||||||
10965 | // Explicit specializations of a member template do not inherit deleted | ||||||
10966 | // status from the parent member template that they are specializing. | ||||||
10967 | if (OldFD->isDeleted()) { | ||||||
10968 | // FIXME: This assert will not hold in the presence of modules. | ||||||
10969 | assert(OldFD->getCanonicalDecl() == OldFD)(static_cast <bool> (OldFD->getCanonicalDecl() == OldFD ) ? void (0) : __assert_fail ("OldFD->getCanonicalDecl() == OldFD" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10969, __extension__ __PRETTY_FUNCTION__)); | ||||||
10970 | // FIXME: We need an update record for this AST mutation. | ||||||
10971 | OldFD->setDeletedAsWritten(false); | ||||||
10972 | } | ||||||
10973 | } | ||||||
10974 | |||||||
10975 | } else { | ||||||
10976 | if (shouldLinkDependentDeclWithPrevious(NewFD, OldDecl)) { | ||||||
10977 | auto *OldFD = cast<FunctionDecl>(OldDecl); | ||||||
10978 | // This needs to happen first so that 'inline' propagates. | ||||||
10979 | NewFD->setPreviousDeclaration(OldFD); | ||||||
10980 | if (NewFD->isCXXClassMember()) | ||||||
10981 | NewFD->setAccess(OldFD->getAccess()); | ||||||
10982 | } | ||||||
10983 | } | ||||||
10984 | } else if (!getLangOpts().CPlusPlus && MayNeedOverloadableChecks && | ||||||
10985 | !NewFD->getAttr<OverloadableAttr>()) { | ||||||
10986 | assert((Previous.empty() ||(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10991, __extension__ __PRETTY_FUNCTION__)) | ||||||
10987 | llvm::any_of(Previous,(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10991, __extension__ __PRETTY_FUNCTION__)) | ||||||
10988 | [](const NamedDecl *ND) {(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10991, __extension__ __PRETTY_FUNCTION__)) | ||||||
10989 | return ND->hasAttr<OverloadableAttr>();(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10991, __extension__ __PRETTY_FUNCTION__)) | ||||||
10990 | })) &&(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10991, __extension__ __PRETTY_FUNCTION__)) | ||||||
10991 | "Non-redecls shouldn't happen without overloadable present")(static_cast <bool> ((Previous.empty() || llvm::any_of( Previous, [](const NamedDecl *ND) { return ND->hasAttr< OverloadableAttr>(); })) && "Non-redecls shouldn't happen without overloadable present" ) ? void (0) : __assert_fail ("(Previous.empty() || llvm::any_of(Previous, [](const NamedDecl *ND) { return ND->hasAttr<OverloadableAttr>(); })) && \"Non-redecls shouldn't happen without overloadable present\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 10991, __extension__ __PRETTY_FUNCTION__)); | ||||||
10992 | |||||||
10993 | auto OtherUnmarkedIter = llvm::find_if(Previous, [](const NamedDecl *ND) { | ||||||
10994 | const auto *FD = dyn_cast<FunctionDecl>(ND); | ||||||
10995 | return FD && !FD->hasAttr<OverloadableAttr>(); | ||||||
10996 | }); | ||||||
10997 | |||||||
10998 | if (OtherUnmarkedIter != Previous.end()) { | ||||||
10999 | Diag(NewFD->getLocation(), | ||||||
11000 | diag::err_attribute_overloadable_multiple_unmarked_overloads); | ||||||
11001 | Diag((*OtherUnmarkedIter)->getLocation(), | ||||||
11002 | diag::note_attribute_overloadable_prev_overload) | ||||||
11003 | << false; | ||||||
11004 | |||||||
11005 | NewFD->addAttr(OverloadableAttr::CreateImplicit(Context)); | ||||||
11006 | } | ||||||
11007 | } | ||||||
11008 | |||||||
11009 | if (LangOpts.OpenMP) | ||||||
11010 | ActOnFinishedFunctionDefinitionInOpenMPAssumeScope(NewFD); | ||||||
11011 | |||||||
11012 | // Semantic checking for this function declaration (in isolation). | ||||||
11013 | |||||||
11014 | if (getLangOpts().CPlusPlus) { | ||||||
11015 | // C++-specific checks. | ||||||
11016 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(NewFD)) { | ||||||
11017 | CheckConstructor(Constructor); | ||||||
11018 | } else if (CXXDestructorDecl *Destructor = | ||||||
11019 | dyn_cast<CXXDestructorDecl>(NewFD)) { | ||||||
11020 | CXXRecordDecl *Record = Destructor->getParent(); | ||||||
11021 | QualType ClassType = Context.getTypeDeclType(Record); | ||||||
11022 | |||||||
11023 | // FIXME: Shouldn't we be able to perform this check even when the class | ||||||
11024 | // type is dependent? Both gcc and edg can handle that. | ||||||
11025 | if (!ClassType->isDependentType()) { | ||||||
11026 | DeclarationName Name | ||||||
11027 | = Context.DeclarationNames.getCXXDestructorName( | ||||||
11028 | Context.getCanonicalType(ClassType)); | ||||||
11029 | if (NewFD->getDeclName() != Name) { | ||||||
11030 | Diag(NewFD->getLocation(), diag::err_destructor_name); | ||||||
11031 | NewFD->setInvalidDecl(); | ||||||
11032 | return Redeclaration; | ||||||
11033 | } | ||||||
11034 | } | ||||||
11035 | } else if (auto *Guide = dyn_cast<CXXDeductionGuideDecl>(NewFD)) { | ||||||
11036 | if (auto *TD = Guide->getDescribedFunctionTemplate()) | ||||||
11037 | CheckDeductionGuideTemplate(TD); | ||||||
11038 | |||||||
11039 | // A deduction guide is not on the list of entities that can be | ||||||
11040 | // explicitly specialized. | ||||||
11041 | if (Guide->getTemplateSpecializationKind() == TSK_ExplicitSpecialization) | ||||||
11042 | Diag(Guide->getBeginLoc(), diag::err_deduction_guide_specialized) | ||||||
11043 | << /*explicit specialization*/ 1; | ||||||
11044 | } | ||||||
11045 | |||||||
11046 | // Find any virtual functions that this function overrides. | ||||||
11047 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(NewFD)) { | ||||||
11048 | if (!Method->isFunctionTemplateSpecialization() && | ||||||
11049 | !Method->getDescribedFunctionTemplate() && | ||||||
11050 | Method->isCanonicalDecl()) { | ||||||
11051 | AddOverriddenMethods(Method->getParent(), Method); | ||||||
11052 | } | ||||||
11053 | if (Method->isVirtual() && NewFD->getTrailingRequiresClause()) | ||||||
11054 | // C++2a [class.virtual]p6 | ||||||
11055 | // A virtual method shall not have a requires-clause. | ||||||
11056 | Diag(NewFD->getTrailingRequiresClause()->getBeginLoc(), | ||||||
11057 | diag::err_constrained_virtual_method); | ||||||
11058 | |||||||
11059 | if (Method->isStatic()) | ||||||
11060 | checkThisInStaticMemberFunctionType(Method); | ||||||
11061 | } | ||||||
11062 | |||||||
11063 | if (CXXConversionDecl *Conversion = dyn_cast<CXXConversionDecl>(NewFD)) | ||||||
11064 | ActOnConversionDeclarator(Conversion); | ||||||
11065 | |||||||
11066 | // Extra checking for C++ overloaded operators (C++ [over.oper]). | ||||||
11067 | if (NewFD->isOverloadedOperator() && | ||||||
11068 | CheckOverloadedOperatorDeclaration(NewFD)) { | ||||||
11069 | NewFD->setInvalidDecl(); | ||||||
11070 | return Redeclaration; | ||||||
11071 | } | ||||||
11072 | |||||||
11073 | // Extra checking for C++0x literal operators (C++0x [over.literal]). | ||||||
11074 | if (NewFD->getLiteralIdentifier() && | ||||||
11075 | CheckLiteralOperatorDeclaration(NewFD)) { | ||||||
11076 | NewFD->setInvalidDecl(); | ||||||
11077 | return Redeclaration; | ||||||
11078 | } | ||||||
11079 | |||||||
11080 | // In C++, check default arguments now that we have merged decls. Unless | ||||||
11081 | // the lexical context is the class, because in this case this is done | ||||||
11082 | // during delayed parsing anyway. | ||||||
11083 | if (!CurContext->isRecord()) | ||||||
11084 | CheckCXXDefaultArguments(NewFD); | ||||||
11085 | |||||||
11086 | // If this function is declared as being extern "C", then check to see if | ||||||
11087 | // the function returns a UDT (class, struct, or union type) that is not C | ||||||
11088 | // compatible, and if it does, warn the user. | ||||||
11089 | // But, issue any diagnostic on the first declaration only. | ||||||
11090 | if (Previous.empty() && NewFD->isExternC()) { | ||||||
11091 | QualType R = NewFD->getReturnType(); | ||||||
11092 | if (R->isIncompleteType() && !R->isVoidType()) | ||||||
11093 | Diag(NewFD->getLocation(), diag::warn_return_value_udt_incomplete) | ||||||
11094 | << NewFD << R; | ||||||
11095 | else if (!R.isPODType(Context) && !R->isVoidType() && | ||||||
11096 | !R->isObjCObjectPointerType()) | ||||||
11097 | Diag(NewFD->getLocation(), diag::warn_return_value_udt) << NewFD << R; | ||||||
11098 | } | ||||||
11099 | |||||||
11100 | // C++1z [dcl.fct]p6: | ||||||
11101 | // [...] whether the function has a non-throwing exception-specification | ||||||
11102 | // [is] part of the function type | ||||||
11103 | // | ||||||
11104 | // This results in an ABI break between C++14 and C++17 for functions whose | ||||||
11105 | // declared type includes an exception-specification in a parameter or | ||||||
11106 | // return type. (Exception specifications on the function itself are OK in | ||||||
11107 | // most cases, and exception specifications are not permitted in most other | ||||||
11108 | // contexts where they could make it into a mangling.) | ||||||
11109 | if (!getLangOpts().CPlusPlus17 && !NewFD->getPrimaryTemplate()) { | ||||||
11110 | auto HasNoexcept = [&](QualType T) -> bool { | ||||||
11111 | // Strip off declarator chunks that could be between us and a function | ||||||
11112 | // type. We don't need to look far, exception specifications are very | ||||||
11113 | // restricted prior to C++17. | ||||||
11114 | if (auto *RT = T->getAs<ReferenceType>()) | ||||||
11115 | T = RT->getPointeeType(); | ||||||
11116 | else if (T->isAnyPointerType()) | ||||||
11117 | T = T->getPointeeType(); | ||||||
11118 | else if (auto *MPT = T->getAs<MemberPointerType>()) | ||||||
11119 | T = MPT->getPointeeType(); | ||||||
11120 | if (auto *FPT = T->getAs<FunctionProtoType>()) | ||||||
11121 | if (FPT->isNothrow()) | ||||||
11122 | return true; | ||||||
11123 | return false; | ||||||
11124 | }; | ||||||
11125 | |||||||
11126 | auto *FPT = NewFD->getType()->castAs<FunctionProtoType>(); | ||||||
11127 | bool AnyNoexcept = HasNoexcept(FPT->getReturnType()); | ||||||
11128 | for (QualType T : FPT->param_types()) | ||||||
11129 | AnyNoexcept |= HasNoexcept(T); | ||||||
11130 | if (AnyNoexcept) | ||||||
11131 | Diag(NewFD->getLocation(), | ||||||
11132 | diag::warn_cxx17_compat_exception_spec_in_signature) | ||||||
11133 | << NewFD; | ||||||
11134 | } | ||||||
11135 | |||||||
11136 | if (!Redeclaration && LangOpts.CUDA) | ||||||
11137 | checkCUDATargetOverload(NewFD, Previous); | ||||||
11138 | } | ||||||
11139 | return Redeclaration; | ||||||
11140 | } | ||||||
11141 | |||||||
11142 | void Sema::CheckMain(FunctionDecl* FD, const DeclSpec& DS) { | ||||||
11143 | // C++11 [basic.start.main]p3: | ||||||
11144 | // A program that [...] declares main to be inline, static or | ||||||
11145 | // constexpr is ill-formed. | ||||||
11146 | // C11 6.7.4p4: In a hosted environment, no function specifier(s) shall | ||||||
11147 | // appear in a declaration of main. | ||||||
11148 | // static main is not an error under C99, but we should warn about it. | ||||||
11149 | // We accept _Noreturn main as an extension. | ||||||
11150 | if (FD->getStorageClass() == SC_Static) | ||||||
11151 | Diag(DS.getStorageClassSpecLoc(), getLangOpts().CPlusPlus | ||||||
11152 | ? diag::err_static_main : diag::warn_static_main) | ||||||
11153 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
11154 | if (FD->isInlineSpecified()) | ||||||
11155 | Diag(DS.getInlineSpecLoc(), diag::err_inline_main) | ||||||
11156 | << FixItHint::CreateRemoval(DS.getInlineSpecLoc()); | ||||||
11157 | if (DS.isNoreturnSpecified()) { | ||||||
11158 | SourceLocation NoreturnLoc = DS.getNoreturnSpecLoc(); | ||||||
11159 | SourceRange NoreturnRange(NoreturnLoc, getLocForEndOfToken(NoreturnLoc)); | ||||||
11160 | Diag(NoreturnLoc, diag::ext_noreturn_main); | ||||||
11161 | Diag(NoreturnLoc, diag::note_main_remove_noreturn) | ||||||
11162 | << FixItHint::CreateRemoval(NoreturnRange); | ||||||
11163 | } | ||||||
11164 | if (FD->isConstexpr()) { | ||||||
11165 | Diag(DS.getConstexprSpecLoc(), diag::err_constexpr_main) | ||||||
11166 | << FD->isConsteval() | ||||||
11167 | << FixItHint::CreateRemoval(DS.getConstexprSpecLoc()); | ||||||
11168 | FD->setConstexprKind(ConstexprSpecKind::Unspecified); | ||||||
11169 | } | ||||||
11170 | |||||||
11171 | if (getLangOpts().OpenCL) { | ||||||
11172 | Diag(FD->getLocation(), diag::err_opencl_no_main) | ||||||
11173 | << FD->hasAttr<OpenCLKernelAttr>(); | ||||||
11174 | FD->setInvalidDecl(); | ||||||
11175 | return; | ||||||
11176 | } | ||||||
11177 | |||||||
11178 | QualType T = FD->getType(); | ||||||
11179 | assert(T->isFunctionType() && "function decl is not of function type")(static_cast <bool> (T->isFunctionType() && "function decl is not of function type" ) ? void (0) : __assert_fail ("T->isFunctionType() && \"function decl is not of function type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11179, __extension__ __PRETTY_FUNCTION__)); | ||||||
11180 | const FunctionType* FT = T->castAs<FunctionType>(); | ||||||
11181 | |||||||
11182 | // Set default calling convention for main() | ||||||
11183 | if (FT->getCallConv() != CC_C) { | ||||||
11184 | FT = Context.adjustFunctionType(FT, FT->getExtInfo().withCallingConv(CC_C)); | ||||||
11185 | FD->setType(QualType(FT, 0)); | ||||||
11186 | T = Context.getCanonicalType(FD->getType()); | ||||||
11187 | } | ||||||
11188 | |||||||
11189 | if (getLangOpts().GNUMode && !getLangOpts().CPlusPlus) { | ||||||
11190 | // In C with GNU extensions we allow main() to have non-integer return | ||||||
11191 | // type, but we should warn about the extension, and we disable the | ||||||
11192 | // implicit-return-zero rule. | ||||||
11193 | |||||||
11194 | // GCC in C mode accepts qualified 'int'. | ||||||
11195 | if (Context.hasSameUnqualifiedType(FT->getReturnType(), Context.IntTy)) | ||||||
11196 | FD->setHasImplicitReturnZero(true); | ||||||
11197 | else { | ||||||
11198 | Diag(FD->getTypeSpecStartLoc(), diag::ext_main_returns_nonint); | ||||||
11199 | SourceRange RTRange = FD->getReturnTypeSourceRange(); | ||||||
11200 | if (RTRange.isValid()) | ||||||
11201 | Diag(RTRange.getBegin(), diag::note_main_change_return_type) | ||||||
11202 | << FixItHint::CreateReplacement(RTRange, "int"); | ||||||
11203 | } | ||||||
11204 | } else { | ||||||
11205 | // In C and C++, main magically returns 0 if you fall off the end; | ||||||
11206 | // set the flag which tells us that. | ||||||
11207 | // This is C++ [basic.start.main]p5 and C99 5.1.2.2.3. | ||||||
11208 | |||||||
11209 | // All the standards say that main() should return 'int'. | ||||||
11210 | if (Context.hasSameType(FT->getReturnType(), Context.IntTy)) | ||||||
11211 | FD->setHasImplicitReturnZero(true); | ||||||
11212 | else { | ||||||
11213 | // Otherwise, this is just a flat-out error. | ||||||
11214 | SourceRange RTRange = FD->getReturnTypeSourceRange(); | ||||||
11215 | Diag(FD->getTypeSpecStartLoc(), diag::err_main_returns_nonint) | ||||||
11216 | << (RTRange.isValid() ? FixItHint::CreateReplacement(RTRange, "int") | ||||||
11217 | : FixItHint()); | ||||||
11218 | FD->setInvalidDecl(true); | ||||||
11219 | } | ||||||
11220 | } | ||||||
11221 | |||||||
11222 | // Treat protoless main() as nullary. | ||||||
11223 | if (isa<FunctionNoProtoType>(FT)) return; | ||||||
11224 | |||||||
11225 | const FunctionProtoType* FTP = cast<const FunctionProtoType>(FT); | ||||||
11226 | unsigned nparams = FTP->getNumParams(); | ||||||
11227 | assert(FD->getNumParams() == nparams)(static_cast <bool> (FD->getNumParams() == nparams) ? void (0) : __assert_fail ("FD->getNumParams() == nparams" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11227, __extension__ __PRETTY_FUNCTION__)); | ||||||
11228 | |||||||
11229 | bool HasExtraParameters = (nparams > 3); | ||||||
11230 | |||||||
11231 | if (FTP->isVariadic()) { | ||||||
11232 | Diag(FD->getLocation(), diag::ext_variadic_main); | ||||||
11233 | // FIXME: if we had information about the location of the ellipsis, we | ||||||
11234 | // could add a FixIt hint to remove it as a parameter. | ||||||
11235 | } | ||||||
11236 | |||||||
11237 | // Darwin passes an undocumented fourth argument of type char**. If | ||||||
11238 | // other platforms start sprouting these, the logic below will start | ||||||
11239 | // getting shifty. | ||||||
11240 | if (nparams == 4 && Context.getTargetInfo().getTriple().isOSDarwin()) | ||||||
11241 | HasExtraParameters = false; | ||||||
11242 | |||||||
11243 | if (HasExtraParameters) { | ||||||
11244 | Diag(FD->getLocation(), diag::err_main_surplus_args) << nparams; | ||||||
11245 | FD->setInvalidDecl(true); | ||||||
11246 | nparams = 3; | ||||||
11247 | } | ||||||
11248 | |||||||
11249 | // FIXME: a lot of the following diagnostics would be improved | ||||||
11250 | // if we had some location information about types. | ||||||
11251 | |||||||
11252 | QualType CharPP = | ||||||
11253 | Context.getPointerType(Context.getPointerType(Context.CharTy)); | ||||||
11254 | QualType Expected[] = { Context.IntTy, CharPP, CharPP, CharPP }; | ||||||
11255 | |||||||
11256 | for (unsigned i = 0; i < nparams; ++i) { | ||||||
11257 | QualType AT = FTP->getParamType(i); | ||||||
11258 | |||||||
11259 | bool mismatch = true; | ||||||
11260 | |||||||
11261 | if (Context.hasSameUnqualifiedType(AT, Expected[i])) | ||||||
11262 | mismatch = false; | ||||||
11263 | else if (Expected[i] == CharPP) { | ||||||
11264 | // As an extension, the following forms are okay: | ||||||
11265 | // char const ** | ||||||
11266 | // char const * const * | ||||||
11267 | // char * const * | ||||||
11268 | |||||||
11269 | QualifierCollector qs; | ||||||
11270 | const PointerType* PT; | ||||||
11271 | if ((PT = qs.strip(AT)->getAs<PointerType>()) && | ||||||
11272 | (PT = qs.strip(PT->getPointeeType())->getAs<PointerType>()) && | ||||||
11273 | Context.hasSameType(QualType(qs.strip(PT->getPointeeType()), 0), | ||||||
11274 | Context.CharTy)) { | ||||||
11275 | qs.removeConst(); | ||||||
11276 | mismatch = !qs.empty(); | ||||||
11277 | } | ||||||
11278 | } | ||||||
11279 | |||||||
11280 | if (mismatch) { | ||||||
11281 | Diag(FD->getLocation(), diag::err_main_arg_wrong) << i << Expected[i]; | ||||||
11282 | // TODO: suggest replacing given type with expected type | ||||||
11283 | FD->setInvalidDecl(true); | ||||||
11284 | } | ||||||
11285 | } | ||||||
11286 | |||||||
11287 | if (nparams == 1 && !FD->isInvalidDecl()) { | ||||||
11288 | Diag(FD->getLocation(), diag::warn_main_one_arg); | ||||||
11289 | } | ||||||
11290 | |||||||
11291 | if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) { | ||||||
11292 | Diag(FD->getLocation(), diag::err_mainlike_template_decl) << FD; | ||||||
11293 | FD->setInvalidDecl(); | ||||||
11294 | } | ||||||
11295 | } | ||||||
11296 | |||||||
11297 | static bool isDefaultStdCall(FunctionDecl *FD, Sema &S) { | ||||||
11298 | |||||||
11299 | // Default calling convention for main and wmain is __cdecl | ||||||
11300 | if (FD->getName() == "main" || FD->getName() == "wmain") | ||||||
11301 | return false; | ||||||
11302 | |||||||
11303 | // Default calling convention for MinGW is __cdecl | ||||||
11304 | const llvm::Triple &T = S.Context.getTargetInfo().getTriple(); | ||||||
11305 | if (T.isWindowsGNUEnvironment()) | ||||||
11306 | return false; | ||||||
11307 | |||||||
11308 | // Default calling convention for WinMain, wWinMain and DllMain | ||||||
11309 | // is __stdcall on 32 bit Windows | ||||||
11310 | if (T.isOSWindows() && T.getArch() == llvm::Triple::x86) | ||||||
11311 | return true; | ||||||
11312 | |||||||
11313 | return false; | ||||||
11314 | } | ||||||
11315 | |||||||
11316 | void Sema::CheckMSVCRTEntryPoint(FunctionDecl *FD) { | ||||||
11317 | QualType T = FD->getType(); | ||||||
11318 | assert(T->isFunctionType() && "function decl is not of function type")(static_cast <bool> (T->isFunctionType() && "function decl is not of function type" ) ? void (0) : __assert_fail ("T->isFunctionType() && \"function decl is not of function type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11318, __extension__ __PRETTY_FUNCTION__)); | ||||||
11319 | const FunctionType *FT = T->castAs<FunctionType>(); | ||||||
11320 | |||||||
11321 | // Set an implicit return of 'zero' if the function can return some integral, | ||||||
11322 | // enumeration, pointer or nullptr type. | ||||||
11323 | if (FT->getReturnType()->isIntegralOrEnumerationType() || | ||||||
11324 | FT->getReturnType()->isAnyPointerType() || | ||||||
11325 | FT->getReturnType()->isNullPtrType()) | ||||||
11326 | // DllMain is exempt because a return value of zero means it failed. | ||||||
11327 | if (FD->getName() != "DllMain") | ||||||
11328 | FD->setHasImplicitReturnZero(true); | ||||||
11329 | |||||||
11330 | // Explicity specified calling conventions are applied to MSVC entry points | ||||||
11331 | if (!hasExplicitCallingConv(T)) { | ||||||
11332 | if (isDefaultStdCall(FD, *this)) { | ||||||
11333 | if (FT->getCallConv() != CC_X86StdCall) { | ||||||
11334 | FT = Context.adjustFunctionType( | ||||||
11335 | FT, FT->getExtInfo().withCallingConv(CC_X86StdCall)); | ||||||
11336 | FD->setType(QualType(FT, 0)); | ||||||
11337 | } | ||||||
11338 | } else if (FT->getCallConv() != CC_C) { | ||||||
11339 | FT = Context.adjustFunctionType(FT, | ||||||
11340 | FT->getExtInfo().withCallingConv(CC_C)); | ||||||
11341 | FD->setType(QualType(FT, 0)); | ||||||
11342 | } | ||||||
11343 | } | ||||||
11344 | |||||||
11345 | if (!FD->isInvalidDecl() && FD->getDescribedFunctionTemplate()) { | ||||||
11346 | Diag(FD->getLocation(), diag::err_mainlike_template_decl) << FD; | ||||||
11347 | FD->setInvalidDecl(); | ||||||
11348 | } | ||||||
11349 | } | ||||||
11350 | |||||||
11351 | bool Sema::CheckForConstantInitializer(Expr *Init, QualType DclT) { | ||||||
11352 | // FIXME: Need strict checking. In C89, we need to check for | ||||||
11353 | // any assignment, increment, decrement, function-calls, or | ||||||
11354 | // commas outside of a sizeof. In C99, it's the same list, | ||||||
11355 | // except that the aforementioned are allowed in unevaluated | ||||||
11356 | // expressions. Everything else falls under the | ||||||
11357 | // "may accept other forms of constant expressions" exception. | ||||||
11358 | // | ||||||
11359 | // Regular C++ code will not end up here (exceptions: language extensions, | ||||||
11360 | // OpenCL C++ etc), so the constant expression rules there don't matter. | ||||||
11361 | if (Init->isValueDependent()) { | ||||||
11362 | assert(Init->containsErrors() &&(static_cast <bool> (Init->containsErrors() && "Dependent code should only occur in error-recovery path.") ? void (0) : __assert_fail ("Init->containsErrors() && \"Dependent code should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11363, __extension__ __PRETTY_FUNCTION__)) | ||||||
11363 | "Dependent code should only occur in error-recovery path.")(static_cast <bool> (Init->containsErrors() && "Dependent code should only occur in error-recovery path.") ? void (0) : __assert_fail ("Init->containsErrors() && \"Dependent code should only occur in error-recovery path.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11363, __extension__ __PRETTY_FUNCTION__)); | ||||||
11364 | return true; | ||||||
11365 | } | ||||||
11366 | const Expr *Culprit; | ||||||
11367 | if (Init->isConstantInitializer(Context, false, &Culprit)) | ||||||
11368 | return false; | ||||||
11369 | Diag(Culprit->getExprLoc(), diag::err_init_element_not_constant) | ||||||
11370 | << Culprit->getSourceRange(); | ||||||
11371 | return true; | ||||||
11372 | } | ||||||
11373 | |||||||
11374 | namespace { | ||||||
11375 | // Visits an initialization expression to see if OrigDecl is evaluated in | ||||||
11376 | // its own initialization and throws a warning if it does. | ||||||
11377 | class SelfReferenceChecker | ||||||
11378 | : public EvaluatedExprVisitor<SelfReferenceChecker> { | ||||||
11379 | Sema &S; | ||||||
11380 | Decl *OrigDecl; | ||||||
11381 | bool isRecordType; | ||||||
11382 | bool isPODType; | ||||||
11383 | bool isReferenceType; | ||||||
11384 | |||||||
11385 | bool isInitList; | ||||||
11386 | llvm::SmallVector<unsigned, 4> InitFieldIndex; | ||||||
11387 | |||||||
11388 | public: | ||||||
11389 | typedef EvaluatedExprVisitor<SelfReferenceChecker> Inherited; | ||||||
11390 | |||||||
11391 | SelfReferenceChecker(Sema &S, Decl *OrigDecl) : Inherited(S.Context), | ||||||
11392 | S(S), OrigDecl(OrigDecl) { | ||||||
11393 | isPODType = false; | ||||||
11394 | isRecordType = false; | ||||||
11395 | isReferenceType = false; | ||||||
11396 | isInitList = false; | ||||||
11397 | if (ValueDecl *VD = dyn_cast<ValueDecl>(OrigDecl)) { | ||||||
11398 | isPODType = VD->getType().isPODType(S.Context); | ||||||
11399 | isRecordType = VD->getType()->isRecordType(); | ||||||
11400 | isReferenceType = VD->getType()->isReferenceType(); | ||||||
11401 | } | ||||||
11402 | } | ||||||
11403 | |||||||
11404 | // For most expressions, just call the visitor. For initializer lists, | ||||||
11405 | // track the index of the field being initialized since fields are | ||||||
11406 | // initialized in order allowing use of previously initialized fields. | ||||||
11407 | void CheckExpr(Expr *E) { | ||||||
11408 | InitListExpr *InitList = dyn_cast<InitListExpr>(E); | ||||||
11409 | if (!InitList) { | ||||||
11410 | Visit(E); | ||||||
11411 | return; | ||||||
11412 | } | ||||||
11413 | |||||||
11414 | // Track and increment the index here. | ||||||
11415 | isInitList = true; | ||||||
11416 | InitFieldIndex.push_back(0); | ||||||
11417 | for (auto Child : InitList->children()) { | ||||||
11418 | CheckExpr(cast<Expr>(Child)); | ||||||
11419 | ++InitFieldIndex.back(); | ||||||
11420 | } | ||||||
11421 | InitFieldIndex.pop_back(); | ||||||
11422 | } | ||||||
11423 | |||||||
11424 | // Returns true if MemberExpr is checked and no further checking is needed. | ||||||
11425 | // Returns false if additional checking is required. | ||||||
11426 | bool CheckInitListMemberExpr(MemberExpr *E, bool CheckReference) { | ||||||
11427 | llvm::SmallVector<FieldDecl*, 4> Fields; | ||||||
11428 | Expr *Base = E; | ||||||
11429 | bool ReferenceField = false; | ||||||
11430 | |||||||
11431 | // Get the field members used. | ||||||
11432 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11433 | FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl()); | ||||||
11434 | if (!FD) | ||||||
11435 | return false; | ||||||
11436 | Fields.push_back(FD); | ||||||
11437 | if (FD->getType()->isReferenceType()) | ||||||
11438 | ReferenceField = true; | ||||||
11439 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11440 | } | ||||||
11441 | |||||||
11442 | // Keep checking only if the base Decl is the same. | ||||||
11443 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base); | ||||||
11444 | if (!DRE || DRE->getDecl() != OrigDecl) | ||||||
11445 | return false; | ||||||
11446 | |||||||
11447 | // A reference field can be bound to an unininitialized field. | ||||||
11448 | if (CheckReference && !ReferenceField) | ||||||
11449 | return true; | ||||||
11450 | |||||||
11451 | // Convert FieldDecls to their index number. | ||||||
11452 | llvm::SmallVector<unsigned, 4> UsedFieldIndex; | ||||||
11453 | for (const FieldDecl *I : llvm::reverse(Fields)) | ||||||
11454 | UsedFieldIndex.push_back(I->getFieldIndex()); | ||||||
11455 | |||||||
11456 | // See if a warning is needed by checking the first difference in index | ||||||
11457 | // numbers. If field being used has index less than the field being | ||||||
11458 | // initialized, then the use is safe. | ||||||
11459 | for (auto UsedIter = UsedFieldIndex.begin(), | ||||||
11460 | UsedEnd = UsedFieldIndex.end(), | ||||||
11461 | OrigIter = InitFieldIndex.begin(), | ||||||
11462 | OrigEnd = InitFieldIndex.end(); | ||||||
11463 | UsedIter != UsedEnd && OrigIter != OrigEnd; ++UsedIter, ++OrigIter) { | ||||||
11464 | if (*UsedIter < *OrigIter) | ||||||
11465 | return true; | ||||||
11466 | if (*UsedIter > *OrigIter) | ||||||
11467 | break; | ||||||
11468 | } | ||||||
11469 | |||||||
11470 | // TODO: Add a different warning which will print the field names. | ||||||
11471 | HandleDeclRefExpr(DRE); | ||||||
11472 | return true; | ||||||
11473 | } | ||||||
11474 | |||||||
11475 | // For most expressions, the cast is directly above the DeclRefExpr. | ||||||
11476 | // For conditional operators, the cast can be outside the conditional | ||||||
11477 | // operator if both expressions are DeclRefExpr's. | ||||||
11478 | void HandleValue(Expr *E) { | ||||||
11479 | E = E->IgnoreParens(); | ||||||
11480 | if (DeclRefExpr* DRE = dyn_cast<DeclRefExpr>(E)) { | ||||||
11481 | HandleDeclRefExpr(DRE); | ||||||
11482 | return; | ||||||
11483 | } | ||||||
11484 | |||||||
11485 | if (ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E)) { | ||||||
11486 | Visit(CO->getCond()); | ||||||
11487 | HandleValue(CO->getTrueExpr()); | ||||||
11488 | HandleValue(CO->getFalseExpr()); | ||||||
11489 | return; | ||||||
11490 | } | ||||||
11491 | |||||||
11492 | if (BinaryConditionalOperator *BCO = | ||||||
11493 | dyn_cast<BinaryConditionalOperator>(E)) { | ||||||
11494 | Visit(BCO->getCond()); | ||||||
11495 | HandleValue(BCO->getFalseExpr()); | ||||||
11496 | return; | ||||||
11497 | } | ||||||
11498 | |||||||
11499 | if (OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(E)) { | ||||||
11500 | HandleValue(OVE->getSourceExpr()); | ||||||
11501 | return; | ||||||
11502 | } | ||||||
11503 | |||||||
11504 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) { | ||||||
11505 | if (BO->getOpcode() == BO_Comma) { | ||||||
11506 | Visit(BO->getLHS()); | ||||||
11507 | HandleValue(BO->getRHS()); | ||||||
11508 | return; | ||||||
11509 | } | ||||||
11510 | } | ||||||
11511 | |||||||
11512 | if (isa<MemberExpr>(E)) { | ||||||
11513 | if (isInitList) { | ||||||
11514 | if (CheckInitListMemberExpr(cast<MemberExpr>(E), | ||||||
11515 | false /*CheckReference*/)) | ||||||
11516 | return; | ||||||
11517 | } | ||||||
11518 | |||||||
11519 | Expr *Base = E->IgnoreParenImpCasts(); | ||||||
11520 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11521 | // Check for static member variables and don't warn on them. | ||||||
11522 | if (!isa<FieldDecl>(ME->getMemberDecl())) | ||||||
11523 | return; | ||||||
11524 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11525 | } | ||||||
11526 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) | ||||||
11527 | HandleDeclRefExpr(DRE); | ||||||
11528 | return; | ||||||
11529 | } | ||||||
11530 | |||||||
11531 | Visit(E); | ||||||
11532 | } | ||||||
11533 | |||||||
11534 | // Reference types not handled in HandleValue are handled here since all | ||||||
11535 | // uses of references are bad, not just r-value uses. | ||||||
11536 | void VisitDeclRefExpr(DeclRefExpr *E) { | ||||||
11537 | if (isReferenceType) | ||||||
11538 | HandleDeclRefExpr(E); | ||||||
11539 | } | ||||||
11540 | |||||||
11541 | void VisitImplicitCastExpr(ImplicitCastExpr *E) { | ||||||
11542 | if (E->getCastKind() == CK_LValueToRValue) { | ||||||
11543 | HandleValue(E->getSubExpr()); | ||||||
11544 | return; | ||||||
11545 | } | ||||||
11546 | |||||||
11547 | Inherited::VisitImplicitCastExpr(E); | ||||||
11548 | } | ||||||
11549 | |||||||
11550 | void VisitMemberExpr(MemberExpr *E) { | ||||||
11551 | if (isInitList) { | ||||||
11552 | if (CheckInitListMemberExpr(E, true /*CheckReference*/)) | ||||||
11553 | return; | ||||||
11554 | } | ||||||
11555 | |||||||
11556 | // Don't warn on arrays since they can be treated as pointers. | ||||||
11557 | if (E->getType()->canDecayToPointerType()) return; | ||||||
11558 | |||||||
11559 | // Warn when a non-static method call is followed by non-static member | ||||||
11560 | // field accesses, which is followed by a DeclRefExpr. | ||||||
11561 | CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(E->getMemberDecl()); | ||||||
11562 | bool Warn = (MD && !MD->isStatic()); | ||||||
11563 | Expr *Base = E->getBase()->IgnoreParenImpCasts(); | ||||||
11564 | while (MemberExpr *ME = dyn_cast<MemberExpr>(Base)) { | ||||||
11565 | if (!isa<FieldDecl>(ME->getMemberDecl())) | ||||||
11566 | Warn = false; | ||||||
11567 | Base = ME->getBase()->IgnoreParenImpCasts(); | ||||||
11568 | } | ||||||
11569 | |||||||
11570 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(Base)) { | ||||||
11571 | if (Warn) | ||||||
11572 | HandleDeclRefExpr(DRE); | ||||||
11573 | return; | ||||||
11574 | } | ||||||
11575 | |||||||
11576 | // The base of a MemberExpr is not a MemberExpr or a DeclRefExpr. | ||||||
11577 | // Visit that expression. | ||||||
11578 | Visit(Base); | ||||||
11579 | } | ||||||
11580 | |||||||
11581 | void VisitCXXOperatorCallExpr(CXXOperatorCallExpr *E) { | ||||||
11582 | Expr *Callee = E->getCallee(); | ||||||
11583 | |||||||
11584 | if (isa<UnresolvedLookupExpr>(Callee)) | ||||||
11585 | return Inherited::VisitCXXOperatorCallExpr(E); | ||||||
11586 | |||||||
11587 | Visit(Callee); | ||||||
11588 | for (auto Arg: E->arguments()) | ||||||
11589 | HandleValue(Arg->IgnoreParenImpCasts()); | ||||||
11590 | } | ||||||
11591 | |||||||
11592 | void VisitUnaryOperator(UnaryOperator *E) { | ||||||
11593 | // For POD record types, addresses of its own members are well-defined. | ||||||
11594 | if (E->getOpcode() == UO_AddrOf && isRecordType && | ||||||
11595 | isa<MemberExpr>(E->getSubExpr()->IgnoreParens())) { | ||||||
11596 | if (!isPODType) | ||||||
11597 | HandleValue(E->getSubExpr()); | ||||||
11598 | return; | ||||||
11599 | } | ||||||
11600 | |||||||
11601 | if (E->isIncrementDecrementOp()) { | ||||||
11602 | HandleValue(E->getSubExpr()); | ||||||
11603 | return; | ||||||
11604 | } | ||||||
11605 | |||||||
11606 | Inherited::VisitUnaryOperator(E); | ||||||
11607 | } | ||||||
11608 | |||||||
11609 | void VisitObjCMessageExpr(ObjCMessageExpr *E) {} | ||||||
11610 | |||||||
11611 | void VisitCXXConstructExpr(CXXConstructExpr *E) { | ||||||
11612 | if (E->getConstructor()->isCopyConstructor()) { | ||||||
11613 | Expr *ArgExpr = E->getArg(0); | ||||||
11614 | if (InitListExpr *ILE = dyn_cast<InitListExpr>(ArgExpr)) | ||||||
11615 | if (ILE->getNumInits() == 1) | ||||||
11616 | ArgExpr = ILE->getInit(0); | ||||||
11617 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(ArgExpr)) | ||||||
11618 | if (ICE->getCastKind() == CK_NoOp) | ||||||
11619 | ArgExpr = ICE->getSubExpr(); | ||||||
11620 | HandleValue(ArgExpr); | ||||||
11621 | return; | ||||||
11622 | } | ||||||
11623 | Inherited::VisitCXXConstructExpr(E); | ||||||
11624 | } | ||||||
11625 | |||||||
11626 | void VisitCallExpr(CallExpr *E) { | ||||||
11627 | // Treat std::move as a use. | ||||||
11628 | if (E->isCallToStdMove()) { | ||||||
11629 | HandleValue(E->getArg(0)); | ||||||
11630 | return; | ||||||
11631 | } | ||||||
11632 | |||||||
11633 | Inherited::VisitCallExpr(E); | ||||||
11634 | } | ||||||
11635 | |||||||
11636 | void VisitBinaryOperator(BinaryOperator *E) { | ||||||
11637 | if (E->isCompoundAssignmentOp()) { | ||||||
11638 | HandleValue(E->getLHS()); | ||||||
11639 | Visit(E->getRHS()); | ||||||
11640 | return; | ||||||
11641 | } | ||||||
11642 | |||||||
11643 | Inherited::VisitBinaryOperator(E); | ||||||
11644 | } | ||||||
11645 | |||||||
11646 | // A custom visitor for BinaryConditionalOperator is needed because the | ||||||
11647 | // regular visitor would check the condition and true expression separately | ||||||
11648 | // but both point to the same place giving duplicate diagnostics. | ||||||
11649 | void VisitBinaryConditionalOperator(BinaryConditionalOperator *E) { | ||||||
11650 | Visit(E->getCond()); | ||||||
11651 | Visit(E->getFalseExpr()); | ||||||
11652 | } | ||||||
11653 | |||||||
11654 | void HandleDeclRefExpr(DeclRefExpr *DRE) { | ||||||
11655 | Decl* ReferenceDecl = DRE->getDecl(); | ||||||
11656 | if (OrigDecl != ReferenceDecl) return; | ||||||
11657 | unsigned diag; | ||||||
11658 | if (isReferenceType) { | ||||||
11659 | diag = diag::warn_uninit_self_reference_in_reference_init; | ||||||
11660 | } else if (cast<VarDecl>(OrigDecl)->isStaticLocal()) { | ||||||
11661 | diag = diag::warn_static_self_reference_in_init; | ||||||
11662 | } else if (isa<TranslationUnitDecl>(OrigDecl->getDeclContext()) || | ||||||
11663 | isa<NamespaceDecl>(OrigDecl->getDeclContext()) || | ||||||
11664 | DRE->getDecl()->getType()->isRecordType()) { | ||||||
11665 | diag = diag::warn_uninit_self_reference_in_init; | ||||||
11666 | } else { | ||||||
11667 | // Local variables will be handled by the CFG analysis. | ||||||
11668 | return; | ||||||
11669 | } | ||||||
11670 | |||||||
11671 | S.DiagRuntimeBehavior(DRE->getBeginLoc(), DRE, | ||||||
11672 | S.PDiag(diag) | ||||||
11673 | << DRE->getDecl() << OrigDecl->getLocation() | ||||||
11674 | << DRE->getSourceRange()); | ||||||
11675 | } | ||||||
11676 | }; | ||||||
11677 | |||||||
11678 | /// CheckSelfReference - Warns if OrigDecl is used in expression E. | ||||||
11679 | static void CheckSelfReference(Sema &S, Decl* OrigDecl, Expr *E, | ||||||
11680 | bool DirectInit) { | ||||||
11681 | // Parameters arguments are occassionially constructed with itself, | ||||||
11682 | // for instance, in recursive functions. Skip them. | ||||||
11683 | if (isa<ParmVarDecl>(OrigDecl)) | ||||||
11684 | return; | ||||||
11685 | |||||||
11686 | E = E->IgnoreParens(); | ||||||
11687 | |||||||
11688 | // Skip checking T a = a where T is not a record or reference type. | ||||||
11689 | // Doing so is a way to silence uninitialized warnings. | ||||||
11690 | if (!DirectInit && !cast<VarDecl>(OrigDecl)->getType()->isRecordType()) | ||||||
11691 | if (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) | ||||||
11692 | if (ICE->getCastKind() == CK_LValueToRValue) | ||||||
11693 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr())) | ||||||
11694 | if (DRE->getDecl() == OrigDecl) | ||||||
11695 | return; | ||||||
11696 | |||||||
11697 | SelfReferenceChecker(S, OrigDecl).CheckExpr(E); | ||||||
11698 | } | ||||||
11699 | } // end anonymous namespace | ||||||
11700 | |||||||
11701 | namespace { | ||||||
11702 | // Simple wrapper to add the name of a variable or (if no variable is | ||||||
11703 | // available) a DeclarationName into a diagnostic. | ||||||
11704 | struct VarDeclOrName { | ||||||
11705 | VarDecl *VDecl; | ||||||
11706 | DeclarationName Name; | ||||||
11707 | |||||||
11708 | friend const Sema::SemaDiagnosticBuilder & | ||||||
11709 | operator<<(const Sema::SemaDiagnosticBuilder &Diag, VarDeclOrName VN) { | ||||||
11710 | return VN.VDecl ? Diag << VN.VDecl : Diag << VN.Name; | ||||||
11711 | } | ||||||
11712 | }; | ||||||
11713 | } // end anonymous namespace | ||||||
11714 | |||||||
11715 | QualType Sema::deduceVarTypeFromInitializer(VarDecl *VDecl, | ||||||
11716 | DeclarationName Name, QualType Type, | ||||||
11717 | TypeSourceInfo *TSI, | ||||||
11718 | SourceRange Range, bool DirectInit, | ||||||
11719 | Expr *Init) { | ||||||
11720 | bool IsInitCapture = !VDecl; | ||||||
11721 | assert((!VDecl || !VDecl->isInitCapture()) &&(static_cast <bool> ((!VDecl || !VDecl->isInitCapture ()) && "init captures are expected to be deduced prior to initialization" ) ? void (0) : __assert_fail ("(!VDecl || !VDecl->isInitCapture()) && \"init captures are expected to be deduced prior to initialization\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11722, __extension__ __PRETTY_FUNCTION__)) | ||||||
11722 | "init captures are expected to be deduced prior to initialization")(static_cast <bool> ((!VDecl || !VDecl->isInitCapture ()) && "init captures are expected to be deduced prior to initialization" ) ? void (0) : __assert_fail ("(!VDecl || !VDecl->isInitCapture()) && \"init captures are expected to be deduced prior to initialization\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11722, __extension__ __PRETTY_FUNCTION__)); | ||||||
11723 | |||||||
11724 | VarDeclOrName VN{VDecl, Name}; | ||||||
11725 | |||||||
11726 | DeducedType *Deduced = Type->getContainedDeducedType(); | ||||||
11727 | assert(Deduced && "deduceVarTypeFromInitializer for non-deduced type")(static_cast <bool> (Deduced && "deduceVarTypeFromInitializer for non-deduced type" ) ? void (0) : __assert_fail ("Deduced && \"deduceVarTypeFromInitializer for non-deduced type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11727, __extension__ __PRETTY_FUNCTION__)); | ||||||
11728 | |||||||
11729 | // C++11 [dcl.spec.auto]p3 | ||||||
11730 | if (!Init) { | ||||||
11731 | assert(VDecl && "no init for init capture deduction?")(static_cast <bool> (VDecl && "no init for init capture deduction?" ) ? void (0) : __assert_fail ("VDecl && \"no init for init capture deduction?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11731, __extension__ __PRETTY_FUNCTION__)); | ||||||
11732 | |||||||
11733 | // Except for class argument deduction, and then for an initializing | ||||||
11734 | // declaration only, i.e. no static at class scope or extern. | ||||||
11735 | if (!isa<DeducedTemplateSpecializationType>(Deduced) || | ||||||
11736 | VDecl->hasExternalStorage() || | ||||||
11737 | VDecl->isStaticDataMember()) { | ||||||
11738 | Diag(VDecl->getLocation(), diag::err_auto_var_requires_init) | ||||||
11739 | << VDecl->getDeclName() << Type; | ||||||
11740 | return QualType(); | ||||||
11741 | } | ||||||
11742 | } | ||||||
11743 | |||||||
11744 | ArrayRef<Expr*> DeduceInits; | ||||||
11745 | if (Init) | ||||||
11746 | DeduceInits = Init; | ||||||
11747 | |||||||
11748 | if (DirectInit) { | ||||||
11749 | if (auto *PL = dyn_cast_or_null<ParenListExpr>(Init)) | ||||||
11750 | DeduceInits = PL->exprs(); | ||||||
11751 | } | ||||||
11752 | |||||||
11753 | if (isa<DeducedTemplateSpecializationType>(Deduced)) { | ||||||
11754 | assert(VDecl && "non-auto type for init capture deduction?")(static_cast <bool> (VDecl && "non-auto type for init capture deduction?" ) ? void (0) : __assert_fail ("VDecl && \"non-auto type for init capture deduction?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11754, __extension__ __PRETTY_FUNCTION__)); | ||||||
11755 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); | ||||||
11756 | InitializationKind Kind = InitializationKind::CreateForInit( | ||||||
11757 | VDecl->getLocation(), DirectInit, Init); | ||||||
11758 | // FIXME: Initialization should not be taking a mutable list of inits. | ||||||
11759 | SmallVector<Expr*, 8> InitsCopy(DeduceInits.begin(), DeduceInits.end()); | ||||||
11760 | return DeduceTemplateSpecializationFromInitializer(TSI, Entity, Kind, | ||||||
11761 | InitsCopy); | ||||||
11762 | } | ||||||
11763 | |||||||
11764 | if (DirectInit) { | ||||||
11765 | if (auto *IL = dyn_cast<InitListExpr>(Init)) | ||||||
11766 | DeduceInits = IL->inits(); | ||||||
11767 | } | ||||||
11768 | |||||||
11769 | // Deduction only works if we have exactly one source expression. | ||||||
11770 | if (DeduceInits.empty()) { | ||||||
11771 | // It isn't possible to write this directly, but it is possible to | ||||||
11772 | // end up in this situation with "auto x(some_pack...);" | ||||||
11773 | Diag(Init->getBeginLoc(), IsInitCapture | ||||||
11774 | ? diag::err_init_capture_no_expression | ||||||
11775 | : diag::err_auto_var_init_no_expression) | ||||||
11776 | << VN << Type << Range; | ||||||
11777 | return QualType(); | ||||||
11778 | } | ||||||
11779 | |||||||
11780 | if (DeduceInits.size() > 1) { | ||||||
11781 | Diag(DeduceInits[1]->getBeginLoc(), | ||||||
11782 | IsInitCapture ? diag::err_init_capture_multiple_expressions | ||||||
11783 | : diag::err_auto_var_init_multiple_expressions) | ||||||
11784 | << VN << Type << Range; | ||||||
11785 | return QualType(); | ||||||
11786 | } | ||||||
11787 | |||||||
11788 | Expr *DeduceInit = DeduceInits[0]; | ||||||
11789 | if (DirectInit && isa<InitListExpr>(DeduceInit)) { | ||||||
11790 | Diag(Init->getBeginLoc(), IsInitCapture | ||||||
11791 | ? diag::err_init_capture_paren_braces | ||||||
11792 | : diag::err_auto_var_init_paren_braces) | ||||||
11793 | << isa<InitListExpr>(Init) << VN << Type << Range; | ||||||
11794 | return QualType(); | ||||||
11795 | } | ||||||
11796 | |||||||
11797 | // Expressions default to 'id' when we're in a debugger. | ||||||
11798 | bool DefaultedAnyToId = false; | ||||||
11799 | if (getLangOpts().DebuggerCastResultToId && | ||||||
11800 | Init->getType() == Context.UnknownAnyTy && !IsInitCapture) { | ||||||
11801 | ExprResult Result = forceUnknownAnyToType(Init, Context.getObjCIdType()); | ||||||
11802 | if (Result.isInvalid()) { | ||||||
11803 | return QualType(); | ||||||
11804 | } | ||||||
11805 | Init = Result.get(); | ||||||
11806 | DefaultedAnyToId = true; | ||||||
11807 | } | ||||||
11808 | |||||||
11809 | // C++ [dcl.decomp]p1: | ||||||
11810 | // If the assignment-expression [...] has array type A and no ref-qualifier | ||||||
11811 | // is present, e has type cv A | ||||||
11812 | if (VDecl && isa<DecompositionDecl>(VDecl) && | ||||||
11813 | Context.hasSameUnqualifiedType(Type, Context.getAutoDeductType()) && | ||||||
11814 | DeduceInit->getType()->isConstantArrayType()) | ||||||
11815 | return Context.getQualifiedType(DeduceInit->getType(), | ||||||
11816 | Type.getQualifiers()); | ||||||
11817 | |||||||
11818 | QualType DeducedType; | ||||||
11819 | if (DeduceAutoType(TSI, DeduceInit, DeducedType) == DAR_Failed) { | ||||||
11820 | if (!IsInitCapture) | ||||||
11821 | DiagnoseAutoDeductionFailure(VDecl, DeduceInit); | ||||||
11822 | else if (isa<InitListExpr>(Init)) | ||||||
11823 | Diag(Range.getBegin(), | ||||||
11824 | diag::err_init_capture_deduction_failure_from_init_list) | ||||||
11825 | << VN | ||||||
11826 | << (DeduceInit->getType().isNull() ? TSI->getType() | ||||||
11827 | : DeduceInit->getType()) | ||||||
11828 | << DeduceInit->getSourceRange(); | ||||||
11829 | else | ||||||
11830 | Diag(Range.getBegin(), diag::err_init_capture_deduction_failure) | ||||||
11831 | << VN << TSI->getType() | ||||||
11832 | << (DeduceInit->getType().isNull() ? TSI->getType() | ||||||
11833 | : DeduceInit->getType()) | ||||||
11834 | << DeduceInit->getSourceRange(); | ||||||
11835 | } | ||||||
11836 | |||||||
11837 | // Warn if we deduced 'id'. 'auto' usually implies type-safety, but using | ||||||
11838 | // 'id' instead of a specific object type prevents most of our usual | ||||||
11839 | // checks. | ||||||
11840 | // We only want to warn outside of template instantiations, though: | ||||||
11841 | // inside a template, the 'id' could have come from a parameter. | ||||||
11842 | if (!inTemplateInstantiation() && !DefaultedAnyToId && !IsInitCapture && | ||||||
11843 | !DeducedType.isNull() && DeducedType->isObjCIdType()) { | ||||||
11844 | SourceLocation Loc = TSI->getTypeLoc().getBeginLoc(); | ||||||
11845 | Diag(Loc, diag::warn_auto_var_is_id) << VN << Range; | ||||||
11846 | } | ||||||
11847 | |||||||
11848 | return DeducedType; | ||||||
11849 | } | ||||||
11850 | |||||||
11851 | bool Sema::DeduceVariableDeclarationType(VarDecl *VDecl, bool DirectInit, | ||||||
11852 | Expr *Init) { | ||||||
11853 | assert(!Init || !Init->containsErrors())(static_cast <bool> (!Init || !Init->containsErrors( )) ? void (0) : __assert_fail ("!Init || !Init->containsErrors()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11853, __extension__ __PRETTY_FUNCTION__)); | ||||||
11854 | QualType DeducedType = deduceVarTypeFromInitializer( | ||||||
11855 | VDecl, VDecl->getDeclName(), VDecl->getType(), VDecl->getTypeSourceInfo(), | ||||||
11856 | VDecl->getSourceRange(), DirectInit, Init); | ||||||
11857 | if (DeducedType.isNull()) { | ||||||
11858 | VDecl->setInvalidDecl(); | ||||||
11859 | return true; | ||||||
11860 | } | ||||||
11861 | |||||||
11862 | VDecl->setType(DeducedType); | ||||||
11863 | assert(VDecl->isLinkageValid())(static_cast <bool> (VDecl->isLinkageValid()) ? void (0) : __assert_fail ("VDecl->isLinkageValid()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11863, __extension__ __PRETTY_FUNCTION__)); | ||||||
11864 | |||||||
11865 | // In ARC, infer lifetime. | ||||||
11866 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(VDecl)) | ||||||
11867 | VDecl->setInvalidDecl(); | ||||||
11868 | |||||||
11869 | if (getLangOpts().OpenCL) | ||||||
11870 | deduceOpenCLAddressSpace(VDecl); | ||||||
11871 | |||||||
11872 | // If this is a redeclaration, check that the type we just deduced matches | ||||||
11873 | // the previously declared type. | ||||||
11874 | if (VarDecl *Old = VDecl->getPreviousDecl()) { | ||||||
11875 | // We never need to merge the type, because we cannot form an incomplete | ||||||
11876 | // array of auto, nor deduce such a type. | ||||||
11877 | MergeVarDeclTypes(VDecl, Old, /*MergeTypeWithPrevious*/ false); | ||||||
11878 | } | ||||||
11879 | |||||||
11880 | // Check the deduced type is valid for a variable declaration. | ||||||
11881 | CheckVariableDeclarationType(VDecl); | ||||||
11882 | return VDecl->isInvalidDecl(); | ||||||
11883 | } | ||||||
11884 | |||||||
11885 | void Sema::checkNonTrivialCUnionInInitializer(const Expr *Init, | ||||||
11886 | SourceLocation Loc) { | ||||||
11887 | if (auto *EWC = dyn_cast<ExprWithCleanups>(Init)) | ||||||
11888 | Init = EWC->getSubExpr(); | ||||||
11889 | |||||||
11890 | if (auto *CE = dyn_cast<ConstantExpr>(Init)) | ||||||
11891 | Init = CE->getSubExpr(); | ||||||
11892 | |||||||
11893 | QualType InitType = Init->getType(); | ||||||
11894 | assert((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() ||(static_cast <bool> ((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? void (0) : __assert_fail ("(InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C struct\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11896, __extension__ __PRETTY_FUNCTION__)) | ||||||
11895 | InitType.hasNonTrivialToPrimitiveCopyCUnion()) &&(static_cast <bool> ((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? void (0) : __assert_fail ("(InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C struct\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11896, __extension__ __PRETTY_FUNCTION__)) | ||||||
11896 | "shouldn't be called if type doesn't have a non-trivial C struct")(static_cast <bool> ((InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && "shouldn't be called if type doesn't have a non-trivial C struct" ) ? void (0) : __assert_fail ("(InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || InitType.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C struct\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 11896, __extension__ __PRETTY_FUNCTION__)); | ||||||
11897 | if (auto *ILE = dyn_cast<InitListExpr>(Init)) { | ||||||
11898 | for (auto I : ILE->inits()) { | ||||||
11899 | if (!I->getType().hasNonTrivialToPrimitiveDefaultInitializeCUnion() && | ||||||
11900 | !I->getType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
11901 | continue; | ||||||
11902 | SourceLocation SL = I->getExprLoc(); | ||||||
11903 | checkNonTrivialCUnionInInitializer(I, SL.isValid() ? SL : Loc); | ||||||
11904 | } | ||||||
11905 | return; | ||||||
11906 | } | ||||||
11907 | |||||||
11908 | if (isa<ImplicitValueInitExpr>(Init)) { | ||||||
11909 | if (InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
11910 | checkNonTrivialCUnion(InitType, Loc, NTCUC_DefaultInitializedObject, | ||||||
11911 | NTCUK_Init); | ||||||
11912 | } else { | ||||||
11913 | // Assume all other explicit initializers involving copying some existing | ||||||
11914 | // object. | ||||||
11915 | // TODO: ignore any explicit initializers where we can guarantee | ||||||
11916 | // copy-elision. | ||||||
11917 | if (InitType.hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
11918 | checkNonTrivialCUnion(InitType, Loc, NTCUC_CopyInit, NTCUK_Copy); | ||||||
11919 | } | ||||||
11920 | } | ||||||
11921 | |||||||
11922 | namespace { | ||||||
11923 | |||||||
11924 | bool shouldIgnoreForRecordTriviality(const FieldDecl *FD) { | ||||||
11925 | // Ignore unavailable fields. A field can be marked as unavailable explicitly | ||||||
11926 | // in the source code or implicitly by the compiler if it is in a union | ||||||
11927 | // defined in a system header and has non-trivial ObjC ownership | ||||||
11928 | // qualifications. We don't want those fields to participate in determining | ||||||
11929 | // whether the containing union is non-trivial. | ||||||
11930 | return FD->hasAttr<UnavailableAttr>(); | ||||||
11931 | } | ||||||
11932 | |||||||
11933 | struct DiagNonTrivalCUnionDefaultInitializeVisitor | ||||||
11934 | : DefaultInitializedTypeVisitor<DiagNonTrivalCUnionDefaultInitializeVisitor, | ||||||
11935 | void> { | ||||||
11936 | using Super = | ||||||
11937 | DefaultInitializedTypeVisitor<DiagNonTrivalCUnionDefaultInitializeVisitor, | ||||||
11938 | void>; | ||||||
11939 | |||||||
11940 | DiagNonTrivalCUnionDefaultInitializeVisitor( | ||||||
11941 | QualType OrigTy, SourceLocation OrigLoc, | ||||||
11942 | Sema::NonTrivialCUnionContext UseContext, Sema &S) | ||||||
11943 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
11944 | |||||||
11945 | void visitWithKind(QualType::PrimitiveDefaultInitializeKind PDIK, QualType QT, | ||||||
11946 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11947 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
11948 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
11949 | InNonTrivialUnion); | ||||||
11950 | return Super::visitWithKind(PDIK, QT, FD, InNonTrivialUnion); | ||||||
11951 | } | ||||||
11952 | |||||||
11953 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
11954 | bool InNonTrivialUnion) { | ||||||
11955 | if (InNonTrivialUnion) | ||||||
11956 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11957 | << 1 << 0 << QT << FD->getName(); | ||||||
11958 | } | ||||||
11959 | |||||||
11960 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11961 | if (InNonTrivialUnion) | ||||||
11962 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11963 | << 1 << 0 << QT << FD->getName(); | ||||||
11964 | } | ||||||
11965 | |||||||
11966 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
11967 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
11968 | if (RD->isUnion()) { | ||||||
11969 | if (OrigLoc.isValid()) { | ||||||
11970 | bool IsUnion = false; | ||||||
11971 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
11972 | IsUnion = OrigRD->isUnion(); | ||||||
11973 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
11974 | << 0 << OrigTy << IsUnion << UseContext; | ||||||
11975 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
11976 | OrigLoc = SourceLocation(); | ||||||
11977 | } | ||||||
11978 | InNonTrivialUnion = true; | ||||||
11979 | } | ||||||
11980 | |||||||
11981 | if (InNonTrivialUnion) | ||||||
11982 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
11983 | << 0 << 0 << QT.getUnqualifiedType() << ""; | ||||||
11984 | |||||||
11985 | for (const FieldDecl *FD : RD->fields()) | ||||||
11986 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
11987 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
11988 | } | ||||||
11989 | |||||||
11990 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
11991 | |||||||
11992 | // The non-trivial C union type or the struct/union type that contains a | ||||||
11993 | // non-trivial C union. | ||||||
11994 | QualType OrigTy; | ||||||
11995 | SourceLocation OrigLoc; | ||||||
11996 | Sema::NonTrivialCUnionContext UseContext; | ||||||
11997 | Sema &S; | ||||||
11998 | }; | ||||||
11999 | |||||||
12000 | struct DiagNonTrivalCUnionDestructedTypeVisitor | ||||||
12001 | : DestructedTypeVisitor<DiagNonTrivalCUnionDestructedTypeVisitor, void> { | ||||||
12002 | using Super = | ||||||
12003 | DestructedTypeVisitor<DiagNonTrivalCUnionDestructedTypeVisitor, void>; | ||||||
12004 | |||||||
12005 | DiagNonTrivalCUnionDestructedTypeVisitor( | ||||||
12006 | QualType OrigTy, SourceLocation OrigLoc, | ||||||
12007 | Sema::NonTrivialCUnionContext UseContext, Sema &S) | ||||||
12008 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
12009 | |||||||
12010 | void visitWithKind(QualType::DestructionKind DK, QualType QT, | ||||||
12011 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12012 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
12013 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
12014 | InNonTrivialUnion); | ||||||
12015 | return Super::visitWithKind(DK, QT, FD, InNonTrivialUnion); | ||||||
12016 | } | ||||||
12017 | |||||||
12018 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
12019 | bool InNonTrivialUnion) { | ||||||
12020 | if (InNonTrivialUnion) | ||||||
12021 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12022 | << 1 << 1 << QT << FD->getName(); | ||||||
12023 | } | ||||||
12024 | |||||||
12025 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12026 | if (InNonTrivialUnion) | ||||||
12027 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12028 | << 1 << 1 << QT << FD->getName(); | ||||||
12029 | } | ||||||
12030 | |||||||
12031 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12032 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
12033 | if (RD->isUnion()) { | ||||||
12034 | if (OrigLoc.isValid()) { | ||||||
12035 | bool IsUnion = false; | ||||||
12036 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
12037 | IsUnion = OrigRD->isUnion(); | ||||||
12038 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
12039 | << 1 << OrigTy << IsUnion << UseContext; | ||||||
12040 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
12041 | OrigLoc = SourceLocation(); | ||||||
12042 | } | ||||||
12043 | InNonTrivialUnion = true; | ||||||
12044 | } | ||||||
12045 | |||||||
12046 | if (InNonTrivialUnion) | ||||||
12047 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12048 | << 0 << 1 << QT.getUnqualifiedType() << ""; | ||||||
12049 | |||||||
12050 | for (const FieldDecl *FD : RD->fields()) | ||||||
12051 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
12052 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
12053 | } | ||||||
12054 | |||||||
12055 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
12056 | void visitCXXDestructor(QualType QT, const FieldDecl *FD, | ||||||
12057 | bool InNonTrivialUnion) {} | ||||||
12058 | |||||||
12059 | // The non-trivial C union type or the struct/union type that contains a | ||||||
12060 | // non-trivial C union. | ||||||
12061 | QualType OrigTy; | ||||||
12062 | SourceLocation OrigLoc; | ||||||
12063 | Sema::NonTrivialCUnionContext UseContext; | ||||||
12064 | Sema &S; | ||||||
12065 | }; | ||||||
12066 | |||||||
12067 | struct DiagNonTrivalCUnionCopyVisitor | ||||||
12068 | : CopiedTypeVisitor<DiagNonTrivalCUnionCopyVisitor, false, void> { | ||||||
12069 | using Super = CopiedTypeVisitor<DiagNonTrivalCUnionCopyVisitor, false, void>; | ||||||
12070 | |||||||
12071 | DiagNonTrivalCUnionCopyVisitor(QualType OrigTy, SourceLocation OrigLoc, | ||||||
12072 | Sema::NonTrivialCUnionContext UseContext, | ||||||
12073 | Sema &S) | ||||||
12074 | : OrigTy(OrigTy), OrigLoc(OrigLoc), UseContext(UseContext), S(S) {} | ||||||
12075 | |||||||
12076 | void visitWithKind(QualType::PrimitiveCopyKind PCK, QualType QT, | ||||||
12077 | const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12078 | if (const auto *AT = S.Context.getAsArrayType(QT)) | ||||||
12079 | return this->asDerived().visit(S.Context.getBaseElementType(AT), FD, | ||||||
12080 | InNonTrivialUnion); | ||||||
12081 | return Super::visitWithKind(PCK, QT, FD, InNonTrivialUnion); | ||||||
12082 | } | ||||||
12083 | |||||||
12084 | void visitARCStrong(QualType QT, const FieldDecl *FD, | ||||||
12085 | bool InNonTrivialUnion) { | ||||||
12086 | if (InNonTrivialUnion) | ||||||
12087 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12088 | << 1 << 2 << QT << FD->getName(); | ||||||
12089 | } | ||||||
12090 | |||||||
12091 | void visitARCWeak(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12092 | if (InNonTrivialUnion) | ||||||
12093 | S.Diag(FD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12094 | << 1 << 2 << QT << FD->getName(); | ||||||
12095 | } | ||||||
12096 | |||||||
12097 | void visitStruct(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) { | ||||||
12098 | const RecordDecl *RD = QT->castAs<RecordType>()->getDecl(); | ||||||
12099 | if (RD->isUnion()) { | ||||||
12100 | if (OrigLoc.isValid()) { | ||||||
12101 | bool IsUnion = false; | ||||||
12102 | if (auto *OrigRD = OrigTy->getAsRecordDecl()) | ||||||
12103 | IsUnion = OrigRD->isUnion(); | ||||||
12104 | S.Diag(OrigLoc, diag::err_non_trivial_c_union_in_invalid_context) | ||||||
12105 | << 2 << OrigTy << IsUnion << UseContext; | ||||||
12106 | // Reset OrigLoc so that this diagnostic is emitted only once. | ||||||
12107 | OrigLoc = SourceLocation(); | ||||||
12108 | } | ||||||
12109 | InNonTrivialUnion = true; | ||||||
12110 | } | ||||||
12111 | |||||||
12112 | if (InNonTrivialUnion) | ||||||
12113 | S.Diag(RD->getLocation(), diag::note_non_trivial_c_union) | ||||||
12114 | << 0 << 2 << QT.getUnqualifiedType() << ""; | ||||||
12115 | |||||||
12116 | for (const FieldDecl *FD : RD->fields()) | ||||||
12117 | if (!shouldIgnoreForRecordTriviality(FD)) | ||||||
12118 | asDerived().visit(FD->getType(), FD, InNonTrivialUnion); | ||||||
12119 | } | ||||||
12120 | |||||||
12121 | void preVisit(QualType::PrimitiveCopyKind PCK, QualType QT, | ||||||
12122 | const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
12123 | void visitTrivial(QualType QT, const FieldDecl *FD, bool InNonTrivialUnion) {} | ||||||
12124 | void visitVolatileTrivial(QualType QT, const FieldDecl *FD, | ||||||
12125 | bool InNonTrivialUnion) {} | ||||||
12126 | |||||||
12127 | // The non-trivial C union type or the struct/union type that contains a | ||||||
12128 | // non-trivial C union. | ||||||
12129 | QualType OrigTy; | ||||||
12130 | SourceLocation OrigLoc; | ||||||
12131 | Sema::NonTrivialCUnionContext UseContext; | ||||||
12132 | Sema &S; | ||||||
12133 | }; | ||||||
12134 | |||||||
12135 | } // namespace | ||||||
12136 | |||||||
12137 | void Sema::checkNonTrivialCUnion(QualType QT, SourceLocation Loc, | ||||||
12138 | NonTrivialCUnionContext UseContext, | ||||||
12139 | unsigned NonTrivialKind) { | ||||||
12140 | assert((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() ||(static_cast <bool> ((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? void (0) : __assert_fail ("(QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C union\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 12143, __extension__ __PRETTY_FUNCTION__)) | ||||||
12141 | QT.hasNonTrivialToPrimitiveDestructCUnion() ||(static_cast <bool> ((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? void (0) : __assert_fail ("(QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C union\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 12143, __extension__ __PRETTY_FUNCTION__)) | ||||||
12142 | QT.hasNonTrivialToPrimitiveCopyCUnion()) &&(static_cast <bool> ((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? void (0) : __assert_fail ("(QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C union\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 12143, __extension__ __PRETTY_FUNCTION__)) | ||||||
12143 | "shouldn't be called if type doesn't have a non-trivial C union")(static_cast <bool> ((QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion () || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion ()) && "shouldn't be called if type doesn't have a non-trivial C union" ) ? void (0) : __assert_fail ("(QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || QT.hasNonTrivialToPrimitiveDestructCUnion() || QT.hasNonTrivialToPrimitiveCopyCUnion()) && \"shouldn't be called if type doesn't have a non-trivial C union\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 12143, __extension__ __PRETTY_FUNCTION__)); | ||||||
12144 | |||||||
12145 | if ((NonTrivialKind & NTCUK_Init) && | ||||||
12146 | QT.hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
12147 | DiagNonTrivalCUnionDefaultInitializeVisitor(QT, Loc, UseContext, *this) | ||||||
12148 | .visit(QT, nullptr, false); | ||||||
12149 | if ((NonTrivialKind & NTCUK_Destruct) && | ||||||
12150 | QT.hasNonTrivialToPrimitiveDestructCUnion()) | ||||||
12151 | DiagNonTrivalCUnionDestructedTypeVisitor(QT, Loc, UseContext, *this) | ||||||
12152 | .visit(QT, nullptr, false); | ||||||
12153 | if ((NonTrivialKind & NTCUK_Copy) && QT.hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
12154 | DiagNonTrivalCUnionCopyVisitor(QT, Loc, UseContext, *this) | ||||||
12155 | .visit(QT, nullptr, false); | ||||||
12156 | } | ||||||
12157 | |||||||
12158 | /// AddInitializerToDecl - Adds the initializer Init to the | ||||||
12159 | /// declaration dcl. If DirectInit is true, this is C++ direct | ||||||
12160 | /// initialization rather than copy initialization. | ||||||
12161 | void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init, bool DirectInit) { | ||||||
12162 | // If there is no declaration, there was an error parsing it. Just ignore | ||||||
12163 | // the initializer. | ||||||
12164 | if (!RealDecl || RealDecl->isInvalidDecl()) { | ||||||
12165 | CorrectDelayedTyposInExpr(Init, dyn_cast_or_null<VarDecl>(RealDecl)); | ||||||
12166 | return; | ||||||
12167 | } | ||||||
12168 | |||||||
12169 | if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(RealDecl)) { | ||||||
12170 | // Pure-specifiers are handled in ActOnPureSpecifier. | ||||||
12171 | Diag(Method->getLocation(), diag::err_member_function_initialization) | ||||||
12172 | << Method->getDeclName() << Init->getSourceRange(); | ||||||
12173 | Method->setInvalidDecl(); | ||||||
12174 | return; | ||||||
12175 | } | ||||||
12176 | |||||||
12177 | VarDecl *VDecl = dyn_cast<VarDecl>(RealDecl); | ||||||
12178 | if (!VDecl) { | ||||||
12179 | assert(!isa<FieldDecl>(RealDecl) && "field init shouldn't get here")(static_cast <bool> (!isa<FieldDecl>(RealDecl) && "field init shouldn't get here") ? void (0) : __assert_fail ( "!isa<FieldDecl>(RealDecl) && \"field init shouldn't get here\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 12179, __extension__ __PRETTY_FUNCTION__)); | ||||||
12180 | Diag(RealDecl->getLocation(), diag::err_illegal_initializer); | ||||||
12181 | RealDecl->setInvalidDecl(); | ||||||
12182 | return; | ||||||
12183 | } | ||||||
12184 | |||||||
12185 | // C++11 [decl.spec.auto]p6. Deduce the type which 'auto' stands in for. | ||||||
12186 | if (VDecl->getType()->isUndeducedType()) { | ||||||
12187 | // Attempt typo correction early so that the type of the init expression can | ||||||
12188 | // be deduced based on the chosen correction if the original init contains a | ||||||
12189 | // TypoExpr. | ||||||
12190 | ExprResult Res = CorrectDelayedTyposInExpr(Init, VDecl); | ||||||
12191 | if (!Res.isUsable()) { | ||||||
12192 | // There are unresolved typos in Init, just drop them. | ||||||
12193 | // FIXME: improve the recovery strategy to preserve the Init. | ||||||
12194 | RealDecl->setInvalidDecl(); | ||||||
12195 | return; | ||||||
12196 | } | ||||||
12197 | if (Res.get()->containsErrors()) { | ||||||
12198 | // Invalidate the decl as we don't know the type for recovery-expr yet. | ||||||
12199 | RealDecl->setInvalidDecl(); | ||||||
12200 | VDecl->setInit(Res.get()); | ||||||
12201 | return; | ||||||
12202 | } | ||||||
12203 | Init = Res.get(); | ||||||
12204 | |||||||
12205 | if (DeduceVariableDeclarationType(VDecl, DirectInit, Init)) | ||||||
12206 | return; | ||||||
12207 | } | ||||||
12208 | |||||||
12209 | // dllimport cannot be used on variable definitions. | ||||||
12210 | if (VDecl->hasAttr<DLLImportAttr>() && !VDecl->isStaticDataMember()) { | ||||||
12211 | Diag(VDecl->getLocation(), diag::err_attribute_dllimport_data_definition); | ||||||
12212 | VDecl->setInvalidDecl(); | ||||||
12213 | return; | ||||||
12214 | } | ||||||
12215 | |||||||
12216 | if (VDecl->isLocalVarDecl() && VDecl->hasExternalStorage()) { | ||||||
12217 | // C99 6.7.8p5. C++ has no such restriction, but that is a defect. | ||||||
12218 | Diag(VDecl->getLocation(), diag::err_block_extern_cant_init); | ||||||
12219 | VDecl->setInvalidDecl(); | ||||||
12220 | return; | ||||||
12221 | } | ||||||
12222 | |||||||
12223 | if (!VDecl->getType()->isDependentType()) { | ||||||
12224 | // A definition must end up with a complete type, which means it must be | ||||||
12225 | // complete with the restriction that an array type might be completed by | ||||||
12226 | // the initializer; note that later code assumes this restriction. | ||||||
12227 | QualType BaseDeclType = VDecl->getType(); | ||||||
12228 | if (const ArrayType *Array = Context.getAsIncompleteArrayType(BaseDeclType)) | ||||||
12229 | BaseDeclType = Array->getElementType(); | ||||||
12230 | if (RequireCompleteType(VDecl->getLocation(), BaseDeclType, | ||||||
12231 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12232 | RealDecl->setInvalidDecl(); | ||||||
12233 | return; | ||||||
12234 | } | ||||||
12235 | |||||||
12236 | // The variable can not have an abstract class type. | ||||||
12237 | if (RequireNonAbstractType(VDecl->getLocation(), VDecl->getType(), | ||||||
12238 | diag::err_abstract_type_in_decl, | ||||||
12239 | AbstractVariableType)) | ||||||
12240 | VDecl->setInvalidDecl(); | ||||||
12241 | } | ||||||
12242 | |||||||
12243 | // If adding the initializer will turn this declaration into a definition, | ||||||
12244 | // and we already have a definition for this variable, diagnose or otherwise | ||||||
12245 | // handle the situation. | ||||||
12246 | if (VarDecl *Def = VDecl->getDefinition()) | ||||||
12247 | if (Def != VDecl && | ||||||
12248 | (!VDecl->isStaticDataMember() || VDecl->isOutOfLine()) && | ||||||
12249 | !VDecl->isThisDeclarationADemotedDefinition() && | ||||||
12250 | checkVarDeclRedefinition(Def, VDecl)) | ||||||
12251 | return; | ||||||
12252 | |||||||
12253 | if (getLangOpts().CPlusPlus) { | ||||||
12254 | // C++ [class.static.data]p4 | ||||||
12255 | // If a static data member is of const integral or const | ||||||
12256 | // enumeration type, its declaration in the class definition can | ||||||
12257 | // specify a constant-initializer which shall be an integral | ||||||
12258 | // constant expression (5.19). In that case, the member can appear | ||||||
12259 | // in integral constant expressions. The member shall still be | ||||||
12260 | // defined in a namespace scope if it is used in the program and the | ||||||
12261 | // namespace scope definition shall not contain an initializer. | ||||||
12262 | // | ||||||
12263 | // We already performed a redefinition check above, but for static | ||||||
12264 | // data members we also need to check whether there was an in-class | ||||||
12265 | // declaration with an initializer. | ||||||
12266 | if (VDecl->isStaticDataMember() && VDecl->getCanonicalDecl()->hasInit()) { | ||||||
12267 | Diag(Init->getExprLoc(), diag::err_static_data_member_reinitialization) | ||||||
12268 | << VDecl->getDeclName(); | ||||||
12269 | Diag(VDecl->getCanonicalDecl()->getInit()->getExprLoc(), | ||||||
12270 | diag::note_previous_initializer) | ||||||
12271 | << 0; | ||||||
12272 | return; | ||||||
12273 | } | ||||||
12274 | |||||||
12275 | if (VDecl->hasLocalStorage()) | ||||||
12276 | setFunctionHasBranchProtectedScope(); | ||||||
12277 | |||||||
12278 | if (DiagnoseUnexpandedParameterPack(Init, UPPC_Initializer)) { | ||||||
12279 | VDecl->setInvalidDecl(); | ||||||
12280 | return; | ||||||
12281 | } | ||||||
12282 | } | ||||||
12283 | |||||||
12284 | // OpenCL 1.1 6.5.2: "Variables allocated in the __local address space inside | ||||||
12285 | // a kernel function cannot be initialized." | ||||||
12286 | if (VDecl->getType().getAddressSpace() == LangAS::opencl_local) { | ||||||
12287 | Diag(VDecl->getLocation(), diag::err_local_cant_init); | ||||||
12288 | VDecl->setInvalidDecl(); | ||||||
12289 | return; | ||||||
12290 | } | ||||||
12291 | |||||||
12292 | // The LoaderUninitialized attribute acts as a definition (of undef). | ||||||
12293 | if (VDecl->hasAttr<LoaderUninitializedAttr>()) { | ||||||
12294 | Diag(VDecl->getLocation(), diag::err_loader_uninitialized_cant_init); | ||||||
12295 | VDecl->setInvalidDecl(); | ||||||
12296 | return; | ||||||
12297 | } | ||||||
12298 | |||||||
12299 | // Get the decls type and save a reference for later, since | ||||||
12300 | // CheckInitializerTypes may change it. | ||||||
12301 | QualType DclT = VDecl->getType(), SavT = DclT; | ||||||
12302 | |||||||
12303 | // Expressions default to 'id' when we're in a debugger | ||||||
12304 | // and we are assigning it to a variable of Objective-C pointer type. | ||||||
12305 | if (getLangOpts().DebuggerCastResultToId && DclT->isObjCObjectPointerType() && | ||||||
12306 | Init->getType() == Context.UnknownAnyTy) { | ||||||
12307 | ExprResult Result = forceUnknownAnyToType(Init, Context.getObjCIdType()); | ||||||
12308 | if (Result.isInvalid()) { | ||||||
12309 | VDecl->setInvalidDecl(); | ||||||
12310 | return; | ||||||
12311 | } | ||||||
12312 | Init = Result.get(); | ||||||
12313 | } | ||||||
12314 | |||||||
12315 | // Perform the initialization. | ||||||
12316 | ParenListExpr *CXXDirectInit = dyn_cast<ParenListExpr>(Init); | ||||||
12317 | if (!VDecl->isInvalidDecl()) { | ||||||
12318 | InitializedEntity Entity = InitializedEntity::InitializeVariable(VDecl); | ||||||
12319 | InitializationKind Kind = InitializationKind::CreateForInit( | ||||||
12320 | VDecl->getLocation(), DirectInit, Init); | ||||||
12321 | |||||||
12322 | MultiExprArg Args = Init; | ||||||
12323 | if (CXXDirectInit) | ||||||
12324 | Args = MultiExprArg(CXXDirectInit->getExprs(), | ||||||
12325 | CXXDirectInit->getNumExprs()); | ||||||
12326 | |||||||
12327 | // Try to correct any TypoExprs in the initialization arguments. | ||||||
12328 | for (size_t Idx = 0; Idx < Args.size(); ++Idx) { | ||||||
12329 | ExprResult Res = CorrectDelayedTyposInExpr( | ||||||
12330 | Args[Idx], VDecl, /*RecoverUncorrectedTypos=*/true, | ||||||
12331 | [this, Entity, Kind](Expr *E) { | ||||||
12332 | InitializationSequence Init(*this, Entity, Kind, MultiExprArg(E)); | ||||||
12333 | return Init.Failed() ? ExprError() : E; | ||||||
12334 | }); | ||||||
12335 | if (Res.isInvalid()) { | ||||||
12336 | VDecl->setInvalidDecl(); | ||||||
12337 | } else if (Res.get() != Args[Idx]) { | ||||||
12338 | Args[Idx] = Res.get(); | ||||||
12339 | } | ||||||
12340 | } | ||||||
12341 | if (VDecl->isInvalidDecl()) | ||||||
12342 | return; | ||||||
12343 | |||||||
12344 | InitializationSequence InitSeq(*this, Entity, Kind, Args, | ||||||
12345 | /*TopLevelOfInitList=*/false, | ||||||
12346 | /*TreatUnavailableAsInvalid=*/false); | ||||||
12347 | ExprResult Result = InitSeq.Perform(*this, Entity, Kind, Args, &DclT); | ||||||
12348 | if (Result.isInvalid()) { | ||||||
12349 | // If the provied initializer fails to initialize the var decl, | ||||||
12350 | // we attach a recovery expr for better recovery. | ||||||
12351 | auto RecoveryExpr = | ||||||
12352 | CreateRecoveryExpr(Init->getBeginLoc(), Init->getEndLoc(), Args); | ||||||
12353 | if (RecoveryExpr.get()) | ||||||
12354 | VDecl->setInit(RecoveryExpr.get()); | ||||||
12355 | return; | ||||||
12356 | } | ||||||
12357 | |||||||
12358 | Init = Result.getAs<Expr>(); | ||||||
12359 | } | ||||||
12360 | |||||||
12361 | // Check for self-references within variable initializers. | ||||||
12362 | // Variables declared within a function/method body (except for references) | ||||||
12363 | // are handled by a dataflow analysis. | ||||||
12364 | // This is undefined behavior in C++, but valid in C. | ||||||
12365 | if (getLangOpts().CPlusPlus) | ||||||
12366 | if (!VDecl->hasLocalStorage() || VDecl->getType()->isRecordType() || | ||||||
12367 | VDecl->getType()->isReferenceType()) | ||||||
12368 | CheckSelfReference(*this, RealDecl, Init, DirectInit); | ||||||
12369 | |||||||
12370 | // If the type changed, it means we had an incomplete type that was | ||||||
12371 | // completed by the initializer. For example: | ||||||
12372 | // int ary[] = { 1, 3, 5 }; | ||||||
12373 | // "ary" transitions from an IncompleteArrayType to a ConstantArrayType. | ||||||
12374 | if (!VDecl->isInvalidDecl() && (DclT != SavT)) | ||||||
12375 | VDecl->setType(DclT); | ||||||
12376 | |||||||
12377 | if (!VDecl->isInvalidDecl()) { | ||||||
12378 | checkUnsafeAssigns(VDecl->getLocation(), VDecl->getType(), Init); | ||||||
12379 | |||||||
12380 | if (VDecl->hasAttr<BlocksAttr>()) | ||||||
12381 | checkRetainCycles(VDecl, Init); | ||||||
12382 | |||||||
12383 | // It is safe to assign a weak reference into a strong variable. | ||||||
12384 | // Although this code can still have problems: | ||||||
12385 | // id x = self.weakProp; | ||||||
12386 | // id y = self.weakProp; | ||||||
12387 | // we do not warn to warn spuriously when 'x' and 'y' are on separate | ||||||
12388 | // paths through the function. This should be revisited if | ||||||
12389 | // -Wrepeated-use-of-weak is made flow-sensitive. | ||||||
12390 | if (FunctionScopeInfo *FSI = getCurFunction()) | ||||||
12391 | if ((VDecl->getType().getObjCLifetime() == Qualifiers::OCL_Strong || | ||||||
12392 | VDecl->getType().isNonWeakInMRRWithObjCWeak(Context)) && | ||||||
12393 | !Diags.isIgnored(diag::warn_arc_repeated_use_of_weak, | ||||||
12394 | Init->getBeginLoc())) | ||||||
12395 | FSI->markSafeWeakUse(Init); | ||||||
12396 | } | ||||||
12397 | |||||||
12398 | // The initialization is usually a full-expression. | ||||||
12399 | // | ||||||
12400 | // FIXME: If this is a braced initialization of an aggregate, it is not | ||||||
12401 | // an expression, and each individual field initializer is a separate | ||||||
12402 | // full-expression. For instance, in: | ||||||
12403 | // | ||||||
12404 | // struct Temp { ~Temp(); }; | ||||||
12405 | // struct S { S(Temp); }; | ||||||
12406 | // struct T { S a, b; } t = { Temp(), Temp() } | ||||||
12407 | // | ||||||
12408 | // we should destroy the first Temp before constructing the second. | ||||||
12409 | ExprResult Result = | ||||||
12410 | ActOnFinishFullExpr(Init, VDecl->getLocation(), | ||||||
12411 | /*DiscardedValue*/ false, VDecl->isConstexpr()); | ||||||
12412 | if (Result.isInvalid()) { | ||||||
12413 | VDecl->setInvalidDecl(); | ||||||
12414 | return; | ||||||
12415 | } | ||||||
12416 | Init = Result.get(); | ||||||
12417 | |||||||
12418 | // Attach the initializer to the decl. | ||||||
12419 | VDecl->setInit(Init); | ||||||
12420 | |||||||
12421 | if (VDecl->isLocalVarDecl()) { | ||||||
12422 | // Don't check the initializer if the declaration is malformed. | ||||||
12423 | if (VDecl->isInvalidDecl()) { | ||||||
12424 | // do nothing | ||||||
12425 | |||||||
12426 | // OpenCL v1.2 s6.5.3: __constant locals must be constant-initialized. | ||||||
12427 | // This is true even in C++ for OpenCL. | ||||||
12428 | } else if (VDecl->getType().getAddressSpace() == LangAS::opencl_constant) { | ||||||
12429 | CheckForConstantInitializer(Init, DclT); | ||||||
12430 | |||||||
12431 | // Otherwise, C++ does not restrict the initializer. | ||||||
12432 | } else if (getLangOpts().CPlusPlus) { | ||||||
12433 | // do nothing | ||||||
12434 | |||||||
12435 | // C99 6.7.8p4: All the expressions in an initializer for an object that has | ||||||
12436 | // static storage duration shall be constant expressions or string literals. | ||||||
12437 | } else if (VDecl->getStorageClass() == SC_Static) { | ||||||
12438 | CheckForConstantInitializer(Init, DclT); | ||||||
12439 | |||||||
12440 | // C89 is stricter than C99 for aggregate initializers. | ||||||
12441 | // C89 6.5.7p3: All the expressions [...] in an initializer list | ||||||
12442 | // for an object that has aggregate or union type shall be | ||||||
12443 | // constant expressions. | ||||||
12444 | } else if (!getLangOpts().C99 && VDecl->getType()->isAggregateType() && | ||||||
12445 | isa<InitListExpr>(Init)) { | ||||||
12446 | const Expr *Culprit; | ||||||
12447 | if (!Init->isConstantInitializer(Context, false, &Culprit)) { | ||||||
12448 | Diag(Culprit->getExprLoc(), | ||||||
12449 | diag::ext_aggregate_init_not_constant) | ||||||
12450 | << Culprit->getSourceRange(); | ||||||
12451 | } | ||||||
12452 | } | ||||||
12453 | |||||||
12454 | if (auto *E = dyn_cast<ExprWithCleanups>(Init)) | ||||||
12455 | if (auto *BE = dyn_cast<BlockExpr>(E->getSubExpr()->IgnoreParens())) | ||||||
12456 | if (VDecl->hasLocalStorage()) | ||||||
12457 | BE->getBlockDecl()->setCanAvoidCopyToHeap(); | ||||||
12458 | } else if (VDecl->isStaticDataMember() && !VDecl->isInline() && | ||||||
12459 | VDecl->getLexicalDeclContext()->isRecord()) { | ||||||
12460 | // This is an in-class initialization for a static data member, e.g., | ||||||
12461 | // | ||||||
12462 | // struct S { | ||||||
12463 | // static const int value = 17; | ||||||
12464 | // }; | ||||||
12465 | |||||||
12466 | // C++ [class.mem]p4: | ||||||
12467 | // A member-declarator can contain a constant-initializer only | ||||||
12468 | // if it declares a static member (9.4) of const integral or | ||||||
12469 | // const enumeration type, see 9.4.2. | ||||||
12470 | // | ||||||
12471 | // C++11 [class.static.data]p3: | ||||||
12472 | // If a non-volatile non-inline const static data member is of integral | ||||||
12473 | // or enumeration type, its declaration in the class definition can | ||||||
12474 | // specify a brace-or-equal-initializer in which every initializer-clause | ||||||
12475 | // that is an assignment-expression is a constant expression. A static | ||||||
12476 | // data member of literal type can be declared in the class definition | ||||||
12477 | // with the constexpr specifier; if so, its declaration shall specify a | ||||||
12478 | // brace-or-equal-initializer in which every initializer-clause that is | ||||||
12479 | // an assignment-expression is a constant expression. | ||||||
12480 | |||||||
12481 | // Do nothing on dependent types. | ||||||
12482 | if (DclT->isDependentType()) { | ||||||
12483 | |||||||
12484 | // Allow any 'static constexpr' members, whether or not they are of literal | ||||||
12485 | // type. We separately check that every constexpr variable is of literal | ||||||
12486 | // type. | ||||||
12487 | } else if (VDecl->isConstexpr()) { | ||||||
12488 | |||||||
12489 | // Require constness. | ||||||
12490 | } else if (!DclT.isConstQualified()) { | ||||||
12491 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_non_const) | ||||||
12492 | << Init->getSourceRange(); | ||||||
12493 | VDecl->setInvalidDecl(); | ||||||
12494 | |||||||
12495 | // We allow integer constant expressions in all cases. | ||||||
12496 | } else if (DclT->isIntegralOrEnumerationType()) { | ||||||
12497 | // Check whether the expression is a constant expression. | ||||||
12498 | SourceLocation Loc; | ||||||
12499 | if (getLangOpts().CPlusPlus11 && DclT.isVolatileQualified()) | ||||||
12500 | // In C++11, a non-constexpr const static data member with an | ||||||
12501 | // in-class initializer cannot be volatile. | ||||||
12502 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_volatile); | ||||||
12503 | else if (Init->isValueDependent()) | ||||||
12504 | ; // Nothing to check. | ||||||
12505 | else if (Init->isIntegerConstantExpr(Context, &Loc)) | ||||||
12506 | ; // Ok, it's an ICE! | ||||||
12507 | else if (Init->getType()->isScopedEnumeralType() && | ||||||
12508 | Init->isCXX11ConstantExpr(Context)) | ||||||
12509 | ; // Ok, it is a scoped-enum constant expression. | ||||||
12510 | else if (Init->isEvaluatable(Context)) { | ||||||
12511 | // If we can constant fold the initializer through heroics, accept it, | ||||||
12512 | // but report this as a use of an extension for -pedantic. | ||||||
12513 | Diag(Loc, diag::ext_in_class_initializer_non_constant) | ||||||
12514 | << Init->getSourceRange(); | ||||||
12515 | } else { | ||||||
12516 | // Otherwise, this is some crazy unknown case. Report the issue at the | ||||||
12517 | // location provided by the isIntegerConstantExpr failed check. | ||||||
12518 | Diag(Loc, diag::err_in_class_initializer_non_constant) | ||||||
12519 | << Init->getSourceRange(); | ||||||
12520 | VDecl->setInvalidDecl(); | ||||||
12521 | } | ||||||
12522 | |||||||
12523 | // We allow foldable floating-point constants as an extension. | ||||||
12524 | } else if (DclT->isFloatingType()) { // also permits complex, which is ok | ||||||
12525 | // In C++98, this is a GNU extension. In C++11, it is not, but we support | ||||||
12526 | // it anyway and provide a fixit to add the 'constexpr'. | ||||||
12527 | if (getLangOpts().CPlusPlus11) { | ||||||
12528 | Diag(VDecl->getLocation(), | ||||||
12529 | diag::ext_in_class_initializer_float_type_cxx11) | ||||||
12530 | << DclT << Init->getSourceRange(); | ||||||
12531 | Diag(VDecl->getBeginLoc(), | ||||||
12532 | diag::note_in_class_initializer_float_type_cxx11) | ||||||
12533 | << FixItHint::CreateInsertion(VDecl->getBeginLoc(), "constexpr "); | ||||||
12534 | } else { | ||||||
12535 | Diag(VDecl->getLocation(), diag::ext_in_class_initializer_float_type) | ||||||
12536 | << DclT << Init->getSourceRange(); | ||||||
12537 | |||||||
12538 | if (!Init->isValueDependent() && !Init->isEvaluatable(Context)) { | ||||||
12539 | Diag(Init->getExprLoc(), diag::err_in_class_initializer_non_constant) | ||||||
12540 | << Init->getSourceRange(); | ||||||
12541 | VDecl->setInvalidDecl(); | ||||||
12542 | } | ||||||
12543 | } | ||||||
12544 | |||||||
12545 | // Suggest adding 'constexpr' in C++11 for literal types. | ||||||
12546 | } else if (getLangOpts().CPlusPlus11 && DclT->isLiteralType(Context)) { | ||||||
12547 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_literal_type) | ||||||
12548 | << DclT << Init->getSourceRange() | ||||||
12549 | << FixItHint::CreateInsertion(VDecl->getBeginLoc(), "constexpr "); | ||||||
12550 | VDecl->setConstexpr(true); | ||||||
12551 | |||||||
12552 | } else { | ||||||
12553 | Diag(VDecl->getLocation(), diag::err_in_class_initializer_bad_type) | ||||||
12554 | << DclT << Init->getSourceRange(); | ||||||
12555 | VDecl->setInvalidDecl(); | ||||||
12556 | } | ||||||
12557 | } else if (VDecl->isFileVarDecl()) { | ||||||
12558 | // In C, extern is typically used to avoid tentative definitions when | ||||||
12559 | // declaring variables in headers, but adding an intializer makes it a | ||||||
12560 | // definition. This is somewhat confusing, so GCC and Clang both warn on it. | ||||||
12561 | // In C++, extern is often used to give implictly static const variables | ||||||
12562 | // external linkage, so don't warn in that case. If selectany is present, | ||||||
12563 | // this might be header code intended for C and C++ inclusion, so apply the | ||||||
12564 | // C++ rules. | ||||||
12565 | if (VDecl->getStorageClass() == SC_Extern && | ||||||
12566 | ((!getLangOpts().CPlusPlus && !VDecl->hasAttr<SelectAnyAttr>()) || | ||||||
12567 | !Context.getBaseElementType(VDecl->getType()).isConstQualified()) && | ||||||
12568 | !(getLangOpts().CPlusPlus && VDecl->isExternC()) && | ||||||
12569 | !isTemplateInstantiation(VDecl->getTemplateSpecializationKind())) | ||||||
12570 | Diag(VDecl->getLocation(), diag::warn_extern_init); | ||||||
12571 | |||||||
12572 | // In Microsoft C++ mode, a const variable defined in namespace scope has | ||||||
12573 | // external linkage by default if the variable is declared with | ||||||
12574 | // __declspec(dllexport). | ||||||
12575 | if (Context.getTargetInfo().getCXXABI().isMicrosoft() && | ||||||
12576 | getLangOpts().CPlusPlus && VDecl->getType().isConstQualified() && | ||||||
12577 | VDecl->hasAttr<DLLExportAttr>() && VDecl->getDefinition()) | ||||||
12578 | VDecl->setStorageClass(SC_Extern); | ||||||
12579 | |||||||
12580 | // C99 6.7.8p4. All file scoped initializers need to be constant. | ||||||
12581 | if (!getLangOpts().CPlusPlus && !VDecl->isInvalidDecl()) | ||||||
12582 | CheckForConstantInitializer(Init, DclT); | ||||||
12583 | } | ||||||
12584 | |||||||
12585 | QualType InitType = Init->getType(); | ||||||
12586 | if (!InitType.isNull() && | ||||||
12587 | (InitType.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || | ||||||
12588 | InitType.hasNonTrivialToPrimitiveCopyCUnion())) | ||||||
12589 | checkNonTrivialCUnionInInitializer(Init, Init->getExprLoc()); | ||||||
12590 | |||||||
12591 | // We will represent direct-initialization similarly to copy-initialization: | ||||||
12592 | // int x(1); -as-> int x = 1; | ||||||
12593 | // ClassType x(a,b,c); -as-> ClassType x = ClassType(a,b,c); | ||||||
12594 | // | ||||||
12595 | // Clients that want to distinguish between the two forms, can check for | ||||||
12596 | // direct initializer using VarDecl::getInitStyle(). | ||||||
12597 | // A major benefit is that clients that don't particularly care about which | ||||||
12598 | // exactly form was it (like the CodeGen) can handle both cases without | ||||||
12599 | // special case code. | ||||||
12600 | |||||||
12601 | // C++ 8.5p11: | ||||||
12602 | // The form of initialization (using parentheses or '=') is generally | ||||||
12603 | // insignificant, but does matter when the entity being initialized has a | ||||||
12604 | // class type. | ||||||
12605 | if (CXXDirectInit) { | ||||||
12606 | assert(DirectInit && "Call-style initializer must be direct init.")(static_cast <bool> (DirectInit && "Call-style initializer must be direct init." ) ? void (0) : __assert_fail ("DirectInit && \"Call-style initializer must be direct init.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 12606, __extension__ __PRETTY_FUNCTION__)); | ||||||
12607 | VDecl->setInitStyle(VarDecl::CallInit); | ||||||
12608 | } else if (DirectInit) { | ||||||
12609 | // This must be list-initialization. No other way is direct-initialization. | ||||||
12610 | VDecl->setInitStyle(VarDecl::ListInit); | ||||||
12611 | } | ||||||
12612 | |||||||
12613 | if (LangOpts.OpenMP && VDecl->isFileVarDecl()) | ||||||
12614 | DeclsToCheckForDeferredDiags.insert(VDecl); | ||||||
12615 | CheckCompleteVariableDeclaration(VDecl); | ||||||
12616 | } | ||||||
12617 | |||||||
12618 | /// ActOnInitializerError - Given that there was an error parsing an | ||||||
12619 | /// initializer for the given declaration, try to return to some form | ||||||
12620 | /// of sanity. | ||||||
12621 | void Sema::ActOnInitializerError(Decl *D) { | ||||||
12622 | // Our main concern here is re-establishing invariants like "a | ||||||
12623 | // variable's type is either dependent or complete". | ||||||
12624 | if (!D || D->isInvalidDecl()) return; | ||||||
12625 | |||||||
12626 | VarDecl *VD = dyn_cast<VarDecl>(D); | ||||||
12627 | if (!VD) return; | ||||||
12628 | |||||||
12629 | // Bindings are not usable if we can't make sense of the initializer. | ||||||
12630 | if (auto *DD = dyn_cast<DecompositionDecl>(D)) | ||||||
12631 | for (auto *BD : DD->bindings()) | ||||||
12632 | BD->setInvalidDecl(); | ||||||
12633 | |||||||
12634 | // Auto types are meaningless if we can't make sense of the initializer. | ||||||
12635 | if (VD->getType()->isUndeducedType()) { | ||||||
12636 | D->setInvalidDecl(); | ||||||
12637 | return; | ||||||
12638 | } | ||||||
12639 | |||||||
12640 | QualType Ty = VD->getType(); | ||||||
12641 | if (Ty->isDependentType()) return; | ||||||
12642 | |||||||
12643 | // Require a complete type. | ||||||
12644 | if (RequireCompleteType(VD->getLocation(), | ||||||
12645 | Context.getBaseElementType(Ty), | ||||||
12646 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12647 | VD->setInvalidDecl(); | ||||||
12648 | return; | ||||||
12649 | } | ||||||
12650 | |||||||
12651 | // Require a non-abstract type. | ||||||
12652 | if (RequireNonAbstractType(VD->getLocation(), Ty, | ||||||
12653 | diag::err_abstract_type_in_decl, | ||||||
12654 | AbstractVariableType)) { | ||||||
12655 | VD->setInvalidDecl(); | ||||||
12656 | return; | ||||||
12657 | } | ||||||
12658 | |||||||
12659 | // Don't bother complaining about constructors or destructors, | ||||||
12660 | // though. | ||||||
12661 | } | ||||||
12662 | |||||||
12663 | void Sema::ActOnUninitializedDecl(Decl *RealDecl) { | ||||||
12664 | // If there is no declaration, there was an error parsing it. Just ignore it. | ||||||
12665 | if (!RealDecl) | ||||||
12666 | return; | ||||||
12667 | |||||||
12668 | if (VarDecl *Var = dyn_cast<VarDecl>(RealDecl)) { | ||||||
12669 | QualType Type = Var->getType(); | ||||||
12670 | |||||||
12671 | // C++1z [dcl.dcl]p1 grammar implies that an initializer is mandatory. | ||||||
12672 | if (isa<DecompositionDecl>(RealDecl)) { | ||||||
12673 | Diag(Var->getLocation(), diag::err_decomp_decl_requires_init) << Var; | ||||||
12674 | Var->setInvalidDecl(); | ||||||
12675 | return; | ||||||
12676 | } | ||||||
12677 | |||||||
12678 | if (Type->isUndeducedType() && | ||||||
12679 | DeduceVariableDeclarationType(Var, false, nullptr)) | ||||||
12680 | return; | ||||||
12681 | |||||||
12682 | // C++11 [class.static.data]p3: A static data member can be declared with | ||||||
12683 | // the constexpr specifier; if so, its declaration shall specify | ||||||
12684 | // a brace-or-equal-initializer. | ||||||
12685 | // C++11 [dcl.constexpr]p1: The constexpr specifier shall be applied only to | ||||||
12686 | // the definition of a variable [...] or the declaration of a static data | ||||||
12687 | // member. | ||||||
12688 | if (Var->isConstexpr() && !Var->isThisDeclarationADefinition() && | ||||||
12689 | !Var->isThisDeclarationADemotedDefinition()) { | ||||||
12690 | if (Var->isStaticDataMember()) { | ||||||
12691 | // C++1z removes the relevant rule; the in-class declaration is always | ||||||
12692 | // a definition there. | ||||||
12693 | if (!getLangOpts().CPlusPlus17 && | ||||||
12694 | !Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
12695 | Diag(Var->getLocation(), | ||||||
12696 | diag::err_constexpr_static_mem_var_requires_init) | ||||||
12697 | << Var; | ||||||
12698 | Var->setInvalidDecl(); | ||||||
12699 | return; | ||||||
12700 | } | ||||||
12701 | } else { | ||||||
12702 | Diag(Var->getLocation(), diag::err_invalid_constexpr_var_decl); | ||||||
12703 | Var->setInvalidDecl(); | ||||||
12704 | return; | ||||||
12705 | } | ||||||
12706 | } | ||||||
12707 | |||||||
12708 | // OpenCL v1.1 s6.5.3: variables declared in the constant address space must | ||||||
12709 | // be initialized. | ||||||
12710 | if (!Var->isInvalidDecl() && | ||||||
12711 | Var->getType().getAddressSpace() == LangAS::opencl_constant && | ||||||
12712 | Var->getStorageClass() != SC_Extern && !Var->getInit()) { | ||||||
12713 | bool HasConstExprDefaultConstructor = false; | ||||||
12714 | if (CXXRecordDecl *RD = Var->getType()->getAsCXXRecordDecl()) { | ||||||
12715 | for (auto *Ctor : RD->ctors()) { | ||||||
12716 | if (Ctor->isConstexpr() && Ctor->getNumParams() == 0 && | ||||||
12717 | Ctor->getMethodQualifiers().getAddressSpace() == | ||||||
12718 | LangAS::opencl_constant) { | ||||||
12719 | HasConstExprDefaultConstructor = true; | ||||||
12720 | } | ||||||
12721 | } | ||||||
12722 | } | ||||||
12723 | if (!HasConstExprDefaultConstructor) { | ||||||
12724 | Diag(Var->getLocation(), diag::err_opencl_constant_no_init); | ||||||
12725 | Var->setInvalidDecl(); | ||||||
12726 | return; | ||||||
12727 | } | ||||||
12728 | } | ||||||
12729 | |||||||
12730 | if (!Var->isInvalidDecl() && RealDecl->hasAttr<LoaderUninitializedAttr>()) { | ||||||
12731 | if (Var->getStorageClass() == SC_Extern) { | ||||||
12732 | Diag(Var->getLocation(), diag::err_loader_uninitialized_extern_decl) | ||||||
12733 | << Var; | ||||||
12734 | Var->setInvalidDecl(); | ||||||
12735 | return; | ||||||
12736 | } | ||||||
12737 | if (RequireCompleteType(Var->getLocation(), Var->getType(), | ||||||
12738 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12739 | Var->setInvalidDecl(); | ||||||
12740 | return; | ||||||
12741 | } | ||||||
12742 | if (CXXRecordDecl *RD = Var->getType()->getAsCXXRecordDecl()) { | ||||||
12743 | if (!RD->hasTrivialDefaultConstructor()) { | ||||||
12744 | Diag(Var->getLocation(), diag::err_loader_uninitialized_trivial_ctor); | ||||||
12745 | Var->setInvalidDecl(); | ||||||
12746 | return; | ||||||
12747 | } | ||||||
12748 | } | ||||||
12749 | // The declaration is unitialized, no need for further checks. | ||||||
12750 | return; | ||||||
12751 | } | ||||||
12752 | |||||||
12753 | VarDecl::DefinitionKind DefKind = Var->isThisDeclarationADefinition(); | ||||||
12754 | if (!Var->isInvalidDecl() && DefKind != VarDecl::DeclarationOnly && | ||||||
12755 | Var->getType().hasNonTrivialToPrimitiveDefaultInitializeCUnion()) | ||||||
12756 | checkNonTrivialCUnion(Var->getType(), Var->getLocation(), | ||||||
12757 | NTCUC_DefaultInitializedObject, NTCUK_Init); | ||||||
12758 | |||||||
12759 | |||||||
12760 | switch (DefKind) { | ||||||
12761 | case VarDecl::Definition: | ||||||
12762 | if (!Var->isStaticDataMember() || !Var->getAnyInitializer()) | ||||||
12763 | break; | ||||||
12764 | |||||||
12765 | // We have an out-of-line definition of a static data member | ||||||
12766 | // that has an in-class initializer, so we type-check this like | ||||||
12767 | // a declaration. | ||||||
12768 | // | ||||||
12769 | LLVM_FALLTHROUGH[[gnu::fallthrough]]; | ||||||
12770 | |||||||
12771 | case VarDecl::DeclarationOnly: | ||||||
12772 | // It's only a declaration. | ||||||
12773 | |||||||
12774 | // Block scope. C99 6.7p7: If an identifier for an object is | ||||||
12775 | // declared with no linkage (C99 6.2.2p6), the type for the | ||||||
12776 | // object shall be complete. | ||||||
12777 | if (!Type->isDependentType() && Var->isLocalVarDecl() && | ||||||
12778 | !Var->hasLinkage() && !Var->isInvalidDecl() && | ||||||
12779 | RequireCompleteType(Var->getLocation(), Type, | ||||||
12780 | diag::err_typecheck_decl_incomplete_type)) | ||||||
12781 | Var->setInvalidDecl(); | ||||||
12782 | |||||||
12783 | // Make sure that the type is not abstract. | ||||||
12784 | if (!Type->isDependentType() && !Var->isInvalidDecl() && | ||||||
12785 | RequireNonAbstractType(Var->getLocation(), Type, | ||||||
12786 | diag::err_abstract_type_in_decl, | ||||||
12787 | AbstractVariableType)) | ||||||
12788 | Var->setInvalidDecl(); | ||||||
12789 | if (!Type->isDependentType() && !Var->isInvalidDecl() && | ||||||
12790 | Var->getStorageClass() == SC_PrivateExtern) { | ||||||
12791 | Diag(Var->getLocation(), diag::warn_private_extern); | ||||||
12792 | Diag(Var->getLocation(), diag::note_private_extern); | ||||||
12793 | } | ||||||
12794 | |||||||
12795 | if (Context.getTargetInfo().allowDebugInfoForExternalRef() && | ||||||
12796 | !Var->isInvalidDecl() && !getLangOpts().CPlusPlus) | ||||||
12797 | ExternalDeclarations.push_back(Var); | ||||||
12798 | |||||||
12799 | return; | ||||||
12800 | |||||||
12801 | case VarDecl::TentativeDefinition: | ||||||
12802 | // File scope. C99 6.9.2p2: A declaration of an identifier for an | ||||||
12803 | // object that has file scope without an initializer, and without a | ||||||
12804 | // storage-class specifier or with the storage-class specifier "static", | ||||||
12805 | // constitutes a tentative definition. Note: A tentative definition with | ||||||
12806 | // external linkage is valid (C99 6.2.2p5). | ||||||
12807 | if (!Var->isInvalidDecl()) { | ||||||
12808 | if (const IncompleteArrayType *ArrayT | ||||||
12809 | = Context.getAsIncompleteArrayType(Type)) { | ||||||
12810 | if (RequireCompleteSizedType( | ||||||
12811 | Var->getLocation(), ArrayT->getElementType(), | ||||||
12812 | diag::err_array_incomplete_or_sizeless_type)) | ||||||
12813 | Var->setInvalidDecl(); | ||||||
12814 | } else if (Var->getStorageClass() == SC_Static) { | ||||||
12815 | // C99 6.9.2p3: If the declaration of an identifier for an object is | ||||||
12816 | // a tentative definition and has internal linkage (C99 6.2.2p3), the | ||||||
12817 | // declared type shall not be an incomplete type. | ||||||
12818 | // NOTE: code such as the following | ||||||
12819 | // static struct s; | ||||||
12820 | // struct s { int a; }; | ||||||
12821 | // is accepted by gcc. Hence here we issue a warning instead of | ||||||
12822 | // an error and we do not invalidate the static declaration. | ||||||
12823 | // NOTE: to avoid multiple warnings, only check the first declaration. | ||||||
12824 | if (Var->isFirstDecl()) | ||||||
12825 | RequireCompleteType(Var->getLocation(), Type, | ||||||
12826 | diag::ext_typecheck_decl_incomplete_type); | ||||||
12827 | } | ||||||
12828 | } | ||||||
12829 | |||||||
12830 | // Record the tentative definition; we're done. | ||||||
12831 | if (!Var->isInvalidDecl()) | ||||||
12832 | TentativeDefinitions.push_back(Var); | ||||||
12833 | return; | ||||||
12834 | } | ||||||
12835 | |||||||
12836 | // Provide a specific diagnostic for uninitialized variable | ||||||
12837 | // definitions with incomplete array type. | ||||||
12838 | if (Type->isIncompleteArrayType()) { | ||||||
12839 | Diag(Var->getLocation(), | ||||||
12840 | diag::err_typecheck_incomplete_array_needs_initializer); | ||||||
12841 | Var->setInvalidDecl(); | ||||||
12842 | return; | ||||||
12843 | } | ||||||
12844 | |||||||
12845 | // Provide a specific diagnostic for uninitialized variable | ||||||
12846 | // definitions with reference type. | ||||||
12847 | if (Type->isReferenceType()) { | ||||||
12848 | Diag(Var->getLocation(), diag::err_reference_var_requires_init) | ||||||
12849 | << Var << SourceRange(Var->getLocation(), Var->getLocation()); | ||||||
12850 | Var->setInvalidDecl(); | ||||||
12851 | return; | ||||||
12852 | } | ||||||
12853 | |||||||
12854 | // Do not attempt to type-check the default initializer for a | ||||||
12855 | // variable with dependent type. | ||||||
12856 | if (Type->isDependentType()) | ||||||
12857 | return; | ||||||
12858 | |||||||
12859 | if (Var->isInvalidDecl()) | ||||||
12860 | return; | ||||||
12861 | |||||||
12862 | if (!Var->hasAttr<AliasAttr>()) { | ||||||
12863 | if (RequireCompleteType(Var->getLocation(), | ||||||
12864 | Context.getBaseElementType(Type), | ||||||
12865 | diag::err_typecheck_decl_incomplete_type)) { | ||||||
12866 | Var->setInvalidDecl(); | ||||||
12867 | return; | ||||||
12868 | } | ||||||
12869 | } else { | ||||||
12870 | return; | ||||||
12871 | } | ||||||
12872 | |||||||
12873 | // The variable can not have an abstract class type. | ||||||
12874 | if (RequireNonAbstractType(Var->getLocation(), Type, | ||||||
12875 | diag::err_abstract_type_in_decl, | ||||||
12876 | AbstractVariableType)) { | ||||||
12877 | Var->setInvalidDecl(); | ||||||
12878 | return; | ||||||
12879 | } | ||||||
12880 | |||||||
12881 | // Check for jumps past the implicit initializer. C++0x | ||||||
12882 | // clarifies that this applies to a "variable with automatic | ||||||
12883 | // storage duration", not a "local variable". | ||||||
12884 | // C++11 [stmt.dcl]p3 | ||||||
12885 | // A program that jumps from a point where a variable with automatic | ||||||
12886 | // storage duration is not in scope to a point where it is in scope is | ||||||
12887 | // ill-formed unless the variable has scalar type, class type with a | ||||||
12888 | // trivial default constructor and a trivial destructor, a cv-qualified | ||||||
12889 | // version of one of these types, or an array of one of the preceding | ||||||
12890 | // types and is declared without an initializer. | ||||||
12891 | if (getLangOpts().CPlusPlus && Var->hasLocalStorage()) { | ||||||
12892 | if (const RecordType *Record | ||||||
12893 | = Context.getBaseElementType(Type)->getAs<RecordType>()) { | ||||||
12894 | CXXRecordDecl *CXXRecord = cast<CXXRecordDecl>(Record->getDecl()); | ||||||
12895 | // Mark the function (if we're in one) for further checking even if the | ||||||
12896 | // looser rules of C++11 do not require such checks, so that we can | ||||||
12897 | // diagnose incompatibilities with C++98. | ||||||
12898 | if (!CXXRecord->isPOD()) | ||||||
12899 | setFunctionHasBranchProtectedScope(); | ||||||
12900 | } | ||||||
12901 | } | ||||||
12902 | // In OpenCL, we can't initialize objects in the __local address space, | ||||||
12903 | // even implicitly, so don't synthesize an implicit initializer. | ||||||
12904 | if (getLangOpts().OpenCL && | ||||||
12905 | Var->getType().getAddressSpace() == LangAS::opencl_local) | ||||||
12906 | return; | ||||||
12907 | // C++03 [dcl.init]p9: | ||||||
12908 | // If no initializer is specified for an object, and the | ||||||
12909 | // object is of (possibly cv-qualified) non-POD class type (or | ||||||
12910 | // array thereof), the object shall be default-initialized; if | ||||||
12911 | // the object is of const-qualified type, the underlying class | ||||||
12912 | // type shall have a user-declared default | ||||||
12913 | // constructor. Otherwise, if no initializer is specified for | ||||||
12914 | // a non- static object, the object and its subobjects, if | ||||||
12915 | // any, have an indeterminate initial value); if the object | ||||||
12916 | // or any of its subobjects are of const-qualified type, the | ||||||
12917 | // program is ill-formed. | ||||||
12918 | // C++0x [dcl.init]p11: | ||||||
12919 | // If no initializer is specified for an object, the object is | ||||||
12920 | // default-initialized; [...]. | ||||||
12921 | InitializedEntity Entity = InitializedEntity::InitializeVariable(Var); | ||||||
12922 | InitializationKind Kind | ||||||
12923 | = InitializationKind::CreateDefault(Var->getLocation()); | ||||||
12924 | |||||||
12925 | InitializationSequence InitSeq(*this, Entity, Kind, None); | ||||||
12926 | ExprResult Init = InitSeq.Perform(*this, Entity, Kind, None); | ||||||
12927 | |||||||
12928 | if (Init.get()) { | ||||||
12929 | Var->setInit(MaybeCreateExprWithCleanups(Init.get())); | ||||||
12930 | // This is important for template substitution. | ||||||
12931 | Var->setInitStyle(VarDecl::CallInit); | ||||||
12932 | } else if (Init.isInvalid()) { | ||||||
12933 | // If default-init fails, attach a recovery-expr initializer to track | ||||||
12934 | // that initialization was attempted and failed. | ||||||
12935 | auto RecoveryExpr = | ||||||
12936 | CreateRecoveryExpr(Var->getLocation(), Var->getLocation(), {}); | ||||||
12937 | if (RecoveryExpr.get()) | ||||||
12938 | Var->setInit(RecoveryExpr.get()); | ||||||
12939 | } | ||||||
12940 | |||||||
12941 | CheckCompleteVariableDeclaration(Var); | ||||||
12942 | } | ||||||
12943 | } | ||||||
12944 | |||||||
12945 | void Sema::ActOnCXXForRangeDecl(Decl *D) { | ||||||
12946 | // If there is no declaration, there was an error parsing it. Ignore it. | ||||||
12947 | if (!D) | ||||||
12948 | return; | ||||||
12949 | |||||||
12950 | VarDecl *VD = dyn_cast<VarDecl>(D); | ||||||
12951 | if (!VD) { | ||||||
12952 | Diag(D->getLocation(), diag::err_for_range_decl_must_be_var); | ||||||
12953 | D->setInvalidDecl(); | ||||||
12954 | return; | ||||||
12955 | } | ||||||
12956 | |||||||
12957 | VD->setCXXForRangeDecl(true); | ||||||
12958 | |||||||
12959 | // for-range-declaration cannot be given a storage class specifier. | ||||||
12960 | int Error = -1; | ||||||
12961 | switch (VD->getStorageClass()) { | ||||||
12962 | case SC_None: | ||||||
12963 | break; | ||||||
12964 | case SC_Extern: | ||||||
12965 | Error = 0; | ||||||
12966 | break; | ||||||
12967 | case SC_Static: | ||||||
12968 | Error = 1; | ||||||
12969 | break; | ||||||
12970 | case SC_PrivateExtern: | ||||||
12971 | Error = 2; | ||||||
12972 | break; | ||||||
12973 | case SC_Auto: | ||||||
12974 | Error = 3; | ||||||
12975 | break; | ||||||
12976 | case SC_Register: | ||||||
12977 | Error = 4; | ||||||
12978 | break; | ||||||
12979 | } | ||||||
12980 | |||||||
12981 | // for-range-declaration cannot be given a storage class specifier con't. | ||||||
12982 | switch (VD->getTSCSpec()) { | ||||||
12983 | case TSCS_thread_local: | ||||||
12984 | Error = 6; | ||||||
12985 | break; | ||||||
12986 | case TSCS___thread: | ||||||
12987 | case TSCS__Thread_local: | ||||||
12988 | case TSCS_unspecified: | ||||||
12989 | break; | ||||||
12990 | } | ||||||
12991 | |||||||
12992 | if (Error != -1) { | ||||||
12993 | Diag(VD->getOuterLocStart(), diag::err_for_range_storage_class) | ||||||
12994 | << VD << Error; | ||||||
12995 | D->setInvalidDecl(); | ||||||
12996 | } | ||||||
12997 | } | ||||||
12998 | |||||||
12999 | StmtResult | ||||||
13000 | Sema::ActOnCXXForRangeIdentifier(Scope *S, SourceLocation IdentLoc, | ||||||
13001 | IdentifierInfo *Ident, | ||||||
13002 | ParsedAttributes &Attrs, | ||||||
13003 | SourceLocation AttrEnd) { | ||||||
13004 | // C++1y [stmt.iter]p1: | ||||||
13005 | // A range-based for statement of the form | ||||||
13006 | // for ( for-range-identifier : for-range-initializer ) statement | ||||||
13007 | // is equivalent to | ||||||
13008 | // for ( auto&& for-range-identifier : for-range-initializer ) statement | ||||||
13009 | DeclSpec DS(Attrs.getPool().getFactory()); | ||||||
13010 | |||||||
13011 | const char *PrevSpec; | ||||||
13012 | unsigned DiagID; | ||||||
13013 | DS.SetTypeSpecType(DeclSpec::TST_auto, IdentLoc, PrevSpec, DiagID, | ||||||
13014 | getPrintingPolicy()); | ||||||
13015 | |||||||
13016 | Declarator D(DS, DeclaratorContext::ForInit); | ||||||
13017 | D.SetIdentifier(Ident, IdentLoc); | ||||||
13018 | D.takeAttributes(Attrs, AttrEnd); | ||||||
13019 | |||||||
13020 | D.AddTypeInfo(DeclaratorChunk::getReference(0, IdentLoc, /*lvalue*/ false), | ||||||
13021 | IdentLoc); | ||||||
13022 | Decl *Var = ActOnDeclarator(S, D); | ||||||
13023 | cast<VarDecl>(Var)->setCXXForRangeDecl(true); | ||||||
13024 | FinalizeDeclaration(Var); | ||||||
13025 | return ActOnDeclStmt(FinalizeDeclaratorGroup(S, DS, Var), IdentLoc, | ||||||
13026 | AttrEnd.isValid() ? AttrEnd : IdentLoc); | ||||||
13027 | } | ||||||
13028 | |||||||
13029 | void Sema::CheckCompleteVariableDeclaration(VarDecl *var) { | ||||||
13030 | if (var->isInvalidDecl()) return; | ||||||
13031 | |||||||
13032 | MaybeAddCUDAConstantAttr(var); | ||||||
13033 | |||||||
13034 | if (getLangOpts().OpenCL) { | ||||||
13035 | // OpenCL v2.0 s6.12.5 - Every block variable declaration must have an | ||||||
13036 | // initialiser | ||||||
13037 | if (var->getTypeSourceInfo()->getType()->isBlockPointerType() && | ||||||
13038 | !var->hasInit()) { | ||||||
13039 | Diag(var->getLocation(), diag::err_opencl_invalid_block_declaration) | ||||||
13040 | << 1 /*Init*/; | ||||||
13041 | var->setInvalidDecl(); | ||||||
13042 | return; | ||||||
13043 | } | ||||||
13044 | } | ||||||
13045 | |||||||
13046 | // In Objective-C, don't allow jumps past the implicit initialization of a | ||||||
13047 | // local retaining variable. | ||||||
13048 | if (getLangOpts().ObjC && | ||||||
13049 | var->hasLocalStorage()) { | ||||||
13050 | switch (var->getType().getObjCLifetime()) { | ||||||
13051 | case Qualifiers::OCL_None: | ||||||
13052 | case Qualifiers::OCL_ExplicitNone: | ||||||
13053 | case Qualifiers::OCL_Autoreleasing: | ||||||
13054 | break; | ||||||
13055 | |||||||
13056 | case Qualifiers::OCL_Weak: | ||||||
13057 | case Qualifiers::OCL_Strong: | ||||||
13058 | setFunctionHasBranchProtectedScope(); | ||||||
13059 | break; | ||||||
13060 | } | ||||||
13061 | } | ||||||
13062 | |||||||
13063 | if (var->hasLocalStorage() && | ||||||
13064 | var->getType().isDestructedType() == QualType::DK_nontrivial_c_struct) | ||||||
13065 | setFunctionHasBranchProtectedScope(); | ||||||
13066 | |||||||
13067 | // Warn about externally-visible variables being defined without a | ||||||
13068 | // prior declaration. We only want to do this for global | ||||||
13069 | // declarations, but we also specifically need to avoid doing it for | ||||||
13070 | // class members because the linkage of an anonymous class can | ||||||
13071 | // change if it's later given a typedef name. | ||||||
13072 | if (var->isThisDeclarationADefinition() && | ||||||
13073 | var->getDeclContext()->getRedeclContext()->isFileContext() && | ||||||
13074 | var->isExternallyVisible() && var->hasLinkage() && | ||||||
13075 | !var->isInline() && !var->getDescribedVarTemplate() && | ||||||
13076 | !isa<VarTemplatePartialSpecializationDecl>(var) && | ||||||
13077 | !isTemplateInstantiation(var->getTemplateSpecializationKind()) && | ||||||
13078 | !getDiagnostics().isIgnored(diag::warn_missing_variable_declarations, | ||||||
13079 | var->getLocation())) { | ||||||
13080 | // Find a previous declaration that's not a definition. | ||||||
13081 | VarDecl *prev = var->getPreviousDecl(); | ||||||
13082 | while (prev && prev->isThisDeclarationADefinition()) | ||||||
13083 | prev = prev->getPreviousDecl(); | ||||||
13084 | |||||||
13085 | if (!prev) { | ||||||
13086 | Diag(var->getLocation(), diag::warn_missing_variable_declarations) << var; | ||||||
13087 | Diag(var->getTypeSpecStartLoc(), diag::note_static_for_internal_linkage) | ||||||
13088 | << /* variable */ 0; | ||||||
13089 | } | ||||||
13090 | } | ||||||
13091 | |||||||
13092 | // Cache the result of checking for constant initialization. | ||||||
13093 | Optional<bool> CacheHasConstInit; | ||||||
13094 | const Expr *CacheCulprit = nullptr; | ||||||
13095 | auto checkConstInit = [&]() mutable { | ||||||
13096 | if (!CacheHasConstInit) | ||||||
13097 | CacheHasConstInit = var->getInit()->isConstantInitializer( | ||||||
13098 | Context, var->getType()->isReferenceType(), &CacheCulprit); | ||||||
13099 | return *CacheHasConstInit; | ||||||
13100 | }; | ||||||
13101 | |||||||
13102 | if (var->getTLSKind() == VarDecl::TLS_Static) { | ||||||
13103 | if (var->getType().isDestructedType()) { | ||||||
13104 | // GNU C++98 edits for __thread, [basic.start.term]p3: | ||||||
13105 | // The type of an object with thread storage duration shall not | ||||||
13106 | // have a non-trivial destructor. | ||||||
13107 | Diag(var->getLocation(), diag::err_thread_nontrivial_dtor); | ||||||
13108 | if (getLangOpts().CPlusPlus11) | ||||||
13109 | Diag(var->getLocation(), diag::note_use_thread_local); | ||||||
13110 | } else if (getLangOpts().CPlusPlus && var->hasInit()) { | ||||||
13111 | if (!checkConstInit()) { | ||||||
13112 | // GNU C++98 edits for __thread, [basic.start.init]p4: | ||||||
13113 | // An object of thread storage duration shall not require dynamic | ||||||
13114 | // initialization. | ||||||
13115 | // FIXME: Need strict checking here. | ||||||
13116 | Diag(CacheCulprit->getExprLoc(), diag::err_thread_dynamic_init) | ||||||
13117 | << CacheCulprit->getSourceRange(); | ||||||
13118 | if (getLangOpts().CPlusPlus11) | ||||||
13119 | Diag(var->getLocation(), diag::note_use_thread_local); | ||||||
13120 | } | ||||||
13121 | } | ||||||
13122 | } | ||||||
13123 | |||||||
13124 | |||||||
13125 | if (!var->getType()->isStructureType() && var->hasInit() && | ||||||
13126 | isa<InitListExpr>(var->getInit())) { | ||||||
13127 | const auto *ILE = cast<InitListExpr>(var->getInit()); | ||||||
13128 | unsigned NumInits = ILE->getNumInits(); | ||||||
13129 | if (NumInits > 2) | ||||||
13130 | for (unsigned I = 0; I < NumInits; ++I) { | ||||||
13131 | const auto *Init = ILE->getInit(I); | ||||||
13132 | if (!Init) | ||||||
13133 | break; | ||||||
13134 | const auto *SL = dyn_cast<StringLiteral>(Init->IgnoreImpCasts()); | ||||||
13135 | if (!SL) | ||||||
13136 | break; | ||||||
13137 | |||||||
13138 | unsigned NumConcat = SL->getNumConcatenated(); | ||||||
13139 | // Diagnose missing comma in string array initialization. | ||||||
13140 | // Do not warn when all the elements in the initializer are concatenated | ||||||
13141 | // together. Do not warn for macros too. | ||||||
13142 | if (NumConcat == 2 && !SL->getBeginLoc().isMacroID()) { | ||||||
13143 | bool OnlyOneMissingComma = true; | ||||||
13144 | for (unsigned J = I + 1; J < NumInits; ++J) { | ||||||
13145 | const auto *Init = ILE->getInit(J); | ||||||
13146 | if (!Init) | ||||||
13147 | break; | ||||||
13148 | const auto *SLJ = dyn_cast<StringLiteral>(Init->IgnoreImpCasts()); | ||||||
13149 | if (!SLJ || SLJ->getNumConcatenated() > 1) { | ||||||
13150 | OnlyOneMissingComma = false; | ||||||
13151 | break; | ||||||
13152 | } | ||||||
13153 | } | ||||||
13154 | |||||||
13155 | if (OnlyOneMissingComma) { | ||||||
13156 | SmallVector<FixItHint, 1> Hints; | ||||||
13157 | for (unsigned i = 0; i < NumConcat - 1; ++i) | ||||||
13158 | Hints.push_back(FixItHint::CreateInsertion( | ||||||
13159 | PP.getLocForEndOfToken(SL->getStrTokenLoc(i)), ",")); | ||||||
13160 | |||||||
13161 | Diag(SL->getStrTokenLoc(1), | ||||||
13162 | diag::warn_concatenated_literal_array_init) | ||||||
13163 | << Hints; | ||||||
13164 | Diag(SL->getBeginLoc(), | ||||||
13165 | diag::note_concatenated_string_literal_silence); | ||||||
13166 | } | ||||||
13167 | // In any case, stop now. | ||||||
13168 | break; | ||||||
13169 | } | ||||||
13170 | } | ||||||
13171 | } | ||||||
13172 | |||||||
13173 | |||||||
13174 | QualType type = var->getType(); | ||||||
13175 | |||||||
13176 | if (var->hasAttr<BlocksAttr>()) | ||||||
13177 | getCurFunction()->addByrefBlockVar(var); | ||||||
13178 | |||||||
13179 | Expr *Init = var->getInit(); | ||||||
13180 | bool GlobalStorage = var->hasGlobalStorage(); | ||||||
13181 | bool IsGlobal = GlobalStorage && !var->isStaticLocal(); | ||||||
13182 | QualType baseType = Context.getBaseElementType(type); | ||||||
13183 | bool HasConstInit = true; | ||||||
13184 | |||||||
13185 | // Check whether the initializer is sufficiently constant. | ||||||
13186 | if (getLangOpts().CPlusPlus && !type->isDependentType() && Init && | ||||||
13187 | !Init->isValueDependent() && | ||||||
13188 | (GlobalStorage || var->isConstexpr() || | ||||||
13189 | var->mightBeUsableInConstantExpressions(Context))) { | ||||||
13190 | // If this variable might have a constant initializer or might be usable in | ||||||
13191 | // constant expressions, check whether or not it actually is now. We can't | ||||||
13192 | // do this lazily, because the result might depend on things that change | ||||||
13193 | // later, such as which constexpr functions happen to be defined. | ||||||
13194 | SmallVector<PartialDiagnosticAt, 8> Notes; | ||||||
13195 | if (!getLangOpts().CPlusPlus11) { | ||||||
13196 | // Prior to C++11, in contexts where a constant initializer is required, | ||||||
13197 | // the set of valid constant initializers is described by syntactic rules | ||||||
13198 | // in [expr.const]p2-6. | ||||||
13199 | // FIXME: Stricter checking for these rules would be useful for constinit / | ||||||
13200 | // -Wglobal-constructors. | ||||||
13201 | HasConstInit = checkConstInit(); | ||||||
13202 | |||||||
13203 | // Compute and cache the constant value, and remember that we have a | ||||||
13204 | // constant initializer. | ||||||
13205 | if (HasConstInit) { | ||||||
13206 | (void)var->checkForConstantInitialization(Notes); | ||||||
13207 | Notes.clear(); | ||||||
13208 | } else if (CacheCulprit) { | ||||||
13209 | Notes.emplace_back(CacheCulprit->getExprLoc(), | ||||||
13210 | PDiag(diag::note_invalid_subexpr_in_const_expr)); | ||||||
13211 | Notes.back().second << CacheCulprit->getSourceRange(); | ||||||
13212 | } | ||||||
13213 | } else { | ||||||
13214 | // Evaluate the initializer to see if it's a constant initializer. | ||||||
13215 | HasConstInit = var->checkForConstantInitialization(Notes); | ||||||
13216 | } | ||||||
13217 | |||||||
13218 | if (HasConstInit) { | ||||||
13219 | // FIXME: Consider replacing the initializer with a ConstantExpr. | ||||||
13220 | } else if (var->isConstexpr()) { | ||||||
13221 | SourceLocation DiagLoc = var->getLocation(); | ||||||
13222 | // If the note doesn't add any useful information other than a source | ||||||
13223 | // location, fold it into the primary diagnostic. | ||||||
13224 | if (Notes.size() == 1 && Notes[0].second.getDiagID() == | ||||||
13225 | diag::note_invalid_subexpr_in_const_expr) { | ||||||
13226 | DiagLoc = Notes[0].first; | ||||||
13227 | Notes.clear(); | ||||||
13228 | } | ||||||
13229 | Diag(DiagLoc, diag::err_constexpr_var_requires_const_init) | ||||||
13230 | << var << Init->getSourceRange(); | ||||||
13231 | for (unsigned I = 0, N = Notes.size(); I != N; ++I) | ||||||
13232 | Diag(Notes[I].first, Notes[I].second); | ||||||
13233 | } else if (GlobalStorage && var->hasAttr<ConstInitAttr>()) { | ||||||
13234 | auto *Attr = var->getAttr<ConstInitAttr>(); | ||||||
13235 | Diag(var->getLocation(), diag::err_require_constant_init_failed) | ||||||
13236 | << Init->getSourceRange(); | ||||||
13237 | Diag(Attr->getLocation(), diag::note_declared_required_constant_init_here) | ||||||
13238 | << Attr->getRange() << Attr->isConstinit(); | ||||||
13239 | for (auto &it : Notes) | ||||||
13240 | Diag(it.first, it.second); | ||||||
13241 | } else if (IsGlobal && | ||||||
13242 | !getDiagnostics().isIgnored(diag::warn_global_constructor, | ||||||
13243 | var->getLocation())) { | ||||||
13244 | // Warn about globals which don't have a constant initializer. Don't | ||||||
13245 | // warn about globals with a non-trivial destructor because we already | ||||||
13246 | // warned about them. | ||||||
13247 | CXXRecordDecl *RD = baseType->getAsCXXRecordDecl(); | ||||||
13248 | if (!(RD && !RD->hasTrivialDestructor())) { | ||||||
13249 | // checkConstInit() here permits trivial default initialization even in | ||||||
13250 | // C++11 onwards, where such an initializer is not a constant initializer | ||||||
13251 | // but nonetheless doesn't require a global constructor. | ||||||
13252 | if (!checkConstInit()) | ||||||
13253 | Diag(var->getLocation(), diag::warn_global_constructor) | ||||||
13254 | << Init->getSourceRange(); | ||||||
13255 | } | ||||||
13256 | } | ||||||
13257 | } | ||||||
13258 | |||||||
13259 | // Apply section attributes and pragmas to global variables. | ||||||
13260 | if (GlobalStorage && var->isThisDeclarationADefinition() && | ||||||
13261 | !inTemplateInstantiation()) { | ||||||
13262 | PragmaStack<StringLiteral *> *Stack = nullptr; | ||||||
13263 | int SectionFlags = ASTContext::PSF_Read; | ||||||
13264 | if (var->getType().isConstQualified()) { | ||||||
13265 | if (HasConstInit) | ||||||
13266 | Stack = &ConstSegStack; | ||||||
13267 | else { | ||||||
13268 | Stack = &BSSSegStack; | ||||||
13269 | SectionFlags |= ASTContext::PSF_Write; | ||||||
13270 | } | ||||||
13271 | } else if (var->hasInit() && HasConstInit) { | ||||||
13272 | Stack = &DataSegStack; | ||||||
13273 | SectionFlags |= ASTContext::PSF_Write; | ||||||
13274 | } else { | ||||||
13275 | Stack = &BSSSegStack; | ||||||
13276 | SectionFlags |= ASTContext::PSF_Write; | ||||||
13277 | } | ||||||
13278 | if (const SectionAttr *SA = var->getAttr<SectionAttr>()) { | ||||||
13279 | if (SA->getSyntax() == AttributeCommonInfo::AS_Declspec) | ||||||
13280 | SectionFlags |= ASTContext::PSF_Implicit; | ||||||
13281 | UnifySection(SA->getName(), SectionFlags, var); | ||||||
13282 | } else if (Stack->CurrentValue) { | ||||||
13283 | SectionFlags |= ASTContext::PSF_Implicit; | ||||||
13284 | auto SectionName = Stack->CurrentValue->getString(); | ||||||
13285 | var->addAttr(SectionAttr::CreateImplicit( | ||||||
13286 | Context, SectionName, Stack->CurrentPragmaLocation, | ||||||
13287 | AttributeCommonInfo::AS_Pragma, SectionAttr::Declspec_allocate)); | ||||||
13288 | if (UnifySection(SectionName, SectionFlags, var)) | ||||||
13289 | var->dropAttr<SectionAttr>(); | ||||||
13290 | } | ||||||
13291 | |||||||
13292 | // Apply the init_seg attribute if this has an initializer. If the | ||||||
13293 | // initializer turns out to not be dynamic, we'll end up ignoring this | ||||||
13294 | // attribute. | ||||||
13295 | if (CurInitSeg && var->getInit()) | ||||||
13296 | var->addAttr(InitSegAttr::CreateImplicit(Context, CurInitSeg->getString(), | ||||||
13297 | CurInitSegLoc, | ||||||
13298 | AttributeCommonInfo::AS_Pragma)); | ||||||
13299 | } | ||||||
13300 | |||||||
13301 | // All the following checks are C++ only. | ||||||
13302 | if (!getLangOpts().CPlusPlus) { | ||||||
13303 | // If this variable must be emitted, add it as an initializer for the | ||||||
13304 | // current module. | ||||||
13305 | if (Context.DeclMustBeEmitted(var) && !ModuleScopes.empty()) | ||||||
13306 | Context.addModuleInitializer(ModuleScopes.back().Module, var); | ||||||
13307 | return; | ||||||
13308 | } | ||||||
13309 | |||||||
13310 | // Require the destructor. | ||||||
13311 | if (!type->isDependentType()) | ||||||
13312 | if (const RecordType *recordType = baseType->getAs<RecordType>()) | ||||||
13313 | FinalizeVarWithDestructor(var, recordType); | ||||||
13314 | |||||||
13315 | // If this variable must be emitted, add it as an initializer for the current | ||||||
13316 | // module. | ||||||
13317 | if (Context.DeclMustBeEmitted(var) && !ModuleScopes.empty()) | ||||||
13318 | Context.addModuleInitializer(ModuleScopes.back().Module, var); | ||||||
13319 | |||||||
13320 | // Build the bindings if this is a structured binding declaration. | ||||||
13321 | if (auto *DD = dyn_cast<DecompositionDecl>(var)) | ||||||
13322 | CheckCompleteDecompositionDeclaration(DD); | ||||||
13323 | } | ||||||
13324 | |||||||
13325 | /// Check if VD needs to be dllexport/dllimport due to being in a | ||||||
13326 | /// dllexport/import function. | ||||||
13327 | void Sema::CheckStaticLocalForDllExport(VarDecl *VD) { | ||||||
13328 | assert(VD->isStaticLocal())(static_cast <bool> (VD->isStaticLocal()) ? void (0) : __assert_fail ("VD->isStaticLocal()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 13328, __extension__ __PRETTY_FUNCTION__)); | ||||||
13329 | |||||||
13330 | auto *FD = dyn_cast_or_null<FunctionDecl>(VD->getParentFunctionOrMethod()); | ||||||
13331 | |||||||
13332 | // Find outermost function when VD is in lambda function. | ||||||
13333 | while (FD && !getDLLAttr(FD) && | ||||||
13334 | !FD->hasAttr<DLLExportStaticLocalAttr>() && | ||||||
13335 | !FD->hasAttr<DLLImportStaticLocalAttr>()) { | ||||||
13336 | FD = dyn_cast_or_null<FunctionDecl>(FD->getParentFunctionOrMethod()); | ||||||
13337 | } | ||||||
13338 | |||||||
13339 | if (!FD) | ||||||
13340 | return; | ||||||
13341 | |||||||
13342 | // Static locals inherit dll attributes from their function. | ||||||
13343 | if (Attr *A = getDLLAttr(FD)) { | ||||||
13344 | auto *NewAttr = cast<InheritableAttr>(A->clone(getASTContext())); | ||||||
13345 | NewAttr->setInherited(true); | ||||||
13346 | VD->addAttr(NewAttr); | ||||||
13347 | } else if (Attr *A = FD->getAttr<DLLExportStaticLocalAttr>()) { | ||||||
13348 | auto *NewAttr = DLLExportAttr::CreateImplicit(getASTContext(), *A); | ||||||
13349 | NewAttr->setInherited(true); | ||||||
13350 | VD->addAttr(NewAttr); | ||||||
13351 | |||||||
13352 | // Export this function to enforce exporting this static variable even | ||||||
13353 | // if it is not used in this compilation unit. | ||||||
13354 | if (!FD->hasAttr<DLLExportAttr>()) | ||||||
13355 | FD->addAttr(NewAttr); | ||||||
13356 | |||||||
13357 | } else if (Attr *A = FD->getAttr<DLLImportStaticLocalAttr>()) { | ||||||
13358 | auto *NewAttr = DLLImportAttr::CreateImplicit(getASTContext(), *A); | ||||||
13359 | NewAttr->setInherited(true); | ||||||
13360 | VD->addAttr(NewAttr); | ||||||
13361 | } | ||||||
13362 | } | ||||||
13363 | |||||||
13364 | /// FinalizeDeclaration - called by ParseDeclarationAfterDeclarator to perform | ||||||
13365 | /// any semantic actions necessary after any initializer has been attached. | ||||||
13366 | void Sema::FinalizeDeclaration(Decl *ThisDecl) { | ||||||
13367 | // Note that we are no longer parsing the initializer for this declaration. | ||||||
13368 | ParsingInitForAutoVars.erase(ThisDecl); | ||||||
13369 | |||||||
13370 | VarDecl *VD = dyn_cast_or_null<VarDecl>(ThisDecl); | ||||||
13371 | if (!VD) | ||||||
13372 | return; | ||||||
13373 | |||||||
13374 | // Apply an implicit SectionAttr if '#pragma clang section bss|data|rodata' is active | ||||||
13375 | if (VD->hasGlobalStorage() && VD->isThisDeclarationADefinition() && | ||||||
13376 | !inTemplateInstantiation() && !VD->hasAttr<SectionAttr>()) { | ||||||
13377 | if (PragmaClangBSSSection.Valid) | ||||||
13378 | VD->addAttr(PragmaClangBSSSectionAttr::CreateImplicit( | ||||||
13379 | Context, PragmaClangBSSSection.SectionName, | ||||||
13380 | PragmaClangBSSSection.PragmaLocation, | ||||||
13381 | AttributeCommonInfo::AS_Pragma)); | ||||||
13382 | if (PragmaClangDataSection.Valid) | ||||||
13383 | VD->addAttr(PragmaClangDataSectionAttr::CreateImplicit( | ||||||
13384 | Context, PragmaClangDataSection.SectionName, | ||||||
13385 | PragmaClangDataSection.PragmaLocation, | ||||||
13386 | AttributeCommonInfo::AS_Pragma)); | ||||||
13387 | if (PragmaClangRodataSection.Valid) | ||||||
13388 | VD->addAttr(PragmaClangRodataSectionAttr::CreateImplicit( | ||||||
13389 | Context, PragmaClangRodataSection.SectionName, | ||||||
13390 | PragmaClangRodataSection.PragmaLocation, | ||||||
13391 | AttributeCommonInfo::AS_Pragma)); | ||||||
13392 | if (PragmaClangRelroSection.Valid) | ||||||
13393 | VD->addAttr(PragmaClangRelroSectionAttr::CreateImplicit( | ||||||
13394 | Context, PragmaClangRelroSection.SectionName, | ||||||
13395 | PragmaClangRelroSection.PragmaLocation, | ||||||
13396 | AttributeCommonInfo::AS_Pragma)); | ||||||
13397 | } | ||||||
13398 | |||||||
13399 | if (auto *DD = dyn_cast<DecompositionDecl>(ThisDecl)) { | ||||||
13400 | for (auto *BD : DD->bindings()) { | ||||||
13401 | FinalizeDeclaration(BD); | ||||||
13402 | } | ||||||
13403 | } | ||||||
13404 | |||||||
13405 | checkAttributesAfterMerging(*this, *VD); | ||||||
13406 | |||||||
13407 | // Perform TLS alignment check here after attributes attached to the variable | ||||||
13408 | // which may affect the alignment have been processed. Only perform the check | ||||||
13409 | // if the target has a maximum TLS alignment (zero means no constraints). | ||||||
13410 | if (unsigned MaxAlign = Context.getTargetInfo().getMaxTLSAlign()) { | ||||||
13411 | // Protect the check so that it's not performed on dependent types and | ||||||
13412 | // dependent alignments (we can't determine the alignment in that case). | ||||||
13413 | if (VD->getTLSKind() && !VD->hasDependentAlignment()) { | ||||||
13414 | CharUnits MaxAlignChars = Context.toCharUnitsFromBits(MaxAlign); | ||||||
13415 | if (Context.getDeclAlign(VD) > MaxAlignChars) { | ||||||
13416 | Diag(VD->getLocation(), diag::err_tls_var_aligned_over_maximum) | ||||||
13417 | << (unsigned)Context.getDeclAlign(VD).getQuantity() << VD | ||||||
13418 | << (unsigned)MaxAlignChars.getQuantity(); | ||||||
13419 | } | ||||||
13420 | } | ||||||
13421 | } | ||||||
13422 | |||||||
13423 | if (VD->isStaticLocal()) | ||||||
13424 | CheckStaticLocalForDllExport(VD); | ||||||
13425 | |||||||
13426 | // Perform check for initializers of device-side global variables. | ||||||
13427 | // CUDA allows empty constructors as initializers (see E.2.3.1, CUDA | ||||||
13428 | // 7.5). We must also apply the same checks to all __shared__ | ||||||
13429 | // variables whether they are local or not. CUDA also allows | ||||||
13430 | // constant initializers for __constant__ and __device__ variables. | ||||||
13431 | if (getLangOpts().CUDA) | ||||||
13432 | checkAllowedCUDAInitializer(VD); | ||||||
13433 | |||||||
13434 | // Grab the dllimport or dllexport attribute off of the VarDecl. | ||||||
13435 | const InheritableAttr *DLLAttr = getDLLAttr(VD); | ||||||
13436 | |||||||
13437 | // Imported static data members cannot be defined out-of-line. | ||||||
13438 | if (const auto *IA = dyn_cast_or_null<DLLImportAttr>(DLLAttr)) { | ||||||
13439 | if (VD->isStaticDataMember() && VD->isOutOfLine() && | ||||||
13440 | VD->isThisDeclarationADefinition()) { | ||||||
13441 | // We allow definitions of dllimport class template static data members | ||||||
13442 | // with a warning. | ||||||
13443 | CXXRecordDecl *Context = | ||||||
13444 | cast<CXXRecordDecl>(VD->getFirstDecl()->getDeclContext()); | ||||||
13445 | bool IsClassTemplateMember = | ||||||
13446 | isa<ClassTemplatePartialSpecializationDecl>(Context) || | ||||||
13447 | Context->getDescribedClassTemplate(); | ||||||
13448 | |||||||
13449 | Diag(VD->getLocation(), | ||||||
13450 | IsClassTemplateMember | ||||||
13451 | ? diag::warn_attribute_dllimport_static_field_definition | ||||||
13452 | : diag::err_attribute_dllimport_static_field_definition); | ||||||
13453 | Diag(IA->getLocation(), diag::note_attribute); | ||||||
13454 | if (!IsClassTemplateMember) | ||||||
13455 | VD->setInvalidDecl(); | ||||||
13456 | } | ||||||
13457 | } | ||||||
13458 | |||||||
13459 | // dllimport/dllexport variables cannot be thread local, their TLS index | ||||||
13460 | // isn't exported with the variable. | ||||||
13461 | if (DLLAttr && VD->getTLSKind()) { | ||||||
13462 | auto *F = dyn_cast_or_null<FunctionDecl>(VD->getParentFunctionOrMethod()); | ||||||
13463 | if (F && getDLLAttr(F)) { | ||||||
13464 | assert(VD->isStaticLocal())(static_cast <bool> (VD->isStaticLocal()) ? void (0) : __assert_fail ("VD->isStaticLocal()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 13464, __extension__ __PRETTY_FUNCTION__)); | ||||||
13465 | // But if this is a static local in a dlimport/dllexport function, the | ||||||
13466 | // function will never be inlined, which means the var would never be | ||||||
13467 | // imported, so having it marked import/export is safe. | ||||||
13468 | } else { | ||||||
13469 | Diag(VD->getLocation(), diag::err_attribute_dll_thread_local) << VD | ||||||
13470 | << DLLAttr; | ||||||
13471 | VD->setInvalidDecl(); | ||||||
13472 | } | ||||||
13473 | } | ||||||
13474 | |||||||
13475 | if (UsedAttr *Attr = VD->getAttr<UsedAttr>()) { | ||||||
13476 | if (!Attr->isInherited() && !VD->isThisDeclarationADefinition()) { | ||||||
13477 | Diag(Attr->getLocation(), diag::warn_attribute_ignored_on_non_definition) | ||||||
13478 | << Attr; | ||||||
13479 | VD->dropAttr<UsedAttr>(); | ||||||
13480 | } | ||||||
13481 | } | ||||||
13482 | if (RetainAttr *Attr = VD->getAttr<RetainAttr>()) { | ||||||
13483 | if (!Attr->isInherited() && !VD->isThisDeclarationADefinition()) { | ||||||
13484 | Diag(Attr->getLocation(), diag::warn_attribute_ignored_on_non_definition) | ||||||
13485 | << Attr; | ||||||
13486 | VD->dropAttr<RetainAttr>(); | ||||||
13487 | } | ||||||
13488 | } | ||||||
13489 | |||||||
13490 | const DeclContext *DC = VD->getDeclContext(); | ||||||
13491 | // If there's a #pragma GCC visibility in scope, and this isn't a class | ||||||
13492 | // member, set the visibility of this variable. | ||||||
13493 | if (DC->getRedeclContext()->isFileContext() && VD->isExternallyVisible()) | ||||||
13494 | AddPushedVisibilityAttribute(VD); | ||||||
13495 | |||||||
13496 | // FIXME: Warn on unused var template partial specializations. | ||||||
13497 | if (VD->isFileVarDecl() && !isa<VarTemplatePartialSpecializationDecl>(VD)) | ||||||
13498 | MarkUnusedFileScopedDecl(VD); | ||||||
13499 | |||||||
13500 | // Now we have parsed the initializer and can update the table of magic | ||||||
13501 | // tag values. | ||||||
13502 | if (!VD->hasAttr<TypeTagForDatatypeAttr>() || | ||||||
13503 | !VD->getType()->isIntegralOrEnumerationType()) | ||||||
13504 | return; | ||||||
13505 | |||||||
13506 | for (const auto *I : ThisDecl->specific_attrs<TypeTagForDatatypeAttr>()) { | ||||||
13507 | const Expr *MagicValueExpr = VD->getInit(); | ||||||
13508 | if (!MagicValueExpr) { | ||||||
13509 | continue; | ||||||
13510 | } | ||||||
13511 | Optional<llvm::APSInt> MagicValueInt; | ||||||
13512 | if (!(MagicValueInt = MagicValueExpr->getIntegerConstantExpr(Context))) { | ||||||
13513 | Diag(I->getRange().getBegin(), | ||||||
13514 | diag::err_type_tag_for_datatype_not_ice) | ||||||
13515 | << LangOpts.CPlusPlus << MagicValueExpr->getSourceRange(); | ||||||
13516 | continue; | ||||||
13517 | } | ||||||
13518 | if (MagicValueInt->getActiveBits() > 64) { | ||||||
13519 | Diag(I->getRange().getBegin(), | ||||||
13520 | diag::err_type_tag_for_datatype_too_large) | ||||||
13521 | << LangOpts.CPlusPlus << MagicValueExpr->getSourceRange(); | ||||||
13522 | continue; | ||||||
13523 | } | ||||||
13524 | uint64_t MagicValue = MagicValueInt->getZExtValue(); | ||||||
13525 | RegisterTypeTagForDatatype(I->getArgumentKind(), | ||||||
13526 | MagicValue, | ||||||
13527 | I->getMatchingCType(), | ||||||
13528 | I->getLayoutCompatible(), | ||||||
13529 | I->getMustBeNull()); | ||||||
13530 | } | ||||||
13531 | } | ||||||
13532 | |||||||
13533 | static bool hasDeducedAuto(DeclaratorDecl *DD) { | ||||||
13534 | auto *VD = dyn_cast<VarDecl>(DD); | ||||||
13535 | return VD && !VD->getType()->hasAutoForTrailingReturnType(); | ||||||
13536 | } | ||||||
13537 | |||||||
13538 | Sema::DeclGroupPtrTy Sema::FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, | ||||||
13539 | ArrayRef<Decl *> Group) { | ||||||
13540 | SmallVector<Decl*, 8> Decls; | ||||||
13541 | |||||||
13542 | if (DS.isTypeSpecOwned()) | ||||||
13543 | Decls.push_back(DS.getRepAsDecl()); | ||||||
13544 | |||||||
13545 | DeclaratorDecl *FirstDeclaratorInGroup = nullptr; | ||||||
13546 | DecompositionDecl *FirstDecompDeclaratorInGroup = nullptr; | ||||||
13547 | bool DiagnosedMultipleDecomps = false; | ||||||
13548 | DeclaratorDecl *FirstNonDeducedAutoInGroup = nullptr; | ||||||
13549 | bool DiagnosedNonDeducedAuto = false; | ||||||
13550 | |||||||
13551 | for (unsigned i = 0, e = Group.size(); i != e; ++i) { | ||||||
13552 | if (Decl *D = Group[i]) { | ||||||
13553 | // For declarators, there are some additional syntactic-ish checks we need | ||||||
13554 | // to perform. | ||||||
13555 | if (auto *DD = dyn_cast<DeclaratorDecl>(D)) { | ||||||
13556 | if (!FirstDeclaratorInGroup) | ||||||
13557 | FirstDeclaratorInGroup = DD; | ||||||
13558 | if (!FirstDecompDeclaratorInGroup) | ||||||
13559 | FirstDecompDeclaratorInGroup = dyn_cast<DecompositionDecl>(D); | ||||||
13560 | if (!FirstNonDeducedAutoInGroup && DS.hasAutoTypeSpec() && | ||||||
13561 | !hasDeducedAuto(DD)) | ||||||
13562 | FirstNonDeducedAutoInGroup = DD; | ||||||
13563 | |||||||
13564 | if (FirstDeclaratorInGroup != DD) { | ||||||
13565 | // A decomposition declaration cannot be combined with any other | ||||||
13566 | // declaration in the same group. | ||||||
13567 | if (FirstDecompDeclaratorInGroup && !DiagnosedMultipleDecomps) { | ||||||
13568 | Diag(FirstDecompDeclaratorInGroup->getLocation(), | ||||||
13569 | diag::err_decomp_decl_not_alone) | ||||||
13570 | << FirstDeclaratorInGroup->getSourceRange() | ||||||
13571 | << DD->getSourceRange(); | ||||||
13572 | DiagnosedMultipleDecomps = true; | ||||||
13573 | } | ||||||
13574 | |||||||
13575 | // A declarator that uses 'auto' in any way other than to declare a | ||||||
13576 | // variable with a deduced type cannot be combined with any other | ||||||
13577 | // declarator in the same group. | ||||||
13578 | if (FirstNonDeducedAutoInGroup && !DiagnosedNonDeducedAuto) { | ||||||
13579 | Diag(FirstNonDeducedAutoInGroup->getLocation(), | ||||||
13580 | diag::err_auto_non_deduced_not_alone) | ||||||
13581 | << FirstNonDeducedAutoInGroup->getType() | ||||||
13582 | ->hasAutoForTrailingReturnType() | ||||||
13583 | << FirstDeclaratorInGroup->getSourceRange() | ||||||
13584 | << DD->getSourceRange(); | ||||||
13585 | DiagnosedNonDeducedAuto = true; | ||||||
13586 | } | ||||||
13587 | } | ||||||
13588 | } | ||||||
13589 | |||||||
13590 | Decls.push_back(D); | ||||||
13591 | } | ||||||
13592 | } | ||||||
13593 | |||||||
13594 | if (DeclSpec::isDeclRep(DS.getTypeSpecType())) { | ||||||
13595 | if (TagDecl *Tag = dyn_cast_or_null<TagDecl>(DS.getRepAsDecl())) { | ||||||
13596 | handleTagNumbering(Tag, S); | ||||||
13597 | if (FirstDeclaratorInGroup && !Tag->hasNameForLinkage() && | ||||||
13598 | getLangOpts().CPlusPlus) | ||||||
13599 | Context.addDeclaratorForUnnamedTagDecl(Tag, FirstDeclaratorInGroup); | ||||||
13600 | } | ||||||
13601 | } | ||||||
13602 | |||||||
13603 | return BuildDeclaratorGroup(Decls); | ||||||
13604 | } | ||||||
13605 | |||||||
13606 | /// BuildDeclaratorGroup - convert a list of declarations into a declaration | ||||||
13607 | /// group, performing any necessary semantic checking. | ||||||
13608 | Sema::DeclGroupPtrTy | ||||||
13609 | Sema::BuildDeclaratorGroup(MutableArrayRef<Decl *> Group) { | ||||||
13610 | // C++14 [dcl.spec.auto]p7: (DR1347) | ||||||
13611 | // If the type that replaces the placeholder type is not the same in each | ||||||
13612 | // deduction, the program is ill-formed. | ||||||
13613 | if (Group.size() > 1) { | ||||||
13614 | QualType Deduced; | ||||||
13615 | VarDecl *DeducedDecl = nullptr; | ||||||
13616 | for (unsigned i = 0, e = Group.size(); i != e; ++i) { | ||||||
13617 | VarDecl *D = dyn_cast<VarDecl>(Group[i]); | ||||||
13618 | if (!D || D->isInvalidDecl()) | ||||||
13619 | break; | ||||||
13620 | DeducedType *DT = D->getType()->getContainedDeducedType(); | ||||||
13621 | if (!DT || DT->getDeducedType().isNull()) | ||||||
13622 | continue; | ||||||
13623 | if (Deduced.isNull()) { | ||||||
13624 | Deduced = DT->getDeducedType(); | ||||||
13625 | DeducedDecl = D; | ||||||
13626 | } else if (!Context.hasSameType(DT->getDeducedType(), Deduced)) { | ||||||
13627 | auto *AT = dyn_cast<AutoType>(DT); | ||||||
13628 | auto Dia = Diag(D->getTypeSourceInfo()->getTypeLoc().getBeginLoc(), | ||||||
13629 | diag::err_auto_different_deductions) | ||||||
13630 | << (AT ? (unsigned)AT->getKeyword() : 3) << Deduced | ||||||
13631 | << DeducedDecl->getDeclName() << DT->getDeducedType() | ||||||
13632 | << D->getDeclName(); | ||||||
13633 | if (DeducedDecl->hasInit()) | ||||||
13634 | Dia << DeducedDecl->getInit()->getSourceRange(); | ||||||
13635 | if (D->getInit()) | ||||||
13636 | Dia << D->getInit()->getSourceRange(); | ||||||
13637 | D->setInvalidDecl(); | ||||||
13638 | break; | ||||||
13639 | } | ||||||
13640 | } | ||||||
13641 | } | ||||||
13642 | |||||||
13643 | ActOnDocumentableDecls(Group); | ||||||
13644 | |||||||
13645 | return DeclGroupPtrTy::make( | ||||||
13646 | DeclGroupRef::Create(Context, Group.data(), Group.size())); | ||||||
13647 | } | ||||||
13648 | |||||||
13649 | void Sema::ActOnDocumentableDecl(Decl *D) { | ||||||
13650 | ActOnDocumentableDecls(D); | ||||||
13651 | } | ||||||
13652 | |||||||
13653 | void Sema::ActOnDocumentableDecls(ArrayRef<Decl *> Group) { | ||||||
13654 | // Don't parse the comment if Doxygen diagnostics are ignored. | ||||||
13655 | if (Group.empty() || !Group[0]) | ||||||
13656 | return; | ||||||
13657 | |||||||
13658 | if (Diags.isIgnored(diag::warn_doc_param_not_found, | ||||||
13659 | Group[0]->getLocation()) && | ||||||
13660 | Diags.isIgnored(diag::warn_unknown_comment_command_name, | ||||||
13661 | Group[0]->getLocation())) | ||||||
13662 | return; | ||||||
13663 | |||||||
13664 | if (Group.size() >= 2) { | ||||||
13665 | // This is a decl group. Normally it will contain only declarations | ||||||
13666 | // produced from declarator list. But in case we have any definitions or | ||||||
13667 | // additional declaration references: | ||||||
13668 | // 'typedef struct S {} S;' | ||||||
13669 | // 'typedef struct S *S;' | ||||||
13670 | // 'struct S *pS;' | ||||||
13671 | // FinalizeDeclaratorGroup adds these as separate declarations. | ||||||
13672 | Decl *MaybeTagDecl = Group[0]; | ||||||
13673 | if (MaybeTagDecl && isa<TagDecl>(MaybeTagDecl)) { | ||||||
13674 | Group = Group.slice(1); | ||||||
13675 | } | ||||||
13676 | } | ||||||
13677 | |||||||
13678 | // FIMXE: We assume every Decl in the group is in the same file. | ||||||
13679 | // This is false when preprocessor constructs the group from decls in | ||||||
13680 | // different files (e. g. macros or #include). | ||||||
13681 | Context.attachCommentsToJustParsedDecls(Group, &getPreprocessor()); | ||||||
13682 | } | ||||||
13683 | |||||||
13684 | /// Common checks for a parameter-declaration that should apply to both function | ||||||
13685 | /// parameters and non-type template parameters. | ||||||
13686 | void Sema::CheckFunctionOrTemplateParamDeclarator(Scope *S, Declarator &D) { | ||||||
13687 | // Check that there are no default arguments inside the type of this | ||||||
13688 | // parameter. | ||||||
13689 | if (getLangOpts().CPlusPlus) | ||||||
13690 | CheckExtraCXXDefaultArguments(D); | ||||||
13691 | |||||||
13692 | // Parameter declarators cannot be qualified (C++ [dcl.meaning]p1). | ||||||
13693 | if (D.getCXXScopeSpec().isSet()) { | ||||||
13694 | Diag(D.getIdentifierLoc(), diag::err_qualified_param_declarator) | ||||||
13695 | << D.getCXXScopeSpec().getRange(); | ||||||
13696 | } | ||||||
13697 | |||||||
13698 | // [dcl.meaning]p1: An unqualified-id occurring in a declarator-id shall be a | ||||||
13699 | // simple identifier except [...irrelevant cases...]. | ||||||
13700 | switch (D.getName().getKind()) { | ||||||
13701 | case UnqualifiedIdKind::IK_Identifier: | ||||||
13702 | break; | ||||||
13703 | |||||||
13704 | case UnqualifiedIdKind::IK_OperatorFunctionId: | ||||||
13705 | case UnqualifiedIdKind::IK_ConversionFunctionId: | ||||||
13706 | case UnqualifiedIdKind::IK_LiteralOperatorId: | ||||||
13707 | case UnqualifiedIdKind::IK_ConstructorName: | ||||||
13708 | case UnqualifiedIdKind::IK_DestructorName: | ||||||
13709 | case UnqualifiedIdKind::IK_ImplicitSelfParam: | ||||||
13710 | case UnqualifiedIdKind::IK_DeductionGuideName: | ||||||
13711 | Diag(D.getIdentifierLoc(), diag::err_bad_parameter_name) | ||||||
13712 | << GetNameForDeclarator(D).getName(); | ||||||
13713 | break; | ||||||
13714 | |||||||
13715 | case UnqualifiedIdKind::IK_TemplateId: | ||||||
13716 | case UnqualifiedIdKind::IK_ConstructorTemplateId: | ||||||
13717 | // GetNameForDeclarator would not produce a useful name in this case. | ||||||
13718 | Diag(D.getIdentifierLoc(), diag::err_bad_parameter_name_template_id); | ||||||
13719 | break; | ||||||
13720 | } | ||||||
13721 | } | ||||||
13722 | |||||||
13723 | /// ActOnParamDeclarator - Called from Parser::ParseFunctionDeclarator() | ||||||
13724 | /// to introduce parameters into function prototype scope. | ||||||
13725 | Decl *Sema::ActOnParamDeclarator(Scope *S, Declarator &D) { | ||||||
13726 | const DeclSpec &DS = D.getDeclSpec(); | ||||||
13727 | |||||||
13728 | // Verify C99 6.7.5.3p2: The only SCS allowed is 'register'. | ||||||
13729 | |||||||
13730 | // C++03 [dcl.stc]p2 also permits 'auto'. | ||||||
13731 | StorageClass SC = SC_None; | ||||||
13732 | if (DS.getStorageClassSpec() == DeclSpec::SCS_register) { | ||||||
13733 | SC = SC_Register; | ||||||
13734 | // In C++11, the 'register' storage class specifier is deprecated. | ||||||
13735 | // In C++17, it is not allowed, but we tolerate it as an extension. | ||||||
13736 | if (getLangOpts().CPlusPlus11) { | ||||||
13737 | Diag(DS.getStorageClassSpecLoc(), | ||||||
13738 | getLangOpts().CPlusPlus17 ? diag::ext_register_storage_class | ||||||
13739 | : diag::warn_deprecated_register) | ||||||
13740 | << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc()); | ||||||
13741 | } | ||||||
13742 | } else if (getLangOpts().CPlusPlus && | ||||||
13743 | DS.getStorageClassSpec() == DeclSpec::SCS_auto) { | ||||||
13744 | SC = SC_Auto; | ||||||
13745 | } else if (DS.getStorageClassSpec() != DeclSpec::SCS_unspecified) { | ||||||
13746 | Diag(DS.getStorageClassSpecLoc(), | ||||||
13747 | diag::err_invalid_storage_class_in_func_decl); | ||||||
13748 | D.getMutableDeclSpec().ClearStorageClassSpecs(); | ||||||
13749 | } | ||||||
13750 | |||||||
13751 | if (DeclSpec::TSCS TSCS = DS.getThreadStorageClassSpec()) | ||||||
13752 | Diag(DS.getThreadStorageClassSpecLoc(), diag::err_invalid_thread) | ||||||
13753 | << DeclSpec::getSpecifierName(TSCS); | ||||||
13754 | if (DS.isInlineSpecified()) | ||||||
13755 | Diag(DS.getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
13756 | << getLangOpts().CPlusPlus17; | ||||||
13757 | if (DS.hasConstexprSpecifier()) | ||||||
13758 | Diag(DS.getConstexprSpecLoc(), diag::err_invalid_constexpr) | ||||||
13759 | << 0 << static_cast<int>(D.getDeclSpec().getConstexprSpecifier()); | ||||||
13760 | |||||||
13761 | DiagnoseFunctionSpecifiers(DS); | ||||||
13762 | |||||||
13763 | CheckFunctionOrTemplateParamDeclarator(S, D); | ||||||
13764 | |||||||
13765 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
13766 | QualType parmDeclType = TInfo->getType(); | ||||||
13767 | |||||||
13768 | // Check for redeclaration of parameters, e.g. int foo(int x, int x); | ||||||
13769 | IdentifierInfo *II = D.getIdentifier(); | ||||||
13770 | if (II) { | ||||||
13771 | LookupResult R(*this, II, D.getIdentifierLoc(), LookupOrdinaryName, | ||||||
13772 | ForVisibleRedeclaration); | ||||||
13773 | LookupName(R, S); | ||||||
13774 | if (R.isSingleResult()) { | ||||||
13775 | NamedDecl *PrevDecl = R.getFoundDecl(); | ||||||
13776 | if (PrevDecl->isTemplateParameter()) { | ||||||
13777 | // Maybe we will complain about the shadowed template parameter. | ||||||
13778 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||
13779 | // Just pretend that we didn't see the previous declaration. | ||||||
13780 | PrevDecl = nullptr; | ||||||
13781 | } else if (S->isDeclScope(PrevDecl)) { | ||||||
13782 | Diag(D.getIdentifierLoc(), diag::err_param_redefinition) << II; | ||||||
13783 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
13784 | |||||||
13785 | // Recover by removing the name | ||||||
13786 | II = nullptr; | ||||||
13787 | D.SetIdentifier(nullptr, D.getIdentifierLoc()); | ||||||
13788 | D.setInvalidType(true); | ||||||
13789 | } | ||||||
13790 | } | ||||||
13791 | } | ||||||
13792 | |||||||
13793 | // Temporarily put parameter variables in the translation unit, not | ||||||
13794 | // the enclosing context. This prevents them from accidentally | ||||||
13795 | // looking like class members in C++. | ||||||
13796 | ParmVarDecl *New = | ||||||
13797 | CheckParameter(Context.getTranslationUnitDecl(), D.getBeginLoc(), | ||||||
13798 | D.getIdentifierLoc(), II, parmDeclType, TInfo, SC); | ||||||
13799 | |||||||
13800 | if (D.isInvalidType()) | ||||||
13801 | New->setInvalidDecl(); | ||||||
13802 | |||||||
13803 | assert(S->isFunctionPrototypeScope())(static_cast <bool> (S->isFunctionPrototypeScope()) ? void (0) : __assert_fail ("S->isFunctionPrototypeScope()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 13803, __extension__ __PRETTY_FUNCTION__)); | ||||||
13804 | assert(S->getFunctionPrototypeDepth() >= 1)(static_cast <bool> (S->getFunctionPrototypeDepth() >= 1) ? void (0) : __assert_fail ("S->getFunctionPrototypeDepth() >= 1" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 13804, __extension__ __PRETTY_FUNCTION__)); | ||||||
13805 | New->setScopeInfo(S->getFunctionPrototypeDepth() - 1, | ||||||
13806 | S->getNextFunctionPrototypeIndex()); | ||||||
13807 | |||||||
13808 | // Add the parameter declaration into this scope. | ||||||
13809 | S->AddDecl(New); | ||||||
13810 | if (II) | ||||||
13811 | IdResolver.AddDecl(New); | ||||||
13812 | |||||||
13813 | ProcessDeclAttributes(S, New, D); | ||||||
13814 | |||||||
13815 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
13816 | Diag(New->getLocation(), diag::err_module_private_local) | ||||||
13817 | << 1 << New << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
13818 | << FixItHint::CreateRemoval(D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
13819 | |||||||
13820 | if (New->hasAttr<BlocksAttr>()) { | ||||||
13821 | Diag(New->getLocation(), diag::err_block_on_nonlocal); | ||||||
13822 | } | ||||||
13823 | |||||||
13824 | if (getLangOpts().OpenCL) | ||||||
13825 | deduceOpenCLAddressSpace(New); | ||||||
13826 | |||||||
13827 | return New; | ||||||
13828 | } | ||||||
13829 | |||||||
13830 | /// Synthesizes a variable for a parameter arising from a | ||||||
13831 | /// typedef. | ||||||
13832 | ParmVarDecl *Sema::BuildParmVarDeclForTypedef(DeclContext *DC, | ||||||
13833 | SourceLocation Loc, | ||||||
13834 | QualType T) { | ||||||
13835 | /* FIXME: setting StartLoc == Loc. | ||||||
13836 | Would it be worth to modify callers so as to provide proper source | ||||||
13837 | location for the unnamed parameters, embedding the parameter's type? */ | ||||||
13838 | ParmVarDecl *Param = ParmVarDecl::Create(Context, DC, Loc, Loc, nullptr, | ||||||
13839 | T, Context.getTrivialTypeSourceInfo(T, Loc), | ||||||
13840 | SC_None, nullptr); | ||||||
13841 | Param->setImplicit(); | ||||||
13842 | return Param; | ||||||
13843 | } | ||||||
13844 | |||||||
13845 | void Sema::DiagnoseUnusedParameters(ArrayRef<ParmVarDecl *> Parameters) { | ||||||
13846 | // Don't diagnose unused-parameter errors in template instantiations; we | ||||||
13847 | // will already have done so in the template itself. | ||||||
13848 | if (inTemplateInstantiation()) | ||||||
13849 | return; | ||||||
13850 | |||||||
13851 | for (const ParmVarDecl *Parameter : Parameters) { | ||||||
13852 | if (!Parameter->isReferenced() && Parameter->getDeclName() && | ||||||
13853 | !Parameter->hasAttr<UnusedAttr>()) { | ||||||
13854 | Diag(Parameter->getLocation(), diag::warn_unused_parameter) | ||||||
13855 | << Parameter->getDeclName(); | ||||||
13856 | } | ||||||
13857 | } | ||||||
13858 | } | ||||||
13859 | |||||||
13860 | void Sema::DiagnoseSizeOfParametersAndReturnValue( | ||||||
13861 | ArrayRef<ParmVarDecl *> Parameters, QualType ReturnTy, NamedDecl *D) { | ||||||
13862 | if (LangOpts.NumLargeByValueCopy == 0) // No check. | ||||||
13863 | return; | ||||||
13864 | |||||||
13865 | // Warn if the return value is pass-by-value and larger than the specified | ||||||
13866 | // threshold. | ||||||
13867 | if (!ReturnTy->isDependentType() && ReturnTy.isPODType(Context)) { | ||||||
13868 | unsigned Size = Context.getTypeSizeInChars(ReturnTy).getQuantity(); | ||||||
13869 | if (Size > LangOpts.NumLargeByValueCopy) | ||||||
13870 | Diag(D->getLocation(), diag::warn_return_value_size) << D << Size; | ||||||
13871 | } | ||||||
13872 | |||||||
13873 | // Warn if any parameter is pass-by-value and larger than the specified | ||||||
13874 | // threshold. | ||||||
13875 | for (const ParmVarDecl *Parameter : Parameters) { | ||||||
13876 | QualType T = Parameter->getType(); | ||||||
13877 | if (T->isDependentType() || !T.isPODType(Context)) | ||||||
13878 | continue; | ||||||
13879 | unsigned Size = Context.getTypeSizeInChars(T).getQuantity(); | ||||||
13880 | if (Size > LangOpts.NumLargeByValueCopy) | ||||||
13881 | Diag(Parameter->getLocation(), diag::warn_parameter_size) | ||||||
13882 | << Parameter << Size; | ||||||
13883 | } | ||||||
13884 | } | ||||||
13885 | |||||||
13886 | ParmVarDecl *Sema::CheckParameter(DeclContext *DC, SourceLocation StartLoc, | ||||||
13887 | SourceLocation NameLoc, IdentifierInfo *Name, | ||||||
13888 | QualType T, TypeSourceInfo *TSInfo, | ||||||
13889 | StorageClass SC) { | ||||||
13890 | // In ARC, infer a lifetime qualifier for appropriate parameter types. | ||||||
13891 | if (getLangOpts().ObjCAutoRefCount && | ||||||
13892 | T.getObjCLifetime() == Qualifiers::OCL_None && | ||||||
13893 | T->isObjCLifetimeType()) { | ||||||
13894 | |||||||
13895 | Qualifiers::ObjCLifetime lifetime; | ||||||
13896 | |||||||
13897 | // Special cases for arrays: | ||||||
13898 | // - if it's const, use __unsafe_unretained | ||||||
13899 | // - otherwise, it's an error | ||||||
13900 | if (T->isArrayType()) { | ||||||
13901 | if (!T.isConstQualified()) { | ||||||
13902 | if (DelayedDiagnostics.shouldDelayDiagnostics()) | ||||||
13903 | DelayedDiagnostics.add( | ||||||
13904 | sema::DelayedDiagnostic::makeForbiddenType( | ||||||
13905 | NameLoc, diag::err_arc_array_param_no_ownership, T, false)); | ||||||
13906 | else | ||||||
13907 | Diag(NameLoc, diag::err_arc_array_param_no_ownership) | ||||||
13908 | << TSInfo->getTypeLoc().getSourceRange(); | ||||||
13909 | } | ||||||
13910 | lifetime = Qualifiers::OCL_ExplicitNone; | ||||||
13911 | } else { | ||||||
13912 | lifetime = T->getObjCARCImplicitLifetime(); | ||||||
13913 | } | ||||||
13914 | T = Context.getLifetimeQualifiedType(T, lifetime); | ||||||
13915 | } | ||||||
13916 | |||||||
13917 | ParmVarDecl *New = ParmVarDecl::Create(Context, DC, StartLoc, NameLoc, Name, | ||||||
13918 | Context.getAdjustedParameterType(T), | ||||||
13919 | TSInfo, SC, nullptr); | ||||||
13920 | |||||||
13921 | // Make a note if we created a new pack in the scope of a lambda, so that | ||||||
13922 | // we know that references to that pack must also be expanded within the | ||||||
13923 | // lambda scope. | ||||||
13924 | if (New->isParameterPack()) | ||||||
13925 | if (auto *LSI = getEnclosingLambda()) | ||||||
13926 | LSI->LocalPacks.push_back(New); | ||||||
13927 | |||||||
13928 | if (New->getType().hasNonTrivialToPrimitiveDestructCUnion() || | ||||||
13929 | New->getType().hasNonTrivialToPrimitiveCopyCUnion()) | ||||||
13930 | checkNonTrivialCUnion(New->getType(), New->getLocation(), | ||||||
13931 | NTCUC_FunctionParam, NTCUK_Destruct|NTCUK_Copy); | ||||||
13932 | |||||||
13933 | // Parameters can not be abstract class types. | ||||||
13934 | // For record types, this is done by the AbstractClassUsageDiagnoser once | ||||||
13935 | // the class has been completely parsed. | ||||||
13936 | if (!CurContext->isRecord() && | ||||||
13937 | RequireNonAbstractType(NameLoc, T, diag::err_abstract_type_in_decl, | ||||||
13938 | AbstractParamType)) | ||||||
13939 | New->setInvalidDecl(); | ||||||
13940 | |||||||
13941 | // Parameter declarators cannot be interface types. All ObjC objects are | ||||||
13942 | // passed by reference. | ||||||
13943 | if (T->isObjCObjectType()) { | ||||||
13944 | SourceLocation TypeEndLoc = | ||||||
13945 | getLocForEndOfToken(TSInfo->getTypeLoc().getEndLoc()); | ||||||
13946 | Diag(NameLoc, | ||||||
13947 | diag::err_object_cannot_be_passed_returned_by_value) << 1 << T | ||||||
13948 | << FixItHint::CreateInsertion(TypeEndLoc, "*"); | ||||||
13949 | T = Context.getObjCObjectPointerType(T); | ||||||
13950 | New->setType(T); | ||||||
13951 | } | ||||||
13952 | |||||||
13953 | // ISO/IEC TR 18037 S6.7.3: "The type of an object with automatic storage | ||||||
13954 | // duration shall not be qualified by an address-space qualifier." | ||||||
13955 | // Since all parameters have automatic store duration, they can not have | ||||||
13956 | // an address space. | ||||||
13957 | if (T.getAddressSpace() != LangAS::Default && | ||||||
13958 | // OpenCL allows function arguments declared to be an array of a type | ||||||
13959 | // to be qualified with an address space. | ||||||
13960 | !(getLangOpts().OpenCL && | ||||||
13961 | (T->isArrayType() || T.getAddressSpace() == LangAS::opencl_private))) { | ||||||
13962 | Diag(NameLoc, diag::err_arg_with_address_space); | ||||||
13963 | New->setInvalidDecl(); | ||||||
13964 | } | ||||||
13965 | |||||||
13966 | // PPC MMA non-pointer types are not allowed as function argument types. | ||||||
13967 | if (Context.getTargetInfo().getTriple().isPPC64() && | ||||||
13968 | CheckPPCMMAType(New->getOriginalType(), New->getLocation())) { | ||||||
13969 | New->setInvalidDecl(); | ||||||
13970 | } | ||||||
13971 | |||||||
13972 | return New; | ||||||
13973 | } | ||||||
13974 | |||||||
13975 | void Sema::ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, | ||||||
13976 | SourceLocation LocAfterDecls) { | ||||||
13977 | DeclaratorChunk::FunctionTypeInfo &FTI = D.getFunctionTypeInfo(); | ||||||
13978 | |||||||
13979 | // Verify 6.9.1p6: 'every identifier in the identifier list shall be declared' | ||||||
13980 | // for a K&R function. | ||||||
13981 | if (!FTI.hasPrototype) { | ||||||
13982 | for (int i = FTI.NumParams; i != 0; /* decrement in loop */) { | ||||||
13983 | --i; | ||||||
13984 | if (FTI.Params[i].Param == nullptr) { | ||||||
13985 | SmallString<256> Code; | ||||||
13986 | llvm::raw_svector_ostream(Code) | ||||||
13987 | << " int " << FTI.Params[i].Ident->getName() << ";\n"; | ||||||
13988 | Diag(FTI.Params[i].IdentLoc, diag::ext_param_not_declared) | ||||||
13989 | << FTI.Params[i].Ident | ||||||
13990 | << FixItHint::CreateInsertion(LocAfterDecls, Code); | ||||||
13991 | |||||||
13992 | // Implicitly declare the argument as type 'int' for lack of a better | ||||||
13993 | // type. | ||||||
13994 | AttributeFactory attrs; | ||||||
13995 | DeclSpec DS(attrs); | ||||||
13996 | const char* PrevSpec; // unused | ||||||
13997 | unsigned DiagID; // unused | ||||||
13998 | DS.SetTypeSpecType(DeclSpec::TST_int, FTI.Params[i].IdentLoc, PrevSpec, | ||||||
13999 | DiagID, Context.getPrintingPolicy()); | ||||||
14000 | // Use the identifier location for the type source range. | ||||||
14001 | DS.SetRangeStart(FTI.Params[i].IdentLoc); | ||||||
14002 | DS.SetRangeEnd(FTI.Params[i].IdentLoc); | ||||||
14003 | Declarator ParamD(DS, DeclaratorContext::KNRTypeList); | ||||||
14004 | ParamD.SetIdentifier(FTI.Params[i].Ident, FTI.Params[i].IdentLoc); | ||||||
14005 | FTI.Params[i].Param = ActOnParamDeclarator(S, ParamD); | ||||||
14006 | } | ||||||
14007 | } | ||||||
14008 | } | ||||||
14009 | } | ||||||
14010 | |||||||
14011 | Decl * | ||||||
14012 | Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Declarator &D, | ||||||
14013 | MultiTemplateParamsArg TemplateParameterLists, | ||||||
14014 | SkipBodyInfo *SkipBody) { | ||||||
14015 | assert(getCurFunctionDecl() == nullptr && "Function parsing confused")(static_cast <bool> (getCurFunctionDecl() == nullptr && "Function parsing confused") ? void (0) : __assert_fail ("getCurFunctionDecl() == nullptr && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14015, __extension__ __PRETTY_FUNCTION__)); | ||||||
14016 | assert(D.isFunctionDeclarator() && "Not a function declarator!")(static_cast <bool> (D.isFunctionDeclarator() && "Not a function declarator!") ? void (0) : __assert_fail ("D.isFunctionDeclarator() && \"Not a function declarator!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14016, __extension__ __PRETTY_FUNCTION__)); | ||||||
14017 | Scope *ParentScope = FnBodyScope->getParent(); | ||||||
14018 | |||||||
14019 | // Check if we are in an `omp begin/end declare variant` scope. If we are, and | ||||||
14020 | // we define a non-templated function definition, we will create a declaration | ||||||
14021 | // instead (=BaseFD), and emit the definition with a mangled name afterwards. | ||||||
14022 | // The base function declaration will have the equivalent of an `omp declare | ||||||
14023 | // variant` annotation which specifies the mangled definition as a | ||||||
14024 | // specialization function under the OpenMP context defined as part of the | ||||||
14025 | // `omp begin declare variant`. | ||||||
14026 | SmallVector<FunctionDecl *, 4> Bases; | ||||||
14027 | if (LangOpts.OpenMP && isInOpenMPDeclareVariantScope()) | ||||||
14028 | ActOnStartOfFunctionDefinitionInOpenMPDeclareVariantScope( | ||||||
14029 | ParentScope, D, TemplateParameterLists, Bases); | ||||||
14030 | |||||||
14031 | D.setFunctionDefinitionKind(FunctionDefinitionKind::Definition); | ||||||
14032 | Decl *DP = HandleDeclarator(ParentScope, D, TemplateParameterLists); | ||||||
14033 | Decl *Dcl = ActOnStartOfFunctionDef(FnBodyScope, DP, SkipBody); | ||||||
14034 | |||||||
14035 | if (!Bases.empty()) | ||||||
14036 | ActOnFinishedFunctionDefinitionInOpenMPDeclareVariantScope(Dcl, Bases); | ||||||
14037 | |||||||
14038 | return Dcl; | ||||||
14039 | } | ||||||
14040 | |||||||
14041 | void Sema::ActOnFinishInlineFunctionDef(FunctionDecl *D) { | ||||||
14042 | Consumer.HandleInlineFunctionDefinition(D); | ||||||
14043 | } | ||||||
14044 | |||||||
14045 | static bool | ||||||
14046 | ShouldWarnAboutMissingPrototype(const FunctionDecl *FD, | ||||||
14047 | const FunctionDecl *&PossiblePrototype) { | ||||||
14048 | // Don't warn about invalid declarations. | ||||||
14049 | if (FD->isInvalidDecl()) | ||||||
14050 | return false; | ||||||
14051 | |||||||
14052 | // Or declarations that aren't global. | ||||||
14053 | if (!FD->isGlobal()) | ||||||
14054 | return false; | ||||||
14055 | |||||||
14056 | // Don't warn about C++ member functions. | ||||||
14057 | if (isa<CXXMethodDecl>(FD)) | ||||||
14058 | return false; | ||||||
14059 | |||||||
14060 | // Don't warn about 'main'. | ||||||
14061 | if (isa<TranslationUnitDecl>(FD->getDeclContext()->getRedeclContext())) | ||||||
14062 | if (IdentifierInfo *II = FD->getIdentifier()) | ||||||
14063 | if (II->isStr("main") || II->isStr("efi_main")) | ||||||
14064 | return false; | ||||||
14065 | |||||||
14066 | // Don't warn about inline functions. | ||||||
14067 | if (FD->isInlined()) | ||||||
14068 | return false; | ||||||
14069 | |||||||
14070 | // Don't warn about function templates. | ||||||
14071 | if (FD->getDescribedFunctionTemplate()) | ||||||
14072 | return false; | ||||||
14073 | |||||||
14074 | // Don't warn about function template specializations. | ||||||
14075 | if (FD->isFunctionTemplateSpecialization()) | ||||||
14076 | return false; | ||||||
14077 | |||||||
14078 | // Don't warn for OpenCL kernels. | ||||||
14079 | if (FD->hasAttr<OpenCLKernelAttr>()) | ||||||
14080 | return false; | ||||||
14081 | |||||||
14082 | // Don't warn on explicitly deleted functions. | ||||||
14083 | if (FD->isDeleted()) | ||||||
14084 | return false; | ||||||
14085 | |||||||
14086 | for (const FunctionDecl *Prev = FD->getPreviousDecl(); | ||||||
14087 | Prev; Prev = Prev->getPreviousDecl()) { | ||||||
14088 | // Ignore any declarations that occur in function or method | ||||||
14089 | // scope, because they aren't visible from the header. | ||||||
14090 | if (Prev->getLexicalDeclContext()->isFunctionOrMethod()) | ||||||
14091 | continue; | ||||||
14092 | |||||||
14093 | PossiblePrototype = Prev; | ||||||
14094 | return Prev->getType()->isFunctionNoProtoType(); | ||||||
14095 | } | ||||||
14096 | |||||||
14097 | return true; | ||||||
14098 | } | ||||||
14099 | |||||||
14100 | void | ||||||
14101 | Sema::CheckForFunctionRedefinition(FunctionDecl *FD, | ||||||
14102 | const FunctionDecl *EffectiveDefinition, | ||||||
14103 | SkipBodyInfo *SkipBody) { | ||||||
14104 | const FunctionDecl *Definition = EffectiveDefinition; | ||||||
14105 | if (!Definition && | ||||||
14106 | !FD->isDefined(Definition, /*CheckForPendingFriendDefinition*/ true)) | ||||||
14107 | return; | ||||||
14108 | |||||||
14109 | if (Definition->getFriendObjectKind() != Decl::FOK_None) { | ||||||
14110 | if (FunctionDecl *OrigDef = Definition->getInstantiatedFromMemberFunction()) { | ||||||
14111 | if (FunctionDecl *OrigFD = FD->getInstantiatedFromMemberFunction()) { | ||||||
14112 | // A merged copy of the same function, instantiated as a member of | ||||||
14113 | // the same class, is OK. | ||||||
14114 | if (declaresSameEntity(OrigFD, OrigDef) && | ||||||
14115 | declaresSameEntity(cast<Decl>(Definition->getLexicalDeclContext()), | ||||||
14116 | cast<Decl>(FD->getLexicalDeclContext()))) | ||||||
14117 | return; | ||||||
14118 | } | ||||||
14119 | } | ||||||
14120 | } | ||||||
14121 | |||||||
14122 | if (canRedefineFunction(Definition, getLangOpts())) | ||||||
14123 | return; | ||||||
14124 | |||||||
14125 | // Don't emit an error when this is redefinition of a typo-corrected | ||||||
14126 | // definition. | ||||||
14127 | if (TypoCorrectedFunctionDefinitions.count(Definition)) | ||||||
14128 | return; | ||||||
14129 | |||||||
14130 | // If we don't have a visible definition of the function, and it's inline or | ||||||
14131 | // a template, skip the new definition. | ||||||
14132 | if (SkipBody && !hasVisibleDefinition(Definition) && | ||||||
14133 | (Definition->getFormalLinkage() == InternalLinkage || | ||||||
14134 | Definition->isInlined() || | ||||||
14135 | Definition->getDescribedFunctionTemplate() || | ||||||
14136 | Definition->getNumTemplateParameterLists())) { | ||||||
14137 | SkipBody->ShouldSkip = true; | ||||||
14138 | SkipBody->Previous = const_cast<FunctionDecl*>(Definition); | ||||||
14139 | if (auto *TD = Definition->getDescribedFunctionTemplate()) | ||||||
14140 | makeMergedDefinitionVisible(TD); | ||||||
14141 | makeMergedDefinitionVisible(const_cast<FunctionDecl*>(Definition)); | ||||||
14142 | return; | ||||||
14143 | } | ||||||
14144 | |||||||
14145 | if (getLangOpts().GNUMode && Definition->isInlineSpecified() && | ||||||
14146 | Definition->getStorageClass() == SC_Extern) | ||||||
14147 | Diag(FD->getLocation(), diag::err_redefinition_extern_inline) | ||||||
14148 | << FD << getLangOpts().CPlusPlus; | ||||||
14149 | else | ||||||
14150 | Diag(FD->getLocation(), diag::err_redefinition) << FD; | ||||||
14151 | |||||||
14152 | Diag(Definition->getLocation(), diag::note_previous_definition); | ||||||
14153 | FD->setInvalidDecl(); | ||||||
14154 | } | ||||||
14155 | |||||||
14156 | static void RebuildLambdaScopeInfo(CXXMethodDecl *CallOperator, | ||||||
14157 | Sema &S) { | ||||||
14158 | CXXRecordDecl *const LambdaClass = CallOperator->getParent(); | ||||||
14159 | |||||||
14160 | LambdaScopeInfo *LSI = S.PushLambdaScope(); | ||||||
14161 | LSI->CallOperator = CallOperator; | ||||||
14162 | LSI->Lambda = LambdaClass; | ||||||
14163 | LSI->ReturnType = CallOperator->getReturnType(); | ||||||
14164 | const LambdaCaptureDefault LCD = LambdaClass->getLambdaCaptureDefault(); | ||||||
14165 | |||||||
14166 | if (LCD == LCD_None) | ||||||
14167 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_None; | ||||||
14168 | else if (LCD == LCD_ByCopy) | ||||||
14169 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_LambdaByval; | ||||||
14170 | else if (LCD == LCD_ByRef) | ||||||
14171 | LSI->ImpCaptureStyle = CapturingScopeInfo::ImpCap_LambdaByref; | ||||||
14172 | DeclarationNameInfo DNI = CallOperator->getNameInfo(); | ||||||
14173 | |||||||
14174 | LSI->IntroducerRange = DNI.getCXXOperatorNameRange(); | ||||||
14175 | LSI->Mutable = !CallOperator->isConst(); | ||||||
14176 | |||||||
14177 | // Add the captures to the LSI so they can be noted as already | ||||||
14178 | // captured within tryCaptureVar. | ||||||
14179 | auto I = LambdaClass->field_begin(); | ||||||
14180 | for (const auto &C : LambdaClass->captures()) { | ||||||
14181 | if (C.capturesVariable()) { | ||||||
14182 | VarDecl *VD = C.getCapturedVar(); | ||||||
14183 | if (VD->isInitCapture()) | ||||||
14184 | S.CurrentInstantiationScope->InstantiatedLocal(VD, VD); | ||||||
14185 | const bool ByRef = C.getCaptureKind() == LCK_ByRef; | ||||||
14186 | LSI->addCapture(VD, /*IsBlock*/false, ByRef, | ||||||
14187 | /*RefersToEnclosingVariableOrCapture*/true, C.getLocation(), | ||||||
14188 | /*EllipsisLoc*/C.isPackExpansion() | ||||||
14189 | ? C.getEllipsisLoc() : SourceLocation(), | ||||||
14190 | I->getType(), /*Invalid*/false); | ||||||
14191 | |||||||
14192 | } else if (C.capturesThis()) { | ||||||
14193 | LSI->addThisCapture(/*Nested*/ false, C.getLocation(), I->getType(), | ||||||
14194 | C.getCaptureKind() == LCK_StarThis); | ||||||
14195 | } else { | ||||||
14196 | LSI->addVLATypeCapture(C.getLocation(), I->getCapturedVLAType(), | ||||||
14197 | I->getType()); | ||||||
14198 | } | ||||||
14199 | ++I; | ||||||
14200 | } | ||||||
14201 | } | ||||||
14202 | |||||||
14203 | Decl *Sema::ActOnStartOfFunctionDef(Scope *FnBodyScope, Decl *D, | ||||||
14204 | SkipBodyInfo *SkipBody) { | ||||||
14205 | if (!D) { | ||||||
14206 | // Parsing the function declaration failed in some way. Push on a fake scope | ||||||
14207 | // anyway so we can try to parse the function body. | ||||||
14208 | PushFunctionScope(); | ||||||
14209 | PushExpressionEvaluationContext(ExprEvalContexts.back().Context); | ||||||
14210 | return D; | ||||||
14211 | } | ||||||
14212 | |||||||
14213 | FunctionDecl *FD = nullptr; | ||||||
14214 | |||||||
14215 | if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) | ||||||
14216 | FD = FunTmpl->getTemplatedDecl(); | ||||||
14217 | else | ||||||
14218 | FD = cast<FunctionDecl>(D); | ||||||
14219 | |||||||
14220 | // Do not push if it is a lambda because one is already pushed when building | ||||||
14221 | // the lambda in ActOnStartOfLambdaDefinition(). | ||||||
14222 | if (!isLambdaCallOperator(FD)) | ||||||
14223 | PushExpressionEvaluationContext( | ||||||
14224 | FD->isConsteval() ? ExpressionEvaluationContext::ConstantEvaluated | ||||||
14225 | : ExprEvalContexts.back().Context); | ||||||
14226 | |||||||
14227 | // Check for defining attributes before the check for redefinition. | ||||||
14228 | if (const auto *Attr = FD->getAttr<AliasAttr>()) { | ||||||
14229 | Diag(Attr->getLocation(), diag::err_alias_is_definition) << FD << 0; | ||||||
14230 | FD->dropAttr<AliasAttr>(); | ||||||
14231 | FD->setInvalidDecl(); | ||||||
14232 | } | ||||||
14233 | if (const auto *Attr = FD->getAttr<IFuncAttr>()) { | ||||||
14234 | Diag(Attr->getLocation(), diag::err_alias_is_definition) << FD << 1; | ||||||
14235 | FD->dropAttr<IFuncAttr>(); | ||||||
14236 | FD->setInvalidDecl(); | ||||||
14237 | } | ||||||
14238 | |||||||
14239 | if (auto *Ctor = dyn_cast<CXXConstructorDecl>(FD)) { | ||||||
14240 | if (Ctor->getTemplateSpecializationKind() == TSK_ExplicitSpecialization && | ||||||
14241 | Ctor->isDefaultConstructor() && | ||||||
14242 | Context.getTargetInfo().getCXXABI().isMicrosoft()) { | ||||||
14243 | // If this is an MS ABI dllexport default constructor, instantiate any | ||||||
14244 | // default arguments. | ||||||
14245 | InstantiateDefaultCtorDefaultArgs(Ctor); | ||||||
14246 | } | ||||||
14247 | } | ||||||
14248 | |||||||
14249 | // See if this is a redefinition. If 'will have body' (or similar) is already | ||||||
14250 | // set, then these checks were already performed when it was set. | ||||||
14251 | if (!FD->willHaveBody() && !FD->isLateTemplateParsed() && | ||||||
14252 | !FD->isThisDeclarationInstantiatedFromAFriendDefinition()) { | ||||||
14253 | CheckForFunctionRedefinition(FD, nullptr, SkipBody); | ||||||
14254 | |||||||
14255 | // If we're skipping the body, we're done. Don't enter the scope. | ||||||
14256 | if (SkipBody && SkipBody->ShouldSkip) | ||||||
14257 | return D; | ||||||
14258 | } | ||||||
14259 | |||||||
14260 | // Mark this function as "will have a body eventually". This lets users to | ||||||
14261 | // call e.g. isInlineDefinitionExternallyVisible while we're still parsing | ||||||
14262 | // this function. | ||||||
14263 | FD->setWillHaveBody(); | ||||||
14264 | |||||||
14265 | // If we are instantiating a generic lambda call operator, push | ||||||
14266 | // a LambdaScopeInfo onto the function stack. But use the information | ||||||
14267 | // that's already been calculated (ActOnLambdaExpr) to prime the current | ||||||
14268 | // LambdaScopeInfo. | ||||||
14269 | // When the template operator is being specialized, the LambdaScopeInfo, | ||||||
14270 | // has to be properly restored so that tryCaptureVariable doesn't try | ||||||
14271 | // and capture any new variables. In addition when calculating potential | ||||||
14272 | // captures during transformation of nested lambdas, it is necessary to | ||||||
14273 | // have the LSI properly restored. | ||||||
14274 | if (isGenericLambdaCallOperatorSpecialization(FD)) { | ||||||
14275 | assert(inTemplateInstantiation() &&(static_cast <bool> (inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? void (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14277, __extension__ __PRETTY_FUNCTION__)) | ||||||
14276 | "There should be an active template instantiation on the stack "(static_cast <bool> (inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? void (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14277, __extension__ __PRETTY_FUNCTION__)) | ||||||
14277 | "when instantiating a generic lambda!")(static_cast <bool> (inTemplateInstantiation() && "There should be an active template instantiation on the stack " "when instantiating a generic lambda!") ? void (0) : __assert_fail ("inTemplateInstantiation() && \"There should be an active template instantiation on the stack \" \"when instantiating a generic lambda!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14277, __extension__ __PRETTY_FUNCTION__)); | ||||||
14278 | RebuildLambdaScopeInfo(cast<CXXMethodDecl>(D), *this); | ||||||
14279 | } else { | ||||||
14280 | // Enter a new function scope | ||||||
14281 | PushFunctionScope(); | ||||||
14282 | } | ||||||
14283 | |||||||
14284 | // Builtin functions cannot be defined. | ||||||
14285 | if (unsigned BuiltinID = FD->getBuiltinID()) { | ||||||
14286 | if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID) && | ||||||
14287 | !Context.BuiltinInfo.isPredefinedRuntimeFunction(BuiltinID)) { | ||||||
14288 | Diag(FD->getLocation(), diag::err_builtin_definition) << FD; | ||||||
14289 | FD->setInvalidDecl(); | ||||||
14290 | } | ||||||
14291 | } | ||||||
14292 | |||||||
14293 | // The return type of a function definition must be complete | ||||||
14294 | // (C99 6.9.1p3, C++ [dcl.fct]p6). | ||||||
14295 | QualType ResultType = FD->getReturnType(); | ||||||
14296 | if (!ResultType->isDependentType() && !ResultType->isVoidType() && | ||||||
14297 | !FD->isInvalidDecl() && | ||||||
14298 | RequireCompleteType(FD->getLocation(), ResultType, | ||||||
14299 | diag::err_func_def_incomplete_result)) | ||||||
14300 | FD->setInvalidDecl(); | ||||||
14301 | |||||||
14302 | if (FnBodyScope) | ||||||
14303 | PushDeclContext(FnBodyScope, FD); | ||||||
14304 | |||||||
14305 | // Check the validity of our function parameters | ||||||
14306 | CheckParmsForFunctionDef(FD->parameters(), | ||||||
14307 | /*CheckParameterNames=*/true); | ||||||
14308 | |||||||
14309 | // Add non-parameter declarations already in the function to the current | ||||||
14310 | // scope. | ||||||
14311 | if (FnBodyScope) { | ||||||
14312 | for (Decl *NPD : FD->decls()) { | ||||||
14313 | auto *NonParmDecl = dyn_cast<NamedDecl>(NPD); | ||||||
14314 | if (!NonParmDecl) | ||||||
14315 | continue; | ||||||
14316 | assert(!isa<ParmVarDecl>(NonParmDecl) &&(static_cast <bool> (!isa<ParmVarDecl>(NonParmDecl ) && "parameters should not be in newly created FD yet" ) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(NonParmDecl) && \"parameters should not be in newly created FD yet\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14317, __extension__ __PRETTY_FUNCTION__)) | ||||||
14317 | "parameters should not be in newly created FD yet")(static_cast <bool> (!isa<ParmVarDecl>(NonParmDecl ) && "parameters should not be in newly created FD yet" ) ? void (0) : __assert_fail ("!isa<ParmVarDecl>(NonParmDecl) && \"parameters should not be in newly created FD yet\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14317, __extension__ __PRETTY_FUNCTION__)); | ||||||
14318 | |||||||
14319 | // If the decl has a name, make it accessible in the current scope. | ||||||
14320 | if (NonParmDecl->getDeclName()) | ||||||
14321 | PushOnScopeChains(NonParmDecl, FnBodyScope, /*AddToContext=*/false); | ||||||
14322 | |||||||
14323 | // Similarly, dive into enums and fish their constants out, making them | ||||||
14324 | // accessible in this scope. | ||||||
14325 | if (auto *ED = dyn_cast<EnumDecl>(NonParmDecl)) { | ||||||
14326 | for (auto *EI : ED->enumerators()) | ||||||
14327 | PushOnScopeChains(EI, FnBodyScope, /*AddToContext=*/false); | ||||||
14328 | } | ||||||
14329 | } | ||||||
14330 | } | ||||||
14331 | |||||||
14332 | // Introduce our parameters into the function scope | ||||||
14333 | for (auto Param : FD->parameters()) { | ||||||
14334 | Param->setOwningFunction(FD); | ||||||
14335 | |||||||
14336 | // If this has an identifier, add it to the scope stack. | ||||||
14337 | if (Param->getIdentifier() && FnBodyScope) { | ||||||
14338 | CheckShadow(FnBodyScope, Param); | ||||||
14339 | |||||||
14340 | PushOnScopeChains(Param, FnBodyScope); | ||||||
14341 | } | ||||||
14342 | } | ||||||
14343 | |||||||
14344 | // Ensure that the function's exception specification is instantiated. | ||||||
14345 | if (const FunctionProtoType *FPT = FD->getType()->getAs<FunctionProtoType>()) | ||||||
14346 | ResolveExceptionSpec(D->getLocation(), FPT); | ||||||
14347 | |||||||
14348 | // dllimport cannot be applied to non-inline function definitions. | ||||||
14349 | if (FD->hasAttr<DLLImportAttr>() && !FD->isInlined() && | ||||||
14350 | !FD->isTemplateInstantiation()) { | ||||||
14351 | assert(!FD->hasAttr<DLLExportAttr>())(static_cast <bool> (!FD->hasAttr<DLLExportAttr> ()) ? void (0) : __assert_fail ("!FD->hasAttr<DLLExportAttr>()" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14351, __extension__ __PRETTY_FUNCTION__)); | ||||||
14352 | Diag(FD->getLocation(), diag::err_attribute_dllimport_function_definition); | ||||||
14353 | FD->setInvalidDecl(); | ||||||
14354 | return D; | ||||||
14355 | } | ||||||
14356 | // We want to attach documentation to original Decl (which might be | ||||||
14357 | // a function template). | ||||||
14358 | ActOnDocumentableDecl(D); | ||||||
14359 | if (getCurLexicalContext()->isObjCContainer() && | ||||||
14360 | getCurLexicalContext()->getDeclKind() != Decl::ObjCCategoryImpl && | ||||||
14361 | getCurLexicalContext()->getDeclKind() != Decl::ObjCImplementation) | ||||||
14362 | Diag(FD->getLocation(), diag::warn_function_def_in_objc_container); | ||||||
14363 | |||||||
14364 | return D; | ||||||
14365 | } | ||||||
14366 | |||||||
14367 | /// Given the set of return statements within a function body, | ||||||
14368 | /// compute the variables that are subject to the named return value | ||||||
14369 | /// optimization. | ||||||
14370 | /// | ||||||
14371 | /// Each of the variables that is subject to the named return value | ||||||
14372 | /// optimization will be marked as NRVO variables in the AST, and any | ||||||
14373 | /// return statement that has a marked NRVO variable as its NRVO candidate can | ||||||
14374 | /// use the named return value optimization. | ||||||
14375 | /// | ||||||
14376 | /// This function applies a very simplistic algorithm for NRVO: if every return | ||||||
14377 | /// statement in the scope of a variable has the same NRVO candidate, that | ||||||
14378 | /// candidate is an NRVO variable. | ||||||
14379 | void Sema::computeNRVO(Stmt *Body, FunctionScopeInfo *Scope) { | ||||||
14380 | ReturnStmt **Returns = Scope->Returns.data(); | ||||||
14381 | |||||||
14382 | for (unsigned I = 0, E = Scope->Returns.size(); I != E; ++I) { | ||||||
14383 | if (const VarDecl *NRVOCandidate = Returns[I]->getNRVOCandidate()) { | ||||||
14384 | if (!NRVOCandidate->isNRVOVariable()) | ||||||
14385 | Returns[I]->setNRVOCandidate(nullptr); | ||||||
14386 | } | ||||||
14387 | } | ||||||
14388 | } | ||||||
14389 | |||||||
14390 | bool Sema::canDelayFunctionBody(const Declarator &D) { | ||||||
14391 | // We can't delay parsing the body of a constexpr function template (yet). | ||||||
14392 | if (D.getDeclSpec().hasConstexprSpecifier()) | ||||||
14393 | return false; | ||||||
14394 | |||||||
14395 | // We can't delay parsing the body of a function template with a deduced | ||||||
14396 | // return type (yet). | ||||||
14397 | if (D.getDeclSpec().hasAutoTypeSpec()) { | ||||||
14398 | // If the placeholder introduces a non-deduced trailing return type, | ||||||
14399 | // we can still delay parsing it. | ||||||
14400 | if (D.getNumTypeObjects()) { | ||||||
14401 | const auto &Outer = D.getTypeObject(D.getNumTypeObjects() - 1); | ||||||
14402 | if (Outer.Kind == DeclaratorChunk::Function && | ||||||
14403 | Outer.Fun.hasTrailingReturnType()) { | ||||||
14404 | QualType Ty = GetTypeFromParser(Outer.Fun.getTrailingReturnType()); | ||||||
14405 | return Ty.isNull() || !Ty->isUndeducedType(); | ||||||
14406 | } | ||||||
14407 | } | ||||||
14408 | return false; | ||||||
14409 | } | ||||||
14410 | |||||||
14411 | return true; | ||||||
14412 | } | ||||||
14413 | |||||||
14414 | bool Sema::canSkipFunctionBody(Decl *D) { | ||||||
14415 | // We cannot skip the body of a function (or function template) which is | ||||||
14416 | // constexpr, since we may need to evaluate its body in order to parse the | ||||||
14417 | // rest of the file. | ||||||
14418 | // We cannot skip the body of a function with an undeduced return type, | ||||||
14419 | // because any callers of that function need to know the type. | ||||||
14420 | if (const FunctionDecl *FD = D->getAsFunction()) { | ||||||
14421 | if (FD->isConstexpr()) | ||||||
14422 | return false; | ||||||
14423 | // We can't simply call Type::isUndeducedType here, because inside template | ||||||
14424 | // auto can be deduced to a dependent type, which is not considered | ||||||
14425 | // "undeduced". | ||||||
14426 | if (FD->getReturnType()->getContainedDeducedType()) | ||||||
14427 | return false; | ||||||
14428 | } | ||||||
14429 | return Consumer.shouldSkipFunctionBody(D); | ||||||
14430 | } | ||||||
14431 | |||||||
14432 | Decl *Sema::ActOnSkippedFunctionBody(Decl *Decl) { | ||||||
14433 | if (!Decl) | ||||||
14434 | return nullptr; | ||||||
14435 | if (FunctionDecl *FD = Decl->getAsFunction()) | ||||||
14436 | FD->setHasSkippedBody(); | ||||||
14437 | else if (ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(Decl)) | ||||||
14438 | MD->setHasSkippedBody(); | ||||||
14439 | return Decl; | ||||||
14440 | } | ||||||
14441 | |||||||
14442 | Decl *Sema::ActOnFinishFunctionBody(Decl *D, Stmt *BodyArg) { | ||||||
14443 | return ActOnFinishFunctionBody(D, BodyArg, false); | ||||||
14444 | } | ||||||
14445 | |||||||
14446 | /// RAII object that pops an ExpressionEvaluationContext when exiting a function | ||||||
14447 | /// body. | ||||||
14448 | class ExitFunctionBodyRAII { | ||||||
14449 | public: | ||||||
14450 | ExitFunctionBodyRAII(Sema &S, bool IsLambda) : S(S), IsLambda(IsLambda) {} | ||||||
14451 | ~ExitFunctionBodyRAII() { | ||||||
14452 | if (!IsLambda) | ||||||
14453 | S.PopExpressionEvaluationContext(); | ||||||
14454 | } | ||||||
14455 | |||||||
14456 | private: | ||||||
14457 | Sema &S; | ||||||
14458 | bool IsLambda = false; | ||||||
14459 | }; | ||||||
14460 | |||||||
14461 | static void diagnoseImplicitlyRetainedSelf(Sema &S) { | ||||||
14462 | llvm::DenseMap<const BlockDecl *, bool> EscapeInfo; | ||||||
14463 | |||||||
14464 | auto IsOrNestedInEscapingBlock = [&](const BlockDecl *BD) { | ||||||
14465 | if (EscapeInfo.count(BD)) | ||||||
14466 | return EscapeInfo[BD]; | ||||||
14467 | |||||||
14468 | bool R = false; | ||||||
14469 | const BlockDecl *CurBD = BD; | ||||||
14470 | |||||||
14471 | do { | ||||||
14472 | R = !CurBD->doesNotEscape(); | ||||||
14473 | if (R) | ||||||
14474 | break; | ||||||
14475 | CurBD = CurBD->getParent()->getInnermostBlockDecl(); | ||||||
14476 | } while (CurBD); | ||||||
14477 | |||||||
14478 | return EscapeInfo[BD] = R; | ||||||
14479 | }; | ||||||
14480 | |||||||
14481 | // If the location where 'self' is implicitly retained is inside a escaping | ||||||
14482 | // block, emit a diagnostic. | ||||||
14483 | for (const std::pair<SourceLocation, const BlockDecl *> &P : | ||||||
14484 | S.ImplicitlyRetainedSelfLocs) | ||||||
14485 | if (IsOrNestedInEscapingBlock(P.second)) | ||||||
14486 | S.Diag(P.first, diag::warn_implicitly_retains_self) | ||||||
14487 | << FixItHint::CreateInsertion(P.first, "self->"); | ||||||
14488 | } | ||||||
14489 | |||||||
14490 | Decl *Sema::ActOnFinishFunctionBody(Decl *dcl, Stmt *Body, | ||||||
14491 | bool IsInstantiation) { | ||||||
14492 | FunctionScopeInfo *FSI = getCurFunction(); | ||||||
14493 | FunctionDecl *FD = dcl ? dcl->getAsFunction() : nullptr; | ||||||
14494 | |||||||
14495 | if (FSI->UsesFPIntrin && !FD->hasAttr<StrictFPAttr>()) | ||||||
14496 | FD->addAttr(StrictFPAttr::CreateImplicit(Context)); | ||||||
14497 | |||||||
14498 | sema::AnalysisBasedWarnings::Policy WP = AnalysisWarnings.getDefaultPolicy(); | ||||||
14499 | sema::AnalysisBasedWarnings::Policy *ActivePolicy = nullptr; | ||||||
14500 | |||||||
14501 | if (getLangOpts().Coroutines && FSI->isCoroutine()) | ||||||
14502 | CheckCompletedCoroutineBody(FD, Body); | ||||||
14503 | |||||||
14504 | // Do not call PopExpressionEvaluationContext() if it is a lambda because one | ||||||
14505 | // is already popped when finishing the lambda in BuildLambdaExpr(). This is | ||||||
14506 | // meant to pop the context added in ActOnStartOfFunctionDef(). | ||||||
14507 | ExitFunctionBodyRAII ExitRAII(*this, isLambdaCallOperator(FD)); | ||||||
14508 | |||||||
14509 | if (FD) { | ||||||
14510 | FD->setBody(Body); | ||||||
14511 | FD->setWillHaveBody(false); | ||||||
14512 | |||||||
14513 | if (getLangOpts().CPlusPlus14) { | ||||||
14514 | if (!FD->isInvalidDecl() && Body && !FD->isDependentContext() && | ||||||
14515 | FD->getReturnType()->isUndeducedType()) { | ||||||
14516 | // If the function has a deduced result type but contains no 'return' | ||||||
14517 | // statements, the result type as written must be exactly 'auto', and | ||||||
14518 | // the deduced result type is 'void'. | ||||||
14519 | if (!FD->getReturnType()->getAs<AutoType>()) { | ||||||
14520 | Diag(dcl->getLocation(), diag::err_auto_fn_no_return_but_not_auto) | ||||||
14521 | << FD->getReturnType(); | ||||||
14522 | FD->setInvalidDecl(); | ||||||
14523 | } else { | ||||||
14524 | // Substitute 'void' for the 'auto' in the type. | ||||||
14525 | TypeLoc ResultType = getReturnTypeLoc(FD); | ||||||
14526 | Context.adjustDeducedFunctionResultType( | ||||||
14527 | FD, SubstAutoType(ResultType.getType(), Context.VoidTy)); | ||||||
14528 | } | ||||||
14529 | } | ||||||
14530 | } else if (getLangOpts().CPlusPlus11 && isLambdaCallOperator(FD)) { | ||||||
14531 | // In C++11, we don't use 'auto' deduction rules for lambda call | ||||||
14532 | // operators because we don't support return type deduction. | ||||||
14533 | auto *LSI = getCurLambda(); | ||||||
14534 | if (LSI->HasImplicitReturnType) { | ||||||
14535 | deduceClosureReturnType(*LSI); | ||||||
14536 | |||||||
14537 | // C++11 [expr.prim.lambda]p4: | ||||||
14538 | // [...] if there are no return statements in the compound-statement | ||||||
14539 | // [the deduced type is] the type void | ||||||
14540 | QualType RetType = | ||||||
14541 | LSI->ReturnType.isNull() ? Context.VoidTy : LSI->ReturnType; | ||||||
14542 | |||||||
14543 | // Update the return type to the deduced type. | ||||||
14544 | const auto *Proto = FD->getType()->castAs<FunctionProtoType>(); | ||||||
14545 | FD->setType(Context.getFunctionType(RetType, Proto->getParamTypes(), | ||||||
14546 | Proto->getExtProtoInfo())); | ||||||
14547 | } | ||||||
14548 | } | ||||||
14549 | |||||||
14550 | // If the function implicitly returns zero (like 'main') or is naked, | ||||||
14551 | // don't complain about missing return statements. | ||||||
14552 | if (FD->hasImplicitReturnZero() || FD->hasAttr<NakedAttr>()) | ||||||
14553 | WP.disableCheckFallThrough(); | ||||||
14554 | |||||||
14555 | // MSVC permits the use of pure specifier (=0) on function definition, | ||||||
14556 | // defined at class scope, warn about this non-standard construct. | ||||||
14557 | if (getLangOpts().MicrosoftExt && FD->isPure() && !FD->isOutOfLine()) | ||||||
14558 | Diag(FD->getLocation(), diag::ext_pure_function_definition); | ||||||
14559 | |||||||
14560 | if (!FD->isInvalidDecl()) { | ||||||
14561 | // Don't diagnose unused parameters of defaulted or deleted functions. | ||||||
14562 | if (!FD->isDeleted() && !FD->isDefaulted() && !FD->hasSkippedBody()) | ||||||
14563 | DiagnoseUnusedParameters(FD->parameters()); | ||||||
14564 | DiagnoseSizeOfParametersAndReturnValue(FD->parameters(), | ||||||
14565 | FD->getReturnType(), FD); | ||||||
14566 | |||||||
14567 | // If this is a structor, we need a vtable. | ||||||
14568 | if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(FD)) | ||||||
14569 | MarkVTableUsed(FD->getLocation(), Constructor->getParent()); | ||||||
14570 | else if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(FD)) | ||||||
14571 | MarkVTableUsed(FD->getLocation(), Destructor->getParent()); | ||||||
14572 | |||||||
14573 | // Try to apply the named return value optimization. We have to check | ||||||
14574 | // if we can do this here because lambdas keep return statements around | ||||||
14575 | // to deduce an implicit return type. | ||||||
14576 | if (FD->getReturnType()->isRecordType() && | ||||||
14577 | (!getLangOpts().CPlusPlus || !FD->isDependentContext())) | ||||||
14578 | computeNRVO(Body, FSI); | ||||||
14579 | } | ||||||
14580 | |||||||
14581 | // GNU warning -Wmissing-prototypes: | ||||||
14582 | // Warn if a global function is defined without a previous | ||||||
14583 | // prototype declaration. This warning is issued even if the | ||||||
14584 | // definition itself provides a prototype. The aim is to detect | ||||||
14585 | // global functions that fail to be declared in header files. | ||||||
14586 | const FunctionDecl *PossiblePrototype = nullptr; | ||||||
14587 | if (ShouldWarnAboutMissingPrototype(FD, PossiblePrototype)) { | ||||||
14588 | Diag(FD->getLocation(), diag::warn_missing_prototype) << FD; | ||||||
14589 | |||||||
14590 | if (PossiblePrototype) { | ||||||
14591 | // We found a declaration that is not a prototype, | ||||||
14592 | // but that could be a zero-parameter prototype | ||||||
14593 | if (TypeSourceInfo *TI = PossiblePrototype->getTypeSourceInfo()) { | ||||||
14594 | TypeLoc TL = TI->getTypeLoc(); | ||||||
14595 | if (FunctionNoProtoTypeLoc FTL = TL.getAs<FunctionNoProtoTypeLoc>()) | ||||||
14596 | Diag(PossiblePrototype->getLocation(), | ||||||
14597 | diag::note_declaration_not_a_prototype) | ||||||
14598 | << (FD->getNumParams() != 0) | ||||||
14599 | << (FD->getNumParams() == 0 | ||||||
14600 | ? FixItHint::CreateInsertion(FTL.getRParenLoc(), "void") | ||||||
14601 | : FixItHint{}); | ||||||
14602 | } | ||||||
14603 | } else { | ||||||
14604 | // Returns true if the token beginning at this Loc is `const`. | ||||||
14605 | auto isLocAtConst = [&](SourceLocation Loc, const SourceManager &SM, | ||||||
14606 | const LangOptions &LangOpts) { | ||||||
14607 | std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc); | ||||||
14608 | if (LocInfo.first.isInvalid()) | ||||||
14609 | return false; | ||||||
14610 | |||||||
14611 | bool Invalid = false; | ||||||
14612 | StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid); | ||||||
14613 | if (Invalid) | ||||||
14614 | return false; | ||||||
14615 | |||||||
14616 | if (LocInfo.second > Buffer.size()) | ||||||
14617 | return false; | ||||||
14618 | |||||||
14619 | const char *LexStart = Buffer.data() + LocInfo.second; | ||||||
14620 | StringRef StartTok(LexStart, Buffer.size() - LocInfo.second); | ||||||
14621 | |||||||
14622 | return StartTok.consume_front("const") && | ||||||
14623 | (StartTok.empty() || isWhitespace(StartTok[0]) || | ||||||
14624 | StartTok.startswith("/*") || StartTok.startswith("//")); | ||||||
14625 | }; | ||||||
14626 | |||||||
14627 | auto findBeginLoc = [&]() { | ||||||
14628 | // If the return type has `const` qualifier, we want to insert | ||||||
14629 | // `static` before `const` (and not before the typename). | ||||||
14630 | if ((FD->getReturnType()->isAnyPointerType() && | ||||||
14631 | FD->getReturnType()->getPointeeType().isConstQualified()) || | ||||||
14632 | FD->getReturnType().isConstQualified()) { | ||||||
14633 | // But only do this if we can determine where the `const` is. | ||||||
14634 | |||||||
14635 | if (isLocAtConst(FD->getBeginLoc(), getSourceManager(), | ||||||
14636 | getLangOpts())) | ||||||
14637 | |||||||
14638 | return FD->getBeginLoc(); | ||||||
14639 | } | ||||||
14640 | return FD->getTypeSpecStartLoc(); | ||||||
14641 | }; | ||||||
14642 | Diag(FD->getTypeSpecStartLoc(), diag::note_static_for_internal_linkage) | ||||||
14643 | << /* function */ 1 | ||||||
14644 | << (FD->getStorageClass() == SC_None | ||||||
14645 | ? FixItHint::CreateInsertion(findBeginLoc(), "static ") | ||||||
14646 | : FixItHint{}); | ||||||
14647 | } | ||||||
14648 | |||||||
14649 | // GNU warning -Wstrict-prototypes | ||||||
14650 | // Warn if K&R function is defined without a previous declaration. | ||||||
14651 | // This warning is issued only if the definition itself does not provide | ||||||
14652 | // a prototype. Only K&R definitions do not provide a prototype. | ||||||
14653 | if (!FD->hasWrittenPrototype()) { | ||||||
14654 | TypeSourceInfo *TI = FD->getTypeSourceInfo(); | ||||||
14655 | TypeLoc TL = TI->getTypeLoc(); | ||||||
14656 | FunctionTypeLoc FTL = TL.getAsAdjusted<FunctionTypeLoc>(); | ||||||
14657 | Diag(FTL.getLParenLoc(), diag::warn_strict_prototypes) << 2; | ||||||
14658 | } | ||||||
14659 | } | ||||||
14660 | |||||||
14661 | // Warn on CPUDispatch with an actual body. | ||||||
14662 | if (FD->isMultiVersion() && FD->hasAttr<CPUDispatchAttr>() && Body) | ||||||
14663 | if (const auto *CmpndBody = dyn_cast<CompoundStmt>(Body)) | ||||||
14664 | if (!CmpndBody->body_empty()) | ||||||
14665 | Diag(CmpndBody->body_front()->getBeginLoc(), | ||||||
14666 | diag::warn_dispatch_body_ignored); | ||||||
14667 | |||||||
14668 | if (auto *MD = dyn_cast<CXXMethodDecl>(FD)) { | ||||||
14669 | const CXXMethodDecl *KeyFunction; | ||||||
14670 | if (MD->isOutOfLine() && (MD = MD->getCanonicalDecl()) && | ||||||
14671 | MD->isVirtual() && | ||||||
14672 | (KeyFunction = Context.getCurrentKeyFunction(MD->getParent())) && | ||||||
14673 | MD == KeyFunction->getCanonicalDecl()) { | ||||||
14674 | // Update the key-function state if necessary for this ABI. | ||||||
14675 | if (FD->isInlined() && | ||||||
14676 | !Context.getTargetInfo().getCXXABI().canKeyFunctionBeInline()) { | ||||||
14677 | Context.setNonKeyFunction(MD); | ||||||
14678 | |||||||
14679 | // If the newly-chosen key function is already defined, then we | ||||||
14680 | // need to mark the vtable as used retroactively. | ||||||
14681 | KeyFunction = Context.getCurrentKeyFunction(MD->getParent()); | ||||||
14682 | const FunctionDecl *Definition; | ||||||
14683 | if (KeyFunction && KeyFunction->isDefined(Definition)) | ||||||
14684 | MarkVTableUsed(Definition->getLocation(), MD->getParent(), true); | ||||||
14685 | } else { | ||||||
14686 | // We just defined they key function; mark the vtable as used. | ||||||
14687 | MarkVTableUsed(FD->getLocation(), MD->getParent(), true); | ||||||
14688 | } | ||||||
14689 | } | ||||||
14690 | } | ||||||
14691 | |||||||
14692 | assert((FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) &&(static_cast <bool> ((FD == getCurFunctionDecl() || getCurLambda ()->CallOperator == FD) && "Function parsing confused" ) ? void (0) : __assert_fail ("(FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14693, __extension__ __PRETTY_FUNCTION__)) | ||||||
14693 | "Function parsing confused")(static_cast <bool> ((FD == getCurFunctionDecl() || getCurLambda ()->CallOperator == FD) && "Function parsing confused" ) ? void (0) : __assert_fail ("(FD == getCurFunctionDecl() || getCurLambda()->CallOperator == FD) && \"Function parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14693, __extension__ __PRETTY_FUNCTION__)); | ||||||
14694 | } else if (ObjCMethodDecl *MD = dyn_cast_or_null<ObjCMethodDecl>(dcl)) { | ||||||
14695 | assert(MD == getCurMethodDecl() && "Method parsing confused")(static_cast <bool> (MD == getCurMethodDecl() && "Method parsing confused") ? void (0) : __assert_fail ("MD == getCurMethodDecl() && \"Method parsing confused\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14695, __extension__ __PRETTY_FUNCTION__)); | ||||||
14696 | MD->setBody(Body); | ||||||
14697 | if (!MD->isInvalidDecl()) { | ||||||
14698 | DiagnoseSizeOfParametersAndReturnValue(MD->parameters(), | ||||||
14699 | MD->getReturnType(), MD); | ||||||
14700 | |||||||
14701 | if (Body) | ||||||
14702 | computeNRVO(Body, FSI); | ||||||
14703 | } | ||||||
14704 | if (FSI->ObjCShouldCallSuper) { | ||||||
14705 | Diag(MD->getEndLoc(), diag::warn_objc_missing_super_call) | ||||||
14706 | << MD->getSelector().getAsString(); | ||||||
14707 | FSI->ObjCShouldCallSuper = false; | ||||||
14708 | } | ||||||
14709 | if (FSI->ObjCWarnForNoDesignatedInitChain) { | ||||||
14710 | const ObjCMethodDecl *InitMethod = nullptr; | ||||||
14711 | bool isDesignated = | ||||||
14712 | MD->isDesignatedInitializerForTheInterface(&InitMethod); | ||||||
14713 | assert(isDesignated && InitMethod)(static_cast <bool> (isDesignated && InitMethod ) ? void (0) : __assert_fail ("isDesignated && InitMethod" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14713, __extension__ __PRETTY_FUNCTION__)); | ||||||
14714 | (void)isDesignated; | ||||||
14715 | |||||||
14716 | auto superIsNSObject = [&](const ObjCMethodDecl *MD) { | ||||||
14717 | auto IFace = MD->getClassInterface(); | ||||||
14718 | if (!IFace) | ||||||
14719 | return false; | ||||||
14720 | auto SuperD = IFace->getSuperClass(); | ||||||
14721 | if (!SuperD) | ||||||
14722 | return false; | ||||||
14723 | return SuperD->getIdentifier() == | ||||||
14724 | NSAPIObj->getNSClassId(NSAPI::ClassId_NSObject); | ||||||
14725 | }; | ||||||
14726 | // Don't issue this warning for unavailable inits or direct subclasses | ||||||
14727 | // of NSObject. | ||||||
14728 | if (!MD->isUnavailable() && !superIsNSObject(MD)) { | ||||||
14729 | Diag(MD->getLocation(), | ||||||
14730 | diag::warn_objc_designated_init_missing_super_call); | ||||||
14731 | Diag(InitMethod->getLocation(), | ||||||
14732 | diag::note_objc_designated_init_marked_here); | ||||||
14733 | } | ||||||
14734 | FSI->ObjCWarnForNoDesignatedInitChain = false; | ||||||
14735 | } | ||||||
14736 | if (FSI->ObjCWarnForNoInitDelegation) { | ||||||
14737 | // Don't issue this warning for unavaialable inits. | ||||||
14738 | if (!MD->isUnavailable()) | ||||||
14739 | Diag(MD->getLocation(), | ||||||
14740 | diag::warn_objc_secondary_init_missing_init_call); | ||||||
14741 | FSI->ObjCWarnForNoInitDelegation = false; | ||||||
14742 | } | ||||||
14743 | |||||||
14744 | diagnoseImplicitlyRetainedSelf(*this); | ||||||
14745 | } else { | ||||||
14746 | // Parsing the function declaration failed in some way. Pop the fake scope | ||||||
14747 | // we pushed on. | ||||||
14748 | PopFunctionScopeInfo(ActivePolicy, dcl); | ||||||
14749 | return nullptr; | ||||||
14750 | } | ||||||
14751 | |||||||
14752 | if (Body && FSI->HasPotentialAvailabilityViolations) | ||||||
14753 | DiagnoseUnguardedAvailabilityViolations(dcl); | ||||||
14754 | |||||||
14755 | assert(!FSI->ObjCShouldCallSuper &&(static_cast <bool> (!FSI->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? void (0) : __assert_fail ("!FSI->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14757, __extension__ __PRETTY_FUNCTION__)) | ||||||
14756 | "This should only be set for ObjC methods, which should have been "(static_cast <bool> (!FSI->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? void (0) : __assert_fail ("!FSI->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14757, __extension__ __PRETTY_FUNCTION__)) | ||||||
14757 | "handled in the block above.")(static_cast <bool> (!FSI->ObjCShouldCallSuper && "This should only be set for ObjC methods, which should have been " "handled in the block above.") ? void (0) : __assert_fail ("!FSI->ObjCShouldCallSuper && \"This should only be set for ObjC methods, which should have been \" \"handled in the block above.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14757, __extension__ __PRETTY_FUNCTION__)); | ||||||
14758 | |||||||
14759 | // Verify and clean out per-function state. | ||||||
14760 | if (Body && (!FD || !FD->isDefaulted())) { | ||||||
14761 | // C++ constructors that have function-try-blocks can't have return | ||||||
14762 | // statements in the handlers of that block. (C++ [except.handle]p14) | ||||||
14763 | // Verify this. | ||||||
14764 | if (FD && isa<CXXConstructorDecl>(FD) && isa<CXXTryStmt>(Body)) | ||||||
14765 | DiagnoseReturnInConstructorExceptionHandler(cast<CXXTryStmt>(Body)); | ||||||
14766 | |||||||
14767 | // Verify that gotos and switch cases don't jump into scopes illegally. | ||||||
14768 | if (FSI->NeedsScopeChecking() && | ||||||
14769 | !PP.isCodeCompletionEnabled()) | ||||||
14770 | DiagnoseInvalidJumps(Body); | ||||||
14771 | |||||||
14772 | if (CXXDestructorDecl *Destructor = dyn_cast<CXXDestructorDecl>(dcl)) { | ||||||
14773 | if (!Destructor->getParent()->isDependentType()) | ||||||
14774 | CheckDestructor(Destructor); | ||||||
14775 | |||||||
14776 | MarkBaseAndMemberDestructorsReferenced(Destructor->getLocation(), | ||||||
14777 | Destructor->getParent()); | ||||||
14778 | } | ||||||
14779 | |||||||
14780 | // If any errors have occurred, clear out any temporaries that may have | ||||||
14781 | // been leftover. This ensures that these temporaries won't be picked up for | ||||||
14782 | // deletion in some later function. | ||||||
14783 | if (hasUncompilableErrorOccurred() || | ||||||
14784 | getDiagnostics().getSuppressAllDiagnostics()) { | ||||||
14785 | DiscardCleanupsInEvaluationContext(); | ||||||
14786 | } | ||||||
14787 | if (!hasUncompilableErrorOccurred() && | ||||||
14788 | !isa<FunctionTemplateDecl>(dcl)) { | ||||||
14789 | // Since the body is valid, issue any analysis-based warnings that are | ||||||
14790 | // enabled. | ||||||
14791 | ActivePolicy = &WP; | ||||||
14792 | } | ||||||
14793 | |||||||
14794 | if (!IsInstantiation && FD && FD->isConstexpr() && !FD->isInvalidDecl() && | ||||||
14795 | !CheckConstexprFunctionDefinition(FD, CheckConstexprKind::Diagnose)) | ||||||
14796 | FD->setInvalidDecl(); | ||||||
14797 | |||||||
14798 | if (FD && FD->hasAttr<NakedAttr>()) { | ||||||
14799 | for (const Stmt *S : Body->children()) { | ||||||
14800 | // Allow local register variables without initializer as they don't | ||||||
14801 | // require prologue. | ||||||
14802 | bool RegisterVariables = false; | ||||||
14803 | if (auto *DS = dyn_cast<DeclStmt>(S)) { | ||||||
14804 | for (const auto *Decl : DS->decls()) { | ||||||
14805 | if (const auto *Var = dyn_cast<VarDecl>(Decl)) { | ||||||
14806 | RegisterVariables = | ||||||
14807 | Var->hasAttr<AsmLabelAttr>() && !Var->hasInit(); | ||||||
14808 | if (!RegisterVariables) | ||||||
14809 | break; | ||||||
14810 | } | ||||||
14811 | } | ||||||
14812 | } | ||||||
14813 | if (RegisterVariables) | ||||||
14814 | continue; | ||||||
14815 | if (!isa<AsmStmt>(S) && !isa<NullStmt>(S)) { | ||||||
14816 | Diag(S->getBeginLoc(), diag::err_non_asm_stmt_in_naked_function); | ||||||
14817 | Diag(FD->getAttr<NakedAttr>()->getLocation(), diag::note_attribute); | ||||||
14818 | FD->setInvalidDecl(); | ||||||
14819 | break; | ||||||
14820 | } | ||||||
14821 | } | ||||||
14822 | } | ||||||
14823 | |||||||
14824 | assert(ExprCleanupObjects.size() ==(static_cast <bool> (ExprCleanupObjects.size() == ExprEvalContexts .back().NumCleanupObjects && "Leftover temporaries in function" ) ? void (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14826, __extension__ __PRETTY_FUNCTION__)) | ||||||
14825 | ExprEvalContexts.back().NumCleanupObjects &&(static_cast <bool> (ExprCleanupObjects.size() == ExprEvalContexts .back().NumCleanupObjects && "Leftover temporaries in function" ) ? void (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14826, __extension__ __PRETTY_FUNCTION__)) | ||||||
14826 | "Leftover temporaries in function")(static_cast <bool> (ExprCleanupObjects.size() == ExprEvalContexts .back().NumCleanupObjects && "Leftover temporaries in function" ) ? void (0) : __assert_fail ("ExprCleanupObjects.size() == ExprEvalContexts.back().NumCleanupObjects && \"Leftover temporaries in function\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14826, __extension__ __PRETTY_FUNCTION__)); | ||||||
14827 | assert(!Cleanup.exprNeedsCleanups() && "Unaccounted cleanups in function")(static_cast <bool> (!Cleanup.exprNeedsCleanups() && "Unaccounted cleanups in function") ? void (0) : __assert_fail ("!Cleanup.exprNeedsCleanups() && \"Unaccounted cleanups in function\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14827, __extension__ __PRETTY_FUNCTION__)); | ||||||
14828 | assert(MaybeODRUseExprs.empty() &&(static_cast <bool> (MaybeODRUseExprs.empty() && "Leftover expressions for odr-use checking") ? void (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"Leftover expressions for odr-use checking\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14829, __extension__ __PRETTY_FUNCTION__)) | ||||||
14829 | "Leftover expressions for odr-use checking")(static_cast <bool> (MaybeODRUseExprs.empty() && "Leftover expressions for odr-use checking") ? void (0) : __assert_fail ("MaybeODRUseExprs.empty() && \"Leftover expressions for odr-use checking\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14829, __extension__ __PRETTY_FUNCTION__)); | ||||||
14830 | } | ||||||
14831 | |||||||
14832 | if (!IsInstantiation) | ||||||
14833 | PopDeclContext(); | ||||||
14834 | |||||||
14835 | PopFunctionScopeInfo(ActivePolicy, dcl); | ||||||
14836 | // If any errors have occurred, clear out any temporaries that may have | ||||||
14837 | // been leftover. This ensures that these temporaries won't be picked up for | ||||||
14838 | // deletion in some later function. | ||||||
14839 | if (hasUncompilableErrorOccurred()) { | ||||||
14840 | DiscardCleanupsInEvaluationContext(); | ||||||
14841 | } | ||||||
14842 | |||||||
14843 | if (FD && (LangOpts.OpenMP || LangOpts.CUDA || LangOpts.SYCLIsDevice)) { | ||||||
14844 | auto ES = getEmissionStatus(FD); | ||||||
14845 | if (ES == Sema::FunctionEmissionStatus::Emitted || | ||||||
14846 | ES == Sema::FunctionEmissionStatus::Unknown) | ||||||
14847 | DeclsToCheckForDeferredDiags.insert(FD); | ||||||
14848 | } | ||||||
14849 | |||||||
14850 | return dcl; | ||||||
14851 | } | ||||||
14852 | |||||||
14853 | /// When we finish delayed parsing of an attribute, we must attach it to the | ||||||
14854 | /// relevant Decl. | ||||||
14855 | void Sema::ActOnFinishDelayedAttribute(Scope *S, Decl *D, | ||||||
14856 | ParsedAttributes &Attrs) { | ||||||
14857 | // Always attach attributes to the underlying decl. | ||||||
14858 | if (TemplateDecl *TD = dyn_cast<TemplateDecl>(D)) | ||||||
14859 | D = TD->getTemplatedDecl(); | ||||||
14860 | ProcessDeclAttributeList(S, D, Attrs); | ||||||
14861 | |||||||
14862 | if (CXXMethodDecl *Method = dyn_cast_or_null<CXXMethodDecl>(D)) | ||||||
14863 | if (Method->isStatic()) | ||||||
14864 | checkThisInStaticMemberFunctionAttributes(Method); | ||||||
14865 | } | ||||||
14866 | |||||||
14867 | /// ImplicitlyDefineFunction - An undeclared identifier was used in a function | ||||||
14868 | /// call, forming a call to an implicitly defined function (per C99 6.5.1p2). | ||||||
14869 | NamedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc, | ||||||
14870 | IdentifierInfo &II, Scope *S) { | ||||||
14871 | // Find the scope in which the identifier is injected and the corresponding | ||||||
14872 | // DeclContext. | ||||||
14873 | // FIXME: C89 does not say what happens if there is no enclosing block scope. | ||||||
14874 | // In that case, we inject the declaration into the translation unit scope | ||||||
14875 | // instead. | ||||||
14876 | Scope *BlockScope = S; | ||||||
14877 | while (!BlockScope->isCompoundStmtScope() && BlockScope->getParent()) | ||||||
14878 | BlockScope = BlockScope->getParent(); | ||||||
14879 | |||||||
14880 | Scope *ContextScope = BlockScope; | ||||||
14881 | while (!ContextScope->getEntity()) | ||||||
14882 | ContextScope = ContextScope->getParent(); | ||||||
14883 | ContextRAII SavedContext(*this, ContextScope->getEntity()); | ||||||
14884 | |||||||
14885 | // Before we produce a declaration for an implicitly defined | ||||||
14886 | // function, see whether there was a locally-scoped declaration of | ||||||
14887 | // this name as a function or variable. If so, use that | ||||||
14888 | // (non-visible) declaration, and complain about it. | ||||||
14889 | NamedDecl *ExternCPrev = findLocallyScopedExternCDecl(&II); | ||||||
14890 | if (ExternCPrev) { | ||||||
14891 | // We still need to inject the function into the enclosing block scope so | ||||||
14892 | // that later (non-call) uses can see it. | ||||||
14893 | PushOnScopeChains(ExternCPrev, BlockScope, /*AddToContext*/false); | ||||||
14894 | |||||||
14895 | // C89 footnote 38: | ||||||
14896 | // If in fact it is not defined as having type "function returning int", | ||||||
14897 | // the behavior is undefined. | ||||||
14898 | if (!isa<FunctionDecl>(ExternCPrev) || | ||||||
14899 | !Context.typesAreCompatible( | ||||||
14900 | cast<FunctionDecl>(ExternCPrev)->getType(), | ||||||
14901 | Context.getFunctionNoProtoType(Context.IntTy))) { | ||||||
14902 | Diag(Loc, diag::ext_use_out_of_scope_declaration) | ||||||
14903 | << ExternCPrev << !getLangOpts().C99; | ||||||
14904 | Diag(ExternCPrev->getLocation(), diag::note_previous_declaration); | ||||||
14905 | return ExternCPrev; | ||||||
14906 | } | ||||||
14907 | } | ||||||
14908 | |||||||
14909 | // Extension in C99. Legal in C90, but warn about it. | ||||||
14910 | unsigned diag_id; | ||||||
14911 | if (II.getName().startswith("__builtin_")) | ||||||
14912 | diag_id = diag::warn_builtin_unknown; | ||||||
14913 | // OpenCL v2.0 s6.9.u - Implicit function declaration is not supported. | ||||||
14914 | else if (getLangOpts().OpenCL) | ||||||
14915 | diag_id = diag::err_opencl_implicit_function_decl; | ||||||
14916 | else if (getLangOpts().C99) | ||||||
14917 | diag_id = diag::ext_implicit_function_decl; | ||||||
14918 | else | ||||||
14919 | diag_id = diag::warn_implicit_function_decl; | ||||||
14920 | Diag(Loc, diag_id) << &II; | ||||||
14921 | |||||||
14922 | // If we found a prior declaration of this function, don't bother building | ||||||
14923 | // another one. We've already pushed that one into scope, so there's nothing | ||||||
14924 | // more to do. | ||||||
14925 | if (ExternCPrev) | ||||||
14926 | return ExternCPrev; | ||||||
14927 | |||||||
14928 | // Because typo correction is expensive, only do it if the implicit | ||||||
14929 | // function declaration is going to be treated as an error. | ||||||
14930 | if (Diags.getDiagnosticLevel(diag_id, Loc) >= DiagnosticsEngine::Error) { | ||||||
14931 | TypoCorrection Corrected; | ||||||
14932 | DeclFilterCCC<FunctionDecl> CCC{}; | ||||||
14933 | if (S && (Corrected = | ||||||
14934 | CorrectTypo(DeclarationNameInfo(&II, Loc), LookupOrdinaryName, | ||||||
14935 | S, nullptr, CCC, CTK_NonError))) | ||||||
14936 | diagnoseTypo(Corrected, PDiag(diag::note_function_suggestion), | ||||||
14937 | /*ErrorRecovery*/false); | ||||||
14938 | } | ||||||
14939 | |||||||
14940 | // Set a Declarator for the implicit definition: int foo(); | ||||||
14941 | const char *Dummy; | ||||||
14942 | AttributeFactory attrFactory; | ||||||
14943 | DeclSpec DS(attrFactory); | ||||||
14944 | unsigned DiagID; | ||||||
14945 | bool Error = DS.SetTypeSpecType(DeclSpec::TST_int, Loc, Dummy, DiagID, | ||||||
14946 | Context.getPrintingPolicy()); | ||||||
14947 | (void)Error; // Silence warning. | ||||||
14948 | assert(!Error && "Error setting up implicit decl!")(static_cast <bool> (!Error && "Error setting up implicit decl!" ) ? void (0) : __assert_fail ("!Error && \"Error setting up implicit decl!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 14948, __extension__ __PRETTY_FUNCTION__)); | ||||||
14949 | SourceLocation NoLoc; | ||||||
14950 | Declarator D(DS, DeclaratorContext::Block); | ||||||
14951 | D.AddTypeInfo(DeclaratorChunk::getFunction(/*HasProto=*/false, | ||||||
14952 | /*IsAmbiguous=*/false, | ||||||
14953 | /*LParenLoc=*/NoLoc, | ||||||
14954 | /*Params=*/nullptr, | ||||||
14955 | /*NumParams=*/0, | ||||||
14956 | /*EllipsisLoc=*/NoLoc, | ||||||
14957 | /*RParenLoc=*/NoLoc, | ||||||
14958 | /*RefQualifierIsLvalueRef=*/true, | ||||||
14959 | /*RefQualifierLoc=*/NoLoc, | ||||||
14960 | /*MutableLoc=*/NoLoc, EST_None, | ||||||
14961 | /*ESpecRange=*/SourceRange(), | ||||||
14962 | /*Exceptions=*/nullptr, | ||||||
14963 | /*ExceptionRanges=*/nullptr, | ||||||
14964 | /*NumExceptions=*/0, | ||||||
14965 | /*NoexceptExpr=*/nullptr, | ||||||
14966 | /*ExceptionSpecTokens=*/nullptr, | ||||||
14967 | /*DeclsInPrototype=*/None, Loc, | ||||||
14968 | Loc, D), | ||||||
14969 | std::move(DS.getAttributes()), SourceLocation()); | ||||||
14970 | D.SetIdentifier(&II, Loc); | ||||||
14971 | |||||||
14972 | // Insert this function into the enclosing block scope. | ||||||
14973 | FunctionDecl *FD = cast<FunctionDecl>(ActOnDeclarator(BlockScope, D)); | ||||||
14974 | FD->setImplicit(); | ||||||
14975 | |||||||
14976 | AddKnownFunctionAttributes(FD); | ||||||
14977 | |||||||
14978 | return FD; | ||||||
14979 | } | ||||||
14980 | |||||||
14981 | /// If this function is a C++ replaceable global allocation function | ||||||
14982 | /// (C++2a [basic.stc.dynamic.allocation], C++2a [new.delete]), | ||||||
14983 | /// adds any function attributes that we know a priori based on the standard. | ||||||
14984 | /// | ||||||
14985 | /// We need to check for duplicate attributes both here and where user-written | ||||||
14986 | /// attributes are applied to declarations. | ||||||
14987 | void Sema::AddKnownFunctionAttributesForReplaceableGlobalAllocationFunction( | ||||||
14988 | FunctionDecl *FD) { | ||||||
14989 | if (FD->isInvalidDecl()) | ||||||
14990 | return; | ||||||
14991 | |||||||
14992 | if (FD->getDeclName().getCXXOverloadedOperator() != OO_New && | ||||||
14993 | FD->getDeclName().getCXXOverloadedOperator() != OO_Array_New) | ||||||
14994 | return; | ||||||
14995 | |||||||
14996 | Optional<unsigned> AlignmentParam; | ||||||
14997 | bool IsNothrow = false; | ||||||
14998 | if (!FD->isReplaceableGlobalAllocationFunction(&AlignmentParam, &IsNothrow)) | ||||||
14999 | return; | ||||||
15000 | |||||||
15001 | // C++2a [basic.stc.dynamic.allocation]p4: | ||||||
15002 | // An allocation function that has a non-throwing exception specification | ||||||
15003 | // indicates failure by returning a null pointer value. Any other allocation | ||||||
15004 | // function never returns a null pointer value and indicates failure only by | ||||||
15005 | // throwing an exception [...] | ||||||
15006 | if (!IsNothrow && !FD->hasAttr<ReturnsNonNullAttr>()) | ||||||
15007 | FD->addAttr(ReturnsNonNullAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15008 | |||||||
15009 | // C++2a [basic.stc.dynamic.allocation]p2: | ||||||
15010 | // An allocation function attempts to allocate the requested amount of | ||||||
15011 | // storage. [...] If the request succeeds, the value returned by a | ||||||
15012 | // replaceable allocation function is a [...] pointer value p0 different | ||||||
15013 | // from any previously returned value p1 [...] | ||||||
15014 | // | ||||||
15015 | // However, this particular information is being added in codegen, | ||||||
15016 | // because there is an opt-out switch for it (-fno-assume-sane-operator-new) | ||||||
15017 | |||||||
15018 | // C++2a [basic.stc.dynamic.allocation]p2: | ||||||
15019 | // An allocation function attempts to allocate the requested amount of | ||||||
15020 | // storage. If it is successful, it returns the address of the start of a | ||||||
15021 | // block of storage whose length in bytes is at least as large as the | ||||||
15022 | // requested size. | ||||||
15023 | if (!FD->hasAttr<AllocSizeAttr>()) { | ||||||
15024 | FD->addAttr(AllocSizeAttr::CreateImplicit( | ||||||
15025 | Context, /*ElemSizeParam=*/ParamIdx(1, FD), | ||||||
15026 | /*NumElemsParam=*/ParamIdx(), FD->getLocation())); | ||||||
15027 | } | ||||||
15028 | |||||||
15029 | // C++2a [basic.stc.dynamic.allocation]p3: | ||||||
15030 | // For an allocation function [...], the pointer returned on a successful | ||||||
15031 | // call shall represent the address of storage that is aligned as follows: | ||||||
15032 | // (3.1) If the allocation function takes an argument of type | ||||||
15033 | // std::align_val_t, the storage will have the alignment | ||||||
15034 | // specified by the value of this argument. | ||||||
15035 | if (AlignmentParam.hasValue() && !FD->hasAttr<AllocAlignAttr>()) { | ||||||
15036 | FD->addAttr(AllocAlignAttr::CreateImplicit( | ||||||
15037 | Context, ParamIdx(AlignmentParam.getValue(), FD), FD->getLocation())); | ||||||
15038 | } | ||||||
15039 | |||||||
15040 | // FIXME: | ||||||
15041 | // C++2a [basic.stc.dynamic.allocation]p3: | ||||||
15042 | // For an allocation function [...], the pointer returned on a successful | ||||||
15043 | // call shall represent the address of storage that is aligned as follows: | ||||||
15044 | // (3.2) Otherwise, if the allocation function is named operator new[], | ||||||
15045 | // the storage is aligned for any object that does not have | ||||||
15046 | // new-extended alignment ([basic.align]) and is no larger than the | ||||||
15047 | // requested size. | ||||||
15048 | // (3.3) Otherwise, the storage is aligned for any object that does not | ||||||
15049 | // have new-extended alignment and is of the requested size. | ||||||
15050 | } | ||||||
15051 | |||||||
15052 | /// Adds any function attributes that we know a priori based on | ||||||
15053 | /// the declaration of this function. | ||||||
15054 | /// | ||||||
15055 | /// These attributes can apply both to implicitly-declared builtins | ||||||
15056 | /// (like __builtin___printf_chk) or to library-declared functions | ||||||
15057 | /// like NSLog or printf. | ||||||
15058 | /// | ||||||
15059 | /// We need to check for duplicate attributes both here and where user-written | ||||||
15060 | /// attributes are applied to declarations. | ||||||
15061 | void Sema::AddKnownFunctionAttributes(FunctionDecl *FD) { | ||||||
15062 | if (FD->isInvalidDecl()) | ||||||
15063 | return; | ||||||
15064 | |||||||
15065 | // If this is a built-in function, map its builtin attributes to | ||||||
15066 | // actual attributes. | ||||||
15067 | if (unsigned BuiltinID = FD->getBuiltinID()) { | ||||||
15068 | // Handle printf-formatting attributes. | ||||||
15069 | unsigned FormatIdx; | ||||||
15070 | bool HasVAListArg; | ||||||
15071 | if (Context.BuiltinInfo.isPrintfLike(BuiltinID, FormatIdx, HasVAListArg)) { | ||||||
15072 | if (!FD->hasAttr<FormatAttr>()) { | ||||||
15073 | const char *fmt = "printf"; | ||||||
15074 | unsigned int NumParams = FD->getNumParams(); | ||||||
15075 | if (FormatIdx < NumParams && // NumParams may be 0 (e.g. vfprintf) | ||||||
15076 | FD->getParamDecl(FormatIdx)->getType()->isObjCObjectPointerType()) | ||||||
15077 | fmt = "NSString"; | ||||||
15078 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
15079 | &Context.Idents.get(fmt), | ||||||
15080 | FormatIdx+1, | ||||||
15081 | HasVAListArg ? 0 : FormatIdx+2, | ||||||
15082 | FD->getLocation())); | ||||||
15083 | } | ||||||
15084 | } | ||||||
15085 | if (Context.BuiltinInfo.isScanfLike(BuiltinID, FormatIdx, | ||||||
15086 | HasVAListArg)) { | ||||||
15087 | if (!FD->hasAttr<FormatAttr>()) | ||||||
15088 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
15089 | &Context.Idents.get("scanf"), | ||||||
15090 | FormatIdx+1, | ||||||
15091 | HasVAListArg ? 0 : FormatIdx+2, | ||||||
15092 | FD->getLocation())); | ||||||
15093 | } | ||||||
15094 | |||||||
15095 | // Handle automatically recognized callbacks. | ||||||
15096 | SmallVector<int, 4> Encoding; | ||||||
15097 | if (!FD->hasAttr<CallbackAttr>() && | ||||||
15098 | Context.BuiltinInfo.performsCallback(BuiltinID, Encoding)) | ||||||
15099 | FD->addAttr(CallbackAttr::CreateImplicit( | ||||||
15100 | Context, Encoding.data(), Encoding.size(), FD->getLocation())); | ||||||
15101 | |||||||
15102 | // Mark const if we don't care about errno and that is the only thing | ||||||
15103 | // preventing the function from being const. This allows IRgen to use LLVM | ||||||
15104 | // intrinsics for such functions. | ||||||
15105 | if (!getLangOpts().MathErrno && !FD->hasAttr<ConstAttr>() && | ||||||
15106 | Context.BuiltinInfo.isConstWithoutErrno(BuiltinID)) | ||||||
15107 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15108 | |||||||
15109 | // We make "fma" on some platforms const because we know it does not set | ||||||
15110 | // errno in those environments even though it could set errno based on the | ||||||
15111 | // C standard. | ||||||
15112 | const llvm::Triple &Trip = Context.getTargetInfo().getTriple(); | ||||||
15113 | if ((Trip.isGNUEnvironment() || Trip.isAndroid() || Trip.isOSMSVCRT()) && | ||||||
15114 | !FD->hasAttr<ConstAttr>()) { | ||||||
15115 | switch (BuiltinID) { | ||||||
15116 | case Builtin::BI__builtin_fma: | ||||||
15117 | case Builtin::BI__builtin_fmaf: | ||||||
15118 | case Builtin::BI__builtin_fmal: | ||||||
15119 | case Builtin::BIfma: | ||||||
15120 | case Builtin::BIfmaf: | ||||||
15121 | case Builtin::BIfmal: | ||||||
15122 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15123 | break; | ||||||
15124 | default: | ||||||
15125 | break; | ||||||
15126 | } | ||||||
15127 | } | ||||||
15128 | |||||||
15129 | if (Context.BuiltinInfo.isReturnsTwice(BuiltinID) && | ||||||
15130 | !FD->hasAttr<ReturnsTwiceAttr>()) | ||||||
15131 | FD->addAttr(ReturnsTwiceAttr::CreateImplicit(Context, | ||||||
15132 | FD->getLocation())); | ||||||
15133 | if (Context.BuiltinInfo.isNoThrow(BuiltinID) && !FD->hasAttr<NoThrowAttr>()) | ||||||
15134 | FD->addAttr(NoThrowAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15135 | if (Context.BuiltinInfo.isPure(BuiltinID) && !FD->hasAttr<PureAttr>()) | ||||||
15136 | FD->addAttr(PureAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15137 | if (Context.BuiltinInfo.isConst(BuiltinID) && !FD->hasAttr<ConstAttr>()) | ||||||
15138 | FD->addAttr(ConstAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15139 | if (getLangOpts().CUDA && Context.BuiltinInfo.isTSBuiltin(BuiltinID) && | ||||||
15140 | !FD->hasAttr<CUDADeviceAttr>() && !FD->hasAttr<CUDAHostAttr>()) { | ||||||
15141 | // Add the appropriate attribute, depending on the CUDA compilation mode | ||||||
15142 | // and which target the builtin belongs to. For example, during host | ||||||
15143 | // compilation, aux builtins are __device__, while the rest are __host__. | ||||||
15144 | if (getLangOpts().CUDAIsDevice != | ||||||
15145 | Context.BuiltinInfo.isAuxBuiltinID(BuiltinID)) | ||||||
15146 | FD->addAttr(CUDADeviceAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15147 | else | ||||||
15148 | FD->addAttr(CUDAHostAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15149 | } | ||||||
15150 | } | ||||||
15151 | |||||||
15152 | AddKnownFunctionAttributesForReplaceableGlobalAllocationFunction(FD); | ||||||
15153 | |||||||
15154 | // If C++ exceptions are enabled but we are told extern "C" functions cannot | ||||||
15155 | // throw, add an implicit nothrow attribute to any extern "C" function we come | ||||||
15156 | // across. | ||||||
15157 | if (getLangOpts().CXXExceptions && getLangOpts().ExternCNoUnwind && | ||||||
15158 | FD->isExternC() && !FD->hasAttr<NoThrowAttr>()) { | ||||||
15159 | const auto *FPT = FD->getType()->getAs<FunctionProtoType>(); | ||||||
15160 | if (!FPT || FPT->getExceptionSpecType() == EST_None) | ||||||
15161 | FD->addAttr(NoThrowAttr::CreateImplicit(Context, FD->getLocation())); | ||||||
15162 | } | ||||||
15163 | |||||||
15164 | IdentifierInfo *Name = FD->getIdentifier(); | ||||||
15165 | if (!Name) | ||||||
15166 | return; | ||||||
15167 | if ((!getLangOpts().CPlusPlus && | ||||||
15168 | FD->getDeclContext()->isTranslationUnit()) || | ||||||
15169 | (isa<LinkageSpecDecl>(FD->getDeclContext()) && | ||||||
15170 | cast<LinkageSpecDecl>(FD->getDeclContext())->getLanguage() == | ||||||
15171 | LinkageSpecDecl::lang_c)) { | ||||||
15172 | // Okay: this could be a libc/libm/Objective-C function we know | ||||||
15173 | // about. | ||||||
15174 | } else | ||||||
15175 | return; | ||||||
15176 | |||||||
15177 | if (Name->isStr("asprintf") || Name->isStr("vasprintf")) { | ||||||
15178 | // FIXME: asprintf and vasprintf aren't C99 functions. Should they be | ||||||
15179 | // target-specific builtins, perhaps? | ||||||
15180 | if (!FD->hasAttr<FormatAttr>()) | ||||||
15181 | FD->addAttr(FormatAttr::CreateImplicit(Context, | ||||||
15182 | &Context.Idents.get("printf"), 2, | ||||||
15183 | Name->isStr("vasprintf") ? 0 : 3, | ||||||
15184 | FD->getLocation())); | ||||||
15185 | } | ||||||
15186 | |||||||
15187 | if (Name->isStr("__CFStringMakeConstantString")) { | ||||||
15188 | // We already have a __builtin___CFStringMakeConstantString, | ||||||
15189 | // but builds that use -fno-constant-cfstrings don't go through that. | ||||||
15190 | if (!FD->hasAttr<FormatArgAttr>()) | ||||||
15191 | FD->addAttr(FormatArgAttr::CreateImplicit(Context, ParamIdx(1, FD), | ||||||
15192 | FD->getLocation())); | ||||||
15193 | } | ||||||
15194 | } | ||||||
15195 | |||||||
15196 | TypedefDecl *Sema::ParseTypedefDecl(Scope *S, Declarator &D, QualType T, | ||||||
15197 | TypeSourceInfo *TInfo) { | ||||||
15198 | assert(D.getIdentifier() && "Wrong callback for declspec without declarator")(static_cast <bool> (D.getIdentifier() && "Wrong callback for declspec without declarator" ) ? void (0) : __assert_fail ("D.getIdentifier() && \"Wrong callback for declspec without declarator\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15198, __extension__ __PRETTY_FUNCTION__)); | ||||||
15199 | assert(!T.isNull() && "GetTypeForDeclarator() returned null type")(static_cast <bool> (!T.isNull() && "GetTypeForDeclarator() returned null type" ) ? void (0) : __assert_fail ("!T.isNull() && \"GetTypeForDeclarator() returned null type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15199, __extension__ __PRETTY_FUNCTION__)); | ||||||
15200 | |||||||
15201 | if (!TInfo) { | ||||||
15202 | assert(D.isInvalidType() && "no declarator info for valid type")(static_cast <bool> (D.isInvalidType() && "no declarator info for valid type" ) ? void (0) : __assert_fail ("D.isInvalidType() && \"no declarator info for valid type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15202, __extension__ __PRETTY_FUNCTION__)); | ||||||
15203 | TInfo = Context.getTrivialTypeSourceInfo(T); | ||||||
15204 | } | ||||||
15205 | |||||||
15206 | // Scope manipulation handled by caller. | ||||||
15207 | TypedefDecl *NewTD = | ||||||
15208 | TypedefDecl::Create(Context, CurContext, D.getBeginLoc(), | ||||||
15209 | D.getIdentifierLoc(), D.getIdentifier(), TInfo); | ||||||
15210 | |||||||
15211 | // Bail out immediately if we have an invalid declaration. | ||||||
15212 | if (D.isInvalidType()) { | ||||||
15213 | NewTD->setInvalidDecl(); | ||||||
15214 | return NewTD; | ||||||
15215 | } | ||||||
15216 | |||||||
15217 | if (D.getDeclSpec().isModulePrivateSpecified()) { | ||||||
15218 | if (CurContext->isFunctionOrMethod()) | ||||||
15219 | Diag(NewTD->getLocation(), diag::err_module_private_local) | ||||||
15220 | << 2 << NewTD | ||||||
15221 | << SourceRange(D.getDeclSpec().getModulePrivateSpecLoc()) | ||||||
15222 | << FixItHint::CreateRemoval( | ||||||
15223 | D.getDeclSpec().getModulePrivateSpecLoc()); | ||||||
15224 | else | ||||||
15225 | NewTD->setModulePrivate(); | ||||||
15226 | } | ||||||
15227 | |||||||
15228 | // C++ [dcl.typedef]p8: | ||||||
15229 | // If the typedef declaration defines an unnamed class (or | ||||||
15230 | // enum), the first typedef-name declared by the declaration | ||||||
15231 | // to be that class type (or enum type) is used to denote the | ||||||
15232 | // class type (or enum type) for linkage purposes only. | ||||||
15233 | // We need to check whether the type was declared in the declaration. | ||||||
15234 | switch (D.getDeclSpec().getTypeSpecType()) { | ||||||
15235 | case TST_enum: | ||||||
15236 | case TST_struct: | ||||||
15237 | case TST_interface: | ||||||
15238 | case TST_union: | ||||||
15239 | case TST_class: { | ||||||
15240 | TagDecl *tagFromDeclSpec = cast<TagDecl>(D.getDeclSpec().getRepAsDecl()); | ||||||
15241 | setTagNameForLinkagePurposes(tagFromDeclSpec, NewTD); | ||||||
15242 | break; | ||||||
15243 | } | ||||||
15244 | |||||||
15245 | default: | ||||||
15246 | break; | ||||||
15247 | } | ||||||
15248 | |||||||
15249 | return NewTD; | ||||||
15250 | } | ||||||
15251 | |||||||
15252 | /// Check that this is a valid underlying type for an enum declaration. | ||||||
15253 | bool Sema::CheckEnumUnderlyingType(TypeSourceInfo *TI) { | ||||||
15254 | SourceLocation UnderlyingLoc = TI->getTypeLoc().getBeginLoc(); | ||||||
15255 | QualType T = TI->getType(); | ||||||
15256 | |||||||
15257 | if (T->isDependentType()) | ||||||
15258 | return false; | ||||||
15259 | |||||||
15260 | // This doesn't use 'isIntegralType' despite the error message mentioning | ||||||
15261 | // integral type because isIntegralType would also allow enum types in C. | ||||||
15262 | if (const BuiltinType *BT = T->getAs<BuiltinType>()) | ||||||
15263 | if (BT->isInteger()) | ||||||
15264 | return false; | ||||||
15265 | |||||||
15266 | if (T->isExtIntType()) | ||||||
15267 | return false; | ||||||
15268 | |||||||
15269 | return Diag(UnderlyingLoc, diag::err_enum_invalid_underlying) << T; | ||||||
15270 | } | ||||||
15271 | |||||||
15272 | /// Check whether this is a valid redeclaration of a previous enumeration. | ||||||
15273 | /// \return true if the redeclaration was invalid. | ||||||
15274 | bool Sema::CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, | ||||||
15275 | QualType EnumUnderlyingTy, bool IsFixed, | ||||||
15276 | const EnumDecl *Prev) { | ||||||
15277 | if (IsScoped != Prev->isScoped()) { | ||||||
15278 | Diag(EnumLoc, diag::err_enum_redeclare_scoped_mismatch) | ||||||
15279 | << Prev->isScoped(); | ||||||
15280 | Diag(Prev->getLocation(), diag::note_previous_declaration); | ||||||
15281 | return true; | ||||||
15282 | } | ||||||
15283 | |||||||
15284 | if (IsFixed && Prev->isFixed()) { | ||||||
15285 | if (!EnumUnderlyingTy->isDependentType() && | ||||||
15286 | !Prev->getIntegerType()->isDependentType() && | ||||||
15287 | !Context.hasSameUnqualifiedType(EnumUnderlyingTy, | ||||||
15288 | Prev->getIntegerType())) { | ||||||
15289 | // TODO: Highlight the underlying type of the redeclaration. | ||||||
15290 | Diag(EnumLoc, diag::err_enum_redeclare_type_mismatch) | ||||||
15291 | << EnumUnderlyingTy << Prev->getIntegerType(); | ||||||
15292 | Diag(Prev->getLocation(), diag::note_previous_declaration) | ||||||
15293 | << Prev->getIntegerTypeRange(); | ||||||
15294 | return true; | ||||||
15295 | } | ||||||
15296 | } else if (IsFixed != Prev->isFixed()) { | ||||||
15297 | Diag(EnumLoc, diag::err_enum_redeclare_fixed_mismatch) | ||||||
15298 | << Prev->isFixed(); | ||||||
15299 | Diag(Prev->getLocation(), diag::note_previous_declaration); | ||||||
15300 | return true; | ||||||
15301 | } | ||||||
15302 | |||||||
15303 | return false; | ||||||
15304 | } | ||||||
15305 | |||||||
15306 | /// Get diagnostic %select index for tag kind for | ||||||
15307 | /// redeclaration diagnostic message. | ||||||
15308 | /// WARNING: Indexes apply to particular diagnostics only! | ||||||
15309 | /// | ||||||
15310 | /// \returns diagnostic %select index. | ||||||
15311 | static unsigned getRedeclDiagFromTagKind(TagTypeKind Tag) { | ||||||
15312 | switch (Tag) { | ||||||
15313 | case TTK_Struct: return 0; | ||||||
15314 | case TTK_Interface: return 1; | ||||||
15315 | case TTK_Class: return 2; | ||||||
15316 | default: llvm_unreachable("Invalid tag kind for redecl diagnostic!")::llvm::llvm_unreachable_internal("Invalid tag kind for redecl diagnostic!" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15316); | ||||||
15317 | } | ||||||
15318 | } | ||||||
15319 | |||||||
15320 | /// Determine if tag kind is a class-key compatible with | ||||||
15321 | /// class for redeclaration (class, struct, or __interface). | ||||||
15322 | /// | ||||||
15323 | /// \returns true iff the tag kind is compatible. | ||||||
15324 | static bool isClassCompatTagKind(TagTypeKind Tag) | ||||||
15325 | { | ||||||
15326 | return Tag == TTK_Struct || Tag == TTK_Class || Tag == TTK_Interface; | ||||||
15327 | } | ||||||
15328 | |||||||
15329 | Sema::NonTagKind Sema::getNonTagTypeDeclKind(const Decl *PrevDecl, | ||||||
15330 | TagTypeKind TTK) { | ||||||
15331 | if (isa<TypedefDecl>(PrevDecl)) | ||||||
15332 | return NTK_Typedef; | ||||||
15333 | else if (isa<TypeAliasDecl>(PrevDecl)) | ||||||
15334 | return NTK_TypeAlias; | ||||||
15335 | else if (isa<ClassTemplateDecl>(PrevDecl)) | ||||||
15336 | return NTK_Template; | ||||||
15337 | else if (isa<TypeAliasTemplateDecl>(PrevDecl)) | ||||||
15338 | return NTK_TypeAliasTemplate; | ||||||
15339 | else if (isa<TemplateTemplateParmDecl>(PrevDecl)) | ||||||
15340 | return NTK_TemplateTemplateArgument; | ||||||
15341 | switch (TTK) { | ||||||
15342 | case TTK_Struct: | ||||||
15343 | case TTK_Interface: | ||||||
15344 | case TTK_Class: | ||||||
15345 | return getLangOpts().CPlusPlus ? NTK_NonClass : NTK_NonStruct; | ||||||
15346 | case TTK_Union: | ||||||
15347 | return NTK_NonUnion; | ||||||
15348 | case TTK_Enum: | ||||||
15349 | return NTK_NonEnum; | ||||||
15350 | } | ||||||
15351 | llvm_unreachable("invalid TTK")::llvm::llvm_unreachable_internal("invalid TTK", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15351); | ||||||
15352 | } | ||||||
15353 | |||||||
15354 | /// Determine whether a tag with a given kind is acceptable | ||||||
15355 | /// as a redeclaration of the given tag declaration. | ||||||
15356 | /// | ||||||
15357 | /// \returns true if the new tag kind is acceptable, false otherwise. | ||||||
15358 | bool Sema::isAcceptableTagRedeclaration(const TagDecl *Previous, | ||||||
15359 | TagTypeKind NewTag, bool isDefinition, | ||||||
15360 | SourceLocation NewTagLoc, | ||||||
15361 | const IdentifierInfo *Name) { | ||||||
15362 | // C++ [dcl.type.elab]p3: | ||||||
15363 | // The class-key or enum keyword present in the | ||||||
15364 | // elaborated-type-specifier shall agree in kind with the | ||||||
15365 | // declaration to which the name in the elaborated-type-specifier | ||||||
15366 | // refers. This rule also applies to the form of | ||||||
15367 | // elaborated-type-specifier that declares a class-name or | ||||||
15368 | // friend class since it can be construed as referring to the | ||||||
15369 | // definition of the class. Thus, in any | ||||||
15370 | // elaborated-type-specifier, the enum keyword shall be used to | ||||||
15371 | // refer to an enumeration (7.2), the union class-key shall be | ||||||
15372 | // used to refer to a union (clause 9), and either the class or | ||||||
15373 | // struct class-key shall be used to refer to a class (clause 9) | ||||||
15374 | // declared using the class or struct class-key. | ||||||
15375 | TagTypeKind OldTag = Previous->getTagKind(); | ||||||
15376 | if (OldTag != NewTag && | ||||||
15377 | !(isClassCompatTagKind(OldTag) && isClassCompatTagKind(NewTag))) | ||||||
15378 | return false; | ||||||
15379 | |||||||
15380 | // Tags are compatible, but we might still want to warn on mismatched tags. | ||||||
15381 | // Non-class tags can't be mismatched at this point. | ||||||
15382 | if (!isClassCompatTagKind(NewTag)) | ||||||
15383 | return true; | ||||||
15384 | |||||||
15385 | // Declarations for which -Wmismatched-tags is disabled are entirely ignored | ||||||
15386 | // by our warning analysis. We don't want to warn about mismatches with (eg) | ||||||
15387 | // declarations in system headers that are designed to be specialized, but if | ||||||
15388 | // a user asks us to warn, we should warn if their code contains mismatched | ||||||
15389 | // declarations. | ||||||
15390 | auto IsIgnoredLoc = [&](SourceLocation Loc) { | ||||||
15391 | return getDiagnostics().isIgnored(diag::warn_struct_class_tag_mismatch, | ||||||
15392 | Loc); | ||||||
15393 | }; | ||||||
15394 | if (IsIgnoredLoc(NewTagLoc)) | ||||||
15395 | return true; | ||||||
15396 | |||||||
15397 | auto IsIgnored = [&](const TagDecl *Tag) { | ||||||
15398 | return IsIgnoredLoc(Tag->getLocation()); | ||||||
15399 | }; | ||||||
15400 | while (IsIgnored(Previous)) { | ||||||
15401 | Previous = Previous->getPreviousDecl(); | ||||||
15402 | if (!Previous) | ||||||
15403 | return true; | ||||||
15404 | OldTag = Previous->getTagKind(); | ||||||
15405 | } | ||||||
15406 | |||||||
15407 | bool isTemplate = false; | ||||||
15408 | if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(Previous)) | ||||||
15409 | isTemplate = Record->getDescribedClassTemplate(); | ||||||
15410 | |||||||
15411 | if (inTemplateInstantiation()) { | ||||||
15412 | if (OldTag != NewTag) { | ||||||
15413 | // In a template instantiation, do not offer fix-its for tag mismatches | ||||||
15414 | // since they usually mess up the template instead of fixing the problem. | ||||||
15415 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) | ||||||
15416 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
15417 | << getRedeclDiagFromTagKind(OldTag); | ||||||
15418 | // FIXME: Note previous location? | ||||||
15419 | } | ||||||
15420 | return true; | ||||||
15421 | } | ||||||
15422 | |||||||
15423 | if (isDefinition) { | ||||||
15424 | // On definitions, check all previous tags and issue a fix-it for each | ||||||
15425 | // one that doesn't match the current tag. | ||||||
15426 | if (Previous->getDefinition()) { | ||||||
15427 | // Don't suggest fix-its for redefinitions. | ||||||
15428 | return true; | ||||||
15429 | } | ||||||
15430 | |||||||
15431 | bool previousMismatch = false; | ||||||
15432 | for (const TagDecl *I : Previous->redecls()) { | ||||||
15433 | if (I->getTagKind() != NewTag) { | ||||||
15434 | // Ignore previous declarations for which the warning was disabled. | ||||||
15435 | if (IsIgnored(I)) | ||||||
15436 | continue; | ||||||
15437 | |||||||
15438 | if (!previousMismatch) { | ||||||
15439 | previousMismatch = true; | ||||||
15440 | Diag(NewTagLoc, diag::warn_struct_class_previous_tag_mismatch) | ||||||
15441 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
15442 | << getRedeclDiagFromTagKind(I->getTagKind()); | ||||||
15443 | } | ||||||
15444 | Diag(I->getInnerLocStart(), diag::note_struct_class_suggestion) | ||||||
15445 | << getRedeclDiagFromTagKind(NewTag) | ||||||
15446 | << FixItHint::CreateReplacement(I->getInnerLocStart(), | ||||||
15447 | TypeWithKeyword::getTagTypeKindName(NewTag)); | ||||||
15448 | } | ||||||
15449 | } | ||||||
15450 | return true; | ||||||
15451 | } | ||||||
15452 | |||||||
15453 | // Identify the prevailing tag kind: this is the kind of the definition (if | ||||||
15454 | // there is a non-ignored definition), or otherwise the kind of the prior | ||||||
15455 | // (non-ignored) declaration. | ||||||
15456 | const TagDecl *PrevDef = Previous->getDefinition(); | ||||||
15457 | if (PrevDef && IsIgnored(PrevDef)) | ||||||
15458 | PrevDef = nullptr; | ||||||
15459 | const TagDecl *Redecl = PrevDef ? PrevDef : Previous; | ||||||
15460 | if (Redecl->getTagKind() != NewTag) { | ||||||
15461 | Diag(NewTagLoc, diag::warn_struct_class_tag_mismatch) | ||||||
15462 | << getRedeclDiagFromTagKind(NewTag) << isTemplate << Name | ||||||
15463 | << getRedeclDiagFromTagKind(OldTag); | ||||||
15464 | Diag(Redecl->getLocation(), diag::note_previous_use); | ||||||
15465 | |||||||
15466 | // If there is a previous definition, suggest a fix-it. | ||||||
15467 | if (PrevDef) { | ||||||
15468 | Diag(NewTagLoc, diag::note_struct_class_suggestion) | ||||||
15469 | << getRedeclDiagFromTagKind(Redecl->getTagKind()) | ||||||
15470 | << FixItHint::CreateReplacement(SourceRange(NewTagLoc), | ||||||
15471 | TypeWithKeyword::getTagTypeKindName(Redecl->getTagKind())); | ||||||
15472 | } | ||||||
15473 | } | ||||||
15474 | |||||||
15475 | return true; | ||||||
15476 | } | ||||||
15477 | |||||||
15478 | /// Add a minimal nested name specifier fixit hint to allow lookup of a tag name | ||||||
15479 | /// from an outer enclosing namespace or file scope inside a friend declaration. | ||||||
15480 | /// This should provide the commented out code in the following snippet: | ||||||
15481 | /// namespace N { | ||||||
15482 | /// struct X; | ||||||
15483 | /// namespace M { | ||||||
15484 | /// struct Y { friend struct /*N::*/ X; }; | ||||||
15485 | /// } | ||||||
15486 | /// } | ||||||
15487 | static FixItHint createFriendTagNNSFixIt(Sema &SemaRef, NamedDecl *ND, Scope *S, | ||||||
15488 | SourceLocation NameLoc) { | ||||||
15489 | // While the decl is in a namespace, do repeated lookup of that name and see | ||||||
15490 | // if we get the same namespace back. If we do not, continue until | ||||||
15491 | // translation unit scope, at which point we have a fully qualified NNS. | ||||||
15492 | SmallVector<IdentifierInfo *, 4> Namespaces; | ||||||
15493 | DeclContext *DC = ND->getDeclContext()->getRedeclContext(); | ||||||
15494 | for (; !DC->isTranslationUnit(); DC = DC->getParent()) { | ||||||
15495 | // This tag should be declared in a namespace, which can only be enclosed by | ||||||
15496 | // other namespaces. Bail if there's an anonymous namespace in the chain. | ||||||
15497 | NamespaceDecl *Namespace = dyn_cast<NamespaceDecl>(DC); | ||||||
15498 | if (!Namespace || Namespace->isAnonymousNamespace()) | ||||||
15499 | return FixItHint(); | ||||||
15500 | IdentifierInfo *II = Namespace->getIdentifier(); | ||||||
15501 | Namespaces.push_back(II); | ||||||
15502 | NamedDecl *Lookup = SemaRef.LookupSingleName( | ||||||
15503 | S, II, NameLoc, Sema::LookupNestedNameSpecifierName); | ||||||
15504 | if (Lookup == Namespace) | ||||||
15505 | break; | ||||||
15506 | } | ||||||
15507 | |||||||
15508 | // Once we have all the namespaces, reverse them to go outermost first, and | ||||||
15509 | // build an NNS. | ||||||
15510 | SmallString<64> Insertion; | ||||||
15511 | llvm::raw_svector_ostream OS(Insertion); | ||||||
15512 | if (DC->isTranslationUnit()) | ||||||
15513 | OS << "::"; | ||||||
15514 | std::reverse(Namespaces.begin(), Namespaces.end()); | ||||||
15515 | for (auto *II : Namespaces) | ||||||
15516 | OS << II->getName() << "::"; | ||||||
15517 | return FixItHint::CreateInsertion(NameLoc, Insertion); | ||||||
15518 | } | ||||||
15519 | |||||||
15520 | /// Determine whether a tag originally declared in context \p OldDC can | ||||||
15521 | /// be redeclared with an unqualified name in \p NewDC (assuming name lookup | ||||||
15522 | /// found a declaration in \p OldDC as a previous decl, perhaps through a | ||||||
15523 | /// using-declaration). | ||||||
15524 | static bool isAcceptableTagRedeclContext(Sema &S, DeclContext *OldDC, | ||||||
15525 | DeclContext *NewDC) { | ||||||
15526 | OldDC = OldDC->getRedeclContext(); | ||||||
15527 | NewDC = NewDC->getRedeclContext(); | ||||||
15528 | |||||||
15529 | if (OldDC->Equals(NewDC)) | ||||||
15530 | return true; | ||||||
15531 | |||||||
15532 | // In MSVC mode, we allow a redeclaration if the contexts are related (either | ||||||
15533 | // encloses the other). | ||||||
15534 | if (S.getLangOpts().MSVCCompat && | ||||||
15535 | (OldDC->Encloses(NewDC) || NewDC->Encloses(OldDC))) | ||||||
15536 | return true; | ||||||
15537 | |||||||
15538 | return false; | ||||||
15539 | } | ||||||
15540 | |||||||
15541 | /// This is invoked when we see 'struct foo' or 'struct {'. In the | ||||||
15542 | /// former case, Name will be non-null. In the later case, Name will be null. | ||||||
15543 | /// TagSpec indicates what kind of tag this is. TUK indicates whether this is a | ||||||
15544 | /// reference/declaration/definition of a tag. | ||||||
15545 | /// | ||||||
15546 | /// \param IsTypeSpecifier \c true if this is a type-specifier (or | ||||||
15547 | /// trailing-type-specifier) other than one in an alias-declaration. | ||||||
15548 | /// | ||||||
15549 | /// \param SkipBody If non-null, will be set to indicate if the caller should | ||||||
15550 | /// skip the definition of this tag and treat it as if it were a declaration. | ||||||
15551 | Decl *Sema::ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, | ||||||
15552 | SourceLocation KWLoc, CXXScopeSpec &SS, | ||||||
15553 | IdentifierInfo *Name, SourceLocation NameLoc, | ||||||
15554 | const ParsedAttributesView &Attrs, AccessSpecifier AS, | ||||||
15555 | SourceLocation ModulePrivateLoc, | ||||||
15556 | MultiTemplateParamsArg TemplateParameterLists, | ||||||
15557 | bool &OwnedDecl, bool &IsDependent, | ||||||
15558 | SourceLocation ScopedEnumKWLoc, | ||||||
15559 | bool ScopedEnumUsesClassTag, TypeResult UnderlyingType, | ||||||
15560 | bool IsTypeSpecifier, bool IsTemplateParamOrArg, | ||||||
15561 | SkipBodyInfo *SkipBody) { | ||||||
15562 | // If this is not a definition, it must have a name. | ||||||
15563 | IdentifierInfo *OrigName = Name; | ||||||
15564 | assert((Name != nullptr || TUK == TUK_Definition) &&(static_cast <bool> ((Name != nullptr || TUK == TUK_Definition ) && "Nameless record must be a definition!") ? void ( 0) : __assert_fail ("(Name != nullptr || TUK == TUK_Definition) && \"Nameless record must be a definition!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15565, __extension__ __PRETTY_FUNCTION__)) | ||||||
15565 | "Nameless record must be a definition!")(static_cast <bool> ((Name != nullptr || TUK == TUK_Definition ) && "Nameless record must be a definition!") ? void ( 0) : __assert_fail ("(Name != nullptr || TUK == TUK_Definition) && \"Nameless record must be a definition!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15565, __extension__ __PRETTY_FUNCTION__)); | ||||||
15566 | assert(TemplateParameterLists.size() == 0 || TUK != TUK_Reference)(static_cast <bool> (TemplateParameterLists.size() == 0 || TUK != TUK_Reference) ? void (0) : __assert_fail ("TemplateParameterLists.size() == 0 || TUK != TUK_Reference" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15566, __extension__ __PRETTY_FUNCTION__)); | ||||||
15567 | |||||||
15568 | OwnedDecl = false; | ||||||
15569 | TagTypeKind Kind = TypeWithKeyword::getTagTypeKindForTypeSpec(TagSpec); | ||||||
15570 | bool ScopedEnum = ScopedEnumKWLoc.isValid(); | ||||||
15571 | |||||||
15572 | // FIXME: Check member specializations more carefully. | ||||||
15573 | bool isMemberSpecialization = false; | ||||||
15574 | bool Invalid = false; | ||||||
15575 | |||||||
15576 | // We only need to do this matching if we have template parameters | ||||||
15577 | // or a scope specifier, which also conveniently avoids this work | ||||||
15578 | // for non-C++ cases. | ||||||
15579 | if (TemplateParameterLists.size() > 0 || | ||||||
15580 | (SS.isNotEmpty() && TUK != TUK_Reference)) { | ||||||
15581 | if (TemplateParameterList *TemplateParams = | ||||||
15582 | MatchTemplateParametersToScopeSpecifier( | ||||||
15583 | KWLoc, NameLoc, SS, nullptr, TemplateParameterLists, | ||||||
15584 | TUK == TUK_Friend, isMemberSpecialization, Invalid)) { | ||||||
15585 | if (Kind == TTK_Enum) { | ||||||
15586 | Diag(KWLoc, diag::err_enum_template); | ||||||
15587 | return nullptr; | ||||||
15588 | } | ||||||
15589 | |||||||
15590 | if (TemplateParams->size() > 0) { | ||||||
15591 | // This is a declaration or definition of a class template (which may | ||||||
15592 | // be a member of another template). | ||||||
15593 | |||||||
15594 | if (Invalid) | ||||||
15595 | return nullptr; | ||||||
15596 | |||||||
15597 | OwnedDecl = false; | ||||||
15598 | DeclResult Result = CheckClassTemplate( | ||||||
15599 | S, TagSpec, TUK, KWLoc, SS, Name, NameLoc, Attrs, TemplateParams, | ||||||
15600 | AS, ModulePrivateLoc, | ||||||
15601 | /*FriendLoc*/ SourceLocation(), TemplateParameterLists.size() - 1, | ||||||
15602 | TemplateParameterLists.data(), SkipBody); | ||||||
15603 | return Result.get(); | ||||||
15604 | } else { | ||||||
15605 | // The "template<>" header is extraneous. | ||||||
15606 | Diag(TemplateParams->getTemplateLoc(), diag::err_template_tag_noparams) | ||||||
15607 | << TypeWithKeyword::getTagTypeKindName(Kind) << Name; | ||||||
15608 | isMemberSpecialization = true; | ||||||
15609 | } | ||||||
15610 | } | ||||||
15611 | |||||||
15612 | if (!TemplateParameterLists.empty() && isMemberSpecialization && | ||||||
15613 | CheckTemplateDeclScope(S, TemplateParameterLists.back())) | ||||||
15614 | return nullptr; | ||||||
15615 | } | ||||||
15616 | |||||||
15617 | // Figure out the underlying type if this a enum declaration. We need to do | ||||||
15618 | // this early, because it's needed to detect if this is an incompatible | ||||||
15619 | // redeclaration. | ||||||
15620 | llvm::PointerUnion<const Type*, TypeSourceInfo*> EnumUnderlying; | ||||||
15621 | bool IsFixed = !UnderlyingType.isUnset() || ScopedEnum; | ||||||
15622 | |||||||
15623 | if (Kind == TTK_Enum) { | ||||||
15624 | if (UnderlyingType.isInvalid() || (!UnderlyingType.get() && ScopedEnum)) { | ||||||
15625 | // No underlying type explicitly specified, or we failed to parse the | ||||||
15626 | // type, default to int. | ||||||
15627 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15628 | } else if (UnderlyingType.get()) { | ||||||
15629 | // C++0x 7.2p2: The type-specifier-seq of an enum-base shall name an | ||||||
15630 | // integral type; any cv-qualification is ignored. | ||||||
15631 | TypeSourceInfo *TI = nullptr; | ||||||
15632 | GetTypeFromParser(UnderlyingType.get(), &TI); | ||||||
15633 | EnumUnderlying = TI; | ||||||
15634 | |||||||
15635 | if (CheckEnumUnderlyingType(TI)) | ||||||
15636 | // Recover by falling back to int. | ||||||
15637 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15638 | |||||||
15639 | if (DiagnoseUnexpandedParameterPack(TI->getTypeLoc().getBeginLoc(), TI, | ||||||
15640 | UPPC_FixedUnderlyingType)) | ||||||
15641 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15642 | |||||||
15643 | } else if (Context.getTargetInfo().getTriple().isWindowsMSVCEnvironment()) { | ||||||
15644 | // For MSVC ABI compatibility, unfixed enums must use an underlying type | ||||||
15645 | // of 'int'. However, if this is an unfixed forward declaration, don't set | ||||||
15646 | // the underlying type unless the user enables -fms-compatibility. This | ||||||
15647 | // makes unfixed forward declared enums incomplete and is more conforming. | ||||||
15648 | if (TUK == TUK_Definition || getLangOpts().MSVCCompat) | ||||||
15649 | EnumUnderlying = Context.IntTy.getTypePtr(); | ||||||
15650 | } | ||||||
15651 | } | ||||||
15652 | |||||||
15653 | DeclContext *SearchDC = CurContext; | ||||||
15654 | DeclContext *DC = CurContext; | ||||||
15655 | bool isStdBadAlloc = false; | ||||||
15656 | bool isStdAlignValT = false; | ||||||
15657 | |||||||
15658 | RedeclarationKind Redecl = forRedeclarationInCurContext(); | ||||||
15659 | if (TUK == TUK_Friend || TUK == TUK_Reference) | ||||||
15660 | Redecl = NotForRedeclaration; | ||||||
15661 | |||||||
15662 | /// Create a new tag decl in C/ObjC. Since the ODR-like semantics for ObjC/C | ||||||
15663 | /// implemented asks for structural equivalence checking, the returned decl | ||||||
15664 | /// here is passed back to the parser, allowing the tag body to be parsed. | ||||||
15665 | auto createTagFromNewDecl = [&]() -> TagDecl * { | ||||||
15666 | assert(!getLangOpts().CPlusPlus && "not meant for C++ usage")(static_cast <bool> (!getLangOpts().CPlusPlus && "not meant for C++ usage") ? void (0) : __assert_fail ("!getLangOpts().CPlusPlus && \"not meant for C++ usage\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15666, __extension__ __PRETTY_FUNCTION__)); | ||||||
15667 | // If there is an identifier, use the location of the identifier as the | ||||||
15668 | // location of the decl, otherwise use the location of the struct/union | ||||||
15669 | // keyword. | ||||||
15670 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; | ||||||
15671 | TagDecl *New = nullptr; | ||||||
15672 | |||||||
15673 | if (Kind == TTK_Enum) { | ||||||
15674 | New = EnumDecl::Create(Context, SearchDC, KWLoc, Loc, Name, nullptr, | ||||||
15675 | ScopedEnum, ScopedEnumUsesClassTag, IsFixed); | ||||||
15676 | // If this is an undefined enum, bail. | ||||||
15677 | if (TUK != TUK_Definition && !Invalid) | ||||||
15678 | return nullptr; | ||||||
15679 | if (EnumUnderlying) { | ||||||
15680 | EnumDecl *ED = cast<EnumDecl>(New); | ||||||
15681 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo *>()) | ||||||
15682 | ED->setIntegerTypeSourceInfo(TI); | ||||||
15683 | else | ||||||
15684 | ED->setIntegerType(QualType(EnumUnderlying.get<const Type *>(), 0)); | ||||||
15685 | ED->setPromotionType(ED->getIntegerType()); | ||||||
15686 | } | ||||||
15687 | } else { // struct/union | ||||||
15688 | New = RecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
15689 | nullptr); | ||||||
15690 | } | ||||||
15691 | |||||||
15692 | if (RecordDecl *RD = dyn_cast<RecordDecl>(New)) { | ||||||
15693 | // Add alignment attributes if necessary; these attributes are checked | ||||||
15694 | // when the ASTContext lays out the structure. | ||||||
15695 | // | ||||||
15696 | // It is important for implementing the correct semantics that this | ||||||
15697 | // happen here (in ActOnTag). The #pragma pack stack is | ||||||
15698 | // maintained as a result of parser callbacks which can occur at | ||||||
15699 | // many points during the parsing of a struct declaration (because | ||||||
15700 | // the #pragma tokens are effectively skipped over during the | ||||||
15701 | // parsing of the struct). | ||||||
15702 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) { | ||||||
15703 | AddAlignmentAttributesForRecord(RD); | ||||||
15704 | AddMsStructLayoutForRecord(RD); | ||||||
15705 | } | ||||||
15706 | } | ||||||
15707 | New->setLexicalDeclContext(CurContext); | ||||||
15708 | return New; | ||||||
15709 | }; | ||||||
15710 | |||||||
15711 | LookupResult Previous(*this, Name, NameLoc, LookupTagName, Redecl); | ||||||
15712 | if (Name && SS.isNotEmpty()) { | ||||||
15713 | // We have a nested-name tag ('struct foo::bar'). | ||||||
15714 | |||||||
15715 | // Check for invalid 'foo::'. | ||||||
15716 | if (SS.isInvalid()) { | ||||||
15717 | Name = nullptr; | ||||||
15718 | goto CreateNewDecl; | ||||||
15719 | } | ||||||
15720 | |||||||
15721 | // If this is a friend or a reference to a class in a dependent | ||||||
15722 | // context, don't try to make a decl for it. | ||||||
15723 | if (TUK == TUK_Friend || TUK == TUK_Reference) { | ||||||
15724 | DC = computeDeclContext(SS, false); | ||||||
15725 | if (!DC) { | ||||||
15726 | IsDependent = true; | ||||||
15727 | return nullptr; | ||||||
15728 | } | ||||||
15729 | } else { | ||||||
15730 | DC = computeDeclContext(SS, true); | ||||||
15731 | if (!DC) { | ||||||
15732 | Diag(SS.getRange().getBegin(), diag::err_dependent_nested_name_spec) | ||||||
15733 | << SS.getRange(); | ||||||
15734 | return nullptr; | ||||||
15735 | } | ||||||
15736 | } | ||||||
15737 | |||||||
15738 | if (RequireCompleteDeclContext(SS, DC)) | ||||||
15739 | return nullptr; | ||||||
15740 | |||||||
15741 | SearchDC = DC; | ||||||
15742 | // Look-up name inside 'foo::'. | ||||||
15743 | LookupQualifiedName(Previous, DC); | ||||||
15744 | |||||||
15745 | if (Previous.isAmbiguous()) | ||||||
15746 | return nullptr; | ||||||
15747 | |||||||
15748 | if (Previous.empty()) { | ||||||
15749 | // Name lookup did not find anything. However, if the | ||||||
15750 | // nested-name-specifier refers to the current instantiation, | ||||||
15751 | // and that current instantiation has any dependent base | ||||||
15752 | // classes, we might find something at instantiation time: treat | ||||||
15753 | // this as a dependent elaborated-type-specifier. | ||||||
15754 | // But this only makes any sense for reference-like lookups. | ||||||
15755 | if (Previous.wasNotFoundInCurrentInstantiation() && | ||||||
15756 | (TUK == TUK_Reference || TUK == TUK_Friend)) { | ||||||
15757 | IsDependent = true; | ||||||
15758 | return nullptr; | ||||||
15759 | } | ||||||
15760 | |||||||
15761 | // A tag 'foo::bar' must already exist. | ||||||
15762 | Diag(NameLoc, diag::err_not_tag_in_scope) | ||||||
15763 | << Kind << Name << DC << SS.getRange(); | ||||||
15764 | Name = nullptr; | ||||||
15765 | Invalid = true; | ||||||
15766 | goto CreateNewDecl; | ||||||
15767 | } | ||||||
15768 | } else if (Name) { | ||||||
15769 | // C++14 [class.mem]p14: | ||||||
15770 | // If T is the name of a class, then each of the following shall have a | ||||||
15771 | // name different from T: | ||||||
15772 | // -- every member of class T that is itself a type | ||||||
15773 | if (TUK != TUK_Reference && TUK != TUK_Friend && | ||||||
15774 | DiagnoseClassNameShadow(SearchDC, DeclarationNameInfo(Name, NameLoc))) | ||||||
15775 | return nullptr; | ||||||
15776 | |||||||
15777 | // If this is a named struct, check to see if there was a previous forward | ||||||
15778 | // declaration or definition. | ||||||
15779 | // FIXME: We're looking into outer scopes here, even when we | ||||||
15780 | // shouldn't be. Doing so can result in ambiguities that we | ||||||
15781 | // shouldn't be diagnosing. | ||||||
15782 | LookupName(Previous, S); | ||||||
15783 | |||||||
15784 | // When declaring or defining a tag, ignore ambiguities introduced | ||||||
15785 | // by types using'ed into this scope. | ||||||
15786 | if (Previous.isAmbiguous() && | ||||||
15787 | (TUK == TUK_Definition || TUK == TUK_Declaration)) { | ||||||
15788 | LookupResult::Filter F = Previous.makeFilter(); | ||||||
15789 | while (F.hasNext()) { | ||||||
15790 | NamedDecl *ND = F.next(); | ||||||
15791 | if (!ND->getDeclContext()->getRedeclContext()->Equals( | ||||||
15792 | SearchDC->getRedeclContext())) | ||||||
15793 | F.erase(); | ||||||
15794 | } | ||||||
15795 | F.done(); | ||||||
15796 | } | ||||||
15797 | |||||||
15798 | // C++11 [namespace.memdef]p3: | ||||||
15799 | // If the name in a friend declaration is neither qualified nor | ||||||
15800 | // a template-id and the declaration is a function or an | ||||||
15801 | // elaborated-type-specifier, the lookup to determine whether | ||||||
15802 | // the entity has been previously declared shall not consider | ||||||
15803 | // any scopes outside the innermost enclosing namespace. | ||||||
15804 | // | ||||||
15805 | // MSVC doesn't implement the above rule for types, so a friend tag | ||||||
15806 | // declaration may be a redeclaration of a type declared in an enclosing | ||||||
15807 | // scope. They do implement this rule for friend functions. | ||||||
15808 | // | ||||||
15809 | // Does it matter that this should be by scope instead of by | ||||||
15810 | // semantic context? | ||||||
15811 | if (!Previous.empty() && TUK == TUK_Friend) { | ||||||
15812 | DeclContext *EnclosingNS = SearchDC->getEnclosingNamespaceContext(); | ||||||
15813 | LookupResult::Filter F = Previous.makeFilter(); | ||||||
15814 | bool FriendSawTagOutsideEnclosingNamespace = false; | ||||||
15815 | while (F.hasNext()) { | ||||||
15816 | NamedDecl *ND = F.next(); | ||||||
15817 | DeclContext *DC = ND->getDeclContext()->getRedeclContext(); | ||||||
15818 | if (DC->isFileContext() && | ||||||
15819 | !EnclosingNS->Encloses(ND->getDeclContext())) { | ||||||
15820 | if (getLangOpts().MSVCCompat) | ||||||
15821 | FriendSawTagOutsideEnclosingNamespace = true; | ||||||
15822 | else | ||||||
15823 | F.erase(); | ||||||
15824 | } | ||||||
15825 | } | ||||||
15826 | F.done(); | ||||||
15827 | |||||||
15828 | // Diagnose this MSVC extension in the easy case where lookup would have | ||||||
15829 | // unambiguously found something outside the enclosing namespace. | ||||||
15830 | if (Previous.isSingleResult() && FriendSawTagOutsideEnclosingNamespace) { | ||||||
15831 | NamedDecl *ND = Previous.getFoundDecl(); | ||||||
15832 | Diag(NameLoc, diag::ext_friend_tag_redecl_outside_namespace) | ||||||
15833 | << createFriendTagNNSFixIt(*this, ND, S, NameLoc); | ||||||
15834 | } | ||||||
15835 | } | ||||||
15836 | |||||||
15837 | // Note: there used to be some attempt at recovery here. | ||||||
15838 | if (Previous.isAmbiguous()) | ||||||
15839 | return nullptr; | ||||||
15840 | |||||||
15841 | if (!getLangOpts().CPlusPlus && TUK != TUK_Reference) { | ||||||
15842 | // FIXME: This makes sure that we ignore the contexts associated | ||||||
15843 | // with C structs, unions, and enums when looking for a matching | ||||||
15844 | // tag declaration or definition. See the similar lookup tweak | ||||||
15845 | // in Sema::LookupName; is there a better way to deal with this? | ||||||
15846 | while (isa<RecordDecl>(SearchDC) || isa<EnumDecl>(SearchDC)) | ||||||
15847 | SearchDC = SearchDC->getParent(); | ||||||
15848 | } | ||||||
15849 | } | ||||||
15850 | |||||||
15851 | if (Previous.isSingleResult() && | ||||||
15852 | Previous.getFoundDecl()->isTemplateParameter()) { | ||||||
15853 | // Maybe we will complain about the shadowed template parameter. | ||||||
15854 | DiagnoseTemplateParameterShadow(NameLoc, Previous.getFoundDecl()); | ||||||
15855 | // Just pretend that we didn't see the previous declaration. | ||||||
15856 | Previous.clear(); | ||||||
15857 | } | ||||||
15858 | |||||||
15859 | if (getLangOpts().CPlusPlus && Name && DC && StdNamespace && | ||||||
15860 | DC->Equals(getStdNamespace())) { | ||||||
15861 | if (Name->isStr("bad_alloc")) { | ||||||
15862 | // This is a declaration of or a reference to "std::bad_alloc". | ||||||
15863 | isStdBadAlloc = true; | ||||||
15864 | |||||||
15865 | // If std::bad_alloc has been implicitly declared (but made invisible to | ||||||
15866 | // name lookup), fill in this implicit declaration as the previous | ||||||
15867 | // declaration, so that the declarations get chained appropriately. | ||||||
15868 | if (Previous.empty() && StdBadAlloc) | ||||||
15869 | Previous.addDecl(getStdBadAlloc()); | ||||||
15870 | } else if (Name->isStr("align_val_t")) { | ||||||
15871 | isStdAlignValT = true; | ||||||
15872 | if (Previous.empty() && StdAlignValT) | ||||||
15873 | Previous.addDecl(getStdAlignValT()); | ||||||
15874 | } | ||||||
15875 | } | ||||||
15876 | |||||||
15877 | // If we didn't find a previous declaration, and this is a reference | ||||||
15878 | // (or friend reference), move to the correct scope. In C++, we | ||||||
15879 | // also need to do a redeclaration lookup there, just in case | ||||||
15880 | // there's a shadow friend decl. | ||||||
15881 | if (Name && Previous.empty() && | ||||||
15882 | (TUK == TUK_Reference || TUK == TUK_Friend || IsTemplateParamOrArg)) { | ||||||
15883 | if (Invalid) goto CreateNewDecl; | ||||||
15884 | assert(SS.isEmpty())(static_cast <bool> (SS.isEmpty()) ? void (0) : __assert_fail ("SS.isEmpty()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15884, __extension__ __PRETTY_FUNCTION__)); | ||||||
15885 | |||||||
15886 | if (TUK == TUK_Reference || IsTemplateParamOrArg) { | ||||||
15887 | // C++ [basic.scope.pdecl]p5: | ||||||
15888 | // -- for an elaborated-type-specifier of the form | ||||||
15889 | // | ||||||
15890 | // class-key identifier | ||||||
15891 | // | ||||||
15892 | // if the elaborated-type-specifier is used in the | ||||||
15893 | // decl-specifier-seq or parameter-declaration-clause of a | ||||||
15894 | // function defined in namespace scope, the identifier is | ||||||
15895 | // declared as a class-name in the namespace that contains | ||||||
15896 | // the declaration; otherwise, except as a friend | ||||||
15897 | // declaration, the identifier is declared in the smallest | ||||||
15898 | // non-class, non-function-prototype scope that contains the | ||||||
15899 | // declaration. | ||||||
15900 | // | ||||||
15901 | // C99 6.7.2.3p8 has a similar (but not identical!) provision for | ||||||
15902 | // C structs and unions. | ||||||
15903 | // | ||||||
15904 | // It is an error in C++ to declare (rather than define) an enum | ||||||
15905 | // type, including via an elaborated type specifier. We'll | ||||||
15906 | // diagnose that later; for now, declare the enum in the same | ||||||
15907 | // scope as we would have picked for any other tag type. | ||||||
15908 | // | ||||||
15909 | // GNU C also supports this behavior as part of its incomplete | ||||||
15910 | // enum types extension, while GNU C++ does not. | ||||||
15911 | // | ||||||
15912 | // Find the context where we'll be declaring the tag. | ||||||
15913 | // FIXME: We would like to maintain the current DeclContext as the | ||||||
15914 | // lexical context, | ||||||
15915 | SearchDC = getTagInjectionContext(SearchDC); | ||||||
15916 | |||||||
15917 | // Find the scope where we'll be declaring the tag. | ||||||
15918 | S = getTagInjectionScope(S, getLangOpts()); | ||||||
15919 | } else { | ||||||
15920 | assert(TUK == TUK_Friend)(static_cast <bool> (TUK == TUK_Friend) ? void (0) : __assert_fail ("TUK == TUK_Friend", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 15920, __extension__ __PRETTY_FUNCTION__)); | ||||||
15921 | // C++ [namespace.memdef]p3: | ||||||
15922 | // If a friend declaration in a non-local class first declares a | ||||||
15923 | // class or function, the friend class or function is a member of | ||||||
15924 | // the innermost enclosing namespace. | ||||||
15925 | SearchDC = SearchDC->getEnclosingNamespaceContext(); | ||||||
15926 | } | ||||||
15927 | |||||||
15928 | // In C++, we need to do a redeclaration lookup to properly | ||||||
15929 | // diagnose some problems. | ||||||
15930 | // FIXME: redeclaration lookup is also used (with and without C++) to find a | ||||||
15931 | // hidden declaration so that we don't get ambiguity errors when using a | ||||||
15932 | // type declared by an elaborated-type-specifier. In C that is not correct | ||||||
15933 | // and we should instead merge compatible types found by lookup. | ||||||
15934 | if (getLangOpts().CPlusPlus) { | ||||||
15935 | // FIXME: This can perform qualified lookups into function contexts, | ||||||
15936 | // which are meaningless. | ||||||
15937 | Previous.setRedeclarationKind(forRedeclarationInCurContext()); | ||||||
15938 | LookupQualifiedName(Previous, SearchDC); | ||||||
15939 | } else { | ||||||
15940 | Previous.setRedeclarationKind(forRedeclarationInCurContext()); | ||||||
15941 | LookupName(Previous, S); | ||||||
15942 | } | ||||||
15943 | } | ||||||
15944 | |||||||
15945 | // If we have a known previous declaration to use, then use it. | ||||||
15946 | if (Previous.empty() && SkipBody && SkipBody->Previous) | ||||||
15947 | Previous.addDecl(SkipBody->Previous); | ||||||
15948 | |||||||
15949 | if (!Previous.empty()) { | ||||||
15950 | NamedDecl *PrevDecl = Previous.getFoundDecl(); | ||||||
15951 | NamedDecl *DirectPrevDecl = Previous.getRepresentativeDecl(); | ||||||
15952 | |||||||
15953 | // It's okay to have a tag decl in the same scope as a typedef | ||||||
15954 | // which hides a tag decl in the same scope. Finding this | ||||||
15955 | // insanity with a redeclaration lookup can only actually happen | ||||||
15956 | // in C++. | ||||||
15957 | // | ||||||
15958 | // This is also okay for elaborated-type-specifiers, which is | ||||||
15959 | // technically forbidden by the current standard but which is | ||||||
15960 | // okay according to the likely resolution of an open issue; | ||||||
15961 | // see http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_active.html#407 | ||||||
15962 | if (getLangOpts().CPlusPlus) { | ||||||
15963 | if (TypedefNameDecl *TD = dyn_cast<TypedefNameDecl>(PrevDecl)) { | ||||||
15964 | if (const TagType *TT = TD->getUnderlyingType()->getAs<TagType>()) { | ||||||
15965 | TagDecl *Tag = TT->getDecl(); | ||||||
15966 | if (Tag->getDeclName() == Name && | ||||||
15967 | Tag->getDeclContext()->getRedeclContext() | ||||||
15968 | ->Equals(TD->getDeclContext()->getRedeclContext())) { | ||||||
15969 | PrevDecl = Tag; | ||||||
15970 | Previous.clear(); | ||||||
15971 | Previous.addDecl(Tag); | ||||||
15972 | Previous.resolveKind(); | ||||||
15973 | } | ||||||
15974 | } | ||||||
15975 | } | ||||||
15976 | } | ||||||
15977 | |||||||
15978 | // If this is a redeclaration of a using shadow declaration, it must | ||||||
15979 | // declare a tag in the same context. In MSVC mode, we allow a | ||||||
15980 | // redefinition if either context is within the other. | ||||||
15981 | if (auto *Shadow = dyn_cast<UsingShadowDecl>(DirectPrevDecl)) { | ||||||
15982 | auto *OldTag = dyn_cast<TagDecl>(PrevDecl); | ||||||
15983 | if (SS.isEmpty() && TUK != TUK_Reference && TUK != TUK_Friend && | ||||||
15984 | isDeclInScope(Shadow, SearchDC, S, isMemberSpecialization) && | ||||||
15985 | !(OldTag && isAcceptableTagRedeclContext( | ||||||
15986 | *this, OldTag->getDeclContext(), SearchDC))) { | ||||||
15987 | Diag(KWLoc, diag::err_using_decl_conflict_reverse); | ||||||
15988 | Diag(Shadow->getTargetDecl()->getLocation(), | ||||||
15989 | diag::note_using_decl_target); | ||||||
15990 | Diag(Shadow->getIntroducer()->getLocation(), diag::note_using_decl) | ||||||
15991 | << 0; | ||||||
15992 | // Recover by ignoring the old declaration. | ||||||
15993 | Previous.clear(); | ||||||
15994 | goto CreateNewDecl; | ||||||
15995 | } | ||||||
15996 | } | ||||||
15997 | |||||||
15998 | if (TagDecl *PrevTagDecl = dyn_cast<TagDecl>(PrevDecl)) { | ||||||
15999 | // If this is a use of a previous tag, or if the tag is already declared | ||||||
16000 | // in the same scope (so that the definition/declaration completes or | ||||||
16001 | // rementions the tag), reuse the decl. | ||||||
16002 | if (TUK == TUK_Reference || TUK == TUK_Friend || | ||||||
16003 | isDeclInScope(DirectPrevDecl, SearchDC, S, | ||||||
16004 | SS.isNotEmpty() || isMemberSpecialization)) { | ||||||
16005 | // Make sure that this wasn't declared as an enum and now used as a | ||||||
16006 | // struct or something similar. | ||||||
16007 | if (!isAcceptableTagRedeclaration(PrevTagDecl, Kind, | ||||||
16008 | TUK == TUK_Definition, KWLoc, | ||||||
16009 | Name)) { | ||||||
16010 | bool SafeToContinue | ||||||
16011 | = (PrevTagDecl->getTagKind() != TTK_Enum && | ||||||
16012 | Kind != TTK_Enum); | ||||||
16013 | if (SafeToContinue) | ||||||
16014 | Diag(KWLoc, diag::err_use_with_wrong_tag) | ||||||
16015 | << Name | ||||||
16016 | << FixItHint::CreateReplacement(SourceRange(KWLoc), | ||||||
16017 | PrevTagDecl->getKindName()); | ||||||
16018 | else | ||||||
16019 | Diag(KWLoc, diag::err_use_with_wrong_tag) << Name; | ||||||
16020 | Diag(PrevTagDecl->getLocation(), diag::note_previous_use); | ||||||
16021 | |||||||
16022 | if (SafeToContinue) | ||||||
16023 | Kind = PrevTagDecl->getTagKind(); | ||||||
16024 | else { | ||||||
16025 | // Recover by making this an anonymous redefinition. | ||||||
16026 | Name = nullptr; | ||||||
16027 | Previous.clear(); | ||||||
16028 | Invalid = true; | ||||||
16029 | } | ||||||
16030 | } | ||||||
16031 | |||||||
16032 | if (Kind == TTK_Enum && PrevTagDecl->getTagKind() == TTK_Enum) { | ||||||
16033 | const EnumDecl *PrevEnum = cast<EnumDecl>(PrevTagDecl); | ||||||
16034 | if (TUK == TUK_Reference || TUK == TUK_Friend) | ||||||
16035 | return PrevTagDecl; | ||||||
16036 | |||||||
16037 | QualType EnumUnderlyingTy; | ||||||
16038 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) | ||||||
16039 | EnumUnderlyingTy = TI->getType().getUnqualifiedType(); | ||||||
16040 | else if (const Type *T = EnumUnderlying.dyn_cast<const Type*>()) | ||||||
16041 | EnumUnderlyingTy = QualType(T, 0); | ||||||
16042 | |||||||
16043 | // All conflicts with previous declarations are recovered by | ||||||
16044 | // returning the previous declaration, unless this is a definition, | ||||||
16045 | // in which case we want the caller to bail out. | ||||||
16046 | if (CheckEnumRedeclaration(NameLoc.isValid() ? NameLoc : KWLoc, | ||||||
16047 | ScopedEnum, EnumUnderlyingTy, | ||||||
16048 | IsFixed, PrevEnum)) | ||||||
16049 | return TUK == TUK_Declaration ? PrevTagDecl : nullptr; | ||||||
16050 | } | ||||||
16051 | |||||||
16052 | // C++11 [class.mem]p1: | ||||||
16053 | // A member shall not be declared twice in the member-specification, | ||||||
16054 | // except that a nested class or member class template can be declared | ||||||
16055 | // and then later defined. | ||||||
16056 | if (TUK == TUK_Declaration && PrevDecl->isCXXClassMember() && | ||||||
16057 | S->isDeclScope(PrevDecl)) { | ||||||
16058 | Diag(NameLoc, diag::ext_member_redeclared); | ||||||
16059 | Diag(PrevTagDecl->getLocation(), diag::note_previous_declaration); | ||||||
16060 | } | ||||||
16061 | |||||||
16062 | if (!Invalid) { | ||||||
16063 | // If this is a use, just return the declaration we found, unless | ||||||
16064 | // we have attributes. | ||||||
16065 | if (TUK == TUK_Reference || TUK == TUK_Friend) { | ||||||
16066 | if (!Attrs.empty()) { | ||||||
16067 | // FIXME: Diagnose these attributes. For now, we create a new | ||||||
16068 | // declaration to hold them. | ||||||
16069 | } else if (TUK == TUK_Reference && | ||||||
16070 | (PrevTagDecl->getFriendObjectKind() == | ||||||
16071 | Decl::FOK_Undeclared || | ||||||
16072 | PrevDecl->getOwningModule() != getCurrentModule()) && | ||||||
16073 | SS.isEmpty()) { | ||||||
16074 | // This declaration is a reference to an existing entity, but | ||||||
16075 | // has different visibility from that entity: it either makes | ||||||
16076 | // a friend visible or it makes a type visible in a new module. | ||||||
16077 | // In either case, create a new declaration. We only do this if | ||||||
16078 | // the declaration would have meant the same thing if no prior | ||||||
16079 | // declaration were found, that is, if it was found in the same | ||||||
16080 | // scope where we would have injected a declaration. | ||||||
16081 | if (!getTagInjectionContext(CurContext)->getRedeclContext() | ||||||
16082 | ->Equals(PrevDecl->getDeclContext()->getRedeclContext())) | ||||||
16083 | return PrevTagDecl; | ||||||
16084 | // This is in the injected scope, create a new declaration in | ||||||
16085 | // that scope. | ||||||
16086 | S = getTagInjectionScope(S, getLangOpts()); | ||||||
16087 | } else { | ||||||
16088 | return PrevTagDecl; | ||||||
16089 | } | ||||||
16090 | } | ||||||
16091 | |||||||
16092 | // Diagnose attempts to redefine a tag. | ||||||
16093 | if (TUK == TUK_Definition) { | ||||||
16094 | if (NamedDecl *Def = PrevTagDecl->getDefinition()) { | ||||||
16095 | // If we're defining a specialization and the previous definition | ||||||
16096 | // is from an implicit instantiation, don't emit an error | ||||||
16097 | // here; we'll catch this in the general case below. | ||||||
16098 | bool IsExplicitSpecializationAfterInstantiation = false; | ||||||
16099 | if (isMemberSpecialization) { | ||||||
16100 | if (CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(Def)) | ||||||
16101 | IsExplicitSpecializationAfterInstantiation = | ||||||
16102 | RD->getTemplateSpecializationKind() != | ||||||
16103 | TSK_ExplicitSpecialization; | ||||||
16104 | else if (EnumDecl *ED = dyn_cast<EnumDecl>(Def)) | ||||||
16105 | IsExplicitSpecializationAfterInstantiation = | ||||||
16106 | ED->getTemplateSpecializationKind() != | ||||||
16107 | TSK_ExplicitSpecialization; | ||||||
16108 | } | ||||||
16109 | |||||||
16110 | // Note that clang allows ODR-like semantics for ObjC/C, i.e., do | ||||||
16111 | // not keep more that one definition around (merge them). However, | ||||||
16112 | // ensure the decl passes the structural compatibility check in | ||||||
16113 | // C11 6.2.7/1 (or 6.1.2.6/1 in C89). | ||||||
16114 | NamedDecl *Hidden = nullptr; | ||||||
16115 | if (SkipBody && !hasVisibleDefinition(Def, &Hidden)) { | ||||||
16116 | // There is a definition of this tag, but it is not visible. We | ||||||
16117 | // explicitly make use of C++'s one definition rule here, and | ||||||
16118 | // assume that this definition is identical to the hidden one | ||||||
16119 | // we already have. Make the existing definition visible and | ||||||
16120 | // use it in place of this one. | ||||||
16121 | if (!getLangOpts().CPlusPlus) { | ||||||
16122 | // Postpone making the old definition visible until after we | ||||||
16123 | // complete parsing the new one and do the structural | ||||||
16124 | // comparison. | ||||||
16125 | SkipBody->CheckSameAsPrevious = true; | ||||||
16126 | SkipBody->New = createTagFromNewDecl(); | ||||||
16127 | SkipBody->Previous = Def; | ||||||
16128 | return Def; | ||||||
16129 | } else { | ||||||
16130 | SkipBody->ShouldSkip = true; | ||||||
16131 | SkipBody->Previous = Def; | ||||||
16132 | makeMergedDefinitionVisible(Hidden); | ||||||
16133 | // Carry on and handle it like a normal definition. We'll | ||||||
16134 | // skip starting the definitiion later. | ||||||
16135 | } | ||||||
16136 | } else if (!IsExplicitSpecializationAfterInstantiation) { | ||||||
16137 | // A redeclaration in function prototype scope in C isn't | ||||||
16138 | // visible elsewhere, so merely issue a warning. | ||||||
16139 | if (!getLangOpts().CPlusPlus && S->containedInPrototypeScope()) | ||||||
16140 | Diag(NameLoc, diag::warn_redefinition_in_param_list) << Name; | ||||||
16141 | else | ||||||
16142 | Diag(NameLoc, diag::err_redefinition) << Name; | ||||||
16143 | notePreviousDefinition(Def, | ||||||
16144 | NameLoc.isValid() ? NameLoc : KWLoc); | ||||||
16145 | // If this is a redefinition, recover by making this | ||||||
16146 | // struct be anonymous, which will make any later | ||||||
16147 | // references get the previous definition. | ||||||
16148 | Name = nullptr; | ||||||
16149 | Previous.clear(); | ||||||
16150 | Invalid = true; | ||||||
16151 | } | ||||||
16152 | } else { | ||||||
16153 | // If the type is currently being defined, complain | ||||||
16154 | // about a nested redefinition. | ||||||
16155 | auto *TD = Context.getTagDeclType(PrevTagDecl)->getAsTagDecl(); | ||||||
16156 | if (TD->isBeingDefined()) { | ||||||
16157 | Diag(NameLoc, diag::err_nested_redefinition) << Name; | ||||||
16158 | Diag(PrevTagDecl->getLocation(), | ||||||
16159 | diag::note_previous_definition); | ||||||
16160 | Name = nullptr; | ||||||
16161 | Previous.clear(); | ||||||
16162 | Invalid = true; | ||||||
16163 | } | ||||||
16164 | } | ||||||
16165 | |||||||
16166 | // Okay, this is definition of a previously declared or referenced | ||||||
16167 | // tag. We're going to create a new Decl for it. | ||||||
16168 | } | ||||||
16169 | |||||||
16170 | // Okay, we're going to make a redeclaration. If this is some kind | ||||||
16171 | // of reference, make sure we build the redeclaration in the same DC | ||||||
16172 | // as the original, and ignore the current access specifier. | ||||||
16173 | if (TUK == TUK_Friend || TUK == TUK_Reference) { | ||||||
16174 | SearchDC = PrevTagDecl->getDeclContext(); | ||||||
16175 | AS = AS_none; | ||||||
16176 | } | ||||||
16177 | } | ||||||
16178 | // If we get here we have (another) forward declaration or we | ||||||
16179 | // have a definition. Just create a new decl. | ||||||
16180 | |||||||
16181 | } else { | ||||||
16182 | // If we get here, this is a definition of a new tag type in a nested | ||||||
16183 | // scope, e.g. "struct foo; void bar() { struct foo; }", just create a | ||||||
16184 | // new decl/type. We set PrevDecl to NULL so that the entities | ||||||
16185 | // have distinct types. | ||||||
16186 | Previous.clear(); | ||||||
16187 | } | ||||||
16188 | // If we get here, we're going to create a new Decl. If PrevDecl | ||||||
16189 | // is non-NULL, it's a definition of the tag declared by | ||||||
16190 | // PrevDecl. If it's NULL, we have a new definition. | ||||||
16191 | |||||||
16192 | // Otherwise, PrevDecl is not a tag, but was found with tag | ||||||
16193 | // lookup. This is only actually possible in C++, where a few | ||||||
16194 | // things like templates still live in the tag namespace. | ||||||
16195 | } else { | ||||||
16196 | // Use a better diagnostic if an elaborated-type-specifier | ||||||
16197 | // found the wrong kind of type on the first | ||||||
16198 | // (non-redeclaration) lookup. | ||||||
16199 | if ((TUK == TUK_Reference || TUK == TUK_Friend) && | ||||||
16200 | !Previous.isForRedeclaration()) { | ||||||
16201 | NonTagKind NTK = getNonTagTypeDeclKind(PrevDecl, Kind); | ||||||
16202 | Diag(NameLoc, diag::err_tag_reference_non_tag) << PrevDecl << NTK | ||||||
16203 | << Kind; | ||||||
16204 | Diag(PrevDecl->getLocation(), diag::note_declared_at); | ||||||
16205 | Invalid = true; | ||||||
16206 | |||||||
16207 | // Otherwise, only diagnose if the declaration is in scope. | ||||||
16208 | } else if (!isDeclInScope(DirectPrevDecl, SearchDC, S, | ||||||
16209 | SS.isNotEmpty() || isMemberSpecialization)) { | ||||||
16210 | // do nothing | ||||||
16211 | |||||||
16212 | // Diagnose implicit declarations introduced by elaborated types. | ||||||
16213 | } else if (TUK == TUK_Reference || TUK == TUK_Friend) { | ||||||
16214 | NonTagKind NTK = getNonTagTypeDeclKind(PrevDecl, Kind); | ||||||
16215 | Diag(NameLoc, diag::err_tag_reference_conflict) << NTK; | ||||||
16216 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; | ||||||
16217 | Invalid = true; | ||||||
16218 | |||||||
16219 | // Otherwise it's a declaration. Call out a particularly common | ||||||
16220 | // case here. | ||||||
16221 | } else if (TypedefNameDecl *TND = dyn_cast<TypedefNameDecl>(PrevDecl)) { | ||||||
16222 | unsigned Kind = 0; | ||||||
16223 | if (isa<TypeAliasDecl>(PrevDecl)) Kind = 1; | ||||||
16224 | Diag(NameLoc, diag::err_tag_definition_of_typedef) | ||||||
16225 | << Name << Kind << TND->getUnderlyingType(); | ||||||
16226 | Diag(PrevDecl->getLocation(), diag::note_previous_decl) << PrevDecl; | ||||||
16227 | Invalid = true; | ||||||
16228 | |||||||
16229 | // Otherwise, diagnose. | ||||||
16230 | } else { | ||||||
16231 | // The tag name clashes with something else in the target scope, | ||||||
16232 | // issue an error and recover by making this tag be anonymous. | ||||||
16233 | Diag(NameLoc, diag::err_redefinition_different_kind) << Name; | ||||||
16234 | notePreviousDefinition(PrevDecl, NameLoc); | ||||||
16235 | Name = nullptr; | ||||||
16236 | Invalid = true; | ||||||
16237 | } | ||||||
16238 | |||||||
16239 | // The existing declaration isn't relevant to us; we're in a | ||||||
16240 | // new scope, so clear out the previous declaration. | ||||||
16241 | Previous.clear(); | ||||||
16242 | } | ||||||
16243 | } | ||||||
16244 | |||||||
16245 | CreateNewDecl: | ||||||
16246 | |||||||
16247 | TagDecl *PrevDecl = nullptr; | ||||||
16248 | if (Previous.isSingleResult()) | ||||||
16249 | PrevDecl = cast<TagDecl>(Previous.getFoundDecl()); | ||||||
16250 | |||||||
16251 | // If there is an identifier, use the location of the identifier as the | ||||||
16252 | // location of the decl, otherwise use the location of the struct/union | ||||||
16253 | // keyword. | ||||||
16254 | SourceLocation Loc = NameLoc.isValid() ? NameLoc : KWLoc; | ||||||
16255 | |||||||
16256 | // Otherwise, create a new declaration. If there is a previous | ||||||
16257 | // declaration of the same entity, the two will be linked via | ||||||
16258 | // PrevDecl. | ||||||
16259 | TagDecl *New; | ||||||
16260 | |||||||
16261 | if (Kind == TTK_Enum) { | ||||||
16262 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: | ||||||
16263 | // enum X { A, B, C } D; D should chain to X. | ||||||
16264 | New = EnumDecl::Create(Context, SearchDC, KWLoc, Loc, Name, | ||||||
16265 | cast_or_null<EnumDecl>(PrevDecl), ScopedEnum, | ||||||
16266 | ScopedEnumUsesClassTag, IsFixed); | ||||||
16267 | |||||||
16268 | if (isStdAlignValT && (!StdAlignValT || getStdAlignValT()->isImplicit())) | ||||||
16269 | StdAlignValT = cast<EnumDecl>(New); | ||||||
16270 | |||||||
16271 | // If this is an undefined enum, warn. | ||||||
16272 | if (TUK != TUK_Definition && !Invalid) { | ||||||
16273 | TagDecl *Def; | ||||||
16274 | if (IsFixed && cast<EnumDecl>(New)->isFixed()) { | ||||||
16275 | // C++0x: 7.2p2: opaque-enum-declaration. | ||||||
16276 | // Conflicts are diagnosed above. Do nothing. | ||||||
16277 | } | ||||||
16278 | else if (PrevDecl && (Def = cast<EnumDecl>(PrevDecl)->getDefinition())) { | ||||||
16279 | Diag(Loc, diag::ext_forward_ref_enum_def) | ||||||
16280 | << New; | ||||||
16281 | Diag(Def->getLocation(), diag::note_previous_definition); | ||||||
16282 | } else { | ||||||
16283 | unsigned DiagID = diag::ext_forward_ref_enum; | ||||||
16284 | if (getLangOpts().MSVCCompat) | ||||||
16285 | DiagID = diag::ext_ms_forward_ref_enum; | ||||||
16286 | else if (getLangOpts().CPlusPlus) | ||||||
16287 | DiagID = diag::err_forward_ref_enum; | ||||||
16288 | Diag(Loc, DiagID); | ||||||
16289 | } | ||||||
16290 | } | ||||||
16291 | |||||||
16292 | if (EnumUnderlying) { | ||||||
16293 | EnumDecl *ED = cast<EnumDecl>(New); | ||||||
16294 | if (TypeSourceInfo *TI = EnumUnderlying.dyn_cast<TypeSourceInfo*>()) | ||||||
16295 | ED->setIntegerTypeSourceInfo(TI); | ||||||
16296 | else | ||||||
16297 | ED->setIntegerType(QualType(EnumUnderlying.get<const Type*>(), 0)); | ||||||
16298 | ED->setPromotionType(ED->getIntegerType()); | ||||||
16299 | assert(ED->isComplete() && "enum with type should be complete")(static_cast <bool> (ED->isComplete() && "enum with type should be complete" ) ? void (0) : __assert_fail ("ED->isComplete() && \"enum with type should be complete\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16299, __extension__ __PRETTY_FUNCTION__)); | ||||||
16300 | } | ||||||
16301 | } else { | ||||||
16302 | // struct/union/class | ||||||
16303 | |||||||
16304 | // FIXME: Tag decls should be chained to any simultaneous vardecls, e.g.: | ||||||
16305 | // struct X { int A; } D; D should chain to X. | ||||||
16306 | if (getLangOpts().CPlusPlus) { | ||||||
16307 | // FIXME: Look for a way to use RecordDecl for simple structs. | ||||||
16308 | New = CXXRecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
16309 | cast_or_null<CXXRecordDecl>(PrevDecl)); | ||||||
16310 | |||||||
16311 | if (isStdBadAlloc && (!StdBadAlloc || getStdBadAlloc()->isImplicit())) | ||||||
16312 | StdBadAlloc = cast<CXXRecordDecl>(New); | ||||||
16313 | } else | ||||||
16314 | New = RecordDecl::Create(Context, Kind, SearchDC, KWLoc, Loc, Name, | ||||||
16315 | cast_or_null<RecordDecl>(PrevDecl)); | ||||||
16316 | } | ||||||
16317 | |||||||
16318 | // C++11 [dcl.type]p3: | ||||||
16319 | // A type-specifier-seq shall not define a class or enumeration [...]. | ||||||
16320 | if (getLangOpts().CPlusPlus && (IsTypeSpecifier || IsTemplateParamOrArg) && | ||||||
16321 | TUK == TUK_Definition) { | ||||||
16322 | Diag(New->getLocation(), diag::err_type_defined_in_type_specifier) | ||||||
16323 | << Context.getTagDeclType(New); | ||||||
16324 | Invalid = true; | ||||||
16325 | } | ||||||
16326 | |||||||
16327 | if (!Invalid && getLangOpts().CPlusPlus && TUK == TUK_Definition && | ||||||
16328 | DC->getDeclKind() == Decl::Enum) { | ||||||
16329 | Diag(New->getLocation(), diag::err_type_defined_in_enum) | ||||||
16330 | << Context.getTagDeclType(New); | ||||||
16331 | Invalid = true; | ||||||
16332 | } | ||||||
16333 | |||||||
16334 | // Maybe add qualifier info. | ||||||
16335 | if (SS.isNotEmpty()) { | ||||||
16336 | if (SS.isSet()) { | ||||||
16337 | // If this is either a declaration or a definition, check the | ||||||
16338 | // nested-name-specifier against the current context. | ||||||
16339 | if ((TUK == TUK_Definition || TUK == TUK_Declaration) && | ||||||
16340 | diagnoseQualifiedDeclaration(SS, DC, OrigName, Loc, | ||||||
16341 | isMemberSpecialization)) | ||||||
16342 | Invalid = true; | ||||||
16343 | |||||||
16344 | New->setQualifierInfo(SS.getWithLocInContext(Context)); | ||||||
16345 | if (TemplateParameterLists.size() > 0) { | ||||||
16346 | New->setTemplateParameterListsInfo(Context, TemplateParameterLists); | ||||||
16347 | } | ||||||
16348 | } | ||||||
16349 | else | ||||||
16350 | Invalid = true; | ||||||
16351 | } | ||||||
16352 | |||||||
16353 | if (RecordDecl *RD = dyn_cast<RecordDecl>(New)) { | ||||||
16354 | // Add alignment attributes if necessary; these attributes are checked when | ||||||
16355 | // the ASTContext lays out the structure. | ||||||
16356 | // | ||||||
16357 | // It is important for implementing the correct semantics that this | ||||||
16358 | // happen here (in ActOnTag). The #pragma pack stack is | ||||||
16359 | // maintained as a result of parser callbacks which can occur at | ||||||
16360 | // many points during the parsing of a struct declaration (because | ||||||
16361 | // the #pragma tokens are effectively skipped over during the | ||||||
16362 | // parsing of the struct). | ||||||
16363 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) { | ||||||
16364 | AddAlignmentAttributesForRecord(RD); | ||||||
16365 | AddMsStructLayoutForRecord(RD); | ||||||
16366 | } | ||||||
16367 | } | ||||||
16368 | |||||||
16369 | if (ModulePrivateLoc.isValid()) { | ||||||
16370 | if (isMemberSpecialization) | ||||||
16371 | Diag(New->getLocation(), diag::err_module_private_specialization) | ||||||
16372 | << 2 | ||||||
16373 | << FixItHint::CreateRemoval(ModulePrivateLoc); | ||||||
16374 | // __module_private__ does not apply to local classes. However, we only | ||||||
16375 | // diagnose this as an error when the declaration specifiers are | ||||||
16376 | // freestanding. Here, we just ignore the __module_private__. | ||||||
16377 | else if (!SearchDC->isFunctionOrMethod()) | ||||||
16378 | New->setModulePrivate(); | ||||||
16379 | } | ||||||
16380 | |||||||
16381 | // If this is a specialization of a member class (of a class template), | ||||||
16382 | // check the specialization. | ||||||
16383 | if (isMemberSpecialization && CheckMemberSpecialization(New, Previous)) | ||||||
16384 | Invalid = true; | ||||||
16385 | |||||||
16386 | // If we're declaring or defining a tag in function prototype scope in C, | ||||||
16387 | // note that this type can only be used within the function and add it to | ||||||
16388 | // the list of decls to inject into the function definition scope. | ||||||
16389 | if ((Name || Kind == TTK_Enum) && | ||||||
16390 | getNonFieldDeclScope(S)->isFunctionPrototypeScope()) { | ||||||
16391 | if (getLangOpts().CPlusPlus) { | ||||||
16392 | // C++ [dcl.fct]p6: | ||||||
16393 | // Types shall not be defined in return or parameter types. | ||||||
16394 | if (TUK == TUK_Definition && !IsTypeSpecifier) { | ||||||
16395 | Diag(Loc, diag::err_type_defined_in_param_type) | ||||||
16396 | << Name; | ||||||
16397 | Invalid = true; | ||||||
16398 | } | ||||||
16399 | } else if (!PrevDecl) { | ||||||
16400 | Diag(Loc, diag::warn_decl_in_param_list) << Context.getTagDeclType(New); | ||||||
16401 | } | ||||||
16402 | } | ||||||
16403 | |||||||
16404 | if (Invalid) | ||||||
16405 | New->setInvalidDecl(); | ||||||
16406 | |||||||
16407 | // Set the lexical context. If the tag has a C++ scope specifier, the | ||||||
16408 | // lexical context will be different from the semantic context. | ||||||
16409 | New->setLexicalDeclContext(CurContext); | ||||||
16410 | |||||||
16411 | // Mark this as a friend decl if applicable. | ||||||
16412 | // In Microsoft mode, a friend declaration also acts as a forward | ||||||
16413 | // declaration so we always pass true to setObjectOfFriendDecl to make | ||||||
16414 | // the tag name visible. | ||||||
16415 | if (TUK == TUK_Friend) | ||||||
16416 | New->setObjectOfFriendDecl(getLangOpts().MSVCCompat); | ||||||
16417 | |||||||
16418 | // Set the access specifier. | ||||||
16419 | if (!Invalid && SearchDC->isRecord()) | ||||||
16420 | SetMemberAccessSpecifier(New, PrevDecl, AS); | ||||||
16421 | |||||||
16422 | if (PrevDecl) | ||||||
16423 | CheckRedeclarationModuleOwnership(New, PrevDecl); | ||||||
16424 | |||||||
16425 | if (TUK == TUK_Definition && (!SkipBody || !SkipBody->ShouldSkip)) | ||||||
16426 | New->startDefinition(); | ||||||
16427 | |||||||
16428 | ProcessDeclAttributeList(S, New, Attrs); | ||||||
16429 | AddPragmaAttributes(S, New); | ||||||
16430 | |||||||
16431 | // If this has an identifier, add it to the scope stack. | ||||||
16432 | if (TUK == TUK_Friend) { | ||||||
16433 | // We might be replacing an existing declaration in the lookup tables; | ||||||
16434 | // if so, borrow its access specifier. | ||||||
16435 | if (PrevDecl) | ||||||
16436 | New->setAccess(PrevDecl->getAccess()); | ||||||
16437 | |||||||
16438 | DeclContext *DC = New->getDeclContext()->getRedeclContext(); | ||||||
16439 | DC->makeDeclVisibleInContext(New); | ||||||
16440 | if (Name) // can be null along some error paths | ||||||
16441 | if (Scope *EnclosingScope = getScopeForDeclContext(S, DC)) | ||||||
16442 | PushOnScopeChains(New, EnclosingScope, /* AddToContext = */ false); | ||||||
16443 | } else if (Name) { | ||||||
16444 | S = getNonFieldDeclScope(S); | ||||||
16445 | PushOnScopeChains(New, S, true); | ||||||
16446 | } else { | ||||||
16447 | CurContext->addDecl(New); | ||||||
16448 | } | ||||||
16449 | |||||||
16450 | // If this is the C FILE type, notify the AST context. | ||||||
16451 | if (IdentifierInfo *II = New->getIdentifier()) | ||||||
16452 | if (!New->isInvalidDecl() && | ||||||
16453 | New->getDeclContext()->getRedeclContext()->isTranslationUnit() && | ||||||
16454 | II->isStr("FILE")) | ||||||
16455 | Context.setFILEDecl(New); | ||||||
16456 | |||||||
16457 | if (PrevDecl) | ||||||
16458 | mergeDeclAttributes(New, PrevDecl); | ||||||
16459 | |||||||
16460 | if (auto *CXXRD = dyn_cast<CXXRecordDecl>(New)) | ||||||
16461 | inferGslOwnerPointerAttribute(CXXRD); | ||||||
16462 | |||||||
16463 | // If there's a #pragma GCC visibility in scope, set the visibility of this | ||||||
16464 | // record. | ||||||
16465 | AddPushedVisibilityAttribute(New); | ||||||
16466 | |||||||
16467 | if (isMemberSpecialization && !New->isInvalidDecl()) | ||||||
16468 | CompleteMemberSpecialization(New, Previous); | ||||||
16469 | |||||||
16470 | OwnedDecl = true; | ||||||
16471 | // In C++, don't return an invalid declaration. We can't recover well from | ||||||
16472 | // the cases where we make the type anonymous. | ||||||
16473 | if (Invalid && getLangOpts().CPlusPlus) { | ||||||
16474 | if (New->isBeingDefined()) | ||||||
16475 | if (auto RD = dyn_cast<RecordDecl>(New)) | ||||||
16476 | RD->completeDefinition(); | ||||||
16477 | return nullptr; | ||||||
16478 | } else if (SkipBody && SkipBody->ShouldSkip) { | ||||||
16479 | return SkipBody->Previous; | ||||||
16480 | } else { | ||||||
16481 | return New; | ||||||
16482 | } | ||||||
16483 | } | ||||||
16484 | |||||||
16485 | void Sema::ActOnTagStartDefinition(Scope *S, Decl *TagD) { | ||||||
16486 | AdjustDeclIfTemplate(TagD); | ||||||
16487 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
16488 | |||||||
16489 | // Enter the tag context. | ||||||
16490 | PushDeclContext(S, Tag); | ||||||
16491 | |||||||
16492 | ActOnDocumentableDecl(TagD); | ||||||
16493 | |||||||
16494 | // If there's a #pragma GCC visibility in scope, set the visibility of this | ||||||
16495 | // record. | ||||||
16496 | AddPushedVisibilityAttribute(Tag); | ||||||
16497 | } | ||||||
16498 | |||||||
16499 | bool Sema::ActOnDuplicateDefinition(DeclSpec &DS, Decl *Prev, | ||||||
16500 | SkipBodyInfo &SkipBody) { | ||||||
16501 | if (!hasStructuralCompatLayout(Prev, SkipBody.New)) | ||||||
16502 | return false; | ||||||
16503 | |||||||
16504 | // Make the previous decl visible. | ||||||
16505 | makeMergedDefinitionVisible(SkipBody.Previous); | ||||||
16506 | return true; | ||||||
16507 | } | ||||||
16508 | |||||||
16509 | Decl *Sema::ActOnObjCContainerStartDefinition(Decl *IDecl) { | ||||||
16510 | assert(isa<ObjCContainerDecl>(IDecl) &&(static_cast <bool> (isa<ObjCContainerDecl>(IDecl ) && "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl" ) ? void (0) : __assert_fail ("isa<ObjCContainerDecl>(IDecl) && \"ActOnObjCContainerStartDefinition - Not ObjCContainerDecl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16511, __extension__ __PRETTY_FUNCTION__)) | ||||||
16511 | "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl")(static_cast <bool> (isa<ObjCContainerDecl>(IDecl ) && "ActOnObjCContainerStartDefinition - Not ObjCContainerDecl" ) ? void (0) : __assert_fail ("isa<ObjCContainerDecl>(IDecl) && \"ActOnObjCContainerStartDefinition - Not ObjCContainerDecl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16511, __extension__ __PRETTY_FUNCTION__)); | ||||||
16512 | DeclContext *OCD = cast<DeclContext>(IDecl); | ||||||
16513 | assert(OCD->getLexicalParent() == CurContext &&(static_cast <bool> (OCD->getLexicalParent() == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("OCD->getLexicalParent() == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16514, __extension__ __PRETTY_FUNCTION__)) | ||||||
16514 | "The next DeclContext should be lexically contained in the current one.")(static_cast <bool> (OCD->getLexicalParent() == CurContext && "The next DeclContext should be lexically contained in the current one." ) ? void (0) : __assert_fail ("OCD->getLexicalParent() == CurContext && \"The next DeclContext should be lexically contained in the current one.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16514, __extension__ __PRETTY_FUNCTION__)); | ||||||
16515 | CurContext = OCD; | ||||||
16516 | return IDecl; | ||||||
16517 | } | ||||||
16518 | |||||||
16519 | void Sema::ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagD, | ||||||
16520 | SourceLocation FinalLoc, | ||||||
16521 | bool IsFinalSpelledSealed, | ||||||
16522 | bool IsAbstract, | ||||||
16523 | SourceLocation LBraceLoc) { | ||||||
16524 | AdjustDeclIfTemplate(TagD); | ||||||
16525 | CXXRecordDecl *Record = cast<CXXRecordDecl>(TagD); | ||||||
16526 | |||||||
16527 | FieldCollector->StartClass(); | ||||||
16528 | |||||||
16529 | if (!Record->getIdentifier()) | ||||||
16530 | return; | ||||||
16531 | |||||||
16532 | if (IsAbstract) | ||||||
16533 | Record->markAbstract(); | ||||||
16534 | |||||||
16535 | if (FinalLoc.isValid()) { | ||||||
16536 | Record->addAttr(FinalAttr::Create( | ||||||
16537 | Context, FinalLoc, AttributeCommonInfo::AS_Keyword, | ||||||
16538 | static_cast<FinalAttr::Spelling>(IsFinalSpelledSealed))); | ||||||
16539 | } | ||||||
16540 | // C++ [class]p2: | ||||||
16541 | // [...] The class-name is also inserted into the scope of the | ||||||
16542 | // class itself; this is known as the injected-class-name. For | ||||||
16543 | // purposes of access checking, the injected-class-name is treated | ||||||
16544 | // as if it were a public member name. | ||||||
16545 | CXXRecordDecl *InjectedClassName = CXXRecordDecl::Create( | ||||||
16546 | Context, Record->getTagKind(), CurContext, Record->getBeginLoc(), | ||||||
16547 | Record->getLocation(), Record->getIdentifier(), | ||||||
16548 | /*PrevDecl=*/nullptr, | ||||||
16549 | /*DelayTypeCreation=*/true); | ||||||
16550 | Context.getTypeDeclType(InjectedClassName, Record); | ||||||
16551 | InjectedClassName->setImplicit(); | ||||||
16552 | InjectedClassName->setAccess(AS_public); | ||||||
16553 | if (ClassTemplateDecl *Template = Record->getDescribedClassTemplate()) | ||||||
16554 | InjectedClassName->setDescribedClassTemplate(Template); | ||||||
16555 | PushOnScopeChains(InjectedClassName, S); | ||||||
16556 | assert(InjectedClassName->isInjectedClassName() &&(static_cast <bool> (InjectedClassName->isInjectedClassName () && "Broken injected-class-name") ? void (0) : __assert_fail ("InjectedClassName->isInjectedClassName() && \"Broken injected-class-name\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16557, __extension__ __PRETTY_FUNCTION__)) | ||||||
16557 | "Broken injected-class-name")(static_cast <bool> (InjectedClassName->isInjectedClassName () && "Broken injected-class-name") ? void (0) : __assert_fail ("InjectedClassName->isInjectedClassName() && \"Broken injected-class-name\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16557, __extension__ __PRETTY_FUNCTION__)); | ||||||
16558 | } | ||||||
16559 | |||||||
16560 | void Sema::ActOnTagFinishDefinition(Scope *S, Decl *TagD, | ||||||
16561 | SourceRange BraceRange) { | ||||||
16562 | AdjustDeclIfTemplate(TagD); | ||||||
16563 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
16564 | Tag->setBraceRange(BraceRange); | ||||||
16565 | |||||||
16566 | // Make sure we "complete" the definition even it is invalid. | ||||||
16567 | if (Tag->isBeingDefined()) { | ||||||
16568 | assert(Tag->isInvalidDecl() && "We should already have completed it")(static_cast <bool> (Tag->isInvalidDecl() && "We should already have completed it") ? void (0) : __assert_fail ("Tag->isInvalidDecl() && \"We should already have completed it\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16568, __extension__ __PRETTY_FUNCTION__)); | ||||||
16569 | if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) | ||||||
16570 | RD->completeDefinition(); | ||||||
16571 | } | ||||||
16572 | |||||||
16573 | if (isa<CXXRecordDecl>(Tag)) { | ||||||
16574 | FieldCollector->FinishClass(); | ||||||
16575 | } | ||||||
16576 | |||||||
16577 | // Exit this scope of this tag's definition. | ||||||
16578 | PopDeclContext(); | ||||||
16579 | |||||||
16580 | if (getCurLexicalContext()->isObjCContainer() && | ||||||
16581 | Tag->getDeclContext()->isFileContext()) | ||||||
16582 | Tag->setTopLevelDeclInObjCContainer(); | ||||||
16583 | |||||||
16584 | // Notify the consumer that we've defined a tag. | ||||||
16585 | if (!Tag->isInvalidDecl()) | ||||||
16586 | Consumer.HandleTagDeclDefinition(Tag); | ||||||
16587 | } | ||||||
16588 | |||||||
16589 | void Sema::ActOnObjCContainerFinishDefinition() { | ||||||
16590 | // Exit this scope of this interface definition. | ||||||
16591 | PopDeclContext(); | ||||||
16592 | } | ||||||
16593 | |||||||
16594 | void Sema::ActOnObjCTemporaryExitContainerContext(DeclContext *DC) { | ||||||
16595 | assert(DC == CurContext && "Mismatch of container contexts")(static_cast <bool> (DC == CurContext && "Mismatch of container contexts" ) ? void (0) : __assert_fail ("DC == CurContext && \"Mismatch of container contexts\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16595, __extension__ __PRETTY_FUNCTION__)); | ||||||
16596 | OriginalLexicalContext = DC; | ||||||
16597 | ActOnObjCContainerFinishDefinition(); | ||||||
16598 | } | ||||||
16599 | |||||||
16600 | void Sema::ActOnObjCReenterContainerContext(DeclContext *DC) { | ||||||
16601 | ActOnObjCContainerStartDefinition(cast<Decl>(DC)); | ||||||
16602 | OriginalLexicalContext = nullptr; | ||||||
16603 | } | ||||||
16604 | |||||||
16605 | void Sema::ActOnTagDefinitionError(Scope *S, Decl *TagD) { | ||||||
16606 | AdjustDeclIfTemplate(TagD); | ||||||
16607 | TagDecl *Tag = cast<TagDecl>(TagD); | ||||||
16608 | Tag->setInvalidDecl(); | ||||||
16609 | |||||||
16610 | // Make sure we "complete" the definition even it is invalid. | ||||||
16611 | if (Tag->isBeingDefined()) { | ||||||
16612 | if (RecordDecl *RD = dyn_cast<RecordDecl>(Tag)) | ||||||
16613 | RD->completeDefinition(); | ||||||
16614 | } | ||||||
16615 | |||||||
16616 | // We're undoing ActOnTagStartDefinition here, not | ||||||
16617 | // ActOnStartCXXMemberDeclarations, so we don't have to mess with | ||||||
16618 | // the FieldCollector. | ||||||
16619 | |||||||
16620 | PopDeclContext(); | ||||||
16621 | } | ||||||
16622 | |||||||
16623 | // Note that FieldName may be null for anonymous bitfields. | ||||||
16624 | ExprResult Sema::VerifyBitField(SourceLocation FieldLoc, | ||||||
16625 | IdentifierInfo *FieldName, | ||||||
16626 | QualType FieldTy, bool IsMsStruct, | ||||||
16627 | Expr *BitWidth, bool *ZeroWidth) { | ||||||
16628 | assert(BitWidth)(static_cast <bool> (BitWidth) ? void (0) : __assert_fail ("BitWidth", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 16628, __extension__ __PRETTY_FUNCTION__)); | ||||||
16629 | if (BitWidth->containsErrors()) | ||||||
16630 | return ExprError(); | ||||||
16631 | |||||||
16632 | // Default to true; that shouldn't confuse checks for emptiness | ||||||
16633 | if (ZeroWidth) | ||||||
16634 | *ZeroWidth = true; | ||||||
16635 | |||||||
16636 | // C99 6.7.2.1p4 - verify the field type. | ||||||
16637 | // C++ 9.6p3: A bit-field shall have integral or enumeration type. | ||||||
16638 | if (!FieldTy->isDependentType() && !FieldTy->isIntegralOrEnumerationType()) { | ||||||
16639 | // Handle incomplete and sizeless types with a specific error. | ||||||
16640 | if (RequireCompleteSizedType(FieldLoc, FieldTy, | ||||||
16641 | diag::err_field_incomplete_or_sizeless)) | ||||||
16642 | return ExprError(); | ||||||
16643 | if (FieldName) | ||||||
16644 | return Diag(FieldLoc, diag::err_not_integral_type_bitfield) | ||||||
16645 | << FieldName << FieldTy << BitWidth->getSourceRange(); | ||||||
16646 | return Diag(FieldLoc, diag::err_not_integral_type_anon_bitfield) | ||||||
16647 | << FieldTy << BitWidth->getSourceRange(); | ||||||
16648 | } else if (DiagnoseUnexpandedParameterPack(const_cast<Expr *>(BitWidth), | ||||||
16649 | UPPC_BitFieldWidth)) | ||||||
16650 | return ExprError(); | ||||||
16651 | |||||||
16652 | // If the bit-width is type- or value-dependent, don't try to check | ||||||
16653 | // it now. | ||||||
16654 | if (BitWidth->isValueDependent() || BitWidth->isTypeDependent()) | ||||||
16655 | return BitWidth; | ||||||
16656 | |||||||
16657 | llvm::APSInt Value; | ||||||
16658 | ExprResult ICE = VerifyIntegerConstantExpression(BitWidth, &Value, AllowFold); | ||||||
16659 | if (ICE.isInvalid()) | ||||||
16660 | return ICE; | ||||||
16661 | BitWidth = ICE.get(); | ||||||
16662 | |||||||
16663 | if (Value != 0 && ZeroWidth) | ||||||
16664 | *ZeroWidth = false; | ||||||
16665 | |||||||
16666 | // Zero-width bitfield is ok for anonymous field. | ||||||
16667 | if (Value == 0 && FieldName) | ||||||
16668 | return Diag(FieldLoc, diag::err_bitfield_has_zero_width) << FieldName; | ||||||
16669 | |||||||
16670 | if (Value.isSigned() && Value.isNegative()) { | ||||||
16671 | if (FieldName) | ||||||
16672 | return Diag(FieldLoc, diag::err_bitfield_has_negative_width) | ||||||
16673 | << FieldName << toString(Value, 10); | ||||||
16674 | return Diag(FieldLoc, diag::err_anon_bitfield_has_negative_width) | ||||||
16675 | << toString(Value, 10); | ||||||
16676 | } | ||||||
16677 | |||||||
16678 | // The size of the bit-field must not exceed our maximum permitted object | ||||||
16679 | // size. | ||||||
16680 | if (Value.getActiveBits() > ConstantArrayType::getMaxSizeBits(Context)) { | ||||||
16681 | return Diag(FieldLoc, diag::err_bitfield_too_wide) | ||||||
16682 | << !FieldName << FieldName << toString(Value, 10); | ||||||
16683 | } | ||||||
16684 | |||||||
16685 | if (!FieldTy->isDependentType()) { | ||||||
16686 | uint64_t TypeStorageSize = Context.getTypeSize(FieldTy); | ||||||
16687 | uint64_t TypeWidth = Context.getIntWidth(FieldTy); | ||||||
16688 | bool BitfieldIsOverwide = Value.ugt(TypeWidth); | ||||||
16689 | |||||||
16690 | // Over-wide bitfields are an error in C or when using the MSVC bitfield | ||||||
16691 | // ABI. | ||||||
16692 | bool CStdConstraintViolation = | ||||||
16693 | BitfieldIsOverwide && !getLangOpts().CPlusPlus; | ||||||
16694 | bool MSBitfieldViolation = | ||||||
16695 | Value.ugt(TypeStorageSize) && | ||||||
16696 | (IsMsStruct || Context.getTargetInfo().getCXXABI().isMicrosoft()); | ||||||
16697 | if (CStdConstraintViolation || MSBitfieldViolation) { | ||||||
16698 | unsigned DiagWidth = | ||||||
16699 | CStdConstraintViolation ? TypeWidth : TypeStorageSize; | ||||||
16700 | return Diag(FieldLoc, diag::err_bitfield_width_exceeds_type_width) | ||||||
16701 | << (bool)FieldName << FieldName << toString(Value, 10) | ||||||
16702 | << !CStdConstraintViolation << DiagWidth; | ||||||
16703 | } | ||||||
16704 | |||||||
16705 | // Warn on types where the user might conceivably expect to get all | ||||||
16706 | // specified bits as value bits: that's all integral types other than | ||||||
16707 | // 'bool'. | ||||||
16708 | if (BitfieldIsOverwide && !FieldTy->isBooleanType() && FieldName) { | ||||||
16709 | Diag(FieldLoc, diag::warn_bitfield_width_exceeds_type_width) | ||||||
16710 | << FieldName << toString(Value, 10) | ||||||
16711 | << (unsigned)TypeWidth; | ||||||
16712 | } | ||||||
16713 | } | ||||||
16714 | |||||||
16715 | return BitWidth; | ||||||
16716 | } | ||||||
16717 | |||||||
16718 | /// ActOnField - Each field of a C struct/union is passed into this in order | ||||||
16719 | /// to create a FieldDecl object for it. | ||||||
16720 | Decl *Sema::ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, | ||||||
16721 | Declarator &D, Expr *BitfieldWidth) { | ||||||
16722 | FieldDecl *Res = HandleField(S, cast_or_null<RecordDecl>(TagD), | ||||||
| |||||||
16723 | DeclStart, D, static_cast<Expr*>(BitfieldWidth), | ||||||
16724 | /*InitStyle=*/ICIS_NoInit, AS_public); | ||||||
16725 | return Res; | ||||||
16726 | } | ||||||
16727 | |||||||
16728 | /// HandleField - Analyze a field of a C struct or a C++ data member. | ||||||
16729 | /// | ||||||
16730 | FieldDecl *Sema::HandleField(Scope *S, RecordDecl *Record, | ||||||
16731 | SourceLocation DeclStart, | ||||||
16732 | Declarator &D, Expr *BitWidth, | ||||||
16733 | InClassInitStyle InitStyle, | ||||||
16734 | AccessSpecifier AS) { | ||||||
16735 | if (D.isDecompositionDeclarator()) { | ||||||
16736 | const DecompositionDeclarator &Decomp = D.getDecompositionDeclarator(); | ||||||
16737 | Diag(Decomp.getLSquareLoc(), diag::err_decomp_decl_context) | ||||||
16738 | << Decomp.getSourceRange(); | ||||||
16739 | return nullptr; | ||||||
16740 | } | ||||||
16741 | |||||||
16742 | IdentifierInfo *II = D.getIdentifier(); | ||||||
16743 | SourceLocation Loc = DeclStart; | ||||||
16744 | if (II
| ||||||
16745 | |||||||
16746 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
16747 | QualType T = TInfo->getType(); | ||||||
16748 | if (getLangOpts().CPlusPlus) { | ||||||
16749 | CheckExtraCXXDefaultArguments(D); | ||||||
16750 | |||||||
16751 | if (DiagnoseUnexpandedParameterPack(D.getIdentifierLoc(), TInfo, | ||||||
16752 | UPPC_DataMemberType)) { | ||||||
16753 | D.setInvalidType(); | ||||||
16754 | T = Context.IntTy; | ||||||
16755 | TInfo = Context.getTrivialTypeSourceInfo(T, Loc); | ||||||
16756 | } | ||||||
16757 | } | ||||||
16758 | |||||||
16759 | DiagnoseFunctionSpecifiers(D.getDeclSpec()); | ||||||
16760 | |||||||
16761 | if (D.getDeclSpec().isInlineSpecified()) | ||||||
16762 | Diag(D.getDeclSpec().getInlineSpecLoc(), diag::err_inline_non_function) | ||||||
16763 | << getLangOpts().CPlusPlus17; | ||||||
16764 | if (DeclSpec::TSCS TSCS = D.getDeclSpec().getThreadStorageClassSpec()) | ||||||
16765 | Diag(D.getDeclSpec().getThreadStorageClassSpecLoc(), | ||||||
16766 | diag::err_invalid_thread) | ||||||
16767 | << DeclSpec::getSpecifierName(TSCS); | ||||||
16768 | |||||||
16769 | // Check to see if this name was declared as a member previously | ||||||
16770 | NamedDecl *PrevDecl = nullptr; | ||||||
16771 | LookupResult Previous(*this, II, Loc, LookupMemberName, | ||||||
16772 | ForVisibleRedeclaration); | ||||||
16773 | LookupName(Previous, S); | ||||||
16774 | switch (Previous.getResultKind()) { | ||||||
16775 | case LookupResult::Found: | ||||||
16776 | case LookupResult::FoundUnresolvedValue: | ||||||
16777 | PrevDecl = Previous.getAsSingle<NamedDecl>(); | ||||||
16778 | break; | ||||||
16779 | |||||||
16780 | case LookupResult::FoundOverloaded: | ||||||
16781 | PrevDecl = Previous.getRepresentativeDecl(); | ||||||
16782 | break; | ||||||
16783 | |||||||
16784 | case LookupResult::NotFound: | ||||||
16785 | case LookupResult::NotFoundInCurrentInstantiation: | ||||||
16786 | case LookupResult::Ambiguous: | ||||||
16787 | break; | ||||||
16788 | } | ||||||
16789 | Previous.suppressDiagnostics(); | ||||||
16790 | |||||||
16791 | if (PrevDecl
| ||||||
16792 | // Maybe we will complain about the shadowed template parameter. | ||||||
16793 | DiagnoseTemplateParameterShadow(D.getIdentifierLoc(), PrevDecl); | ||||||
16794 | // Just pretend that we didn't see the previous declaration. | ||||||
16795 | PrevDecl = nullptr; | ||||||
16796 | } | ||||||
16797 | |||||||
16798 | if (PrevDecl
| ||||||
16799 | PrevDecl = nullptr; | ||||||
16800 | |||||||
16801 | bool Mutable | ||||||
16802 | = (D.getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_mutable); | ||||||
16803 | SourceLocation TSSL = D.getBeginLoc(); | ||||||
16804 | FieldDecl *NewFD | ||||||
16805 | = CheckFieldDecl(II, T, TInfo, Record, Loc, Mutable, BitWidth, InitStyle, | ||||||
16806 | TSSL, AS, PrevDecl, &D); | ||||||
16807 | |||||||
16808 | if (NewFD->isInvalidDecl()) | ||||||
16809 | Record->setInvalidDecl(); | ||||||
| |||||||
16810 | |||||||
16811 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
16812 | NewFD->setModulePrivate(); | ||||||
16813 | |||||||
16814 | if (NewFD->isInvalidDecl() && PrevDecl) { | ||||||
16815 | // Don't introduce NewFD into scope; there's already something | ||||||
16816 | // with the same name in the same scope. | ||||||
16817 | } else if (II) { | ||||||
16818 | PushOnScopeChains(NewFD, S); | ||||||
16819 | } else | ||||||
16820 | Record->addDecl(NewFD); | ||||||
16821 | |||||||
16822 | return NewFD; | ||||||
16823 | } | ||||||
16824 | |||||||
16825 | /// Build a new FieldDecl and check its well-formedness. | ||||||
16826 | /// | ||||||
16827 | /// This routine builds a new FieldDecl given the fields name, type, | ||||||
16828 | /// record, etc. \p PrevDecl should refer to any previous declaration | ||||||
16829 | /// with the same name and in the same scope as the field to be | ||||||
16830 | /// created. | ||||||
16831 | /// | ||||||
16832 | /// \returns a new FieldDecl. | ||||||
16833 | /// | ||||||
16834 | /// \todo The Declarator argument is a hack. It will be removed once | ||||||
16835 | FieldDecl *Sema::CheckFieldDecl(DeclarationName Name, QualType T, | ||||||
16836 | TypeSourceInfo *TInfo, | ||||||
16837 | RecordDecl *Record, SourceLocation Loc, | ||||||
16838 | bool Mutable, Expr *BitWidth, | ||||||
16839 | InClassInitStyle InitStyle, | ||||||
16840 | SourceLocation TSSL, | ||||||
16841 | AccessSpecifier AS, NamedDecl *PrevDecl, | ||||||
16842 | Declarator *D) { | ||||||
16843 | IdentifierInfo *II = Name.getAsIdentifierInfo(); | ||||||
16844 | bool InvalidDecl = false; | ||||||
16845 | if (D) InvalidDecl = D->isInvalidType(); | ||||||
16846 | |||||||
16847 | // If we receive a broken type, recover by assuming 'int' and | ||||||
16848 | // marking this declaration as invalid. | ||||||
16849 | if (T.isNull() || T->containsErrors()) { | ||||||
16850 | InvalidDecl = true; | ||||||
16851 | T = Context.IntTy; | ||||||
16852 | } | ||||||
16853 | |||||||
16854 | QualType EltTy = Context.getBaseElementType(T); | ||||||
16855 | if (!EltTy->isDependentType() && !EltTy->containsErrors()) { | ||||||
16856 | if (RequireCompleteSizedType(Loc, EltTy, | ||||||
16857 | diag::err_field_incomplete_or_sizeless)) { | ||||||
16858 | // Fields of incomplete type force their record to be invalid. | ||||||
16859 | Record->setInvalidDecl(); | ||||||
16860 | InvalidDecl = true; | ||||||
16861 | } else { | ||||||
16862 | NamedDecl *Def; | ||||||
16863 | EltTy->isIncompleteType(&Def); | ||||||
16864 | if (Def && Def->isInvalidDecl()) { | ||||||
16865 | Record->setInvalidDecl(); | ||||||
16866 | InvalidDecl = true; | ||||||
16867 | } | ||||||
16868 | } | ||||||
16869 | } | ||||||
16870 | |||||||
16871 | // TR 18037 does not allow fields to be declared with address space | ||||||
16872 | if (T.hasAddressSpace() || T->isDependentAddressSpaceType() || | ||||||
16873 | T->getBaseElementTypeUnsafe()->isDependentAddressSpaceType()) { | ||||||
16874 | Diag(Loc, diag::err_field_with_address_space); | ||||||
16875 | Record->setInvalidDecl(); | ||||||
16876 | InvalidDecl = true; | ||||||
16877 | } | ||||||
16878 | |||||||
16879 | if (LangOpts.OpenCL) { | ||||||
16880 | // OpenCL v1.2 s6.9b,r & OpenCL v2.0 s6.12.5 - The following types cannot be | ||||||
16881 | // used as structure or union field: image, sampler, event or block types. | ||||||
16882 | if (T->isEventT() || T->isImageType() || T->isSamplerT() || | ||||||
16883 | T->isBlockPointerType()) { | ||||||
16884 | Diag(Loc, diag::err_opencl_type_struct_or_union_field) << T; | ||||||
16885 | Record->setInvalidDecl(); | ||||||
16886 | InvalidDecl = true; | ||||||
16887 | } | ||||||
16888 | // OpenCL v1.2 s6.9.c: bitfields are not supported, unless Clang extension | ||||||
16889 | // is enabled. | ||||||
16890 | if (BitWidth && !getOpenCLOptions().isAvailableOption( | ||||||
16891 | "__cl_clang_bitfields", LangOpts)) { | ||||||
16892 | Diag(Loc, diag::err_opencl_bitfields); | ||||||
16893 | InvalidDecl = true; | ||||||
16894 | } | ||||||
16895 | } | ||||||
16896 | |||||||
16897 | // Anonymous bit-fields cannot be cv-qualified (CWG 2229). | ||||||
16898 | if (!InvalidDecl && getLangOpts().CPlusPlus && !II && BitWidth && | ||||||
16899 | T.hasQualifiers()) { | ||||||
16900 | InvalidDecl = true; | ||||||
16901 | Diag(Loc, diag::err_anon_bitfield_qualifiers); | ||||||
16902 | } | ||||||
16903 | |||||||
16904 | // C99 6.7.2.1p8: A member of a structure or union may have any type other | ||||||
16905 | // than a variably modified type. | ||||||
16906 | if (!InvalidDecl && T->isVariablyModifiedType()) { | ||||||
16907 | if (!tryToFixVariablyModifiedVarType( | ||||||
16908 | TInfo, T, Loc, diag::err_typecheck_field_variable_size)) | ||||||
16909 | InvalidDecl = true; | ||||||
16910 | } | ||||||
16911 | |||||||
16912 | // Fields can not have abstract class types | ||||||
16913 | if (!InvalidDecl && RequireNonAbstractType(Loc, T, | ||||||
16914 | diag::err_abstract_type_in_decl, | ||||||
16915 | AbstractFieldType)) | ||||||
16916 | InvalidDecl = true; | ||||||
16917 | |||||||
16918 | bool ZeroWidth = false; | ||||||
16919 | if (InvalidDecl) | ||||||
16920 | BitWidth = nullptr; | ||||||
16921 | // If this is declared as a bit-field, check the bit-field. | ||||||
16922 | if (BitWidth) { | ||||||
16923 | BitWidth = VerifyBitField(Loc, II, T, Record->isMsStruct(Context), BitWidth, | ||||||
16924 | &ZeroWidth).get(); | ||||||
16925 | if (!BitWidth) { | ||||||
16926 | InvalidDecl = true; | ||||||
16927 | BitWidth = nullptr; | ||||||
16928 | ZeroWidth = false; | ||||||
16929 | } | ||||||
16930 | } | ||||||
16931 | |||||||
16932 | // Check that 'mutable' is consistent with the type of the declaration. | ||||||
16933 | if (!InvalidDecl && Mutable) { | ||||||
16934 | unsigned DiagID = 0; | ||||||
16935 | if (T->isReferenceType()) | ||||||
16936 | DiagID = getLangOpts().MSVCCompat ? diag::ext_mutable_reference | ||||||
16937 | : diag::err_mutable_reference; | ||||||
16938 | else if (T.isConstQualified()) | ||||||
16939 | DiagID = diag::err_mutable_const; | ||||||
16940 | |||||||
16941 | if (DiagID) { | ||||||
16942 | SourceLocation ErrLoc = Loc; | ||||||
16943 | if (D && D->getDeclSpec().getStorageClassSpecLoc().isValid()) | ||||||
16944 | ErrLoc = D->getDeclSpec().getStorageClassSpecLoc(); | ||||||
16945 | Diag(ErrLoc, DiagID); | ||||||
16946 | if (DiagID != diag::ext_mutable_reference) { | ||||||
16947 | Mutable = false; | ||||||
16948 | InvalidDecl = true; | ||||||
16949 | } | ||||||
16950 | } | ||||||
16951 | } | ||||||
16952 | |||||||
16953 | // C++11 [class.union]p8 (DR1460): | ||||||
16954 | // At most one variant member of a union may have a | ||||||
16955 | // brace-or-equal-initializer. | ||||||
16956 | if (InitStyle != ICIS_NoInit) | ||||||
16957 | checkDuplicateDefaultInit(*this, cast<CXXRecordDecl>(Record), Loc); | ||||||
16958 | |||||||
16959 | FieldDecl *NewFD = FieldDecl::Create(Context, Record, TSSL, Loc, II, T, TInfo, | ||||||
16960 | BitWidth, Mutable, InitStyle); | ||||||
16961 | if (InvalidDecl) | ||||||
16962 | NewFD->setInvalidDecl(); | ||||||
16963 | |||||||
16964 | if (PrevDecl && !isa<TagDecl>(PrevDecl)) { | ||||||
16965 | Diag(Loc, diag::err_duplicate_member) << II; | ||||||
16966 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
16967 | NewFD->setInvalidDecl(); | ||||||
16968 | } | ||||||
16969 | |||||||
16970 | if (!InvalidDecl && getLangOpts().CPlusPlus) { | ||||||
16971 | if (Record->isUnion()) { | ||||||
16972 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { | ||||||
16973 | CXXRecordDecl* RDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
16974 | if (RDecl->getDefinition()) { | ||||||
16975 | // C++ [class.union]p1: An object of a class with a non-trivial | ||||||
16976 | // constructor, a non-trivial copy constructor, a non-trivial | ||||||
16977 | // destructor, or a non-trivial copy assignment operator | ||||||
16978 | // cannot be a member of a union, nor can an array of such | ||||||
16979 | // objects. | ||||||
16980 | if (CheckNontrivialField(NewFD)) | ||||||
16981 | NewFD->setInvalidDecl(); | ||||||
16982 | } | ||||||
16983 | } | ||||||
16984 | |||||||
16985 | // C++ [class.union]p1: If a union contains a member of reference type, | ||||||
16986 | // the program is ill-formed, except when compiling with MSVC extensions | ||||||
16987 | // enabled. | ||||||
16988 | if (EltTy->isReferenceType()) { | ||||||
16989 | Diag(NewFD->getLocation(), getLangOpts().MicrosoftExt ? | ||||||
16990 | diag::ext_union_member_of_reference_type : | ||||||
16991 | diag::err_union_member_of_reference_type) | ||||||
16992 | << NewFD->getDeclName() << EltTy; | ||||||
16993 | if (!getLangOpts().MicrosoftExt) | ||||||
16994 | NewFD->setInvalidDecl(); | ||||||
16995 | } | ||||||
16996 | } | ||||||
16997 | } | ||||||
16998 | |||||||
16999 | // FIXME: We need to pass in the attributes given an AST | ||||||
17000 | // representation, not a parser representation. | ||||||
17001 | if (D) { | ||||||
17002 | // FIXME: The current scope is almost... but not entirely... correct here. | ||||||
17003 | ProcessDeclAttributes(getCurScope(), NewFD, *D); | ||||||
17004 | |||||||
17005 | if (NewFD->hasAttrs()) | ||||||
17006 | CheckAlignasUnderalignment(NewFD); | ||||||
17007 | } | ||||||
17008 | |||||||
17009 | // In auto-retain/release, infer strong retension for fields of | ||||||
17010 | // retainable type. | ||||||
17011 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewFD)) | ||||||
17012 | NewFD->setInvalidDecl(); | ||||||
17013 | |||||||
17014 | if (T.isObjCGCWeak()) | ||||||
17015 | Diag(Loc, diag::warn_attribute_weak_on_field); | ||||||
17016 | |||||||
17017 | // PPC MMA non-pointer types are not allowed as field types. | ||||||
17018 | if (Context.getTargetInfo().getTriple().isPPC64() && | ||||||
17019 | CheckPPCMMAType(T, NewFD->getLocation())) | ||||||
17020 | NewFD->setInvalidDecl(); | ||||||
17021 | |||||||
17022 | NewFD->setAccess(AS); | ||||||
17023 | return NewFD; | ||||||
17024 | } | ||||||
17025 | |||||||
17026 | bool Sema::CheckNontrivialField(FieldDecl *FD) { | ||||||
17027 | assert(FD)(static_cast <bool> (FD) ? void (0) : __assert_fail ("FD" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17027, __extension__ __PRETTY_FUNCTION__)); | ||||||
17028 | assert(getLangOpts().CPlusPlus && "valid check only for C++")(static_cast <bool> (getLangOpts().CPlusPlus && "valid check only for C++") ? void (0) : __assert_fail ("getLangOpts().CPlusPlus && \"valid check only for C++\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17028, __extension__ __PRETTY_FUNCTION__)); | ||||||
17029 | |||||||
17030 | if (FD->isInvalidDecl() || FD->getType()->isDependentType()) | ||||||
17031 | return false; | ||||||
17032 | |||||||
17033 | QualType EltTy = Context.getBaseElementType(FD->getType()); | ||||||
17034 | if (const RecordType *RT = EltTy->getAs<RecordType>()) { | ||||||
17035 | CXXRecordDecl *RDecl = cast<CXXRecordDecl>(RT->getDecl()); | ||||||
17036 | if (RDecl->getDefinition()) { | ||||||
17037 | // We check for copy constructors before constructors | ||||||
17038 | // because otherwise we'll never get complaints about | ||||||
17039 | // copy constructors. | ||||||
17040 | |||||||
17041 | CXXSpecialMember member = CXXInvalid; | ||||||
17042 | // We're required to check for any non-trivial constructors. Since the | ||||||
17043 | // implicit default constructor is suppressed if there are any | ||||||
17044 | // user-declared constructors, we just need to check that there is a | ||||||
17045 | // trivial default constructor and a trivial copy constructor. (We don't | ||||||
17046 | // worry about move constructors here, since this is a C++98 check.) | ||||||
17047 | if (RDecl->hasNonTrivialCopyConstructor()) | ||||||
17048 | member = CXXCopyConstructor; | ||||||
17049 | else if (!RDecl->hasTrivialDefaultConstructor()) | ||||||
17050 | member = CXXDefaultConstructor; | ||||||
17051 | else if (RDecl->hasNonTrivialCopyAssignment()) | ||||||
17052 | member = CXXCopyAssignment; | ||||||
17053 | else if (RDecl->hasNonTrivialDestructor()) | ||||||
17054 | member = CXXDestructor; | ||||||
17055 | |||||||
17056 | if (member != CXXInvalid) { | ||||||
17057 | if (!getLangOpts().CPlusPlus11 && | ||||||
17058 | getLangOpts().ObjCAutoRefCount && RDecl->hasObjectMember()) { | ||||||
17059 | // Objective-C++ ARC: it is an error to have a non-trivial field of | ||||||
17060 | // a union. However, system headers in Objective-C programs | ||||||
17061 | // occasionally have Objective-C lifetime objects within unions, | ||||||
17062 | // and rather than cause the program to fail, we make those | ||||||
17063 | // members unavailable. | ||||||
17064 | SourceLocation Loc = FD->getLocation(); | ||||||
17065 | if (getSourceManager().isInSystemHeader(Loc)) { | ||||||
17066 | if (!FD->hasAttr<UnavailableAttr>()) | ||||||
17067 | FD->addAttr(UnavailableAttr::CreateImplicit(Context, "", | ||||||
17068 | UnavailableAttr::IR_ARCFieldWithOwnership, Loc)); | ||||||
17069 | return false; | ||||||
17070 | } | ||||||
17071 | } | ||||||
17072 | |||||||
17073 | Diag(FD->getLocation(), getLangOpts().CPlusPlus11 ? | ||||||
17074 | diag::warn_cxx98_compat_nontrivial_union_or_anon_struct_member : | ||||||
17075 | diag::err_illegal_union_or_anon_struct_member) | ||||||
17076 | << FD->getParent()->isUnion() << FD->getDeclName() << member; | ||||||
17077 | DiagnoseNontrivial(RDecl, member); | ||||||
17078 | return !getLangOpts().CPlusPlus11; | ||||||
17079 | } | ||||||
17080 | } | ||||||
17081 | } | ||||||
17082 | |||||||
17083 | return false; | ||||||
17084 | } | ||||||
17085 | |||||||
17086 | /// TranslateIvarVisibility - Translate visibility from a token ID to an | ||||||
17087 | /// AST enum value. | ||||||
17088 | static ObjCIvarDecl::AccessControl | ||||||
17089 | TranslateIvarVisibility(tok::ObjCKeywordKind ivarVisibility) { | ||||||
17090 | switch (ivarVisibility) { | ||||||
17091 | default: llvm_unreachable("Unknown visitibility kind")::llvm::llvm_unreachable_internal("Unknown visitibility kind" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17091); | ||||||
17092 | case tok::objc_private: return ObjCIvarDecl::Private; | ||||||
17093 | case tok::objc_public: return ObjCIvarDecl::Public; | ||||||
17094 | case tok::objc_protected: return ObjCIvarDecl::Protected; | ||||||
17095 | case tok::objc_package: return ObjCIvarDecl::Package; | ||||||
17096 | } | ||||||
17097 | } | ||||||
17098 | |||||||
17099 | /// ActOnIvar - Each ivar field of an objective-c class is passed into this | ||||||
17100 | /// in order to create an IvarDecl object for it. | ||||||
17101 | Decl *Sema::ActOnIvar(Scope *S, | ||||||
17102 | SourceLocation DeclStart, | ||||||
17103 | Declarator &D, Expr *BitfieldWidth, | ||||||
17104 | tok::ObjCKeywordKind Visibility) { | ||||||
17105 | |||||||
17106 | IdentifierInfo *II = D.getIdentifier(); | ||||||
17107 | Expr *BitWidth = (Expr*)BitfieldWidth; | ||||||
17108 | SourceLocation Loc = DeclStart; | ||||||
17109 | if (II) Loc = D.getIdentifierLoc(); | ||||||
17110 | |||||||
17111 | // FIXME: Unnamed fields can be handled in various different ways, for | ||||||
17112 | // example, unnamed unions inject all members into the struct namespace! | ||||||
17113 | |||||||
17114 | TypeSourceInfo *TInfo = GetTypeForDeclarator(D, S); | ||||||
17115 | QualType T = TInfo->getType(); | ||||||
17116 | |||||||
17117 | if (BitWidth) { | ||||||
17118 | // 6.7.2.1p3, 6.7.2.1p4 | ||||||
17119 | BitWidth = VerifyBitField(Loc, II, T, /*IsMsStruct*/false, BitWidth).get(); | ||||||
17120 | if (!BitWidth) | ||||||
17121 | D.setInvalidType(); | ||||||
17122 | } else { | ||||||
17123 | // Not a bitfield. | ||||||
17124 | |||||||
17125 | // validate II. | ||||||
17126 | |||||||
17127 | } | ||||||
17128 | if (T->isReferenceType()) { | ||||||
17129 | Diag(Loc, diag::err_ivar_reference_type); | ||||||
17130 | D.setInvalidType(); | ||||||
17131 | } | ||||||
17132 | // C99 6.7.2.1p8: A member of a structure or union may have any type other | ||||||
17133 | // than a variably modified type. | ||||||
17134 | else if (T->isVariablyModifiedType()) { | ||||||
17135 | if (!tryToFixVariablyModifiedVarType( | ||||||
17136 | TInfo, T, Loc, diag::err_typecheck_ivar_variable_size)) | ||||||
17137 | D.setInvalidType(); | ||||||
17138 | } | ||||||
17139 | |||||||
17140 | // Get the visibility (access control) for this ivar. | ||||||
17141 | ObjCIvarDecl::AccessControl ac = | ||||||
17142 | Visibility != tok::objc_not_keyword ? TranslateIvarVisibility(Visibility) | ||||||
17143 | : ObjCIvarDecl::None; | ||||||
17144 | // Must set ivar's DeclContext to its enclosing interface. | ||||||
17145 | ObjCContainerDecl *EnclosingDecl = cast<ObjCContainerDecl>(CurContext); | ||||||
17146 | if (!EnclosingDecl || EnclosingDecl->isInvalidDecl()) | ||||||
17147 | return nullptr; | ||||||
17148 | ObjCContainerDecl *EnclosingContext; | ||||||
17149 | if (ObjCImplementationDecl *IMPDecl = | ||||||
17150 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { | ||||||
17151 | if (LangOpts.ObjCRuntime.isFragile()) { | ||||||
17152 | // Case of ivar declared in an implementation. Context is that of its class. | ||||||
17153 | EnclosingContext = IMPDecl->getClassInterface(); | ||||||
17154 | assert(EnclosingContext && "Implementation has no class interface!")(static_cast <bool> (EnclosingContext && "Implementation has no class interface!" ) ? void (0) : __assert_fail ("EnclosingContext && \"Implementation has no class interface!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17154, __extension__ __PRETTY_FUNCTION__)); | ||||||
17155 | } | ||||||
17156 | else | ||||||
17157 | EnclosingContext = EnclosingDecl; | ||||||
17158 | } else { | ||||||
17159 | if (ObjCCategoryDecl *CDecl = | ||||||
17160 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { | ||||||
17161 | if (LangOpts.ObjCRuntime.isFragile() || !CDecl->IsClassExtension()) { | ||||||
17162 | Diag(Loc, diag::err_misplaced_ivar) << CDecl->IsClassExtension(); | ||||||
17163 | return nullptr; | ||||||
17164 | } | ||||||
17165 | } | ||||||
17166 | EnclosingContext = EnclosingDecl; | ||||||
17167 | } | ||||||
17168 | |||||||
17169 | // Construct the decl. | ||||||
17170 | ObjCIvarDecl *NewID = ObjCIvarDecl::Create(Context, EnclosingContext, | ||||||
17171 | DeclStart, Loc, II, T, | ||||||
17172 | TInfo, ac, (Expr *)BitfieldWidth); | ||||||
17173 | |||||||
17174 | if (II) { | ||||||
17175 | NamedDecl *PrevDecl = LookupSingleName(S, II, Loc, LookupMemberName, | ||||||
17176 | ForVisibleRedeclaration); | ||||||
17177 | if (PrevDecl && isDeclInScope(PrevDecl, EnclosingContext, S) | ||||||
17178 | && !isa<TagDecl>(PrevDecl)) { | ||||||
17179 | Diag(Loc, diag::err_duplicate_member) << II; | ||||||
17180 | Diag(PrevDecl->getLocation(), diag::note_previous_declaration); | ||||||
17181 | NewID->setInvalidDecl(); | ||||||
17182 | } | ||||||
17183 | } | ||||||
17184 | |||||||
17185 | // Process attributes attached to the ivar. | ||||||
17186 | ProcessDeclAttributes(S, NewID, D); | ||||||
17187 | |||||||
17188 | if (D.isInvalidType()) | ||||||
17189 | NewID->setInvalidDecl(); | ||||||
17190 | |||||||
17191 | // In ARC, infer 'retaining' for ivars of retainable type. | ||||||
17192 | if (getLangOpts().ObjCAutoRefCount && inferObjCARCLifetime(NewID)) | ||||||
17193 | NewID->setInvalidDecl(); | ||||||
17194 | |||||||
17195 | if (D.getDeclSpec().isModulePrivateSpecified()) | ||||||
17196 | NewID->setModulePrivate(); | ||||||
17197 | |||||||
17198 | if (II) { | ||||||
17199 | // FIXME: When interfaces are DeclContexts, we'll need to add | ||||||
17200 | // these to the interface. | ||||||
17201 | S->AddDecl(NewID); | ||||||
17202 | IdResolver.AddDecl(NewID); | ||||||
17203 | } | ||||||
17204 | |||||||
17205 | if (LangOpts.ObjCRuntime.isNonFragile() && | ||||||
17206 | !NewID->isInvalidDecl() && isa<ObjCInterfaceDecl>(EnclosingDecl)) | ||||||
17207 | Diag(Loc, diag::warn_ivars_in_interface); | ||||||
17208 | |||||||
17209 | return NewID; | ||||||
17210 | } | ||||||
17211 | |||||||
17212 | /// ActOnLastBitfield - This routine handles synthesized bitfields rules for | ||||||
17213 | /// class and class extensions. For every class \@interface and class | ||||||
17214 | /// extension \@interface, if the last ivar is a bitfield of any type, | ||||||
17215 | /// then add an implicit `char :0` ivar to the end of that interface. | ||||||
17216 | void Sema::ActOnLastBitfield(SourceLocation DeclLoc, | ||||||
17217 | SmallVectorImpl<Decl *> &AllIvarDecls) { | ||||||
17218 | if (LangOpts.ObjCRuntime.isFragile() || AllIvarDecls.empty()) | ||||||
17219 | return; | ||||||
17220 | |||||||
17221 | Decl *ivarDecl = AllIvarDecls[AllIvarDecls.size()-1]; | ||||||
17222 | ObjCIvarDecl *Ivar = cast<ObjCIvarDecl>(ivarDecl); | ||||||
17223 | |||||||
17224 | if (!Ivar->isBitField() || Ivar->isZeroLengthBitField(Context)) | ||||||
17225 | return; | ||||||
17226 | ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(CurContext); | ||||||
17227 | if (!ID) { | ||||||
17228 | if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(CurContext)) { | ||||||
17229 | if (!CD->IsClassExtension()) | ||||||
17230 | return; | ||||||
17231 | } | ||||||
17232 | // No need to add this to end of @implementation. | ||||||
17233 | else | ||||||
17234 | return; | ||||||
17235 | } | ||||||
17236 | // All conditions are met. Add a new bitfield to the tail end of ivars. | ||||||
17237 | llvm::APInt Zero(Context.getTypeSize(Context.IntTy), 0); | ||||||
17238 | Expr * BW = IntegerLiteral::Create(Context, Zero, Context.IntTy, DeclLoc); | ||||||
17239 | |||||||
17240 | Ivar = ObjCIvarDecl::Create(Context, cast<ObjCContainerDecl>(CurContext), | ||||||
17241 | DeclLoc, DeclLoc, nullptr, | ||||||
17242 | Context.CharTy, | ||||||
17243 | Context.getTrivialTypeSourceInfo(Context.CharTy, | ||||||
17244 | DeclLoc), | ||||||
17245 | ObjCIvarDecl::Private, BW, | ||||||
17246 | true); | ||||||
17247 | AllIvarDecls.push_back(Ivar); | ||||||
17248 | } | ||||||
17249 | |||||||
17250 | void Sema::ActOnFields(Scope *S, SourceLocation RecLoc, Decl *EnclosingDecl, | ||||||
17251 | ArrayRef<Decl *> Fields, SourceLocation LBrac, | ||||||
17252 | SourceLocation RBrac, | ||||||
17253 | const ParsedAttributesView &Attrs) { | ||||||
17254 | assert(EnclosingDecl && "missing record or interface decl")(static_cast <bool> (EnclosingDecl && "missing record or interface decl" ) ? void (0) : __assert_fail ("EnclosingDecl && \"missing record or interface decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17254, __extension__ __PRETTY_FUNCTION__)); | ||||||
17255 | |||||||
17256 | // If this is an Objective-C @implementation or category and we have | ||||||
17257 | // new fields here we should reset the layout of the interface since | ||||||
17258 | // it will now change. | ||||||
17259 | if (!Fields.empty() && isa<ObjCContainerDecl>(EnclosingDecl)) { | ||||||
17260 | ObjCContainerDecl *DC = cast<ObjCContainerDecl>(EnclosingDecl); | ||||||
17261 | switch (DC->getKind()) { | ||||||
17262 | default: break; | ||||||
17263 | case Decl::ObjCCategory: | ||||||
17264 | Context.ResetObjCLayout(cast<ObjCCategoryDecl>(DC)->getClassInterface()); | ||||||
17265 | break; | ||||||
17266 | case Decl::ObjCImplementation: | ||||||
17267 | Context. | ||||||
17268 | ResetObjCLayout(cast<ObjCImplementationDecl>(DC)->getClassInterface()); | ||||||
17269 | break; | ||||||
17270 | } | ||||||
17271 | } | ||||||
17272 | |||||||
17273 | RecordDecl *Record = dyn_cast<RecordDecl>(EnclosingDecl); | ||||||
17274 | CXXRecordDecl *CXXRecord = dyn_cast<CXXRecordDecl>(EnclosingDecl); | ||||||
17275 | |||||||
17276 | // Start counting up the number of named members; make sure to include | ||||||
17277 | // members of anonymous structs and unions in the total. | ||||||
17278 | unsigned NumNamedMembers = 0; | ||||||
17279 | if (Record) { | ||||||
17280 | for (const auto *I : Record->decls()) { | ||||||
17281 | if (const auto *IFD = dyn_cast<IndirectFieldDecl>(I)) | ||||||
17282 | if (IFD->getDeclName()) | ||||||
17283 | ++NumNamedMembers; | ||||||
17284 | } | ||||||
17285 | } | ||||||
17286 | |||||||
17287 | // Verify that all the fields are okay. | ||||||
17288 | SmallVector<FieldDecl*, 32> RecFields; | ||||||
17289 | |||||||
17290 | for (ArrayRef<Decl *>::iterator i = Fields.begin(), end = Fields.end(); | ||||||
17291 | i != end; ++i) { | ||||||
17292 | FieldDecl *FD = cast<FieldDecl>(*i); | ||||||
17293 | |||||||
17294 | // Get the type for the field. | ||||||
17295 | const Type *FDTy = FD->getType().getTypePtr(); | ||||||
17296 | |||||||
17297 | if (!FD->isAnonymousStructOrUnion()) { | ||||||
17298 | // Remember all fields written by the user. | ||||||
17299 | RecFields.push_back(FD); | ||||||
17300 | } | ||||||
17301 | |||||||
17302 | // If the field is already invalid for some reason, don't emit more | ||||||
17303 | // diagnostics about it. | ||||||
17304 | if (FD->isInvalidDecl()) { | ||||||
17305 | EnclosingDecl->setInvalidDecl(); | ||||||
17306 | continue; | ||||||
17307 | } | ||||||
17308 | |||||||
17309 | // C99 6.7.2.1p2: | ||||||
17310 | // A structure or union shall not contain a member with | ||||||
17311 | // incomplete or function type (hence, a structure shall not | ||||||
17312 | // contain an instance of itself, but may contain a pointer to | ||||||
17313 | // an instance of itself), except that the last member of a | ||||||
17314 | // structure with more than one named member may have incomplete | ||||||
17315 | // array type; such a structure (and any union containing, | ||||||
17316 | // possibly recursively, a member that is such a structure) | ||||||
17317 | // shall not be a member of a structure or an element of an | ||||||
17318 | // array. | ||||||
17319 | bool IsLastField = (i + 1 == Fields.end()); | ||||||
17320 | if (FDTy->isFunctionType()) { | ||||||
17321 | // Field declared as a function. | ||||||
17322 | Diag(FD->getLocation(), diag::err_field_declared_as_function) | ||||||
17323 | << FD->getDeclName(); | ||||||
17324 | FD->setInvalidDecl(); | ||||||
17325 | EnclosingDecl->setInvalidDecl(); | ||||||
17326 | continue; | ||||||
17327 | } else if (FDTy->isIncompleteArrayType() && | ||||||
17328 | (Record || isa<ObjCContainerDecl>(EnclosingDecl))) { | ||||||
17329 | if (Record) { | ||||||
17330 | // Flexible array member. | ||||||
17331 | // Microsoft and g++ is more permissive regarding flexible array. | ||||||
17332 | // It will accept flexible array in union and also | ||||||
17333 | // as the sole element of a struct/class. | ||||||
17334 | unsigned DiagID = 0; | ||||||
17335 | if (!Record->isUnion() && !IsLastField) { | ||||||
17336 | Diag(FD->getLocation(), diag::err_flexible_array_not_at_end) | ||||||
17337 | << FD->getDeclName() << FD->getType() << Record->getTagKind(); | ||||||
17338 | Diag((*(i + 1))->getLocation(), diag::note_next_field_declaration); | ||||||
17339 | FD->setInvalidDecl(); | ||||||
17340 | EnclosingDecl->setInvalidDecl(); | ||||||
17341 | continue; | ||||||
17342 | } else if (Record->isUnion()) | ||||||
17343 | DiagID = getLangOpts().MicrosoftExt | ||||||
17344 | ? diag::ext_flexible_array_union_ms | ||||||
17345 | : getLangOpts().CPlusPlus | ||||||
17346 | ? diag::ext_flexible_array_union_gnu | ||||||
17347 | : diag::err_flexible_array_union; | ||||||
17348 | else if (NumNamedMembers < 1) | ||||||
17349 | DiagID = getLangOpts().MicrosoftExt | ||||||
17350 | ? diag::ext_flexible_array_empty_aggregate_ms | ||||||
17351 | : getLangOpts().CPlusPlus | ||||||
17352 | ? diag::ext_flexible_array_empty_aggregate_gnu | ||||||
17353 | : diag::err_flexible_array_empty_aggregate; | ||||||
17354 | |||||||
17355 | if (DiagID) | ||||||
17356 | Diag(FD->getLocation(), DiagID) << FD->getDeclName() | ||||||
17357 | << Record->getTagKind(); | ||||||
17358 | // While the layout of types that contain virtual bases is not specified | ||||||
17359 | // by the C++ standard, both the Itanium and Microsoft C++ ABIs place | ||||||
17360 | // virtual bases after the derived members. This would make a flexible | ||||||
17361 | // array member declared at the end of an object not adjacent to the end | ||||||
17362 | // of the type. | ||||||
17363 | if (CXXRecord && CXXRecord->getNumVBases() != 0) | ||||||
17364 | Diag(FD->getLocation(), diag::err_flexible_array_virtual_base) | ||||||
17365 | << FD->getDeclName() << Record->getTagKind(); | ||||||
17366 | if (!getLangOpts().C99) | ||||||
17367 | Diag(FD->getLocation(), diag::ext_c99_flexible_array_member) | ||||||
17368 | << FD->getDeclName() << Record->getTagKind(); | ||||||
17369 | |||||||
17370 | // If the element type has a non-trivial destructor, we would not | ||||||
17371 | // implicitly destroy the elements, so disallow it for now. | ||||||
17372 | // | ||||||
17373 | // FIXME: GCC allows this. We should probably either implicitly delete | ||||||
17374 | // the destructor of the containing class, or just allow this. | ||||||
17375 | QualType BaseElem = Context.getBaseElementType(FD->getType()); | ||||||
17376 | if (!BaseElem->isDependentType() && BaseElem.isDestructedType()) { | ||||||
17377 | Diag(FD->getLocation(), diag::err_flexible_array_has_nontrivial_dtor) | ||||||
17378 | << FD->getDeclName() << FD->getType(); | ||||||
17379 | FD->setInvalidDecl(); | ||||||
17380 | EnclosingDecl->setInvalidDecl(); | ||||||
17381 | continue; | ||||||
17382 | } | ||||||
17383 | // Okay, we have a legal flexible array member at the end of the struct. | ||||||
17384 | Record->setHasFlexibleArrayMember(true); | ||||||
17385 | } else { | ||||||
17386 | // In ObjCContainerDecl ivars with incomplete array type are accepted, | ||||||
17387 | // unless they are followed by another ivar. That check is done | ||||||
17388 | // elsewhere, after synthesized ivars are known. | ||||||
17389 | } | ||||||
17390 | } else if (!FDTy->isDependentType() && | ||||||
17391 | RequireCompleteSizedType( | ||||||
17392 | FD->getLocation(), FD->getType(), | ||||||
17393 | diag::err_field_incomplete_or_sizeless)) { | ||||||
17394 | // Incomplete type | ||||||
17395 | FD->setInvalidDecl(); | ||||||
17396 | EnclosingDecl->setInvalidDecl(); | ||||||
17397 | continue; | ||||||
17398 | } else if (const RecordType *FDTTy = FDTy->getAs<RecordType>()) { | ||||||
17399 | if (Record && FDTTy->getDecl()->hasFlexibleArrayMember()) { | ||||||
17400 | // A type which contains a flexible array member is considered to be a | ||||||
17401 | // flexible array member. | ||||||
17402 | Record->setHasFlexibleArrayMember(true); | ||||||
17403 | if (!Record->isUnion()) { | ||||||
17404 | // If this is a struct/class and this is not the last element, reject | ||||||
17405 | // it. Note that GCC supports variable sized arrays in the middle of | ||||||
17406 | // structures. | ||||||
17407 | if (!IsLastField) | ||||||
17408 | Diag(FD->getLocation(), diag::ext_variable_sized_type_in_struct) | ||||||
17409 | << FD->getDeclName() << FD->getType(); | ||||||
17410 | else { | ||||||
17411 | // We support flexible arrays at the end of structs in | ||||||
17412 | // other structs as an extension. | ||||||
17413 | Diag(FD->getLocation(), diag::ext_flexible_array_in_struct) | ||||||
17414 | << FD->getDeclName(); | ||||||
17415 | } | ||||||
17416 | } | ||||||
17417 | } | ||||||
17418 | if (isa<ObjCContainerDecl>(EnclosingDecl) && | ||||||
17419 | RequireNonAbstractType(FD->getLocation(), FD->getType(), | ||||||
17420 | diag::err_abstract_type_in_decl, | ||||||
17421 | AbstractIvarType)) { | ||||||
17422 | // Ivars can not have abstract class types | ||||||
17423 | FD->setInvalidDecl(); | ||||||
17424 | } | ||||||
17425 | if (Record && FDTTy->getDecl()->hasObjectMember()) | ||||||
17426 | Record->setHasObjectMember(true); | ||||||
17427 | if (Record && FDTTy->getDecl()->hasVolatileMember()) | ||||||
17428 | Record->setHasVolatileMember(true); | ||||||
17429 | } else if (FDTy->isObjCObjectType()) { | ||||||
17430 | /// A field cannot be an Objective-c object | ||||||
17431 | Diag(FD->getLocation(), diag::err_statically_allocated_object) | ||||||
17432 | << FixItHint::CreateInsertion(FD->getLocation(), "*"); | ||||||
17433 | QualType T = Context.getObjCObjectPointerType(FD->getType()); | ||||||
17434 | FD->setType(T); | ||||||
17435 | } else if (Record && Record->isUnion() && | ||||||
17436 | FD->getType().hasNonTrivialObjCLifetime() && | ||||||
17437 | getSourceManager().isInSystemHeader(FD->getLocation()) && | ||||||
17438 | !getLangOpts().CPlusPlus && !FD->hasAttr<UnavailableAttr>() && | ||||||
17439 | (FD->getType().getObjCLifetime() != Qualifiers::OCL_Strong || | ||||||
17440 | !Context.hasDirectOwnershipQualifier(FD->getType()))) { | ||||||
17441 | // For backward compatibility, fields of C unions declared in system | ||||||
17442 | // headers that have non-trivial ObjC ownership qualifications are marked | ||||||
17443 | // as unavailable unless the qualifier is explicit and __strong. This can | ||||||
17444 | // break ABI compatibility between programs compiled with ARC and MRR, but | ||||||
17445 | // is a better option than rejecting programs using those unions under | ||||||
17446 | // ARC. | ||||||
17447 | FD->addAttr(UnavailableAttr::CreateImplicit( | ||||||
17448 | Context, "", UnavailableAttr::IR_ARCFieldWithOwnership, | ||||||
17449 | FD->getLocation())); | ||||||
17450 | } else if (getLangOpts().ObjC && | ||||||
17451 | getLangOpts().getGC() != LangOptions::NonGC && Record && | ||||||
17452 | !Record->hasObjectMember()) { | ||||||
17453 | if (FD->getType()->isObjCObjectPointerType() || | ||||||
17454 | FD->getType().isObjCGCStrong()) | ||||||
17455 | Record->setHasObjectMember(true); | ||||||
17456 | else if (Context.getAsArrayType(FD->getType())) { | ||||||
17457 | QualType BaseType = Context.getBaseElementType(FD->getType()); | ||||||
17458 | if (BaseType->isRecordType() && | ||||||
17459 | BaseType->castAs<RecordType>()->getDecl()->hasObjectMember()) | ||||||
17460 | Record->setHasObjectMember(true); | ||||||
17461 | else if (BaseType->isObjCObjectPointerType() || | ||||||
17462 | BaseType.isObjCGCStrong()) | ||||||
17463 | Record->setHasObjectMember(true); | ||||||
17464 | } | ||||||
17465 | } | ||||||
17466 | |||||||
17467 | if (Record && !getLangOpts().CPlusPlus && | ||||||
17468 | !shouldIgnoreForRecordTriviality(FD)) { | ||||||
17469 | QualType FT = FD->getType(); | ||||||
17470 | if (FT.isNonTrivialToPrimitiveDefaultInitialize()) { | ||||||
17471 | Record->setNonTrivialToPrimitiveDefaultInitialize(true); | ||||||
17472 | if (FT.hasNonTrivialToPrimitiveDefaultInitializeCUnion() || | ||||||
17473 | Record->isUnion()) | ||||||
17474 | Record->setHasNonTrivialToPrimitiveDefaultInitializeCUnion(true); | ||||||
17475 | } | ||||||
17476 | QualType::PrimitiveCopyKind PCK = FT.isNonTrivialToPrimitiveCopy(); | ||||||
17477 | if (PCK != QualType::PCK_Trivial && PCK != QualType::PCK_VolatileTrivial) { | ||||||
17478 | Record->setNonTrivialToPrimitiveCopy(true); | ||||||
17479 | if (FT.hasNonTrivialToPrimitiveCopyCUnion() || Record->isUnion()) | ||||||
17480 | Record->setHasNonTrivialToPrimitiveCopyCUnion(true); | ||||||
17481 | } | ||||||
17482 | if (FT.isDestructedType()) { | ||||||
17483 | Record->setNonTrivialToPrimitiveDestroy(true); | ||||||
17484 | Record->setParamDestroyedInCallee(true); | ||||||
17485 | if (FT.hasNonTrivialToPrimitiveDestructCUnion() || Record->isUnion()) | ||||||
17486 | Record->setHasNonTrivialToPrimitiveDestructCUnion(true); | ||||||
17487 | } | ||||||
17488 | |||||||
17489 | if (const auto *RT = FT->getAs<RecordType>()) { | ||||||
17490 | if (RT->getDecl()->getArgPassingRestrictions() == | ||||||
17491 | RecordDecl::APK_CanNeverPassInRegs) | ||||||
17492 | Record->setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs); | ||||||
17493 | } else if (FT.getQualifiers().getObjCLifetime() == Qualifiers::OCL_Weak) | ||||||
17494 | Record->setArgPassingRestrictions(RecordDecl::APK_CanNeverPassInRegs); | ||||||
17495 | } | ||||||
17496 | |||||||
17497 | if (Record && FD->getType().isVolatileQualified()) | ||||||
17498 | Record->setHasVolatileMember(true); | ||||||
17499 | // Keep track of the number of named members. | ||||||
17500 | if (FD->getIdentifier()) | ||||||
17501 | ++NumNamedMembers; | ||||||
17502 | } | ||||||
17503 | |||||||
17504 | // Okay, we successfully defined 'Record'. | ||||||
17505 | if (Record) { | ||||||
17506 | bool Completed = false; | ||||||
17507 | if (CXXRecord) { | ||||||
17508 | if (!CXXRecord->isInvalidDecl()) { | ||||||
17509 | // Set access bits correctly on the directly-declared conversions. | ||||||
17510 | for (CXXRecordDecl::conversion_iterator | ||||||
17511 | I = CXXRecord->conversion_begin(), | ||||||
17512 | E = CXXRecord->conversion_end(); I != E; ++I) | ||||||
17513 | I.setAccess((*I)->getAccess()); | ||||||
17514 | } | ||||||
17515 | |||||||
17516 | // Add any implicitly-declared members to this class. | ||||||
17517 | AddImplicitlyDeclaredMembersToClass(CXXRecord); | ||||||
17518 | |||||||
17519 | if (!CXXRecord->isDependentType()) { | ||||||
17520 | if (!CXXRecord->isInvalidDecl()) { | ||||||
17521 | // If we have virtual base classes, we may end up finding multiple | ||||||
17522 | // final overriders for a given virtual function. Check for this | ||||||
17523 | // problem now. | ||||||
17524 | if (CXXRecord->getNumVBases()) { | ||||||
17525 | CXXFinalOverriderMap FinalOverriders; | ||||||
17526 | CXXRecord->getFinalOverriders(FinalOverriders); | ||||||
17527 | |||||||
17528 | for (CXXFinalOverriderMap::iterator M = FinalOverriders.begin(), | ||||||
17529 | MEnd = FinalOverriders.end(); | ||||||
17530 | M != MEnd; ++M) { | ||||||
17531 | for (OverridingMethods::iterator SO = M->second.begin(), | ||||||
17532 | SOEnd = M->second.end(); | ||||||
17533 | SO != SOEnd; ++SO) { | ||||||
17534 | assert(SO->second.size() > 0 &&(static_cast <bool> (SO->second.size() > 0 && "Virtual function without overriding functions?") ? void (0) : __assert_fail ("SO->second.size() > 0 && \"Virtual function without overriding functions?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17535, __extension__ __PRETTY_FUNCTION__)) | ||||||
17535 | "Virtual function without overriding functions?")(static_cast <bool> (SO->second.size() > 0 && "Virtual function without overriding functions?") ? void (0) : __assert_fail ("SO->second.size() > 0 && \"Virtual function without overriding functions?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17535, __extension__ __PRETTY_FUNCTION__)); | ||||||
17536 | if (SO->second.size() == 1) | ||||||
17537 | continue; | ||||||
17538 | |||||||
17539 | // C++ [class.virtual]p2: | ||||||
17540 | // In a derived class, if a virtual member function of a base | ||||||
17541 | // class subobject has more than one final overrider the | ||||||
17542 | // program is ill-formed. | ||||||
17543 | Diag(Record->getLocation(), diag::err_multiple_final_overriders) | ||||||
17544 | << (const NamedDecl *)M->first << Record; | ||||||
17545 | Diag(M->first->getLocation(), | ||||||
17546 | diag::note_overridden_virtual_function); | ||||||
17547 | for (OverridingMethods::overriding_iterator | ||||||
17548 | OM = SO->second.begin(), | ||||||
17549 | OMEnd = SO->second.end(); | ||||||
17550 | OM != OMEnd; ++OM) | ||||||
17551 | Diag(OM->Method->getLocation(), diag::note_final_overrider) | ||||||
17552 | << (const NamedDecl *)M->first << OM->Method->getParent(); | ||||||
17553 | |||||||
17554 | Record->setInvalidDecl(); | ||||||
17555 | } | ||||||
17556 | } | ||||||
17557 | CXXRecord->completeDefinition(&FinalOverriders); | ||||||
17558 | Completed = true; | ||||||
17559 | } | ||||||
17560 | } | ||||||
17561 | } | ||||||
17562 | } | ||||||
17563 | |||||||
17564 | if (!Completed) | ||||||
17565 | Record->completeDefinition(); | ||||||
17566 | |||||||
17567 | // Handle attributes before checking the layout. | ||||||
17568 | ProcessDeclAttributeList(S, Record, Attrs); | ||||||
17569 | |||||||
17570 | // We may have deferred checking for a deleted destructor. Check now. | ||||||
17571 | if (CXXRecord) { | ||||||
17572 | auto *Dtor = CXXRecord->getDestructor(); | ||||||
17573 | if (Dtor && Dtor->isImplicit() && | ||||||
17574 | ShouldDeleteSpecialMember(Dtor, CXXDestructor)) { | ||||||
17575 | CXXRecord->setImplicitDestructorIsDeleted(); | ||||||
17576 | SetDeclDeleted(Dtor, CXXRecord->getLocation()); | ||||||
17577 | } | ||||||
17578 | } | ||||||
17579 | |||||||
17580 | if (Record->hasAttrs()) { | ||||||
17581 | CheckAlignasUnderalignment(Record); | ||||||
17582 | |||||||
17583 | if (const MSInheritanceAttr *IA = Record->getAttr<MSInheritanceAttr>()) | ||||||
17584 | checkMSInheritanceAttrOnDefinition(cast<CXXRecordDecl>(Record), | ||||||
17585 | IA->getRange(), IA->getBestCase(), | ||||||
17586 | IA->getInheritanceModel()); | ||||||
17587 | } | ||||||
17588 | |||||||
17589 | // Check if the structure/union declaration is a type that can have zero | ||||||
17590 | // size in C. For C this is a language extension, for C++ it may cause | ||||||
17591 | // compatibility problems. | ||||||
17592 | bool CheckForZeroSize; | ||||||
17593 | if (!getLangOpts().CPlusPlus) { | ||||||
17594 | CheckForZeroSize = true; | ||||||
17595 | } else { | ||||||
17596 | // For C++ filter out types that cannot be referenced in C code. | ||||||
17597 | CXXRecordDecl *CXXRecord = cast<CXXRecordDecl>(Record); | ||||||
17598 | CheckForZeroSize = | ||||||
17599 | CXXRecord->getLexicalDeclContext()->isExternCContext() && | ||||||
17600 | !CXXRecord->isDependentType() && !inTemplateInstantiation() && | ||||||
17601 | CXXRecord->isCLike(); | ||||||
17602 | } | ||||||
17603 | if (CheckForZeroSize) { | ||||||
17604 | bool ZeroSize = true; | ||||||
17605 | bool IsEmpty = true; | ||||||
17606 | unsigned NonBitFields = 0; | ||||||
17607 | for (RecordDecl::field_iterator I = Record->field_begin(), | ||||||
17608 | E = Record->field_end(); | ||||||
17609 | (NonBitFields == 0 || ZeroSize) && I != E; ++I) { | ||||||
17610 | IsEmpty = false; | ||||||
17611 | if (I->isUnnamedBitfield()) { | ||||||
17612 | if (!I->isZeroLengthBitField(Context)) | ||||||
17613 | ZeroSize = false; | ||||||
17614 | } else { | ||||||
17615 | ++NonBitFields; | ||||||
17616 | QualType FieldType = I->getType(); | ||||||
17617 | if (FieldType->isIncompleteType() || | ||||||
17618 | !Context.getTypeSizeInChars(FieldType).isZero()) | ||||||
17619 | ZeroSize = false; | ||||||
17620 | } | ||||||
17621 | } | ||||||
17622 | |||||||
17623 | // Empty structs are an extension in C (C99 6.7.2.1p7). They are | ||||||
17624 | // allowed in C++, but warn if its declaration is inside | ||||||
17625 | // extern "C" block. | ||||||
17626 | if (ZeroSize) { | ||||||
17627 | Diag(RecLoc, getLangOpts().CPlusPlus ? | ||||||
17628 | diag::warn_zero_size_struct_union_in_extern_c : | ||||||
17629 | diag::warn_zero_size_struct_union_compat) | ||||||
17630 | << IsEmpty << Record->isUnion() << (NonBitFields > 1); | ||||||
17631 | } | ||||||
17632 | |||||||
17633 | // Structs without named members are extension in C (C99 6.7.2.1p7), | ||||||
17634 | // but are accepted by GCC. | ||||||
17635 | if (NonBitFields == 0 && !getLangOpts().CPlusPlus) { | ||||||
17636 | Diag(RecLoc, IsEmpty ? diag::ext_empty_struct_union : | ||||||
17637 | diag::ext_no_named_members_in_struct_union) | ||||||
17638 | << Record->isUnion(); | ||||||
17639 | } | ||||||
17640 | } | ||||||
17641 | } else { | ||||||
17642 | ObjCIvarDecl **ClsFields = | ||||||
17643 | reinterpret_cast<ObjCIvarDecl**>(RecFields.data()); | ||||||
17644 | if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(EnclosingDecl)) { | ||||||
17645 | ID->setEndOfDefinitionLoc(RBrac); | ||||||
17646 | // Add ivar's to class's DeclContext. | ||||||
17647 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { | ||||||
17648 | ClsFields[i]->setLexicalDeclContext(ID); | ||||||
17649 | ID->addDecl(ClsFields[i]); | ||||||
17650 | } | ||||||
17651 | // Must enforce the rule that ivars in the base classes may not be | ||||||
17652 | // duplicates. | ||||||
17653 | if (ID->getSuperClass()) | ||||||
17654 | DiagnoseDuplicateIvars(ID, ID->getSuperClass()); | ||||||
17655 | } else if (ObjCImplementationDecl *IMPDecl = | ||||||
17656 | dyn_cast<ObjCImplementationDecl>(EnclosingDecl)) { | ||||||
17657 | assert(IMPDecl && "ActOnFields - missing ObjCImplementationDecl")(static_cast <bool> (IMPDecl && "ActOnFields - missing ObjCImplementationDecl" ) ? void (0) : __assert_fail ("IMPDecl && \"ActOnFields - missing ObjCImplementationDecl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17657, __extension__ __PRETTY_FUNCTION__)); | ||||||
17658 | for (unsigned I = 0, N = RecFields.size(); I != N; ++I) | ||||||
17659 | // Ivar declared in @implementation never belongs to the implementation. | ||||||
17660 | // Only it is in implementation's lexical context. | ||||||
17661 | ClsFields[I]->setLexicalDeclContext(IMPDecl); | ||||||
17662 | CheckImplementationIvars(IMPDecl, ClsFields, RecFields.size(), RBrac); | ||||||
17663 | IMPDecl->setIvarLBraceLoc(LBrac); | ||||||
17664 | IMPDecl->setIvarRBraceLoc(RBrac); | ||||||
17665 | } else if (ObjCCategoryDecl *CDecl = | ||||||
17666 | dyn_cast<ObjCCategoryDecl>(EnclosingDecl)) { | ||||||
17667 | // case of ivars in class extension; all other cases have been | ||||||
17668 | // reported as errors elsewhere. | ||||||
17669 | // FIXME. Class extension does not have a LocEnd field. | ||||||
17670 | // CDecl->setLocEnd(RBrac); | ||||||
17671 | // Add ivar's to class extension's DeclContext. | ||||||
17672 | // Diagnose redeclaration of private ivars. | ||||||
17673 | ObjCInterfaceDecl *IDecl = CDecl->getClassInterface(); | ||||||
17674 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { | ||||||
17675 | if (IDecl) { | ||||||
17676 | if (const ObjCIvarDecl *ClsIvar = | ||||||
17677 | IDecl->getIvarDecl(ClsFields[i]->getIdentifier())) { | ||||||
17678 | Diag(ClsFields[i]->getLocation(), | ||||||
17679 | diag::err_duplicate_ivar_declaration); | ||||||
17680 | Diag(ClsIvar->getLocation(), diag::note_previous_definition); | ||||||
17681 | continue; | ||||||
17682 | } | ||||||
17683 | for (const auto *Ext : IDecl->known_extensions()) { | ||||||
17684 | if (const ObjCIvarDecl *ClsExtIvar | ||||||
17685 | = Ext->getIvarDecl(ClsFields[i]->getIdentifier())) { | ||||||
17686 | Diag(ClsFields[i]->getLocation(), | ||||||
17687 | diag::err_duplicate_ivar_declaration); | ||||||
17688 | Diag(ClsExtIvar->getLocation(), diag::note_previous_definition); | ||||||
17689 | continue; | ||||||
17690 | } | ||||||
17691 | } | ||||||
17692 | } | ||||||
17693 | ClsFields[i]->setLexicalDeclContext(CDecl); | ||||||
17694 | CDecl->addDecl(ClsFields[i]); | ||||||
17695 | } | ||||||
17696 | CDecl->setIvarLBraceLoc(LBrac); | ||||||
17697 | CDecl->setIvarRBraceLoc(RBrac); | ||||||
17698 | } | ||||||
17699 | } | ||||||
17700 | } | ||||||
17701 | |||||||
17702 | /// Determine whether the given integral value is representable within | ||||||
17703 | /// the given type T. | ||||||
17704 | static bool isRepresentableIntegerValue(ASTContext &Context, | ||||||
17705 | llvm::APSInt &Value, | ||||||
17706 | QualType T) { | ||||||
17707 | assert((T->isIntegralType(Context) || T->isEnumeralType()) &&(static_cast <bool> ((T->isIntegralType(Context) || T ->isEnumeralType()) && "Integral type required!") ? void (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17708, __extension__ __PRETTY_FUNCTION__)) | ||||||
17708 | "Integral type required!")(static_cast <bool> ((T->isIntegralType(Context) || T ->isEnumeralType()) && "Integral type required!") ? void (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17708, __extension__ __PRETTY_FUNCTION__)); | ||||||
17709 | unsigned BitWidth = Context.getIntWidth(T); | ||||||
17710 | |||||||
17711 | if (Value.isUnsigned() || Value.isNonNegative()) { | ||||||
17712 | if (T->isSignedIntegerOrEnumerationType()) | ||||||
17713 | --BitWidth; | ||||||
17714 | return Value.getActiveBits() <= BitWidth; | ||||||
17715 | } | ||||||
17716 | return Value.getMinSignedBits() <= BitWidth; | ||||||
17717 | } | ||||||
17718 | |||||||
17719 | // Given an integral type, return the next larger integral type | ||||||
17720 | // (or a NULL type of no such type exists). | ||||||
17721 | static QualType getNextLargerIntegralType(ASTContext &Context, QualType T) { | ||||||
17722 | // FIXME: Int128/UInt128 support, which also needs to be introduced into | ||||||
17723 | // enum checking below. | ||||||
17724 | assert((T->isIntegralType(Context) ||(static_cast <bool> ((T->isIntegralType(Context) || T ->isEnumeralType()) && "Integral type required!") ? void (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17725, __extension__ __PRETTY_FUNCTION__)) | ||||||
17725 | T->isEnumeralType()) && "Integral type required!")(static_cast <bool> ((T->isIntegralType(Context) || T ->isEnumeralType()) && "Integral type required!") ? void (0) : __assert_fail ("(T->isIntegralType(Context) || T->isEnumeralType()) && \"Integral type required!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17725, __extension__ __PRETTY_FUNCTION__)); | ||||||
17726 | const unsigned NumTypes = 4; | ||||||
17727 | QualType SignedIntegralTypes[NumTypes] = { | ||||||
17728 | Context.ShortTy, Context.IntTy, Context.LongTy, Context.LongLongTy | ||||||
17729 | }; | ||||||
17730 | QualType UnsignedIntegralTypes[NumTypes] = { | ||||||
17731 | Context.UnsignedShortTy, Context.UnsignedIntTy, Context.UnsignedLongTy, | ||||||
17732 | Context.UnsignedLongLongTy | ||||||
17733 | }; | ||||||
17734 | |||||||
17735 | unsigned BitWidth = Context.getTypeSize(T); | ||||||
17736 | QualType *Types = T->isSignedIntegerOrEnumerationType()? SignedIntegralTypes | ||||||
17737 | : UnsignedIntegralTypes; | ||||||
17738 | for (unsigned I = 0; I != NumTypes; ++I) | ||||||
17739 | if (Context.getTypeSize(Types[I]) > BitWidth) | ||||||
17740 | return Types[I]; | ||||||
17741 | |||||||
17742 | return QualType(); | ||||||
17743 | } | ||||||
17744 | |||||||
17745 | EnumConstantDecl *Sema::CheckEnumConstant(EnumDecl *Enum, | ||||||
17746 | EnumConstantDecl *LastEnumConst, | ||||||
17747 | SourceLocation IdLoc, | ||||||
17748 | IdentifierInfo *Id, | ||||||
17749 | Expr *Val) { | ||||||
17750 | unsigned IntWidth = Context.getTargetInfo().getIntWidth(); | ||||||
17751 | llvm::APSInt EnumVal(IntWidth); | ||||||
17752 | QualType EltTy; | ||||||
17753 | |||||||
17754 | if (Val && DiagnoseUnexpandedParameterPack(Val, UPPC_EnumeratorValue)) | ||||||
17755 | Val = nullptr; | ||||||
17756 | |||||||
17757 | if (Val) | ||||||
17758 | Val = DefaultLvalueConversion(Val).get(); | ||||||
17759 | |||||||
17760 | if (Val) { | ||||||
17761 | if (Enum->isDependentType() || Val->isTypeDependent()) | ||||||
17762 | EltTy = Context.DependentTy; | ||||||
17763 | else { | ||||||
17764 | // FIXME: We don't allow folding in C++11 mode for an enum with a fixed | ||||||
17765 | // underlying type, but do allow it in all other contexts. | ||||||
17766 | if (getLangOpts().CPlusPlus11 && Enum->isFixed()) { | ||||||
17767 | // C++11 [dcl.enum]p5: If the underlying type is fixed, [...] the | ||||||
17768 | // constant-expression in the enumerator-definition shall be a converted | ||||||
17769 | // constant expression of the underlying type. | ||||||
17770 | EltTy = Enum->getIntegerType(); | ||||||
17771 | ExprResult Converted = | ||||||
17772 | CheckConvertedConstantExpression(Val, EltTy, EnumVal, | ||||||
17773 | CCEK_Enumerator); | ||||||
17774 | if (Converted.isInvalid()) | ||||||
17775 | Val = nullptr; | ||||||
17776 | else | ||||||
17777 | Val = Converted.get(); | ||||||
17778 | } else if (!Val->isValueDependent() && | ||||||
17779 | !(Val = | ||||||
17780 | VerifyIntegerConstantExpression(Val, &EnumVal, AllowFold) | ||||||
17781 | .get())) { | ||||||
17782 | // C99 6.7.2.2p2: Make sure we have an integer constant expression. | ||||||
17783 | } else { | ||||||
17784 | if (Enum->isComplete()) { | ||||||
17785 | EltTy = Enum->getIntegerType(); | ||||||
17786 | |||||||
17787 | // In Obj-C and Microsoft mode, require the enumeration value to be | ||||||
17788 | // representable in the underlying type of the enumeration. In C++11, | ||||||
17789 | // we perform a non-narrowing conversion as part of converted constant | ||||||
17790 | // expression checking. | ||||||
17791 | if (!isRepresentableIntegerValue(Context, EnumVal, EltTy)) { | ||||||
17792 | if (Context.getTargetInfo() | ||||||
17793 | .getTriple() | ||||||
17794 | .isWindowsMSVCEnvironment()) { | ||||||
17795 | Diag(IdLoc, diag::ext_enumerator_too_large) << EltTy; | ||||||
17796 | } else { | ||||||
17797 | Diag(IdLoc, diag::err_enumerator_too_large) << EltTy; | ||||||
17798 | } | ||||||
17799 | } | ||||||
17800 | |||||||
17801 | // Cast to the underlying type. | ||||||
17802 | Val = ImpCastExprToType(Val, EltTy, | ||||||
17803 | EltTy->isBooleanType() ? CK_IntegralToBoolean | ||||||
17804 | : CK_IntegralCast) | ||||||
17805 | .get(); | ||||||
17806 | } else if (getLangOpts().CPlusPlus) { | ||||||
17807 | // C++11 [dcl.enum]p5: | ||||||
17808 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17809 | // is the type of its initializing value: | ||||||
17810 | // - If an initializer is specified for an enumerator, the | ||||||
17811 | // initializing value has the same type as the expression. | ||||||
17812 | EltTy = Val->getType(); | ||||||
17813 | } else { | ||||||
17814 | // C99 6.7.2.2p2: | ||||||
17815 | // The expression that defines the value of an enumeration constant | ||||||
17816 | // shall be an integer constant expression that has a value | ||||||
17817 | // representable as an int. | ||||||
17818 | |||||||
17819 | // Complain if the value is not representable in an int. | ||||||
17820 | if (!isRepresentableIntegerValue(Context, EnumVal, Context.IntTy)) | ||||||
17821 | Diag(IdLoc, diag::ext_enum_value_not_int) | ||||||
17822 | << toString(EnumVal, 10) << Val->getSourceRange() | ||||||
17823 | << (EnumVal.isUnsigned() || EnumVal.isNonNegative()); | ||||||
17824 | else if (!Context.hasSameType(Val->getType(), Context.IntTy)) { | ||||||
17825 | // Force the type of the expression to 'int'. | ||||||
17826 | Val = ImpCastExprToType(Val, Context.IntTy, CK_IntegralCast).get(); | ||||||
17827 | } | ||||||
17828 | EltTy = Val->getType(); | ||||||
17829 | } | ||||||
17830 | } | ||||||
17831 | } | ||||||
17832 | } | ||||||
17833 | |||||||
17834 | if (!Val) { | ||||||
17835 | if (Enum->isDependentType()) | ||||||
17836 | EltTy = Context.DependentTy; | ||||||
17837 | else if (!LastEnumConst) { | ||||||
17838 | // C++0x [dcl.enum]p5: | ||||||
17839 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17840 | // is the type of its initializing value: | ||||||
17841 | // - If no initializer is specified for the first enumerator, the | ||||||
17842 | // initializing value has an unspecified integral type. | ||||||
17843 | // | ||||||
17844 | // GCC uses 'int' for its unspecified integral type, as does | ||||||
17845 | // C99 6.7.2.2p3. | ||||||
17846 | if (Enum->isFixed()) { | ||||||
17847 | EltTy = Enum->getIntegerType(); | ||||||
17848 | } | ||||||
17849 | else { | ||||||
17850 | EltTy = Context.IntTy; | ||||||
17851 | } | ||||||
17852 | } else { | ||||||
17853 | // Assign the last value + 1. | ||||||
17854 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17855 | ++EnumVal; | ||||||
17856 | EltTy = LastEnumConst->getType(); | ||||||
17857 | |||||||
17858 | // Check for overflow on increment. | ||||||
17859 | if (EnumVal < LastEnumConst->getInitVal()) { | ||||||
17860 | // C++0x [dcl.enum]p5: | ||||||
17861 | // If the underlying type is not fixed, the type of each enumerator | ||||||
17862 | // is the type of its initializing value: | ||||||
17863 | // | ||||||
17864 | // - Otherwise the type of the initializing value is the same as | ||||||
17865 | // the type of the initializing value of the preceding enumerator | ||||||
17866 | // unless the incremented value is not representable in that type, | ||||||
17867 | // in which case the type is an unspecified integral type | ||||||
17868 | // sufficient to contain the incremented value. If no such type | ||||||
17869 | // exists, the program is ill-formed. | ||||||
17870 | QualType T = getNextLargerIntegralType(Context, EltTy); | ||||||
17871 | if (T.isNull() || Enum->isFixed()) { | ||||||
17872 | // There is no integral type larger enough to represent this | ||||||
17873 | // value. Complain, then allow the value to wrap around. | ||||||
17874 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17875 | EnumVal = EnumVal.zext(EnumVal.getBitWidth() * 2); | ||||||
17876 | ++EnumVal; | ||||||
17877 | if (Enum->isFixed()) | ||||||
17878 | // When the underlying type is fixed, this is ill-formed. | ||||||
17879 | Diag(IdLoc, diag::err_enumerator_wrapped) | ||||||
17880 | << toString(EnumVal, 10) | ||||||
17881 | << EltTy; | ||||||
17882 | else | ||||||
17883 | Diag(IdLoc, diag::ext_enumerator_increment_too_large) | ||||||
17884 | << toString(EnumVal, 10); | ||||||
17885 | } else { | ||||||
17886 | EltTy = T; | ||||||
17887 | } | ||||||
17888 | |||||||
17889 | // Retrieve the last enumerator's value, extent that type to the | ||||||
17890 | // type that is supposed to be large enough to represent the incremented | ||||||
17891 | // value, then increment. | ||||||
17892 | EnumVal = LastEnumConst->getInitVal(); | ||||||
17893 | EnumVal.setIsSigned(EltTy->isSignedIntegerOrEnumerationType()); | ||||||
17894 | EnumVal = EnumVal.zextOrTrunc(Context.getIntWidth(EltTy)); | ||||||
17895 | ++EnumVal; | ||||||
17896 | |||||||
17897 | // If we're not in C++, diagnose the overflow of enumerator values, | ||||||
17898 | // which in C99 means that the enumerator value is not representable in | ||||||
17899 | // an int (C99 6.7.2.2p2). However, we support GCC's extension that | ||||||
17900 | // permits enumerator values that are representable in some larger | ||||||
17901 | // integral type. | ||||||
17902 | if (!getLangOpts().CPlusPlus && !T.isNull()) | ||||||
17903 | Diag(IdLoc, diag::warn_enum_value_overflow); | ||||||
17904 | } else if (!getLangOpts().CPlusPlus && | ||||||
17905 | !isRepresentableIntegerValue(Context, EnumVal, EltTy)) { | ||||||
17906 | // Enforce C99 6.7.2.2p2 even when we compute the next value. | ||||||
17907 | Diag(IdLoc, diag::ext_enum_value_not_int) | ||||||
17908 | << toString(EnumVal, 10) << 1; | ||||||
17909 | } | ||||||
17910 | } | ||||||
17911 | } | ||||||
17912 | |||||||
17913 | if (!EltTy->isDependentType()) { | ||||||
17914 | // Make the enumerator value match the signedness and size of the | ||||||
17915 | // enumerator's type. | ||||||
17916 | EnumVal = EnumVal.extOrTrunc(Context.getIntWidth(EltTy)); | ||||||
17917 | EnumVal.setIsSigned(EltTy->isSignedIntegerOrEnumerationType()); | ||||||
17918 | } | ||||||
17919 | |||||||
17920 | return EnumConstantDecl::Create(Context, Enum, IdLoc, Id, EltTy, | ||||||
17921 | Val, EnumVal); | ||||||
17922 | } | ||||||
17923 | |||||||
17924 | Sema::SkipBodyInfo Sema::shouldSkipAnonEnumBody(Scope *S, IdentifierInfo *II, | ||||||
17925 | SourceLocation IILoc) { | ||||||
17926 | if (!(getLangOpts().Modules || getLangOpts().ModulesLocalVisibility) || | ||||||
17927 | !getLangOpts().CPlusPlus) | ||||||
17928 | return SkipBodyInfo(); | ||||||
17929 | |||||||
17930 | // We have an anonymous enum definition. Look up the first enumerator to | ||||||
17931 | // determine if we should merge the definition with an existing one and | ||||||
17932 | // skip the body. | ||||||
17933 | NamedDecl *PrevDecl = LookupSingleName(S, II, IILoc, LookupOrdinaryName, | ||||||
17934 | forRedeclarationInCurContext()); | ||||||
17935 | auto *PrevECD = dyn_cast_or_null<EnumConstantDecl>(PrevDecl); | ||||||
17936 | if (!PrevECD) | ||||||
17937 | return SkipBodyInfo(); | ||||||
17938 | |||||||
17939 | EnumDecl *PrevED = cast<EnumDecl>(PrevECD->getDeclContext()); | ||||||
17940 | NamedDecl *Hidden; | ||||||
17941 | if (!PrevED->getDeclName() && !hasVisibleDefinition(PrevED, &Hidden)) { | ||||||
17942 | SkipBodyInfo Skip; | ||||||
17943 | Skip.Previous = Hidden; | ||||||
17944 | return Skip; | ||||||
17945 | } | ||||||
17946 | |||||||
17947 | return SkipBodyInfo(); | ||||||
17948 | } | ||||||
17949 | |||||||
17950 | Decl *Sema::ActOnEnumConstant(Scope *S, Decl *theEnumDecl, Decl *lastEnumConst, | ||||||
17951 | SourceLocation IdLoc, IdentifierInfo *Id, | ||||||
17952 | const ParsedAttributesView &Attrs, | ||||||
17953 | SourceLocation EqualLoc, Expr *Val) { | ||||||
17954 | EnumDecl *TheEnumDecl = cast<EnumDecl>(theEnumDecl); | ||||||
17955 | EnumConstantDecl *LastEnumConst = | ||||||
17956 | cast_or_null<EnumConstantDecl>(lastEnumConst); | ||||||
17957 | |||||||
17958 | // The scope passed in may not be a decl scope. Zip up the scope tree until | ||||||
17959 | // we find one that is. | ||||||
17960 | S = getNonFieldDeclScope(S); | ||||||
17961 | |||||||
17962 | // Verify that there isn't already something declared with this name in this | ||||||
17963 | // scope. | ||||||
17964 | LookupResult R(*this, Id, IdLoc, LookupOrdinaryName, ForVisibleRedeclaration); | ||||||
17965 | LookupName(R, S); | ||||||
17966 | NamedDecl *PrevDecl = R.getAsSingle<NamedDecl>(); | ||||||
17967 | |||||||
17968 | if (PrevDecl && PrevDecl->isTemplateParameter()) { | ||||||
17969 | // Maybe we will complain about the shadowed template parameter. | ||||||
17970 | DiagnoseTemplateParameterShadow(IdLoc, PrevDecl); | ||||||
17971 | // Just pretend that we didn't see the previous declaration. | ||||||
17972 | PrevDecl = nullptr; | ||||||
17973 | } | ||||||
17974 | |||||||
17975 | // C++ [class.mem]p15: | ||||||
17976 | // If T is the name of a class, then each of the following shall have a name | ||||||
17977 | // different from T: | ||||||
17978 | // - every enumerator of every member of class T that is an unscoped | ||||||
17979 | // enumerated type | ||||||
17980 | if (getLangOpts().CPlusPlus && !TheEnumDecl->isScoped()) | ||||||
17981 | DiagnoseClassNameShadow(TheEnumDecl->getDeclContext(), | ||||||
17982 | DeclarationNameInfo(Id, IdLoc)); | ||||||
17983 | |||||||
17984 | EnumConstantDecl *New = | ||||||
17985 | CheckEnumConstant(TheEnumDecl, LastEnumConst, IdLoc, Id, Val); | ||||||
17986 | if (!New) | ||||||
17987 | return nullptr; | ||||||
17988 | |||||||
17989 | if (PrevDecl) { | ||||||
17990 | if (!TheEnumDecl->isScoped() && isa<ValueDecl>(PrevDecl)) { | ||||||
17991 | // Check for other kinds of shadowing not already handled. | ||||||
17992 | CheckShadow(New, PrevDecl, R); | ||||||
17993 | } | ||||||
17994 | |||||||
17995 | // When in C++, we may get a TagDecl with the same name; in this case the | ||||||
17996 | // enum constant will 'hide' the tag. | ||||||
17997 | assert((getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) &&(static_cast <bool> ((getLangOpts().CPlusPlus || !isa< TagDecl>(PrevDecl)) && "Received TagDecl when not in C++!" ) ? void (0) : __assert_fail ("(getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) && \"Received TagDecl when not in C++!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17998, __extension__ __PRETTY_FUNCTION__)) | ||||||
17998 | "Received TagDecl when not in C++!")(static_cast <bool> ((getLangOpts().CPlusPlus || !isa< TagDecl>(PrevDecl)) && "Received TagDecl when not in C++!" ) ? void (0) : __assert_fail ("(getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) && \"Received TagDecl when not in C++!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 17998, __extension__ __PRETTY_FUNCTION__)); | ||||||
17999 | if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S)) { | ||||||
18000 | if (isa<EnumConstantDecl>(PrevDecl)) | ||||||
18001 | Diag(IdLoc, diag::err_redefinition_of_enumerator) << Id; | ||||||
18002 | else | ||||||
18003 | Diag(IdLoc, diag::err_redefinition) << Id; | ||||||
18004 | notePreviousDefinition(PrevDecl, IdLoc); | ||||||
18005 | return nullptr; | ||||||
18006 | } | ||||||
18007 | } | ||||||
18008 | |||||||
18009 | // Process attributes. | ||||||
18010 | ProcessDeclAttributeList(S, New, Attrs); | ||||||
18011 | AddPragmaAttributes(S, New); | ||||||
18012 | |||||||
18013 | // Register this decl in the current scope stack. | ||||||
18014 | New->setAccess(TheEnumDecl->getAccess()); | ||||||
18015 | PushOnScopeChains(New, S); | ||||||
18016 | |||||||
18017 | ActOnDocumentableDecl(New); | ||||||
18018 | |||||||
18019 | return New; | ||||||
18020 | } | ||||||
18021 | |||||||
18022 | // Returns true when the enum initial expression does not trigger the | ||||||
18023 | // duplicate enum warning. A few common cases are exempted as follows: | ||||||
18024 | // Element2 = Element1 | ||||||
18025 | // Element2 = Element1 + 1 | ||||||
18026 | // Element2 = Element1 - 1 | ||||||
18027 | // Where Element2 and Element1 are from the same enum. | ||||||
18028 | static bool ValidDuplicateEnum(EnumConstantDecl *ECD, EnumDecl *Enum) { | ||||||
18029 | Expr *InitExpr = ECD->getInitExpr(); | ||||||
18030 | if (!InitExpr) | ||||||
18031 | return true; | ||||||
18032 | InitExpr = InitExpr->IgnoreImpCasts(); | ||||||
18033 | |||||||
18034 | if (BinaryOperator *BO = dyn_cast<BinaryOperator>(InitExpr)) { | ||||||
18035 | if (!BO->isAdditiveOp()) | ||||||
18036 | return true; | ||||||
18037 | IntegerLiteral *IL = dyn_cast<IntegerLiteral>(BO->getRHS()); | ||||||
18038 | if (!IL) | ||||||
18039 | return true; | ||||||
18040 | if (IL->getValue() != 1) | ||||||
18041 | return true; | ||||||
18042 | |||||||
18043 | InitExpr = BO->getLHS(); | ||||||
18044 | } | ||||||
18045 | |||||||
18046 | // This checks if the elements are from the same enum. | ||||||
18047 | DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(InitExpr); | ||||||
18048 | if (!DRE) | ||||||
18049 | return true; | ||||||
18050 | |||||||
18051 | EnumConstantDecl *EnumConstant = dyn_cast<EnumConstantDecl>(DRE->getDecl()); | ||||||
18052 | if (!EnumConstant) | ||||||
18053 | return true; | ||||||
18054 | |||||||
18055 | if (cast<EnumDecl>(TagDecl::castFromDeclContext(ECD->getDeclContext())) != | ||||||
18056 | Enum) | ||||||
18057 | return true; | ||||||
18058 | |||||||
18059 | return false; | ||||||
18060 | } | ||||||
18061 | |||||||
18062 | // Emits a warning when an element is implicitly set a value that | ||||||
18063 | // a previous element has already been set to. | ||||||
18064 | static void CheckForDuplicateEnumValues(Sema &S, ArrayRef<Decl *> Elements, | ||||||
18065 | EnumDecl *Enum, QualType EnumType) { | ||||||
18066 | // Avoid anonymous enums | ||||||
18067 | if (!Enum->getIdentifier()) | ||||||
18068 | return; | ||||||
18069 | |||||||
18070 | // Only check for small enums. | ||||||
18071 | if (Enum->getNumPositiveBits() > 63 || Enum->getNumNegativeBits() > 64) | ||||||
18072 | return; | ||||||
18073 | |||||||
18074 | if (S.Diags.isIgnored(diag::warn_duplicate_enum_values, Enum->getLocation())) | ||||||
18075 | return; | ||||||
18076 | |||||||
18077 | typedef SmallVector<EnumConstantDecl *, 3> ECDVector; | ||||||
18078 | typedef SmallVector<std::unique_ptr<ECDVector>, 3> DuplicatesVector; | ||||||
18079 | |||||||
18080 | typedef llvm::PointerUnion<EnumConstantDecl*, ECDVector*> DeclOrVector; | ||||||
18081 | |||||||
18082 | // DenseMaps cannot contain the all ones int64_t value, so use unordered_map. | ||||||
18083 | typedef std::unordered_map<int64_t, DeclOrVector> ValueToVectorMap; | ||||||
18084 | |||||||
18085 | // Use int64_t as a key to avoid needing special handling for map keys. | ||||||
18086 | auto EnumConstantToKey = [](const EnumConstantDecl *D) { | ||||||
18087 | llvm::APSInt Val = D->getInitVal(); | ||||||
18088 | return Val.isSigned() ? Val.getSExtValue() : Val.getZExtValue(); | ||||||
18089 | }; | ||||||
18090 | |||||||
18091 | DuplicatesVector DupVector; | ||||||
18092 | ValueToVectorMap EnumMap; | ||||||
18093 | |||||||
18094 | // Populate the EnumMap with all values represented by enum constants without | ||||||
18095 | // an initializer. | ||||||
18096 | for (auto *Element : Elements) { | ||||||
18097 | EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(Element); | ||||||
18098 | |||||||
18099 | // Null EnumConstantDecl means a previous diagnostic has been emitted for | ||||||
18100 | // this constant. Skip this enum since it may be ill-formed. | ||||||
18101 | if (!ECD) { | ||||||
18102 | return; | ||||||
18103 | } | ||||||
18104 | |||||||
18105 | // Constants with initalizers are handled in the next loop. | ||||||
18106 | if (ECD->getInitExpr()) | ||||||
18107 | continue; | ||||||
18108 | |||||||
18109 | // Duplicate values are handled in the next loop. | ||||||
18110 | EnumMap.insert({EnumConstantToKey(ECD), ECD}); | ||||||
18111 | } | ||||||
18112 | |||||||
18113 | if (EnumMap.size() == 0) | ||||||
18114 | return; | ||||||
18115 | |||||||
18116 | // Create vectors for any values that has duplicates. | ||||||
18117 | for (auto *Element : Elements) { | ||||||
18118 | // The last loop returned if any constant was null. | ||||||
18119 | EnumConstantDecl *ECD = cast<EnumConstantDecl>(Element); | ||||||
18120 | if (!ValidDuplicateEnum(ECD, Enum)) | ||||||
18121 | continue; | ||||||
18122 | |||||||
18123 | auto Iter = EnumMap.find(EnumConstantToKey(ECD)); | ||||||
18124 | if (Iter == EnumMap.end()) | ||||||
18125 | continue; | ||||||
18126 | |||||||
18127 | DeclOrVector& Entry = Iter->second; | ||||||
18128 | if (EnumConstantDecl *D = Entry.dyn_cast<EnumConstantDecl*>()) { | ||||||
18129 | // Ensure constants are different. | ||||||
18130 | if (D == ECD) | ||||||
18131 | continue; | ||||||
18132 | |||||||
18133 | // Create new vector and push values onto it. | ||||||
18134 | auto Vec = std::make_unique<ECDVector>(); | ||||||
18135 | Vec->push_back(D); | ||||||
18136 | Vec->push_back(ECD); | ||||||
18137 | |||||||
18138 | // Update entry to point to the duplicates vector. | ||||||
18139 | Entry = Vec.get(); | ||||||
18140 | |||||||
18141 | // Store the vector somewhere we can consult later for quick emission of | ||||||
18142 | // diagnostics. | ||||||
18143 | DupVector.emplace_back(std::move(Vec)); | ||||||
18144 | continue; | ||||||
18145 | } | ||||||
18146 | |||||||
18147 | ECDVector *Vec = Entry.get<ECDVector*>(); | ||||||
18148 | // Make sure constants are not added more than once. | ||||||
18149 | if (*Vec->begin() == ECD) | ||||||
18150 | continue; | ||||||
18151 | |||||||
18152 | Vec->push_back(ECD); | ||||||
18153 | } | ||||||
18154 | |||||||
18155 | // Emit diagnostics. | ||||||
18156 | for (const auto &Vec : DupVector) { | ||||||
18157 | assert(Vec->size() > 1 && "ECDVector should have at least 2 elements.")(static_cast <bool> (Vec->size() > 1 && "ECDVector should have at least 2 elements." ) ? void (0) : __assert_fail ("Vec->size() > 1 && \"ECDVector should have at least 2 elements.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 18157, __extension__ __PRETTY_FUNCTION__)); | ||||||
18158 | |||||||
18159 | // Emit warning for one enum constant. | ||||||
18160 | auto *FirstECD = Vec->front(); | ||||||
18161 | S.Diag(FirstECD->getLocation(), diag::warn_duplicate_enum_values) | ||||||
18162 | << FirstECD << toString(FirstECD->getInitVal(), 10) | ||||||
18163 | << FirstECD->getSourceRange(); | ||||||
18164 | |||||||
18165 | // Emit one note for each of the remaining enum constants with | ||||||
18166 | // the same value. | ||||||
18167 | for (auto *ECD : llvm::make_range(Vec->begin() + 1, Vec->end())) | ||||||
18168 | S.Diag(ECD->getLocation(), diag::note_duplicate_element) | ||||||
18169 | << ECD << toString(ECD->getInitVal(), 10) | ||||||
18170 | << ECD->getSourceRange(); | ||||||
18171 | } | ||||||
18172 | } | ||||||
18173 | |||||||
18174 | bool Sema::IsValueInFlagEnum(const EnumDecl *ED, const llvm::APInt &Val, | ||||||
18175 | bool AllowMask) const { | ||||||
18176 | assert(ED->isClosedFlag() && "looking for value in non-flag or open enum")(static_cast <bool> (ED->isClosedFlag() && "looking for value in non-flag or open enum" ) ? void (0) : __assert_fail ("ED->isClosedFlag() && \"looking for value in non-flag or open enum\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 18176, __extension__ __PRETTY_FUNCTION__)); | ||||||
18177 | assert(ED->isCompleteDefinition() && "expected enum definition")(static_cast <bool> (ED->isCompleteDefinition() && "expected enum definition") ? void (0) : __assert_fail ("ED->isCompleteDefinition() && \"expected enum definition\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 18177, __extension__ __PRETTY_FUNCTION__)); | ||||||
18178 | |||||||
18179 | auto R = FlagBitsCache.insert(std::make_pair(ED, llvm::APInt())); | ||||||
18180 | llvm::APInt &FlagBits = R.first->second; | ||||||
18181 | |||||||
18182 | if (R.second) { | ||||||
18183 | for (auto *E : ED->enumerators()) { | ||||||
18184 | const auto &EVal = E->getInitVal(); | ||||||
18185 | // Only single-bit enumerators introduce new flag values. | ||||||
18186 | if (EVal.isPowerOf2()) | ||||||
18187 | FlagBits = FlagBits.zextOrSelf(EVal.getBitWidth()) | EVal; | ||||||
18188 | } | ||||||
18189 | } | ||||||
18190 | |||||||
18191 | // A value is in a flag enum if either its bits are a subset of the enum's | ||||||
18192 | // flag bits (the first condition) or we are allowing masks and the same is | ||||||
18193 | // true of its complement (the second condition). When masks are allowed, we | ||||||
18194 | // allow the common idiom of ~(enum1 | enum2) to be a valid enum value. | ||||||
18195 | // | ||||||
18196 | // While it's true that any value could be used as a mask, the assumption is | ||||||
18197 | // that a mask will have all of the insignificant bits set. Anything else is | ||||||
18198 | // likely a logic error. | ||||||
18199 | llvm::APInt FlagMask = ~FlagBits.zextOrTrunc(Val.getBitWidth()); | ||||||
18200 | return !(FlagMask & Val) || (AllowMask && !(FlagMask & ~Val)); | ||||||
18201 | } | ||||||
18202 | |||||||
18203 | void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceRange BraceRange, | ||||||
18204 | Decl *EnumDeclX, ArrayRef<Decl *> Elements, Scope *S, | ||||||
18205 | const ParsedAttributesView &Attrs) { | ||||||
18206 | EnumDecl *Enum = cast<EnumDecl>(EnumDeclX); | ||||||
18207 | QualType EnumType = Context.getTypeDeclType(Enum); | ||||||
18208 | |||||||
18209 | ProcessDeclAttributeList(S, Enum, Attrs); | ||||||
18210 | |||||||
18211 | if (Enum->isDependentType()) { | ||||||
18212 | for (unsigned i = 0, e = Elements.size(); i != e; ++i) { | ||||||
18213 | EnumConstantDecl *ECD = | ||||||
18214 | cast_or_null<EnumConstantDecl>(Elements[i]); | ||||||
18215 | if (!ECD) continue; | ||||||
18216 | |||||||
18217 | ECD->setType(EnumType); | ||||||
18218 | } | ||||||
18219 | |||||||
18220 | Enum->completeDefinition(Context.DependentTy, Context.DependentTy, 0, 0); | ||||||
18221 | return; | ||||||
18222 | } | ||||||
18223 | |||||||
18224 | // TODO: If the result value doesn't fit in an int, it must be a long or long | ||||||
18225 | // long value. ISO C does not support this, but GCC does as an extension, | ||||||
18226 | // emit a warning. | ||||||
18227 | unsigned IntWidth = Context.getTargetInfo().getIntWidth(); | ||||||
18228 | unsigned CharWidth = Context.getTargetInfo().getCharWidth(); | ||||||
18229 | unsigned ShortWidth = Context.getTargetInfo().getShortWidth(); | ||||||
18230 | |||||||
18231 | // Verify that all the values are okay, compute the size of the values, and | ||||||
18232 | // reverse the list. | ||||||
18233 | unsigned NumNegativeBits = 0; | ||||||
18234 | unsigned NumPositiveBits = 0; | ||||||
18235 | |||||||
18236 | // Keep track of whether all elements have type int. | ||||||
18237 | bool AllElementsInt = true; | ||||||
18238 | |||||||
18239 | for (unsigned i = 0, e = Elements.size(); i != e; ++i) { | ||||||
18240 | EnumConstantDecl *ECD = | ||||||
18241 | cast_or_null<EnumConstantDecl>(Elements[i]); | ||||||
18242 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
18243 | |||||||
18244 | const llvm::APSInt &InitVal = ECD->getInitVal(); | ||||||
18245 | |||||||
18246 | // Keep track of the size of positive and negative values. | ||||||
18247 | if (InitVal.isUnsigned() || InitVal.isNonNegative()) | ||||||
18248 | NumPositiveBits = std::max(NumPositiveBits, | ||||||
18249 | (unsigned)InitVal.getActiveBits()); | ||||||
18250 | else | ||||||
18251 | NumNegativeBits = std::max(NumNegativeBits, | ||||||
18252 | (unsigned)InitVal.getMinSignedBits()); | ||||||
18253 | |||||||
18254 | // Keep track of whether every enum element has type int (very common). | ||||||
18255 | if (AllElementsInt) | ||||||
18256 | AllElementsInt = ECD->getType() == Context.IntTy; | ||||||
18257 | } | ||||||
18258 | |||||||
18259 | // Figure out the type that should be used for this enum. | ||||||
18260 | QualType BestType; | ||||||
18261 | unsigned BestWidth; | ||||||
18262 | |||||||
18263 | // C++0x N3000 [conv.prom]p3: | ||||||
18264 | // An rvalue of an unscoped enumeration type whose underlying | ||||||
18265 | // type is not fixed can be converted to an rvalue of the first | ||||||
18266 | // of the following types that can represent all the values of | ||||||
18267 | // the enumeration: int, unsigned int, long int, unsigned long | ||||||
18268 | // int, long long int, or unsigned long long int. | ||||||
18269 | // C99 6.4.4.3p2: | ||||||
18270 | // An identifier declared as an enumeration constant has type int. | ||||||
18271 | // The C99 rule is modified by a gcc extension | ||||||
18272 | QualType BestPromotionType; | ||||||
18273 | |||||||
18274 | bool Packed = Enum->hasAttr<PackedAttr>(); | ||||||
18275 | // -fshort-enums is the equivalent to specifying the packed attribute on all | ||||||
18276 | // enum definitions. | ||||||
18277 | if (LangOpts.ShortEnums) | ||||||
18278 | Packed = true; | ||||||
18279 | |||||||
18280 | // If the enum already has a type because it is fixed or dictated by the | ||||||
18281 | // target, promote that type instead of analyzing the enumerators. | ||||||
18282 | if (Enum->isComplete()) { | ||||||
18283 | BestType = Enum->getIntegerType(); | ||||||
18284 | if (BestType->isPromotableIntegerType()) | ||||||
18285 | BestPromotionType = Context.getPromotedIntegerType(BestType); | ||||||
18286 | else | ||||||
18287 | BestPromotionType = BestType; | ||||||
18288 | |||||||
18289 | BestWidth = Context.getIntWidth(BestType); | ||||||
18290 | } | ||||||
18291 | else if (NumNegativeBits) { | ||||||
18292 | // If there is a negative value, figure out the smallest integer type (of | ||||||
18293 | // int/long/longlong) that fits. | ||||||
18294 | // If it's packed, check also if it fits a char or a short. | ||||||
18295 | if (Packed && NumNegativeBits <= CharWidth && NumPositiveBits < CharWidth) { | ||||||
18296 | BestType = Context.SignedCharTy; | ||||||
18297 | BestWidth = CharWidth; | ||||||
18298 | } else if (Packed && NumNegativeBits <= ShortWidth && | ||||||
18299 | NumPositiveBits < ShortWidth) { | ||||||
18300 | BestType = Context.ShortTy; | ||||||
18301 | BestWidth = ShortWidth; | ||||||
18302 | } else if (NumNegativeBits <= IntWidth && NumPositiveBits < IntWidth) { | ||||||
18303 | BestType = Context.IntTy; | ||||||
18304 | BestWidth = IntWidth; | ||||||
18305 | } else { | ||||||
18306 | BestWidth = Context.getTargetInfo().getLongWidth(); | ||||||
18307 | |||||||
18308 | if (NumNegativeBits <= BestWidth && NumPositiveBits < BestWidth) { | ||||||
18309 | BestType = Context.LongTy; | ||||||
18310 | } else { | ||||||
18311 | BestWidth = Context.getTargetInfo().getLongLongWidth(); | ||||||
18312 | |||||||
18313 | if (NumNegativeBits > BestWidth || NumPositiveBits >= BestWidth) | ||||||
18314 | Diag(Enum->getLocation(), diag::ext_enum_too_large); | ||||||
18315 | BestType = Context.LongLongTy; | ||||||
18316 | } | ||||||
18317 | } | ||||||
18318 | BestPromotionType = (BestWidth <= IntWidth ? Context.IntTy : BestType); | ||||||
18319 | } else { | ||||||
18320 | // If there is no negative value, figure out the smallest type that fits | ||||||
18321 | // all of the enumerator values. | ||||||
18322 | // If it's packed, check also if it fits a char or a short. | ||||||
18323 | if (Packed && NumPositiveBits <= CharWidth) { | ||||||
18324 | BestType = Context.UnsignedCharTy; | ||||||
18325 | BestPromotionType = Context.IntTy; | ||||||
18326 | BestWidth = CharWidth; | ||||||
18327 | } else if (Packed && NumPositiveBits <= ShortWidth) { | ||||||
18328 | BestType = Context.UnsignedShortTy; | ||||||
18329 | BestPromotionType = Context.IntTy; | ||||||
18330 | BestWidth = ShortWidth; | ||||||
18331 | } else if (NumPositiveBits <= IntWidth) { | ||||||
18332 | BestType = Context.UnsignedIntTy; | ||||||
18333 | BestWidth = IntWidth; | ||||||
18334 | BestPromotionType | ||||||
18335 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
18336 | ? Context.UnsignedIntTy : Context.IntTy; | ||||||
18337 | } else if (NumPositiveBits <= | ||||||
18338 | (BestWidth = Context.getTargetInfo().getLongWidth())) { | ||||||
18339 | BestType = Context.UnsignedLongTy; | ||||||
18340 | BestPromotionType | ||||||
18341 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
18342 | ? Context.UnsignedLongTy : Context.LongTy; | ||||||
18343 | } else { | ||||||
18344 | BestWidth = Context.getTargetInfo().getLongLongWidth(); | ||||||
18345 | assert(NumPositiveBits <= BestWidth &&(static_cast <bool> (NumPositiveBits <= BestWidth && "How could an initializer get larger than ULL?") ? void (0) : __assert_fail ("NumPositiveBits <= BestWidth && \"How could an initializer get larger than ULL?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 18346, __extension__ __PRETTY_FUNCTION__)) | ||||||
18346 | "How could an initializer get larger than ULL?")(static_cast <bool> (NumPositiveBits <= BestWidth && "How could an initializer get larger than ULL?") ? void (0) : __assert_fail ("NumPositiveBits <= BestWidth && \"How could an initializer get larger than ULL?\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 18346, __extension__ __PRETTY_FUNCTION__)); | ||||||
18347 | BestType = Context.UnsignedLongLongTy; | ||||||
18348 | BestPromotionType | ||||||
18349 | = (NumPositiveBits == BestWidth || !getLangOpts().CPlusPlus) | ||||||
18350 | ? Context.UnsignedLongLongTy : Context.LongLongTy; | ||||||
18351 | } | ||||||
18352 | } | ||||||
18353 | |||||||
18354 | // Loop over all of the enumerator constants, changing their types to match | ||||||
18355 | // the type of the enum if needed. | ||||||
18356 | for (auto *D : Elements) { | ||||||
18357 | auto *ECD = cast_or_null<EnumConstantDecl>(D); | ||||||
18358 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
18359 | |||||||
18360 | // Standard C says the enumerators have int type, but we allow, as an | ||||||
18361 | // extension, the enumerators to be larger than int size. If each | ||||||
18362 | // enumerator value fits in an int, type it as an int, otherwise type it the | ||||||
18363 | // same as the enumerator decl itself. This means that in "enum { X = 1U }" | ||||||
18364 | // that X has type 'int', not 'unsigned'. | ||||||
18365 | |||||||
18366 | // Determine whether the value fits into an int. | ||||||
18367 | llvm::APSInt InitVal = ECD->getInitVal(); | ||||||
18368 | |||||||
18369 | // If it fits into an integer type, force it. Otherwise force it to match | ||||||
18370 | // the enum decl type. | ||||||
18371 | QualType NewTy; | ||||||
18372 | unsigned NewWidth; | ||||||
18373 | bool NewSign; | ||||||
18374 | if (!getLangOpts().CPlusPlus && | ||||||
18375 | !Enum->isFixed() && | ||||||
18376 | isRepresentableIntegerValue(Context, InitVal, Context.IntTy)) { | ||||||
18377 | NewTy = Context.IntTy; | ||||||
18378 | NewWidth = IntWidth; | ||||||
18379 | NewSign = true; | ||||||
18380 | } else if (ECD->getType() == BestType) { | ||||||
18381 | // Already the right type! | ||||||
18382 | if (getLangOpts().CPlusPlus) | ||||||
18383 | // C++ [dcl.enum]p4: Following the closing brace of an | ||||||
18384 | // enum-specifier, each enumerator has the type of its | ||||||
18385 | // enumeration. | ||||||
18386 | ECD->setType(EnumType); | ||||||
18387 | continue; | ||||||
18388 | } else { | ||||||
18389 | NewTy = BestType; | ||||||
18390 | NewWidth = BestWidth; | ||||||
18391 | NewSign = BestType->isSignedIntegerOrEnumerationType(); | ||||||
18392 | } | ||||||
18393 | |||||||
18394 | // Adjust the APSInt value. | ||||||
18395 | InitVal = InitVal.extOrTrunc(NewWidth); | ||||||
18396 | InitVal.setIsSigned(NewSign); | ||||||
18397 | ECD->setInitVal(InitVal); | ||||||
18398 | |||||||
18399 | // Adjust the Expr initializer and type. | ||||||
18400 | if (ECD->getInitExpr() && | ||||||
18401 | !Context.hasSameType(NewTy, ECD->getInitExpr()->getType())) | ||||||
18402 | ECD->setInitExpr(ImplicitCastExpr::Create( | ||||||
18403 | Context, NewTy, CK_IntegralCast, ECD->getInitExpr(), | ||||||
18404 | /*base paths*/ nullptr, VK_PRValue, FPOptionsOverride())); | ||||||
18405 | if (getLangOpts().CPlusPlus) | ||||||
18406 | // C++ [dcl.enum]p4: Following the closing brace of an | ||||||
18407 | // enum-specifier, each enumerator has the type of its | ||||||
18408 | // enumeration. | ||||||
18409 | ECD->setType(EnumType); | ||||||
18410 | else | ||||||
18411 | ECD->setType(NewTy); | ||||||
18412 | } | ||||||
18413 | |||||||
18414 | Enum->completeDefinition(BestType, BestPromotionType, | ||||||
18415 | NumPositiveBits, NumNegativeBits); | ||||||
18416 | |||||||
18417 | CheckForDuplicateEnumValues(*this, Elements, Enum, EnumType); | ||||||
18418 | |||||||
18419 | if (Enum->isClosedFlag()) { | ||||||
18420 | for (Decl *D : Elements) { | ||||||
18421 | EnumConstantDecl *ECD = cast_or_null<EnumConstantDecl>(D); | ||||||
18422 | if (!ECD) continue; // Already issued a diagnostic. | ||||||
18423 | |||||||
18424 | llvm::APSInt InitVal = ECD->getInitVal(); | ||||||
18425 | if (InitVal != 0 && !InitVal.isPowerOf2() && | ||||||
18426 | !IsValueInFlagEnum(Enum, InitVal, true)) | ||||||
18427 | Diag(ECD->getLocation(), diag::warn_flag_enum_constant_out_of_range) | ||||||
18428 | << ECD << Enum; | ||||||
18429 | } | ||||||
18430 | } | ||||||
18431 | |||||||
18432 | // Now that the enum type is defined, ensure it's not been underaligned. | ||||||
18433 | if (Enum->hasAttrs()) | ||||||
18434 | CheckAlignasUnderalignment(Enum); | ||||||
18435 | } | ||||||
18436 | |||||||
18437 | Decl *Sema::ActOnFileScopeAsmDecl(Expr *expr, | ||||||
18438 | SourceLocation StartLoc, | ||||||
18439 | SourceLocation EndLoc) { | ||||||
18440 | StringLiteral *AsmString = cast<StringLiteral>(expr); | ||||||
18441 | |||||||
18442 | FileScopeAsmDecl *New = FileScopeAsmDecl::Create(Context, CurContext, | ||||||
18443 | AsmString, StartLoc, | ||||||
18444 | EndLoc); | ||||||
18445 | CurContext->addDecl(New); | ||||||
18446 | return New; | ||||||
18447 | } | ||||||
18448 | |||||||
18449 | void Sema::ActOnPragmaRedefineExtname(IdentifierInfo* Name, | ||||||
18450 | IdentifierInfo* AliasName, | ||||||
18451 | SourceLocation PragmaLoc, | ||||||
18452 | SourceLocation NameLoc, | ||||||
18453 | SourceLocation AliasNameLoc) { | ||||||
18454 | NamedDecl *PrevDecl = LookupSingleName(TUScope, Name, NameLoc, | ||||||
18455 | LookupOrdinaryName); | ||||||
18456 | AttributeCommonInfo Info(AliasName, SourceRange(AliasNameLoc), | ||||||
18457 | AttributeCommonInfo::AS_Pragma); | ||||||
18458 | AsmLabelAttr *Attr = AsmLabelAttr::CreateImplicit( | ||||||
18459 | Context, AliasName->getName(), /*LiteralLabel=*/true, Info); | ||||||
18460 | |||||||
18461 | // If a declaration that: | ||||||
18462 | // 1) declares a function or a variable | ||||||
18463 | // 2) has external linkage | ||||||
18464 | // already exists, add a label attribute to it. | ||||||
18465 | if (PrevDecl && (isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl))) { | ||||||
18466 | if (isDeclExternC(PrevDecl)) | ||||||
18467 | PrevDecl->addAttr(Attr); | ||||||
18468 | else | ||||||
18469 | Diag(PrevDecl->getLocation(), diag::warn_redefine_extname_not_applied) | ||||||
18470 | << /*Variable*/(isa<FunctionDecl>(PrevDecl) ? 0 : 1) << PrevDecl; | ||||||
18471 | // Otherwise, add a label atttibute to ExtnameUndeclaredIdentifiers. | ||||||
18472 | } else | ||||||
18473 | (void)ExtnameUndeclaredIdentifiers.insert(std::make_pair(Name, Attr)); | ||||||
18474 | } | ||||||
18475 | |||||||
18476 | void Sema::ActOnPragmaWeakID(IdentifierInfo* Name, | ||||||
18477 | SourceLocation PragmaLoc, | ||||||
18478 | SourceLocation NameLoc) { | ||||||
18479 | Decl *PrevDecl = LookupSingleName(TUScope, Name, NameLoc, LookupOrdinaryName); | ||||||
18480 | |||||||
18481 | if (PrevDecl) { | ||||||
18482 | PrevDecl->addAttr(WeakAttr::CreateImplicit(Context, PragmaLoc, AttributeCommonInfo::AS_Pragma)); | ||||||
18483 | } else { | ||||||
18484 | (void)WeakUndeclaredIdentifiers.insert( | ||||||
18485 | std::pair<IdentifierInfo*,WeakInfo> | ||||||
18486 | (Name, WeakInfo((IdentifierInfo*)nullptr, NameLoc))); | ||||||
18487 | } | ||||||
18488 | } | ||||||
18489 | |||||||
18490 | void Sema::ActOnPragmaWeakAlias(IdentifierInfo* Name, | ||||||
18491 | IdentifierInfo* AliasName, | ||||||
18492 | SourceLocation PragmaLoc, | ||||||
18493 | SourceLocation NameLoc, | ||||||
18494 | SourceLocation AliasNameLoc) { | ||||||
18495 | Decl *PrevDecl = LookupSingleName(TUScope, AliasName, AliasNameLoc, | ||||||
18496 | LookupOrdinaryName); | ||||||
18497 | WeakInfo W = WeakInfo(Name, NameLoc); | ||||||
18498 | |||||||
18499 | if (PrevDecl && (isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl))) { | ||||||
18500 | if (!PrevDecl->hasAttr<AliasAttr>()) | ||||||
18501 | if (NamedDecl *ND = dyn_cast<NamedDecl>(PrevDecl)) | ||||||
18502 | DeclApplyPragmaWeak(TUScope, ND, W); | ||||||
18503 | } else { | ||||||
18504 | (void)WeakUndeclaredIdentifiers.insert( | ||||||
18505 | std::pair<IdentifierInfo*,WeakInfo>(AliasName, W)); | ||||||
18506 | } | ||||||
18507 | } | ||||||
18508 | |||||||
18509 | Decl *Sema::getObjCDeclContext() const { | ||||||
18510 | return (dyn_cast_or_null<ObjCContainerDecl>(CurContext)); | ||||||
18511 | } | ||||||
18512 | |||||||
18513 | Sema::FunctionEmissionStatus Sema::getEmissionStatus(FunctionDecl *FD, | ||||||
18514 | bool Final) { | ||||||
18515 | assert(FD && "Expected non-null FunctionDecl")(static_cast <bool> (FD && "Expected non-null FunctionDecl" ) ? void (0) : __assert_fail ("FD && \"Expected non-null FunctionDecl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/lib/Sema/SemaDecl.cpp" , 18515, __extension__ __PRETTY_FUNCTION__)); | ||||||
18516 | |||||||
18517 | // SYCL functions can be template, so we check if they have appropriate | ||||||
18518 | // attribute prior to checking if it is a template. | ||||||
18519 | if (LangOpts.SYCLIsDevice && FD->hasAttr<SYCLKernelAttr>()) | ||||||
18520 | return FunctionEmissionStatus::Emitted; | ||||||
18521 | |||||||
18522 | // Templates are emitted when they're instantiated. | ||||||
18523 | if (FD->isDependentContext()) | ||||||
18524 | return FunctionEmissionStatus::TemplateDiscarded; | ||||||
18525 | |||||||
18526 | // Check whether this function is an externally visible definition. | ||||||
18527 | auto IsEmittedForExternalSymbol = [this, FD]() { | ||||||
18528 | // We have to check the GVA linkage of the function's *definition* -- if we | ||||||
18529 | // only have a declaration, we don't know whether or not the function will | ||||||
18530 | // be emitted, because (say) the definition could include "inline". | ||||||
18531 | FunctionDecl *Def = FD->getDefinition(); | ||||||
18532 | |||||||
18533 | return Def && !isDiscardableGVALinkage( | ||||||
18534 | getASTContext().GetGVALinkageForFunction(Def)); | ||||||
18535 | }; | ||||||
18536 | |||||||
18537 | if (LangOpts.OpenMPIsDevice) { | ||||||
18538 | // In OpenMP device mode we will not emit host only functions, or functions | ||||||
18539 | // we don't need due to their linkage. | ||||||
18540 | Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy = | ||||||
18541 | OMPDeclareTargetDeclAttr::getDeviceType(FD->getCanonicalDecl()); | ||||||
18542 | // DevTy may be changed later by | ||||||
18543 | // #pragma omp declare target to(*) device_type(*). | ||||||
18544 | // Therefore DevTy having no value does not imply host. The emission status | ||||||
18545 | // will be checked again at the end of compilation unit with Final = true. | ||||||
18546 | if (DevTy.hasValue()) | ||||||
18547 | if (*DevTy == OMPDeclareTargetDeclAttr::DT_Host) | ||||||
18548 | return FunctionEmissionStatus::OMPDiscarded; | ||||||
18549 | // If we have an explicit value for the device type, or we are in a target | ||||||
18550 | // declare context, we need to emit all extern and used symbols. | ||||||
18551 | if (isInOpenMPDeclareTargetContext() || DevTy.hasValue()) | ||||||
18552 | if (IsEmittedForExternalSymbol()) | ||||||
18553 | return FunctionEmissionStatus::Emitted; | ||||||
18554 | // Device mode only emits what it must, if it wasn't tagged yet and needed, | ||||||
18555 | // we'll omit it. | ||||||
18556 | if (Final) | ||||||
18557 | return FunctionEmissionStatus::OMPDiscarded; | ||||||
18558 | } else if (LangOpts.OpenMP > 45) { | ||||||
18559 | // In OpenMP host compilation prior to 5.0 everything was an emitted host | ||||||
18560 | // function. In 5.0, no_host was introduced which might cause a function to | ||||||
18561 | // be ommitted. | ||||||
18562 | Optional<OMPDeclareTargetDeclAttr::DevTypeTy> DevTy = | ||||||
18563 | OMPDeclareTargetDeclAttr::getDeviceType(FD->getCanonicalDecl()); | ||||||
18564 | if (DevTy.hasValue()) | ||||||
18565 | if (*DevTy == OMPDeclareTargetDeclAttr::DT_NoHost) | ||||||
18566 | return FunctionEmissionStatus::OMPDiscarded; | ||||||
18567 | } | ||||||
18568 | |||||||
18569 | if (Final && LangOpts.OpenMP && !LangOpts.CUDA) | ||||||
18570 | return FunctionEmissionStatus::Emitted; | ||||||
18571 | |||||||
18572 | if (LangOpts.CUDA) { | ||||||
18573 | // When compiling for device, host functions are never emitted. Similarly, | ||||||
18574 | // when compiling for host, device and global functions are never emitted. | ||||||
18575 | // (Technically, we do emit a host-side stub for global functions, but this | ||||||
18576 | // doesn't count for our purposes here.) | ||||||
18577 | Sema::CUDAFunctionTarget T = IdentifyCUDATarget(FD); | ||||||
18578 | if (LangOpts.CUDAIsDevice && T == Sema::CFT_Host) | ||||||
18579 | return FunctionEmissionStatus::CUDADiscarded; | ||||||
18580 | if (!LangOpts.CUDAIsDevice && | ||||||
18581 | (T == Sema::CFT_Device || T == Sema::CFT_Global)) | ||||||
18582 | return FunctionEmissionStatus::CUDADiscarded; | ||||||
18583 | |||||||
18584 | if (IsEmittedForExternalSymbol()) | ||||||
18585 | return FunctionEmissionStatus::Emitted; | ||||||
18586 | } | ||||||
18587 | |||||||
18588 | // Otherwise, the function is known-emitted if it's in our set of | ||||||
18589 | // known-emitted functions. | ||||||
18590 | return FunctionEmissionStatus::Unknown; | ||||||
18591 | } | ||||||
18592 | |||||||
18593 | bool Sema::shouldIgnoreInHostDeviceCheck(FunctionDecl *Callee) { | ||||||
18594 | // Host-side references to a __global__ function refer to the stub, so the | ||||||
18595 | // function itself is never emitted and therefore should not be marked. | ||||||
18596 | // If we have host fn calls kernel fn calls host+device, the HD function | ||||||
18597 | // does not get instantiated on the host. We model this by omitting at the | ||||||
18598 | // call to the kernel from the callgraph. This ensures that, when compiling | ||||||
18599 | // for host, only HD functions actually called from the host get marked as | ||||||
18600 | // known-emitted. | ||||||
18601 | return LangOpts.CUDA && !LangOpts.CUDAIsDevice && | ||||||
18602 | IdentifyCUDATarget(Callee) == CFT_Global; | ||||||
18603 | } |
1 | //===--- DeclSpec.h - Parsed declaration specifiers -------------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | /// |
9 | /// \file |
10 | /// This file defines the classes used to store parsed information about |
11 | /// declaration-specifiers and declarators. |
12 | /// |
13 | /// \verbatim |
14 | /// static const int volatile x, *y, *(*(*z)[10])(const void *x); |
15 | /// ------------------------- - -- --------------------------- |
16 | /// declaration-specifiers \ | / |
17 | /// declarators |
18 | /// \endverbatim |
19 | /// |
20 | //===----------------------------------------------------------------------===// |
21 | |
22 | #ifndef LLVM_CLANG_SEMA_DECLSPEC_H |
23 | #define LLVM_CLANG_SEMA_DECLSPEC_H |
24 | |
25 | #include "clang/AST/DeclCXX.h" |
26 | #include "clang/AST/DeclObjCCommon.h" |
27 | #include "clang/AST/NestedNameSpecifier.h" |
28 | #include "clang/Basic/ExceptionSpecificationType.h" |
29 | #include "clang/Basic/Lambda.h" |
30 | #include "clang/Basic/OperatorKinds.h" |
31 | #include "clang/Basic/Specifiers.h" |
32 | #include "clang/Lex/Token.h" |
33 | #include "clang/Sema/Ownership.h" |
34 | #include "clang/Sema/ParsedAttr.h" |
35 | #include "llvm/ADT/SmallVector.h" |
36 | #include "llvm/Support/Compiler.h" |
37 | #include "llvm/Support/ErrorHandling.h" |
38 | |
39 | namespace clang { |
40 | class ASTContext; |
41 | class CXXRecordDecl; |
42 | class TypeLoc; |
43 | class LangOptions; |
44 | class IdentifierInfo; |
45 | class NamespaceAliasDecl; |
46 | class NamespaceDecl; |
47 | class ObjCDeclSpec; |
48 | class Sema; |
49 | class Declarator; |
50 | struct TemplateIdAnnotation; |
51 | |
52 | /// Represents a C++ nested-name-specifier or a global scope specifier. |
53 | /// |
54 | /// These can be in 3 states: |
55 | /// 1) Not present, identified by isEmpty() |
56 | /// 2) Present, identified by isNotEmpty() |
57 | /// 2.a) Valid, identified by isValid() |
58 | /// 2.b) Invalid, identified by isInvalid(). |
59 | /// |
60 | /// isSet() is deprecated because it mostly corresponded to "valid" but was |
61 | /// often used as if it meant "present". |
62 | /// |
63 | /// The actual scope is described by getScopeRep(). |
64 | class CXXScopeSpec { |
65 | SourceRange Range; |
66 | NestedNameSpecifierLocBuilder Builder; |
67 | |
68 | public: |
69 | SourceRange getRange() const { return Range; } |
70 | void setRange(SourceRange R) { Range = R; } |
71 | void setBeginLoc(SourceLocation Loc) { Range.setBegin(Loc); } |
72 | void setEndLoc(SourceLocation Loc) { Range.setEnd(Loc); } |
73 | SourceLocation getBeginLoc() const { return Range.getBegin(); } |
74 | SourceLocation getEndLoc() const { return Range.getEnd(); } |
75 | |
76 | /// Retrieve the representation of the nested-name-specifier. |
77 | NestedNameSpecifier *getScopeRep() const { |
78 | return Builder.getRepresentation(); |
79 | } |
80 | |
81 | /// Extend the current nested-name-specifier by another |
82 | /// nested-name-specifier component of the form 'type::'. |
83 | /// |
84 | /// \param Context The AST context in which this nested-name-specifier |
85 | /// resides. |
86 | /// |
87 | /// \param TemplateKWLoc The location of the 'template' keyword, if present. |
88 | /// |
89 | /// \param TL The TypeLoc that describes the type preceding the '::'. |
90 | /// |
91 | /// \param ColonColonLoc The location of the trailing '::'. |
92 | void Extend(ASTContext &Context, SourceLocation TemplateKWLoc, TypeLoc TL, |
93 | SourceLocation ColonColonLoc); |
94 | |
95 | /// Extend the current nested-name-specifier by another |
96 | /// nested-name-specifier component of the form 'identifier::'. |
97 | /// |
98 | /// \param Context The AST context in which this nested-name-specifier |
99 | /// resides. |
100 | /// |
101 | /// \param Identifier The identifier. |
102 | /// |
103 | /// \param IdentifierLoc The location of the identifier. |
104 | /// |
105 | /// \param ColonColonLoc The location of the trailing '::'. |
106 | void Extend(ASTContext &Context, IdentifierInfo *Identifier, |
107 | SourceLocation IdentifierLoc, SourceLocation ColonColonLoc); |
108 | |
109 | /// Extend the current nested-name-specifier by another |
110 | /// nested-name-specifier component of the form 'namespace::'. |
111 | /// |
112 | /// \param Context The AST context in which this nested-name-specifier |
113 | /// resides. |
114 | /// |
115 | /// \param Namespace The namespace. |
116 | /// |
117 | /// \param NamespaceLoc The location of the namespace name. |
118 | /// |
119 | /// \param ColonColonLoc The location of the trailing '::'. |
120 | void Extend(ASTContext &Context, NamespaceDecl *Namespace, |
121 | SourceLocation NamespaceLoc, SourceLocation ColonColonLoc); |
122 | |
123 | /// Extend the current nested-name-specifier by another |
124 | /// nested-name-specifier component of the form 'namespace-alias::'. |
125 | /// |
126 | /// \param Context The AST context in which this nested-name-specifier |
127 | /// resides. |
128 | /// |
129 | /// \param Alias The namespace alias. |
130 | /// |
131 | /// \param AliasLoc The location of the namespace alias |
132 | /// name. |
133 | /// |
134 | /// \param ColonColonLoc The location of the trailing '::'. |
135 | void Extend(ASTContext &Context, NamespaceAliasDecl *Alias, |
136 | SourceLocation AliasLoc, SourceLocation ColonColonLoc); |
137 | |
138 | /// Turn this (empty) nested-name-specifier into the global |
139 | /// nested-name-specifier '::'. |
140 | void MakeGlobal(ASTContext &Context, SourceLocation ColonColonLoc); |
141 | |
142 | /// Turns this (empty) nested-name-specifier into '__super' |
143 | /// nested-name-specifier. |
144 | /// |
145 | /// \param Context The AST context in which this nested-name-specifier |
146 | /// resides. |
147 | /// |
148 | /// \param RD The declaration of the class in which nested-name-specifier |
149 | /// appeared. |
150 | /// |
151 | /// \param SuperLoc The location of the '__super' keyword. |
152 | /// name. |
153 | /// |
154 | /// \param ColonColonLoc The location of the trailing '::'. |
155 | void MakeSuper(ASTContext &Context, CXXRecordDecl *RD, |
156 | SourceLocation SuperLoc, SourceLocation ColonColonLoc); |
157 | |
158 | /// Make a new nested-name-specifier from incomplete source-location |
159 | /// information. |
160 | /// |
161 | /// FIXME: This routine should be used very, very rarely, in cases where we |
162 | /// need to synthesize a nested-name-specifier. Most code should instead use |
163 | /// \c Adopt() with a proper \c NestedNameSpecifierLoc. |
164 | void MakeTrivial(ASTContext &Context, NestedNameSpecifier *Qualifier, |
165 | SourceRange R); |
166 | |
167 | /// Adopt an existing nested-name-specifier (with source-range |
168 | /// information). |
169 | void Adopt(NestedNameSpecifierLoc Other); |
170 | |
171 | /// Retrieve a nested-name-specifier with location information, copied |
172 | /// into the given AST context. |
173 | /// |
174 | /// \param Context The context into which this nested-name-specifier will be |
175 | /// copied. |
176 | NestedNameSpecifierLoc getWithLocInContext(ASTContext &Context) const; |
177 | |
178 | /// Retrieve the location of the name in the last qualifier |
179 | /// in this nested name specifier. |
180 | /// |
181 | /// For example, the location of \c bar |
182 | /// in |
183 | /// \verbatim |
184 | /// \::foo::bar<0>:: |
185 | /// ^~~ |
186 | /// \endverbatim |
187 | SourceLocation getLastQualifierNameLoc() const; |
188 | |
189 | /// No scope specifier. |
190 | bool isEmpty() const { return Range.isInvalid() && getScopeRep() == nullptr; } |
191 | /// A scope specifier is present, but may be valid or invalid. |
192 | bool isNotEmpty() const { return !isEmpty(); } |
193 | |
194 | /// An error occurred during parsing of the scope specifier. |
195 | bool isInvalid() const { return Range.isValid() && getScopeRep() == nullptr; } |
196 | /// A scope specifier is present, and it refers to a real scope. |
197 | bool isValid() const { return getScopeRep() != nullptr; } |
198 | |
199 | /// Indicate that this nested-name-specifier is invalid. |
200 | void SetInvalid(SourceRange R) { |
201 | assert(R.isValid() && "Must have a valid source range")(static_cast <bool> (R.isValid() && "Must have a valid source range" ) ? void (0) : __assert_fail ("R.isValid() && \"Must have a valid source range\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 201, __extension__ __PRETTY_FUNCTION__)); |
202 | if (Range.getBegin().isInvalid()) |
203 | Range.setBegin(R.getBegin()); |
204 | Range.setEnd(R.getEnd()); |
205 | Builder.Clear(); |
206 | } |
207 | |
208 | /// Deprecated. Some call sites intend isNotEmpty() while others intend |
209 | /// isValid(). |
210 | bool isSet() const { return getScopeRep() != nullptr; } |
211 | |
212 | void clear() { |
213 | Range = SourceRange(); |
214 | Builder.Clear(); |
215 | } |
216 | |
217 | /// Retrieve the data associated with the source-location information. |
218 | char *location_data() const { return Builder.getBuffer().first; } |
219 | |
220 | /// Retrieve the size of the data associated with source-location |
221 | /// information. |
222 | unsigned location_size() const { return Builder.getBuffer().second; } |
223 | }; |
224 | |
225 | /// Captures information about "declaration specifiers". |
226 | /// |
227 | /// "Declaration specifiers" encompasses storage-class-specifiers, |
228 | /// type-specifiers, type-qualifiers, and function-specifiers. |
229 | class DeclSpec { |
230 | public: |
231 | /// storage-class-specifier |
232 | /// \note The order of these enumerators is important for diagnostics. |
233 | enum SCS { |
234 | SCS_unspecified = 0, |
235 | SCS_typedef, |
236 | SCS_extern, |
237 | SCS_static, |
238 | SCS_auto, |
239 | SCS_register, |
240 | SCS_private_extern, |
241 | SCS_mutable |
242 | }; |
243 | |
244 | // Import thread storage class specifier enumeration and constants. |
245 | // These can be combined with SCS_extern and SCS_static. |
246 | typedef ThreadStorageClassSpecifier TSCS; |
247 | static const TSCS TSCS_unspecified = clang::TSCS_unspecified; |
248 | static const TSCS TSCS___thread = clang::TSCS___thread; |
249 | static const TSCS TSCS_thread_local = clang::TSCS_thread_local; |
250 | static const TSCS TSCS__Thread_local = clang::TSCS__Thread_local; |
251 | |
252 | enum TSC { |
253 | TSC_unspecified, |
254 | TSC_imaginary, |
255 | TSC_complex |
256 | }; |
257 | |
258 | // Import type specifier type enumeration and constants. |
259 | typedef TypeSpecifierType TST; |
260 | static const TST TST_unspecified = clang::TST_unspecified; |
261 | static const TST TST_void = clang::TST_void; |
262 | static const TST TST_char = clang::TST_char; |
263 | static const TST TST_wchar = clang::TST_wchar; |
264 | static const TST TST_char8 = clang::TST_char8; |
265 | static const TST TST_char16 = clang::TST_char16; |
266 | static const TST TST_char32 = clang::TST_char32; |
267 | static const TST TST_int = clang::TST_int; |
268 | static const TST TST_int128 = clang::TST_int128; |
269 | static const TST TST_extint = clang::TST_extint; |
270 | static const TST TST_half = clang::TST_half; |
271 | static const TST TST_BFloat16 = clang::TST_BFloat16; |
272 | static const TST TST_float = clang::TST_float; |
273 | static const TST TST_double = clang::TST_double; |
274 | static const TST TST_float16 = clang::TST_Float16; |
275 | static const TST TST_accum = clang::TST_Accum; |
276 | static const TST TST_fract = clang::TST_Fract; |
277 | static const TST TST_float128 = clang::TST_float128; |
278 | static const TST TST_bool = clang::TST_bool; |
279 | static const TST TST_decimal32 = clang::TST_decimal32; |
280 | static const TST TST_decimal64 = clang::TST_decimal64; |
281 | static const TST TST_decimal128 = clang::TST_decimal128; |
282 | static const TST TST_enum = clang::TST_enum; |
283 | static const TST TST_union = clang::TST_union; |
284 | static const TST TST_struct = clang::TST_struct; |
285 | static const TST TST_interface = clang::TST_interface; |
286 | static const TST TST_class = clang::TST_class; |
287 | static const TST TST_typename = clang::TST_typename; |
288 | static const TST TST_typeofType = clang::TST_typeofType; |
289 | static const TST TST_typeofExpr = clang::TST_typeofExpr; |
290 | static const TST TST_decltype = clang::TST_decltype; |
291 | static const TST TST_decltype_auto = clang::TST_decltype_auto; |
292 | static const TST TST_underlyingType = clang::TST_underlyingType; |
293 | static const TST TST_auto = clang::TST_auto; |
294 | static const TST TST_auto_type = clang::TST_auto_type; |
295 | static const TST TST_unknown_anytype = clang::TST_unknown_anytype; |
296 | static const TST TST_atomic = clang::TST_atomic; |
297 | #define GENERIC_IMAGE_TYPE(ImgType, Id) \ |
298 | static const TST TST_##ImgType##_t = clang::TST_##ImgType##_t; |
299 | #include "clang/Basic/OpenCLImageTypes.def" |
300 | static const TST TST_error = clang::TST_error; |
301 | |
302 | // type-qualifiers |
303 | enum TQ { // NOTE: These flags must be kept in sync with Qualifiers::TQ. |
304 | TQ_unspecified = 0, |
305 | TQ_const = 1, |
306 | TQ_restrict = 2, |
307 | TQ_volatile = 4, |
308 | TQ_unaligned = 8, |
309 | // This has no corresponding Qualifiers::TQ value, because it's not treated |
310 | // as a qualifier in our type system. |
311 | TQ_atomic = 16 |
312 | }; |
313 | |
314 | /// ParsedSpecifiers - Flags to query which specifiers were applied. This is |
315 | /// returned by getParsedSpecifiers. |
316 | enum ParsedSpecifiers { |
317 | PQ_None = 0, |
318 | PQ_StorageClassSpecifier = 1, |
319 | PQ_TypeSpecifier = 2, |
320 | PQ_TypeQualifier = 4, |
321 | PQ_FunctionSpecifier = 8 |
322 | // FIXME: Attributes should be included here. |
323 | }; |
324 | |
325 | private: |
326 | // storage-class-specifier |
327 | /*SCS*/unsigned StorageClassSpec : 3; |
328 | /*TSCS*/unsigned ThreadStorageClassSpec : 2; |
329 | unsigned SCS_extern_in_linkage_spec : 1; |
330 | |
331 | // type-specifier |
332 | /*TypeSpecifierWidth*/ unsigned TypeSpecWidth : 2; |
333 | /*TSC*/unsigned TypeSpecComplex : 2; |
334 | /*TSS*/unsigned TypeSpecSign : 2; |
335 | /*TST*/unsigned TypeSpecType : 6; |
336 | unsigned TypeAltiVecVector : 1; |
337 | unsigned TypeAltiVecPixel : 1; |
338 | unsigned TypeAltiVecBool : 1; |
339 | unsigned TypeSpecOwned : 1; |
340 | unsigned TypeSpecPipe : 1; |
341 | unsigned TypeSpecSat : 1; |
342 | unsigned ConstrainedAuto : 1; |
343 | |
344 | // type-qualifiers |
345 | unsigned TypeQualifiers : 5; // Bitwise OR of TQ. |
346 | |
347 | // function-specifier |
348 | unsigned FS_inline_specified : 1; |
349 | unsigned FS_forceinline_specified: 1; |
350 | unsigned FS_virtual_specified : 1; |
351 | unsigned FS_noreturn_specified : 1; |
352 | |
353 | // friend-specifier |
354 | unsigned Friend_specified : 1; |
355 | |
356 | // constexpr-specifier |
357 | unsigned ConstexprSpecifier : 2; |
358 | |
359 | union { |
360 | UnionParsedType TypeRep; |
361 | Decl *DeclRep; |
362 | Expr *ExprRep; |
363 | TemplateIdAnnotation *TemplateIdRep; |
364 | }; |
365 | |
366 | /// ExplicitSpecifier - Store information about explicit spicifer. |
367 | ExplicitSpecifier FS_explicit_specifier; |
368 | |
369 | // attributes. |
370 | ParsedAttributes Attrs; |
371 | |
372 | // Scope specifier for the type spec, if applicable. |
373 | CXXScopeSpec TypeScope; |
374 | |
375 | // SourceLocation info. These are null if the item wasn't specified or if |
376 | // the setting was synthesized. |
377 | SourceRange Range; |
378 | |
379 | SourceLocation StorageClassSpecLoc, ThreadStorageClassSpecLoc; |
380 | SourceRange TSWRange; |
381 | SourceLocation TSCLoc, TSSLoc, TSTLoc, AltiVecLoc, TSSatLoc; |
382 | /// TSTNameLoc - If TypeSpecType is any of class, enum, struct, union, |
383 | /// typename, then this is the location of the named type (if present); |
384 | /// otherwise, it is the same as TSTLoc. Hence, the pair TSTLoc and |
385 | /// TSTNameLoc provides source range info for tag types. |
386 | SourceLocation TSTNameLoc; |
387 | SourceRange TypeofParensRange; |
388 | SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc, TQ_atomicLoc, |
389 | TQ_unalignedLoc; |
390 | SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc, FS_noreturnLoc; |
391 | SourceLocation FS_explicitCloseParenLoc; |
392 | SourceLocation FS_forceinlineLoc; |
393 | SourceLocation FriendLoc, ModulePrivateLoc, ConstexprLoc; |
394 | SourceLocation TQ_pipeLoc; |
395 | |
396 | WrittenBuiltinSpecs writtenBS; |
397 | void SaveWrittenBuiltinSpecs(); |
398 | |
399 | ObjCDeclSpec *ObjCQualifiers; |
400 | |
401 | static bool isTypeRep(TST T) { |
402 | return (T == TST_typename || T == TST_typeofType || |
403 | T == TST_underlyingType || T == TST_atomic); |
404 | } |
405 | static bool isExprRep(TST T) { |
406 | return (T == TST_typeofExpr || T == TST_decltype || T == TST_extint); |
407 | } |
408 | static bool isTemplateIdRep(TST T) { |
409 | return (T == TST_auto || T == TST_decltype_auto); |
410 | } |
411 | |
412 | DeclSpec(const DeclSpec &) = delete; |
413 | void operator=(const DeclSpec &) = delete; |
414 | public: |
415 | static bool isDeclRep(TST T) { |
416 | return (T == TST_enum || T == TST_struct || |
417 | T == TST_interface || T == TST_union || |
418 | T == TST_class); |
419 | } |
420 | |
421 | DeclSpec(AttributeFactory &attrFactory) |
422 | : StorageClassSpec(SCS_unspecified), |
423 | ThreadStorageClassSpec(TSCS_unspecified), |
424 | SCS_extern_in_linkage_spec(false), |
425 | TypeSpecWidth(static_cast<unsigned>(TypeSpecifierWidth::Unspecified)), |
426 | TypeSpecComplex(TSC_unspecified), |
427 | TypeSpecSign(static_cast<unsigned>(TypeSpecifierSign::Unspecified)), |
428 | TypeSpecType(TST_unspecified), TypeAltiVecVector(false), |
429 | TypeAltiVecPixel(false), TypeAltiVecBool(false), TypeSpecOwned(false), |
430 | TypeSpecPipe(false), TypeSpecSat(false), ConstrainedAuto(false), |
431 | TypeQualifiers(TQ_unspecified), FS_inline_specified(false), |
432 | FS_forceinline_specified(false), FS_virtual_specified(false), |
433 | FS_noreturn_specified(false), Friend_specified(false), |
434 | ConstexprSpecifier( |
435 | static_cast<unsigned>(ConstexprSpecKind::Unspecified)), |
436 | FS_explicit_specifier(), Attrs(attrFactory), writtenBS(), |
437 | ObjCQualifiers(nullptr) {} |
438 | |
439 | // storage-class-specifier |
440 | SCS getStorageClassSpec() const { return (SCS)StorageClassSpec; } |
441 | TSCS getThreadStorageClassSpec() const { |
442 | return (TSCS)ThreadStorageClassSpec; |
443 | } |
444 | bool isExternInLinkageSpec() const { return SCS_extern_in_linkage_spec; } |
445 | void setExternInLinkageSpec(bool Value) { |
446 | SCS_extern_in_linkage_spec = Value; |
447 | } |
448 | |
449 | SourceLocation getStorageClassSpecLoc() const { return StorageClassSpecLoc; } |
450 | SourceLocation getThreadStorageClassSpecLoc() const { |
451 | return ThreadStorageClassSpecLoc; |
452 | } |
453 | |
454 | void ClearStorageClassSpecs() { |
455 | StorageClassSpec = DeclSpec::SCS_unspecified; |
456 | ThreadStorageClassSpec = DeclSpec::TSCS_unspecified; |
457 | SCS_extern_in_linkage_spec = false; |
458 | StorageClassSpecLoc = SourceLocation(); |
459 | ThreadStorageClassSpecLoc = SourceLocation(); |
460 | } |
461 | |
462 | void ClearTypeSpecType() { |
463 | TypeSpecType = DeclSpec::TST_unspecified; |
464 | TypeSpecOwned = false; |
465 | TSTLoc = SourceLocation(); |
466 | } |
467 | |
468 | // type-specifier |
469 | TypeSpecifierWidth getTypeSpecWidth() const { |
470 | return static_cast<TypeSpecifierWidth>(TypeSpecWidth); |
471 | } |
472 | TSC getTypeSpecComplex() const { return (TSC)TypeSpecComplex; } |
473 | TypeSpecifierSign getTypeSpecSign() const { |
474 | return static_cast<TypeSpecifierSign>(TypeSpecSign); |
475 | } |
476 | TST getTypeSpecType() const { return (TST)TypeSpecType; } |
477 | bool isTypeAltiVecVector() const { return TypeAltiVecVector; } |
478 | bool isTypeAltiVecPixel() const { return TypeAltiVecPixel; } |
479 | bool isTypeAltiVecBool() const { return TypeAltiVecBool; } |
480 | bool isTypeSpecOwned() const { return TypeSpecOwned; } |
481 | bool isTypeRep() const { return isTypeRep((TST) TypeSpecType); } |
482 | bool isTypeSpecPipe() const { return TypeSpecPipe; } |
483 | bool isTypeSpecSat() const { return TypeSpecSat; } |
484 | bool isConstrainedAuto() const { return ConstrainedAuto; } |
485 | |
486 | ParsedType getRepAsType() const { |
487 | assert(isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type")(static_cast <bool> (isTypeRep((TST) TypeSpecType) && "DeclSpec does not store a type") ? void (0) : __assert_fail ("isTypeRep((TST) TypeSpecType) && \"DeclSpec does not store a type\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 487, __extension__ __PRETTY_FUNCTION__)); |
488 | return TypeRep; |
489 | } |
490 | Decl *getRepAsDecl() const { |
491 | assert(isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl")(static_cast <bool> (isDeclRep((TST) TypeSpecType) && "DeclSpec does not store a decl") ? void (0) : __assert_fail ("isDeclRep((TST) TypeSpecType) && \"DeclSpec does not store a decl\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 491, __extension__ __PRETTY_FUNCTION__)); |
492 | return DeclRep; |
493 | } |
494 | Expr *getRepAsExpr() const { |
495 | assert(isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr")(static_cast <bool> (isExprRep((TST) TypeSpecType) && "DeclSpec does not store an expr") ? void (0) : __assert_fail ("isExprRep((TST) TypeSpecType) && \"DeclSpec does not store an expr\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 495, __extension__ __PRETTY_FUNCTION__)); |
496 | return ExprRep; |
497 | } |
498 | TemplateIdAnnotation *getRepAsTemplateId() const { |
499 | assert(isTemplateIdRep((TST) TypeSpecType) &&(static_cast <bool> (isTemplateIdRep((TST) TypeSpecType ) && "DeclSpec does not store a template id") ? void ( 0) : __assert_fail ("isTemplateIdRep((TST) TypeSpecType) && \"DeclSpec does not store a template id\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 500, __extension__ __PRETTY_FUNCTION__)) |
500 | "DeclSpec does not store a template id")(static_cast <bool> (isTemplateIdRep((TST) TypeSpecType ) && "DeclSpec does not store a template id") ? void ( 0) : __assert_fail ("isTemplateIdRep((TST) TypeSpecType) && \"DeclSpec does not store a template id\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 500, __extension__ __PRETTY_FUNCTION__)); |
501 | return TemplateIdRep; |
502 | } |
503 | CXXScopeSpec &getTypeSpecScope() { return TypeScope; } |
504 | const CXXScopeSpec &getTypeSpecScope() const { return TypeScope; } |
505 | |
506 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
507 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
508 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
509 | |
510 | SourceLocation getTypeSpecWidthLoc() const { return TSWRange.getBegin(); } |
511 | SourceRange getTypeSpecWidthRange() const { return TSWRange; } |
512 | SourceLocation getTypeSpecComplexLoc() const { return TSCLoc; } |
513 | SourceLocation getTypeSpecSignLoc() const { return TSSLoc; } |
514 | SourceLocation getTypeSpecTypeLoc() const { return TSTLoc; } |
515 | SourceLocation getAltiVecLoc() const { return AltiVecLoc; } |
516 | SourceLocation getTypeSpecSatLoc() const { return TSSatLoc; } |
517 | |
518 | SourceLocation getTypeSpecTypeNameLoc() const { |
519 | assert(isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename)(static_cast <bool> (isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename) ? void (0) : __assert_fail ("isDeclRep((TST) TypeSpecType) || TypeSpecType == TST_typename" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 519, __extension__ __PRETTY_FUNCTION__)); |
520 | return TSTNameLoc; |
521 | } |
522 | |
523 | SourceRange getTypeofParensRange() const { return TypeofParensRange; } |
524 | void setTypeofParensRange(SourceRange range) { TypeofParensRange = range; } |
525 | |
526 | bool hasAutoTypeSpec() const { |
527 | return (TypeSpecType == TST_auto || TypeSpecType == TST_auto_type || |
528 | TypeSpecType == TST_decltype_auto); |
529 | } |
530 | |
531 | bool hasTagDefinition() const; |
532 | |
533 | /// Turn a type-specifier-type into a string like "_Bool" or "union". |
534 | static const char *getSpecifierName(DeclSpec::TST T, |
535 | const PrintingPolicy &Policy); |
536 | static const char *getSpecifierName(DeclSpec::TQ Q); |
537 | static const char *getSpecifierName(TypeSpecifierSign S); |
538 | static const char *getSpecifierName(DeclSpec::TSC C); |
539 | static const char *getSpecifierName(TypeSpecifierWidth W); |
540 | static const char *getSpecifierName(DeclSpec::SCS S); |
541 | static const char *getSpecifierName(DeclSpec::TSCS S); |
542 | static const char *getSpecifierName(ConstexprSpecKind C); |
543 | |
544 | // type-qualifiers |
545 | |
546 | /// getTypeQualifiers - Return a set of TQs. |
547 | unsigned getTypeQualifiers() const { return TypeQualifiers; } |
548 | SourceLocation getConstSpecLoc() const { return TQ_constLoc; } |
549 | SourceLocation getRestrictSpecLoc() const { return TQ_restrictLoc; } |
550 | SourceLocation getVolatileSpecLoc() const { return TQ_volatileLoc; } |
551 | SourceLocation getAtomicSpecLoc() const { return TQ_atomicLoc; } |
552 | SourceLocation getUnalignedSpecLoc() const { return TQ_unalignedLoc; } |
553 | SourceLocation getPipeLoc() const { return TQ_pipeLoc; } |
554 | |
555 | /// Clear out all of the type qualifiers. |
556 | void ClearTypeQualifiers() { |
557 | TypeQualifiers = 0; |
558 | TQ_constLoc = SourceLocation(); |
559 | TQ_restrictLoc = SourceLocation(); |
560 | TQ_volatileLoc = SourceLocation(); |
561 | TQ_atomicLoc = SourceLocation(); |
562 | TQ_unalignedLoc = SourceLocation(); |
563 | TQ_pipeLoc = SourceLocation(); |
564 | } |
565 | |
566 | // function-specifier |
567 | bool isInlineSpecified() const { |
568 | return FS_inline_specified | FS_forceinline_specified; |
569 | } |
570 | SourceLocation getInlineSpecLoc() const { |
571 | return FS_inline_specified ? FS_inlineLoc : FS_forceinlineLoc; |
572 | } |
573 | |
574 | ExplicitSpecifier getExplicitSpecifier() const { |
575 | return FS_explicit_specifier; |
576 | } |
577 | |
578 | bool isVirtualSpecified() const { return FS_virtual_specified; } |
579 | SourceLocation getVirtualSpecLoc() const { return FS_virtualLoc; } |
580 | |
581 | bool hasExplicitSpecifier() const { |
582 | return FS_explicit_specifier.isSpecified(); |
583 | } |
584 | SourceLocation getExplicitSpecLoc() const { return FS_explicitLoc; } |
585 | SourceRange getExplicitSpecRange() const { |
586 | return FS_explicit_specifier.getExpr() |
587 | ? SourceRange(FS_explicitLoc, FS_explicitCloseParenLoc) |
588 | : SourceRange(FS_explicitLoc); |
589 | } |
590 | |
591 | bool isNoreturnSpecified() const { return FS_noreturn_specified; } |
592 | SourceLocation getNoreturnSpecLoc() const { return FS_noreturnLoc; } |
593 | |
594 | void ClearFunctionSpecs() { |
595 | FS_inline_specified = false; |
596 | FS_inlineLoc = SourceLocation(); |
597 | FS_forceinline_specified = false; |
598 | FS_forceinlineLoc = SourceLocation(); |
599 | FS_virtual_specified = false; |
600 | FS_virtualLoc = SourceLocation(); |
601 | FS_explicit_specifier = ExplicitSpecifier(); |
602 | FS_explicitLoc = SourceLocation(); |
603 | FS_explicitCloseParenLoc = SourceLocation(); |
604 | FS_noreturn_specified = false; |
605 | FS_noreturnLoc = SourceLocation(); |
606 | } |
607 | |
608 | /// This method calls the passed in handler on each CVRU qual being |
609 | /// set. |
610 | /// Handle - a handler to be invoked. |
611 | void forEachCVRUQualifier( |
612 | llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle); |
613 | |
614 | /// This method calls the passed in handler on each qual being |
615 | /// set. |
616 | /// Handle - a handler to be invoked. |
617 | void forEachQualifier( |
618 | llvm::function_ref<void(TQ, StringRef, SourceLocation)> Handle); |
619 | |
620 | /// Return true if any type-specifier has been found. |
621 | bool hasTypeSpecifier() const { |
622 | return getTypeSpecType() != DeclSpec::TST_unspecified || |
623 | getTypeSpecWidth() != TypeSpecifierWidth::Unspecified || |
624 | getTypeSpecComplex() != DeclSpec::TSC_unspecified || |
625 | getTypeSpecSign() != TypeSpecifierSign::Unspecified; |
626 | } |
627 | |
628 | /// Return a bitmask of which flavors of specifiers this |
629 | /// DeclSpec includes. |
630 | unsigned getParsedSpecifiers() const; |
631 | |
632 | /// isEmpty - Return true if this declaration specifier is completely empty: |
633 | /// no tokens were parsed in the production of it. |
634 | bool isEmpty() const { |
635 | return getParsedSpecifiers() == DeclSpec::PQ_None; |
636 | } |
637 | |
638 | void SetRangeStart(SourceLocation Loc) { Range.setBegin(Loc); } |
639 | void SetRangeEnd(SourceLocation Loc) { Range.setEnd(Loc); } |
640 | |
641 | /// These methods set the specified attribute of the DeclSpec and |
642 | /// return false if there was no error. If an error occurs (for |
643 | /// example, if we tried to set "auto" on a spec with "extern" |
644 | /// already set), they return true and set PrevSpec and DiagID |
645 | /// such that |
646 | /// Diag(Loc, DiagID) << PrevSpec; |
647 | /// will yield a useful result. |
648 | /// |
649 | /// TODO: use a more general approach that still allows these |
650 | /// diagnostics to be ignored when desired. |
651 | bool SetStorageClassSpec(Sema &S, SCS SC, SourceLocation Loc, |
652 | const char *&PrevSpec, unsigned &DiagID, |
653 | const PrintingPolicy &Policy); |
654 | bool SetStorageClassSpecThread(TSCS TSC, SourceLocation Loc, |
655 | const char *&PrevSpec, unsigned &DiagID); |
656 | bool SetTypeSpecWidth(TypeSpecifierWidth W, SourceLocation Loc, |
657 | const char *&PrevSpec, unsigned &DiagID, |
658 | const PrintingPolicy &Policy); |
659 | bool SetTypeSpecComplex(TSC C, SourceLocation Loc, const char *&PrevSpec, |
660 | unsigned &DiagID); |
661 | bool SetTypeSpecSign(TypeSpecifierSign S, SourceLocation Loc, |
662 | const char *&PrevSpec, unsigned &DiagID); |
663 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
664 | unsigned &DiagID, const PrintingPolicy &Policy); |
665 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
666 | unsigned &DiagID, ParsedType Rep, |
667 | const PrintingPolicy &Policy); |
668 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
669 | unsigned &DiagID, TypeResult Rep, |
670 | const PrintingPolicy &Policy) { |
671 | if (Rep.isInvalid()) |
672 | return SetTypeSpecError(); |
673 | return SetTypeSpecType(T, Loc, PrevSpec, DiagID, Rep.get(), Policy); |
674 | } |
675 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
676 | unsigned &DiagID, Decl *Rep, bool Owned, |
677 | const PrintingPolicy &Policy); |
678 | bool SetTypeSpecType(TST T, SourceLocation TagKwLoc, |
679 | SourceLocation TagNameLoc, const char *&PrevSpec, |
680 | unsigned &DiagID, ParsedType Rep, |
681 | const PrintingPolicy &Policy); |
682 | bool SetTypeSpecType(TST T, SourceLocation TagKwLoc, |
683 | SourceLocation TagNameLoc, const char *&PrevSpec, |
684 | unsigned &DiagID, Decl *Rep, bool Owned, |
685 | const PrintingPolicy &Policy); |
686 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
687 | unsigned &DiagID, TemplateIdAnnotation *Rep, |
688 | const PrintingPolicy &Policy); |
689 | |
690 | bool SetTypeSpecType(TST T, SourceLocation Loc, const char *&PrevSpec, |
691 | unsigned &DiagID, Expr *Rep, |
692 | const PrintingPolicy &policy); |
693 | bool SetTypeAltiVecVector(bool isAltiVecVector, SourceLocation Loc, |
694 | const char *&PrevSpec, unsigned &DiagID, |
695 | const PrintingPolicy &Policy); |
696 | bool SetTypeAltiVecPixel(bool isAltiVecPixel, SourceLocation Loc, |
697 | const char *&PrevSpec, unsigned &DiagID, |
698 | const PrintingPolicy &Policy); |
699 | bool SetTypeAltiVecBool(bool isAltiVecBool, SourceLocation Loc, |
700 | const char *&PrevSpec, unsigned &DiagID, |
701 | const PrintingPolicy &Policy); |
702 | bool SetTypePipe(bool isPipe, SourceLocation Loc, |
703 | const char *&PrevSpec, unsigned &DiagID, |
704 | const PrintingPolicy &Policy); |
705 | bool SetExtIntType(SourceLocation KWLoc, Expr *BitWidth, |
706 | const char *&PrevSpec, unsigned &DiagID, |
707 | const PrintingPolicy &Policy); |
708 | bool SetTypeSpecSat(SourceLocation Loc, const char *&PrevSpec, |
709 | unsigned &DiagID); |
710 | bool SetTypeSpecError(); |
711 | void UpdateDeclRep(Decl *Rep) { |
712 | assert(isDeclRep((TST) TypeSpecType))(static_cast <bool> (isDeclRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isDeclRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 712, __extension__ __PRETTY_FUNCTION__)); |
713 | DeclRep = Rep; |
714 | } |
715 | void UpdateTypeRep(ParsedType Rep) { |
716 | assert(isTypeRep((TST) TypeSpecType))(static_cast <bool> (isTypeRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isTypeRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 716, __extension__ __PRETTY_FUNCTION__)); |
717 | TypeRep = Rep; |
718 | } |
719 | void UpdateExprRep(Expr *Rep) { |
720 | assert(isExprRep((TST) TypeSpecType))(static_cast <bool> (isExprRep((TST) TypeSpecType)) ? void (0) : __assert_fail ("isExprRep((TST) TypeSpecType)", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 720, __extension__ __PRETTY_FUNCTION__)); |
721 | ExprRep = Rep; |
722 | } |
723 | |
724 | bool SetTypeQual(TQ T, SourceLocation Loc); |
725 | |
726 | bool SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec, |
727 | unsigned &DiagID, const LangOptions &Lang); |
728 | |
729 | bool setFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec, |
730 | unsigned &DiagID); |
731 | bool setFunctionSpecForceInline(SourceLocation Loc, const char *&PrevSpec, |
732 | unsigned &DiagID); |
733 | bool setFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec, |
734 | unsigned &DiagID); |
735 | bool setFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec, |
736 | unsigned &DiagID, ExplicitSpecifier ExplicitSpec, |
737 | SourceLocation CloseParenLoc); |
738 | bool setFunctionSpecNoreturn(SourceLocation Loc, const char *&PrevSpec, |
739 | unsigned &DiagID); |
740 | |
741 | bool SetFriendSpec(SourceLocation Loc, const char *&PrevSpec, |
742 | unsigned &DiagID); |
743 | bool setModulePrivateSpec(SourceLocation Loc, const char *&PrevSpec, |
744 | unsigned &DiagID); |
745 | bool SetConstexprSpec(ConstexprSpecKind ConstexprKind, SourceLocation Loc, |
746 | const char *&PrevSpec, unsigned &DiagID); |
747 | |
748 | bool isFriendSpecified() const { return Friend_specified; } |
749 | SourceLocation getFriendSpecLoc() const { return FriendLoc; } |
750 | |
751 | bool isModulePrivateSpecified() const { return ModulePrivateLoc.isValid(); } |
752 | SourceLocation getModulePrivateSpecLoc() const { return ModulePrivateLoc; } |
753 | |
754 | ConstexprSpecKind getConstexprSpecifier() const { |
755 | return ConstexprSpecKind(ConstexprSpecifier); |
756 | } |
757 | |
758 | SourceLocation getConstexprSpecLoc() const { return ConstexprLoc; } |
759 | bool hasConstexprSpecifier() const { |
760 | return getConstexprSpecifier() != ConstexprSpecKind::Unspecified; |
761 | } |
762 | |
763 | void ClearConstexprSpec() { |
764 | ConstexprSpecifier = static_cast<unsigned>(ConstexprSpecKind::Unspecified); |
765 | ConstexprLoc = SourceLocation(); |
766 | } |
767 | |
768 | AttributePool &getAttributePool() const { |
769 | return Attrs.getPool(); |
770 | } |
771 | |
772 | /// Concatenates two attribute lists. |
773 | /// |
774 | /// The GCC attribute syntax allows for the following: |
775 | /// |
776 | /// \code |
777 | /// short __attribute__(( unused, deprecated )) |
778 | /// int __attribute__(( may_alias, aligned(16) )) var; |
779 | /// \endcode |
780 | /// |
781 | /// This declares 4 attributes using 2 lists. The following syntax is |
782 | /// also allowed and equivalent to the previous declaration. |
783 | /// |
784 | /// \code |
785 | /// short __attribute__((unused)) __attribute__((deprecated)) |
786 | /// int __attribute__((may_alias)) __attribute__((aligned(16))) var; |
787 | /// \endcode |
788 | /// |
789 | void addAttributes(ParsedAttributesView &AL) { |
790 | Attrs.addAll(AL.begin(), AL.end()); |
791 | } |
792 | |
793 | bool hasAttributes() const { return !Attrs.empty(); } |
794 | |
795 | ParsedAttributes &getAttributes() { return Attrs; } |
796 | const ParsedAttributes &getAttributes() const { return Attrs; } |
797 | |
798 | void takeAttributesFrom(ParsedAttributes &attrs) { |
799 | Attrs.takeAllFrom(attrs); |
800 | } |
801 | |
802 | /// Finish - This does final analysis of the declspec, issuing diagnostics for |
803 | /// things like "_Imaginary" (lacking an FP type). After calling this method, |
804 | /// DeclSpec is guaranteed self-consistent, even if an error occurred. |
805 | void Finish(Sema &S, const PrintingPolicy &Policy); |
806 | |
807 | const WrittenBuiltinSpecs& getWrittenBuiltinSpecs() const { |
808 | return writtenBS; |
809 | } |
810 | |
811 | ObjCDeclSpec *getObjCQualifiers() const { return ObjCQualifiers; } |
812 | void setObjCQualifiers(ObjCDeclSpec *quals) { ObjCQualifiers = quals; } |
813 | |
814 | /// Checks if this DeclSpec can stand alone, without a Declarator. |
815 | /// |
816 | /// Only tag declspecs can stand alone. |
817 | bool isMissingDeclaratorOk(); |
818 | }; |
819 | |
820 | /// Captures information about "declaration specifiers" specific to |
821 | /// Objective-C. |
822 | class ObjCDeclSpec { |
823 | public: |
824 | /// ObjCDeclQualifier - Qualifier used on types in method |
825 | /// declarations. Not all combinations are sensible. Parameters |
826 | /// can be one of { in, out, inout } with one of { bycopy, byref }. |
827 | /// Returns can either be { oneway } or not. |
828 | /// |
829 | /// This should be kept in sync with Decl::ObjCDeclQualifier. |
830 | enum ObjCDeclQualifier { |
831 | DQ_None = 0x0, |
832 | DQ_In = 0x1, |
833 | DQ_Inout = 0x2, |
834 | DQ_Out = 0x4, |
835 | DQ_Bycopy = 0x8, |
836 | DQ_Byref = 0x10, |
837 | DQ_Oneway = 0x20, |
838 | DQ_CSNullability = 0x40 |
839 | }; |
840 | |
841 | ObjCDeclSpec() |
842 | : objcDeclQualifier(DQ_None), |
843 | PropertyAttributes(ObjCPropertyAttribute::kind_noattr), Nullability(0), |
844 | GetterName(nullptr), SetterName(nullptr) {} |
845 | |
846 | ObjCDeclQualifier getObjCDeclQualifier() const { |
847 | return (ObjCDeclQualifier)objcDeclQualifier; |
848 | } |
849 | void setObjCDeclQualifier(ObjCDeclQualifier DQVal) { |
850 | objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier | DQVal); |
851 | } |
852 | void clearObjCDeclQualifier(ObjCDeclQualifier DQVal) { |
853 | objcDeclQualifier = (ObjCDeclQualifier) (objcDeclQualifier & ~DQVal); |
854 | } |
855 | |
856 | ObjCPropertyAttribute::Kind getPropertyAttributes() const { |
857 | return ObjCPropertyAttribute::Kind(PropertyAttributes); |
858 | } |
859 | void setPropertyAttributes(ObjCPropertyAttribute::Kind PRVal) { |
860 | PropertyAttributes = |
861 | (ObjCPropertyAttribute::Kind)(PropertyAttributes | PRVal); |
862 | } |
863 | |
864 | NullabilityKind getNullability() const { |
865 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 868, __extension__ __PRETTY_FUNCTION__)) |
866 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 868, __extension__ __PRETTY_FUNCTION__)) |
867 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 868, __extension__ __PRETTY_FUNCTION__)) |
868 | "Objective-C declspec doesn't have nullability")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 868, __extension__ __PRETTY_FUNCTION__)); |
869 | return static_cast<NullabilityKind>(Nullability); |
870 | } |
871 | |
872 | SourceLocation getNullabilityLoc() const { |
873 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 876, __extension__ __PRETTY_FUNCTION__)) |
874 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 876, __extension__ __PRETTY_FUNCTION__)) |
875 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 876, __extension__ __PRETTY_FUNCTION__)) |
876 | "Objective-C declspec doesn't have nullability")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Objective-C declspec doesn't have nullability" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Objective-C declspec doesn't have nullability\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 876, __extension__ __PRETTY_FUNCTION__)); |
877 | return NullabilityLoc; |
878 | } |
879 | |
880 | void setNullability(SourceLocation loc, NullabilityKind kind) { |
881 | assert((static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 884, __extension__ __PRETTY_FUNCTION__)) |
882 | ((getObjCDeclQualifier() & DQ_CSNullability) ||(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 884, __extension__ __PRETTY_FUNCTION__)) |
883 | (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) &&(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 884, __extension__ __PRETTY_FUNCTION__)) |
884 | "Set the nullability declspec or property attribute first")(static_cast <bool> (((getObjCDeclQualifier() & DQ_CSNullability ) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability )) && "Set the nullability declspec or property attribute first" ) ? void (0) : __assert_fail ("((getObjCDeclQualifier() & DQ_CSNullability) || (getPropertyAttributes() & ObjCPropertyAttribute::kind_nullability)) && \"Set the nullability declspec or property attribute first\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 884, __extension__ __PRETTY_FUNCTION__)); |
885 | Nullability = static_cast<unsigned>(kind); |
886 | NullabilityLoc = loc; |
887 | } |
888 | |
889 | const IdentifierInfo *getGetterName() const { return GetterName; } |
890 | IdentifierInfo *getGetterName() { return GetterName; } |
891 | SourceLocation getGetterNameLoc() const { return GetterNameLoc; } |
892 | void setGetterName(IdentifierInfo *name, SourceLocation loc) { |
893 | GetterName = name; |
894 | GetterNameLoc = loc; |
895 | } |
896 | |
897 | const IdentifierInfo *getSetterName() const { return SetterName; } |
898 | IdentifierInfo *getSetterName() { return SetterName; } |
899 | SourceLocation getSetterNameLoc() const { return SetterNameLoc; } |
900 | void setSetterName(IdentifierInfo *name, SourceLocation loc) { |
901 | SetterName = name; |
902 | SetterNameLoc = loc; |
903 | } |
904 | |
905 | private: |
906 | // FIXME: These two are unrelated and mutually exclusive. So perhaps |
907 | // we can put them in a union to reflect their mutual exclusivity |
908 | // (space saving is negligible). |
909 | unsigned objcDeclQualifier : 7; |
910 | |
911 | // NOTE: VC++ treats enums as signed, avoid using ObjCPropertyAttribute::Kind |
912 | unsigned PropertyAttributes : NumObjCPropertyAttrsBits; |
913 | |
914 | unsigned Nullability : 2; |
915 | |
916 | SourceLocation NullabilityLoc; |
917 | |
918 | IdentifierInfo *GetterName; // getter name or NULL if no getter |
919 | IdentifierInfo *SetterName; // setter name or NULL if no setter |
920 | SourceLocation GetterNameLoc; // location of the getter attribute's value |
921 | SourceLocation SetterNameLoc; // location of the setter attribute's value |
922 | |
923 | }; |
924 | |
925 | /// Describes the kind of unqualified-id parsed. |
926 | enum class UnqualifiedIdKind { |
927 | /// An identifier. |
928 | IK_Identifier, |
929 | /// An overloaded operator name, e.g., operator+. |
930 | IK_OperatorFunctionId, |
931 | /// A conversion function name, e.g., operator int. |
932 | IK_ConversionFunctionId, |
933 | /// A user-defined literal name, e.g., operator "" _i. |
934 | IK_LiteralOperatorId, |
935 | /// A constructor name. |
936 | IK_ConstructorName, |
937 | /// A constructor named via a template-id. |
938 | IK_ConstructorTemplateId, |
939 | /// A destructor name. |
940 | IK_DestructorName, |
941 | /// A template-id, e.g., f<int>. |
942 | IK_TemplateId, |
943 | /// An implicit 'self' parameter |
944 | IK_ImplicitSelfParam, |
945 | /// A deduction-guide name (a template-name) |
946 | IK_DeductionGuideName |
947 | }; |
948 | |
949 | /// Represents a C++ unqualified-id that has been parsed. |
950 | class UnqualifiedId { |
951 | private: |
952 | UnqualifiedId(const UnqualifiedId &Other) = delete; |
953 | const UnqualifiedId &operator=(const UnqualifiedId &) = delete; |
954 | |
955 | public: |
956 | /// Describes the kind of unqualified-id parsed. |
957 | UnqualifiedIdKind Kind; |
958 | |
959 | struct OFI { |
960 | /// The kind of overloaded operator. |
961 | OverloadedOperatorKind Operator; |
962 | |
963 | /// The source locations of the individual tokens that name |
964 | /// the operator, e.g., the "new", "[", and "]" tokens in |
965 | /// operator new []. |
966 | /// |
967 | /// Different operators have different numbers of tokens in their name, |
968 | /// up to three. Any remaining source locations in this array will be |
969 | /// set to an invalid value for operators with fewer than three tokens. |
970 | SourceLocation SymbolLocations[3]; |
971 | }; |
972 | |
973 | /// Anonymous union that holds extra data associated with the |
974 | /// parsed unqualified-id. |
975 | union { |
976 | /// When Kind == IK_Identifier, the parsed identifier, or when |
977 | /// Kind == IK_UserLiteralId, the identifier suffix. |
978 | IdentifierInfo *Identifier; |
979 | |
980 | /// When Kind == IK_OperatorFunctionId, the overloaded operator |
981 | /// that we parsed. |
982 | struct OFI OperatorFunctionId; |
983 | |
984 | /// When Kind == IK_ConversionFunctionId, the type that the |
985 | /// conversion function names. |
986 | UnionParsedType ConversionFunctionId; |
987 | |
988 | /// When Kind == IK_ConstructorName, the class-name of the type |
989 | /// whose constructor is being referenced. |
990 | UnionParsedType ConstructorName; |
991 | |
992 | /// When Kind == IK_DestructorName, the type referred to by the |
993 | /// class-name. |
994 | UnionParsedType DestructorName; |
995 | |
996 | /// When Kind == IK_DeductionGuideName, the parsed template-name. |
997 | UnionParsedTemplateTy TemplateName; |
998 | |
999 | /// When Kind == IK_TemplateId or IK_ConstructorTemplateId, |
1000 | /// the template-id annotation that contains the template name and |
1001 | /// template arguments. |
1002 | TemplateIdAnnotation *TemplateId; |
1003 | }; |
1004 | |
1005 | /// The location of the first token that describes this unqualified-id, |
1006 | /// which will be the location of the identifier, "operator" keyword, |
1007 | /// tilde (for a destructor), or the template name of a template-id. |
1008 | SourceLocation StartLocation; |
1009 | |
1010 | /// The location of the last token that describes this unqualified-id. |
1011 | SourceLocation EndLocation; |
1012 | |
1013 | UnqualifiedId() |
1014 | : Kind(UnqualifiedIdKind::IK_Identifier), Identifier(nullptr) {} |
1015 | |
1016 | /// Clear out this unqualified-id, setting it to default (invalid) |
1017 | /// state. |
1018 | void clear() { |
1019 | Kind = UnqualifiedIdKind::IK_Identifier; |
1020 | Identifier = nullptr; |
1021 | StartLocation = SourceLocation(); |
1022 | EndLocation = SourceLocation(); |
1023 | } |
1024 | |
1025 | /// Determine whether this unqualified-id refers to a valid name. |
1026 | bool isValid() const { return StartLocation.isValid(); } |
1027 | |
1028 | /// Determine whether this unqualified-id refers to an invalid name. |
1029 | bool isInvalid() const { return !isValid(); } |
1030 | |
1031 | /// Determine what kind of name we have. |
1032 | UnqualifiedIdKind getKind() const { return Kind; } |
1033 | |
1034 | /// Specify that this unqualified-id was parsed as an identifier. |
1035 | /// |
1036 | /// \param Id the parsed identifier. |
1037 | /// \param IdLoc the location of the parsed identifier. |
1038 | void setIdentifier(const IdentifierInfo *Id, SourceLocation IdLoc) { |
1039 | Kind = UnqualifiedIdKind::IK_Identifier; |
1040 | Identifier = const_cast<IdentifierInfo *>(Id); |
1041 | StartLocation = EndLocation = IdLoc; |
1042 | } |
1043 | |
1044 | /// Specify that this unqualified-id was parsed as an |
1045 | /// operator-function-id. |
1046 | /// |
1047 | /// \param OperatorLoc the location of the 'operator' keyword. |
1048 | /// |
1049 | /// \param Op the overloaded operator. |
1050 | /// |
1051 | /// \param SymbolLocations the locations of the individual operator symbols |
1052 | /// in the operator. |
1053 | void setOperatorFunctionId(SourceLocation OperatorLoc, |
1054 | OverloadedOperatorKind Op, |
1055 | SourceLocation SymbolLocations[3]); |
1056 | |
1057 | /// Specify that this unqualified-id was parsed as a |
1058 | /// conversion-function-id. |
1059 | /// |
1060 | /// \param OperatorLoc the location of the 'operator' keyword. |
1061 | /// |
1062 | /// \param Ty the type to which this conversion function is converting. |
1063 | /// |
1064 | /// \param EndLoc the location of the last token that makes up the type name. |
1065 | void setConversionFunctionId(SourceLocation OperatorLoc, |
1066 | ParsedType Ty, |
1067 | SourceLocation EndLoc) { |
1068 | Kind = UnqualifiedIdKind::IK_ConversionFunctionId; |
1069 | StartLocation = OperatorLoc; |
1070 | EndLocation = EndLoc; |
1071 | ConversionFunctionId = Ty; |
1072 | } |
1073 | |
1074 | /// Specific that this unqualified-id was parsed as a |
1075 | /// literal-operator-id. |
1076 | /// |
1077 | /// \param Id the parsed identifier. |
1078 | /// |
1079 | /// \param OpLoc the location of the 'operator' keyword. |
1080 | /// |
1081 | /// \param IdLoc the location of the identifier. |
1082 | void setLiteralOperatorId(const IdentifierInfo *Id, SourceLocation OpLoc, |
1083 | SourceLocation IdLoc) { |
1084 | Kind = UnqualifiedIdKind::IK_LiteralOperatorId; |
1085 | Identifier = const_cast<IdentifierInfo *>(Id); |
1086 | StartLocation = OpLoc; |
1087 | EndLocation = IdLoc; |
1088 | } |
1089 | |
1090 | /// Specify that this unqualified-id was parsed as a constructor name. |
1091 | /// |
1092 | /// \param ClassType the class type referred to by the constructor name. |
1093 | /// |
1094 | /// \param ClassNameLoc the location of the class name. |
1095 | /// |
1096 | /// \param EndLoc the location of the last token that makes up the type name. |
1097 | void setConstructorName(ParsedType ClassType, |
1098 | SourceLocation ClassNameLoc, |
1099 | SourceLocation EndLoc) { |
1100 | Kind = UnqualifiedIdKind::IK_ConstructorName; |
1101 | StartLocation = ClassNameLoc; |
1102 | EndLocation = EndLoc; |
1103 | ConstructorName = ClassType; |
1104 | } |
1105 | |
1106 | /// Specify that this unqualified-id was parsed as a |
1107 | /// template-id that names a constructor. |
1108 | /// |
1109 | /// \param TemplateId the template-id annotation that describes the parsed |
1110 | /// template-id. This UnqualifiedId instance will take ownership of the |
1111 | /// \p TemplateId and will free it on destruction. |
1112 | void setConstructorTemplateId(TemplateIdAnnotation *TemplateId); |
1113 | |
1114 | /// Specify that this unqualified-id was parsed as a destructor name. |
1115 | /// |
1116 | /// \param TildeLoc the location of the '~' that introduces the destructor |
1117 | /// name. |
1118 | /// |
1119 | /// \param ClassType the name of the class referred to by the destructor name. |
1120 | void setDestructorName(SourceLocation TildeLoc, |
1121 | ParsedType ClassType, |
1122 | SourceLocation EndLoc) { |
1123 | Kind = UnqualifiedIdKind::IK_DestructorName; |
1124 | StartLocation = TildeLoc; |
1125 | EndLocation = EndLoc; |
1126 | DestructorName = ClassType; |
1127 | } |
1128 | |
1129 | /// Specify that this unqualified-id was parsed as a template-id. |
1130 | /// |
1131 | /// \param TemplateId the template-id annotation that describes the parsed |
1132 | /// template-id. This UnqualifiedId instance will take ownership of the |
1133 | /// \p TemplateId and will free it on destruction. |
1134 | void setTemplateId(TemplateIdAnnotation *TemplateId); |
1135 | |
1136 | /// Specify that this unqualified-id was parsed as a template-name for |
1137 | /// a deduction-guide. |
1138 | /// |
1139 | /// \param Template The parsed template-name. |
1140 | /// \param TemplateLoc The location of the parsed template-name. |
1141 | void setDeductionGuideName(ParsedTemplateTy Template, |
1142 | SourceLocation TemplateLoc) { |
1143 | Kind = UnqualifiedIdKind::IK_DeductionGuideName; |
1144 | TemplateName = Template; |
1145 | StartLocation = EndLocation = TemplateLoc; |
1146 | } |
1147 | |
1148 | /// Specify that this unqualified-id is an implicit 'self' |
1149 | /// parameter. |
1150 | /// |
1151 | /// \param Id the identifier. |
1152 | void setImplicitSelfParam(const IdentifierInfo *Id) { |
1153 | Kind = UnqualifiedIdKind::IK_ImplicitSelfParam; |
1154 | Identifier = const_cast<IdentifierInfo *>(Id); |
1155 | StartLocation = EndLocation = SourceLocation(); |
1156 | } |
1157 | |
1158 | /// Return the source range that covers this unqualified-id. |
1159 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { |
1160 | return SourceRange(StartLocation, EndLocation); |
1161 | } |
1162 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return StartLocation; } |
1163 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return EndLocation; } |
1164 | }; |
1165 | |
1166 | /// A set of tokens that has been cached for later parsing. |
1167 | typedef SmallVector<Token, 4> CachedTokens; |
1168 | |
1169 | /// One instance of this struct is used for each type in a |
1170 | /// declarator that is parsed. |
1171 | /// |
1172 | /// This is intended to be a small value object. |
1173 | struct DeclaratorChunk { |
1174 | DeclaratorChunk() {}; |
1175 | |
1176 | enum { |
1177 | Pointer, Reference, Array, Function, BlockPointer, MemberPointer, Paren, Pipe |
1178 | } Kind; |
1179 | |
1180 | /// Loc - The place where this type was defined. |
1181 | SourceLocation Loc; |
1182 | /// EndLoc - If valid, the place where this chunck ends. |
1183 | SourceLocation EndLoc; |
1184 | |
1185 | SourceRange getSourceRange() const { |
1186 | if (EndLoc.isInvalid()) |
1187 | return SourceRange(Loc, Loc); |
1188 | return SourceRange(Loc, EndLoc); |
1189 | } |
1190 | |
1191 | ParsedAttributesView AttrList; |
1192 | |
1193 | struct PointerTypeInfo { |
1194 | /// The type qualifiers: const/volatile/restrict/unaligned/atomic. |
1195 | unsigned TypeQuals : 5; |
1196 | |
1197 | /// The location of the const-qualifier, if any. |
1198 | SourceLocation ConstQualLoc; |
1199 | |
1200 | /// The location of the volatile-qualifier, if any. |
1201 | SourceLocation VolatileQualLoc; |
1202 | |
1203 | /// The location of the restrict-qualifier, if any. |
1204 | SourceLocation RestrictQualLoc; |
1205 | |
1206 | /// The location of the _Atomic-qualifier, if any. |
1207 | SourceLocation AtomicQualLoc; |
1208 | |
1209 | /// The location of the __unaligned-qualifier, if any. |
1210 | SourceLocation UnalignedQualLoc; |
1211 | |
1212 | void destroy() { |
1213 | } |
1214 | }; |
1215 | |
1216 | struct ReferenceTypeInfo { |
1217 | /// The type qualifier: restrict. [GNU] C++ extension |
1218 | bool HasRestrict : 1; |
1219 | /// True if this is an lvalue reference, false if it's an rvalue reference. |
1220 | bool LValueRef : 1; |
1221 | void destroy() { |
1222 | } |
1223 | }; |
1224 | |
1225 | struct ArrayTypeInfo { |
1226 | /// The type qualifiers for the array: |
1227 | /// const/volatile/restrict/__unaligned/_Atomic. |
1228 | unsigned TypeQuals : 5; |
1229 | |
1230 | /// True if this dimension included the 'static' keyword. |
1231 | unsigned hasStatic : 1; |
1232 | |
1233 | /// True if this dimension was [*]. In this case, NumElts is null. |
1234 | unsigned isStar : 1; |
1235 | |
1236 | /// This is the size of the array, or null if [] or [*] was specified. |
1237 | /// Since the parser is multi-purpose, and we don't want to impose a root |
1238 | /// expression class on all clients, NumElts is untyped. |
1239 | Expr *NumElts; |
1240 | |
1241 | void destroy() {} |
1242 | }; |
1243 | |
1244 | /// ParamInfo - An array of paraminfo objects is allocated whenever a function |
1245 | /// declarator is parsed. There are two interesting styles of parameters |
1246 | /// here: |
1247 | /// K&R-style identifier lists and parameter type lists. K&R-style identifier |
1248 | /// lists will have information about the identifier, but no type information. |
1249 | /// Parameter type lists will have type info (if the actions module provides |
1250 | /// it), but may have null identifier info: e.g. for 'void foo(int X, int)'. |
1251 | struct ParamInfo { |
1252 | IdentifierInfo *Ident; |
1253 | SourceLocation IdentLoc; |
1254 | Decl *Param; |
1255 | |
1256 | /// DefaultArgTokens - When the parameter's default argument |
1257 | /// cannot be parsed immediately (because it occurs within the |
1258 | /// declaration of a member function), it will be stored here as a |
1259 | /// sequence of tokens to be parsed once the class definition is |
1260 | /// complete. Non-NULL indicates that there is a default argument. |
1261 | std::unique_ptr<CachedTokens> DefaultArgTokens; |
1262 | |
1263 | ParamInfo() = default; |
1264 | ParamInfo(IdentifierInfo *ident, SourceLocation iloc, |
1265 | Decl *param, |
1266 | std::unique_ptr<CachedTokens> DefArgTokens = nullptr) |
1267 | : Ident(ident), IdentLoc(iloc), Param(param), |
1268 | DefaultArgTokens(std::move(DefArgTokens)) {} |
1269 | }; |
1270 | |
1271 | struct TypeAndRange { |
1272 | ParsedType Ty; |
1273 | SourceRange Range; |
1274 | }; |
1275 | |
1276 | struct FunctionTypeInfo { |
1277 | /// hasPrototype - This is true if the function had at least one typed |
1278 | /// parameter. If the function is () or (a,b,c), then it has no prototype, |
1279 | /// and is treated as a K&R-style function. |
1280 | unsigned hasPrototype : 1; |
1281 | |
1282 | /// isVariadic - If this function has a prototype, and if that |
1283 | /// proto ends with ',...)', this is true. When true, EllipsisLoc |
1284 | /// contains the location of the ellipsis. |
1285 | unsigned isVariadic : 1; |
1286 | |
1287 | /// Can this declaration be a constructor-style initializer? |
1288 | unsigned isAmbiguous : 1; |
1289 | |
1290 | /// Whether the ref-qualifier (if any) is an lvalue reference. |
1291 | /// Otherwise, it's an rvalue reference. |
1292 | unsigned RefQualifierIsLValueRef : 1; |
1293 | |
1294 | /// ExceptionSpecType - An ExceptionSpecificationType value. |
1295 | unsigned ExceptionSpecType : 4; |
1296 | |
1297 | /// DeleteParams - If this is true, we need to delete[] Params. |
1298 | unsigned DeleteParams : 1; |
1299 | |
1300 | /// HasTrailingReturnType - If this is true, a trailing return type was |
1301 | /// specified. |
1302 | unsigned HasTrailingReturnType : 1; |
1303 | |
1304 | /// The location of the left parenthesis in the source. |
1305 | SourceLocation LParenLoc; |
1306 | |
1307 | /// When isVariadic is true, the location of the ellipsis in the source. |
1308 | SourceLocation EllipsisLoc; |
1309 | |
1310 | /// The location of the right parenthesis in the source. |
1311 | SourceLocation RParenLoc; |
1312 | |
1313 | /// NumParams - This is the number of formal parameters specified by the |
1314 | /// declarator. |
1315 | unsigned NumParams; |
1316 | |
1317 | /// NumExceptionsOrDecls - This is the number of types in the |
1318 | /// dynamic-exception-decl, if the function has one. In C, this is the |
1319 | /// number of declarations in the function prototype. |
1320 | unsigned NumExceptionsOrDecls; |
1321 | |
1322 | /// The location of the ref-qualifier, if any. |
1323 | /// |
1324 | /// If this is an invalid location, there is no ref-qualifier. |
1325 | SourceLocation RefQualifierLoc; |
1326 | |
1327 | /// The location of the 'mutable' qualifer in a lambda-declarator, if |
1328 | /// any. |
1329 | SourceLocation MutableLoc; |
1330 | |
1331 | /// The beginning location of the exception specification, if any. |
1332 | SourceLocation ExceptionSpecLocBeg; |
1333 | |
1334 | /// The end location of the exception specification, if any. |
1335 | SourceLocation ExceptionSpecLocEnd; |
1336 | |
1337 | /// Params - This is a pointer to a new[]'d array of ParamInfo objects that |
1338 | /// describe the parameters specified by this function declarator. null if |
1339 | /// there are no parameters specified. |
1340 | ParamInfo *Params; |
1341 | |
1342 | /// DeclSpec for the function with the qualifier related info. |
1343 | DeclSpec *MethodQualifiers; |
1344 | |
1345 | /// AtttibuteFactory for the MethodQualifiers. |
1346 | AttributeFactory *QualAttrFactory; |
1347 | |
1348 | union { |
1349 | /// Pointer to a new[]'d array of TypeAndRange objects that |
1350 | /// contain the types in the function's dynamic exception specification |
1351 | /// and their locations, if there is one. |
1352 | TypeAndRange *Exceptions; |
1353 | |
1354 | /// Pointer to the expression in the noexcept-specifier of this |
1355 | /// function, if it has one. |
1356 | Expr *NoexceptExpr; |
1357 | |
1358 | /// Pointer to the cached tokens for an exception-specification |
1359 | /// that has not yet been parsed. |
1360 | CachedTokens *ExceptionSpecTokens; |
1361 | |
1362 | /// Pointer to a new[]'d array of declarations that need to be available |
1363 | /// for lookup inside the function body, if one exists. Does not exist in |
1364 | /// C++. |
1365 | NamedDecl **DeclsInPrototype; |
1366 | }; |
1367 | |
1368 | /// If HasTrailingReturnType is true, this is the trailing return |
1369 | /// type specified. |
1370 | UnionParsedType TrailingReturnType; |
1371 | |
1372 | /// If HasTrailingReturnType is true, this is the location of the trailing |
1373 | /// return type. |
1374 | SourceLocation TrailingReturnTypeLoc; |
1375 | |
1376 | /// Reset the parameter list to having zero parameters. |
1377 | /// |
1378 | /// This is used in various places for error recovery. |
1379 | void freeParams() { |
1380 | for (unsigned I = 0; I < NumParams; ++I) |
1381 | Params[I].DefaultArgTokens.reset(); |
1382 | if (DeleteParams) { |
1383 | delete[] Params; |
1384 | DeleteParams = false; |
1385 | } |
1386 | NumParams = 0; |
1387 | } |
1388 | |
1389 | void destroy() { |
1390 | freeParams(); |
1391 | delete QualAttrFactory; |
1392 | delete MethodQualifiers; |
1393 | switch (getExceptionSpecType()) { |
1394 | default: |
1395 | break; |
1396 | case EST_Dynamic: |
1397 | delete[] Exceptions; |
1398 | break; |
1399 | case EST_Unparsed: |
1400 | delete ExceptionSpecTokens; |
1401 | break; |
1402 | case EST_None: |
1403 | if (NumExceptionsOrDecls != 0) |
1404 | delete[] DeclsInPrototype; |
1405 | break; |
1406 | } |
1407 | } |
1408 | |
1409 | DeclSpec &getOrCreateMethodQualifiers() { |
1410 | if (!MethodQualifiers) { |
1411 | QualAttrFactory = new AttributeFactory(); |
1412 | MethodQualifiers = new DeclSpec(*QualAttrFactory); |
1413 | } |
1414 | return *MethodQualifiers; |
1415 | } |
1416 | |
1417 | /// isKNRPrototype - Return true if this is a K&R style identifier list, |
1418 | /// like "void foo(a,b,c)". In a function definition, this will be followed |
1419 | /// by the parameter type definitions. |
1420 | bool isKNRPrototype() const { return !hasPrototype && NumParams != 0; } |
1421 | |
1422 | SourceLocation getLParenLoc() const { return LParenLoc; } |
1423 | |
1424 | SourceLocation getEllipsisLoc() const { return EllipsisLoc; } |
1425 | |
1426 | SourceLocation getRParenLoc() const { return RParenLoc; } |
1427 | |
1428 | SourceLocation getExceptionSpecLocBeg() const { |
1429 | return ExceptionSpecLocBeg; |
1430 | } |
1431 | |
1432 | SourceLocation getExceptionSpecLocEnd() const { |
1433 | return ExceptionSpecLocEnd; |
1434 | } |
1435 | |
1436 | SourceRange getExceptionSpecRange() const { |
1437 | return SourceRange(getExceptionSpecLocBeg(), getExceptionSpecLocEnd()); |
1438 | } |
1439 | |
1440 | /// Retrieve the location of the ref-qualifier, if any. |
1441 | SourceLocation getRefQualifierLoc() const { return RefQualifierLoc; } |
1442 | |
1443 | /// Retrieve the location of the 'const' qualifier. |
1444 | SourceLocation getConstQualifierLoc() const { |
1445 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 1445, __extension__ __PRETTY_FUNCTION__)); |
1446 | return MethodQualifiers->getConstSpecLoc(); |
1447 | } |
1448 | |
1449 | /// Retrieve the location of the 'volatile' qualifier. |
1450 | SourceLocation getVolatileQualifierLoc() const { |
1451 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 1451, __extension__ __PRETTY_FUNCTION__)); |
1452 | return MethodQualifiers->getVolatileSpecLoc(); |
1453 | } |
1454 | |
1455 | /// Retrieve the location of the 'restrict' qualifier. |
1456 | SourceLocation getRestrictQualifierLoc() const { |
1457 | assert(MethodQualifiers)(static_cast <bool> (MethodQualifiers) ? void (0) : __assert_fail ("MethodQualifiers", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 1457, __extension__ __PRETTY_FUNCTION__)); |
1458 | return MethodQualifiers->getRestrictSpecLoc(); |
1459 | } |
1460 | |
1461 | /// Retrieve the location of the 'mutable' qualifier, if any. |
1462 | SourceLocation getMutableLoc() const { return MutableLoc; } |
1463 | |
1464 | /// Determine whether this function declaration contains a |
1465 | /// ref-qualifier. |
1466 | bool hasRefQualifier() const { return getRefQualifierLoc().isValid(); } |
1467 | |
1468 | /// Determine whether this lambda-declarator contains a 'mutable' |
1469 | /// qualifier. |
1470 | bool hasMutableQualifier() const { return getMutableLoc().isValid(); } |
1471 | |
1472 | /// Determine whether this method has qualifiers. |
1473 | bool hasMethodTypeQualifiers() const { |
1474 | return MethodQualifiers && (MethodQualifiers->getTypeQualifiers() || |
1475 | MethodQualifiers->getAttributes().size()); |
1476 | } |
1477 | |
1478 | /// Get the type of exception specification this function has. |
1479 | ExceptionSpecificationType getExceptionSpecType() const { |
1480 | return static_cast<ExceptionSpecificationType>(ExceptionSpecType); |
1481 | } |
1482 | |
1483 | /// Get the number of dynamic exception specifications. |
1484 | unsigned getNumExceptions() const { |
1485 | assert(ExceptionSpecType != EST_None)(static_cast <bool> (ExceptionSpecType != EST_None) ? void (0) : __assert_fail ("ExceptionSpecType != EST_None", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 1485, __extension__ __PRETTY_FUNCTION__)); |
1486 | return NumExceptionsOrDecls; |
1487 | } |
1488 | |
1489 | /// Get the non-parameter decls defined within this function |
1490 | /// prototype. Typically these are tag declarations. |
1491 | ArrayRef<NamedDecl *> getDeclsInPrototype() const { |
1492 | assert(ExceptionSpecType == EST_None)(static_cast <bool> (ExceptionSpecType == EST_None) ? void (0) : __assert_fail ("ExceptionSpecType == EST_None", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 1492, __extension__ __PRETTY_FUNCTION__)); |
1493 | return llvm::makeArrayRef(DeclsInPrototype, NumExceptionsOrDecls); |
1494 | } |
1495 | |
1496 | /// Determine whether this function declarator had a |
1497 | /// trailing-return-type. |
1498 | bool hasTrailingReturnType() const { return HasTrailingReturnType; } |
1499 | |
1500 | /// Get the trailing-return-type for this function declarator. |
1501 | ParsedType getTrailingReturnType() const { |
1502 | assert(HasTrailingReturnType)(static_cast <bool> (HasTrailingReturnType) ? void (0) : __assert_fail ("HasTrailingReturnType", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 1502, __extension__ __PRETTY_FUNCTION__)); |
1503 | return TrailingReturnType; |
1504 | } |
1505 | |
1506 | /// Get the trailing-return-type location for this function declarator. |
1507 | SourceLocation getTrailingReturnTypeLoc() const { |
1508 | assert(HasTrailingReturnType)(static_cast <bool> (HasTrailingReturnType) ? void (0) : __assert_fail ("HasTrailingReturnType", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 1508, __extension__ __PRETTY_FUNCTION__)); |
1509 | return TrailingReturnTypeLoc; |
1510 | } |
1511 | }; |
1512 | |
1513 | struct BlockPointerTypeInfo { |
1514 | /// For now, sema will catch these as invalid. |
1515 | /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic. |
1516 | unsigned TypeQuals : 5; |
1517 | |
1518 | void destroy() { |
1519 | } |
1520 | }; |
1521 | |
1522 | struct MemberPointerTypeInfo { |
1523 | /// The type qualifiers: const/volatile/restrict/__unaligned/_Atomic. |
1524 | unsigned TypeQuals : 5; |
1525 | /// Location of the '*' token. |
1526 | SourceLocation StarLoc; |
1527 | // CXXScopeSpec has a constructor, so it can't be a direct member. |
1528 | // So we need some pointer-aligned storage and a bit of trickery. |
1529 | alignas(CXXScopeSpec) char ScopeMem[sizeof(CXXScopeSpec)]; |
1530 | CXXScopeSpec &Scope() { |
1531 | return *reinterpret_cast<CXXScopeSpec *>(ScopeMem); |
1532 | } |
1533 | const CXXScopeSpec &Scope() const { |
1534 | return *reinterpret_cast<const CXXScopeSpec *>(ScopeMem); |
1535 | } |
1536 | void destroy() { |
1537 | Scope().~CXXScopeSpec(); |
1538 | } |
1539 | }; |
1540 | |
1541 | struct PipeTypeInfo { |
1542 | /// The access writes. |
1543 | unsigned AccessWrites : 3; |
1544 | |
1545 | void destroy() {} |
1546 | }; |
1547 | |
1548 | union { |
1549 | PointerTypeInfo Ptr; |
1550 | ReferenceTypeInfo Ref; |
1551 | ArrayTypeInfo Arr; |
1552 | FunctionTypeInfo Fun; |
1553 | BlockPointerTypeInfo Cls; |
1554 | MemberPointerTypeInfo Mem; |
1555 | PipeTypeInfo PipeInfo; |
1556 | }; |
1557 | |
1558 | void destroy() { |
1559 | switch (Kind) { |
1560 | case DeclaratorChunk::Function: return Fun.destroy(); |
1561 | case DeclaratorChunk::Pointer: return Ptr.destroy(); |
1562 | case DeclaratorChunk::BlockPointer: return Cls.destroy(); |
1563 | case DeclaratorChunk::Reference: return Ref.destroy(); |
1564 | case DeclaratorChunk::Array: return Arr.destroy(); |
1565 | case DeclaratorChunk::MemberPointer: return Mem.destroy(); |
1566 | case DeclaratorChunk::Paren: return; |
1567 | case DeclaratorChunk::Pipe: return PipeInfo.destroy(); |
1568 | } |
1569 | } |
1570 | |
1571 | /// If there are attributes applied to this declaratorchunk, return |
1572 | /// them. |
1573 | const ParsedAttributesView &getAttrs() const { return AttrList; } |
1574 | ParsedAttributesView &getAttrs() { return AttrList; } |
1575 | |
1576 | /// Return a DeclaratorChunk for a pointer. |
1577 | static DeclaratorChunk getPointer(unsigned TypeQuals, SourceLocation Loc, |
1578 | SourceLocation ConstQualLoc, |
1579 | SourceLocation VolatileQualLoc, |
1580 | SourceLocation RestrictQualLoc, |
1581 | SourceLocation AtomicQualLoc, |
1582 | SourceLocation UnalignedQualLoc) { |
1583 | DeclaratorChunk I; |
1584 | I.Kind = Pointer; |
1585 | I.Loc = Loc; |
1586 | new (&I.Ptr) PointerTypeInfo; |
1587 | I.Ptr.TypeQuals = TypeQuals; |
1588 | I.Ptr.ConstQualLoc = ConstQualLoc; |
1589 | I.Ptr.VolatileQualLoc = VolatileQualLoc; |
1590 | I.Ptr.RestrictQualLoc = RestrictQualLoc; |
1591 | I.Ptr.AtomicQualLoc = AtomicQualLoc; |
1592 | I.Ptr.UnalignedQualLoc = UnalignedQualLoc; |
1593 | return I; |
1594 | } |
1595 | |
1596 | /// Return a DeclaratorChunk for a reference. |
1597 | static DeclaratorChunk getReference(unsigned TypeQuals, SourceLocation Loc, |
1598 | bool lvalue) { |
1599 | DeclaratorChunk I; |
1600 | I.Kind = Reference; |
1601 | I.Loc = Loc; |
1602 | I.Ref.HasRestrict = (TypeQuals & DeclSpec::TQ_restrict) != 0; |
1603 | I.Ref.LValueRef = lvalue; |
1604 | return I; |
1605 | } |
1606 | |
1607 | /// Return a DeclaratorChunk for an array. |
1608 | static DeclaratorChunk getArray(unsigned TypeQuals, |
1609 | bool isStatic, bool isStar, Expr *NumElts, |
1610 | SourceLocation LBLoc, SourceLocation RBLoc) { |
1611 | DeclaratorChunk I; |
1612 | I.Kind = Array; |
1613 | I.Loc = LBLoc; |
1614 | I.EndLoc = RBLoc; |
1615 | I.Arr.TypeQuals = TypeQuals; |
1616 | I.Arr.hasStatic = isStatic; |
1617 | I.Arr.isStar = isStar; |
1618 | I.Arr.NumElts = NumElts; |
1619 | return I; |
1620 | } |
1621 | |
1622 | /// DeclaratorChunk::getFunction - Return a DeclaratorChunk for a function. |
1623 | /// "TheDeclarator" is the declarator that this will be added to. |
1624 | static DeclaratorChunk getFunction(bool HasProto, |
1625 | bool IsAmbiguous, |
1626 | SourceLocation LParenLoc, |
1627 | ParamInfo *Params, unsigned NumParams, |
1628 | SourceLocation EllipsisLoc, |
1629 | SourceLocation RParenLoc, |
1630 | bool RefQualifierIsLvalueRef, |
1631 | SourceLocation RefQualifierLoc, |
1632 | SourceLocation MutableLoc, |
1633 | ExceptionSpecificationType ESpecType, |
1634 | SourceRange ESpecRange, |
1635 | ParsedType *Exceptions, |
1636 | SourceRange *ExceptionRanges, |
1637 | unsigned NumExceptions, |
1638 | Expr *NoexceptExpr, |
1639 | CachedTokens *ExceptionSpecTokens, |
1640 | ArrayRef<NamedDecl *> DeclsInPrototype, |
1641 | SourceLocation LocalRangeBegin, |
1642 | SourceLocation LocalRangeEnd, |
1643 | Declarator &TheDeclarator, |
1644 | TypeResult TrailingReturnType = |
1645 | TypeResult(), |
1646 | SourceLocation TrailingReturnTypeLoc = |
1647 | SourceLocation(), |
1648 | DeclSpec *MethodQualifiers = nullptr); |
1649 | |
1650 | /// Return a DeclaratorChunk for a block. |
1651 | static DeclaratorChunk getBlockPointer(unsigned TypeQuals, |
1652 | SourceLocation Loc) { |
1653 | DeclaratorChunk I; |
1654 | I.Kind = BlockPointer; |
1655 | I.Loc = Loc; |
1656 | I.Cls.TypeQuals = TypeQuals; |
1657 | return I; |
1658 | } |
1659 | |
1660 | /// Return a DeclaratorChunk for a block. |
1661 | static DeclaratorChunk getPipe(unsigned TypeQuals, |
1662 | SourceLocation Loc) { |
1663 | DeclaratorChunk I; |
1664 | I.Kind = Pipe; |
1665 | I.Loc = Loc; |
1666 | I.Cls.TypeQuals = TypeQuals; |
1667 | return I; |
1668 | } |
1669 | |
1670 | static DeclaratorChunk getMemberPointer(const CXXScopeSpec &SS, |
1671 | unsigned TypeQuals, |
1672 | SourceLocation StarLoc, |
1673 | SourceLocation EndLoc) { |
1674 | DeclaratorChunk I; |
1675 | I.Kind = MemberPointer; |
1676 | I.Loc = SS.getBeginLoc(); |
1677 | I.EndLoc = EndLoc; |
1678 | new (&I.Mem) MemberPointerTypeInfo; |
1679 | I.Mem.StarLoc = StarLoc; |
1680 | I.Mem.TypeQuals = TypeQuals; |
1681 | new (I.Mem.ScopeMem) CXXScopeSpec(SS); |
1682 | return I; |
1683 | } |
1684 | |
1685 | /// Return a DeclaratorChunk for a paren. |
1686 | static DeclaratorChunk getParen(SourceLocation LParenLoc, |
1687 | SourceLocation RParenLoc) { |
1688 | DeclaratorChunk I; |
1689 | I.Kind = Paren; |
1690 | I.Loc = LParenLoc; |
1691 | I.EndLoc = RParenLoc; |
1692 | return I; |
1693 | } |
1694 | |
1695 | bool isParen() const { |
1696 | return Kind == Paren; |
1697 | } |
1698 | }; |
1699 | |
1700 | /// A parsed C++17 decomposition declarator of the form |
1701 | /// '[' identifier-list ']' |
1702 | class DecompositionDeclarator { |
1703 | public: |
1704 | struct Binding { |
1705 | IdentifierInfo *Name; |
1706 | SourceLocation NameLoc; |
1707 | }; |
1708 | |
1709 | private: |
1710 | /// The locations of the '[' and ']' tokens. |
1711 | SourceLocation LSquareLoc, RSquareLoc; |
1712 | |
1713 | /// The bindings. |
1714 | Binding *Bindings; |
1715 | unsigned NumBindings : 31; |
1716 | unsigned DeleteBindings : 1; |
1717 | |
1718 | friend class Declarator; |
1719 | |
1720 | public: |
1721 | DecompositionDeclarator() |
1722 | : Bindings(nullptr), NumBindings(0), DeleteBindings(false) {} |
1723 | DecompositionDeclarator(const DecompositionDeclarator &G) = delete; |
1724 | DecompositionDeclarator &operator=(const DecompositionDeclarator &G) = delete; |
1725 | ~DecompositionDeclarator() { |
1726 | if (DeleteBindings) |
1727 | delete[] Bindings; |
1728 | } |
1729 | |
1730 | void clear() { |
1731 | LSquareLoc = RSquareLoc = SourceLocation(); |
1732 | if (DeleteBindings) |
1733 | delete[] Bindings; |
1734 | Bindings = nullptr; |
1735 | NumBindings = 0; |
1736 | DeleteBindings = false; |
1737 | } |
1738 | |
1739 | ArrayRef<Binding> bindings() const { |
1740 | return llvm::makeArrayRef(Bindings, NumBindings); |
1741 | } |
1742 | |
1743 | bool isSet() const { return LSquareLoc.isValid(); } |
1744 | |
1745 | SourceLocation getLSquareLoc() const { return LSquareLoc; } |
1746 | SourceLocation getRSquareLoc() const { return RSquareLoc; } |
1747 | SourceRange getSourceRange() const { |
1748 | return SourceRange(LSquareLoc, RSquareLoc); |
1749 | } |
1750 | }; |
1751 | |
1752 | /// Described the kind of function definition (if any) provided for |
1753 | /// a function. |
1754 | enum class FunctionDefinitionKind { |
1755 | Declaration, |
1756 | Definition, |
1757 | Defaulted, |
1758 | Deleted |
1759 | }; |
1760 | |
1761 | enum class DeclaratorContext { |
1762 | File, // File scope declaration. |
1763 | Prototype, // Within a function prototype. |
1764 | ObjCResult, // An ObjC method result type. |
1765 | ObjCParameter, // An ObjC method parameter type. |
1766 | KNRTypeList, // K&R type definition list for formals. |
1767 | TypeName, // Abstract declarator for types. |
1768 | FunctionalCast, // Type in a C++ functional cast expression. |
1769 | Member, // Struct/Union field. |
1770 | Block, // Declaration within a block in a function. |
1771 | ForInit, // Declaration within first part of a for loop. |
1772 | SelectionInit, // Declaration within optional init stmt of if/switch. |
1773 | Condition, // Condition declaration in a C++ if/switch/while/for. |
1774 | TemplateParam, // Within a template parameter list. |
1775 | CXXNew, // C++ new-expression. |
1776 | CXXCatch, // C++ catch exception-declaration |
1777 | ObjCCatch, // Objective-C catch exception-declaration |
1778 | BlockLiteral, // Block literal declarator. |
1779 | LambdaExpr, // Lambda-expression declarator. |
1780 | LambdaExprParameter, // Lambda-expression parameter declarator. |
1781 | ConversionId, // C++ conversion-type-id. |
1782 | TrailingReturn, // C++11 trailing-type-specifier. |
1783 | TrailingReturnVar, // C++11 trailing-type-specifier for variable. |
1784 | TemplateArg, // Any template argument (in template argument list). |
1785 | TemplateTypeArg, // Template type argument (in default argument). |
1786 | AliasDecl, // C++11 alias-declaration. |
1787 | AliasTemplate, // C++11 alias-declaration template. |
1788 | RequiresExpr // C++2a requires-expression. |
1789 | }; |
1790 | |
1791 | /// Information about one declarator, including the parsed type |
1792 | /// information and the identifier. |
1793 | /// |
1794 | /// When the declarator is fully formed, this is turned into the appropriate |
1795 | /// Decl object. |
1796 | /// |
1797 | /// Declarators come in two types: normal declarators and abstract declarators. |
1798 | /// Abstract declarators are used when parsing types, and don't have an |
1799 | /// identifier. Normal declarators do have ID's. |
1800 | /// |
1801 | /// Instances of this class should be a transient object that lives on the |
1802 | /// stack, not objects that are allocated in large quantities on the heap. |
1803 | class Declarator { |
1804 | |
1805 | private: |
1806 | const DeclSpec &DS; |
1807 | CXXScopeSpec SS; |
1808 | UnqualifiedId Name; |
1809 | SourceRange Range; |
1810 | |
1811 | /// Where we are parsing this declarator. |
1812 | DeclaratorContext Context; |
1813 | |
1814 | /// The C++17 structured binding, if any. This is an alternative to a Name. |
1815 | DecompositionDeclarator BindingGroup; |
1816 | |
1817 | /// DeclTypeInfo - This holds each type that the declarator includes as it is |
1818 | /// parsed. This is pushed from the identifier out, which means that element |
1819 | /// #0 will be the most closely bound to the identifier, and |
1820 | /// DeclTypeInfo.back() will be the least closely bound. |
1821 | SmallVector<DeclaratorChunk, 8> DeclTypeInfo; |
1822 | |
1823 | /// InvalidType - Set by Sema::GetTypeForDeclarator(). |
1824 | unsigned InvalidType : 1; |
1825 | |
1826 | /// GroupingParens - Set by Parser::ParseParenDeclarator(). |
1827 | unsigned GroupingParens : 1; |
1828 | |
1829 | /// FunctionDefinition - Is this Declarator for a function or member |
1830 | /// definition and, if so, what kind? |
1831 | /// |
1832 | /// Actually a FunctionDefinitionKind. |
1833 | unsigned FunctionDefinition : 2; |
1834 | |
1835 | /// Is this Declarator a redeclaration? |
1836 | unsigned Redeclaration : 1; |
1837 | |
1838 | /// true if the declaration is preceded by \c __extension__. |
1839 | unsigned Extension : 1; |
1840 | |
1841 | /// Indicates whether this is an Objective-C instance variable. |
1842 | unsigned ObjCIvar : 1; |
1843 | |
1844 | /// Indicates whether this is an Objective-C 'weak' property. |
1845 | unsigned ObjCWeakProperty : 1; |
1846 | |
1847 | /// Indicates whether the InlineParams / InlineBindings storage has been used. |
1848 | unsigned InlineStorageUsed : 1; |
1849 | |
1850 | /// Indicates whether this declarator has an initializer. |
1851 | unsigned HasInitializer : 1; |
1852 | |
1853 | /// Attrs - Attributes. |
1854 | ParsedAttributes Attrs; |
1855 | |
1856 | /// The asm label, if specified. |
1857 | Expr *AsmLabel; |
1858 | |
1859 | /// \brief The constraint-expression specified by the trailing |
1860 | /// requires-clause, or null if no such clause was specified. |
1861 | Expr *TrailingRequiresClause; |
1862 | |
1863 | /// If this declarator declares a template, its template parameter lists. |
1864 | ArrayRef<TemplateParameterList *> TemplateParameterLists; |
1865 | |
1866 | /// If the declarator declares an abbreviated function template, the innermost |
1867 | /// template parameter list containing the invented and explicit template |
1868 | /// parameters (if any). |
1869 | TemplateParameterList *InventedTemplateParameterList; |
1870 | |
1871 | #ifndef _MSC_VER |
1872 | union { |
1873 | #endif |
1874 | /// InlineParams - This is a local array used for the first function decl |
1875 | /// chunk to avoid going to the heap for the common case when we have one |
1876 | /// function chunk in the declarator. |
1877 | DeclaratorChunk::ParamInfo InlineParams[16]; |
1878 | DecompositionDeclarator::Binding InlineBindings[16]; |
1879 | #ifndef _MSC_VER |
1880 | }; |
1881 | #endif |
1882 | |
1883 | /// If this is the second or subsequent declarator in this declaration, |
1884 | /// the location of the comma before this declarator. |
1885 | SourceLocation CommaLoc; |
1886 | |
1887 | /// If provided, the source location of the ellipsis used to describe |
1888 | /// this declarator as a parameter pack. |
1889 | SourceLocation EllipsisLoc; |
1890 | |
1891 | friend struct DeclaratorChunk; |
1892 | |
1893 | public: |
1894 | Declarator(const DeclSpec &ds, DeclaratorContext C) |
1895 | : DS(ds), Range(ds.getSourceRange()), Context(C), |
1896 | InvalidType(DS.getTypeSpecType() == DeclSpec::TST_error), |
1897 | GroupingParens(false), FunctionDefinition(static_cast<unsigned>( |
1898 | FunctionDefinitionKind::Declaration)), |
1899 | Redeclaration(false), Extension(false), ObjCIvar(false), |
1900 | ObjCWeakProperty(false), InlineStorageUsed(false), |
1901 | HasInitializer(false), Attrs(ds.getAttributePool().getFactory()), |
1902 | AsmLabel(nullptr), TrailingRequiresClause(nullptr), |
1903 | InventedTemplateParameterList(nullptr) {} |
1904 | |
1905 | ~Declarator() { |
1906 | clear(); |
1907 | } |
1908 | /// getDeclSpec - Return the declaration-specifier that this declarator was |
1909 | /// declared with. |
1910 | const DeclSpec &getDeclSpec() const { return DS; } |
1911 | |
1912 | /// getMutableDeclSpec - Return a non-const version of the DeclSpec. This |
1913 | /// should be used with extreme care: declspecs can often be shared between |
1914 | /// multiple declarators, so mutating the DeclSpec affects all of the |
1915 | /// Declarators. This should only be done when the declspec is known to not |
1916 | /// be shared or when in error recovery etc. |
1917 | DeclSpec &getMutableDeclSpec() { return const_cast<DeclSpec &>(DS); } |
1918 | |
1919 | AttributePool &getAttributePool() const { |
1920 | return Attrs.getPool(); |
1921 | } |
1922 | |
1923 | /// getCXXScopeSpec - Return the C++ scope specifier (global scope or |
1924 | /// nested-name-specifier) that is part of the declarator-id. |
1925 | const CXXScopeSpec &getCXXScopeSpec() const { return SS; } |
1926 | CXXScopeSpec &getCXXScopeSpec() { return SS; } |
1927 | |
1928 | /// Retrieve the name specified by this declarator. |
1929 | UnqualifiedId &getName() { return Name; } |
1930 | |
1931 | const DecompositionDeclarator &getDecompositionDeclarator() const { |
1932 | return BindingGroup; |
1933 | } |
1934 | |
1935 | DeclaratorContext getContext() const { return Context; } |
1936 | |
1937 | bool isPrototypeContext() const { |
1938 | return (Context == DeclaratorContext::Prototype || |
1939 | Context == DeclaratorContext::ObjCParameter || |
1940 | Context == DeclaratorContext::ObjCResult || |
1941 | Context == DeclaratorContext::LambdaExprParameter); |
1942 | } |
1943 | |
1944 | /// Get the source range that spans this declarator. |
1945 | SourceRange getSourceRange() const LLVM_READONLY__attribute__((__pure__)) { return Range; } |
1946 | SourceLocation getBeginLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getBegin(); } |
1947 | SourceLocation getEndLoc() const LLVM_READONLY__attribute__((__pure__)) { return Range.getEnd(); } |
1948 | |
1949 | void SetSourceRange(SourceRange R) { Range = R; } |
1950 | /// SetRangeBegin - Set the start of the source range to Loc, unless it's |
1951 | /// invalid. |
1952 | void SetRangeBegin(SourceLocation Loc) { |
1953 | if (!Loc.isInvalid()) |
1954 | Range.setBegin(Loc); |
1955 | } |
1956 | /// SetRangeEnd - Set the end of the source range to Loc, unless it's invalid. |
1957 | void SetRangeEnd(SourceLocation Loc) { |
1958 | if (!Loc.isInvalid()) |
1959 | Range.setEnd(Loc); |
1960 | } |
1961 | /// ExtendWithDeclSpec - Extend the declarator source range to include the |
1962 | /// given declspec, unless its location is invalid. Adopts the range start if |
1963 | /// the current range start is invalid. |
1964 | void ExtendWithDeclSpec(const DeclSpec &DS) { |
1965 | SourceRange SR = DS.getSourceRange(); |
1966 | if (Range.getBegin().isInvalid()) |
1967 | Range.setBegin(SR.getBegin()); |
1968 | if (!SR.getEnd().isInvalid()) |
1969 | Range.setEnd(SR.getEnd()); |
1970 | } |
1971 | |
1972 | /// Reset the contents of this Declarator. |
1973 | void clear() { |
1974 | SS.clear(); |
1975 | Name.clear(); |
1976 | Range = DS.getSourceRange(); |
1977 | BindingGroup.clear(); |
1978 | |
1979 | for (unsigned i = 0, e = DeclTypeInfo.size(); i != e; ++i) |
1980 | DeclTypeInfo[i].destroy(); |
1981 | DeclTypeInfo.clear(); |
1982 | Attrs.clear(); |
1983 | AsmLabel = nullptr; |
1984 | InlineStorageUsed = false; |
1985 | HasInitializer = false; |
1986 | ObjCIvar = false; |
1987 | ObjCWeakProperty = false; |
1988 | CommaLoc = SourceLocation(); |
1989 | EllipsisLoc = SourceLocation(); |
1990 | } |
1991 | |
1992 | /// mayOmitIdentifier - Return true if the identifier is either optional or |
1993 | /// not allowed. This is true for typenames, prototypes, and template |
1994 | /// parameter lists. |
1995 | bool mayOmitIdentifier() const { |
1996 | switch (Context) { |
1997 | case DeclaratorContext::File: |
1998 | case DeclaratorContext::KNRTypeList: |
1999 | case DeclaratorContext::Member: |
2000 | case DeclaratorContext::Block: |
2001 | case DeclaratorContext::ForInit: |
2002 | case DeclaratorContext::SelectionInit: |
2003 | case DeclaratorContext::Condition: |
2004 | return false; |
2005 | |
2006 | case DeclaratorContext::TypeName: |
2007 | case DeclaratorContext::FunctionalCast: |
2008 | case DeclaratorContext::AliasDecl: |
2009 | case DeclaratorContext::AliasTemplate: |
2010 | case DeclaratorContext::Prototype: |
2011 | case DeclaratorContext::LambdaExprParameter: |
2012 | case DeclaratorContext::ObjCParameter: |
2013 | case DeclaratorContext::ObjCResult: |
2014 | case DeclaratorContext::TemplateParam: |
2015 | case DeclaratorContext::CXXNew: |
2016 | case DeclaratorContext::CXXCatch: |
2017 | case DeclaratorContext::ObjCCatch: |
2018 | case DeclaratorContext::BlockLiteral: |
2019 | case DeclaratorContext::LambdaExpr: |
2020 | case DeclaratorContext::ConversionId: |
2021 | case DeclaratorContext::TemplateArg: |
2022 | case DeclaratorContext::TemplateTypeArg: |
2023 | case DeclaratorContext::TrailingReturn: |
2024 | case DeclaratorContext::TrailingReturnVar: |
2025 | case DeclaratorContext::RequiresExpr: |
2026 | return true; |
2027 | } |
2028 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2028); |
2029 | } |
2030 | |
2031 | /// mayHaveIdentifier - Return true if the identifier is either optional or |
2032 | /// required. This is true for normal declarators and prototypes, but not |
2033 | /// typenames. |
2034 | bool mayHaveIdentifier() const { |
2035 | switch (Context) { |
2036 | case DeclaratorContext::File: |
2037 | case DeclaratorContext::KNRTypeList: |
2038 | case DeclaratorContext::Member: |
2039 | case DeclaratorContext::Block: |
2040 | case DeclaratorContext::ForInit: |
2041 | case DeclaratorContext::SelectionInit: |
2042 | case DeclaratorContext::Condition: |
2043 | case DeclaratorContext::Prototype: |
2044 | case DeclaratorContext::LambdaExprParameter: |
2045 | case DeclaratorContext::TemplateParam: |
2046 | case DeclaratorContext::CXXCatch: |
2047 | case DeclaratorContext::ObjCCatch: |
2048 | case DeclaratorContext::RequiresExpr: |
2049 | return true; |
2050 | |
2051 | case DeclaratorContext::TypeName: |
2052 | case DeclaratorContext::FunctionalCast: |
2053 | case DeclaratorContext::CXXNew: |
2054 | case DeclaratorContext::AliasDecl: |
2055 | case DeclaratorContext::AliasTemplate: |
2056 | case DeclaratorContext::ObjCParameter: |
2057 | case DeclaratorContext::ObjCResult: |
2058 | case DeclaratorContext::BlockLiteral: |
2059 | case DeclaratorContext::LambdaExpr: |
2060 | case DeclaratorContext::ConversionId: |
2061 | case DeclaratorContext::TemplateArg: |
2062 | case DeclaratorContext::TemplateTypeArg: |
2063 | case DeclaratorContext::TrailingReturn: |
2064 | case DeclaratorContext::TrailingReturnVar: |
2065 | return false; |
2066 | } |
2067 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2067); |
2068 | } |
2069 | |
2070 | /// Return true if the context permits a C++17 decomposition declarator. |
2071 | bool mayHaveDecompositionDeclarator() const { |
2072 | switch (Context) { |
2073 | case DeclaratorContext::File: |
2074 | // FIXME: It's not clear that the proposal meant to allow file-scope |
2075 | // structured bindings, but it does. |
2076 | case DeclaratorContext::Block: |
2077 | case DeclaratorContext::ForInit: |
2078 | case DeclaratorContext::SelectionInit: |
2079 | case DeclaratorContext::Condition: |
2080 | return true; |
2081 | |
2082 | case DeclaratorContext::Member: |
2083 | case DeclaratorContext::Prototype: |
2084 | case DeclaratorContext::TemplateParam: |
2085 | case DeclaratorContext::RequiresExpr: |
2086 | // Maybe one day... |
2087 | return false; |
2088 | |
2089 | // These contexts don't allow any kind of non-abstract declarator. |
2090 | case DeclaratorContext::KNRTypeList: |
2091 | case DeclaratorContext::TypeName: |
2092 | case DeclaratorContext::FunctionalCast: |
2093 | case DeclaratorContext::AliasDecl: |
2094 | case DeclaratorContext::AliasTemplate: |
2095 | case DeclaratorContext::LambdaExprParameter: |
2096 | case DeclaratorContext::ObjCParameter: |
2097 | case DeclaratorContext::ObjCResult: |
2098 | case DeclaratorContext::CXXNew: |
2099 | case DeclaratorContext::CXXCatch: |
2100 | case DeclaratorContext::ObjCCatch: |
2101 | case DeclaratorContext::BlockLiteral: |
2102 | case DeclaratorContext::LambdaExpr: |
2103 | case DeclaratorContext::ConversionId: |
2104 | case DeclaratorContext::TemplateArg: |
2105 | case DeclaratorContext::TemplateTypeArg: |
2106 | case DeclaratorContext::TrailingReturn: |
2107 | case DeclaratorContext::TrailingReturnVar: |
2108 | return false; |
2109 | } |
2110 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2110); |
2111 | } |
2112 | |
2113 | /// mayBeFollowedByCXXDirectInit - Return true if the declarator can be |
2114 | /// followed by a C++ direct initializer, e.g. "int x(1);". |
2115 | bool mayBeFollowedByCXXDirectInit() const { |
2116 | if (hasGroupingParens()) return false; |
2117 | |
2118 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
2119 | return false; |
2120 | |
2121 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_extern && |
2122 | Context != DeclaratorContext::File) |
2123 | return false; |
2124 | |
2125 | // Special names can't have direct initializers. |
2126 | if (Name.getKind() != UnqualifiedIdKind::IK_Identifier) |
2127 | return false; |
2128 | |
2129 | switch (Context) { |
2130 | case DeclaratorContext::File: |
2131 | case DeclaratorContext::Block: |
2132 | case DeclaratorContext::ForInit: |
2133 | case DeclaratorContext::SelectionInit: |
2134 | case DeclaratorContext::TrailingReturnVar: |
2135 | return true; |
2136 | |
2137 | case DeclaratorContext::Condition: |
2138 | // This may not be followed by a direct initializer, but it can't be a |
2139 | // function declaration either, and we'd prefer to perform a tentative |
2140 | // parse in order to produce the right diagnostic. |
2141 | return true; |
2142 | |
2143 | case DeclaratorContext::KNRTypeList: |
2144 | case DeclaratorContext::Member: |
2145 | case DeclaratorContext::Prototype: |
2146 | case DeclaratorContext::LambdaExprParameter: |
2147 | case DeclaratorContext::ObjCParameter: |
2148 | case DeclaratorContext::ObjCResult: |
2149 | case DeclaratorContext::TemplateParam: |
2150 | case DeclaratorContext::CXXCatch: |
2151 | case DeclaratorContext::ObjCCatch: |
2152 | case DeclaratorContext::TypeName: |
2153 | case DeclaratorContext::FunctionalCast: // FIXME |
2154 | case DeclaratorContext::CXXNew: |
2155 | case DeclaratorContext::AliasDecl: |
2156 | case DeclaratorContext::AliasTemplate: |
2157 | case DeclaratorContext::BlockLiteral: |
2158 | case DeclaratorContext::LambdaExpr: |
2159 | case DeclaratorContext::ConversionId: |
2160 | case DeclaratorContext::TemplateArg: |
2161 | case DeclaratorContext::TemplateTypeArg: |
2162 | case DeclaratorContext::TrailingReturn: |
2163 | case DeclaratorContext::RequiresExpr: |
2164 | return false; |
2165 | } |
2166 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2166); |
2167 | } |
2168 | |
2169 | /// isPastIdentifier - Return true if we have parsed beyond the point where |
2170 | /// the name would appear. (This may happen even if we haven't actually parsed |
2171 | /// a name, perhaps because this context doesn't require one.) |
2172 | bool isPastIdentifier() const { return Name.isValid(); } |
2173 | |
2174 | /// hasName - Whether this declarator has a name, which might be an |
2175 | /// identifier (accessible via getIdentifier()) or some kind of |
2176 | /// special C++ name (constructor, destructor, etc.), or a structured |
2177 | /// binding (which is not exactly a name, but occupies the same position). |
2178 | bool hasName() const { |
2179 | return Name.getKind() != UnqualifiedIdKind::IK_Identifier || |
2180 | Name.Identifier || isDecompositionDeclarator(); |
2181 | } |
2182 | |
2183 | /// Return whether this declarator is a decomposition declarator. |
2184 | bool isDecompositionDeclarator() const { |
2185 | return BindingGroup.isSet(); |
2186 | } |
2187 | |
2188 | IdentifierInfo *getIdentifier() const { |
2189 | if (Name.getKind() == UnqualifiedIdKind::IK_Identifier) |
2190 | return Name.Identifier; |
2191 | |
2192 | return nullptr; |
2193 | } |
2194 | SourceLocation getIdentifierLoc() const { return Name.StartLocation; } |
2195 | |
2196 | /// Set the name of this declarator to be the given identifier. |
2197 | void SetIdentifier(IdentifierInfo *Id, SourceLocation IdLoc) { |
2198 | Name.setIdentifier(Id, IdLoc); |
2199 | } |
2200 | |
2201 | /// Set the decomposition bindings for this declarator. |
2202 | void |
2203 | setDecompositionBindings(SourceLocation LSquareLoc, |
2204 | ArrayRef<DecompositionDeclarator::Binding> Bindings, |
2205 | SourceLocation RSquareLoc); |
2206 | |
2207 | /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to |
2208 | /// EndLoc, which should be the last token of the chunk. |
2209 | /// This function takes attrs by R-Value reference because it takes ownership |
2210 | /// of those attributes from the parameter. |
2211 | void AddTypeInfo(const DeclaratorChunk &TI, ParsedAttributes &&attrs, |
2212 | SourceLocation EndLoc) { |
2213 | DeclTypeInfo.push_back(TI); |
2214 | DeclTypeInfo.back().getAttrs().addAll(attrs.begin(), attrs.end()); |
2215 | getAttributePool().takeAllFrom(attrs.getPool()); |
2216 | |
2217 | if (!EndLoc.isInvalid()) |
2218 | SetRangeEnd(EndLoc); |
2219 | } |
2220 | |
2221 | /// AddTypeInfo - Add a chunk to this declarator. Also extend the range to |
2222 | /// EndLoc, which should be the last token of the chunk. |
2223 | void AddTypeInfo(const DeclaratorChunk &TI, SourceLocation EndLoc) { |
2224 | DeclTypeInfo.push_back(TI); |
2225 | |
2226 | if (!EndLoc.isInvalid()) |
2227 | SetRangeEnd(EndLoc); |
2228 | } |
2229 | |
2230 | /// Add a new innermost chunk to this declarator. |
2231 | void AddInnermostTypeInfo(const DeclaratorChunk &TI) { |
2232 | DeclTypeInfo.insert(DeclTypeInfo.begin(), TI); |
2233 | } |
2234 | |
2235 | /// Return the number of types applied to this declarator. |
2236 | unsigned getNumTypeObjects() const { return DeclTypeInfo.size(); } |
2237 | |
2238 | /// Return the specified TypeInfo from this declarator. TypeInfo #0 is |
2239 | /// closest to the identifier. |
2240 | const DeclaratorChunk &getTypeObject(unsigned i) const { |
2241 | assert(i < DeclTypeInfo.size() && "Invalid type chunk")(static_cast <bool> (i < DeclTypeInfo.size() && "Invalid type chunk") ? void (0) : __assert_fail ("i < DeclTypeInfo.size() && \"Invalid type chunk\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2241, __extension__ __PRETTY_FUNCTION__)); |
2242 | return DeclTypeInfo[i]; |
2243 | } |
2244 | DeclaratorChunk &getTypeObject(unsigned i) { |
2245 | assert(i < DeclTypeInfo.size() && "Invalid type chunk")(static_cast <bool> (i < DeclTypeInfo.size() && "Invalid type chunk") ? void (0) : __assert_fail ("i < DeclTypeInfo.size() && \"Invalid type chunk\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2245, __extension__ __PRETTY_FUNCTION__)); |
2246 | return DeclTypeInfo[i]; |
2247 | } |
2248 | |
2249 | typedef SmallVectorImpl<DeclaratorChunk>::const_iterator type_object_iterator; |
2250 | typedef llvm::iterator_range<type_object_iterator> type_object_range; |
2251 | |
2252 | /// Returns the range of type objects, from the identifier outwards. |
2253 | type_object_range type_objects() const { |
2254 | return type_object_range(DeclTypeInfo.begin(), DeclTypeInfo.end()); |
2255 | } |
2256 | |
2257 | void DropFirstTypeObject() { |
2258 | assert(!DeclTypeInfo.empty() && "No type chunks to drop.")(static_cast <bool> (!DeclTypeInfo.empty() && "No type chunks to drop." ) ? void (0) : __assert_fail ("!DeclTypeInfo.empty() && \"No type chunks to drop.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2258, __extension__ __PRETTY_FUNCTION__)); |
2259 | DeclTypeInfo.front().destroy(); |
2260 | DeclTypeInfo.erase(DeclTypeInfo.begin()); |
2261 | } |
2262 | |
2263 | /// Return the innermost (closest to the declarator) chunk of this |
2264 | /// declarator that is not a parens chunk, or null if there are no |
2265 | /// non-parens chunks. |
2266 | const DeclaratorChunk *getInnermostNonParenChunk() const { |
2267 | for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) { |
2268 | if (!DeclTypeInfo[i].isParen()) |
2269 | return &DeclTypeInfo[i]; |
2270 | } |
2271 | return nullptr; |
2272 | } |
2273 | |
2274 | /// Return the outermost (furthest from the declarator) chunk of |
2275 | /// this declarator that is not a parens chunk, or null if there are |
2276 | /// no non-parens chunks. |
2277 | const DeclaratorChunk *getOutermostNonParenChunk() const { |
2278 | for (unsigned i = DeclTypeInfo.size(), i_end = 0; i != i_end; --i) { |
2279 | if (!DeclTypeInfo[i-1].isParen()) |
2280 | return &DeclTypeInfo[i-1]; |
2281 | } |
2282 | return nullptr; |
2283 | } |
2284 | |
2285 | /// isArrayOfUnknownBound - This method returns true if the declarator |
2286 | /// is a declarator for an array of unknown bound (looking through |
2287 | /// parentheses). |
2288 | bool isArrayOfUnknownBound() const { |
2289 | const DeclaratorChunk *chunk = getInnermostNonParenChunk(); |
2290 | return (chunk && chunk->Kind == DeclaratorChunk::Array && |
2291 | !chunk->Arr.NumElts); |
2292 | } |
2293 | |
2294 | /// isFunctionDeclarator - This method returns true if the declarator |
2295 | /// is a function declarator (looking through parentheses). |
2296 | /// If true is returned, then the reference type parameter idx is |
2297 | /// assigned with the index of the declaration chunk. |
2298 | bool isFunctionDeclarator(unsigned& idx) const { |
2299 | for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) { |
2300 | switch (DeclTypeInfo[i].Kind) { |
2301 | case DeclaratorChunk::Function: |
2302 | idx = i; |
2303 | return true; |
2304 | case DeclaratorChunk::Paren: |
2305 | continue; |
2306 | case DeclaratorChunk::Pointer: |
2307 | case DeclaratorChunk::Reference: |
2308 | case DeclaratorChunk::Array: |
2309 | case DeclaratorChunk::BlockPointer: |
2310 | case DeclaratorChunk::MemberPointer: |
2311 | case DeclaratorChunk::Pipe: |
2312 | return false; |
2313 | } |
2314 | llvm_unreachable("Invalid type chunk")::llvm::llvm_unreachable_internal("Invalid type chunk", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2314); |
2315 | } |
2316 | return false; |
2317 | } |
2318 | |
2319 | /// isFunctionDeclarator - Once this declarator is fully parsed and formed, |
2320 | /// this method returns true if the identifier is a function declarator |
2321 | /// (looking through parentheses). |
2322 | bool isFunctionDeclarator() const { |
2323 | unsigned index; |
2324 | return isFunctionDeclarator(index); |
2325 | } |
2326 | |
2327 | /// getFunctionTypeInfo - Retrieves the function type info object |
2328 | /// (looking through parentheses). |
2329 | DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() { |
2330 | assert(isFunctionDeclarator() && "Not a function declarator!")(static_cast <bool> (isFunctionDeclarator() && "Not a function declarator!" ) ? void (0) : __assert_fail ("isFunctionDeclarator() && \"Not a function declarator!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2330, __extension__ __PRETTY_FUNCTION__)); |
2331 | unsigned index = 0; |
2332 | isFunctionDeclarator(index); |
2333 | return DeclTypeInfo[index].Fun; |
2334 | } |
2335 | |
2336 | /// getFunctionTypeInfo - Retrieves the function type info object |
2337 | /// (looking through parentheses). |
2338 | const DeclaratorChunk::FunctionTypeInfo &getFunctionTypeInfo() const { |
2339 | return const_cast<Declarator*>(this)->getFunctionTypeInfo(); |
2340 | } |
2341 | |
2342 | /// Determine whether the declaration that will be produced from |
2343 | /// this declaration will be a function. |
2344 | /// |
2345 | /// A declaration can declare a function even if the declarator itself |
2346 | /// isn't a function declarator, if the type specifier refers to a function |
2347 | /// type. This routine checks for both cases. |
2348 | bool isDeclarationOfFunction() const; |
2349 | |
2350 | /// Return true if this declaration appears in a context where a |
2351 | /// function declarator would be a function declaration. |
2352 | bool isFunctionDeclarationContext() const { |
2353 | if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef) |
2354 | return false; |
2355 | |
2356 | switch (Context) { |
2357 | case DeclaratorContext::File: |
2358 | case DeclaratorContext::Member: |
2359 | case DeclaratorContext::Block: |
2360 | case DeclaratorContext::ForInit: |
2361 | case DeclaratorContext::SelectionInit: |
2362 | return true; |
2363 | |
2364 | case DeclaratorContext::Condition: |
2365 | case DeclaratorContext::KNRTypeList: |
2366 | case DeclaratorContext::TypeName: |
2367 | case DeclaratorContext::FunctionalCast: |
2368 | case DeclaratorContext::AliasDecl: |
2369 | case DeclaratorContext::AliasTemplate: |
2370 | case DeclaratorContext::Prototype: |
2371 | case DeclaratorContext::LambdaExprParameter: |
2372 | case DeclaratorContext::ObjCParameter: |
2373 | case DeclaratorContext::ObjCResult: |
2374 | case DeclaratorContext::TemplateParam: |
2375 | case DeclaratorContext::CXXNew: |
2376 | case DeclaratorContext::CXXCatch: |
2377 | case DeclaratorContext::ObjCCatch: |
2378 | case DeclaratorContext::BlockLiteral: |
2379 | case DeclaratorContext::LambdaExpr: |
2380 | case DeclaratorContext::ConversionId: |
2381 | case DeclaratorContext::TemplateArg: |
2382 | case DeclaratorContext::TemplateTypeArg: |
2383 | case DeclaratorContext::TrailingReturn: |
2384 | case DeclaratorContext::TrailingReturnVar: |
2385 | case DeclaratorContext::RequiresExpr: |
2386 | return false; |
2387 | } |
2388 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2388); |
2389 | } |
2390 | |
2391 | /// Determine whether this declaration appears in a context where an |
2392 | /// expression could appear. |
2393 | bool isExpressionContext() const { |
2394 | switch (Context) { |
2395 | case DeclaratorContext::File: |
2396 | case DeclaratorContext::KNRTypeList: |
2397 | case DeclaratorContext::Member: |
2398 | |
2399 | // FIXME: sizeof(...) permits an expression. |
2400 | case DeclaratorContext::TypeName: |
2401 | |
2402 | case DeclaratorContext::FunctionalCast: |
2403 | case DeclaratorContext::AliasDecl: |
2404 | case DeclaratorContext::AliasTemplate: |
2405 | case DeclaratorContext::Prototype: |
2406 | case DeclaratorContext::LambdaExprParameter: |
2407 | case DeclaratorContext::ObjCParameter: |
2408 | case DeclaratorContext::ObjCResult: |
2409 | case DeclaratorContext::TemplateParam: |
2410 | case DeclaratorContext::CXXNew: |
2411 | case DeclaratorContext::CXXCatch: |
2412 | case DeclaratorContext::ObjCCatch: |
2413 | case DeclaratorContext::BlockLiteral: |
2414 | case DeclaratorContext::LambdaExpr: |
2415 | case DeclaratorContext::ConversionId: |
2416 | case DeclaratorContext::TrailingReturn: |
2417 | case DeclaratorContext::TrailingReturnVar: |
2418 | case DeclaratorContext::TemplateTypeArg: |
2419 | case DeclaratorContext::RequiresExpr: |
2420 | return false; |
2421 | |
2422 | case DeclaratorContext::Block: |
2423 | case DeclaratorContext::ForInit: |
2424 | case DeclaratorContext::SelectionInit: |
2425 | case DeclaratorContext::Condition: |
2426 | case DeclaratorContext::TemplateArg: |
2427 | return true; |
2428 | } |
2429 | |
2430 | llvm_unreachable("unknown context kind!")::llvm::llvm_unreachable_internal("unknown context kind!", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Sema/DeclSpec.h" , 2430); |
2431 | } |
2432 | |
2433 | /// Return true if a function declarator at this position would be a |
2434 | /// function declaration. |
2435 | bool isFunctionDeclaratorAFunctionDeclaration() const { |
2436 | if (!isFunctionDeclarationContext()) |
2437 | return false; |
2438 | |
2439 | for (unsigned I = 0, N = getNumTypeObjects(); I != N; ++I) |
2440 | if (getTypeObject(I).Kind != DeclaratorChunk::Paren) |
2441 | return false; |
2442 | |
2443 | return true; |
2444 | } |
2445 | |
2446 | /// Determine whether a trailing return type was written (at any |
2447 | /// level) within this declarator. |
2448 | bool hasTrailingReturnType() const { |
2449 | for (const auto &Chunk : type_objects()) |
2450 | if (Chunk.Kind == DeclaratorChunk::Function && |
2451 | Chunk.Fun.hasTrailingReturnType()) |
2452 | return true; |
2453 | return false; |
2454 | } |
2455 | /// Get the trailing return type appearing (at any level) within this |
2456 | /// declarator. |
2457 | ParsedType getTrailingReturnType() const { |
2458 | for (const auto &Chunk : type_objects()) |
2459 | if (Chunk.Kind == DeclaratorChunk::Function && |
2460 | Chunk.Fun.hasTrailingReturnType()) |
2461 | return Chunk.Fun.getTrailingReturnType(); |
2462 | return ParsedType(); |
2463 | } |
2464 | |
2465 | /// \brief Sets a trailing requires clause for this declarator. |
2466 | void setTrailingRequiresClause(Expr *TRC) { |
2467 | TrailingRequiresClause = TRC; |
2468 | |
2469 | SetRangeEnd(TRC->getEndLoc()); |
2470 | } |
2471 | |
2472 | /// \brief Sets a trailing requires clause for this declarator. |
2473 | Expr *getTrailingRequiresClause() { |
2474 | return TrailingRequiresClause; |
2475 | } |
2476 | |
2477 | /// \brief Determine whether a trailing requires clause was written in this |
2478 | /// declarator. |
2479 | bool hasTrailingRequiresClause() const { |
2480 | return TrailingRequiresClause != nullptr; |
2481 | } |
2482 | |
2483 | /// Sets the template parameter lists that preceded the declarator. |
2484 | void setTemplateParameterLists(ArrayRef<TemplateParameterList *> TPLs) { |
2485 | TemplateParameterLists = TPLs; |
2486 | } |
2487 | |
2488 | /// The template parameter lists that preceded the declarator. |
2489 | ArrayRef<TemplateParameterList *> getTemplateParameterLists() const { |
2490 | return TemplateParameterLists; |
2491 | } |
2492 | |
2493 | /// Sets the template parameter list generated from the explicit template |
2494 | /// parameters along with any invented template parameters from |
2495 | /// placeholder-typed parameters. |
2496 | void setInventedTemplateParameterList(TemplateParameterList *Invented) { |
2497 | InventedTemplateParameterList = Invented; |
2498 | } |
2499 | |
2500 | /// The template parameter list generated from the explicit template |
2501 | /// parameters along with any invented template parameters from |
2502 | /// placeholder-typed parameters, if there were any such parameters. |
2503 | TemplateParameterList * getInventedTemplateParameterList() const { |
2504 | return InventedTemplateParameterList; |
2505 | } |
2506 | |
2507 | /// takeAttributes - Takes attributes from the given parsed-attributes |
2508 | /// set and add them to this declarator. |
2509 | /// |
2510 | /// These examples both add 3 attributes to "var": |
2511 | /// short int var __attribute__((aligned(16),common,deprecated)); |
2512 | /// short int x, __attribute__((aligned(16)) var |
2513 | /// __attribute__((common,deprecated)); |
2514 | /// |
2515 | /// Also extends the range of the declarator. |
2516 | void takeAttributes(ParsedAttributes &attrs, SourceLocation lastLoc) { |
2517 | Attrs.takeAllFrom(attrs); |
2518 | |
2519 | if (!lastLoc.isInvalid()) |
2520 | SetRangeEnd(lastLoc); |
2521 | } |
2522 | |
2523 | const ParsedAttributes &getAttributes() const { return Attrs; } |
2524 | ParsedAttributes &getAttributes() { return Attrs; } |
2525 | |
2526 | /// hasAttributes - do we contain any attributes? |
2527 | bool hasAttributes() const { |
2528 | if (!getAttributes().empty() || getDeclSpec().hasAttributes()) |
2529 | return true; |
2530 | for (unsigned i = 0, e = getNumTypeObjects(); i != e; ++i) |
2531 | if (!getTypeObject(i).getAttrs().empty()) |
2532 | return true; |
2533 | return false; |
2534 | } |
2535 | |
2536 | /// Return a source range list of C++11 attributes associated |
2537 | /// with the declarator. |
2538 | void getCXX11AttributeRanges(SmallVectorImpl<SourceRange> &Ranges) { |
2539 | for (const ParsedAttr &AL : Attrs) |
2540 | if (AL.isCXX11Attribute()) |
2541 | Ranges.push_back(AL.getRange()); |
2542 | } |
2543 | |
2544 | void setAsmLabel(Expr *E) { AsmLabel = E; } |
2545 | Expr *getAsmLabel() const { return AsmLabel; } |
2546 | |
2547 | void setExtension(bool Val = true) { Extension = Val; } |
2548 | bool getExtension() const { return Extension; } |
2549 | |
2550 | void setObjCIvar(bool Val = true) { ObjCIvar = Val; } |
2551 | bool isObjCIvar() const { return ObjCIvar; } |
2552 | |
2553 | void setObjCWeakProperty(bool Val = true) { ObjCWeakProperty = Val; } |
2554 | bool isObjCWeakProperty() const { return ObjCWeakProperty; } |
2555 | |
2556 | void setInvalidType(bool Val = true) { InvalidType = Val; } |
2557 | bool isInvalidType() const { |
2558 | return InvalidType || DS.getTypeSpecType() == DeclSpec::TST_error; |
2559 | } |
2560 | |
2561 | void setGroupingParens(bool flag) { GroupingParens = flag; } |
2562 | bool hasGroupingParens() const { return GroupingParens; } |
2563 | |
2564 | bool isFirstDeclarator() const { return !CommaLoc.isValid(); } |
2565 | SourceLocation getCommaLoc() const { return CommaLoc; } |
2566 | void setCommaLoc(SourceLocation CL) { CommaLoc = CL; } |
2567 | |
2568 | bool hasEllipsis() const { return EllipsisLoc.isValid(); } |
2569 | SourceLocation getEllipsisLoc() const { return EllipsisLoc; } |
2570 | void setEllipsisLoc(SourceLocation EL) { EllipsisLoc = EL; } |
2571 | |
2572 | void setFunctionDefinitionKind(FunctionDefinitionKind Val) { |
2573 | FunctionDefinition = static_cast<unsigned>(Val); |
2574 | } |
2575 | |
2576 | bool isFunctionDefinition() const { |
2577 | return getFunctionDefinitionKind() != FunctionDefinitionKind::Declaration; |
2578 | } |
2579 | |
2580 | FunctionDefinitionKind getFunctionDefinitionKind() const { |
2581 | return (FunctionDefinitionKind)FunctionDefinition; |
2582 | } |
2583 | |
2584 | void setHasInitializer(bool Val = true) { HasInitializer = Val; } |
2585 | bool hasInitializer() const { return HasInitializer; } |
2586 | |
2587 | /// Returns true if this declares a real member and not a friend. |
2588 | bool isFirstDeclarationOfMember() { |
2589 | return getContext() == DeclaratorContext::Member && |
2590 | !getDeclSpec().isFriendSpecified(); |
2591 | } |
2592 | |
2593 | /// Returns true if this declares a static member. This cannot be called on a |
2594 | /// declarator outside of a MemberContext because we won't know until |
2595 | /// redeclaration time if the decl is static. |
2596 | bool isStaticMember(); |
2597 | |
2598 | /// Returns true if this declares a constructor or a destructor. |
2599 | bool isCtorOrDtor(); |
2600 | |
2601 | void setRedeclaration(bool Val) { Redeclaration = Val; } |
2602 | bool isRedeclaration() const { return Redeclaration; } |
2603 | }; |
2604 | |
2605 | /// This little struct is used to capture information about |
2606 | /// structure field declarators, which is basically just a bitfield size. |
2607 | struct FieldDeclarator { |
2608 | Declarator D; |
2609 | Expr *BitfieldSize; |
2610 | explicit FieldDeclarator(const DeclSpec &DS) |
2611 | : D(DS, DeclaratorContext::Member), BitfieldSize(nullptr) {} |
2612 | }; |
2613 | |
2614 | /// Represents a C++11 virt-specifier-seq. |
2615 | class VirtSpecifiers { |
2616 | public: |
2617 | enum Specifier { |
2618 | VS_None = 0, |
2619 | VS_Override = 1, |
2620 | VS_Final = 2, |
2621 | VS_Sealed = 4, |
2622 | // Represents the __final keyword, which is legal for gcc in pre-C++11 mode. |
2623 | VS_GNU_Final = 8, |
2624 | VS_Abstract = 16 |
2625 | }; |
2626 | |
2627 | VirtSpecifiers() : Specifiers(0), LastSpecifier(VS_None) { } |
2628 | |
2629 | bool SetSpecifier(Specifier VS, SourceLocation Loc, |
2630 | const char *&PrevSpec); |
2631 | |
2632 | bool isUnset() const { return Specifiers == 0; } |
2633 | |
2634 | bool isOverrideSpecified() const { return Specifiers & VS_Override; } |
2635 | SourceLocation getOverrideLoc() const { return VS_overrideLoc; } |
2636 | |
2637 | bool isFinalSpecified() const { return Specifiers & (VS_Final | VS_Sealed | VS_GNU_Final); } |
2638 | bool isFinalSpelledSealed() const { return Specifiers & VS_Sealed; } |
2639 | SourceLocation getFinalLoc() const { return VS_finalLoc; } |
2640 | SourceLocation getAbstractLoc() const { return VS_abstractLoc; } |
2641 | |
2642 | void clear() { Specifiers = 0; } |
2643 | |
2644 | static const char *getSpecifierName(Specifier VS); |
2645 | |
2646 | SourceLocation getFirstLocation() const { return FirstLocation; } |
2647 | SourceLocation getLastLocation() const { return LastLocation; } |
2648 | Specifier getLastSpecifier() const { return LastSpecifier; } |
2649 | |
2650 | private: |
2651 | unsigned Specifiers; |
2652 | Specifier LastSpecifier; |
2653 | |
2654 | SourceLocation VS_overrideLoc, VS_finalLoc, VS_abstractLoc; |
2655 | SourceLocation FirstLocation; |
2656 | SourceLocation LastLocation; |
2657 | }; |
2658 | |
2659 | enum class LambdaCaptureInitKind { |
2660 | NoInit, //!< [a] |
2661 | CopyInit, //!< [a = b], [a = {b}] |
2662 | DirectInit, //!< [a(b)] |
2663 | ListInit //!< [a{b}] |
2664 | }; |
2665 | |
2666 | /// Represents a complete lambda introducer. |
2667 | struct LambdaIntroducer { |
2668 | /// An individual capture in a lambda introducer. |
2669 | struct LambdaCapture { |
2670 | LambdaCaptureKind Kind; |
2671 | SourceLocation Loc; |
2672 | IdentifierInfo *Id; |
2673 | SourceLocation EllipsisLoc; |
2674 | LambdaCaptureInitKind InitKind; |
2675 | ExprResult Init; |
2676 | ParsedType InitCaptureType; |
2677 | SourceRange ExplicitRange; |
2678 | |
2679 | LambdaCapture(LambdaCaptureKind Kind, SourceLocation Loc, |
2680 | IdentifierInfo *Id, SourceLocation EllipsisLoc, |
2681 | LambdaCaptureInitKind InitKind, ExprResult Init, |
2682 | ParsedType InitCaptureType, |
2683 | SourceRange ExplicitRange) |
2684 | : Kind(Kind), Loc(Loc), Id(Id), EllipsisLoc(EllipsisLoc), |
2685 | InitKind(InitKind), Init(Init), InitCaptureType(InitCaptureType), |
2686 | ExplicitRange(ExplicitRange) {} |
2687 | }; |
2688 | |
2689 | SourceRange Range; |
2690 | SourceLocation DefaultLoc; |
2691 | LambdaCaptureDefault Default; |
2692 | SmallVector<LambdaCapture, 4> Captures; |
2693 | |
2694 | LambdaIntroducer() |
2695 | : Default(LCD_None) {} |
2696 | |
2697 | /// Append a capture in a lambda introducer. |
2698 | void addCapture(LambdaCaptureKind Kind, |
2699 | SourceLocation Loc, |
2700 | IdentifierInfo* Id, |
2701 | SourceLocation EllipsisLoc, |
2702 | LambdaCaptureInitKind InitKind, |
2703 | ExprResult Init, |
2704 | ParsedType InitCaptureType, |
2705 | SourceRange ExplicitRange) { |
2706 | Captures.push_back(LambdaCapture(Kind, Loc, Id, EllipsisLoc, InitKind, Init, |
2707 | InitCaptureType, ExplicitRange)); |
2708 | } |
2709 | }; |
2710 | |
2711 | struct InventedTemplateParameterInfo { |
2712 | /// The number of parameters in the template parameter list that were |
2713 | /// explicitly specified by the user, as opposed to being invented by use |
2714 | /// of an auto parameter. |
2715 | unsigned NumExplicitTemplateParams = 0; |
2716 | |
2717 | /// If this is a generic lambda or abbreviated function template, use this |
2718 | /// as the depth of each 'auto' parameter, during initial AST construction. |
2719 | unsigned AutoTemplateParameterDepth = 0; |
2720 | |
2721 | /// Store the list of the template parameters for a generic lambda or an |
2722 | /// abbreviated function template. |
2723 | /// If this is a generic lambda or abbreviated function template, this holds |
2724 | /// the explicit template parameters followed by the auto parameters |
2725 | /// converted into TemplateTypeParmDecls. |
2726 | /// It can be used to construct the generic lambda or abbreviated template's |
2727 | /// template parameter list during initial AST construction. |
2728 | SmallVector<NamedDecl*, 4> TemplateParams; |
2729 | }; |
2730 | |
2731 | } // end namespace clang |
2732 | |
2733 | #endif // LLVM_CLANG_SEMA_DECLSPEC_H |
1 | //===- SourceLocation.h - Compact identifier for Source Files ---*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | /// \file |
10 | /// Defines the clang::SourceLocation class and associated facilities. |
11 | // |
12 | //===----------------------------------------------------------------------===// |
13 | |
14 | #ifndef LLVM_CLANG_BASIC_SOURCELOCATION_H |
15 | #define LLVM_CLANG_BASIC_SOURCELOCATION_H |
16 | |
17 | #include "clang/Basic/LLVM.h" |
18 | #include "llvm/ADT/StringRef.h" |
19 | #include <cassert> |
20 | #include <cstdint> |
21 | #include <string> |
22 | #include <utility> |
23 | |
24 | namespace llvm { |
25 | |
26 | template <typename T> struct DenseMapInfo; |
27 | |
28 | class FoldingSetNodeID; |
29 | template <typename T> struct FoldingSetTrait; |
30 | |
31 | } // namespace llvm |
32 | |
33 | namespace clang { |
34 | |
35 | class SourceManager; |
36 | |
37 | /// An opaque identifier used by SourceManager which refers to a |
38 | /// source file (MemoryBuffer) along with its \#include path and \#line data. |
39 | /// |
40 | class FileID { |
41 | /// A mostly-opaque identifier, where 0 is "invalid", >0 is |
42 | /// this module, and <-1 is something loaded from another module. |
43 | int ID = 0; |
44 | |
45 | public: |
46 | bool isValid() const { return ID != 0; } |
47 | bool isInvalid() const { return ID == 0; } |
48 | |
49 | bool operator==(const FileID &RHS) const { return ID == RHS.ID; } |
50 | bool operator<(const FileID &RHS) const { return ID < RHS.ID; } |
51 | bool operator<=(const FileID &RHS) const { return ID <= RHS.ID; } |
52 | bool operator!=(const FileID &RHS) const { return !(*this == RHS); } |
53 | bool operator>(const FileID &RHS) const { return RHS < *this; } |
54 | bool operator>=(const FileID &RHS) const { return RHS <= *this; } |
55 | |
56 | static FileID getSentinel() { return get(-1); } |
57 | unsigned getHashValue() const { return static_cast<unsigned>(ID); } |
58 | |
59 | private: |
60 | friend class ASTWriter; |
61 | friend class ASTReader; |
62 | friend class SourceManager; |
63 | |
64 | static FileID get(int V) { |
65 | FileID F; |
66 | F.ID = V; |
67 | return F; |
68 | } |
69 | |
70 | int getOpaqueValue() const { return ID; } |
71 | }; |
72 | |
73 | /// Encodes a location in the source. The SourceManager can decode this |
74 | /// to get at the full include stack, line and column information. |
75 | /// |
76 | /// Technically, a source location is simply an offset into the manager's view |
77 | /// of the input source, which is all input buffers (including macro |
78 | /// expansions) concatenated in an effectively arbitrary order. The manager |
79 | /// actually maintains two blocks of input buffers. One, starting at offset |
80 | /// 0 and growing upwards, contains all buffers from this module. The other, |
81 | /// starting at the highest possible offset and growing downwards, contains |
82 | /// buffers of loaded modules. |
83 | /// |
84 | /// In addition, one bit of SourceLocation is used for quick access to the |
85 | /// information whether the location is in a file or a macro expansion. |
86 | /// |
87 | /// It is important that this type remains small. It is currently 32 bits wide. |
88 | class SourceLocation { |
89 | friend class ASTReader; |
90 | friend class ASTWriter; |
91 | friend class SourceManager; |
92 | friend struct llvm::FoldingSetTrait<SourceLocation>; |
93 | |
94 | public: |
95 | using UIntTy = uint32_t; |
96 | using IntTy = int32_t; |
97 | |
98 | private: |
99 | UIntTy ID = 0; |
100 | |
101 | enum : UIntTy { MacroIDBit = 1ULL << (8 * sizeof(UIntTy) - 1) }; |
102 | |
103 | public: |
104 | bool isFileID() const { return (ID & MacroIDBit) == 0; } |
105 | bool isMacroID() const { return (ID & MacroIDBit) != 0; } |
106 | |
107 | /// Return true if this is a valid SourceLocation object. |
108 | /// |
109 | /// Invalid SourceLocations are often used when events have no corresponding |
110 | /// location in the source (e.g. a diagnostic is required for a command line |
111 | /// option). |
112 | bool isValid() const { return ID != 0; } |
113 | bool isInvalid() const { return ID == 0; } |
114 | |
115 | private: |
116 | /// Return the offset into the manager's global input view. |
117 | UIntTy getOffset() const { return ID & ~MacroIDBit; } |
118 | |
119 | static SourceLocation getFileLoc(UIntTy ID) { |
120 | assert((ID & MacroIDBit) == 0 && "Ran out of source locations!")(static_cast <bool> ((ID & MacroIDBit) == 0 && "Ran out of source locations!") ? void (0) : __assert_fail ( "(ID & MacroIDBit) == 0 && \"Ran out of source locations!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 120, __extension__ __PRETTY_FUNCTION__)); |
121 | SourceLocation L; |
122 | L.ID = ID; |
123 | return L; |
124 | } |
125 | |
126 | static SourceLocation getMacroLoc(UIntTy ID) { |
127 | assert((ID & MacroIDBit) == 0 && "Ran out of source locations!")(static_cast <bool> ((ID & MacroIDBit) == 0 && "Ran out of source locations!") ? void (0) : __assert_fail ( "(ID & MacroIDBit) == 0 && \"Ran out of source locations!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 127, __extension__ __PRETTY_FUNCTION__)); |
128 | SourceLocation L; |
129 | L.ID = MacroIDBit | ID; |
130 | return L; |
131 | } |
132 | |
133 | public: |
134 | /// Return a source location with the specified offset from this |
135 | /// SourceLocation. |
136 | SourceLocation getLocWithOffset(IntTy Offset) const { |
137 | assert(((getOffset()+Offset) & MacroIDBit) == 0 && "offset overflow")(static_cast <bool> (((getOffset()+Offset) & MacroIDBit ) == 0 && "offset overflow") ? void (0) : __assert_fail ("((getOffset()+Offset) & MacroIDBit) == 0 && \"offset overflow\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 137, __extension__ __PRETTY_FUNCTION__)); |
138 | SourceLocation L; |
139 | L.ID = ID+Offset; |
140 | return L; |
141 | } |
142 | |
143 | /// When a SourceLocation itself cannot be used, this returns |
144 | /// an (opaque) 32-bit integer encoding for it. |
145 | /// |
146 | /// This should only be passed to SourceLocation::getFromRawEncoding, it |
147 | /// should not be inspected directly. |
148 | UIntTy getRawEncoding() const { return ID; } |
149 | |
150 | /// Turn a raw encoding of a SourceLocation object into |
151 | /// a real SourceLocation. |
152 | /// |
153 | /// \see getRawEncoding. |
154 | static SourceLocation getFromRawEncoding(UIntTy Encoding) { |
155 | SourceLocation X; |
156 | X.ID = Encoding; |
157 | return X; |
158 | } |
159 | |
160 | /// When a SourceLocation itself cannot be used, this returns |
161 | /// an (opaque) pointer encoding for it. |
162 | /// |
163 | /// This should only be passed to SourceLocation::getFromPtrEncoding, it |
164 | /// should not be inspected directly. |
165 | void* getPtrEncoding() const { |
166 | // Double cast to avoid a warning "cast to pointer from integer of different |
167 | // size". |
168 | return (void*)(uintptr_t)getRawEncoding(); |
169 | } |
170 | |
171 | /// Turn a pointer encoding of a SourceLocation object back |
172 | /// into a real SourceLocation. |
173 | static SourceLocation getFromPtrEncoding(const void *Encoding) { |
174 | return getFromRawEncoding((SourceLocation::UIntTy)(uintptr_t)Encoding); |
175 | } |
176 | |
177 | static bool isPairOfFileLocations(SourceLocation Start, SourceLocation End) { |
178 | return Start.isValid() && Start.isFileID() && End.isValid() && |
179 | End.isFileID(); |
180 | } |
181 | |
182 | unsigned getHashValue() const; |
183 | void print(raw_ostream &OS, const SourceManager &SM) const; |
184 | std::string printToString(const SourceManager &SM) const; |
185 | void dump(const SourceManager &SM) const; |
186 | }; |
187 | |
188 | inline bool operator==(const SourceLocation &LHS, const SourceLocation &RHS) { |
189 | return LHS.getRawEncoding() == RHS.getRawEncoding(); |
190 | } |
191 | |
192 | inline bool operator!=(const SourceLocation &LHS, const SourceLocation &RHS) { |
193 | return !(LHS == RHS); |
194 | } |
195 | |
196 | // Ordering is meaningful only if LHS and RHS have the same FileID! |
197 | // Otherwise use SourceManager::isBeforeInTranslationUnit(). |
198 | inline bool operator<(const SourceLocation &LHS, const SourceLocation &RHS) { |
199 | return LHS.getRawEncoding() < RHS.getRawEncoding(); |
200 | } |
201 | inline bool operator>(const SourceLocation &LHS, const SourceLocation &RHS) { |
202 | return LHS.getRawEncoding() > RHS.getRawEncoding(); |
203 | } |
204 | inline bool operator<=(const SourceLocation &LHS, const SourceLocation &RHS) { |
205 | return LHS.getRawEncoding() <= RHS.getRawEncoding(); |
206 | } |
207 | inline bool operator>=(const SourceLocation &LHS, const SourceLocation &RHS) { |
208 | return LHS.getRawEncoding() >= RHS.getRawEncoding(); |
209 | } |
210 | |
211 | /// A trivial tuple used to represent a source range. |
212 | class SourceRange { |
213 | SourceLocation B; |
214 | SourceLocation E; |
215 | |
216 | public: |
217 | SourceRange() = default; |
218 | SourceRange(SourceLocation loc) : B(loc), E(loc) {} |
219 | SourceRange(SourceLocation begin, SourceLocation end) : B(begin), E(end) {} |
220 | |
221 | SourceLocation getBegin() const { return B; } |
222 | SourceLocation getEnd() const { return E; } |
223 | |
224 | void setBegin(SourceLocation b) { B = b; } |
225 | void setEnd(SourceLocation e) { E = e; } |
226 | |
227 | bool isValid() const { return B.isValid() && E.isValid(); } |
228 | bool isInvalid() const { return !isValid(); } |
229 | |
230 | bool operator==(const SourceRange &X) const { |
231 | return B == X.B && E == X.E; |
232 | } |
233 | |
234 | bool operator!=(const SourceRange &X) const { |
235 | return B != X.B || E != X.E; |
236 | } |
237 | |
238 | // Returns true iff other is wholly contained within this range. |
239 | bool fullyContains(const SourceRange &other) const { |
240 | return B <= other.B && E >= other.E; |
241 | } |
242 | |
243 | void print(raw_ostream &OS, const SourceManager &SM) const; |
244 | std::string printToString(const SourceManager &SM) const; |
245 | void dump(const SourceManager &SM) const; |
246 | }; |
247 | |
248 | /// Represents a character-granular source range. |
249 | /// |
250 | /// The underlying SourceRange can either specify the starting/ending character |
251 | /// of the range, or it can specify the start of the range and the start of the |
252 | /// last token of the range (a "token range"). In the token range case, the |
253 | /// size of the last token must be measured to determine the actual end of the |
254 | /// range. |
255 | class CharSourceRange { |
256 | SourceRange Range; |
257 | bool IsTokenRange = false; |
258 | |
259 | public: |
260 | CharSourceRange() = default; |
261 | CharSourceRange(SourceRange R, bool ITR) : Range(R), IsTokenRange(ITR) {} |
262 | |
263 | static CharSourceRange getTokenRange(SourceRange R) { |
264 | return CharSourceRange(R, true); |
265 | } |
266 | |
267 | static CharSourceRange getCharRange(SourceRange R) { |
268 | return CharSourceRange(R, false); |
269 | } |
270 | |
271 | static CharSourceRange getTokenRange(SourceLocation B, SourceLocation E) { |
272 | return getTokenRange(SourceRange(B, E)); |
273 | } |
274 | |
275 | static CharSourceRange getCharRange(SourceLocation B, SourceLocation E) { |
276 | return getCharRange(SourceRange(B, E)); |
277 | } |
278 | |
279 | /// Return true if the end of this range specifies the start of |
280 | /// the last token. Return false if the end of this range specifies the last |
281 | /// character in the range. |
282 | bool isTokenRange() const { return IsTokenRange; } |
283 | bool isCharRange() const { return !IsTokenRange; } |
284 | |
285 | SourceLocation getBegin() const { return Range.getBegin(); } |
286 | SourceLocation getEnd() const { return Range.getEnd(); } |
287 | SourceRange getAsRange() const { return Range; } |
288 | |
289 | void setBegin(SourceLocation b) { Range.setBegin(b); } |
290 | void setEnd(SourceLocation e) { Range.setEnd(e); } |
291 | void setTokenRange(bool TR) { IsTokenRange = TR; } |
292 | |
293 | bool isValid() const { return Range.isValid(); } |
294 | bool isInvalid() const { return !isValid(); } |
295 | }; |
296 | |
297 | /// Represents an unpacked "presumed" location which can be presented |
298 | /// to the user. |
299 | /// |
300 | /// A 'presumed' location can be modified by \#line and GNU line marker |
301 | /// directives and is always the expansion point of a normal location. |
302 | /// |
303 | /// You can get a PresumedLoc from a SourceLocation with SourceManager. |
304 | class PresumedLoc { |
305 | const char *Filename = nullptr; |
306 | FileID ID; |
307 | unsigned Line, Col; |
308 | SourceLocation IncludeLoc; |
309 | |
310 | public: |
311 | PresumedLoc() = default; |
312 | PresumedLoc(const char *FN, FileID FID, unsigned Ln, unsigned Co, |
313 | SourceLocation IL) |
314 | : Filename(FN), ID(FID), Line(Ln), Col(Co), IncludeLoc(IL) {} |
315 | |
316 | /// Return true if this object is invalid or uninitialized. |
317 | /// |
318 | /// This occurs when created with invalid source locations or when walking |
319 | /// off the top of a \#include stack. |
320 | bool isInvalid() const { return Filename == nullptr; } |
321 | bool isValid() const { return Filename != nullptr; } |
322 | |
323 | /// Return the presumed filename of this location. |
324 | /// |
325 | /// This can be affected by \#line etc. |
326 | const char *getFilename() const { |
327 | assert(isValid())(static_cast <bool> (isValid()) ? void (0) : __assert_fail ("isValid()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 327, __extension__ __PRETTY_FUNCTION__)); |
328 | return Filename; |
329 | } |
330 | |
331 | FileID getFileID() const { |
332 | assert(isValid())(static_cast <bool> (isValid()) ? void (0) : __assert_fail ("isValid()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 332, __extension__ __PRETTY_FUNCTION__)); |
333 | return ID; |
334 | } |
335 | |
336 | /// Return the presumed line number of this location. |
337 | /// |
338 | /// This can be affected by \#line etc. |
339 | unsigned getLine() const { |
340 | assert(isValid())(static_cast <bool> (isValid()) ? void (0) : __assert_fail ("isValid()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 340, __extension__ __PRETTY_FUNCTION__)); |
341 | return Line; |
342 | } |
343 | |
344 | /// Return the presumed column number of this location. |
345 | /// |
346 | /// This cannot be affected by \#line, but is packaged here for convenience. |
347 | unsigned getColumn() const { |
348 | assert(isValid())(static_cast <bool> (isValid()) ? void (0) : __assert_fail ("isValid()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 348, __extension__ __PRETTY_FUNCTION__)); |
349 | return Col; |
350 | } |
351 | |
352 | /// Return the presumed include location of this location. |
353 | /// |
354 | /// This can be affected by GNU linemarker directives. |
355 | SourceLocation getIncludeLoc() const { |
356 | assert(isValid())(static_cast <bool> (isValid()) ? void (0) : __assert_fail ("isValid()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 356, __extension__ __PRETTY_FUNCTION__)); |
357 | return IncludeLoc; |
358 | } |
359 | }; |
360 | |
361 | class FileEntry; |
362 | |
363 | /// A SourceLocation and its associated SourceManager. |
364 | /// |
365 | /// This is useful for argument passing to functions that expect both objects. |
366 | /// |
367 | /// This class does not guarantee the presence of either the SourceManager or |
368 | /// a valid SourceLocation. Clients should use `isValid()` and `hasManager()` |
369 | /// before calling the member functions. |
370 | class FullSourceLoc : public SourceLocation { |
371 | const SourceManager *SrcMgr = nullptr; |
372 | |
373 | public: |
374 | /// Creates a FullSourceLoc where isValid() returns \c false. |
375 | FullSourceLoc() = default; |
376 | |
377 | explicit FullSourceLoc(SourceLocation Loc, const SourceManager &SM) |
378 | : SourceLocation(Loc), SrcMgr(&SM) {} |
379 | |
380 | /// Checks whether the SourceManager is present. |
381 | bool hasManager() const { return SrcMgr != nullptr; } |
382 | |
383 | /// \pre hasManager() |
384 | const SourceManager &getManager() const { |
385 | assert(SrcMgr && "SourceManager is NULL.")(static_cast <bool> (SrcMgr && "SourceManager is NULL." ) ? void (0) : __assert_fail ("SrcMgr && \"SourceManager is NULL.\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 385, __extension__ __PRETTY_FUNCTION__)); |
386 | return *SrcMgr; |
387 | } |
388 | |
389 | FileID getFileID() const; |
390 | |
391 | FullSourceLoc getExpansionLoc() const; |
392 | FullSourceLoc getSpellingLoc() const; |
393 | FullSourceLoc getFileLoc() const; |
394 | PresumedLoc getPresumedLoc(bool UseLineDirectives = true) const; |
395 | bool isMacroArgExpansion(FullSourceLoc *StartLoc = nullptr) const; |
396 | FullSourceLoc getImmediateMacroCallerLoc() const; |
397 | std::pair<FullSourceLoc, StringRef> getModuleImportLoc() const; |
398 | unsigned getFileOffset() const; |
399 | |
400 | unsigned getExpansionLineNumber(bool *Invalid = nullptr) const; |
401 | unsigned getExpansionColumnNumber(bool *Invalid = nullptr) const; |
402 | |
403 | unsigned getSpellingLineNumber(bool *Invalid = nullptr) const; |
404 | unsigned getSpellingColumnNumber(bool *Invalid = nullptr) const; |
405 | |
406 | const char *getCharacterData(bool *Invalid = nullptr) const; |
407 | |
408 | unsigned getLineNumber(bool *Invalid = nullptr) const; |
409 | unsigned getColumnNumber(bool *Invalid = nullptr) const; |
410 | |
411 | const FileEntry *getFileEntry() const; |
412 | |
413 | /// Return a StringRef to the source buffer data for the |
414 | /// specified FileID. |
415 | StringRef getBufferData(bool *Invalid = nullptr) const; |
416 | |
417 | /// Decompose the specified location into a raw FileID + Offset pair. |
418 | /// |
419 | /// The first element is the FileID, the second is the offset from the |
420 | /// start of the buffer of the location. |
421 | std::pair<FileID, unsigned> getDecomposedLoc() const; |
422 | |
423 | bool isInSystemHeader() const; |
424 | |
425 | /// Determines the order of 2 source locations in the translation unit. |
426 | /// |
427 | /// \returns true if this source location comes before 'Loc', false otherwise. |
428 | bool isBeforeInTranslationUnitThan(SourceLocation Loc) const; |
429 | |
430 | /// Determines the order of 2 source locations in the translation unit. |
431 | /// |
432 | /// \returns true if this source location comes before 'Loc', false otherwise. |
433 | bool isBeforeInTranslationUnitThan(FullSourceLoc Loc) const { |
434 | assert(Loc.isValid())(static_cast <bool> (Loc.isValid()) ? void (0) : __assert_fail ("Loc.isValid()", "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 434, __extension__ __PRETTY_FUNCTION__)); |
435 | assert(SrcMgr == Loc.SrcMgr && "Loc comes from another SourceManager!")(static_cast <bool> (SrcMgr == Loc.SrcMgr && "Loc comes from another SourceManager!" ) ? void (0) : __assert_fail ("SrcMgr == Loc.SrcMgr && \"Loc comes from another SourceManager!\"" , "/build/llvm-toolchain-snapshot-14~++20210828111110+16086d47c0d0/clang/include/clang/Basic/SourceLocation.h" , 435, __extension__ __PRETTY_FUNCTION__)); |
436 | return isBeforeInTranslationUnitThan((SourceLocation)Loc); |
437 | } |
438 | |
439 | /// Comparison function class, useful for sorting FullSourceLocs. |
440 | struct BeforeThanCompare { |
441 | bool operator()(const FullSourceLoc& lhs, const FullSourceLoc& rhs) const { |
442 | return lhs.isBeforeInTranslationUnitThan(rhs); |
443 | } |
444 | }; |
445 | |
446 | /// Prints information about this FullSourceLoc to stderr. |
447 | /// |
448 | /// This is useful for debugging. |
449 | void dump() const; |
450 | |
451 | friend bool |
452 | operator==(const FullSourceLoc &LHS, const FullSourceLoc &RHS) { |
453 | return LHS.getRawEncoding() == RHS.getRawEncoding() && |
454 | LHS.SrcMgr == RHS.SrcMgr; |
455 | } |
456 | |
457 | friend bool |
458 | operator!=(const FullSourceLoc &LHS, const FullSourceLoc &RHS) { |
459 | return !(LHS == RHS); |
460 | } |
461 | }; |
462 | |
463 | } // namespace clang |
464 | |
465 | namespace llvm { |
466 | |
467 | /// Define DenseMapInfo so that FileID's can be used as keys in DenseMap and |
468 | /// DenseSets. |
469 | template <> |
470 | struct DenseMapInfo<clang::FileID> { |
471 | static clang::FileID getEmptyKey() { |
472 | return {}; |
473 | } |
474 | |
475 | static clang::FileID getTombstoneKey() { |
476 | return clang::FileID::getSentinel(); |
477 | } |
478 | |
479 | static unsigned getHashValue(clang::FileID S) { |
480 | return S.getHashValue(); |
481 | } |
482 | |
483 | static bool isEqual(clang::FileID LHS, clang::FileID RHS) { |
484 | return LHS == RHS; |
485 | } |
486 | }; |
487 | |
488 | /// Define DenseMapInfo so that SourceLocation's can be used as keys in |
489 | /// DenseMap and DenseSet. This trait class is eqivalent to |
490 | /// DenseMapInfo<unsigned> which uses SourceLocation::ID is used as a key. |
491 | template <> struct DenseMapInfo<clang::SourceLocation> { |
492 | static clang::SourceLocation getEmptyKey() { |
493 | constexpr clang::SourceLocation::UIntTy Zero = 0; |
494 | return clang::SourceLocation::getFromRawEncoding(~Zero); |
495 | } |
496 | |
497 | static clang::SourceLocation getTombstoneKey() { |
498 | constexpr clang::SourceLocation::UIntTy Zero = 0; |
499 | return clang::SourceLocation::getFromRawEncoding(~Zero - 1); |
500 | } |
501 | |
502 | static unsigned getHashValue(clang::SourceLocation Loc) { |
503 | return Loc.getHashValue(); |
504 | } |
505 | |
506 | static bool isEqual(clang::SourceLocation LHS, clang::SourceLocation RHS) { |
507 | return LHS == RHS; |
508 | } |
509 | }; |
510 | |
511 | // Allow calling FoldingSetNodeID::Add with SourceLocation object as parameter |
512 | template <> struct FoldingSetTrait<clang::SourceLocation> { |
513 | static void Profile(const clang::SourceLocation &X, FoldingSetNodeID &ID); |
514 | }; |
515 | |
516 | } // namespace llvm |
517 | |
518 | #endif // LLVM_CLANG_BASIC_SOURCELOCATION_H |